Vehicle motor

Abstract

The utility model relates to a vehicle motor, which comprises a shell, a rotor, a stator and an end cover, the shell is provided with an accommodating cavity, the accommodating cavity is communicated with the outside and is provided with an opening at one end of the shell, the rotor and the stator are arranged in the accommodating cavity, and the end cover is detachably connected with the opening. The rotor comprises a rotating shaft, a rotor iron core arranged on the rotating shaft and a rotor winding arranged on the rotor iron core, and is characterized in that a first limiting assembly and a second limiting assembly are arranged in the axial direction of the rotating shaft, and the first limiting assembly and the second limiting assembly are arranged in a mirror image mode; the first limiting assembly comprises a first bearing and a first limiting piece which is arranged on the rotating shaft and abuts against one end of the first bearing, the other end of the first bearing abuts against the shell, and the second limiting assembly comprises a second bearing and a second limiting piece which is arranged on the rotating shaft and abuts against one end of the second bearing. And the other end of the second bearing is propped against the shell, so that the mounting difficulty is also reduced while the axial movement can be prevented.

Description

Technical Field

[0001] This utility model relates to the field of motors, specifically to a vehicle motor. Background Technology

[0002] Existing automotive motors include wiper motors and window regulator motors. Patent number CN110011506B discloses an automotive window regulator motor. To prevent axial movement of the rotor shaft and make the rotor rotation more stable, a first steel ball and a second steel ball are respectively attached to both ends of the rotor shaft to eliminate the axial clearance of the rotor shaft and prevent axial movement. However, in the above structure, the first steel ball and the second steel ball need to be placed in the corresponding cavity of the housing before the rotor shaft is inserted. The rotor shaft needs to be coaxial with the first steel ball and the second steel ball. Since the first steel ball and the second steel ball will move, the alignment is difficult, making the installation of the motor very difficult and cumbersome. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology.

[0004] This invention provides an automotive motor that prevents axial movement while reducing installation difficulty.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a vehicle motor, comprising a housing, a rotor, a stator, and an end cover, wherein the housing has a receiving cavity, the receiving cavity is connected to the outside and has an opening at one end, the rotor and the stator are disposed within the receiving cavity, and the end cover is detachably connected to the opening, the rotor comprising a rotating shaft, a rotor core disposed on the rotating shaft, and a rotor winding disposed on the rotor core, characterized in that: a first limiting component and a second limiting component mirror-displayed along the axial direction of the rotating shaft are provided, the first limiting component comprising a first bearing and a first limiting member disposed on the rotating shaft and abutting against one end of the first bearing, the other end of the first bearing abutting against the housing, the second limiting component comprising a second bearing and a second limiting member disposed on the rotating shaft and abutting against one end of the second bearing, the other end of the second bearing abutting against the housing.

[0006] A further feature of this invention is that: the end cap has a through hole, one end of the rotating shaft passes through the through hole to the outside of the end cap and has an output end, the end cap has a first mounting groove for the first bearing to be embedded, the first mounting groove communicates with the through hole, the housing has a second mounting groove for the second bearing to be embedded at one end of the cavity opposite to the opening, the first bearing is embedded in the first mounting groove and abuts against the bottom of the first mounting groove, the second bearing is embedded in the second mounting groove and abuts against the bottom of the second mounting groove.

[0007] The present invention, possessing the above-mentioned features, comprises: a first bearing abutting against the bottom of a first mounting groove to prevent the first bearing from displacing along the shaft toward the side away from the commutator; a second bearing abutting against the bottom of a second mounting groove to prevent the second bearing from displacing along the shaft toward the side away from the armature; a first limiting member preventing the first bearing from displacing toward the commutator; and a second limiting member preventing the second bearing from displacing toward the armature. That is, the bottom of the first mounting groove and the first limiting member achieve axial limiting of the first bearing, and the bottom of the second mounting groove and the second limiting member achieve axial limiting of the second bearing, thereby fixing the relative positions of the first and second bearings with respect to the shaft. Simultaneously, it limits the axial position of the shaft within the receiving cavity, preventing axial displacement of the shaft within the receiving cavity and preventing axial movement of the shaft. Furthermore, the first and second bearings are respectively embedded in the first and second mounting cavities, preventing circumferential displacement of the shaft and ensuring the stability of the shaft's rotation.

[0008] A further feature of this invention is that both the first limiting member and the second limiting member are retaining rings, and the rotating shaft has retaining grooves adapted to the retaining rings on the side of the first bearing facing the second bearing and on the side of the second bearing facing the first bearing, respectively. One retaining ring engages with one retaining groove.

