Brake pad friction material pressing-out force testing device

Abstract

The invention discloses a brake pad friction material press-out force testing device, which can accurately re-engrave the surface shape of a brake pad through a positioning bag in a positioning assembly in combination with the liquid-solid conversion characteristic of electrorheological fluid, and transmits deformation information to an extrusion pad through the multi-layer design of a moving rod and the extrusion pad, so that the brake pad friction material press-out force testing device can accurately test the press-out force of the brake pad friction material. Precise adaptation to the surface shape of the brake pad is achieved; by utilizing the flowing and curing characteristics of the non-Newtonian fluid, the extrusion pad can provide uniform supporting force under the driving of the pressure frame, so that the problem of uneven stress distribution caused by surface abrasion or irregular shape is solved; besides, the sealing and recycling design of the limiting sealing plate and the storage box ensures the stability and repeatability of the filling process, fluid leakage or waste is avoided, the adaptability, the testing precision and the operation efficiency of the testing device are remarkably improved through the synergistic effect of the overall structure, and the pressure-out force testing requirements under various working conditions can be met.

Description

Technical Field

[0001] The invention relates to the technical field of press-off force testing, and more particularly to a brake pad friction material press-off force testing device. Background Art

[0002] Brake pads are an important part of the vehicle braking system, and the performance of their friction materials is directly related to the braking effect and safety. In order to evaluate and optimize the quality of brake pads, they need to be subjected to a press-off force test after production or use to detect the bonding strength and durability of the friction materials. At present, traditional press-off force test devices usually rely on a fixed loading method, which is difficult to adapt to brake pads of different shapes and degrees of wear. It is difficult to ensure the uniformity of force distribution and data accuracy during the test.

[0003] In the prior art, most testing devices are unable to effectively fit or replicate the shape of the brake pad surface. In particular, after the brake pad has been used for a period of time, surface wear or deformation may lead to uneven stress distribution during testing, thereby affecting the accuracy of the test results. In addition, the extrusion force of the loading device is often concentrated in a local area and fails to be evenly transmitted, resulting in poor repeatability of the test data, further reducing the test accuracy and reliability of the device.

[0004] Therefore, in view of the above technical problems, it is necessary to provide a brake pad friction material pressure-release force testing device. Summary of the invention

[0005] The object of the present invention is to provide a brake pad friction material press-off force testing device to solve the above-mentioned problem.

[0006] In order to achieve the above purpose, the technical solution provided by an embodiment of the present invention is as follows:

[0007] A brake pad friction material press-off force testing device comprises: a test bench, a positioning assembly, a driving assembly and a press-off assembly, the bottom end of the test bench is fixedly connected to a supporting base, and a test slot is opened at the top of the test bench, a brake pad is installed in the test slot, the top of the test bench is fixedly connected to a limit block, the top of the limit block is provided with a positioning assembly, the bottom side of the positioning assembly is provided with a driving assembly, and one side of the driving assembly is provided with a press-off assembly; the positioning assembly comprises a first electric push rod, the bottom end of the first electric push rod is fixedly connected to the top of the limit block, and one end of the first electric push rod is fixedly connected to a connecting rod, and one end of the connecting rod is fixedly connected to a second electric push rod; the driving assembly comprises a hydraulic rod, the top end of the hydraulic rod is fixedly connected to the bottom end of the connecting rod, the output end of the hydraulic rod is fixedly connected to a vertical connecting rod, and the output end of the vertical connecting rod is fixedly connected to a horizontal connecting rod; the press-off assembly comprises a pressure frame, one end of which is arranged on one side of the horizontal connecting rod.

[0008] As a further improvement of the present invention, the output end of the second electric push rod is fixedly connected to a fixing rod, the bottom end of the fixing rod is fixedly connected to a positioning platform, and a pair of mutually symmetrical positioning capsules are installed at the bottom end of the positioning platform.

[0009] As a further improvement of the present invention, a positioning liquid is provided in the positioning capsule, and the material of the positioning liquid is set to be an electrorheological fluid.

[0010] As a further improvement of the present invention, the limit block is surrounded by a limit ring that is slidably connected, one end of the limit ring is fixedly connected to the transverse rod, one end of the transverse rod is fixedly connected to an extrusion electric push rod, and the output end of the extrusion electric push rod is fixedly connected to the pressure frame.

