CN216904448U - Parking motor and parking system - Google Patents

Abstract

The utility model discloses a parking motor and a parking system, comprising: a stator structure and a rotor structure which are used together; wherein the stator structure comprises a stator core; the stator core comprises a plurality of stator teeth and a plurality of stator slots, and the plurality of stator teeth and the plurality of stator slots are arranged in a ring shape at intervals; the rotor structure comprises a rotor shaft and a magnetic ring arranged on the rotor shaft; each stator tooth comprises a stator tooth neck and a stator pole shoe which are integrally formed; wherein the width L1 of the slot opening of each stator slot is between the maximum radial plane L2 of the stator pole piece and the width L3 of the maximum radial plane of the stator pole piece. The utility model can improve the cogging torque of the motor and realize the self-locking function of the parking system.

Description

Parking motor and parking system

Technical Field

The utility model relates to the technical field of motors, in particular to a parking motor and a parking system.

Background

In order to transmit torque and rotation speed to a gear system on an automobile gearbox, a parking motor is fixedly installed in a motor chamber formed on the gearbox or the gearbox and used for engaging and disengaging a parking pawl on the gearbox. The parking motor used in the parking system is generally a dc brushless motor or a dc brush motor. The brushless DC motor has the advantages of small size, high efficiency, long service life, stable structure and the like, and can gradually replace a brush DC motor to be applied to a parking system.

Practical research shows that the dc brushless motor adopted in the parking system which is used more in the prior art has the following disadvantages:

(1) general brushless DC motor rotates the in-process atress evenly in order to guarantee magnet in the stator, can increase the contact surface of stator pole shoe and magnet as far as possible, and the stator notch is narrower, makes the tooth's socket torque less, need set up extra transmission system self-lock device in parking system, realizes parking system's self-locking function, prevents to appear swift current car phenomenon, and its structure is loaded down with trivial details, and the cost is higher.

(2) The bottom of the motor is in direct contact with the inner wall of the motor chamber in the parking system, and the vibration between the bottom of the motor and the motor chamber is large in the rotating process of the motor, so that great noise exists in the rotating process of the motor.

SUMMERY OF THE UTILITY MODEL

A first object of the present invention is to provide a parking motor to solve the problem of improving a cogging torque of the parking motor.

A second object of the present invention is to provide a parking system to solve the problem of implementing a self-locking function of the parking system.

The parking motor of the utility model is realized by the following steps:

a parking motor comprising: a stator structure and a rotor structure which are used together; wherein

The stator structure comprises a stator core; the stator core comprises a plurality of stator teeth and a plurality of stator slots, and the plurality of stator teeth and the plurality of stator slots are arranged in a ring shape at intervals;

the rotor structure comprises a rotor shaft and a magnetic ring arranged on the rotor shaft; and

each stator tooth comprises a stator tooth neck and a stator pole shoe which are integrally formed; wherein

The width L1 of the slot opening of each stator slot is between the width L2 of the inner end surface of the stator pole shoe facing the magnetic ring and the width L3 of the maximum radial surface of the stator pole shoe.

In an alternative embodiment of the present invention, L1 ═ (L2+ L3)/2.

In an alternative embodiment of the present invention, the size of the air gap formed between the rotor structure and the stator structure in the radial direction of the parking motor is 0.3mm to 0.4 mm.

In an optional embodiment of the utility model, the magnetic ring is magnetized by adopting square waves; and

two end parts of the magnetic rings along the axial direction of the rotor shaft are protruded from two end parts of the stator core along the axial direction of the rotor shaft one to one.

In an alternative embodiment of the present invention, two ends of the magnetic ring in the axial direction of the rotor shaft are respectively protruded by the same height as two ends of the stator core in the axial direction of the rotor shaft.

In an optional embodiment of the utility model, the stator structure further comprises an insulating framework arranged at the axial end of the stator core and a terminal formed on the insulating framework; wherein

The terminal comprises a hanging wire part, an embedded injection part and an external connection part which are integrally formed;

a wire groove for hanging the enameled wire and a wire hanging port communicated with the wire groove are formed in the wire hanging part;

the embedded injection part is used for injection molding on the insulating framework;

the external connection part is used for connecting an external terminal.

The parking system of the utility model is realized by the following steps:

a parking system, comprising: the parking motor and a motor chamber matched with the parking motor; wherein

The parking motor further comprises a machine shell which is arranged on the outer side of the stator structure and is used for being matched and connected with the motor chamber.

