CN201502653U

CN201502653U - Automatic compensation device of brake

Info

Publication number: CN201502653U
Application number: CN2009201862382U
Authority: CN
Inventors: 赵焱; 李成浣
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-07-06
Filing date: 2009-07-06
Publication date: 2010-06-09
Anticipated expiration: 2019-07-06

Abstract

The utility model provides an automatic compensation device of a brake, which belongs to the field of mechanic technology and solves the technical problems of high processing difficulty, easy scrapping, easy abrasion of threads, poor strength, short service life and the like caused by the direct fixing of the caliper housing and the jackscrew sleeve of the exiting compensation device. The automatic compensation device comprises a compensation piece arranged in a shell; and the compensation piece is provided with a spring capable of driving the compensation piece to rotate relative to the shell. The automatic compensation device is characterized in that a stud is arranged between the compensation piece and the shell; the stud and the compensation piece are connected by threads; and the stud is fixed in the shell circumferentially. As the stud of the automatic compensation device is independently machined, the processing difficulty is lowered, the scrapping rate of the shell is reduced, and the cost is saved; and the stud machined independently can adopt the same iron material as the compensation piece, thereby reducing the abradability of threads, increasing the strength and prolonging the service life.

Description

The automatic compensator of break

Technical field

The utility model relates to a kind of automatic compensator of break, is mainly used in compensate for wear in the vehicle braked device, belongs to field of mechanical technique.

Background technique

Break is one of critical piece of vehicle, can be divided into frictin braek and non-friction type break, and frictin braek relies on the frictional force between brake component (friction plate) and the movement parts (as brake disc) to brake; Non-friction type break such as magnetic powder brake (shearing that utilizes the magnetic magnetization to be produced is braked), magnetic eddy-current brake (regulating the size of braking moment) and water whirlpool brake etc. by regulating field current.Because the frictin braek price is low, therefore use comparatively extensive.But frictin braek is through after repeatedly braking, friction plate can wear and tear, cause the gap between brake disc and the friction plate to increase, thereby influence braking effect, " a kind of electric bicycle brake calipers " that provided as Chinese patent ZL 200720123677.X also is a kind of frictin braek, it have can compensate for wear mechanism, this mechanism is by the jackscrew cover, bearing pin and the torsion spring that is engaged on the bearing pin are formed; rocking arm drives torsion spring; the head of bearing pin contacts with the bottom surface of rocking arm; during normal brake application, and the rocking arm that links to each other with braking string drives torsion spring, and the internal diameter of torsion spring is increased; thus torsion spring is freely rotated bearing pin outside; and promptly this compensation mechanism is inoperative at this moment, and the steel ball on the while rocking arm moves at the more shallow place of pit on the piston, makes friction plate clamping brake disc; When the releasing of brake line, rocking arm relies on the spring reset that is installed between rocking arm and the braking string; When resetting behind the friction disc wear, because the gap between friction plate and the brake disc increases, make the pendulum angle of rocking arm surpass design run-out tolerance angle; rocking arm drives torsion spring and rotates when resetting; torsion spring is held bearing pin tightly because of internal diameter diminishes; the jackscrew cover is screwed out compensate the gap that is produced, and is reliable to guarantee braking.

In above-mentioned compensation mechanism, jackscrew cover directly is fixed in the pincers shell, therefore needs process in this pincers shell to be used for the interior threaded hole that matches with the jackscrew cover, but this interior threaded hole is difficult for processing, easily cause the pincers shell to scrap, thereby increase cost, in addition, in order to reduce cost, the general relatively poor aluminium material of intensity that adopts is made the pincers shell, and the jackscrew cover is made by the higher iron material of intensity, after both cooperate, the internal thread of aluminum pincers shell is easy to wear, and working life is short.

Summary of the invention

The utility model provides a kind of automatic compensator of break, and this compensation device not only is easy to processing, reduces scrappage, and can also gain in strength, and reduces wearing and tearing.

The purpose of this utility model can realize by following technical proposal: the automatic compensator of break, comprise the compensating part that is located in the housing, this compensating part is provided with the spring that can drive its relative housing rotation, it is characterized in that, be provided with double-screw bolt between described compensating part and the housing, by being threaded, and double-screw bolt circumferentially is fixed in the housing between double-screw bolt and the compensating part.

