CN209925480U - Brake assembly with corner type brake shoe friction plate abrasion alarm device - Google Patents

Abstract

The utility model provides a stopper assembly with corner formula brake shoe friction disc wearing and tearing alarm device, including spare parts such as braking bottom plate, camshaft, initiative brake shoe area friction disc assembly, driven brake shoe area friction disc assembly, cam bracket, spring brake jar, automatic adjustment arm, brake friction disc wearing and tearing alarm sensor. The utility model discloses a core detects the adjustment corner difference between automatic adjustment arm and the camshaft through brake friction piece wearing and tearing alarm sensor and judges whether the brake shoe friction piece reaches the wearing and tearing limit to turn into the signal of telecommunication with corner displacement signal, turn into signals such as sound, light with the signal of telecommunication again and report to the police to the driver in the driver's cabin. The utility model discloses need not change the stopper assembly body, only need carry out corresponding change to the camshaft, just can realize monitoring brake shoe friction disc wearing and tearing limit to brake friction disc wearing and tearing alarm sensor can repeat repetitious usage, long service life.

Description

Brake assembly with corner type brake shoe friction plate abrasion alarm device

Technical Field

The utility model belongs to the automobile manufacturing field, specific stopper assembly with corner formula brake shoe friction disc wearing and tearing alarm device that says so.

Background

The commercial vehicle brake is divided into a drum brake and a disc brake, and the drum brake is the best choice for most domestic medium and heavy commercial vehicle manufacturers due to low price and stable braking performance. In a drum brake, a brake torque is generated by friction between a brake shoe friction plate and a brake drum, so that a vehicle stops. At present, the method for judging the abrasion condition of the brake shoe friction plate in China is to observe the abrasion condition of the brake shoe friction plate through an observation hole arranged on a dust blocking plate, and in the use process of a vehicle, a driver is often required to visually check the residual thickness of the brake shoe friction plate through the observation hole of the dust blocking plate to judge whether the brake shoe friction plate needs to be replaced, because whether the friction plate reaches the abrasion limit cannot be quickly and accurately determined, the brake shoe friction plate is excessively abraded in the use process of the vehicle, the contact friction between a rivet and a brake drum is caused, and the loss of the braking capacity causes traffic accidents; the problem of material waste of the friction plate caused by replacement of the brake shoe friction plate in advance without reaching the wear limit can also occur. Therefore, the national standard of the people's republic of China, GB 7258-2017, No. 7.9.5, specifically requires passenger cars and trucks with automatic brake clearance adjusting devices and special operating vehicles with total mass more than 3500kg, when the service brake lining needs to be replaced, an optical or acoustic alarm device is adopted to give an alarm to a driver on a driver seat, and in item 15.2 it is explicitly required that "7.9.5 relates to a need to be alerted when a service brake lining needs to be replaced, for the automobile adopting the drum brake, the new production vehicle is implemented only at the 25 th month from the date of the standard implementation, namely 1 month and 1 day in 2020, all passenger cars and trucks provided with automatic brake clearance adjusting devices and special work vehicles with the total mass more than 3500kg, when the service brake lining needs to be replaced, a brake shoe friction plate abrasion alarming device needs to be additionally arranged.

Disclosure of Invention

The utility model provides a simple structure's stopper assembly that has corner formula stopper friction disc wearing and tearing alarm device has solved drum brake shoe friction disc and has leaded to the traffic accident or because of changing the extravagant problem of material in advance because of excessive wearing and tearing.

The technical scheme of the utility model is explained as follows with the attached drawings:

a brake assembly with a corner type brake shoe friction plate abrasion alarm device comprises a brake bottom plate 1, a camshaft 2, a camshaft washer 3, a brake shoe pin shaft 4, a return spring 5, a tension spring 6, a driving brake shoe belt friction plate assembly 7, a driven brake shoe belt friction plate assembly 8, a front dust-blocking plate 9, a rear dust-blocking plate 10, a dust-blocking plate connecting bolt 11, a cam bracket 12, a cam bracket connecting bolt 13, a spring brake cylinder 14, a spring washer 15, a nut 16, an automatic adjusting arm 17, an adjusting gasket 18, an automatic adjusting arm bracket 19, an automatic adjusting arm bracket connecting bolt 20, an automatic adjusting arm bracket fixing bolt 21, a brake shoe abrasion alarm sensor 22, a brake shoe abrasion alarm sensor fixing baffle plate 23, a clamp spring 24, a brake shoe abrasion alarm sensor positioning pin 25, a brake cylinder fixing pin 26, a brake cylinder fixing pin 23, a brake shoe abrasion alarm sensor fixing pin 23, a clamp spring 24, a, Flat spacers 27, cotter pins 28;

