CN212654342U

CN212654342U - Disc brake pad wear monitoring sensor and alarm system

Info

Publication number: CN212654342U
Application number: CN202021099918.3U
Authority: CN
Inventors: 李鹏飞; 田召义
Original assignee: Shandong Gold Phoenix Co Ltd
Current assignee: Shandong Gold Phoenix Co Ltd
Priority date: 2020-06-15
Filing date: 2020-06-15
Publication date: 2021-03-05
Anticipated expiration: 2030-06-15

Abstract

The utility model provides a disc brake block wearing and tearing monitoring sensor and alarm system, disc brake block wearing and tearing monitoring sensor, include: the device comprises a shell, a sensor shaft, a guide wheel, a soft traction body, a circumferential restoring body, a multistage magnet and a semiconductor sensor; the sensor shaft is rotatably arranged in the shell; the guide wheel is arranged on the sensor shaft, and the edge of the guide wheel is provided with a rope groove; one end of the soft traction body is fixed on the guide wheel, and the other end of the soft traction body is wound in the rope groove for a set number of turns and then penetrates out of the shell; one end of the circumferential restoring body is fixed on the wall body of the cavity, and the other end of the circumferential restoring body is fixed on the guide wheel; the multistage magnet is coaxially arranged at the end part of the sensor shaft; the semiconductor sensor is arranged on the inner wall of the shell corresponding to the multistage magnet, and a lead on the semiconductor sensor penetrates out of the shell from the cavity. The utility model discloses can effectively solve disc brake block wearing and tearing and should not discover to extreme condition, cause the brake to become invalid easily, have the problem of potential safety hazard.

Description

Disc brake pad wear monitoring sensor and alarm system

Technical Field

The utility model relates to a braking equipment field, especially a disk brake block wearing and tearing monitoring sensor and alarm system.

Background

The brake pad is an important component in a vehicle braking system and is one of the parts which are worn the fastest in the use process of a vehicle, and the vehicle is forced to decelerate and stop by using the friction plate in the braking process, so the friction plate is worn and becomes thinner, and the friction plate needs to be replaced when the wear reaches a certain limit, otherwise, the hidden danger of driving is brought, and the safety of drivers and passengers is threatened.

At present, an electronic wire harness alarm or a mechanical alarm device is generally adopted for a disc brake pad, and although the mechanical alarm device is simple in structure, the alarm sound volume is difficult to grasp in the driving process, the situation that a driver cannot hear the alarm sound volume is sometimes caused, and the problems that the driver cannot hear the alarm sound volume, the driver feels loud and harsh and the environment is sometimes caused are also caused. The electronic wire harness alarm is characterized in that an alarm wire harness is pre-buried in a new brake lining, and the buried depth of a wire of the electronic wire harness alarm is equivalent to the wear limit. When the lining is worn to the limit, the lead wire is worn off, and the alarm device gives out sound and light to give an alarm. This kind of mode can only receive the change signal when the brake block is about to scrap, can not monitor the friction disc use, and the pencil that uses simultaneously is disposable, increases the use cost, and the resource is wasted, and in addition, pencil and brake block cooperation end generally adopt high temperature resistant plastics or bakelite etc. if the brake process lasts high temperature and can cause its chap and have the risk that drops, influence driving safety.

Although the prior art also has the technical scheme that a resistor is connected in parallel to control and monitor in a segmented mode, and a feedback controller is converted into an abrasion loss when a current change signal is generated due to the fact that one resistor is broken, the technical scheme has the defects that elements are complex to process and not easy to realize, the resistor is greatly influenced by temperature, the reliability is poor, an alarm wire harness needs to be replaced when a brake pad is replaced, the use cost is high, and real-time monitoring is not performed. There is also the technical scheme through the light beam reflection among the detection braking process, realizes the detection of brake friction disc wearing and tearing condition and stopper braking situation, but light displacement sensor installs on the brake disc, and the brake disc is pivoted, and is great to the influence of optic fibre, and the plane of reflection receives vehicle operational environment influence, causes easily and reads the error, influences driving safety, and this technical scheme has special processing requirement to the brake disc simultaneously, should not apply in the actual production.