[0011] As a further improvement of the present invention, a pair of mutually symmetrical accommodating frames are fixedly connected to the bottom end of the pressure frame, a compression pad is fixedly connected to the bottom end of the compression pad, and a plurality of evenly distributed moving rods are fixedly connected to the top end of the compression pad. The plurality of moving rods are slidably connected to the pressure frame, and the plurality of moving rods penetrate the pressure frame and extend to the outside of the pressure frame, and the diameters of the plurality of moving rods decrease successively from bottom to top.

[0012] As a further improvement of the present invention, an electric push rod is fixedly connected to the inner wall of the pressure frame, and an output end of the electric push rod is fixedly connected to a limiting sealing plate.

[0013] As a further improvement of the present invention, the limiting sealing plate is provided with a plurality of fixed half holes matching the moving rods, the inner walls of the fixed half holes are provided with friction pads, and the bottom ends of the fixed half holes are provided with sealing pads.

[0014] As a further improvement of the present invention, a storage box is installed on the inner wall of the pressure frame, and a filling liquid is provided in the storage box.

[0015] As a further improvement of the present invention, the material of the filling liquid is set to be a non-Newtonian fluid.

[0016] As a further improvement of the present invention, a pair of mutually symmetrical flow guide pipes are installed at the bottom end of the storage box, and the flow guide pipes are connected to the cavity formed by the containing frame and the extrusion pad.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] This solution can accurately reproduce the surface shape of the brake pad by combining the positioning capsule in the positioning component with the liquid-solid conversion characteristics of the electrorheological fluid, and transmit the deformation information to the extrusion pad through the multi-layer design of the moving rod and the extrusion pad, so as to achieve precise adaptation to the surface shape of the brake pad; using the flow and solidification characteristics of non-Newtonian fluids, the extrusion pad can provide uniform support force under the drive of the pressure frame, solving the problem of uneven stress distribution caused by surface wear or irregular shape; in addition, the sealing and recovery design of the limit sealing plate and the storage box ensures the stability and repeatability of the filling process, avoiding fluid leakage or waste. The synergistic effect of the overall structure significantly improves the adaptability, test accuracy and operating efficiency of the test device, and can meet the needs of pressure-release force testing under various working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the positioning component of the present invention;

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the driving component of the present invention;

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the press-release assembly of the present invention;

[0023] Figure 5 It is a schematic diagram of the front cross-sectional structure of the pressure frame of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the compression pad of the present invention.

[0025] Description of the numbers in the figure:

[0026] 1. Test bench; 2. Positioning assembly; 3. Driving assembly; 4. Press-off assembly; 11. Support base; 12. Test slot; 13. Brake pad; 14. Limit block; 21. First electric push rod; 22. Connecting rod; 23. Second electric push rod; 24. Fixed rod; 25. Positioning platform; 26. Positioning capsule; 31. Hydraulic rod; 32. Vertical connecting rod; 33. Limiting ring; 34. Horizontal connecting rod; 41. Pressure frame; 42. Accommodating frame; 43. Extrusion pad; 44. Moving rod; 45. Limiting sealing plate; 46. Storage box. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0028] The first implementation method:

[0029] See also Figure 1-6 A brake pad friction material press-off force test device comprises: a test bench 1, a positioning assembly 2, a driving assembly 3 and a press-off assembly 4, wherein the bottom end of the test bench 1 is fixedly connected to a support base 11, and a test slot 12 is provided at the top of the test bench 1, a brake pad 13 is installed in the test slot 12, a limit block 14 is fixedly connected to the top of the test bench 1, a positioning assembly 2 is provided at the top of the limit block 14, a driving assembly 3 is provided at the bottom side of the positioning assembly 2, and a press-off assembly 4 is provided at one side of the driving assembly 3; the positioning assembly 2 comprises a first electric push rod 21, the bottom end of the first electric push rod 21 is fixedly connected to the top end of the limit block 14, and one end of the first electric push rod 21 is fixedly connected to the connecting rod 22, and one end of the connecting rod 22 is fixedly connected to the second electric push rod 23; the driving component 3 includes a hydraulic rod 31, the top end of the hydraulic rod 31 is fixedly connected to the bottom end of the connecting rod 22, the output end of the hydraulic rod 31 is fixedly connected to the vertical connecting rod 32, and the output end of the vertical connecting rod 32 is fixedly connected to the horizontal connecting rod 34; the pressing and releasing component 4 includes a pressure frame 41, and one end of the pressure frame 41 is arranged on one side of the horizontal connecting rod 34.

