CN87205050U

CN87205050U - Bicycle expanding brake

Info

Publication number: CN87205050U
Application number: CN 87205050
Authority: CN
Inventors: 王伸孝
Original assignee: XINAN METALLURGICAL MACHINERY PLANT
Current assignee: XINAN METALLURGICAL MACHINERY PLANT
Priority date: 1987-05-23
Filing date: 1987-05-23
Publication date: 1987-12-30

Abstract

The utility model relates to an expansion brake used in non-motor vehicles in particular to bicycles. A brake case is entirely stretched with steel plates, the diameter of the two ends of the brake case is decreased, a brake lining is an integral component which is entirely die-cast and whose section is T-shaped, and the traditional fixed shaft can be improved as a compensating shaft. The utility model has the advantages of light weight, small size, low cost, good versatility, convenient process and good brake performance.

Description

Bicycle expanding brake

The utility model relates to a kind of improved bicycle expansion brake, and this lock that rises can be used for the braking of unpowered vehicle, particularly bicycle.

The brake equipment of bicycle is a front and rear brake, and its effect is exactly to be expert at when bicycle can at any time bicycle be lowered the speed of a motor vehicle and sudden stop according to rider's wish in riding.Brake is divided into wheel rim lock and wheel hub lock two big classes according to the position of brake action, the lock that rises belongs to wheel hub lock class, the lock that rises makes the circular arc brake rubber block that the spreading motion take place radially by manual-operating mechanism, and with the whole contact frictions of inside diameter surface that are contained in the fuse-box that rises on the axle body, thereby play brake action.

The existing lock that rises is divided into two kinds from structure, a kind of is commercially available Shanghai Bicycle Factory's product, the lock shell of its lock that rises is made up of rise fuse-box and axle body two parts respectively, the two rivets together usually, there is a seam fuse-box and axle body connection place so rise, and get rusty easily, and water-proofness is poor, the lock shell volume is bigger, and the fuse-box one end internal diameter that rises is 90 millimeters; Its brake lining is with two " ┐ " type blanked parts welding or be riveted into one, because corrosion and contraposition are inaccurate, waste product is more, and " ┐ " type blanked part will be washed into through five processes, complex process, and stock utilization is low; Its support plate lid is made up of support plate and fuse-box lid two parts respectively, and the two screw by eccentric shaft and anchor shaft end fuses, so the commissure of support plate and fuse-box lid can't clean because of overlapping, drenched and corrosion by water; Because anchor shaft is fastened on fuse-box and covers, its braking is by reversing of eccentric shaft two brake linings to be strutted, rub so have only the brake rubber block at eccentric shaft place to contact, and most brake rubber block does not have not contact with the fuse-box internal diameter and plays brake action with the fuse-box inside diameter surface.Therefore, its deceleration and stopping performance is relatively poor.Another kind is commercially available Tianjin Bicycle Factory's product, support plate, the fuse-box lid, brake lining, the braking mode of balance staff arm and brake lining is identical with the product of Shanghai Bicycle Factory, fuse-box and axle body are integrated but it will rise, for integrally stretching forms, the internal diameter of its fuse-box still is 90 millimeters, the external diameter of small end is by 24 millimeters reamings to 32 millimeter, and this structure has overcome the Shanghai lock axle body that rises and easily got rusty with the fuse-box seam that rises, the shortcoming of water-proofness difference, however still exist volume excessive, body is overweight, commonality is poor, can not be applicable to steamboat footpath vehicle, and cost is higher, problems such as deceleration and stopping performance is bad, and because of reaming makes complex process, concentricity is difficult for reaching requirement, influences the precision of product.

In view of the problem that above-mentioned prior art exists, task of the present utility model is a kind of lock that rises with good deceleration and stopping performance of design, and makes its weight saving, volume-diminished, profile is small and exquisite attractive in appearance, processes easy, with low cost, good waterproof performance has good commonality and Applicable scope widely.

The utility model is to be used for unpowered vehicle, the lock that rises of bicycle brake particularly, and the lock that rises comprises that two ends have the lock shell of the diameter that varies in size.The lock shell is a global facility, the internal diameter of its big end is between the 65-80 millimeter, the external diameter of its small end has a left axle cap concentric with it in the big end of lock shell between the 16-24 millimeter, its outer support plate lid is by fuse-box lid and the incorporated global facility of support plate.The brake lining that the sticking or riveting of two symmetrical circular arcs has brake rubber block is housed in support plate lid the inside, brake lining is the monoblock that the cross section is T-shape, the lower end surface of two brake linings is to leaning against on the compensating shaft, the hole that the compensating shaft end covers by support plate, the aperture in this hole is greater than the diameter of compensating shaft end, it is local movable that compensating shaft can be done in the support plate lid, the upper end end face of brake lining is to leaning against on the eccentric shaft, eccentric shaft can freely rotate in sleeve pipe, the part that eccentric shaft is exposed at support plate lid outside links with an end of balance staff arm, the other end of balance staff arm connects with the brake lever steering unit, small end at the lock shell has a floral disc that is mated, an axle bowl is respectively arranged in floral disc and left axle cap, in the axle bowl ball is arranged, outside the axle bowl cover of dust is arranged.

