阅读说明：本技术 一种用于半挂车鼓式制动器的衬片磨损报警装置 (Lining wear alarm device for semitrailer drum brake ) 是由 吴志宏 孙亮 雷宜专 于 2019-12-10 设计创作，主要内容包括：本发明公开了一种用于半挂车鼓式制动器的衬片磨损报警装置,包括报警灯组件、刹车蹄片和设置在刹车蹄片上的磨损传感器；报警灯组件包括LED灯,LED灯内连接控制开关,控制开关为常闭式继电器,常闭式继电器连接常电接口和外部控制接口,外部控制接口断开LED灯亮,外部控制接口连通LED灯灭；常电接口连接取电线,取电线连接电源,外部控制接口连接控制连接线,控制连接线连接4根或6根传感器连接线,传感器连接线串联,传感器连接线连接磨损传感器,刹车蹄片上连接刹车片,磨损传感器与刹车蹄片和刹车片可拆卸连接。通过上述设置,该报警装置的应用能提高车辆行驶安全,及时报警提示更换制动衬片,降低人工管理的难度,车辆行驶更加安全。(The invention discloses a lining wear alarm device for a semitrailer drum brake, which comprises an alarm lamp assembly, a brake shoe and a wear sensor arranged on the brake shoe, wherein the alarm lamp assembly comprises a lamp body, a brake shoe and a wear sensor; the alarm lamp assembly comprises an LED lamp, a control switch is connected in the LED lamp, the control switch is a normally closed relay, the normally closed relay is connected with a normally electric interface and an external control interface, the external control interface is disconnected from the LED lamp and is on, and the external control interface is communicated with the LED lamp and is off; the normal electric interface connection gets the electric wire, gets electric wire connection power, and external control interface connection control connecting wire, 4 or 6 sensor connecting wires are connected to the control connecting wire, and the sensor connecting wire is established ties, and the sensor connecting wire connects wear sensor, connects the brake block on the brake shoe, and wear sensor can dismantle with brake shoe and brake block and be connected. Through the arrangement, the alarm device can improve the running safety of the vehicle, timely gives an alarm to prompt the replacement of the brake lining, reduces the difficulty of manual management, and ensures that the vehicle runs more safely.)

1. A lining wear warning device for a semitrailer drum brake is characterized in that: comprises an alarm lamp component (1), a brake shoe (2) and a wear sensor (8) arranged on the brake shoe (2);

the alarm lamp assembly (1) comprises an LED lamp (101), a control switch (102) is connected in the LED lamp (101), the control switch (102) is a normally closed relay, and the normally closed relay is connected with a normally electric interface (103) and an external control interface (104);

when the external control interface (104) is disconnected, the LED lamp (101) is turned on; when the external control interface (104) is communicated, the LED lamp (101) is turned off;

the utility model discloses a brake shoe, including normal electricity interface (103), get electric wire (3), it is connected with power (4) to get electric wire (3), external control interface (104) are connected with control connection line (5), control connection line (5) are connected with 4 or 6 sensor connecting wire (6), be the series relation between sensor connecting wire (6), sensor connecting wire (6) are connected with wear sensor (8), be connected with brake block (7) on brake shoe (2), wear sensor (8) with brake shoe (2) with brake block (7) can dismantle the connection.

2. A lining wear warning device for a semitrailer drum brake, according to claim 1, characterised in that: the power supply (4) is an ISO7638 trailer braking and travelling mechanism wiring harness.

3. A lining wear warning device for a semitrailer drum brake, according to claim 2, characterised in that: be provided with threaded rod (801) and annular card platform (802) on wear sensor (8), brake shoe (2) are provided with connecting hole (803), place on brake block (7) mounting hole (804) of wear sensor (8), threaded rod (801) are connected with bolt (805), wear sensor (8) pass through annular card platform (802) with bolt (805) are fixed on connecting hole (803) with in mounting hole (804).

4. A lining wear warning device for a semitrailer drum brake, according to claim 3, characterised in that: and a check washer (806) is arranged between the bolt (805) and the brake shoe (2).

5. A lining wear warning device for a semitrailer drum brake, according to claim 4, characterized in that: two conducting wires (807) are arranged in the wear sensor (8), a wear part (808) is arranged at the top end of the wear sensor (8), the two conducting wires (807) are connected in the wear part (808), and the two conducting wires (807) are disconnected after the wear part (808) is worn.