The automatic compensator of this break, by compensating part, spring and double-screw bolt are formed, compensating part with after double-screw bolt is threaded again integral body be embedded in the housing, and double-screw bolt circumferentially is fixed in the housing, be that double-screw bolt can not rotate relative to housing, the external force that imposes on spring comes from rocking arm; rocking arm magnifies spring inside diameter when a directive effect and breaks away from compensating part; spring idle running; rocking arm diminishes spring inside diameter during toward another directive effect and holds compensating part tightly, and drives compensating part towards the direction rotation that breaks away from double-screw bolt, promptly screws out double-screw bolt; thus increase both axial length overalls, in order to the wearing and tearing of friction compensation sheet.

In the automatic compensator of above-mentioned break, described compensating part is cylindric and has outside thread, and described double-screw bolt is a nut.

In the automatic compensator of above-mentioned break, the circumferential side wall of described double-screw bolt is shaped as non-circular, and housing is provided with the fixed hole that the circumferential side wall shape with double-screw bolt is complementary.Be that double-screw bolt is complementary with the fitting surface shape that is connected of housing, thereby prevent that double-screw bolt from rotating, the circumferential side wall shape of double-screw bolt can adopt non-full circle shape, waist shape, polygonal or the ellipse etc. with a plane.

In the automatic compensator of above-mentioned break, be installed with bearing pin on the described compensating part, above-mentioned spring housing is connected on the bearing pin.Spring housing is connected on the bearing pin, be convenient to install, and when not braking, spring is embraced at the bearing pin outer surface.

In the automatic compensator of above-mentioned break, described compensating part center is provided with the installation cavity greater than the spring external diameter, and above-mentioned bearing pin is positioned at installation cavity, and the active role end that is used to transmit external force on the spring is positioned at outside the end of compensating part.Bearing pin is positioned at mounting hole, makes volume little, compact structure; Installation cavity can prevent that greater than the spring external diameter spring is subjected to the influence of installation cavity when rotating; The active role end of spring is positioned at outside the end of compensating part, makes rocking arm be convenient to connect the active role end of spring.

In the automatic compensator of above-mentioned break, the end face of the active role end of close spring is protruding in the corresponding end face of compensating part on the described bearing pin.Help active role end with spring and be arranged on rotating center place, make rocking arm can transmit bigger active force to spring away from rocking arm, thus timely compensate for clearance.

In the automatic compensator of above-mentioned break, described compensating part center is provided with the attachment hole that communicates with installation cavity, and the end near the installation cavity bottom surface on the above-mentioned bearing pin is provided with the connection neck, connects neck and attachment hole drive fit.During installation, as long as the connection neck of bearing pin is squeezed in the attachment hole.

In the automatic compensator of above-mentioned break, the installation cavity underrun of described bearing pin and compensating part is welded to connect.

In the automatic compensator of above-mentioned break, described bearing pin and compensating part are made one.Simple in structure, need not assembling.

As second kind of situation, in the automatic compensator of above-mentioned break, described compensating part is cylindric and has internal thread, described double-screw bolt is a bolt, the head of bolt circumferentially is fixed in the housing, the threaded joints of bolt is threaded with compensating part, and above-mentioned spring housing is connected on the outer wall of compensating part.

The automatic compensator of this break is provided with the double-screw bolt that is threaded with it outside compensating part, because double-screw bolt independently processes, make one with original technology employing with housing and compare, and has reduced difficulty of processing, reduces the scrappage of housing, saves cost; And the double-screw bolt that independently processes can adopt the iron material identical with compensating part, can reduce the wear intensity of screw thread, improves the intensity of compensation device, thereby prolongs the working life of compensation device.

Description of drawings

Fig. 1 is the structural representation of the automatic compensator of this break;

Fig. 2 is the A-A cross-sectional schematic of Fig. 1;

Fig. 3 is the cross-sectional schematic of another kind of automatic compensator;

Fig. 4 is the structural representation with break of this automatic compensator;

Fig. 5 is the B-B cross-sectional schematic of Fig. 4.