The lock that rises of the present utility model has two so that the compensator spring that compensating shaft resets in that support plate lid is inboard, and compensator spring is fixed on the compensation backing plate, and it is inboard that the compensation backing plate is fixed on the support plate lid.

The lock that rises of the present utility model, there is retracing spring at the place at the balance staff arm, has covered limiting stopper at support plate.

The lock that rises of the present utility model because the lock shell is a global facility, makes it have favorable waterproof property, and reducing of lock shell two ends diameter improved drawing process, saved material, reduced the plating area, reduced cost; Because brake lining is the monoblock of die cast, has simplified technology, makes the brake lining one-shot forming, the yield rate height, and make weight saving, and brake lining of the present utility model can also be general with the motor bike brake lining, and Applicable scope is more extensive; Because the support plate lid is integrated fuse-box lid and support plate, has saved material, has reduced three process and electroplated area; The lock that rises of the present utility model the anchor shaft of prior art is improved to compensating shaft, and the main difference of anchor shaft and compensating shaft is that the former is fixed, has only local brake rubber block to play brake action; It is local movable that the latter can do in the support plate lid, at glancing impact, along with reversing of eccentric shaft, the brake lining at eccentric shaft place is spreading radially, when the brake rubber block on the brake lining herein contacts with lock shell internal diameter after the friction force that produces reaches maximum, forces the compensating shaft displacement, make two semicircle brake linings radially to around spreading, thereby make whole brake rubber blocks and the big end inside diameter surface of lock shell uniform contact, increased the contact surface that produces friction greatly, significantly improved the deceleration and stopping performance of the lock that rises thus.

The effect of compensator spring and retracing spring is to make the balance staff arm of compensating shaft make its homing after finishing braking maneuver.Work as glancing impact, limiting stopper can limit the position of balance staff arm swing, it is unlikely surpasses the swing limit.

Below with reference to accompanying drawing the utility model is described in further detail, accompanying drawing is a specific embodiment of the utility model.

Description of drawings:

Fig. 1 lock front elevation that rises

Fig. 2 brake structure sectional side elevation that rises

Fig. 3 rise lock brake lining front elevation and A-A cutaway view

Fig. 4 rise brake compensator front elevation and A-A cutaway view

Fig. 5 lock front carrier plate lid front elevation that rises

In Fig. 1, the support plate lid (9) that shows the lock that rises is fixed on the front fork or back chain stay of bicycle itself, also can be regarded as this lock that rises and to be used in various organization plans, balance staff arm (12) connects with the brake lever steering unit, on the flange of the big end of lock shell cylindrical void is arranged, be used to install the spoke of bicycle, support plate has covered a limiting stopper (15), and a retracing spring (20) is arranged on the balance staff arm.

In Fig. 2, lock shell (5) is to be formed by the steel plate integrally stretching, the internal diameter of its big end is 70 millimeters, the external diameter of its small end is 18 millimeters, there is long centre hole at the center of lock shell, to hold extended axle (16), floral disc (2) matches with the small end of lock shell, cylindrical void is arranged on the floral disc, in order to fixed spoke, left side axle cap (6) is fixed in the big end of lock shell by force fit, and it is concentric with it, in floral disc (2) and left axle cap (6), an axle bowl (3) is arranged respectively, can hold a plurality of balls (4) in the axle bowl, a cover of dust (1) is respectively arranged outside it, so that ball sealing, ball is separated by the bearing locating rack, partly to reduce the phase mutual friction between ball, improve sensitivity, also bring convenience to assembling, the bearing locating rack is placed in the axle bowl prior to ball, locating rack has the pore volume of respective numbers to receive ball, location bearing and self-lubricating is provided thus, two symmetrical circular arc brake linings (13) are equipped with in support plate lid (9) the inside, compensating shaft (8) is terminal by hole (17), it is inboard that compensation backing plate (19) is fixed on the support plate lid, two relative rising between the brake lining, with two coil springs (7) tension, the end face of the brake lining that rises is close on eccentric shaft (10) and the compensating shaft (8), eccentric shaft can freely rotate in the sleeve pipe (11) of support plate lid, the part that eccentric shaft is exposed at support plate lid outside links to each other with the balance staff arm (12) of the lock that rises, the screwed axles in two ends (16) are inserted by the centre hole of lock shell (5), and two ends respectively add axle shelves to be fixed, in order to avoid the axle side travel, axle shelves external application locknut, packing ring, nut is fastening, comes bolster (16) with any known feasible bearing method.

