Brake disc wear measurement component and method for EMU

Abstract

The present invention relates to the technical field of brake disc wear measurement, specifically to a brake disc wear measurement component and method for EMUs, comprising a handle, a side plate, a fixed seat, a measuring rod and a first ball, wherein the two side plates are fixedly mounted on the left side of the handle, and the two fixed seats are respectively fixedly mounted on the sides of the two side plates that are away from each other, and a first rectangular seat is rotatably mounted on the outer side of the fixed seat, and a slide groove is provided on the top and bottom of the first rectangular seat, and a round rod is slidably mounted on the inner side of the slide groove. The present invention can directly measure the wear of the brake disc, with a small measurement error, and can simultaneously measure the wear on both sides of the brake disc, thereby improving the measurement efficiency. When the wear on both sides of the brake disc is different, the difference between the wear on both sides can be obtained in time, and deviation is not easy to occur, thereby reducing the parameter difference between the wear on both sides and improving the measurement accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of brake disc wear measurement, and in particular to a brake disc wear measurement component and method for a motor vehicle multiple unit. Background Art

[0002] The wheel set is one of the most important parts in the EMU bogie structure, and the eccentric wear of the brake disc (i.e. wheel disc) on the wheel set is an important factor to ensure that the vehicle can brake stably on the rails. In order to reduce the train speed from a very high speed to a low speed or stop, an efficient basic braking device is required. The use of brake disc braking is to use the friction between the brake disc and the brake pad to convert the kinetic energy into heat energy for consumption. The braking is efficient and will not damage the tread of the wheel set. However, if the eccentric wear of the brake disc is too large, it will affect the interaction force between the brake disc and the brake pad during braking, resulting in uneven force between the brake disc and the brake pad, thereby affecting the braking of the EMU. Therefore, when the EMU is overhauled, the wear of the brake disc needs to be measured.

[0003] However, the detection area for the brake disc is limited. Currently, there is no special measuring tool for measuring the wear of the brake disc. The commonly used measurement method is to use a steel ruler for positioning and a feeler gauge for auxiliary measurement. This method cannot directly measure the wear of the brake disc and has a large measurement error. At the same time, it is impossible to measure the wear of both sides of the brake disc at the same time. Only the wear of one side of the brake disc can be measured, which reduces the measurement efficiency.

[0004] At the same time, when the brake pads are in contact with the brake disc and the train is slowed down from a very high speed to a low speed or stopped by friction, there will always be a certain range of difference in the distance between the two brake pads and the two sides of the brake disc, which makes the wear on both sides of the brake disc different when the brake pads are working. The difference between the wear on both sides cannot be obtained in time, and the wear on one side of the brake disc needs to be measured, and then the comparative calculation operation is performed. It is cumbersome and easy to produce intermediate errors, which affects the measurement accuracy to a certain extent. For this reason, we propose a brake disc wear measurement component and method for EMUs to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a component and method for measuring the wear of brake discs of EMUs to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a brake disc wear measurement component for a motor vehicle, comprising a handle, a side plate, a fixed seat, a measuring rod and a first ball, the two side plates are fixedly installed on the left side of the handle, the two fixed seats are respectively fixedly installed on the side of the two side plates away from each other, a first rectangular seat is rotatably installed on the outer side of the fixed seat, a slide groove is provided on the top and the bottom of the first rectangular seat, a round rod is slidably installed on the inner side of the slide groove, and the same U-shaped block is rotatably installed on the outer side of the corresponding two round rods, the two measuring rods are respectively fixedly installed on the side of the two U-shaped blocks close to each other, the side plate is slidably sleeved on the outer side of the corresponding measuring rod, the first ball is embedded in the end of the corresponding measuring rod, the end of the measuring rod and the center of the brake disc body are on the same horizontal line, the outer fixed sleeve of the measuring rod is provided with a circular block, and a first spring in a compressed state is fixedly connected between the circular block and the corresponding side plate;

[0007] The two side panels are fixedly connected to a support plate on the sides away from each other, and a T-shaped slide rail is fixedly connected to the left side of the support plate. A slider is slidably installed on the outer side of the T-shaped slide rail, and a second rectangular seat is rotatably installed on the outer side of the slider. Two first positioning rods are fixedly connected to the right side of the first rectangular seat, and the second rectangular seat is slidably sleeved on the outer sides of the corresponding two first positioning rods. The rotation point of the first rectangular seat, the center of the round rod and the rotation point of the second rectangular seat are located on the same straight line.

