CN204056174U

CN204056174U - Detachable bicycle crank

Info

Publication number: CN204056174U
Application number: CN201420537178.5U
Authority: CN
Inventors: 程剑祥; 王绪鹏
Original assignee: TAIZHOU BICYCLE THREE SETS AXLE GENERAL FACTORY
Current assignee: TAIZHOU BICYCLE THREE SETS AXLE GENERAL FACTORY
Priority date: 2014-09-18
Filing date: 2014-09-18
Publication date: 2014-12-31
Anticipated expiration: 2024-09-18

Abstract

The utility model discloses a kind of detachable bicycle crank, described detachable bicycle crank comprises a main shaft, and the two ends of described main shaft are respectively equipped with a separable pogo barrel, described pogo barrel is respectively equipped with a separable handle leg.Detachable bicycle crank of the present utility model utilizes separable pogo barrel and separable handle leg, and user can complete the installation Sum decomposition of crank fast, and complete M/C is without the need to any instrument, efficient and convenient, practical.

Description

Detachable bicycle crank

Technical Field

The utility model relates to a bicycle parts manufacture equipment, more exactly, is a detachable bicycle crank.

Background

Cranks are a very common part of bicycles and are used to connect to a chainring and drive the bicycle. The existing cranks are usually integrally formed, and the crank legs cannot be detached, so that the crank is very inconvenient for users of bicycles, particularly for children.

SUMMERY OF THE UTILITY MODEL

The utility model discloses solve the technical problem that prior art exists mainly to a detachable bicycle crank is provided.

The above technical problem of the present invention can be solved by the following technical solutions:

the utility model provides a detachable bicycle crank, detachable bicycle crank contain a main shaft, the both ends of main shaft be equipped with a separable spring bushing respectively, spring bushing on be equipped with a separable shank leg respectively.

As a preferred embodiment of the present invention, the main shaft comprises a tubular shaft tube, two ends of the shaft tube are respectively provided with a tubular spindle nose, the interior of the spindle nose is provided with a hollow clamping groove, the bottom of the spindle nose is provided with an annular limiting step, the side wall of the spindle nose is provided with a ball mounting hole array consisting of ball mounting holes, the side wall of the head of the spindle nose is provided with an annular limiting ring groove, the ball mounting holes are respectively provided with a ball, the limiting ring groove is provided with a C-shaped limiting snap ring, the spindle nose is respectively sleeved with a locking spring, the locking spring is in contact with the limiting step, the spring sleeve comprises a tubular sleeve main body, the sleeve main body is provided with a snap ring step and a spring step, the snap ring step is matched with the limiting snap ring, the spring step with locking spring cooperate, the shank leg contain a leg body, the afterbody be equipped with a columnar rotation post and a connecting plug, the lateral wall of rotation post on be equipped with an annular sunken direction annular, the direction annular with ball cooperate.

As an embodiment of the present invention, the card slot includes a curved first card slot arc surface, a pair of parallel arrangement's second card slot plane and a third card slot plane, the planar direction that sets up of second card slot with third card slot plane mutually perpendicular, connecting plug include a curved first plug arc surface, a pair of parallel arrangement's second plug plane and a third plug plane, the planar direction that sets up of second plug with third plug plane mutually perpendicular, first plug arc surface with first card slot arc surface cooperate, second plug plane with second card slot plane cooperate, third plug plane with third card slot plane cooperate.