the camshaft 2 is arranged above the brake bottom plate 1; the camshaft gasket 3 is arranged between the camshaft 2 and the brake bottom plate 1; the brake shoe pin shaft 4 is arranged in a brake shoe pin shaft mounting hole 1-7 arranged at the lower end of the brake bottom plate 1; the brake shoe pin shaft 4 is in interference fit with the brake shoe pin shaft mounting holes 1-7; the active brake shoe belt friction plate assembly 7 is arranged on the left side and the front side of the brake bottom plate 1; the driven brake shoe with friction plate assembly 8 is arranged on the left side and the rear side of the brake bottom plate 1; the driving brake shoe belt friction plate assembly 7 and the driven brake shoe belt friction plate assembly 8 are respectively matched with the cam shaft 2 and the brake shoe pin shaft 4 through a return spring 5 and a tension spring 6 and are fixed on the front side and the rear side of the left side of the brake bottom plate 1; the return spring 5 is hung between return spring hanging pins 7-5 arranged on a driving brake shoe belt friction plate assembly 7 and a driven brake shoe belt friction plate assembly 8; the tension spring 6 is hung on tension spring hanging holes 7-12 arranged on a driving brake shoe belt friction plate assembly 7 and a driven brake shoe belt friction plate assembly 8; the front dust-proof disc 9 is arranged on the right side and the front side of the brake bottom plate 1; the rear dust-blocking plate 10 is arranged on the right side and the rear side of the brake bottom plate 1; the front dust-blocking plate 9 and the rear dust-blocking plate 10 are both fixed on the brake bottom plate 1 through dust-blocking plate connecting bolts 11; the cam bracket 12 is arranged above the right side of the brake bottom plate 1; the cam bracket 12 is fixedly connected with the brake bottom plate 1 through a cam bracket connecting bolt 13; the spring brake cylinder 14 is arranged on the cam bracket 12; the spring brake cylinder 14 is fixedly connected with the cam bracket 12 through a spring washer 15 and a nut 16; the automatic adjusting arm 17 is arranged at the right end of the cam bracket 12 and is connected with an automatic adjusting arm matched external spline 2-2 arranged on the cam shaft 2 through a cam shaft matched internal spline 17-1; the automatic adjusting arm 17 is connected with the spring brake cylinder 14 through a spring brake cylinder fixing pin 26, a flat gasket 27 and a split pin 28; an adjusting gasket 18 and an automatic adjusting arm bracket 19 are arranged between the automatic adjusting arm 17 and the cam bracket 12; the automatic adjusting arm bracket 19 fixes the automatic adjusting mechanism 17-3 of the automatic adjusting arm 17 and the automatic adjusting arm bracket connecting arm 12-6 arranged on the cam bracket 12 through an automatic adjusting arm bracket connecting bolt 20 and an automatic adjusting arm bracket fixing bolt 21 respectively; the brake friction plate abrasion alarm sensor 22 is arranged at the right end of the automatic adjusting arm 17; the brake friction plate abrasion alarm sensor 22 is fixed with the automatic adjusting arm 17 through a positioning pin 25; the brake friction plate abrasion alarm sensor 22 is matched and connected with a brake shoe friction plate abrasion alarm sensor fixing key groove 2-4 arranged at the top end of the shaft diameter position at the right end of the camshaft 2 through a matching key 22-1 arranged in the middle of the brake friction plate abrasion alarm sensor; a brake friction plate abrasion alarm sensor fixing baffle 23 is arranged at the right end of the brake friction plate abrasion alarm sensor 22; a snap spring 24 is arranged on the right side of the fixed baffle 23 of the brake friction plate abrasion alarm sensor.

The upper end of the brake bottom plate 1 is provided with a cam bracket mounting hole 1-1; four cam bracket connecting bolt inner threaded holes 1-2 are arranged around the cam bracket mounting hole 1-1; the middle part of the brake bottom plate 1 is provided with brake flange matching holes 1-3; brake bottom plate connecting bolt holes 1-4 are arranged around the brake flange matching holes 1-3; two ABS wire harness through holes 1-5 are arranged on the horizontal plane of the brake bottom plate 1 and outside the brake flange matching holes 1-3; dust blocking disc connecting bolt holes 1-6 are arranged in the middle of the brake bottom plate 1 and around the brake bottom plate connecting bolt holes 1-4 along the outer side of the diameter direction; the lower end of the brake bottom plate 1 is provided with two brake shoe pin shaft mounting holes 1-7.

The left end of the camshaft 2 is provided with a rolling cam 2-1, and the shape of the rolling cam 2-1 is a mirror pair 'S' shape; the right side of the camshaft 2 is provided with an automatic adjusting arm matched with an external spline 2-2; a clamp spring groove 2-3 is arranged at the right end shaft diameter of the camshaft 2; and a brake shoe friction plate abrasion alarm sensor fixing key groove 2-4 is arranged at the top end of the right end shaft diameter part of the camshaft 2.