[0008] Further preferably, the measuring assembly includes an angle measuring mechanism, which includes an angle measuring disk, an annular block and a pointer rod, wherein the angle measuring disk is arranged between two side plates, two fixing rods are fixedly installed on the inner side of the angle measuring disk, the annular block is fixedly installed between the two fixing rods, the center of the annular block coincides with the center of the angle measuring disk, and a winding shaft is rotatably installed on the top and bottom of the annular block through two bearings respectively.

[0009] Further preferably, the outer fixed sleeve of the winding shaft is provided with a limit plate, the pointer rod is fixedly installed with the outer side of the corresponding limit plate, a first flexible steel rope is wound and fixed around the outer side of the winding shaft, two triangular blocks are fixedly connected to the sides of the two support plates away from each other, and a first fixed pulley is rotatably installed between the sides of the two corresponding triangular blocks close to each other.

[0010] Further preferably, the end of the first flexible steel rope is passed around the outer side of the corresponding first fixed pulley and is fixedly connected to the side of the slider away from the side plate, and the side plate is slidably sleeved on the outer side of the corresponding first flexible steel rope.

[0011] Further preferably, the measuring assembly includes a locking mechanism, which includes a U-shaped rod, a rectangular rod, an arc block and a square rod. The U-shaped rod is fixedly installed between the angle measuring disk and the handle, and two grip blocks are slidably installed on the outer side of the U-shaped rod. The top of the grip block is provided with a first arc hole with an opening on the left side, and a cavity is provided on the handle. The rectangular rod is fixedly installed on the right side of the grip block, and the right end of the rectangular rod extends into the cavity, and the handle is slidably sleeved on the outer side of the two rectangular rods.

[0012] Further preferably, the two rectangular rods are provided with grooves with an opening on the right side on the sides where the two rectangular rods are close to each other, and the two arc blocks are respectively fixedly installed on the inner walls on the sides where the two grooves are away from each other. Two fixed blocks are fixedly connected to the left inner wall of the cavity, and a second positioning rod is fixedly connected between the two fixed blocks. Two pinching blocks are provided on the outer sliding sleeve of the second positioning rod, and a rectangular hole is provided on the right inner wall of the cavity. The right side of the pinching block passes through the rectangular hole and extends outside the handle, and a second arc hole is provided on the top of the pinching block.

[0013] Further preferably, the two pinching blocks are fixedly connected with a same second spring movably sleeved on the outside of the second positioning rod, and the two pinching blocks are fixedly connected with a square rod on the side away from each other, and the end of the square rod is embedded with a second ball, and the square rod is slidably installed between the arc block and the corresponding groove, and the second ball cooperates with the corresponding arc block, and the second ball can roll on the arc surface of the arc block.

[0014] Further preferably, the top and bottom of the U-shaped rod are fixedly connected to two first limit blocks, the right side of the grip block is movably contacted with the left side of the corresponding first limit block, the left side of the grip block is fixedly connected to a second flexible steel rope, the right side of the circular block is fixedly connected to a connecting block, and the sides of the two side panels close to each other are rotatably installed with second fixed pulleys, and the end of the second flexible steel rope passes around the outer side of the corresponding second fixed pulley and is fixedly connected to the connecting block.

[0015] Further preferably, the left side of the angle measuring disc is fixedly connected to a T-shaped block, the left side of the T-shaped block is fixedly connected to an arc-shaped plate, the front and rear sides of the arc-shaped plate are fixedly connected to two second limit blocks, and when the arc-shaped plate moves to the left, its inner arc-shaped surface can fit tightly with the outer side of the brake disc body.

[0016] The present invention also proposes a method for measuring the wear of brake discs of a motor vehicle, comprising the following steps:

[0017] Step 1: Pinch the two pinching blocks 308 and move them so that the square rod 311 drives the second ball 312 to separate from the arc block 305, and the elastic force of the first spring 110 drives the measuring rod 107 to move downward through the circular block 109 to contact the wear surface of the brake disc body 7;

[0018] Step 2: The moving distance of the slider 113 can be obtained by the formula: , and through the formula The distance moved by L4 is obtained, and the wear value L4 of one side of the brake disc body 7 is obtained;

[0019] Step 3: When the two pointer rods 206 rotate with the center of the angle measuring disk 2, that is, when there is an angle difference between the two angles α1 and α2, the formula After calculation, the difference between L4 after error and L4 actually calculated can be obtained, which reduces the parameter difference between the wear amount L4 on both sides, thereby improving the measurement accuracy;

