Motor capable of preventing axial movement

Abstract

The utility model relates to the technical field of motors, in particular to a motor capable of preventing axial movement. A first bearing is mounted on a shaft neck at one end of the worm shaft, a second bearing is mounted on a shaft neck at the other end of the worm shaft, and at least one first belleville spring is arranged on a shaft body of the worm shaft between the first bearing and the worm teeth in a sleeving manner; a front end bearing is installed on one shaft neck of the rotating shaft, a rear end bearing is installed on the other shaft neck of the rotating shaft, at least one second belleville spring is sleeved on a shaft body of the rotating shaft between the rear end bearing and a commutator in the motor, and at least one third belleville spring is arranged between the front end bearing and a motor shell. The axial pre-tightening force is improved, the accumulated tolerance and the bearing clearance generated after the components are assembled are eliminated, the displacement of the rotating shaft and the worm in the operation process is prevented, and the axial impact force borne by the motor is effectively overcome. The locking gasket and the locking screw act together to provide a reverse buffering force when the motor is in place so as to solve the abnormal sound in place in the whole motor operation process, especially when the motor is started and stopped.

Description

Technical Field

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

[0002] With the development of society, people's requirements for vehicle functions are gradually increasing. To facilitate people getting on and off the vehicle, vehicle pedals are installed on both sides of the vehicle body. The pedal motor is the brain of the entire pedal, used to control the normal operation of the pedal and realize the extension and retraction of the pedal.

[0003] The motor has relatively high requirements for the size, position accuracy and process of parts, which will increase the cost; if there is a certain clearance between components, defects such as axial displacement will occur, resulting in abnormal noises when the entire motor reaches the position, starts, and / or during the process. Especially under a large axial impact force, it greatly affects the service life of the motor. Summary of the Invention

[0004] The technical problem to be solved by the utility model is: to solve the problems existing in the prior art in the above background art, and provide a motor for preventing axial displacement that reduces the clearance between components, improves the axial preloading force, effectively solves the abnormal noise of the entire motor, and extends the service life of the motor.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a motor for preventing axial displacement, including a reducer and a motor. A reducer is installed on one side of the motor to drive the reducer to rotate;

[0006] The reducer includes a reduction box. A worm is installed in the inner cavity of the reduction box. The worm includes a worm shaft and worm teeth. Worm teeth are provided on the shaft body of the worm shaft. A first bearing is installed on the shaft neck at one end of the worm shaft, and a second bearing is installed on the shaft neck at the other end of the worm shaft. At least one first disc spring is sleeved on the worm shaft between the first bearing and the worm teeth;

[0007] The motor includes a motor housing. A rotating shaft is installed in the inner cavity of the motor housing. A front-end bearing is installed on one shaft neck of the rotating shaft, and a rear-end bearing is installed on the other shaft neck of the rotating shaft. At least one second disc spring is sleeved on the rotating shaft between the rear-end bearing and the commutator in the motor, and at least one third disc spring is provided between the front-end bearing and the motor housing.

[0008] Further, a locking washer is installed on one thrust surface of the worm shaft and locked by a locking screw.

[0009] Further, the number of the first disc springs is 2, and the two first disc springs are arranged in an interlocking manner.

[0010] Furthermore, the number of the second disc springs is two, and the two second disc springs are interlocked.

[0011] Furthermore, the number of the third disc spring is one, and the inner groove surface of the third disc spring faces the front end bearing or faces away from the front end bearing.

[0012] Furthermore, the reducer also includes an output shaft, the end of the output shaft extending into the reduction box is equipped with a worm wheel, the worm wheel is meshed with the worm, the other end of the output shaft is connected to the pedal, and a gear is installed on the shaft body of the worm shaft of the worm.

[0013] Furthermore, a rotor and a commutator are installed on the shaft body of the rotating shaft between the front end bearing and the rear end bearing, and a tooth portion is also provided on the shaft body of the rotating shaft, and the tooth portion is meshed with a gear in the reducer.

