Motor shaft anti-rotation structure

Abstract

A motor shaft anti-rotation structure includes a hook, an anti-rotation anti-slip sheet and a motor shaft, wherein the anti-rotation anti-slip sheet is connected to the hook, and the anti-rotation anti-slip sheet includes an anti-rotation hole, a positioning fulcrum and a limit fulcrum, and is characterized in that: a anti-rotation hole matching the shape of the motor shaft is provided in the center of the anti-rotation anti-slip sheet, and a thread matching the motor shaft is provided on the inner side of the anti-rotation hole. Through the cooperation of the hook, the anti-rotation anti-slip sheet and the motor shaft, the motor shaft is stably fixed and effectively stopped, the motor is prevented from falling off and the motor shaft is loosened, and the riding safety and stability are improved. A locking point is set on the outer edge of the anti-rotation hole, and by knocking the locking point, the inner diameter of the anti-rotation hole is made smaller than the original inner diameter of the anti-rotation hole, which further increases the stability of the motor shaft, prevents it from loosening during use, and prevents the motor shaft from falling off.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power-assisted bicycles, in particular to a motor shaft anti-rotation structure. Background Art

[0002] An electric power-assisted bicycle is a personal transportation tool that is based on an ordinary bicycle and is equipped with a motor, controller and other components, and uses batteries as auxiliary energy. When using an electric power-assisted bicycle, the rider still rides the bicycle in the same way as a traditional bicycle, and the motor provides assistance. At the same time, the size of the motor's assistance can be automatically adjusted by the controller according to the rider's riding conditions.

[0003] There are many configurations for the power system of electric power-assisted bicycles, one of which is to set the motor at the hub of the front and rear wheels to provide power to the bicycle when needed. The advantage of this electric power-assisted bicycle is that its power directly acts on the bicycle wheels, which is highly efficient and compact.

[0004] In the prior art, electric power-assisted bicycles still use the hooks of traditional bicycles, but the strength of the hooks of ordinary bicycles cannot fully guarantee riding safety, and there are risks of motor falling off and motor shaft loosening. Utility Model Content

[0005] In view of the problems in the related art, the utility model discloses a motor shaft anti-rotation structure, which solves the hidden dangers of motor falling off and motor shaft loosening in the electric power-assisted bicycle in the related art.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A motor shaft anti-rotation structure comprises a hook claw, an anti-rotation anti-slip plate and a motor shaft, wherein the anti-rotation anti-slip plate is connected to the hook claw, and the anti-rotation anti-slip plate comprises an anti-rotation hole, a positioning fulcrum and a limiting fulcrum, and is characterized in that a anti-rotation hole matching the shape of the motor shaft is provided in the center of the anti-rotation anti-slip plate, and a thread matching the motor shaft is provided on the inner side of the anti-rotation hole.

[0008] As a further solution of the utility model: a plurality of locking points are arranged on the outer edge of the anti-rotation hole, and the locking points are raised along one side of the inner diameter of the anti-rotation hole. The arrangement of the locking points can further increase the stability of the motor shaft and prevent it from loosening during use.

[0009] As a further solution of the utility model: three locking points are evenly arranged along the circumference of the outer side of the anti-rotation hole.

[0010] As a further solution of the utility model: the inner diameter at the locking point is smaller than the inner diameter of the anti-rotation hole.

[0011] As a further solution of the utility model: the locking point is set to be a triangle, and the bottom side of the triangle is directly opposite to the anti-rotation hole. This not only increases the stability of the locking point, but also enables the locking point to better fit the surface of the motor shaft, further preventing the motor shaft from loosening.

[0012] As a further solution of the utility model: the anti-rotation and anti-dropping piece is tightly attached to the outer side of the hook claw and the anti-rotation hole corresponds to the motor shaft installation groove.

[0013] As a further solution of the utility model: positioning fulcrums and limit fulcrums are dispersedly provided on the side edges of the anti-rotation and anti-slipping piece, a positioning groove is provided on the outer side of the hook claw, a motor shaft mounting groove is provided on the bottom of the hook claw, the positioning fulcrum is inserted into the positioning groove, and the limit fulcrum is clamped in the motor shaft mounting groove, so that the anti-rotation and anti-slipping piece can be stably installed on the hook claw and can effectively fix the motor shaft.

[0014] As a further solution of the utility model: the positioning support point (21) is configured as a cylindrical shape, and the limiting support point (22) is configured as an arc strip shape.

