Shield tail brush fatigue test bench for detecting fatigue strength of shield tail brush

Abstract

The invention relates to the technical field of shield tail brush testing, and discloses a shield tail brush fatigue test bench for detecting the fatigue strength of a shield tail brush, which comprises a test shell, a shield tail brush is placed at the top of a fixed table, an electric telescopic rod is started, the electric telescopic rod drives a lifting block to move downwards, and the lifting block is in contact with a square plate in the downward moving process; a square plate drives a first rotating plate to move downwards and is limited by a sliding hole, the first rotating plate drives a sliding block to slide along the outer wall of the sliding hole, the sliding block drives second rotating plates to move, and in the process that the two second rotating plates are limited by a vertical rod and get close to each other, the second rotating plates drive a lifting plate to vertically descend along the outer wall of the vertical rod; the lifting plate drives the connecting rod to move downwards, the connecting rod drives the connecting plate to move downwards, the connecting plate drives the clamping block to move downwards, the clamping block can make contact with one end of the shield tail brush in the descending process, the top of the flat end of the shield tail brush is pressed, and one end of the shield tail brush is prevented from tilting in the bending test process.

Description

Technical Field

[0001] The invention relates to the technical field of shield tail brush testing, in particular to a shield tail brush fatigue test bench for detecting the fatigue strength of a shield tail brush. Background Art

[0002] The shield tail brush fatigue test bench is a device specially used to test the fatigue strength and service life of the shield tail brush (a brush device in the shield machine). It simulates the conditions of long-term operation of the shield tail brush in the actual working environment and performs repeated mechanical loading to evaluate its durability and performance under continuous use. Through these experiments, the service life of the shield tail brush can be predicted and potential fatigue damage can be discovered, thereby optimizing the design and material selection to ensure the smooth operation of the shield machine.

[0003] In the prior art, a reciprocating pressing method is usually used to test the bending of the shield tail brush. However, in this process, it is impossible to simulate the problem that the bristles of the shield tail brush will get stuck in the gaps of the rust blocks after cleaning the stubborn rust blocks for a long time, thus causing the working durability of the bristles of the shield tail brush. Summary of the invention

[0004] The purpose of the present invention is to provide a shield tail brush fatigue test bench for detecting the fatigue strength of the shield tail brush, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a shield tail brush fatigue test bench for detecting the fatigue strength of a shield tail brush, comprising a test shell, the top of the test shell is fixedly connected to a fixed platform, the top two sides of the fixed platform are respectively fixedly connected to vertical columns, the top of the vertical columns are fixedly connected to a top plate, and also comprises a shield tail brush test mechanism, the shield tail brush test mechanism comprises an electric telescopic rod fixedly connected to the top of the top plate, the movable end of the electric telescopic rod passes through the top plate and extends to the outside of the top plate, the bottom of the electric telescopic rod is fixedly connected to a lifting block, the inner walls at both ends of the lifting block are slidably connected to the outer wall of one end of the vertical column, the outer wall of one end of the vertical column close to the lifting block is slidably connected to a square plate, the bottom of the square plate is fixedly connected to a first spring, the bottom of the first spring is fixedly connected to the top of the fixed platform, and a clamping assembly is arranged on one side of the square plate.

[0006] Furthermore, the clamping assembly includes a first rotating plate rotatably connected to one side of the square plate, a sliding hole is opened on the top of the fixed platform, the end of the first rotating plate away from the square plate is rotatably connected to a sliding block, the outer wall of the sliding block is slidably connected to the inner wall of the sliding hole, the bottom of the sliding block is rotatably connected to a second rotating plate, the end of the second rotating plate away from the sliding block is rotatably connected to a lifting plate, and the inner wall of the lifting plate is slidably connected to a vertical rod.

[0007] Furthermore, the bottom of the vertical rod is fixedly connected to the bottom of the inner wall of the test shell, the bottom of the lifting plate is fixedly connected to the second spring, the bottom of the second spring is fixedly connected to the bottom of the inner wall of the test shell, and the top of the lifting plate is fixedly connected to the connecting rod.

[0008] Furthermore, one end of the connecting rod passes through the fixed platform and extends to the outside of the fixed platform, the top of the connecting rod is fixedly connected to a connecting plate, a side of the connecting plate close to the connecting rod is fixedly connected to a positioning block, and a shield tail brush is provided in contact with the top of the fixed platform.

