CN2040874U

CN2040874U - Clamp rigid brake for bicycle

Info

Publication number: CN2040874U
Application number: CN 88215342
Authority: CN
Inventors: 卢洪; 李振强
Original assignee: WUYANG BICYCLE INDUSTRY CORP GUANGZHOU
Current assignee: WUYANG BICYCLE INDUSTRY CORP GUANGZHOU
Priority date: 1988-10-27
Filing date: 1988-10-27
Publication date: 1989-07-12

Abstract

The utility model discloses an improved bicycle brake, mainly comprising a base, a torsion spring, a brake tong, a screw bolt, a pull plate and a simple universal head, whose damping-effect is good, safe, and durable. The brake lining brake rubber box and the brake fork need not to be dismounted when dismounting the wheels to repair or retreating the tire. The utility model is suitable for matching with the straight edge bicycle wheel rim whose width of the tire is one and three eighth parts inches at most.

Description

Clamp rigid brake for bicycle

The utility model is a kind of improved cycle brake.

In the present cycle brake, most widely used is common lock, and it is simple in structure, firm, durable, when dismantling the wheel maintenance or changing tire, dismantle brake rubber box and lock fork, pretty troublesome.And when rim had axial wobble, brake rubber box and valve nozzle, width of cloth bar had the danger of collision.The pincerlike cable brake of some portable bicycle by the pulling of steel wire flexible cord, make two lock pincers in the brake of the two sides of rim, it has overcome the defect of common lock, but outstanding shortcoming is arranged also: insecure, the joint of steel wire flexible cord handle end is easily broken, and joint one is disconnected, the car of not stopping, will mis-use breakdown, particularly during descending brake or sudden stop easier this thing happens, become safety hazard.And, joint difficult repairing of having no progeny, it is also higher more to renew steel wire flexible cord expense.

If improve the structure of pincerlike cable brake, and use the force transfer mechanism of common lock to replace the steel wire flexible cord to spur the lock pincers, then can eliminate the shortcoming of pincerlike cable brake.The purpose of this utility model just provides a kind of pincerlike hard lock that can be used with the force transfer mechanism of common lock, and it is safe, firm, durable, needn't dismantle brake rubber box and lock fork when changing of tire or the maintenance of dismounting wheel.Principal feature of the present utility model is: it has a base that is contained on the bicycle rack, pair of bolts is passed the left and right portion of base respectively, left and right torsion spring and left and right lock pincers, the front end of two lock pincers respectively has a side channel and minor axis, the front end of two torsion springs is fixed on the base front portion, and the rear end of two torsion springs is fixed on the rear portion of two lock pincers.Plug-in mounting arm-tie between the side channel of two lock pincers, the arm-tie front end has simple Universal-head to be connected with the force transfer mechanism of the common lock of bicycle.

Specify below in conjunction with accompanying drawing:

Fig. 1 is a front view of the present utility model;

Fig. 2 is a left view of the present utility model;

Fig. 3 is a back view of the present utility model;

Fig. 4, Fig. 5 are two views of base;

Fig. 6, Fig. 7 are two views of arm-tie.

See Fig. 1,2 and 3, on cycle frame, be equipped with base (1) (because of figure line too many, so the cycle frame of the prior art of not painting among the figure), pair of bolts (2) is passed the left side of base respectively, right part passes a left side later on again, a right torsion spring (3) and a left side, right lock pincers (4), the front end of each lock pincers is provided with a side channel (5) and a minor axis (6), the front end of two torsion springs is fixed in a pair of preceding hole (7) of base front portion, the rear end of two torsion springs then is fixed in the back aperture (8) at two locks pincers rear portion, and the effect of torsion spring is to strut two locks pincers rear end two locks pincers front end is drawn close mutually.Arm-tie (9) is inserted between the side channel of two lock pincers front ends, and the arm-tie front end has simple Universal-head (10) to be connected with the force transfer mechanism of the common lock of bicycle.

Simple Universal-head is made up of preceding bolt (11), main body (12) and arm-tie regulating part (13).The arm-tie regulating part vertically is connected with main body, is cooperated with the outside thread of main body by the negative thread at its middle part, and an end of arm-tie regulating part has outside thread, flexibly connects with nut after passing the connecting bore of arm-tie front end again, can rotate in the horizontal surface direction.Before the effect of bolt be directly to be connected with the force transfer mechanism of common lock, it was not only vertical with main body but also the while is vertical with the arm-tie regulating part, and simple Universal-head can be rotated in the vertical surface direction again.In the main body, rear portion band outside thread, can in the inner bolt hole of arm-tie regulating part, revolve preceding or supination, regulate the distance of brake rubber block and rim.

Because base maintains static, the front end of left and right torsion spring also maintains static, the elastic force of torsion spring can only promote to adorn the rear end of the two locks pincers of brake rubber box and open each other, two locks pincers are respectively rotated around the bolt that passes its middle part, so the front end that has side channel, minor axis and roller (14) of two locks pincers is then drawn close mutually, snap in and clamp the left and right arc pit of arm-tie front portion from both sides, make the normal position before arm-tie is in brake.Roller is just in order to reduce friction on the short sleeve of lock pincers front end.

When braking, force transfer mechanism by common lock spurs arm-tie forward by simple Universal-head, in the arm-tie, the shape at rear portion is the arc-shaped curved surface that enlarges gradually, during the tension reach, the elastic force that overcomes torsion spring supports two locks pincers front end and more open, and because of the lock pincers rotate around the bolt that passes its middle part, two locks pincers rear end is then more and more close, when the brake rubber block that is contained in lock pincers rear end near to the width of rim the time, just make the rim stall from both sides the rim clamping.

When loosening the hand of brake, promptly remove pulling force to arm-tie, because of making two locks pincers front end, draws close mutually the elastic force of torsion spring, the arc-shaped curved surface that is enclosed within the roller compressing arm-tie both sides on the minor axis of two locks pincers front end, force arm-tie along side channel slide backward be retracted into roller and snap in and clamp the arc pit again till, meanwhile, open again again two locks pincers rear end, and rim is free to rotate again.

The utility model combines the advantage of two kinds of drgs.Because simple Universal-head can sensitively rotate, make arm-tie and lock pincers can adapt to the axial offset and the swing of rim rapidly, keep good braking effect.The utility model structure is firm, and is safe, durable.Needn't dismantle brake rubber box and lock fork when dismantling the wheel maintenance or changing tire, suitable installation is the wideest to be the straight flange rim adapted of 1 3/8 inches tires, thereby can change used 24 inches rims and 26 inches rims narrowly, and save great deal of steel and rubber for tire, spryr and light when travelling.

Claims

1, the pincerlike hard lock of force transfer mechanism bonded assembly bicycle a kind of and the common lock of bicycle, have left and right lock pincers and torsion spring, it is characterized in that the base that has one to be contained on the vehicle frame, pair of bolts is passed the left and right portion of base respectively, left and right torsion spring and left and right lock pincers, the front end of two locks pincers is respectively established a side channel and minor axis.Two torsion spring front ends are fixed on the base front portion.Two torsion spring rear ends are fixed on two locks pincers rear portion, plug-in mounting arm-tie between the side channel of two locks pincers, and the arm-tie front end has simple Universal-head to be connected with the force transfer mechanism of the common lock of bicycle.

2, the hard lock of pincer according to claim 1 is characterized in that being with roller on the minor axis of lock pincers front end.