Method for Measuring and Selecting Brake Friction Pad Assemblies for Transmissions

Abstract

The present invention relates to the field of friction plate group measurement and selection, and in particular to a method for measuring and selecting a friction plate group of a transmission brake, the steps of which include: S1: using a friction plate group thickness measuring device to measure a standard friction plate group without an adjustment steel plate installed, and setting the measurement value of the standard friction plate group to zero; S2: using a friction plate group thickness measuring device to measure a friction plate group to be tested without an adjustment steel plate installed, and uploading the measurement value of the friction plate group to be tested to a PLC, and the PLC processes to obtain the thickness B of the friction plate group to be tested; S3: a friction plate group error prevention device performs error prevention detection on the friction plate group to be tested; S4: calculating and obtaining the thickness C of the adjustment steel plate required for this transmission, and taking an adjustment steel plate of corresponding thickness; S5: assembling the adjustment steel plate into a friction plate group that has passed the test and has not been installed with an adjustment steel plate. The above-mentioned friction plate group measurement and selection method effectively solves the problem of low measurement accuracy, improves the degree of automation and measurement accuracy.

Description

Technical Field

[0001] The invention relates to the field of friction plate group measurement and matching, and in particular to a transmission brake friction plate group measurement and matching method. Background Art

[0002] At present, the brake of the transmission is an important part of the transmission, which realizes the braking of the transmission. The brake includes a brake outer hub and a friction plate group, wherein the friction plate group includes a friction plate, a steel plate, and an adjustment steel plate. The selection of a friction plate group with a suitable thickness plays a very critical role in the performance of the brake. The traditional method of selecting the friction plate group has insufficient measurement accuracy, resulting in an unsatisfactory thickness of the selected friction plate group, frequent brake failure, and low assembly efficiency. In addition, the friction plate group contains multiple friction plates and multiple steel plates, which are easy to be misassembled during assembly, which can easily cause brake failure.

[0003] At present, no technical solution that can solve the above technical problems has been found in the existing public technologies. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a transmission brake friction plate group measurement and selection method in view of the above shortcomings. Compared with the prior art, it achieves a high degree of automation, improved measurement accuracy and the function of detecting whether the friction plate group is assembled correctly.

[0005] In order to solve the above technical problems, the technical solution of the present invention is:

[0006] In a transmission brake friction plate group measurement and selection method, the transmission brake friction plate group measurement and selection equipment includes a friction plate group thickness measuring device, a friction plate group error prevention device and a PLC; the friction plate group error prevention device includes a first proximity switch and a second proximity switch;

[0007] The transmission brake friction plate group measurement and selection method includes the following steps:

[0008] S1: using the friction plate group thickness measuring device to measure a standard friction plate group without an adjustment steel plate installed, and setting the measurement value of the standard friction plate group to zero;

[0009] S2: using the friction plate group thickness measuring device to measure the friction plate group to be tested without the adjustment steel plate installed, the measured value of the friction plate group to be tested is uploaded to the PLC, and the PLC processes to obtain the thickness B of the friction plate group to be tested;

[0010] S3: The friction plate group error prevention device performs error prevention detection on the friction plate group to be tested. If the PLC receives a signal transmitted by the first proximity switch, it proceeds to step S4; if the PLC receives a signal transmitted by the second proximity switch, the PLC outputs a signal indicating that the friction plate group to be tested is unqualified for assembly and reassembles it;

[0011] S4: Calculate the thickness C of the adjustment steel sheet required for the transmission, and take the adjustment steel sheet of corresponding thickness;

[0012] S5: Assemble the adjusting steel plate into the friction plate group that has passed the inspection but has not installed the adjusting steel plate.

[0013] Furthermore, the transmission brake friction plate group measurement and matching equipment also includes an adjustment steel sheet rack, on which a plurality of material columns are arranged horizontally, and an indicator light is arranged at the front end of the material column; step S4 also includes PLC controlling the indicator lights on the corresponding material columns of the adjustment steel sheet rack to light up.

