Transmission key structure of mechanical clutch transmission shaft

Abstract

The utility model discloses a transmission key structure of a mechanical clutch transmission shaft, which comprises at least one transmission key 2 arranged on a transmission shaft 1, two ends of the transmission key 2 are inserted into the outer surface of the transmission shaft 1 for installation, and the outer surface of the transmission key 2 is provided with a cambered surface area. The contact area of the transmission key 2 and the transmission teeth 5 is located in the cambered surface area, the outer surface of the transmission key 2 is a cylindrical surface, the cross section of the transmission key 2 is a complete circle, the transmission shaft is further provided with a plurality of insertion holes, the two ends of the transmission key are bent and inserted into the insertion holes, the middle section of the transmission key is parallel to the transmission shaft, and the transmission shaft is provided with an arc-shaped groove. A guide chamfer is arranged at the opening of the insertion hole, the end part of the transmission key and the middle section of the transmission key form a 90-degree angle, and the cross section of the transmission key is arranged to be arc-shaped, so that the contact between the transmission key and the transmission teeth is changed into line-surface contact, and the friction force from the transmission key when the transmission teeth move is further reduced.

Description

Technical Field

[0001] This utility model relates to the field of transmission keys for mechanical clutch transmission shafts, and specifically to a transmission key structure for mechanical clutch transmission shafts. Background Technology

[0002] Currently, clutch drive shafts are classified into various types, including mechanical, electromagnetic, hydraulic, and pneumatic. Among them, mechanical clutch devices include dog clutch and friction clutch types. Dog clutch devices can strictly ensure the synchronization of two drive shafts. Currently, dog clutch structures and drive shafts often use flat keys or similar structures for power transmission. However, the surface contact area between the flat key structure and the transmission teeth is relatively large, resulting in greater resistance when the transmission teeth move axially on the drive shaft. Therefore, this utility model proposes a transmission key structure for a mechanical clutch drive shaft. Utility Model Content

[0003] In order to overcome the defects in the prior art, this utility model provides a transmission key structure for a mechanical clutch transmission shaft. By setting the cross-section of the transmission key to an arc shape, the contact between the transmission key and the transmission teeth is changed to a line-surface contact, thereby reducing the frictional force from the transmission key when the transmission teeth move.

[0004] Technical solution

[0005] A transmission key structure for a mechanical clutch drive shaft includes at least one transmission key 2 disposed on a drive shaft 1. The two ends of the transmission key 2 are inserted into the outer surface of the drive shaft 1 for installation. There is an arc-shaped area on the outer surface of the transmission key 2, and the contact area between the transmission key 2 and the transmission teeth 5 is located within the arc-shaped area.

[0006] Furthermore, the outer surface of the transmission key 2 is a cylindrical surface with a complete circular cross-section.

[0007] Furthermore, the drive shaft is also provided with several insertion holes, and the two ends of the drive key are bent and inserted into the insertion holes.

[0008] Furthermore, the middle section of the transmission key is parallel to the transmission shaft.

[0009] Furthermore, the opening of the socket is provided with a guide chamfer.

[0010] Furthermore, the end of the transmission key is at a 90-degree angle to the middle section of the transmission key.

[0011] Furthermore, the insertion hole is a through hole that passes through the drive shaft.

[0012] In another embodiment, the outer surface of the transmission key 2 includes a flat portion 21 and an arc portion 22, and the cross section of the transmission key 2 is composed of line segments and arcs.

[0013] Beneficial effects

[0014] Compared with the prior art, this utility model has the following advantages: by setting the cross section of the transmission key to an arc shape, the contact between the transmission key and the transmission teeth is changed to a line-surface contact, thereby reducing the frictional force from the transmission key when the transmission teeth move. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the transmission key structure of a mechanical clutch transmission shaft according to the present invention;

[0016] Figure 2 This is a schematic diagram of the transmission key.

[0017] Figure 3 This is a schematic diagram of the mounting holes;

[0018] Figure 4 This is a schematic diagram of the transmission structure of this utility model;

[0019] Figure 5 This is a cross-sectional view of the drive shaft and drive key.

