WO2023272945A1 - 电机和车辆 - Google Patents

电机和车辆 Download PDF

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Publication number
WO2023272945A1
WO2023272945A1 PCT/CN2021/117903 CN2021117903W WO2023272945A1 WO 2023272945 A1 WO2023272945 A1 WO 2023272945A1 CN 2021117903 W CN2021117903 W CN 2021117903W WO 2023272945 A1 WO2023272945 A1 WO 2023272945A1
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WO
WIPO (PCT)
Prior art keywords
elastic
conductive
bearing
contact
parts
Prior art date
Application number
PCT/CN2021/117903
Other languages
English (en)
French (fr)
Inventor
高劲军
胡义明
徐旺
杨通
Original Assignee
安徽威灵汽车部件有限公司
广东威灵汽车部件有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202110748121.4A external-priority patent/CN115566838A/zh
Priority claimed from CN202110980877.1A external-priority patent/CN115720016A/zh
Application filed by 安徽威灵汽车部件有限公司, 广东威灵汽车部件有限公司 filed Critical 安徽威灵汽车部件有限公司
Priority to EP21947878.1A priority Critical patent/EP4199327A4/en
Publication of WO2023272945A1 publication Critical patent/WO2023272945A1/zh
Priority to US18/114,582 priority patent/US20230216372A1/en

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08Structural association with bearings
    • H02K7/083Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K11/00Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/40Structural association with grounding devices
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/04Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1732Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/003Couplings; Details of shafts

Definitions

  • the present application relates to the technical field of motors, in particular, to a motor and a vehicle.
  • the motor When the motor converts electrical energy into mechanical energy, the motor uses a pulse width modulation inverter.
  • the inverter supplies power to the field winding of the motor, it will generate a high-frequency common-mode voltage, which is coupled by the parasitic capacitance of the motor.
  • a shaft voltage is formed on the motor rotor.
  • the shaft voltage exceeds the breakdown voltage threshold of the oil film on the motor rotor, a shaft current will be formed on the motor rotor.
  • the shaft current When the shaft current is discharged to the main bearing of the motor rotor, it will be in the main bearing.
  • a plurality of electrical corrosion lines arranged in parallel are formed on the inner and outer ring raceways of the inner and outer rings, which will cause electrical corrosion to the main bearing, cause the temperature of the main bearing to rise, accelerate the wear of the main bearing and shorten the life of the main bearing, and also affect the vibration and noise of the motor. produce adverse effects.
  • the following methods are often adopted:
  • This application aims to solve at least one of the technical problems existing in the prior art or related art.
  • the first aspect of the application proposes an electric machine.
  • a second aspect of the application proposes a vehicle.
  • the third aspect of the present application proposes a motor.
  • a fourth aspect of the present application proposes a vehicle.
  • a motor which includes a metal part, a rotor core, a rotating shaft, a conductive bearing and an elastic conductive part, the rotor core is arranged on one side of the metal part, and the rotor iron
  • the core includes a bore.
  • the rotating shaft is connected with the iron core of the rotor, and the rotating shaft is passed through the shaft hole.
  • the conductive bearing is sleeved on the rotating shaft. At least part of the elastic conductive member is disposed between the conductive bearing and the metal member.
  • the motor provided by the present application includes a metal part, a rotor core, a rotating shaft, a conductive bearing and an elastic conductive part, wherein the rotor core is arranged on one side of the metal part.
  • the metal piece may be an end cover of the motor, or a casing of the motor, or the like.
  • the metal part is an end cover, the end cover is located on one axial side of the rotor core.
  • the metal part is a casing
  • the casing is arranged around the outer circumference of the rotor core.
  • the rotor iron core has a shaft hole, and the shaft hole is arranged on the rotor iron core along the axial direction, and the rotating shaft is penetrated in the shaft hole, and the rotating shaft is connected with the rotor iron core.
  • the rotating shaft includes two opposite exposed ends, which are respectively a first exposed end and a second exposed end.
  • the motor can be used as a driving motor, and the first exposed end is used for connecting with the vehicle.
  • Loads such as wheels are connected to drive the wheels to rotate when the rotating shaft rotates to realize power output.
  • the conductive bearing is sleeved on the rotating shaft, and the conductive bearing is an additional bearing independent of the slewing bearing of the motor, and plays the role of connecting the rotating shaft and the elastic conductive member. Further, the conductive bearing is sleeved on the second exposed end. At least part of the elastic conductive part is arranged between the conductive bearing and the metal part, and the elastic conductive part generates a compressive force through its own elastic deformation, so as to be in close contact with the conductive bearing, thereby reducing the contact resistance between the elastic conductive part and the conductive bearing , to guide the shaft current, prevent the shaft current from corroding the slewing bearing of the motor, and prolong the service life of the conductive bearing and slewing bearing.
  • the elastic conductive part can be kept stable
  • the ground is in contact with the conductive bearing, and will not be ineffectively contacted due to the movement of the conductive bearing, so as to ensure the conductive connection.
  • it can also prevent the conductive bearing from being damaged due to stress concentration, and avoid the abnormal wear of the conductive bearing due to the partial load force.
  • the present application can realize the anti-corrosion effect only by sheathing the conductive bearing and the elastic conductive part on the rotating shaft, and has the advantages of simple structure, reasonable layout, low cost and simple assembly.
  • the conductive bearing includes an inner ring and an outer ring sleeved outside the inner ring, and there is a gap between the inner ring and the outer ring.
  • the conductive bearing also includes two sealing rings, and the two sealing rings are respectively sealed between the two ends of the outer ring and the inner ring along the axial direction (that is, the thickness direction), that is, the two sealing rings are respectively sealed on the conductive bearing along the axial direction (that is, the thickness direction).
  • the steel ball of the conductive bearing is sealed between the two sealing rings, the inner ring and the outer ring, and the gap between the inner ring and the outer ring is filled with conductive grease, and the shaft current can leak to the
  • the inner ring of the conductive bearing is then quickly transferred to the outer ring through the conductive grease, so as to ensure that the conductive bearing has excellent electrical conductivity. Due to the presence of conductive grease, the resistance between the inner ring and the outer ring of the conductive bearing is reduced, and it has good electrical conductivity. Compared with the slewing bearing, the electrical resistance of the conductive bearing is smaller.
  • the conductive bearing is hardly subjected to axial and radial loads.
  • the conductive bearing is a deep groove ball bearing.
  • the conductive bearing plays the role of conducting the shaft current, and the selection of a conductive bearing with a smaller size series can obtain better high-speed performance and conductivity. Therefore, the size of the conductive bearing is much smaller than that of the slewing bearing. Further, the conductive bearing is installed at the tail end (the second exposed end) of the rotating shaft, and the conductive bearing is in close contact with the elastic conductive member and is electrically connected.
  • the elastic conductive part is arranged between the metal part and the conductive bearing in a compressed state, and the reverse force generated by the elastic conductive part in order to return to its original shape will be pressed against the conductive bearing.
  • the connection mode between the elastic conductive part and the metal part can be directly connected, or the elastic conductive part can be indirectly connected to the metal part through other conductive parts, that is, the axial current can be directly guided through the elastic conductive part To the metal parts, it can also be transmitted indirectly through other conductive parts.
  • the grounding of the metal parts can realize the discharge of the shaft current to the earth through the metal parts.
  • the motor provided by the present application can not only be used in the field of vehicles, as a driving motor of the vehicle, but also in the field of home appliances, such as air conditioners, clothes processing equipment, cooking appliances, etc.
  • the elastic conductive member includes a connection part and a plurality of elastic parts, the plurality of elastic parts are respectively connected to the connection part, and each elastic part extends in a zigzag manner, and the elastic part is arranged between the conductive bearing and the metal part between.
  • the elastic conductive member includes a connection part and a plurality of elastic parts.
  • the connection part serves as a supporting structure, and the plurality of elastic parts are respectively arranged on the connection part.
  • the elastic parts can at least protrude in a direction away from the central axis, that is, each elastic part at least protrudes outward, the elastic parts are sandwiched between the conductive bearing and the metal part, and the elastic parts can be deformed relative to the connecting part.
  • the elastic part protruding outward can be conveniently contacted with metal parts and conductive bearings, and can also provide a certain deformation space for its own deformation.
  • the elastic conductive part is a stamped and bent part of sheet metal.
  • the connecting part and the multiple elastic parts are of an integrated structure, and the connecting part and the multiple elastic parts are specifically of an integrated structure. Because the mechanical properties of the integrated structure are good, the connection strength between the connecting part and the multiple elastic parts can be improved.
  • the connection part and multiple elastic parts can be integrally manufactured for mass production, so as to improve the processing efficiency of the product and reduce the processing cost of the product.
  • the integral structure of the connecting part and multiple elastic parts the integrity of the elastic conductive part is improved, the number of parts is reduced, the installation process is reduced, the installation efficiency is improved, and the elastic conductive part The installation is more convenient and reliable.
  • the elastic portion includes a first contact portion and a second contact portion, the first contact portion is connected to the connection portion, and the first contact portion protrudes in a direction away from the central axis.
  • the second contact portion is connected to the first contact portion, the second contact portion protrudes toward the direction close to the central axis, and at least a part of the second contact portion is in contact with the conductive bearing.
  • the elastic part includes a first contact part and a second contact part, wherein the first contact part is connected to the connection part, and the first contact part protrudes in a direction away from the central axis, that is, the first contact part protrudes outward
  • the outer surface of the first contact part can be connected with the metal part, or the outer surface of the first contact part can be connected with other conductive components.
  • the first contact portion has a first end and a second end that are away from each other, the first end of the first contact portion is connected to the connection portion, the second end of the first contact portion is connected to the second contact portion, and the second contact portion
  • the portion protrudes toward the direction close to the central axis, that is, the second contact portion protrudes inward, so that at least a part of the second contact portion is in contact with the outer ring of the conductive bearing.
  • the first contact part and the second contact part are S-shaped as a whole, the first contact part protruding outward is connected with metal parts or other conductive parts, the second contact part protruding inward is in contact with the outer ring of the conductive bearing, and the protruding
  • the first contact portion and the second contact portion with opposite directions can facilitate the pressing of the elastic conductive member on the conductive bearing, and provide better buffering for the eccentric load force of the conductive bearing during use, so that the conductive bearing is stressed Balanced to achieve a good conduction state.
  • the elastic part includes a first contact part and a second contact part, the first end of the first contact part is bent and connected to the connecting part, and the second end of the first contact part is along the shaft to extend.
  • the second contact portion is connected to the second end of the first contact portion, and the second contact portion is curled in a direction away from or toward the central axis.
  • the elastic part includes a first contact part and a second contact part, the first end of the first contact part is bent and connected to the connecting part, and the connection between the first contact part and the connecting part is in a soft transition shape, so that To avoid stress concentration at the connection between the two, on the one hand, it prevents breakage during sheet metal processing, and on the other hand, it also provides a greater degree of freedom for the deformation of the elastic part relative to the connecting part.
  • the second end of the first contact portion extends in the axial direction to form an axial inner surface facing the central axis, and the axial inner surface is in contact with the outer ring of the conductive bearing so as to be in close contact with the conductive bearing.
  • the second contact portion is connected to the second end of the first contact portion, and the second contact portion is curled in a direction away from or toward the central axis, and the curled second contact portion can enhance the overall structural strength of the elastic portion and improve the elastic conductive member service life. Specifically, when the second contact portion is curled in a direction away from the central axis, the second contact portion is in contact with the conductive connection piece/metal piece.
  • the elastic part is disposed on the peripheral wall of the connecting part.
  • the outer contour of the connection part is circular, and the connection part then comprises a peripheral wall.
  • the first contact part of each elastic part starts from the outer peripheral wall of the connecting part. Since the elastic conductive part is a sheet metal bending part, limited by the processing method, the first contact part must have a certain gap in the radial direction. extend. During the rotation of the rotating shaft, it is inevitable that the conductive bearing will be subjected to some radial eccentric load force. Compared with other end faces, the first contact part extending in the radial direction can play a good buffering role and prevent elastic The part is fractured by the impact of radial force.
  • each elastic portion is located on one axial side of the connecting portion.
  • each elastic part is located on one axial side of the connecting part, that is, at least a part of the elastic part protrudes from the connecting part in the axial direction, that is to say, the connecting part and the elastic part can form an installation conductive
  • the connection part not only plays the role of setting the elastic part, but also can provide support for the conductive bearing.
  • a limit step is provided on the rotating shaft, and the conductive bearing is sleeved on the rotating shaft. The first axial end of the conductive bearing abuts against the limit step, and the second axial end of the conductive bearing abuts against the elastic part and the connection.
  • the elastic part located on one side of the connecting part in the axial direction will not be disturbed by the connecting part when deformed, but can directly transmit the elastic force to the conductive bearing, thereby ensuring the clamping fit between the elastic part and the conductive bearing.
  • the elastic conductive member includes a plurality of connecting parts and a plurality of elastic parts, any elastic part of the plurality of elastic parts is connected between two connecting parts, and each elastic part faces away from or Protrudes toward the central axis.
  • the elastic conductive member includes a plurality of connecting parts and a plurality of elastic parts, and any elastic part in the plurality of elastic parts is connected between two connecting parts, that is, a plurality of elastic parts and a plurality of connecting parts are connected end to end to form
  • each elastic portion protrudes in a direction away from or toward the central axis, that is, the elastic portion is in a wave-like curved structure, and the elastic portion in the curved structure can be deformed so as to be clamped on the conductive bearing.
  • connection part between the two elastic parts can be straight or bent, and the connection part can not only play a connection function, but also be in contact with the conductive bearing, and transmit the elastic force generated by the elastic part to the conductive bearing.
  • the outer peripheral wall of the bearing so that the elastic conductive member is clamped on the conductive bearing, so that the contact resistance between the two is small, so that the shaft current is more easily transmitted to the metal part through the conductive bearing and the elastic conductive member, and then In order to achieve grounding, significantly reduce the corrosion of slewing bearings.
  • the connecting portion when the connecting portion is straight, the connecting portion can realize the supporting function, and can also transmit the force generated by the elastic portion.
  • At least one of the multiple connecting parts is curved.
  • the connecting part itself can also be deformed to generate elastic force. Then, for the conductive bearing, the clamping force it bears can not only come from the elastic part, but also come from Based on the curved connection part, in a limited space, the clamping force is maximized to ensure the clamping effect between the elastic conductive part and the conductive bearing.
  • each of the plurality of elastic parts protrudes in a direction away from the central axis to form a first elastic part, and each of the plurality of connecting parts bends in a direction away from the central axis A first connecting portion is formed.
  • Each first connecting portion includes a wall facing the central axis as an arc surface, and the arc surface is in contact with the conductive bearing.
  • each elastic portion protrudes in a direction away from the central axis to form a first elastic portion protruding outward
  • each connecting portion bends in a direction away from the central axis, that is, each connecting portion bends outward to form a
  • the first connection part, the first connection part includes an inner arc surface, when the elastic conductive part is arranged on the conductive bearing, the arc surface can contact the outer peripheral wall of the conductive bearing, thereby increasing the contact area between the two, the elastic part Both the elastic force generated by the deformation of the first connecting part and the first connecting part can be applied to the conductive bearing through the arc surface.
  • each of the plurality of elastic parts protrudes toward the direction of the central axis to form a second elastic part
  • the second elastic part includes a contact part facing the central axis, the contact part and the conductive bearing touch.
  • Each connecting portion of the plurality of connecting portions is bent in a direction away from the central axis to form a first connecting portion.
  • each elastic portion of the plurality of elastic portions protrudes toward the direction of the central axis to form a second elastic portion, that is, the second elastic portion protrudes inwardly, and the second elastic portion includes a contact portion facing the central axis, The contact portion is in contact with the conductive bearing, and each of the plurality of connecting portions is bent in a direction away from the central axis to form a first connecting portion, that is, the first connecting portion protrudes outward, and the first connecting portion includes a circle that deviates from the central axis Arc surface, the arc surface can be in contact with metal parts or conductive connectors.
  • each of the plurality of elastic portions protrudes toward a direction away from the central axis to form a first elastic portion
  • each of the plurality of connecting portions protrudes toward a direction close to the central axis to form a second connection.
  • Each second connecting portion includes a contact end facing the central axis, and the contact end abuts against the outer periphery of the conductive bearing.
  • each elastic portion protrudes in a direction away from the central axis, that is, the elastic portion protrudes outward
  • each of the plurality of connecting portions protrudes in a direction close to the central axis, that is, each connecting portion protrudes toward the central axis.
  • the inner bend protrudes to form the second connecting portion.
  • Each second connection portion includes a contact end facing the central axis, that is, each second connection portion includes a contact end protruding inward, and the contact end abuts against the outer periphery of the conductive bearing. The elastic force generated by the elastic part and the second connecting part will be transmitted to the outer wall of the conductive bearing through the contact end.
  • connection parts and the plurality of elastic parts are respectively arranged at uniform intervals, so as to ensure the balance of force on the conductive bearing, and will not be tilted due to biased load.
  • the connecting portion is an arc segment, and a plurality of arc segments are connected at intervals to the outwardly protruding elastic portion, and both the arc segment and the elastic portion can provide a deformation amount.
  • the arc section can be in contact with the outer ring of the conductive bearing, the elastic part can be in contact with the conductive connector, and the connecting part and the elastic part are elastically deformed as a whole, so that the elastic conductive part is sandwiched between the conductive bearing and the conductive connector in a compressed state between.
  • each elastic portion protrudes in a direction away from the central axis, and the arc segment may bend in a direction away from the central axis, or in a direction close to the central axis. That is to say, the elastic portion and the arc-shaped section have a wave-like structure as a whole.
  • the elastic conductive member further includes a release port, and the release port is provided on any one of the plurality of connection parts.
  • the elastic conductive part also includes a release port, which is provided on any one of the multiple connecting parts.
  • the release port can provide the elastic conductive part with a degree of freedom in the circumferential direction, which can avoid the The release port can provide a larger deformation range to release the stress during the deformation process of the elastic part and the connecting part.
  • the release port is provided through the axial direction of the elastic conductive member.
  • the release port is provided through the axial direction of the elastic conductive member, so that the excessive stress and excessive deformation of the elastic conductive member can be released through the partial release port at the corresponding position, thereby improving Fatigue safety factor for elastic conductive parts.
  • the release port is located at the center of the connecting part.
  • the release port is arranged axially through the connection part, so that the connection part with the release port is the target connection part, and the two elastic parts connected to the target connection part are the first elastic part and the second elastic part .
  • the connection structure of equal length ensures the reliable supporting performance of the first elastic part and the second connecting part.
  • the structure of the elastic conductive part is asymmetrical due to the lack of a connecting part on one side of the elastic part. At this time, multiple elastic parts act on the clamping of the conductive bearing. The resultant force of the force is not zero, and it is easy to cause the conductive bearing to be unbalanced and wear.
  • a plurality of elastic parts are evenly spaced and distributed.
  • the evenly spaced elastic parts can make the conductive bearing receive a clamping force with a resultant force of zero, and prevent the conductive bearing from exacerbating wear due to uneven stress due to the arrangement of the elastic conductive member.
  • the elastic conductive member includes a plurality of elastic parts and one connecting part
  • the structural sizes of the three elastic parts are all the same, and the three elastic parts are evenly distributed on the connecting part, That is, the interval between two adjacent elastic portions among the three elastic portions is 120°.
  • the three elastic parts are clamped on the outer ring of the conductive bearing through elastic deformation.
  • the clamping force generated by the three elastic parts is the same, so that the resultant force of the three elastic parts on the conductive bearing is zero , it can avoid the resultant force generated by the three elastic parts along the radial direction of the conductive bearing due to structural asymmetry, which will adversely affect the life of the conductive bearing.
  • the elastic force generated by the elastic part can make the elastic part fully contact with the conductive bearing. In turn, the contact resistance is reduced and a good conduction path is formed.
  • the 4 elastic parts are divided into two groups, that is, each group contains two elastic parts, and each group of elastic parts is distributed symmetrically along the diameter direction on the connecting part in a ring structure, and the two groups of elastic parts
  • the parts are evenly distributed, that is, the angle between two adjacent elastic parts is 90°, that is, the connecting lines of the two groups of elastic parts are perpendicular to each other.
  • the two groups of elastic parts are evenly and symmetrically distributed on the connecting part, and the clamping force generated is the same, the resultant force of the two groups of elastic parts on the conductive bearing is zero, avoiding the two groups of elastic parts due to structural asymmetry.
  • a resultant force along the radial direction of the conductive bearing which in turn has an adverse effect on the life of the conductive bearing.
  • the purpose of the elastic force generated by the elastic piece is only to fully contact with the conductive bearing, thereby reducing the contact resistance and forming a good conduction path.
  • the elastic conductive member includes multiple elastic parts and multiple connecting parts
  • the number of elastic parts is 3, the number of connecting parts is 3, the number of release ports is 1, and the number of 3 elastic parts and 3
  • the two connecting parts are connected alternately, and the release port is set at the center of one connecting part.
  • the three elastic parts are evenly distributed between the three connecting parts, that is, the interval angle between two adjacent elastic parts among the three elastic parts is 120°.
  • the number of elastic parts is four, the number of connecting parts is four, and the angle between two adjacent elastic parts is 90°.
  • the motor further includes an escape opening, the escape opening is arranged on the elastic conductive member, and at least a part of the conductive bearing is located in the escape opening.
  • the elastic conductive part also includes a relief port, which is provided on the elastic conductive part, and the relief port can avoid the inner ring of the conductive bearing.
  • the inner ring and the rotating shaft have an interference fit, and the inner ring will rotate synchronously with the rotating shaft.
  • the outer ring of the conductive bearing is in contact with the elastic conductive part, and the outer ring and the elastic conductive part are in a static position and will not rotate with the movement of the rotating shaft.
  • the avoidance port is axially penetratingly provided on the elastic conductive member.
  • the elastic conductive member includes a plurality of elastic portions disposed on the connecting portion, and the escape opening is disposed on the connecting portion.
  • the connecting portion has an annular structure.
  • the elastic conductive member includes a plurality of connecting parts and a plurality of elastic parts, one connecting part is connected between two adjacent elastic parts, and the connecting parts and the elastic parts are connected and surrounded to form an escape opening.
  • the elastic conductive part has a hollow structure, so that the contact between the elastic conductive part and the inner ring of the conductive bearing can be avoided. If the elastic conductive part has a non-hollow structure, the axial end of the inner ring of the conductive bearing The part will be in contact with the elastic conductive part, which will generate friction torque and interfere with the rotation of the conductive bearing.
  • connection between the connection part and the elastic part has a rounded transition.
  • the elastic conductive part is a sheet metal part.
  • the elastic conductive parts are stamped and bent parts of sheet metal.
  • the connecting part and the multiple elastic parts are of an integrated structure, and the connecting part and the multiple elastic parts are specifically of an integrated structure. Because the mechanical properties of the integrated structure are good, the connection strength between the connecting part and the multiple elastic parts can be improved.
  • the connection part and multiple elastic parts can be integrally manufactured for mass production, so as to improve the processing efficiency of the product and reduce the processing cost of the product.
  • the integral structure of the connecting part and multiple elastic parts the integrity of the elastic conductive part is improved, the number of parts is reduced, the installation process is reduced, the installation efficiency is improved, and the elastic conductive part Installation is more convenient and reliable.
  • the motor further includes a conductive connection part, which can be connected to the metal part, and at least part of the elastic conductive part is located between the conductive connection part and the conductive bearing.
  • the motor also includes conductive connectors, which are respectively connected to the metal part and the elastic conductive part, that is, in order to realize the drainage of the shaft current, the shaft current at the elastic conductive part is not directly connected to the metal part, Instead, the conductive connectors are used to lead to the metal parts.
  • the conductive connector is an aluminum alloy casting, specifically, the conductive connector has a plate-like structure, the conductive connector is installed on the end cover of the motor, and the conductive connector is fully in contact with the end cover.
  • the conductive connector includes a board body and a mounting part, and the board body can be connected to the metal part.
  • the mounting part is arranged on the plate body toward the rotating shaft, the mounting part includes a mounting position, and at least a part of the elastic conductive member is disposed at the mounting position.
  • the conductive connector includes a board body and a mounting part, and the board body can be connected to the metal part.
  • the installation part is arranged on the board body toward the rotating shaft, that is, the installation part is axially extended and arranged on the board body.
  • the installation part includes an installation position, at least a part of the elastic conductive part is arranged at the installation position, so as to facilitate the installation and positioning of the elastic conductive part.
  • the board body and the installation part are of an integrated structure.
  • the installation part includes a support part and an abutment part, and the support part is provided on the board body.
  • the abutment part is connected to the axial end of the support part, the installation position is arranged between the abutment part and the support part, and the elastic conductive parts are in contact with the abutment part and the support part respectively.
  • the installation part includes a support part and an abutment part, and the support part extends along the axial direction and is arranged on the plate body.
  • the abutment part is connected to the axial end of the support part, and the installation position is set between the abutment part and the support part.
  • the support part has a ring structure, and the abutment part also has a ring structure.
  • the inner diameter of the support part is larger than that of the abutment part. , that is, the installation position appears as an annular step position (annular counterbore).
  • the counterbore and the conductive bearing have a concentric structure, and an annular gap will be formed between the abutment part and the conductive bearing.
  • the installation space is used for accommodating at least a part of the elastic conductive element.
  • the elastic conductive member is fully in contact with the conductive bearing and the mounting part through elastic deformation, thereby forming a good conductive path.
  • the shaft current includes two conductive paths, one of which passes through the rotating shaft, conductive bearings, elastic conductive parts, conductive connecting parts and metal parts in sequence. The second is to pass through the rotating shaft, the slewing bearing and the end cover in turn. And because the resistance of the first conductive path is smaller than that of the second conductive path, that is, the shaft current will be preferentially transmitted from the first conductive path, preventing the shaft current from corroding the slewing bearing and prolonging the service life of the slewing bearing.
  • the supporting part can form an axial limit for the conductive bearing and the elastic conductive part
  • the abutting part can form a radial limit for the conductive bearing and the elastic conductive part, which is also convenient for the elastic conductive part and the elastic conductive part to be connected under the premise of ensuring conductive contact. Positioning installation of conductive bearings.
  • the abutment portion includes an abutment wall, a shaft side wall and a guide portion, and the abutment wall faces the elastic conductive member.
  • the shaft sidewall faces away from the support portion.
  • the guide part is arranged at the junction of the abutting wall and the side wall of the shaft.
  • the abutment portion includes an abutment wall, a shaft side wall and a guide portion, the abutment wall faces the elastic conductive member, and the elastic conductive member can be in contact with the abutment wall.
  • the shaft side wall is disposed away from the support portion.
  • the guide part is arranged at the junction of the abutment wall and the side wall of the shaft.
  • the guide portion may be a guide arc, a guide slope, or the like.
  • the guide part includes a guide slope
  • the axial depth h of the guide slope is greater than 0mm and less than or equal to 5mm
  • the angle between the guide slope and the tangent plane where the abutting wall is located is greater than 0° and less than or equal to 30°.
  • the support part has a hollow cavity opening toward the rotating shaft.
  • the support part has a hollow cavity that opens toward the rotating shaft.
  • the hollow cavity can prevent the conductive connector from contacting the inner ring of the conductive bearing. If the conductive connector is not hollow, the axial end of the inner ring of the conductive bearing will In contact with the conductive connector, friction torque is generated to interfere with the rotation of the conductive bearing.
  • the metal part includes an end cover, the end cover is arranged on one axial side of the rotor core, and at least a part of the elastic conductive member is arranged between the end cover and the conductive bearing.
  • the metal part includes an end cap, which is provided on one axial side of the rotor core.
  • the end cover is disposed close to the second exposed end of the rotating shaft, that is, the end cover is a rear end cover.
  • At least a part of the elastic conductive part is arranged between the end cover and the conductive bearing, and the position of the end cover is relatively close to the conductive bearing, so that the shaft current can be led out quickly, and the material cost of the elastic conductive part and the conductive connecting part can also be saved, so that The layout of the conductive path is more rationalized.
  • the inner diameter of the conductive bearing is D1
  • the resistance of the inner and outer rings of the conductive bearing is R1.
  • the motor also includes a slewing bearing, which is sleeved on the rotating shaft.
  • the slewing bearing is located on the side of the conductive bearing away from the end cover.
  • the inner diameter of the slewing bearing is D2
  • the resistance of the inner and outer rings of the slewing bearing is R2, where D1 ⁇ D2, R1 ⁇ R2.
  • the resistance between the metal part and the slewing bearing is greater than the resistance between the metal part and the conductive bearing, so that the shaft current can preferentially flow out from the path where the conductive bearing is located.
  • the slewing bearing plays the role of slewing and supporting the rotating shaft.
  • the resistance between the inner and outer rings of the slewing bearing is greater than the resistance of the inner and outer rings of the conductive bearing, and the inner diameter of the slewing bearing is larger than that of the conductive bearing, which further facilitates the connection between the shaft current and the metal parts through the conductive bearing, prevents the shaft current from corroding the slewing bearing, and prolongs the life of the bearing. service life.
  • a vehicle including the motor provided by any of the above-mentioned designs.
  • the vehicle provided by the present application includes the motor provided by any of the above-mentioned designs, so it has all the beneficial effects of the motor, and will not be repeated here.
  • the vehicle may be a new energy vehicle.
  • new energy vehicles include pure electric vehicles, extended-range electric vehicles, hybrid vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc.
  • a motor which includes a metal part, a rotor core, a rotating shaft, a conductive bearing, and an elastic conductive part, wherein the metal part is grounded, and the rotor core is arranged on one side of the metal part.
  • the rotor core includes a shaft hole, the rotating shaft is connected with the rotor core, the rotating shaft is passed through the shaft hole, the conductive bearing is sleeved on the rotating shaft, the elastic conductive part is located on the axial side of the conductive bearing away from the rotor core, and the elastic conductive part At least one portion is in contact with the conductive bearing and the metal piece, respectively.
  • the motor provided by the application includes a metal part, a rotor core, a rotating shaft, a conductive bearing and an elastic conductive part, wherein the rotor core is arranged on one side of the metal part.
  • the metal piece may be an end cover of the motor, or a casing of the motor, or the like.
  • the metal part is an end cover, the end cover is located on one axial side of the rotor core.
  • the metal part is a casing
  • the casing is arranged around the outer circumference of the rotor core.
  • the rotor iron core has a shaft hole, and the shaft hole is arranged on the rotor iron core along the axial direction, and the rotating shaft is penetrated in the shaft hole, and the rotating shaft is connected with the rotor iron core.
  • the rotating shaft includes two opposite exposed ends, which are respectively a first exposed end and a second exposed end.
  • the motor can be used as a driving motor, and the first exposed end is used for connecting with the vehicle.
  • Loads such as wheels are connected so that the wheels can be driven to rotate when the rotating shaft rotates to realize power output.
  • the conductive bearing is sleeved on the rotating shaft.
  • the conductive bearing is an additional bearing independent of the slewing bearing of the motor.
  • the conductive bearing plays the role of connecting the rotating shaft and the elastic conductive member. Further, the conductive bearing is sleeved on the second exposed end, that is to say, the conductive bearing is sleeved on the non-load end of the rotating shaft.
  • the elastic conductive part is located on the axial side of the conductive bearing away from the rotor core, and at least part of the elastic conductive part is arranged between the conductive bearing and the metal part, that is, there is an axial extension between the conductive bearing and the metal part.
  • At least part of the elastic conductive part is located in the gap, one axial side of the elastic conductive part is in contact with the conductive bearing, and the other axial side of the elastic conductive part is in contact with the metal part, which not only enables the processing of the elastic conductive part itself It is more convenient, and at the same time, it can also reduce the difficulty of assembling the elastic conductive part.
  • the elastic conductive part generates a pressing force through its own elastic deformation, so that it can be tightly sandwiched between the conductive bearing and the metal part, and realizes close contact with the conductive bearing and the metal part respectively, thereby reducing the size of the metal part, elastic conductive part and
  • the contact resistance between the conductive bearings acts as a guide to the shaft current, prevents the shaft current from corroding the slewing bearing of the motor, and prolongs the service life of the conductive bearing and the slewing bearing.
  • the elastic force that can be generated by the elastic conductive member is within a certain range, that is to say, when the force on the conductive bearing is different, the elastic conductive member can be adaptively adjusted according to the force transmitted by the conductive bearing, that is, it can be adjusted through the elastic conductive member.
  • the pressing force generated by its own deformation achieves a force balance with the conductive bearing to ensure that the conductive bearing is evenly stressed.
  • the conductive bearing will move axially and radially with the shaft, due to the elastic conductive member
  • the self-adaptive ability can keep the elastic conductive parts in stable contact with the conductive bearing and the metal part respectively, and will not be unable to contact effectively because the conductive bearing is shifted by the rotating shaft, so as to ensure the conductive connection.
  • the elastic conductive member can also prevent the conductive bearing from being damaged due to stress concentration, and prevent the conductive bearing from being abnormally worn due to partial load.
  • the present application can realize the anti-corrosion effect only by sheathing the conductive bearing and the elastic conductive part on the rotating shaft, and has the advantages of simple structure, reasonable layout, low cost and simple assembly.
  • the conductive bearing includes a bearing inner ring and a bearing outer ring sleeved outside the bearing inner ring, and there is a gap between the bearing inner ring and the bearing outer ring.
  • the conductive bearing also includes two sealing rings, and the two sealing rings are respectively sealed between the two ends of the bearing outer ring and the bearing inner ring along the axial direction (that is, the thickness direction), that is, the two sealing rings are respectively sealed in the axial direction of the conductive bearing. (that is, the thickness direction) on both sides of the gap, the steel ball of the conductive bearing is sealed between the two sealing rings, the bearing inner ring and the bearing outer ring, and the gap between the bearing inner ring and the bearing outer ring is filled with conductive grease.
  • the shaft current can leak to the inner ring of the conductive bearing through the rotating shaft, and then quickly conduct to the outer ring of the bearing through the conductive grease, so as to ensure that the conductive bearing has excellent electrical conductivity. Due to the existence of conductive grease, the resistance between the inner ring of the bearing and the outer ring of the bearing is reduced, and it has good electrical conductivity. Compared with the slewing bearing, the electrical resistance of the conductive bearing is smaller. Specifically, the conductive bearing is a deep groove ball bearing.
  • the conductive bearing plays the role of conducting the shaft current, and the selection of a conductive bearing with a smaller size series can obtain better high-speed performance and conductivity. Therefore, the size of the conductive bearing is much smaller than that of the slewing bearing. Further, the conductive bearing is installed at the tail end of the rotating shaft (the non-load end, the second exposed end), and the conductive bearing is in close contact with the elastic conductive member and is electrically connected.
  • the elastic conductive part is arranged between the metal part and the conductive bearing in a compressed state, and the elastic conductive part will compress the conductive bearing and the metal part against the reverse force generated by the elastic conductive part in order to return to its original shape.
  • the connection mode between the elastic conductive part and the metal part can be directly connected, or the elastic conductive part can be indirectly connected to the metal part through other conductive parts, that is, the axial current can be directly guided through the elastic conductive part To the metal parts, it can also be transmitted indirectly through other conductive parts.
  • the grounding of the metal parts can realize the discharge of the shaft current to the earth through the metal parts.
  • the motor provided by the present application can not only be used in the field of vehicles, as a driving motor of the vehicle, but also in the field of home appliances, such as air conditioners, clothes processing equipment, cooking appliances, etc.
  • the elastic conductive part and the metal part there may be a buffer space between the elastic conductive part and the metal part, and/or there may be a buffer space between the elastic conductive part and the conductive bearing.
  • the conductive part of the elastic part is squeezed by the conductive bearing and the metal part, so that it is stably installed in the gap between the two, and realizes the close contact between the conductive bearing, the elastic conductive part and the metal part, thereby forming a good conductive path.
  • the buffer space formed between the elastic conductive part and the metal part and/or the conductive bearing can improve assembly reliability on the one hand and adapt to changing installation environments.
  • the installation gap between the metal part and the conductive bearing is There is a standard height in the axial direction. In the actual assembly process, there may be a slight deviation in the axial height of the installation gap, and the buffer space allows further deformation of the elastic conductive part in the axial direction to adapt to different installation environments.
  • the conductive bearing on the rotating shaft will also have axial displacement.
  • the elastic conductive member will be further compressed, and the elastic
  • the buffer space between the conductive part and the conductive bearing on both sides of the axial direction and the metal part will provide the possibility for further compression, which can provide a buffer margin for the axial movement of the conductive bearing and prevent the conductive bearing and the metal part from
  • the elastic conductive parts between them are in the state of maximum compression, and cannot bear the further compression that may exist during the operation of the motor, avoiding the axial hard contact between the conductive bearings, elastic conductive parts and metal parts, reducing the conductive bearings, elastic conductive
  • the wear rate of parts and metal parts can be improved, and the service life of motor products can be improved.
  • the elastic conductive member includes a connecting portion and at least two elastic portions, the at least two elastic portions are respectively connected to the connecting portion, and each elastic portion of the at least two elastic portions is larger than the connecting portion The twists and turns extend to form a buffer space.
  • the elastic conductive member includes a connecting portion and an elastic portion
  • the connecting portion can provide structural support for the elastic portion, that is, the connecting portion can play a supporting role.
  • the elastic portion extends meanderingly relative to the connecting portion, specifically, the elastic portion extends at least axially in a meandering manner compared to the connecting portion, and a buffer space may be formed between the elastic portion and the conductive bearing and/or between the metal parts. Under the extrusion action of the conductive bearing and the metal part, the elastic part can be deformed compared with the connecting part, so as to provide a reverse elastic force, so that the elastic conductive part is clamped between the conductive bearing and the metal part.
  • the elastic part is protrudingly arranged compared with the connecting part, that is, the elastic part is exposed beyond the connecting part, so as to facilitate the contact between the elastic part and the conductive bearing and/or the metal piece.
  • the contact positions of the elastic conductive part, the conductive bearing and the metal part may be different.
  • the elastic part is in contact with the conductive bearing, and the connecting part is in contact with the metal part.
  • the elastic part is in contact with the metal part, and the connecting part is in contact with the conductive bearing.
  • the protruding directions of the elastic parts are different. It is possible that the elastic parts in one protruding direction are in contact with the conductive bearing, and the elastic parts in the other protruding direction are in contact with the metal parts. In this design, There is no contact between the connecting part and the conductive bearing and the metal parts.
  • the main function of the connecting part is to connect the supporting elastic part.
  • the connecting part can be made to have a wave shape in the axial direction, so the connecting part can also have a certain
  • the deformable effect of the elastic part further increases the deformability of the elastic conductive part as a whole on the basis of the elastic part.
  • the number of elastic parts is at least two, and at least two elastic parts are uniformly arranged on the connecting part.