[0014] Further, the transmission brake friction plate group measurement optional equipment also includes an adjustment steel plate re-inspection device;

[0015] Step S1 also includes measuring a standard adjusting steel sheet with the adjusting steel sheet re-inspection device, and setting the measured value of the standard adjusting steel sheet to zero; step S4 also includes measuring the adjusting steel sheet with the adjusting steel sheet re-inspection device, uploading the measured value to the PLC, and the PLC calculating the actual thickness C' of the adjusting steel sheet; comparing the actual thickness C' of the adjusting steel sheet with the thickness C of the adjusting steel sheet required for this transmission, and outputting an instruction on whether the thickness of the selected adjusting steel sheet is qualified.

[0016] Furthermore, the friction plate group thickness measuring device measures the thickness of the workpiece after pressing the workpiece to be tested by driving the measuring component through the cylinder; the transmission brake friction plate group measurement optional equipment also includes a cylinder position detection device, and the cylinder position detection device includes two proximity switches arranged upper and lower; step S3 also includes that when the cylinder approaches the proximity switch below the cylinder position detection device, the PLC starts the friction plate group error prevention device.

[0017] The present invention adopts the above technical solution, and has the following advantages compared with the prior art:

[0018] The friction plate group thickness measuring device can automatically measure the friction plate group and integrates a high-precision measuring sensor to improve the measurement accuracy. It has a sophisticated structure and automatically loads pressure when measuring the friction plate group to prevent inaccurate measurement of the friction plate group.

[0019] The friction plate group error prevention device can determine whether the friction plate group is properly assembled through the signals transmitted by the first proximity switch and the second proximity switch, and can effectively prevent the incorrect or missed assembly of the friction plate group.

[0020] The measured data is uploaded to the PLC, which automatically calculates the reasonable adjustment of the steel sheet. The high degree of automation can ensure the reasonable piston stroke of the brake and facilitate the operation of the assembly personnel.

[0021] The setting of the adjustment steel sheet re-inspection device allows the staff to further measure the selected adjustment steel sheets to ensure the accuracy of assembly.

[0022] By setting up multiple groups of contact displacement sensors, the thickness of the friction plate group at multiple locations is measured and the average value is taken to improve data reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic block diagram of the transmission brake friction plate group measurement and selection method of the present invention;

[0024] Figure 2 It is a three-dimensional structural schematic diagram of the transmission brake friction plate group measurement and matching equipment of the present invention;

[0025] Figure 3 It is a three-dimensional structural schematic diagram of the friction plate group thickness measuring device in the present invention;

[0026] Figure 4 It is a three-dimensional structural schematic diagram of the friction plate group error prevention device of the present invention;

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of adjusting the steel sheet material rack in the present invention;

[0028] Figure 6 It is a three-dimensional structural schematic diagram of the steel sheet adjustment re-inspection device in the present invention.

[0029] In the figure:

[0030] 1- Workbench,

[0031] 2-friction plate group thickness measuring device, 201-upper frame, 202-measuring device connecting plate, 203-cylinder, 204-guide rod, 205-installation shaft, 206-connection sleeve, 207-first spring, 208-installation plate, 209-contact displacement sensor, 210-contact block, 211-measuring base, 212-pressing plate, 213-measuring plate, 214-measuring column, 215-cylinder position detection device,

[0032] 3-friction plate group error prevention device, 301-error prevention base, 302-sliding seat, 303-connecting rod, 304-detection block, 305-rotating block, 306-indicator plate, 307-first proximity switch, 308-second proximity switch,

[0033] 4-Adjust the steel sheet rack, 401-Material column, 402-Indicator light,

[0034] 5-adjusting steel sheet re-inspection device, 501-re-inspection rack, 502-re-inspection measuring plate, 503-pressing rod, 504-compression spring, 505-detection rod, 506-second spring, 507-first contact displacement sensor, 508-adjusting steel sheet placement area, 509-adjusting steel sheet limit pressure plate,