In an optional embodiment of the utility model, a shockproof elastic cushion is further arranged between one side end of the casing, which is far away from the output end of the rotor shaft, and the motor chamber;

the shockproof elastic pad is used for forming elastic fit between the shell and the motor chamber; and

the shockproof elastic pad comprises a fixing part matched with the shell in a matching mode and at least one elastic sheet which is integrally connected with the fixing part and is used for being abutted and matched with the inner wall of the motor chamber.

In an alternative embodiment of the present invention, the fixing portion is coupled to the housing by a screw or a rivet.

In an alternative embodiment of the present invention, the fixing portion is coupled to the housing through a self-locking assembly; and

the self-locking assembly comprises an annular groove arranged on the outer wall of the bearing chamber of the shell and a plurality of elastic clamping pieces which are arranged on the fixing part and surround to form an annular structure;

a plurality of the elastic clamping pieces are suitable for being clamped and embedded in the annular groove.

By adopting the technical scheme, the utility model has the following beneficial effects: according to the parking motor and the parking system, the magnetic conductivity of the notch is reduced by increasing the width of the notch of the stator slot, so that the integral magnetic leakage of the parking motor is reduced, the tooth space torque of the parking motor is increased, and the self-locking capability of the parking system is improved.

In addition, for the motor, the demagnetization resistance is mainly on the air gap, and if the air gap is too large, the magnetic resistance is increased, the excitation loss is large, and the excitation current is increased, so that the overall power of the motor is reduced. The air gap formed between the rotor structure and the stator structure along the radial direction of the parking motor is 0.3-0.4 mm, the smaller air gap design reduces the loss of exciting current, the power consumption of the whole parking motor can be obviously reduced under the condition of the same output power, and meanwhile, the whole power of the parking motor is improved.

In addition, the shockproof elastic pad is additionally arranged at the contact part of the bottom of the shell of the parking motor and the motor chamber of the parking system, and the shockproof elastic pad is fixed on the shell of the parking motor and provides axial elastic force for the parking motor, so that the vibration and noise generated in the operation process of the parking motor in the motor chamber can be reduced.

Drawings

Fig. 1 is an overall structural view of a parking motor of the present invention;

FIG. 2 is an exploded view of the parking motor of the present invention;

FIG. 3 is a schematic view of an air gap of the parking motor of the present invention;

fig. 4 is a schematic view of a stator core of the parking motor of the present invention;

FIG. 5 is a schematic structural diagram of a magnet ring and a stator core of the parking motor according to the present invention;

FIG. 6 is a schematic diagram showing the relationship between the magnetic ring height and the cogging torque of the parking motor according to the present invention;

fig. 7 is a schematic structural view of an insulating frame of the parking motor of the present invention;

FIG. 8 is a schematic view of a structure of the insulating frame and the terminal of the parking motor according to the present invention;

fig. 9 is a schematic structural view of a terminal of a parking motor of the present invention;

FIG. 10 is a schematic view of a parking motor and a motor chamber according to the present invention;

FIG. 11 is an exploded view of the parking motor and the shock absorbing pad according to the present invention;

FIG. 12 is a schematic view illustrating a shock absorbing pad of the parking system according to the present invention;

FIG. 13 is a schematic structural view of a self-locking assembly of the park system of the present invention;

FIG. 14 is a schematic structural view of an elastic clip provided on a shock pad of the parking system according to the present invention;

fig. 15 is a schematic view of the structure of the elastic clip of the crash pad and the annular groove of the parking system according to the present invention.

In the figure: the motor comprises a housing 1, a bearing chamber 11, an annular groove 12, an end cover 2, a stator structure 3, a stator core 31, a stator slot 32, a stator tooth neck 33, a stator pole shoe 35, a rotor structure 4, a rotor shaft 41, a magnetic ring 42, a shockproof elastic pad 5, an air gap 6, a terminal 7, an embedding part 71, a hanging part 72, a wiring port 721, a wire groove 723, an external connection part 73, a chamfer 731, an insulating framework 8, a plastic barrier rib 81, a connecting part 82, a motor chamber 9, a fixing part 101, an opening 102, an elastic sheet 103, an elastic clamping sheet 104 and a screw 105.

Detailed Description

In order that the manner in which the present invention is attained and can be understood in detail, a more particular description of the utility model briefly summarized above may be had by reference to the embodiments thereof which are illustrated in the appended drawings.

