A performance testing device and testing method for automobile brake shoe production

Abstract

The application relates to the technical field of brake shoe testing, and discloses a performance testing device and testing method for automobile brake shoe production, which comprises a base, a friction detector arranged at the top of the base, a detection shell fixedly connected to the top of the base, a detection assembly arranged in the detection shell, a simulation assembly arranged in the detection shell and a sand cleaning assembly arranged on the surface of the brake drum. Through the use of the detection assembly, the driving motor drives the brake drum to rotate through the rotating rod, the driving motor is turned off when the brake drum rotates to one end, the external air source is conveyed into the hydraulic cylinder through the gas conveying pipe, the bidirectional push head drives the brake shoe to contact the brake drum, the driving motor drives the driving drum to slowly rotate again, the driving drum drives the friction detector in the protective shell to test the abrasion of the brake shoe surface, and the friction test effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of brake shoe testing, in particular to a performance testing device and a testing method for automobile brake shoe production. Background Art

[0002] Drum brakes are an important component of new energy vehicles, and brake shoes are the friction components of drum brakes. In addition to having the strength and rigidity required as a component, they should also have the highest possible and most stable friction coefficient, as well as appropriate wear resistance, heat resistance, heat dissipation and heat capacity. The brake shoe squeezes and rubs the brake drum, causing the brake drum to convert the wheel from a rotating state to a stationary state.

[0003] Publication number CN118603593B discloses a braking performance testing device for automobile brakes, which relates to the technical field of automobile parts production. The device comprises a workbench on which a first positioning mechanism and a second positioning mechanism are provided. The first positioning mechanism is rotatably connected to a slider support. A speed measuring component is provided on the first positioning mechanism. The bottom end of the slider support is slidably connected to the workbench and can move closer to or away from the second positioning mechanism. The device also comprises a rotating support, and a plurality of support plates are distributed in an axial circular array at the top end of the rotating support. The second positioning mechanism is provided with a plurality of support plates, each of which is fixed on the support plates. The second positioning mechanism comprises a fixed seat and a second positioning block. The second positioning block is hinged to the fixed seat at one end away from the slider support and can be vertically flipped up and down.

[0004] Although the above-mentioned application and the prior art can perform batch testing on brake shoes, thereby improving the efficiency of testing, it is difficult to perform friction testing on the surface of the brake shoes when testing the brake shoes in the above-mentioned application and the prior art, and when performing friction testing on the brake shoes, it is impossible to simulate the friction test of the entire brake in a muddy and sandy environment, so that the friction test results of the brake shoes are not comprehensive. Moreover, after the brake shoes are tested with mud and sand, the mud and sand will adhere to the surface of the brake shoes. Then, when the detector tests the surface of the brake shoes, the presence of the mud and sand will cause deviations in the test results, thereby affecting the accuracy of the test results. Therefore, the present invention proposes a performance testing device and a testing method for the production of automobile brake shoes. Summary of the Invention

[0005] In response to the deficiencies in the prior art, the present invention provides a performance testing device and testing method for the production of automobile brake shoes, which have the advantages of friction testing, simulation testing and error avoidance. It solves the problem that when testing the brake shoe in the above-mentioned application and the prior art, it is difficult to perform friction testing on the surface of the brake shoe, and when performing friction testing on the brake shoe, it is impossible to simulate the friction test of the entire brake in a muddy and sandy environment, so that the friction test results of the brake shoe are not comprehensive. After the brake shoe is tested with mud and sand, the mud and sand will adhere to the surface of the brake shoe. Then, when the detector tests the surface of the brake shoe, the presence of mud and sand will cause deviations in the test results, thereby affecting the accuracy of the test results.

[0006] In order to achieve the above-mentioned purposes of friction testing, simulation testing and error avoidance, the present invention provides the following technical solutions: a performance testing device for automobile brake shoe production, comprising: a base, and a friction detector arranged on the top of the base,

[0007] A detection shell is fixedly connected to the top of the base, and a control panel is provided on the surface of the detection shell;

[0008] a detection assembly disposed inside the detection housing, the detection assembly comprising a brake drum rotatably connected to the detection housing and a brake shoe disposed inside the detection housing, a protective housing being fixedly connected to a surface of the brake drum, and the friction detector being disposed inside the protective housing;

[0009] A simulation component is provided inside the test housing and is used to simulate the wear caused by the contact between the brake shoe and gravel, thereby making the test results more multifaceted;

[0010] The sand cleaning component is arranged on the surface of the brake drum and is used to process the sand and gravel attached to the surface of the brake shoe to prevent the sand and gravel from adhering to the brake shoe and affecting the test results of the friction tester.

