CN101457804A

CN101457804A - Stopping caliper

Info

Publication number: CN101457804A
Application number: CNA2008102461045A
Authority: CN
Inventors: 李成
Original assignee: SAIC Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2008-12-22
Filing date: 2008-12-22
Publication date: 2009-06-17
Anticipated expiration: 2028-12-22
Also published as: CN101457804B

Abstract

The invention belongs to the technical field of vehicle brake parking, in particular to a parking clamp. The invention comprises a movable brake block and a fixed brake block arranged on a clamp body; one end of the movable brake block is fixed on a piston; the piston is arranged in the concave cavity of the clamp body and can move along a direction limited by the concave cavity; the end of the piston far away from the movable brake block is provided with a cam transmission mechanism; the cam transmission mechanism is fixed on the clamp body, is driven to rotate by a draw arm, and pushes the piston to move along the direction limited by the concave cavity. According to the technical scheme, in the clamp, the drive mechanism of the movable brake block is set as the cam transmission mechanism, and a more ideal input-output relation can be obtained by using the controllability of a cam profile, thereby obtaining a more stable brake torque; moreover, the cam transmission mechanism has high reliability, fewer parts and simple structure, thus being suitable to be mounted in narrow and compact working environment in particular.

Description

A kind of stopping caliper

Technical field

The invention belongs to automobile brake Parking technical field, be specifically related to a kind of stopping caliper.

Background technique

The principal mode of automobile parking device is drum-type Parking Brake and disc-drum parking brake in the prior art, above-mentioned two kinds of defectives that parking device all exists some to be difficult to overcome, for drum brake, its braking moment instability, theoretical calculation is difficulty comparatively, and input power-ouput force is basic to be determined according to test; And for the dribbling drum brake, because all multiple components such as drum brake inside brake shoe, torque arm and return spring have occupied very large space, make the dribbling drum brake that great difficulty be arranged when arranging, using under the circumstances of third generation hub bearing the more apparent anxiety of the installing space of parking device more and more on the automobile at present.

Summary of the invention

The purpose of this invention is to provide a kind of stopping caliper, its braking moment is stable, and controllability is good, and is simple in structure and reliability is high.

For achieving the above object, the present invention has adopted following technological scheme: a kind of stopping caliper, comprise the movable brake slipper that is arranged on the caliper body and fixing brake slipper, one end of movable brake slipper is fixed on the piston, piston is arranged in the cavity of caliper body and can moves along the direction that cavity limits, end away from movable brake slipper of piston is provided with cam drive, cam drive is fixed on the caliper body, cam drive is by the torque arm rotary driving, and the promotion piston moves along the direction that cavity limits.

As shown from the above technical solution, the driving mechanism of the movable brake slipper of the present invention is set to cam drive, utilizes the controllability of cam type surface just can obtain comparatively desirable input/output relation, and then can obtain comparatively stable braking moment; And cam drive reliability height, component are few and simple in structure, are particularly useful for being installed in the narrow and small compact working environment.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the braking state schematic representation of stopping caliper;

Fig. 3 is the released state schematic representation of stopping caliper;

Fig. 4 is a stereoscopic-state schematic representation of the present invention;

Fig. 5 is the schematic representation of stroke control mechanism.

Embodiment

As shown in Figure 1, a kind of stopping caliper, comprise the movable brake slipper 20 that is arranged on the caliper body 10 and fixing brake slipper 30, one end of movable brake slipper 20 is fixed on the piston 40, piston 40 is arranged in the cavity of caliper body 10 and can moves along the direction that cavity limits, and the end away from movable brake slipper 20 of piston 40 is provided with cam drive, and cam drive is fixed on the caliper body 10, cam drive is by torque arm 60 rotary driving, and promotion piston 40 moves along the direction that cavity limits.

Cam drive can pre-determine the relation of input power and ouput force, and controllability is good and can obtain comparatively stable braking moment; And the cam drive amount of parts is few, and is simple in structure and overall dimensions is less, is particularly useful for being installed in the narrow and small compact working environment.

As preferred version of the present invention, shown in Fig. 1～3, described cam drive comprises cam 50, cam 50 is fixed on the camshaft 51, the outer side surface of cam 50 leans on the end face away from movable brake slipper 20 of piston 40, camshaft 51 is rotatably assorted with caliper body 10 formations, and an end of camshaft 51 is fixedlyed connected with torque arm 60.

From the above, described cam drive simple structure only contains 51 two component of cam 50 and camshaft, so be easy to manufacturing and with low cost, safe and reliable, the low and long service life of rate of fault.