[0015] By adopting the above technical solution, the coordination of the hook claw, the anti-rotation anti-drop plate and the motor shaft can achieve stable fixation and effective anti-rotation of the motor shaft, thus preventing the motor from falling off and the motor shaft from loosening, and improving the safety and stability of riding.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The setting of the positioning fulcrum and the limit fulcrum can ensure the stable installation of the anti-rotation anti-drop plate on the hook claw, prevent the motor from falling off, and improve the safety of riding.

[0018] 2. A thread is set inside the stop hole, and a locking point is set on the outer edge of the stop hole. By tapping the locking point, the inner diameter of the stop hole is made smaller than the original inner diameter of the stop hole, which further increases the stability of the motor shaft and prevents it from loosening during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0020] In the attached picture:

[0021] Figure 1 It is a front view structural schematic diagram of the motor shaft anti-rotation structure.

[0022] Figure 2 It is a schematic diagram of the top view of the anti-rotation and anti-slip plate.

[0023] Figure 3 It is a side view schematic diagram of the motor shaft anti-rotation and anti-slip plate.

[0024] Reference numerals:

[0025] 1. Hook; 11. Positioning groove; 12. Motor shaft mounting groove; 2. Anti-rotation and anti-slip plate; 20. Anti-rotation hole; 201. Locking point; 21. Positioning fulcrum; 22. Limit fulcrum; 3. Motor shaft. DETAILED DESCRIPTION

[0026] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present embodiment disclosure as detailed in the appended claims.

[0027] It should be noted that all directional indications in the embodiments (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, the descriptions of "first", "second", etc. in the embodiments are only for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0030] like Figures 1 to 3 As shown, a motor shaft anti-rotation structure is provided, including a hook 1, an anti-rotation anti-slip plate 2 and a motor shaft 3. The hook 1 is welded to the middle frame of the vehicle and installed on the side of the rear wheel. The motor shaft 3 is installed and fixed. The motor is fixedly installed at the center of the hub of the rear wheel. When the motor is running, it drives the rear wheel to rotate.

[0031] Preferably, a motor shaft mounting groove 12 with an opening facing downward is provided at the bottom of the hook 1 to facilitate the installation of the motor shaft.

[0032] Preferably, a stop hole 20 is opened in the center of the anti-rotation and anti-slip plate 2, and the stop hole 20 is used to stop the motor shaft. A thread matching the motor shaft is provided in the stop hole 20, so that the motor shaft can be tightly fixed in the stop hole 20 to achieve stable operation of the motor.

[0033] Preferably, three locking points 201 are further provided on the outside of the stop hole 20. The locking points 201 are triangular in shape, and the base of the triangle is opposite to the inner diameter of the stop hole 20. When the locking points 201 are tapped, the inner diameter of the stop hole 20 is smaller than the original inner diameter of the stop hole 20, thereby further stopping the motor shaft 3 from rotating and preventing it from falling off, effectively preventing the motor from falling off and the motor shaft from loosening or even falling off, thereby ensuring riding safety.

[0034] Preferably, a raised positioning fulcrum 21 and a limit fulcrum 22 are provided on the edge of the anti-rotation and anti-slip plate 2, and a positioning groove 11 is opened on the side of the hook 1, which matches the positioning fulcrum 21 of the anti-rotation and anti-slip plate 2, which not only ensures the stable installation of the anti-rotation and anti-slip plate 2 on the hook 1, but also effectively prevents the motor from falling off. The limit fulcrum 22 of the anti-rotation and anti-slip plate 2 is clamped in the motor shaft mounting groove, further fixing the anti-rotation and anti-slip plate to prevent it from moving during use.

[0035] In other optional embodiments, a raised structure may be provided at the bottom of the hook 1, and a corresponding through hole may be opened at the top of the anti-rotation and anti-slip plate 2. The through hole at the top of the anti-rotation and anti-slip plate 2 is matched with the raised structure of the hook 1, and the raised structure is inserted into the corresponding through hole to firmly connect the anti-rotation and anti-slip plate 2 and the hook 1.

[0036] In other optional embodiments, a limiting slot structure can be provided on the hook 1, and the limiting slot structure can be V-shaped or U-shaped. A corresponding limiting protrusion structure is provided on the corresponding surface of the anti-rotation and anti-slip plate 2. The limiting protrusion structure is matched with the limiting slot structure, and the limiting protrusion structure can be an inverted T-shape. The limiting protrusion structure is inserted into the limiting slot to achieve a stable connection between the anti-rotation and anti-slip plate 2 and the hook 1, which is convenient for disassembly and assembly and maintenance.