Among the figure, 1 compensating part; The 1a installation cavity; The 1b attachment hole; 2 springs; 2a active role end; 3 double-screw bolts; 4 bearing pins; 4a connects neck; The 4b locating slot; 5 housings; 6 rocking arms; 6b moves the circular arc pit; The 6c draw-in groove; 7 pistons; The quiet circular arc pit of 7a; 8 friction plates; 9 steel balls.

Embodiment

Below be specific embodiment of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.

As shown in Figure 1 and Figure 2, the automatic compensator of this break, comprise that a side is the housing 5 of opening, be provided with in the housing 5 and be cylindric and have externally threaded compensating part 1, this compensating part 1 is provided with the spring 2 that can drive its relative housing 5 rotations, is socketed with double-screw bolt 3 between compensating part 1 and the housing 5, and this double-screw bolt 3 is a nut, by being threaded, and double-screw bolt 3 circumferentially is fixed in the housing 5 between double-screw bolt 3 and the compensating part 1.

The scheme that double-screw bolt 3 circumferentially is fixed in the housing 5 is more, can adopt the position structure of self, such as making the circumferential side wall shape of double-screw bolt 3 non-circular, and the fixed hole that the circumferential side wall shape with double-screw bolt 3 is complementary is set on housing 5, as shown in Figure 2, the circumferential side wall of double-screw bolt 3 is shaped as the non-full circle shape with a plane, and this plane is used for the location, certainly also can be made into other shape, as waist shape, Hexagon, Octagon, ellipse etc.; Also can connect in addition by parts such as pin, screws.

As shown in Figure 2, spring 2 drives compensating part 1 by bearing pin 4, be provided with installation cavity 1a greater than the spring external diameter at the center of compensating part 1, the bottom of installation cavity 1a is provided with the attachment hole 1b that communicates with it, one end of bearing pin 4 is provided with the friction tight neck 4a that is connected with attachment hole 1b, be used to transmit the corresponding end face of the equal projection compensation spare 1 of active role end 2a of external force on the other end of bearing pin 4 and the spring 2, the rocking arm 6 that drives spring 2 rotations can directly contact with the exterior edge face of bearing pin 4, also can annular convex shoulder be set in the bottom of rocking arm 6, the bottom surface by annular convex shoulder contacts with the end face of compensating part 1.In actual use, squeeze among the attachment hole 1b of compensating part, locating slot 4b can be set at the head of bearing pin 4 for the ease of connection neck 4a with bearing pin, thus with force localization in locating slot 4b.

Bearing pin 4 can also be by being welded to connect, such as bearing pin 4 is welded mutually with the installation cavity 1a bottom surface of compensating part with outside compensating part 1 is connected by drive fit; Also bearing pin 4 and compensating part 1 can be made one, bearing pin 4 can be directly extends out (being that bearing pin 4 does not have installation cavity) from an end face of compensating part 1, and perhaps bearing pin 4 extends out from the installation cavity 1a of compensating part 1.

Fig. 4 and Figure 5 shows that the use condition of this automatic compensator in a kind of bi-directional brake, this bi-directional brake comprises a left side, two fastening devices of right symmetry, brake disc is between two fastening devices, each fastening device all is provided with automatic compensator, and fastening device is located between the opening of automatic compensator and housing 5, each fastening device comprises rocking arm 6, piston 7 and friction plate 8; end of rocking arm 6 is driven by braking string; the other end of rocking arm 6 is a round turntable; end face center of rotating disk contacts with the bearing pin 4 in the automatic compensator; rotating disk is provided with draw-in groove 6c; the active role end 2a of automatic compensator medi-spring is stuck in the draw-in groove 6c; piston 7 contacts with rotating disk by plurality of steel balls 9; and steel ball 9 respectively with piston 7 on quiet circular arc pit 7a and the moving circular arc pit 6b on the rotating disk match; the both sides of piston 7 also are provided with resetting means, and the outside of piston 7 is connected mutually with friction plate 8, and friction plate 8 directly acts on the brake disc during braking.

