Abutting structure of gear box

Abstract

The utility model relates to an abutting structure of a gear box, and belongs to the technical field of pedal motors, the abutting structure of the gear box comprises the gear box and a transmission shaft rotationally arranged in the gear box, the gear box is provided with an abutting head used for limiting axial movement of the transmission shaft, and the abutting head is located on one side of the transmission shaft in the axis direction. The transmission shaft has the effect of preventing the transmission shaft from axially moving.

Description

Technical Field

[0001] The present application relates to the technical field of pedal motors, and in particular to a tightening structure of a gear box. Background Art

[0002] At present, most automobile pedals are electric pedals, which use motors and transmission mechanisms to automatically rotate or retract the pedals, providing convenience for getting on and off high-chassis vehicles.

[0003] In the related art, a Chinese patent document with publication number CN115875405A discloses a transmission mechanism for a pedal motor, including a first transmission member, a second transmission member and a third transmission member, wherein the first transmission member includes a first gear hobbing member, and an input shaft is installed in the first transmission member, one end of the second transmission member is a second gear hobbing member used in conjunction with the first transmission member, and the other end of the second transmission member is a worm, and the third transmission member includes a worm wheel, and an output shaft is installed in the third transmission member. When working, the motor drives the first transmission member to rotate, the first transmission member meshes with the second gear hobbing member to drive the worm to rotate, and the worm drives the worm wheel and the output shaft to rotate to achieve transmission.

[0004] Regarding the above-mentioned related technologies, the transmission mechanism is usually arranged in a gear box, the second hobbing member and the worm of the second transmission member are arranged on the transmission shaft, and the transmission shaft is rotatably arranged in the gear box. During long-term use, the transmission shaft of the second transmission member is prone to axial movement. Utility Model Content

[0005] In order to help prevent the transmission shaft from axially moving, the present application provides a tightening structure of a gear box.

[0006] The present application provides a gearbox abutment structure that adopts the following technical solution:

[0007] A gearbox abutment structure comprises a gearbox and a transmission shaft rotatably arranged in the gearbox, wherein the gearbox is provided with an abutment joint for limiting the axial movement of the transmission shaft, and the abutment joint is located on one side of the axial direction of the transmission shaft.

[0008] By adopting the above technical solution, the abutment joint limits the axial position of the transmission shaft, which helps to prevent the transmission shaft from axial movement.

[0009] Preferably, the transmission shaft is rotatably arranged in the gear box via a bearing, and the abutment joint abuts against the bearing.

[0010] By adopting the above technical solution, the abutment head limits the movement of the bearing by abutting against the bearing, thereby limiting the axial movement of the transmission shaft and improving the transmission stability.

[0011] Preferably, the abutment head is movably inserted into the gear box, and a fixing member for fixing or disengaging the abutment head from the gear box is provided on the abutment head.

[0012] By adopting the above technical solution, the abutment head and the gear box are relatively separated by the fixing parts, which is helpful for the installation and maintenance of the transmission shaft. The abutment head and the gear box are relatively fixed by the fixing parts, which helps to limit the position of the transmission shaft and the bearing and reduce the possibility of axial movement of the transmission shaft.

[0013] Preferably, the fixing member comprises an external thread arranged on the abutment head and an internal thread arranged in the gear box, and the external thread is used for threadably matching with the internal thread.

[0014] By adopting the above technical solution, rotating the abutment head helps to achieve the fixation or disengagement of the abutment head and the gear box, thereby limiting the axial movement of the transmission shaft.

[0015] Preferably, a sealing ring is provided on the abutment joint, and the sealing ring is arranged along the circumference of the abutment joint.

[0016] By adopting the above technical solution, the provision of the sealing ring improves the sealing between the abutment head and the gear box, which helps to enhance the waterproof performance of the gear box.

[0017] Preferably, an operating block is provided on a side of the abutment head away from the transmission shaft.

[0018] By adopting the above technical solution, an external tool is used to clamp the operating block, which makes it easy to rotate the abutment head, thereby facilitating the fixing and separation of the abutment head and the gear box.

[0019] Preferably, the cross section of the operating block is a regular hexagon.

