Friction block wear sensor and friction block loss alarm system based on strain signal

Abstract

The utility model discloses a friction block wear sensor and a friction block loss alarm system based on a strain signal, and relates to the technical field of real-time monitoring alarm, the friction block wear sensor comprises a friction block main body, and the side surface of the friction block main body is fixedly provided with a friction block wear sensor body. According to the friction block wear sensor and the friction block loss alarm system based on the strain signal, the strain sensor is attached to the induction beam in the friction block wear sensor body, one end of the induction beam is fixed, the other end of the induction beam is connected with a movable part, and the friction block wear sensor body is installed on the side face of the friction block body and fixed. When the friction block main body is worn to a certain degree, the surface of the friction block main body rotating piece contacts with the rigid part of the friction block wear sensor body, so that the rigid part displaces, the sensing beam is slightly bent, the bending can be monitored through strain change, and the purpose of friction block loss alarm is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of real-time monitoring and alarming, in particular to a friction block wear sensor and a friction block wear alarm system based on strain signals. Background Art

[0002] In the braking system, the friction block is usually used to dissipate the kinetic energy of the rotating part by friction contact with the plane, which will cause wear and tear on the friction block during the braking process. Over time, the thickness of the friction block will slowly decrease. When it is reduced to a certain thickness, its braking performance will also decrease, thus affecting the performance of the entire braking system and its safety.

[0003] The friction block alarm system in a conventional brake system generally uses three methods: inspection, sound judgment, and electric circuit. Among them, the inspection method is a method of long-term monitoring through manual inspection or camera. This method is time-consuming and labor-intensive, and is extremely difficult to operate in a small environment. Sound judgment is to install a paddle at the limit point of friction block wear. When the wear reaches a certain limit, the friction paddle makes a sharp sound to judge. This method requires manual waiting. The electric circuit method is currently the most commonly used method. Its principle is to use the on-off of the electric circuit to judge. Usually, an electric circuit probe is installed on the side of the friction block, and the friction electric circuit probe is used to form or cut off the electric circuit. However, this method requires the conductivity of the braked part, and it will also power on the entire brake system.

[0004] Therefore, it is urgent to improve this shortcoming. The utility model studies and improves the existing structure and shortcomings, and provides a friction block wear sensor and a friction block wear alarm system based on strain signals. Utility Model Content

[0005] The utility model aims to provide a friction block wear sensor and a friction block wear alarm system based on strain signals, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] On the one hand, the utility model provides a friction block wear sensor, including a friction block body, a friction block wear sensor body is fixedly installed on the side of the friction block body, and the friction block wear sensor body includes a base, a sensing beam, a mounting aid, a fixing screw and a strain gauge, the outer surface of the base is connected to the sensing beam, and one side of the sensing beam is in contact with the base, and the other side of the sensing beam is provided with a mounting aid, and one side of the mounting aid is connected with a fixing screw, the strain gauge is installed in the middle position of the sensing beam, and a strain sensor is arranged on the wall of the sensing beam.

[0008] Furthermore, the sensing beam includes a beam body, a mounting hole and a groove, and the mounting hole is opened on one side of the beam body, and the groove is milled on the same side of the beam body.

[0009] Furthermore, one end of the fixing screw passes through the mounting auxiliary component and the sensing beam in sequence and is threadedly connected to the base, and the fixing screw passes through the beam body through the mounting hole.

[0010] Furthermore, one end of the sensing beam is fixed by a fixing screw, and the other end of the sensing beam is connected to the movable component.

[0011] Furthermore, the strain gauge includes a substrate, a deep groove and a full-bridge resistor bridge, and the deep grooves are equidistantly milled on the upper and lower sides of the substrate, and the full-bridge resistor bridge is arranged on one side of the substrate.

[0012] Furthermore, the strain gauge also includes an adhesive and a silicone cover sheet, and the adhesive is evenly coated on one side of the substrate, and the substrate is adhered to the silicone cover sheet through the adhesive.

[0013] Furthermore, the silicone cover and the full-bridge resistor bridge are arranged on the same side of the substrate, and the shape and size of the substrate match the shape and size of the silicone cover, and the full-bridge resistor bridge is located between the silicone cover and the substrate.