  • the elastic portion evenly arranged on the connecting portion can balance the stress on the conductive bearing, and prevent the conductive bearing from being unbalanced due to the arrangement of the elastic conductive member, causing the uneven force to deviate and causing aggravated wear.
  • one of the at least two elastic parts protrudes toward the conductive bearing to form a first elastic protrusion, the first elastic protrusion is in contact with the conductive bearing, and the other of the at least two elastic parts
  • the elastic portion is recessed away from the conductive bearing to form a first elastic recess, and the first elastic recess is in contact with the metal piece.
  • the number of elastic parts is at least two, and the at least two elastic parts include a first elastic protrusion and a second elastic protrusion, and the first elastic protrusion protrudes toward the conductive bearing compared with the connecting part,
  • the first elastic protrusion is in contact with the conductive bearing
  • the second protrusion is recessed away from the conductive bearing compared to the connecting portion
  • the second elastic protrusion is in contact with the metal piece
  • the first elastic protrusion has a direction The tendency of the metal parts to move, at this time the volume of the first buffer space will decrease.
  • the second elastic protrusion will be compressed by the force of the metal piece.
  • the second elastic protrusion has a tendency to move towards the conductive bearing, and the volume of the second buffer space will decrease at this time.
  • the elastic conductive part When the first elastic protruding part and the second elastic protruding part respectively move in opposite directions relative to the exposed direction of the connecting part, further compression possibilities are provided for the elastic conductive part, so that during the operation of the motor, the metal parts, The elastic conductive parts and conductive bearings are still in flexible contact, which reduces the wear rate of conductive bearings, elastic conductive parts and metal parts, and improves the service life of motor products.
  • the number of first elastic protrusions is at least two, the number of first elastic recesses is at least two, and any one of the at least two first elastic protrusions is located at least two between two adjacent ones of the first elastic recesses.
  • the number of first elastic protrusions is at least two, the number of first elastic recesses is also at least two, and one first elastic protrusion is located between two adjacent second elastic protrusions, that is, the first elastic protrusion is located between two adjacent second elastic protrusions.
  • the first elastic protrusion and the second elastic protrusion are arranged one by one at intervals.
  • the elastic conductive part it has a first axial side facing the conductive bearing and also includes a second axial side facing the metal part.
  • first elastic protrusions For the first axial side, there are a plurality of first elastic protrusions arranged at intervals to communicate with The conductive bearing contact, for the second shaft side, has the same number of second elastic protrusions to contact the metal piece, so as to provide substantially equal elastic support for the conductive bearing and the metal piece.
  • the first elastic convex part is subjected to the force exerted by the conductive bearing, and the adjacent first elastic concave part is subjected to the opposite force exerted by the metal part, that is, the elastic conductive part itself
  • the direction of the force is varied, which prevents the possible fatigue fracture of the elastic conductive parts due to the excessive concentration of the force in the same direction, and improves the structural stability of the elastic conductive parts.
  • At least two elastic parts protrude toward the direction close to the conductive bearing to form a second elastic protrusion, the at least two second elastic protrusions are in contact with the conductive bearing respectively, and the connecting part is in contact with the metal contact.
  • each of the at least two elastic parts protrudes toward the conductive bearing to form a second elastic protrusion
  • the second elastic protrusion protrudes toward the conductive bearing compared with the connecting part
  • the second elastic protrusion protrudes toward the conductive bearing.
  • the second elastic protrusion has a tendency to move towards the metal part, and the volume of the buffer space decreases. , so as to provide further compression possibility for the elastic conductive part, so that the elastic conductive part and the conductive bearing are in flexible contact, reduce the wear rate between the conductive bearing and the elastic conductive part, and improve the service life of the motor product.
  • the connecting part not only plays the role of supporting and connecting the second elastic protrusion, but also plays the role of contacting and connecting with the metal part, so as to realize the conductive connection between the rotating shaft, the conductive bearing, the conductive connecting part and the metal part.
  • the elastic portions in the elastic conductive member are all protruding in the same direction, so that the processing difficulty and assembly difficulty of the elastic conductive member can be reduced.
  • the connecting part is a connecting curved part
  • the number of connecting curved parts is at least two
  • any one of the at least two connecting curved parts is adjacent to at least two elastic parts The two elastic parts are connected.
  • At least two elastic parts can be connected through at least two connecting curved parts, wherein any one of the multiple connecting curved parts is connected between two adjacent elastic parts, that is, at least two The connecting curved part and at least two elastic parts are connected end to end to form an elastic conductive part.
  • at least two elastic parts may protrude towards the direction close to the conductive bearing to form an elastic convex part, and may also be recessed away from the conductive bearing to form an elastic concave part. That is, any combination of the first elastic convex portion/the first elastic concave portion/the second elastic convex portion can be connected between at least two connecting curved portions.
  • the elastic part includes a first elastic convex part and a first elastic concave part
  • the first elastic convex part and the first elastic concave part are respectively connected between the two connecting curved parts
  • the elastic conductive part is bent in a wave shape as a whole structure
  • the first elastic convex portion protruding toward the conductive bearing can be regarded as a wave crest
  • the first elastic concave portion concave away from the conductive bearing can be regarded as a wave valley
  • the connecting curved portion can be regarded as a transition portion between the wave peak and the wave valley.
  • the elastic force generated by the first elastic convex part and the first elastic concave part can be transmitted to the conductive bearing and the metal part, so that the elastic conductive part is clamped between the metal part and the conductive bearing, so that the contact resistance between the two becomes smaller, It makes it easier for the shaft current to be transmitted to the metal parts through the conductive bearing and the elastic conductive part, so as to realize the grounding and significantly reduce the corrosion of the slewing bearing.
  • the elastic part includes second elastic protrusions, each second elastic protrusion is connected between two adjacent connecting curved parts.
  • the connecting part is a connecting ring, and at least two second elastic protrusions are respectively arranged on the outer periphery of the connecting part.
  • connection part is a connection ring
  • the outer contour of the connection ring is circular
  • the connection ring includes an outer periphery
  • at least two second elastic protrusions are respectively arranged on the outer periphery of the connection part.
  • the second elastic protrusion includes opposite connecting ends and contact ends
  • the connecting ends are arranged on the outer periphery of the connecting portion
  • the contact ends extend at least axially to contact with the conductive bearing
  • the conductive bearing will be subjected to some radial eccentric load force.
  • the conductive bearing will transmit at least part of the radial eccentric load force to the elastic conductive member.
  • the connecting end extending in the radial direction can play a very good buffering role, preventing the second elastic protrusion from being broken due to the impact of the radial force.
  • each of the at least two second elastic protrusions extends along the outer periphery of the connecting portion to form an extension section, and the at least two second elastic protrusions The extension sections of two adjacent second elastic protrusions are close to and connected with each other.
  • the second elastic protrusion is connected to the contact end, and the connection end is arranged on the outer periphery of the connecting part.
  • the extension sections of the two adjacent second elastic protrusions are close to and connected to each other, that is to say, for each second elastic protrusion, the contact area with the connecting portion is effectively increased, and at the same time, the two adjacent second elastic protrusions There is also an interconnection between the two elastic protrusions, so that the structural stability of the second elastic protrusion can be better.
  • the adjacent second elastic protrusion will Both the connecting part and the connecting part can provide structural support for it, prolonging the service life of the elastic conductive part.
  • At least two elastic parts are respectively recessed in a direction away from the conductive bearing to form a second elastic concave part, the at least two second elastic concave parts are in contact with the metal part, and the connecting part is in contact with the conductive bearing.
  • each of the at least two elastic parts is recessed toward away from the conductive bearing to form a second elastic recess, and the second elastic recess is recessed away from the conductive bearing compared with the connecting part, and the second elastic recess is in contact with the metal piece
  • the second elastic concave part has a tendency to move towards the conductive bearing, and the volume of the buffer space is reduced, thereby providing an elastic conductive part.
  • the connecting part not only plays the role of supporting and connecting the second elastic concave part, but also plays the role of contacting and connecting with the conductive bearing, so as to realize the conductive connection between the rotating shaft, the conductive bearing, the conductive connecting piece and the metal piece.
  • the elastic portions in the elastic conductive member are all protruding in the same direction, so that the processing difficulty and assembly difficulty of the elastic conductive member can be reduced.
  • the elastic conductive member has multiple buffer cavities.
  • the elastic conductive part not only forms a buffer space with the conductive bearing and/or metal parts, but at the same time, the elastic conductive part itself has multiple buffer cavities.
  • the buffer space And multiple buffer cavities can provide reverse elastic force for elastic conductive parts, and multiple buffer cavities can provide elastic reserve for elastic conductive parts, so that elastic conductive parts can be successfully assembled in the installation gap when faced with variable installation gaps , so that the elastic conductive part is compressed between the conductive bearing and the metal part, and is in close contact with the conductive bearing and the metal part, reducing the contact resistance between the metal part, the elastic conductive part and the conductive bearing, and guiding the shaft current It can prevent the shaft current from corroding the slewing bearing of the motor, and prolong the service life of the conductive bearing and slewing bearing.
  • the installation gap between the metal part and the conductive bearing has a standard height in the axial direction. In the actual assembly process, there may be a slight deviation in the axial height of the installation gap, which leads to variable installation gaps.
  • the inside of the elastic conductive member is honeycomb-shaped, which not only ensures its own structural strength and is not prone to breakage due to external force, but also provides further compression possibilities for the elastic conductive member.
  • the elastic conductive member includes a plurality of elastic pieces stacked in the axial direction, each elastic piece in the plurality of elastic pieces includes a third elastic convex portion and a third elastic concave portion, and the third elastic convex portion faces the conductive
  • the bearing protrudes, the third elastic concave part is connected to the third elastic convex part, and the third elastic concave part is recessed away from the conductive bearing, wherein the plurality of elastic pieces include a first elastic piece and a second elastic piece located on the side of the first elastic piece away from the conductive bearing, and the second elastic piece is located on the side away from the conductive bearing.
  • One of the multiple buffer cavities is provided between the third elastic convex portion of the first elastic piece and the third elastic concave portion of the second elastic piece, and the third elastic concave portion of the first elastic piece is connected with the third elastic convex portion of the second elastic piece.
  • the elastic conductive member includes a plurality of axially stacked elastic pieces, each elastic piece has the same structure, and there is a rotation angle between two adjacent elastic pieces, so that two adjacent elastic pieces are stacked in a dislocation manner.
  • each elastic sheet includes a connected third elastic protrusion and a third elastic recess, the third elastic protrusion protrudes toward the conductive bearing, the third elastic recess is recessed away from the conductive bearing, the third elastic protrusion and the third elastic recess
  • There is a one-to-one correspondence between the numbers of the third elastic protrusions the number of the third elastic protrusions is at least one, the number of the third elastic recesses is at least one, and the third elastic protrusions and the third elastic recesses are connected end to end to form an elastic piece.
  • each third elastic concave part is connected between two adjacent third elastic concave parts.
  • the whole shrapnel has a wave-shaped curved structure
  • the third elastic convex part can be regarded as a wave crest
  • the third elastic concave part can be regarded as a wave trough.
  • the axial direction from the conductive bearing to the metal part includes the first shrapnel and the second shrapnel, that is, in the direction from top to bottom, the third elastic protrusion (peak) of the first shrapnel ) corresponds to the third elastic concave portion (trough) of the second elastic piece below it and forms a buffer cavity, the third elastic concave portion (trough) of the first elastic piece and the third elastic convex portion of the second elastic piece below it (wave crests) are connected, thereby realizing reliable connection performance between the first elastic piece and the second elastic piece.
  • the junction of the connecting portion and the elastic portion is rounded and transitioned.
  • the elastic conductive member is in contact with the bearing outer ring of the conductive bearing.
  • the elastic conductive part is in contact with the outer ring of the conductive bearing, and the outer ring of the bearing does not rotate with the rotating shaft, so there is no relative displacement between the elastic conductive part and the outer ring of the bearing, thereby reducing the friction between the elastic conductive part and the metal part. wear rate and prolong service life.
  • the elastic conductive part does not contact the bearing inner ring of the conductive bearing. Since the bearing inner ring rotates synchronously with the rotating shaft, if the elastic conductive part contacts the bearing inner ring and the bearing outer ring at the same time, it will cause the bearing inner ring to get stuck. The problem of not being able to rotate.
  • a part of the outer ring of the bearing is in contact with the elastic conductive member.
  • a part of the outer ring of the bearing is in contact with the elastic conductive part, that is, a part of the outer ring of the bearing is used for conductive contact, and is in extrusion contact with the elastic conductive part, and the other part of the outer ring of the bearing is exposed, and is in contact with the elastic conductive part.
  • the parts do not touch, which can reduce the wear of the outer ring of the bearing.
  • the elastic conductive part is located on the axial side of the conductive bearing away from the rotor core, the elastic conductive part is in contact with the axial end surface of one side of the bearing outer ring, and the elastic conductive part is not in contact with the peripheral side of the bearing outer ring .
  • an escape opening is provided on the elastic conductive member, and a part of the rotating shaft can extend into the escape opening.
  • the elastic conductive part also includes a relief port, which is set on the elastic conductive part, and the relief port can avoid the rotating shaft and the bearing inner ring of the conductive bearing.
  • the bearing inner ring and the rotating shaft have an interference fit, and the bearing inner ring will The shafts rotate synchronously.
  • the outer ring of the bearing is in contact with the elastic conductive part, and the position of the outer ring of the bearing and the elastic conductive part is static and will not rotate with the movement of the rotating shaft.
  • the avoidance port is axially penetratingly provided on the elastic conductive member.
  • the elastic conductive member includes at least two elastic parts arranged on the connecting part, and the avoidance opening is arranged on the connecting part, and at this time, the connecting part has a ring structure.
  • the elastic conductive part includes at least two connecting curved parts and at least two elastic parts, one connecting curved part is connected between two adjacent elastic parts, and at least two connecting curved parts and at least two elastic parts are connected to form an escape opening .
  • the elastic conductive member has a hollow structure, so that the contact between the elastic conductive member and the rotating shaft and the inner ring of the conductive bearing can be avoided. If the elastic conductive member has a non-hollow structure, the shaft of the inner ring of the conductive bearing To the end, the rotating shaft will be in contact with the elastic conductive member, which will generate frictional torque and interfere with the rotation of the rotating shaft.
  • the avoidance port is used to avoid the rotating shaft and the inner ring of the bearing.
  • the rotation process of the rotating shaft includes normal rotation and axial movement. In the case of axial movement, the rotating shaft and the inner ring of the bearing can extend into the escape port.
  • the avoidance opening includes a circular opening.
  • the escape port can be a circular opening, which is suitable for the rotation tendency of the bearing inner ring and the rotating shaft in the conductive bearing. Move to make better avoidance.
  • the elastic conductive part is a sheet metal part.
  • the elastic conductive part when the elastic conductive part includes the elastic part and the connecting part, the elastic part and the connecting part can be formed by sheet metal stamping and bending process.
  • the part is specifically an integrated structure. Because the mechanical properties of the integrated structure are good, the connection strength between the connecting part and multiple elastic parts can be improved.
  • the connecting part and the elastic parts can be made integrally and mass-produced to improve Improve product processing efficiency and reduce product processing costs.
  • the integral structure of the connecting part and the elastic part the integrity of the elastic conductive part is improved, the number of parts is reduced, the installation process is reduced, the installation efficiency is improved, and the installation of the elastic conductive part is more efficient. For convenience and reliability.
  • the motor further includes a conductive connection part, the conductive connection part is connected to the metal part, and at least part of the elastic conductive part is located between the conductive connection part and the conductive bearing.
  • the motor also includes conductive connectors, which are respectively connected to the metal part and the elastic conductive part, that is, in order to realize the drainage of the shaft current, the shaft current at the elastic conductive part is not directly connected to the metal part, Instead, the conductive connectors are used to lead to the metal parts.
  • the conductive connector is an aluminum alloy casting, specifically, the conductive connector has a plate-like structure, the conductive connector is installed on the end cover of the motor, and the conductive connector is fully in contact with the end cover.
  • the conductive connector includes a board body and a mounting part, and the board body is connected to the metal part.
  • the installation part is arranged on the plate body toward the rotating shaft, and the installation part includes installation positions, and a part of the elastic conductive part and the conductive bearing are respectively arranged at the installation positions.
  • the conductive connector includes a board body and a mounting part, and the board body is connected to the metal part.
  • the installation part is arranged on the board body toward the rotating shaft, specifically, the installation part can be arranged on the board body along an axial extension.
  • the installation part includes an installation position, at least a part of the elastic conductive part is arranged at the installation position, so as to facilitate the installation and positioning of the elastic conductive part.
  • the board body and the installation part are of an integrated structure, and the mechanical properties of the integrated structure are good, so the connection strength between the board body and the installation part can be improved.
  • the board body and the installation part can be integrally manufactured for mass production , in order to improve the processing efficiency of the product and reduce the processing cost of the product.
  • the integrity of the conductive connector is improved, the number of parts is reduced, the installation process is reduced, the installation efficiency is improved, and the installation of the conductive connector is more efficient. For convenience and reliability.
  • the mounting part includes a supporting part and an abutting part, and the supporting part is arranged on the board body.
  • the abutment part is connected to the axial end of the support part, and the installation position is set between the abutment part and the support part; wherein, the bearing outer ring of the conductive bearing is in contact with the abutment part, and the elastic conductive part is arranged on the abutment part, the support part part and the conductive bearing.
  • the installation part includes a support part and an abutment part, and the support part extends along the axial direction and is arranged on the plate body.
  • the abutment part is connected to the axial end of the support part, and the installation position is located between the abutment part and the support part.
  • the support part has a ring structure, and the abutment part also has a ring structure.
  • the inner diameter of the support part is smaller than the inner diameter of the abutment part. That is, the installation position appears as an annular step position (annular counterbore).
  • the outer ring of the bearing is arranged on a part of the inner wall of the abutment part, wherein the counterbore and the conductive bearing are concentric structures .
  • An annular installation gap is formed between another part of the inner wall of the abutting portion, the support portion and the conductive bearing, and the installation gap is used to accommodate at least a part of the elastic conductive member.
  • the elastic conductive member is fully in contact with the conductive bearing and the mounting part through elastic deformation, thereby forming a good conductive path.
  • the shaft current includes two conductive paths, one of which passes through the rotating shaft, conductive bearings, elastic conductive parts, conductive connecting parts and metal parts in sequence. The second is to pass through the rotating shaft, the slewing bearing and the end cover in turn. And because the resistance of the first conductive path is smaller than that of the second conductive path, that is, the shaft current will be preferentially transmitted from the first conductive path, preventing the shaft current from corroding the slewing bearing and prolonging the service life of the slewing bearing.
  • the supporting part can form an axial limit for the conductive bearing and the elastic conductive part
  • the abutting part can form a radial limit for the conductive bearing and the elastic conductive part, which is also convenient for the elastic conductive part and the elastic conductive part to be connected under the premise of ensuring conductive contact. Positioning installation of conductive bearings.
  • the abutment portion includes an abutment wall, a shaft side wall and a guide portion, the abutment wall faces the conductive bearing, the shaft side wall is away from the support portion, and the guide portion is arranged on the abutment wall and the shaft side wall junction.
  • the abutment portion includes an abutment wall, a shaft side wall and a guide portion, the abutment wall faces the elastic conductive member and the conductive bearing, the bearing outer ring of the conductive bearing abuts against a part of the abutment wall, and the elastic conductive member can In contact with another part of the abutting wall, the contact area between the elastic conductive part and the conductive connecting part can be increased, and the reliability of the conductive path can be improved.
  • the shaft side wall is set away from the supporting part, that is, the shaft side wall is an axial end wall facing the rotor core, and the guide part is arranged at the joint between the abutting wall and the shaft side wall.
  • the guide portion can facilitate the assembly of the elastic conductive member and the conductive bearing, reducing the difficulty of assembly. It is worth noting that the guide portion may be a guide arc, a guide slope, or the like.
  • the support part has a hollow cavity opening toward the rotating shaft.
  • the support part has a hollow cavity that opens toward the rotating shaft.
  • the hollow cavity can prevent the conductive connector from contacting the inner ring of the conductive bearing and the rotating shaft. If the conductive connector has a non-hollow structure, the axial direction of the inner ring of the conductive bearing The tip/shaft may interfere with the conductive connection, creating a frictional torque that interferes with the rotation of the conductive bearing.
  • the metal part includes an end cover, the end cover is arranged on one axial side of the rotor core, and at least a part of the elastic conductive member is arranged between the end cover and the conductive bearing.
  • the metal part includes an end cap, which is provided on one axial side of the rotor core.
  • the end cover is disposed close to the second exposed end of the rotating shaft, that is, the end cover is a rear end cover.
  • At least a part of the elastic conductive part is arranged between the end cover and the conductive bearing, and the position of the end cover is relatively close to the conductive bearing, so that the shaft current can be led out quickly, and the material cost of the elastic conductive part and the conductive connecting part can also be saved, so that The layout of the conductive path is more rationalized.
  • the inner diameter of the conductive bearing is D1
  • the resistance of the inner and outer rings of the conductive bearing is R1.
  • the motor also includes a slewing bearing, which is sleeved on the rotating shaft.
  • the slewing bearing is located on the side of the conductive bearing away from the end cover.
  • the inner diameter of the slewing bearing is D2
  • the resistance of the inner and outer rings of the slewing bearing is R2, where D1 ⁇ D2, R1 ⁇ R2.
  • the resistance between the metal part and the slewing bearing is greater than the resistance between the metal part and the conductive bearing, so that the shaft current can preferentially flow out from the path where the conductive bearing is located.
  • the slewing bearing plays the role of slewing and supporting the rotating shaft.
  • the resistance between the inner and outer rings of the slewing bearing is greater than the resistance of the inner and outer rings of the conductive bearing, and the inner diameter of the slewing bearing is larger than that of the conductive bearing, which further facilitates the connection between the shaft current and the metal parts through the conductive bearing, prevents the shaft current from corroding the slewing bearing, and prolongs the life of the bearing. service life.
  • a vehicle including the motor provided by any of the above-mentioned designs.
  • the vehicle provided by the present application includes the motor provided by any of the above-mentioned designs, so it has all the beneficial effects of the motor, and will not be repeated here.
  • the vehicle may be a new energy vehicle.
  • new energy vehicles include pure electric vehicles, extended-range electric vehicles, hybrid vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc.
  • Fig. 1 shows a schematic structural diagram of a motor according to an embodiment of the present application
  • Fig. 2 shows a partial enlarged view of the motor at A according to an embodiment of the present application shown in Fig. 1;
  • Fig. 3 shows one of the structural schematic diagrams of the elastic conductive member of the motor according to the embodiment of the present application
  • Fig. 4 shows the second structural schematic diagram of the elastic conductive member of the motor according to the embodiment of the present application
  • Fig. 5 shows the third structural schematic diagram of the elastic conductive member of the motor according to the embodiment of the present application.
  • FIG. 6 shows the fourth schematic structural view of the elastic conductive member of the motor according to the embodiment of the present application.
  • Fig. 7 shows the fifth schematic structural view of the elastic conductive member of the motor according to the embodiment of the present application.
  • Fig. 8 shows the sixth structural schematic diagram of the elastic conductive member of the motor according to the embodiment of the present application.
  • Fig. 9 shows the seventh schematic structural view of the elastic conductive member of the motor according to the embodiment of the present application.
  • Fig. 10 shows the eighth structural schematic diagram of the elastic conductive member of the motor according to the embodiment of the present application.
  • Fig. 11 shows the ninth schematic structural view of the elastic conductive member of the motor according to the embodiment of the present application.
  • Fig. 12 shows a schematic structural diagram of a motor according to an embodiment of the present application.
  • Fig. 13 shows a partial enlarged view of the motor at B according to an embodiment of the present application shown in Fig. 12;
  • Fig. 14 shows one of the structural schematic diagrams of the elastic conductive member of the motor according to an embodiment of the present application
  • Fig. 15 shows the second structural schematic diagram of the elastic conductive member of the motor according to an embodiment of the present application
  • Fig. 16 shows a schematic structural diagram of a motor according to another embodiment of the present application.
  • Fig. 17 shows a partial enlarged view of the motor at C according to an embodiment of the present application shown in Fig. 16;
  • Fig. 18 shows a schematic structural diagram of an elastic conductive member of a motor according to another embodiment of the present application.
  • Fig. 19 shows an enlarged view of part of the structure of the motor according to yet another embodiment of the present application.
  • Fig. 20 shows one of the structural schematic diagrams of the elastic conductive member of the motor according to yet another embodiment of the present application
  • Fig. 21 shows the second structural schematic diagram of the elastic conductive member of the motor according to yet another embodiment of the present application.
  • Fig. 22 shows the third schematic structural view of the elastic conductive member of the motor according to yet another embodiment of the present application.
  • Fig. 23 shows a schematic structural diagram of an elastic conductive member of a motor according to yet another embodiment of the present application.
  • Fig. 24 shows a schematic structural diagram of a motor according to another embodiment of the present application.
  • Fig. 25 shows a partial enlarged view of the motor at D according to another embodiment of the present application shown in Fig. 24;
  • Fig. 26 shows one of the structural schematic diagrams of the elastic conductive member of the motor according to another embodiment of the present application.
  • Fig. 27 shows a cross-sectional view of the structure of the elastic conductive member of the motor according to another embodiment of the present application.
  • connection part 151 connection part, 151a first connection part, 151b second connection part,
  • stator 191 stator core, 192 stator winding.
  • a motor 100 and a vehicle provided according to some embodiments of the present application are described below with reference to FIGS. 1 to 27 .
  • a motor 100 is provided. As shown in FIG. 1 and FIG.
  • the core 120 is disposed on one side of the metal member, and the rotor core 120 includes a shaft hole.
  • the rotating shaft 130 is connected with the rotor core 120, and the rotating shaft 130 is passed through the shaft hole.
  • the conductive bearing 140 is sleeved on the rotating shaft 130 . At least part of the elastic conductive member 150 is disposed between the conductive bearing 140 and the metal member.
  • the motor 100 provided in the present application includes a metal part, a rotor core 120 , a rotating shaft 130 , a conductive bearing 140 and an elastic conductive part 150 , wherein the rotor core 120 is arranged on one side of the metal part.
  • the metal piece may be the end cover 111 of the motor 100 , or the casing 112 of the motor 100 or the like.
  • the end cover 111 is located on one axial side of the rotor core 120 .
  • the casing 112 is disposed around the outer side of the rotor core 120 in the circumferential direction.
  • the rotor core 120 has a shaft hole, and the shaft hole penetrates the rotor core 120 along the axial direction, and the rotating shaft 130 is penetrated in the shaft hole, and the rotating shaft 130 is connected with the rotor core 120 .
  • the rotating shaft 130 includes two opposite exposed ends, which are respectively a first exposed end and a second exposed end.
  • the motor 100 when the motor 100 is applied to a vehicle, the motor 100 can be used as a driving motor, and the first exposed end is used for It is connected with loads such as wheels of the vehicle to drive the wheels to rotate when the rotating shaft 130 rotates to realize power output.
  • the conductive bearing 140 is sheathed on the rotating shaft 130 .
  • the conductive bearing 140 is an additional bearing independent of the slewing bearing 180 of the motor 100 , and plays a role of connecting the rotating shaft 130 and the elastic conductive member 150 . Further, the conductive bearing 140 is sleeved on the second exposed end. At least part of the elastic conductive part 150 is arranged between the conductive bearing 140 and the metal part. The elastic conductive part 150 generates a pressing force through its own elastic deformation, thereby closely contacting the conductive bearing 140, thereby reducing the contact between the elastic conductive part 150 and the conductive bearing.
  • the contact resistance between 140 acts as a guide for the shaft current, prevents the shaft current from corroding the slewing bearing 180 of the motor 100, prolongs the service life of the conductive bearing 140 and the slewing bearing 180, and at the same time, through the elastic conductive member 150 itself
  • the compression force generated by the deformation is used to achieve force balance with the conductive bearing 140 and ensure that the conductive bearing 140 is evenly stressed.
  • the conductive bearing 140 will move axially and radially with the rotating shaft 130, due The self-adaptive ability of the elastic conductive member 150 can make the elastic conductive member 150 contact with the conductive bearing 140 stably all the time, so that the conductive bearing 140 will not be unable to contact effectively due to the movement of the conductive bearing 140 , ensuring the conductive connection. At the same time, it can also prevent the conductive bearing 140 from being damaged due to stress concentration, and prevent the conductive bearing 140 from being abnormally worn due to eccentric load force.
  • the present application can realize the anti-corrosion effect only by sheathing the conductive bearing 140 and the elastic conductive member 150 on the rotating shaft 130 , and has the advantages of simple structure, reasonable layout, low cost, and simple assembly.
  • the motor 100 further includes a stator 190 that surrounds the rotor core 120 .
  • the stator 190 includes a stator core 191 and a stator winding 192 .
  • the stator winding 192 is wound on the stator core 191 .
  • the working principle of the motor 100 is known to those skilled in the art, and will not be described in detail here.
  • the conductive bearing 140 includes an inner ring and an outer ring sleeved outside the inner ring, and there is a gap between the inner ring and the outer ring.
  • the conductive bearing 140 also includes two sealing rings, and the two sealing rings are respectively sealed between the two ends of the outer ring and the inner ring along the axial direction (that is, the thickness direction), that is, the two sealing rings are respectively sealed on the conductive bearing 140 along the axial direction ( That is, the gap on both sides of the thickness direction), the steel ball of the conductive bearing 140 is sealed between the two sealing rings, the inner ring and the outer ring, and the gap between the inner ring and the outer ring is filled with conductive grease, and the axial current can pass through
  • the rotating shaft 130 leaks to the inner ring of the conductive bearing 140 , and then quickly transfers to the outer ring through the conductive grease, so as to ensure that the conductive bearing 140 has excellent electrical conductivity. Due to the existence of the conductive grease, the resistance between the inner ring and the outer
  • the conductive bearing 140 is hardly subjected to axial and radial loads.
  • the conductive bearing 140 is a deep groove ball bearing.
  • the conductive bearing 140 plays a role of conducting the shaft current, and the conductive bearing 140 with a smaller size series can obtain better high-speed performance and conductive performance. Therefore, the size of the conductive bearing 140 is much smaller than the size of the slew bearing 180 . Further, the conductive bearing 140 is installed at the tail end (the second exposed end) of the rotating shaft 130 , and the conductive bearing 140 is in close contact with the elastic conductive member 150 and is electrically connected.
  • the elastic conductive member 150 is disposed between the metal member and the conductive bearing 140 in a compressed state, and the elastic conductive member 150 will compress the conductive bearing 140 against the reverse force generated by the elastic conductive member 150 in order to return to its original shape.
  • the connection mode between the elastic conductive part 150 and the metal part can be directly connected, or the elastic conductive part 150 can be indirectly connected to the metal part through other conductive parts, that is to say, the axial current can pass through the elastic conductive part 150 It is directly guided to metal parts, and can also be passed indirectly through other conductive parts.
  • the grounding of the metal parts can realize the discharge of the shaft current to the earth through the metal parts.
  • the motor 100 provided by the present application can not only be used in the field of vehicles as a driving motor of the vehicle, but can also be used in the field of home appliances, such as air conditioners, laundry processing equipment, cooking appliances, etc.
  • an embodiment of the present application discloses a motor 100, which includes a grounded metal piece, a conductive bearing 140 sleeved on the rotating shaft 130, and the conductive bearing 140 is used to guide the shaft of the motor 100 during operation. current, preventing the shaft current from flowing to the slewing bearing 180 of the motor 100 .
  • the elastic conductive part 150 is provided.
  • the elastic conductive part 150 can realize the clamping fit with the conductive bearing 140 according to the elastic force that can be generated by itself, so as to reduce the
  • the contact resistance between the elastic conductive member 150 and the conductive bearing 140 guides the shaft current, prevents the shaft current from corroding the slewing bearing 180 of the motor 100 , and prolongs the service life of the conductive bearing 140 and the slewing bearing 180 .
  • the elastic conductive member 150 there may be two types, one is partial deformation to generate elastic force, and the other is overall deformation to generate elastic force.
  • the elastic conductive member 150 when the partial deformation of the elastic conductive member 150 generates elastic force, the elastic conductive member 150 includes a connecting portion 151 that plays a supporting role and a plurality of elastic portions 152 disposed on the connecting portion 151, and the connecting portion 151 can be used to support the elastic portion 152 , which can also be conveniently installed with other components, and the plurality of elastic parts 152 can be deformed to clamp the conductive bearing 152 .
  • the elastic conductive member 150 when the overall deformation of the elastic conductive member generates elastic force, the elastic conductive member 150 includes a plurality of connecting parts 151 and a plurality of elastic parts 152, the connecting parts 151 and the elastic parts 152 are connected end to end, and both the connecting parts 151 and the elastic parts 152 are deformable components to provide elasticity.
  • the elastic conductive member Under the combined effect of the connecting portion 151 and the elastic portion 152 , the elastic conductive member can achieve a maximum clamping force, and the clamping effect between it and the conductive bearing 140 is even stronger.
  • both the connecting portion 151 and the elastic portion 152 are of meandering structure, both of which can protrude away from the direction of the central axis at the same time, and their bending degrees are different.
  • the connecting portion 151 protrudes toward the central axis, and the elastic portion 152 protrudes away from the central axis.
  • the connecting portion 151 can be in contact with the outer peripheral wall of the conductive bearing 140, and the elastic portion 152 can be directly connected to the metal piece, or through other components indirect connection.
  • the elastic conductive member 150 includes a connection portion 151 and a plurality of elastic portions 152, and the plurality of elastic portions 152 are respectively connected to the connection portion 151, and each elastic portion 152
  • the elastic part 152 extends in a meandering manner and is disposed between the conductive bearing 140 and the metal part.
  • the elastic conductive member 150 includes a connection part 151 and a plurality of elastic parts 152, the connection part 151 is used as a supporting structure, and the plurality of elastic parts 152 are respectively arranged on the connection part 151, and each elastic part 152 extends in a zigzag manner, thereby Make itself have a large amount of elastic deformation.
  • the elastic portion 152 can at least protrude toward a direction away from the central axis, that is, each elastic portion 152 at least protrudes outward, and the elastic portion 152 is sandwiched between the conductive bearing 140 and the metal piece, and the elastic portion 152 can be relatively
  • the connecting portion 151 is deformed.
  • the outwardly protruding elastic portion 152 can easily contact the metal parts and the conductive bearing 140 , and can also provide a certain deformation space for its own deformation.
  • the elastic conductive member 150 is a stamped and bent sheet metal member.
  • the connecting part 151 and a plurality of elastic parts 152 are of an integrated structure, and the connecting part 151 and a plurality of elastic parts 152 are specifically of an integrated structure. Because the mechanical properties of the integrated structure are good, the connection part 151 and a plurality of elastic parts 152 can be improved. In addition, the connection part 151 and the plurality of elastic parts 152 can be integrally manufactured for mass production, so as to improve the processing efficiency of the product and reduce the processing cost of the product.
  • the integrity of the elastic conductive member 150 is improved, the number of parts is reduced, the installation process is reduced, the installation efficiency is improved, and the elasticity is improved.
  • the installation of the conductive member 150 is more convenient and reliable.
  • the elastic portion 152 includes a first contact portion 152a and a second contact portion 152b, the first contact portion 152a is connected to the connection portion 151, and the first contact portion 152a faces away from the central axis protruding.
  • the second contact portion 152b is connected to the first contact portion 152a , the second contact portion 152b protrudes toward the direction close to the central axis, and at least a part of the second contact portion 152b is in contact with the conductive bearing 140 .
  • the elastic portion 152 includes a first contact portion 152a and a second contact portion 152b, wherein the first contact portion 152a is connected to the connection portion 151, and the first contact portion 152a protrudes in a direction away from the central axis, that is, The first contact portion 152a protrudes outward, and the outer surface of the first contact portion 152a can be connected to a metal piece, or the outer surface of the first contact portion 152a can be connected to other conductive components.
  • the first contact portion 152a has a first end and a second end away from each other, the first end of the first contact portion 152a is connected to the connecting portion 151, and the second end of the first contact portion 152a is connected to the second contact portion 152b.
  • the second contact portion 152b protrudes toward the direction close to the central axis, that is, the second contact portion 152b protrudes inward, so that at least a part of the second contact portion 152b contacts the outer ring of the conductive bearing 140 .
  • the first contact portion 152a and the second contact portion 152b are S-shaped as a whole, the outwardly protruding first contact portion 152a is connected to metal parts or other conductive components, and the inwardly protruding second contact portion 152b is connected to the conductive bearing 140. Outer ring contact, the first contact portion 152a and the second contact portion 152b protruding in opposite directions can facilitate the elastic conductive member 150 to be pressed against the conductive bearing 140, and provide more bias load force for the conductive bearing 140 during use.
  • a good buffer is used to balance the force on the conductive bearing 140 to achieve a good conduction state.
  • the elastic conductive member 150 includes a connecting portion 151 and a plurality of elastic portions 152, the plurality of elastic portions 152 are respectively connected to the connecting portion 151, and each elastic portion 152 protrudes at least in a direction away from the central axis, and the elastic portion 152 is arranged on Between the conductive bearing 140 and the metal part.
  • the elastic conductive member 150 includes a connecting portion 151 and a plurality of elastic portions 152, the elastic portion 152 is used as a supporting structure, and the plurality of elastic portions 152 are respectively arranged on the connecting portion 151, and each elastic portion 152 is at least towards the direction away from the center.
  • the direction of the axis protrudes, that is, each elastic portion 152 protrudes outward at least, the elastic portion 152 is interposed between the conductive bearing 140 and the metal component, and the elastic portion 152 can be deformed relative to the connecting portion 151 .
  • the elastic part 152 protruding outwards can be conveniently contacted with the metal parts and the conductive bearing 140, and can also provide a certain deformation space for its own deformation.
  • the elastic conductive member 150 is a stamped and bent sheet metal member.
  • the connecting part 151 and a plurality of elastic parts 152 are of an integrated structure, and the connecting part 151 and a plurality of elastic parts 152 are specifically of an integrated structure. Because the mechanical properties of the integrated structure are good, the connection part 151 and a plurality of elastic parts 152 can be improved. In addition, the connection part 151 and the plurality of elastic parts 152 can be integrally manufactured for mass production, so as to improve the processing efficiency of the product and reduce the processing cost of the product.
  • the integrity of the elastic conductive member 150 is improved, the number of parts is reduced, the installation process is reduced, the installation efficiency is improved, and the elasticity is improved.
  • the installation of the conductive member 150 is more convenient and reliable.
  • the elastic portion 152 includes a first contact portion 152a and a second contact portion 152b.
  • the first end of the first contact portion 152a is bent and connected to the connecting portion 151.