[0020] Step 4: After the measurement is completed, hold the two gripping blocks 301 and move them to the right to contact the left side of the first limit block 313, so that the measuring rod 107 is reset. At this time, the wear of other brake discs can be measured.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the present invention, the first ball is moved to the position to be measured by holding the handle, and the two pinching blocks are moved in a direction close to each other to compress the spring. The elastic force of the first spring drives the circular block to move, so that the measuring rod drives the first ball to contact the wear surface of the brake disc body, the measuring rod drives the U-shaped block to move, the circular rod drives the first rectangular seat to rotate, and the second rectangular seat drives the slider to slide on the outer side of the T-shaped slide rail;

[0023] 2. The slider moves closer to the side plate. The first flexible steel rope drives the limit plate to rotate by rotating the winding shaft. The limit plate rotates the pointer rod to rotate by an angle α. The moving distance of the slider can be obtained by the formula: , the rotation point a of the first rectangular seat, the rotation point c of the second rectangular seat, and the projection point b of the rotation point of the first rectangular seat on the T-shaped slide rail form a right triangle, which can be obtained by the formula The distance L moves (i.e. the distance the first ball moves toward the brake disc body) can be obtained, thereby obtaining the wear value L of one side of the brake disc body;

[0024] 3. When the two pointer rods rotate with the center of the angle measuring disc, it proves that there is a difference in the wear value of the two sides of the brake disc body (between the two L4). Even if there is an error in the angle reading process (for example, the actual angle is 22 degrees, but it is read as 20 degrees), the distance of L1 obtained is inconsistent with the actual distance, and there is an error. After calculation, the difference between L4 after error and L4 actually calculated can be obtained, thereby reducing the parameter difference between the wear amount L4 on both sides, thereby improving the measurement accuracy;

[0025] 4. When the measurement is completed, hold the two grips and move them to the right, so that the rectangular rod drives the arc block to move, and the second ball rolls on the arc surface of the arc block. When the second ball is offset from the arc surface of the corresponding arc block, the second spring in a compressed state is reset, and the elastic force of the second spring drives the pinching block to move, and the pinching block drives the corresponding square rod to move, and the square rod drives the corresponding ball to move between the arc block and the side wall of the groove, and the right side of the grip block contacts the left side of the first limit block, so that the measuring rod is reset, and the wear of other brake discs can be measured at this time. The present invention can directly measure the wear of the brake disc with small measurement error, and can simultaneously measure the wear on both sides of the brake disc, thereby improving the measurement efficiency. When the wear on both sides of the brake disc is different, the difference between the wear on both sides can be obtained in time, and deviation is not easy to occur, thereby reducing the parameter difference between the wear on both sides and improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0027] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0028] Figure 3 It is a schematic diagram of the top view of the structure of the present invention;

[0029] Figure 4 The overall structure of the present invention is shown in FIG. Figure 3 ;

[0030] Figure 5 The overall structure of the present invention is shown in FIG. Figure 4 ;

[0031] Figure 6 It is a schematic diagram of the three-dimensional structure after the arc plate and the brake disc body are attached in the present invention;

[0032] Figure 7 for Figure 6 A top view of

[0033] Figure 8 is a schematic diagram of the internal cross-sectional structure of the handle of the present invention;

[0034] Fig. 9 A three-dimensional diagram showing the connection of the angle measuring disk, the U-shaped rod and the curved plate in the present invention;

[0035] Fig.10 for Fig. 9 A bottom-up stereogram of

[0036] Fig.11It is a schematic diagram of the internal cross-sectional structure of the annular block in the present invention;

[0037] Fig.12 for Figure 3 A schematic diagram of the enlarged three-dimensional structure of the middle A area;

[0038] Fig.13 for Figure 5 Schematic diagram of the enlarged three-dimensional structure of area B in the middle;

[0039] Fig.14 This is a schematic diagram of the right triangle formed by the rotation point of the first rectangular seat, the second rectangular seat and the first positioning rod when measuring.