[0035] 6-Electrical control cabinet. DETAILED DESCRIPTION

[0036] Examples, such as Figure 1-Figure 6 As shown, the transmission brake friction plate group measurement optional equipment includes a workbench 1, a friction plate group thickness measuring device 2, a friction plate group error prevention device 3, an adjustment steel plate material rack 4, an adjustment steel plate re-inspection device 5 and an electric control cabinet 6. The friction plate group thickness measuring device 2, the friction plate group error prevention device 3, the adjustment steel plate material rack 4, the adjustment steel plate re-inspection device 5 and the electric control cabinet 6 are installed on the table of the workbench 1. The electric control cabinet 6 is provided with PLC, switch conversion equipment, alarm equipment, protective electrical appliances, protection and control circuits, frequency converters and auxiliary equipment to ensure the normal operation of the transmission brake friction plate group measurement optional equipment, and a control panel electrically connected to the PLC is provided on the outer surface of the electric control cabinet 6.

[0037] The friction plate group thickness measuring device 2 integrates a high-precision measuring sensor, which can automatically measure the thickness of the friction plate group without the adjustment steel plate installed. The friction plate group thickness measuring device 2 includes an upper frame 201, and a start switch and a cylinder position detection device 215 are arranged on the top of the upper frame 201. The cylinder position detection device 215 is two proximity switches arranged up and down; the PLC receives the start measurement instruction, starts the cylinder 203 to move downward, and presses the test piece. At this time, the cylinder 203 approaches the proximity switch below the cylinder position detection device 215, and the signal is transmitted to the PLC; after the contact displacement sensor 209 returns the measurement result and the friction plate group error prevention device 3 returns the detection result, the PLC issues an upward instruction for the cylinder 203, and the cylinder 203 moves upward until the cylinder 203 approaches the proximity switch above the cylinder position detection device 215 and stops. A measuring device connecting plate 202 that moves up and down is provided on the upper frame 201, and the measuring device connecting plate 202 is arranged in a horizontal direction; a cylinder seat is provided on the top of the upper frame 201, and a cylinder 203 is fixed on the top of the cylinder seat, and the output end of the cylinder 203 passes through the top surface of the upper frame 201 and is bolted to the measuring device connecting plate 202, and the cylinder 203 drives the measuring device connecting plate 202 to move up and down. The power and control devices related to the cylinder are existing technologies, so they are not repeated; four guide rods 204 are provided on the top of the upper frame 201 for sliding up and down, and the bottom ends of the guide rods 204 are fixedly connected to the measuring device connecting plate 202 by bolts.

[0038] The bottom surface of the measuring device connecting plate 202 is bolted with a mounting shaft 205, which is arranged vertically downward; the bottom end of the mounting shaft 205 is sleeved with a connecting sleeve 206, and a first elastic element is arranged between the connecting sleeve 206 and the mounting shaft 205, and the first elastic element is a first spring 207, the top end of the first spring 207 is connected to the extension surface outside the mounting shaft 205, and the bottom end of the first spring 207 is connected to the extension surface inside the connecting sleeve 206. The top of the connecting sleeve 206 extends horizontally outward to form a mounting plate 208, and a contact displacement sensor 209 is arranged on the mounting plate 208. The contact displacement sensor 209 can be Citizen SA-S110 / SA-S510, or other contact displacement sensors that can achieve measurement; different compression amounts of the contact displacement sensor generate different resistance values, and the contact displacement sensor has a signal converter to convert signals of different resistance values ​​into displacement signal values, and the measurement accuracy is high. The bottom of the connecting sleeve 206 is integrally formed with a contact block 210, and a measuring base 211 is arranged below the contact block 210. A limit pin is inserted at the top of the measuring base 211 to limit the friction plate group without the adjustment steel plate installed. The outer side of the connecting sleeve 206 is sleeved with a clamping plate 212 and a measuring plate 213 in sequence from top to bottom; three connecting shafts are evenly distributed on the top surface of the clamping plate 212 in the circumferential direction, and the clamping plate 212 is fixedly connected to the bottom surface of the measuring device connecting plate 202 through the connecting shafts; the measuring plate 213 can be directly fixedly connected to the bottom of the clamping plate 212, and the measuring plate 213 can also be slidably arranged below the clamping plate 212 through a sliding rod. A measuring column 214 that matches the contact displacement sensor 209 is arranged above the measuring plate 213. The top surface area of ​​the measuring column 214 is small, and it is easier to ensure its flatness, which is beneficial to the measurement of the contact displacement sensor 209.