  • the first contact portion The second end of 152a extends axially.
  • the second contact portion 152b is connected to the second end of the first contact portion 152a, and the second contact portion 152b is curled in a direction away from or protruding from the central axis.
  • the elastic portion 152 includes a first contact portion 152a and a second contact portion 152b.
  • the first end of the first contact portion 152a is bent and connected to the connecting portion 151.
  • the connection is in a soft transition shape, so as to avoid stress concentration at the connection between the two. On the one hand, it prevents the sheet metal from breaking during processing, and on the other hand, it also provides a greater degree of freedom for the deformation process of the elastic part 152 relative to the connecting part 151 .
  • the second end of the first contact portion 152 a extends axially to form an axial inner surface facing the central axis, and the axial inner surface contacts the outer ring of the conductive bearing 140 so as to be in close contact with the conductive bearing 140 .
  • the second contact portion 152b is connected to the second end of the first contact portion 152a, and the second contact portion 152b is curled in a direction away from or protruding from the central axis, and the curled second contact portion 152b can strengthen the overall structure of the elastic portion 152 strength, and increase the service life of the elastic conductive member 150 . Specifically, when the second contact portion 152b is curled in a direction away from the central axis, the second contact portion 152b is in contact with the conductive connection member 170/metal member.
  • the elastic portion 152 is disposed on the outer peripheral wall of the connecting portion 151 .
  • the outer contour of the connecting portion 151 is circular, and the connecting portion 151 includes a peripheral wall.
  • the first contact portion 152a of each elastic portion 152 starts from the outer peripheral wall of the connecting portion 151. Since the elastic conductive member 150 is a sheet metal bending part, limited by the processing method, the first contact portion 152a must be in the radial direction. There is a certain extension in the direction. During the rotation of the rotating shaft 130, it is unavoidable that the conductive bearing 140 will be subjected to some radial bias load. Compared with other end surfaces, the first contact portion 152a extending in the radial direction can play a good buffering role. , to prevent the elastic portion 152 from being broken due to the impact of radial force.
  • each elastic portion 152 is located on one axial side of the connecting portion 151 .
  • each elastic portion 152 is located on one axial side of the connecting portion 151, that is, at least a portion of the elastic portion 152 protrudes from the connecting portion 151 in the axial direction, that is, the connecting portion 151 and the elastic
  • the portion 152 can form an installation position for installing the conductive bearing 140 , and the connecting portion 151 not only plays the role of disposing the elastic portion 152 , but also can provide support for the conductive bearing 140 .
  • the rotating shaft 130 is provided with a limiting step
  • the conductive bearing 140 is sleeved on the rotating shaft 130, the axial first end of the conductive bearing 140 abuts against the limiting step, and the axial second end of the conductive bearing 140 abuts against the limiting step.
  • the installation position formed by the elastic part 152 and the connecting part 151 In the installation position formed by the elastic part 152 and the connecting part 151 .
  • the elastic portion 152 located on one side of the connecting portion 151 in the axial direction will not be disturbed by the connecting portion 151 when deformed, but can directly transmit the elastic force to the conductive bearing 140, thereby ensuring the connection between the elastic portion 152 and the conductive bearing 140. Clamp fit.
  • the elastic conductive member 150 includes a plurality of connecting parts 151 and a plurality of elastic parts 152, and any elastic part 152 in the plurality of elastic parts 152 is connected to Between the two connecting portions 151 , each elastic portion 152 protrudes in a direction away from or protruding from the central axis.
  • the elastic conductive member 150 includes a plurality of connecting parts 151 and a plurality of elastic parts 152, any one elastic part 152 of the plurality of elastic parts 152 is connected between two connecting parts 151, that is, the plurality of elastic parts 152
  • the elastic conductive member 150 is connected end to end with a plurality of connecting parts 151, and each elastic part 152 protrudes in a direction away from or protruding from the central axis, that is, the elastic part 152 has a wave-like curved structure, and the elastic part 152 in a curved structure can be deformed , so as to be clamped on the conductive bearing 140 .
  • the connecting portion 151 located between the two elastic portions 152 can be straight or bent, and the connecting portion 151 can not only function as a connection, but also be in contact with the conductive bearing 140 to generate the elastic portion 152.
  • the elastic force of the conductive bearing 140 is transmitted to the outer peripheral wall of the conductive bearing 140, so that the elastic conductive member is clamped and arranged on the conductive bearing 140, so that the contact resistance between the two is small, so that the shaft current is easier to pass through the conductive bearing 140, and the elastic conduction
  • the parts are transmitted to the metal parts, and then the grounding is realized, which significantly reduces the corrosion of the slewing bearings.
  • the connecting portion 151 when the connecting portion 151 is straight, the connecting portion 151 can realize the supporting function, and can also transmit the force generated by the elastic portion 152 .
  • At least one connecting portion 151 among the plurality of connecting portions 151 is curved.
  • the connecting portion 151 itself can also be deformed to generate elastic force. Then, for the conductive bearing 140, the clamping force it bears does not only come from the elastic portion 152 , can also come from the curved connecting portion 151 , in a limited space, the clamping force can be maximized to ensure the clamping effect between the elastic conductive member and the conductive bearing 140 .
  • each elastic part 152 in the plurality of elastic parts 152 faces away from the central axis
  • the direction protrudes to form a first elastic portion 152c
  • each of the plurality of connecting portions 151 bends in a direction away from the central axis to form a first connecting portion 151a.
  • Each first connecting portion 151 a includes a wall surface facing the central axis as an arc surface, and the arc surface is in contact with the conductive bearing 140 .
  • each elastic portion 152 protrudes in a direction away from the central axis, forming a first elastic portion 152c protruding outward, and each connecting portion 151 bends in a direction away from the central axis, that is, each connecting portion 151 faces
  • the outer bending forms the first connecting portion 151a
  • the first connecting portion 151a includes an inner arc surface.
  • each elastic part 152 in the plurality of elastic parts 152 faces the direction of the central axis
  • the second elastic portion 152 d is protruded, and the second elastic portion 152 d includes a contact portion facing the central axis, and the contact portion is in contact with the conductive bearing 140 .
  • Each connecting portion 151 of the plurality of connecting portions 151 is bent in a direction away from the central axis to form a first connecting portion 151a.
  • each elastic portion 152 of the plurality of elastic portions 152 protrudes toward the direction of the central axis to form a second elastic portion 152d, that is, the second elastic portion 152d protrudes inwardly
  • the second elastic portion 152d includes The contact portion of the axis, the contact portion is in contact with the conductive bearing 140, each of the plurality of connecting portions 151 is bent in a direction away from the central axis to form a first connecting portion 151a, that is, the first connecting portion 151a protrudes outward,
  • the first connecting portion 151 a includes an arc surface away from the central axis, and the arc surface can be in contact with the metal piece or the conductive connecting piece 170 .
  • this embodiment further explains the specific structure of the elastic portion 152 and the connecting portion 151, and each elastic portion 152 in the plurality of elastic portions 152 protrudes in a direction away from the central axis.
  • a first elastic portion 152c is formed, and each of the plurality of connecting portions 151 protrudes toward a direction close to the central axis to form a second connecting portion 151b.
  • Each second connecting portion 151b includes a contact end facing the central axis, and the contact end abuts against the outer periphery of the conductive bearing 140 .
  • each connecting portion 151 of the plurality of connecting portions 151 protrudes toward the direction close to the central axis, that is, each connecting portion 151 bends and protrudes inward to form the second connecting portion 151b.
  • Each second connecting portion 151b includes a contact end facing the central axis, that is, each second connecting portion 151b includes an inwardly protruding contact end, and the contact end abuts against the outer periphery of the conductive bearing 140 .
  • the elastic force generated by the elastic portion 152 and the second connecting portion 151 b is transmitted to the outer wall of the conductive bearing 140 through the contact end.
  • connection parts 151 and the plurality of elastic parts 152 are arranged at uniform intervals, so as to ensure that the conductive bearing 140 is balanced in force, and will not be tilted due to an unbalanced load.
  • the connecting portion 151 is in the form of an arc segment, and a plurality of arc segments are connected at intervals to the outwardly protruding elastic portion 152 , and both the arc segment and the elastic portion 152 can provide a deformation amount.
  • the arc section can be in contact with the outer ring of the conductive bearing 140
  • the elastic part 152 can be in contact with the conductive connecting part 170
  • the connecting part 151 and the elastic part 152 are elastically deformed as a whole, so that the elastic conductive part 150 is sandwiched in the compressed state. between the conductive bearing 140 and the conductive connector 170 .
  • each elastic portion 152 protrudes in a direction away from the central axis, and the arc segment may bend in a direction away from the central axis, or in a direction close to the central axis. That is to say, the elastic portion 152 and the arc section are in a corrugated structure as a whole.
  • the elastic conductive member 150 further includes a release port 153 , and the release port 153 is provided on any one of the plurality of connecting parts 151 .
  • the elastic conductive member 150 further includes a release port 153, the release port 153 is provided on any one of the plurality of connecting parts 151, the release port 153 can provide the elastic conductive member 150 as a whole with a degree of freedom in the circumferential direction, Excessive deformation and stress due to the deformation of the elastic portion 152 and the connecting portion 151 can be avoided, and the release opening 153 can provide a larger deformation range to release the stress during the deformation process of the elastic portion 152 and the connecting portion 151 .
  • release port 153 is provided through the axial direction of the elastic conductive member.
  • the release port 153 is provided through the axial direction of the elastic conductive member 150, so that the excessive stress and excessive deformation of the elastic conductive member 150 can be relieved through the partial release port 153 at the corresponding position. release, thereby improving the fatigue safety factor of the elastic conductive member 150 .
  • the release port 153 is located at the center of the connecting portion 151 .
  • the release port 153 is provided through the connection part 151 in the axial direction, so that the connection part 151 with the release port 153 is the target connection part, and the two elastic parts connected to the target connection part are the first side elastic parts. portion and the second side elastic portion.
  • the release port 153 is located at the center of the target connection part, the distance from the release port 153 to the first side elastic part and the distance from the release port 153 to the second side elastic part are equal, that is, the first side elastic part and the second side elastic part
  • the end portions close to each other have connecting structures of equal length, so as to ensure the reliable supporting performance of the elastic portion on the first side and the connecting portion on the second side.
  • the release port 153 is arranged close to one elastic portion 152, then for the elastic portion 152, the structure of the elastic conductive member 150 is asymmetric due to the absence of one side connecting portion 151. At this time, multiple elastic portions 152 act The resultant force of the clamping force on the conductive bearing 140 is not zero, which easily causes the conductive bearing 140 to be unbalanced and wear.
  • this embodiment describes the arrangement of multiple elastic parts 152.
  • the elastic conductive member 150 includes a connecting part 151 and multiple elastic parts 152.
  • the multiple elastic parts 152 are respectively connected to the connecting part 151. Connected, each elastic portion 152 protrudes at least in a direction away from the central axis, and the elastic portion 152 is disposed between the conductive bearing 140 and the metal component. A plurality of elastic portions 152 are evenly spaced.
  • the evenly spaced elastic portions 152 can make the conductive bearing 140 receive a clamping force with a resultant force of zero, preventing the conductive bearing 140 from being unbalanced due to the arrangement of the elastic conductive member 150 , causing the uneven force to deviate and causing aggravated wear.
  • the elastic conductive member 150 when the elastic conductive member 150 includes a plurality of elastic portions 152 and one connecting portion 151, for example, when the number of elastic portions 152 is three, the structural size of the three elastic portions 152 All are the same, the three elastic portions 152 are evenly distributed on the connecting portion 151 , that is, the interval between two adjacent elastic portions 152 among the three elastic portions 152 is 120°.
  • the three elastic parts 152 are clamped on the outer ring of the conductive bearing 140 through elastic deformation.
  • the three elastic portions 152 are evenly distributed on the connecting portion 151, and because the size of the structures is the same, that is, the clamping force generated by the three elastic portions 152 is the same, so that the three elastic portions 152 have the same effect on the conductive bearing.
  • the resultant force of 140 is zero, which can prevent the three elastic parts 152 from producing a resultant force along the radial direction of the conductive bearing 140 due to structural asymmetry, thereby adversely affecting the life of the conductive bearing 140.
  • the elastic force generated by the elastic part 152 makes the elastic The portion 152 is fully in contact with the conductive bearing 140, thereby reducing the contact resistance and forming a good conduction path.
  • each group contains two elastic parts 152
  • each group of elastic parts 152 is ring-shaped.
  • the connecting portion 151 of the structure is distributed symmetrically along the diameter direction, and the two sets of elastic portions 152 are evenly distributed, that is, the angle between two adjacent elastic portions 152 is 90°, that is, the connecting lines of the two sets of elastic portions 152 are perpendicular to each other.
  • the resultant force of the two groups of elastic parts 152 on the conductive bearing 140 is zero, avoiding the two groups due to structural asymmetry.
  • the set of elastic parts 152 generates a resultant force along the radial direction of the conductive bearing 140 , thereby adversely affecting the life of the conductive bearing 140 .
  • the purpose of the elastic force generated by the elastic piece is only to fully contact with the conductive bearing 140 , thereby reducing the contact resistance and forming a good conduction path.
  • the elastic conductive member 150 includes a plurality of connecting parts 151 and a plurality of elastic parts 152, and any elastic part 152 in the plurality of elastic parts 152 is connected between two connecting parts 151, Each elastic portion 152 protrudes in a direction away from or toward the central axis. A plurality of elastic portions 152 are evenly spaced.
  • the evenly spaced elastic portions 152 can make the conductive bearing 140 receive a clamping force with a resultant force of zero, preventing the conductive bearing 140 from being unbalanced due to the arrangement of the elastic conductive member 150 , causing the uneven force to deviate and causing aggravated wear.
  • the elastic conductive member 150 includes a plurality of elastic parts 152 and a plurality of connecting parts 151
  • the number of elastic parts 152 is three
  • the number of connecting parts 151 is three
  • the number of release openings 153 is one.
  • the three elastic parts 152 are connected alternately with the three connecting parts 151
  • the release port 153 is provided at the center of one connecting part 151 .
  • the three elastic portions 152 are evenly distributed between the three connecting portions 151 , that is, the interval angle between two adjacent elastic portions 152 among the three elastic portions 152 is 120°.
  • the number of elastic parts 152 is four
  • the number of connecting parts 151 is four
  • the angle between two adjacent elastic parts 152 is 90°.
  • the motor 100 further includes an escape opening 160 disposed on the elastic conductive member 150 , and at least a part of the conductive bearing 140 is located in the avoidance opening.
  • the elastic conductive member 150 also includes an avoidance port 160, which is provided on the elastic conductive member 150.
  • the avoidance port 160 can avoid the inner ring of the conductive bearing 140, and the inner ring is in interference fit with the rotating shaft 130.
  • the circle rotates synchronously with the rotating shaft 130 .
  • the outer ring of the conductive bearing 140 is in contact with the elastic conductive member 150 , and the outer ring and the elastic conductive member 150 are stationary and will not rotate with the movement of the rotating shaft 130 .
  • the escape port 160 is axially penetratingly disposed on the elastic conductive member 150 .
  • the elastic conductive member 150 includes a plurality of elastic portions 152 disposed on the connecting portion 151, and the avoidance opening 160 is disposed on the connecting portion 151.
  • the connecting portion 151 has a ring-shaped structure.
  • the elastic conductive member 150 includes a plurality of connecting parts 151 and a plurality of elastic parts 152, one connecting part 151 is connected between two adjacent elastic parts 152, and a plurality of connecting parts 151 and a plurality of elastic parts 152 are connected to form an escape port 160.
  • the elastic conductive member 150 has a hollow structure, so that the contact between the elastic conductive member 150 and the inner ring of the conductive bearing 140 can be avoided.
  • the axial end of the inner ring will be in contact with the elastic conductive member 150 to generate frictional torque and interfere with the rotation of the conductive bearing 140 .
  • junction of the connecting portion 151 and the elastic portion 152 has a rounded transition.
  • the motor 100 also includes a conductive connector 170 that can be connected to a metal part, and at least part of the compression of the elastic conductive member 150 is located between the conductive connector 170 and the conductive bearing 140 .
  • the motor 100 also includes a conductive connecting piece 170, which is respectively connected to the metal piece and the elastic conductive piece 150. That is to say, in order to realize the drainage of the shaft current, the shaft current at the elastic conductive piece 150 is not It is directly connected to the metal part, but guided to the metal part through the conductive connecting part 170.
  • the conductive connecting part 170 By setting the conductive connecting part 170, the assembly process can be simplified and the difficulty of preparation can be reduced under the premise of ensuring the conductive connection.
  • the conductive connector 170 is an aluminum alloy casting. Specifically, the conductive connector 170 has a plate-like structure. The conductive connector 170 is installed on the end cover 111 of the motor 100. Pass.
  • the conductive connector 170 includes a board body 171 and a mounting portion 172 , and the board body 171 can be connected to a metal piece.
  • the mounting portion 172 is disposed on the plate body 171 toward the rotating shaft 130 , the mounting portion 172 includes a mounting position, and at least a part of the elastic conductive member 150 is disposed at the mounting position.
  • the conductive connector 170 includes a board body 171 and a mounting portion 172, and the board body 171 can be connected with a metal piece.
  • the mounting portion 172 is disposed on the plate body 171 toward the rotating shaft 130 , that is, the mounting portion 172 is axially extended and disposed on the plate body 171 .
  • the installation portion 172 includes an installation location, at least a part of the elastic conductive member 150 is disposed at the installation location, so as to facilitate the installation and positioning of the elastic conductive member 150 .
  • the plate body 171 and the installation part 172 are of an integral structure.
  • the mounting portion 172 includes a supporting portion 172 a and an abutting portion 172 b, and the supporting portion 172 a is disposed on the board body 171 .
  • the abutting portion 172b is connected to the axial end of the supporting portion 172a, and the installation position is disposed between the abutting portion 172b and the supporting portion 172a, and the elastic conductive member 150 is respectively in contact with the abutting portion 172b and the supporting portion 172a.
  • the mounting portion 172 includes a supporting portion 172 a and an abutting portion 172 b, and the supporting portion 172 a is axially extended and disposed on the plate body 171 .
  • the abutment portion 172b is connected to the axial end of the support portion 172a, and the installation position is set between the abutment portion 172b and the support portion 172a.
  • the support portion 172a has a ring structure, and the abutment portion 172b also has a ring structure.
  • the inner diameter is larger than the inner diameter of the abutting portion 172b, that is, the installation position is an annular step position (annular counterbore).
  • the counterbore and the conductive bearing 140 have a concentric structure.
  • An annular installation space is formed between them, and the installation space is used for accommodating at least a part of the elastic conductive member 150 .
  • the elastic conductive member 150 fully contacts the conductive bearing 140 and the mounting portion 172 through elastic deformation, thereby forming a good conductive path.
  • the shaft current includes two conductive paths, one of which passes through the rotating shaft 130 , the conductive bearing 140 , the elastic conductive element 150 , the conductive connecting element 170 and the metal element in sequence.
  • the second is to pass through the rotating shaft 130 , the slewing bearing 180 and the end cover 111 in sequence.
  • the resistance of the first conductive path is smaller than that of the second conductive path, that is, the shaft current will be preferentially transmitted through the first conductive path, preventing the shaft current from corroding the slewing bearing 180 and prolonging the service life of the slewing bearing 180 .
  • the support portion 172a can constitute an axial limit for the conductive bearing 140 and the elastic conductive member 150
  • the abutment portion 172b can constitute a radial limit for the conductive bearing 140 and the elastic conductive member 150.
  • the abutment portion 172b includes an abutment wall 1721 , a shaft side wall 1722 and a guide portion, and the abutment wall 1721 faces toward the elastic conductive member.
  • the shaft side wall 1722 faces away from the support portion.
  • the guiding portion is disposed at the junction of the abutting wall 1721 and the shaft side wall 1722 .
  • the abutting portion 172b includes an abutting wall 1721 , a shaft side wall 1722 and a guide portion, the abutting wall 1721 faces the elastic conductive member, and the elastic conductive member can be in contact with the abutting wall 1721 .
  • the shaft side wall 1722 is disposed away from the support portion.
  • the guiding portion is disposed at the junction of the abutting wall 1721 and the shaft side wall 1722 .
  • the guide portion may be a guide arc, guide slope 1723 and the like.
  • the guide portion includes a guide slope 1723
  • the axial depth h of the guide slope 1723 is greater than 0 mm and less than or equal to 5 mm
  • the angle between the guide slope 1723 and the tangent plane where the abutting wall 1721 is located is greater than 0° and less than or equal to 30°
  • the limiting effect of the abutting portion 172b on the elastic conductive member will not be weakened.
  • the supporting portion 172a has a hollow cavity opening toward the rotating shaft 130 .
  • the support portion 172a has a hollow cavity that opens toward the rotating shaft 130.
  • the hollow cavity can prevent the conductive connector 170 from contacting the inner ring of the conductive bearing 140. If the conductive connector 170 is not hollow, the conductive bearing 140 The axial end of the inner ring will be in contact with the conductive connecting piece 170 to generate frictional torque and interfere with the rotation of the conductive bearing 140 .
  • the metal part includes an end cap 111 disposed on one axial side of the rotor core 120 , and at least a part of the elastic conductive member 150 is disposed between the end cap 111 and the conductive bearing 140 .
  • the metal member includes an end cover 111 disposed on one axial side of the rotor core 120 .
  • the end cover 111 is disposed close to the second exposed end of the rotating shaft 130 , that is, the end cover 111 is a rear end cover 111 .
  • At least a part of the elastic conductive member 150 is arranged between the end cover 111 and the conductive bearing 140.
  • the end cover 111 is relatively close to the conductive bearing 140, so that the shaft current can be led out quickly, and the elastic conductive member 150 and the conductive connection can also be saved.
  • the material cost of the component 170 is reduced, so that the layout of the conductive path is more reasonable.
  • the motor 100 also includes a rotary bearing 180, which is set on the rotating shaft 130.
  • the rotary bearing 180 is located on the side of the conductive bearing 140 away from the end cover 111.
  • the inner diameter of the rotary bearing 180 is D2, and the resistance of the inner and outer rings of the rotary bearing 180 is R2. , where, D1 ⁇ D2, R1 ⁇ R2.
  • the resistance between the metal part and the slewing bearing 180 is greater than the resistance between the metal part and the conductive bearing 140 , so that the shaft current can preferentially flow out from the path where the conductive bearing 140 is located.
  • the slewing bearing 180 plays a role of rotatably supporting the rotating shaft 130 .
  • the resistance between the inner and outer rings of the slewing bearing 180 is greater than the resistance of the inner and outer rings of the conductive bearing 140, and the inner diameter of the slewing bearing 180 is larger than the inner diameter of the conductive bearing 140, which further facilitates the connection of the shaft current to the metal parts through the conductive bearing 140 and prevents the shaft current from affecting the slewing bearing. 180% corrosion, prolong the service life of the bearing.
  • the motor 100 includes a metal part, a rotor core 120, a rotating shaft 130, a conductive bearing 140 and an elastic conductive part 150, the rotor core 120 is arranged on one side of the metal part, and the rotor core 120 includes a shaft hole .
  • the rotating shaft 130 is connected with the rotor core 120, and the rotating shaft 130 is passed through the shaft hole.
  • the conductive bearing 140 is sleeved on the end of the rotating shaft 130 . At least part of the elastic conductive member 150 is disposed between the conductive bearing 140 and the metal member.
  • the first structure of the elastic conductive member 150 is that the elastic conductive member 150 includes a connecting portion 151 and a plurality of elastic portions 152, the plurality of elastic portions 152 are respectively connected to the connecting portion 151, and each elastic portion 152 faces at least in a direction away from the central axis Protruding, the elastic part 152 is disposed between the conductive bearing 140 and the metal part.
  • the embodiment of the elastic part 152 may be as follows: the elastic part 152 includes a first contact part 152a and a second contact part 152b, the first contact part 152a is connected to the connecting part 151, and the first contact part 152a protrudes in a direction away from the central axis. out.
  • the second contact portion 152b is connected to the first contact portion 152a , the second contact portion 152b protrudes toward the direction close to the central axis, and at least a part of the second contact portion 152b is in contact with the conductive bearing 140 .
  • the elastic part 152 includes a first contact part 152a and a second contact part 152b, the first end of the first contact part 152a is bent and connected to the connecting part 151, and the second end of the first contact part 152a extends axially.
  • the second contact portion 152b is connected to the second end of the first contact portion 152a, and the second contact portion 152b is curled in a direction away from the central axis.
  • the elastic portion 152 is disposed on the outer peripheral wall of the connecting portion 151 , and the radially extending first contact portion 152a can play a good buffering role, preventing the elastic portion 152 from breaking due to radial force.
  • the second structure of the elastic conductive member 150 is that the elastic conductive member 150 includes a plurality of connecting parts 151 and a plurality of elastic parts 152, and any elastic part 152 in the plurality of elastic parts 152 is connected between the two connecting parts 151, each The first elastic portion 152 protrudes in a direction away from or toward the central axis.
  • At least one connecting portion 151 among the plurality of connecting portions 151 is curved.
  • the connecting portion 151 can be bent in a direction away from the central axis to form the first connecting portion 151a, or the connecting portion 151 can be bent toward the central axis to form the first connecting portion 151a.
  • a connecting portion 151b is curved.
  • the protruding direction of the elastic portion 152 at least includes away from the central axis and toward the central axis.
  • its bending direction at least includes away from the central axis and toward the central axis.
  • the first elastic part 152c protrudes away from the central axis
  • the second elastic part 152d protrudes toward the central axis
  • bends away from the central axis A combination of the first connecting portion 151a and the second connecting portion 151b bent toward the central axis.
  • the elastic conductive member 150 further includes a release opening 153 , and the release opening 153 is disposed on any one of the plurality of connection portions 151 .
  • the release opening 153 can provide a degree of freedom in the circumferential direction for the elastic conductive member 150 as a whole, and can avoid excessive deformation and stress caused by deformation of the elastic portion 152 and the connecting portion 151 .
  • the release port 153 is located at the center of the connecting portion 151 .
  • each elastic conductive member 150 has a plurality of elastic portions 152 , that is, the plurality of elastic portions 152 are evenly spaced.
  • the evenly spaced elastic portions 152 can make the conductive bearing 140 receive a clamping force with a resultant force of zero, preventing the conductive bearing 140 from being unbalanced due to the arrangement of the elastic conductive member 150 , causing the uneven force to deviate and causing aggravated wear.
  • the motor 100 also includes a conductive connecting piece 170 that can be connected to a metal piece, and at least part of the compression of the elastic conductive piece 150 is located between the conductive connecting piece 170 and the conductive bearing 140 .
  • a conductive connecting piece 170 that can be connected to a metal piece, and at least part of the compression of the elastic conductive piece 150 is located between the conductive connecting piece 170 and the conductive bearing 140 .
  • a vehicle including the motor 100 provided by any of the above-mentioned designs.
  • the vehicle provided in the present application includes the motor 100 provided by any of the above-mentioned designs, and therefore has all the beneficial effects of the motor 100 , which will not be repeated here.
  • the vehicle may be a new energy vehicle.
  • new energy vehicles include pure electric vehicles, extended-range electric vehicles, hybrid vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc.
  • the motor 100 includes a metal part, a rotor core 120 , a rotating shaft 130 , a conductive bearing 140 and an elastic conductive part 150 , wherein the rotor core 120 is disposed on one side of the metal part.
  • the metal piece may be the end cover 111 of the motor 100 , or the casing 112 of the motor 100 or the like.
  • the end cover 111 is located on one axial side of the rotor core 120 .
  • the casing 112 is disposed around the outer side of the rotor core 120 in the circumferential direction.
  • the rotor core 120 has a shaft hole, and the shaft hole is arranged on the rotor core 120 along the axial direction, and the rotating shaft 130 is penetrated in the shaft hole, and the rotating shaft 130 is connected with the rotor core 120, and the rotating shaft 130 includes two opposite exposed ends. , are respectively the first exposed end and the second exposed end, and the first exposed end is used to connect with loads such as wheels of the vehicle, so as to drive the wheels to rotate when the rotating shaft 130 rotates to realize power output.
  • the conductive bearing 140 is sleeved on the end of the rotating shaft 130 .
  • the conductive bearing 140 is an additional bearing independent of the slewing bearing 180 of the motor 100 , and plays a role of connecting the rotating shaft 130 and the elastic conductive member 150 .
  • the conductive bearing 140 is sleeved on the second exposed end. At least part of the elastic conductive part 150 is arranged between the conductive bearing 140 and the metal part. The elastic conductive part 150 generates a pressing force through its own elastic deformation, thereby closely contacting the conductive bearing 140, thereby reducing the contact between the elastic conductive part 150 and the conductive bearing.
  • the contact resistance between 140 acts as a guide for the shaft current, prevents the shaft current from corroding the slewing bearing 180 of the motor 100, prolongs the service life of the conductive bearing 140 and the slewing bearing 180, and at the same time, through the elastic conductive member 150 itself
  • the compression force generated by the deformation is used to achieve force balance with the conductive bearing 140 and ensure that the conductive bearing 140 is evenly stressed.
  • the conductive bearing 140 will move axially and radially with the rotating shaft 130, due The self-adaptive ability of the elastic conductive member 150 can make the elastic conductive member 150 contact with the conductive bearing 140 stably all the time, so that the conductive bearing 140 will not be unable to contact effectively due to the movement of the conductive bearing 140 , ensuring the conductive connection. At the same time, it can also prevent the conductive bearing 140 from being damaged due to stress concentration, and prevent the conductive bearing 140 from being abnormally worn due to eccentric load force.
  • the present application can realize the anti-corrosion effect only by sheathing the conductive bearing 140 and the elastic conductive member 150 on the rotating shaft 130 , and has the advantages of simple structure, reasonable layout, low cost, and simple assembly.
  • a motor 100 is provided, as shown in FIG. 12 , FIG. 16 and FIG. , wherein the metal part 110 is grounded, the rotor core 120 is arranged on one side of the metal part 110, the rotor core 120 includes a shaft hole, the rotating shaft 130 is connected with the rotor core 120, the rotating shaft 130 is installed in the shaft hole, and the conductive bearing 140 Sleeved on the rotating shaft 130 , the elastic conductive member 150 is located on the axial side of the conductive bearing 140 away from the rotor core 120 , at least a part of the elastic conductive member 150 is in contact with the conductive bearing 140 and the metal member 110 respectively.
  • the motor 100 provided in this application includes a metal part 110 , a rotor core 120 , a rotating shaft 130 , a conductive bearing 140 and an elastic conductive part 150 , wherein the rotor core 120 is arranged on one side of the metal part 110 .
  • the metal part 110 may be the end cover 111 of the motor 100 , or the casing 112 of the motor 100 , or the like.
  • the metal part 110 is an end cover 111
  • the end cover 111 is located on one axial side of the rotor core 120 .
  • the casing 112 is disposed around the outer side of the rotor core 120 in the circumferential direction.
  • the rotor core 120 has a shaft hole, and the shaft hole penetrates the rotor core 120 along the axial direction, and the rotating shaft 130 is penetrated in the shaft hole, and the rotating shaft 130 is connected with the rotor core 120 .
  • the rotating shaft 130 includes two opposite exposed ends, which are respectively a first exposed end and a second exposed end.
  • the motor 100 when the motor 100 is applied to a vehicle, the motor 100 can be used as a driving motor, and the first exposed end is used for It is connected with loads such as wheels of the vehicle, so that when the rotating shaft 130 rotates, the wheels can be driven to rotate to realize power output.
  • the conductive bearing 140 is sleeved on the rotating shaft 130 .
  • the conductive bearing 140 is an additional bearing independent of the slewing bearing 180 of the motor 100 .
  • the conductive bearing 140 plays a role of connecting the rotating shaft 130 and the elastic conductive member 150 . Further, the conductive bearing 140 is sleeved on the second exposed end, that is, the conductive bearing 140 is sleeved on the non-loaded end of the rotating shaft 130 .
  • the elastic conductive member 150 is located on the axial side of the conductive bearing 140 away from the rotor core 120, and at least part of the elastic conductive member 150 is arranged between the conductive bearing 140 and the metal member 110, that is, the conductive bearing 140 and the metal member 110 There is an axially extending gap between the parts 110, at least part of the elastic conductive part 150 is located in the gap, one axial side of the elastic conductive part 150 is in contact with the conductive bearing 140, and the other axial side of the elastic conductive part 150 is in contact with the metal
  • the contact with the member 110 not only makes the processing of the elastic conductive member 150 more convenient, but also reduces the difficulty of assembling the elastic conductive member 150 .
  • the elastic conductive part 150 generates a pressing force through its own elastic deformation, so that it can be tightly sandwiched between the conductive bearing 140 and the metal part 110, and realizes close contact with the conductive bearing 140 and the metal part 110 respectively, thereby reducing the size of the metal part. 110.
  • the contact resistance between the elastic conductive member 150 and the conductive bearing 140 guides the shaft current, prevents the shaft current from corroding the slewing bearing 180 of the motor 100, and prolongs the service life of the conductive bearing 140 and the slewing bearing 180.
  • the elastic force that the elastic conductive member 150 can generate is within a certain range, that is to say, as the conductive bearing 140 is subjected to different forces, the elastic conductive member 150 can be adaptively adjusted according to the force transmitted by the conductive bearing 140, that is, it can pass
  • the pressing force generated by the self-deformation of the elastic conductive member 150 achieves a force balance with the conductive bearing 140 to ensure that the conductive bearing 140 is evenly stressed. Movement, and due to the self-adaptive ability of the elastic conductive member 150, the elastic conductive member 150 can be stably contacted with the conductive bearing 140 and the metal member 110 respectively, and the conductive bearing 140 will not be effectively shifted by the rotating shaft 130 contact to ensure electrical continuity.
  • the elastic conductive member 150 can also prevent the conductive bearing 140 from being damaged due to stress concentration, and prevent the conductive bearing 140 from being abnormally worn due to partial load.
  • the present application can realize the anti-corrosion effect only by sheathing the conductive bearing 140 and the elastic conductive member 150 on the rotating shaft 130 , and has the advantages of simple structure, reasonable layout, low cost, and simple assembly.
  • the motor 100 further includes a stator 190 that surrounds the rotor core 120 .
  • the stator 190 includes a stator core 191 and a stator winding 192 .
  • the stator winding 192 is wound on the stator core 191 .
  • the working principle of the motor 100 is known to those skilled in the art, and will not be described in detail here.
  • the conductive bearing 140 includes a bearing inner ring 141 and a bearing outer ring 142 sleeved outside the bearing inner ring 141 , and there is a gap between the bearing inner ring 141 and the bearing outer ring 142 .
  • the conductive bearing 140 also includes two sealing rings, and the two sealing rings are respectively sealed between the two ends of the bearing outer ring 142 and the bearing inner ring 141 along the axial direction (that is, the thickness direction), that is, the two sealing rings are respectively sealed on the conductive bearing.
  • the steel ball of the conductive bearing 140 is sealed between the two sealing rings, the bearing inner ring 141 and the bearing outer ring 142, and between the bearing inner ring 141 and the bearing outer ring 142
  • the gap in the gap is filled with conductive grease
  • the shaft current can leak to the bearing inner ring 141 of the conductive bearing 140 through the rotating shaft 130, and then quickly conduct to the bearing outer ring 142 through the conductive grease, so as to ensure that the conductive bearing 140 has excellent electrical conductivity .
  • Due to the presence of the conductive grease the resistance between the bearing inner ring 141 and the bearing outer ring 142 is reduced and has good electrical conductivity.
  • the electrical resistance of the conductive bearing 140 is smaller.
  • the conductive bearing 140 is a deep groove ball bearing.
  • the conductive bearing 140 plays a role of conducting the shaft current, and the conductive bearing 140 with a smaller size series can obtain better high-speed performance and conductive performance. Therefore, the size of the conductive bearing 140 is much smaller than the size of the slew bearing 180 . Further, the conductive bearing 140 is installed at the tail end (the non-loaded end, the second exposed end) of the rotating shaft 130 , and the conductive bearing 140 is in close contact with the elastic conductive member 150 and is electrically connected.
  • the elastic conductive member 150 is arranged between the metal member 110 and the conductive bearing 140 in a compressed state, and the elastic conductive member 150 will compress the conductive bearing 140 and the metal member 110 against the reverse force generated by the elastic conductive member 150 in order to return to its original shape. superior.
  • the connection mode between the elastic conductive part 150 and the metal part 110 may be a direct connection between the two, or an indirect connection between the elastic conductive part 150 and the metal part 110 through other conductive parts.
  • the piece 150 is directly guided to the metal piece 110, and it can also be passed indirectly through other conductive components.
  • the metal part 110 is set to be grounded, so that the shaft current can be discharged to the ground through the metal part 110 .
  • the motor 100 provided by the present application can not only be used in the field of vehicles, as the driving motor 100 of the vehicle, of course, it can also be used in the field of home appliances, such as air conditioners, clothes processing equipment, cooking appliances, etc.
  • the conductive part of the elastic part is squeezed by the conductive bearing 140 and the metal part 110, so that it is stably installed in the gap between the two, and realizes the close contact between the conductive bearing 140, the elastic conductive part 150 and the metal part 110, thereby forming a good the conductive path.
  • the buffer space 150a formed between the elastic conductive part 150 and the metal part 110 and/or the conductive bearing 140 can improve assembly reliability on the one hand and adapt to changing installation environments.
  • the metal part 110 and the conductive bearing 140 The installation gap between them has a standard height in the axial direction. In the actual assembly process, there may be a slight deviation in the axial height of the installation gap, and the buffer space 150a allows further deformation of the elastic conductive member 150 in the axial direction to adapt to in different installation environments.
  • the rotating shaft 130 may have axial movement.
  • the conductive bearing 140 on the rotating shaft 130 will also have an axial displacement.
  • the elastic conductive member 150 will After being further compressed, the buffer space 150a between the elastic conductive member 150 and the conductive bearing 140 on both axial sides and the metal member 110 will provide the possibility for further compression, which can provide buffer for the axial movement of the conductive bearing 140
  • the margin prevents the elastic conductive part 150 between the conductive bearing 140 and the metal part 110 from being in the maximum compression state, and cannot bear the further compression that may exist during the operation of the motor 100, so as to avoid the conductive bearing 140, the elastic conductive part 150 and the metal part
  • There is a hard contact in the axial direction between 110 which reduces the wear rate of the conductive bearing 140, the elastic conductive member 150 and the metal member 110, and improves the service life of the motor 100 product.
  • the elastic conductive member 150 includes a connecting portion 1510 and at least two elastic portions 1520, and the at least two elastic portions 1520 are respectively Connected to the connecting portion 1510 , each elastic portion 1520 of the at least two elastic portions 1520 extends in a meander than the connecting portion 1510 to form a buffer space 150 a.