Example 1:

referring to fig. 1 to 9, the present embodiment provides a parking motor, including: a stator structure 3 and a rotor structure 4 used in cooperation; wherein the stator structure 3 comprises a stator core 31; the stator core 31 includes 6 stator teeth and 6 stator slots 32, and the 6 stator teeth and the 6 stator slots 32 are arranged at intervals to form a ring; the rotor structure 4 comprises a rotor shaft 41 and a magnet ring 42 arranged on the rotor shaft 41.

For the stator structure 3 of the present embodiment, as an example of a structure that facilitates machining, the stator core 31 includes 6 stator teeth that are all the same in shape and size, and 6 stator slots 32 that are all the same in shape and size. In this case, the following description of the present embodiment will be made for the case of the stator teeth and the stator slots 32, which is applicable to any one of the stator teeth and the stator slots 32.

Specifically, each stator tooth includes an integrally formed stator tooth neck 33 and stator pole piece 35; in which the side end of the stator pole piece 35 facing the stator slot 32 is protruded from the stator tooth neck 33, that is, the slot opening of the stator slot 32 in this embodiment is formed between two adjacent stator pole pieces 35, the parameter for determining the slot opening width of the stator slot 32 is determined by the distance between two adjacent stator pole pieces 35.

In the case of a stator pole piece 35 illustrated in the attached drawings, the end of the stator pole piece 35 facing the adjacent stator pole piece 35 in the present embodiment is not a flat end surface, but an angular surface, and for the same stator pole piece 35, the two ends facing the stator slot 32 are symmetrically distributed with respect to the radial center line of the stator tooth neck 33. With such a structure, for the adjacent two stator pole pieces 35, the distance of the notch of the stator slot 32 formed therebetween is the distance between the pointed ends of the angular surfaces of the opposite side ends of the adjacent two stator pole pieces 35, and for the one stator pole piece 35, the distance between the pointed ends of the angular surfaces of the two side ends thereof facing the stator slot 32 is the width of the largest radial surface of the stator pole piece 35.

On the basis of the above structure, it should be noted that the width L1 of the notch of each stator slot 32 in the present embodiment is between the width L2 of the inner end face of the stator pole shoe 35 facing the magnetic ring 42 and the maximum radial plane L3 of the stator pole shoe 35; namely: l2< L1< L3. As a specific example, L1-4.8 mm, L2-4.5 mm, L3-5.1 mm; substantially L1 ═ (L2+ L3)/2. Under such structure, through the width of the notch of increase stator slot 32, reduced the magnetic conductivity of notch, make the holistic magnetic leakage of parking motor reduce to increase the tooth's socket torque of parking motor, improved the auto-lock ability of parking system.

In addition, for the motor, the demagnetization resistance is mainly on the air gap 6, if the air gap 6 is too large, the magnetic resistance is increased, the excitation loss is large, and if the excitation current is increased, the overall power of the motor is reduced. The size of an air gap 6 formed between a rotor structure 4 and a stator structure 3 along the radial direction of the parking motor is 0.3-0.4 mm, for example, specifically, the inner diameter of the stator structure 3 is phi a 1-18 mm, and the outer diameter of a magnetic ring 42 is phi a 1-17.4 mm. The design of the smaller air gap 6 reduces the loss of exciting current, the power consumption of the integral parking motor can be obviously reduced under the condition of the same output power, and the integral power of the parking motor is improved.

Next, regarding the magnetic ring 42, it should be noted that the magnetic ring 42 of the present embodiment is magnetized by square waves; and both end portions of the magnetic ring 42 in the axial direction of the rotor shaft 41 are projected one-to-one from both end portions of the stator core 31 in the axial direction of the rotor shaft 41. In addition, in a preferable case, both end portions of the magnetic ring 42 in the axial direction of the rotor shaft 41 of the present embodiment are protruded to have the same height as both end portions of the stator core 31 in the axial direction of the rotor shaft 41. For example, in a specific case, the axial height of the magnetic ring 42 is designed to be 20mm, and the axial height of the stator core 31 is 14mm, so that the magnetic ring 42 is 3mm higher than the stator core on one side. Referring to fig. 5 and 6, in the present embodiment, the two end portions of the magnetic ring 42 along the axial direction of the rotor shaft 41 are protruded from the two end portions of the stator core 31 along the axial direction of the rotor shaft 41 one by one, so that the overall cogging torque of the parking motor can be further increased.

