CN2049209U

CN2049209U - Bicycle braking device

Info

Publication number: CN2049209U
Application number: CN 89202468
Authority: CN
Inventors: 陈月辉
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-03-10
Filing date: 1989-03-10
Publication date: 1989-12-13

Abstract

The utility model relates to a bicycle braking device which is characterized in that the braking device is a wedging mechanism, a wedged braking block and a swallow-tailed braking block box are arranged in a braking slideway box in the shape of a dovetail groove, and the wedged braking block and the swallow-tailed braking block box can slide in the braking slideway box. The braking slideway box is fixedly arranged on a forcipate brake rack or a forked pulling rack, and the bottom surface of the braking slideway box approaches to a steel ring with a wedged angle along the rotation direction of bicycle wheels. The braking block can contact the bicycle wheels to generate friction during braking, the braking block box can slide in the braking slideway box in a wedging way, and thus braking sensitivity is enhanced.

Description

Bicycle braking device

The utility model is a kind of brake equipment of bicycle, and this device is that the common and rubber brake block of a kind of wedging formula mechanism is combined into braking device.Bicycle brake system, comprise and be installed in bicycle handle bar brake handle on hand, driver's handle and the fork-shaped drawbar frame of rubber brake block has been installed or pincerlike brake rack between by lever, the force transfer mechanism that connecting rod or steel rope are formed, with the mechanism that behind the releasing of brake handle fork-shaped drawbar frame or pincerlike brake rack is resetted, when drag, thereby brake weight passes to by force transfer mechanism and makes peace rubber brake block thereon compress the wheel steel ring radially or from wheel steel ring both sides on fork-shaped drawbar frame or the pincerlike brake rack to realize braking, existing brake actuator only is to pass through force transmission mechanism, make the friction of rubber brake block and bicycle quick steel ring, thereby reach the purpose of brake, the braking effect of this structure control and hand have direct relation to the grip size of brake lever.Therefore exist problems such as brake is required great effort, the brake sensitivity is not high.I number am 88108088.8 to have proposed a kind of brake equipments design of climbing roller principle in Chinese patent application, can reach the purpose that improves the brake sensitivity, but this structure am present in the compact inadequately influence of structure weak point attractive in appearance on the pincerlike lock.

The purpose of this utility model provides a kind of brake shoes tape the one side location, and another side is the bicycle brake system that can do the wedge-type slippage.This brake equipment can reach in the less brake system that can be widely used in pincerlike lock and common fork-shaped traction lock of rapid operation, the highly sensitive volume again of brake, especially is suitable on the pincerlike lock.

In order to achieve the above object, solution of the present utility model is: the rubber brake block of wedge shape is installed in the brake shoes box of a formation dovetail form, in the brake chute box of the dove-tail that can slide within it, brake chute box then is fixedly mounted on pincerlike brake rack or the fork-shaped drawbar frame and dovetail form brake shoes box is packed into.The brake chute box mounting plane of said pincerlike brake rack has angle along the brake driving surface of wheel direction and steel ring, brake slideway bottom surface after promptly installing along the wheel direction to steel ring near becoming an angle of wedge, like this when brake when rubber brake block with after steel ring contacts, because the friction force between them, make rubber brake block and dovetail form brake shoes box with the wheel a bit of distance of in rotational direction moving, in this motion process, because brake chute box has the effect of an angle of wedge for the wheel steel ring, make described brake shoes box and rubber brake block in the wheel circumferential movement, compress bicycle rim along a side direction or a radially nearly step, thereby a nearly step increases braking force, wheel is braked rapidly, leaned on spring from horizontal reset when unclamping then this wedging formula of rim brake braking mechanism.

Accompanying drawing 1 is wedging formula bicycle brake system integral structure and scheme of installation.This figure is a Figure of abstract.

Accompanying drawing 2 is lateral plans of the pincerlike lock of wedging formula mechanism

Accompanying drawing 3 is cross section structure scheme drawings of wedging formula braking mechanism

Accompanying drawing 4 is axle side scheme drawings of dovetail form brake shoes box

Accompanying drawing 5 is wedge shape rubber brake block axle side scheme drawings

Accompanying drawing 6 is brake chute box axle side scheme drawings that pincerlike lock is used

Accompanying drawing 7 is the antitorque support scheme drawings of pincerlike brake rack

Accompanying drawing 8 is pincerlike brake rack schematic top plan view of wedging formula mechanism

Accompanying drawing 9 is scheme of installations that wedging formula self brake device is used on the normal traction lock

Accompanying drawing 10 is birds-eye vieies of accompanying drawing 9

Accompanying drawing 11 is anti-attrition pad scheme drawings

Accompanying drawing 12 is the brake chute box axis of no-feathering side scheme drawings that are used to draw lock

