CN219077402U

CN219077402U - Crank anti-loose structure

Info

Publication number: CN219077402U
Application number: CN202223557782.8U
Authority: CN
Inventors: 郑朝元
Original assignee: Chuan Wei Metal Products Kunshan Co ltd
Current assignee: Chuan Wei Metal Products Kunshan Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-05-26
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses a crank anti-loosening structure which comprises a crank main body, wherein a mounting hole is formed in the crank main body, a mounting bolt is arranged in the mounting hole, a fixing bolt is connected to the crank main body, two annular grooves are formed in the mounting bolt, a rubber anti-slip ring is arranged in the annular grooves, and friction between the mounting bolt and the mounting hole is well increased through the arranged rubber anti-slip ring, so that loosening can be well prevented in the using process of a crank.

Description

Crank anti-loose structure

Technical Field

The utility model relates to the technical field of bicycle accessories, in particular to a crank anti-loosening structure.

Background

The crank is a bicycle accessory and a loose crank often makes a clicking sound. When the problem of the crank is checked, the crank is rotated to the horizontal position, the cranks on two sides are pressed downwards by force, and then the cranks are rotated for 180 degrees, and the same actions are repeated. If the crank is to rock, the crank fixing bolt should be tightened. The crank of a new bicycle is often subjected to such a check.

The crank in the prior art most does not have anti-loosening effect, and looseness is easy to generate in the long-time riding process.

Disclosure of Invention

The utility model aims to provide a crank anti-loosening structure for solving the problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a crank locking structure, includes the crank main part, set up the mounting hole on the crank main part, arranged the mounting bolt in the mounting hole, be connected with fixing bolt on the crank main part, two ring grooves have been seted up on the mounting bolt, have arranged rubber anti-skidding circle in the ring groove.

Preferably, the mounting bolt is provided with a transmission cavity, the transmission cavity is internally provided with a rotating gear in a rotating way, the rotating gear is provided with a rotating shaft, the transmission cavity is internally provided with two transmission sliding blocks in a sliding way, the transmission sliding blocks are connected with plug-in blocks, and the inner side wall of the mounting hole is provided with two plug-in grooves matched with the plug-in blocks.

Preferably, the inner wall of the top of the transmission cavity is provided with a rotation hole, the rotation shaft is rotatably arranged in the rotation hole, the top of the rotation shaft is provided with a first inner hexagonal jack, and the top of the installation bolt is provided with a second inner hexagonal jack.

Preferably, a limiting rotating groove is formed in the inner wall of the bottom of the transmission cavity, a limiting rotating shaft is rotatably mounted in the limiting rotating groove, and the limiting rotating shaft is mounted on the rotating gear.

Preferably, a transmission tooth slot which is meshed with the rotary gear is formed in the transmission sliding block.

Preferably, a guide sliding groove is formed in the transmission sliding block, a guide sliding rod is arranged in the guide sliding groove in a sliding mode, and the guide sliding rod is arranged on the inner wall of the transmission cavity.

Preferably, the guide slide bar is sleeved with a reset spring in a sliding manner, one end of the reset spring is arranged on the inner wall of the transmission cavity, and the other end of the reset spring is arranged on the transmission slide block.

The beneficial effects of the utility model are as follows:

according to the utility model, the friction force between the mounting bolt and the mounting hole is well increased through the rubber anti-slip ring, so that the looseness can be well prevented in the using process of the crank.

Drawings

FIG. 1 is a schematic diagram of a crank anti-loosening structure provided by the utility model;

FIG. 2 is a schematic cross-sectional view of a crank anti-loosening structure according to the present utility model;

FIG. 3 is a schematic top view of a crank locking structure according to the present utility model;

fig. 4 is an enlarged schematic view of the structure a in fig. 3 of the crank locking structure provided by the utility model.

In the figure: 1. a crank main body; 2. a fixing bolt; 3. installing a bolt; 4. a rotating shaft; 5. a first internal hexagonal socket; 6. a second internal hexagonal jack; 7. a rubber anti-slip ring; 8. rotating the gear; 9. a transmission slide block; 10. a guide slide bar; 11. a limit rotating groove; 12. a limit rotating shaft; 13. a plug block; 14. a guide chute; 15. a plug-in groove; 16. a return spring; 17. a transmission cavity; 18. a rotation hole; 19. an annular groove; 20. and (5) mounting holes.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-4, a crank anti-loosening structure is characterized by comprising a crank main body 1, wherein a mounting hole 20 is formed in the crank main body 1, a mounting bolt 3 is arranged in the mounting hole 20, a fixing bolt 2 is connected to the crank main body 1, two annular grooves 19 are formed in the mounting bolt 3, and a rubber anti-loosening ring 7 is arranged in the annular grooves 19.

By arranging the rubber anti-slip ring 7, the friction between the mounting bolt 3 and the mounting hole 20 is well increased, and the looseness can be well prevented in the using process of the crank main body 1.

Specifically, in this embodiment, the mounting bolt 3 is provided with a transmission cavity 17, the transmission cavity 17 is rotatably provided with a rotation gear 8, the rotation gear 8 is provided with a rotation shaft 4, two transmission sliding blocks 9 are slidably mounted in the transmission cavity 17, the transmission sliding blocks 9 are connected with plug blocks 13, and the inner side wall of the mounting hole 20 is provided with two plug grooves 15 matched with the plug blocks 13.