[0014] On the other hand, the utility model provides a friction pad wear alarm system based on strain signals, and the friction pad wear alarm system based on strain signals is installed with the friction pad wear sensor as described above.

[0015] The utility model provides a friction block wear sensor and a friction block wear alarm system based on strain signals, which have the following beneficial effects:

[0016] 1. The utility model attaches the strain sensor to the inductive beam inside the friction block wear sensor body, one end of the inductive beam is fixed, and the other end is connected to the movable part, and the friction block wear sensor body is installed on the side of the friction block body and fixed. When the friction block body is worn to a certain extent, the surface of the rotating part of the friction block body will contact the rigid part of the friction block wear sensor body, causing the rigid part to displace, thereby causing a slight bending of the inductive beam. The bending can be monitored by strain changes, thereby achieving the purpose of friction block wear alarm.

[0017] 2. The utility model designs the sensing beam by pasting a strain gauge after milling a depth of 1.5 mm in the middle of the sensing beam. A full-bridge resistance bridge is mounted on the strain gauge, and a silicone cover is adhered with an adhesive for protection. Evenly distributed deep grooves are milled on both sides of the substrate, so that the stress of the sensing beam is concentrated in the strain gauge area after deformation, effectively improving the use effect of the sensing beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the connection structure of a friction block body and a friction block wear sensor of a friction block wear sensor of the utility model;

[0019] Figure 2 This is an appearance diagram of a friction block wear sensor of the utility model;

[0020] Figure 3 This is an appearance diagram of a sensing beam of a friction block wear sensor of the utility model;

[0021] Figure 4 This is an appearance diagram of a strain gauge of a friction block wear sensor of the utility model;

[0022] Figure 5 This is a schematic diagram of the connection structure of a substrate-full-bridge resistor bridge of a friction block wear sensor of the utility model;

[0023] Figure 6 This is a diagram showing changes in the sensing beam of a friction block wear sensor according to the utility model.

[0024] In the figure: 1. friction block body; 2. friction block wear sensor body; 21. base; 22. sensing beam; 221. beam body; 222. mounting hole; 223. groove; 23. mounting accessories; 24. fixing screws; 25. strain gauge; 251. substrate; 252. deep groove; 253. full-bridge resistance bridge; 254. adhesive; 255. silicone cover. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0026] like Figure 1-Figure 6As shown, a friction block wear sensor comprises a friction block body 1, a friction block wear sensor body 2 is fixedly mounted on the side of the friction block body 1, and the friction block wear sensor body 2 comprises a base 21, a sensing beam 22, a mounting accessory 23, a fixing screw 24 and a strain gauge 25, the outer surface of the base 21 is connected with the sensing beam 22, and one side of the sensing beam 22 is fitted with the base 21, and the other side of the sensing beam 22 is provided with a mounting accessory 23, and one side of the mounting accessory 23 is connected with a fixing screw 24, the sensing beam 22 comprises a beam body 221, a mounting hole 222 and a groove 223, and one side of the beam body 221 is provided with a mounting hole 222, and the same side of the beam body 221 is milled with a groove 223, one end of the fixing screw 24 passes through the mounting accessory 23 and the sensing beam 22 in sequence and is threadedly connected to the base 21, and the fixing screw 24 passes through the beam body 221 through the mounting hole 222, One end of the sensing beam 22 is fixed by a fixing screw 24, and the other end of the sensing beam 22 is connected to the movable part, the strain gauge 25 is installed in the middle position of the sensing beam 22, and a strain sensor is arranged on the wall of the sensing beam 22, the strain gauge 25 includes a substrate 251, a deep groove 252 and a full-bridge resistance bridge 253, and the deep grooves 252 are equidistantly milled on the upper and lower sides of the substrate 251, and a full-bridge resistance bridge 253 is arranged on one side of the substrate 251, the strain gauge 25 also includes an adhesive 254 and a silicone cover sheet 255, and the adhesive 254 is evenly coated on one side of the substrate 251, and the substrate 251 is adhered with the silicone cover sheet 255 through the adhesive 254, the silicone cover sheet 255 and the full-bridge resistance bridge 253 are arranged on the same side of the substrate 251, and the shape and size of the substrate 251 match the shape and size of the silicone cover sheet 255, and the full-bridge resistance bridge 253 is located between the silicone cover sheet 255 and the substrate 251;

[0027] A friction block wear alarm system based on strain signals is provided. The friction block wear alarm system based on strain signals is equipped with the friction block wear sensor as described above. The system senses and measures the degree of wear of the friction block in real time through the friction block wear sensor.

