Through shaft hub motor with rotation stopping structure

Abstract

The utility model relates to a through shaft hub motor with a rotation stopping structure, which comprises a through shaft, a connecting frame and a hub motor, the through shaft is a hollow shaft body and is fixed on the connecting frame through a through shaft rod, one end of the through shaft rod is respectively connected with a fixing plate of the connecting frame through threads, and the connecting frame is used for providing installation support for the through shaft. A wheel can be mounted on a hub ring of the hub motor; a first rotation stopping block and a second rotation stopping block are arranged at the two ends of the through shaft respectively, and the first rotation stopping block and the second rotation stopping block are connected with the two ends of the through shaft through spline structures respectively; and a first mounting hole and a second mounting hole which can be matched with the first rotation stopping block and the second rotation stopping block are formed in the fixing plates on the two sides of the connecting frame correspondingly. The through shaft is connected with the connecting frame in a two-end rotation stopping mode, and work is stable and reliable; the two rotation stopping blocks and the through shaft are designed in a split mode, mounting and dismounting are more convenient, connection is firmer through a spline structure, the split structure is easy to machine, cost is low, and dismounting and mounting efficiency is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric power-assisted bicycles, and in particular relates to a through-axle hub motor with a rotation-stop structure. Background Art

[0002] With the development of hub motors, through-axle hub motors are increasingly being used in electric-powered bicycles. Their quick installation and removal have made them a favorite among electric bicycle manufacturers. The structural characteristics of a through-axle hub motor are that the main shaft is a hollow cylindrical shaft. The motor's stator and rotor, planetary reduction mechanism, clutch, motor housing, and base are assembled in sequence to form a motor. This motor is then connected to the connecting frames on both sides of the electric-powered bicycle via a quick-release shaft. A raised block is added to one side of the through-axle to prevent rotation. The through-axle and connecting frame must remain relatively stationary for the motor to generate power and propel the vehicle forward. However, these through-axle hub motors currently face the following problems in practical applications: The through-axle and connecting frame are prone to relative slippage, causing the motor to idle and become unable to move forward, creating a dangerous situation. Furthermore, the raised block on the through-axle can only prevent rotation on one side, not both sides, and the manufacturing cost is high. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the utility model provides a through-shaft hub motor with a rotation-stopping structure, which has the effect of stopping rotation at both ends and the through-shaft is not easy to slip.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] A through-axle hub motor with a rotation-stopping structure comprises:

[0006] A through shaft, with a first stop block and a second stop block respectively provided at both ends of the through shaft, the first stop block and the second stop block being connected to both ends of the through shaft respectively using a spline structure;

[0007] A connecting frame, wherein the fixing plates on both sides of the connecting frame are respectively provided with a first mounting hole and a second mounting hole capable of cooperating with the first anti-rotation block and the second anti-rotation block;

[0008] A hub motor is installed on a through shaft. A base for installing a flywheel is provided on one side of the hub motor. A connecting flange is provided on one side of the base. The flange has a through hole. The base is connected to the hub ring of the hub motor via the connecting flange.

[0009] Preferably, the spline structure includes internal spline holes on the first and second stop blocks and external spline tooth grooves at both ends of the through shaft.

[0010] Preferably, the spline structure includes stop groove holes on the first stop block and the second stop block and stop tooth grooves at both ends of the through shaft.

[0011] Preferably, both ends of the card base are connected to the through shaft by means of bearings.

[0012] Preferably, a bearing hole for mounting the second bearing is provided at one end of the card base, and a retaining ring and a skeleton sealing ring for fixing the third bearing are provided in the housing hole at the other end of the card base.

[0013] Preferably, a motor harness fixing block is provided on the outer side of the end cover of the hub motor, and a threading hole is provided on the motor harness fixing block.

