Brake pad bonding strength shearing test device and test method

Abstract

The invention belongs to the technical field of brake pad bonding strength testing, and particularly relates to a brake pad bonding strength shear testing device and method.The brake pad bonding strength shear testing device comprises a testing box, a testing cavity is formed in the testing box, a sliding groove is formed in the bottom of the testing cavity, and sliding plates are symmetrically installed in the sliding groove in a sliding mode; clamping plates are fixedly mounted on the opposite sides of the two sliding plates, and first anti-skid pads are fixedly mounted on the opposite sides of the two clamping plates; the driving assembly is located in the test box and is used for driving the two sliding plates to get close to each other or get away from each other; the brake pad testing device can stably clamp and fix a brake pad, it is guaranteed that the brake pad does not deviate during testing, the protective door can play a role in protection in the testing process, the situation that the brake pad or a shear knife is broken is avoided, it is guaranteed that chippings do not splash to scratch people, and after the shear knife is broken, the brake pad or the shear knife is prevented from splashing to scratch people. The broken shear knife can be conveniently replaced by a worker, and a replacement tool does not need to be used during replacement.

Description

Technical Field

[0001] The present invention belongs to the technical field of brake pad bonding strength testing, and in particular relates to a brake pad bonding strength shear testing device and a testing method. Background Art

[0002] In the braking systems of vehicles such as cars and motorcycles, brake pads are crucial safety components. Their performance is directly related to the vehicle's braking effect and driving safety. Brake pads are usually made of friction material and steel backing bonded together by an adhesive. Bond strength is one of the key indicators for measuring brake pad quality. In order to ensure the bonding quality of brake pads, a shear test is required to simulate the shear force that the brake pads will withstand in actual use and evaluate whether the bonding performance meets the requirements.

[0003] At present, the existing brake pad bond strength shear test device has some urgent problems to be solved when testing brake pads. On the one hand, the traditional test device has poor clamping and fixing effect on the brake pad. During the shear test, the brake pad may shift due to loose clamping, resulting in inaccurate test results and unable to truly reflect the brake pad bond strength. This not only affects the quality assessment of the product, but also may pose a hidden danger to traffic safety. On the other hand, the existing test device lacks effective protection measures to prevent the brake pad or shear blade from breaking during the shearing process. When the shear force is too large or uneven, the brake pad may crack. The shear blade may also break due to excessive wear or stress concentration. The debris generated by the breakage is easy to splash out and may scratch the operator, posing a safety risk. In addition, when the shear blade breaks, the replacement process is relatively cumbersome. Traditional test devices usually require a special replacement tool to remove and install the shear blade, which not only increases the workload of the operator, but also prolongs the downtime of the test device and reduces the test efficiency. In view of this, we propose a brake pad bond strength shear test device and test method. Summary of the Invention

[0004] The object of the present invention is to provide a brake pad bond strength shear strength testing device and testing method to solve the problems raised in the above background technology.

[0005] In view of this, the present invention provides a brake pad bond strength shear testing device and testing method, comprising: A test box, wherein a test cavity is defined in the test box, a sliding groove is defined at the bottom of the test cavity, sliding plates are symmetrically slidably installed in the sliding groove, clamping plates are fixedly installed on opposite sides of two sliding plates, and anti-slip pads are fixedly installed on opposite sides of two clamping plates; A driving assembly, located in the test box and used to drive the two sliding plates toward or away from each other; A hydraulic cylinder, the hydraulic cylinder is fixedly mounted on the top of the test chamber, a pressure sensor is fixedly mounted on the output end of the hydraulic cylinder, a mounting block is fixedly mounted on the bottom end of the pressure sensor, a plug-in slot is provided at the bottom of the mounting block, and a shearing knife is plugged and mounted in the plug-in slot; A fixing assembly, the fixing assembly being located in the mounting block and being used to fix the shearing knife; A protective door is rotatably mounted on one side of the test box, a handle is fixedly mounted on one side of the protective door, and a display screen is fixedly mounted on one side of the test box and below the protective door; A limiting component is located inside the protective door and is used to limit the protective door.