[0030] Among them, the positioning capsule 26 in the positioning component 2 combined with the liquid-solid conversion characteristics of the electrorheological fluid can accurately reproduce the surface shape of the brake pad 13, and the deformation information is transmitted to the extrusion pad through the multi-layer design of the moving rod 44 and the extrusion pad 43, so as to achieve accurate adaptation to the surface shape of the brake pad; using the flow and solidification characteristics of the non-Newtonian fluid, the extrusion pad 43 can provide uniform support force under the drive of the pressure frame 41, solving the problem of uneven stress distribution caused by surface wear or irregular shape; in addition, the sealing and recovery design of the limit sealing plate 45 and the storage box 46 ensures the stability and repeatability of the filling process, and avoids fluid leakage or waste. The synergistic effect of the overall structure significantly improves the adaptability, test accuracy and operating efficiency of the test device, and can meet the requirements of compression and decompression force testing under various working conditions.

[0031] The output end of the second electric push rod 23 is fixedly connected with a fixing rod 24, the bottom end of the fixing rod 24 is fixedly connected with a positioning platform 25, the bottom end of the positioning platform 25 is installed with a pair of mutually symmetrical positioning capsules 26, and the positioning capsules 26 are provided with positioning liquid, and the material of the positioning liquid is set to be electrorheological fluid.

[0032] Among them, the output end of the second electric push rod 23 is fixedly connected to a fixed rod 24, the bottom end of the fixed rod 24 is fixedly connected to a positioning platform 25, and a pair of mutually symmetrical positioning capsules 26 are installed at the bottom end of the positioning platform 25. Positioning liquid is arranged in the positioning capsule 26, and the material of the positioning liquid is set to electrorheological fluid. The positioning capsule 26 is designed with a flexible capsule structure, and can accurately fit the surface shape of the brake pad 13 during the test. The electrorheological fluid serves as the core filling material of the positioning capsule 26, and has the characteristics of being liquid when stationary and quickly solidifying into a solid-like state after being acted upon by an electric field.

[0033] In actual use, when the positioning platform 25 drives the positioning capsule 26 to move and fit the surface of the brake pad 13, the electric field control system of the electrorheological fluid is started to change the positioning fluid from a liquid state to a solid state, thereby accurately recording the shape and wear state of the surface of the brake pad 13.

[0034] Through the liquid-solid conversion characteristics of the electrorheological fluid, the positioning capsule 26 can achieve high-precision replication of the surface shape of the brake pad 13, providing a reliable template for the subsequent shape adjustment of the squeeze pad 43. At the same time, the positioning capsule 26 adopts a relatively flexible capsule structure design, which can adapt to brake pads 13 of various shapes. Whether it is a brand new brake pad or a brake pad that has been worn after a period of use, it can achieve efficient adaptation of the surface shape in this way. In addition, the rapid solidification characteristics of the electrorheological fluid make the positioning process both accurate and efficient, reducing the test preparation time and further improving the overall operating efficiency and test accuracy of the device.

[0035] The limit block 14 is surrounded by a limit ring 33 which is slidably connected to it. One end of the limit ring 33 is fixedly connected to a transverse rod 34. One end of the transverse rod 34 is fixedly connected to an extrusion electric push rod. The output end of the extrusion electric push rod is fixedly connected to a pressure frame 41. A pair of mutually symmetrical accommodating frames 42 are fixedly connected to the bottom end of the pressure frame 41. An extrusion pad 43 is fixedly connected to the bottom end of the accommodating frame 42. A plurality of evenly distributed moving rods 44 are fixedly connected to the top end of the extrusion pad 43. The plurality of moving rods 44 are slidably connected to the pressure frame 41, and the plurality of moving rods 44 penetrate the pressure frame 41 and extend to the outside of the pressure frame 41. The diameters of the plurality of moving rods 44 decrease from bottom to top.