[0009] Furthermore, an auxiliary component is provided on the top of the slider, and the auxiliary component includes a centering plate fixedly connected to the top of the slider, and slide grooves are respectively provided on both sides of the inner wall of the test shell, and a return spring is fixedly connected to the bottom of the inner wall of the slide groove, one end of the return spring is fixedly connected to a block, the outer wall of the block is slidably connected to the inner wall of the slide groove, a horizontal bar is fixedly connected between the two blocks, and an inclined plate is fixedly connected to one side of the horizontal bar, and the bottom of one end of the inclined plate contacts the top of the lifting plate.

[0010] Furthermore, a test assembly is provided at the bottom of the lifting block, and the test assembly includes a square shell fixedly connected to the bottom of the lifting block, a sliding plate is slidably connected to the inner wall of the square shell, a round rod is fixedly connected to the bottom of the sliding plate, the bottom of the round rod is fixedly connected to the test block, and extrusion springs are respectively fixedly connected to the top of the inner wall of the square shell.

[0011] Furthermore, a telescopic assembly is arranged on the top of the sliding plate, and the telescopic assembly comprises a rotating bar rotatably connected to the top of the sliding plate, and one end of the rotating bar away from the sliding plate is rotatably connected to a moving block, and a square groove is opened at the center of the top of the inner wall of the square shell.

[0012] Furthermore, the outer wall of the moving block is slidably connected to the inner wall of the square groove, one side of the moving block is fixedly connected to a cross bar, one side of the outer wall of the square shell is fixedly connected to a fixed shell, and one end of the cross bar passes through the square shell and extends to the inside of the fixed shell.

[0013] Furthermore, one end of the cross bar away from the moving block is fixedly connected to a moving plate, the outer wall of the moving plate is slidably connected to the inner wall of the fixed shell, one side of the moving plate away from the cross bar is fixedly connected to a plurality of moving rods, one end of the moving rod passes through the fixed shell and extends to the outside of the fixed shell, and one end of the moving rod away from the moving plate is fixedly connected to a hexagonal block.

[0014] The present invention has the following beneficial effects: (1) In the present invention, a shield tail brush is placed on the top of a fixed platform, and an electric telescopic rod is started. The electric telescopic rod drives the lifting block to move downward. During the downward movement of the lifting block, the lifting block will contact the square plate. The square plate drives the first rotating plate to move downward. The first rotating plate drives the slider to slide along the outer wall of the sliding hole. The slider drives the second rotating plate to move. During the process of the two second rotating plates approaching each other, the second rotating plate drives the lifting plate to vertically descend along the outer wall of the vertical rod. The lifting plate drives the connecting rod to move downward. The connecting rod drives the connecting plate to move downward. The connecting plate drives the positioning block to move downward. During the descent of the positioning block, the lifting block will contact one end of the shield tail brush and press the top of the flat end of the shield tail brush to prevent one end of the shield tail brush from tilting during the bending test. At the same time, the lifting block drives the square shell to move downward. The square shell drives the sliding plate to move downward. The sliding plate drives the round rod to move downward. The round rod drives the test block to move downward. During the downward movement of the test block, the inclined end of the shield tail brush will be pressed downward, so that the inclined end of the shield tail brush is tested for bending.

[0015] (2) In the present invention, when the slider moves, the slider drives the centering plate to move, and the two centering plates approach each other. During the movement of the two centering plates, they will contact the outer walls of the shield tail brush on both sides. The centering plate clamps the shield tail brush, so that the shield tail brush is always in the center during the bending test, preventing the position of the shield tail brush from shifting during the test, thereby improving the accuracy of the bending test. When the test block contacts the shield tail brush, it is subjected to the reaction force of the shield tail brush, causing the test block to drive the round rod to move upward, and the round rod drives the sliding plate to The sliding plate drives the rotating bar to move inside the square shell, and due to the setting of the square groove, the rotating bar drives the moving block to move along the outer wall of the square groove, and the moving block drives the cross bar to move, and the cross bar drives the moving plate to move, and the moving plate drives the moving rod to move, and the moving rod drives the hexagonal block to move. During the movement of the hexagonal block, the bristles of the shield tail brush will come into contact and squeeze the bristles of the shield tail brush, and the shield tail brush is tested to see how much curvature the shield tail brush can withstand, thereby improving the diversity of the device in testing the curvature of the shield tail brush.

