CN2182783Y

CN2182783Y - Adjustable brake for speed-changeable brake

Info

Publication number: CN2182783Y
Application number: CN 94207516
Authority: CN
Inventors: 王国强
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-04-01
Filing date: 1994-04-01
Publication date: 1994-11-16
Anticipated expiration: 2004-04-01

Abstract

The utility model relates to an adjustable brake for speed-changeable brake, comprising a brake arm of clamp type and a brake shoe arranged on the brake arm. The utility model has the essential technology that the end of the brake arm of clamp type is hinged with a swinging arm. The screw bolts at the upper part of the swinging arm are in screw connection with the regulating rod which is sheathed with springs. A regulating nut is arranged on the head of the regulating rod. The brake shoe is arranged on the lower part of the swinging arm. The utility model has the advantages of small holding power on braking, sensitivity of braking, and convenient adjustment of the sensitivity.

Description

Adjustable brake for speed-changeable brake

The utility model relates to a kind of adjustable variable speed bicycle lock, and this lock contacted with rim moment, and the sensitivity of brake can be adjusted.

The speed of a motor vehicle of variable speed bicycle is very fast, needs the higher brake of sensitivity, because user's strength varies in size, and the environment for use difference, the sensitivity of brake should be adjustable at any time.Existing brake then can not satisfy above-mentioned requirements, steel wire cable brake commonly used, two jaw type lock arms are arranged, one end of lock arm is equipped with steel wire, and the other end is installed brake shoe, and this lock is once installation, the dynamics of its brake has just been determined, variation has just taken place in the sensitivity of meeting rainy day, snow day its brake, and the adjustment of its braking strength is more loaded down with trivial details again, thereby traveling security is reduced.

The purpose of this utility model is to propose a kind of adjustable variable speed bicycle lock, and this brake contacted with rim moment, and the sensitivity adjustment of brake is simple.

The purpose of this utility model is achieved in that a kind of adjustable variable speed bicycle lock, jaw type lock arm is arranged, brake shoe is housed on it, the hinged swing arm in the end of described jaw type lock arm, on the bolt on this swing arm top, the adjust bar that is threaded, pocketed springs on this adjust bar, the adjust bar head is installed setting nut, and described brake shoe is installed in the swing arm bottom.

The utility model is installed on the variable speed bicycle, the moment that brake shoe contacts with wheel rim during brake, brake shoe will move with rim, drive swing arm and rotate an angle around hinge, because the cross section of variable speed bicycle rim mostly is U-shaped, and two middle side parts concave into, brake shoe has changed contact angle and the area of contact with rim in the process that moves with rim, moment resistance is strengthened, braking strength is strengthened, sensitivity improves, and rotates setting nut and compresses or releasing spring, just can adjust the sensitivity of brake.

Therefore, the utility model compared with the prior art, it is little to have when brake used grip, braking is sensitive, and the advantage that can adjust easily of this sensitivity

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1, structural representation of the present utility model

The end view of Fig. 2, jaw type lock arm

Fig. 3, swing arm head scheme drawing

Fig. 4, running condition scheme drawing

Referring to accompanying drawing, adjustable variable speed bicycle lock has jaw type lock arm 1, brake shoe 11 is housed on it, the end of jaw type lock arm is through hinge 6 hinged swing arms 2, and this lock arm end is fork-shaped, has hinge axis hole 10 on it, the swing arm head is the tenon shape, have hinge axis hole on it, the adjust bar 3 that is threaded on the nut 7 of its head leaves the 3-5 mm clearance between this adjust bar and the lock arm, this gap is exactly the hunting range of swing arm, and described brake shoe is installed in the swing arm bottom.Pocketed springs 5 on this adjust bar, the adjust bar head is installed setting nut 4, and spring one end withstands on the setting nut, and the other end is pressed in the end of lock arm, plain cushion 8 can be between spring and setting nut, installed additional for setting nut rotates conveniently, also plain cushion 9 can be between adjust bar and swing arm, installed additional.During brake, brake shoe has changed contact angle and the area of contact with rim in the process that moves with rim 12, and moment resistance is strengthened, and braking strength is strengthened.

Claims

1, a kind of adjustable variable speed bicycle lock, jaw type lock arm is arranged, brake shoe is housed on it, it is characterized in that, the hinged swing arm in the end of described jaw type lock arm, the adjust bar that is threaded on the nut on this swing arm top, pocketed springs on this adjust bar, the adjust bar head is installed setting nut, and described brake shoe is installed in the swing arm bottom.

2, adjustable variable speed bicycle lock according to claim 1 is characterized in that, installs plain cushion additional between described spring and the setting nut.

3, adjustable variable speed bicycle lock according to claim 1 is characterized in that, installs plain cushion additional between described adjust bar and the swing arm.