CN111342608B - Motor, motor driving system, electric push rod and electric speed reducer - Google Patents
Motor, motor driving system, electric push rod and electric speed reducer Download PDFInfo
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- CN111342608B CN111342608B CN202010259514.4A CN202010259514A CN111342608B CN 111342608 B CN111342608 B CN 111342608B CN 202010259514 A CN202010259514 A CN 202010259514A CN 111342608 B CN111342608 B CN 111342608B
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- rotating shaft
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- shaft hole
- channeling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
- H02K7/1163—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion
- H02K7/1166—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion comprising worm and worm-wheel
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means 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
- H02K5/1737—Means 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 rotor around a fixed spindle; radially supporting the rotor directly
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
Abstract
The invention discloses a motor, a motor driving system, an electric push rod and an electric speed reducer, relates to the technical field of motor equipment, and aims to solve the problems of axial movement, noise, abrasion and low efficiency caused by a motor-driven worm gear structure, wherein the technical scheme is as follows: the method comprises the following steps: a housing having a front end shaft hole in which a bearing is provided; the rotor assembly comprises a rotating shaft and a coil arranged around the telescopic rotating shaft, and one end of the rotating shaft is rotatably connected to the front-end shaft hole through a bearing; a stator assembly including a permanent magnet surrounding the rotation shaft assembly; and the anti-channeling component is used for limiting the bidirectional axial movement of the rotating shaft. The invention provides a motor which is stable, low in noise, high in efficiency and suitable for a worm gear structure and a motor driving structure.
Description
Technical Field
The invention relates to the technical field of motor equipment, in particular to a motor, a motor driving system, an electric push rod and an electric speed reducer.
Background
With the high-speed development of the kitchen appliance industry, a large number of linear transmission telescopic devices are required to be used in various appliances of the kitchen appliances to realize the automatic operation of the kitchen appliances, and a worm gear speed reducing motor is used as a key structure in the appliances to directly influence the operation conditions of the appliances. However, the worm gear speed reducing motor applied in the field of kitchen appliances generally has the condition of easy blocking, so that the kitchen appliances cannot stably and reliably run, and the phenomenon is particularly common in application occasions such as range hoods, integrated cookers and the like, and is expressed in that a flip cover or a lifting glass cannot be opened or closed.
The main reason is that in the running process of the worm and gear speed reducing motor, the motor is electrified to run, the rotor and the stator interact to drive the rotating shaft to rotate, and the rotating shaft drives the worm and gear mechanism to run, so that the actuating mechanism of the equipment is driven to run. In the running process of the worm gear mechanism, the rotating shaft is subjected to axial pushing and pulling forces, so that the rotating shaft is easy to generate certain axial movement; when the rotating shaft is subjected to outward pulling force, the end surface of the shaft sleeve on the rotating shaft is tightly attached to the inner abutting structure of the motor, the friction between surfaces exists in the motor, so that a large friction force is generated, the motor needs to overcome the friction force to perform extra work, energy consumption waste is caused, the inner part of the motor is easy to wear, and the precision of the motor is influenced; and after the motor is stopped at the position, in the process of restarting the motor, the motor needs to overcome larger static friction force between surfaces and self starting resistance moment, so that the situation that the motor can not be started due to overlarge resistance force can occur, and the normal operation of kitchen electrical equipment is influenced.
Disclosure of Invention
The invention aims to provide a motor, a motor driving system, an electric push rod and an electric speed reducer which are stable, low in noise, high in efficiency and suitable for a worm gear structure.
The invention relates to an electric machine comprising: the bearing device comprises a shell, a bearing seat and a bearing seat, wherein the shell is provided with a front-end shaft hole; the rotor assembly comprises a rotating shaft and a coil arranged around the rotating shaft, and one end of the rotating shaft is rotatably connected to the front-end shaft hole through a first bearing; a stator assembly including a permanent magnet surrounding the rotating shaft assembly; and the anti-channeling component is used for limiting the bidirectional axial movement of the rotating shaft.
In an alternative embodiment of the motor, the anti-channeling assembly includes an inner anti-channeling member and an outer anti-channeling member connected to the rotating shaft, the inner anti-channeling member and the outer anti-channeling member are respectively disposed at inner and outer sides of the housing, and at least one of the outer anti-channeling member and the inner anti-channeling member abuts against an inner ring of the first bearing when the rotating shaft moves axially.
