Pin sleeve wear resistance coupling testing machine

Abstract

The invention relates to the technical field of pin sleeve wear resistance test, and discloses a pin sleeve wear resistance coupling test machine, comprising a base plate, a positioning seat is fixed on the base plate, an arc-shaped slot is arranged on the positioning seat, a pin sleeve body is placed in the arc-shaped slot, and clamping components for clamping the pin sleeve body are respectively arranged on both sides of the positioning seat, a limit baffle is fixed on one side of the positioning seat, one end of the pin sleeve body is against the limit baffle, a moving component is fixed on the base plate, a motor seat is installed on the moving component, a first servo motor is fixed on the motor seat, an extension rod is fixed on the motor shaft of the first servo motor, and a test grinding head is installed on the extension rod; the process of applying the coupling agent is time-saving, labor-saving, convenient and quick, and can avoid the phenomenon of uneven thickness of the coupling agent and dead angle of application, and can improve the accuracy of ultrasonic flaw detection.

Description

Technical Field

[0001] The invention relates to the technical field of pin sleeve wear resistance testing, in particular to a pin sleeve wear resistance coupling testing machine. Background Art

[0002] The purpose of the pin sleeve wear resistance test is to evaluate and improve the wear resistance of the pin sleeve under specific conditions to ensure its reliability and durability in long-term use. The purpose of the pin sleeve wear resistance test includes: evaluating the wear rate or wear degree of the pin sleeve under specified friction conditions, which can be achieved by measuring the wear amount of the sample, that is, the difference between the mass of the sample before and after grinding divided by the worn area, so as to express the wear resistance of the material under specific conditions. Study the process measures and methods to prevent or reduce wear, and explore effective methods to improve wear resistance by testing pin sleeves of different materials or different treatment methods, so as to optimize the design and production process of the pin sleeve.

[0003] At present, after the wear resistance test of the pin sleeve is completed, the wear resistance test results need to be evaluated, and the pin sleeve needs to be subjected to ultrasonic flaw detection. The ultrasonic detector uses high-frequency sound waves to detect defects inside the pin sleeve, and detects cracks, holes, inclusions, delamination and other defects inside the pin sleeve, providing detailed information on the size, location and nature of the defects. During the flaw detection, the coupling agent needs to be applied to the surface of the workpiece to ensure the accuracy and effectiveness of the detection by excluding air, reducing friction and improving image quality. Due to the small internal space of the pin sleeve, the coupling agent needs to be manually applied to the wear resistance test area of ​​the pin sleeve during the application process, which is time-consuming and labor-intensive. In addition, the application process is prone to uneven application thickness and blind spots due to the inability to carefully observe the internal conditions during the application process, which greatly affects the accuracy of ultrasonic flaw detection and the evaluation results of the pin sleeve wear resistance test. Summary of the invention

[0004] The present invention provides a pin sleeve wear resistance coupling tester, which has the advantages of saving time and labor during the coupling agent application process, being convenient and quick, and being able to avoid the phenomenon of uneven coupling agent application thickness and application dead corners, thereby improving the accuracy of ultrasonic flaw detection. It solves the problem mentioned in the above background technology that the coupling agent needs to be applied manually to the wear resistance test area of ​​the pin sleeve during the application process, which is time-consuming and labor-intensive, and the problem that the application thickness is uneven and the internal conditions cannot be carefully observed during the application process, resulting in dead corners, greatly affecting the accuracy of ultrasonic flaw detection and the evaluation results of the pin sleeve wear resistance test.

[0005] The present invention provides the following technical solution: a pin sleeve wear resistance coupling testing machine, including a bottom plate, a positioning seat is fixed on the bottom plate, an arc-shaped clamping groove is arranged on the positioning seat, a pin sleeve body is placed in the arc-shaped clamping groove, and clamping components for clamping the pin sleeve body are respectively arranged on both sides of the positioning seat. A limiting baffle is fixed on one side of the positioning seat, one end of the pin sleeve body abuts against the limiting baffle, a moving component is fixed on the bottom plate, a motor seat is installed on the moving component, a first servo motor is fixed on the motor seat, an extension rod is fixed on the motor shaft of the first servo motor, and a test grinding head is installed on the extension rod.