[0006] In the present technical solution, when in use, a person can place the brake pad to be tested between the two clamping plates, and then the person can use the driving assembly to drive the two sliding plates closer to each other. The closer the two sliding plates are, the closer the two clamping plates will be, until the two clamping plates clamp the brake pad. At this time, the two anti-slip pads will be deformed. Under the action of the friction force of the two anti-slip pads, the brake pad can be prevented from slipping between the two clamping plates, ensuring that the brake pad can be firmly clamped and fixed, and ensuring that the brake pad will not deviate during testing. After the brake pad is fixed, the personnel can turn the protective door and close it. When the protective door is completely closed, the limit assembly can limit the protective door. Then the personnel can start the hydraulic cylinder. The output shaft of the hydraulic cylinder will drive the pressure sensor to move downward. The downward movement of the pressure sensor will drive the mounting block to move downward. The downward movement of the mounting block will drive the shear knife to move downward. The downward movement of the shear knife can perform a shear test on the brake pad. At the same time, the pressure sensor can test the downward pressure of the shear knife and display the data on the display screen for easy viewing by personnel. Until the brake pad is separated, the bonding strength of the brake pad can be tested at this time. During the test, the protective door can play a protective role to prevent the brake pad or shear knife from collapsing and ensure that debris will not fly and scratch people. When the shear knife breaks, the personnel can release the limit of the shear knife through the fixing component, and the personnel can pull the shear knife out of the socket and replace it. After the replacement is completed, the fixing component can fix the shear knife to ensure that when the shear knife breaks, it is easy for personnel to replace the broken shear knife, and no replacement tools are required during replacement.

[0007] In the above technical solution, further, the driving component includes: A bidirectional threaded rod is rotatably installed in a sliding groove, one end of the bidirectional threaded rod passes through two sliding plates, a mounting groove is provided in the test box and on one side of the sliding groove, a motor is fixedly installed in the mounting groove, and the output end of the motor passes through one side of the mounting groove and is coaxially connected to the bidirectional threaded rod.

[0008] In this technical solution, the motor is started, and the output shaft of the motor will drive the bidirectional threaded rod to rotate. Under the action of the thread, the rotation of the bidirectional threaded rod will drive the two sliding plates to approach each other, and the approach of the two sliding plates to each other will drive the two clamping plates to approach each other until the two clamping plates clamp the brake pad. At this time, the two anti-slip pads will be deformed. Under the action of the friction force of the two anti-slip pads, the brake pad can be prevented from slipping between the two clamping plates, ensuring that the brake pad can be firmly clamped and fixed, and ensuring that the brake pad will not shift during testing.

[0009] In the above technical solution, further, the bidirectional threaded rod is threadedly connected to the sliding plate, the bidirectional threaded rod is provided with two sections of threads with opposite rotation directions, and the output shaft of the motor is rotationally connected to the test box.

[0010] In this technical solution, it is ensured that the rotation of the bidirectional threaded rod can drive the two sliding plates to move closer to or away from each other.

[0011] In the above technical solution, further, the fixing assembly includes: A slide groove is provided in the mounting block and is located on one side of the shearing knife. A limit block is slidably installed in the slide groove. The bottom end of the limit block passes through the bottom end of the slide groove and rests on one side of the shearing knife. A plurality of springs fixed to the top of the slide groove are fixedly installed on the top of the limit block. One side of the limit block passes through the slide groove and is fixedly installed with a pressing plate.

[0012] The shear knife is then fixed by the operator, who can then easily replace the broken shear knife by pressing the springs, which will release the force of the springs when the shear knife is broken.

[0013] In the above technical solution, further, the bottom end of the limit block is engaged with the shear knife.

[0014] In this technical solution, it is ensured that the bottom end of the limit block can be stuck on one side of the shearing knife.

[0015] In the above technical solution, further, the limiting component includes: Two grooves, both of which are opened in the protective door, with spring blocks slidingly installed in the grooves, and limiting holes are opened in the test box and at the top and bottom of the protective door, one end of the spring block passes through the groove and extends to the corresponding limiting hole, and the other end of the spring block is fixedly installed in the groove with a pull rod, one end of the pull rod passes through the groove and extends to the outside, and a spring 2 is sleeved on the pull rod and located in the groove.

[0016] In this technical solution, after the brake pad is fixed, the personnel can turn the protective door to close it. At the same time, the test box will squeeze the two spring blocks to move, and the movement of the spring blocks will squeeze the spring 2 to contract. When the protective door is completely closed, under the action of the rebound force of the two springs 2, the two springs 2 will squeeze the two spring blocks to move until one end of the two spring blocks is inserted into the two limit holes respectively, thereby limiting the protective door to ensure that the protective door can play a protective role during the test, avoid the brake pad or shear knife from breaking, and ensure that debris will not fly out and scratch people.

[0017] In the above technical solution, further, one end of the elastic block is plugged into the limiting hole, one end of the elastic block is in an inclined structure, and the pull rod is slidably connected to the groove.

[0018] In this technical solution, it is ensured that one end of the elastic block can be inserted into the limiting hole, that the test box can squeeze the elastic block to move, and that the pull rod can slide normally in the groove.

[0019] In the above technical solution, further comprising: Pad 1, said pad 1 is fixedly installed at the bottom of the test cavity and located between the two sliding plates, an anti-slip pad 2 is fixedly installed on the top of said pad 1, T-slot 1 is provided on both sides of said pad 1, an insert is installed in said T-slot 1, pad 2 is fixedly installed on one side of said insert, a protective pad 3 is fixedly installed on the top of said pad 2, and a T-slot 2 is provided on one side of said pad 2.