[0039] Of course, the friction plate group thickness measuring device 2 can also be the same device as the adjustment steel plate re-inspection device 5.

[0040] The working process of the friction plate group thickness measuring device 2 is as follows: first, a standard friction plate group without an adjustment steel plate is placed on the measuring base 211, and the friction plate group thickness measuring device 2 is started. The cylinder 203 drives the measuring device connecting plate 202 to move downward, and the connecting sleeve 206 moves downward until the cylinder 203 presses the standard friction plate group without an adjustment steel plate, that is, the pressing plate 212 drives the measuring plate 213 to press the standard friction plate group without an adjustment steel plate, and the measuring column 214 on the measuring plate 213 presses the contact displacement sensor 209, and the value measured by the contact displacement sensor 209 is set to zero. The thickness H of the standard friction plate group without an adjustment steel plate is known, and the friction plate group thickness measuring device 2 is used to measure the friction plate group to be tested without an adjustment steel plate. The reading of the contact displacement sensor 209 is the thickness difference D between the test piece and the standard piece. The reading of the contact displacement sensor 209 is uploaded to the PLC, and the thickness B of the friction plate group to be tested is obtained after being processed by the PLC, that is, B=H+D. The friction plate group thickness measuring device 2 can automatically measure the friction plate group and integrate a high-precision measuring sensor to improve the measurement accuracy; it has a sophisticated structure and automatically loads pressure when measuring the friction plate group to prevent inaccurate measurement of the friction plate group.

[0041] Due to the tolerance of the friction plate and the steel plate, the thickness of the friction plate group will be inconsistent after assembly. In order to measure more accurately, the measuring plate 213 and the connecting sleeve 206 are in floating cooperation, that is, the measuring plate 213 can move radially along the connecting sleeve 206 or swing. The measuring plate 213 and the pressing plate 212 are in floating cooperation, that is, the measuring plate 213 can move radially along the pressing plate 212 or swing. A second elastic element is arranged between the measuring plate 213 and the pressing plate 212. The second elastic element is a connecting spring. The measuring plate 213 and the pressing plate 212 are connected by a sliding rod, and the sliding rod passes through the connecting spring. There are three contact displacement sensors 209, which are evenly distributed on the outer circumference of the mounting plate 208, and the corresponding three measuring columns 214 are arranged on the measuring plate 213. The readings of the three contact displacement sensors 209 are uploaded to the PLC, and the PLC takes the average of the three readings for subsequent processing.

[0042] The friction plate group error proofing device 3 is arranged at the rear of the measuring base 211, and the friction plate group error proofing device 3 includes an error proofing base 301, a slide seat 302 is arranged on the top of the error proofing base 301 for sliding back and forth, a first cylinder is arranged on the error proofing base 301, and a slide rail is arranged between the slide seat 302 and the error proofing base 301, and the slide seat 302 is pushed to move back and forth along the slide rail by the first cylinder. An extension plate is vertically extended upward on the front side of the slide 302, and a connecting rod 303 is slidably arranged on the extension plate. A detection block 304 is integrally formed on the front side of the connecting rod 303, and a third elastic element is arranged between the detection block 304 and the slide 302, that is, a third elastic element is arranged between the detection block 304 and the extension plate, and the third elastic element is a third spring. The front side of the detection block 304 is tooth-shaped, and the front side of the detection block 304 cooperates with the friction plate group that is correctly assembled and has no adjustment steel plate installed; a rotating block 305 is rotatably arranged on the slide 302, and the rotating block 305 is rotatably connected to the rear end of the connecting rod 303; a proximity switch bracket is arranged on the rear side of the slide 302, and a first proximity switch 307 and a second proximity switch 308 are arranged on the left and right sides of the proximity switch bracket in turn. The proximity switch is a position switch that can be operated without direct mechanical contact with the moving parts. When an object approaches the sensing surface of the switch to the action distance, the signal can be transmitted to the PLC without mechanical contact or applying any pressure. The proximity switch can be an Omron E2B-M12KS04-M1-B1 proximity switch sensor, or other proximity switches that can achieve this function. An indicator plate 306 is fixedly arranged on the top surface of the rotating block 305, and the front portion of the indicator plate 306 is welded to the rotating block 305. In a normal state, the rear portion of the indicator plate 306 is located below the first proximity switch 307, the tooth shape of the detection block 304 cannot be inserted into the test piece, and the rear portion of the indicator plate 306 is located below the second proximity switch 308.