[0011] Furthermore, the detection assembly also includes a drive motor fixedly connected to the back of the detection shell, the output end of the drive motor is fixedly connected to a rotating rod, and the end of the rotating rod away from the drive motor is fixedly connected to the back of the brake drum.

[0012] Furthermore, the detection component also includes a limit plate arranged inside the brake drum through a support rod, the brake shoe is rotatably connected to the surface of the limit plate, a hydraulic cylinder is provided at one end of the brake shoe, and both ends of the interior of the hydraulic cylinder are slidably connected with a two-way push head, one end of the two-way push head is magnetically attracted to one end of the brake shoe, and the surface of the hydraulic cylinder is fixedly connected to an air supply pipe.

[0013] Furthermore, the simulation component includes a water tank fixedly connected to the inside of the detection shell, a suction pump fixedly connected to the top of the water tank, a water inlet pipe is provided at one end of the suction pump, the end of the water inlet pipe away from the suction pump is provided inside the water tank, a water outlet pipe is provided at the end of the suction pump away from the water inlet pipe, and the end of the water outlet pipe away from the suction pump is fixedly connected to a water spray head.

[0014] Furthermore, the simulation component includes a support frame fixedly connected to the inside of the detection shell, a sand and gravel box is fixedly connected to the bottom of the support frame, an electromagnetic valve is provided at the bottom of the sand and gravel box, and the sand and gravel box and the water spray head are both arranged inside the brake drum.

[0015] Furthermore, the sand cleaning assembly includes an operating box fixedly connected to the surface of the brake drum, and a blocking groove, an operating groove and a receiving groove are provided inside the operating box, and the blocking groove is connected to the receiving groove.

[0016] Furthermore, a fixing plate is fixedly connected inside the blocking groove, one end of the fixing plate is fixedly connected to a plurality of first springs, a blocking plate is slidably connected inside the blocking groove, and one end of the blocking plate is fixedly connected to one end of the plurality of first springs.

[0017] Furthermore, the interior of the operating groove is slidingly connected to a sliding plate, the surface of the sliding plate is fixedly connected to a pulling rope, the end of the pulling rope away from the sliding plate is fixedly connected to a counterweight ball, the surface of the sliding plate is fixedly connected to an extrusion strip, the end of the extrusion strip away from the sliding plate is fixedly connected to a sealing strip, the interior of the operating groove is fixedly connected to a support plate, the surface of the sliding plate is fixedly connected to a second spring, and the end of the second spring away from the sliding plate is fixedly connected to the back of the support plate.

[0018] Furthermore, a conveying cylinder is fixedly connected to the interior of the operating groove, a receiving block is fixedly connected to the interior of the receiving groove, the conveying cylinder and the receiving block are connected through a conveying pipe, the sealing strip is slidably connected to the interior of the conveying cylinder, a sealing plate is slidably connected to the interior of the receiving block, a push rod is fixedly connected to the back of the sealing plate, one end of the push rod is fixedly connected to the mounting plate, and a wire brush is fixedly connected to the back of the mounting plate.

[0019] The present invention also provides a performance testing method for automobile brake shoe production, which specifically includes the following steps:

[0020] Step 1: When performance testing is required, install the brake shoe inside the brake drum;

[0021] Step 2: Rotate the brake drum forward to make the brake shoe press against the brake drum. After the brake drum stops completely, test the surface of the brake shoe using a friction tester.

[0022] Step 3: To simulate the wear of the brake shoe in actual use, pour sand and gravel into the interior of the brake drum using the simulation component, and then test the surface of the brake shoe using the detection component;

[0023] Step 4: To prevent gravel from adhering to the surface of the brake shoe and affecting the test of the friction tester, reverse the brake drum so that the brake drum drives the sand cleaning assembly, which in turn removes the gravel from the surface of the brake shoe.