In an alternative embodiment of the electric machine, the distance between the inner and outer tamper-resistant members is slightly larger than the thickness of the inner ring.
In an alternative embodiment of the motor, the housing further has a rear shaft hole, a shaft sleeve is disposed in the rear shaft hole, and the other end of the rotating shaft is rotatably connected to the rear shaft hole through the shaft sleeve.
In an alternative embodiment of the motor, the sleeve is axially oscillatable.
In an alternative embodiment of the motor, the outer circumferential surface of the shaft sleeve is a spherical structure, and the inner circumferential surface of the rear end shaft hole and the outer circumferential surface of the shaft sleeve form a spherical connection structure.
In an alternative embodiment of the motor, a fixing member is disposed at one side of the rear end shaft hole, and the fixing member is used for pressing the outer peripheral surface of the shaft sleeve against the inner peripheral surface of the rear end shaft hole.
In an alternative embodiment of the motor, the fixing pieces are a plurality of fixing pieces with elasticity, and the fixing pieces are distributed outside the rear end shaft hole in an annular array.
In an optional embodiment of the motor, the shaft sleeve is provided with a butting surface, and the butting position of the rotating shaft and the butting surface is located on the axis.
In an optional embodiment of the motor, an oil stopping member is arranged at a position of the rotating shaft close to the shaft sleeve, and the maximum distance of the movement of the rotating shaft to the rear end shaft hole is not greater than the distance between the oil stopping member and the shaft sleeve.
In an optional embodiment of the motor, the inner anti-channeling piece and the outer anti-channeling piece are respectively detachably connected with the rotating shaft, and the outer anti-channeling piece is one or more of a snap spring, a limiting pin or a limiting ring.
The invention relates to a motor driving system, which comprises the motor and a worm and gear assembly, wherein the worm and gear assembly comprises a worm wheel and a worm which are meshed with each other, and the worm is connected to a rotating shaft and used for driving the worm wheel to rotate.
The invention relates to an electric push rod which comprises the motor driving system, and further comprises an inner tube, an outer tube and a screw rod assembly, wherein the inner tube and the outer tube are connected through the screw rod assembly to form a telescopic structure, the screw rod assembly comprises a screw rod and a nut which are matched, the screw rod is coaxially connected to a worm wheel, the nut is fixedly connected to the inner tube, and continuous internal threads are formed in the nut and the outer tube.
The invention relates to an electric speed reducer which comprises the motor driving system and a gear transmission assembly, wherein the input end of the gear transmission assembly is connected with a worm wheel.
Has the advantages that: in conclusion, the anti-channeling component and the ball bearing are matched with each other to position the position relation among the rotor component, the stator component and the shell, so that the axial load borne by the rotating shaft can be borne, the axial displacement of the rotating shaft in the rotating process is limited, and the friction loss between the rotating shaft and the shell is eliminated. The kitchen electrical equipment has the advantages that excellent motor performance is realized, so that higher stability can be kept by using the kitchen electrical equipment, loss is reduced, running noise and vibration are reduced, and the quality of the kitchen electrical equipment is improved.
Drawings
Fig. 1 is an external structural view of an electric putter according to an embodiment of the present invention;
FIG. 2 is a schematic view of a disassembled structure of an electric putter according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a motor and a motor driving system according to the present invention;
FIG. 4 is an enlarged view of portion A of FIG. 3;
FIG. 5 is an enlarged view of portion B of FIG. 3;
FIG. 6 is a schematic structural diagram of a rear end of a rotating shaft of an electric putter according to another embodiment of the present invention;
fig. 7 is a schematic structural view of the stop collar of the present invention.
In the figure: 1. a housing; 2. a rotor assembly; 3. a rotating shaft; 4. a stator assembly; 5. a front end shaft hole; 6. a first bearing; 7. a tamper-resistant assembly; 8. a limiting component; 9. an end cap; 10. a shaft sleeve; 11. a worm; 12. a worm gear; 13. a mounting seat; 14. an outer tube; 15. a screw rod; 16. a second bearing; 17. an inner tube; 18. a nut; 19. a limiting block; 20. a slider; 21. a slideway; 22. a limiting groove; 23. sealing the end; 24. a joint; 25. a clamp spring; 501. a limiting bulge; 601. an outer ring; 602. an inner ring; 701. an inner anti-channeling member; 702. an outer anti-channeling member; 801. a limiting ring; 802. a limiting sheet; 803. a first check ring; 804. a second check ring; 805. a third check ring; 901. a rear end shaft bore; 101. and (7) pressing the surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar language throughout the specification is not intended to imply any order, quantity, or importance, but rather the intention is to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one.