SUMMERY OF THE UTILITY MODEL

In view of the above prior art's shortcoming, the utility model aims to provide a disk brake block wearing and tearing monitoring sensor and alarm system for solve prior art disk brake block and should not discover to extreme condition wearing and tearing, cause the brake to become invalid easily, have the problem of serious potential safety hazard.

In order to achieve the above objects and other related objects, the utility model provides a disc brake block wearing and tearing monitoring sensor, include:

the device comprises a shell, a first fixing piece and a second fixing piece, wherein a cavity is arranged in the shell;

the sensor shaft is arranged in the cavity and is allowed to rotate by taking the axis of the sensor shaft as a rotating shaft;

the guide wheel is arranged on the sensor shaft and rotates along with the sensor shaft, and a rope groove is formed in the edge of the guide wheel;

one end of the soft traction body is fixed on the guide wheel, and the other end of the soft traction body is wound in the rope groove for a set number of turns and then penetrates out of the shell from the cavity;

the circumferential restoring body is sleeved outside the sensor shaft, one end of the circumferential restoring body is fixed on the wall body of the cavity, and the other end of the circumferential restoring body is fixed on the guide wheel;

a multi-stage magnet coaxially mounted at an end of the sensor shaft;

the semiconductor sensor is arranged on the inner wall of the cavity and corresponds to the multistage magnet, and a lead on the semiconductor sensor penetrates out of the shell from the cavity.

As an example of the sensor of the present invention, the semiconductor sensor includes a hall sensor.

As an example of the sensor of the present invention, the circumferential reset body includes a torsion spring.

As an example of the sensor of the present invention, the soft pulling body is located at one end outside the housing, and the soft pulling body is provided with a brake pad connecting portion for detachable connection with the brake pad steel backing.

As an example of the present invention, the brake pad connecting portion includes: the shaft body, the stop body and the elastic tightening body; one end of the shaft body is provided with a stop table, and the other end of the shaft body penetrates through a mounting hole in the steel back to be connected with the stop body; the elastic stretching body is sleeved on the shaft body, two ends of the elastic stretching body are respectively pressed and abutted against the stop table and the steel back of the brake pad, and the soft traction body is connected with the shaft body.

As an example of the present invention, a clamping groove is provided on the shaft body, and the stop body includes an elastic collar clamped in the clamping groove.

As an example of the sensor of the present invention, the multistage magnet is mounted on the sensor shaft through an expansion sleeve.

As an example of the sensor of the present invention, the housing is provided with detachable end caps along two sides of the extending direction of the sensor axis; the semiconductor sensor is arranged on one of the end covers, and one end of the sensor shaft, which is far away from the semiconductor sensor, is rotatably arranged on the other end cover.

As an example of the sensor of the present invention, the end cap is provided with a positioning structure matching with the housing.

The utility model also provides a disc brake block alarm system, disc brake block compresses tightly to the brake disc along sharp direction on, disc brake block alarm system includes: the disc brake pad wear monitoring sensor comprises a controller, an alarm and any one of the disc brake pad wear monitoring sensors, wherein the end part of a soft traction body positioned outside a shell of the disc brake pad wear monitoring sensor is connected with the disc brake pad, a power line of a semiconductor sensor is electrically connected with a power supply device, a signal line of the semiconductor sensor is electrically connected with the controller, and the controller is electrically connected with the alarm.

As an example of the alarm system of the present invention, a through hole is provided on the brake caliper of the disc brake pad, the end of the soft traction body is provided with a guide pillar that is guided by the through hole in a matching manner, and the guide pillar is along the through hole in the braking process.