[0020] By adopting the above technical solution, it is further convenient to clamp the operating block and rotate the abutment head.

[0021] Preferably, a limit block is provided on the bearing, and the limit block abuts against the transmission shaft.

[0022] By adopting the above technical solution, the limit block abuts against the transmission shaft, further limiting the axial movement of the transmission shaft, making it difficult for the transmission shaft to move relative to the bearing.

[0023] In summary, this application includes the following beneficial technical effects:

[0024] The abutment joint limits the axial position of the transmission shaft, helping to prevent the transmission shaft from axial movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0026] Figure 2 It is a cross-sectional view of the overall structure of an embodiment of the present application.

[0027] Explanation of the accompanying drawings: 1. gear box; 2. transmission shaft; 3. abutment; 4. bearing; 5. fixing piece; 51. external thread; 52. internal thread; 6. sealing ring; 7. operating block; 8. limiting block; 9. opening; 10. accommodating chamber. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-2 This application is described in further detail.

[0029] The present application embodiment discloses a gearbox abutment structure. Figure 1 and Figure 2 The gearbox abutment structure includes a gearbox 1 and a transmission shaft 2 rotatably arranged in the gearbox 1. The transmission shaft 2 is coaxially fixed with the second hobbing member and the worm. The gearbox 1 is provided with an abutment joint 3 for limiting the axial movement of the transmission shaft 2. The abutment joint 3 is located on one side of the axial direction of the transmission shaft 2.

[0030] During operation, the transmission shaft 2 is located between the inner wall of the gear box 1 and the abutment joint 3. The abutment joint 3 limits the axial position of the transmission shaft 2, thereby helping to prevent the axial movement of the transmission shaft 2 and ensuring the stability of the transmission.

[0031] Reference Figure 1 and Figure 2 The two ends of the transmission shaft 2 are rotatably arranged in the gear box 1 through bearings 4. Specifically, the transmission shaft 2 is fixed to the inner ring of the bearing 4, and the outer ring of the bearing 4 is fixed to the inner wall of the gear box 1. The outer ring of the bearing 4 on one side abuts against the inner wall of the gear box 1 in the axial direction of the transmission shaft 2, and the outer ring of the bearing 4 on the other side abuts against the abutment 3, and the cross-section of the abutment 3 is circular.

[0032] During operation, the abutment joint 3 presses the bearing 4 tightly and limits the movement of the bearing 4 together with the gear box 1, thereby limiting the axial movement of the transmission shaft 2 and improving the transmission stability.

[0033] Reference Figure 2 A limit block 8 is fixed on the inner ring of the bearing 4 near the abutment joint 3. The limit block 8 is located on the side of the transmission shaft 2 near the abutment joint 3, and the limit block 8 abuts against the transmission shaft 2. An accommodating cavity 10 is provided on the side of the abutment joint 3 near the limit block 8. The limit block 8 is located in the accommodating cavity 10, which helps to reduce the possibility of interference between the abutment joint 3 and the limit block 8. The limit block 8 further limits the position of the transmission shaft 2, making it difficult for the transmission shaft 2 to slide relative to the bearing 4, and preventing the transmission shaft 2 from axial movement.

[0034] Reference Figure 2, the abutment 3 is movably arranged on the gearbox 1, and an opening 9 is provided on the gearbox 1 for the abutment 3 to move in or out, the opening 9 is connected to the inside of the gearbox 1, and the depth direction of the opening 9 is parallel to the axial direction of the transmission shaft 2, which is helpful for the installation and maintenance of the transmission shaft 2; the abutment 3 is provided with a fixing member 5 for relatively fixing or disengaging the abutment 3 from the gearbox 1; in order to facilitate the relative fixing or disengagement of the abutment 3 from the gearbox 1, the fixing member 5 includes an external thread 51 and an internal thread 52, the external thread 51 is fixedly arranged on the outer wall of the abutment 3, and the internal thread 52 is fixedly arranged on the inner wall of the opening 9, the external thread 51 is used for threaded cooperation with the internal thread 52, and the rotation axis of the abutment 3 is parallel to the rotation axis of the transmission shaft 2. In other embodiments, the fixing member 5 can be replaced by a screw threadedly arranged on the gearbox 1, and a connecting hole connected to the screw is provided on the abutment 3, and the relative fixing of the abutment 3 and the gearbox 1 can also be achieved by connecting the screw with the connecting hole.