[0016] (3) In the present invention, when the test block continues to move downward until it is separated from the shield tail brush, it is elastically deformed by the extrusion spring, and the extrusion spring presses down the sliding plate, and the sliding plate drives the rotating bar to move downward, and the rotating bar drives the moving block to move toward the end away from the fixed shell, and the moving block drives the cross bar to move, and the cross bar drives the moving plate to move, and the moving plate drives the moving rod to move, and the moving rod drives the hexagonal block to move. At this time, the hexagonal block is located inside the bristles of the shield tail brush. When one end of the hexagonal block is in contact with the side wall of the fixed shell, the clamping force generated can clamp the bristles of the shield tail brush. When the electric telescopic rod drives the lifting block to move upward, it will pull the bristles of the shield tail brush, thereby simulating the process of the shield tail brush cleaning the stubborn rust blocks with the bristles, and testing the working durability of the shield tail brush bristles.

[0017] (4) According to the present invention, when the test block moves downward and separates from the shield tail brush, the bottom of the test block will come into contact with the top of the horizontal bar, and the test block will squeeze the horizontal bar to move downward, and the horizontal bar will drive the inclined plate to move downward. When the inclined plate moves downward, it will come into contact with the top of the lifting plate, causing the lifting plate to move slightly downward. The lifting plate will drive the connecting rod to move slightly downward, the connecting rod will drive the connecting plate to move slightly downward, and the connecting plate will drive the positioning block to move slightly downward. When the positioning block moves slightly downward, it can further pressurize the top of the shield tail brush, thereby further improving the stability of the shield tail brush during the test, and indirectly improving the accuracy of the device for testing the shield tail brush.

[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall front structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the test shell of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the shield tail brush of the present invention; Figure 5 This is a schematic diagram of the structure of the test block of the present invention when viewed from above; Figure 6 For the present invention Figure 2 A magnified view of middle; Figure 7 For the present invention Figure 3 Enlarged view of middle B; Figure 8 For the present invention Figure 4 Enlarged view of C in the middle.

[0021] In the accompanying drawings, the components represented by the reference numerals are listed as follows: In the figure: 1, test shell; 2, fixed platform; 3, vertical column; 4, top plate; 5, shield tail brush test mechanism; 51, electric telescopic rod; 52, lifting block; 53, first spring; 54, square plate; 55, clamping assembly; 56, auxiliary assembly; 57, test assembly; 58, telescopic assembly; 551, first rotating plate; 552, sliding hole; 553, sliding block; 554, second rotating plate; 555, lifting plate; 556, second spring; 557, vertical rod; 558, connecting rod; 559 , connecting plate; 5510, positioning block; 5511, shield tail brush; 561, centering plate; 562, slide groove; 563, block; 564, return spring; 565, horizontal bar; 566, inclined plate; 571, square shell; 572, sliding plate; 573, round rod; 574, test block; 575, extrusion spring; 581, rotating bar; 582, square groove; 583, moving block; 584, horizontal bar; 585, fixed shell; 586, moving plate; 587, moving rod; 588, hexagonal block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1, please refer to Figure 1 - Figure 8 As shown, the present invention is a shield tail brush fatigue test bench for detecting the fatigue strength of the shield tail brush, comprising a test shell 1, a fixed platform 2 is fixedly connected to the top of the test shell 1, vertical columns 3 are fixedly connected to both sides of the top of the fixed platform 2, and a top plate 4 is fixedly connected to the top of the vertical column 3, and further comprising; The shield tail brush test mechanism 5 includes an electric telescopic rod 51 fixedly connected to the top of the top plate 4, the movable end of the electric telescopic rod 51 passes through the top plate 4 and extends to the outside of the top plate 4, the bottom of the electric telescopic rod 51 is fixedly connected with a lifting block 52, the inner walls at both ends of the lifting block 52 are slidably connected to the outer wall of one end of the vertical column 3, the outer wall of one end of the vertical column 3 close to the lifting block 52 is slidably connected with a square plate 54, the bottom of the square plate 54 is fixedly connected with a first spring 53, the purpose of this arrangement is to facilitate resetting, the bottom of the first spring 53 is fixedly connected to the top of the fixed platform 2, and a clamping assembly 55 is provided on one side of the square plate 54.