The first embodiment is as follows: the embodiment of the invention discloses a motor, as shown in figures 1-7, which is particularly suitable for kitchen appliances, and the motor drives a worm 11 and a worm wheel 12 to run, so as to realize component driving in the kitchen appliances.
Specifically, the motor comprises a shell 1 with a front shaft hole 5 and a rear shaft hole 901, wherein a rotor assembly 2 and a stator assembly 4 are arranged inside the structure of the shell 1; the rotor assembly 2 is a rotating shaft 3 surrounding the coil, two ends of the rotating shaft 3 are respectively supported by a front end shaft hole 5 and a rear end shaft hole 901 to realize rotation, and the stator assembly 4 is a permanent magnet arranged on the inner wall of the shell 1, and the permanent magnet surrounds the outer side of the rotor coil and is matched with the rotor coil; in order to increase the stability of the rotating shaft 3 in the operation process, a bearing I6 is arranged between the front-end shaft hole 5 and the rotating shaft 3 for rotary support, so that the stability of the rotating shaft 3 in operation is increased and decreased; the motor is also provided with a channeling-preventing component 7, wherein the channeling-preventing component 7 is installed on the rotating shaft 3, and when the rotating shaft 3 is impacted by axial load, the channeling-preventing component 7 can bear and absorb the axial force on the rotating shaft 3.
This prevent scurrying subassembly 7 and rotor subassembly 2, stator module 4 can play the axial load that counter shaft 3 received with the cooperation of casing 1 and bear to the axial displacement of restriction pivot 3 rotation in-process eliminates the friction loss of pivot 3 with casing 1, realizes excellent motor performance, makes and uses this kitchen electrical equipment all to keep higher stable level, reduces the loss, reduces the noise and the vibration of operation, promotes kitchen electrical apparatus's quality.
According to the operating parameters and the using environment of the motor, the bearing-I6 is a ball bearing, the ball bearing is provided with an outer ring 601, an inner ring 602 and rolling bodies between the outer ring 601 and the inner ring 602, in order to mount and fix the bearing-I6, the inner side part of the shell 1 corresponding to the front end shaft hole 5 is protruded to form a limiting bulge 501, a containing space of the bearing-I6 is formed on the limiting bulge 501 and the inner wall of the front end shaft hole 5, the outer ring 601 of the bearing-I6 can be mounted in the containing space, and the limiting bulge 501 can position and limit the position of the bearing-I6.
Specifically, the limiting protrusion 501 is an axial annular structure, and the protruding height of the limiting protrusion 501 is smaller than the radial thickness of the outer ring 601 of the bearing one 6, when the bearing is assembled, the outer ring 601 abuts against the limiting protrusion 501, the inner ring 602 can freely rotate under the support of the rotating body, and the rotating shaft 3 passes through the inner ring 602 of the bearing one 6 for installation; at this time, the rotating shaft 3 can freely rotate relative to the housing 1 under the support of the bearing I6 and is supported by the rolling bodies between the inner ring 602 and the outer ring 601, so that the rotational wear between the rotating shaft 3 and the housing 1 is reduced, and the running stability of the rotating shaft 3 is improved.
The anti-channeling component 7 comprises an inner anti-channeling component 701 arranged on the inner side of the shell 1, the inner anti-channeling component 701 can be of a sheet structure and is arranged between the coils of the rotor component 2 and the first rotor component 6, and when the rotating shaft 3 is loaded with force from the rear end to the front end, the inner anti-channeling component 701 can transmit the components of the rotating shaft 3 to the shell 1.