[0020] In this technical solution, personnel can place the brake pad that needs to be tested on top of pad one. At this time, the anti-slip pad two and the protective pad three can play an anti-slip role. At the same time, personnel can install an appropriate amount of pad two on pad one according to the thickness of the brake pad, so as to adapt to brake pads of different thicknesses.

[0021] In the above technical solution, further, the top surface of the pad block 1 is an arc-shaped structure, the top surface of the pad block 2 is an arc-shaped structure, and the pressure sensor is electrically connected to the display screen.

[0022] In this technical solution, it is ensured that the brake pads will not roll on pads one and two, and that the pressure measured by the pressure sensor can be displayed on the display screen for easy viewing by personnel.

[0023] In the above technical solution, further, it includes the following method:.

[0024] Step S1. During use, a person can press the two pull rods to bring the two pull rods closer to each other. The closer the two pull rods are, the more they will drive the two spring blocks closer to each other. The movement of the spring blocks will squeeze the spring 2 to contract until one end of the two spring blocks are respectively moved out of the two limit holes. At this time, the two spring blocks can release the limit of the protective door, and the person can hold the handle to open the protective door. Then, the person can place the brake pad to be tested on the top of the pad 1. At this time, the anti-slip pad 2 and the protective pad 3 can play an anti-slip role. At the same time, the person can install an appropriate amount of pad 2 on the pad 1 according to the thickness of the brake pad, so as to adapt to brake pads of different thicknesses. Step S2: Then the personnel can start the motor, and the output shaft of the motor will drive the bidirectional threaded rod to rotate. Under the action of the thread, the rotation of the bidirectional threaded rod will drive the two sliding plates to approach each other, and the two sliding plates approaching each other will drive the two clamping plates to approach each other until the two clamping plates clamp the brake pad. At this time, the two anti-slip pads will be deformed. Under the action of the friction force of the two anti-slip pads, the brake pad can be prevented from slipping between the two clamping plates, ensuring that the brake pad can be firmly clamped and fixed, and ensuring that the brake pad will not deviate during testing; Step S3, after the brake pad is fixed, the personnel can rotate the protective door to close the protective door. At the same time, the test box will squeeze the two spring blocks to move, and the movement of the spring blocks will squeeze the spring 2 to contract. When the protective door is completely closed, under the action of the rebound force of the two springs 2, the two springs 2 will squeeze the two spring blocks to move until one end of the two spring blocks is respectively inserted into the two limit holes, thereby limiting the protective door. Then the personnel can start the hydraulic cylinder, and the output shaft of the hydraulic cylinder will drive the pressure sensor to move downward. The downward movement of the pressure sensor will drive the mounting block to move downward. The downward movement of the mounting block will drive the shear knife to move downward. The downward movement of the shear knife can perform a shear test on the brake pad. At the same time, the pressure sensor can test the downward pressure of the shear knife and display the data on the display screen for easy viewing by personnel until the brake pad is separated. At this time, the bonding strength of the brake pad can be tested. Step S4: During the test, the protective door can play a protective role to prevent the brake pad or shear knife from breaking and ensure that debris does not splash and scratch people; Step S5. When the shear knife breaks, the personnel can press the pressing plate upwards. The upward movement of the pressing plate will drive the limit block to move upwards. The upward movement of the limit block will squeeze the springs to contract until the bottom end of the limit block moves out from one side of the shear knife. At this time, the limit block can release the limit of the shear knife, and the personnel can pull the shear knife out of the socket and replace it. After the replacement is completed, the pressing plate is released. At this time, under the action of the rebound force of the springs, the springs will squeeze the limit block to move downwards until the bottom end of the limit block rests on one side of the shear knife, thereby fixing the shear knife, ensuring that when the shear knife breaks, it is convenient for personnel to replace the broken shear knife, and no replacement tools are required during replacement.

[0025] The beneficial effects of the present invention are: 1. The brake pad bond strength shear test device and test method, through the provided drive assembly, ensures that the brake pad can be firmly clamped and fixed under the mutual cooperation of the drive assembly, sliding plate, clamping plate, anti-slip pad 1, pad 1, pad 2, anti-slip pad 2 and protective pad 3, ensuring that the brake pad will not deviate during the test.

[0026] 2. The brake pad bond strength shear test device and test method, through the setting of the limit component, with the cooperation of the limit component and the protective door, ensures that the protective door can play a protective role during the test, avoiding the brake pad or shear knife from breaking, and ensuring that debris does not fly out and scratch people.