[0024] Compared with the prior art, the present invention provides a performance testing device and method for automobile brake shoe production, which has the following beneficial effects:

[0025] 1. The performance testing device and testing method for automobile brake shoe production, through the use of detection components, install the brake shoe inside the limit plate, then connect the air pipe with the external air source, start the drive motor, and the drive motor drives the brake drum to rotate through the rotating rod. When the brake drum rotates to a certain time, the drive motor is turned off, and the external air source is transported to the inside of the hydraulic cylinder through the air pipe, so that the two-way push head drives the brake shoe and brake drum to contact each other, and then stops the brake drum, and then restores the brake shoe to its initial state. The drive motor drives the drive drum to rotate slowly again, so that the drive drum drives the friction detector inside the protective shell to test the wear condition of the brake shoe surface, thereby achieving the effect of friction test.

[0026] 2. The performance testing device and testing method for automobile brake shoe production are based on the coordinated use of detection components and simulation components to start the water pump and drive motor. The water pump transports water from the water tank to the water outlet pipe through the water inlet pipe, and then drips it into the inside of the brake drum through the sprinkler head. At the same time, the drive motor drives the brake drum to rotate forward and reverse through the rotating rod, so that the brake drum can completely lay the water flow inside the brake drum. Then, the solenoid valve at the bottom of the gravel box is opened to make the gravel fall into the inside of the brake drum. The brake drum is rotated forward and reverse again to make the gravel roll and lay it inside the brake drum, thereby simulating the actual use environment, thereby achieving the effect of simulation test.

[0027] 3、The performance testing device and testing method for the automobile brake shoe production, through the cooperation of the detection assembly and the sand removal assembly, the driving motor drives the brake drum to reverse at high speed through the rotating rod, the brake drum drives the operation box to rotate at high speed, the operation box drives the blocking plate to retract and the counterweight ball to move through the centrifugal force generated by the high-speed rotation of the brake drum, the counterweight ball drives the sliding plate to move through the pulling rope, the sliding plate drives the sealing strip to move in the inside of the conveying cylinder through the extrusion strip, the liquid in the inside of the conveying cylinder is conveyed to the inside of the storage block through the conveying pipe, and then the sealing plate moves in the inside of the storage block, the sealing plate drives the mounting plate to move through the push rod in the moving process, the mounting plate drives the steel wire brush on the surface to contact the surface of the brake shoe, the rotation of the brake drum makes the steel wire brush clean the sandstone attached to the surface of the brake shoe, and then the subsequent friction detector is not affected to test the brake shoe, so that the error is avoided.

[0028] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the application. The objects and other advantages of the present application can be realized and attained by the structure particularly pointed out in the written description and the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application;

[0030] Figure 2 It is a schematic diagram of the three-dimensional structure of the detection shell of the present application;

[0031] Figure 3 It is a schematic diagram of the three-dimensional structure of the detection assembly of the present application;

[0032] Figure 4 It is a schematic diagram of the three-dimensional structure of the driving motor and the brake drum of the present application;

[0033] Figure 5 It is a schematic diagram of the three-dimensional structure of the limiting plate and the gas pipe of the present application;

[0034] Figure 6 It is a schematic diagram of the three-dimensional structure of the simulation assembly of the present application;

[0035] Figure 7 It is a schematic diagram of the three-dimensional structure of the operation box of the present application;

[0036] Figure 8 It is a schematic diagram of the three-dimensional structure of the fixed plate of the present application;

[0037] Figure 9 It is a schematic diagram of the three-dimensional structure of the inside structure of the operation box of the present application;

[0038] Figure 10 It is a schematic diagram of the three-dimensional structure of the sliding plate of the present application;

[0039] Figure 11 It is a schematic diagram of the three-dimensional structure of the sealing plate of the present invention.

[0040] In the figure: 1. Base; 11. Detection shell; 111. Control panel; 2. Detection assembly; 21. Drive motor; 211. Rotating rod; 22. Brake drum; 221. Protective shell; 23. Limit plate; 231. Brake shoe; 24. Air pipe; 241. Hydraulic cylinder; 242. Two-way push head; 3. Simulation assembly; 31. Water tank; 32. Suction pump; 321. Water inlet pipe; 322. Water outlet pipe; 323. Sprinkler head; 33. Support frame; 331. Sand Stone box; 4. Sand cleaning assembly; 41. Operation box; 411. Blocking groove; 412. Operation groove; 42. Fixed plate; 421. First spring; 422. Blocking plate; 43. Sliding plate; 431. Pull rope; 432. Counterweight ball; 433. Extrusion strip; 434. Sealing strip; 435. Second spring; 44. Support plate; 45. Conveying cylinder; 451. Conveying pipe; 46. Storage block; 461. Sealing plate; 462. Push rod; 463. Mounting plate. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] In the embodiments of the present application, any device or element referred to or implied must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "plurality" is two or more, unless otherwise specifically specified.