[0040] In the figure:

[0041] 1. handle; 101. side plate; 102. fixed seat; 103. first rectangular seat; 104. slide groove; 105. round rod; 106. U-shaped block; 107. measuring rod; 108. first ball; 109. round block; 110. first spring; 111. support plate; 112. T-shaped slide rail; 113. slide block; 114. second rectangular seat; 115. first positioning rod;

[0042] 2. Angle measuring plate; 201. Fixed rod; 202. Ring block; 203. Bearing; 204. Winding shaft; 205. Limiting plate; 206. Pointer rod; 207. First flexible steel rope; 208. Triangular block; 209. First fixed pulley;

[0043] 3. U-shaped rod; 301. gripping block; 302. cavity; 303. rectangular rod; 304. groove; 305. arc block; 306. fixing block; 307. second positioning rod; 308. pinching block; 309. rectangular hole; 310. second spring; 311. square rod; 312. second ball bearing; 313. first limiting block; 314. second flexible steel rope; 315. second fixed pulley; 316. connecting block;

[0044] 4. T-shaped block; 5. Arc plate; 6. Second limit block; 7. Brake disc body. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Example

[0047] See also Figure 1-14The present invention provides a technical solution: a brake disc wear measurement component for a motor vehicle, comprising a handle 1, a side plate 101, a fixing seat 102, a measuring rod 107 and a first ball 108, wherein the two side plates 101 are fixedly mounted on the left side of the handle 1, the two fixing seats 102 are respectively fixedly mounted on the sides of the two side plates 101 that are away from each other, a first rectangular seat 103 is rotatably mounted on the outer side of the fixing seat 102, a slide groove 104 is provided on the top and bottom of the first rectangular seat 103, a round rod 105 is slidably mounted on the inner side of the slide groove 104, and two corresponding round rods 105 are slidably mounted on the inner side of the slide groove 104. The outer side of the rod 105 is rotatably mounted with the same U-shaped block 106, and two measuring rods 107 are respectively fixedly mounted on the sides of the two U-shaped blocks 106 close to each other. The side plate 101 is slidably sleeved on the outer side of the corresponding measuring rod 107, and the first ball 108 is embedded in the end of the corresponding measuring rod 107. The end of the measuring rod 107 and the center of the brake disc body 7 are located on the same horizontal line. The outer side of the measuring rod 107 is fixedly sleeved with a circular block 109, and a first spring 110 in a compressed state is fixedly connected between the circular block 109 and the corresponding side plate 101;

[0048] The two side panels 101 are fixedly connected to a support plate 111 on the side away from each other, and a T-shaped slide rail 112 is fixedly connected to the left side of the support plate 111. A slider 113 is slidably installed on the outer side of the T-shaped slide rail 112, and a second rectangular seat 114 is rotatably installed on the outer side of the slider 113. Two first positioning rods 115 are fixedly connected to the right side of the first rectangular seat 103, and the second rectangular seat 114 is slidably sleeved on the outer sides of the corresponding two first positioning rods 115. The rotation point of the first rectangular seat 103, the center of the round rod 105 and the rotation point of the second rectangular seat 114 are located on the same straight line.

[0049] The present invention can directly measure the wear of the brake disc with a small measurement error, and can simultaneously measure the wear on both sides of the brake disc, thereby improving the measurement efficiency. When the wear on both sides of the brake disc is different, the difference between the wear on the two sides can be obtained in time, and deviation is not easy to occur, thereby reducing the parameter difference between the wear on both sides and improving the measurement accuracy.

[0050] When it is necessary to measure the wear on both sides of the brake disc body 7, hold the handle 1 and move it to the left. The handle 1 drives the measuring rod 107 and the arc plate 5 to move. The measuring rod 107 drives the corresponding first ball 108 to move to the position to be measured. The arc plate 5 drives the four second limit blocks 6 to move to the left. The four second limit blocks 6 limit the arc plate 5 so that the inner arc surface of the arc plate 5 can fit tightly with the outer side of the brake disc body 7, thereby keeping the end of the measuring rod 107 and the center of the brake disc body 7 on the same horizontal line. Then, the two pinching blocks 308 are pinched and moved in a direction approaching each other. The two pinching blocks 308 slide on the outside of the second positioning rod 307 and compress the second spring 310. The pinching blocks 308 drive the corresponding square rod 311 to move. The square rod 311 drives the corresponding second ball 312 to separate from the arc block 305. At this time, the first spring 110 in the compressed state is reset. The elastic force of the first spring 110 drives the circular block 109 to move. The circular block 109 drives the connecting block 316 to move. The connecting block 316 pulls the second spring 110 to move. The second flexible steel rope 314 slides on the outside of the second fixed pulley 315 and drives the gripping block 301 to move leftward on the outside of the U-shaped rod 3, the circular block 109 drives the measuring rod 107 to move downward, the measuring rod 107 drives the corresponding first ball 108 to contact the wear surface of the brake disc body 7, the measuring rod 107 drives the U-shaped block 106 to move toward the side plate 101, the U-shaped block 106 rotates on the outside of the two round rods 105 and drives the round rods 105 to slide on the inside of the corresponding slide groove 104, and the round rods 105 rotate on the outside of the two round rods 105 and drive the round rods 105 to slide on the inside of the corresponding slide groove 104. The rod 105 drives the first rectangular seat 103 to rotate on the outer side of the corresponding fixed seat 102 toward the side plate 101, and the first rectangular seat 103 drives the second rectangular seat 114 to move toward the side plate 101 through the corresponding two first positioning rods 115. As the second rectangular seat 114 moves, the second rectangular seat 114 slides on the outer side of the two first positioning rods 115, and the second rectangular seat 114 rotates on the outer side of the corresponding slider 113, and the second rectangular seat 114 drives the slider 113 to slide on the outer side of the T-shaped slide rail 112;