In addition, it should be noted that the stator structure 3 of the present embodiment further includes an insulating frame 8 disposed at an axial end of the stator core 31, and a terminal 7 formed on the insulating frame 8; wherein the terminal 7 comprises a hanging part 72, an embedding part 71 and an external connection part 73 which are integrally formed; the embedded part 71 is used for injection molding on the insulating framework 8; the external connection portion 73 is used for connecting an external connection terminal. Here, the string-hanging portion 72 is formed by bending the insertion portion 71, and the external connection portion 73 is formed by bending the insertion portion 71, and the string-hanging portion 72 and the external connection portion 73 are bent in opposite directions with respect to the insertion portion 71.

In a preferred structure, the external connection portion 73 of the terminal 7 is provided with a chamfer 731 to facilitate insertion with the external connection terminal 7, and the angle of the chamfer 731 can be adjusted as required.

On the basis of the above structure, further, a wire trough 723 for hanging the enameled wire and a wire hanging port communicated with the wire trough 723 are provided on the wire hanging part 72, and the enameled wire is suitable for being welded and fixed in the wire trough 723; the wire connection opening 721 and the wire chase 723 can optionally form a horn structure, so that the enameled wire is conveniently pulled into the wire chase 723 from the wire connection opening 721.

In summary, the insertion portion 71 of the terminal 7 is inserted into the connecting portion 82 of the insulating frame 8, so that the terminal 7 is firmly fixed on the insulating frame 8, and the position stability of the terminal 7 in the injection molding process is ensured. 3 terminals 7 are used on 1 insulating framework 8, enameled wires of windings of the stator structure 3 are placed in wire grooves 723 of the terminals 7 after being stripped of paint skins, and are fixed through soldering, and the terminals 7 and the enameled wires can be automatically welded through the structure. After the enameled wire is welded at the wire slot 723 on the terminal 7, the cavity of the connecting part 82 of the insulating framework 8 is filled with silica gel, so that the welded enameled wire is prevented from loosening, and meanwhile, an insulating effect can be achieved between two adjacent terminals 7 on the same insulating framework 8.

In addition, it should be noted that, in an alternative implementation, a plastic barrier strip 81 for separating the welding position of the enameled wire may be further disposed on the insulating framework 8 between every two adjacent terminals 7, so as to separate the soldering portion between the terminals 7 and ensure the safe distance between the terminals 7 after soldering.

Example 2:

referring to fig. 10 to 15, in addition to the parking motor of embodiment 1, the present embodiment provides a parking system, including: a parking motor and a motor chamber 9 cooperating with the parking motor in embodiment 1; the parking motor further comprises a machine shell 1 which is arranged on the outer side of the stator structure 3 and used for being matched and connected with the motor chamber 9, the machine shell 1 is matched and connected with an end cover 2, and the end cover 2 is provided with a bearing chamber used for assembling the output end of a rotor shaft 41 of the rotor structure 4.

Considering that there may be vibration noise between the parking motor and the motor chamber 9 of the parking system during the use of the parking motor, in order to reduce the vibration noise, the following design is made in this embodiment:

a shockproof elastic pad 5 is arranged between one side end of the casing 1 departing from the output end of the rotor shaft 41 and the motor chamber 9; the shockproof elastic pad 5 is used for forming elastic fit between the machine shell 1 and the motor chamber 9; the shockproof elastic pad 5 comprises a fixed part 101 matched with the machine shell 1, and a pair of elastic sheets 103 which are integrally connected with the fixed part 101 and are used for being abutted and matched with the inner wall of the motor chamber 9; the pair of elastic pieces 103 are each connected to the fixed portion 101 at one end and the movable end at the other end, and the movable end is convex relative to the fixed portion 101, and the height of the protrusion is L5, so that the elastic pieces 103 can be abutted and matched with the inner wall of the motor chamber 9 when the fixed portion 101 is fixed to the housing 1. Through the structure, the shockproof elastic pad 5 can provide an axial upward pretightening force for the parking motor, so that the parking motor is in a fixed and pressing state, and the vibration of the parking motor in the operation process is reduced.

Furthermore, as for the matching manner between the fixing portion 101 and the casing 1, a screw 105 fastening manner may be alternatively adopted, and a rivet fitting manner may also be adopted, which is not limited in this embodiment.