[0027] 3. The brake pad bonding strength shear test device and test method, through the provision of a fixing component, ensures that when the shear knife is broken, personnel can easily replace the broken shear knife through the cooperation of the fixing component, the plug-in slot and the shear knife, and no replacement tools are required during replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the internal detailed structure of the test box in the present invention; Figure 3 Schematic diagram of the cross-sectional structure of the test box in the present invention; Figure 4 Schematic diagram of the internal detailed structure of the mounting block in the present invention; Figure 5 This is a schematic diagram of the structure of the shear knife explosion in the present invention; Figure 6 Schematic diagram of the cross-sectional structure of the protective door in the present invention; Figure 7 For the present invention Figure 6 A in the middle is an enlarged structural diagram; Figure 8 It is a structural schematic diagram of the explosion of the cushion block 2 in the present invention.

[0029] The marks in the figure are: 1. Test box; 2. Test cavity; 3. Sliding groove; 4. Sliding plate; 5. Clamping plate; 6. Anti-slip pad 1; 7. Bidirectional threaded rod; 8. Mounting groove; 9. Motor; 10. Hydraulic cylinder; 11. Pressure sensor; 12. Mounting block; 13. Insertion slot; 14. Shear knife; 15. Sliding groove; 16. Limit block; 17. Spring 1; 18. Press plate; 19. Protective door; 20. Groove; 21. Spring block; 22. Limit hole; 23. Pull rod; 24. Spring 2; 25. Handle; 26. Pad 1; 27. Anti-slip pad 2; 28. T-slot 1; 29. Pad 2; 30. Insert block; 31. Protective pad 3; 32. T-slot 2; 33. Display screen. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0031] In the description of this application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0032] It should be noted that the terms "first," "second," etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and that the objects distinguished by "first," "second," etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0033] It should be noted that, in the description of this application, the directions or positional relationships indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional terms do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional terms "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0034] It should be noted that, in the present application, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0035] Example 1: See also Figure 1 - Figure 8 As shown, this embodiment provides a brake pad bond strength shear testing device, comprising: A test box 1 is provided with a test cavity 2, a sliding groove 3 is provided at the bottom of the test cavity 2, sliding plates 4 are symmetrically slidably installed in the sliding groove 3, clamping plates 5 are fixedly installed on opposite sides of the two sliding plates 4, and anti-slip pads 6 are fixedly installed on opposite sides of the two clamping plates 5; A driving assembly is located in the test box 1 and is used to drive the two sliding plates 4 to move closer to or away from each other; A hydraulic cylinder 10 is fixedly mounted on the top of the test chamber 2. A pressure sensor 11 is fixedly mounted on the output end of the hydraulic cylinder 10. A mounting block 12 is fixedly mounted on the bottom end of the pressure sensor 11. A socket 13 is formed at the bottom of the mounting block 12. A shearing knife 14 is mounted in the socket 13. A fixing assembly is located in the mounting block 12 and is used to fix the shear blade 14; A protective door 19 is rotatably mounted on one side of the test box 1 , a handle 25 is fixedly mounted on one side of the protective door 19 , and a display screen 33 is fixedly mounted on one side of the test box 1 and below the protective door 19 ; The limiting component is located inside the protective door 19 and is used to limit the protective door 19.

[0036] When in use, a person can place the brake pad to be tested between the two clamping plates 5, and then the person can drive the two sliding plates 4 to approach each other through the driving assembly. The approach of the two sliding plates 4 to each other will drive the two clamping plates 5 to approach each other until the two clamping plates 5 clamp the brake pad. At this time, the two anti-slip pads 6 will be deformed. Under the action of the friction force of the two anti-slip pads 6, the brake pad can be prevented from slipping between the two clamping plates 5, ensuring that the brake pad can be firmly clamped and fixed, and ensuring that the brake pad will not deviate during testing; After the brake pad is fixed, the personnel can rotate the protective door 19 to close the protective door 19. When the protective door 19 is completely closed, the limit assembly can limit the protective door 19. Then the personnel can start the hydraulic cylinder 10. The output shaft of the hydraulic cylinder 10 will drive the pressure sensor 11 to move downward. The downward movement of the pressure sensor 11 will drive the mounting block 12 to move downward. The downward movement of the mounting block 12 will drive the shearing knife 14 to move downward. The downward movement of the shearing knife 14 can perform a shear test on the brake pad. At the same time, the pressure sensor 11 can test the downward pressure of the shearing knife 14 and display the data on the display screen 33, which is convenient for personnel to watch until the brake pad is separated. At this time, the bonding strength of the brake pad can be tested. During the test, the protective door 19 can play a protective role to prevent the brake pad or the shearing knife 14 from collapsing, and ensure that debris will not splash and scratch people. When the shear blade 14 breaks, the personnel can release the limit of the shear blade 14 through the fixing component, and the personnel can pull the shear blade 14 out of the plug-in slot 13 and replace it. After the replacement is completed, the fixing component can fix the shear blade 14, ensuring that when the shear blade 14 breaks, it is easy for personnel to replace the broken shear blade 14, and no replacement tools are needed during replacement.