The driving brake shoe belt friction plate assembly 7 and the driven brake shoe belt friction plate assembly 8 respectively comprise a brake shoe assembly 7-1, a No. I friction plate 7-2, a No. II friction plate 7-3, a rivet 7-4, a return spring hanging pin 7-5, a roller shaft 7-6 and a torsion spring 7-7; the brake shoe assembly 7-1 consists of a brake shoe panel 7-8 and two brake shoe studs 7-9 arranged on two sides of a vertical plane of the brake shoe panel 7-8; the brake shoe panel 7-8 and the brake shoe stud 7-9 are formed by stamping and welding; the No. I friction plate 7-2 is arranged on the lower rear part of the brake shoe assembly 7-1; the No. II friction plate 7-3 is arranged on the upper part of the rear part of the brake shoe assembly 7-1; the No. I friction plate 7-2 and the No. II friction plate 7-3 are fixedly connected with a brake shoe assembly 7-1 through rivets 7-4; the return spring hanging pin 7-5 is arranged in a return spring hanging pin mounting hole 7-10 arranged at the upper part of the brake shoe stud 7-9; the roller shaft 7-6 is arranged in a roller shaft mounting hole 7-11 arranged at the upper part of the brake shoe stud 7-9 through a torsion spring 7-7; and tension spring hanging holes 7-12 are formed in the middle lower parts of the brake shoe vertical ribs 7-9.

The cam bracket 12 is provided with a camshaft mounting hole 12-1 along the inner side of the diameter direction; a cam bracket connecting plate 12-2 is arranged on the left side of the middle part of the cam bracket 12; four cam bracket connecting bolt holes 12-3 are arranged around the cam bracket connecting plate 12-2; an air chamber bracket 12-4 is arranged on the right side of the middle part of the cam bracket 12, and two spring brake cylinder connecting bolt mounting holes 12-5 are arranged on the upper part of the air chamber bracket 12-4; the upper part of the right end of the cam bracket 12 is provided with an automatic adjusting arm bracket connecting arm 12-6; two automatic adjusting arm bracket connecting bolt holes 12-7 are arranged on the automatic adjusting arm bracket connecting arm 12-6.

The middle part of the automatic adjusting arm 17 is provided with an internal spline 17-1 matched with the camshaft; the upper end of the middle part of the automatic adjusting arm 17 is provided with a brake friction plate abrasion alarm sensor positioning pin mounting hole 17-2; an automatic adjusting arm automatic adjusting mechanism 17-3 is arranged at the outer side of the middle part of the automatic adjusting arm 17 along the diameter direction; the upper end of the automatic adjusting arm 17 is provided with a spring brake cylinder connecting fork matching hole 17-4.

The camshaft 2, the camshaft washer 3, the cam bracket 12, the automatic adjusting arm 17, the adjusting shim 18, the brake friction plate abrasion alarm sensor 22, the brake friction plate abrasion alarm sensor fixing baffle plate 23 and the clamp spring 24 are arranged on the same axis.

The utility model has the advantages that:

1. the cost performance is high: the utility model can monitor the abrasion limit of the brake shoe friction plate without changing the brake assembly body and only by correspondingly changing the camshaft, and the abrasion alarm sensor of the brake friction plate can be repeatedly used, thereby having long service life and ultrahigh cost performance;

2. the reliability is strong: brake shoe friction disc wearing and tearing alarm sensor arrange the friction work area of brake shoe friction disc and brake drum in outward, keep away from the high temperature source, can stabilize accurate detection brake shoe friction disc and whether reach the limit of wearing and tearing.

3. The safety is high: the utility model discloses whether can be quick, accurate definite brake shoe friction disc reaches the limit of wearing and tearing to avoid leading to rivet and brake drum contact friction because of the excessive wearing and tearing of brake shoe friction disc, the traffic accident that the loss brake ability causes, or change in advance because of the brake shoe friction disc does not reach the limit of wearing and tearing, cause the extravagant problem of friction disc material.

Drawings

Fig. 1 is a schematic diagram of an explosion structure of a brake assembly with a corner brake shoe friction plate wear alarm device according to the present invention;

fig. 2 is a side sectional view of the brake shoe according to the present invention;

fig. 3 is a front view of the brake shoe of the present invention;

FIG. 4 is a front view of the camshaft of the present invention;

fig. 5 is a left side view of the camshaft according to the present invention;

FIG. 6 is a schematic view of a portion of the camshaft of the present invention;

fig. 7 is a schematic view of an explosion structure of the brake shoe iron belt friction plate assembly of the present invention;

fig. 8 is a schematic structural view of a cam bracket according to the present invention;

fig. 9 is a front view of the automatic adjusting arm of the present invention;

fig. 10 is a front view of a brake shoe friction plate wear alarm sensor in the present invention;

fig. 11 is a partial schematic view of a brake assembly with a corner brake shoe friction plate wear alarm device according to the present invention;

fig. 12 is an assembly view of a brake assembly with a corner brake shoe friction plate wear alarm device according to the present invention;

FIG. 13 is a cross-sectional view taken at A-A of FIG. 12;

FIG. 14 is a cross-sectional view taken at B-B of FIG. 12;