[0006] A fixing plate is fixed on one side of the bottom plate, a coating cylinder is arranged at one end of the pin sleeve body, a piston component slidably connected with the coating cylinder is arranged on the fixing plate, a flow channel is opened in the coating cylinder, an annular scraping plate is fixed on the circumferential surface of the coating cylinder, a nozzle is fixed on the coating cylinder, and the nozzle is communicated with the flow channel.

[0007] As an optional scheme of the pin sleeve wear resistance coupling testing machine of the present invention, wherein: the clamping component includes a guiding block, the guiding block is fixed on the positioning seat, a guiding rod is slidably connected on the guiding block, an arc-shaped clamping plate is fixed at the end of the guiding rod, the guiding block is elastically connected with the arc-shaped clamping plate through a first spring, a first abutting wedge block is fixed on the arc-shaped clamping plate, a resisting frame is slidably connected on the positioning seat, the resisting frame abuts against the first abutting wedge block, and a second spring is connected between the resisting frame and the positioning seat.

[0008] As an optional scheme of the pin sleeve wear resistance coupling testing machine of the present invention, wherein: an electric push rod is fixed on the positioning seat, a connecting rod is fixed at the telescopic end of the electric push rod, a second abutting wedge block is fixed on the connecting rod, and the second abutting wedge block abuts against the resisting frame.

[0009] As an optional scheme of the pin sleeve wear resistance coupling testing machine of the present invention, wherein: the moving component includes a C-shaped seat, the C-shaped seat is fixed on the bottom plate, two sliding rods are fixed on the C-shaped seat, a moving table is slidably connected on the sliding rods, the motor seat is fixed on the moving table, a lead screw is rotatably connected on the C-shaped seat, a threaded block is threadedly connected on the lead screw, the threaded block is fixed to the moving table, a second servo motor is installed at one end of the C-shaped seat, and the motor shaft of the second servo motor is in transmission connection with one end of the lead screw through a coupling.

[0010] As an optional scheme of the pin sleeve wear resistance coupling testing machine of the present invention, wherein: a chute is opened at one end of the extension rod, a wedge-shaped pin is slidably connected in the chute, and the extension rod is elastically connected with the wedge-shaped pin through a third spring.

[0011] As an optional solution of the pin sleeve wear resistance coupling testing machine described in the present invention, a first semicircular piece is fixed to one end of the applicator tube, a second semicircular piece is arranged on one side of the first semicircular piece, a slot matching the wedge pin is opened on the second semicircular piece, a mounting plate is fixed on the applicator tube, and the mounting plate is elastically connected to the second semicircular piece through a fourth spring.

[0012] As an optional solution of the pin sleeve wear resistance coupling testing machine described in the present invention, the piston assembly includes a hollow piston rod, a piston plate is fixed to one end of the hollow piston rod, and the other end of the hollow piston rod is rotatably connected to the fixed plate, the piston plate is slidably connected in the applicator barrel, a fifth spring is mounted on the hollow piston rod, the two ends of the fifth spring are respectively abutted between the applicator barrel and the piston plate, a through hole is opened on the hollow piston rod, and the through hole is communicated with the applicator barrel.

[0013] As an optional solution of the pin sleeve wear resistance coupling testing machine described in the present invention, a rectangular groove is provided on one side of the applicator barrel, a seesaw is arranged in the rectangular groove, the seesaw is elastically connected to the applicator barrel through a torsion spring, a first resistance rod is slidably connected to the applicator barrel, one end of the first resistance rod is in resistance to the seesaw, and a sixth spring is fixed between the first resistance rod and the applicator barrel.

[0014] As an optional solution of the pin sleeve wear resistance coupling testing machine described in the present invention, a second resistance rod is arranged in the flow channel, the second resistance rod is elastically connected to the application tube through a seventh spring, one end of the second resistance rod is in resistance to the seesaw, and a blocking block is fixed on the second resistance rod.

