CN214565972U

CN214565972U - Bicycle chain wheel crank with anti-theft function

Info

Publication number: CN214565972U
Application number: CN202120885402.XU
Authority: CN
Inventors: 李方; 杨军; 葛志峰
Original assignee: Jurong Taijia Bicycle Accessories Co ltd
Current assignee: Jurong Taijia Bicycle Accessories Co ltd
Priority date: 2021-04-27
Filing date: 2021-04-27
Publication date: 2021-11-02
Anticipated expiration: 2031-04-27

Abstract

The utility model discloses a sprocket crank for bicycle with theftproof function, including the toothed disc, the side of toothed disc is provided with connection base, through bolt fixed connection between connection base and the toothed disc, connection base's shape sets up to round platform shape structure, and connection base's the outside is provided with the protection dish, through cup jointing mode fixed connection between protection dish and the connection base, connection base's one end is provided with central pivot, through grafting mode fixed connection between central pivot and the connection base, the one end of central pivot is provided with the linking arm. The relative position between the connecting arm and the central rotating shaft can be locked through the arranged lock cylinder, so that when the lock cylinder is not used, the lock cylinder can be closed, idle rotation can be achieved between the connecting arm and the central rotating shaft, the connecting arm cannot provide driving for rotation of the central rotating shaft, and the anti-theft performance of the lock cylinder is improved.

Description

Bicycle chain wheel crank with anti-theft function

Technical Field

The utility model relates to a bicycle technical field specifically is a sprocket crank for bicycle with theftproof function.

Background

A bicycle is a common and very popular personal mechanical device, and its holding capacity and users are hundreds of millions in the world. Improvements to the bicycle itself have never been made for more than two hundred years since its birth. With the development of society, the function of the bicycle as a sports apparatus, a fitness device and an entertainment tool is continuously improved, and the bicycle provides power for the improvement of the performance of the bicycle for the most drastic improvement.

However, the conventional chain wheel crank assembly on the bicycle does not have the anti-theft function, so that the anti-theft performance of the bicycle is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sprocket crank for bicycle with theftproof function aims at improving the sprocket crank assembly on the current bicycle and does not possess the theftproof function, so will let the problem that the theftproof performance of bicycle reduces.

The utility model discloses a realize like this:

the utility model provides a sprocket crank for bicycle with theftproof function, includes the toothed disc, the side of toothed disc is provided with connection base, through bolt fixed connection between connection base and the toothed disc, connection base's shape sets up to round platform shape structure, and connection base's the outside is provided with the protection dish, through cup jointing mode fixed connection between protection dish and the connection base, connection base's one end is provided with central pivot, through grafting mode fixed connection between central pivot and the connection base, the one end of central pivot is provided with the linking arm, rotate the connection through the mode of cup jointing between linking arm and the central pivot, grafting mode fixedly connected with lock core is passed through to the one end of central pivot.

Furthermore, a first locking hole is formed in the outer side of one end of the central rotating shaft in a penetrating mode, a second locking hole is formed in the outer side of one end of the connecting arm in a penetrating mode, a locking pin column is arranged on the outer side of the lock cylinder, the locking pin column can penetrate through the first locking hole and the second locking hole to be locked, and therefore the lock cylinder can lock the relative position of the central rotating shaft and the connecting arm.

Further, the side symmetry of toothed disc runs through and has seted up the locking hole, connection base's bottom symmetry runs through and has seted up the spread groove, is fixed between for the convenience of using the bolt with toothed disc and connection base through setting up like this to it is more convenient to let it assemble.

Furthermore, the side center department of toothed disc has run through and has seted up first spacing hole, connection base's top center department runs through and has seted up the spacing hole of second, the diameter in first spacing hole and the spacing hole of second is the same, is in order to let the axle center of toothed disc, connection base and central pivot on the collinear through setting up like this.

Further, the bottom of protection dish is provided with the spacing collar, fixed connection between spacing collar and the protection dish, and the internal diameter of spacing collar is the same with connection base's bottom external diameter, is to connect through the mode that cup joints in order to let between protection dish and the connection base through setting up like this.

