CN2147175Y

CN2147175Y - Improved bicycle brake

Info

Publication number: CN2147175Y
Application number: CN 93200329
Authority: CN
Inventors: 钟哲玄
Original assignee: Lubao Commercial & Industrial Co Ltd
Current assignee: Lubao Commercial & Industrial Co Ltd
Priority date: 1993-01-09
Filing date: 1993-01-09
Publication date: 1993-11-24
Anticipated expiration: 2003-01-09

Abstract

The utility model relates to an improved bicycle brake. A polygonal slot is formed on the joint of a brake swinging arm, the polygonal slot is penetrated with a sleeve barrel, the outer wall of the sleeve barrel is also the same polygon, a clearance is formed between the outer wall of the sleeve barrel and the polygonal slot, and elastic rubber with high intensity is filled in the clearance respectively. When the swinging arm is rotated to brake, the outer wall of the sleeve barrel presses the rubber, and when a brake wire is relaxed, the swinging arm restores to the original state via the recovering elastic force of the rubber. The structure can promote the efficiency of assembly, and when the brake wire is broken accidentally, the swinging arm can not rub a wheel rim because of the positioning of the rubber, which can avoid the occurrence of matters which is harmful to safety.

Description

Improved bicycle brake

The utility model relates to a kind of bicycle brake drg of improvement, it mainly is to form a square groove at brake swing arm pin joint part, be arranged with an outer wall therebetween and also be square sleeve, the mat sleeve is placed in the swing arm pivot on the breeches pipe fixed block, wherein be forced into flexible rubber respectively in sleeve outer wall and the square groove gap, so that the elasticity recovery after brake cable discharges to be provided to swing arm, improve packaging efficiency and guarantee traffic safety with these textural associations.

Brake actuator is one of indispensable part on the bicycle, existing structure roughly as shown in Figure 5, it mainly is to form pertusate nose bar 31 respectively at a breeches pipe fixed block 30 two ends, on two nose bars 31 respectively pivot overlap a

swing arm

32,33, two

swing arms

32,33 and cross-shaped mutually, wherein

swing arm

32,33 centre are formed with pivot hole 320 respectively, 330, be arranged with sleeve 321 on it, 331, pad 322,332 etc., and mat screw rod 323,333 and nut 324,334 with

swing arm

32,33 pivots are fixed on the breeches pipe fixed block 30, swing arm 32 again, on 33, the lower end is set up wiring hole 325 separately, 335 and the brake footwear 326,336, wherein wiring hole 325,335 are connected on the brake cable 34, distinguish sheathed spring 35 again on two nose bars 31 of breeches pipe fixed block 30, breeches pipe fixed block 30 and

swing arm

32,33 inboards are formed with projection 36 respectively, 327,337, spring 35 two ends are pushed up respectively be formed on breeches pipe fixed block 30 and two swing arms 32, projection 36 on 33,327,337, so that with two

swing arms

32,33 support laterally, again because of the traction of brake cable 34, must be with two

swing arms

32,33 are limited on the location, when brake cable 34 makes progress drawing, two

swing arms

32,33 promptly are pivoted relative to each other, make the brake footwear 326 of its lower end, 336 folders are to wheel rim, to produce braking effect, after brake cable 34 discharged, then the back stretch that provides by spring 35 made

swing arm

32,33 restore to the original state.

Though can provide the bicycle brake function with above-mentioned brake actuator structure, but structurally still difficult title is thoughtfully perfect, at first from the above, with regard to

swing arm

32,33 structures, must reach many group pads 322,332 by installing sleeve 321,331 on its pivot hole 320,330, and, begin to such an extent that assemble fully in breeches pipe fixed

block

30 and 32,33 also necessary mounting spring 35 respectively of two swing arms, because its component parts is more, will cause package program to lack efficient.

The doubt of safety is also arranged with these brake actuator structures again, mainly be after brake cable 34 is discharged, can return back to original position really because of this brake actuator, be in breeches pipe fixed block 30 and two swing arms 32, the sheathed spring 35 of difference on 33, it supports mat elastic force and gives

swing arm

32,33 recovery capacity, it is that mat brake cable 34 is with on drawing to a location when normal use, when brake cable 34 once again during drawing, two

swing arms

32,33 promptly make relative clipping brake shape, when discharging, it then removes because of the pressure of bestowing spring 35, must make swing arm return back to place, former location, but when broken string takes place in brake cable 34, two

swing arms

32,33 will continue to flip to the outside because of spring 35 elastic force, cause two swing arms 32 eventually, 33 tool wiring holes 325, the staggered wheel rim (as shown in Figure 6) that is flapped toward of an end of 335, produce friction with wheel rim, except that the influence driving is smooth and easy, the anxiety that endangers safety is also arranged; So from the above, existing brake actuator mat spring provides the structure kenel of swing arm elasticity recovery, will influence traffic safety when broken string takes place brake cable, so the own utmost point part to be improved of this brake structural.