[0036] An electric push rod is fixedly connected to the inner wall of the pressure frame 41, and the output end of the electric push rod is fixedly connected to a limit sealing plate 45. The limit sealing plate 45 has a plurality of fixed half holes matching the moving rod 44. Friction pads are installed on the inner walls of the fixed half holes, and sealing pads are installed on the bottom ends of the fixed half holes.

[0037] A storage box 46 is installed on the inner wall of the pressure frame 41. A filling liquid is set in the storage box 46. The material of the filling liquid is set to be a non-Newtonian fluid. A pair of symmetrical guide pipes are installed at the bottom of the storage box 46. The guide pipes are connected to the cavity formed by the containing frame 42 and the extrusion pad 43.

[0038] Among them, the limit block 14 is surrounded by a sliding connection limit ring 33, and the limit ring 33 can limit the movement range of the transverse rod 34 during the sliding process, ensuring that the linkage between the transverse rod 34 and the extrusion electric push rod is more stable, thereby achieving precise positioning of the pressure frame 41. Through this sliding connection structure, the device can effectively avoid the problem of extrusion force deviation caused by lateral shaking during operation, thereby ensuring the stability and accuracy of the test process.

[0039] One end of the transverse rod 34 is fixedly connected to an extrusion electric push rod, and the output end of the extrusion electric push rod is fixedly connected to the pressure frame 41. This design can drive the pressure frame 41 to move in the vertical direction through the linear movement of the extrusion electric push rod, thereby realizing the layer-by-layer pressurization operation of the brake pad. Since the output force of the extrusion electric push rod is controllable and stable, the extrusion force during the test can be kept consistent, which helps to improve the repeatability and reliability of the press-release force test.

[0040] A pair of mutually symmetrical containing frames 42 are fixedly connected at the bottom of the pressure frame 41, and a compression pad 43 is fixedly connected at the bottom of the containing frame 42. The containing frame 42 is designed to define the boundary of the compression pad 43 to ensure that the non-Newtonian fluid does not lose control due to excessive flow during the filling process, and can provide additional support for the compression pad. The compression pad 43 can effectively disperse the pressure and simulate the stress state in actual work by fitting the surface shape of the brake pad.

[0041] A plurality of evenly distributed moving rods 44 are fixedly connected to the top of the extrusion pad 43. The plurality of moving rods 44 are slidably connected to the pressure frame 41, and the diameters of the moving rods 44 decrease from bottom to top. This design enables the moving rods 44 to slide flexibly inside the pressure frame 41. At the same time, the structure with gradually decreasing diameter can provide more precise force transmission under different pressures, ensuring that the shape adjustment of the extrusion pad is completely in fit with the surface of the brake pad. The uniform distribution of the moving rods further ensures the uniformity of stress distribution during the test.

[0042] An electric push rod is fixedly connected to the inner wall of the pressure frame 41, and the output end of the electric push rod is fixedly connected to a limit sealing plate 45. The limit sealing plate 45 has a plurality of fixed half holes matching the moving rod 44. A friction pad is installed on the inner wall of the fixed half hole, and a sealing pad is installed on the bottom end of the fixed half hole. The electric push rod can drive the limit sealing plate to press down to form a close contact with the surface of the moving rod 44. The design of the friction pad can fix the moving rod 44, and the sealing pad is used to ensure that the cavity formed by the containing frame and the extrusion pad is completely sealed to prevent leakage of the filling liquid, thereby effectively improving the sealing of the device and ensuring the stability of the non-Newtonian fluid filling process.

[0043] A storage box 46 is installed on the inner wall of the pressure frame 41. A filling liquid is arranged in the storage box 46. The filling liquid is made of a non-Newtonian fluid. A pair of mutually symmetrical guide tubes are installed at the bottom of the storage box 46. The guide tubes are connected to the cavity formed by the containing frame 42 and the squeeze pad 43. During the test, the non-Newtonian fluid is injected into the cavity of the squeeze pad through the guide tube. By utilizing the fluidity of the non-Newtonian fluid in a static state and the solid state characteristics under a stress state, the squeeze pad can flexibly adjust its shape and provide uniform support force when under stress. This can effectively solve the problem of uneven stress distribution caused by uneven wear on the brake pad surface and improve the accuracy and repeatability of the test data.