Furthermore, the top end of the connecting base is provided with thread grooves, the thread grooves surround the axis of the connecting base and are distributed at equal intervals, the connecting disc is fixedly connected to the outer side of the central rotating shaft, a third limiting hole penetrates through the side face of the connecting disc, the third limiting hole surrounds the axis of the connecting disc and is distributed at equal intervals, and the central rotating shaft and the connecting base are fixed through the arrangement of the third limiting hole and the connecting disc by screws.

Furthermore, the one end fixedly connected with of lock core keeps off the dish, the key insertion hole has been seted up to the side that keeps off the dish, is for the convenience of being injectd the position of linking arm through setting up like this, also is for the convenience of letting the key insert in the lock core simultaneously.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model has the characteristics of rational in infrastructure, convenient to use, the relative position between linking arm and the central pivot can be locked through the lock core that sets up, so when not using, just can let realize idle running between linking arm and the central pivot through closing the lock core, and then let the linking arm can't provide the drive for the rotation of central pivot, improve its theftproof performance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic view of a bicycle chain wheel crank with anti-theft function according to the present invention;

FIG. 2 is a schematic view of the detachable structure of the bicycle chain wheel crank with anti-theft function of the present invention;

FIG. 3 is a schematic structural view of a sprocket crank gear plate for a bicycle with an anti-theft function according to the present invention;

FIG. 4 is a schematic structural view of a connection base of the anti-theft chain wheel crank of the present invention;

FIG. 5 is a schematic structural view of a guard plate of the bicycle sprocket crank with anti-theft function of the present invention;

FIG. 6 is a schematic structural view of a central shaft of a bicycle chain wheel crank with anti-theft function according to the present invention;

FIG. 7 is a schematic structural view of a connecting arm of a bicycle chain wheel crank with an anti-theft function according to the present invention;

fig. 8 is a schematic structural view of the lock cylinder of the bicycle sprocket crank with anti-theft function of the present invention.

In the figure: 1. a gear plate; 11. a locking hole; 12. a first limit hole; 2. a connection base; 21. connecting grooves; 22. a second limiting hole; 23. a thread groove; 3. a protection disk; 31. a limiting ring; 4. a central rotating shaft; 41. a connecting disc; 411. a third limiting hole; 42. a first locking hole; 5. a connecting arm; 51. a second locking hole; 6. a lock cylinder; 61. locking the pin; 62. a catch tray; 621. a key insertion hole.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

Referring to fig. 1, 2, 3, 4, 5, 6, 7 and 8, a bicycle sprocket crank with an anti-theft function comprises a gear disc 1, a connection base 2 is arranged on a side surface of the gear disc 1, the connection base 2 is fixedly connected with the gear disc 1 through bolts, the connection base 2 is in a circular truncated cone-shaped structure, a protection disc 3 is arranged on the outer side of the connection base 2, the protection disc 3 is fixedly connected with the connection base 2 in a sleeving manner, a central rotating shaft 4 is arranged at one end of the connection base 2, the central rotating shaft 4 is fixedly connected with the connection base 2 in an inserting manner, a connecting arm 5 is arranged at one end of the central rotating shaft 4, the connecting arm 5 is rotatably connected with the central rotating shaft 4 in a sleeving manner, and a lock cylinder 6 is fixedly connected with one end of the central rotating shaft 4 in an inserting manner.

Preferably, a first locking hole 42 is formed through the outer side of one end of the central rotating shaft 4, a second locking hole 51 is formed through the outer side of one end of the connecting arm 5, and a locking pin 61 is arranged on the outer side of the lock cylinder 6, so that the locking pin 61 can pass through the first locking hole 42 to be locked with the second locking hole 51, and the lock cylinder 6 can lock the relative position of the central rotating shaft 4 and the connecting arm 5.

Preferably, the side symmetry of toothed disc 1 runs through and has seted up locking hole 11, and the bottom symmetry of connection base 2 runs through and has seted up spread groove 21, is fixed between for the convenience of using the bolt with toothed disc 1 and connection base 2 through setting up like this to it is more convenient to let it assemble.