The multiple implementation that is combined with of described camshaft 51 and caliper body 10, as preferred version of the present invention, shown in Fig. 1,4, described camshaft 51 is stepped axle, camshaft 51 passes caliper body 10 and constitutes revolute pair with caliper body 10, the following end periphery that stretches out caliper body 10 of camshaft 51 is provided with circlip 52, and circlip 52 is fixed on the caliper body 10.

Cooperate and the end of circlip 52 is fixed by stair-stepping, camshaft 51 can rotate under the effect of torque arm 60 freely, rotate thereby drive cam 50, and then driven plunger 40 moves along the direction that the cavity of caliper body 10 limits.

As the further preferred version of the present invention, be provided with stroke control mechanism between described piston 40 and the cam 50.

Described stroke control mechanism has multiple implementation, comprises such as described stroke control mechanism and regulates double-screw bolt 70, and an end and the piston 40 of regulating double-screw bolt 70 constitute screw-thread fit, and the other end is resisted against on the outer side surface of cam 50.

As preferred version of the present invention, shown in Fig. 1～3,5, described stroke control mechanism comprises regulates double-screw bolt 70, an end and the piston 40 of regulating double-screw bolt 70 constitute screw-thread fit, the other end and sheath 80 constitute screw-thread fit, the Hand of spiral of the screw thread at the two end part of adjusting double-screw bolt 70 is different, the middle part of described adjusting double-screw bolt 70 is provided with stirs the commentaries on classics tooth 71 that double-screw bolt rotates, sheath 80 is resisted against on the outer side surface of cam 50 away from an end of regulating double-screw bolt 70, and described sheath 80 and caliper body 10 are for being slidingly matched.

As shown in Figure 4, described caliper body 10 is provided with stroke adjustment hole 11.

As shown in Figure 1,11 places, described stroke adjustment hole are provided with rubber blanking cover 12.

Specify embodiments of the present invention below in conjunction with Fig. 1～5:

1) Parking process

After vehicle stops, driver pulling Parking handle, by driving mechanisms such as Parking drag-lines power is delivered in the Parking torque arm 60, shown in arrow among Fig. 2 and the figure, drive cam shaft 51 is rotated in Parking torque arm 60, camshaft 51 drives cam 50 and rotates thereupon, cam 50 will drive sheath 80 to piston 40 1 side shiftings when rotating, sheath 80 promotes to regulate double-screw bolt 70 immediately to piston 40 1 side shiftings, regulate 70 of double-screw bolts and promote piston 40 to brake disc 90 1 side shiftings, piston 40 moves along the direction that the cavity in the caliper body 10 limits, and promotion activity brake slipper 20 is attached to the inboard working surface of brake disc 90; Meanwhile, when cam 50 drives sheath 80, sheath 80 is given 50 1 reaction forces of cam, this reaction force will make cam 50 oriented trend away from brake disc 90 1 lateral movements, because camshaft 51 and caliper body 10 are connected with revolute pair, so camshaft 51 passes to caliper body 10 with this reaction force, because caliper body 10 is connected with sliding pair with its circumferential component such as knuckle etc., so caliper body 10 is to away from brake disc 90 1 lateral movements, the motion of caliper body 10 will drive the outside working surface that fixing brake slipper 30 clings to brake disc 90, so far movable brake slipper 20 and fixedly brake slipper 30 abut in respectively on the inside and outside both sides working surface of brake disc 90.

Driver continues pulling Parking handle, then cam 50 be rotated further can make movable brake slipper 20 and fixedly the both sides working surface of 30 pairs of brake discs 90 of brake slipper produce positive pressure, under the effect of positive pressure, just brake disc 90 is produced along it and rotate tangential stiction, reaction movable brake slipper 20 and fixedly the tangential force on the brake slipper 30 then be delivered on the knuckle by caliper body 10, aforesaid tangential stiction just can stop wheel, thereby realizes parking function.

2) releasing process

Before the vehicle launch, driver loosens hand braking handle, shown in arrow among Fig. 3 and the figure, the pulling force that acts in the Parking torque arm 60 disappears, reset at drag-line return spring effect lower arm 60, cam 50 resets thereupon, resetting of cam 50 disappears the pressure that acts on the sheath 80, and then the reaction force that camshaft 51 acts on the caliper body 10 also disappears, therefore act on movable brake slipper 20 and fixedly the positive pressure on the brake slipper 30 disappear, the tangential stiction that acts on immediately on the brake disc 90 also disappears, and after the tangential force of prevention wheel disappeared, vehicle just can advance or retreat.Behind vehicle launch, raising along with brake disc 90 rotating speeds, movable brake slipper 20 and fixing brake slipper 30 effect that oriented both sides are cast aside, under the effect of this effect, movable brake slipper 20 promotes piston 40 to the lateral movement away from brake disc 90, piston 40 promotes to regulate double-screw bolt 70 then to cam 50 1 lateral movements, regulates 70 of double-screw bolts and promotes sheath 80 returning positions, and fixedly brake slipper 30 then drives caliper body 10 and moves with returning position to the opposite side away from brake disc 90.