[0044] In order to ensure that the extrusion pad 43 can accurately replicate the deformation trend of the positioning capsule 26, the device limits the downward movement distance of the positioning capsule 26 to its own thickness, ensuring that the positioning capsule 26 is tightly attached to and squeezes the moving rod 44 to a reasonable position. In addition, after the positioning capsule 26 completes the extrusion, the position of the moving rod 44 is locked by the limiting sealing plate 45 to prevent rebound or displacement, and the cavity of the extrusion pad 43 is filled with a non-Newtonian fluid to further compensate for the insufficient deformation and enhance the supporting force. Combined with the pressure feedback control system, the entire process ensures that the deformation of the lower end of the extrusion pad 43 is consistent with the trend of the positioning capsule 26, thereby achieving accurate replication of the surface shape of the brake pad 13.

[0045] If you want to further improve the test accuracy and operating efficiency of the device, you can increase the density of the moving rods 44 and reduce their spacing to improve the resolution of deformation transfer, and add a flexible connecting gasket such as a silicone pad at the connection between the moving rods and the extrusion pads 43 to ensure that the shape change transfer is smoother and more natural; optimize the design of the guide tubes in the cavities of the containing frame 42 and the extrusion pad 43, and use a forked guide structure to achieve uniform distribution of the non-Newtonian fluid; add a fluid recovery pump to the storage box 46, and use reverse extraction to recover the fluid to reduce waste and facilitate cleaning; in addition, install a liquid level sensor and a viscosity sensor to monitor the state of the non-Newtonian fluid in real time to ensure that the fluid is always in optimal performance, thereby comprehensively improving the accuracy, reliability and ease of operation of the test device.

[0046] In summary, the device achieves smooth movement of the pressure frame 41 through the stable connection of the limit ring 33 and the cross rod 34 and other components, combined with the precise drive of the extrusion electric push rod. At the same time, the joint design of the accommodating frame 42, the extrusion pad 43 and the moving rod 44 enables the extrusion pad to be flexibly adjusted according to the surface shape of the brake pad. The filling of non-Newtonian fluid further enhances the uniformity and fit of the stress distribution. The sealing and filling design of the limit sealing plate 45 and the storage box 46 ensures the stability and repeatability of the entire filling process. Through the synergistic effect of this series of structures, the device can accurately and reliably complete the compression and release force test of the brake pad friction material, and has significant advantages in adaptability and test accuracy.

[0047] Working principle:

[0048] The device realizes a high-precision test of the press-release force of the friction material of the brake pad 13 through the coordinated action of the positioning component 2, the driving component 3 and the press-release component 4. First, the positioning component 2 drives the fixing rod 24 and the positioning platform 25 to move downward through the first electric push rod 21 and the second electric push rod 23, so that the positioning capsule 26 fits the surface of the brake pad 13; the electrorheological fluid in the positioning capsule 26 changes from liquid to solid under the action of the electric field, accurately replicating the surface shape of the brake pad 13, and then the driving component 3 drives the vertical connecting rod 32 and the horizontal connecting rod 34 to drive the extrusion electric push rod to move the pressure frame 41 in the vertical direction. The bottom of the pressure frame 41 is connected to the extrusion pad 43 through a plurality of evenly distributed moving rods 44. The moving rod 44 is pressed The non-Newtonian fluid in the storage box 46 is injected into the cavity formed by the extrusion pad 43 and the containing frame 42 through the guide tube, and the fluidity of the non-Newtonian fluid at rest and the solid characteristics after being stressed are used to provide uniform supporting force. The limiting sealing plate 45 is driven by the electric push rod to form a close contact with the surface of the moving rod 44 to ensure the deformation stability of the extrusion pad 43, and the rebound of the moving rod and the fluid leakage are avoided by the friction pad and the sealing pad. Finally, the pressure frame 41 is pressurized layer by layer by squeezing the electric push rod, and the extrusion pad 43 is tightly attached to the surface of the brake pad 13, so as to realize the accurate test of the pressing force of the brake pad friction material and ensure the uniformity of stress distribution and data repeatability.