As above, the utility model discloses disc brake block wearing and tearing monitoring sensor converts the wearing and tearing volume of brake block into the change output of signal of telecommunication through hall sensor, can feed back out the wearing and tearing situation of brake block in real time, can cooperate with on-vehicle controller and display system, and the information that the driver and crew of being convenient for can in time pay close attention to relevant brake block wearing and tearing volume to and take corresponding measure in time, improved driving safety nature. The utility model discloses the sensor easily assembles and uses, can used repeatedly many times, and is with low costs. The utility model discloses a soft tractive style design of sensor can make the sensor install in the regional outside of braking, and the high temperature that receives the friction production influences for a short time, stable performance, and is longe-lived. The utility model discloses alarm system can in time report to the police when the wearing and tearing volume surpasss the settlement scope, and fail safe nature is high.

Drawings

FIG. 1 is a schematic view of the mounting structure of the sensor on the disc brake pad of the present invention;

fig. 2 is a schematic structural diagram of an embodiment of the sensor of the present invention;

FIG. 3 is a top view of FIG. 2;

fig. 4 is a schematic view of a connection relationship between a brake pad connection portion and a brake pad in an example of the sensor of the present invention;

fig. 5 is a schematic view of a connection relationship between a brake pad connection portion and a brake pad in an example of the sensor of the present invention;

fig. 6 is a schematic structural view of a shaft body in a brake pad connecting portion according to an example of the present invention;

FIG. 7 is a side view of FIG. 6;

fig. 8 is a schematic structural view of a side end cap of a torsion spring according to an embodiment of the present invention;

FIG. 9 is a cross-sectional view of FIG. 8;

fig. 10 is a schematic structural diagram of a guide wheel according to an example of the sensor of the present invention;

FIG. 11 is a top view of FIG. 10;

fig. 12 is a schematic view of a sensor shaft in an example of the sensor of the present invention;

fig. 13 is a side view of fig. 12.

In the figure:

1 vehicle-mounted control display unit

2 disc type brake pad wear monitoring sensor

3 brake caliper

4 brake disc

5 brake pad

6 piston

21 elastic collar

22 shaft body

221 card slot

222 guide post

23 elastic supporting body

24 torsion spring

25 first end cap

251 torsional spring fixing groove

252 positioning structure

26 first bolt

27 Soft pulling body

28 guide wheel

281 second key groove

282 card hole

283 rope groove

29 casing

30 flat key

31 sensor shaft

311 first key groove

32 bearing

33 conducting wire

34 multistage magnet

35 semiconductor sensor

36 expansion sleeve

37 second end cap

38 second bolt

39 shell fixing seat

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

It should be noted that the drawings provided in the present embodiment are only schematic and illustrative of the basic idea of the present invention, and although the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation, the form, quantity and proportion of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.

As shown in fig. 1 to 13, the utility model provides a disc brake block wearing and tearing monitoring sensor 2, disc brake block 5 is installed on brake caliper 3 to promote extrusion friction brake disc 4 through piston 6 and come to brake the vehicle, disc brake block wearing and tearing monitoring sensor 2 includes: a shell 29, a sensor shaft 31, a guide wheel 28, a soft pulling body 27, a circumferential restoring body, a multi-stage magnet 34 and a semiconductor sensor 35;

a chamber is arranged in the shell 29;

the sensor shaft 31 is arranged in the cavity and is allowed to rotate by taking the axis of the sensor shaft as a rotating shaft, and a first key slot 311 is formed in the sensor shaft 31;

the guide wheel 28 is provided with a second key slot 281, the guide wheel 28 is mounted on the sensor shaft 31 and fixed to rotate with the sensor shaft 31 through a flat key 30, and the edge of the guide wheel 28 is provided with a rope slot 283;

one end of the soft pulling body 27 is fixed on the guide wheel 28, and the other end of the soft pulling body 27 is wound in the rope groove 283 for a set number of turns and then penetrates out of the shell 29 from the cavity;

the circumference restoring body is sleeved outside the sensor shaft 31, one end of the circumference restoring body is fixed on the wall body of the cavity, and the other end of the circumference restoring body is fixed on the guide wheel 28;

the multistage magnet 34 is coaxially mounted on the end of the sensor shaft 31;

the semiconductor sensor 35 is mounted on the inner wall of the chamber and corresponds to the multi-stage magnet 34, and the lead 33 (including power and signal lines) on the semiconductor sensor 35 passes out of the housing 29 from the chamber. It should be noted that the semiconductor sensor in the present invention may be any suitable sensor form having the same principle or function as the hall sensor, and as an example of the present invention, the semiconductor sensor is a hall sensor.