[0043] For specific embodiment 1, please refer to Figures 1 to 5 A performance testing device for automobile brake shoe production includes: a base 1, and a friction detector arranged on the top of the base 1,

[0044] The detection shell 11 is fixedly connected to the top of the base 1, and a control panel 111 is provided on the surface of the detection shell 11;

[0045] The detection assembly 2 is arranged in the inside of the detection shell 11, and the detection assembly 2 comprises a brake drum 22 rotatably connected to the inside of the detection shell 11 and a brake shoe 231 arranged in the inside of the detection shell 11, and the detection assembly 2 further comprises a driving motor 21 fixedly connected to the back of the detection shell 11, and the output end of the driving motor 21 is fixedly connected with a rotating rod 211, and the end of the rotating rod 211 away from the driving motor 21 is fixedly connected with the back of the brake drum 22, and the detection assembly 2 further comprises a limiting plate 23 arranged in the inside of the brake drum 22 through a support rod, and the brake shoe 231 is rotatably connected to the surface of the limiting plate 23, and one end of the brake shoe 231 is provided with a hydraulic cylinder 241, and both ends of the inside of the hydraulic cylinder 241 are slidably connected with a bidirectional push head 242, and one end of the bidirectional push head 242 is magnetically attracted to one end of the brake shoe 231, and the surface of the hydraulic cylinder 241 is fixedly communicated with a gas conveying pipe 24;

[0046] The simulation assembly 3 is arranged in the inside of the detection shell 11, and is used for simulating the abrasion caused by the contact between the brake shoe 231 and the sandstone, so that the test result is more diversified;

[0047] The sand removing assembly 4 is arranged on the surface of the brake drum 22, and is used for processing the sandstone attached to the surface of the brake shoe 231, so as to avoid that the sandstone attached to the brake shoe 231 affects the test result of the friction detector;

[0048] It should be noted that the surface of the brake drum 22 is fixedly connected with a red marker, the inner wall of the detection shell 11 is fixedly connected with a positioning detector, the rotating motor 21 can be forward and reverse rotated, and the rotating speed can be adjusted, and the inside of the base 1 is provided with a water receiving box, and the bottom of the detection shell 11 is provided with a water outlet;

[0049] When the brake shoe 231 needs to be detected, the brake shoe 231 is installed in the inside of the limiting plate 23, the top side of the rotating shoe 231 is magnetically attracted to the bidirectional push head 242, and the gas conveying pipe 24 is communicated with the gas source outside, the driving motor 21 is started through the control panel 111, the driving motor 21 drives the brake drum 22 to rotate through the rotating rod 211, the driving motor 21 is closed when the rotating speed of the brake drum 22 reaches a specified value, the gas conveying pipe 24 sends the gas source outside to the inside of the hydraulic cylinder 241, the gas drives the bidirectional push head 242 to drive the brake shoe 231 to rotate in the inside of the limiting plate 23, so that the brake shoe 231 extrudes the brake drum 22, at the same time, the positioning detector starts to record the position of the red marker, and when the brake drum 22 is completely stationary, the positioning detector records the position of the red marker again, the positions of the red markers are compared, so that the braking effect of the brake shoe 231 is tested, and the test result is sent to the inside of the control panel 111;

[0050] Specific embodiment two, please refer to Figures 1 to 5According to the performance testing device for automobile brake shoe production provided in the first embodiment, this embodiment further improves the technical solution:

[0051] The surface of the brake drum 22 is fixedly connected to a protective shell 221, and the friction detector is arranged inside the protective shell 221;

[0052] It should be noted that a third spring is fixedly connected between the two brake shoes 231;

[0053] When the wear degree of the brake shoe 231 needs to be tested, when the brake shoe 231 completes the brake test, the control panel 111 stops the external air source from being supplied to the interior of the hydraulic cylinder 241. Due to the presence of the third spring, the bidirectional push head 242 is accommodated inside the hydraulic cylinder 241, and drives the brake shoe 231 to return to its initial state. Then, the drive motor 21 is started again through the control panel 111. The drive motor 21 drives the brake drum 22 to rotate slowly forward through the rotating rod 211, so that the friction detector inside the protective shell 221 tests the wear condition of the surface of the brake shoe 231 by slowly rotating, and transmits the test result to the interior of the control panel 111.