The utility model discloses a detachable bicycle crank utilizes separable spring bushing and separable shank, and the user can accomplish articulate installation and decomposition fast, and complete manually operation need not any instrument, and is swift convenient, and the practicality is strong.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic perspective view of a detachable bicycle crank according to the present invention;

FIG. 2 is an exploded perspective view of the detachable bicycle crank illustrated in FIG. 1;

FIG. 3 is an enlarged detail view of the area A of the detachable bicycle crankset of FIG. 2;

FIG. 4 is a perspective view of the spring bushing of the detachable bicycle crank of FIG. 2;

FIG. 5 is a cross-sectional view of the spring sleeve of FIG. 4 taken along line B-B;

FIG. 6 is a perspective view of the retainer ring of the detachable bicycle crank illustrated in FIG. 2;

FIG. 7 is a perspective view of the main shaft of the detachable bicycle crank of FIG. 2;

FIG. 8 is a cross-sectional view of the main shaft of the detachable bicycle crank of FIG. 7 taken along the line C-C;

FIG. 9 is an enlarged detail view of the area F of the main axle of the detachable bicycle crank of FIG. 8;

FIG. 10 is a cross-sectional view of the main axle of the detachable bicycle crank of FIG. 7 taken along line D-D;

FIG. 11 is a cross-sectional view of the main axle of the detachable bicycle crank of FIG. 7 taken along line E-E;

FIG. 12 is a perspective view of the shank of the detachable bicycle crankset of FIG. 2;

FIG. 13 is an enlarged detail view of the G region of the shank of FIG. 12;

wherein,

1. a detachable bicycle crank; 2. a main shaft; 20. an axle tube; 21. a shaft head; 210. a card slot; 2101. a first slot arc surface; 2102. a second card slot plane; 2103. a third slot plane; 211. a limiting step; 212. a ball mounting hole; 213. a limiting ring groove; 3. a spring sleeve; 30. a cannula body; 31. a snap ring step; 32. a spring step; 4. a handle leg; 41. a leg body; 42. rotating the column; 421. a guide ring groove; 43. a connecting plug; 431. a first plug arc surface; 432. a second plug plane; 433. a third plug plane; 5. a limit snap ring; 6. a locking spring; 7. and a ball.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be more clearly and clearly defined.

The utility model provides a detachable bicycle crank.

As shown in fig. 1 to 13, the detachable bicycle crank 1 of the present invention comprises a main shaft 2, a separable spring sleeve 3 is disposed at each end of the main shaft 2, and a separable handle leg 4 is disposed on each spring sleeve 3.

The main shaft 2 comprises a tubular shaft tube 20, two ends of the shaft tube 20 are respectively provided with a tubular shaft head 21, a hollow clamping groove 210 is arranged inside the shaft head 21, the bottom of the shaft head 21 is provided with an annular limiting step 211, the side wall of the shaft head 21 is provided with a ball mounting hole array consisting of ball mounting holes 212, the side wall of the head of the shaft head 21 is provided with an annular limiting ring groove 213, the ball mounting holes 212 are respectively provided with a ball 7, the limiting ring groove 213 is provided with a C-shaped limiting snap ring 5, the shaft head 21 is respectively sleeved with a locking spring 6, the locking spring 6 is abutted against the limiting step 211, the spring sleeve 3 comprises a tubular sleeve main body 30, the sleeve main body 30 is internally provided with a snap ring step 31 and a spring step 32, the snap ring step 31 is matched with the limiting snap ring 5, the spring step 32 is matched with the locking spring 6, the handle leg 4 comprises a leg body 41, the tail part is provided with a columnar rotating column 42 and a connecting plug 43, the side wall of the rotating column 42 is provided with an annular concave guide ring groove 421, and the guide ring groove 421 is matched with the ball 7.

This draw-in groove 210 contains a curved first draw-in groove cambered surface 2101, a pair of parallel arrangement's second draw-in groove plane 2102 and a third draw-in groove plane 2103, the direction of setting of this second draw-in groove plane 2102 and this third draw-in groove plane 2103 mutually perpendicular, this connecting plug 43 contains a curved first plug cambered surface 431, a pair of parallel arrangement's second plug plane 432 and a third plug plane 433, the direction of setting of this second plug plane 432 and this third plug plane 433 mutually perpendicular, this first plug cambered surface 431 cooperatees with this first draw-in groove cambered surface 2101, this second plug plane 432 cooperatees with this second draw-in groove plane 2102, this third plug plane 433 cooperatees with this third draw-in groove plane 2103.