Specifically, the inner anti-channeling member 701 is a sheet-shaped ring, which is fixedly sleeved on the rotating shaft 3 and is located at the outer side of the coil; the size of the inner anti-channeling piece 701 has specific requirements, and the outer diameter of the inner anti-channeling piece is not larger than the inner diameter of the outer ring 601; when the motor is used, when the motor is loaded with force from the rear end to the front end, the inner anti-channeling piece 701 is small in size and abuts against the inner ring 602 of the bearing I6, can rotate synchronously along with the inner ring 602 of the bearing I6 and does not directly contact with the outer ring 601 of the bearing I6 and the shell 1, abrasion of the rotor assembly 2 in the process of sliding along the front end is eliminated, and noise and loss in the rotating process of the motor are reduced.
Because the motor drives the worm gear structure to have two kinds of running conditions, namely the positive rotation is overturned, the motor will be respectively subjected to different loads in two directions in different steering processes, and the structure of the inner anti-fleeing piece 701 only solves the axial load when the rotating shaft 3 carries the load from the rear end to the front end; therefore, the anti-tamper assembly 7 further includes an outer anti-tamper 702, the outer anti-tamper 702 is disposed outside the housing 1 and is fixedly mounted to the rotating shaft 3, and when the rotating shaft 3 receives an axial load from the front end to the rear end, the outer anti-tamper 702 can transmit the axial load received by the rotating shaft 3 to the housing 1 for absorption.
Specifically, the outer anti-channeling member 702 may be fixedly installed on the rotating shaft 3, and when the rotating shaft 3 is subjected to a load force from the front end to the rear end, the outer anti-channeling member 702 is pressed against the inner ring 602 and does not contact the outer ring 601 of the peripheral bearing-one 6, the limiting protrusion 501 or the housing 1, and in this working state, the rotor assembly 2 can still rotate along with the inner ring 602 and does not directly wear the outer ring 601, the limiting protrusion 501 or the housing 1.
During assembly, in order to increase the stability of the motor after the motor is subjected to an axial load, the inner anti-moving part 701 and the outer anti-moving part 702 are respectively pressed against the inner ring 602 of the bearing I6 from the inner direction and the outer direction, so that the moving of the rotating shaft 3 after the axial load is applied can be eliminated, and the noise generated by impact is reduced; in order to improve the abutting tightness between the inner anti-channeling part 701, the outer anti-channeling part 702 and the inner ring 602, an elastic structure can be adopted among abutting surfaces of the inner anti-channeling part, and in a natural state that the motor does not operate, the elastic structure is in a state of larger elastic compression deformation, so that the buffering stability of load absorption and buffering can be improved through the buffering absorption of the elastic structure; the elastic structure may be an elastic sheet having moderate elasticity or an elastic coating directly coated or bonded to the surfaces of the inner anti-tamper member 701, the outer anti-tamper member 702, and the inner race 602.
The specific structure of the outer anti-channeling member 702 can be selected from various structures, such as a ring which is assembled on the rotating shaft 3 in an interference manner, a nut 18 which is connected to the rotating shaft 3 in a threaded manner, or different structures such as a snap spring 25 and a pin shaft, and the functional effect of the outer anti-channeling member 702 can be achieved.
The housing 1 of the motor is an open body and a closed end cover 9, the end cover 9 is located at the rear end position of the motor, and the rear shaft hole 901 is arranged on the end cover 9. A shaft sleeve 10 is further arranged at the position of the rear-end shaft hole 901, so that the action of the rotating shaft 3 is further stabilized, and the friction loss and the noise between the rotating shaft 3 and the rear-end shaft hole 901 are reduced.
The contact surface between the rear end shaft hole 901 and the shaft sleeve 10 can be a spherical structure, the shaft sleeve 10 can realize spherical swing in the rear end shaft hole 901, when the rotating shaft 3 is swung and deflected in the radial direction, the shaft sleeve 10 can swing and deflect along the inner side of the rear end shaft hole 901, and at the moment, the shaft sleeve 10 still keeps a coaxial state with the rotating shaft 3, so that abrasion caused by axial line deviation of the shaft sleeve 10 and the rotating shaft 3 can be reduced, and noise caused by friction is reduced.