6. A lining wear warning device for a semitrailer drum brake, according to claim 5, characterized in that: an accommodating cavity (809) for accommodating impurities abraded by the abrasion part (808) is arranged in the abrasion part (808).

Technical Field

The invention relates to the field of automobile accessories, in particular to a lining wear alarm device for a semitrailer drum brake.

Background

Drum brakes, also called block brakes, are used to brake by pressing brake blocks against brake wheels. Drum brakes are early designs of brake systems, and the design of the brake drum is already used on a carriage in 1902 years, and the brake drum is not started to be widely applied in the automobile industry until about 1920 years. The main stream of the drum brake is of an inward-expanding type, and a brake block (brake shoe) of the drum brake is positioned on the inner side of a brake wheel, and the brake block is expanded outwards to rub the inner side of the brake wheel during braking, so that the purpose of braking is achieved.

With the development of the automobile industry, the automobile performance is better and better, the safety and stability of a brake system are more and more emphasized by designers and drivers, the main part influencing the performance of the brake system is a brake pad, a friction pad on the brake pad belongs to a wear part and needs to be replaced periodically, if the friction pad is replaced irregularly, a brake hub directly contacts with a brake lining, the service life of the automobile is influenced, the braking function is lost, and serious traffic casualty accidents are caused.

When lining replacement of brakes of a towing vehicle and a trailer is required according to the safety technical conditions of transport industry standard JT/T1178.2-2019 commercial trucks, an acoustic or optical alarm device is adopted to give an alarm to a driver, and the alarm device conforms to the regulation of GB 12676. Because the operating mode of semitrailer is abominable, the driver is rare to inspect the remaining thickness of brake lining on time, takes place occasionally when leading to the condition of the facing wearing and tearing of stopper, and the urgent instant brake is malfunctioning, causes major incident, and the transportation industry promotes the vehicle safety of traveling through the industry regulation.

The existing alarm device is mainly characterized in that an alarm sheet is fixedly installed on a brake lining along the thickness direction of a friction lining block, when the friction lining block is seriously abraded, a brake hub can be contacted with the alarm sheet, so that harsh metal friction sound is emitted to warn a driver to replace the brake sheet, but the alarm device can cause great damage to the brake hub, and even if the metal friction sound is emitted, the driver sitting in a cab can not necessarily be warned due to the influence of external noise.

Disclosure of Invention

The invention aims to provide a lining wear alarm device for a drum brake of a semitrailer, which can improve the running safety of a vehicle, give an alarm in time to prompt the replacement of a brake lining, reduce the difficulty of manual management and ensure that the vehicle runs more safely.

In order to achieve the purpose, the invention provides the following technical scheme: a lining wear alarm device for a semitrailer drum brake comprises an alarm lamp assembly, a brake shoe and a wear sensor arranged on the brake shoe;

the alarm lamp assembly comprises an LED lamp, a control switch is connected in the LED lamp, the control switch is a normally closed relay, and the normally closed relay is connected with a normally electric interface and an external control interface;

when the external control interface is used, the LED lamp is turned on after being turned off; when the external control interface is communicated, the LED lamp is turned off;

the utility model discloses a brake shoe, including the brake shoe, the normal electric interface connection has gets the electric wire, get the electric wire and be connected with the power, external control interface connection has the control connecting wire, the control connecting wire is connected with 4 or 6 sensor connecting wires, the sensor connecting wire is the series relation between the line, the sensor connecting wire is connected with the wear sensor, be connected with the brake block on the brake shoe, the wear sensor with the brake shoe with the connection can be dismantled to the brake block.

According to the technical scheme, when the brake pad is seriously worn, the alarm is given out through the LED lamp, meanwhile, the abrasion sensor is also worn to cause circuit break, and the abrasion sensor is connected with the control switch, namely the normally closed relay, so that the LED lamp is in a communicated state, and the LED lamp is on, thereby playing the role of giving an alarm to a driver; simultaneously because a plurality of wear sensors that are located a plurality of brake pads are connected in series each other and are connected with the alarm lamp subassembly, consequently there is brake pad wearing and tearing in a department serious, just can send alarm signal, therefore this alarm device can detect the wearing and tearing condition of each brake pad to remind driver and maintenance, maintainer, guarantee driver's driving safety.

Preferably, the power source is an ISO7638 trailer brake and running gear wiring harness.