  • the elastic conductive member 150 includes a connecting portion 1510 and an elastic portion 1520 , the connecting portion 1510 can provide structural support for the elastic portion 1520 , that is, the connecting portion 1510 can play a supporting role.
  • the elastic portion 1520 extends meanderingly relative to the connecting portion 1510 , specifically, the elastic portion 1520 extends at least along the axial direction compared with the connecting portion 1510 , and a buffer can be formed between the elastic portion 1520 and the conductive bearing 140 and/or between the metal parts 110 Space 150a.
  • the elastic part 1520 can be deformed compared with the connecting part 1510, thereby providing a reverse elastic force, so that the elastic conductive part 150 is clamped between the conductive bearing 140 and the metal part 110 between.
  • the elastic portion 1520 is protruding compared to the connecting portion 1510 , that is, the elastic portion 1520 is exposed beyond the connecting portion 1510 , so as to facilitate the contact between the elastic portion 1520 and the conductive bearing 140 and/or the metal piece 110 .
  • the contact positions of the elastic conductive member 150 , the conductive bearing 140 and the metal member 110 may be different.
  • the elastic part 1520 is in contact with the conductive bearing 140 , and the connecting part 1510 is in contact with the metal part 110 .
  • the elastic part 1520 is in contact with the metal part 110
  • the connecting part 1510 is in contact with the conductive bearing 140 .
  • the protruding direction of the elastic part 1520 is different. It is possible that the elastic part 1520 in one protruding direction is in contact with the conductive bearing 140 , and the elastic part 1520 in the other protruding direction is in contact with the metal piece 110 . In this embodiment, the connecting portion 1510 is not in contact with the conductive bearing 140 and the metal part 110 .
  • the main function of the connecting part 1510 is to connect the supporting elastic part 1520.
  • the connecting part 1510 can be made to be in a wave shape in the axial direction, then The connecting portion 1510 can also have a certain deformability, and on the basis of the elastic portion 1520 , further increase the deformability of the elastic conductive member 150 as a whole.
  • the number of elastic parts 1520 is at least two, and at least two elastic parts 1520 are uniformly arranged on the connecting part 1510 .
  • the elastic portion 1520 evenly arranged on the connecting portion 1510 can balance the force on the conductive bearing 140 and prevent the conductive bearing 140 from shifting due to the unbalanced force due to the arrangement of the elastic conductive member 150, which will lead to aggravated wear. .
  • one elastic portion 1520 of at least two elastic portions 1520 protrudes toward the conductive bearing 140 to form a first elastic convex portion 1521 , and the first elastic convex portion 1521 and the conductive bearing 140 In contact, the other elastic portion 1520 of the at least two elastic portions 1520 is recessed away from the conductive bearing 140 to form a first elastic concave portion 1522 , and the first elastic concave portion 1522 is in contact with the metal piece 110 .
  • the number of elastic parts 1520 is at least two, and at least two elastic parts 1520 include a first elastic convex part 1521 and a second elastic convex part 1523, and the first elastic convex part 1521 is smaller than the connecting part 1510. It protrudes toward the conductive bearing 140 , the first elastic protrusion 1521 is in contact with the conductive bearing 140 , the second protrusion is recessed away from the conductive bearing 140 compared to the connecting portion 1510 , and the second elastic protrusion 1523 is in contact with the metal piece 110 , there is a first buffer space between the first elastic protrusion 1521 and the metal piece 110, and there is a second buffer space between the second elastic protrusion 1523 and the conductive bearing 140.
  • the first elastic protrusion 1521 The force of the conductive bearing 140 will be compressed. At this time, the first elastic protrusion 1521 has a tendency to move towards the metal piece 110. At this time, the volume of the first buffer space will decrease. Similarly, at the same time, the second elastic protrusion 1523 will be compressed by the force of the metal piece 110. At this time, the second elastic protrusion 1523 has a tendency to move toward the conductive bearing 140. At this time, the volume of the second buffer space will decrease.
  • first elastic convex part 1521 and the second elastic convex part 1523 respectively move in opposite directions relative to the exposed direction of the connecting part 1510, further compression possibilities are provided for the elastic conductive member 150, so that during the operation of the motor 100 Among them, the metal part 110, the elastic conductive part 150, and the conductive bearing 140 are still in flexible contact, which reduces the wear rate of the conductive bearing 140, the elastic conductive part 150 and the metal part 110, and improves the service life of the motor 100 product.
  • the number of first elastic protrusions 1521 is at least two, the number of first elastic recesses 1522 is at least two, and any one of the at least two first elastic protrusions 1521 is located at least two Between two adjacent first elastic concave parts 1522.
  • the number of first elastic protrusions 1521 is at least two, and the number of first elastic recesses 1522 is also at least two, and one first elastic protrusion 1521 is located between two adjacent second elastic protrusions 1523 In between, that is, the first elastic protrusions 1521 and the second elastic protrusions 1523 are arranged at intervals one after the other.
  • the elastic conductive member 150 it has a first axial side facing the conductive bearing 140, and also includes a second axial side facing the metal member 110.
  • the first axial side there are a plurality of first elastic protrusions arranged at intervals.
  • the elastic conductive member 150 For the elastic conductive member 150, the first elastic convex portion 1521 is subjected to the force exerted by the conductive bearing 140, and the adjacent first elastic concave portion 1522 is subjected to the opposite force exerted by the metal member 110, That is, the elastic conductive member 150 itself has various stress directions, which prevents possible fatigue fracture of the elastic conductive member 150 due to too concentrated force in the same direction, and improves the structural stability of the elastic conductive member 150 .
  • At least two elastic portions 1520 respectively protrude toward the direction close to the conductive bearing 140 to form second elastic protrusions 1523 , and the at least two second elastic protrusions 1523 are respectively in contact with the conductive bearing 140 , and the connecting portion 1510 is in contact with the metal piece 110 .
  • each elastic portion 1520 of the at least two elastic portions 1520 protrudes toward the conductive bearing 140 to form a second elastic protrusion 1523 , and the second elastic protrusion 1523 faces the conductive bearing compared with the connecting portion 1510 140 protrudes, and the second elastic protrusion 1523 is in contact with the conductive bearing 140.
  • the second elastic protrusion 1523 has a tendency to move toward the metal part 110, and the volume of the buffer space 150a decreases, thereby providing further compression possibility for the elastic conductive part 150, so that there is a flexible contact between the elastic conductive part 150 and the conductive bearing 140, and the conductive bearing 140 is lowered.
  • the wear rate between the elastic conductive member 150 and the service life of the motor 100 is improved.
  • the connecting part 1510 not only plays the role of supporting and connecting the second elastic convex part 1523, but also plays the role of contacting and connecting with the metal part 110, so as to realize the connection between the rotating shaft 130, the conductive bearing 140, the conductive connecting part 170 and the metal part 110. conduction connection.
  • the elastic portions 1520 in the elastic conductive member 150 are all protruded in the same direction, so that the processing difficulty and assembly difficulty of the elastic conductive member 150 can be reduced.
  • the connecting part 1510 is a connecting curved part 1511
  • the number of connecting curved parts 1511 is at least two
  • any one of the at least two connecting curved parts 1511 is connected to a curved part
  • the part 1511 is respectively connected with two adjacent elastic parts 1520 among the at least two elastic parts 1520 .
  • At least two elastic parts 1520 can be connected through at least two connecting curved parts 1511, wherein any connecting curved part 1511 in the plurality of connecting curved parts 1511 is connected between two adjacent elastic parts 1520 Between them, that is, at least two connecting curved parts 1511 and at least two elastic parts 1520 are connected end to end to form the elastic conductive member 150 .
  • at least two elastic parts 1520 may protrude towards the direction close to the conductive bearing 140 to form elastic protrusions, or may be recessed away from the conductive bearing 140 to form elastic concave parts. That is, any combination of the first elastic convex portion 1521/the first elastic concave portion 1522/the second elastic convex portion 1523 may be connected between at least two connecting curved portions 1511.
  • the elastic part 1520 includes the first elastic convex part 1521 and the first elastic concave part 1522
  • the first elastic convex part 1521 and the first elastic concave part 1522 are respectively connected between the two connecting curved parts 1511
  • the elastic The conductive member 150 has a wave-shaped curved structure as a whole.
  • the first elastic convex portion 1521 protruding toward the conductive bearing 140 can be regarded as a wave crest
  • the first elastic concave portion 1522 concave away from the conductive bearing 140 can be regarded as a wave valley
  • the connecting curved portion 1511 can be regarded as a peak.
  • the elastic force generated by the first elastic convex part 1521 and the first elastic concave part 1522 can be transmitted to the conductive bearing 140 and the metal part 110, so that the elastic conductive part 150 is clamped between the metal part 110 and the conductive bearing 140, so that the two The contact resistance between them becomes smaller, making it easier for the shaft current to be transmitted to the metal part 110 via the conductive bearing 140 and the elastic conductive member 150, thereby achieving grounding and significantly reducing the corrosion of the slewing bearing 180.
  • the elastic portion 1520 includes the second elastic protrusions 1523
  • each second elastic protrusion 1523 is connected between two adjacent connecting curved portions 1511 .
  • the connecting portion 1510 is a connecting ring 1512 , and at least two second elastic protrusions 1523 are respectively disposed on the outer periphery of the connecting portion 1510 .
  • connection portion 1510 is a connection ring 1512
  • the outer contour of the connection ring 1512 is circular
  • the connection ring 1512 includes an outer periphery
  • at least two second elastic protrusions 1523 are respectively disposed on the outer periphery of the connection portion 1510 .
  • the second elastic protrusion 1523 includes opposite connecting ends and contact ends.
  • the bearing 140 is in contact with the second elastic convex portion 1523 itself. Since the elastic conductive member 150 is a sheet metal bent part, the connection end must have a certain extension in the radial direction due to the limitation of the processing method.
  • the conductive bearing 140 will be subjected to some radial bias load force. At the same time, the conductive bearing 140 will transmit at least part of the radial bias load force to the elastic conductive member 150. As far as the conductive member 150 is concerned, the connecting end extending in the radial direction can play a good buffering role, preventing the second elastic protrusion 1523 from being broken due to the impact of radial force.
  • each second elastic protrusion 1523 in the at least two second elastic protrusions 1523 extends along the outer periphery of the connecting portion 1510 to form an extension section, at least The extension sections of two adjacent second elastic protrusions 1523 of the two second elastic protrusions 1523 are close to and connected with each other.
  • the second elastic protrusion 1523 connects the end and the contact end, and the connection end is arranged on the outer periphery of the connecting portion 1510.
  • a part of two adjacent second elastic protrusions 1523 extend close to each other to form The extension section, the extension sections of two adjacent second elastic protrusions 1523 are close to and connected to each other, that is to say, for each second elastic protrusion 1523, the contact area with the connecting portion 1510 is effectively increased, and thus At the same time, there is also a mutual connection between two adjacent second elastic protrusions 1523, so that the structural stability of the second elastic protrusions 1523 can be improved.
  • Both the adjacent second elastic convex portion 1523 and the connecting portion 1510 can provide structural support therefor and prolong the service life of the elastic conductive member 150 .
  • At least two elastic portions 1520 are respectively recessed away from the conductive bearing 140 to form second elastic concave portions, the at least two second elastic concave portions are in contact with the metal piece 110 , and the connecting portion 1510 is in contact with the conductive bearing 140 .
  • each elastic portion 1520 of the at least two elastic portions 1520 is concaved away from the conductive bearing 140 to form a second elastic concave portion, and the second elastic concave portion is concave away from the conductive bearing 140 compared with the connecting portion 1510 .
  • the two elastic recesses are in contact with the metal piece 110.
  • the second elastic recess has a tendency to move toward the conductive bearing 140, buffering
  • the volume of the space 150a is reduced, thereby providing further compression possibility for the elastic conductive member 150, so that there is a flexible contact between the elastic conductive member 150 and the metal member 110, and the wear rate between the metal member 110 and the elastic conductive member 150 improves the motor. 100 lifetime of the product.
  • the connecting part 1510 not only plays the role of supporting and connecting the second elastic concave part, but also plays the role of contacting and connecting with the conductive bearing 140, so as to realize the conduction between the rotating shaft 130, the conductive bearing 140, the conductive connecting piece 170 and the metal piece 110. connect.
  • the elastic portions 1520 in the elastic conductive member 150 are all protruded in the same direction, so that the processing difficulty and assembly difficulty of the elastic conductive member 150 can be reduced.
  • the elastic conductive member 150 has a plurality of buffer cavities 150b.
  • the elastic conductive member 150 not only forms a buffer space 150a with the conductive bearing 140 and/or the metal member 110, but at the same time, the elastic conductive member 150 itself also has a plurality of buffer cavities 150b.
  • the buffer space 150a and the plurality of buffer cavities 150b can provide reverse elastic force for the elastic conductive member 150, and the plurality of buffer cavities 150b can provide elastic reserve for the elastic conductive member 150, so that the elastic conductive member 150 faces multiple
  • they can be successfully assembled in the installation gap, so that the elastic conductive member 150 is compressed between the conductive bearing 140 and the metal part 110, and is in close contact with the conductive bearing 140 and the metal part 110, reducing the size of the metal part 110. 1.
  • the contact resistance between the elastic conductive member 150 and the conductive bearing 140 acts as a guide to the shaft current, prevents the shaft current from corroding the slewing bearing 180 of the motor 100, and prolongs the service life of the conductive bearing 140 and the slewing bearing 180.
  • the installation gap between the metal part 110 and the conductive bearing 140 has a standard height in the axial direction. In the actual assembly process, there may be a slight deviation in the axial height of the installation gap, which leads to variable installation gaps. .
  • the inside of the elastic conductive member 150 is honeycomb-shaped, which not only ensures its own structural strength and is not prone to breakage due to external force, but also provides further compression possibilities for the elastic conductive member 150 .
  • the elastic conductive member 150 includes a plurality of axially stacked elastic pieces 1530 , and each elastic piece 1530 in the plurality of elastic pieces 1530 includes a third elastic convex portion 1531 and a third elastic concave portion 1532 ,
  • the third elastic convex part 1531 protrudes toward the conductive bearing 140
  • the third elastic concave part 1532 is connected with the third elastic convex part 1531
  • the third elastic concave part 1532 is recessed away from the conductive bearing 140
  • the plurality of elastic pieces 1530 include the first elastic piece and the The first elastic piece is away from the second elastic piece on the side of the conductive bearing 140.
  • the buffer cavities 150b there is one of the buffer cavities 150b between the third elastic convex portion 1531 of the first elastic piece and the third elastic concave portion 1532 of the second elastic piece.
  • the third elastic concave portion 1532 is connected to the third elastic convex portion 1531 of the second elastic piece.
  • the elastic conductive member 150 includes a plurality of axially stacked elastic pieces 1530, each elastic piece 1530 has the same structure, and there is a rotation angle between two adjacent elastic pieces 1530, so that two adjacent elastic pieces 1530 are stacked in a misplaced manner. .
  • each elastic piece 1530 includes a connected third elastic protrusion 1531 and a third elastic recess 1532, the third elastic protrusion 1531 protrudes toward the conductive bearing 140, the third elastic recess 1532 is recessed away from the conductive bearing 140, and the third elastic
  • the number of the convex portion 1531 and the third elastic concave portion 1532 corresponds one by one, the number of the third elastic convex portion 1531 is at least one, the number of the third elastic concave portion 1532 is at least one, the third elastic convex portion 1531 and the third elastic concave portion 1532 connected end to end to form a shrapnel 1530 .
  • each third elastic recess 1532 is connected between two adjacent third elastic recesses 1532 .
  • the elastic piece 1530 has a wave-shaped curved structure as a whole, the third elastic convex part 1531 can be regarded as a crest, and the third elastic concave part 1532 can be regarded as a wave trough.
  • the axial direction from the conductive bearing 140 to the metal piece 110 includes the first elastic piece and the second elastic piece, that is, in the direction from top to bottom, the third elastic protrusion of the first elastic piece
  • the part 1531 (peak) corresponds to the third elastic recess 1532 (trough) of the second elastic piece below it and forms a buffer cavity 150b.
  • the third elastic protrusions 1531 (peaks) of the elastic pieces are connected to each other, so as to realize reliable connection performance between the first elastic piece and the second elastic piece.
  • the joints of the connecting portion 1510 and the elastic portion 1520 are rounded and transitioned.
  • the elastic conductive member 150 is in contact with the bearing outer ring 142 of the conductive bearing 140 .
  • the elastic conductive member 150 is in contact with the bearing outer ring 142 of the conductive bearing 140, and the bearing outer ring 142 does not rotate with the rotating shaft 130, so there is no relative displacement between the elastic conductive member 150 and the bearing outer ring 142, so that Reduce the wear rate of the elastic conductive part 150 and the metal part 110, and prolong the service life.
  • the elastic conductive member 150 is not in contact with the bearing inner ring 141 of the conductive bearing 140. Since the bearing inner ring 141 rotates synchronously with the rotating shaft 130, if the elastic conductive member 150 is in contact with the bearing inner ring 141 and the bearing outer ring 142 at the same time, It will cause the problem that the inner ring 141 of the bearing is stuck and unable to rotate.
  • a part of the bearing outer ring 142 is in contact with the elastic conductive member 150, that is, a part of the bearing outer ring 142 is used for conductive contact, and is in mutual pressing contact with the elastic conductive member 150, and the other part of the bearing outer ring 142 is in contact with the elastic conductive member 150.
  • a part is exposed and is not in contact with the elastic conductive member 150 , so that the wear of the outer ring 142 of the bearing can be reduced.
  • the elastic conductive member 150 is located on the axial side of the conductive bearing 140 away from the rotor core 120, the elastic conductive member 150 is in contact with the axial end surface of one side of the bearing outer ring 142, and the elastic conductive member 150 is in contact with the bearing outer ring 142.
  • the circumferential sides of the ring 142 do not touch.
  • an escape port 160 is provided on the elastic conductive member 150, and a part of the rotating shaft 130 can extend into the escape port Within 160.
  • the elastic conductive member 150 also includes an avoidance port 160, which is arranged on the elastic conductive member 150, and the avoidance port 160 can avoid the rotating shaft 130 and the bearing inner ring 141 of the conductive bearing 140, and the bearing inner ring 141 and the bearing inner ring 141
  • the rotating shaft 130 has an interference fit, and the bearing inner ring 141 rotates synchronously with the rotating shaft 130 .
  • the bearing outer ring 142 is in contact with the elastic conductive member 150 , and the bearing outer ring 142 and the elastic conductive member 150 are stationary and will not rotate with the movement of the rotating shaft 130 .
  • the escape port 160 is axially penetratingly disposed on the elastic conductive member 150 .
  • the elastic conductive member 150 includes at least two elastic portions 1520 disposed on the connecting portion 1510, and the avoidance opening 160 is disposed on the connecting portion 1510.
  • the connecting portion 1510 has a ring structure.
  • the elastic conductive member 150 includes at least two connecting curved parts 1511 and at least two elastic parts 1520, one connecting curved part 1511 is connected between two adjacent elastic parts 1520, at least two connecting curved parts 1511 and at least two elastic parts 1520 is connected and enclosed to form an escape opening 160 .
  • the elastic conductive member 150 has a hollow structure, thereby avoiding the contact between the elastic conductive member 150 and the inner ring of the rotating shaft 130 and the conductive bearing 140. If the elastic conductive member 150 is not in a hollow structure, the conductive The axial end of the inner ring of the bearing 140 and the rotating shaft 130 will be in contact with the elastic conductive member 150 to generate frictional torque and disturb the rotation of the rotating shaft 130 .
  • the escape port 160 is used to avoid the rotating shaft 130 and the bearing inner ring 141.
  • the rotation process of the rotating shaft 130 includes normal rotation and axial movement.
  • the rotating shaft 130 and the bearing inner ring 141 can extend into the avoidance opening 160 in the case of axial movement.
  • the escape port 160 includes a circular opening.
  • the escape port 160 can be a circular opening, which is adapted to the rotation tendency of the bearing inner ring 141 and the rotating shaft 130 in the conductive bearing 140.
  • the circular opening It can better avoid the deviation in the radial direction.
  • the elastic conductive member 150 is a sheet metal member.
  • the elastic conductive member 150 when the elastic conductive member 150 includes the elastic portion 1520 and the connecting portion 1510, the elastic portion 1520 and the connecting portion 1510 can be formed by a sheet metal stamping and bending process, and at the same time, the connecting portion 1510 and the elastic portion 1520 are One-piece structure, the connection part 1510 and the elastic part 1520 are specifically one-piece structure, because the mechanical performance of the one-piece structure is good, thus can improve the connection strength between the connection part 1510 and a plurality of elastic parts 1520, in addition, the connection part can be 1510 and the elastic part 1520 are integrally made and mass-produced to improve the processing efficiency of the product and reduce the processing cost of the product.
  • the integrity of the elastic conductive part 150 is improved, the number of parts is reduced, the installation process is reduced, and the installation efficiency is improved, so that the elastic conductive part The installation of 150 is more convenient and reliable.
  • the motor 100 also includes a conductive connector 170, the conductive connector 170 is connected to the metal part 110, and at least part of the elastic conductive member 150 is located between the conductive connector 170 and the conductive connector 170. Between the conductive bearings 140.
  • the motor 100 also includes a conductive connecting piece 170, which is respectively connected to the metal piece 110 and the elastic conductive piece 150, that is to say, in order to realize the drainage of the shaft current, the shaft current at the elastic conductive piece 150 It is not directly connected to the metal part 110, but guided to the metal part 110 through the conductive connecting part 170.
  • the conductive connecting part 170 By setting the conductive connecting part 170, the assembly process can be simplified and the manufacturing difficulty can be reduced under the premise of ensuring the conductive connection.
  • the conductive connector 170 is an aluminum alloy casting. Specifically, the conductive connector 170 has a plate-like structure. The conductive connector 170 is installed on the end cover 111 of the motor 100. Pass.
  • the conductive connector 170 includes a board body 171 and a mounting portion 172 , and the board body 171 is connected to the metal piece 110 .
  • the mounting portion 172 is disposed on the plate body 171 toward the rotating shaft 130 , and the mounting portion 172 includes a mounting position, and a part of the elastic conductive member 150 and the conductive bearing 140 are respectively disposed at the mounting position.
  • the conductive connector 170 includes a board body 171 and a mounting portion 172 , and the board body 171 is connected to the metal part 110 .
  • the mounting portion 172 is disposed on the plate body 171 toward the rotating shaft 130 , specifically, the mounting portion 172 may be disposed on the plate body 171 extending along the axial direction.
  • the installation portion 172 includes an installation location, at least a part of the elastic conductive member 150 is disposed at the installation location, so as to facilitate the installation and positioning of the elastic conductive member 150 .
  • the plate body 171 and the mounting portion 172 are of an integrated structure, and the mechanical properties of the integral structure are good, so the connection strength between the plate body 171 and the mounting portion 172 can be improved.
  • the plate body 171 and the mounting portion 172 can be It is made in one piece and produced in batches to improve the processing efficiency of the product and reduce the processing cost of the product. Moreover, by designing the integrated structure of the plate body 171 and the mounting portion 172, the integrity of the conductive connector 170 is improved, the number of parts is reduced, the installation process is reduced, and the installation efficiency is improved. The installation of 170 is more convenient and reliable.
  • the mounting portion 172 includes a supporting portion 172 a and an abutting portion 172 b, and the supporting portion 172 a is disposed on the board body 171 .
  • the abutment portion 172b is connected to the axial end of the support portion 172a, and the installation position is set between the abutment portion 172b and the support portion 172a; wherein, the bearing outer ring 142 of the conductive bearing 140 is in contact with the abutment portion 172b, and the elastic conductive member 150 is disposed between the contact portion 172 b , the support portion 172 a and the conductive bearing 140 .
  • the mounting portion 172 includes a supporting portion 172 a and an abutting portion 172 b, and the supporting portion 172 a is axially extended and disposed on the plate body 171 .
  • the abutment portion 172b is connected to the axial end of the support portion 172a, and the installation position is located between the abutment portion 172b and the support portion 172a.
  • the support portion 172a is in an annular structure, and the abutment portion 172b is also in an annular structure. Smaller than the inner diameter of the abutting portion 172b, that is, the installation position is an annular step position (annular counterbore).
  • the bearing outer ring 142 is arranged on a part of the inner wall of the abutting portion 172b, wherein the counterbore and the conductive
  • the bearing 140 is a concentric structure.
  • An annular mounting gap is formed between another part of the inner wall of the abutting portion 172 b , the supporting portion 172 a and the conductive bearing 140 , and the mounting gap is used for accommodating at least a part of the elastic conductive member 150 .
  • the elastic conductive member 150 fully contacts the conductive bearing 140 and the mounting portion 172 through elastic deformation, thereby forming a good conductive path.
  • the shaft current includes two conductive paths, one of which passes through the rotating shaft 130 , the conductive bearing 140 , the elastic conductive element 150 , the conductive connecting element 170 and the metal element 110 in sequence.
  • the second is to pass through the rotating shaft 130 , the slewing bearing 180 and the end cover 111 in sequence.
  • the resistance of the first conductive path is smaller than that of the second conductive path, that is, the shaft current will be preferentially transmitted through the first conductive path, preventing the shaft current from corroding the slewing bearing 180 and prolonging the service life of the slewing bearing 180 .
  • the support part 172a can form an axial limit for the conductive bearing 140 and the elastic conductive member 150
  • the abutting part 172b can be the conductive bearing 140 and the elastic conductive member 150 constitutes a radial limit, which facilitates the positioning and installation of the elastic conductive member 150 and the conductive bearing 140 under the premise of ensuring conductive contact.
  • the abutment portion 172b includes an abutment wall 1721, a shaft side wall 1722 and a guide portion, the abutment wall 1721 faces the conductive bearing 140, the shaft side wall 1722 faces away from the support portion 172a, and the guide portion is provided on the abutment wall 1721 and the shaft side The junction of the wall 1722.
  • the abutment portion 172b includes an abutment wall 1721, a shaft side wall 1722 and a guide portion, the abutment wall 1721 faces the elastic conductive member 150 and the conductive bearing 140, and the bearing outer ring 142 of the conductive bearing 140 and the abutment wall A part of the wall 1721 abuts, and the elastic conductive member 150 can contact another part of the abutting wall 1721, thereby increasing the contact area between the elastic conductive member 150 and the conductive connecting member 170, and improving the reliability of the conductive path.
  • the shaft side wall 1722 is disposed away from the supporting portion 172 a, that is, the shaft side wall 1722 is an axial end wall facing the rotor core 120 , and the guide portion is located at the connection between the abutting wall 1721 and the shaft side wall 1722 .
  • the guide portion can facilitate the assembly of the elastic conductive member 150 and the conductive bearing 140 , reducing the difficulty of assembly. It is worth noting that the guide portion may be a guide arc, guide slope 1723 and the like.
  • the support portion 172 a has a hollow cavity opening toward the rotating shaft 130 .
  • the support portion 172a has a hollow cavity that opens toward the rotating shaft 130.
  • the hollow cavity can prevent the conductive connector 170 from contacting the inner ring of the conductive bearing 140 and the rotating shaft 130. If the conductive connector 170 is not hollow, it will conduct electricity.
  • the axial end/shaft 130 of the inner race of the bearing 140 may interfere with the conductive connector 170 , creating a frictional torque that interferes with the rotation of the conductive bearing 140 .
  • the metal part 110 includes an end cover 111 , the end cover 111 is arranged on one axial side of the rotor core 120 , and at least a part of the elastic conductive member 150 is arranged on Between the end cover 111 and the conductive bearing 140 .
  • the metal part 110 includes an end cover 111 disposed on one axial side of the rotor core 120 .
  • the end cover 111 is disposed close to the second exposed end of the rotating shaft 130 , that is, the end cover 111 is a rear end cover.
  • At least a part of the elastic conductive member 150 is arranged between the end cover 111 and the conductive bearing 140.
  • the end cover 111 is relatively close to the conductive bearing 140, so that the shaft current can be led out quickly, and the elastic conductive member 150 and the conductive connection can also be saved.
  • the material cost of the component 170 is reduced, so that the layout of the conductive path is more reasonable.
  • the motor 100 also includes a rotary bearing 180, which is set on the rotating shaft 130.
  • the rotary bearing 180 is located on the side of the conductive bearing 140 away from the end cover 111.
  • the inner diameter of the rotary bearing 180 is D2, and the resistance of the inner and outer rings of the rotary bearing 180 is R2. , where, D1 ⁇ D2, R1 ⁇ R2.
  • the resistance between the metal part 110 and the slewing bearing 180 is greater than the resistance between the metal part 110 and the conductive bearing 140 , so that the shaft current can preferentially flow out from the path where the conductive bearing 140 is located.
  • the slewing bearing 180 plays a role of rotatably supporting the rotating shaft 130 .
  • the resistance between the inner and outer rings of the slewing bearing 180 is greater than the resistance of the inner and outer rings of the conductive bearing 140, and the inner diameter of the slewing bearing 180 is larger than the inner diameter of the conductive bearing 140, which further facilitates the connection of the shaft current to the metal part 110 through the conductive bearing 140 and prevents the shaft current from converging on the rotation. Corrosion of the bearing 180 prolongs the service life of the bearing.
  • a vehicle including the motor 100 provided by any of the above-mentioned designs.
  • the vehicle provided in the present application includes the motor 100 provided by any of the above-mentioned designs, and therefore has all the beneficial effects of the motor 100 , which will not be repeated here.
  • the vehicle may be a new energy vehicle.
  • new energy vehicles include pure electric vehicles, extended-range electric vehicles, hybrid vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc.
  • the motor 100 provided in this application includes a metal part 110 , a rotor core 120 , a rotating shaft 130 , a conductive bearing 140 and an elastic conductive part 150 , wherein the rotor core 120 is arranged on one side of the metal part 110 .
  • the metal part 110 may be the end cover 111 of the motor 100 , or the casing 112 of the motor 100 , or the like.
  • the metal part 110 is an end cover 111
  • the end cover 111 is located on one axial side of the rotor core 120 .
  • the casing 112 is disposed around the outer side of the rotor core 120 in the circumferential direction.
  • the rotor core 120 has a shaft hole, and the shaft hole penetrates the rotor core 120 along the axial direction, and the rotating shaft 130 is penetrated in the shaft hole, and the rotating shaft 130 is connected with the rotor core 120 .
  • the rotating shaft 130 includes two opposite exposed ends, which are respectively a first exposed end and a second exposed end.
  • the motor 100 when the motor 100 is applied to a vehicle, the motor 100 can be used as a driving motor, and the first exposed end is used for It is connected with loads such as wheels of the vehicle, so that when the rotating shaft 130 rotates, the wheels can be driven to rotate to realize power output.
  • the conductive bearing 140 is sleeved on the rotating shaft 130 .
  • the conductive bearing 140 is an additional bearing independent of the slewing bearing 180 of the motor 100 .
  • the conductive bearing 140 plays a role of connecting the rotating shaft 130 and the elastic conductive member 150 . Further, the conductive bearing 140 is sleeved on the second exposed end, that is, the conductive bearing 140 is sleeved on the non-loaded end of the rotating shaft 130 .
  • the elastic conductive member 150 is located on the axial side of the conductive bearing 140 away from the rotor core 120, and at least part of the elastic conductive member 150 is arranged between the conductive bearing 140 and the metal member 110, that is, the conductive bearing 140 and the metal member 110 There is an axially extending gap between the parts 110, at least part of the elastic conductive part 150 is located in the gap, one axial side of the elastic conductive part 150 is in contact with the conductive bearing 140, and the other axial side of the elastic conductive part 150 is in contact with the metal
  • the contact with the member 110 not only makes the processing of the elastic conductive member 150 more convenient, but also reduces the difficulty of assembling the elastic conductive member 150 .
  • the elastic conductive part 150 generates a pressing force through its own elastic deformation, so that it can be tightly sandwiched between the conductive bearing 140 and the metal part 110, and realizes close contact with the conductive bearing 140 and the metal part 110 respectively, thereby reducing the size of the metal part. 110.
  • the contact resistance between the elastic conductive member 150 and the conductive bearing 140 guides the shaft current, prevents the shaft current from corroding the slewing bearing 180 of the motor 100, and prolongs the service life of the conductive bearing 140 and the slewing bearing 180.
  • the elastic force that the elastic conductive member 150 can generate is within a certain range, that is to say, as the conductive bearing 140 is subjected to different forces, the elastic conductive member 150 can be adaptively adjusted according to the force transmitted by the conductive bearing 140, that is, it can pass
  • the pressing force generated by the self-deformation of the elastic conductive member 150 achieves a force balance with the conductive bearing 140 to ensure that the conductive bearing 140 is evenly stressed. Movement, and due to the self-adaptive ability of the elastic conductive member 150, the elastic conductive member 150 can be stably contacted with the conductive bearing 140 and the metal member 110 respectively, and the conductive bearing 140 will not be effectively shifted by the rotating shaft 130 contact to ensure electrical continuity.
  • the elastic conductive member 150 can also prevent the conductive bearing 140 from being damaged due to stress concentration, and prevent the conductive bearing 140 from being abnormally worn due to partial load.
  • the present application can realize the anti-corrosion effect only by sheathing the conductive bearing 140 and the elastic conductive member 150 on the rotating shaft 130 , and has the advantages of simple structure, reasonable layout, low cost, and simple assembly.
  • the motor 100 further includes a stator 190 that surrounds the rotor core 120 .
  • the stator 190 includes a stator core 191 and a stator winding 192 .
  • the stator winding 192 is wound on the stator core 191 .
  • the working principle of the motor 100 is known to those skilled in the art, and will not be described in detail here.
  • the conductive bearing 140 includes a bearing inner ring 141 and a bearing outer ring 142 sleeved outside the bearing inner ring 141 , and there is a gap between the bearing inner ring 141 and the bearing outer ring 142 .
  • the conductive bearing 140 also includes two sealing rings, and the two sealing rings are respectively sealed between the two ends of the bearing outer ring 142 and the bearing inner ring 141 along the axial direction (that is, the thickness direction), that is, the two sealing rings are respectively sealed on the conductive bearing.
  • the steel ball of the conductive bearing 140 is sealed between the two sealing rings, the bearing inner ring 141 and the bearing outer ring 142, and between the bearing inner ring 141 and the bearing outer ring 142
  • the gap in the gap is filled with conductive grease
  • the shaft current can leak to the bearing inner ring 141 of the conductive bearing 140 through the rotating shaft 130, and then quickly conduct to the bearing outer ring 142 through the conductive grease, so as to ensure that the conductive bearing 140 has excellent electrical conductivity .
  • Due to the presence of the conductive grease the resistance between the bearing inner ring 141 and the bearing outer ring 142 is reduced and has good electrical conductivity.
  • the electrical resistance of the conductive bearing 140 is smaller.
  • the conductive bearing 140 is a deep groove ball bearing.
  • the conductive bearing 140 plays a role of conducting the shaft current, and the conductive bearing 140 with a smaller size series can obtain better high-speed performance and conductive performance. Therefore, the size of the conductive bearing 140 is much smaller than the size of the slew bearing 180 . Further, the conductive bearing 140 is installed at the tail end (the non-loaded end, the second exposed end) of the rotating shaft 130 , and the conductive bearing 140 is in close contact with the elastic conductive member 150 and is electrically connected.
  • the elastic conductive member 150 is arranged between the metal member 110 and the conductive bearing 140 in a compressed state, and the elastic conductive member 150 will compress the conductive bearing 140 and the metal member 110 against the reverse force generated by the elastic conductive member 150 in order to return to its original shape. superior.
  • the connection mode between the elastic conductive part 150 and the metal part 110 may be a direct connection between the two, or an indirect connection between the elastic conductive part 150 and the metal part 110 through other conductive parts.
  • the piece 150 is directly guided to the metal piece 110, and it can also be passed indirectly through other conductive components.
  • the metal part 110 is set to be grounded, so that the shaft current can be discharged to the ground through the metal part 110 .
  • a buffer space 150 a between the elastic conductive member 150 and the metal member 110 there may be a buffer space 150 a between the elastic conductive member 150 and the metal member 110 , and/or there may be a buffer space 150 a between the elastic conductive member 150 and the conductive bearing 140 .
  • the conductive part of the elastic part is squeezed by the conductive bearing 140 and the metal part 110, so that it is stably installed in the gap between the two, and realizes the close contact between the conductive bearing 140, the elastic conductive part 150 and the metal part 110, thereby forming a good the conductive path.
  • the buffer space 150a formed between the elastic conductive part 150 and the metal part 110 and/or the conductive bearing 140 can improve assembly reliability on the one hand and adapt to changing installation environments.
  • the metal part 110 and the conductive bearing 140 The installation gap between them has a standard height in the axial direction. In the actual assembly process, there may be a slight deviation in the axial height of the installation gap, and the buffer space 150a allows further deformation of the elastic conductive member 150 in the axial direction to adapt to in different installation environments.
  • the rotating shaft 130 may have axial movement.
  • the conductive bearing 140 on the rotating shaft 130 will also have an axial displacement.
  • the elastic conductive member 150 will After being further compressed, the buffer space 150a between the elastic conductive member 150 and the conductive bearing 140 on both axial sides and the metal member 110 will provide the possibility for further compression, which can provide buffer for the axial movement of the conductive bearing 140
  • the margin prevents the elastic conductive part 150 between the conductive bearing 140 and the metal part 110 from being in the maximum compression state, and cannot bear the further compression that may exist during the operation of the motor 100, so as to avoid the conductive bearing 140, the elastic conductive part 150 and the metal part
  • There is a hard contact in the axial direction between 110 which reduces the wear rate of the conductive bearing 140, the elastic conductive member 150 and the metal member 110, and improves the service life of the motor 100 product.
  • the specific structure of the elastic conductive member 150 includes at least the following: the elastic conductive member 150 includes a connecting portion 1510 and an elastic portion 1520, the connecting portion 1510 can provide structural support for the elastic portion 1520, that is, the connecting portion 1510 can play a supporting role.
  • the elastic portion 1520 extends meanderingly relative to the connecting portion 1510 , specifically, the elastic portion 1520 extends at least along the axial direction compared with the connecting portion 1510 , and a buffer can be formed between the elastic portion 1520 and the conductive bearing 140 and/or between the metal parts 110 Space 150a.
  • the elastic part 1520 can be deformed compared with the connecting part 1510, thereby providing a reverse elastic force, so that the elastic conductive part 150 is clamped between the conductive bearing 140 and the metal part 110 between.
  • the elastic conductive member 150 includes a plurality of axially stacked elastic pieces 1530 , each elastic piece 1530 has the same structure, and there is a rotation angle between two adjacent elastic pieces 1530 , so that two adjacent elastic pieces 1530 are stacked in a dislocation manner.