[0009] The present invention, which has the above-mentioned features, has a retaining ring that is inserted into a groove on a rotating shaft to fix the relative position of the retaining ring and the rotating shaft, and works in conjunction with the bottom of the first mounting groove and the bottom of the second mounting groove to limit the positioning of the first bearing and the second bearing.

[0010] A further feature of this invention is that: the end cap has a first cavity communicating with the first mounting groove at the bottom of the first mounting groove corresponding to the inner ring of the first bearing; only the outer ring of the first bearing abuts against the bottom of the first mounting groove; and the inner ring of the first bearing is suspended in the first cavity. The housing has a second cavity communicating with the second mounting groove at the bottom of the second mounting groove corresponding to the inner ring of the second bearing; only the outer ring of the second bearing abuts against the bottom of the second mounting groove; and the inner ring of the second bearing is suspended in the second cavity.

[0011] The present invention, which has the above-mentioned features, has a first cavity and a second cavity, which prevent the inner ring portion of the first bearing and the inner ring portion of the second bearing from contacting other parts, thereby reducing the generation of friction and avoiding unnecessary wear of the first bearing and the second bearing.

[0012] A further feature of this invention is that a gap is provided between the end of the rotating shaft with the second bearing and the inner wall of the second cavity.

[0013] The present invention, which has the above-mentioned features, ensures that the end of the rotating shaft with the second bearing does not contact other parts, thereby reducing the generation of friction.

[0014] A further feature of this invention is that the diameter of the retaining ring is less than or equal to the diameter of the inner ring of the first bearing and the diameter of the inner ring of the second bearing.

[0015] The present invention having the above features: the inner and outer rings of the first bearing and the inner and outer rings of the second bearing move relative to each other; the inner rings of the first bearing, the inner rings of the second bearing, and the retaining ring all rotate with the shaft; the diameter of the retaining ring does not exceed the diameter of the inner ring of the first bearing or the inner ring of the second bearing, so as to avoid contact and friction between the retaining ring and the outer rings of the first bearing and the outer rings of the second bearing.

[0016] A further feature of this invention is that the rotating shaft is equipped with a reversing component.

[0017] The present invention, which has the above-mentioned features, has a reversing component that enables the rotation direction of the rotating shaft to change.

[0018] A further feature of this invention is that the stator includes at least two magnets, and positioning brackets are respectively provided between the two circumferential ends of adjacent magnets. The positioning brackets include an arc-shaped portion and straight rod portions respectively provided at the ends of the arc-shaped portion. The two straight rod portions are parallel to each other, and the straight rod portions abut against one end of the magnet on the same side.

[0019] The present invention, which has the above-mentioned features, can achieve the positioning of magnets by inserting the positioning bracket between adjacent magnets, avoiding the need to open the inner wall of the receiving cavity to install the magnets or to apply glue to the magnets to fix them, reducing the processing steps of the housing, reducing costs, avoiding the problem of glue delamination caused by the temperature generated by the motor operation, and the installation operation of the positioning bracket is simple.

[0020] A further feature of this invention is that: the end cover is provided with a rotating shaft sleeve, the rotating shaft sleeve is coaxially provided with a rotating shaft cavity corresponding to the through hole, the output end is provided with a thread, the rotating shaft cavity is connected to a reduction gear box, the reduction gear box is provided with a reduction gear, and part of the reduction gear is placed in the rotating shaft cavity and engages with the thread of the output end.

[0021] The present invention, which has the above-mentioned features, has the following characteristics: the force generated at the output end of the rotating shaft is reduced and output by a reduction gear, so that the motor can be used for work that requires a reduction in speed.

[0022] A further feature of this invention is that a gap is provided between the output end and the inner wall of the rotating shaft cavity.

[0023] The present invention, which has the above-mentioned features, avoids friction between the threaded part and other parts.

[0024] The beneficial effects of this utility model are as follows: by setting the first bearing and the second bearing, and by limiting the double ends of the first bearing and the second bearing respectively, the purpose of preventing axial movement of the shaft is achieved. At the same time, the first bearing and the second bearing can also prevent circumferential displacement of the shaft, ensuring the stability of the shaft rotation, enabling the shaft to rotate at high speed, increasing the adaptability of the motor. In addition, it reduces the need for additional components to prevent axial movement of the shaft, avoids the alignment problem between the shaft and the components to prevent axial movement of the shaft during installation, and reduces the difficulty of installation.

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0026] Figure 1 This is a perspective view of an embodiment of the present utility model.

[0027] Figure 2 This is an exploded view of an embodiment of the present invention.

[0028] Figure 3 This is a cross-sectional schematic diagram of an embodiment of the present utility model.

[0029] Figure 4 This is an exploded view of the rotor, the first bearing, and the second bearing in an embodiment of this utility model.