[0051] In this embodiment, specifically: the measuring assembly includes an angle measuring mechanism, the angle measuring mechanism includes an angle measuring disk 2, an annular block 202 and a pointer rod 206, the angle measuring disk 2 is arranged between the two side plates 101, two fixed rods 201 are fixedly installed on the inner side of the angle measuring disk 2, the annular block 202 is fixedly installed between the two fixed rods 201, the center of the annular block 202 coincides with the center of the angle measuring disk 2, and the top and bottom of the annular block 202 are rotatably installed with a winding shaft 204 through two bearings 203 respectively;

[0052] In this embodiment, specifically: a limit plate 205 is fixedly sleeved on the outer side of the winding shaft 204, a pointer rod 206 is fixedly installed on the outer side of the corresponding limit plate 205, a first flexible steel rope 207 is wound and fixed on the outer side of the winding shaft 204, two triangular blocks 208 are fixedly connected to the sides of the two supporting plates 111 away from each other, and a first fixed pulley 209 is rotatably installed between the sides of the two corresponding triangular blocks 208 close to each other;

[0053] In this embodiment, specifically: the end of the first flexible steel rope 207 passes around the outer side of the corresponding first fixed pulley 209 and is fixedly connected to the side of the slider 113 away from the side plate 101, and the side plate 101 is slidably sleeved on the outer side of the corresponding first flexible steel rope 207;

[0054] The slider 113 moves toward the side plate 101 and drives the first flexible steel rope 207 to slide on the outside of the first fixed pulley 209. The first flexible steel rope 207 drives the corresponding winding shaft 204 to rotate. The rotation of the winding shaft 204 drives the limit plate 205 to rotate. The rotation of the limit plate 205 drives the pointer rod 206 to rotate. At this time, the pointer rod 206 rotates to a certain angle with the center of the angle measuring disk 2. At this time, the angle α of the pointer rod 206 can be obtained by the angle set on the angle measuring disk 2. The moving distance of the slider 113 can be obtained by the formula: , r is the radius of the winding shaft 204 (a constant value). At this time, a right triangle is formed between the rotation point a of the first rectangular seat 103, the rotation point c of the second rectangular seat 114, and the projection point b of the rotation point of the first rectangular seat 103 on the T-shaped slide rail 112. The distance L2 between the rotation point of the first rectangular seat 103 and the projection point of the rotation point of the first rectangular seat 103 on the T-shaped slide rail 112 is a constant value. The rotation point of the first rectangular seat 103 and the center of the round rod 105 are located on the same straight line, and the distance L3 between the two is a constant value (a constant value in the initial horizontal state). Fig.14 At this time, the center of the round rod 105 moves a distance L4 toward the side plate 101. At this time, the formula The distance L4 moves (i.e., the distance the first ball 108 moves toward the brake disc 7) can be obtained, thereby obtaining the wear value L4 of one side of the brake disc 7. Similarly, the wear value L4 of one side of the brake disc 7 can be obtained through the formula;

[0055] When the two pointer rods 206 rotate with the center of the angle measuring disc 2, that is, there is an angle difference between the two angles α1 and α2, it is proved that there is a difference in the wear value of the two sides of the brake disc body 7 (between the two L4). Even if an error occurs in the process of angle reading (for example, the actual angle is 22 degrees, and it is read as 20 degrees), the distance L1 obtained does not match the actual distance, and there is an error. Fig.14It can be seen that the distance of L1 is much greater than the distance of L4. After calculation, the difference between L4 after error and L4 actually calculated can be obtained, thereby reducing the parameter difference between the wear amount L4 on both sides, thereby improving the measurement accuracy;

