Motor

Abstract

The utility model provides a motor. The motor comprises a housing, a stator and a rotor. The stator and the rotor are arranged in the shell, the stator is arranged around the rotor, the rotor is provided with a rotor iron core, a winding and a high-molecular polymer slot wedge, the rotor iron core is provided with a plurality of straight slots, the winding is arranged in the straight slots, the high-molecular polymer slot wedge is arranged in the straight slots, and the high-molecular polymer slot wedge is arranged in the straight slots. And the high-molecular polymer slot wedge is respectively bonded with the inner wall of the straight slot and the winding. Compared with the prior art, the motor provided by the utility model adopts the high-molecular polymer as the slot wedge to be fixed in the straight slot, and the winding, the rotor core and the slot wedge are integrated through a bonding mode, so that the overall structural strength is improved, the winding is effectively prevented from running out of the straight slot, and the production process is greatly simplified; the sealing performance of the whole shell is effectively improved through the sealing structure; the contact area of the carbon brush and the commutator is reduced, so that the motor operates with low noise.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a motor. Background Art

[0002] The electric shift mechanism achieves gear shifting by controlling the movement of the gearbox's speed-changing components. It is currently widely used in the field of electric vehicles. The electric shift mechanism usually includes a shift motor and a gear transmission assembly. The shift motor drives the gearbox's speed-changing components to move through the gear transmission assembly to achieve gear shifting.

[0003] At present, the rotor of the gear shift motor uses insulating paper inserted into the slot to block the winding and prevent the winding from running out. This process is relatively complicated and the production efficiency is low. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies in the prior art and provide a motor.

[0005] An embodiment of the utility model provides an electric motor, comprising: a housing, a stator and a rotor.

[0006] The stator and the rotor are arranged in the shell, the stator is arranged around the rotor, the rotor is provided with a rotor core, a winding and a polymer slot wedge, the rotor core is provided with a plurality of straight slots, the winding is arranged in the straight slot, the polymer slot wedge is arranged in the straight slot, the polymer slot wedge is located on the side of the winding facing the slot opening of the straight slot, and the polymer slot wedge is respectively bonded to the inner wall of the straight slot and the winding.

[0007] In some optional embodiments, the motor further includes a commutation device, which includes a commutator and two carbon brushes, wherein the commutator is disposed on the rotor and electrically connected to the winding, and the carbon brush is disposed in the housing and slidingly engaged with the commutator.

[0008] In some optional embodiments, a plurality of protruding arc-shaped sawtooth portions are arranged on the carbon brush, and the arc-shaped sawtooth portions are slidably matched with the commutator.

[0009] In some optional embodiments, the shell includes a front end cover and a rear shell, the front end cover and the rear shell are detachably connected, the front end cover and the rear shell surround and form a accommodating cavity, the front end cover is provided with a through hole connected to the accommodating cavity, the rotor and the stator are arranged in the accommodating cavity, and part of the rotor is passed through the through hole.

[0010] In some optional embodiments, the motor further comprises a sealing structure, wherein the sealing structure comprises an oil seal, and the oil seal is disposed in the through hole and arranged around the rotor.

[0011] In some optional embodiments, the oil seal is a double-lip oil seal, and a main lip and a dustproof auxiliary lip are provided on the inner side of the oil seal. The main lip and the dustproof auxiliary lip are arranged around the rotor and slidingly cooperate with the rotor. The main lip and the dustproof auxiliary lip are arranged in sequence in a direction close to the accommodating cavity.

[0012] In some optional embodiments, the motor further comprises a sealing structure, wherein the sealing structure comprises a sealing gasket, and the sealing gasket is arranged between the front end cover and the rear shell.

[0013] In some optional embodiments, protrusions are respectively provided on both sides of the sealing gasket, the protrusions on both sides of the sealing gasket abut against the front end cover and the rear shell respectively, and the protrusions are arranged around the accommodating cavity.

[0014] In some optional embodiments, positioning parts are respectively provided on both sides of the sealing gasket, and the positioning parts on both sides of the sealing gasket extend into the front end cover and the rear shell respectively.

[0015] In some optional embodiments, a positioning groove is provided on the front end cover, and the sealing gasket is positioned and matched with the positioning groove.

[0016] Compared with the prior art, the motor of the utility model adopts high molecular polymer as slot wedge fixed in the straight slot, and makes the winding, rotor core and slot wedge become a whole by bonding, thereby improving the overall structural strength, effectively preventing the winding from running out of the straight slot, and greatly simplifying the production process; in addition, the sealing structure effectively improves the overall sealing of the shell; in addition, the carbon brush contacts the commutator with a serrated portion, which reduces the contact area between the carbon brush and the commutator while meeting the current density of the carbon brush, and gradually forms an oxide film during the commutation process, thereby reducing the mechanical noise during commutation, and making the motor run with low noise.