[0028] In summary, according to Figure 1-Figure 6 As shown in , the working principle of the friction block wear sensor and the friction block wear alarm system based on strain signals is as follows: the strain sensor is attached to the sensing beam 22 inside the friction block wear sensor body 2, one end of the sensing beam 22 is fixed, and the other end is connected to the movable part, and the friction block wear sensor body 2 is installed on the side of the friction block body 1 and fixed. When the friction block body 1 is worn to a certain extent, the surface of the rotating part of the friction block body 1 will contact the rigid part of the friction block wear sensor body 2, causing the rigid part to displace, thereby causing the sensing beam 22 to be slightly bent. At this time, the change of the sensing beam 22 is as shown in FIG. Figure 6As shown, the bending can be monitored by strain changes to achieve the purpose of friction block loss alarm. In addition, regarding the design of the sensing beam 22, the middle of the sensing beam 22 is milled 1.5 mm deep, and a strain gauge 25 is attached in the middle. The strain gauge 25 is equipped with a full-bridge resistor bridge 253, and a silicone cover sheet 255 is adhered to the adhesive 254 for glue protection. At the same time, in order to concentrate the stress of the sensing beam 22 in the strain gauge 25 area after deformation, evenly distributed deep grooves 252 are milled on both sides of the substrate 251.

[0029] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A friction pad wear sensor, comprising a friction pad body (1), characterized in that: A friction block wear sensor body (2) is fixedly mounted on the side of the friction block body (1), and the friction block wear sensor body (2) comprises a base (21), a sensing beam (22), a mounting auxiliary component (23), a fixing screw (24) and a strain gauge (25); the outer surface of the base (21) is connected to the sensing beam (22), and one side of the sensing beam (22) is in contact with the base (21); the other side of the sensing beam (22) is provided with a mounting auxiliary component (23), and one side of the mounting auxiliary component (23) is connected with a fixing screw (24); the strain gauge (25) is mounted in the middle of the sensing beam (22), and a strain sensor is arranged on the wall of the sensing beam (22).

2. A friction pad wear sensor according to claim 1, characterized in that: The sensing beam (22) comprises a beam body (221), a mounting hole (222) and a groove (223), wherein the mounting hole (222) is opened on one side of the beam body (221), and the groove (223) is milled on the same side of the beam body (221).

3. A friction pad wear sensor according to claim 2, characterized in that: One end of the fixing screw (24) passes through the mounting auxiliary component (23) and the sensing beam (22) in sequence and is threadedly connected to the base (21), and the fixing screw (24) passes through the beam body (221) through the mounting hole (222).

4. A friction pad wear sensor according to claim 1, characterized in that: One end of the sensing beam (22) is fixed by a fixing screw (24), and the other end of the sensing beam (22) is connected to the movable component.

5. The friction pad wear sensor according to claim 1, characterized in that: The strain gauge (25) comprises a substrate (251), a deep groove (252) and a full-bridge resistance bridge (253), wherein the deep grooves (252) are milled at equal intervals on the upper and lower sides of the substrate (251), and the full-bridge resistance bridge (253) is arranged on one side of the substrate (251).

6. A friction pad wear sensor according to claim 5, characterized in that: The strain gauge (25) further comprises an adhesive (254) and a silicone cover sheet (255), wherein the adhesive (254) is evenly coated on one side of the substrate (251), and the substrate (251) is adhered to the silicone cover sheet (255) via the adhesive (254).

7. A friction pad wear sensor according to claim 6, characterized in that: The silicone cover sheet (255) and the full-bridge resistance bridge (253) are arranged on the same side of the substrate (251), and the shape and size of the substrate (251) and the shape and size of the silicone cover sheet (255) match each other, and the full-bridge resistance bridge (253) is located between the silicone cover sheet (255) and the substrate (251).

8. A friction block wear alarm system based on strain signals, characterized in that: The friction pad wear alarm system based on strain signals is equipped with a friction pad wear sensor as described in any one of claims 1-7.

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