During normal brake application, braking string pulling rocking arm 6, rotating disk drives spring 2, and the internal diameter of spring 2 is increased, and spring 2 freely rotates outside bearing pin 4, and this moment, this automatic compensator was inoperative, simultaneously under the drive of rotating disk, steel ball 9 moves at the more shallow place of quiet circular arc pit 7a on the piston 7, outside jack-up piston 7, and piston 7 drives friction plates 8 until clamping brake disc; When the releasing of brake line, rely on the resetting means that is located at piston 7 both sides that piston 7 and friction plate 8 are resetted.

When braking behind the friction disc wear, its braking process is identical during with normal brake application, when resetting, because friction plate 8 has wearing and tearing, cause the thickness attenuation of friction plate 8, therefore gapped between it and the brake disc, make the pendulum angle of rocking arm 6 surpass design run-out tolerance angle; rocking arm 6 drives spring 2 reverse rotation when resetting; spring 2 is held bearing pin 4 tightly because of internal diameter diminishes, and bearing pin 4 drives compensating part 1 and screws out double-screw bolt 3, and the axial length overall between compensating part 1 and the double-screw bolt 3 is increased; thus the gap that compensation is produced is reliable to guarantee braking.

Figure 3 shows that the automatic compensator of another kind of structure, the difference of it and such scheme is: compensating part 1 is cylindric and has internal thread, the double-screw bolt 3 that matches with it is hex head bolt, the hexagon head of hex head bolt matches with hex slot in being located at housing 5, thereby prevent that bolt from rotating, the threaded joints of bolt is threaded with compensating part 1, and spring 2 directly is socketed on the outer wall of compensating part 1, during use, end face near spring active role end 2a on the compensating part 1 contacts with the rotating disk of rocking arm 6, and the active role end 2a of spring 2 still is connected with rotating disk.Certainly, when reality was made, the head of bolt also can adopt other shape, as square or cut out the circle on a plane or the like.

Claims

1. the automatic compensator of break, comprise the compensating part (1) that is located in the housing (5), this compensating part (1) is provided with the spring (2) that can drive its relative housing (5) rotation, it is characterized in that, be provided with double-screw bolt (3) between described compensating part (1) and the housing (5), by being threaded, and double-screw bolt (3) circumferentially is fixed in the housing (5) between double-screw bolt (3) and the compensating part (1).

2. the automatic compensator of break according to claim 1 is characterized in that, described compensating part (1) is cylindric and has outside thread, and described double-screw bolt (3) is a nut.

3. the automatic compensator of break according to claim 2 is characterized in that, the circumferential side wall of described double-screw bolt (3) is shaped as non-circular, and housing (5) is provided with the fixed hole that the circumferential side wall shape with double-screw bolt (3) is complementary.

4. the automatic compensator of break according to claim 2 is characterized in that, is installed with bearing pin (4) on the described compensating part (1), and above-mentioned spring (2) is socketed on the bearing pin (4).

5. the automatic compensator of break according to claim 4, it is characterized in that, described compensating part (1) center is provided with the installation cavity (1a) greater than spring (2) external diameter, above-mentioned bearing pin (4) is positioned at installation cavity (1a), and the active role end (2a) that is used to transmit external force on the spring (2) is positioned at outside the end of compensating part (1).

6. the automatic compensator of break according to claim 5 is characterized in that, described bearing pin (4) is gone up near the end face of the active role end (2a) of spring protruding in the corresponding end face of compensating part (1).

7. according to the automatic compensator of claim 5 or 6 described breaks, it is characterized in that, described compensating part (1) center is provided with the attachment hole (1b) that communicates with installation cavity (1a), the end that above-mentioned bearing pin (4) is gone up near installation cavity (1a) bottom surface is provided with connection neck (4a), connects neck (4a) and attachment hole (1b) drive fit.

8. according to the automatic compensator of claim 5 or 6 described breaks, it is characterized in that described bearing pin (4) is welded to connect with installation cavity (1a) underrun of compensating part.

9. the automatic compensator of break according to claim 4 is characterized in that, described bearing pin (4) is made one with compensating part (1).

10. the automatic compensator of break according to claim 1, it is characterized in that, described compensating part (1) is cylindric and has internal thread, described double-screw bolt (3) is a bolt, the head of bolt circumferentially is fixed in the housing (5), the threaded joints of bolt is threaded with compensating part (1), and above-mentioned spring (2) is socketed on the outer wall of compensating part (1).