Specifically, rear end shaft hole 901 is open structure, axle sleeve 10 is through 8 spacing installations in the inside of rear end shaft hole 901 of spacing subassembly, and form sphere pivoted structure, spacing subassembly 8 includes spacing ring 801 and a plurality of spacing piece 802, spacing piece 802 circumference permutation distributes in the inboard of spacing ring 801, during the assembly, spacing ring 801 is installed in the outside of rear end shaft hole 901 through joint or other fixed connection's mode, each spacing piece 802 is even elasticity respectively and is supported and is pressed in axle sleeve 10 this moment, and through the cambered surface in the axle sleeve 10 outside, spacing piece 802 and axle sleeve 10 outside arc adaptation, support axle sleeve 10 and press and present to be located the shaft end shaft hole. A first check ring 803, a second check ring 804 and a third check ring 805 are arranged between the shaft sleeve 10 and the shaft shoulder of the rotating shaft 3 in a pressing mode, and sliding guide and insulation processing can be conducted.
When the load of the radial deflection of the rotating shaft 3 is large, the shaft sleeve 10 can generate partial deflection under the limiting of the limiting sheet 802, and after the load is eliminated, the shaft sleeve 10 can elastically restore to the original shape, and the shaft sleeve 10 still keeps the coaxial state with the rotating shaft 3 after the deflection, so that the stable operation of the motor can be maintained.
On the basis of adopting the inner anti-channeling piece 701, another scheme can be adopted to replace the effect of the outer anti-channeling piece 702, the anti-channeling end cover 9 is arranged outside the rear end shaft hole 901 of the shell 1, the anti-channeling end cover 9 is pressed against the end surface of the rotating shaft 3, and during assembly, in order to reduce friction generated by rotation between the end cover 9 and the end surface of the rotating shaft 3, the contact area between the rear end surface of the rotating shaft 3 and the end cover 9 can be reduced, and the contact position of the contact position is ensured to be positioned on the axial line of the rotating shaft 3; specifically, the end surfaces of the end cover 9 and the rotating shaft 3 can be both spherical structures, the spherical positions of the spherical surfaces are all located on the axis, the rotating shaft 3 and the end cover 9 are in contact with each other through two spherical surfaces, the contact area is only a point, the friction loss between the rotating shaft 3 and the anti-channeling end cover 9 can be reduced, and the noise in the rotating process of the motor during operation is reduced.
Example two: the embodiment of the invention also discloses another motor, the specific structure of which is basically consistent with that in the above embodiment, wherein the difference is that the structure of the motor in the aspect of external anti-channeling is different from that in the above embodiment, specifically, in the embodiment, the shaft sleeve 10 is set to be a semi-closed structure, and the external anti-channeling member 702 can be cancelled according to the use situation, the end part of the inner hole of the shaft sleeve 10 is provided with the abutting surface 101, the abutting surface 101 can support the axial load of the rotating shaft 3, and the abutting position of the rotating shaft 3 and the abutting surface 101 is located on the axis, so that the friction between the rotating shaft 3 and the abutting surface 101 in the rotating process can be reduced, and the noise and the abrasion of the motor can be reduced; or the outer anti-channeling piece 702 is arranged at the same time, double supporting effect can be achieved, the gap between the abutting surface 101 and the end surface of the rotating shaft 3 is slightly smaller than the gap between the outer anti-channeling piece 702 and the inner ring 602, when in use, the rotating shaft 3 can be supported through point contact between the end surface of the rotating shaft 3 and the abutting surface 101, the load of the inner ring 602 can be reduced while the supporting is realized, and when the axial load on the rotating shaft 3 is increased, so that the elastic deformation between the end surface of the rotating shaft 3 and the abutting surface 101 is increased, the rotating shaft 3 slightly moves backwards, and at the moment, the outer anti-channeling part 702 can abut against the end surface of the inner ring 602 to share the load, thereby realizing stable bearing support, because the rotating shaft 3 and the abutting surface 101 are made of hard metal materials, the elastic deformation amount is very small, the axial movement of the shaft 3 is very slight relative to the overall play of the shaft 3, and cannot be ignored in the actual use process.
In addition, after the motor is used for a long time, the end surface of the rotating shaft 3 is continuously contacted with the abutting surface 101 in an abutting mode to generate certain abrasion, so that the gap between the abutting position between the abutting surface 101 and the end surface of the rotating shaft 3 is increased, the normal gap of the abutting position is gradually enlarged in the abrasion process, and the supporting functions of the abutting position and the supporting position are matched with each other. The load pressed by the outer anti-channeling piece 702 and the inner ring 602 can be set as a critical load, the value of the critical load is reduced along with the abrasion of the abutting surface 101 and the end surface of the rotating shaft 3, the outer anti-channeling piece 702 and the inner ring 602 are supported earlier, so that the maximum load independently borne between the abutting surface 101 and the end surface of the rotating shaft 3 is reduced gradually, the abrasion speed between the abutting surface 101 and the end surface of the rotating shaft 3 is reduced gradually until the gap between the abutting surface 101 and the end surface of the rotating shaft 3 and the gap between the outer anti-channeling piece 702 and the inner ring 602 are close to each other, and therefore, the outer anti-channeling piece 702 and the inner ring are matched with each other, so that stable axial support can be achieved, the loads can be dispersedly supported, and the abrasion of components in the motor can be reduced.