[0037] Example 2: This embodiment provides a brake pad bond strength shear test device. In addition to the technical solutions of the above embodiments, it also has the following technical features. The drive assembly includes: A bidirectional threaded rod 7 is rotatably mounted in the sliding groove 3. One end of the bidirectional threaded rod 7 passes through the two sliding plates 4. A mounting groove 8 is provided in the test box 1 and on one side of the sliding groove 3. A motor 9 is fixedly mounted in the mounting groove 8. The output end of the motor 9 passes through one side of the mounting groove 8 and is coaxially connected to the bidirectional threaded rod 7.

[0038] Among them, the motor 9 is started, and the output shaft of the motor 9 will drive the bidirectional threaded rod 7 to rotate. Under the action of the thread, the rotation of the bidirectional threaded rod 7 will drive the two sliding plates 4 to approach each other. The approach of the two sliding plates 4 to each other will drive the two clamping plates 5 to approach each other until the two clamping plates 5 clamp the brake pads. At this time, the two anti-slip pads 6 will be deformed. Under the action of the friction force of the two anti-slip pads 6, the brake pads can be prevented from slipping between the two clamping plates 5, ensuring that the brake pads can be firmly clamped and fixed, and ensuring that the brake pads will not deviate during testing.

[0039] Example 3: This embodiment provides a brake pad bonding strength shear test device. In addition to the technical solutions of the above embodiments, it also has the following technical features: a bidirectional threaded rod 7 is threadedly connected to the sliding plate 4, and the bidirectional threaded rod 7 is provided with two sections of threads with opposite rotation directions, and the output shaft of the motor 9 is rotatably connected to the test box 1.

[0040] The rotation of the bidirectional threaded rod 7 is ensured to drive the two sliding plates 4 to move closer to or away from each other.

[0041] Example 4: This embodiment provides a brake pad bond strength shear test device. In addition to the technical solutions of the above embodiments, it also has the following technical features. The fixing assembly includes: The chute 15 is opened in the mounting block 12 and is located on one side of the shearing knife 14. A limit block 16 is slidably installed in the chute 15. The bottom end of the limit block 16 passes through the bottom end of the chute 15 and rests on one side of the shearing knife 14. The top of the limit block 16 is fixedly installed with a plurality of springs 17 fixed to the top of the chute 15. One side of the limit block 16 passes through the chute 15 and is fixedly installed with a pressing plate 18.

[0042] Among them, when the shear knife 14 collapses, the personnel can press the pressing plate 18 upwards, and the upward movement of the pressing plate 18 will drive the limit block 16 to move upwards. The upward movement of the limit block 16 will squeeze the springs 17 to shrink until the bottom end of the limit block 16 moves out of one side of the shear knife 14. At this time, the limit block 16 can release the limit of the shear knife 14, and the personnel can pull the shear knife 14 out of the plug slot 13 and replace it. After the replacement is completed, the pressing plate 18 is released. At this time, under the action of the rebound force of the springs 17, the springs 17 will squeeze the limit block 16 to move downwards until the bottom end of the limit block 16 rests on one side of the shear knife 14, thereby fixing the shear knife 14, ensuring that when the shear knife 14 collapses, it is convenient for personnel to replace the collapsed shear knife 14, and no replacement tools are required during replacement.

[0043] Example 5: This embodiment provides a brake pad bonding strength shearing test device, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the bottom end of the limit block 16 is engaged with the shearing knife 14.

[0044] Here, it is ensured that the bottom end of the limiting block 16 can be stuck on one side of the shearing knife 14 .

[0045] Example 6: This embodiment provides a brake pad bond strength shear test device. In addition to the technical solutions of the above embodiments, it also has the following technical features. The limit assembly includes: Two grooves 20 are both opened in the protective door 19. A spring block 21 is slidably installed in the groove 20. Limit holes 22 are opened in the test box 1 and at the top and bottom of the protective door 19. One end of the spring block 21 passes through the groove 20 and extends to the corresponding limit hole 22. The other end of the spring block 21 is fixedly installed in the groove 20 with a pull rod 23. One end of the pull rod 23 passes through the groove 20 and extends to the outside. A spring 24 is sleeved on the pull rod 23 and located in the groove 20.

[0046] Among them, after the brake pad is fixed, the personnel can rotate the protective door 19 to close the protective door 19. At the same time, the test box 1 will squeeze the two spring blocks 21 to move, and the movement of the spring blocks 21 will squeeze the spring 24 to contract. When the protective door 19 is completely closed, under the action of the rebound force of the two springs 24, the two springs 24 will squeeze the two spring blocks 21 to move until one end of the two spring blocks 21 is respectively inserted into the two limit holes 22, thereby limiting the protective door 19 to ensure that the protective door 19 can play a protective role during the test, avoid the brake pad or shear knife 14 from collapsing, and ensure that debris will not splash out and scratch people.