Main purpose of the present utility model is: provide a kind of and assemble rapid facility and can prevent to break that time brake buckle goes into the bicycle brake drg of the improvement of wheel rim, it mainly is to be pivoted with a swing arm respectively at breeches pipe fixed block two ends, this swing arm pin joint part is formed with square groove, and to be equipped with an outer wall be square sleeve, the gap of this sleeve and square groove is forced into the rubber of high strength elastic respectively, through fixing with screw rod and breeches pipe, promptly get and finish assembling, and it is because of the location of rubber, can not make swing arm friction wheel rim, the thing that can avoid endangering safety takes place.

The utility model provides a kind of bicycle brake drg of improvement, it mainly comprises swing arm, sleeve, brake footwear, the pin joint part of swing arm is formed with the polygon groove, be arranged with an outer rim in this polygon groove and also be polygonal sleeve, its middle sleeve is to be inserted in the polygon groove with mutual staggered positions, insert respectively in the gap that forms between itself and polygon groove and have high-intensity elastomeric material, so that locate this swing arm, and the one back stretch is provided.

Advantage of the present utility model mainly is to form the polygon groove at the swing arm pin joint part, therebetween wear sleeve, and sleeve is fixed on the breeches pipe fixed block, and the gap of sleeve and polygon groove is forced into high strength, elastic caoutchouc, can finish assembling, this practice not only makes the package program on the manufacturing line have more efficient, make outside productive costs significantly reduces, and when the broken string accident takes place in brake cable, also do not possess the elastic force that supports laterally because of two swing arms, can not make swing arm be flapped toward wheel rim and impact safe thing, hence one can see that, and the utility model mat is established rubber to give the swing arm back stretch between square groove and sleeve, uses in part and go up far fewer than existing drg, satisfy on package program must existing drg more to attain efficient rapid, and can guarantee the safety used.

Further specify architectural feature of the present utility model and purpose below in conjunction with accompanying drawing.

Brief Description Of Drawings:

Fig. 1 is an exploded drawings of the present utility model.

Fig. 2 to Fig. 4 is a part sectional view of the present utility model.

Fig. 5 is the exploded drawings of existing brake actuator.

Fig. 6 is the action scheme drawing of existing brake actuator.

Relevant structure of the present utility model partly, please at first consult shown in Figure 1, it mainly is to be formed with the polygon groove respectively at a swing arm 10 lower ends, it is a square groove 11 in present embodiment, be arranged with a sleeve 12 in this square groove 11, sleeve 12 centers are formed with perforation, can overlap on the loop bar 101 that is fixed in the breeches pipe fixed block, and with its firm combination, sleeve 12 outer rims are square-shaped again, and are inserted in the square groove 11 (please cooperate consult shown in Figure 2) to differ the 45 degree mode that staggers mutually, make sleeve 12 around edge form leg-of-mutton gap with square groove 11 respectively, in this gap respectively to have high strength, elastomeric rubber 13 is filled in, to fill up this gap; These sleeve 12 external side ends form a hollow bulge loop 120 again, are arranged with enclosing cover 14 on this hollow bulge loop 120, and this enclosing cover 14 is provided with pad 15, and passes sleeve 12 with screw rod 16, so that swing arm 10 is fixed on this loop bar 101 (as shown in Figure 3); Swing arm 10 upper ends must be connected with brake cable again, and its side also is provided with brake footwear 17.

More than state as can be known bright, the utility model only must be inserted in sleeve 12 in the square groove 11 of swing arm 10, and therebetween be forced into rubber 13 respectively, can finish assembling in conjunction with enclosing cover 14 again, it is convenient very rapidly on assembly program, the manner of execution of this swing arm 10 sees also shown in Figure 2 again, when swing arm 10 is the brake cable drawing, it is that swing to the inside in the axle center with loop bar 101, and brake footwear 17 are pressed from both sides to wheel rim to produce brake, this swing arm 12 is to be that the axle center is anticlockwise and pivots with loop bar 101 when swinging, please cooperate shown in Figure 4ly, when swing arm 10 was anticlockwise and rotates, also pushed with anticlockwise and the rubber 13 of 12 in sleeve in each corner of its square groove 11, because stopping of sleeve 12 outer walls, rubber 13 bears one and pushes pressure when swing arm 10 pivots, treat that brake cable is released after, swing arm 10 upper end pulling force are removed, rubber 13 in the square groove 11 makes swing arm 10 return back to original position with its elasticity, and removes brake.

Claims

1, a kind of bicycle brake drg of improvement, comprise swing arm, sleeve, brake footwear, it is characterized in that: the pin joint part of swing arm is formed with the polygon groove, be arranged with an outer rim in this polygon groove and also be polygonal sleeve, its middle sleeve is to be inserted in the polygon groove with mutual staggered positions, inserts this swing arm of location in the gap that forms between itself and polygon groove respectively and provides having of one back stretch high-intensity elastomeric material.