[0015] As an optional solution of the pin sleeve wear resistance coupling testing machine described in the present invention, a third interference wedge is slidably connected to the mounting plate, the third interference wedge is fixed on the second semicircular piece, and the other end of the second interference rod is in conflict with the third interference wedge.

[0016] The present invention has the following beneficial effects:

[0017] 1. In the pin sleeve wear resistance coupling tester, the positioning seat is convenient for limiting the pin sleeve body through the cooperation of the arc-shaped slot opened on the positioning seat and the fixed limit baffle. The connecting rod fixed at the end of the electric push rod can realize the purpose of driving the second interference wedge to move horizontally and interfere with the clamping component, so that the clamping component can firmly fix the pin sleeve body on the positioning seat, and the movement can be avoided during the test to affect the accuracy of the test. The working distance of the test grinding head installed on the extension rod can be adjusted by the moving component, which is convenient for reaching into the inner side of the pin sleeve body. The first servo motor can be used to drive the test grinding head to rotate to perform the wear resistance test on the pin sleeve body. When the piston assembly installed on the fixed plate is slidably connected to the applicator barrel, the moving distance of the applicator barrel can be limited, and it is also convenient to inject the coupling agent into the interior of the applicator barrel. When the end of the extension rod is engaged with one end of the applicator barrel, the applicator barrel can be driven to move into the interior of the pin sleeve body, and can rotate synchronously with the test grinding head, so that the coupling agent can be squeezed onto the inner wall of the pin sleeve body during the movement of the applicator barrel. The coupling agent can be evenly applied to the inner wall of the pin sleeve body through the cooperation of the annular scraper. The process of applying the coupling agent saves time and effort, is convenient and quick, and can avoid the phenomenon of uneven thickness of the coupling agent and dead angle of application, thereby improving the accuracy of ultrasonic flaw detection.

[0018] 2. In the pin sleeve wear resistance coupling tester, when the extension rod is connected to the coating barrel, the slide groove of the extension rod can be elastically connected to the wedge pin through the third spring. When the extension rod is inserted into the first semicircular piece and the second semicircular piece at one end of the coating barrel, the wedge pin can be resisted and retracted into the slide groove. As the extension rod continues to move and rotate, when the wedge pin encounters the slot, it can be automatically inserted into the slot, so that the extension rod can be automatically engaged with the coating barrel. The coating barrel can be dragged to move on the piston piece fixed at the end of the hollow piston rod by the extension rod, so that the coating barrel can rotate and squeeze out the coupling agent under the drive of the test grinding head, so that the coupling agent can flow from the nozzle to the inner wall of the pin sleeve body. The coupling agent can be quickly and evenly applied to the inner wall of the pin sleeve body through the cooperation of the annular scraper.

[0019] 3. In the pin sleeve wear resistance coupling tester, when the test grinding head moves horizontally to a certain position and the coupling agent is applied, the coating tube drives the first resistance rod to move horizontally and contact with the piston plate, so as to achieve the purpose of deflecting the seesaw and contacting with the second resistance rod, and prompting the second resistance rod to move horizontally in the flow channel, so as to achieve the purpose of one end of the second resistance rod contacting with the third resistance wedge block slidingly connected to the mounting plate, prompting the third resistance wedge block to automatically drive the second semicircular plate to move, facilitating the separation of the wedge pin and the slot, and prompting the coating tube and the extension rod to separate from the pin sleeve body, so as to avoid obstruction to ultrasonic flaw detection. At the same time, when the second resistance rod moves horizontally, it can drive the blocking block to move synchronously. When the coupling agent is applied, the blocking block can block the nozzle, so as to avoid waste caused by excessive outflow of coupling agent. Brief Description of the Drawings

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present invention.

[0021] Figure 2 This is a structural sectional view of the present invention.

[0022] Figure 3 This is a structural schematic diagram of the positioning seat of the present invention.

[0023] Figure 4 This is a structural schematic diagram of the coating cylinder of the present invention.

[0024] Figure 5 This is a structural sectional view of the coating cylinder of the present invention.