FIG. 15 is a cross-sectional view taken at C-C of FIG. 12;

in the figure, 1, a brake shoe; 1-1, a cam bracket mounting hole; 1-2, connecting a bolt internal threaded hole with a cam bracket; 1-3, brake flange matching holes; 1-4, connecting the brake bottom plate with a bolt hole; 1-5, passing the ABS wiring harness through a hole; 1-6, connecting the dust blocking disc with a bolt hole; 1-7, a brake shoe pin shaft mounting hole; 2. a camshaft; 2-1, rolling a cam; 2-2, matching the automatic adjusting arm with an external spline; 2-3, a clamp spring groove; 2-4, fixing a key groove by a brake shoe friction plate abrasion alarm sensor; 3. a camshaft washer; 4. a brake shoe pin; 5. a return spring; 6. tensioning the spring; 7. the active brake shoe is provided with a friction plate assembly; 7-1, a brake shoe assembly; no. 7-2, No. I friction plate; no. 7-3, No. II friction plate; 7-4, riveting; 7-5, hanging a pin by a return spring; 7-6, roller shaft; 7-7, a torsion spring; 7-8, brake shoe panel; 7-9, brake shoe studs; 7-10 parts of a return spring hanging pin mounting hole; 7-11, roller shaft mounting holes; 7-12, tensioning the spring hanging hole; 8. the driven brake shoe iron belt friction plate assembly; 9. a front dust-blocking plate; 10. a rear dust-blocking plate; 11. a dust blocking plate connecting bolt; 12. a cam bracket; 12-1, camshaft mounting holes; 12-2, cam bracket connecting plates; 12-3, connecting the cam bracket with a bolt hole; 12-4, an air chamber bracket; 12-5, mounting holes for bolts of spring brake cylinders; 12-6, automatically adjusting the arm bracket connecting arm; 12-7, connecting bolt holes of the automatic adjusting arm bracket; 13. the cam bracket is connected with a bolt; 14. a spring brake cylinder; 15. a spring washer; 16. a nut; 17. an automatic adjustment arm; 17-1, the camshaft is matched with the internal spline; 17-2, mounting holes for positioning pins of the brake friction plate abrasion alarm sensors; 17-3, an automatic adjusting mechanism of an automatic adjusting arm; 17-4, fitting holes of a spring brake cylinder connecting fork; 18. adjusting the gasket; 19. an automatic adjustment arm support; 20. the automatic adjusting arm bracket is connected with a bolt; 21. An automatic adjustment arm bracket fixing bolt; 22. a brake friction plate abrasion alarm sensor; 23. a brake friction plate abrasion alarm sensor fixes a baffle plate; 24. a clamp spring; 25. a brake friction plate abrasion alarm sensor fixes a pin shaft; 26. a spring brake cylinder fixing pin; 27. a flat gasket; 28. and a cotter pin.

Detailed Description

Referring to fig. 1, a brake assembly with a corner type brake shoe friction plate wear alarm device includes a brake bottom plate 1, a camshaft 2, a camshaft washer 3, a brake shoe pin 4, a return spring 5, a tension spring 6, a driving brake shoe friction plate assembly 7, a driven brake shoe friction plate assembly 8, a front dust-blocking plate 9, a rear dust-blocking plate 10, a dust-blocking plate connecting bolt 11, a cam bracket 12, a cam bracket connecting bolt 13, a spring brake cylinder 14, a spring washer 15, a nut 16, an automatic adjusting arm 17, an adjusting shim 18, an automatic adjusting arm bracket 19, an automatic adjusting arm bracket connecting bolt 20, an automatic adjusting arm bracket fixing bolt 21, a brake shoe wear alarm sensor 22, a brake shoe wear alarm sensor fixing plate 23, a snap spring 24, a brake shoe wear alarm sensor positioning pin 25, a spring brake shoe wear alarm sensor fixing pin 26, a brake cylinder fixing pin 26, an automatic adjusting arm bracket connecting bolt 20, an automatic, Flat spacers 27, cotter pins 28;

referring to fig. 2 and 3, the upper end of the brake bottom plate 1 is provided with a cam bracket mounting hole 1-1, and four cam bracket connecting bolt internal thread holes 1-2 are arranged around the cam bracket mounting hole 1-1; the middle part of the brake bottom plate 1 is provided with brake flange matching holes 1-3, and brake bottom plate connecting bolt holes 1-4 are arranged around the brake flange matching holes 1-3; two ABS wire harness through holes 1-5 are arranged on the horizontal plane of the brake bottom plate 1 and outside the brake flange matching holes 1-3; dust blocking disc connecting bolt holes 1-6 are designed in the middle of the brake bottom plate 1 and around the brake bottom plate connecting bolt holes 1-4 along the outer side of the diameter direction; the lower end of the brake bottom plate 1 is provided with two brake shoe pin shaft mounting holes 1-7;

referring to fig. 4, 5 and 6, a rolling cam 2-1 is arranged at the left end of the camshaft 2, and the rolling cam 2-1 is shaped like a mirror image english letter "S"; the right side of the camshaft 2 is provided with an automatic adjusting arm matched with an external spline 2-2; a clamp spring groove 2-3 is arranged at the right end shaft diameter of the camshaft 2; a brake shoe friction plate abrasion alarm sensor fixing key groove 2-4 is formed in the top end of the right end of the camshaft 2 in the axial diameter direction;

