CN2224142Y

CN2224142Y - Locking device for center shaft of bicycle

Info

Publication number: CN2224142Y
Application number: CN95205516U
Authority: CN
Inventors: 吕水淼
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-03-08
Filing date: 1995-03-08
Publication date: 1996-04-10
Anticipated expiration: 2005-03-08

Abstract

The utility model relates to a locking device of a middle axle of a bicycle, which belongs to a bicycle anti-theft lock. The utility model comprises a middle axle (21), a middle axle sleeve (22) and an axle bowl, wherein the middle axle (21) is arranged in the middle axle sleeve (22) in an eccentric mode, and axle lins of the middle axle and the middle axle sleeve are parallel; a bicycle lock (25) can be arranged on a left space; the middle axle (21) is provided with a key groove (211) on the direction which is parallel to the axle lines; the key groove can be used for containing a lock tongue (251); the lock tongue (251) can fall into the (211) by rotating; the middle axle (21) exists in a locking state and can not freely rotate. The utility model can also be applied on other non-motor vehicles with the similar structure.

Description

The bicycle middle shaft blocking device

The utility model relates to a kind of later-model anti-theft lock for bicycle, especially relates to a kind of anti-theft column lock that can the locking bicycle axis.

Although sell in the market and bicycle lock that the public generally uses varied, of a great variety, they all have a common feature, promptly Suo Ding position is a cycle wheel.Relative proper motion car itself, lock obviously are " external things ", the burglar can by cut, cut, pound, means such as sled separate Che Yusuo, ruin lock and steal car.Even this class lock is updated, also be difficult to fundamentally play antitheft effect, thereby in some big or middle cities, the stolen phenomenon of bicycle has become the social concern that is on the rise of puzzlement citizen life, press for and obtain radical cure.

The purpose of this utility model provides a kind of shortcoming that can overcome prior art, again the bicycle middle shaft blocking device with reliable anti-theft feature that combines together with frame.

For reaching this purpose, the utility model a rice technical solution of getting be the axis of bicycle partly to be made improve design, a kind of blocking device of bicycle middle shaft comprises axis, bottom bracket axle, axle bowl, and axis is arranged off-centre in bottom bracket axle, the two parallel axes, the spatial destribution lock of reserving, the direction that parallels to the axis on the axis is driven a keyway, is used to hold dead bolt, dead bolt (251) falls into keyway (211), and axis (21) just is in the lock state.

Because the utility model is changed traditional lock wheel mode; look for another way; adopted the Central axis locking device; lock and bicycle are combined as a whole dexterously; lock can't be opened with common theft means; improve the anti-theft feature of bicycle, protected the people's property safety effectively, had positive social benefit and favorable economic benefit.

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in further detail.

Fig. 1 is the external form scheme drawing of ordinary bicycle;

Fig. 2 is the axis diagram of gears of the present utility model;

Conter clockwise changes 90 ° cutaway view to Fig. 3 for Fig. 2 analyses and observe also along A-A;

Fig. 4 is an axis scheme drawing of the present utility model;

Fig. 5 is the B-B cutaway view among Fig. 3;

Fig. 6 is the axle bowl that the utility model adopts;

Fig. 7 is the C-C cutaway view among Fig. 4.

In Fig. 1,1 is the vehicle frame of bicycle, and 2 is the middle shaft transmission of bicycle, and the left crank of bicycle is 3,4 to pedal for the left foot of bicycle.

Middle shaft transmission 2 as shown in Figure 2, its bowl 23 is fixing for welding with bottom bracket axle 22, and weld nugget is 24; Axis 21 is equipped with ball 27, lining 28 by axle bowl 23, and with locknut 29 lockings, end cap 26 seals.Because the bowl-shape position (231) of axle bowl (23) and its bottom open-work (233) dead in line, the two is arranged off-centre in whole axle bowl (23), but parallel axes.As shown in Figure 6 and Figure 7, make its space of reserving be used to install lock 25, as seen from Figure 3, lock 25 is made up of lock tube 252 and dead bolt 251, fixing for welding with bottom bracket axle 22, dead bolt 251 is " L " type, when inserting key turns dead bolt 251, make it to fall into just the keyway 211 of axis, then axis is locked.In the present embodiment, the axis (21) that has keyway (211) is after assembling, and at lock-out state, left crank (3) is 90 ° with ground-surface angle, and left foot is pedaled (4) near ground.If visually the left foot of bicycle is pedaled 4 path of motion circle clock, then left foot was pedaled 46 of being positioned at clock and was located this moment.Therefore under the Central axis locking state, bicycle pedal is that the lower-left is upper right, inconvenient go-cart walking, so the burglar is easy to be found.If guarantee that in fact bicycle left threading 4 is positioned at 3 to 6 zones of clock under lock-out state, identical effect all arranged.

Axis 21 of the present utility model as shown in Figure 4 and Figure 5, because the cause of keyway, the diameter at axis middle part will suitably strengthen to satisfy the requirement of strength of axis, so the diameter at the position, keyway 211 place of axis 21 is bigger by 10%～50% than the diameter of common axis corresponding site.

Lock 25 lock cores in the utility model are "+" word groove structure, have only with private key and just can unblank.

The utility model can also be applied on other unpowered vehicles with similar structures.

Claims

1. the blocking device of a bicycle middle shaft, comprise axis (21), bottom bracket axle (22), axle bowl (23), it is characterized in that: axis (21) is arranged off-centre in bottom bracket axle (22), the two parallel axes, the basement reserved is arranged lock (25), and axis (21) the upside direction that parallels to the axis is driven a keyway (211), is used to hold dead bolt (251), dead bolt (251) falls into keyway (211), and axis (21) just is in the lock state.

2. bicycle middle shaft blocking device according to claim 1 is characterized in that: the bowl-shape position (231) of axle bowl (23) and its bottom open-work (233) dead in line, and the two is arranged off-centre in whole axle bowl (23), but parallel axes.

3. bicycle middle shaft blocking device according to claim 1 is characterized in that: the diameter at keyway (211) position, place of axis (21) is bigger by 10%～50% than the diameter of common axis corresponding site.

4. bicycle middle shaft blocking device according to claim 1 is characterized in that: the axis (21) that has keyway (211) is after assembling, and at lock-out state, left crank (3) is 90 ° with ground-surface angle, and left foot is pedaled (4) near ground.

5. bicycle middle shaft blocking device according to claim 1 is characterized in that: the lock core of lock (25) is "+" word groove structure.

6. bicycle middle shaft blocking device according to claim 1 is characterized in that: dead bolt (251) is " L " type.