[0043] The working process of the friction plate group error prevention device 3: when the cylinder 203 in the friction plate group thickness measuring device 2 moves to the lowest position, that is, the proximity switch below the cylinder position detection device 215 is close to the cylinder 203, that is, the measuring plate 213 in the friction plate group thickness measuring device 2 presses the workpiece to be tested, and the signal is transmitted to the PLC. The PLC issues a first cylinder start instruction, and the first cylinder pushes the slide 302 forward. If the tooth shape of the detection block 304 can be inserted into the friction plate group to be tested, the position of the friction plate and the steel plate is assembled qualifiedly, and the indicator plate 306 is located below the first proximity switch 307, the first proximity switch 307 signal is transmitted to the PLC, and the PLC outputs a qualified assembly instruction, and the next operation can be performed. If the tooth shape of the detection block 304 cannot be inserted into the friction plate group to be tested, the connecting rod 303 moves backward relative to the slide 302, and the rotating block 305 drives the indicator plate 306 to rotate. The rear part of the indicator plate 306 is located below the second proximity switch 308. The signal of the second proximity switch 308 is transmitted to the PLC, and the PLC outputs an assembly failure instruction, which effectively prevents the wrong assembly of the friction plate group. Two proximity switches are arranged in the front-to-back direction on one side of the friction plate group error prevention device 3, and the two proximity switches are arranged in the front-to-back direction, namely proximity switch A and proximity switch B. When the friction plate group error prevention device 3 receives the instruction of the PLC, the first cylinder pushes the slide 302 to move forward. When it reaches the proximity switch A, the proximity switch A transmits the signal to the PLC, and the PLC controls the first cylinder to stop moving. When the PLC receives the signal of the first proximity switch 307 or the second proximity switch 308, that is, the friction plate group error prevention detection has been completed, the PLC controls the first cylinder to pull the slide 302 to move backward until it moves to the proximity switch B and stops.

[0044] Adjust the steel sheet rack 4 to horizontally install several material columns 401, such as Figure 5 As shown, there are 12 material columns 401 in total, and adjustment steel sheets of different thicknesses are placed on the material columns 401. A label is set on one side of the material column 401, and the thickness of the corresponding adjustment steel sheet is marked on the label; an indicator light 402 is set at the front end of the material column 401, and the indicator light 402 is electrically connected to the PLC. The thickness value A of the friction plate group required for this transmission is known, and the thickness C of the adjustment steel sheet required for this transmission is the difference between the thickness value A of the friction plate group required for this transmission and the thickness B of the friction plate group to be tested that is qualified and has no adjustment steel sheet installed, that is, C=AB. C is obtained by calculation by PLC, and the indicator light 402 at the front end of the corresponding material column 401 is controlled to light up, and the staff can assemble. In order to ensure the accuracy of the thickness of the selected adjustment steel sheet, the adjustment steel sheet on the selected material column 401 can be re-inspected.