[0017] In order to more clearly understand the present invention, the specific implementation of the present invention will be described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a motor according to an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of a rotor according to an embodiment of the utility model;

[0020] Figure 3A cross-sectional view of a rotor according to an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the structure of a carbon brush according to an embodiment of the utility model;

[0022] Figure 5 An exploded view of a motor according to an embodiment of the utility model;

[0023] Figure 6 A cross-sectional view of a motor according to an embodiment of the present utility model;

[0024] Figure 7 A cross-sectional view of an oil seal according to an embodiment of the utility model;

[0025] Figure 8 This is a structural schematic diagram of one side of a sealing gasket according to an embodiment of the utility model;

[0026] Fig. 9 This is a schematic structural diagram of the other side of a sealing gasket according to an embodiment of the utility model.

[0027] Description of reference numerals:

[0028] 10. Shell; 11. Front cover; 12. Rear shell; 13. Accommodating cavity; 14. Positioning groove; 20. Stator; 30. Rotor; 31. Rotor core; 32. Winding; 33. High polymer slot wedge; 34. Straight slot; 40. Commutator; 41. Carbon brush; 42. Arc serrated portion; 50. Oil seal; 51. Main lip; 52. Dustproof auxiliary lip; 53. Sealing gasket; 54. Raised portion; 55. Positioning portion. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. In the description of the utility model, unless otherwise specified, "multiple" means 2 or more, and "several" means 1 or more. In addition, unless otherwise specified, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are 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 therefore should not be understood as a limitation on the present invention.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the description of the utility model, the description with reference to the terms "one embodiment", "some optional implementations" or "some optional embodiments" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0033] See also Figure 1 and Figure 2 An embodiment of the utility model provides an electric motor, including: a housing 10 , a stator 20 and a rotor 30 .

[0034] See also Figure 3 and Figure 4 The stator 20 and the rotor 30 are arranged in the housing 10. The stator 20 is arranged around the rotor 30. The rotor 30 is provided with a rotor 30 core, a winding 32 and a polymer slot wedge 33. The rotor 30 core is provided with a plurality of straight slots 34. The winding 32 is arranged in the straight slot 34. The polymer slot wedge 33 is arranged in the straight slot 34. The polymer slot wedge 33 is located on the side of the winding 32 facing the slot 34. The polymer slot wedge 33 is bonded to the inner wall of the straight slot 34 and the winding 32 respectively. The polymer is used as the slot wedge to fill the straight slot 34. The winding 32, the rotor 30 core and the slot wedge are made into a whole by bonding, which improves the overall structural strength, effectively prevents the winding 32 from running out of the straight slot 34, and greatly simplifies the production process.

[0035] In some optional embodiments, the motor further includes a commutation device, which includes a commutator 40 and two carbon brushes 41. The commutator 40 is disposed on the rotor 30 and is electrically connected to the winding 32. The carbon brushes 41 are disposed in the housing 10 and are slidably matched with the commutator 40. The commutator 40 includes a plurality of commutator segments, which are arranged around the rotor 30, and the carbon brushes 41 are in sliding contact with the commutator segments.

[0036] See also Figure 5 In some optional embodiments, a plurality of protruding arc-shaped sawtooth portions 42 are arranged on the carbon brush 41, and the arc-shaped sawtooth portions 42 are slidably matched with the commutator 40. The carbon brush 41 contacts the commutator 40 using the arc-shaped sawtooth portions 42, which reduces the contact area between the carbon brush 41 and the commutator 40 while satisfying the current density of the carbon brush 41, and gradually forms an oxide film during the commutation process, thereby reducing the mechanical noise during commutation, and making the motor run with low noise.

[0037] In this embodiment, the arc-shaped sawtooth portion 42 has a width of 4.0 mm, a height of 10.0 mm, and a length of 10.0 mm. The interval between adjacent arc-shaped sawtooth portions 42 is 1.2 mm. The angle formed by the slopes on both sides of the arc-shaped sawtooth portion 42 is 60°.

[0038] See also Figure 6 The specific structure of the housing 10 can be designed according to actual needs. For example, in some optional embodiments, the housing 10 includes a front cover 11 and a rear shell 12, which are detachably connected. The front cover 11 and the rear shell 12 surround and form a receiving chamber 13. The front cover 11 is provided with a through hole communicating with the receiving chamber 13. The rotor 30 and the stator 20 are arranged in the receiving chamber 13, and part of the rotor 30 is passed through the through hole. In this embodiment, the front cover 11 and the commutator 40 are fixed by using an aluminum alloy self-piercing riveting process.

[0039] See also Figure 7 In some optional embodiments, the motor further includes a sealing structure, which includes an oil seal 50. The oil seal 50 is disposed in the through hole and arranged around the rotor 30, which is beneficial to preventing oil leakage.