[0054] For specific example three, please refer to Figures 1 to 6 According to the performance testing device for automobile brake shoe production provided in the second embodiment, this embodiment further improves the technical solution:

[0055] The simulation component 3 includes a water tank 31 fixedly connected to the inside of the detection shell 11, a suction pump 32 fixedly connected to the top of the water tank 31, a water inlet pipe 321 is provided at one end of the suction pump 32, an end of the water inlet pipe 321 away from the suction pump 32 is provided inside the water tank 31, an outlet pipe 322 is provided at the end of the suction pump 32 away from the water inlet pipe 321, and a water spray head 323 is fixedly connected to the end of the water outlet pipe 322 away from the suction pump 32. The simulation component 3 includes a support frame 33 fixedly connected to the inside of the detection shell 11, a sand and gravel box 331 is fixedly connected to the bottom of the support frame 33, an electromagnetic valve is provided at the bottom of the sand and gravel box 331, and the sand and gravel box 331 and the water spray head 323 are both arranged inside the brake drum 22;

[0056] It should be noted that the control panel 111 is electrically connected to the drive motor 21, the suction pump 32, the solenoid valve, the positioning detector, and the friction detector, and the driving motor 21, the suction pump 32, the solenoid valve, the positioning detector, and the friction detector are turned on and off by the data processing panel inside the control panel 111;

[0057] When it is necessary to test the wear of the brake shoe 231 in a real usage scenario, the suction pump 32 and the drive motor 21 are started through the control panel 111. The suction pump 32 draws water from the water tank 31 through the water inlet pipe 321 and transports it to the inside of the water spray head 323 through the water outlet pipe 322 and then sprays it out. As the brake drum 22 slowly rotates, the sprayed water is evenly distributed on the surface of the brake drum 22. Then, the suction pump 32 and the drive motor 21 are turned off through the control panel 111, and the solenoid valve at the bottom of the gravel box 331 is opened, so that the gravel inside the gravel box 331 falls into the inside of the brake drum 22. Then, the drive motor 21 is started again to make the brake drum 22 rotate forward and reverse. The gravel is laid inside the brake drum 22 through the intermittent forward and reverse rotation of the brake drum 22. Then, the brake shoe 231 is brought into contact with the brake drum 22 through the detection component 2 again, thereby obtaining the results of the braking test and wear test of the brake shoe 231.

[0058] For specific example 4, please refer to Figures 1 to 11 According to the performance testing device for automobile brake shoe production provided in the third embodiment, this embodiment further improves the technical solution:

[0059] The sand cleaning component 4 includes an operating box 41 fixedly connected to the surface of the brake drum 22, and a blocking groove 411, an operating groove 412 and a receiving groove are provided inside the operating box 41. The blocking groove 411 is connected to the receiving groove, and a fixed plate 42 is fixedly connected to the inside of the blocking groove 411. One end of the fixed plate 42 is fixedly connected to a plurality of first springs 421. The inside of the blocking groove 411 is slidably connected to a blocking plate 422. One end of the blocking plate 422 is fixedly connected to one end of the plurality of first springs 421. The inside of the operating groove 412 is slidably connected to a sliding plate 43. A pull rope 431 is fixedly connected to the surface of the sliding plate 43. The end of the pull rope 431 away from the sliding plate 43 is fixedly connected to a counterweight ball 432. The surface of the sliding plate 43 is fixedly connected to an extrusion bar 433. The extrusion bar 433 One end away from the sliding plate 43 is fixedly connected to a sealing strip 434, the inside of the operating groove 412 is fixedly connected to the support plate 44, the surface of the sliding plate 43 is fixedly connected to a second spring 435, the end of the second spring 435 away from the sliding plate 43 is fixedly connected to the back of the support plate 44, the inside of the operating groove 412 is fixedly connected to a conveying cylinder 45, the inside of the receiving groove is fixedly connected to a receiving block 46, the conveying cylinder 45 and the receiving block 46 are connected through a conveying pipe 451, the sealing strip 434 is slidably connected to the inside of the conveying cylinder 45, the inside of the receiving block 46 is slidably connected to a sealing plate 461, the back of the sealing plate 461 is fixedly connected to a pushing rod 462, one end of the pushing rod 462 is fixedly connected to a mounting plate 463, and the back of the mounting plate 463 is fixedly connected to a wire brush;