Through the technical scheme, the alarm device can utilize the existing power supply on the trailer to provide electric quantity, and does not need extra batteries or other power supply devices, so that the alarm device has strong later-stage refitting performance, is convenient for installing the alarm device on the existing trailer, and reduces the installation cost and the difficulty.

Preferably, a threaded rod and an annular clamping table are arranged on the wear sensor, a connecting hole is formed in the brake shoe, the mounting hole of the wear sensor is placed on the brake shoe, the threaded rod is connected with a bolt, and the wear sensor is fixed on the connecting hole and in the mounting hole through the annular clamping table and the bolt.

Through above-mentioned technical scheme, through bolt and annular ka tai, can be convenient install wear sensor on the brake shoe, wear sensor also is located the mounting hole this moment, and at the initial condition of brake shoe, the brake shoe is higher than wear sensor's top, and when the brake shoe worn and torn extreme position, wear sensor was worn and torn the disconnection, and then sends alarm signal to the alarm lamp subassembly.

Preferably, a locking gasket is arranged between the bolt and the brake shoe.

Through above-mentioned technical scheme, the setting up of locking gasket can play locking effect to the bolt, prevents to cause the not hard up of bolt because the vibration.

Preferably, set up two wires in the wear sensor, the top of wear sensor is provided with wearing and tearing portion, two in the wearing and tearing portion the wire is connected, wear and tear back two the wire disconnection.

Through the technical scheme, the connecting part of the two leads is arranged in the wearing part, so that after the wearing part is worn, the connecting part of the two leads is synchronously worn, the two leads are relatively disconnected, and an alarm signal is sent out.

Preferably, the wearing part is internally provided with a containing cavity for containing impurities worn by the wearing part.

Through above-mentioned technical scheme, after wearing and tearing portion is worn and torn, because the corresponding impurity that wearing and tearing portion wearing and tearing produced can be preferred to enter into and hold the chamber, consequently can prevent that impurity flies out, influences the normal work of other parts or causes harmful effects to the environment.

Compared with the prior art, the invention has the beneficial effects that:

(1) because the abrasion sensors on the brake pads are connected in series and connected with the alarm lamp component, an alarm signal can be sent out when one brake pad is seriously abraded, and therefore, the alarm device can detect the abrasion condition of each brake pad, remind a driver and maintenance personnel and guarantee the driving safety of the driver;

(2) the alarm device has a simple structure, can be powered by a power supply on the existing trailer, has strong operability, can be conveniently installed, and has the advantages of low cost and low difficulty;

(3) the control switch is arranged in the LED lamp, the alarm device is simple and reliable in whole structure, the thickness of the drum brake lining of the semitrailer can be monitored with the lowest cost, the trouble that a driver manually checks the thickness of the brake lining is eliminated, the running safety of a vehicle is improved, the problem that the drum brake lining is not timely replaced can be fundamentally solved, the applicability is strong, the safety and the reliability are high, the application prospect is wide, and remarkable economic benefits and social values can be brought.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a first schematic view of a wear sensor mounting of the present invention;

FIG. 3 is a second schematic view of a wear sensor mounting of the present invention;

FIG. 4 is a schematic diagram of the switch of the alarm lamp assembly structure of the present invention;

FIG. 5 is a schematic view of the exterior configuration of the warning light assembly of the present invention;

fig. 6 is a schematic view of the internal structure of the wear sensor of the present invention.

In the figure: 1. an alarm light assembly; 101. an LED lamp; 102. a control switch; 103. a normal electric interface; 104. an external control interface; 2. a brake shoe; 3. taking a wire; 4. a power source; 5. a control connection line; 6. a sensor connecting wire; 7. a brake pad; 8. a wear sensor; 801. a threaded rod; 802. an annular clamping table; 803. connecting holes; 804. mounting holes; 805. a bolt; 806. a lock washer; 807. a wire; 808. a wear portion; 809. a receiving cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, an embodiment of the present invention is shown:

a lining wear alarm device for a semitrailer drum brake comprises an alarm lamp assembly 1, a brake shoe 2 and a wear sensor 8 arranged on the brake shoe 2;

alarm lamp subassembly 1 includes LED lamp 101, is connected with control switch 102 in the LED lamp 101, and control switch 102 is the normal close formula relay, and the normal close formula relay is connected with normal electric interface 103 and external control interface 104. When the external control interface 104 is disconnected, the LED lamp 101 is on, and when the external control interface 104 is connected, the LED lamp 101 is off;

the normal electricity interface 103 is connected with gets electric wire 3, gets electric wire 3 and is connected with power 4, and external control interface 104 is connected with control connecting wire 5, and control connecting wire 5 is connected with 4 or 6 sensor connecting wires 6, is the series relation between sensor connecting wire 6, and sensor connecting wire 6 is connected with wear sensor 8, is connected with brake block 7 on the brake shoe 2, and wear sensor 8 can dismantle with brake shoe 2 and brake block 7 and be connected.