[0056] In this embodiment, specifically: the measuring assembly includes a locking mechanism, which includes a U-shaped rod 3, a rectangular rod 303, an arc block 305 and a square rod 311. The U-shaped rod 3 is fixedly installed between the angle measuring disk 2 and the handle 1. Two grip blocks 301 are slidably installed on the outer side of the U-shaped rod 3. The top of the grip block 301 is provided with a first arc hole with an opening on the left side. The grip 1 is provided with a cavity 302. The rectangular rod 303 is fixedly installed on the right side of the grip block 301. The right end of the rectangular rod 303 extends into the cavity 302. The handle 1 is slidably sleeved on the outer sides of the two rectangular rods 303.

[0057] In this embodiment, specifically: a groove 304 with an opening on the right side is provided on the side where the two rectangular rods 303 are close to each other, two arc blocks 305 are respectively fixedly installed on the inner wall of the side where the two grooves 304 are away from each other, two fixing blocks 306 are fixedly connected to the left inner wall of the cavity 302, a second positioning rod 307 is fixedly connected between the two fixing blocks 306, two pinching blocks 308 are provided on the outer sliding sleeve of the second positioning rod 307, a rectangular hole 309 is provided on the right inner wall of the cavity 302, the right side of the pinching block 308 passes through the rectangular hole 309 and extends to the outside of the handle 1, and a second arc hole is provided on the top of the pinching block 308;

[0058] In this embodiment, specifically: a second spring 310 movably sleeved on the outside of the second positioning rod 307 is fixedly connected between the two pinching blocks 308, and a square rod 311 is fixedly connected to the two pinching blocks 308 on the sides away from each other, and a second ball 312 is embedded at the end of the square rod 311. The square rod 311 is slidably installed between the arc block 305 and the corresponding groove 304, and the second ball 312 cooperates with the corresponding arc block 305, and the second ball 312 can roll on the arc surface of the arc block 305;

[0059] In this embodiment, specifically: the top and bottom of the U-shaped rod 3 are fixedly connected to two first limit blocks 313, the right side of the grip block 301 is in movably contact with the left side of the corresponding first limit block 313, the left side of the grip block 301 is fixedly connected to a second flexible steel rope 314, the right side of the circular block 109 is fixedly connected to a connecting block 316, and the sides of the two side plates 101 close to each other are rotatably installed with second fixed pulleys 315, and the end of the second flexible steel rope 314 passes around the outer side of the corresponding second fixed pulley 315 and is fixedly connected to the connecting block 316;

[0060] When the measurement is completed, hold the two grip blocks 301 and move to the right. The grip block 301 drives the second flexible steel rope 314 to move to the right. The second flexible steel rope 314 slides on the outside of the corresponding second fixed pulley 315. The second flexible steel rope 314 drives the connecting block 316 to move away from the side plate 101. The connecting block 316 drives the circular block 109 to move and compresses the first spring 110. The grip block 301 drives the rectangular rod 303 to move to the right. The rectangular rod 303 drives the arc block 305 to move. As the arc block 305 moves, the second ball 312 rolls on the arc surface of the arc block 305. The second ball 312 drives the corresponding square rod 311 to move. The square rod 311 drives The movable pinch block 308 moves, and the two pinch blocks 308 slide on the outside of the second positioning rod 307 and compress the second spring 310. When the second ball 312 is offset from the arc surface of the corresponding arc block 305, the second spring 310 in the compressed state is reset, and the elastic force of the second spring 310 drives the pinch block 308 to move, and the pinch block 308 drives the corresponding square rod 311 to move, and the square rod 311 drives the corresponding second ball 312 to move between the arc block 305 and the side wall of the groove 304, and the right side of the grip block 301 contacts the left side of the first limit block 313, so that the measuring rod 107 is reset, and the wear of other brake discs can be measured at this time.

[0061] In this embodiment, specifically: the left side of the angle measuring disc 2 is fixedly connected to the T-shaped block 4, the left side of the T-shaped block 4 is fixedly connected to the arc plate 5, the front and rear sides of the arc plate 5 are fixedly connected to two second limit blocks 6, and the arc plate 5 moves to the left so that its inner arc surface can fit tightly with the outer side of the brake disc body 7.