[0014] Furthermore, the central axis of the rotating shaft and the central axis of the output shaft are arranged in parallel.

[0015] Furthermore, a groove is provided on the inner wall of the reduction box, the groove is arranged close to the gear, a retaining spring is installed in the groove, and the retaining spring is tightly attached to the outer end surface of the second bearing.

[0016] Furthermore, a gasket is provided between the front end bearing and the third disc spring, and a gasket is installed on one side of the second disc spring, and the gasket is arranged close to the commutator.

[0017] Beneficial effects of the utility model: the utility model installs a first disc spring on the shaft body of the worm shaft between the first bearing and the worm gear, a second disc spring on the shaft body of the rotating shaft between the rear end bearing and the commutator in the motor, and a third disc spring between the front end bearing and the motor housing;

[0018] Improve the axial preload, eliminate the accumulated tolerance and bearing clearance between the components after assembly, prevent the shaft and worm from moving during operation, and effectively overcome the axial impact force on the motor;

[0019] At the same time, the locking washer and the locking screw work together to provide a buffer force in the opposite direction when in place, so as to solve the abnormal noise during the entire motor operation process, especially when the motor starts and stops. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the utility model after the reduction box and the motor housing are removed;

[0023] Figure 3 It is a schematic structural view of another direction after removing the speed reducer and the motor housing of the present utility model;

[0024] In the figure: 1. Speed reducer, 2. Worm, 3. Worm shaft, 4. Worm teeth, 5. First bearing, 6. First disc spring, 7. Locking gasket, 8. Locking screw, 9. Rotating shaft, 10. Front end bearing, 11. Rear end bearing, 12. Commutator, 13. Second disc spring, 14. Motor housing, 15. Third disc spring, 16. Output shaft, 17. Worm gear, 18. Gear, 19. Tooth part, 20. Rotor, 22. Snap ring, 23. Second bearing. Specific embodiments

[0025] Now, the present utility model will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic views, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0026] Embodiment 1:

[0027] As Figures 1 to 3 shown, a motor for preventing axial movement, taking the motor of an automotive automatic retractable pedal as an example, includes a speed reducer and a motor. A speed reducer is installed on one side of the motor to drive the speed reducer to rotate;

[0028] The speed reducer includes a speed reduction box 1. A worm 2 is installed in the inner cavity of the speed reduction box 1. The worm 2 includes a worm shaft 3 and worm teeth 4. Worm teeth 4 are provided on the shaft body of the worm shaft 3. A first bearing 5 is installed on the shaft neck at one end of the worm shaft 3, and a second bearing 23 is installed on the shaft neck at the other end of the worm shaft 3. At least one first disc spring 6 is sleeved on the shaft body of the worm shaft 3 between the first bearing 5 and the worm teeth 4. The number of the first disc springs 6 is 2, and the two first disc springs 6 are arranged in an interlocking manner. In addition, a locking gasket 7 is installed on a thrust surface of the worm shaft 3 and locked by a locking screw 8. The locking gasket 7 and the locking screw 8 are arranged close to the second bearing 23. The locking gasket 7 and the locking screw 8 act together to give a buffer force in the reverse direction when in place, so as to solve the in-place abnormal noise during the operation of the whole motor, especially when the motor starts and stops;

[0029] The motor includes a motor housing 14. A rotating shaft 9 is installed in the inner cavity of the motor housing 14. A front end bearing 10 is installed on a shaft neck of the rotating shaft 9, and a rear end bearing 11 is installed on the other shaft neck of the rotating shaft 9. At least one second disc spring 13 is sleeved on the shaft body of the rotating shaft 9 between the rear end bearing 11 and the commutator 12 in the motor. The number of the second disc springs 13 is 2, and the two second disc springs 13 are arranged in an interlocking manner;

[0030] There is at least one third disc spring 15 provided between the front-end bearing 10 and the motor housing 14. The number of the third disc springs 15 is 1, and the inner groove surface of the third disc spring 15 faces away from the front-end bearing 10.