[0035] During installation, the transmission shaft 2 and the bearing 4 are installed into the gear box 1 from the opening 9, and then the abutment 3 is rotated to make the external thread 51 and the internal thread 52 threadedly matched, and then the abutment 3 is abutted against the outer ring of the bearing 4, thereby limiting the movement of the bearing 4, preventing the transmission shaft 2 from axial movement, and improving the stability of the transmission. When the second hobbing member and the worm on the transmission shaft 2 need to be maintained, the abutment 3 is rotated and the abutment 3 is removed from the gear box 1, thereby facilitating the operator's work, which is simple and convenient.

[0036] Reference Figure 1 and Figure 2 The cross section of the abutment 3 matches the cross section of the opening 9, and an operating block 7 is fixed on the side of the abutment 3 away from the transmission shaft 2, and the cross section of the operating block 7 is a regular hexagon. The regular hexagonal operating block 7 is convenient for using an external wrench to rotate the abutment 3, providing convenience for the operator's work.

[0037] Reference Figure 2 A sealing ring 6 is embedded in the abutment joint 3 and arranged along the circumference of the abutment joint 3. The sealing ring 6 is located on the side of the external thread 51 away from the transmission shaft 2. The sealing ring 6 is used to abut against the inner wall of the opening 9. The sealing ring 6 can be a rubber ring, a plastic ring, etc., which is not limited here. The arrangement of the sealing ring 6 helps to improve the sealing performance between the abutment joint 3 and the gear box 1 and enhance the waterproof performance of the gear box 1.

[0038] The implementation principle of the embodiment of the present application is as follows: during installation, the transmission shaft 2 and the bearing 4 are installed into the gear box 1 through the opening 9, and then the operating block 7 is clamped with an external wrench, and the abutment joint 3 is rotated to make the external thread 51 and the internal thread 52 threadedly cooperate, until the abutment joint 3 moves into the opening 9, the abutment joint 3 abuts against the outer ring of the bearing 4, and the sealing ring 6 abuts against the inner wall of the opening 9. During operation, the abutment joint 3 and the gear box 1 can limit the axial movement of the bearing 4 in the transmission shaft 2, and the limit block 8 limits the position of the transmission shaft 2, thereby helping to prevent the transmission shaft 2 from moving in the axial direction and improving the transmission stability.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A gearbox abutment structure, comprising a gearbox (1) and a transmission shaft (2) rotatably disposed in the gearbox (1), characterized in that: The gear box (1) is provided with an abutment joint (3) for limiting the axial movement of the transmission shaft (2); the abutment joint (3) is located on one side in the axial direction of the transmission shaft (2).

2. The gearbox abutment structure according to claim 1, characterized in that: The transmission shaft (2) is rotatably arranged in the gear box (1) via a bearing (4), and the abutment head (3) abuts against the bearing (4).

3. The gearbox abutment structure according to claim 2, characterized in that: The abutment head (3) is movably inserted into the gear box (1), and a fixing member (5) is provided on the abutment head (3) for fixing or disengaging the abutment head (3) from the gear box (1) relative to each other.

4. The gearbox abutment structure according to claim 3, characterized in that: The fixing member (5) comprises an external thread (51) arranged on the abutment head (3) and an internal thread (52) arranged in the gear box (1); the external thread (51) is used for threaded engagement with the internal thread (52).

5. The gear box abutment structure according to claim 3, characterized in that: The abutment head (3) is provided with a sealing ring (6), and the sealing ring (6) is arranged along the circumference of the abutment head (3).

6. The gear box abutment structure according to claim 3, characterized in that: An operating block (7) is provided on the side of the abutment head (3) away from the transmission shaft (2).

7. The gear box abutment structure according to claim 6, characterized in that: The cross section of the operating block (7) is a regular hexagon.

8. A gearbox abutment structure according to any one of claims 2 to 7, characterized in that: A limit block (8) is provided on the bearing (4), and the limit block (8) abuts against the transmission shaft (2).

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