[0014] Preferably, the first anti-rotation block and the second anti-rotation block are both orifice plates with limiting corners.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The through shaft of the utility model is connected to the connecting frame by a rotation-stopping method at both ends, and the operation is stable and reliable; the two rotation-stopping blocks are designed as a split part from the through shaft, which makes installation and disassembly more convenient, and the connection is made firmer by a spline structure; the split structure is easy to process, with low cost and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is a schematic structural diagram of the card base part of the utility model.

[0019] Figure 3 This is a schematic structural diagram of the connecting frame of the present invention.

[0020] Figure 4 This is a schematic diagram of the through-shaft structure of the present utility model.

[0021] Figure 5 This is a schematic structural diagram of the first anti-rotation block of the utility model.

[0022] Figure 6 for Figure 1 A in the enlarged view.

[0023] In the figure: 1. through-shaft rod; 2. first anti-rotation block; 3. connecting frame; 4. motor harness fixing block; 5. skeleton sealing ring; 6. motor disc brake; 7. motor end cover; 8. stator wire package; 9. rotor assembly; 10. planetary reduction mechanism; 11. hub ring; 12. clutch; 13. card base; 14. flywheel; 15. fixing plate; 16. through-shaft; 17. second anti-rotation block; 18. threading hole; 19. first bearing positioning block; 20. first bearing; 21. hub motor; 22. second bearing; 2201, second bearing hole; 23. card base connecting flange; 24. card base housing; 25. card base ball stopper; 26. third bearing; 2601, third bearing hole; 27. skeleton sealing ring; 28. first mounting hole; 29. ​​second mounting hole; 30. external spline; 31. internal spline tooth slot hole; 32. limiting edge. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0025] This embodiment provides a through-axle hub motor with a rotation-stop structure, including a through-axle 16, a connecting frame 3, and a right and right hub motor 21. The through-axle 16 is a hollow shaft body, and is fixed to the fixing plates 15 on both sides of the connecting frame 3 by a first rotation-stop block 2 and a second rotation-stop block 17 respectively. The connecting frame 3 is used to connect to the vehicle body.

[0026] A through-shaft rod 1 is provided in the through-shaft 16, one end of which is connected to a fixing plate 15 by a threaded connection. The connecting frame 3 is used to provide mounting support for the through-shaft 16. A wheel can be mounted on the hub ring 11 of the hub motor 21. The through-shaft 16 provides mounting support for the hub motor 21. The hub motor 16 includes components such as a stator coil 8, a rotor assembly 9, a planetary reduction mechanism 10, and a clutch 12, which are sequentially assembled on the through-shaft 16.

[0027] like Figures 1-6 As shown, a through shaft 16 is provided with a first stop block 2 and a second stop block 17 at both ends of the through shaft 16, respectively. The first stop block 2 and the second stop block 17 are connected to the two ends of the through shaft 16 by a spline structure. The spline structure makes the two ends of the through shaft 16 radially fixed to the first stop block 2 and the second stop block 17, and does not produce radial rotation, thereby ensuring that the hub motor 21 works normally on the through shaft 16.

[0028] The connecting frame 3 has a first mounting hole 28 and a second mounting hole 29 respectively formed on the fixing plates 15 on both sides of the connecting frame 3, which can cooperate with the first stop block 2 and the second stop block 17; the two ends of the through shaft 16 are fixedly connected to the connecting frame 3 through the first stop block 2 and the second stop block 17 respectively, and will not rotate;

[0029] The hub motor 21 is installed on the through shaft 16. A base 13 for installing the flywheel 14 is provided on one side of the hub motor 21. A connecting flange 23 is provided on one side of the base 13. The base 13 is connected to the hub ring 11 of the hub motor 21 using the connecting flange 23. The flange connection form is convenient for installation and disassembly. When the hub motor 21 is working, the hub ring 11 can drive the base 13 to rotate.