[0031] As Figure 3 shown, the number of the first disc springs 6 is 2, and the two first disc springs 6 are interlocked with each other.

[0032] The number of the second disc springs 13 is 2, and the two second disc springs 13 are interlocked with each other.

[0033] The number of the third disc springs 15 is 1, and the inner groove surface of the third disc spring 15 faces towards the front-end bearing 10 or away from the front-end bearing 10.

[0034] As Figure 2 shown, the speed reducer further includes an output shaft 16. A worm gear 17 is installed at the end of the output shaft 16 extending into the speed reduction box 1. The worm gear 17 meshes with the worm 2. The other end of the output shaft 16 is connected to a pedal, and a gear 18 is installed on the shaft body of the worm shaft 3 of the worm 2.

[0035] As Figure 2 shown, a rotor 20 and a commutator 12 are installed on the shaft body of the rotating shaft 9 between the front-end bearing 10 and the rear-end bearing 11. A tooth portion 19 is further provided on the shaft body of the rotating shaft 9, and the tooth portion 19 is meshed with the gear 18 in the speed reducer.

[0036] The central axis of the shaft 9 is parallel to the central axis of the output shaft 16.

[0037] As Figure 3 shown, a groove is formed on the inner wall of the speed reduction box 1. The groove is arranged close to the gear 18. A snap ring 22 is installed in the groove, and the snap ring 22 is in close contact with the outer end face of the second bearing 23.

[0038] In addition, a gasket is provided between the front-end bearing 10 and the third disc spring 15, and a gasket is installed on one side of the second disc spring 13. The gasket is arranged close to the commutator 12.

[0039] Working process:

[0040] Step 1: The motor starts, driving the rotating shaft 9 to rotate. The tooth portion 19 on the rotating shaft 9 meshes with the gear 18, thereby driving the gear 18 to rotate.

[0041] Step 2: The gear 18 is installed on the worm 2, driving the worm 2 to rotate simultaneously.

[0042] Step 3: The worm 2 rotates, driving the worm gear 17 meshing with it to rotate, thereby driving the output shaft 16 to rotate, and finally driving the pedal installed on the output shaft 16 to move, realizing the extension and retraction of the pedal.

[0043] Among them, during use, the first conical spring 6, the second conical spring 13, and the third conical spring 15 are compressed, thereby eliminating the axial cumulative tolerance of the rotating shaft 9 and the worm 2 and the bearing clearance, and providing axial preloading force for the front-end bearing 10 and the rear-end bearing 11, the first bearing 5 and the second bearing 23;

[0044] When the rotor and the worm 2 are subjected to an upward axial impact force, due to the elastic force of the conical spring being much greater than the axial impact force, the conical spring undergoes a slight deformation, and the impact force is overcome;

[0045] When the rotor and the worm 2 are subjected to a downward axial impact force, since the front-end bearing 10 and the housing bearing chamber, the second bearing 23 and the reduction gearbox 1 are hard supports, neither the rotor nor the worm 2 will undergo axial movement. Thus, the impact forces in both directions are overcome.

[0046] Embodiment 2:

[0047] The difference from Embodiment 1 is that: the number of the first conical springs 6 is 2, and they are arranged in an interlocking manner; the number of the second conical springs 13 is 2, and they are arranged in an interlocking manner; the number of the third conical springs 15 is 1, and the concave surface faces outward.

[0048] Embodiment 3:

[0049] The difference from Embodiment 1 is that: the number of the first conical springs 6 is 1, and the concave surface faces inward; the number of the second conical springs 13 is 1, and the concave surface faces inward; the number of the third conical springs 15 is 1, and the concave surface faces inward.

[0050] Embodiment 4:

[0051] The difference from Embodiment 1 is that: the number of the first conical springs 6 is 1, and the concave surface faces outward; the number of the second conical springs 13 is 1, and the concave surface faces outward; the number of the third conical springs 15 is 1, and the concave surface faces outward.