[0047] Example 7: This embodiment provides a brake pad bonding strength shear test device. In addition to the technical solutions of the above-mentioned embodiments, it also has the following technical features: one end of the spring block 21 is plugged into the limiting hole 22, one end of the spring block 21 is in an inclined structure, and the pull rod 23 is slidably connected to the groove 20.

[0048] Here, it is ensured that one end of the elastic block 21 can be inserted into the limiting hole 22 , so that the test box 1 can squeeze the elastic block 21 to move, and so that the pull rod 23 can slide normally in the groove 20 .

[0049] Example 8: This embodiment provides a brake pad bond strength shear testing device. In addition to the technical solutions of the above embodiments, it also has the following technical features: Pad 1 26 is fixedly installed at the bottom of the test chamber 2 and located between the two sliding plates 4. An anti-slip pad 27 is fixedly installed on the top of pad 1 26. T-slot 1 28 is provided on both sides of pad 1 26. An insert 30 is inserted into the T-slot 1 28. Pad 2 29 is fixedly installed on one side of the insert 30. A protective pad 31 is fixedly installed on the top of pad 2 29. A T-slot 2 32 is provided on one side of pad 2 29.

[0050] Among them, personnel can place the brake pad that needs to be tested on the top of pad 1 26. At this time, anti-slip pad 2 27 and protective pad 3 31 can play an anti-slip role. At the same time, personnel can install an appropriate amount of pad 2 29 on pad 1 26 according to the thickness of the brake pad, so as to adapt to brake pads of different thicknesses.

[0051] Example 9: This embodiment provides a brake pad bonding strength shear test device. In addition to the technical solutions of the above-mentioned embodiments, it also has the following technical features: the top surface of pad 1 26 is an arc-shaped structure, the top surface of pad 2 29 is an arc-shaped structure, and the pressure sensor 11 is electrically connected to the display screen 33 to ensure that the pressure measured by the pressure sensor 11 can be displayed on the display screen 33 for easy viewing by people.

[0052] Here, it is ensured that the brake pad will not roll on the pad 1 26 and the pad 2 29 .

[0053] Example 10: This embodiment provides a brake pad bonding strength shear test method, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including the following methods:.

[0054] Step S1. During use, a person can press the two pull rods 23 to bring the two pull rods 23 closer to each other. The closer the two pull rods 23 are to each other, the two spring blocks 21 will be driven to move closer to each other. The movement of the spring blocks 21 will squeeze the spring 24 to contract until one end of the two spring blocks 21 is respectively moved out of the two limiting holes 22. At this time, the two spring blocks 21 can release the limit of the protective door 19. The person can hold the handle 25 to open the protective door 19. Then the person can place the brake pad to be tested on the top of the pad 1 26. At this time, the anti-slip pad 2 27 and the protective pad 3 31 can play an anti-slip role. At the same time, the person can install an appropriate amount of pad 2 29 on the pad 1 26 according to the thickness of the brake pad, so as to adapt to brake pads of different thicknesses. Step S2, the personnel can then start the motor 9, and the output shaft of the motor 9 will drive the bidirectional threaded rod 7 to rotate. Under the action of the thread, the rotation of the bidirectional threaded rod 7 will drive the two sliding plates 4 to approach each other, and the two sliding plates 4 approaching each other will drive the two clamping plates 5 to approach each other until the two clamping plates 5 clamp the brake pads. At this time, the two anti-slip pads 6 will be deformed. Under the action of the friction force of the two anti-slip pads 6, the brake pads can be prevented from slipping between the two clamping plates 5, ensuring that the brake pads can be firmly clamped and fixed, and ensuring that the brake pads will not deviate during testing; When the protective door 19 is completely closed, the two spring blocks 21 are squeezed and moved by the rebound force of the two spring blocks 24, and the two spring blocks 24 are squeezed and moved until one end of the two spring blocks 21 is respectively inserted into the two limiting holes 22, thereby limiting the protective door 19. Then, the personnel can start the hydraulic cylinder 10, and the output shaft of the hydraulic cylinder 10 will drive the pressure sensor 11 to move downward. The downward movement of the pressure sensor 11 will drive the mounting block 12 to move downward. The downward movement of the mounting block 12 will drive the shear knife 14 to move downward. The downward movement of the shear knife 14 can perform a shear test on the brake pad. At the same time, the pressure sensor 11 can test the downward pressure of the shear knife 14 and display the data on the display screen 33 for easy viewing by personnel, until the brake pad is separated. At this time, the bonding strength of the brake pad can be tested. Step S4: During the test, the protective door 19 can play a protective role to prevent the brake pad or the shear knife 14 from breaking and ensure that debris does not splash and scratch people; Step S5, when the shear knife 14 collapses, the personnel can press the pressing plate 18 upwards, and the upward movement of the pressing plate 18 will drive the limit block 16 to move upwards. The upward movement of the limit block 16 will squeeze the springs 17 to contract until the bottom end of the limit block 16 moves out from one side of the shear knife 14. At this time, the limit block 16 can release the limit of the shear knife 14, and the personnel can pull the shear knife 14 out of the plug-in slot 13 and replace it. After the replacement is completed, the pressing plate 18 is released. At this time, under the action of the rebound force of the springs 17, the springs 17 will squeeze the limit block 16 to move downwards until the bottom end of the limit block 16 rests on one side of the shear knife 14, thereby fixing the shear knife 14, ensuring that when the shear knife 14 collapses, it is convenient for personnel to replace the collapsed shear knife 14, and no replacement tools are required during replacement.