referring to fig. 7, the driving brake shoe belt friction plate assembly 7 and the driven brake shoe belt friction plate assembly 8 are composed of a brake shoe assembly 7-1, a first friction plate 7-2, a second friction plate 7-3, a rivet 7-4, a return spring hanging pin 7-5, a roller shaft 7-6 and a torsion spring 7-7; the brake shoe assembly 7-1 is composed of a brake shoe panel 7-8 and two brake shoe studs 7-9 arranged on two sides of a vertical plane of the brake shoe panel 7-8, wherein the brake shoe panel 7-8 and the brake shoe studs 7-9 are formed by stamping and welding; the No. I friction plate 7-2 is arranged on the lower rear portion of the brake shoe assembly 7-1, the No. II friction plate 7-3 is arranged on the upper rear portion of the brake shoe assembly 7-1, and the No. I friction plate 7-2 and the No. II friction plate 7-3 are fixedly connected with the brake shoe assembly 7-1 through rivets 7-4; the return spring hanging pin 7-5 is arranged in a return spring hanging pin mounting hole 7-10 arranged at the upper part of the brake shoe stud 7-9; the roller shaft 7-6 is arranged in a roller shaft mounting hole 7-11 arranged at the upper part of the brake shoe stud 7-9 through a torsion spring 7-7; the middle lower part of the brake shoe stud 7-9 is provided with a tension spring hanging hole 7-12;

referring to fig. 8, the cam bracket 12 is provided with a camshaft mounting hole 12-1 along the inner side in the diameter direction; a cam bracket connecting plate 12-2 is arranged on the left side of the middle part of the cam bracket 12, and four cam bracket connecting bolt holes 12-3 are arranged on the periphery of the cam bracket connecting plate 12-2; an air chamber bracket 12-4 is arranged on the right side of the middle part of the cam bracket 12, and two spring brake cylinder connecting bolt mounting holes 12-5 are arranged on the upper part of the air chamber bracket 12-4; an automatic adjusting arm support connecting arm 12-6 is arranged at the upper part of the right end of the cam support 12, and two automatic adjusting arm support connecting bolt holes 12-7 are arranged on the automatic adjusting arm support connecting arm 12-6;

referring to fig. 9, the middle of the automatic adjusting arm 17 is provided with an internal spline 17-1 matched with a camshaft, the upper end of the middle of the automatic adjusting arm 17 is provided with a brake lining wear alarm sensor positioning pin mounting hole 17-2, the middle of the automatic adjusting arm 17 is provided with an automatic adjusting arm automatic adjusting mechanism 17-3 along the outer side of the diameter direction, and the upper end of the automatic adjusting arm 17 is provided with a spring brake cylinder connecting fork matching hole 17-4;

referring to fig. 1, 10, 11, 12, 13, 14 and 15, the camshaft 2 is disposed above the brake spider 1; the camshaft gasket 3 is arranged between the camshaft 2 and the brake bottom plate 1, and the camshaft gasket 3 is used for preventing the camshaft 1 from rubbing the brake bottom plate 1 in the working and rotating process, so that the brake bottom plate 1 is damaged due to friction; the brake shoe pin shaft 4 is arranged in a brake shoe pin shaft mounting hole 1-7 arranged at the lower end of the brake bottom plate 1, and the brake shoe pin shaft 4 is in interference fit with the brake shoe pin shaft mounting hole 1-7; the driving brake shoe belt friction plate assembly 7 is arranged on the left side and the front side of the brake bottom plate 1, the driven brake shoe belt friction plate assembly 8 is arranged on the left side and the rear side of the brake bottom plate 1, the driving brake shoe belt friction plate assembly 7 and the driven brake shoe belt friction plate assembly 8 are respectively matched and fixed on the front side and the rear side of the left side of the brake bottom plate 1 through a return spring 5 and a tension spring 6, the return spring 5 is hung between return spring hanging pins 7-5 arranged on the driving brake shoe belt friction plate assembly 7 and the driven brake shoe belt friction plate assembly 8, the tension spring 6 is hung on tension spring hanging holes 7-12 arranged on the driving brake shoe belt friction plate assembly 7 and the driven brake shoe belt friction plate assembly 8, and the return spring 5 and the tension spring 6 are used for stopping braking, returning the driving brake shoe belt friction plate assembly 7 and the driven brake shoe belt friction plate assembly 8 to original positions; the front dust-blocking disc 9 is arranged on the right side and the front side of the brake bottom plate 1, the rear dust-blocking disc 10 is arranged on the right side and the rear side of the brake bottom plate 1, the front dust-blocking disc 9 and the rear dust-blocking disc 10 are fixed on the brake bottom plate 1 through the dust-blocking disc connecting bolts 11, and the front dust-blocking disc 9 and the rear dust-blocking disc 10 are used for preventing sundries such as soil, sand and stones and the like from entering a brake assembly to cause brake failure and traffic accidents; the cam bracket 12 is arranged above the right side of the brake bottom plate 1, and the cam bracket 12 is fixedly connected with the brake bottom plate 1 through a cam bracket connecting bolt 13; the spring brake cylinder 14 is arranged on the cam bracket 12, and the spring brake cylinder 14 is fixedly connected with the cam bracket 12 through a spring washer 15 and a nut 16; the automatic adjusting arm 17 is arranged at the right end of the cam bracket 12 and is connected with an automatic adjusting arm matching external spline 2-2 arranged on the cam shaft 2 through a cam shaft matching internal spline 17-1, and the automatic adjusting arm 17 is connected with the spring brake cylinder 14 through a spring brake cylinder fixing pin 26, a flat gasket 27 and a split pin 28; an adjusting shim 18 and an automatic adjusting arm support 19 are arranged between the automatic adjusting arm 17 and the cam support 12, the automatic adjusting arm support 19 fixes an automatic adjusting mechanism 17-3 of the automatic adjusting arm 17 and an automatic adjusting arm support connecting arm 12-6 arranged on the cam support 12 through an automatic adjusting arm support connecting bolt 20 and an automatic adjusting arm support fixing bolt 21 respectively, the adjusting shim 18 is used for ensuring that the automatic adjusting arm 17 can be in an ideal matching position, and the automatic adjusting arm support 19 is used for fixing the automatic adjusting mechanism 17-3 arranged on the automatic adjusting arm 17 and the automatic adjusting arm support connecting arm 16-6 arranged on the cam support 12; the brake friction plate abrasion alarm sensor 22 is arranged at the right end of the automatic adjusting arm 17, the brake friction plate abrasion alarm sensor 22 is fixed with the automatic adjusting arm 17 through a positioning pin 25, and the brake friction plate abrasion alarm sensor 22 is connected with a brake shoe friction plate abrasion alarm sensor fixing key groove 2-4 arranged at the top end of the shaft diameter position at the right end of the camshaft 2 in a matching mode through a matching key 22-1 arranged in the middle of the brake friction plate abrasion alarm sensor; a brake friction plate abrasion alarm sensor fixing baffle 23 is arranged at the right end of the brake friction plate abrasion alarm sensor 22; a clamp spring 24 is arranged on the right side of the fixed baffle 23 of the brake friction plate abrasion alarm sensor;