[0052] Embodiment 5:

[0053] The difference from Embodiment 1 is that: the number of the first conical springs 6 is 1, and the concave surface faces inward; the number of the second conical springs 13 is 1, and the concave surface faces outward; the number of the third conical springs 15 is 1, and the concave surface faces inward.

[0054] Embodiment 6:

[0055] The difference from Embodiment 1 is that: the number of the first conical springs 6 is 1, and the concave surface faces inward; the number of the second conical springs 13 is 1, and the concave surface faces inward; the number of the third conical springs 15 is 1, and the concave surface faces outward.

[0056] Inspired by the above ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present utility model. The technical scope of the present utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A motor with anti-axial movement, characterized in that: It includes a reducer and a motor, wherein the reducer is installed on one side of the motor to drive the reducer to rotate; The reducer comprises a reduction box (1), a worm (2) is installed in the inner cavity of the reduction box (1), the worm (2) comprises a worm shaft (3) and worm teeth (4), the shaft body of the worm shaft (3) is provided with worm teeth (4), a first bearing (5) is installed on the shaft neck at one end of the worm shaft (3), a second bearing (23) is installed on the shaft neck at the other end of the worm shaft (3), and at least one first disc spring (6) is sleeved on the shaft body of the worm shaft (3) between the first bearing (5) and the worm teeth (4); The motor comprises a motor housing (14), a rotating shaft (9) is installed in the inner cavity of the motor housing (14), a front end bearing (10) is installed on one shaft neck of the rotating shaft (9), a rear end bearing (11) is installed on the other shaft neck of the rotating shaft (9), at least one second disc spring (13) is sleeved on the shaft body of the rotating shaft (9) between the rear end bearing (11) and a commutator (12) in the motor, at least one third disc spring (15) is provided between the front end bearing (10) and the motor housing (14), and a locking washer (7) is installed on a thrust surface of the worm shaft (3) and is locked by a locking screw (8).

2. The motor with anti-axial movement according to claim 1, characterized in that: The number of the first disc springs (6) is two, and the two first disc springs (6) are interlocked.

3. The motor with anti-axial movement according to claim 1, characterized in that: The number of the second disc springs (13) is two, and the two second disc springs (13) are interlocked.

4. The motor with anti-axial movement according to claim 1, characterized in that: The number of the third disc spring (15) is one, and the inner groove surface of the third disc spring (15) faces the front end bearing (10) or faces away from the front end bearing (10).

5. The motor with anti-axial movement according to claim 1, characterized in that: The reducer also includes an output shaft (16), the end of the output shaft (16) extending into the reduction box (1) is equipped with a worm gear (17), the worm gear (17) is meshed with the worm (2), the other end of the output shaft (16) is connected to the pedal, and a gear (18) is installed on the shaft body of the worm shaft (3) of the worm (2).

6. The motor with anti-axial movement according to claim 1, characterized in that: A rotor (20) and a commutator (12) are mounted on the shaft of the rotating shaft (9) between the front end bearing (10) and the rear end bearing (11). A tooth portion (19) is also provided on the shaft of the rotating shaft (9). The tooth portion (19) is meshed with a gear (18) in the reducer.

7. The motor with anti-axial movement according to claim 1, characterized in that: The central axis of the rotating shaft (9) and the central axis of the output shaft (16) are arranged in parallel.

8. The motor with anti-axial movement according to claim 1, characterized in that: A groove is provided on the inner wall of the reduction box (1), the groove is arranged close to the gear (18), a retaining ring (22) is installed in the groove, and the retaining ring (22) is closely attached to the outer end surface of the second bearing (23).

9. The motor with anti-axial movement according to claim 1, characterized in that: A gasket is provided between the front end bearing (10) and the third disc spring (15), and a gasket is installed on one side of the second disc spring (13), and the gasket is arranged close to the commutator (12).

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