The utility model discloses disc brake block wearing and tearing monitoring sensor 2 converts the wearing and tearing volume of brake block 5 into the change output of signal of telecommunication through hall sensor, can with the controller, the display, the wearing and tearing situation of brake block 5 is fed back in real time to outer device (like the on-vehicle control display element on the vehicle) of joining in marriage such as alarm combine together, the driver and crew of being convenient for can in time pay close attention to the information about 5 wearing and tearing volumes of brake block to and take corresponding measure in time, in addition the utility model discloses the sensor can cooperate with on-vehicle control display element 1 and convert the wearing and tearing volume into visual digital display and acousto-optic warning, can realize the real time monitoring and the wearing and tearing extreme state warning to 5 wearing and tearing situations of disc brake block, has improved driving safety nature. Additionally the utility model discloses sensor simple structure, easily assembly and use, sensor can repetitious usage, and is with low costs, and the utility model discloses a soft pulling body 27 formula designs of sensor can make the sensor install in the regional outside of braking, and the high temperature that receives the friction production influences for a short time, stable performance, and is longe-lived.

The utility model discloses soft pulling body 27 among the sensor can be for can twining and all suitable rope materials of tractive guide pulley pivoted, in the embodiment of the utility model a soft pulling body 27 is stainless steel wire rope.

The utility model discloses circumference among the sensor resets the body and can be for making all structures that sensor axle 31 resets on the circumferencial direction, if be spiral helicine reed or torsional spring 24 the utility model relates to an embodiment, circumference reset body is

torsional spring

24, 24 suits of torsional spring are in on the sensor axle 31, be provided with torsional spring fixed slot 251 on the first end cover 25 on sensor axle 31 upper portion, be provided with card hole 282 on the guide pulley 28 of 24 lower parts of torsional spring, 24 little end spring silk end fixing of torsional spring 24 in the torsional spring fixed

slot

251, 24's main aspects spring silk end insert is fixed in card hole 282 on the guide pulley 28.

The utility model discloses soft pulling body 27 and brake block 5's fixed mode can be all can be with soft pulling body 27 and the reliable fixed suitable structure of brake block 5 steel backing or clutch blocks in the sensor the utility model relates to an embodiment, soft pulling body 27 is located the outer one end of casing 29 is provided with and is used for can dismantling the brake block 5 connecting portion of connection with the brake block 5 steel backing. The detachable connection mode can greatly reduce the installation difficulty of the sensor, and can effectively improve the working efficiency.

The utility model discloses brake block 5 connecting portion among the sensor can be for can dismantling fixed suitable structure with soft traction body 27 and the 5 steel backs of brake block or clutch blocks the conduct the utility model discloses in the sensor example, brake block 5 connecting portion include: a shaft body 22, a stopper body, and an elastic tightening body 23 (a compression spring in the present embodiment); one end of the shaft body 22 is provided with a stop table, and the other end of the shaft body 22 passes through a mounting hole on the steel back to be connected with the stop body; the elastic tightening body 23 is sleeved on the shaft body 22, two ends of the elastic tightening body are respectively pressed and abutted against the stop table and the steel back of the brake pad 5, and the soft traction body 27 is connected with the shaft body 22. The structure not only can be reliably connected, but also is convenient to mount and dismount.