In a specific structure, the end surface or the abutting surface 101 of the rotating shaft 3 can be arranged into a convex spherical surface, and the spherical center of the spherical surface is positioned on the axis of the rotating shaft 3, so that when the two are abutted against each other, the abutting position can be just positioned on the axis of the rotating shaft 3, and the point supporting effect can be achieved, thereby replacing the mode of supporting the shaft shoulder surface of the rotating shaft 3 in the prior art, and reducing the abrasion and the noise; compared with the above embodiment, in this embodiment, when the rotating shaft 3 and the abutting surface 101 are supported in an abutting manner, the inner ring 602 of the ball bearing does not need to be axially supported, so that the load of the bearing-6 can be reduced, and the service life of the bearing-6 can be prolonged.
Example three: an embodiment of the present invention discloses a motor driving system, as shown in fig. 3, having the motor in the above embodiment.
The motor driving system also comprises a worm gear assembly, the worm gear assembly consists of a worm wheel 12 and a worm 11 which are meshed with each other, the worm 11 is arranged on the rotating shaft 3, the worm wheel 12 can stably rotate through shaft support, and the rotation of the worm 11 is driven by the motor and then transmitted to the rotation of the worm wheel 12 to realize the output of power; on one hand, the worm and gear assembly can realize the speed reduction of rotation and convert the rotation into larger output torque; on the other hand, the motor can support the axial force of the worm 11 in the operation process, reduce the axial movement of the worm 11 and the rotating shaft 3, reduce the abrasion and noise caused by the axial movement, and increase the stability of the whole motor driving system.
Example four: the embodiment of the invention also discloses an electric push rod, which is particularly suitable for kitchen appliances as shown in figures 1 and 2, and the electric push rod can stretch and retract to push a mechanism in the kitchen appliances to perform displacement action.
The electric push rod is provided with the motor driving system in the embodiment and additionally comprises an inner tube 17, an outer tube 14, a screw rod 15 and a proper supporting component, wherein the inner tube 17 and the outer tube 14 are mutually sleeved to form a reciprocating sliding structure, and are connected through the screw rod 15 component to form a telescopic structure.
The screw rod 15 is rotatably connected to the outer pipe 14 through a second bearing 16, an outer ring 601 of the second bearing 16 is fixed in the outer pipe 14 through a clamp spring 25, an inner ring 602 of the second bearing 16 is fixed at the position without threads on the end part of the screw rod 15, the inner ring and the outer ring are tightly matched with each other and are positioned through a shaft shoulder; the nut 18 is then fixedly connected to the inner tube 17. The nut 18 is coaxial with the inner tube 17 and fixed at the end of the inner tube 17, and can be fixed by integral injection molding or other modes, the nut 18 can be made of plastic materials, and the inner tube 17 is made of metal materials; the nut 18 is in threaded connection with the screw rod 15, the inner tube 17 is of a hollow structure, the screw rod 15, the inner tube 17 and the outer tube 14 are in a mutually sleeved structure, and telescopic sliding can be achieved in the threaded rotation process of the screw rod 15 and the nut 18. In order to increase the strength of the nut 18, the material of the nut 18 may also be a metal material, or a combination of metal and plastic.
In order to ensure the reliability of reciprocating expansion and contraction, a guide part needs to be arranged between the inner pipe 17 and the outer pipe 14, the inner pipe 17 and the nut 18 are prevented from rotating along with the screw rod 15, the structure of the guide part can be various, and the axial sliding guide of the inner pipe 17 and the outer pipe 14 can be realized.
In this embodiment, the guide member is a stopper 19 and a slider 20 integrally connected to the outer periphery of the nut 18.