3) stroke adjustment process

In the continuous using process of the present invention, movable brake slipper 20, fixedly brake slipper 30 and brake disc 90 all have wearing and tearing and cause its reduced thickness, thereby cause movable brake slipper 20, fixedly the gap between brake slipper 30 and the brake disc 90 is increasing, under this kind state during Parking piston 40 and the caliper body 10 bigger stroke that just needs to slide just can make movable brake slipper 20, fixedly brake slipper 30 abuts in respectively on the working surface of brake disc 90 both sides, and the stroke of piston 40 and caliper body 10 is subjected to the restriction of the maximum lift of cam 50, so when stopping caliper may wear to a certain degree, just need remedy the gap value of wearing and tearing by the spacing between adjusting sheath 80 and the piston 40.Shown in Fig. 1,4, take off the rubber blanking cover 12 that is sealed on the stroke adjustment hole 11, stir the commentaries on classics tooth of regulating on the double-screw bolt 70 71 by screw-driver or other instruments, because the Hand of spiral of the screw thread at the two end part of adjusting double-screw bolt 70 is different, so stir the spacing that can increase or reduce when regulating double-screw bolt 70 between piston 40 and the sheath 80, thereby realized the adjusting in stroke and gap.

Have following advantage with respect to prior art among the present invention: one, utilize cam type surface can Control property can obtain comparatively desirable Input Forces and the relation of power output, and controllability is good and can obtain Comparatively stable braking moment; Two, cam transmission mechanism of the present invention and stopping caliper caliper, Brake block and driving propulsive mechanism are separate, have increased safety coefficient; Three, the present invention can With the realization modularized design, and can realize and the disk brakes combinations such as fixing pincers or floating clamp, and Combination collocation is convenient; Four, the present invention is simple in structure, and parts are few, and is with low cost, reliability Height and long service life.

Claims

1, a kind of stopping caliper, comprise the movable brake slipper (20) that is arranged on the caliper body (10) and fixing brake slipper (30), one end of movable brake slipper (20) is fixed on the piston (40), piston (40) is arranged in the cavity of caliper body (10) and can moves along the direction that cavity limits, it is characterized in that: the end away from movable brake slipper (20) of piston (40) is provided with cam drive, cam drive is fixed on the caliper body (10), cam drive is by torque arm (60) rotary driving, and promotion piston (40) moves along the direction that cavity limits.

2, stopping caliper according to claim 1, it is characterized in that: described cam drive comprises cam (50), cam (50) is fixed on the camshaft (51), the outer side surface of cam (50) leans on the end face away from movable brake slipper (20) of piston (40), camshaft (51) is rotatably assorted with caliper body (10) formation, and an end of camshaft (51) is fixedlyed connected with torque arm (60).

3, stopping caliper according to claim 2 is characterized in that: be provided with stroke control mechanism between described piston (40) and the cam (50).

4, stopping caliper according to claim 2, it is characterized in that: described camshaft (51) is stepped axle, camshaft (51) passes caliper body (10) and constitutes revolute pair with caliper body (10), the following end periphery that stretches out caliper body (10) of camshaft (51) is provided with circlip (52), and circlip (52) is fixed on the caliper body (10).

5, stopping caliper according to claim 3 is characterized in that: described stroke control mechanism comprises regulates double-screw bolt (70), and an end and the piston (40) of regulating double-screw bolt (70) constitute screw-thread fit, and the other end is resisted against on the outer side surface of cam (50).

6, stopping caliper according to claim 3, it is characterized in that: described stroke control mechanism comprises regulates double-screw bolt (70), an end and the piston (40) of regulating double-screw bolt (70) constitute screw-thread fit, the other end and sheath (80) constitute screw-thread fit, the Hand of spiral of the screw thread at the two end part of adjusting double-screw bolt (70) is different, the middle part of described adjusting double-screw bolt (70) is provided with stirs the commentaries on classics tooth (71) that double-screw bolt rotates, sheath (80) is resisted against on the outer side surface of cam (50) away from an end of regulating double-screw bolt (70), and described sheath (80) and caliper body (10) are for being slidingly matched.

7, stopping caliper according to claim 6 is characterized in that: described caliper body (10) is provided with stroke adjustment hole (11).

8, engine camshaft bearing cap according to claim 7 is characterized in that: rubber blanking cover (12) is located to be provided with in described stroke adjustment hole (11).