  • each elastic piece 1530 includes a connected third elastic protrusion 1531 and a third elastic recess 1532, the third elastic protrusion 1531 protrudes toward the conductive bearing 140, the third elastic recess 1532 is recessed away from the conductive bearing 140, and the third elastic
  • the number of the convex portion 1531 and the third elastic concave portion 1532 corresponds one by one, the number of the third elastic convex portion 1531 is at least one, the number of the third elastic concave portion 1532 is at least one, the third elastic convex portion 1531 and the third elastic concave portion 1532 connected end to end to form a shrapnel 1530 .
  • each third elastic recess 1532 is connected between two adjacent third elastic recesses 1532 .
  • the elastic piece 1530 has a wave-shaped curved structure as a whole, the third elastic convex part 1531 can be regarded as a crest, and the third elastic concave part 1532 can be regarded as a wave trough.
  • the axial direction from the conductive bearing 140 to the metal piece 110 includes the first elastic piece and the second elastic piece, that is, in the direction from top to bottom, the third elastic protrusion of the first elastic piece
  • the part 1531 (peak) corresponds to the third elastic recess 1532 (trough) of the second elastic piece below it and forms a buffer cavity 150b.
  • the third elastic protrusions 1531 (peaks) of the elastic pieces are connected to each other, so as to realize reliable connection performance between the first elastic piece and the second elastic piece.
  • connection means two or more, unless otherwise clearly defined.
  • connection can be fixed connection, detachable connection, or integral connection; “connection” can be directly or indirectly through an intermediary.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

本申请提供了一种电机和车辆,电机包括金属件、转子铁芯、转轴、导电轴承和弹性导电件,金属件接地设置,转子铁芯设于金属件的一侧,转子铁芯包括轴孔。转轴与转子铁芯相连,转轴穿设于轴孔内。导电轴承套设于转轴。弹性导电件的至少部分设在导电轴承和金属件之间。本申请中弹性导电件通过自身弹性变形产生压紧力,从而与导电轴承紧密接触,进而可以减小弹性导电件与导电轴承之间的接触电阻,起到对轴电流的引导作用,防止轴电流对电机的回转轴承的腐蚀,延长导电轴承、回转轴承的使用寿命。

Description

电机和车辆
本申请要求于2021年07月01日提交中国专利局、申请号为“202110748121.4”、申请名称为“电机和车辆”的中国专利申请的优先权,以及2021年08月25日提交中国专利局、申请号为“202110980877.1”、申请名称为“电机和车辆”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电机技术领域,具体而言,涉及一种电机和一种车辆。
背景技术
在电机将电能转换为机械能的过程中,电机采用脉宽调制逆变器,逆变器在向电机的励磁绕组供电时,会产生高频共模电压,该共模电压通过电机的寄生电容耦合至电机转子上形成轴电压,当轴电压超过电机转子上油膜的击穿电压阈值时,会在电机转子上形成轴电流,当轴电流泄放至电机转子的主轴承上时,会在主轴承的内外圈滚道上形成多条并行排布的电腐蚀纹路,即对主轴承造成电腐蚀,导致主轴承温度升高,加速主轴承的磨损并缩短主轴承寿命,同时也会对电机的震动噪声产生不良影响。为了解决上述问题,常常采用以下方式:
(1)设置绝缘轴承室以阻绝轴电流泄放至主轴承上,然而,设置绝缘轴承室制造工艺复杂,难度较大;
(2)在电机的转子与机壳之间增加导通轴电流的碳刷和弹簧机构,而加装碳刷和弹簧机构存在长时间运行磨损,维护困难,且碳刷粉末可能会掉落到电机腔体内,对电机的绝缘系统产生不良影响,容易引发绝缘击穿而导致电机故障等问题。
因此,如何获得一种制造工艺简单、结构合理且不会影响电机性能的防止轴电流腐蚀的结构,成为亟待解决的技术问题。
发明内容
本申请旨在至少解决现有技术或相关技术中存在的技术问题之一。
为此,本申请的第一方面提出了一种电机。
本申请的第二方面提出了一种车辆。
本申请的第三方面提出了一种电机。
本申请的第四方面提出了一种车辆。
有鉴于此,根据本申请的第一个方面,提供了一种电机,其包括金属件、转子铁芯、转轴、导电轴承和弹性导电件,转子铁芯设于金属件的一侧,转子铁芯包括轴孔。转轴与转子铁芯相连,转轴穿设于轴孔内。导电轴承套设于转轴。弹性导电件的至少部分设在导电轴承和金属件之间。
本申请提供的电机包括金属件、转子铁芯、转轴、导电轴承和弹性导电件,其中,转子铁芯设在金属件的一侧。具体地,金属件可以为电机的端盖,或者是电机的机壳等。当金属件为端盖时,端盖位于转子铁芯的轴向一侧。当金属件为机壳时,机壳围设在转子铁芯的周向外侧。转子铁芯具有轴孔,轴孔沿轴向贯穿设在转子铁芯上,转轴穿设于轴孔内,转轴与转子铁芯相连。具体地,转轴包括相背的两个外露端,分别为第一外露端和第二外露端,具体地,当电机应用于车辆时,电机可以作为驱动电机,第一外露端用于与车辆的车轮等负载连接,以在转轴转动时驱动车轮转动,实现动力输出。导电轴承套设在转轴上,导电轴承是独立于电机的回转轴承以外的附加轴承,起到连接转轴和弹性导电件的作用。进一步地,导电轴承套设在第二外露端上。弹性导电件的至少部分设在导电轴承和金属件之间,弹性导电件通过自身弹性变形产生压紧力,从而与导电轴承紧密接触,进而可以减小弹性导电件与导电轴承之间的接触电阻,起到对轴电流的引导作用,防止轴电流对电机的回转轴承的腐蚀,延长导电轴承、回转轴承的使用寿命,同时,通过弹性导电件的自身形变产生的压紧力来实现与导电轴承达到受力平衡,确保导电轴承受力均匀,也就是说,尽管导电轴承会随着转轴发生轴向以及径向的窜动,而由于弹性导电件的自适应能力,可以令弹性导电件一直稳定地与导电轴承接触,不会由于导电轴承窜动而无法有效接触,确保导电连通。同时,也能够防止导电轴承因应力集中损坏,避免导电轴承因为偏载力而出现异常磨损的情况。此外,本申请仅通过在转轴上套设导电轴承和弹性导电件,即可实现防腐蚀的作用,具有结构简单,布置合理、成本低廉、装配简单等优点。
具体地,关于电机的工作原理对于本领域普通技术人员而言都是已知的,这里不再详细描述。
需要说明的是,导电轴承包括内圈和套设在内圈外的外圈,内圈和外圈之间具有间隙。导电轴承还包括两个密封圈,两个密封圈分别密封在外圈与内圈沿轴线方向(即厚度方向)的两端之间,即两个密封圈分别密封在导电轴承沿轴线方向(即厚度方向)的两侧间隙,导电轴承的钢球密封在两个密封圈、内圈和外圈之间,内圈和外圈之间的空隙中填充有导电润滑脂,轴电流可以经过转轴泄漏至导电轴承的内圈,然后再通过导电润滑脂快速传导至外圈,从而确保导电轴承具有优良的导电性能。由于导电润滑脂的存在,导电轴承内圈和外圈之间的电阻减小,具有良好的导电性能,与回转轴承相比较,导电轴承的电阻更小。
进一步地,导电轴承几乎不会受到轴向以及径向的负载。具体地,导电轴承为深沟球轴承。
进一步地,导电轴承起到导通轴电流的作用,选用尺寸系列更小的导电轴承可以获得更好的高速性能和导电性能。因此,导电轴承的尺寸远小于回转轴承的尺寸。进一步地,导电轴承安装在转轴的尾端(第二外露端),导电轴承与弹性导电件紧密接触并导通。
进一步地,轴电流通过导电轴承的外圈后,再通过弹性导电件被引导至金属件处。
需要说明的是,弹性导电件在压缩状态下设于金属件和导电轴承之间,弹性导电件为了恢复原状而产生的反向力会压紧在导电轴承上。进一步地,关于弹性导电件与金属件的连接方式可以为二者直接连接,也可以为弹性导电件通过其他导电部件与金属件间接相连,也就是说,轴电流能够通过弹性导电件直接被引导至金属件处,也可以通过其他导电部件间接传递。
其中,金属件接地设置,可以实现轴电流经过金属件泄放至大地。
能够想到的是,本申请提供的电机,不仅可以应用于车辆领域,作为车辆的驱动电机,当然,也能够应用于家电设备领域,比如,空调设备、衣物处理设备、烹饪器具等。
在一种可能的设计中,进一步地,弹性导电件包括连接部和多个弹性部,多个弹性部分别与连接部相连,每个弹性部曲折延伸,弹性部设在导电轴承和金属件之间。
在该设计中,弹性导电件包括连接部和多个弹性部,连接部作为支撑结构,多个弹性部分别设置在连接部上,每个弹性部曲折延伸,从而令自身具有较大的弹性形变量。具体地,弹性部至少可以朝背离中心轴线的方向凸出,即每个弹性部至少朝外凸出,弹性部夹设在导电轴承和金属件之间,弹性部能够相对于连接部发生形变。朝外凸出设置的弹性部能够方便与金属件、导电轴承接触,同时也能够为自身形变提供一定的形变空间。
进一步地,弹性导电件为钣金冲压折弯件。连接部和多个弹性部为一体式结构,连接部和多个弹性部具体为一体式结构,因为一体式结构的力学性能好,因而能够提高连接部和多个弹性部之间的连接强度,另外,可将连接部和多个弹性部一体制成,批量生产,以提高产品的加工效率,降低产品的加工成本。并且,通过将连接部和多个弹性部设计为一体成型的一体式结构,提高了弹性导电件的整体性,减少了零部件数量,减少了安装工序,提高了安装效率,使弹性导电件的安装更为方便可靠。
在一种可能的设计中,进一步地,弹性部包括第一接触部和第二接触部,第一接触部与连接部相连,第一接触部朝背离中心轴线的方向凸出。第二接触部与第一接触部相连,第二接触部朝靠近中心轴线的方向凸出,第二接触部的至少一部分与导电轴承相接触。
在该设计中,弹性部包括第一接触部和第二接触部,其中,第一接触部与连接部相连,第一接触部朝背离中心轴线的方向凸出,即第一接触部朝外凸出,第一接触部的外表面能够与金属件相连,或者,第一接触部的外表面能够与其他导电部件相连。具体地,第一接触部具有相背离的第一端和第二端,第一接触部的第一端与连接部相连,第一接触部的第二端与第二接触部相连,第二接触部朝靠近中心轴线的方向凸出,即第二接触部朝内凸出,从而以便于第二接触部的至少一部分与导电轴承的外圈相接触。第一接触部和第二接触部整体呈S状,朝外凸出的第一接触部与金属件或其他导电部件连接,朝内凸出的第二 接触部与导电轴承的外圈接触,凸出方向相反的第一接触部和第二接触部能够便于弹性导电件压紧设在导电轴承上,且为导电轴承在使用过程中的偏载力提供更好的缓冲,以使导电轴承受力平衡而达到良好的导通状态。
在一种可能的设计中,进一步地,弹性部包括第一接触部和第二接触部,第一接触部的第一端弯曲后连接在连接部上,第一接触部的第二端沿轴向延伸。第二接触部与第一接触部的第二端相连,第二接触部朝背离或朝向中心轴线的方向卷曲。
在该设计中,弹性部包括第一接触部和第二接触部,第一接触部的第一端弯曲后连接在连接部上,第一接触部与连接部的连接处呈柔和过渡状,从而避免二者的连接处应力集中,一方面防止钣金加工过程中断裂,另一方面也为弹性部相对于连接部形变过程中提供更大的自由度。进一步地,第一接触部的第二端沿轴向延伸以形成朝向中心轴线的轴向内表面,轴向内表面与导电轴承的外圈接触,从而以与导电轴承紧密接触。第二接触部与第一接触部的第二端相连,第二接触部朝背离或朝向中心轴线的方向卷曲,呈卷曲状的第二接触部能够增强弹性部的整体结构强度,提升弹性导电件的使用寿命。具体地,当第二接触部朝背离中心轴线的方向卷曲时,第二接触部与导电连接件/金属件接触导通。
在一种可能的设计中,进一步地,弹性部设置在连接部的外周壁上。
在该设计中,连接部的外轮廓呈圆形,则连接部包括外周壁。每个弹性部的第一接触部均以连接部的外周壁为起始点,由于弹性导电件为钣金折弯件,受限于加工方式,第一接触部必然会在径向方向有一定的延伸。在转轴转动过程中,不可避免地,导电轴承会受到些许径向的偏载力,相较于其他端面而言,在径向上延伸的第一接触部能够起到很好的缓冲作用,防止弹性部受到径向力冲击而断裂。
在一种可能的设计中,进一步地,每个弹性部的至少一部分位于连接部的轴向一侧。
在该设计中,每个弹性部的至少一部分位于连接部的轴向一侧,即至少一部分弹性部在轴向上凸出于连接部设置,也就是说,连接部和弹性部能够形成安装导电轴承的安装位置,连接部不仅起到设置弹性部的作用,还能够为导电轴承提供支撑作用。具体来说,转轴上设有限位台阶,导电轴承套设在转轴上,导电轴承的轴向第一端抵接在限位台阶上,导电轴承的轴向第二端抵接在弹性部和连接部构成的安装位置内。
此外,位于连接部轴向一侧的弹性部,在发生形变时不会受到连接部的干扰,而能够直接将弹力传递至导电轴承,从而确保弹性部与导电轴承之间夹紧配合。
在一种可能的设计中,进一步地,弹性导电件包括多个连接部和多个弹性部,多个弹性部中任一个弹性部连接在两个连接部之间,每个弹性部朝背离或朝向中心轴线的方向凸出。
在该设计中,弹性导电件包括多个连接部和多个弹性部,多个弹性部中任 一个弹性部连接在两个连接部之间,即多个弹性部和多个连接部首尾相连构成弹性导电件,每个弹性部朝背离或朝向中心轴线的方向凸出,即弹性部呈波形弯曲结构,呈弯曲结构的弹性部能够发生形变,从而夹紧设在导电轴承上。需要说明的是,位于两个弹性部之间的连接部可以呈平直状,折弯状,连接部不仅能够起到连接功能,还能够与导电轴承接触,将弹性部产生的弹力传递至导电轴承的外周壁上,从而实现弹性导电件夹紧设置在导电轴承上,令二者之间的接触电阻较小,从而使得轴电流更容易经由导电轴承、弹性导电件传递至金属件处,进而以实现接地,明显降低对于回转轴承的腐蚀。
具体地,当连接部呈平直状时,则连接部能实现支撑作用,且还能够传递弹性部所产生的作用力。
在一种可能的设计中,进一步地,多个连接部中至少一个连接部呈弯曲状。
在该设计中,一个连接部呈弯曲状,则该连接部自身也能够发生形变以产生弹力,那么,对于导电轴承而言,其所承受的夹紧力,不仅来自于弹性部,还能够来自于弯曲状的连接部,在有限的空间内,实现夹紧力最大化,确保弹性导电件和导电轴承之间的夹紧效果。
在一种可能的设计中,进一步地,多个弹性部中每个弹性部朝背离中心轴线的方向凸出形成第一弹性部,多个连接部中每个连接部朝背离中心轴线的方向弯曲形成第一连接部。每个第一连接部包括朝向中心轴线的壁面为圆弧面,圆弧面与导电轴承相接触。
在该设计中,每个弹性部朝背离中心轴线的方向凸出,形成朝外凸出的第一弹性部,每个连接部朝背离中心轴线的方向弯曲,即每个连接部朝外弯曲形成第一连接部,第一连接部包括靠内的圆弧面,当弹性导电件设置在导电轴承上时,圆弧面能够与导电轴承的外周壁接触,从而增加二者的接触面积,弹性部和第一连接部形变所产生的弹力都能够通过圆弧面施加于导电轴承上。
在一种可能的设计中,进一步地,多个弹性部中每个弹性部朝向中心轴线的方向凸出形成第二弹性部,第二弹性部包括朝向中心轴线的接触部,接触部与导电轴承相接触。多个连接部中每个连接部朝背离中心轴线的方向弯曲形成第一连接部。
在该设计中,多个弹性部中每个弹性部朝向中心轴线的方向凸出形成第二弹性部,即第二弹性部朝内凸出设置,第二弹性部包括朝向中心轴线的接触部,接触部与导电轴承相接触,多个连接部中每个连接部朝背离中心轴线的方向弯曲形成第一连接部,即第一连接部朝外凸出,第一连接部包括背离中心轴线的圆弧面,圆弧面能够与金属件或导电连接件接触。
在一种可能的设计中,进一步地,多个弹性部中每个弹性部朝背离中心轴线的方向凸出形成第一弹性部,多个连接部中每个连接部朝靠近中心轴线的方向凸出形成第二连接部。每个第二连接部包括朝向中心轴线接触端,接触端抵接在导电轴承的外周。
在该设计中,每个弹性部朝背离中心轴线的方向凸出,即弹性部朝外凸出,多个连接部中每个连接部朝靠近中心轴线的方向凸出,即每个连接部朝内弯曲 凸出以形成第二连接部。每个第二连接部包括朝向中心轴线接触端,即每个第二连接部包括朝内凸出的接触端,接触端抵接在导电轴承的外周。弹性部、第二连接部产生的弹力会通过接触端传递至导电轴承的外壁。
需要说明的是,多个连接部、多个弹性部分别均匀间隔设置,从而能够确保导电轴承受力平衡,不会受到偏载力而发生倾斜。
具体地,连接部呈弧形段,多个弧形段和朝外凸出的弹性部间隔相连,弧形段和弹性部均可提供形变量。弧形段能够与导电轴承的外圈接触,弹性部能够与导电连接件接触连通,连接部和弹性部整体发生弹性形变,从而使得弹性导电件处于压缩状态下夹设在导电轴承和导电连接件之间。
可以想到的,每个弹性部朝背离中心轴线的方向凸出,弧形段可以朝背离中心轴线的方向弯曲,也可以朝靠近中心轴线的方向弯曲。即弹性部和弧形段整体呈波浪状结构。在一种可能的设计中,进一步地,弹性导电件还包括释放口,释放口设于多个连接部中的任一个上。
在该设计中,弹性导电件还包括释放口,释放口设于多个连接部中的任一个上,释放口能够为弹性导电件整体提供圆周方向上的自由度,可以避免由于弹性部和连接部形变而产生的过大的变形和应力,释放口能够提供较大的形变范围,对弹性部和连接部形变过程中的应力进行释放。
在一种可能的设计中,进一步地,释放口沿弹性导电件的轴向贯穿设置。
在该设计中,释放口沿弹性导电件的轴向贯穿设置,从而能够令弹性导电件各处所受到的过大应力、过大形变量都可以通过对应位置处的部分释放口进行释放,从而提高弹性导电件的疲劳安全系数。
在一种可能的设计中,进一步地,释放口位于连接部的中心。
在该设计中,释放口沿轴向贯穿设在连接部上,令具有释放口的连接部为目标连接部,而与目标连接部相连的两个弹性部为第一弹性部和第二弹性部。当释放口位于连接部的中心时,则释放口距离第一弹性部的距离、释放口距离第二弹性部的距离相等,即第一弹性部和第二弹性部彼此靠近的端部均留有等长度的连接结构,从而确保第一弹性部和第二连接部的可靠支撑性能。比如,当释放口靠近一个弹性部设置时,则对于该弹性部而言,由于一侧连接部缺失,则弹性导电件的结构不对称,此时,多个弹性部作用于导电轴承的夹紧力的合力则不为零,容易令导电轴承受力不平衡而受到磨损。
在一种可能的设计中,进一步地,多个弹性部均匀间隔分布。
在该设计中,均匀间隔分布的弹性部可以令导电轴承受到合力为零的夹紧力,防止导电轴承由于弹性导电件的设置而受力不均衡发生偏移而磨损加剧。
具体地,当弹性导电件包括多个弹性部和一个连接部,比如,当弹性部的数量为3个时,三个弹性部的结构大小均相同,三个弹性部均匀分布在连接部上,即三个弹性部中相邻两个弹性部之间的间隔为120°。三个弹性部通过弹性变形,夹紧在导电轴承的外圈上。可以理解的是,由于三个弹性部均匀分布在连接部上,并且由于结构大小均相同,即三个弹性部所产生的夹紧力相同,从而令三个弹性部对导电轴承的合力为零,可以避免由于结构不对称使得三个 弹性部产生一个沿导电轴承径向的合力,进而对导电轴承的寿命产生不良影响,通过弹性部产生的弹力以令弹性部与导电轴承之间充分接触,进而减小接触电阻,形成良好的导通通路。或者,当弹性部的数量为4个时,4个弹性部分为两组,即每组包含两个弹性部,每组弹性部在呈环形结构的连接部上沿直径方向对称分布,两组弹性部均匀分布,即相邻两个弹性部之间的夹角为90°,即两组弹性部的连线互相垂直。进一步的,由于两组弹性部均匀对称的分布在连接部上,并且产生的夹紧力相同,进而两组弹性部对导电轴承的合力为零,避免由于结构不对称对使两组弹性部产生一个沿导电轴承径向的合力,进而对导电轴承寿命产生不良影响。通过弹片部产生的弹力的目的仅是为了同导电轴承充分接触,进而减小接触电阻,形成良好的导通通路。
具体地,当弹性导电件包括多个弹性部和多个连接部,比如,弹性部的数量为3个,连接部的数量为3个,释放口的数量为1个,3个弹性部和3个连接部交替连接,释放口设在一个连接部的中心。3个弹性部均匀分布在3个连接部之间,即3个弹性部中相邻两个弹性部之间的间隔角度为120°。或者,弹性部的数量为4个,连接部的数量为4个,相邻两个弹性部之间的夹角为90°。
在一种可能的设计中,进一步地,电机还包括避让口,避让口设于弹性导电件上,导电轴承的至少一部分位于避让开口中。
在该设计中,弹性导电件还包括避让口,避让口设在弹性导电件上,避让口能够避开导电轴承的内圈,内圈与转轴过盈配合,内圈会随同转轴同步转动。导电轴承的外圈与弹性导电件接触导通,外圈与弹性导电件位置静止,不会随同转轴运动而转动。具体地,避让口沿轴向贯穿设在弹性导电件上。比如,弹性导电件包括设置在连接部上多个弹性部,避让口设在连接部上,此时,连接部呈环形结构。弹性导电件包括多个连接部和多个弹性部,一个连接部连接在相邻两个弹性部之间,多个连接部和多个弹性部连接围合形成避让口。
也就是说,由于避让口的设置,弹性导电件呈中空结构,从而可以避免弹性导电件和导电轴承的内圈接触,若弹性导电件呈非中空结构,则导电轴承的内圈的轴向端部会与弹性导电件接触,产生摩擦转矩而干扰导电轴承的转动。
在一种可能的设计中,进一步地,连接部和弹性部的连接处圆角过渡。
在该设计中,连接部与弹性部的连接处存在较大应力值和应力集中现象,通过令该连接处圆角过渡,随着圆角半径的增大而减小,应力分布更趋于均匀,从而提高了弹性导电件的疲劳安全系数。
在一种可能的设计中,进一步地,弹性导电件为钣金件。
在该设计中,弹性导电件为钣金冲压折弯件。连接部和多个弹性部为一体式结构,连接部和多个弹性部具体为一体式结构,因为一体式结构的力学性能好,因而能够提高连接部和多个弹性部之间的连接强度,另外,可将连接部和多个弹性部一体制成,批量生产,以提高产品的加工效率,降低产品的加工成本。并且,通过将连接部和多个弹性部设计为一体成型的一体式结构,提高了弹性导电件的整体性,减少了零部件数量,减少了安 装工序,提高了安装效率,使弹性导电件的安装更为方便可靠。
在一种可能的设计中,进一步地,电机还包括导电连接件,导电连接件能够与金属件相连,弹性导电件的至少部分位于导电连接件和导电轴承之间。
在该设计中,电机还包括导电连接件,导电连接件分别与金属件和弹性导电件连接,也就是说,为了实现轴电流的引流,弹性导电件处的轴电流未直接与金属件相连,而是通过导电连接件引导至金属件处,通过设置导电连接件,在确保导电连通的前提下,可以简化装配过程,降低制备难度。
具体地,导电连接件为铝合金铸造件,具体地,导电连接件呈板状结构,导电连接件安装在电机的端盖上,导电连接件与端盖充分接触导通。
在一种可能的设计中,进一步地,导电连接件包括板体和安装部,板体能够与金属件相连。安装部朝向转轴设在板体上,安装部包括安装位,弹性导电件的至少一部分设置在安装位处。
在该设计中,导电连接件包括板体和安装部,板体能够与金属件相连。安装部朝向转轴设在板体上,即安装部轴向延伸设在板体上。安装部包括安装位,弹性导电件的至少一部分设置在安装位处,方便弹性导电件的安装定位。
进一步地,板体和安装部为一体式结构。
在一种可能的设计中,进一步地,安装部包括支撑部和抵接部,支撑部设于板体上。抵接部连接在支撑部的轴向端部,安装位设置在抵接部和支撑部之间,弹性导电件分别与抵接部和支撑部接触。
在该设计中,安装部包括支撑部和抵接部,支撑部沿轴向延伸设于板体上。抵接部连接在支撑部的轴向端部,安装位设置在抵接部和支撑部之间,支撑部呈环形结构、抵接部也呈环形结构,支撑部的内径大于抵接部的内径,即安装位呈现为环形台阶位(环形沉孔)。在装配过程中,由于环形沉孔的直径大于导电轴承的外径(即导电轴承外圈的外径),沉孔与导电轴承为同心结构,在抵接部和导电轴承之间会形成环形的安装空间,该安装空间用于容纳弹性导电件的至少一部分。弹性导电件通过弹性变形而与导电轴承、安装部充分接触,进而形成良好的导电通路。
需要说明的是,轴电流包括两个导电通路,其一为依次通过转轴、导电轴承、弹性导电件、导电连接件和金属件。其二为依次经过转轴、回转轴承和端盖。而由于导电通路一的电阻小于导电通路二,即轴电流会优先从导电通路一传递,防止轴电流对回转轴承的腐蚀,延长回转轴承的使用寿命。
进一步地,支撑部能够对导电轴承和弹性导电件构成轴向限位,抵接部能够为导电轴承和弹性导电件构成径向限位,在确保导电接触的前提下,也便于弹性导电件和导电轴承的定位安装。
在一种可能的设计中,进一步地,抵接部包括抵接壁、轴侧壁和导向部,抵接壁朝向弹性导电件。轴侧壁背离支撑部。导向部设于抵接壁与轴侧壁的连接处。
在该设计中,抵接部包括抵接壁、轴侧壁和导向部,抵接壁朝向弹性导电件,弹性导电件能够与抵接壁接触。轴侧壁背离支撑部设置。导向部设于抵接 壁与轴侧壁的连接处。当弹性导电件安装于支撑部和抵接壁所形成的安装位时,导向部能够方便弹性导电件安装,降低装配难度。
值得说明的是,导向部可以为导向弧面、导向斜面等。
具体地,当导向部包括导向斜面时,导向斜面的轴向深度h大于0mm,小于等于5mm,导向斜面与抵接壁所在切面之间的夹角大于0°,小于等于30°,在实现导向作用的基础上,也不会削弱抵接部对于弹性导电件的限位作用。
在一种可能的设计中,进一步地,支撑部具有朝向转轴开口的中空腔。
在该设计中,支撑部具有朝向转轴开口的中空腔,中空腔能够避免导电连接件和导电轴承的内圈接触,若导电连接件呈非中空结构,则导电轴承的内圈的轴向端部会与导电连接件接触,产生摩擦转矩而干扰导电轴承的转动。
在一种可能的设计中,进一步地,金属件包括端盖,端盖设在转子铁芯的轴向一侧,弹性导电件的至少一部分设在端盖与导电轴承之间。
在该设计中,金属件包括端盖,端盖设在转子铁芯的轴向一侧。具体地,端盖靠近转轴的第二外露端设置,即端盖为后端盖。弹性导电件的至少一部分设在端盖与导电轴承之间,端盖距离导电轴承的位置较近,能够快速将轴电流引导出,同时也能够节省弹性导电件、导电连接件的材料成本,令导电通路的布置更加合理化。
在一种可能的设计中,进一步地,导电轴承的内径为D1,导电轴承的内外圈电阻为R1。电机还包括回转轴承,回转轴承套设在转轴上,回转轴承位于导电轴承背离端盖的一侧,回转轴承的内径为D2,回转轴承的内外圈电阻为R2,其中,D1<D2,R1<R2。
在该设计中,金属件与回转轴承之间的电阻,大于金属件与导电轴承之间的电阻,从而使得轴电流能够优先从导电轴承所在通路流出。需要说明的是,回转轴承起到回转支撑转轴的作用。回转轴承内外圈之间的电阻大于导电轴承的内外圈电阻,回转轴承的内径大于导电轴承的内径,进一步地利于轴电流通过导电轴承与金属件连接,防止轴电流对回转轴承的腐蚀,延长轴承的使用寿命。
根据本申请的第二个方面,提供了一种车辆,包括上述任一设计所提供的电机。本申请提供的车辆,包括上述任一设计所提供的电机,因此具有该电机的全部有益效果,在此不再赘述。值得说明的是,车辆可以为新能源汽车。其中,新能源汽车包括纯电动汽车、增程式电动汽车、混合动力汽车、燃料电池电动汽车、氢发动机汽车等。
根据本申请的第三个方面,提供了一种电机,其包括金属件、转子铁芯、转轴、导电轴承和弹性导电件,其中,金属件接地,转子铁芯设于金属件的一侧,转子铁芯包括轴孔,转轴与转子铁芯相连,转轴穿设于轴孔内,导电轴承套设于转轴上,弹性导电件位于导电轴承背离转子铁芯的轴向一侧,弹性导电件的至少一部分分别与导电轴承和金属件接触。
本申请提供的电机包括金属件、转子铁芯、转轴、导电轴承和弹性导 电件,其中,转子铁芯设在金属件的一侧。具体地,金属件可以为电机的端盖,或者是电机的机壳等。当金属件为端盖时,端盖位于转子铁芯的轴向一侧。当金属件为机壳时,机壳围设在转子铁芯的周向外侧。转子铁芯具有轴孔,轴孔沿轴向贯穿设在转子铁芯上,转轴穿设于轴孔内,转轴与转子铁芯相连。具体地,转轴包括相背的两个外露端,分别为第一外露端和第二外露端,具体地,当电机应用于车辆时,电机可以作为驱动电机,第一外露端用于与车辆的车轮等负载连接,从而在转轴转动时能够驱动车轮转动,实现动力输出。导电轴承套设在转轴上,导电轴承是独立于电机的回转轴承以外的附加轴承,导电轴承起到连接转轴和弹性导电件的作用。进一步地,导电轴承套设在第二外露端上,也就是说,导电轴承套设在转轴的非负载端部。其中,弹性导电件位于导电轴承背离转子铁芯的轴向一侧,且弹性导电件的至少部分设在导电轴承和金属件之间,也就是说,导电轴承和金属件之间存在轴向延伸的间隙,弹性导电件的至少部分位于该间隙内,弹性导电件的轴向一侧与导电轴承接触,弹性导电件的轴向另一侧与金属件接触,不仅能够令弹性导电件自身的加工更加方便,与此同时也能减小弹性导电件的装配难度。同时,弹性导电件通过自身弹性变形产生压紧力,从而可以紧密夹设于导电轴承和金属件之间,实现分别与导电轴承和金属件紧密接触,进而可以减小金属件、弹性导电件和导电轴承之间的接触电阻,起到对轴电流的引导作用,防止轴电流对电机的回转轴承的腐蚀,延长导电轴承、回转轴承的使用寿命。同时,弹性导电件能够产生的弹力在一定范围内,也就是说,随着导电轴承受力不同时,则弹性导电件能够根据导电轴承传递的作用力适应性调整,即能够通过弹性导电件的自身形变产生的压紧力来实现与导电轴承达到受力平衡,确保导电轴承受力均匀,也就是说,尽管导电轴承会随着转轴发生轴向以及径向的窜动,而由于弹性导电件的自适应能力,可以令弹性导电件一直稳定地分别与导电轴承和金属件接触,不会由于导电轴承被转轴带动偏移而无法有效接触,确保导电连通。与此同时,弹性导电件也能够防止导电轴承因应力集中损坏,避免导电轴承因为偏载力而出现异常磨损的情况。此外,本申请仅通过在转轴上套设导电轴承和弹性导电件,即可实现防腐蚀的作用,具有结构简单,布置合理、成本低廉、装配简单等优点。
具体地,关于电机的工作原理对于本领域普通技术人员而言都是已知的,这里不再详细描述。
需要说明的是,导电轴承包括轴承内圈和套设在轴承内圈外的轴承外圈,轴承内圈和轴承外圈之间具有空隙。导电轴承还包括两个密封圈,两个密封圈分别密封在轴承外圈与轴承内圈沿轴线方向(即厚度方向)的两端之间,即两个密封圈分别密封在导电轴承沿轴线方向(即厚度方向)的两侧空隙,导电轴承的钢球密封在两个密封圈、轴承内圈和轴承外圈之间,轴承内圈和轴承外圈之间的空隙中填充有导电润滑脂,轴电流可以经过转轴泄漏至导电轴承的轴承内圈,然后再通过导电润滑脂快速传导至轴承外 圈,从而确保导电轴承具有优良的导电性能。由于导电润滑脂的存在,轴承内圈和轴承外圈之间的电阻减小,具有良好的导电性能,与回转轴承相比较,导电轴承的电阻更小。具体地,导电轴承为深沟球轴承。
进一步地,导电轴承起到导通轴电流的作用,选用尺寸系列更小的导电轴承可以获得更好的高速性能和导电性能。因此,导电轴承的尺寸远小于回转轴承的尺寸。进一步地,导电轴承安装在转轴的尾端(非负载端部,第二外露端),导电轴承与弹性导电件紧密接触并导通。
进一步地,轴电流通过导电轴承的轴承外圈后,再通过弹性导电件被引导至金属件处。
需要说明的是,弹性导电件在压缩状态下设于金属件和导电轴承之间,弹性导电件为了恢复原状而产生的反向作用力会压紧在导电轴承和金属件上。进一步地,关于弹性导电件与金属件的连接方式可以为二者直接连接,也可以为弹性导电件通过其他导电部件与金属件间接相连,也就是说,轴电流能够通过弹性导电件直接被引导至金属件处,也可以通过其他导电部件间接传递。
其中,金属件接地设置,可以实现轴电流经过金属件泄放至大地。
能够想到的是,本申请提供的电机,不仅可以应用于车辆领域,作为车辆的驱动电机,当然,也能够应用于家电设备领域,比如,空调设备、衣物处理设备、烹饪器具等。
在一种可能的设计中,进一步地,弹性导电件与金属件和导电轴承中至少一者之间具有缓冲空间。
在该设计中,弹性导电件可以与金属件之间具有缓冲空间,和/或,弹性导电件与导电轴承之间具有缓冲空间。弹性件导电件受到导电轴承和金属件的挤压,从而稳定安装于二者之间的间隙内,实现导电轴承、弹性导电件和金属件之间的紧密接触,进而形成良好的导电通路。
需要说明的是,弹性导电件与金属件和/或导电轴承之间形成的缓冲空间,一方面能够提升装配可靠性,适应于多变的安装环境,金属件和导电轴承之间的安装间隙在轴向上具有标准高度,在实际装配过程中,安装间隙的轴向高度可能会存在些许偏差,缓冲空间则允许弹性导电件在轴向上的进一步形变,以适应于不同的安装环境。另一方面,在电机运行过程中,转轴可能会存在轴向上的窜动,与此同时,位于转轴上的导电轴承也会存在轴向位移,此时,弹性导电件会受到进一步压缩,弹性导电件和其轴向两侧的导电轴承、金属件之间的缓冲空间,则会为进一步压缩提供可能性,可以为导电轴承的轴向窜动提供缓冲余量,防止处于导电轴承和金属件之间的弹性导电件处于压缩最大状态,而无法承载电机运行过程中可能存在的进一步压缩,避免导电轴承、弹性导电件和金属件之间存在轴向上的硬性接触,降低导电轴承、弹性导电件和金属件的磨损率,提升电机产品的使用寿命。
在一种可能的设计中,进一步地,弹性导电件包括相连部和至少两个弹力部,至少两个弹力部分别与相连部相连,至少两个弹力部中每个弹力部相较于 相连部的曲折延伸以形成缓冲空间。
在该设计中,弹性导电件包括相连部和弹力部,相连部能够为弹力部提供结构支撑,即相连部能够起到支撑作用。弹力部相对于相连部曲折延伸,具体地,弹力部相较于相连部至少沿轴向曲折延伸,弹力部与导电轴承之间和/或金属件之间可以形成缓冲空间。在导电轴承和金属件的挤压作用下,弹力部能够相较于相连部发生形变,从而提供反向弹力,以使弹性导电件夹紧于导电轴承和金属件之间。
具体地,弹力部相较于相连部而言外凸设置,也就是说,弹力部超出相连部显露出来,从而以方便弹力部和导电轴承和/或金属件接触。
需要说明的是,当弹力部相较于相连部的延伸方向不同、外凸方向不同时,则弹性导电件与导电轴承和金属件的接触位置可能会存在各异。
比如,在一种可能的设计中,弹力部与导电轴承接触,相连部与金属件接触。在另一种可能的设计中,弹力部与金属件接触,相连部与导电轴承接触。在又一种可能的设计中,弹力部的外凸方向不同,可能一种外凸方向的弹力部与导电轴承接触,另一种外凸方向的弹力部与金属件接触,在该设计中,相连部与导电轴承和金属件之间均不接触。
能够想到地是,相连部的主要作用用于连接支撑弹力部,当相连部用于与导电轴承或金属件接触时,可以令相连部在轴向上呈波折状,那么相连部也能够具有一定的可形变作用,在弹力部的基础上进一步为弹性导电件整体增加可形变能力。
进一步地,弹力部的数量为至少两个,至少两个弹力部均匀设置在相连部上。
在该设计中,均匀设置在相连部上的弹力部,能够令导电轴承的受力均衡,防止导电轴承由于弹性导电件的设置而受力不均衡发生偏移而磨损加剧。
在一种可能的设计中,进一步地,至少两个弹力部中一个弹力部朝向导电轴承凸出形成第一弹性凸部,第一弹性凸部与导电轴承接触,至少两个弹力部中另一个弹力部背离导电轴承凹陷形成第一弹性凹部,第一弹性凹部与金属件接触。
在该设计中,弹力部的数量为至少两个,至少两个弹力部包括第一弹性凸部和第二弹性凸部,第一弹性凸部相较于相连部而言朝向导电轴承凸出,第一弹性凸部与导电轴承相接触,第二凸出相较于相连部而言背离导电轴承凹陷,第二弹性凸部与金属件接触,第一弹性凸部与金属件之间具有第一缓冲空间,第二弹性凸部与导电轴承之间具有第二缓冲空间,在电机运行过程中,第一弹性凸部受到导电轴承的作用力会被压缩,此时,第一弹性凸部具有朝向金属件运动的趋势,此时第一缓冲空间的容积会减小。同理,与此同时,第二弹性凸部受到金属件的作用力会被压缩,此时,第二弹性凸部具有朝向导电轴承运动的趋势,此时第二缓冲空间的容积会减小。在第一弹性凸部和第二弹性凸部分别朝各自相较于相连部外露方向的反向运动时,进而以为弹性导电件提供进一步的压缩可能性,使得在电机运行过程中,金属件、弹性导电件、导电轴承之 间仍旧为柔性接触,降低导电轴承、弹性导电件和金属件的磨损率,提升电机产品的使用寿命。