[0024] The clamping assembly 55 includes a first rotating plate 551 rotatably connected to one side of the square plate 54, a sliding hole 552 is provided on the top of the fixed platform 2, and the end of the first rotating plate 551 away from the square plate 54 is rotatably connected to a slider 553, and the outer wall of the slider 553 is slidably connected to the inner wall of the sliding hole 552. The setting of the sliding hole 552 is to limit the moving trajectory of the slider 553, and the bottom of the slider 553 is rotatably connected to a second rotating plate 554, and the end of the second rotating plate 554 away from the slider 553 is rotatably connected to a lifting plate 555, and the inner wall of the lifting plate 555 is slidably connected to a vertical rod 557.

[0025] The bottom of the vertical rod 557 is fixedly connected to the bottom of the inner wall of the test shell 1, the bottom of the lifting plate 555 is fixedly connected to the second spring 556, the bottom of the second spring 556 is fixedly connected to the bottom of the inner wall of the test shell 1, and the top of the lifting plate 555 is fixedly connected to the connecting rod 558.

[0026] One end of the connecting rod 558 passes through the fixed platform 2 and extends to the outside of the fixed platform 2. The top of the connecting rod 558 is fixedly connected with a connecting plate 559. The side of the connecting plate 559 close to the connecting rod 558 is fixedly connected with a positioning block 5510. The top of the fixed platform 2 is provided with a shield tail brush 5511. The shield tail brush 5511 is placed on the top of the fixed platform 2, and the electric telescopic rod 51 is started. The electric telescopic rod 51 drives the lifting block 52 to move downward. During the downward movement of the lifting block 52, it will contact the square plate 54. The square plate 54 drives the first rotating plate 551 to move downward. It is limited by the sliding hole 552. The first rotating plate 551 drives the slider 553 along the sliding hole 552. The outer wall slides, and the slider 553 drives the second rotating plate 554 to move. Limited by the vertical rod 557, when the two second rotating plates 554 approach each other, the second rotating plate 554 drives the lifting plate 555 to vertically descend along the outer wall of the vertical rod 557, and the lifting plate 555 drives the connecting rod 558 to move downward, and the connecting rod 558 drives the connecting plate 559 to move downward, and the connecting plate 559 drives the positioning block 5510 to move downward. During the descending process of the positioning block 5510, it will contact one end of the shield tail brush 5511, press the flat end top of the shield tail brush 5511, and prevent one end of the shield tail brush 5511 from tilting during the bending test.

[0027] The top of the slider 553 is provided with an auxiliary component 56, and the auxiliary component 56 includes a centering plate 561 fixedly connected to the top of the slider 553. When the slider 553 moves, the slider 553 drives the centering plate 561 to move, and the two centering plates 561 approach each other. During the movement of the two centering plates 561, they will contact the outer walls of the two sides of the shield tail brush 5511. The centering plate 561 clamps the shield tail brush 5511, so that the shield tail brush 5511 is always in the center during the bending test, so as to prevent the shield tail brush 5511 from being bent during the test. The position of the shield tail brush 5511 is offset, which improves the accuracy of the bending test. Slide grooves 562 are respectively provided on both sides of the inner wall of the test shell 1. A return spring 564 is fixedly connected to the bottom of the inner wall of the slide groove 562. One end of the return spring 564 is fixedly connected to a block 563. The outer wall of the block 563 is slidably connected to the inner wall of the slide groove 562. A horizontal bar 565 is fixedly connected between the two blocks 563. An inclined plate 566 is fixedly connected to one side of the horizontal bar 565. The bottom of one end of the inclined plate 566 contacts the top of the lifting plate 555.

[0028] A test assembly 57 is provided at the bottom of the lifting block 52, and the test assembly 57 includes a square shell 571 fixedly connected to the bottom of the lifting block 52, a sliding plate 572 is slidably connected to the inner wall of the square shell 571, a round rod 573 is fixedly connected to the bottom of the sliding plate 572, a test block 574 is fixedly connected to the bottom of the round rod 573, and an extrusion spring 575 is fixedly connected to the top of the inner wall of the square shell 571 on both sides of the top of the sliding plate 572, and the top of the extrusion spring 575 is fixedly connected to the top of the inner wall of the square shell 571. The lifting block 52 drives the square shell 571 to move downward, the square shell 571 drives the sliding plate 572 to move downward, the sliding plate 572 drives the round rod 573 to move downward, and the round rod 573 drives the test block 574 to move downward. During the downward movement of the test block 574, the inclined end of the shield tail brush 5511 will be pressed down to test the bending of the inclined end of the shield tail brush 5511.