[0020] Figure 6 This is a cross-sectional view of the transmission key in Example 1;

[0021] Figure 7 This is a cross-sectional view of the transmission key in Example 2.

[0022] Attached icon number

[0023] 1. Drive shaft; 2. Drive key; 21. Flat surface; 22. Curved surface; 3. Guide chamfer; 4. Insertion hole; 5. Drive gear. Detailed Implementation

[0024] To better illustrate the content of this utility model, the following description is provided in conjunction with the accompanying drawings and embodiments:

[0025] have Figures 1-7 As shown, this utility model discloses a transmission key structure for a mechanical clutch transmission shaft, including at least one transmission key 2 disposed on the transmission shaft 1. The two ends of the transmission key 2 are inserted into the outer surface of the transmission shaft 1 for installation. There is an arc surface area on the outer surface of the transmission key 2, and the contact area between the transmission key 2 and the transmission teeth 5 is located within the arc surface area.

[0026] Furthermore, the outer surface of the transmission key 2 is a cylindrical surface with a complete circular cross-section.

[0027] Furthermore, the drive shaft 1 is also provided with several insertion holes 4, and the two ends of the drive key 2 are bent and inserted into the insertion holes 4.

[0028] Furthermore, the middle section of the transmission key 2 is parallel to the transmission shaft 1.

[0029] Furthermore, a guide chamfer 3 is provided at the opening of the socket 4.

[0030] Furthermore, the end of the transmission key 2 is at a 90-degree angle to the middle section of the transmission key 2.

[0031] Furthermore, the insertion hole 4 is a through hole that passes through the drive shaft 1.

[0032] In another embodiment, the outer surface of the transmission key 2 includes a flat portion 21 and an arc portion 22, and the cross section of the transmission key 2 is composed of line segments and arcs.

[0033] Specifically, during use, the transmission key 2 is rotated by the transmission shaft 1, which in turn drives the transmission teeth 5 installed on the transmission shaft 1 and the transmission key 2 to rotate. The transmission teeth 5 are movable meshing teeth of the mechanical clutch transmission shaft. The power clutch is achieved by the axial movement of the transmission teeth 5 on the transmission shaft 1.

[0034] By setting the cross-section of the transmission key 2 as an arc surface, the contact area between the transmission key 2 and the inner contact surface of the transmission tooth 5 is greatly reduced, thereby reducing the frictional force when the transmission tooth 5 moves axially.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the technical solutions of this utility model have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A transmission key structure for a mechanical clutch drive shaft, characterized in that: It includes at least one transmission key (2) disposed on the transmission shaft (1), the two ends of the transmission key (2) are inserted into the outer surface of the transmission shaft (1) for installation, there is an arc surface area on the outer surface of the transmission key (2), and the contact area between the transmission key (2) and the transmission tooth (5) is located in the arc surface area.

2. The transmission key structure of a mechanical clutch transmission shaft according to claim 1, characterized in that: The outer surface of the transmission key (2) is a cylindrical surface, and the cross-section of the transmission key (2) is a complete circle.

3. The transmission key structure of a mechanical clutch transmission shaft according to claim 1, characterized in that: The outer surface of the transmission key (2) includes a flat portion (21) and an arc portion (22), and the cross section of the transmission key (2) is composed of line segments and arcs.

4. The transmission key structure of a mechanical clutch transmission shaft according to claim 2 or 3, characterized in that: The drive shaft (1) is also provided with several insertion holes (4), and the two ends of the drive key (2) are bent and inserted into the insertion holes (4).

5. The transmission key structure of a mechanical clutch transmission shaft according to claim 2 or 3, characterized in that: The middle section of the transmission key (2) is parallel to the transmission shaft (1).

6. The transmission key structure of a mechanical clutch transmission shaft according to claim 4, characterized in that: The opening of the socket (4) is provided with a guide chamfer (3).

7. The transmission key structure of a mechanical clutch transmission shaft according to claim 2 or 3, characterized in that: The end of the transmission key (2) is at a 90-degree angle to the middle section of the transmission key (2).

8. The transmission key structure of a mechanical clutch transmission shaft according to claim 4, characterized in that: The insertion hole (4) is a through hole that passes through the drive shaft (1).

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