在一种可能的设计中,进一步地,第一弹性凸部的数量为至少两个,第一弹性凹部的数量为至少两个,至少两个第一弹性凸部中任一者位于至少两个第一弹性凹部中相邻的两个之间。
在该设计中,第一弹性凸部的数量为至少两个,第一弹性凹部的数量也为至少两个,一个第一弹性凸部位于相邻两个第二弹性凸部之间,即第一弹性凸部和第二弹性凸部一个接一个间隔排布。对于弹性导电件而言,具有朝向导电轴承的第一轴侧,也包括朝向金属件的第二轴侧,对于第一轴侧而言,具有多个间隔排布的第一弹性凸部以与导电轴承接触,对于第二轴侧而言,具有相同个数的第二弹性凸部以与金属件接触,从而为导电轴承和金属件提供基本等同的弹力支撑。
与此同时,对于弹性导电件而言,第一弹性凸部受到导电轴承施加的作用力,与之相邻的第一弹性凹部则会受到金属件施加的反向作用力,即弹性导电件自身的受力方向多样,防止弹性导电件在同一方向作用力过于集中而可能存在的疲劳断裂,提升弹性导电件的结构稳定性。
在一种可能的设计中,进一步地,至少两个弹力部分别朝靠近导电轴承的方向凸出形成第二弹性凸部,至少两个第二弹性凸部分别与导电轴承接触,相连部与金属件接触。
在该设计中,至少两个弹力部中每个弹力部都朝向导电轴承凸出形成第二弹性凸部,第二弹性凸部相较于相连部而言朝向导电轴承凸出,第二弹性凸部与导电轴承相接触,与此同时,第二弹性凸部与金属件之间具有缓冲空间,在电机运行过程中,第二弹性凸部具有朝向金属件运动的趋势,缓冲空间的容积减小,从而为弹性导电件提供进一步的压缩可能性,使得弹性导电件和导电轴承之间为柔性接触,降低导电轴承和弹性导电件之间磨损率,提升电机产品的使用寿命。相连部此时不仅起到支撑连接第二弹性凸部的作用,还起到与金属件接触连接的作用,以实现转轴、导电轴承、导电连接件与金属件之间的导通连接。
需要说明的是,弹性导电件中的弹力部均朝同一方向凸出设置,从而可以减小弹性导电件的加工难度和装配难度。
在一种可能的设计中,进一步地,相连部为连接曲部,连接曲部的数量为至少两个,至少两个连接曲部中任一个连接曲部分别与至少两个弹力部中相邻两个弹力部相连。
在该设计中,至少两个弹力部可以通过至少两个连接曲部实现连接,其中,多个连接曲部中任一个连接曲部连接在相邻的两个弹力部之间,即至少两个连接曲部和至少两个弹力部首尾相连构成弹性导电件。其中,至少两个弹力部可以朝靠近导电轴承的方向凸出形成弹性凸部,也可以背离导电轴承凹陷以形成弹性凹部。即至少两个连接曲部之间可以连接第一弹性凸部/第一弹性凹部/第二弹性凸部之间的任意组合。
具体地,当弹力部包括第一弹性凸部和第一弹性凹部时,第一弹性凸部和第一弹性凹部分别连接在两个连接曲部之间,此时,弹性导电件整体呈波形弯曲结构,朝向导电轴承凸出的第一弹性凸部可以视为波峰,背离导电轴承凹陷的第一弹性凹部可以视为波谷,连接曲部可以视为波峰和波谷之间的过渡部。第一弹性凸部和第一弹性凹部产生的弹力可以传递至导电轴承和金属件处,令弹性导电件夹紧设置在金属件和导电轴承之间,令二者之间的接触电阻变小,使得轴电流更容易经由导电轴承、弹性导电件传递至金属件处,进而以实现接地,明显降低对于回转轴承的腐蚀。而具体地,当弹力部包括第二弹性凸部时,则每个第二弹性凸部均连接在相邻两个连接曲部之间。
在一种可能的设计中,进一步地,相连部为连接环,至少两个第二弹性凸部分别设置在相连部的外周沿。
在该设计中,相连部为连接环,连接环的外轮廓呈圆形,连接环包括外周沿,至少两个第二弹性凸部分别设置在相连部的外周沿。对于每个第二弹性凸部而言,第二弹性凸部包括相背的连接端和接触端,连接端设置在相连部的外周沿上,接触端至少沿轴向延伸以与导电轴承接触,对于第二弹性凸部自身而言,由于弹性导电件为钣金折弯件,受限于加工方式,连接端必然会在径向方向有一定的延伸。在转轴转动过程中,不可避免地,导电轴承会受到些许径向上的偏载力,与此同时,导电轴承会把至少部分径向上偏载力传递至弹性导电件,那么对于弹性导电件而言,在径向上延伸的连接端能够起到很好的缓冲作用,防止第二弹性凸部受到径向力冲击而断裂。
在一种可能的设计中,进一步地,至少两个第二弹性凸部中每个第二弹性凸部的一部分沿着相连部的外周沿延伸以形成延伸段,至少两个第二弹性凸部中相邻两个第二弹性凸部的延伸段彼此靠近并连接。
在该设计中,第二弹性凸部连接端和接触端,连接端设置在相连部的外周沿上,与此同时,相邻两个第二弹性凸部的一部分彼此靠近延伸形成延伸段,相邻两个第二弹性凸部的延伸段相互靠近并连接,也就是说,对于每个第二弹性凸部而言,其与相连部的接触面积有效增加,与此同时,相邻两个第二弹性凸部之间也存在相互连接,从而可以令第二弹性凸部的结构稳定性更佳,在一个第二弹性凸部受力后发生形变时,与之相邻的第二弹性凸部和相连部均能够为其提供结构支撑,延长弹性导电件的使用寿命。
在一种可能的设计中,进一步地,至少两个弹力部分别朝远离导电轴承的方向凹陷形成第二弹性凹部,至少两个第二弹性凹部与金属件接触,相连部与导电轴承接触。
在该设计中,至少两个弹力部中每个弹力部都朝背离导电轴承凹陷形成第二弹性凹部,第二弹性凹部相较于相连部而言背离导电轴承凹陷,第二弹性凹部与金属件相接触,与此同时,第二弹性凹部与导电轴承之间具有缓冲空间,在电机运行过程中,第二弹性凹部具有朝向导电轴承运动的趋势,缓冲空间的容积减小,从而为弹性导电件提供进一步的压缩可能性,使得弹性导电件和金属件之间为柔性接触,金属件和弹性导电件之间磨损率,提升电机产品的使用 寿命。相连部此时不仅起到支撑连接第二弹性凹部的作用,还起到与导电轴承接触连接的作用,以实现转轴、导电轴承、导电连接件与金属件之间的导通连接。
需要说明的是,弹性导电件中的弹力部均朝同一方向凸出设置,从而可以减小弹性导电件的加工难度和装配难度。
在一种可能的设计中,进一步地,弹性导电件具有多个缓冲腔。
在该设计中,弹性导电件不仅与导电轴承和/或金属件之间形成缓冲空间,与此同时,弹性导电件自身还具有多个缓冲腔,在弹性导电件受压缩的过程中,缓冲空间和多个缓冲腔均能够为弹性导电件提供反向弹力,多个缓冲腔能够为弹性导电件提供弹力储备,使得弹性导电件面对多变的安装间隙时,均能够成功装配于安装间隙内,使得弹性导电件压缩设在导电轴承和金属件之间,与导电轴承和金属件均紧密接触,减小金属件、弹性导电件和导电轴承之间的接触电阻,起到对轴电流的引导作用,防止轴电流对电机的回转轴承的腐蚀,延长导电轴承、回转轴承的使用寿命。
需要说明的是,金属件和导电轴承之间的安装间隙在轴向上具有标准高度,在实际装配过程中,安装间隙的轴向高度可能会存在些许偏差,即导致安装间隙的多变。
进一步地,弹性导电件的内部呈蜂窝状,不仅能够保证自身的结构强度,不易因外部施加的作用力而发生断裂,与此同时还能够为弹性导电件提供进一步的压缩可能性。
在一种可能的设计中,进一步地,弹性导电件包括多个沿轴向堆叠的弹片,多个弹片中每个弹片包括第三弹性凸部和第三弹性凹部,第三弹性凸部朝向导电轴承凸出,第三弹性凹部与第三弹性凸部相连,第三弹性凹部背离导电轴承凹陷,其中,多个弹片包括第一弹片和位于第一弹片背离导电轴承一侧的第二弹片,第一弹片的第三弹性凸部与第二弹片的第三弹性凹部之间具有多个缓冲腔中的一个,第一弹片的第三弹性凹部与第二弹片的第三弹性凸部相连。
在该设计中,弹性导电件包括多个轴向堆叠的弹片,每个弹片的结构相同,相邻两个弹片之间具有旋转角度,以使相邻两个弹片错位堆叠。具体地,每个弹片包括相连的第三弹性凸部和第三弹性凹部,第三弹性凸部朝向导电轴承凸出,第三弹性凹部背离导电轴承凹陷,第三弹性凸部和第三弹性凹部的数量一一对应,第三弹性凸部的数量为至少一个,第三弹性凹部的数量为至少一个,第三弹性凸部和第三弹性凹部首尾相连以形成一个弹片。比如,当第三弹性凸部为2个时,第三弹性凹部也为2个,每个第三弹性凹部连接相邻两个第三弹性凹部之间。弹片整体呈波形弯曲结构,第三弹性凸部可以视为波峰,第三弹性凹部可以视为波谷。在多个弹片错位堆叠的过程中,自导电轴承向金属件的轴向方向上包括第一弹片和第二弹片,即自上而下的方向上,第一弹片的第三弹性凸部(波峰)与位于其下方的第二弹片的第三弹性凹部(波谷)相对应并形成一个缓冲腔,第一弹片的第三弹性凹部(波谷)和位于其下方的第二弹片的第三弹性凸部(波峰)相连,进而实现第一弹片和第二弹片之间的可靠连接 性能。
在一种可能的设计中,进一步地,相连部和弹力部的连接处圆角过渡。
在该设计中,相连部与弹力部的连接处存在较大应力值和应力集中现象,通过令该连接处圆角过渡,随着圆角半径的增大而减小,应力分布更趋于均匀,从而提高了弹性导电件的疲劳安全系数。
在一种可能的设计中,进一步地,弹性导电件与导电轴承的轴承外圈接触。
在该设计中,弹性导电件与导电轴承的轴承外圈接触,轴承外圈不随转轴转动,则弹性导电件和轴承外圈之间不存在相对位移活动,从而可以降低弹性导电件、金属件的磨损率,延长使用寿命。
也就是说,弹性导电件与导电轴承的轴承内圈不接触,由于轴承内圈会与转轴同步转动,若弹性导电件同时与轴承内圈和轴承外圈接触,则会导致轴承内圈卡住而无法转动的问题。
在一种可能的设计中,进一步地,轴承外圈的一部分与弹性导电件接触。
在该设计中,轴承外圈的一部分与弹性导电件接触,也就是说,轴承外圈的一部分用于导电接触,与弹性导电件相互挤压接触,轴承外圈的另一部分外露,与弹性导电件不接触,从而能够减小轴承外圈的磨损。
需要说明的是,由于弹性导电件位于导电轴承背离转子铁芯的轴向一侧,则弹性导电件与轴承外圈的一侧轴向端面接触,弹性导电件与轴承外圈的周侧不接触。
在一种可能的设计中,进一步地,弹性导电件上设有避让口,转轴的一部分能够伸入避让口内。
在该设计中,弹性导电件还包括避让口,避让口设在弹性导电件上,避让口能够避开转轴、导电轴承的轴承内圈,轴承内圈与转轴过盈配合,轴承内圈会随同转轴同步转动。轴承外圈与弹性导电件接触导通,轴承外圈与弹性导电件位置静止,不会随同转轴运动而转动。具体地,避让口沿轴向贯穿设在弹性导电件上。比如,弹性导电件包括设置在相连部上至少两个弹力部,避让口设在相连部上,此时,相连部呈环形结构。弹性导电件包括至少两个连接曲部和至少两个弹力部,一个连接曲部连接在相邻两个弹力部之间,至少两个连接曲部和至少两个弹力部连接围合形成避让口。
也就是说,由于避让口的设置,弹性导电件呈中空结构,从而可以避免弹性导电件和转轴、导电轴承的内圈接触,若弹性导电件呈非中空结构,则导电轴承的内圈的轴向端部、转轴会与弹性导电件接触,产生摩擦转矩而干扰转轴的转动。
需要说明的是,避让口用于避让转轴和轴承内圈,转轴的转动过程包括正常转动情况和轴向窜动情况,在正常转动情况下,转轴和轴承内圈可以不位于避让口中,在轴向窜动情况下,转轴和轴承内圈可以伸入避让口内。
在一种可能的设计中,进一步地,避让口包括圆形开口。
在该设计中,避让口可以为圆形开口,圆形开口适应于导电轴承中轴承内圈、转轴的旋转趋势,当转轴在径向上发生些许偏移时,圆形开口能够对径向 上的偏移做出较好的避让。
在一种可能的设计中,进一步地,弹性导电件为钣金件。
在该设计中,当弹性导电件包括弹力部和相连部时,可以通过钣金冲压折弯工艺形成弹力部和相连部,与此同时,相连部和弹力部为一体式结构,相连部和弹力部具体为一体式结构,因为一体式结构的力学性能好,因而能够提高相连部和多个弹力部之间的连接强度,另外,可将相连部和弹力部一体制成,批量生产,以提高产品的加工效率,降低产品的加工成本。并且,通过将相连部和弹力部设计为一体成型的一体式结构,提高了弹性导电件的整体性,减少了零部件数量,减少了安装工序,提高了安装效率,使弹性导电件的安装更为方便可靠。
在一种可能的设计中,进一步地,电机还包括导电连接件,导电连接件与金属件相连,弹性导电件的至少部分位于导电连接件和导电轴承之间。
在该设计中,电机还包括导电连接件,导电连接件分别与金属件和弹性导电件连接,也就是说,为了实现轴电流的引流,弹性导电件处的轴电流未直接与金属件相连,而是通过导电连接件引导至金属件处,通过设置导电连接件,在确保导电连通的前提下,可以简化装配过程,降低制备难度。
具体地,导电连接件为铝合金铸造件,具体地,导电连接件呈板状结构,导电连接件安装在电机的端盖上,导电连接件与端盖充分接触导通。
在一种可能的设计中,进一步地,导电连接件包括板体和安装部,板体与金属件相连。安装部朝向转轴设在板体上,安装部包括安装位,弹性导电件和导电轴承的一部分分别设置在安装位处。
在该设计中,导电连接件包括板体和安装部,板体与金属件相连。安装部朝向转轴设在板体上,具体地,安装部可以沿轴向延伸设在板体上。安装部包括安装位,弹性导电件的至少一部分设置在安装位处,方便弹性导电件的安装定位。进一步地,板体和安装部为一体式结构,一体式结构的力学性能好,因而能够提高板体和安装部之间的连接强度,另外,可将板体和安装部一体制成,批量生产,以提高产品的加工效率,降低产品的加工成本。并且,通过将板体和安装部设计为一体成型的一体式结构,提高了导电连接件的整体性,减少了零部件数量,减少了安装工序,提高了安装效率,使导电连接件的安装更为方便可靠。
在一种可能的设计中,进一步地,安装部包括支撑部和抵接部,支撑部设于板体上。抵接部连接在支撑部的轴向端部,安装位设置在抵接部和支撑部之间;其中,导电轴承的轴承外圈与抵接部接触,弹性导电件设于抵接部、支撑部和导电轴承之间。
在该设计中,安装部包括支撑部和抵接部,支撑部沿轴向延伸设于板体上。抵接部连接在支撑部的轴向端部,安装位位于抵接部和支撑部之间,支撑部呈环形结构、抵接部也呈环形结构,支撑部的内径小于抵接部的内径,即安装位呈现为环形台阶位(环形沉孔)。在装配过程中,由于环形沉孔的直径大于导电轴承的外径(即轴承外圈的外径),轴承外圈设置在抵接部的一部分内壁上, 其中,沉孔与导电轴承为同心结构。在抵接部的另一部分内壁、支撑部和导电轴承之间会形成环形的安装间隙,该安装间隙用于容纳弹性导电件的至少一部分。弹性导电件通过弹性变形而与导电轴承、安装部充分接触,进而形成良好的导电通路。
需要说明的是,轴电流包括两个导电通路,其一为依次通过转轴、导电轴承、弹性导电件、导电连接件和金属件。其二为依次经过转轴、回转轴承和端盖。而由于导电通路一的电阻小于导电通路二,即轴电流会优先从导电通路一传递,防止轴电流对回转轴承的腐蚀,延长回转轴承的使用寿命。
进一步地,支撑部能够对导电轴承和弹性导电件构成轴向限位,抵接部能够为导电轴承和弹性导电件构成径向限位,在确保导电接触的前提下,也便于弹性导电件和导电轴承的定位安装。
在一种可能的设计中,进一步地,抵接部包括抵接壁、轴侧壁和导向部,抵接壁朝向导电轴承,轴侧壁背离支撑部,导向部设于抵接壁与轴侧壁的连接处。
在该设计中,抵接部包括抵接壁、轴侧壁和导向部,抵接壁朝向弹性导电件和导电轴承,导电轴承的轴承外圈与抵接壁的一部分抵接,弹性导电件能够与抵接壁的另一部分接触,从而可以增加弹性导电件和导电连接件的接触面积,提升导电通路的可靠性。轴侧壁背离支撑部设置,即轴侧壁为朝向转子铁芯的轴向端壁,导向部设于抵接壁与轴侧壁的连接处。当弹性导电件和导电轴承安装于支撑部和抵接壁所形成的安装位时,导向部能够方便弹性导电件和导电轴承的装配,降低装配难度。值得说明的是,导向部可以为导向弧面、导向斜面等。
在一种可能的设计中,进一步地,支撑部具有朝向转轴开口的中空腔。
在该设计中,支撑部具有朝向转轴开口的中空腔,中空腔能够避免导电连接件和导电轴承的内圈、转轴接触,若导电连接件呈非中空结构,则导电轴承的内圈的轴向端部/转轴可能会与导电连接件干涉,产生摩擦转矩而干扰导电轴承的转动。
在一种可能的设计中,进一步地,金属件包括端盖,端盖设在转子铁芯的轴向一侧,弹性导电件的至少一部分设在端盖与导电轴承之间。
在该设计中,金属件包括端盖,端盖设在转子铁芯的轴向一侧。具体地,端盖靠近转轴的第二外露端设置,即端盖为后端盖。弹性导电件的至少一部分设在端盖与导电轴承之间,端盖距离导电轴承的位置较近,能够快速将轴电流引导出,同时也能够节省弹性导电件、导电连接件的材料成本,令导电通路的布置更加合理化。
在一种可能的设计中,进一步地,导电轴承的内径为D1,导电轴承的内外圈电阻为R1。电机还包括回转轴承,回转轴承套设在转轴上,回转轴承位于导电轴承背离端盖的一侧,回转轴承的内径为D2,回转轴承的内外圈电阻为R2,其中,D1<D2,R1<R2。
在该设计中,金属件与回转轴承之间的电阻,大于金属件与导电轴承之间 的电阻,从而使得轴电流能够优先从导电轴承所在通路流出。需要说明的是,回转轴承起到回转支撑转轴的作用。回转轴承内外圈之间的电阻大于导电轴承的内外圈电阻,回转轴承的内径大于导电轴承的内径,进一步地利于轴电流通过导电轴承与金属件连接,防止轴电流对回转轴承的腐蚀,延长轴承的使用寿命。
根据本申请的第四个方面,提供了一种车辆,包括上述任一设计所提供的电机。
本申请提供的车辆,包括上述任一设计所提供的电机,因此具有该电机的全部有益效果,在此不再赘述。
值得说明的是,车辆可以为新能源汽车。其中,新能源汽车包括纯电动汽车、增程式电动汽车、混合动力汽车、燃料电池电动汽车、氢发动机汽车等。
本申请的附加方面和优点将在下面的描述部分中变得明显,或通过本申请的实践了解到。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解,其中:
图1示出了根据本申请的一个实施例中电机的结构示意图;
图2示出了图1所示的根据本申请的一个实施例中的电机在A处的局部放大图;
图3示出了根据本申请的实施例中电机的弹性导电件的结构示意图之一;
图4示出了根据本申请的实施例中电机的弹性导电件的结构示意图之二;
图5示出了根据本申请的实施例中电机的弹性导电件的结构示意图之三;
图6示出了根据本申请的实施例中电机的弹性导电件的结构示意图之四;
图7示出了根据本申请的实施例中电机的弹性导电件的结构示意图之五;
图8示出了根据本申请的实施例中电机的弹性导电件的结构示意图之六;
图9示出了根据本申请的实施例中电机的弹性导电件的结构示意图之七;
图10示出了根据本申请的实施例中电机的弹性导电件的结构示意图之八;
图11示出了根据本申请的实施例中电机的弹性导电件的结构示意图之九;
图12示出了根据本申请的一个实施例中电机的结构示意图;
图13示出了图12所示的根据本申请的一个实施例中的电机在B处的局部放大图;
图14示出了根据本申请的一个实施例中电机的弹性导电件的结构示意图之一;
图15示出了根据本申请的一个实施例中电机的弹性导电件的结构示意图之二;
图16示出了根据本申请的另一个实施例中电机的结构示意图;
图17示出了图16所示的根据本申请的一个实施例中的电机在C处的局部放大图;
图18示出了根据本申请的另一个实施例中电机的弹性导电件的结构示意图;
图19示出了根据本申请的又一个实施例中的电机的部分结构放大图;
图20示出了根据本申请的又一个实施例中电机的弹性导电件的结构示意图之一;
图21示出了根据本申请的又一个实施例中电机的弹性导电件的结构示意图之二;
图22示出了根据本申请的又一个实施例中电机的弹性导电件的结构示意图之三;
图23示出了根据本申请的再一个实施例中电机的弹性导电件的结构示意图;
图24示出了根据本申请的其他一个实施例中电机的结构示意图;
图25示出了图24所示的根据本申请的其他一个实施例中的电机在D处的局部放大图;
图26示出了根据本申请的其他一个实施例中电机的弹性导电件的结构示意图之一;
图27示出了根据本申请的其他一个实施例中电机的弹性导电件的结构剖视图。
其中,图1至图27中附图标记与部件名称之间的对应关系为:
100电机,
111端盖,112机壳,
120转子铁芯,
130转轴,
140导电轴承,141轴承内圈,142轴承外圈,
150弹性导电件,150a缓冲空间,150b缓冲腔,
151连接部,151a第一连接部,151b第二连接部,
152弹性部,152a第一接触部,152b第二接触部,152c第一弹性部,152d第二弹性部,
153释放口,
1510相连部,1511连接曲部,1512连接环,
1520弹力部,1521第一弹性凸部,1522第一弹性凹部,1523第二弹性凸部,
1530弹片,1531第三弹性凸部,1532第三弹性凹部,
160避让口,
170导电连接件,
171板体,
172安装部,172a支撑部,172b抵接部,1721抵接壁,1722轴侧壁,1723导向斜面,
180回转轴承,
190定子,191定子铁芯,192定子绕组。
具体实施方式
为了能够更清楚地理解本申请的上述目的、特征和优点,下面结合附图和具体实施方式对本申请进行进一步的详细描述。需要说明的是,在不冲突的情况下,本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本申请,但是,本申请还可以采用其他不同于在此描述的其他方式来实施,因此,本申请的保护范围并不受下面公开的具体实施例的限制。
下面参照图1至图27描述根据本申请一些实施例所提供的电机100和车辆。
实施例一
根据本申请的第一个方面,提供了一种电机100,如图1和图2所示,电机100包括金属件、转子铁芯120、转轴130、导电轴承140和弹性导电件150,转子铁芯120设于金属件的一侧,转子铁芯120包括轴孔。转轴130与转子铁芯120相连,转轴130穿设于轴孔内。导电轴承140套设于转轴130。弹性导电件150的至少部分设在导电轴承140和金属件之间。
本申请提供的电机100包括金属件、转子铁芯120、转轴130、导电轴承140和弹性导电件150,其中,转子铁芯120设在金属件的一侧。具体地,金属件可以为电机100的端盖111,或者是电机100的机壳112等。当金属件为端盖111时,端盖111位于转子铁芯120的轴向一侧。当金属件为机壳112时,机壳112围设在转子铁芯120的周向外侧。转子铁芯120具有轴孔,轴孔沿轴向贯穿设在转子铁芯120上,转轴130穿设于轴孔内,转轴130与转子铁芯120相连。具体地,转轴130包括相背的两个外露端,分别为第一外露端和第二外露端,具体地,当电机100应用于车辆时,电机100可以作为驱动电机,第一外露端用于与车辆的车轮等负载连接,以在转轴130转动时驱动车轮转动,实现动力输出。导电轴承140套设在转轴130上,导电轴承140是独立于电机100的回转轴承180以外的附加轴承,起到连接转轴130和弹性导电件150的作用。进一步地,导电轴承140 套设在第二外露端上。弹性导电件150的至少部分设在导电轴承140和金属件之间,弹性导电件150通过自身弹性变形产生压紧力,从而与导电轴承140紧密接触,进而可以减小弹性导电件150与导电轴承140之间的接触电阻,起到对轴电流的引导作用,防止轴电流对电机100的回转轴承180的腐蚀,延长导电轴承140、回转轴承180的使用寿命,同时,通过弹性导电件150的自身形变产生的压紧力来实现与导电轴承140达到受力平衡,确保导电轴承140受力均匀,也就是说,尽管导电轴承140会随着转轴130发生轴向以及径向的窜动,而由于弹性导电件150的自适应能力,可以令弹性导电件150一直稳定地与导电轴承140接触,不会由于导电轴承140窜动而无法有效接触,确保导电连通。同时,也能够防止导电轴承140因应力集中损坏,避免导电轴承140因为偏载力而出现异常磨损的情况。此外,本申请仅通过在转轴130上套设导电轴承140和弹性导电件150,即可实现防腐蚀的作用,具有结构简单,布置合理、成本低廉、装配简单等优点。
具体地,电机100还包括定子190,定子190围设在转子铁芯120的外周,定子190包括定子铁芯191和定子绕组192,定子绕组192绕设在定子铁芯191上。关于电机100的工作原理对于本领域普通技术人员而言都是已知的,这里不再详细描述。
需要说明的是,导电轴承140包括内圈和套设在内圈外的外圈,内圈和外圈之间具有间隙。导电轴承140还包括两个密封圈,两个密封圈分别密封在外圈与内圈沿轴线方向(即厚度方向)的两端之间,即两个密封圈分别密封在导电轴承140沿轴线方向(即厚度方向)的两侧间隙,导电轴承140的钢球密封在两个密封圈、内圈和外圈之间,内圈和外圈之间的空隙中填充有导电润滑脂,轴电流可以经过转轴130泄漏至导电轴承140的内圈,然后再通过导电润滑脂快速传导至外圈,从而确保导电轴承140具有优良的导电性能。由于导电润滑脂的存在,导电轴承140内圈和外圈之间的电阻减小,具有良好的导电性能,与回转轴承180相比较,导电轴承140的电阻更小。
进一步地,导电轴承140几乎不会受到轴向以及径向的负载。具体地,导电轴承140为深沟球轴承。
进一步地,导电轴承140起到导通轴电流的作用,选用尺寸系列更小的导电轴承140可以获得更好的高速性能和导电性能。因此,导电轴承140的尺寸远小于回转轴承180的尺寸。进一步地,导电轴承140安装在转轴130的尾端(第二外露端),导电轴承140与弹性导电件150紧密接触并导通。
进一步地,轴电流通过导电轴承140的外圈后,再通过弹性导电件150被引导至金属件处。
需要说明的是,弹性导电件150在压缩状态下设于金属件和导电轴承140之间,弹性导电件150为了恢复原状而产生的反向力会压紧在导电轴 承140上。进一步地,关于弹性导电件150与金属件的连接方式可以为二者直接连接,也可以为弹性导电件150通过其他导电部件与金属件间接相连,也就是说,轴电流能够通过弹性导电件150直接被引导至金属件处,也可以通过其他导电部件间接传递。
其中,金属件接地设置,可以实现轴电流经过金属件泄放至大地。
能够想到的是,本申请提供的电机100,不仅可以应用于车辆领域,作为车辆的驱动电机,当然,也能够应用于家电设备领域,比如,空调设备、衣物处理设备、烹饪器具等。
换而言之,本申请的一个实施例公开了一种电机100,其包括接地设置的金属件,套设在转轴130上的导电轴承140,导电轴承140用于引导电机100工作过程中的轴电流,防止轴电流流向电机100的回转轴承180处。同时,为了实现导电轴承140与金属件之间的导通连接,设置了弹性导电件150,弹性导电件150依据自身能够产生的弹力,进而实现与导电轴承140的夹紧配合,从而令减小弹性导电件150与导电轴承140之间的接触电阻,起到对轴电流的引导作用,防止轴电流对电机100的回转轴承180的腐蚀,延长导电轴承140、回转轴承180的使用寿命。
关于弹性导电件150的具体结构,可以包括两种,一种是部分形变产生弹力,另一种是整体形变产生弹力。
具体地,当弹性导电件150的部分形变产生弹力,弹性导电件150包括起到支撑作用的连接部151和设置在连接部151上的多个弹性部152,连接部151可以用于支撑弹性部152,也能够便于与其他部件之间的配合安装,多个弹性部152能够发生形变以夹紧导电轴承152。
具体地,当弹性导电件整体形变产生弹力,弹性导电件150包括多个连接部151和多个弹性部152,连接部151和弹性部152首尾相连,连接部151和弹性部152均为可形变部件,从而能够提供弹力。在连接部151和弹性部152的整体作用下,弹性导电件能够实现最大夹紧力,其与导电轴承140之间的加紧效果更加。具体地,连接部151和弹性部152均为曲折结构,二者可以同时背离中心轴线方向凸出,二者的弯曲程度不同。或者,连接部151朝向中心轴线凸出,弹性部152背离中心轴线凸出,此时,连接部151能够与导电轴承140的外周壁接触,弹性部152能够与金属件直接连接,或者通过其他部件间接连接。
实施例二
进一步地,如图3、图4、图5和图6所示,弹性导电件150包括连接部151和多个弹性部152,多个弹性部152分别与连接部151相连,每个弹性部152曲折延伸,弹性部152设在导电轴承140和金属件之间。
在该实施例中,弹性导电件150包括连接部151和多个弹性部152,连接部151作为支撑结构,多个弹性部152分别设置在连接部151上,每个弹性部152曲折延伸,从而令自身具有较大的弹性形变量。具体地,弹性部152至少可以朝背离中心轴线的方向凸出,即每个弹性部152至少朝外 凸出,弹性部152夹设在导电轴承140和金属件之间,弹性部152能够相对于连接部151发生形变。朝外凸出设置的弹性部152能够方便与金属件、导电轴承140接触,同时也能够为自身形变提供一定的形变空间。
进一步地,弹性导电件150为钣金冲压折弯件。连接部151和多个弹性部152为一体式结构,连接部151和多个弹性部152具体为一体式结构,因为一体式结构的力学性能好,因而能够提高连接部151和多个弹性部152之间的连接强度,另外,可将连接部151和多个弹性部152一体制成,批量生产,以提高产品的加工效率,降低产品的加工成本。并且,通过将连接部151和多个弹性部152设计为一体成型的一体式结构,提高了弹性导电件150的整体性,减少了零部件数量,减少了安装工序,提高了安装效率,使弹性导电件150的安装更为方便可靠。
进一步地,如图3和图4所示,弹性部152包括第一接触部152a和第二接触部152b,第一接触部152a与连接部151相连,第一接触部152a朝背离中心轴线的方向凸出。第二接触部152b与第一接触部152a相连,第二接触部152b朝靠近中心轴线的方向凸出,第二接触部152b的至少一部分与导电轴承140相接触。
在该实施例中,弹性部152包括第一接触部152a和第二接触部152b,其中,第一接触部152a与连接部151相连,第一接触部152a朝背离中心轴线的方向凸出,即第一接触部152a朝外凸出,第一接触部152a的外表面能够与金属件相连,或者,第一接触部152a的外表面能够与其他导电部件相连。具体地,第一接触部152a具有相背离的第一端和第二端,第一接触部152a的第一端与连接部151相连,第一接触部152a的第二端与第二接触部152b相连,第二接触部152b朝靠近中心轴线的方向凸出,即第二接触部152b朝内凸出,从而以便于第二接触部152b的至少一部分与导电轴承140的外圈相接触。第一接触部152a和第二接触部152b整体呈S状,朝外凸出的第一接触部152a与金属件或其他导电部件连接,朝内凸出的第二接触部152b与导电轴承140的外圈接触,凸出方向相反的第一接触部152a和第二接触部152b能够便于弹性导电件150压紧设在导电轴承140上,且为导电轴承140在使用过程中的偏载力提供更好的缓冲,以使导电轴承140受力平衡而达到良好的导通状态。
实施例三
进一步地,弹性导电件150包括连接部151和多个弹性部152,多个弹性部152分别与连接部151相连,每个弹性部152至少朝背离中心轴线的方向凸出,弹性部152设在导电轴承140和金属件之间。
在该实施例中,弹性导电件150包括连接部151和多个弹性部152,弹性部152作为支撑结构,多个弹性部152分别设置在连接部151上,每个弹性部152至少朝背离中心轴线的方向凸出,即每个弹性部152至少朝外凸出,弹性部152夹设在导电轴承140和金属件之间,弹性部152能够相对于连接部151发生形变。朝外凸出设置的弹性部152能够方便与金属 件、导电轴承140接触,同时也能够为自身形变提供一定的形变空间。
进一步地,弹性导电件150为钣金冲压折弯件。连接部151和多个弹性部152为一体式结构,连接部151和多个弹性部152具体为一体式结构,因为一体式结构的力学性能好,因而能够提高连接部151和多个弹性部152之间的连接强度,另外,可将连接部151和多个弹性部152一体制成,批量生产,以提高产品的加工效率,降低产品的加工成本。并且,通过将连接部151和多个弹性部152设计为一体成型的一体式结构,提高了弹性导电件150的整体性,减少了零部件数量,减少了安装工序,提高了安装效率,使弹性导电件150的安装更为方便可靠。
进一步地,如图5和图6所示,弹性部152包括第一接触部152a和第二接触部152b,第一接触部152a的第一端弯曲后连接在连接部151上,第一接触部152a的第二端沿轴向延伸。第二接触部152b与第一接触部152a的第二端相连,第二接触部152b朝背离或凸出中心轴线的方向卷曲。
在该实施例中,弹性部152包括第一接触部152a和第二接触部152b,第一接触部152a的第一端弯曲后连接在连接部151上,第一接触部152a与连接部151的连接处呈柔和过渡状,从而避免二者的连接处应力集中,一方面防止钣金加工过程中断裂,另一方面也为弹性部152相对于连接部151形变过程中提供更大的自由度。进一步地,第一接触部152a的第二端沿轴向延伸以形成朝向中心轴线的轴向内表面,轴向内表面与导电轴承140的外圈接触,从而以与导电轴承140紧密接触。第二接触部152b与第一接触部152a的第二端相连,第二接触部152b朝背离或凸出中心轴线的方向卷曲,呈卷曲状的第二接触部152b能够增强弹性部152的整体结构强度,提升弹性导电件150的使用寿命。具体地,当第二接触部152b朝背离中心轴线的方向卷曲时,第二接触部152b与导电连接件170/金属件接触导通。
在实施例二和实施例三的基础上,进一步地,如图3、图4、图5和图6所示,弹性部152设置在连接部151的外周壁上。
在该实施例中,连接部151的外轮廓呈圆形,则连接部151包括外周壁。每个弹性部152的第一接触部152a均以连接部151的外周壁为起始点,由于弹性导电件150为钣金折弯件,受限于加工方式,第一接触部152a必然会在径向方向有一定的延伸。在转轴130转动过程中,不可避免地,导电轴承140会受到些许径向的偏载力,相较于其他端面而言,在径向上延伸的第一接触部152a能够起到很好的缓冲作用,防止弹性部152受到径向力冲击而断裂。
进一步地,每个弹性部152的至少一部分位于连接部151的轴向一侧。
在该设计中,每个弹性部152的至少一部分位于连接部151的轴向一侧,即至少一部分弹性部152在轴向上凸出于连接部151设置,也就是说,连接部151和弹性部152能够形成安装导电轴承140的安装位置,连接部151不仅起到设置弹性部152的作用,还能够为导电轴承140提供支撑作用。具体来说,转轴130上设有限位台阶,导电轴承140套设在转轴130 上,导电轴承140的轴向第一端抵接在限位台阶上,导电轴承140的轴向第二端抵接在弹性部152和连接部151构成的安装位置内。
此外,位于连接部151轴向一侧的弹性部152,在发生形变时不会受到连接部151的干扰,而能够直接将弹力传递至导电轴承140,从而确保弹性部152与导电轴承140之间夹紧配合。
实施例四
进一步地,如图7、图8、图9、图10和图11所示,弹性导电件150包括多个连接部151和多个弹性部152,多个弹性部152中任一个弹性部152连接在两个连接部151之间,每个弹性部152朝背离或凸出中心轴线的方向凸出。
在该实施例中,弹性导电件150包括多个连接部151和多个弹性部152,多个弹性部152中任一个弹性部152连接在两个连接部151之间,即多个弹性部152和多个连接部151首尾相连构成弹性导电件150,每个弹性部152朝背离或凸出中心轴线的方向凸出,即弹性部152呈波形弯曲结构,呈弯曲结构的弹性部152能够发生形变,从而夹紧设在导电轴承140上。需要说明的是,位于两个弹性部152之间的连接部151可以呈平直状,折弯状,连接部151不仅能够起到连接功能,还能够与导电轴承140接触,将弹性部152产生的弹力传递至导电轴承140的外周壁上,从而实现弹性导电件夹紧设置在导电轴承140上,令二者之间的接触电阻较小,从而使得轴电流更容易经由导电轴承140、弹性导电件传递至金属件处,进而以实现接地,明显降低对于回转轴承的腐蚀。
具体地,当连接部151呈平直状时,则连接部151能实现支撑作用,且还能够传递弹性部152所产生的作用力。
在一种可能的设计中,进一步地,多个连接部151中至少一个连接部151呈弯曲状。
在该设计中,一个连接部151呈弯曲状,则该连接部151自身也能够发生形变以产生弹力,那么,对于导电轴承140而言,其所承受的夹紧力,不仅来自于弹性部152,还能够来自于弯曲状的连接部151,在有限的空间内,实现夹紧力最大化,确保弹性导电件和导电轴承140之间的夹紧效果。
实施例五
在前述实施例的基础上,如图7和图8所示,本实施例对于弹性部152和连接部151的具体结构进一步说明,多个弹性部152中每个弹性部152朝背离中心轴线的方向凸出形成第一弹性部152c,多个连接部151中每个连接部151朝背离中心轴线的方向弯曲形成第一连接部151a。每个第一连接部151a包括朝向中心轴线的壁面为圆弧面,圆弧面与导电轴承140相接触。
在该设计中,每个弹性部152朝背离中心轴线的方向凸出,形成朝外凸出第一弹性部152c,每个连接部151朝背离中心轴线的方向弯曲,即每个连接部151朝外弯曲形成第一连接部151a,第一连接部151a包括靠内的圆弧面,当弹性导电件150设置在导电轴承140上时,圆弧面能够与导电轴承140的外 周壁接触,从而增加二者的接触面积,弹性部152和第一连接部151a形变所产生的弹力都能够通过圆弧面施加于导电轴承140上。
实施例六
在前述实施例的基础上,如图9和图10所示,本实施例对于弹性部152和连接部151的具体结构进一步说明,多个弹性部152中每个弹性部152朝向中心轴线的方向凸出形成第二弹性部152d,第二弹性部152d包括朝向中心轴线的接触部,接触部与导电轴承140相接触。多个连接部151中每个连接部151朝背离中心轴线的方向弯曲形成第一连接部151a。