[0045] In order to make the thickness of the steel sheet adjusted more accurately, the present invention is provided with a re-inspection device 5 for adjusting the steel sheet, and the re-inspection device 5 for adjusting the steel sheet includes a re-inspection frame 501, and a back plate is vertically arranged upward on the rear side of the re-inspection frame 501, and a second cylinder is fixed on the upper front side of the back plate, and a re-inspection measuring plate 502 is fixedly connected to the output end of the second cylinder, and the second cylinder drives the re-inspection measuring plate 502 to move up and down. A pressure rod 503 is arranged on the re-inspection measuring plate 502 for sliding in the vertical direction, and a fourth elastic element is arranged between the pressure rod 503 and the re-inspection measuring plate 502, and the fourth elastic element is a clamping spring 504, and the top end of the clamping spring 504 is connected to the bottom surface of the re-inspection measuring plate 502, and the bottom end of the clamping spring 504 is connected to the bottom end of the pressure rod 503, and the pressure rod 503 passes through the inside of the clamping spring 504; a detection rod 505 is arranged on the re-inspection measuring plate 502 for sliding in the vertical direction, and a fifth elastic element is arranged between the detection rod 505 and the re-inspection measuring plate 502, and the fifth elastic element is a second Spring 506, the top end of the second spring 506 is connected to the bottom surface of the re-detection measuring plate 502, the bottom end of the second spring 506 is connected to the bottom end of the detection rod 505, and the detection rod 505 passes through the second spring 506; the first contact displacement sensor 507 is arranged above the re-detection measuring plate 502 through a support frame, and the detection head of the first contact displacement sensor 507 cooperates with the top surface of the detection rod 505; an adjustment steel sheet placement area 508 is arranged below the re-detection measuring plate 502, and an adjustment steel sheet limit pressure plate 509 is connected to the adjustment steel sheet placement area 508 by bolts.

[0046] The working process of the adjustment steel sheet re-inspection device 5 is as follows: place the standard adjustment steel sheet between the adjustment steel sheet limit pressure plate 509 and the adjustment steel sheet placement area 508; start the second cylinder to drive the re-inspection measurement plate 502 to move downward, and the bottom end of the detection rod 505 presses the adjustment steel sheet to prevent the adjustment steel sheet from moving and affecting the measurement result; when the bottom end of the detection rod 505 touches the adjustment steel sheet, it no longer moves, and the first contact displacement sensor 507 continues to descend and contacts the top surface of the detection rod 505, setting the value measured by the first contact displacement sensor 507 to zero, and the second cylinder moves upward to take out the standard adjustment steel sheet. Take down the adjustment steel sheet of corresponding thickness on the adjustment steel sheet rack 4, place it in the adjustment steel sheet placement area 508, repeat the above measurement process, and obtain the reading of the first contact displacement sensor 507, which is the difference E between the thickness of the test piece and the standard adjustment steel sheet, and upload it to the PLC; the thickness F of the standard adjustment steel sheet is known, and the thickness C' of the actual adjustment steel sheet is the sum of the thickness F of the standard adjustment steel sheet and the difference E between the thickness of the test piece and the standard adjustment steel sheet, that is, C'=F+E. The value of C' is calculated by PLC and compared with the thickness C of the adjustment steel sheet required for this transmission to determine whether the thickness of the selected adjustment steel sheet is qualified to prevent wrong installation.

[0047] Of course, the adjustment steel sheet re-inspection device 5 can also be a device that is the same as the friction plate group thickness measuring device 2 .

[0048] Transmission brake friction plate group measurement and selection method:

[0049] S1: Use the friction plate group thickness measuring device 2 to measure the standard friction plate group without the adjustment steel plate installed, and set the measured value of the standard friction plate group to zero.

[0050] S2: Use the friction plate group thickness measuring device 2 to measure the friction plate group to be tested without the adjustment steel plate installed. The measured value of the friction plate group to be tested is uploaded to the PLC, and the PLC processes to obtain the thickness B of the friction plate group to be tested.