[0030] Furthermore, the spline structure includes an internal spline hole 31 arranged on the first stop block 2 and the second stop block 17 and an external spline tooth 30 arranged at both ends of the through shaft 16. The first stop block 2 and the second stop block 17 have the same structure; the spline types include ISIS spline, rectangular spline, involute spline, etc.

[0031] Furthermore, both ends of the card base 13 are connected to the through shaft 16 by means of a second bearing 22 and a third bearing 26 , respectively. The third bearing 26 inside the card base 13 ensures that the card base rotates stably on the through shaft 16 .

[0032] Furthermore, a bearing hole 2201 for mounting the second bearing 22 is provided at one end of the card base 13, and a retaining ring 25 and a skeleton sealing ring 27 for fixing the third bearing 26 are provided in the housing hole 2601 at the other end of the card base 13. The retaining ring 25 limits the axial movement of the third bearing 26, and the skeleton sealing ring 27 contacts the surface of the through shaft 16 to play a role in waterproofing and dustproofing.

[0033] Furthermore, a motor harness fixing block 4 is provided on the outer side of the end cover 7 of the hub motor 21 , and a wire threading hole 18 is opened on the motor harness fixing block 4 .

[0034] Furthermore, the first anti-rotation block 2 and the second anti-rotation block 17 are both orifice plates with limiting corners 32, and the first mounting hole 28 and the second mounting hole 29 correspond thereto, respectively, to prevent radial rotation.

[0035] Furthermore, a first bearing 20 is provided between the motor harness fixing block 4 and the end cover 7 , and a sealing ring 5 is provided on the end cover 7 outside the first bearing 20 .

[0036] Working principle: The two ends of the through shaft 16 of the utility model are connected with the first stop block 2 and the second stop block 17 through a spline structure. The first stop block 2 and the second stop block 17 are fixedly connected to the fixed plates 15 on both sides of the connecting frame 3. The first stop block 2 and the second stop block 17 cannot rotate radially, that is, the through shaft 16 cannot rotate radially, thereby ensuring that the hub motor 21 works normally on the through shaft 16; the spline structure connection form makes the external spline teeth at both ends of the through shaft 16 mesh with the teeth on the inner spline holes of the first stop block 2 and the second stop block 17, radially fixed, with high connection strength, and the split structure is easy to process, install and disassemble.

[0037] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A through-axle hub motor with a rotation-stopping structure, comprising: A through shaft, with a first stop block and a second stop block respectively provided at both ends of the through shaft, the first stop block and the second stop block being connected to both ends of the through shaft respectively using a spline structure; A connecting frame, wherein the fixing plates on both sides of the connecting frame are respectively provided with a first mounting hole and a second mounting hole capable of cooperating with the first anti-rotation block and the second anti-rotation block; A hub motor is installed on a through shaft. A base for installing a flywheel is provided on one side of the hub motor. A connecting flange is provided on one side of the base. The flange has a through hole. The base is connected to the hub ring of the hub motor via the connecting flange.

2. The through-axle hub motor with a rotation-stopping structure according to claim 1, characterized in that: The spline structure includes internal spline holes on the first and second anti-rotation blocks and external spline tooth grooves at both ends of the through shaft.

3. The through-axle hub motor with a rotation-stopping structure according to claim 1, characterized in that: The two ends of the card base are connected to the through shaft by using bearings respectively.

4. The through-axle hub motor with a rotation-stopping structure according to claim 3 is characterized in that: A bearing hole for mounting the second bearing is provided at one end of the card base, and a retaining ring and a skeleton sealing ring for fixing the third bearing are provided in the housing hole at the other end of the card base.

5. The through-axle hub motor with a rotation-stopping structure according to claim 1, characterized in that: A motor harness fixing block is provided on the outer side of the end cover of the hub motor, and a threading hole is provided on the motor harness fixing block.

6. The through-axle hub motor with a rotation-stopping structure according to claim 1, characterized in that: The first anti-rotation block and the second anti-rotation block are both orifice plates with limiting corners.

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