在该设计中,多个弹性部152中每个弹性部152朝向中心轴线的方向凸出形成第二弹性部152d,即第二弹性部152d朝内凸出设置,第二弹性部152d包括朝向中心轴线的接触部,接触部与导电轴承140相接触,多个连接部151中每个连接部151朝背离中心轴线的方向弯曲形成第一连接部151a,即第一连接部151a朝外凸出,第一连接部151a包括背离中心轴线的圆弧面,圆弧面能够与金属件或导电连接件170接触。
实施例七
在前述实施例的基础上,如图11所示,本实施例对于弹性部152和连接部151的具体结构进一步说明,多个弹性部152中每个弹性部152朝背离中心轴线的方向凸出形成第一弹性部152c,多个连接部151中每个连接部151朝靠近中心轴线的方向凸出形成第二连接部151b。每个第二连接部151b包括朝向中心轴线接触端,接触端抵接在导电轴承140的外周。
在该实施例中,多个连接部151中每个连接部151朝靠近中心轴线的方向凸出,即每个连接部151朝内弯曲凸出以形成第二连接部151b。每个第二连接部151b包括朝向中心轴线接触端,即每个第二连接部151b包括朝内凸出的接触端,接触端抵接在导电轴承140的外周。弹性部152、第二连接部151b产生的弹力会通过接触端传递至导电轴承140的外壁。
需要说明的是,多个连接部151、多个弹性部152分别均匀间隔设置,从而能够确保导电轴承140受力平衡,不会受到偏载力而发生倾斜。
具体地,连接部151呈弧形段,多个弧形段和朝外凸出的弹性部152间隔相连,弧形段和弹性部152均可提供形变量。弧形段能够与导电轴承140的外圈接触,弹性部152能够与导电连接件170接触连通,连接部151和弹性部152整体发生弹性形变,从而使得弹性导电件150处于压缩状态下夹设在导电轴承140和导电连接件170之间。
可以想到的,每个弹性部152朝背离中心轴线的方向凸出,弧形段可以朝背离中心轴线的方向弯曲,也可以朝靠近中心轴线的方向弯曲。即弹性部152和弧形段整体呈波浪状结构。
进一步地,如图7、图8、图9、图10和图11所示,弹性导电件150还包括释放口153,释放口153设于多个连接部151中的任一个上。
在该实施例中,弹性导电件150还包括释放口153,释放口153设于多个连接部151中的任一个上,释放口153能够为弹性导电件150整体提 供圆周方向上的自由度,可以避免由于弹性部152和连接部151形变而产生的过大的变形和应力,释放口153能够提供较大的形变范围,对弹性部152和连接部151形变过程中的应力进行释放。
进一步地,释放口153沿弹性导电件的轴向贯穿设置。
在该设计中,释放口153沿弹性导电件150的轴向贯穿设置,从而能够令弹性导电件150各处所受到的过大应力、过大形变量都可以通过对应位置处的部分释放口153进行释放,从而提高弹性导电件150的疲劳安全系数。
进一步地,如图7至图11所示,释放口153位于连接部151的中心。
在该实施例中,释放口153沿轴向贯穿设在连接部151上,令具有释放口153的连接部151为目标连接部,而与目标连接部相连的两个弹性部为第一侧弹性部和第二侧弹性部。当释放口153位于目标连接部的中心时,则释放口153距离第一侧弹性部的距离、释放口153距离第二侧弹性部的距离相等,即第一侧弹性部和第二侧弹性部彼此靠近的端部均留有等长度的连接结构,从而确保第一侧弹性部和第二侧连接部的可靠支撑性能。比如,当释放口153靠近一个弹性部152设置时,则对于该弹性部152而言,由于一侧连接部151缺失,则弹性导电件150的结构不对称,此时,多个弹性部152作用于导电轴承140的夹紧力的合力则不为零,容易令导电轴承140受力不平衡而受到磨损。
实施例八
在前述实施例的基础上,本实施例对于多个弹性部152的排布方式做出说明,弹性导电件150包括连接部151和多个弹性部152,多个弹性部152分别与连接部151相连,每个弹性部152至少朝背离中心轴线的方向凸出,弹性部152设在导电轴承140和金属件之间。多个弹性部152均匀间隔分布。
在该实施例中,均匀间隔分布的弹性部152可以令导电轴承140受到合力为零的夹紧力,防止导电轴承140由于弹性导电件150的设置而受力不均衡发生偏移而磨损加剧。
具体地,如图3和图5所示,当弹性导电件150包括多个弹性部152和一个连接部151,比如,当弹性部152的数量为3个时,三个弹性部152的结构大小均相同,三个弹性部152均匀分布在连接部151上,即三个弹性部152中相邻两个弹性部152之间的间隔为120°。三个弹性部152通过弹性变形,夹紧在导电轴承140的外圈上。可以理解的是,由于三个弹性部152均匀分布在连接部151上,并且由于结构大小均相同,即三个弹性部152所产生的夹紧力相同,从而令三个弹性部152对导电轴承140的合力为零,可以避免由于结构不对称使得三个弹性部152产生一个沿导电轴承140径向的合力,进而对导电轴承140的寿命产生不良影响,通过弹性部152产生的弹力以令弹性部152与导电轴承140之间充分接触,进而减小接触电阻,形成良好的导通通路。或者,如图4和图6所示,当弹性 部152的数量为4个时,4个弹性部152分为两组,即每组包含两个弹性部152,每组弹性部152在呈环形结构的连接部151上沿直径方向对称分布,两组弹性部152均匀分布,即相邻两个弹性部152之间的夹角为90°,即两组弹性部152的连线互相垂直。进一步的,由于两组弹性部152均匀对称的分布在连接部151上,并且产生的夹紧力相同,进而两组弹性部152对导电轴承140的合力为零,避免由于结构不对称对使两组弹性部152产生一个沿导电轴承140径向的合力,进而对导电轴承140寿命产生不良影响。通过弹片部产生的弹力的目的仅是为了同导电轴承140充分接触,进而减小接触电阻,形成良好的导通通路。
实施例九
如图7、图8和图9所示,弹性导电件150包括多个连接部151和多个弹性部152,多个弹性部152中任一个弹性部152连接在两个连接部151之间,每个弹性部152朝背离或朝向中心轴线的方向凸出。多个弹性部152均匀间隔分布。
在该实施例中,均匀间隔分布的弹性部152可以令导电轴承140受到合力为零的夹紧力,防止导电轴承140由于弹性导电件150的设置而受力不均衡发生偏移而磨损加剧。
具体地,当弹性导电件150包括多个弹性部152和多个连接部151,比如,弹性部152的数量为3个,连接部151的数量为3个,释放口153的数量为1个,3个弹性部152和3个连接部151交替连接,释放口153设在一个连接部151的中心。3个弹性部152均匀分布在3个连接部151之间,即3个弹性部152中相邻两个弹性部152之间的间隔角度为120°。或者,弹性部152的数量为4个,连接部151的数量为4个,相邻两个弹性部152之间的夹角为90°。
在前述实施例的基础上,电机100还包括避让口160,避让口160设于弹性导电件150上,导电轴承140的至少一部分位于避让开口中。
在该实施例中,弹性导电件150还包括避让口160,避让口160设在弹性导电件150上,避让口160能够避开导电轴承140的内圈,内圈与转轴130过盈配合,内圈会随同转轴130同步转动。导电轴承140的外圈与弹性导电件150接触导通,外圈与弹性导电件150位置静止,不会随同转轴130运动而转动。具体地,避让口160沿轴向贯穿设在弹性导电件150上。比如,弹性导电件150包括设置在连接部151上多个弹性部152,避让口160设在连接部151上,此时,连接部151呈环形结构。弹性导电件150包括多个连接部151和多个弹性部152,一个连接部151连接在相邻两个弹性部152之间,多个连接部151和多个弹性部152连接围合形成避让口160。
也就是说,由于避让口160的设置,弹性导电件150呈中空结构,从而可以避免弹性导电件150和导电轴承140的内圈接触,若弹性导电件150呈非中空结构,则导电轴承140的内圈的轴向端部会与弹性导电件150接 触,产生摩擦转矩而干扰导电轴承140的转动。
进一步地,连接部151和弹性部152的连接处圆角过渡。
在该设计中,连接部151与弹性部152的连接处存在较大应力值和应力集中现象,通过令该连接处圆角过渡,随着圆角半径的增大而减小,应力分布更趋于均匀,从而提高了弹性导电件150的疲劳安全系数。
进一步地,如图1和图2所示,电机100还包括导电连接件170,导电连接件170能够与金属件相连,弹性导电件150的至少部分压缩位于导电连接件170和导电轴承140之间。
在该实施例中,电机100还包括导电连接件170,导电连接件170分别与金属件和弹性导电件150连接,也就是说,为了实现轴电流的引流,弹性导电件150处的轴电流未直接与金属件相连,而是通过导电连接件170引导至金属件处,通过设置导电连接件170,在确保导电连通的前提下,可以简化装配过程,降低制备难度。
具体地,导电连接件170为铝合金铸造件,具体地,导电连接件170呈板状结构,导电连接件170安装在电机100的端盖111上,导电连接件170与端盖111充分接触导通。
进一步地,如图2所示,导电连接件170包括板体171和安装部172,板体171能够与金属件相连。安装部172朝向转轴130设在板体171上,安装部172包括安装位,弹性导电件150的至少一部分设置在安装位处。
在该实施例中,导电连接件170包括板体171和安装部172,板体171能够与金属件相连。安装部172朝向转轴130设在板体171上,即安装部172轴向延伸设在板体171上。安装部172包括安装位,弹性导电件150的至少一部分设置在安装位处,方便弹性导电件150的安装定位。
进一步地,板体171和安装部172为一体式结构。
进一步地,如图2所示,安装部172包括支撑部172a和抵接部172b,支撑部172a设于板体171上。抵接部172b连接在支撑部172a的轴向端部,安装位设置在抵接部172b和支撑部172a之间,弹性导电件150分别与抵接部172b和支撑部172a接触。
在该实施例中,安装部172包括支撑部172a和抵接部172b,支撑部172a沿轴向延伸设于板体171上。抵接部172b连接在支撑部172a的轴向端部,安装位设置在抵接部172b和支撑部172a之间,支撑部172a呈环形结构、抵接部172b也呈环形结构,支撑部172a的内径大于抵接部172b的内径,即安装位呈现为环形台阶位(环形沉孔)。在装配过程中,由于环形沉孔的直径大于导电轴承140的外径(即导电轴承140外圈的外径),沉孔与导电轴承140为同心结构,在抵接部172b和导电轴承140之间会形成环形的安装空间,该安装空间用于容纳弹性导电件150的至少一部分。弹性导电件150通过弹性变形而与导电轴承140、安装部172充分接触,进而形成良好的导电通路。
需要说明的是,轴电流包括两个导电通路,其一为依次通过转轴130、 导电轴承140、弹性导电件150、导电连接件170和金属件。其二为依次经过转轴130、回转轴承180和端盖111。而由于导电通路一的电阻小于导电通路二,即轴电流会优先从导电通路一传递,防止轴电流对回转轴承180的腐蚀,延长回转轴承180的使用寿命。
进一步地,支撑部172a能够对导电轴承140和弹性导电件150构成轴向限位,抵接部172b能够为导电轴承140和弹性导电件150构成径向限位,在确保导电接触的前提下,也便于弹性导电件150和导电轴承140的定位安装。
进一步地,如图2所示,抵接部172b包括抵接壁1721、轴侧壁1722和导向部,抵接壁1721朝向弹性导电件。轴侧壁1722背离支撑部。导向部设于抵接壁1721与轴侧壁1722的连接处。
在该设计中,抵接部172b包括抵接壁1721、轴侧壁1722和导向部,抵接壁1721朝向弹性导电件,弹性导电件能够与抵接壁1721接触。轴侧壁1722背离支撑部设置。导向部设于抵接壁1721与轴侧壁1722的连接处。当弹性导电件安装于支撑部和抵接壁1721所形成的安装位时,导向部能够方便弹性导电件安装,降低装配难度。
值得说明的是,导向部可以为导向弧面、导向斜面1723等。
具体地,当导向部包括导向斜面1723时,导向斜面1723的轴向深度h大于0mm,小于等于5mm,导向斜面1723与抵接壁1721所在切面之间的夹角大于0°,小于等于30°,在实现导向作用的基础上,也不会削弱抵接部172b对于弹性导电件的限位作用。
进一步地,支撑部172a具有朝向转轴130开口的中空腔。
在该实施例中,支撑部172a具有朝向转轴130开口的中空腔,中空腔能够避免导电连接件170和导电轴承140的内圈接触,若导电连接件170呈非中空结构,则导电轴承140的内圈的轴向端部会与导电连接件170接触,产生摩擦转矩而干扰导电轴承140的转动。
进一步地,如图1所示,金属件包括端盖111,端盖111设在转子铁芯120的轴向一侧,弹性导电件150的至少一部分设在端盖111与导电轴承140之间。
在该实施例中,金属件包括端盖111,端盖111设在转子铁芯120的轴向一侧。具体地,端盖111靠近转轴130的第二外露端设置,即端盖111为后端盖111。弹性导电件150的至少一部分设在端盖111与导电轴承140之间,端盖111距离导电轴承140的位置较近,能够快速将轴电流引导出,同时也能够节省弹性导电件150、导电连接件170的材料成本,令导电通路的布置更加合理化。
进一步地,导电轴承140的内径为D1,导电轴承140的内外圈电阻为R1。电机100还包括回转轴承180,回转轴承180套设在转轴130上,回转轴承180位于导电轴承140背离端盖111的一侧,回转轴承180的内径为D2,回转轴承180的内外圈电阻为R2,其中,D1<D2,R1<R2。
在该实施例中,金属件与回转轴承180之间的电阻,大于金属件与导电轴承140之间的电阻,从而使得轴电流能够优先从导电轴承140所在通路流出。需要说明的是,回转轴承180起到回转支撑转轴130的作用。回转轴承180内外圈之间的电阻大于导电轴承140的内外圈电阻,回转轴承180的内径大于导电轴承140的内径,进一步地利于轴电流通过导电轴承140与金属件连接,防止轴电流对回转轴承180的腐蚀,延长轴承的使用寿命。
在一个具体的实施例中,电机100包括金属件、转子铁芯120、转轴130、导电轴承140和弹性导电件150,转子铁芯120设于金属件的一侧,转子铁芯120包括轴孔。转轴130与转子铁芯120相连,转轴130穿设于轴孔内。导电轴承140套设于转轴130的端部。弹性导电件150的至少部分设在导电轴承140和金属件之间。
其中,关于弹性导电件150的具体结构具有多种实施方式,至少包括以下方式。
弹性导电件150的第一种结构为,弹性导电件150包括连接部151和多个弹性部152,多个弹性部152分别与连接部151相连,每个弹性部152至少朝背离中心轴线的方向凸出,弹性部152设在导电轴承140和金属件之间。
其中,弹性部152的实施方式可以为:弹性部152包括第一接触部152a和第二接触部152b,第一接触部152a与连接部151相连,第一接触部152a朝背离中心轴线的方向凸出。第二接触部152b与第一接触部152a相连,第二接触部152b朝靠近中心轴线的方向凸出,第二接触部152b的至少一部分与导电轴承140相接触。或者,弹性部152包括第一接触部152a和第二接触部152b,第一接触部152a的第一端弯曲后连接在连接部151上,第一接触部152a的第二端沿轴向延伸。第二接触部152b与第一接触部152a的第二端相连,第二接触部152b朝背离中心轴线的方向卷曲。
其中,弹性部152设置在连接部151的外周壁上,径向上延伸的第一接触部152a能够起到很好的缓冲作用,防止弹性部152受到径向力冲击而断裂。
弹性导电件150的第二种结构为,弹性导电件150包括多个连接部151和多个弹性部152,多个弹性部152中任一个弹性部152连接在两个连接部151之间,每个弹性部152朝背离或朝向中心轴线的方向凸出。
其中,多个连接部151中至少一个连接部151呈弯曲状,具体地,连接部151可以朝背离中心轴线的方向弯曲形成第一连接部151a,或者,连接部151可以朝向中心轴线弯曲形成第一连接部151b。
也就是说,如图7、图8、图9、图10和图11所示,对于弹性部152而言,弹性部152的凸出方向至少包括背离中心轴线、朝向中心轴线。对于连接部151而言,其弯曲方向至少包括背离中心轴线、朝向中心轴线。对于弹性部152和连接部151组合而言,其至少具有4种组合方式,比如, 背离中心轴线凸出的第一弹性部152c,朝向中心轴线凸出的第二弹性部152d,背离中心轴线弯曲的第一连接部151a,朝向中心轴线弯曲的第二连接部151b四者之间的组合。
进一步地,弹性导电件150还包括释放口153,释放口153设于多个连接部151中的任一个上。释放口153能够为弹性导电件150整体提供圆周方向上的自由度,可以避免由于弹性部152和连接部151形变而产生的过大的变形和应力。具体地,释放口153位于连接部151的中心。
基于弹性导电件150的上述两种具体结构,弹性导电件150均具有多个弹性部152,即多个弹性部152均匀间隔分布。均匀间隔分布的弹性部152可以令导电轴承140受到合力为零的夹紧力,防止导电轴承140由于弹性导电件150的设置而受力不均衡发生偏移而磨损加剧。
进一步地,电机100还包括导电连接件170,导电连接件170能够与金属件相连,弹性导电件150的至少部分压缩位于导电连接件170和导电轴承140之间。通过设置导电连接件170,在确保导电连通的前提下,可以简化装配过程,降低制备难度。
实施例十
根据本申请的第二个方面,提供了一种车辆,包括上述任一设计所提供的电机100。本申请提供的车辆,包括上述任一设计所提供的电机100,因此具有该电机100的全部有益效果,在此不再赘述。值得说明的是,车辆可以为新能源汽车。其中,新能源汽车包括纯电动汽车、增程式电动汽车、混合动力汽车、燃料电池电动汽车、氢发动机汽车等。
具体地,电机100包括金属件、转子铁芯120、转轴130、导电轴承140和弹性导电件150,其中,转子铁芯120设在金属件的一侧。具体地,金属件可以为电机100的端盖111,或者是电机100的机壳112等。当金属件为端盖111时,端盖111位于转子铁芯120的轴向一侧。当金属件为机壳112时,机壳112围设在转子铁芯120的周向外侧。转子铁芯120具有轴孔,轴孔沿轴向贯穿设在转子铁芯120上,转轴130穿设于轴孔内,转轴130与转子铁芯120相连,转轴130包括相背的两个外露端,分别为第一外露端和第二外露端,第一外露端用于与车辆的车轮等负载连接,以在转轴130转动时驱动车轮转动,实现动力输出。导电轴承140套设在转轴130的端部,导电轴承140是独立于电机100的回转轴承180以外的附加轴承,起到连接转轴130和弹性导电件150的作用。进一步地,导电轴承140套设在第二外露端上。弹性导电件150的至少部分设在导电轴承140和金属件之间,弹性导电件150通过自身弹性变形产生压紧力,从而与导电轴承140紧密接触,进而可以减小弹性导电件150与导电轴承140之间的接触电阻,起到对轴电流的引导作用,防止轴电流对电机100的回转轴承180的腐蚀,延长导电轴承140、回转轴承180的使用寿命,同时,通过弹性导电件150的自身形变产生的压紧力来实现与导电轴承140达到受力平衡,确保导电轴承140受力均匀,也就是说,尽管导电轴承140会随 着转轴130发生轴向以及径向的窜动,而由于弹性导电件150的自适应能力,可以令弹性导电件150一直稳定地与导电轴承140接触,不会由于导电轴承140窜动而无法有效接触,确保导电连通。同时,也能够防止导电轴承140因应力集中损坏,避免导电轴承140因为偏载力而出现异常磨损的情况。此外,本申请仅通过在转轴130上套设导电轴承140和弹性导电件150,即可实现防腐蚀的作用,具有结构简单,布置合理、成本低廉、装配简单等优点。
实施例十一
根据本申请的第三个方面,提供了一种电机100,如图12、图16和图24所示,其包括金属件110、转子铁芯120、转轴130、导电轴承140和弹性导电件150,其中,金属件110接地,转子铁芯120设于金属件110的一侧,转子铁芯120包括轴孔,转轴130与转子铁芯120相连,转轴130穿设于轴孔内,导电轴承140套设于转轴130上,弹性导电件150位于导电轴承140背离转子铁芯120的轴向一侧,弹性导电件150的至少一部分分别与导电轴承140和金属件110接触。
本申请提供的电机100包括金属件110、转子铁芯120、转轴130、导电轴承140和弹性导电件150,其中,转子铁芯120设在金属件110的一侧。具体地,金属件110可以为电机100的端盖111,或者是电机100的机壳112等。当金属件110为端盖111时,端盖111位于转子铁芯120的轴向一侧。当金属件110为机壳112时,机壳112围设在转子铁芯120的周向外侧。转子铁芯120具有轴孔,轴孔沿轴向贯穿设在转子铁芯120上,转轴130穿设于轴孔内,转轴130与转子铁芯120相连。具体地,转轴130包括相背的两个外露端,分别为第一外露端和第二外露端,具体地,当电机100应用于车辆时,电机100可以作为驱动电机,第一外露端用于与车辆的车轮等负载连接,从而在转轴130转动时能够驱动车轮转动,实现动力输出。导电轴承140套设在转轴130上,导电轴承140是独立于电机100的回转轴承180以外的附加轴承,导电轴承140起到连接转轴130和弹性导电件150的作用。进一步地,导电轴承140套设在第二外露端上,也就是说,导电轴承140套设在转轴130的非负载端部。其中,弹性导电件150位于导电轴承140背离转子铁芯120的轴向一侧,且弹性导电件150的至少部分设在导电轴承140和金属件110之间,也就是说,导电轴承140和金属件110之间存在轴向延伸的间隙,弹性导电件150的至少部分位于该间隙内,弹性导电件150的轴向一侧与导电轴承140接触,弹性导电件150的轴向另一侧与金属件110接触,不仅能够令弹性导电件150自身的加工更加方便,与此同时也能减小弹性导电件150的装配难度。同时,弹性导电件150通过自身弹性变形产生压紧力,从而可以紧密夹设于导电轴承140和金属件110之间,实现分别与导电轴承140和金属件110紧密接触,进而可以减小金属件110、弹性导电件150和导电轴承140之间的接触电阻,起到对轴电流的引导作用,防止轴电流对电机100的回转轴承180的腐蚀, 延长导电轴承140、回转轴承180的使用寿命。同时,弹性导电件150能够产生的弹力在一定范围内,也就是说,随着导电轴承140受力不同时,则弹性导电件150能够根据导电轴承140传递的作用力适应性调整,即能够通过弹性导电件150的自身形变产生的压紧力来实现与导电轴承140达到受力平衡,确保导电轴承140受力均匀,也就是说,尽管导电轴承140会随着转轴130发生轴向以及径向的窜动,而由于弹性导电件150的自适应能力,可以令弹性导电件150一直稳定地分别与导电轴承140和金属件110接触,不会由于导电轴承140被转轴130带动偏移而无法有效接触,确保导电连通。与此同时,弹性导电件150也能够防止导电轴承140因应力集中损坏,避免导电轴承140因为偏载力而出现异常磨损的情况。此外,本申请仅通过在转轴130上套设导电轴承140和弹性导电件150,即可实现防腐蚀的作用,具有结构简单,布置合理、成本低廉、装配简单等优点。
具体地,电机100还包括定子190,定子190围设在转子铁芯120的外周,定子190包括定子铁芯191和定子绕组192,定子绕组192绕设在定子铁芯191上。关于电机100的工作原理对于本领域普通技术人员而言都是已知的,这里不再详细描述。
需要说明的是,导电轴承140包括轴承内圈141和套设在轴承内圈141外的轴承外圈142,轴承内圈141和轴承外圈142之间具有空隙。导电轴承140还包括两个密封圈,两个密封圈分别密封在轴承外圈142与轴承内圈141沿轴线方向(即厚度方向)的两端之间,即两个密封圈分别密封在导电轴承140沿轴线方向(即厚度方向)的两侧空隙,导电轴承140的钢球密封在两个密封圈、轴承内圈141和轴承外圈142之间,轴承内圈141和轴承外圈142之间的空隙中填充有导电润滑脂,轴电流可以经过转轴130泄漏至导电轴承140的轴承内圈141,然后再通过导电润滑脂快速传导至轴承外圈142,从而确保导电轴承140具有优良的导电性能。由于导电润滑脂的存在,轴承内圈141和轴承外圈142之间的电阻减小,具有良好的导电性能,与回转轴承180相比较,导电轴承140的电阻更小。具体地,导电轴承140为深沟球轴承。
进一步地,导电轴承140起到导通轴电流的作用,选用尺寸系列更小的导电轴承140可以获得更好的高速性能和导电性能。因此,导电轴承140的尺寸远小于回转轴承180的尺寸。进一步地,导电轴承140安装在转轴130的尾端(非负载端部,第二外露端),导电轴承140与弹性导电件150紧密接触并导通。
进一步地,轴电流通过导电轴承140的轴承外圈142后,再通过弹性导电件150被引导至金属件110处。
需要说明的是,弹性导电件150在压缩状态下设于金属件110和导电轴承140之间,弹性导电件150为了恢复原状而产生的反向作用力会压紧在导电轴承140和金属件110上。进一步地,关于弹性导电件150与金属件110的连接方式可以为二者直接连接,也可以为弹性导电件150通过其 他导电部件与金属件110间接相连,也就是说,轴电流能够通过弹性导电件150直接被引导至金属件110处,也可以通过其他导电部件间接传递。
其中,金属件110接地设置,可以实现轴电流经过金属件110泄放至大地。
能够想到的是,本申请提供的电机100,不仅可以应用于车辆领域,作为车辆的驱动电机100,当然,也能够应用于家电设备领域,比如,空调设备、衣物处理设备、烹饪器具等。
进一步地,如图13、图17、图19和图25所示,弹性导电件150与金属件110和导电轴承140中至少一者之间具有缓冲空间150a。
在该实施例中,弹性导电件150可以与金属件110之间具有缓冲空间150a,和/或,弹性导电件150与导电轴承140之间具有缓冲空间150a。弹性件导电件受到导电轴承140和金属件110的挤压,从而稳定安装于二者之间的间隙内,实现导电轴承140、弹性导电件150和金属件110之间的紧密接触,进而形成良好的导电通路。
需要说明的是,弹性导电件150与金属件110和/或导电轴承140之间形成的缓冲空间150a,一方面能够提升装配可靠性,适应于多变的安装环境,金属件110和导电轴承140之间的安装间隙在轴向上具有标准高度,在实际装配过程中,安装间隙的轴向高度可能会存在些许偏差,缓冲空间150a则允许弹性导电件150在轴向上的进一步形变,以适应于不同的安装环境。另一方面,在电机100运行过程中,转轴130可能会存在轴向上的窜动,与此同时,位于转轴130上的导电轴承140也会存在轴向位移,此时,弹性导电件150会受到进一步压缩,弹性导电件150和其轴向两侧的导电轴承140、金属件110之间的缓冲空间150a,则会为进一步压缩提供可能性,可以为导电轴承140的轴向窜动提供缓冲余量,防止处于导电轴承140和金属件110之间的弹性导电件150处于压缩最大状态,而无法承载电机100运行过程中可能存在的进一步压缩,避免导电轴承140、弹性导电件150和金属件110之间存在轴向上的硬性接触,降低导电轴承140、弹性导电件150和金属件110的磨损率,提升电机100产品的使用寿命。
进一步地,如图14、图15、图18、图20、图21、图22和图23所示,弹性导电件150包括相连部1510和至少两个弹力部1520,至少两个弹力部1520分别与相连部1510相连,至少两个弹力部1520中每个弹力部1520相较于相连部1510的曲折延伸以形成缓冲空间150a。
在该实施例中,弹性导电件150包括相连部1510和弹力部1520,相连部1510能够为弹力部1520提供结构支撑,即相连部1510能够起到支撑作用。弹力部1520相对于相连部1510曲折延伸,具体地,弹力部1520相较于相连部1510至少沿轴向曲折延伸,弹力部1520与导电轴承140之间和/或金属件110之间可以形成缓冲空间150a。在导电轴承140和金属件110的挤压作用下,弹力部1520能够相较于相连部1510发生形变,从而提供反向弹力,以使弹性导电件150夹紧于导电轴承140和金属件110之 间。
具体地,弹力部1520相较于相连部1510而言外凸设置,也就是说,弹力部1520超出相连部1510显露出来,从而以方便弹力部1520和导电轴承140和/或金属件110接触。
需要说明的是,当弹力部1520相较于相连部1510的延伸方向不同、外凸方向不同时,则弹性导电件150与导电轴承140和金属件110的接触位置可能会存在各异。
比如,弹力部1520与导电轴承140接触,相连部1510与金属件110接触。在另一种可能的设计中,弹力部1520与金属件110接触,相连部1510与导电轴承140接触。在又一种可能的设计中,弹力部1520的外凸方向不同,可能一种外凸方向的弹力部1520与导电轴承140接触,另一种外凸方向的弹力部1520与金属件110接触,在该实施例中,相连部1510与导电轴承140和金属件110之间均不接触。
能够想到地是,相连部1510的主要作用用于连接支撑弹力部1520,当相连部1510用于与导电轴承140或金属件110接触时,可以令相连部1510在轴向上呈波折状,那么相连部1510也能够具有一定的可形变作用,在弹力部1520的基础上进一步为弹性导电件150整体增加可形变能力。
进一步地,弹力部1520的数量为至少两个,至少两个弹力部1520均匀设置在相连部1510上。
在该实施例中,均匀设置在相连部1510上的弹力部1520,能够令导电轴承140的受力均衡,防止导电轴承140由于弹性导电件150的设置而受力不均衡发生偏移而磨损加剧。
进一步地,如图14、图15和图18所示,至少两个弹力部1520中一个弹力部1520朝向导电轴承140凸出形成第一弹性凸部1521,第一弹性凸部1521与导电轴承140接触,至少两个弹力部1520中另一个弹力部1520背离导电轴承140凹陷形成第一弹性凹部1522,第一弹性凹部1522与金属件110接触。
在该实施例中,弹力部1520的数量为至少两个,至少两个弹力部1520包括第一弹性凸部1521和第二弹性凸部1523,第一弹性凸部1521相较于相连部1510而言朝向导电轴承140凸出,第一弹性凸部1521与导电轴承140相接触,第二凸出相较于相连部1510而言背离导电轴承140凹陷,第二弹性凸部1523与金属件110接触,第一弹性凸部1521与金属件110之间具有第一缓冲空间,第二弹性凸部1523与导电轴承140之间具有第二缓冲空间,在电机100运行过程中,第一弹性凸部1521受到导电轴承140的作用力会被压缩,此时,第一弹性凸部1521具有朝向金属件110运动的趋势,此时第一缓冲空间的容积会减小。同理,与此同时,第二弹性凸部1523受到金属件110的作用力会被压缩,此时,第二弹性凸部1523具有朝向导电轴承140运动的趋势,此时第二缓冲空间的容积会减小。在第一弹性凸部1521和第二弹性凸部1523分别朝各自相较于相连部1510外露方向的反 向运动时,进而以为弹性导电件150提供进一步的压缩可能性,使得在电机100运行过程中,金属件110、弹性导电件150、导电轴承140之间仍旧为柔性接触,降低导电轴承140、弹性导电件150和金属件110的磨损率,提升电机100产品的使用寿命。
进一步地,如图18所示,第一弹性凸部1521的数量为至少两个,第一弹性凹部1522的数量为至少两个,至少两个第一弹性凸部1521中任一者位于至少两个第一弹性凹部1522中相邻的两个之间。
在该实施例中,第一弹性凸部1521的数量为至少两个,第一弹性凹部1522的数量也为至少两个,一个第一弹性凸部1521位于相邻两个第二弹性凸部1523之间,即第一弹性凸部1521和第二弹性凸部1523一个接一个间隔排布。对于弹性导电件150而言,具有朝向导电轴承140的第一轴侧,也包括朝向金属件110的第二轴侧,对于第一轴侧而言,具有多个间隔排布的第一弹性凸部1521以与导电轴承140接触,对于第二轴侧而言,具有相同个数的第二弹性凸部1523以与金属件110接触,从而为导电轴承140和金属件110提供基本等同的弹力支撑。
与此同时,对于弹性导电件150而言,第一弹性凸部1521受到导电轴承140施加的作用力,与之相邻的第一弹性凹部1522则会受到金属件110施加的反向作用力,即弹性导电件150自身的受力方向多样,防止弹性导电件150在同一方向作用力过于集中而可能存在的疲劳断裂,提升弹性导电件150的结构稳定性。
进一步地,如图20、图21、图22和图23所示,至少两个弹力部1520分别朝靠近导电轴承140的方向凸出形成第二弹性凸部1523,至少两个第二弹性凸部1523分别与导电轴承140接触,相连部1510与金属件110接触。
在该实施例中,至少两个弹力部1520中每个弹力部1520都朝向导电轴承140凸出形成第二弹性凸部1523,第二弹性凸部1523相较于相连部1510而言朝向导电轴承140凸出,第二弹性凸部1523与导电轴承140相接触,与此同时,第二弹性凸部1523与金属件110之间具有缓冲空间150a,在电机100运行过程中,第二弹性凸部1523具有朝向金属件110运动的趋势,缓冲空间150a的容积减小,从而为弹性导电件150提供进一步的压缩可能性,使得弹性导电件150和导电轴承140之间为柔性接触,降低导电轴承140和弹性导电件150之间磨损率,提升电机100产品的使用寿命。相连部1510此时不仅起到支撑连接第二弹性凸部1523的作用,还起到与金属件110接触连接的作用,以实现转轴130、导电轴承140、导电连接件170与金属件110之间的导通连接。
需要说明的是,弹性导电件150中的弹力部1520均朝同一方向凸出设置,从而可以减小弹性导电件150的加工难度和装配难度。
进一步地,如图14、图15、图18和图23所示,相连部1510为连接曲部1511,连接曲部1511的数量为至少两个,至少两个连接曲部1511中 任一个连接曲部1511分别与至少两个弹力部1520中相邻两个弹力部1520相连。
在该实施例中,至少两个弹力部1520可以通过至少两个连接曲部1511实现连接,其中,多个连接曲部1511中任一个连接曲部1511连接在相邻的两个弹力部1520之间,即至少两个连接曲部1511和至少两个弹力部1520首尾相连构成弹性导电件150。其中,至少两个弹力部1520可以朝靠近导电轴承140的方向凸出形成弹性凸部,也可以背离导电轴承140凹陷以形成弹性凹部。即至少两个连接曲部1511之间可以连接第一弹性凸部1521/第一弹性凹部1522/第二弹性凸部1523之间的任意组合。
具体地,当弹力部1520包括第一弹性凸部1521和第一弹性凹部1522时,第一弹性凸部1521和第一弹性凹部1522分别连接在两个连接曲部1511之间,此时,弹性导电件150整体呈波形弯曲结构,朝向导电轴承140凸出的第一弹性凸部1521可以视为波峰,背离导电轴承140凹陷的第一弹性凹部1522可以视为波谷,连接曲部1511可以视为波峰和波谷之间的过渡部。第一弹性凸部1521和第一弹性凹部1522产生的弹力可以传递至导电轴承140和金属件110处,令弹性导电件150夹紧设置在金属件110和导电轴承140之间,令二者之间的接触电阻变小,使得轴电流更容易经由导电轴承140、弹性导电件150传递至金属件110处,进而以实现接地,明显降低对于回转轴承180的腐蚀。而具体地,当弹力部1520包括第二弹性凸部1523时,则每个第二弹性凸部1523均连接在相邻两个连接曲部1511之间。
进一步地,如图20、图21和图22所示,相连部1510为连接环1512,至少两个第二弹性凸部1523分别设置在相连部1510的外周沿。
在该实施例中,相连部1510为连接环1512,连接环1512的外轮廓呈圆形,连接环1512包括外周沿,至少两个第二弹性凸部1523分别设置在相连部1510的外周沿。对于每个第二弹性凸部1523而言,第二弹性凸部1523包括相背的连接端和接触端,连接端设置在相连部1510的外周沿上,接触端至少沿轴向延伸以与导电轴承140接触,对于第二弹性凸部1523自身而言,由于弹性导电件150为钣金折弯件,受限于加工方式,连接端必然会在径向方向有一定的延伸。在转轴130转动过程中,不可避免地,导电轴承140会受到些许径向上的偏载力,与此同时,导电轴承140会把至少部分径向上偏载力传递至弹性导电件150,那么对于弹性导电件150而言,在径向上延伸的连接端能够起到很好的缓冲作用,防止第二弹性凸部1523受到径向力冲击而断裂。
进一步地,如图20、图21和图22所示,至少两个第二弹性凸部1523中每个第二弹性凸部1523的一部分沿着相连部1510的外周沿延伸以形成延伸段,至少两个第二弹性凸部1523中相邻两个第二弹性凸部1523的延伸段彼此靠近并连接。
在该实施例中,第二弹性凸部1523连接端和接触端,连接端设置在相 连部1510的外周沿上,与此同时,相邻两个第二弹性凸部1523的一部分彼此靠近延伸形成延伸段,相邻两个第二弹性凸部1523的延伸段相互靠近并连接,也就是说,对于每个第二弹性凸部1523而言,其与相连部1510的接触面积有效增加,与此同时,相邻两个第二弹性凸部1523之间也存在相互连接,从而可以令第二弹性凸部1523的结构稳定性更佳,在一个第二弹性凸部1523受力后发生形变时,与之相邻的第二弹性凸部1523和相连部1510均能够为其提供结构支撑,延长弹性导电件150的使用寿命。