In another optional case, on the basis that the fixing portion 101 is fixedly coupled to the housing 1, the fixing portion 101 of the embodiment may further be coupled to the housing 1 through a self-locking assembly; the fixing portion 101 is provided with an opening 102 which is in sleeve fit with the outer wall of the bearing chamber 11 of the housing 1, in this case, a structure of a self-locking assembly is illustrated, which includes an annular groove 12 provided on the outer wall of the bearing chamber 11 of the housing 1, and a plurality of elastic clamping pieces 104 arranged in an array and surrounding to form an annular structure, provided on the hole wall of the opening 102 of the fixing portion 101; a plurality of resilient tabs 104 are adapted to snap into the annular groove 12. Under such structure, the elastic clamping piece 104 is pressed in the annular groove 12 on the machine shell 1, thereby realizing the self-locking of the shockproof elastic pad 5, and avoiding the failure of the shockproof elastic pad 5 caused by the larger gap or the falling off of the shockproof elastic pad 5 and the machine shell 1 due to the loosening of the rivet or the screw 105 in the long-time use process of the parking motor.

In summary, the parking motor of the embodiment adds the shockproof elastic pad 5 at the contact position between the bottom of the casing 1 of the parking motor and the motor chamber 9 of the parking system, and the shockproof elastic pad 5 is fixed on the casing 1 of the parking motor to provide an axial elastic force for the parking motor, so that the vibration and noise generated in the operation process of the parking motor in the motor chamber 9 can be reduced.

The above embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the present invention, unless otherwise expressly stated or limited, the first feature may be present on or under the second feature in direct contact with the first and second feature, or may be present in the first and second feature not in direct contact but in contact with another feature between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

Claims (10)

1. A parking motor, comprising: a stator structure and a rotor structure which are used together; wherein

The stator structure comprises a stator core; the stator core comprises a plurality of stator teeth and a plurality of stator slots, and the plurality of stator teeth and the plurality of stator slots are arranged in a ring shape at intervals;

the rotor structure comprises a rotor shaft and a magnetic ring arranged on the rotor shaft; and

each stator tooth comprises a stator tooth neck and a stator pole shoe which are integrally formed; wherein

The width L1 of the slot opening of each stator slot is between the width L2 of the inner end surface of the stator pole shoe facing the magnetic ring and the width L3 of the maximum radial surface of the stator pole shoe.

2. The parking motor of claim 1, wherein L1 ═ (L2+ L3)/2.

3. Parking motor according to claim 1 or 2, wherein the size of the air gap formed between the rotor structure and the stator structure in the radial direction of the parking motor is 0.3mm to 0.4 mm.

4. The parking motor according to claim 1 or 2, wherein the magnetic ring is magnetized with square waves; and

two end parts of the magnetic rings along the axial direction of the rotor shaft are protruded from two end parts of the stator core along the axial direction of the rotor shaft one to one.

5. The parking motor of claim 4, wherein both ends of the magnetic ring in the axial direction of the rotor shaft are protruded by the same height as both ends of the stator core in the axial direction of the rotor shaft, respectively.

6. The parking motor according to claim 1, wherein the stator structure further comprises an insulating frame provided at an axial end of the stator core and a terminal formed on the insulating frame; wherein

The terminal comprises a hanging wire part, an embedded injection part and an external connection part which are integrally formed;

a wire groove for hanging the enameled wire and a wire hanging port communicated with the wire groove are formed in the wire hanging part;

the embedded injection part is used for injection molding on the insulating framework;

the external connection part is used for connecting an external terminal.

7. A parking system, comprising a parking motor according to any one of claims 1 to 6 and a motor chamber engaged with the parking motor; wherein

The parking motor further comprises a machine shell which is arranged on the outer side of the stator structure and is used for being matched and connected with the motor chamber.

8. The parking system of claim 7, wherein a shock-proof elastic pad is further arranged between one side end of the casing, which is far away from the output end of the rotor shaft, and the motor chamber;

the shockproof elastic pad is used for forming elastic fit between the shell and the motor chamber; and

the shockproof elastic pad comprises a fixing part matched with the shell in a matching mode and at least one elastic sheet which is integrally connected with the fixing part and is used for being abutted and matched with the inner wall of the motor chamber.

9. The park system according to claim 8, wherein the anchor portion is coupled to the housing by a screw or a rivet.

10. The park system according to claim 8 or 9, wherein the fixed portion is coupled with the housing by a self-locking assembly; and

the self-locking assembly comprises an annular groove arranged on the outer wall of the bearing chamber of the shell and a plurality of elastic clamping pieces which are arranged on the fixing part and surround to form an annular structure;

a plurality of the elastic clamping pieces are suitable for being clamped and embedded in the annular groove.

Images