[0060] It should be noted that the inside of the delivery cylinder 45 and the delivery pipe 411 is provided with liquid for the movement of the sealing plate 461, and when the brake drum 22 rotates forward, the blocking plate 422 will not retract;

[0061] When it is necessary to prevent the surface of the brake shoe 231 from being attached to gravel and affecting the test results of the friction tester, the drive motor 21 is started through the control panel 111. The drive motor 21 drives the brake drum 22 to reverse at high speed through the rotating rod 211, so that the brake drum 22 drives the operating box 41 to rotate at high speed. The operating box 41 drives the blocking plate 422 to retract and the counterweight ball 432 to move through the centrifugal force generated by the high-speed rotation of the brake drum 22, so that the counterweight ball 432 drives the sliding plate 43 to move through the pulling rope 431, and the sliding plate 43 drives the sealing strip 433 through the extrusion strip 433. 34 moves inside the delivery cylinder 45, so that the liquid inside the delivery cylinder 45 is delivered to the inside of the receiving block 46 through the delivery pipe 451, thereby causing the sealing plate 461 to move inside the receiving block 46. During the movement, the sealing plate 461 drives the mounting plate 463 to move via the push rod 462, so that the mounting plate 463 drives the wire brush on its surface to contact the surface of the brake shoe 231. The rotation of the brake drum 22 causes the wire brush to clean the sand and gravel attached to the surface of the brake shoe 231, thereby not affecting the subsequent testing of the brake shoe 231 by the friction tester;

[0062] Specific embodiment 5, the present invention also provides a performance testing method for automobile brake shoe production, the automobile brake shoe performance testing method specifically comprises the following steps:

[0063] Step 1: When performance testing is required, install the brake shoe 231 inside the brake drum 22;

[0064] Step 2: Rotate the brake drum 22 forward to make the brake shoe 231 press against the brake drum 22. After the brake drum 22 stops completely, test the surface of the brake shoe 231 using a friction tester.

[0065] Step 3: When it is necessary to simulate the wear test of the brake shoe 231 in actual use scenarios, sand and gravel are poured into the interior of the brake drum 22 through the simulation component 3, and then the surface of the brake shoe 231 is tested through the detection component 2;

[0066] Step 4: When it is necessary to prevent gravel from adhering to the surface of the brake shoe 231 and affecting the test of the friction detector, the brake drum 22 is reversed so that the brake drum 22 drives the sand cleaning assembly 4, and the sand cleaning assembly 4 removes the gravel on the surface of the brake shoe 231.

