Motor cantilever supporting device

Abstract

The utility model discloses a motor cantilever supporting device which comprises a motor shaft, a motor shell and a supporting piece, the supporting piece is connected with the motor shell, a supporting bearing is arranged in the supporting piece, one end of the motor shaft is located in the motor shell, and the other end of the motor shaft extends into the supporting piece and is matched with the bearing. One end of the motor shaft is located in the motor shell and supported by the motor bearing in the motor shell, the other end of the motor shaft is supported by the supporting bearing in the supporting piece, and the small belt wheel on the motor shaft is located between the motor bearing and the supporting bearing, so that the rigidity of the motor shaft is greatly improved. The requirement for different assembly distances from the end face of the small belt wheel to the end face of the motor bearing can be met, the problem that motor torque transmission is unstable is effectively solved, the tooth skipping probability is reduced, product abnormal sounds are reduced, and the service life of products is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of steering gears, in particular to a motor cantilever supporting device. Background Art

[0002] REPS steering gear products have different requirements for the tension of the synchronous belt reduction mechanism to match different weight models. The synchronous belt reduction mechanism includes a motor assembly, a ball screw assembly, a large pulley, a small pulley, a synchronous belt and a tensioning wheel. The small pulley is sleeved on the outer peripheral wall of the motor shaft of the motor assembly, and the large pulley is sleeved on the outer peripheral wall of the screw of the ball screw assembly. The tension of the synchronous belt wound around the large pulley and the small pulley is adjusted by the tensioning wheel. At this time, the motor shaft of the motor assembly is only supported by the motor bearing. When the distance between the end face of the small pulley and the end face of the motor bearing is large, and the tensioning wheel adjusts the tension to a large extent, the front end of the motor shaft will produce a large deflection under the tension of the synchronous belt, resulting in unstable motor torque transmission, and prone to abnormal motor noise and synchronous belt tooth skipping. Utility Model Content

[0003] In view of the above problems, the utility model proposes a motor cantilever support device, by which the other end of the motor shaft is supported by a support bearing in a support member, so that the rigidity of the motor shaft is greatly improved.

[0004] The technical solution adopted by the utility model is as follows: a motor cantilever support device, including a motor shaft, a motor housing and a support member, the support member is connected to the motor housing, a support bearing is provided in the support member, one end of the motor shaft is located inside the motor housing, and the other end of the motor shaft extends to the inside of the support member and cooperates with the bearing.

[0005] Optionally, the support member includes a first support portion, a second support portion and a third support portion which are connected in sequence, the first support portion is connected to the motor housing, and the support bearing is provided inside the third support portion.

[0006] Optionally, an inner peripheral wall of the third support portion is provided with an annular groove, and the annular groove cooperates with the outer ring of the support bearing.

[0007] Optionally, the first support portion and the motor housing are both circumferentially provided with a plurality of screw holes for screws to pass through.

[0008] Optionally, the second supporting portion is provided with a channel for the synchronous belt to pass through.

[0009] Optionally, the first supporting portion, the second supporting portion, and the third supporting portion are an integrally formed structure.

[0010] Optionally, the first supporting portion and the second supporting portion are both semicircular structures.

[0011] Optionally, it further comprises a steering housing and an end cover housing, wherein one side of the steering housing is connected to the motor housing, and the other side of the steering housing is connected to the end cover housing.

[0012] Optionally, the inner wall of the end cover shell is provided with a groove that cooperates with the third supporting portion.

[0013] The beneficial effects of the utility model are as follows: one end of the motor shaft is located inside the motor housing and supported by the motor bearing inside the motor housing, the other end of the motor shaft is supported by the support bearing in the support member, and the small pulley on the motor shaft is located between the motor bearing and the support bearing, so that the rigidity of the motor shaft is greatly improved, and different assembly distance requirements from the end face of the small pulley to the end face of the motor bearing can be met, which effectively solves the problem of uneven torque transmission of the motor, reduces the probability of tooth jumping, reduces product abnormal noise, and increases product service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the synchronous belt speed reduction mechanism mentioned in the background technology;

[0015] Figure 2 A schematic diagram of a motor cantilever support device proposed in an embodiment of the utility model;

[0016] Figure 3 A schematic diagram of a support member of a motor cantilever support device according to an embodiment of the utility model;

[0017] Figure 4 A cross-sectional view of a motor cantilever support device proposed in an embodiment of the utility model.

[0018] The marks in the accompanying drawings are: 1. motor shaft; 2. motor housing; 21. motor bearing; 3. support member; 31. first support portion; 311. screw hole; 32. second support portion; 321. channel; 33. third support portion; 331. annular groove; 34. support bearing; 4. steering housing; 5. end cover housing; 51. groove; 6. ball screw assembly; 7. large pulley; 8. small pulley; 9. synchronous belt; 10. tensioning wheel. DETAILED DESCRIPTION

[0019] The utility model is described in detail below in conjunction with the accompanying drawings.