Wedge-shaped rubber brake shoes 1 is to be contained in the dovetail shaped brake shoes box 2 as can be seen from Figure 1, and dovetail shaped brake shoes box is packed in the brake chute box 3 of the dove-tail that can slide within it, brake chute box then is fixedly mounted on pincerlike brake rack 5(8 with bolt 6) on, in order to make pincerlike lock can bear big brake weight, at brake chute box 3 and pincerlike brake rack 5(8) between the antitorque support 4 of lock frame also is housed.Pincerlike brake rack is installed in by bolt 7 on the crosspiece 15 of bicycle crotch, and 10 is signal bicycle rims among the figure, and arrow is represented the wheel movement direction, and sequence number 11 is traditional brake cables, and the 9th, brake cable set screw, the 12nd, brake cable holding screw.Also find out significantly from Fig. 1, brake shoes 1 not glancing impact remains on an end reference position of the updrift side brake chute box that relative wheel rotates, it is adjustable slotted hole that brake chute box is installed screw 17(actual with respect to the pincerlike brake rack brake shoe) be biasing, its Offset preferably equals half of the sliding length of the effective wedge of slideway.

The antitorque support of non-as can be seen from Figure 2 braking mode time gating frame should and bicycle rear fork frame 13 between a gap A is arranged, generally can be at the 2-3 millimeter.When emergency braking, antitorque support will prop up on the crotch 13, can prevent that the lock frame from turning round badly, also improve the brake reliability, and 16 is traditional lock frame return springs among the figure.

There is the elongated slot of a dress reset tension spring 18 at the back side that the brake shoes box 2 of wedge shape rubber block 1 is installed as can be seen from Figure 3, one end hook of reset tension spring is on the aperture on the brake shoes box 20, the other end then is hooked on the extension spring hole 19 on the slideway box 3, remains on initial positioning end when making the non-braking mode of brake shoes box.8 is brake shoes box effective sliding distances in brake chute box among the figure.Arrow a is the wheel direction, and arrow b is the sense of motion of brake shoes.The line of centers of screw is installed among the figure is as can be seen setovered for slideway box length direction, its Offset is half of the effective sliding distance of brake shoes box preferably.Sequence number 14 is nonmetallic anti-wear gasket sheets among the figure.In order to keep the sensitivity of this machine, suitable proper lubrication in the use.

Brake shoes box 2 constitutes swallowtail shape by side 22 corresponding containing rubber brake block as can be seen from Figure 4, the angle theta of its dovetail is between 30 °-45 °, in the punching press of the back side of brake shoes box the concave elongated 21 of adorning extension spring is arranged, the aperture 20 of extension spring is arranged at the front end bottom land.

There is the dovetail form base shape 23 that contains for the brake shoes box at the back of wedge-shaped rubber brake shoes 1 as can be seen from Figure 5, and the back side hold in addition stamped recess 21 on the brake shoes box occur inwards convex ridge and prefabricated elongated slot 24.α is that the angle of wedge is between 10 °-20 ° among the figure.

Brake chute box 3 as can be seen from Figure 6, its dual-side 25 be used to contain dovetail form brake shoes box it is become the brake shoes box is slided, make the adeciduate dove-tail slideway of brake shoes box again.At the inclined to one side middle part of brake chute box an outward flange is arranged, see it is the groove 27 of a heavy screw head internally, there is screw 26 centre, at the long end of the slideway of the screw of setovering relatively.At the aperture 19 that the hook extension spring is arranged by the groove head.

Have in the antitorque support 4 of lock frame as can be seen from Figure 7 to install and regulate slotted hole 28, the angle β of its bending should be 90 ° and subtract locking angle, so the β angle is between 70 °-80 °.

Use the pincerlike brake rack 5(8 of wedging formula mechanism as can be seen from Figure 8) it is characterized in that installing brake shoes the ears or side handles of a utensil inner plane 29 must and formation locking angle identical in wheel steel ring side with rubber brake block.

As can be seen from Figure 9, wedging formula mechanism is fastened on the traction crotch 31 at ear handle 37 and the bolt 32 by slideway box 30 upper sides on the normal traction lock, and ear handle 37 is to setover towards the downstream direction of wheel movement on the slideway box, and its Offset is preferably half of the sliding amount of the effective wedge of brake shoes box.Be subjected to the effect of extension spring 18 to remain on the initiating terminal (referring to Fig. 3) of brake chute box at non-braking mode brake shoes box 2.34 is signal bicycle flanges among the figure, and brake guiding hangers 33 usefulness screws 39 fix on bicycle rear fork frame 40.35 is the original eye hitcies of bicycle among the figure, sequence number 34 expression bicycle flanges, and arrow is expressed as the wheel rotation direction, and sequence number 36 is brake guide posts.