When the brake pad 7 is seriously worn, the alarm needs to be given through the LED lamp 101, meanwhile, the abrasion sensor 8 is also worn to cause the disconnection, because the abrasion sensor 8 is connected with the control switch 102, namely a normally closed relay, the LED lamp 101 is in a connected state, and the LED lamp 101 is on, thereby playing the role of giving an alarm to a driver; simultaneously because a plurality of wear sensors 8 that are located on a plurality of brake blocks 7 are connected in series each other and are connected with alarm lamp subassembly 1, consequently there is brake block 7 wearing and tearing of a department serious, just can send alarm signal, therefore this alarm device can detect each brake block 7's the wearing and tearing condition to remind driver and maintenance, maintainer, guarantee driver's driving safety.

The power source 4 is the ISO7638 trailer brake and running gear harness. This alarm device can utilize current power 4 on the trailer to provide the electric quantity, need not extra battery or other power 4 devices of providing for the device has very strong later stage repacking nature, is convenient for install the device to current trailer, reduces installation cost and the degree of difficulty.

The wear sensor 8 is provided with a threaded rod 801 and an annular clamping table 802, the brake shoe 2 is provided with a connecting hole 803, the brake shoe 7 is provided with a mounting hole 804 for placing the wear sensor 8, the threaded rod 801 is connected with a bolt 805, and the wear sensor 8 is fixed on the connecting hole 803 and in the mounting hole 804 through the annular clamping table 802 and the bolt 805.

Through bolt 805 and annular ka tai 802, can be convenient install wear sensor 8 on brake shoe 2, wear sensor 8 also is located mounting hole 804 this moment, and at brake block 7's initial condition, brake block 7 is higher than wear sensor 8's top, and when brake block 7 worn out to extreme position, wear sensor 8 was worn out the disconnection, and then sends alarm signal to alarm lamp subassembly 1.

A locking washer 806 is provided between the bolt 805 and the brake shoe 2. The anti-loosening gasket 806 can prevent the bolt 805 from loosening due to vibration.

Two wires 807 are provided in the wear sensor 8, a wear portion 808 is provided at the tip end of the wear sensor 8, the two wires 807 are connected in the wear portion 808, and the two wires 807 are disconnected after the wear portion 808 is worn. Since the connection point of the two wires 807 exists inside the wear part 808, after the wear part 808 is worn, the connection point of the two wires 807 is also worn synchronously, so that the two wires 807 are disconnected relatively, and an alarm signal is sent out.

An accommodating cavity 809 for accommodating impurities abraded by the abrasion part 808 is arranged in the abrasion part 808. After the wear part 808 is worn, impurities generated by the wear of the wear part 808 can preferentially enter the accommodating cavity 809, so that the impurities can be prevented from flying out to influence the normal operation of other parts or cause adverse effects on the environment.

In conclusion, the beneficial effects of the invention are as follows: (1) because the abrasion sensors 8 positioned on the brake pads 7 are connected in series and connected with the alarm lamp component 1, an alarm signal can be sent out when one brake pad 7 is seriously abraded, and therefore, the alarm device can detect the abrasion condition of each brake pad 7, remind a driver and maintenance personnel and guarantee the driving safety of the driver; (2) the alarm device has a simple structure, can be powered by the power supply 4 on the existing trailer, has strong operability, can be conveniently installed, and has the advantages of low cost and low difficulty; (3) the control switch 102 is arranged in the LED lamp 101, the whole alarm device is simple and reliable in structure, the thickness of the drum brake lining of the semi-trailer can be monitored with the lowest cost, the trouble that a driver manually checks the thickness of the brake lining is omitted, the driving safety of a vehicle is improved, the problem that the drum brake lining is not replaced timely can be fundamentally solved, the applicability is strong, the safety and the reliability are high, the application prospect is wide, and remarkable economic benefits and social values can be brought.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.