[0067] Working principle: When in use, the brake shoe 231 is installed inside the limit plate 23, so that the top side of the rotating shoe 231 is magnetically attracted to the two-way push head 242, and the air supply pipe 24 is connected to the external air source. The drive motor 21 is started through the control panel 111, and the drive motor 21 drives the brake drum 22 to rotate through the rotating rod 211. When the speed of the brake drum 22 reaches a specified value, the drive motor 21 is turned off, and the air supply pipe 24 transmits the external air source to the inside of the hydraulic cylinder 241, so that the gas drives the brake shoe 231 to rotate inside the limit plate 23 through the two-way push head 242, and then the brake shoe 231 squeezes the brake drum 22. At the same time, the positioning detector starts to record the position of the red mark. When the brake drum 22 is completed When the brake shoe 231 is completely stationary, the positioning detector records the position of the red mark again, and compares the positions of the two red marks to test the braking effect of the brake shoe 231, and transmits the test results to the inside of the control panel 111. When the wear degree of the brake shoe 231 needs to be tested, when the brake shoe 231 completes the braking test, the external air source will no longer be transmitted to the inside of the hydraulic cylinder 241 through the control panel 111. Due to the presence of the third spring, the bidirectional push head 242 is accommodated in the inside of the hydraulic cylinder 241, and drives the brake shoe 231 to return to its initial state. Then, the drive motor 21 is started again through the control panel 111, and the drive motor 21 drives the brake drum 22 to rotate slowly forward through the rotating rod 211, so that the protective shell 22 The friction tester inside 1 tests the wear of the surface of the brake shoe 231 by slowly rotating, and transmits the test results to the inside of the control panel 111. When it is necessary to test the wear of the brake shoe 231 in a real use scenario, the suction pump 32 and the drive motor 21 are started through the control panel 111. The suction pump 32 draws water from the water tank 31 through the water inlet pipe 321, and transmits it to the inside of the water spray head 323 through the water outlet pipe 322 and then sprays it out. As the brake drum 22 slowly rotates, the sprayed water is evenly distributed on the surface of the brake drum 22. Then, the suction pump 32 and the drive motor 21 are turned off through the control panel 111, and the solenoid valve at the bottom of the gravel box 331 is opened, so that the gravel inside the gravel box 331 falls into the inside of the brake drum 22. , then start the drive motor 21 again to make the brake drum 22 rotate forward and reverse, and the intermittent forward and reverse rotation of the brake drum 22 makes the sand and gravel be laid inside the brake drum 22, and then the brake shoe 231 is brought into contact with the brake drum 22 through the detection component 2 again, thereby obtaining the results of the brake test and wear test of the brake shoe 231. When it is necessary to prevent the surface of the brake shoe 231 from being attached to the sand and gravel and affecting the test results of the friction detector, start the drive motor 21 through the control panel 111, and the drive motor 21 drives the brake drum 22 to rotate at high speed through the rotating rod 211, so that the brake drum 22 drives the operation box 41 to rotate at high speed, and the operation box 41 drives the blocking plate 422 to retract and the counterweight ball 432 to move through the centrifugal force generated by the high-speed rotation of the brake drum 22.The weighted ball 432 moves the sliding plate 43 by pulling the rope 431. The sliding plate 43 drives the sealing strip 434 to move inside the delivery cylinder 45 via the extrusion strip 433. The liquid inside the delivery cylinder 45 is transported to the inside of the storage block 46 through the delivery tube 451, thereby moving the sealing plate 461 inside the storage block 46. During the movement, the sealing plate 461 drives the mounting plate 463 to move via the push rod 462. The mounting plate 463 drives the wire brush on its surface to contact the surface of the brake shoe 231. The rotation of the brake drum 22 allows the wire brush to clean the sand and gravel attached to the surface of the brake shoe 231, thereby not affecting the subsequent friction tester test of the brake shoe 231.

[0068] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0069] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0070] Parallel: The parallel defined in this application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism, allowing for situations where the two sides are not absolutely parallel due to factors such as assembly tolerance, design tolerance, and the influence of structural flatness. Small angle errors are allowed. For example, within an assembly error range of 10 degrees, it can be understood as a parallel relationship.

[0071] Vertical: The vertical defined in this application is not limited to an absolute vertical intersection relationship (angle of 90 degrees). It allows for non-absolute vertical intersection relationships caused by factors such as assembly tolerance, design tolerance, and structural flatness. It allows for errors in a small angle range. For example, the assembly error range of 80 to 100 degrees can be understood as a vertical relationship.

[0072] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A performance testing device for automobile brake shoe production, comprising: A base (1), and a friction detector arranged on the top of the base (1), characterized in that: A detection shell (11) is fixedly connected to the top of the base (1), and a control panel (111) is provided on the surface of the detection shell (11); A detection assembly (2) is arranged inside the detection shell (11), the detection assembly (2) includes a brake drum (22) rotatably connected to the inside of the detection shell (11) and a brake shoe (231) arranged inside the detection shell (11), the surface of the brake drum (22) is fixedly connected to a protective shell (221), and the friction detector is arranged inside the protective shell (221); A simulation component (3) is arranged inside the detection shell (11) and is used to simulate the wear caused by the brake shoe (231) contacting with sand and gravel, thereby making the test results more multifaceted; A sand cleaning component (4) is arranged on the surface of the brake drum (22) and is used to process sand and gravel attached to the surface of the brake shoe (231) to prevent the sand and gravel from adhering to the brake shoe (231) and affecting the test results of the friction detector. The sand cleaning component (4) includes an operating box (41) fixedly connected to the surface of the brake drum (22). The interior of the operating box (41) is provided with a blocking groove (411), an operating groove (412) and a receiving groove. The blocking groove (411) is connected to the receiving groove. The interior of the operating groove (412) is slidably connected to a sliding plate (43). The surface of the sliding plate (43) is fixedly connected to a pulling rope (431). The end of the pulling rope (431) away from the sliding plate (43) is fixedly connected to a counterweight ball (432). The surface of the sliding plate (43) is fixedly connected to an extrusion bar (433). The end of the extrusion bar (433) away from the sliding plate (43) is fixedly connected to a A sealing strip (434) is fixedly connected to a support plate (44) inside the operating groove (412), a second spring (435) is fixedly connected to the surface of the sliding plate (43), and one end of the second spring (435) away from the sliding plate (43) is fixedly connected to the back of the support plate (44). A conveying cylinder (45) is fixedly connected to the inside of the operating groove (412), and a receiving block (46) is fixedly connected to the inside of the receiving groove. The conveying cylinder (45) and the receiving block (46) are connected through a conveying pipe (451). The sealing strip (434) is slidably connected to the inside of the conveying cylinder (45), and a sealing plate (461) is slidably connected to the inside of the receiving block (46). The back of the sealing plate (461) is fixedly connected to a push rod (462), one end of the push rod (462) is fixedly connected to a mounting plate (463), and the back of the mounting plate (463) is fixedly connected to a wire brush.