Preferably, the center of the side surface of the gear disc 1 is provided with a first limit hole 12 in a penetrating manner, the center of the top end of the connecting base 2 is provided with a second limit hole 22 in a penetrating manner, the first limit hole 12 and the second limit hole 22 have the same diameter, and the arrangement is that the axes of the gear disc 1, the connecting base 2 and the central rotating shaft 4 are on the same straight line.

Preferably, the bottom of protection dish 3 is provided with spacing collar 31, fixed connection between spacing collar 31 and the protection dish 3, and the internal diameter of spacing collar 31 is the same with connection base 2's bottom external diameter, is to connect through the mode that cup joints in order to let between protection dish 3 and the connection base 2 through setting up like this.

Preferably, the top end of the connection base 2 is provided with a thread groove 23, the thread grooves 23 are distributed around the axis of the connection base 2 at equal intervals, the outer side of the central rotating shaft 4 is fixedly connected with the connection disc 41, the side surface of the connection disc 41 is provided with a third limiting hole 411 in a penetrating manner, the third limiting hole 411 is distributed around the axis of the connection disc 41 at equal intervals, and the arrangement is convenient for fixing the central rotating shaft 4 and the connection base 2 by using screws.

Preferably, one end of the key cylinder 6 is fixedly connected with a baffle disc 62, and a key insertion hole 621 is formed in a side surface of the baffle disc 62, so that the position of the connecting arm 5 is easily defined, and a key is also easily inserted into the key cylinder 6.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a sprocket crank for bicycle with theftproof function, includes toothed disc (1), its characterized in that: the side of toothed disc (1) is provided with connection base (2), through bolt fixed connection between connection base (2) and toothed disc (1), the shape of connection base (2) sets up to round platform shape structure, and the outside of connection base (2) is provided with protection dish (3), through cup jointing mode fixed connection between protection dish (3) and connection base (2), the one end of connection base (2) is provided with central pivot (4), through grafting mode fixed connection between central pivot (4) and connection base (2), the one end of central pivot (4) is provided with linking arm (5), rotate through the cup jointing mode between linking arm (5) and central pivot (4) and connect, the one end of central pivot (4) is through grafting mode fixedly connected with lock core (6).

2. The bicycle chain wheel crank with anti-theft function according to claim 1, characterized in that a first locking hole (42) is formed through the outer side of one end of the central rotating shaft (4), a second locking hole (51) is formed through the outer side of one end of the connecting arm (5), and a locking pin (61) is arranged on the outer side of the lock core (6).

3. The bicycle chain wheel crank with anti-theft function as claimed in claim 1, wherein the side of the gear plate (1) is symmetrically penetrated with locking holes (11), and the bottom of the connecting base (2) is symmetrically penetrated with connecting slots (21).

4. The bicycle chain wheel crank with the anti-theft function according to claim 1, wherein a first limiting hole (12) is formed in the center of the side surface of the gear plate (1) in a penetrating manner, a second limiting hole (22) is formed in the center of the top end of the connecting base (2) in a penetrating manner, and the first limiting hole (12) and the second limiting hole (22) have the same diameter.

5. The bicycle chain wheel crank with the anti-theft function according to claim 1, characterized in that the bottom of the protection disc (3) is provided with a limiting ring (31), the limiting ring (31) is fixedly connected with the protection disc (3), and the inner diameter of the limiting ring (31) is the same as the outer diameter of the bottom of the connecting base (2).

6. The bicycle chain wheel crank with the anti-theft function according to claim 1, characterized in that the top end of the connecting base (2) is provided with a thread groove (23), the thread groove (23) is distributed around the axis of the connecting base (2) at equal intervals, the outer side of the central rotating shaft (4) is fixedly connected with a connecting disc (41), the side surface of the connecting disc (41) is provided with a third limiting hole (411) in a penetrating manner, and the third limiting holes (411) are distributed around the axis of the connecting disc (41) at equal intervals.

7. The bicycle sprocket crank with anti-theft function according to claim 1, wherein a blocking disc (62) is fixedly connected to one end of the lock cylinder (6), and a key insertion hole (621) is formed in the side surface of the blocking disc (62).