During installation, the rotating shaft 4 is screwed to drive the rotating gear 8 to rotate, so that the two transmission sliding blocks 9 are driven to be away from each other, and the two plug-in blocks 13 can be driven to be inserted into the plug-in grooves 15 on the inner wall of the mounting hole 20, so that the mounting bolt 3 and the crank main body 1 are fixed, and looseness between the crank main body 1 and the mounting bolt 3 in the use process is further prevented.

Specifically, in this embodiment, a rotation hole 18 is formed in the top inner wall of the transmission cavity 17, the rotation shaft 4 is rotatably mounted in the rotation hole 18, the top of the rotation shaft 4 is provided with a first inner hexagonal jack 5, and the top of the mounting bolt 3 is provided with a second inner hexagonal jack 6.

Through the mutual cooperation of the rotating holes 18 and the rotating shaft 4, the rotating shaft 4 can rotate along the rotating holes 18, and the rotating direction of the rotating shaft 4 is limited and guided.

Specifically, in this embodiment, a limiting rotation groove 11 is formed in the inner wall of the bottom of the transmission cavity 17, a limiting rotation shaft 12 is rotatably mounted in the limiting rotation groove 11, and the limiting rotation shaft 12 is mounted on the rotation gear 8.

Through the mutual cooperation of the arranged limiting rotating shafts 12 and the limiting rotating grooves 11, the limiting rotating shafts 12 can rotate along the limiting rotating grooves 11, so that the rotation of the rotating gears 8 is limited, and the rotating process of the rotating gears 8 is more stable.

Specifically, in this embodiment, a transmission tooth slot meshed with the rotation gear 8 is formed on the transmission slider 9.

By means of the arranged transmission tooth grooves, the transmission slide 9 can be transmitted when the rotary gear 8 rotates, so that the transmission slide 9 slides along the transmission cavity 17.

Specifically, in this embodiment, the driving slide 9 is provided with a guiding chute 14, the guiding chute 14 is slidably provided with a guiding slide bar 10, and the guiding slide bar 10 is mounted on the inner wall of the driving cavity 17.

By the mutual matching of the arranged guide slide bars 10 and the guide slide grooves 14, the guide slide bars 10 can slide along the guide slide grooves 14, and further the moving direction of the transmission slide blocks 9 is guided and limited.

Specifically, in this embodiment, the guide slide rod 10 is slidably sleeved with a return spring 16, one end of the return spring 16 is installed on the inner wall of the transmission cavity 17, and the other end of the return spring 16 is installed on the transmission slide block 9.

Through the reset spring 16 that arranges, can be when the rotation gear 8 drives two transmission sliders 9 and be close to each other, extrude reset spring 16 through transmission sliders 9, and then can be when loosening rotation gear 8, drive two transmission sliders 9 automatic reset through reset spring 16's elastic potential energy, and then make grafting piece 13 automatic insertion to grafting groove 15 in, accomplish the purpose of automatic locking.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides a crank locking structure, its characterized in that, includes crank main part (1), install hole (20) have been seted up on crank main part (1), install bolt (3) have been arranged in install hole (20), be connected with fixing bolt (2) on crank main part (1), two ring grooves (19) have been seted up on install bolt (3), have arranged rubber anti-skidding circle (7) in ring groove (19).

2. The crank locking structure according to claim 1, characterized in that the mounting bolt (3) is provided with a transmission cavity (17), the transmission cavity (17) is rotationally provided with a rotary gear (8), the rotary gear (8) is provided with a rotary shaft (4), two transmission sliding blocks (9) are slidably arranged in the transmission cavity (17), the transmission sliding blocks (9) are connected with plug blocks (13), and the inner side wall of the mounting hole (20) is provided with two plug grooves (15) matched with the plug blocks (13).

3. A crank locking structure according to claim 2, wherein: a rotating hole (18) is formed in the inner wall of the top of the transmission cavity (17), the rotating shaft (4) is rotatably installed in the rotating hole (18), a first inner hexagonal jack (5) is formed in the top of the rotating shaft (4), and a second inner hexagonal jack (6) is formed in the top of the installation bolt (3).

4. A crank locking structure according to claim 2, wherein: a limiting rotating groove (11) is formed in the inner wall of the bottom of the transmission cavity (17), a limiting rotating shaft (12) is rotatably mounted in the limiting rotating groove (11), and the limiting rotating shaft (12) is mounted on the rotating gear (8).

5. A crank locking structure according to claim 2, wherein: and a transmission tooth slot which is meshed with the rotary gear (8) is formed in the transmission sliding block (9).

6. A crank locking structure according to claim 2, wherein: the transmission slide block (9) is provided with a guide slide groove (14), the guide slide groove (14) is internally provided with a guide slide bar (10) in a sliding manner, and the guide slide bar (10) is arranged on the inner wall of the transmission cavity (17).

7. The crank locking structure as claimed in claim 6, wherein: the guide sliding rod (10) is sleeved with a return spring (16) in a sliding manner, one end of the return spring (16) is arranged on the inner wall of the transmission cavity (17), and the other end of the return spring (16) is arranged on the transmission sliding block (9).