The utility model discloses the backstop body in the 5 connecting portions of brake block can be for can fixing all backstop structures outside the mounting hole on the steel backing at 22 tip of axis body and backstop in the sensor, if set up a bolt or convex part etc. on axis body 22, as the utility model discloses an example of sensor, be provided with draw-in groove 221 on the axis body 22, the backstop body is including clamping elasticity rand 21 in the draw-in groove 221. The elastic clamping ring 21 is convenient to install.

The utility model discloses multistage magnet 34 can not be injectd on sensor axle 31 installation form among the sensor, as the utility model discloses an example of sensor, multistage magnet 34 is installed through tight cover 36 that expands on sensor axle 31. Through the tight cover 36 simple to operate that expands swift, can improve the installation effectiveness.

The utility model discloses sensor shaft 31 can not be injectd in the rotatable mounting means of cavity in the sensor, nevertheless considers the rotation resistance, does the utility model discloses a sensor example, be provided with bearing 32 between the wall body of sensor shaft 31 and cavity. In view of convenience of installation, in an example of the sensor of the present invention, the housing 29 is provided with a first end cap 25 and a second end cap 37 which are detachable on both sides along the extending direction of the sensor axis 31; the first end cap 25 and the second end cap 37 are connected to the housing 29 by a first bolt 26, the semiconductor sensor 35 is mounted on the second end cap 37 by a second bolt 38, and an end of the sensor shaft 31 facing away from the semiconductor sensor 35 is rotatably mounted on the first end cap 25.

As an example of the sensor of the present invention, the first end cap 25 and the second end cap 37 are provided with a positioning structure 252 matching with the housing 29.

In order to facilitate the fixed installation, in the utility model discloses in the sensor example, still be provided with casing fixing base 39 on the casing 29, casing 29 passes through casing fixing base 39 is installed on the brake caliper 3.

The utility model discloses a disc brake block 5 alarm system is provided in another embodiment, disc brake block 5 compresses tightly to brake disc 4 along the sharp direction on, and disc brake block 5 alarm system includes: the disc brake pad wear monitoring sensor 2 comprises a controller, an alarm and the disc brake pad wear monitoring sensor 2 according to any one of the embodiments, wherein the disc brake pad wear monitoring sensor 2 is positioned at the end part of the soft traction body 27 outside the shell 29 and is connected with the disc brake pad 5, a power line of the semiconductor sensor 35 is electrically connected with a power supply device, a signal line of the semiconductor sensor 35 is electrically connected with the controller, and the controller is electrically connected with the alarm.

The utility model discloses alarm system can in time report to the police when the wearing and tearing volume surpasss the settlement scope, and fail safe nature is high. Additionally the utility model discloses sensor among the alarm system adopts soft tractive body 27 formula designs can make the sensor install in the regional outside of braking, and the high temperature that receives the friction production influences for a short time, stable performance, and is longe-lived.

In order to guarantee the accuracy of wearing and tearing volume, the utility model discloses the outer soft pulling body 27 tip of well casing 29 should follow perpendicular to brake block 5 friction surface direction linear movement, as the utility model discloses an alarm system example, the sensor is installed the outside of brake caliper 3, be provided with the through-hole on the brake caliper 3 of disc brake block 5, the tip of soft pulling body 27 be provided with the guide pillar 222 of through-hole matched with direction, the guide pillar 222 is followed at the braking in-process the through-hole removes. In consideration of the detachable installation manner adopted in the sensor, in an example of the present invention, the guide post 222 is disposed on the shaft body 22 of the connection portion of the brake pad 5.

In view of the fact that the vehicle is provided with an integrated control display unit, in an embodiment of the present invention, the integrated control display unit includes the controller and the alarm. In the braking process, the piston 6 pushes the brake pad 5 to contact and rub with the brake disc 4, so that the braking purpose is achieved. The brake block 5 pulls the guide wheel 28 to rotate through the soft pulling body 27, the guide wheel 28 drives the sensor shaft 31 to rotate, so that the Hall sensor outputs different signals according to different abrasion loss, and finally, a driver is reminded to replace a friction plate in time through light and sound of the integrated control display unit 1.