Brake lining among Fig. 3 (13) is with non-metals integral die-cast moulding such as cast aluminiums, the cross-sectional plane of brake lining is T-shape, and brake rubber block (14) is made of as containing rubber, asbestos and phenolic aldehyde or any appropriate materials that is generally used for the brake rubber block structure wear-resisting and the generation friction material elastomeric material.

Fig. 4 is the brake compensator that rises, compensation backing plate (19) is fixed on support plate lid (9) inboard by the riveted joint mode, on the compensation backing plate four teeth going out are arranged, with fixed compensation spring (18), compensating shaft (8) is terminal by hole (17), it is riveted on the compensating shaft packing ring (21), and compensating shaft and packing ring can be movable in hole (17).

Fig. 5 is the whole stamping forming front carrier plate lid of steel plate (9), support plate has covered two reinforced ribs, the necessary in-line of the centre hole that support plate covers, eccentric pivot hole and compensation axis hole, wherein compensating axis hole (17) is elongated hole, so that compensating shaft can be movable within the specific limits, limiting stopper (15) is a whole punch components with the support plate lid, and the front carrier plate lid is fixed on the front fork of bicycle.

When bicycle is expert at when riding state, the position of eccentric shaft (10) is to make the upper end of lock brake lining be retracted to minimum diameter because of the pulling force that is subjected to spring, rise brake rubber block (14) and lock shell (5) held between the inside diameter surface greatly and maintained a certain distance, the lock shell must rotate freely with wheel, work as glancing impact, rider's brake lever of holding with a firm grip, the lock balance staff arm (12) that rises is reversed by steering unit tension drive eccentric shaft (10), eccentric shaft struts two brake linings (13), when the brake rubber block at eccentric shaft place contact with the big end inside diameter surface of lock shell rub after, force compensating shaft (8) displacement, so that all brake rubber block (14) contacts with the big end inside diameter surface of lock shell, this moment, the friction force maximum also produced optimum braking effect.

Every pair of lock that rises of the utility model has reduced the weight about 500 grams, and cumulative volume has reduced 30cm³, bicycle is the trend of world's bicycle industry to the lightweight development, because the reduction of the lock weight that rises will reduce the deadweight of bicycle greatly, reduces riding resistance, enlarges the scope of riding; Owing to dwindling of the lock volume that rises, as long as change the bar hole count of floral disc, namely applicable to various different wheels vehicles directly, good versatility is arranged; Because the change of structure operation improves machining accuracy, water resistance is good, and has saved raw material, has reduced cost, if adopt the lock that rises of the present utility model, just this millions of units that can economize on the use of funds, nearly 7000 tons of saving steel whenever are only in the whole nation on producing. The lock that rises of the present utility model, profile is small and exquisite attractive in appearance, processes easyly, and braking ability is good.

Claims

1, a kind of unpowered vehicle that is used for, the lock that rises of bicycle brake particularly, comprise that two ends have the lock shell (5) of the diameter that varies in size, a left axle cap (6) concentric with it is arranged in the big end of lock shell, there is a fuse-box lid to be fastened on front fork or the back chain stay outside it by support plate, sticking or the riveting that two symmetrical circular arcs are housed in fuse-box lid the inside has the brake lining (13) of brake rubber block (14), the lower end surface of two brake linings is to leaning against on the compensating shaft (8), the upper end end face is to leaning against on the eccentric shaft (10), eccentric shaft can freely rotate in sleeve pipe (11), the part that eccentric shaft is exposed at fuse-box lid outside links with an end of balance staff arm (12), the other end of balance staff arm connects with the brake lever steering unit, small end at the lock shell has a floral disc that is mated (2), and an axle bowl (3) is respectively arranged in floral disc and left axle cap.In the axle bowl ball (4) is arranged, outside the axle bowl cover of dust (1) is arranged, of the present utility model being characterized as: lock shell (5) is a global facility, the internal diameter of its big end is between the 65-80 millimeter, the external diameter of small end is between the 16-24 millimeter, and brake lining (13) is the monoblock that the cross section is T-shape, and support plate lid (9) is lock cap and the incorporated global facility of support plate, compensating shaft (8) is terminal by the hole (17) on the support plate lid (9), and the aperture of hole (17) is greater than the diameter of compensating shaft end.

2, the lock that rises according to claim 1, it is characterized by in that support plate lid is inboard has two so that the compensator spring that compensating shaft resets (18), and compensator spring is fixed on the compensation backing plate (19), and it is inboard that the compensation backing plate is fixed on the support plate lid.

3, according to the described lock that rises in one of claim 1 or 2, it is characterized by at balance staff arm (12) and located retracing spring (20), on the support plate lid (9) limiting stopper (15) is arranged.