[0062] The present invention also proposes a method for measuring the wear of brake discs of a motor vehicle, comprising the following steps:

[0063] Step 1: Pinch the two pinching blocks 308 and move them so that the square rod 311 drives the second ball 312 to separate from the arc block 305, and the elastic force of the first spring 110 drives the measuring rod 107 to move downward through the circular block 109 to contact the wear surface of the brake disc body 7;

[0064] Step 2: The moving distance of the slider 113 can be obtained by the formula: , and through the formula The distance L4 moves can be obtained, and the wear value L4 of one side of the brake disc body 7 can be obtained;

[0065] Step 3: When the two pointer rods 206 rotate with the center of the angle measuring disk 2, that is, when there is an angle difference between the two angles α1 and α2, the formula After calculation, the difference between L4 after error and L4 actually calculated can be obtained, which reduces the parameter difference between the wear amount L4 on both sides, thereby improving the measurement accuracy;

[0066] Step 4: After the measurement is completed, hold the two gripping blocks 301 and move them to the right to contact the left side of the first limit block 313, so that the measuring rod 107 is reset. At this time, the wear of other brake discs can be measured.

[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A brake disc wear measurement assembly for a train set, comprising a handle (1), a side plate (101), a fixing seat (102), a measuring rod (107) and a first ball (108), characterized in that: The two side plates (101) are fixedly mounted on the left side of the handle (1); the two fixing seats (102) are respectively fixedly mounted on the sides of the two side plates (101) away from each other; a first rectangular seat (103) is rotatably mounted on the outer side of the fixing seat (102); a slide groove (104) is provided on the top and bottom of the first rectangular seat (103); a round rod (105) is slidably mounted on the inner side of the slide groove (104); the same U-shaped block (106) is rotatably mounted on the outer sides of the two corresponding round rods (105); and the two measuring rods ( 107) are respectively fixedly installed on the sides of the two U-shaped blocks (106) close to each other, the side plate (101) is slidably sleeved on the outer side of the corresponding measuring rod (107), the first ball (108) is embedded in the end of the corresponding measuring rod (107), the end of the measuring rod (107) and the center of the brake disc body (7) are located on the same horizontal line, the outer side of the measuring rod (107) is fixedly sleeved with a circular block (109), and a first spring (110) in a compressed state is fixedly connected between the circular block (109) and the corresponding side plate (101); The two side plates (101) are fixedly connected to a support plate (111) on the sides away from each other, the left side of the support plate (111) is fixedly connected to a T-shaped slide rail (112), a slider (113) is slidably mounted on the outer side of the T-shaped slide rail (112), a second rectangular seat (114) is rotatably mounted on the outer side of the slider (113), two first positioning rods (115) are fixedly connected to the right side of the first rectangular seat (103), and the second rectangular seat (114) is slidably sleeved on the corresponding two first positioning rods (115). The outer side of a positioning rod (115), the rotation point of the first rectangular seat (103), the center of the round rod (105) and the rotation point of the second rectangular seat (114) are located on the same straight line, the measuring assembly comprises an angle measuring mechanism, the angle measuring mechanism comprises an angle measuring disk (2), an annular block (202) and a pointer rod (206), the angle measuring disk (2) is arranged between two side plates (101), the inner side of the angle measuring disk (2) is fixedly mounted with two fixing rods (201), the annular block (202) The circular ring block (202) is fixedly mounted between two fixed rods (201), the center of the circle of the circular ring block (202) coincides with the center of the circle of the angle measuring disk (2), the top and bottom of the circular ring block (202) are rotatably mounted with a winding shaft (204) via two bearings (203), the outer side of the winding shaft (204) is fixedly sleeved with a limit plate (205), the pointer rod (206) is fixedly mounted with the outer side of the corresponding limit plate (205), and the outer side of the winding shaft (204) is wound and fixed with a first flexible steel rope (204). 07), two triangular blocks (208) are fixedly connected to the sides of the two support plates (111) away from each other, and a first fixed pulley (209) is rotatably installed between the sides of the two corresponding triangular blocks (208) close to each other, and the end of the first flexible steel rope (207) passes around the outer side of the corresponding first fixed pulley (209) and is fixedly connected to the side of the slider (113) away from the side plate (101), and the side plate (101) is slidably sleeved on the outer side of the corresponding first flexible steel rope (207).