Specifically, the inner diameter of the outer tube 14 is larger than the outer diameter of the inner tube 17, a certain gap exists between the inner diameter and the outer diameter, an axial limiting groove 22 is formed in the inner wall of the outer tube 14, and a limiting block 19 on the nut 18 can be just matched in the limiting groove 22 in a sliding manner, so that axial sliding guiding is realized; the slider 20 is evenly distributed on the periphery wall of nut 18 then, has the curved surface with outer tube 14 inner slide 21 looks adaptation, and including outer tube 14 flexible in-process, the outer wall of nut 18 can laminate all the time on the inner wall of outer tube 14, can increase sliding stability's effect.
The end socket 23 is arranged at the end part of the outer pipe 14, the inner pipe 17 and the outer pipe 14 are sealed, an inner hole in the end socket 23 can be just used for the inner pipe 17 to pass through, the two ends of the inner pipe 17 can be supported by the nut 18 and the end socket 23 to realize radial stable support, and the problem that the inner pipe 17 swings in the lifting process is solved.
The outer tube 14 and the motor are jointly installed on the installation base 13, the installation base 13 has a hollow structure, the output end of the motor rotating shaft 3 extends into the rotating shaft 3, and the worm 11 is installed; the end of the screw rod 15 in the outer tube 14 also extends into the mounting seat 13 and is provided with the worm wheel 12. At this time, the screw rod 15 is perpendicular to the motor shaft 3, and the worm wheel 12 and the worm 11 are also matched with each other, so that the rotation output by the motor can be transmitted to the screw rod 15, and the inner tube 17 is driven to extend and retract.
When in specific use, the electric push rod can be used in kitchen electrical equipment, such as: the movement of the middle parts of the integrated stove and the range hood; appropriate joints 24 are installed at the movable ends of the mounting base 13 and the inner tube 17, and the two joints 24 are respectively installed at appropriate positions to realize the reciprocating movement of the components.
Example five: the embodiment of the invention discloses an electric speed reducer, which is particularly suitable for kitchen appliances, and the electric speed reducer drives a component mechanism in the kitchen appliances to move so as to realize the control of electrical equipment.
The electric speed reducer is provided with the motor driving system in the embodiment, and is also provided with a gear transmission assembly and a gear box, wherein the gear transmission assembly comprises five gears which are in mutual meshing transmission, and the gears are arranged in the gears and are in mutual meshing transmission; meanwhile, the worm gear assembly is also arranged in the gear box, wherein the worm gear 12 is coaxially arranged with an input gear in the gear transmission assembly and synchronously rotates; a rotating shaft 3 of the motor extends into the gear box, and a worm 11 is arranged on the rotating shaft 3 and used for transmitting the rotation input by the motor.
In the transmission process, the motor drives the worm and gear assembly through the rotating shaft 3, the torque is transmitted to the worm and gear assembly through the worm wheel 12 to further reduce the speed, the torque is output from the output end of the worm and gear assembly, the speed reduction is realized, and the torque is converted into a larger output torque.
The embodiment of the invention also discloses another electric speed reducer, which has a structure similar to that of the electric speed reducer in the embodiment, wherein the difference is that in order to increase the flexible adaptability of the speed reducer, the worm 11 has a double-thread structure, the double-thread structure comprises two groups of same single threads, and the thread pitch is equal to that of the embodiment; the lead of the thread line in the embodiment is increased, the transmission proportion of the worm and gear assembly is reduced, the self-locking effect of the worm and gear assembly is reduced, and when the motor rotates to stop rotating, the external applied force can drive the motor shaft to rotate.