[0020] like Figures 2 to 4As shown, a motor cantilever support device includes a motor shaft 1, a motor housing 2 and a support member 3, wherein the support member 3 is connected to the motor housing 2, a support bearing 34 is arranged inside the support member 3, one end of the motor shaft 1 is located inside the motor housing 2, and the other end of the motor shaft 1 extends to the inside of the support member 3 and cooperates with the bearing. One end of the motor shaft 1 is located inside the motor housing 2 and supported by the motor bearing inside the motor housing 2, and the other end of the motor shaft 1 is supported by the support bearing 34 in the support member 3. The small pulley 8 on the motor shaft 1 is located between the motor bearing and the support bearing 34, so that the rigidity of the motor shaft 1 is greatly improved, and the requirements of different assembly distances from the end face of the small pulley 8 to the end face of the motor bearing can be met, which effectively solves the problem of unstable torque transmission of the motor, reduces the probability of tooth skipping, reduces abnormal noise of the product, and increases the service life of the product.

[0021] In this embodiment, if Figure 3 As shown, the support member 3 includes a first support portion 31, a second support portion 32 and a third support portion 33 connected in sequence, the first support portion 31 is connected to the motor housing 2, and the support bearing 34 is arranged inside the third support portion 33. The inner peripheral wall of the third support portion 33 is provided with an annular groove 331, and the annular groove 331 cooperates with the outer ring of the support bearing 34. The annular groove 331 limits the support bearing 34. The support bearing 34 and the end surface of the third support portion 33 are fixed by riveting.

[0022] In this embodiment, if Figure 3 As shown, the first support portion 31 and the motor housing 2 are both provided with a plurality of screw holes 311 for screws to pass through along the circumferential direction. The first support portion 31 and the motor housing 2 are connected by screws. The second support portion 32 is provided with a channel 321 for the synchronous belt 9 to pass through. The synchronous belt 9 passes through the channel 321 and cooperates with the large pulley 7. The first support portion 31, the second support portion 32, and the third support portion 33 can be an integrally formed structure.

[0023] In this embodiment, if Figure 3 As shown, the first support portion 31 and the second support portion 32 are both semicircular structures, thereby reducing the overall weight of the support member 3.

[0024] In this embodiment, if Figure 4 As shown, the motor housing 2 further includes a steering housing 4 and an end cover housing 5, one side of the steering housing 4 is connected to the motor housing 2, and the other side of the steering housing 4 is connected to the end cover housing 5. The steering housing 4 and the end cover housing 5 protect the support member 3. The inner wall of the end cover housing 5 is provided with a groove 51 that cooperates with the third support portion 33. The groove 51 supports the support member 3, further enhancing the rigidity of the motor shaft 1.

[0025] The above description is only a preferred embodiment of the utility model, and does not limit the patent protection scope of the utility model. Any equivalent structural transformation made using the contents of the utility model specification and drawings, directly or indirectly used in other related technical fields, is also included in the protection scope of the utility model.

Claims

1. A motor cantilever support device, characterized in that: It includes a motor shaft, a motor housing and a support member, wherein the support member is connected to the motor housing, a support bearing is arranged inside the support member, one end of the motor shaft is located inside the motor housing, and the other end of the motor shaft extends into the support member and cooperates with the bearing.

2. The motor cantilever support device according to claim 1, characterized in that: The support member includes a first support portion, a second support portion and a third support portion which are connected in sequence, the first support portion is connected to the motor housing, and the support bearing is disposed inside the third support portion.

3. The motor cantilever support device according to claim 2, characterized in that: An annular groove is provided on the inner peripheral wall of the third support portion, and the annular groove cooperates with the outer ring of the support bearing.

4. The motor cantilever support device according to claim 2, characterized in that: The first support portion and the motor housing are both circumferentially provided with a plurality of screw holes for screws to pass through.

5. The motor cantilever support device according to claim 2, characterized in that: The second supporting portion is provided with a channel for the synchronous belt to pass through.

6. The motor cantilever support device according to claim 2, characterized in that: The first supporting portion, the second supporting portion and the third supporting portion are an integrally formed structure.

7. The motor cantilever support device according to claim 2, characterized in that: The first supporting portion and the second supporting portion are both semicircular structures.

8. The motor cantilever support device according to claim 2, characterized in that: It also includes a steering housing and an end cover housing, one side of the steering housing is connected to the motor housing, and the other side of the steering housing is connected to the end cover housing.

9. The motor cantilever support device according to claim 8, characterized in that: The inner wall of the end cover shell is provided with a groove matched with the third supporting part.

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