2. A performance testing device for automobile brake shoe production according to claim 1, characterized in that: The detection assembly (2) further comprises a drive motor (21) fixedly connected to the back of the detection housing (11), an output end of the drive motor (21) being fixedly connected to a rotating rod (211), and an end of the rotating rod (211) away from the drive motor (21) being fixedly connected to the back of the brake drum (22).

3. The performance testing device for automobile brake shoe production according to claim 1, characterized in that: The detection assembly (2) further comprises a limit plate (23) arranged inside the brake drum (22) via a support rod, the brake shoe (231) being rotatably connected to the surface of the limit plate (23), a hydraulic cylinder (241) being provided at one end of the brake shoe (231), both ends of the interior of the hydraulic cylinder (241) being slidably connected to a bidirectional push head (242), one end of the bidirectional push head (242) being magnetically attracted to one end of the brake shoe (231), and an air supply pipe (24) being fixedly connected to the surface of the hydraulic cylinder (241).

4. The performance testing device for automobile brake shoe production according to claim 1, characterized in that: The simulation component (3) comprises a water tank (31) fixedly connected to the inside of the detection shell (11); a suction pump (32) is fixedly connected to the top of the water tank (31); a water inlet pipe (321) is provided at one end of the suction pump (32); an end of the water inlet pipe (321) away from the suction pump (32) is provided inside the water tank (31); a water outlet pipe (322) is provided at one end of the suction pump (32) away from the water inlet pipe (321); and an end of the water outlet pipe (322) away from the suction pump (32) is fixedly connected to a water spray head (323).

5. The performance testing device for automobile brake shoe production according to claim 4, characterized in that: The simulation component (3) includes a support frame (33) fixedly connected to the inside of the detection shell (11), a sand and gravel box (331) fixedly connected to the bottom of the support frame (33), a solenoid valve is provided at the bottom of the sand and gravel box (331), and the sand and gravel box (331) and the water spray head (323) are both provided inside the brake drum (22).

6. The performance testing device for automobile brake shoe production according to claim 1, characterized in that: A fixing plate (42) is fixedly connected inside the blocking groove (411), one end of the fixing plate (42) is fixedly connected to a plurality of first springs (421), a blocking plate (422) is slidably connected inside the blocking groove (411), and one end of the blocking plate (422) is fixedly connected to one end of the plurality of first springs (421).

7. A performance testing method for automobile brake shoe production, characterized in that: Using a performance testing device for automobile brake shoe production according to any one of claims 1 to 6, the performance testing method for automobile brake shoe production specifically comprises the following steps: Step 1: When performance testing is required, the brake shoe (231) is installed inside the brake drum (22); Step 2: rotating the brake drum (22) forward so that the brake shoe (231) presses the brake drum (22). After the brake drum (22) stops completely, testing the surface of the brake shoe (231) using a friction tester; Step 3: When it is necessary to simulate the wear test of the brake shoe (231) in an actual use scenario, sand and gravel are poured into the interior of the brake drum (22) through the simulation component (3), and then the surface of the brake shoe (231) is tested through the detection component (2); Step 4: When it is necessary to prevent gravel from adhering to the surface of the brake shoe (231) and affecting the test of the friction detector, the brake drum (22) is reversed so that the brake drum (22) drives the sand cleaning component (4), and the sand cleaning component (4) removes the gravel on the surface of the brake shoe (231).

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