It should be noted that the present invention provides a control method, which is not detailed, such as a control method of converting the output signal of the hall sensor to the wear amount (i.e. displacement) and an alarm control method, and is a known technique in the field of automation control.

To sum up, the utility model discloses disc brake block wearing and tearing monitoring sensor converts the wearing and tearing volume of brake block to the change output of signal of telecommunication through hall sensor, can feed back out the wearing and tearing situation of brake block in real time, can cooperate with on-vehicle controller and display system, and the driver and crew of being convenient for can in time pay close attention to the information of relevant brake block wearing and tearing volume to and take corresponding measure in time, improved driving safety nature. The utility model discloses the sensor easily assembles and uses, can used repeatedly many times, and is with low costs. The utility model discloses a soft tractive style design of sensor can make the sensor install in the regional outside of braking, and the high temperature that receives the friction production influences for a short time, stable performance, and is longe-lived. The utility model discloses alarm system can in time report to the police when the wearing and tearing volume surpasss the settlement scope, and fail safe nature is high. The utility model discloses the method sends alarm signal when wearing and tearing volume exceedes the settlement scope, can in time remind driver and crew to change, can effectively solve disc brake block wearing and tearing and should not discover to extreme condition, causes the brake to become invalid easily, has the problem of serious potential safety hazard. Therefore, the utility model discloses can effectively solve the problem among the prior art to there are very high use value and use meaning.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. The present invention can be modified in many ways without departing from the spirit and scope of the present invention, and those skilled in the art can modify or change the embodiments described above without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A disc brake pad wear monitoring sensor, comprising:

a multi-stage magnet coaxially mounted at an end of the sensor shaft;

2. The disc brake pad wear monitoring sensor of claim 1, wherein the soft puller has a brake pad attachment portion at an end outside the housing for detachable attachment to a brake pad steel backing.

3. The disc brake pad wear monitoring sensor of claim 2, wherein the brake pad attachment portion includes: the shaft body, the stop body and the elastic tightening body; one end of the shaft body is provided with a stop table, and the other end of the shaft body penetrates through a mounting hole in the steel back to be connected with the stop body; the elastic stretching body is sleeved on the shaft body, two ends of the elastic stretching body are respectively pressed and abutted against the stop table and the steel back of the brake pad, and the soft traction body is connected with the shaft body.

4. A disc brake pad wear monitoring sensor according to claim 3, wherein a snap groove is provided on the shaft body, and the stop body comprises an elastic collar that snaps into the snap groove.

5. A disc brake pad wear monitoring sensor according to claim 1, wherein the multi-stage magnet is mounted on the sensor shaft by an expansion sleeve.

6. The disc brake pad wear monitoring sensor of claim 1, wherein the semiconductor sensor comprises a hall sensor.

7. A disc brake pad wear monitoring sensor according to claim 1, wherein the circumferential return body includes a torsion spring.

8. A disc brake pad wear monitoring sensor according to claim 1, wherein the housing is provided with removable end caps on both sides in the direction of extension of the sensor axis; the semiconductor sensor is arranged on one of the end covers, and one end of the sensor shaft, which is far away from the semiconductor sensor, is rotatably arranged on the other end cover.

9. The utility model provides a disc brake block alarm system, disc brake block compresses tightly the braking to the brake disc along the linear direction on, its characterized in that, disc brake block alarm system includes: the disc brake pad wear monitoring device comprises a controller, an alarm and the disc brake pad wear monitoring sensor according to any one of claims 1 to 8, wherein the end part of a soft traction body positioned outside a shell is connected with a disc brake pad, a power line of a semiconductor sensor is electrically connected with a power supply device, a signal line of the semiconductor sensor is electrically connected with the controller, and the controller is electrically connected with the alarm.

10. The disc brake pad alarm system of claim 9, wherein a through hole is formed in a caliper of the disc brake pad, and a guide post that is guided in cooperation with the through hole is formed at an end of the soft pulling body and moves along the through hole during braking.