[0051] S3: When the cylinder 203 approaches the proximity switch below the cylinder position detection device 215, the PLC starts the friction plate group error prevention device 3;

[0052] The friction plate group error prevention device 3 performs error prevention detection on the friction plate group to be tested. If the PLC receives a signal transmitted by the first proximity switch 307, it enters step S4;

[0053] If the PLC receives the signal transmitted by the second proximity switch 308, the PLC outputs a signal indicating that the friction plate group to be tested is unqualified and needs to be reassembled.

[0054] S4: PLC calculates the thickness C of the steel sheet required for adjusting the transmission; controls the indicator light 402 on the corresponding material column 401 to light up, and removes the corresponding adjustment steel sheet.

[0055] S5: Assemble the adjusting steel plate into the qualified friction plate group without the adjusting steel plate installed.

[0056] Of course, in order to select the adjustment steel sheet more accurately, step S1 also includes measuring the standard adjustment steel sheet with the adjustment steel sheet re-inspection device 5, and setting the measured value of the standard adjustment steel sheet to zero. Step S4 also includes measuring the adjustment steel sheet with the adjustment steel sheet re-inspection device 5, uploading the measured value to the PLC, and the PLC calculates the actual thickness C' of the adjustment steel sheet, compares the actual thickness C' of the adjustment steel sheet with the thickness C of the adjustment steel sheet required for the transmission, and outputs an instruction on whether the thickness of the selected adjustment steel sheet is qualified.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A transmission brake friction plate group measurement and selection method, characterized in that: The transmission brake friction plate group measurement optional equipment comprises a friction plate group thickness measuring device (2), a friction plate group error prevention device (3) and a PLC; the friction plate group error prevention device (3) comprises a first proximity switch (307) and a second proximity switch (308); The transmission brake friction plate group measurement and selection method includes the following steps: S1: using the friction plate group thickness measuring device (2) to measure a standard friction plate group without an adjustment steel plate installed, and setting the measurement value of the standard friction plate group to zero; S2: using the friction plate group thickness measuring device (2) to measure the friction plate group to be measured without the adjustment steel plate installed, and uploading the measured value of the friction plate group to be measured to the PLC, which processes the value to obtain the thickness B of the friction plate group to be measured; S3: the friction plate group error prevention device (3) performs error prevention detection on the friction plate group to be tested. If the PLC receives a signal transmitted by the first proximity switch (307), it proceeds to step S4; If the PLC receives the signal transmitted by the second proximity switch (308), the PLC outputs a signal indicating that the friction plate group to be tested is unqualified and reassembles it; S4: Calculate the thickness C of the adjustment steel sheet required for the transmission, and take the adjustment steel sheet of corresponding thickness; S5: Assembling the adjusting steel sheet to the friction plate group that has passed the inspection and is not equipped with the adjusting steel sheet; The friction plate group error prevention device (3) is arranged at the rear of the measuring base (211), and the friction plate group error prevention device (3) comprises an error prevention base (301), a slide seat (302) is arranged above the error prevention base (301) to slide forward and backward, a first cylinder is arranged on the error prevention base (301), a slide rail is arranged between the slide seat (302) and the error prevention base (301), and the slide seat (302) is pushed forward and backward along the slide rail by the first cylinder, an extension plate is arranged vertically upward on the front side of the slide seat (302), a connecting rod (303) is arranged on the extension plate to slide forward and backward, and a detection block (304) is integrally formed on the front side of the connecting rod (303), and a third elastic element is arranged between the detection block (304) and the slide seat (302), that is, a third elastic element is arranged between the detection block (304) and the extension plate, and the third elastic element is a third spring, and the detection block The front side of the (304) is tooth-shaped, the front side of the detection block (304) cooperates with the friction plate group that is correctly assembled and has no adjustment steel plate installed, a rotating block (305) is rotatably arranged on the slide (302), the rotating block (305) is rotatably connected to the rear end of the connecting rod (303), a proximity switch bracket is arranged on the rear side of the slide (302), and the first proximity switch (307) and the second proximity switch (308) are arranged on the left and right sides of the proximity switch bracket in sequence, an indicator plate (306) is fixedly arranged on the top surface of the rotating block (305), the front part of the indicator plate (306) is welded to the rotating block (305), and in a normal state, the rear part of the indicator plate (306) is located below the first proximity switch (307), the tooth shape of the detection block (304) cannot be inserted into the test piece, and the rear part of the indicator plate (306) is located below the second proximity switch (308); The working process of the friction plate group error prevention device (3) is as follows: when the cylinder (203) in the friction plate group thickness measuring device (2) moves to the lowest position, that is, the proximity switch below the cylinder position detection device (215) is close to the cylinder (203), that is, the measuring plate (213) in the friction plate group thickness measuring device (2) presses the piece to be tested, and the signal is transmitted to the PLC. The PLC issues a first cylinder start instruction, and the first cylinder pushes the slide seat (302) to move forward. If the tooth shape of the detection block (304) can be inserted into the friction plate group to be tested, the position of the friction plate and the steel plate is assembled properly, and the indicator plate (306) is located below the first proximity switch (307). The signal of the first proximity switch (307) is transmitted to the PLC, and the PLC outputs an assembly qualified instruction, and the next step can be performed. If the tooth shape of the detection block (304) cannot be inserted into the friction plate group to be tested, the connecting rod (303) moves backward relative to the slide seat (302), and the rotating block (304) is rotated. 05) drives the indicator plate (306) to rotate, and the rear part of the indicator plate (306) is located below the second proximity switch (308). The signal of the second proximity switch (308) is transmitted to the PLC, and the PLC outputs an assembly failure instruction, which effectively prevents the wrong or missed assembly of the friction plate group. Two proximity switches are arranged on one side of the friction plate group error prevention device (3). The two proximity switches are arranged in the front-to-back direction, namely proximity switch A and proximity switch B. When the friction plate group error prevention device (3) receives the instruction of the PLC, the first cylinder pushes the slide (302) to move forward. When it reaches the proximity switch A, the proximity switch A transmits the signal to the PLC, and the PLC controls the first cylinder to stop moving. When the PLC receives the signal of the first proximity switch (307) or the second proximity switch (308), that is, the friction plate group error prevention detection has been completed, the PLC controls the first cylinder to pull the slide (302) to move backward until it moves to the proximity switch B and stops.