the camshaft 2, the camshaft washer 3, the cam bracket 12, the automatic adjusting arm 17, the adjusting shim 18, the brake friction plate abrasion alarm sensor 22, the brake friction plate abrasion alarm sensor fixing baffle plate 23 and the clamp spring 24 are arranged on the same axis;

the brake assembly with the corner type brake shoe friction plate abrasion alarm device has the working principle that when a running vehicle brakes, a push rod of the spring brake cylinder 14 can push the automatic adjusting arm 17 to rotate around the camshaft 2 and generate rotating torque, the automatic adjusting arm 17 transmits the rotating torque to the camshaft 2 through a spline, so that a rolling cam 2-1 arranged on the camshaft 2 rotates, the rolling cam 2-1 arranged on the camshaft 2 transmits the rotating torque to the driving brake shoe belt friction plate assembly 7 and the driven brake shoe belt friction plate assembly 8, the driving brake shoe belt friction plate assembly 7 and the driven brake shoe belt friction plate assembly 8 generate outward-supported tension, and the driving brake shoe belt friction plate assembly 7 and the driven brake shoe belt friction plate assembly 8 are in friction with a brake drum, thereby generating a braking force to stop the running vehicle; in the process of running and braking of the vehicle, the No. I friction plate 7-2 and the No. II friction plate 7-3 are continuously worn and thinned, the automatic adjusting arm 17 is continuously adjusted and compensated through the automatic adjusting mechanism, so that the braking gap between the braking friction plate and the brake drum is always in a specified range, and the whole vehicle can ensure enough braking force, and meanwhile, as the braking friction plate wear alarm sensor 22 and the automatic adjusting arm 17 are fixedly connected through the braking friction plate wear alarm sensor positioning pin 25 and are matched and connected with the camshaft 2 through the braking friction plate wear alarm sensor matching key 22-1 and the braking shoe friction plate wear alarm sensor fixing key slot 2-4 arranged at the top end of the right end shaft diameter of the camshaft 2, when the automatic adjusting arm 17 is continuously adjusted through the automatic adjusting mechanism, During compensation, the brake lining wear alarm sensor 22 can detect the adjustment and compensation amount of the automatic adjusting arm 17, namely the adjustment rotation angle difference between the automatic adjusting arm 17 and the camshaft 2; when the No. I friction plate 7-2 and the No. II friction plate 7-3 reach the abrasion limit, the brake friction plate abrasion alarm sensor 22 detects that the adjusting rotation angle difference between the automatic adjusting arm 17 and the camshaft 2 also reaches the specified limit value, so that the information that the brake shoe friction plate reaches the abrasion limit is transmitted to a driver through an electric signal, and the abrasion alarm function of the brake shoe friction plate is achieved.

Promptly a stopper assembly with corner formula brake shoe friction disc wearing and tearing alarm device's core be through brake friction disc wearing and tearing alarm sensor detect the adjustment corner difference between automatic adjustment arm and the camshaft and judge whether the brake shoe friction disc reaches the limit of wearing and tearing to turn into the signal of telecommunication with corner displacement signal, turn into the signal of telecommunication again and report to the police to the driver in the driver's cabin with signals such as sound, light.