2. The brake disc wear measurement assembly for EMU according to claim 1, characterized in that: The measuring assembly comprises a locking mechanism, which comprises a U-shaped rod (3), a rectangular rod (303), an arc block (305) and a square rod (311); the U-shaped rod (3) is fixedly mounted between the angle measuring disk (2) and the handle (1); two grip blocks (301) are slidably mounted on the outer side of the U-shaped rod (3); a first arc hole with an opening on the left side is provided on the top of the grip block (301); a cavity (302) is provided on the handle (1); the rectangular rod (303) is fixedly mounted on the right side of the grip block (301); the right end of the rectangular rod (303) extends into the cavity (302); the handle (1) is slidably sleeved between the two rectangular rods (303); and the second arc hole (305) is provided on the top of the grip block (301). The outer side of the rectangular rod (303), the sides of the two rectangular rods (303) close to each other are each provided with a groove (304) with an opening on the right side, the two arc blocks (305) are respectively fixedly installed on the inner wall of the two grooves (304) away from each other, two fixed blocks (306) are fixedly connected to the left inner wall of the cavity (302), a second positioning rod (307) is fixedly connected between the two fixed blocks (306), the outer side of the second positioning rod (307) is provided with two pinching blocks (308), a rectangular hole (309) is opened on the right inner wall of the cavity (302), and the right side of the pinching block (308) passes through The rectangular hole (309) extends outside the handle (1), a second arc-shaped hole is opened on the top of the pinch block (308), a second spring (310) movably sleeved on the outside of the second positioning rod (307) is fixedly connected between the two pinch blocks (308), a square rod (311) is fixedly connected to the side of the two pinch blocks (308) away from each other, a second ball (312) is embedded at the end of the square rod (311), the square rod (311) is slidably installed between the arc block (305) and the corresponding groove (304), the second ball (312) cooperates with the corresponding arc block (305), and the second ball (312) can be The arc block (305) rolls on the arc surface, the top and bottom of the U-shaped rod (3) are fixedly connected to two first limit blocks (313), the right side of the grip block (301) is in movably contact with the left side of the corresponding first limit block (313), the left side of the grip block (301) is fixedly connected to a second flexible steel rope (314), the right side of the circular block (109) is fixedly connected to a connecting block (316), and the sides of the two side plates (101) close to each other are rotatably installed with a second fixed pulley (315), and the end of the second flexible steel rope (314) passes around the outer side of the corresponding second fixed pulley (315) and is fixedly connected to the connecting block (316).

3. The brake disc wear measurement assembly for EMU according to claim 2, characterized in that: The left side of the angle measuring disc (2) is fixedly connected to a T-shaped block (4), the left side of the T-shaped block (4) is fixedly connected to an arc-shaped plate (5), the front side and the rear side of the arc-shaped plate (5) are both fixedly connected to two second limit blocks (6), and the inner arc surface of the arc-shaped plate (5) can be tightly fitted with the outer side of the brake disc body (7) when it moves to the left.

4. A method for measuring the wear of brake discs of EMUs, characterized in that: The method of using the brake disc wear measurement assembly for a train set as claimed in claim 3 comprises the following steps: Step 1: Pinch the two pinching blocks (308) and move them so that the square rod (311) drives the second ball (312) to separate from the arc block (305), and the elastic force of the first spring (110) drives the measuring rod (107) to move downward through the circular block (109) to contact the wear surface of the brake disc body (7); Step 2: The moving distance of the slider (113) is obtained by the formula: , where α is the angle of rotation of the pointer rod, r is the radius of the winding shaft 204, and through the formula Obtain the distance moved by L4, and obtain the wear value L4 of one side of the brake disc body (7), wherein a right triangle is formed between the rotation point a of the first rectangular seat, the rotation point c of the second rectangular seat, and the projection point b of the rotation point of the first rectangular seat on the T-shaped slide rail, L2 is the distance between the rotation point a and the projection point b, L3 is the distance between the rotation point of the first rectangular seat (103) and the center of the round rod (105) in the initial horizontal state, and L4 is the distance moved by the center of the round rod (105) toward the side plate (101); Step 3: When the two pointer rods (206) rotate with the center of the angle measuring disk (2), if there is an angle difference between the two angles α1 and α2, the formula After calculation, the difference between L4 after error and L4 actually calculated can be obtained, reducing the parameter difference between the wear amount L4 on both sides, thereby improving the measurement accuracy; Step 4: After the measurement is completed, hold the two gripping blocks (301) and move them to the right to contact the left side of the first limit block (313), so that the measuring rod (107) is reset. At this time, the wear of other brake discs can be measured.

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