[0040] In a conventional double-lip oil seal 50, the main lip is usually located on a side of the oil seal 50 close to the inside of the housing 10, and the auxiliary lip is close to a side outside the housing 10, thereby achieving the effect of first preventing dust and then preventing oil. Since the motor of the shift mechanism is arranged in the car, the oil seal 50 only needs to achieve the effect of preventing oil leakage. In some optional embodiments, the oil seal 50 is a double-lip oil seal 50, and a main lip 51 and a dustproof auxiliary lip 52 are provided on the inner side of the oil seal 50. The main lip 51 and the dustproof auxiliary lip 52 are arranged around the rotor 30 and slide with the rotor 30. The main lip 51 and the dustproof auxiliary lip 52 are arranged in sequence in a direction close to the accommodating chamber 13. By arranging the main lip 51 on the side of the oil seal 50 close to the outside of the housing 10 and the auxiliary lip close to the inside of the housing 10, the oil pressure generated by the front cover 11 when oil leaks can cause a local slight deformation of the oil seal 50, so that the oil seal 50 tightly hugs the rotor 30 to achieve the oil-proof effect.

[0041] In some optional embodiments, the motor further includes a sealing structure, which includes a sealing gasket 53 . The sealing gasket 53 is disposed between the front end cover 11 and the rear shell 12 to improve the sealing between the front end cover 11 and the rear shell 12 .

[0042] See also Figure 8 and Fig. 9 In some optional embodiments, protrusions 54 are respectively provided on both sides of the sealing gasket 53, and the protrusions 54 on both sides of the sealing gasket 53 respectively abut against the front end cover 11 and the rear shell 12, and the protrusions 54 are arranged around the accommodating cavity 13. When the front end cover 11 and the rear shell 12 of the sealing gasket 53 are clamped, the protrusions 54 are squeezed and deformed, thereby facilitating improving the sealing between the front end cover 11 and the rear shell 12.

[0043] In some optional embodiments, positioning portions 55 are respectively provided on both sides of the sealing gasket 53, and the positioning portions 55 on both sides of the sealing gasket 53 extend into the front end cover 11 and the rear shell 12 respectively, thereby facilitating improving the position stability between the sealing gasket 53 and the front end cover 11 and the rear shell 12, and avoiding the sealing gasket 53 from shifting its position.

[0044] In some optional embodiments, a positioning groove 14 is provided on the front end cover 11, and the sealing gasket 53 is positioned and matched with the positioning groove 14, so as to achieve pre-positioning of the sealing gasket 53. When the front end cover 11 and the rear shell 12 are assembled with each other, the sealing gasket 53 is not easily displaced.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric motor, characterized in that: include: housing, stator and rotor; The stator and the rotor are arranged in the shell, the stator is arranged around the rotor, the rotor is provided with a rotor core, a winding and a polymer slot wedge, the rotor core is provided with a plurality of straight slots, the winding is arranged in the straight slot, the polymer slot wedge is arranged in the straight slot, the polymer slot wedge is located on the side of the winding facing the slot opening of the straight slot, and the polymer slot wedge is respectively bonded to the inner wall of the straight slot and the winding.

2. The electric motor according to claim 1, characterized in that: It also includes a commutation device, which includes a commutator and two carbon brushes. The commutator is arranged on the rotor and is electrically connected to the winding. The carbon brush is arranged in the housing and is slidably matched with the commutator.

3. The electric motor according to claim 2, characterized in that: A plurality of protruding arc-shaped sawtooth portions are arranged on the carbon brush, and the arc-shaped sawtooth portions are slidably matched with the commutator.

4. A motor according to any one of claims 1 to 3, characterized in that: The shell includes a front end cover and a rear shell, the front end cover and the rear shell are detachably connected, the front end cover and the rear shell surround and form a accommodating cavity, the front end cover is provided with a through hole connected to the accommodating cavity, the rotor and the stator are arranged in the accommodating cavity, and part of the rotor is passed through the through hole.

5. The electric motor according to claim 4, characterized in that: A sealing structure is also included. The sealing structure includes an oil seal. The oil seal is disposed in the through hole and is arranged around the rotor.

6. The electric motor according to claim 5, characterized in that: The oil seal is a double-lip oil seal, and a main lip and a dustproof auxiliary lip are arranged on the inner side of the oil seal. The main lip and the dustproof auxiliary lip are arranged around the rotor and slidingly cooperate with the rotor. The main lip and the dustproof auxiliary lip are arranged in sequence in a direction close to the accommodating cavity.

7. The electric motor according to claim 4, characterized in that: It also includes a sealing structure, which includes a sealing gasket, and the sealing gasket is arranged between the front end cover and the rear shell.

8. The electric motor according to claim 7, characterized in that: The sealing gasket is provided with raised parts on both sides, respectively. The raised parts on both sides of the sealing gasket abut against the front end cover and the rear shell, respectively. The raised parts are arranged around the accommodating cavity.

9. The electric motor according to claim 7, characterized in that: Positioning parts are respectively arranged on both sides of the sealing gasket, and the positioning parts on both sides of the sealing gasket extend into the front end cover and the rear shell respectively.

10. The electric motor according to claim 7, characterized in that: The front end cover is provided with a positioning groove, and the sealing gasket is positioned and matched with the positioning groove.

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