In use, as shown in fig. 2, a user firstly sleeves the locking spring 6 on the spindle head 21, installs the ball 7 in the ball installation hole 212, installs the limit snap ring 5 in the limit ring groove 213, and then sleeves the spring sleeve 3 on the spring sleeve 3. Because the bottom of the locking spring 6 is propped against the limit step 211, the top thereof is propped against the spring step 32, and meanwhile, the limit snap ring 5 is propped against the snap ring step 31 of the spring sleeve 3, so that the whole spring sleeve 3 can move along the axial direction and the radial direction of the spring sleeve 3 without being separated from the shaft head 21.

Then, the connection plug 43 of the shank 4 is inserted into the card slot 210 so that the first plug arc 431 mates with the first card slot arc 2101, the second plug plane 432 mates with the second card slot plane 2102, and the third plug plane 433 mates with the third card slot plane 2103. Due to the cooperation of the first slot arc 2101 and the third slot plane 2103, the connecting plug 43 cannot rotate within the stub shaft 21, and the entire shank 4 is completely installed.

When dismantling, the user is as long as press spring sleeve 3 for spacing snap ring 5 and the separation of snap ring step 31 make ball 7 expose, and at this moment, the contact between ball 7 and the direction annular 421 is lax, and the user directly pulls out shank 4 can. For the same reason, the user can complete the installation of the shank 4.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.

Claims

1. The utility model provides a detachable bicycle crank, its characterized in that, detachable bicycle crank (1) contain a main shaft (2), the both ends of main shaft (2) be equipped with a separable spring bushing (3) respectively, spring bushing (3) on be equipped with a separable handle leg (4) respectively.

2. The detachable bicycle crank of claim 1, wherein the main shaft (2) comprises a tubular shaft tube (20), two ends of the shaft tube (20) are respectively provided with a tubular shaft head (21), a hollow clamping groove (210) is arranged inside the shaft head (21), the bottom of the shaft head (21) is provided with an annular limiting step (211), the side wall of the shaft head (21) is provided with a ball mounting hole array formed by ball mounting holes (212), the side wall of the head of the shaft head (21) is provided with an annular limiting ring groove (213), the ball mounting holes (212) are respectively provided with a ball (7), the limiting ring groove (213) is provided with a C-shaped limiting snap ring (5), the shaft head (21) is respectively sleeved with a locking spring (6), locking spring (6) with spacing step (211) inconsistent, spring sleeve (3) contain a pipy sleeve pipe main part (30), sleeve pipe main part (30) in be equipped with a snap ring step (31) and a spring step (32), snap ring step (31) with spacing snap ring (5) cooperate, spring step (32) with locking spring (6) cooperate, shank leg (4) contain a leg body (41), the afterbody be equipped with a cylindrical rotation post (42) and a connection plug (43), the lateral wall of rotation post (42) on be equipped with an annular sunken direction annular groove (421), direction annular groove (421) with ball (7) cooperate.

3. The detachable bicycle crankset of claim 2, characterized in that said clamping slot (210) comprises an arc-shaped first clamping slot arc surface (2101), a pair of second clamping slot plane surfaces (2102) arranged in parallel and a third clamping slot plane surface (2103), said second clamping slot plane surface (2102) being arranged in a direction perpendicular to said third clamping slot plane surface (2103), said connecting plug (43) comprises an arc-shaped first plug arc surface (431), a pair of second plug plane surfaces (432) arranged in parallel and a third plug plane surface (433), said second plug plane surface (432) being arranged in a direction perpendicular to said third plug plane surface (433), said first plug arc surface (431) being fitted with said first clamping slot arc surface (2101), said second plug plane surface (432) being fitted with said second clamping slot plane surface (2102), the third plug plane (433) is matched with the third clamping groove plane (2103).