[0030] Figure 5 This is a three-dimensional schematic diagram of the end cap of an embodiment of the present utility model.

[0031] Figure 6 This is a three-dimensional schematic diagram of the shell of an embodiment of the present utility model.

[0032] Figure 7 This is a three-dimensional schematic diagram of the positioning bracket according to an embodiment of the present utility model. Detailed Implementation

[0033] like Figure 1 —— Figure 7The illustrated automotive motor includes a housing 1, a rotor 2, a stator 3, an end cover 4, and a commutation assembly 5. The commutation assembly 5 can be a carbon brush assembly for a brushed motor or a commutation assembly for a brushless motor, etc. In this embodiment, the commutation assembly 5 uses a carbon brush assembly. The housing 1 has a receiving cavity 101, which is connected to the outside. An opening 10101 is provided at one end of the housing. The rotor 2 and the stator 3 are disposed in the receiving cavity 101. The rotor 2 includes a shaft 201, an armature 202 disposed on the shaft 201, and a commutator 203. The commutator 203 is disposed on one side of the armature 202. The stator 3 is circumferentially disposed around the armature 202 on the inner wall of the receiving cavity 101. The end cover 4 is detachably connected to the opening 10101. The end cover 4 has an opening for the shaft 201 to... A through hole 405 is provided for the commutation assembly 5, which includes a brush holder 501 and carbon brushes 502 disposed on the brush holder 501. The end cover 4 has a brush holder mounting groove 404. The brush holder 501 is disposed within the brush holder mounting groove 404 and extends to the outside of the end cover 4, where it has wiring pins for electrical connection. A rotating shaft 201 passes through the brush holder 501, and the carbon brushes 502 are disposed corresponding to the commutator 203. A first bearing 6 is provided at the end of the rotating shaft 201 opposite to the armature 202, and a second bearing 7 is provided at the end of the rotating shaft 201 opposite to the armature 202. The end cover 4 has a first mounting groove 401 for the first bearing 6 to be embedded in. The first mounting groove 401 communicates with the brush holder mounting groove 404. 01 communicates with the through hole 405. The housing 1 has a second mounting groove 102 for the second bearing 7 to be embedded in the cavity 101 at one end opposite the opening 10101. The first bearing 6 is embedded in the first mounting groove 401 and abuts against the bottom of the first mounting groove 401. The second bearing 7 is embedded in the second mounting groove 102 and abuts against the bottom of the second mounting groove 102. The first bearing 6 is provided with a first limiting member 8 on the side facing the commutator 203 to prevent the first bearing 6 from displacing along the shaft 201 toward the commutator 203. The second bearing 7 is provided with a second limiting member 9 on the side facing the armature 202 to prevent the second bearing 7 from displacing along the shaft 201 toward the armature 202. The end cover 4 has a corresponding opening at the bottom of the first mounting groove 401 corresponding to the inner ring of the first bearing 6. The first cavity 402 communicates with the first mounting groove 401. Only the outer ring of the first bearing 6 abuts against the bottom of the first mounting groove 401, while the inner ring of the first bearing 6 is suspended in the first cavity 402. The housing 1 has a second cavity 103 at the bottom of the second mounting groove 102, corresponding to the inner ring of the second bearing 7, communicating with the second mounting groove 102. Only the outer ring of the second bearing 7 abuts against the bottom of the second mounting groove 102, while the inner ring of the second bearing 7 is suspended in the second cavity 103. A gap exists between the end of the rotating shaft 201 with the second bearing 7 and the inner wall of the second cavity 103. In this embodiment, the end of the rotating shaft 201 with the second bearing 7 is flush with the end face of the second bearing 7 facing the second cavity 103. Both the first limiting member 8 and the second limiting member 9 are retaining rings.The rotating shaft 201 has slots 20101 adapted to retaining rings on the side of the first bearing 6 facing the commutator 203 and on the side of the rotating shaft 201 facing the armature 202 of the second bearing 7. A retaining ring engages with a slot 20101. The diameter of the retaining ring does not exceed the inner diameter of the first bearing 6 and the inner diameter of the second bearing 7. The first limiting member 8 and the second limiting member 9 can also be protrusions fixedly connected to the rotating shaft 201. To reduce the difficulty of rotating shaft processing, the first limiting member 8 and the second limiting member 9 preferably adopt a retaining ring and slot matching technical solution. The stator 3 includes at least two magnets. Positioning brackets 10 are respectively abutted between the two circumferential ends of adjacent magnets. The positioning bracket 10 includes an arc-shaped portion 1001 and straight rod portions 1002 at the ends of the arc-shaped portion 1001. The two straight rod portions 1002 are parallel to each other and abut one end of the magnet on the same side. The end cap 4 is provided with a rotating shaft sleeve 403. The rotating shaft sleeve 403 is coaxially provided with a rotating shaft cavity 40301 corresponding to the through hole 405. A rotating shaft 201 passes through the rotating shaft cavity 40301 and is provided with an output end 13. The output end 13 is threaded. A reduction gearbox 11 is connected to the rotating shaft cavity 40301. The reduction gearbox 11 is provided with a reduction gear 12. Part of the reduction gear 12 is placed inside the rotating shaft cavity 40301 and engages with the threaded connection of the output end 13. A gap is provided between the output end 13 and the inner wall of the rotating shaft cavity 40301.