[0049] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0050] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that those skilled in the art can understand.

Claims

1. A brake pad friction material pressure-release force testing device, characterized in that: include: A test bench (1), wherein a support base (11) is fixedly connected to the bottom end of the test bench (1), a test slot (12) is provided at the top end of the test bench (1), a brake pad (13) is installed in the test slot (12), a limit block (14) is fixedly connected to the top end of the test bench (1), a positioning component (2) is arranged at the top end of the limit block (14), a driving component (3) is arranged at the bottom side of the positioning component (2), and a pressing and releasing component (4) is arranged at one side of the driving component (3); A positioning assembly (2), the positioning assembly (2) comprising a first electric push rod (21), the bottom end of the first electric push rod (21) being fixedly connected to the top end of the limit block (14), one end of the first electric push rod (21) being fixedly connected to a connecting rod (22), one end of the connecting rod (22) being fixedly connected to a second electric push rod (23); A driving assembly (3), the driving assembly (3) comprising a hydraulic rod (31), the top end of the hydraulic rod (31) being fixedly connected to the bottom end of the connecting rod (22), the output end of the hydraulic rod (31) being fixedly connected to a vertical connecting rod (32), and the output end of the vertical connecting rod (32) being fixedly connected to a horizontal connecting rod (34); A press-off assembly (4), the press-off assembly (4) comprising a pressure frame (41), one end of the pressure frame (41) being arranged on one side of the transverse connecting rod (34).

2. A brake pad friction material pressure-release force testing device according to claim 1, characterized in that: The output end of the second electric push rod (23) is fixedly connected to a fixing rod (24), the bottom end of the fixing rod (24) is fixedly connected to a positioning platform (25), and a pair of mutually symmetrical positioning capsules (26) are installed at the bottom end of the positioning platform (25).

3. A brake pad friction material pressure-release force testing device according to claim 2, characterized in that: A positioning liquid is arranged in the positioning capsule (26), and the material of the positioning liquid is set to be an electrorheological fluid.

4. A brake pad friction material press-off force testing device according to claim 1, characterized in that: The limit block (14) is surrounded by a limit ring (33) which is slidably connected thereto. One end of the limit ring (33) is fixedly connected to a transverse connecting rod (34). One end of the transverse connecting rod (34) is fixedly connected to an extrusion electric push rod. The output end of the extrusion electric push rod is fixedly connected to a pressure frame (41).

5. The brake pad friction material pressure-release force testing device according to claim 1, characterized in that: The bottom end of the pressure frame (41) is fixedly connected to a pair of mutually symmetrical containing frames (42), the bottom end of the containing frame (42) is fixedly connected to a pressing pad (43), the top end of the pressing pad (43) is fixedly connected to a plurality of evenly distributed moving rods (44), the plurality of moving rods (44) are slidably connected to the pressure frame (41), and the plurality of moving rods (44) penetrate the pressure frame (41) and extend to the outside of the pressure frame (41), and the diameters of the plurality of moving rods (44) decrease from bottom to top.

6. A brake pad friction material press-off force testing device according to claim 1, characterized in that: An electric push rod is fixedly connected to the inner wall of the pressure frame (41), and an output end of the electric push rod is fixedly connected to a limiting sealing plate (45).

7. A brake pad friction material press-off force testing device according to claim 6, characterized in that: The position limiting sealing plate (45) is provided with a plurality of fixed half holes matching the moving rod (44), the inner walls of the fixed half holes are provided with friction pads, and the bottom ends of the fixed half holes are provided with sealing pads.

8. The brake pad friction material press-off force testing device according to claim 1, characterized in that: A storage box (46) is installed on the inner wall of the pressure frame (41), and a filling liquid is arranged in the storage box (46).

9. A brake pad friction material press-off force testing device according to claim 8, characterized in that: The material of the filling liquid is set to be a non-Newtonian fluid.

10. A brake pad friction material press-off force testing device according to claim 8, characterized in that: A pair of mutually symmetrical flow guide pipes are installed at the bottom end of the storage box (46), and the flow guide pipes are connected to the cavity formed by the containing frame (42) and the pressing pad (43).

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