进一步地,至少两个弹力部1520分别朝远离导电轴承140的方向凹陷形成第二弹性凹部,至少两个第二弹性凹部与金属件110接触,相连部1510与导电轴承140接触。
在该实施例中,至少两个弹力部1520中每个弹力部1520都朝背离导电轴承140凹陷形成第二弹性凹部,第二弹性凹部相较于相连部1510而言背离导电轴承140凹陷,第二弹性凹部与金属件110相接触,与此同时,第二弹性凹部与导电轴承140之间具有缓冲空间150a,在电机100运行过程中,第二弹性凹部具有朝向导电轴承140运动的趋势,缓冲空间150a的容积减小,从而为弹性导电件150提供进一步的压缩可能性,使得弹性导电件150和金属件110之间为柔性接触,金属件110和弹性导电件150之间磨损率,提升电机100产品的使用寿命。相连部1510此时不仅起到支撑连接第二弹性凹部的作用,还起到与导电轴承140接触连接的作用,以实现转轴130、导电轴承140、导电连接件170与金属件110之间的导通连接。
需要说明的是,弹性导电件150中的弹力部1520均朝同一方向凸出设置,从而可以减小弹性导电件150的加工难度和装配难度。
进一步地,如图26和图27所示,弹性导电件150具有多个缓冲腔150b。
在该实施例中,弹性导电件150不仅与导电轴承140和/或金属件110之间形成缓冲空间150a,与此同时,弹性导电件150自身还具有多个缓冲腔150b,在弹性导电件150受压缩的过程中,缓冲空间150a和多个缓冲腔150b均能够为弹性导电件150提供反向弹力,多个缓冲腔150b能够为弹性导电件150提供弹力储备,使得弹性导电件150面对多变的安装间隙时,均能够成功装配于安装间隙内,使得弹性导电件150压缩设在导电轴承140和金属件110之间,与导电轴承140和金属件110均紧密接触,减小金属件110、弹性导电件150和导电轴承140之间的接触电阻,起到对轴电流的引导作用,防止轴电流对电机100的回转轴承180的腐蚀,延长导电轴承140、回转轴承180的使用寿命。
需要说明的是,金属件110和导电轴承140之间的安装间隙在轴向上具有标准高度,在实际装配过程中,安装间隙的轴向高度可能会存在些许偏差,即导致安装间隙的多变。
进一步地,弹性导电件150的内部呈蜂窝状,不仅能够保证自身的结构强度,不易因外部施加的作用力而发生断裂,与此同时还能够为弹性导电件150提供进一步的压缩可能性。
进一步地,如图26和图27所示,弹性导电件150包括多个沿轴向堆叠的弹片1530,多个弹片1530中每个弹片1530包括第三弹性凸部1531和第三弹性凹部1532,第三弹性凸部1531朝向导电轴承140凸出,第三弹性凹部1532与第三弹性凸部1531相连,第三弹性凹部1532背离导电轴承140凹陷,其中,多个弹片1530包括第一弹片和位于第一弹片背离导电轴承140一侧的第二弹片,第一弹片的第三弹性凸部1531与第二弹片的第三弹性凹部1532之间具有多个缓冲腔150b中的一个,第一弹片的第三弹性凹部1532与第二弹片的第三弹性凸部1531相连。
在该实施例中,弹性导电件150包括多个轴向堆叠的弹片1530,每个弹片1530的结构相同,相邻两个弹片1530之间具有旋转角度,以使相邻两个弹片1530错位堆叠。具体地,每个弹片1530包括相连的第三弹性凸部1531和第三弹性凹部1532,第三弹性凸部1531朝向导电轴承140凸出,第三弹性凹部1532背离导电轴承140凹陷,第三弹性凸部1531和第三弹性凹部1532的数量一一对应,第三弹性凸部1531的数量为至少一个,第三弹性凹部1532的数量为至少一个,第三弹性凸部1531和第三弹性凹部1532首尾相连以形成一个弹片1530。比如,当第三弹性凸部1531为2个时,第三弹性凹部1532也为2个,每个第三弹性凹部1532连接相邻两个第三弹性凹部1532之间。弹片1530整体呈波形弯曲结构,第三弹性凸部1531可以视为波峰,第三弹性凹部1532可以视为波谷。在多个弹片1530错位堆叠的过程中,自导电轴承140向金属件110的轴向方向上包括第一弹片和第二弹片,即自上而下的方向上,第一弹片的第三弹性凸部1531(波峰)与位于其下方的第二弹片的第三弹性凹部1532(波谷)相对应并形成一个缓冲腔150b,第一弹片的第三弹性凹部1532(波谷)和位于其下方的第二弹片的第三弹性凸部1531(波峰)相连,进而实现第一弹片和第二弹片之间的可靠连接性能。
进一步地,如图14、图15、图18、图20、图21、图22和图23所示,相连部1510和弹力部1520的连接处圆角过渡。
在该实施例中,相连部1510与弹力部1520的连接处存在较大应力值和应力集中现象,通过令该连接处圆角过渡,随着圆角半径的增大而减小,应力分布更趋于均匀,从而提高了弹性导电件150的疲劳安全系数。
进一步地,如图13、图17、图19和图25所示,弹性导电件150与导电轴承140的轴承外圈142接触。
在该实施例中,弹性导电件150与导电轴承140的轴承外圈142接触,轴承外圈142不随转轴130转动,则弹性导电件150和轴承外圈142之间不存在相对位移活动,从而可以降低弹性导电件150、金属件110的磨损率,延长使用寿命。
也就是说,弹性导电件150与导电轴承140的轴承内圈141不接触,由于轴承内圈141会与转轴130同步转动,若弹性导电件150同时与轴承内圈141和轴承外圈142接触,则会导致轴承内圈141卡住而无法转动的 问题。
进一步地,轴承外圈142的一部分与弹性导电件150接触。
在该实施例中,轴承外圈142的一部分与弹性导电件150接触,也就是说,轴承外圈142的一部分用于导电接触,与弹性导电件150相互挤压接触,轴承外圈142的另一部分外露,与弹性导电件150不接触,从而能够减小轴承外圈142的磨损。
需要说明的是,由于弹性导电件150位于导电轴承140背离转子铁芯120的轴向一侧,则弹性导电件150与轴承外圈142的一侧轴向端面接触,弹性导电件150与轴承外圈142的周侧不接触。
进一步地,如图15、图18、图20、图21、图22、图23、图26和图27所示,弹性导电件150上设有避让口160,转轴130的一部分能够伸入避让口160内。
在该实施例中,弹性导电件150还包括避让口160,避让口160设在弹性导电件150上,避让口160能够避开转轴130、导电轴承140的轴承内圈141,轴承内圈141与转轴130过盈配合,轴承内圈141会随同转轴130同步转动。轴承外圈142与弹性导电件150接触导通,轴承外圈142与弹性导电件150位置静止,不会随同转轴130运动而转动。具体地,避让口160沿轴向贯穿设在弹性导电件150上。比如,弹性导电件150包括设置在相连部1510上至少两个弹力部1520,避让口160设在相连部1510上,此时,相连部1510呈环形结构。弹性导电件150包括至少两个连接曲部1511和至少两个弹力部1520,一个连接曲部1511连接在相邻两个弹力部1520之间,至少两个连接曲部1511和至少两个弹力部1520连接围合形成避让口160。
也就是说,由于避让口160的设置,弹性导电件150呈中空结构,从而可以避免弹性导电件150和转轴130、导电轴承140的内圈接触,若弹性导电件150呈非中空结构,则导电轴承140的内圈的轴向端部、转轴130会与弹性导电件150接触,产生摩擦转矩而干扰转轴130的转动。
需要说明的是,避让口160用于避让转轴130和轴承内圈141,转轴130的转动过程包括正常转动情况和轴向窜动情况,在正常转动情况下,转轴130和轴承内圈141可以不位于避让口160中,在轴向窜动情况下,转轴130和轴承内圈141可以伸入避让口160内。
进一步地,避让口160包括圆形开口。
在该实施例中,避让口160可以为圆形开口,圆形开口适应于导电轴承140中轴承内圈141、转轴130的旋转趋势,当转轴130在径向上发生些许偏移时,圆形开口能够对径向上的偏移做出较好的避让。
进一步地,弹性导电件150为钣金件。
在该实施例中,当弹性导电件150包括弹力部1520和相连部1510时,可以通过钣金冲压折弯工艺形成弹力部1520和相连部1510,与此同时,相连部1510和弹力部1520为一体式结构,相连部1510和弹力部1520具 体为一体式结构,因为一体式结构的力学性能好,因而能够提高相连部1510和多个弹力部1520之间的连接强度,另外,可将相连部1510和弹力部1520一体制成,批量生产,以提高产品的加工效率,降低产品的加工成本。并且,通过将相连部1510和弹力部1520设计为一体成型的一体式结构,提高了弹性导电件150的整体性,减少了零部件数量,减少了安装工序,提高了安装效率,使弹性导电件150的安装更为方便可靠。
进一步地,如图13、图17、图19和图25所示,电机100还包括导电连接件170,导电连接件170与金属件110相连,弹性导电件150的至少部分位于导电连接件170和导电轴承140之间。
在该实施例中,电机100还包括导电连接件170,导电连接件170分别与金属件110和弹性导电件150连接,也就是说,为了实现轴电流的引流,弹性导电件150处的轴电流未直接与金属件110相连,而是通过导电连接件170引导至金属件110处,通过设置导电连接件170,在确保导电连通的前提下,可以简化装配过程,降低制备难度。
具体地,导电连接件170为铝合金铸造件,具体地,导电连接件170呈板状结构,导电连接件170安装在电机100的端盖111上,导电连接件170与端盖111充分接触导通。
进一步地,如图13、图17、图19和图25所示,导电连接件170包括板体171和安装部172,板体171与金属件110相连。安装部172朝向转轴130设在板体171上,安装部172包括安装位,弹性导电件150和导电轴承140的一部分分别设置在安装位处。
在该实施例中,导电连接件170包括板体171和安装部172,板体171与金属件110相连。安装部172朝向转轴130设在板体171上,具体地,安装部172可以沿轴向延伸设在板体171上。安装部172包括安装位,弹性导电件150的至少一部分设置在安装位处,方便弹性导电件150的安装定位。进一步地,板体171和安装部172为一体式结构,一体式结构的力学性能好,因而能够提高板体171和安装部172之间的连接强度,另外,可将板体171和安装部172一体制成,批量生产,以提高产品的加工效率,降低产品的加工成本。并且,通过将板体171和安装部172设计为一体成型的一体式结构,提高了导电连接件170的整体性,减少了零部件数量,减少了安装工序,提高了安装效率,使导电连接件170的安装更为方便可靠。
进一步地,如图13、图17、图19和图25所示,安装部172包括支撑部172a和抵接部172b,支撑部172a设于板体171上。抵接部172b连接在支撑部172a的轴向端部,安装位设置在抵接部172b和支撑部172a之间;其中,导电轴承140的轴承外圈142与抵接部172b接触,弹性导电件150设于抵接部172b、支撑部172a和导电轴承140之间。
在该实施例中,安装部172包括支撑部172a和抵接部172b,支撑部172a沿轴向延伸设于板体171上。抵接部172b连接在支撑部172a的轴向 端部,安装位位于抵接部172b和支撑部172a之间,支撑部172a呈环形结构、抵接部172b也呈环形结构,支撑部172a的内径小于抵接部172b的内径,即安装位呈现为环形台阶位(环形沉孔)。在装配过程中,由于环形沉孔的直径大于导电轴承140的外径(即轴承外圈142的外径),轴承外圈142设置在抵接部172b的一部分内壁上,其中,沉孔与导电轴承140为同心结构。在抵接部172b的另一部分内壁、支撑部172a和导电轴承140之间会形成环形的安装间隙,该安装间隙用于容纳弹性导电件150的至少一部分。弹性导电件150通过弹性变形而与导电轴承140、安装部172充分接触,进而形成良好的导电通路。
需要说明的是,轴电流包括两个导电通路,其一为依次通过转轴130、导电轴承140、弹性导电件150、导电连接件170和金属件110。其二为依次经过转轴130、回转轴承180和端盖111。而由于导电通路一的电阻小于导电通路二,即轴电流会优先从导电通路一传递,防止轴电流对回转轴承180的腐蚀,延长回转轴承180的使用寿命。
进一步地,如图13、图17、图19和图25所示,支撑部172a能够对导电轴承140和弹性导电件150构成轴向限位,抵接部172b能够为导电轴承140和弹性导电件150构成径向限位,在确保导电接触的前提下,也便于弹性导电件150和导电轴承140的定位安装。
进一步地,抵接部172b包括抵接壁1721、轴侧壁1722和导向部,抵接壁1721朝向导电轴承140,轴侧壁1722背离支撑部172a,导向部设于抵接壁1721与轴侧壁1722的连接处。
在该实施例中,抵接部172b包括抵接壁1721、轴侧壁1722和导向部,抵接壁1721朝向弹性导电件150和导电轴承140,导电轴承140的轴承外圈142与抵接壁1721的一部分抵接,弹性导电件150能够与抵接壁1721的另一部分接触,从而可以增加弹性导电件150和导电连接件170的接触面积,提升导电通路的可靠性。轴侧壁1722背离支撑部172a设置,即轴侧壁1722为朝向转子铁芯120的轴向端壁,导向部设于抵接壁1721与轴侧壁1722的连接处。当弹性导电件150和导电轴承140安装于支撑部172a和抵接壁1721所形成的安装位时,导向部能够方便弹性导电件150和导电轴承140的装配,降低装配难度。值得说明的是,导向部可以为导向弧面、导向斜面1723等。
进一步地,如图13、图17、图19和图25所示,支撑部172a具有朝向转轴130开口的中空腔。
在该实施例中,支撑部172a具有朝向转轴130开口的中空腔,中空腔能够避免导电连接件170和导电轴承140的内圈、转轴130接触,若导电连接件170呈非中空结构,则导电轴承140的内圈的轴向端部/转轴130可能会与导电连接件170干涉,产生摩擦转矩而干扰导电轴承140的转动。
进一步地,如图13、图17、图19和图25所示,金属件110包括端盖111,端盖111设在转子铁芯120的轴向一侧,弹性导电件150的至少一部 分设在端盖111与导电轴承140之间。
在该实施例中,金属件110包括端盖111,端盖111设在转子铁芯120的轴向一侧。具体地,端盖111靠近转轴130的第二外露端设置,即端盖111为后端盖。弹性导电件150的至少一部分设在端盖111与导电轴承140之间,端盖111距离导电轴承140的位置较近,能够快速将轴电流引导出,同时也能够节省弹性导电件150、导电连接件170的材料成本,令导电通路的布置更加合理化。
进一步地,导电轴承140的内径为D1,导电轴承140的内外圈电阻为R1。电机100还包括回转轴承180,回转轴承180套设在转轴130上,回转轴承180位于导电轴承140背离端盖111的一侧,回转轴承180的内径为D2,回转轴承180的内外圈电阻为R2,其中,D1<D2,R1<R2。
在该实施例中,金属件110与回转轴承180之间的电阻,大于金属件110与导电轴承140之间的电阻,从而使得轴电流能够优先从导电轴承140所在通路流出。需要说明的是,回转轴承180起到回转支撑转轴130的作用。回转轴承180内外圈之间的电阻大于导电轴承140的内外圈电阻,回转轴承180的内径大于导电轴承140的内径,进一步地利于轴电流通过导电轴承140与金属件110连接,防止轴电流对回转轴承180的腐蚀,延长轴承的使用寿命。
实施例十二
根据本申请的第四个方面,提供了一种车辆,包括上述任一设计所提供的电机100。本申请提供的车辆,包括上述任一设计所提供的电机100,因此具有该电机100的全部有益效果,在此不再赘述。值得说明的是,车辆可以为新能源汽车。其中,新能源汽车包括纯电动汽车、增程式电动汽车、混合动力汽车、燃料电池电动汽车、氢发动机汽车等。
本申请提供的电机100包括金属件110、转子铁芯120、转轴130、导电轴承140和弹性导电件150,其中,转子铁芯120设在金属件110的一侧。具体地,金属件110可以为电机100的端盖111,或者是电机100的机壳112等。当金属件110为端盖111时,端盖111位于转子铁芯120的轴向一侧。当金属件110为机壳112时,机壳112围设在转子铁芯120的周向外侧。转子铁芯120具有轴孔,轴孔沿轴向贯穿设在转子铁芯120上,转轴130穿设于轴孔内,转轴130与转子铁芯120相连。具体地,转轴130包括相背的两个外露端,分别为第一外露端和第二外露端,具体地,当电机100应用于车辆时,电机100可以作为驱动电机,第一外露端用于与车辆的车轮等负载连接,从而在转轴130转动时能够驱动车轮转动,实现动力输出。导电轴承140套设在转轴130上,导电轴承140是独立于电机100的回转轴承180以外的附加轴承,导电轴承140起到连接转轴130和弹性导电件150的作用。进一步地,导电轴承140套设在第二外露端上,也就是说,导电轴承140套设在转轴130的非负载端部。其中,弹性导电件150位于导电轴承140背离转子铁芯120的轴向一侧,且弹性导电件150的至 少部分设在导电轴承140和金属件110之间,也就是说,导电轴承140和金属件110之间存在轴向延伸的间隙,弹性导电件150的至少部分位于该间隙内,弹性导电件150的轴向一侧与导电轴承140接触,弹性导电件150的轴向另一侧与金属件110接触,不仅能够令弹性导电件150自身的加工更加方便,与此同时也能减小弹性导电件150的装配难度。同时,弹性导电件150通过自身弹性变形产生压紧力,从而可以紧密夹设于导电轴承140和金属件110之间,实现分别与导电轴承140和金属件110紧密接触,进而可以减小金属件110、弹性导电件150和导电轴承140之间的接触电阻,起到对轴电流的引导作用,防止轴电流对电机100的回转轴承180的腐蚀,延长导电轴承140、回转轴承180的使用寿命。同时,弹性导电件150能够产生的弹力在一定范围内,也就是说,随着导电轴承140受力不同时,则弹性导电件150能够根据导电轴承140传递的作用力适应性调整,即能够通过弹性导电件150的自身形变产生的压紧力来实现与导电轴承140达到受力平衡,确保导电轴承140受力均匀,也就是说,尽管导电轴承140会随着转轴130发生轴向以及径向的窜动,而由于弹性导电件150的自适应能力,可以令弹性导电件150一直稳定地分别与导电轴承140和金属件110接触,不会由于导电轴承140被转轴130带动偏移而无法有效接触,确保导电连通。与此同时,弹性导电件150也能够防止导电轴承140因应力集中损坏,避免导电轴承140因为偏载力而出现异常磨损的情况。此外,本申请仅通过在转轴130上套设导电轴承140和弹性导电件150,即可实现防腐蚀的作用,具有结构简单,布置合理、成本低廉、装配简单等优点。
具体地,电机100还包括定子190,定子190围设在转子铁芯120的外周,定子190包括定子铁芯191和定子绕组192,定子绕组192绕设在定子铁芯191上。关于电机100的工作原理对于本领域普通技术人员而言都是已知的,这里不再详细描述。
需要说明的是,导电轴承140包括轴承内圈141和套设在轴承内圈141外的轴承外圈142,轴承内圈141和轴承外圈142之间具有空隙。导电轴承140还包括两个密封圈,两个密封圈分别密封在轴承外圈142与轴承内圈141沿轴线方向(即厚度方向)的两端之间,即两个密封圈分别密封在导电轴承140沿轴线方向(即厚度方向)的两侧空隙,导电轴承140的钢球密封在两个密封圈、轴承内圈141和轴承外圈142之间,轴承内圈141和轴承外圈142之间的空隙中填充有导电润滑脂,轴电流可以经过转轴130泄漏至导电轴承140的轴承内圈141,然后再通过导电润滑脂快速传导至轴承外圈142,从而确保导电轴承140具有优良的导电性能。由于导电润滑脂的存在,轴承内圈141和轴承外圈142之间的电阻减小,具有良好的导电性能,与回转轴承180相比较,导电轴承140的电阻更小。具体地,导电轴承140为深沟球轴承。
进一步地,导电轴承140起到导通轴电流的作用,选用尺寸系列更小的导电轴承140可以获得更好的高速性能和导电性能。因此,导电轴承140 的尺寸远小于回转轴承180的尺寸。进一步地,导电轴承140安装在转轴130的尾端(非负载端部,第二外露端),导电轴承140与弹性导电件150紧密接触并导通。
进一步地,轴电流通过导电轴承140的轴承外圈142后,再通过弹性导电件150被引导至金属件110处。
需要说明的是,弹性导电件150在压缩状态下设于金属件110和导电轴承140之间,弹性导电件150为了恢复原状而产生的反向作用力会压紧在导电轴承140和金属件110上。进一步地,关于弹性导电件150与金属件110的连接方式可以为二者直接连接,也可以为弹性导电件150通过其他导电部件与金属件110间接相连,也就是说,轴电流能够通过弹性导电件150直接被引导至金属件110处,也可以通过其他导电部件间接传递。
其中,金属件110接地设置,可以实现轴电流经过金属件110泄放至大地。
进一步地,弹性导电件150可以与金属件110之间具有缓冲空间150a,和/或,弹性导电件150与导电轴承140之间具有缓冲空间150a。弹性件导电件受到导电轴承140和金属件110的挤压,从而稳定安装于二者之间的间隙内,实现导电轴承140、弹性导电件150和金属件110之间的紧密接触,进而形成良好的导电通路。
需要说明的是,弹性导电件150与金属件110和/或导电轴承140之间形成的缓冲空间150a,一方面能够提升装配可靠性,适应于多变的安装环境,金属件110和导电轴承140之间的安装间隙在轴向上具有标准高度,在实际装配过程中,安装间隙的轴向高度可能会存在些许偏差,缓冲空间150a则允许弹性导电件150在轴向上的进一步形变,以适应于不同的安装环境。另一方面,在电机100运行过程中,转轴130可能会存在轴向上的窜动,与此同时,位于转轴130上的导电轴承140也会存在轴向位移,此时,弹性导电件150会受到进一步压缩,弹性导电件150和其轴向两侧的导电轴承140、金属件110之间的缓冲空间150a,则会为进一步压缩提供可能性,可以为导电轴承140的轴向窜动提供缓冲余量,防止处于导电轴承140和金属件110之间的弹性导电件150处于压缩最大状态,而无法承载电机100运行过程中可能存在的进一步压缩,避免导电轴承140、弹性导电件150和金属件110之间存在轴向上的硬性接触,降低导电轴承140、弹性导电件150和金属件110的磨损率,提升电机100产品的使用寿命。
其中,关于弹性导电件150的具体结构至少包括以下:弹性导电件150包括相连部1510和弹力部1520,相连部1510能够为弹力部1520提供结构支撑,即相连部1510能够起到支撑作用。弹力部1520相对于相连部1510曲折延伸,具体地,弹力部1520相较于相连部1510至少沿轴向曲折延伸,弹力部1520与导电轴承140之间和/或金属件110之间可以形成缓冲空间150a。在导电轴承140和金属件110的挤压作用下,弹力部1520能够相较于相连部1510发生形变,从而提供反向弹力,以使弹性导电件150夹紧于 导电轴承140和金属件110之间。或者,弹性导电件150包括多个轴向堆叠的弹片1530,每个弹片1530的结构相同,相邻两个弹片1530之间具有旋转角度,以使相邻两个弹片1530错位堆叠。具体地,每个弹片1530包括相连的第三弹性凸部1531和第三弹性凹部1532,第三弹性凸部1531朝向导电轴承140凸出,第三弹性凹部1532背离导电轴承140凹陷,第三弹性凸部1531和第三弹性凹部1532的数量一一对应,第三弹性凸部1531的数量为至少一个,第三弹性凹部1532的数量为至少一个,第三弹性凸部1531和第三弹性凹部1532首尾相连以形成一个弹片1530。比如,当第三弹性凸部1531为2个时,第三弹性凹部1532也为2个,每个第三弹性凹部1532连接相邻两个第三弹性凹部1532之间。弹片1530整体呈波形弯曲结构,第三弹性凸部1531可以视为波峰,第三弹性凹部1532可以视为波谷。在多个弹片1530错位堆叠的过程中,自导电轴承140向金属件110的轴向方向上包括第一弹片和第二弹片,即自上而下的方向上,第一弹片的第三弹性凸部1531(波峰)与位于其下方的第二弹片的第三弹性凹部1532(波谷)相对应并形成一个缓冲腔150b,第一弹片的第三弹性凹部1532(波谷)和位于其下方的第二弹片的第三弹性凸部1531(波峰)相连,进而实现第一弹片和第二弹片之间的可靠连接性能。
在本申请中,术语“多个”则指两个或两个以上,除非另有明确的限定。术语“安装”、“相连”、“连接”、“固定”等术语均应做广义理解,例如,“连接”可以是固定连接,也可以是可拆卸连接,或一体地连接;“相连”可以是直接相连,也可以通过中间媒介间接相连。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本申请中的具体含义。
在本说明书的描述中,术语“一个实施例”、“一些实施例”、“具体实施例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或特点包含于本申请的至少一个实施例或示例中。在本说明书中,对上述术语的示意性表述不一定指的是相同的实施例或实例。而且,描述的具体特征、结构、材料或特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上所述仅为本申请的优选实施例而已,并不用于限制本申请,对于本领域的技术人员来说,本申请可以有各种更改和变化。凡在本申请的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本申请的保护范围之内。

Claims (54)

  1. 一种电机,其中,包括:
    金属件,所述金属件接地;
    转子铁芯,设于所述金属件的一侧,所述转子铁芯包括轴孔;
    转轴,与所述转子铁芯相连,并穿设于所述轴孔内;
    导电轴承,套设于所述转轴;
    弹性导电件,所述弹性导电件的至少部分设在所述导电轴承和所述金属件之间。
  2. 根据权利要求1所述的电机,其中,所述弹性导电件包括:
    连接部;
    多个弹性部,分别与所述连接部相连,每个所述弹性部曲折延伸设置,所述弹性部设在所述导电轴承和所述金属件之间。
  3. 根据权利要求2所述的电机,其中,所述弹性部包括:
    第一接触部,与所述连接部相连,所述第一接触部朝背离中心轴线的方向凸出;
    第二接触部,与所述第一接触部相连,所述第二接触部朝靠近中心轴线的方向凸出,所述第二接触部的至少一部分与所述导电轴承相接触。
  4. 根据权利要求2所述的电机,其中,所述弹性部包括:
    第一接触部,所述第一接触部的第一端弯曲后连接在所述连接部上,所述第一接触部的第二端沿轴向延伸;
    第二接触部,与所述第一接触部的第二端相连,所述第二接触部朝背离或朝向中心轴线的方向卷曲。
  5. 根据权利要求2所述的电机,其中,所述弹性部设置在所述连接部的外周壁上。
  6. 根据权利要求2所述的电机,其中,每个所述弹性部的至少一部分位于所述连接部的轴向一侧。
  7. 根据权利要求1所述的电机,其中,所述弹性导电件包括:
    多个连接部;
    多个弹性部,多个所述弹性部中任一个所述弹性部连接在两个所述连接部之间,每个所述弹性部朝背离或朝向中心轴线的方向凸出。
  8. 根据权利要求7所述的电机,其中,多个所述连接部中至少一个所述连接部呈弯曲状。
  9. 根据权利要求7所述的电机,其中,
    多个所述弹性部中每个所述弹性部朝背离中心轴线的方向凸出形成第一弹性部;
    多个所述连接部中每个所述连接部朝背离中心轴线的方向弯曲形成第一连接部;
    每个所述第一连接部包括朝向中心轴线的壁面为圆弧面,所述圆弧面与所 述导电轴承相接触。
  10. 根据权利要求7所述的电机,其中,
    多个所述弹性部中每个所述弹性部朝向中心轴线的方向凸出形成第二弹性部,所述第二弹性部包括朝向中心轴线的接触部,所述接触部与所述导电轴承相接触;多个所述连接部中每个所述连接部朝背离中心轴线的方向弯曲形成第一连接部。
  11. 根据权利要求7所述的电机,其中,
    多个所述弹性部中每个所述弹性部朝背离中心轴线的方向凸出形成第一弹性部;
    多个所述连接部中每个所述连接部朝靠近中心轴线的方向凸出形成第二连接部;
    每个所述第二连接部包括朝向中心轴线接触端,所述接触端抵接在所述导电轴承的外周。
  12. 根据权利要求7所述的电机,其中,所述弹性导电件还包括:
    释放口,设于多个所述连接部中的任一个上。
  13. 根据权利要求12所述的电机,其中,所述释放口位于所述连接部的中心。
  14. 根据权利要求12所述的电机,其中,所述释放口沿所述弹性导电件的轴向贯穿设置。
  15. 根据权利要求2至14中任一项所述的电机,其中,多个所述弹性部均匀间隔分布。
  16. 根据权利要求2至14中任一项所述的电机,其中,
    所述连接部和所述弹性部的连接处圆角过渡。
  17. 根据权利要求1至14中任一项所述的电机,其中,所述电机还包括:避让口,设于所述弹性导电件上,所述导电轴承的至少一部分位于所述避让开口中。
  18. 根据权利要求1至14中任一项所述的电机,其中,所述弹性导电件为钣金件。
  19. 根据权利要求1至14中任一项所述的电机,其中,所述电机还包括:导电连接件,所述导电连接件能够与所述金属件相连,所述弹性导电件的至少部分位于所述导电连接件和所述导电轴承之间。
  20. 根据权利要求11所述的电机,其中,所述导电连接件包括:
    板体,所述板体能够与所述金属件相连;
    安装部,朝向所述转轴设在所述板体上,所述安装部包括安装位,所述弹性导电件的至少一部分设置在所述安装位处。
  21. 根据权利要求20所述的电机,其中,所述安装部包括:
    支撑部,设于所述板体上;
    抵接部,连接在所述支撑部的轴向端部,所述安装位设置在所述抵接部和所述支撑部之间,所述弹性导电件分别与所述抵接部和所述支撑部接触。
  22. 根据权利要求21所述的电机,其中,所述抵接部包括:
    抵接壁,朝向所述弹性导电件;
    轴侧壁,背离所述支撑部;
    导向部,设于所述抵接壁与所述轴侧壁的连接处。
  23. 根据权利要求22所述的电机,其中,
    所述导向部包括导向斜面,所述导向斜面的轴向深度h大于0mm,小于等于5mm;所述导向斜面与所述抵接壁所在切面之间的夹角大于0°,小于等于30°。
  24. 根据权利要求21所述的电机,其中,
    所述支撑部具有朝向所述转轴开口的中空腔。
  25. 根据权利要求1至14中任一项所述的电机,其中,
    所述金属件包括端盖,所述端盖设在所述转子铁芯的轴向一侧,所述弹性导电件的至少一部分设在所述端盖与所述导电轴承之间。
  26. 根据权利要求25所述的电机,其中,
    所述导电轴承的内径为D1,所述导电轴承的内外圈电阻为R1;
    所述电机还包括:
    回转轴承,套设在所述转轴上,位于所述导电轴承背离所述端盖的一侧,所述回转轴承的内径为D2,所述回转轴承的内外圈电阻为R2,其中,D1<D2,R1<R2。
  27. 一种车辆,其中,包括:如权利要求1至26中任一项所述的电机。
  28. 一种电机,其中,包括:
    金属件,所述金属件接地;
    转子铁芯,设于所述金属件的一侧,所述转子铁芯包括轴孔;
    转轴,与所述转子铁芯相连,并穿设于所述轴孔内;
    导电轴承,套设于所述转轴;
    弹性导电件,所述弹性导电件位于所述导电轴承背离所述转子铁芯的轴向一侧,所述弹性导电件的至少一部分分别与所述导电轴承和所述金属件接触。
  29. 根据权利要求28所述的电机,其中,所述弹性导电件与所述金属件和所述导电轴承中至少一者之间具有缓冲空间。
  30. 根据权利要求29所述的电机,其中,所述弹性导电件包括:
    相连部;
    至少两个弹力部,分别与所述相连部相连,至少两个所述弹力部中每个弹力部相较于所述相连部至少沿轴向曲折延伸以形成所述缓冲空间。
  31. 根据权利要求30所述的电机,其中,至少两个所述弹力部均匀排布。
  32. 根据权利要求30所述的电机,其中,
    至少两个所述弹力部中一个弹力部朝向所述导电轴承凸出形成第一弹性凸部,所述第一弹性凸部与所述导电轴承接触,至少两个所述弹力部中另一个弹力部背离所述导电轴承凹陷形成第一弹性凹部,所述第一弹性凹部与所述金 属件接触。
  33. 根据权利要求32所述的电机,其中,
    所述第一弹性凸部的数量为至少两个,所述第一弹性凹部的数量为至少两个,至少两个所述第一弹性凸部中任一者位于至少两个所述第一弹性凹部中相邻的两个之间。
  34. 根据权利要求30所述的电机,其中,
    至少两个所述弹力部分别朝靠近所述导电轴承的方向凸出形成第二弹性凸部,至少两个所述第二弹性凸部分别与所述导电轴承接触,所述相连部与所述金属件接触。
  35. 根据权利要求30所述的电机,其中,
    至少两个所述弹力部分别朝远离所述导电轴承的方向凹陷形成第二弹性凹部,至少两个所述第二弹性凹部与所述金属件接触,所述相连部与所述导电轴承接触。
  36. 根据权利要求30所述的电机,其中,
    所述相连部为连接曲部,所述连接曲部的数量为至少两个,至少两个所述连接曲部中任一个连接曲部分别与至少两个弹力部中相邻两个弹力部相连。
  37. 根据权利要求35所述的电机,其中,所述相连部为连接环,至少两个所述第二弹性凸部设置在所述相连部的外周沿。
  38. 根据权利要求37所述的电机,其中,
    至少两个所述第二弹性凸部中每个第二弹性凸部的一部分沿着所述相连部的外周沿延伸以形成延伸段,至少两个所述第二弹性凸部中相邻两个第二弹性凸部的延伸段彼此靠近并连接。
  39. 根据权利要求29所述的电机,其中,所述弹性导电件具有多个缓冲腔。
  40. 根据权利要求39所述的电机,其中,
    所述弹性导电件包括多个沿轴向堆叠的弹片,多个所述弹片中每个弹片包括:
    第三弹性凸部,朝向所述导电轴承凸出;
    第三弹性凹部,与所述第三弹性凸部相连,并背离所述导电轴承凹陷;
    其中,多个所述弹片包括第一弹片和位于所述第一弹片背离所述导电轴承一侧的第二弹片,
    所述第一弹片的第三弹性凸部与所述第二弹片的第三弹性凹部之间具有多个所述缓冲腔中的一个,所述第一弹片的第三弹性凹部与所述第二弹片的第三弹性凸部相连。
  41. 根据权利要求30所述的电机,其中,所述相连部和所述弹力部的连接处圆角过渡。
  42. 根据权利要求28所述的电机,其中,所述弹性导电件与所述导电轴承的轴承外圈接触。
  43. 根据权利要求42所述的电机,其中,所述轴承外圈的一部分与所述 弹性导电件接触。
  44. 根据权利要求28所述的电机,其中,所述弹性导电件上设有避让口,所述转轴的一部分能够伸入所述避让口内。
  45. 根据权利要求44所述的电机,其中,所述避让口包括圆形开口。
  46. 根据权利要求28所述的电机,其中,所述弹性导电件为钣金件。
  47. 根据权利要求28至46中任一项所述的电机,其中,所述电机还包括:
    导电连接件,所述导电连接件与所述金属件相连,所述弹性导电件的至少部分位于所述导电连接件和所述导电轴承之间。
  48. 根据权利要求47所述的电机,其中,所述导电连接件包括:
    板体,所述板体与所述金属件相连;
    安装部,朝向所述转轴设在所述板体上,所述安装部包括安装位,所述弹性导电件和所述导电轴承的一部分分别设置在所述安装位处。
  49. 根据权利要求48所述的电机,其中,所述安装部包括:
    支撑部,设于所述板体上;
    抵接部,连接在所述支撑部的轴向端部,所述安装位设置在所述抵接部和所述支撑部之间;其中,所述导电轴承的轴承外圈与所述抵接部接触,所述弹性导电件设于所述抵接部、所述支撑部和所述导电轴承之间。
  50. 根据权利要求49所述的电机,其中,所述抵接部包括:
    抵接壁,朝向所述导电轴承;
    轴侧壁,背离所述支撑部;
    导向部,设于所述抵接壁与所述轴侧壁的连接处。
  51. 根据权利要求49所述的电机,其中,
    所述支撑部具有朝向所述转轴开口的中空腔。
  52. 根据权利要求28至46中任一项所述的电机,其中,
    所述金属件包括端盖,所述端盖设在所述转子铁芯的轴向一侧,所述弹性导电件的至少一部分设在所述端盖与所述导电轴承之间。
  53. 根据权利要求52所述的电机,其中,
    所述导电轴承的内径为D1,所述导电轴承的内外圈电阻为R1;
    所述电机还包括:
    回转轴承,套设在所述转轴上,位于所述导电轴承背离所述端盖的一侧,所述回转轴承的内径为D2,所述回转轴承的内外圈电阻为R2,其中,D1<D2,R1<R2。
  54. 一种车辆,其中,包括:如权利要求28至53中任一项所述的电机。
PCT/CN2021/117903 2021-07-01 2021-09-13 电机和车辆 WO2023272945A1 (zh)

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