[0029] In embodiment 2, a telescopic assembly 58 is provided at the top of the sliding plate 572, and the telescopic assembly 58 includes a rotating bar 581 rotatably connected to the top of the sliding plate 572, and the end of the rotating bar 581 away from the sliding plate 572 is rotatably connected to a moving block 583, and a square groove 582 is opened at the center of the top of the inner wall of the square shell 571.

[0030] The outer wall of the moving block 583 is slidably connected to the inner wall of the square groove 582, a cross bar 584 is fixedly connected to one side of the moving block 583, a fixed shell 585 is fixedly connected to one side of the outer wall of the square shell 571, and one end of the cross bar 584 passes through the square shell 571 and extends to the interior of the fixed shell 585.

[0031] One end of the cross bar 584 away from the moving block 583 is fixedly connected to a moving plate 586, and the outer wall of the moving plate 586 is slidably connected to the inner wall of the fixed shell 585. A side of the moving plate 586 away from the cross bar 584 is fixedly connected to a plurality of moving rods 587, one end of the moving rod 587 penetrates the fixed shell 585 and extends to the outside of the fixed shell 585, and one end of the moving rod 587 away from the moving plate 586 is fixedly connected to a hexagonal block 588, which is subjected to the reaction force of the shield tail brush 5511, so that the test block 574 drives the round rod 573 to move upward, and the round rod 573 drives the sliding plate 572 to move toward the inside of the square shell 571, and the sliding plate 572 moves to the inside of the square shell 571. 72 drives the rotating bar 581 to move toward the inside of the square shell 571. Due to the setting of the square groove 582, the rotating bar 581 drives the moving block 583 to move along the outer wall of the square groove 582. The moving block 583 drives the cross bar 584 to move. The cross bar 584 drives the moving plate 586 to move. The moving plate 586 drives the moving rod 587 to move. The moving rod 587 drives the hexagonal block 588 to move. During the movement of the hexagonal block 588, it will come into contact with the bristles of the shield tail brush 5511 and squeeze the bristles of the shield tail brush 5511 to test how much bending the shield tail brush 5511 can withstand in brushing work.

[0032] When in use, place the shield tail brush 5511 on the top of the fixed platform 2, start the electric telescopic rod 51, the electric telescopic rod 51 drives the lifting block 52 to move downward, the lifting block 52 will contact the square plate 54 during the downward movement, the square plate 54 drives the first rotating plate 551 to move downward, limited by the sliding hole 552, the first rotating plate 551 drives the slider 553 to slide along the outer wall of the sliding hole 552, the slider 553 drives the second rotating plate 554 to move, limited by the vertical rod 557, the two second rotating plates 554 approach each other, the second rotating plate 554 drives the lifting plate 555 to vertically descend along the outer wall of the vertical rod 557, the lifting plate 555 drives the connecting rod 558 to move downward , the connecting rod 558 drives the connecting plate 559 to move downward, and the connecting plate 559 drives the positioning block 5510 to move downward. During the descent process, the positioning block 5510 will contact one end of the shield tail brush 5511, and press the top of the flat end of the shield tail brush 5511 to prevent one end of the shield tail brush 5511 from tilting during the bending test. At the same time, the lifting block 52 drives the square shell 571 to move downward, the square shell 571 drives the sliding plate 572 to move downward, the sliding plate 572 drives the round rod 573 to move downward, and the round rod 573 drives the test block 574 to move downward. During the downward movement of the test block 574, the inclined end of the shield tail brush 5511 will be pressed downward, so that the inclined end of the shield tail brush 5511 is tested for bending.