[0034] In this embodiment, the end cover 4 is provided with a rotating shaft sleeve 403 and a reduction gear box 11. Alternatively, the end cover 4 may not be provided with a rotating shaft sleeve 403 and a reduction gear box 11. The rotating shaft 201 can be directly inserted through the through hole 405 to the outside of the receiving cavity to cooperate with the linkage component and the part to be transmitted.

Claims

1. An automotive motor, comprising a housing, a rotor, a stator, and an end cover, wherein the housing has a receiving cavity communicating with the outside and an opening at one end of the housing, the rotor and the stator are disposed within the receiving cavity, the end cover is detachably connected to the opening, the rotor includes a rotating shaft, a rotor core disposed on the rotating shaft, and a rotor winding disposed on the rotor core, characterized in that: A first limiting component and a second limiting component mirror-arranged along the axial direction of the rotating shaft are provided. The first limiting component includes a first bearing and a first limiting member disposed on the rotating shaft and abutting one end of the first bearing. The other end of the first bearing abuts against the housing. The second limiting component includes a second bearing and a second limiting member disposed on the rotating shaft and abutting one end of the second bearing. The other end of the second bearing abuts against the housing.

2. The vehicle motor according to claim 1, characterized in that: The end cap has a through hole, and one end of the rotating shaft passes through the through hole to the outside of the end cap to provide an output end. The end cap has a first mounting groove for the first bearing to be embedded in, and the first mounting groove communicates with the through hole. The housing has a second mounting groove for the second bearing to be embedded in at one end of the cavity opposite to the opening. The first bearing is embedded in the first mounting groove and abuts against the bottom of the first mounting groove. The second bearing is embedded in the second mounting groove and abuts against the bottom of the second mounting groove.

3. The vehicle motor according to claim 1, characterized in that: Both the first limiting member and the second limiting member are retaining rings. The rotating shaft has retaining grooves adapted to the retaining rings on the side of the first bearing facing the second bearing and on the side of the second bearing facing the first bearing, respectively. One retaining ring engages with one retaining groove.

4. The vehicle motor according to claim 2, characterized in that: The end cap has a first cavity at the bottom of the first mounting groove corresponding to the inner ring of the first bearing, which communicates with the first mounting groove. Only the outer ring of the first bearing abuts against the bottom of the first mounting groove, and the inner ring of the first bearing is suspended in the first cavity. The housing has a second cavity at the bottom of the second mounting groove corresponding to the inner ring of the second bearing, which communicates with the second mounting groove. Only the outer ring of the second bearing abuts against the bottom of the second mounting groove, and the inner ring of the second bearing is suspended in the second cavity.

5. A vehicle motor according to claim 4, characterized in that: The rotating shaft has a second bearing at one end, and there is a gap between the end of the bearing and the inner wall of the second cavity.

6. A vehicle motor according to claim 3, characterized in that: The diameter of the retaining ring is less than or equal to the diameter of the inner ring of the first bearing and the diameter of the inner ring of the second bearing.

7. A vehicle motor according to claim 1, 3, or 5, characterized in that: The rotating shaft linkage is equipped with a reversing component.

8. A vehicle motor according to claim 1, characterized in that: The stator includes at least two magnets, and positioning brackets are respectively provided between the two ends of adjacent magnets in the circumferential direction. The positioning brackets include an arc-shaped part and straight rods respectively provided at the ends of the arc-shaped part. The two straight rods are parallel to each other, and the straight rods abut against one end of the magnet on the same side.

9. A vehicle motor according to claim 2 or 4, characterized in that: The end cover is provided with a rotating shaft sleeve, and the rotating shaft sleeve is coaxially provided with a rotating shaft cavity corresponding to the through hole. The output end is provided with a thread, and the rotating shaft cavity is connected to a reduction gear box. The reduction gear box is provided with a reduction gear, and part of the reduction gear is placed in the rotating shaft cavity and meshes with the thread of the output end.

10. A vehicle motor according to claim 9, characterized in that: A gap is provided between the output end and the inner wall of the rotating shaft cavity.

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