As can be seen from Figure 10 the ear handle on the brake chute box 30 outwards folding certain angle is arranged, its objective is that to require to make the fricting working surface of brake shoes 1 and wheel rim brake driving surface substantially parallel.The included angle X of two guide post 36 formation depends on the shape of wheel rim 34, and the λ angle is generally between 35 °-45 °.

Drawing the slideway box used on brake chute box 30 that lock uses and the pincerlike lock as can be seen from Figure 11, different is that it does not have groove 27, but its side many installation ear handle 37, sequence number 38 is to hang the aperture of extension spring.The brake chute box that traction is used on the lock since the relation of ear handle installation direction also divide about two kinds.Side 41 contains into the requirement of dovetail slideway with the same described in Fig. 6.

The elongated slot 42 that the extension spring activity is arranged on the anti-attrition pad as can be seen from Figure 4.

Embodiment: Fig. 1 and Fig. 2 represent to use on the pincerlike lock most preferred embodiment of wedging formula bicycle brake system of the present utility model, can analyze, though when operation rim brake power reaches brake shoes contact bicycle rim by brake cable is diminishing efficiency, but owing to be light load, less with force feeling, and when brake brake shoes contact bicycle flange, produce friction, the part kinetic energy that bicycle quick rotates makes brake shoes do the slippage of wedging formula together with the brake shoes box in brake chute box, can produce very big brake weight, but this force feedback also is diminishing efficiency and become less so brake labour-saving income is arranged to hand, and improved the brake sensitivity, also because the effect of the antitorque support of lock frame, thereby make pincerlike lock overcome the weak point that can only adapt to less brake weight.

The wedging formula brake equipment that second embodiment such as Fig. 9, Figure 10 express is used for the situation of common fork-shaped traction lock, and the lock frame that fork-shaped lock frame 31 can be complete with traditional is identical, sincerely can reach superior braking function with the traditional brake shoes of present technique replacing.

Claims

1, a kind of bicycle brake system, comprise and be installed in bicycle handle bar brake handle on hand, brake handle and the fork-shaped drawbar frame of rubber brake block has been installed or pincerlike brake rack between by lever, the force transfer mechanism that connecting rod or steel rope are formed, with the mechanism that behind the releasing of brake handle fork-shaped drawbar frame or pincerlike brake rack is resetted, when drag, thereby brake weight passes to by transmission mechanism and makes peace rubber brake block thereon compress the wheel steel ring radially or from wheel steel ring both sides on fork-shaped drawbar frame or the pincerlike brake rack to realize braking, it is characterized in that, said rubber brake block is a wedge shape, it is indoor that it is installed in a dovetail form brake shoes box, dovetail form brake shoes box is to pack in the brake chute box of the dove-tail that can slide within it, brake chute box then is fixedly mounted on pincerlike brake rack or the fork-shaped traction lock frame, the brake chute box mounting plane of said pincerlike brake rack has angle along wheel direction and steel ring brake driving surface, brake chute box slideway bottom surface after promptly installing along the wheel direction to steel ring near becoming an angle of wedge, and the maintenance of rubber brake block driving surface is parallel with the brake driving surface of wheel steel ring, like this when brake when rubber brake block with after steel ring contacts, because the friction force between them, make rubber brake block and dovetail form brake shoes box with the wheel a bit of distance of in rotational direction moving, in this motion process, because brake chute box has the effect of an angle of wedge for the wheel steel ring, make described brake shoes box and rubber brake block in the wheel circumferential movement, along side direction or radially further compress bicycle rim, thereby further increase braking force, wheel is braked rapidly.

2, by the described brake equipment of claim 1, it is characterized in that dovetail form brake shoes box under action of the spring, make the brake shoes box remain on the initiating terminal of brake chute box at glancing impact not.

3,, it is characterized in that said brake chute box is 10 °-20 ° with the bicycle rim brake angle of wedge that driving surface became by the described brake equipment of claim 1.

4, by the described brake equipment of claim 1, it is characterized in that rubber brake block is the shape of wedge, its angle of wedge size is consistent with the bicycle rim brake angle of wedge size that driving surface became with brake chute box.

5,, it is characterized in that the installation of brake chute box is setovered to the updrift side of wheel with respect to pincerlike brake rack or fork-shaped drawbar frame line of centers by the described brake equipment of claim 1.

6,, it is characterized in that described Offset preferably equals half of the sliding amount of effective wedge by the described brake equipment of claim 5.

7, by the described brake equipment of claim 1, it is characterized in that having between slideway box and the pincerlike brake rack the antitorque support of a pair of lock frame.