[0033] When the slider 553 moves, the slider 553 drives the centering plate 561 to move, and the two centering plates 561 approach each other. During the movement of the two centering plates 561, they will contact the outer walls of the shield tail brush 5511 on both sides. The centering plate 561 clamps the shield tail brush 5511, so that the shield tail brush 5511 is always in the center during the bending test, preventing the position of the shield tail brush 5511 from shifting during the test, thereby improving the accuracy of the bending test. When the test block 574 contacts the shield tail brush 5511, the reaction force of the shield tail brush 5511 is applied, so that the test block 574 drives the round rod 573 to move upward, and the round rod 573 drives the sliding plate 572 to move into the interior of the square shell 571. The sliding plate 572 drives the rotating bar 581 to move toward the inside of the square shell 571. Affected by the setting of the square groove 582, the rotating bar 581 drives the moving block 583 to move along the outer wall of the square groove 582. The moving block 583 drives the cross bar 584 to move. The cross bar 584 drives the moving plate 586 to move. The moving plate 586 drives the moving rod 587 to move. The moving rod 587 drives the hexagonal block 588 to move. During the movement of the hexagonal block 588, it will come into contact with the bristles of the shield tail brush 5511 and squeeze the bristles of the shield tail brush 5511. The test is to see how much curvature the shield tail brush 5511 can withstand, thereby improving the diversity of the device in testing the curvature of the shield tail brush 5511.

[0034] When the test block 574 continues to move downward until it is separated from the shield tail brush 5511, it is elastically deformed by the extrusion spring 575, and the extrusion spring 575 presses down the sliding plate 572, and the sliding plate 572 drives the rotating bar 581 to move downward, and the rotating bar 581 drives the moving block 583 to move toward the end away from the fixed shell 585, and the moving block 583 drives the cross bar 584 to move, and the cross bar 584 drives the moving plate 586 to move, and the moving plate 586 drives the moving rod 587 to move, and the moving rod 587 drives the hexagonal block 588 to move. At this time, the hexagonal block 588 is located inside the bristles of the shield tail brush 5511. When one end of the hexagonal block 588 fits against the side wall of the fixed shell 585, the clamping force generated can clamp the bristles of the shield tail brush 5511. When the electric telescopic rod 51 drives the lifting block 52 to move upward, the bristles of the shield tail brush 5511 will be pulled, thereby simulating the process of the shield tail brush 5511 cleaning the stubborn rust blocks with the bristles, and testing the working durability of the bristles of the shield tail brush 5511.

[0035] When the test block 574 moves downward and separates from the shield tail brush 5511, the bottom of the test block 574 will contact the top of the horizontal bar 565, and the test block 574 will squeeze the horizontal bar 565 to move downward, and the horizontal bar 565 will drive the inclined plate 566 to move downward, and the inclined plate 566 will contact the top of the lifting plate 555 when moving downward, so that the lifting plate 555 will move slightly downward, and the lifting plate 555 will drive the connecting rod 558 to move slightly downward, and the connecting rod 558 will drive the connecting plate 559 to move slightly downward, and the connecting plate 559 will drive the positioning block 5510 to move slightly downward, and the positioning block 5510 can further pressurize the top of the shield tail brush 5511 when it moves slightly downward, so as to further improve the stability of the shield tail brush 5511 during the test, and improve the accuracy of the device in testing the shield tail brush 5511.

[0036] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A shield tail brush fatigue test bench for testing the fatigue strength of a shield tail brush, comprising a test shell (1), Features: The top of the test shell (1) is fixedly connected to a fixing platform (2), the top two sides of the fixing platform (2) are respectively fixedly connected to vertical columns (3), the top of the vertical columns (3) are fixedly connected to a top plate (4), and further comprises: A shield tail brush test mechanism (5), the shield tail brush test mechanism (5) comprising an electric telescopic rod (51) fixedly connected to the top of a top plate (4), the movable end of the electric telescopic rod (51) passing through the top plate (4) and extending to the outside of the top plate (4), the bottom of the electric telescopic rod (51) being fixedly connected to a lifting block (52), the inner walls at both ends of the lifting block (52) being slidably connected to the outer wall of one end of a vertical column (3), the outer wall of one end of the vertical column (3) close to the lifting block (52) being slidably connected to a square plate (54), the bottom of the square plate (54) being fixedly connected to a first spring (53), the bottom of the first spring (53) being fixedly connected to the top of a fixed platform (2), and a clamping assembly (55) being provided on one side of the square plate (54).