2. The transmission brake friction plate group measurement and selection method as claimed in claim 1, characterized in that: The transmission brake friction plate group measurement and matching equipment also includes an adjustment steel sheet material rack (4), on which a plurality of material columns (401) are arranged, the material columns (401) are arranged in a horizontal direction, and an indicator light (402) is arranged at the front end of the material column (401); Step S4 also includes PLC control to adjust the indicator light (402) on the corresponding material column (401) of the steel sheet material rack (4) to light up.

3. The transmission brake friction plate group measurement and selection method as claimed in claim 1, characterized in that: The transmission brake friction plate group measurement optional equipment also includes an adjustment steel plate re-inspection device (5); Step S1 also includes measuring a standard adjustment steel sheet using the adjustment steel sheet re-inspection device (5), and setting the measured value of the standard adjustment steel sheet to zero; Step S4 also includes measuring the adjusting steel sheet with the adjusting steel sheet re-inspection device (5), uploading the measured value to the PLC, and the PLC calculating the actual thickness C' of the adjusting steel sheet; comparing the actual thickness C' of the adjusting steel sheet with the thickness C of the adjusting steel sheet required for the transmission, and outputting an instruction on whether the thickness of the selected adjusting steel sheet is qualified.

4. The transmission brake friction plate group measurement and selection method as claimed in claim 1, characterized in that: The friction plate group thickness measuring device (2) drives the measuring component to press the test piece through the cylinder (203) to measure its thickness; the transmission brake friction plate group measurement optional equipment also includes a cylinder position detection device (215), and the cylinder position detection device (215) includes two proximity switches arranged in an upper and lower position; Step S3 also includes that when the cylinder (203) approaches a proximity switch below the cylinder position detection device (215), the PLC activates the friction plate group error prevention device (3).

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