[0037] In actual application, the hook 1 is first welded to the middle frame of the vehicle and installed on the side of the rear wheel. Then, the motor is fixedly installed at the center of the hub of the rear wheel, ensuring that the motor shaft 3 corresponds to the motor shaft mounting groove 12 at the bottom of the hook 1. Next, the anti-rotation and anti-slip sheet 2 is tightly attached to the outside of the hook 1, so that the anti-rotation hole 20 is aligned with the motor shaft mounting groove 12. The positioning fulcrum 21 is inserted into the positioning groove 11 on the outside of the hook, and the limit fulcrum 22 is clamped in the motor shaft mounting groove 12 to complete the installation of the anti-rotation and anti-slip sheet 2. Insert the motor shaft 3 into the stop hole 20, and rotate the motor shaft 3 to match the thread inside the stop hole 20. Three locking points 201 are evenly arranged along the circumference of the outside of the stop hole 20. The inner diameter of the locking point 201 is smaller than the inner diameter of the stop hole 20. The locking point 201 is knocked to make the inner diameter of the stop hole 20 after the knocking smaller than the original inner diameter of the stop hole 20, so that only the motor shaft thread can be bitten, effectively increasing the friction between the threads, completing the installation of the motor shaft, avoiding the motor shaft from loosening, and improving the anti-loosening effect. During use, the motor shaft 3 is stably fixed by the anti-slip sheet 2 and the locking effect of the locking point 201 while driving the rear wheel to rotate, which can effectively prevent the motor from falling off and the motor shaft from loosening. At the same time, the design of the positioning fulcrum 21 and the limiting fulcrum 22 ensures that the anti-slip sheet 2 can be stably installed on the hook 1, further improving the stability of the entire structure, preventing the motor from falling off, and ensuring riding safety.

[0038] Finally, it should be noted that the above disclosure is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model. The scope of this application is limited only by the attached claims.

Claims

1. A motor shaft anti-rotation structure, comprising a hook (1), an anti-rotation anti-slip sheet (2) and a motor shaft (3), wherein the anti-rotation anti-slip sheet (2) is connected to the hook (1), and the anti-rotation anti-slip sheet (2) comprises an anti-rotation hole (20), a positioning fulcrum (21) and a limit fulcrum (22), characterized in that: A rotation-stop hole (20) matching the shape of the motor shaft (3) is provided in the center of the rotation-stop anti-slip sheet (2), and a thread matching the motor shaft (3) is provided inside the rotation-stop hole (20).

2. The motor shaft anti-rotation structure according to claim 1, characterized in that: A plurality of locking points (201) are arranged on the outer edge of the anti-rotation hole (20), and the locking points (201) are protruding along one side of the inner diameter of the anti-rotation hole (20).

3. The motor shaft anti-rotation structure according to claim 1, characterized in that: Three locking points (201) are evenly arranged along the circumference of the outer side of the anti-rotation hole (20).

4. The motor shaft anti-rotation structure according to claim 2, characterized in that: The inner diameter of the locking point (201) is smaller than the inner diameter of the anti-rotation hole (20).

5. The motor shaft anti-rotation structure according to claim 2, characterized in that: The locking point (201) is configured as a triangle, and the base of the triangle faces the anti-rotation hole (20).

6. The motor shaft anti-rotation structure according to claim 1, characterized in that: The anti-rotation and anti-slip sheet (2) is tightly attached to the outer side of the hook claw (1), and the anti-rotation hole (20) corresponds to the motor shaft mounting groove (12).

7. The motor shaft anti-rotation structure according to claim 1, characterized in that: The side edges of the anti-rotation and anti-slipping piece (2) are dispersedly provided with positioning fulcrums (21) and limiting fulcrums (22); the outer side of the hook claw (1) is provided with a positioning groove (11); the bottom of the hook claw (1) is provided with a motor shaft mounting groove (12); the positioning fulcrum (21) is inserted into the positioning groove (11); and the limiting fulcrum (22) is clamped into the motor shaft mounting groove (12).

8. The motor shaft anti-rotation structure according to claim 1, characterized in that: The positioning support (21) is configured in a cylindrical shape, and the limiting support (22) is configured in a circular arc strip shape.

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