2. A shield tail brush fatigue test bench for detecting the fatigue strength of a shield tail brush according to claim 1, Features: The clamping assembly (55) comprises a first rotating plate (551) rotatably connected to one side of the square plate (54); a sliding hole (552) is provided on the top of the fixed platform (2); an end of the first rotating plate (551) away from the square plate (54) is rotatably connected to a sliding block (553); an outer wall of the sliding block (553) is slidably connected to an inner wall of the sliding hole (552); a second rotating plate (554) is rotatably connected to the bottom of the sliding block (553); an end of the second rotating plate (554) away from the sliding block (553) is rotatably connected to a lifting plate (555); and an inner wall of the lifting plate (555) is slidably connected to a vertical rod (557).

3. A shield tail brush fatigue test bench for detecting the fatigue strength of a shield tail brush according to claim 2, Features: The bottom of the vertical rod (557) is fixedly connected to the bottom of the inner wall of the test shell (1), the bottom of the lifting plate (555) is fixedly connected to a second spring (556), the bottom of the second spring (556) is fixedly connected to the bottom of the inner wall of the test shell (1), and the top of the lifting plate (555) is fixedly connected to a connecting rod (558).

4. A shield tail brush fatigue test bench for detecting the fatigue strength of a shield tail brush according to claim 3, Features: One end of the connecting rod (558) passes through the fixed platform (2) and extends to the outside of the fixed platform (2); a connecting plate (559) is fixedly connected to the top of the connecting rod (558); a locking block (5510) is fixedly connected to a side of the connecting plate (559) close to the connecting rod (558); and a shield tail brush (5511) is provided in contact with the top of the fixed platform (2).

5. A shield tail brush fatigue test bench for detecting the fatigue strength of a shield tail brush according to claim 4, Features: An auxiliary component (56) is provided at the top of the slider (553), and the auxiliary component (56) includes a centering plate (561) fixedly connected to the top of the slider (553). Slide grooves (562) are respectively provided on both sides of the inner wall of the test shell (1). A return spring (564) is fixedly connected to the bottom of the inner wall of the slide groove (562), and one end of the return spring (564) is fixedly connected to a block (563). The outer wall of the block (563) is slidably connected to the inner wall of the slide groove (562). A horizontal bar (565) is fixedly connected between the two blocks (563), and an inclined plate (566) is fixedly connected to one side of the horizontal bar (565). The bottom of one end of the inclined plate (566) contacts the top of the lifting plate (555).

6. A shield tail brush fatigue test bench for detecting the fatigue strength of a shield tail brush according to claim 5, Features: A test assembly (57) is provided at the bottom of the lifting block (52), and the test assembly (57) comprises a square shell (571) fixedly connected to the bottom of the lifting block (52); a sliding plate (572) is slidably connected to the inner wall of the square shell (571); a round rod (573) is fixedly connected to the bottom of the sliding plate (572); a test block (574) is fixedly connected to the bottom of the round rod (573); and compression springs (575) are respectively fixedly connected to the top of the inner wall of the square shell (571).

7. A shield tail brush fatigue test bench for detecting the fatigue strength of a shield tail brush according to claim 6, Features: A telescopic assembly (58) is provided at the top of the sliding plate (572), and the telescopic assembly (58) comprises a rotating bar (581) rotatably connected to the top of the sliding plate (572), and one end of the rotating bar (581) away from the sliding plate (572) is rotatably connected to a moving block (583), and a square groove (582) is provided at the center of the top of the inner wall of the square shell (571).

8. A shield tail brush fatigue test bench for detecting the fatigue strength of a shield tail brush according to claim 7, Features: The outer wall of the moving block (583) is slidably connected to the inner wall of the square groove (582); a cross bar (584) is fixedly connected to one side of the moving block (583); a fixed shell (585) is fixedly connected to one side of the outer wall of the square shell (571); and one end of the cross bar (584) passes through the square shell (571) and extends to the interior of the fixed shell (585).

9. A shield tail brush fatigue test bench for detecting the fatigue strength of a shield tail brush according to claim 8, Features: One end of the cross bar (584) away from the moving block (583) is fixedly connected to a moving plate (586); the outer wall of the moving plate (586) is slidably connected to the inner wall of the fixed shell (585); one side of the moving plate (586) away from the cross bar (584) is fixedly connected to a plurality of moving rods (587); one end of the moving rod (587) penetrates the fixed shell (585) and extends to the outside of the fixed shell (585); and one end of the moving rod (587) away from the moving plate (586) is fixedly connected to a hexagonal block (588).

Images