The utility model can monitor the abrasion limit of the brake shoe friction plate without changing the brake assembly body and only by correspondingly changing the camshaft, and the abrasion alarm sensor of the brake friction plate can be repeatedly used, thereby having long service life and ultrahigh cost performance; meanwhile, the brake shoe friction plate abrasion alarm sensor is externally arranged in a friction working area of the brake shoe friction plate and the brake drum, is far away from a high-temperature source, and can stably and accurately detect whether the brake shoe friction plate reaches an abrasion limit; the utility model discloses can be quick, whether accurate definite brake shoe friction disc reaches the wearing and tearing limit, and through sound, signals such as light report to the police to the driver in the driver's cabin, make the driver can discover the information that the brake shoe friction disc has reached the wearing and tearing limit in the driver's cabin, remind the driver to in time change the brake shoe friction disc, thereby avoided because of the excessive wearing and tearing of brake shoe friction disc, and lead to rivet and brake drum contact friction, the traffic accident that causes loses brake ability, or change in advance because the brake shoe friction disc does not reach the wearing and tearing limit, cause the extravagant problem of friction disc material.

Claims (7)

1. The brake assembly is characterized by comprising a brake bottom plate (1), a camshaft (2), a camshaft washer (3), a brake shoe pin shaft (4), a return spring (5), a tension spring (6), a driving brake shoe belt friction plate assembly (7), a driven brake shoe belt friction plate assembly (8), a front dust blocking disc (9), a rear dust blocking disc (10), a dust blocking disc connecting bolt (11), a cam bracket (12), a cam bracket connecting bolt (13), a spring brake cylinder (14), a spring washer (15), a nut (16), an automatic adjusting arm (17), an adjusting gasket (18), an automatic adjusting arm bracket (19), an automatic adjusting arm bracket connecting bolt (20), an automatic adjusting arm bracket fixing bolt (21), a brake friction plate wear alarm sensor (22), The brake lining wear alarm device comprises a brake lining wear alarm sensor fixing baffle plate (23), a clamp spring (24), a brake lining wear alarm sensor positioning pin (25), a spring brake cylinder fixing pin (26), a flat gasket (27) and a split pin (28);

the camshaft (2) is arranged above the brake bottom plate (1); the camshaft gasket (3) is arranged between the camshaft (2) and the brake bottom plate (1); the brake shoe pin shaft (4) is arranged in a brake shoe pin shaft mounting hole (1-7) arranged at the lower end of the brake bottom plate (1); the brake shoe pin shaft (4) is in interference fit with the brake shoe pin shaft mounting holes (1-7); the active brake shoe with friction plate assembly (7) is arranged on the left side and the front side of the brake bottom plate (1); the driven brake shoe iron belt friction plate assembly (8) is arranged on the left side and the rear side of the brake bottom plate (1); the driving brake shoe belt friction plate assembly (7) and the driven brake shoe belt friction plate assembly (8) are respectively matched with the cam shaft (2) and the brake shoe pin shaft (4) through a return spring (5) and a tension spring (6) and are fixed on the front side and the rear side of the left side of the brake bottom plate (1); the return spring (5) is hung between return spring hanging pins (7-5) arranged on the driving brake shoe belt friction plate assembly (7) and the driven brake shoe belt friction plate assembly (8); the tension spring (6) is hung on tension spring hanging holes (7-12) arranged on the driving brake shoe belt friction plate assembly (7) and the driven brake shoe belt friction plate assembly (8); the front dust blocking disc (9) is arranged on the right side and the front side of the brake bottom plate (1); the rear dust-blocking disc (10) is arranged on the right side and the rear side of the brake bottom plate (1); the front dust-blocking disc (9) and the rear dust-blocking disc (10) are fixed on the brake bottom plate (1) through dust-blocking disc connecting bolts (11); the cam bracket (12) is arranged above the right side of the braking bottom plate (1); the cam bracket (12) is fixedly connected with the brake bottom plate (1) through a cam bracket connecting bolt (13); the spring brake cylinder (14) is arranged on the cam bracket (12); the spring brake cylinder (14) is fixedly connected with the cam bracket (12) through a spring washer (15) and a nut (16); the automatic adjusting arm (17) is arranged at the right end of the cam bracket (12) and is connected with an automatic adjusting arm matched external spline (2-2) arranged on the cam shaft (2) through a cam shaft matched internal spline (17-1); the automatic adjusting arm (17) is connected with the spring brake cylinder (14) through a spring brake cylinder fixing pin (26), a flat gasket (27) and a split pin (28); an adjusting gasket (18) and an automatic adjusting arm bracket (19) are arranged between the automatic adjusting arm (17) and the cam bracket (12); the automatic adjusting arm bracket (19) fixes an automatic adjusting mechanism (17-3) of the automatic adjusting arm (17) and an automatic adjusting arm bracket connecting arm (12-6) arranged on the cam bracket (12) through an automatic adjusting arm bracket connecting bolt (20) and an automatic adjusting arm bracket fixing bolt (21) respectively; the brake friction plate abrasion alarm sensor (22) is arranged at the right end of the automatic adjusting arm (17); the brake friction plate abrasion alarm sensor (22) is fixed with the automatic adjusting arm (17) through a positioning pin (25); the brake friction plate abrasion alarm sensor (22) is matched and connected with a brake shoe friction plate abrasion alarm sensor fixing key groove (2-4) arranged at the top end of the shaft diameter position at the right end of the camshaft (2) through a matching key (22-1) arranged in the middle of the brake friction plate abrasion alarm sensor; a brake friction plate abrasion alarm sensor fixing baffle (23) is arranged at the right end of the brake friction plate abrasion alarm sensor (22); a snap spring (24) is arranged on the right side of the fixed baffle plate (23) of the brake friction plate abrasion alarm sensor.