[0055] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A brake pad bond strength shear test device, characterized in that: include: A test box (1), wherein a test cavity (2) is provided in the test box (1), a sliding groove (3) is provided at the bottom of the test cavity (2), a sliding plate (4) is symmetrically slidably installed in the sliding groove (3), a clamping plate (5) is fixedly installed on opposite sides of two sliding plates (4), and an anti-slip pad (6) is fixedly installed on opposite sides of two clamping plates (5); A driving assembly, the driving assembly being located in the test box (1) and being used to drive the two sliding plates (4) to move closer to or farther from each other; A hydraulic cylinder (10), wherein the hydraulic cylinder (10) is fixedly mounted on the top of the test chamber (2), a pressure sensor (11) is fixedly mounted on the output end of the hydraulic cylinder (10), a mounting block (12) is fixedly mounted on the bottom end of the pressure sensor (11), a plug-in slot (13) is provided at the bottom of the mounting block (12), and a shearing knife (14) is plugged and mounted in the plug-in slot (13); A fixing assembly, the fixing assembly being located in the mounting block (12) and being used to fix the shearing knife (14); A protective door (19), the protective door (19) being rotatably mounted on one side of the test box (1), a handle (25) being fixedly mounted on one side of the protective door (19), and a display screen (33) being fixedly mounted on one side of the test box (1) and located below the protective door (19); A limiting component is located inside the protective door (19) and is used to limit the protective door (19).

2. A brake pad bond strength shear testing device according to claim 1, characterized in that: The drive assembly includes: A bidirectional threaded rod (7) is rotatably mounted in the sliding groove (3), one end of the bidirectional threaded rod (7) passes through two sliding plates (4), a mounting groove (8) is provided in the test box (1) and on one side of the sliding groove (3), a motor (9) is fixedly mounted in the mounting groove (8), an output end of the motor (9) passes through one side of the mounting groove (8) and is coaxially connected to the bidirectional threaded rod (7).

3. A brake pad bond strength shear testing device according to claim 2, characterized in that: The bidirectional threaded rod (7) is threadedly connected to the sliding plate (4), and the bidirectional threaded rod (7) is provided with two sections of threads with opposite rotation directions. The output shaft of the motor (9) is rotationally connected to the test box (1).

4. A brake pad bond strength shear testing device according to claim 1, characterized in that: The fixing assembly includes: A chute (15), the chute (15) is opened in the mounting block (12) and is located on one side of the shearing knife (14), a limit block (16) is slidably installed in the chute (15), the bottom end of the limit block (16) passes through the bottom end of the chute (15) and abuts against one side of the shearing knife (14), a plurality of springs (17) fixed to the top of the chute (15) are fixedly installed on the top of the limit block (16), and one side of the limit block (16) passes through the chute (15) and is fixedly installed with a pressing plate (18).

5. A brake pad bond strength shear testing device according to claim 4, characterized in that: The bottom end of the limit block (16) is engaged with the shear knife (14).

6. A brake pad bond strength shear testing device according to claim 1, characterized in that: The limiting component includes: Two grooves (20), both of the grooves (20) are opened in the protective door (19), a spring block (21) is slidably installed in the groove (20), and a limiting hole (22) is opened in the test box (1) and at the top and bottom of the protective door (19), one end of the spring block (21) passes through the groove (20) and extends into the corresponding limiting hole (22), and a pull rod (23) is fixedly installed at the other end of the spring block (21) and is located in the groove (20), one end of the pull rod (23) passes through the groove (20) and extends to the outside, and a spring 2 (24) is sleeved on the pull rod (23) and is located in the groove (20).

7. A brake pad bond strength shear testing device according to claim 6, characterized in that: One end of the elastic block (21) is plugged into the limiting hole (22), one end of the elastic block (21) is in an inclined structure, and the pull rod (23) is slidably connected to the groove (20).