For example, when the electric speed reducer of the present embodiment is applied to a component lifting component of an integrated cooker, once a power failure occurs during use, the motor cannot be used, and a movable component in the electric appliance cannot be reset, and at this time, manual operation can be performed through external force to restore the movable component to the original position.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (5)
1. An electric machine, comprising:
the bearing comprises a shell (1) and a bearing body, wherein the shell is provided with a front end shaft hole (5), and a first bearing (6) is arranged in the front end shaft hole (5); an end cover (9) is arranged at the rear end of the shell (1), a rear end shaft hole (901) is formed in the end cover (9), a shaft sleeve (10) is arranged in the rear end shaft hole (901), the shaft sleeve (10) can axially swing, the outer peripheral surface of the shaft sleeve (10) is of a spherical structure, the other end of the rotating shaft (3) is rotatably connected to the rear end shaft hole (901) through the shaft sleeve (10), the rear end shaft hole (901) is of an open structure, the shaft sleeve (10) is in limiting installation in the rear end shaft hole (901) through a limiting assembly (8) and forms a spherical rotating structure, the limiting assembly (8) comprises a limiting ring (801) and a plurality of limiting pieces (802), the limiting pieces (802) are circumferentially distributed on the inner side of the limiting ring (801) in an aligned manner, the limiting ring (801) is installed on the outer side of the rear end shaft hole (901), and a first check ring (803) and a second check ring (803) are arranged between the shaft shoulder of the rotating shaft (3) in a pressing manner, A second retaining ring (804) and a third retaining ring (805);
the rotor assembly (2) comprises a rotating shaft (3) and a coil arranged around the rotating shaft (3), and one end of the rotating shaft (3) is rotatably connected to the front-end shaft hole (5) through a bearing I (6);
a stator assembly (4) comprising a permanent magnet surrounding the rotor assembly (2);
a play prevention unit (7) for restricting axial movement of the rotary shaft (3) in both directions; the anti-channeling component (7) comprises an inner anti-channeling piece (701) and an outer anti-channeling piece (702) which are connected to the rotating shaft (3), the inner anti-channeling piece (701) and the outer anti-channeling piece (702) are respectively arranged on the inner side and the outer side of the shell (1), and when the rotating shaft (3) moves axially, at least one of the outer anti-channeling piece (702) and the inner anti-channeling piece (701) abuts against the inner ring (602) of the bearing I (6);
a fixing piece is arranged on one side of the rear-end shaft hole (901), and is used for pressing the outer peripheral surface of the shaft sleeve (10) against the inner peripheral surface of the rear-end shaft hole (901); the fixing pieces are a plurality of elastic fixing pieces which are distributed outside the rear end shaft hole (901) in an annular array;
the surfaces of the inner anti-channeling piece (701), the outer anti-channeling piece (702) and the inner ring (602) of the first bearing (6) are provided with elastic coatings.
2. An electric machine according to claim 1, characterized in that the rotating shaft (3) is provided with an oil stop member at a position close to the bushing (10), and the maximum distance of the rotating shaft (3) moving towards the rear end shaft hole (901) is not greater than the distance between the oil stop member and the bushing (10).
3. A motor drive system, comprising the motor of any one of claims 1-2, and further comprising a worm gear assembly including a worm wheel (12) and a worm (11) engaged with each other, wherein the worm (11) is connected to the shaft (3) for driving the worm wheel (12) to rotate.
4. An electric push rod, comprising the motor driving system of claim 3, characterized by further comprising an inner tube (17), an outer tube (14) and a screw rod assembly, wherein the inner tube (17) and the outer tube (14) are connected through the screw rod (15) assembly to form a telescopic structure, the screw rod assembly comprises a screw rod (15) and a nut (18) which are matched, the screw rod (15) is coaxially connected to the worm wheel (12), the nut (18) is fixedly connected to the inner tube (17), and the nut (18) and the outer tube (14) are provided with continuous internal threads.
5. An electric speed reducer comprising the motor drive system of claim 3, further comprising a gear assembly, an input of the gear assembly being connected to the worm gear (12).
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| CN202010259514.4A CN111342608B (en) | 2020-04-03 | 2020-04-03 | Motor, motor driving system, electric push rod and electric speed reducer |
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| CN112127736A (en) * | 2020-09-24 | 2020-12-25 | 浙江龙纪汽车零部件股份有限公司 | Horizontal electric tail door stay bar for car |
| WO2023016362A1 (en) * | 2021-08-10 | 2023-02-16 | 锐迈科技股份有限公司 | Motor driving structure and motor driving device |
| CN113824245A (en) * | 2021-09-22 | 2021-12-21 | 浙江美茵电机有限公司 | Bilateral clamping type motor self-locking mechanism and self-locking motor |
| CN114033832B (en) * | 2021-11-05 | 2023-03-28 | 兰州理工大学 | Two-dimensional integrated semi-active vibration control device based on impact vibration reduction |
| CN115632516B (en) * | 2022-12-01 | 2023-04-21 | 普达迪泰(成都)智造研究院有限公司 | High-precision servo linear driving device |
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