2. The brake assembly with the corner type brake shoe friction plate wear warning device is characterized in that a cam bracket mounting hole (1-1) is formed in the upper end of the brake base plate (1); four cam bracket connecting bolt inner threaded holes (1-2) are formed in the periphery of the cam bracket mounting hole (1-1); the middle part of the brake bottom plate (1) is provided with a brake flange matching hole (1-3); brake bottom plate connecting bolt holes (1-4) are arranged around the brake flange matching holes (1-3); two ABS wire harness through holes (1-5) are arranged on the horizontal plane of the brake bottom plate (1) and outside the brake flange matching holes (1-3); dust blocking disc connecting bolt holes (1-6) are arranged in the middle of the brake bottom plate (1) and around the brake bottom plate connecting bolt holes (1-4) along the outer side of the diameter direction; the lower end of the brake bottom plate (1) is provided with two brake shoe pin shaft mounting holes (1-7).

3. The brake assembly with the corner type brake shoe friction plate wear warning device is characterized in that a rolling cam (2-1) is arranged at the left end of the cam shaft (2), and the shape of the rolling cam (2-1) is a mirror image pair of S shapes; the right side of the camshaft (2) is provided with an automatic adjusting arm matched with an external spline (2-2); a clamp spring groove (2-3) is arranged at the right end shaft diameter of the camshaft (2); the top end of the right end shaft diameter part of the camshaft (2) is provided with a brake shoe friction plate abrasion alarm sensor fixing key groove (2-4).

4. The brake assembly with the corner type brake shoe friction plate wear warning device according to claim 1, wherein the driving brake shoe friction plate assembly (7) and the driven brake shoe friction plate assembly (8) respectively comprise a brake shoe iron assembly (7-1), a friction plate I (7-2), a friction plate II (7-3), a rivet (7-4), a return spring hanging pin (7-5), a roller shaft (7-6) and a torsion spring (7-7); the brake shoe assembly (7-1) consists of a brake shoe panel (7-8) and two brake shoe studs (7-9) arranged on two sides of a vertical plane of the brake shoe panel (7-8); the brake shoe panel (7-8) and the brake shoe stud (7-9) are formed by stamping and welding; the No. I friction plate (7-2) is arranged on the lower rear part of the brake shoe assembly (7-1); the No. II friction plate (7-3) is arranged at the upper part of the rear part of the brake shoe assembly (7-1); the No. I friction plate (7-2) and the No. II friction plate (7-3) are fixedly connected with a brake shoe assembly (7-1) through rivets (7-4); the return spring hanging pin (7-5) is arranged in a return spring hanging pin mounting hole (7-10) arranged at the upper part of the brake shoe stud (7-9); the roller shaft (7-6) is arranged in a roller shaft mounting hole (7-11) arranged at the upper part of the brake shoe stud (7-9) through a torsion spring (7-7); and tension spring hanging holes (7-12) are formed in the middle lower parts of the brake shoe vertical ribs (7-9).

5. A brake assembly with a corner brake shoe friction plate wear warning device as claimed in claim 1, characterized in that said cam bracket (12) is provided with a cam shaft mounting hole (12-1) at the inner side in the diameter direction; a cam bracket connecting plate (12-2) is arranged on the left side of the middle part of the cam bracket (12); four cam bracket connecting bolt holes (12-3) are arranged around the cam bracket connecting plate (12-2); an air chamber bracket (12-4) is arranged on the right side of the middle part of the cam bracket (12), and two spring brake cylinder connecting bolt mounting holes (12-5) are formed in the upper part of the air chamber bracket (12-4); the upper part of the right end of the cam bracket (12) is provided with an automatic adjusting arm bracket connecting arm (12-6); two automatic adjusting arm bracket connecting bolt holes (12-7) are arranged on the automatic adjusting arm bracket connecting arm (12-6).

6. The brake assembly with the corner type brake shoe friction plate wear warning device is characterized in that an internal spline (17-1) matched with a cam shaft is arranged in the middle of the automatic adjusting arm (17); the upper end of the middle part of the automatic adjusting arm (17) is provided with a brake friction plate abrasion alarm sensor positioning pin mounting hole (17-2); the middle part of the automatic adjusting arm (17) is provided with an automatic adjusting mechanism (17-3) of the automatic adjusting arm along the outer side of the diameter direction; the upper end of the automatic adjusting arm (17) is provided with a spring brake cylinder connecting fork matching hole (17-4).

7. The brake assembly with the corner type brake shoe friction plate wear warning device according to claim 1, wherein the camshaft (2), the camshaft washer (3), the cam bracket (12), the automatic adjusting arm (17), the adjusting shim (18), the brake plate wear warning sensor (22), the brake plate wear warning sensor fixing baffle plate (23) and the clamp spring (24) are arranged on the same axis.

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