8. The brake pad bond strength shear testing device according to claim 1, characterized in that: Also includes: A pad (26) is fixedly installed at the bottom of the test cavity (2) and located between the two sliding plates (4); a non-slip pad (27) is fixedly installed on the top of the pad (26); a T-shaped slot (28) is provided on both sides of the pad (26); an insert (30) is inserted into the T-shaped slot (28); a pad (29) is fixedly installed on one side of the insert (30); a protective pad (31) is fixedly installed on the top of the pad (29); and a T-shaped slot (32) is provided on one side of the pad (29).

9. A brake pad bond strength shear testing device according to claim 8, characterized in that: The top surface of the pad block 1 (26) is in an arc-shaped structure, the top surface of the pad block 2 (29) is in an arc-shaped structure, and the pressure sensor (11) is electrically connected to the display screen (33).

10. A brake pad bond strength shear test method, used in a brake pad bond strength shear test device according to any one of claims 1 to 9, characterized in that: This includes the following methods: Step S1. When in use, a person can press the two pull rods (23) to make the two pull rods (23) approach each other. The approach of the two pull rods (23) will drive the two spring blocks (21) to approach each other. The movement of the spring blocks (21) will squeeze the spring 2 (24) to shrink until one end of the two spring blocks (21) moves out of the two limiting holes (22) respectively. At this time, the two spring blocks (21) can release the limit of the protective door (19). The person can hold the handle (25) to open the protective door (19). Then the person can place the brake pad to be tested on the top of the pad 1 (26). At this time, the anti-slip pad 2 (27) and the protective pad 3 (31) can play an anti-slip role. At the same time, the person can install an appropriate amount of pad 2 (29) on the pad 1 (26) according to the thickness of the brake pad, so as to adapt to brake pads of different thicknesses; Step S2, the personnel can then start the motor (9), and the output shaft of the motor (9) will drive the bidirectional threaded rod (7) to rotate. Under the action of the thread, the rotation of the bidirectional threaded rod (7) will drive the two sliding plates (4) to approach each other, and the two sliding plates (4) approaching each other will drive the two clamping plates (5) to approach each other until the two clamping plates (5) clamp the brake pad. At this time, the two anti-skid pads (6) will be deformed. Under the action of the friction force of the two anti-skid pads (6), the brake pad can be prevented from slipping between the two clamping plates (5), ensuring that the brake pad can be firmly clamped and fixed, and ensuring that the brake pad will not deviate during testing; Step S3, after the brake pads are fixed, the personnel can rotate the protective door (19) to close the protective door (19). At the same time, the test box (1) will squeeze the two spring blocks (21) to move, and the movement of the spring blocks (21) will squeeze the spring 2 (24) to shrink. When the protective door (19) is completely closed, under the action of the rebound force of the two springs 2 (24), the two springs 2 (24) will squeeze the two spring blocks (21) to move until one end of the two spring blocks (21) is inserted into the two limiting holes (22) respectively, thereby limiting the protective door (19). Then the personnel can start The hydraulic cylinder (10) is provided with an output shaft of the hydraulic cylinder (10) that drives the pressure sensor (11) to move downward, and the downward movement of the pressure sensor (11) drives the mounting block (12) to move downward, and the downward movement of the mounting block (12) drives the shearing knife (14) to move downward, and the downward movement of the shearing knife (14) can perform a shear test on the brake pad, and at the same time, the pressure sensor (11) can test the downward pressure of the shearing knife (14) and display the data on the display screen (33) for easy viewing by personnel, until the brake pad is separated, at which time the bonding strength of the brake pad can be tested; Step S4: During the test, the protective door (19) can play a protective role to prevent the brake pad or the shear knife (14) from breaking and ensure that debris does not splash and injure people; Step S5, when the shearing knife (14) collapses, the personnel can press the pressing plate (18) upwards, and the upward movement of the pressing plate (18) will drive the limit block (16) to move upwards, and the upward movement of the limit block (16) will squeeze the plurality of springs (17) to shrink until the bottom end of the limit block (16) moves out from one side of the shearing knife (14). At this time, the limit block (16) can release the limit of the shearing knife (14), and the personnel can remove the shearing knife (14) from the insertion slot (13). The shearing knife (14) is pulled out and replaced. After the replacement is completed, the pressing plate (18) is released. At this time, under the action of the rebound force of the plurality of springs (17), the plurality of springs (17) will squeeze the limit block (16) to move downward until the bottom end of the limit block (16) is against one side of the shearing knife (14), thereby fixing the shearing knife (14) and ensuring that when the shearing knife (14) is broken, it is convenient for personnel to replace the broken shearing knife (14) and no replacement tools are needed during the replacement.

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