[0025] Figure 6 This is a structural schematic diagram of the interior of the rectangular groove of the present invention.

[0026] Figure 7 It is Figure 2 a partial enlarged schematic view at position A in

[0027] In the figure: 1, bottom plate; 2, positioning seat; 3, bushing body; 4, motor base; 41, C-shaped seat; 42, sliding rod; 43, moving table; 44, lead screw; 45, threaded block; 46, second servo motor; 5, first servo motor; 6, extension rod; 7, test grinding head; 8, arc-shaped card slot; 81, guide block; 82, guide rod; 83, arc-shaped clamping plate; 84, first wedge block; 85, contact frame; 86, second spring; 87, first spring; 9, limit baffle; 10, fixing plate; 101, hollow piston rod; 102, piston piece; 103, fifth spring; 104, through hole; 11, coating cylinder; 12, flow channel; 13, annular scraping plate; 14, nozzle; 15, electric push rod; 16, connecting rod; 17, second wedge block; 18, chute; 19, wedge-shaped pin; 191, third spring; 20, first semi-circular piece; 21, second semi-circular piece; 22, slot; 23, mounting plate; 24, fourth spring; 25, rectangular groove; 26, seesaw; 27, torsion spring; 28, first contact rod; 29, sixth spring; 30, second contact rod; 31, seventh spring; 32, third wedge block; 33, plugging block. Detailed Description of the Invention

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Example 1. Please refer to Figure 1-Figure 7 , a coupling wear resistance testing machine for a pin bushing, comprising a bottom plate 1, a positioning seat 2 fixed on the bottom plate 1, an arc-shaped card slot 8 provided on the positioning seat 2, a pin bushing body 3 placed in the arc-shaped card slot 8, and clamping assemblies for clamping the pin bushing body 3 are respectively arranged on both sides of the positioning seat 2. A limiting baffle 9 is fixed on one side of the positioning seat 2, and one end of the pin bushing body 3 abuts against the limiting baffle 9. A moving assembly is fixed on the bottom plate 1, a motor seat 4 is installed on the moving assembly, a first servo motor 5 is fixed on the motor seat 4, an extension rod 6 is fixed on the motor shaft of the first servo motor 5, and a test grinding head 7 is installed on the extension rod 6;

[0030] A fixing plate 10 is fixed on one side of the bottom plate 1. A coating cylinder 11 is arranged at one end of the pin bushing body 3. A piston assembly slidably connected to the coating cylinder 11 is arranged on the fixing plate 10. A flow channel 12 is opened in the coating cylinder 11, and an annular scraping plate 13 is fixed on the circumferential surface of the coating cylinder 11. A nozzle 14 is fixed on the coating cylinder 11, and the nozzle 14 is communicated with the flow channel 12.

[0031] The clamping assembly includes a guide block 81 fixed on the positioning seat 2. A guide rod 82 is slidably connected to the guide block 81. An arc-shaped clamping plate 83 is fixed at the end of the guide rod 82. The guide block 81 is elastically connected to the arc-shaped clamping plate 83 through a first spring 87. A first abutting wedge block 84 is fixed on the arc-shaped clamping plate 83. A resisting frame 85 is slidably connected to the positioning seat 2. The resisting frame 85 abuts against the first abutting wedge block 84. A second spring 86 is connected between the resisting frame 85 and the positioning seat 2.

[0032] An electric push rod 15 is fixed on the positioning seat 2. A connecting rod 16 is fixed at the telescopic end of the electric push rod 15. A second abutting wedge block 17 is fixed on the connecting rod 16. The second abutting wedge block 17 abuts against the resisting frame 85.

[0033] The moving assembly includes a U-shaped seat 41 fixed on the bottom plate 1. Two sliding rods 42 are fixed on the U-shaped seat 41. A moving table 43 is slidably connected to the sliding rods 42. The motor seat 4 is fixed on the moving table 43. A lead screw 44 is rotatably connected to the U-shaped seat 41. A threaded block 45 is threadedly connected to the lead screw 44. The threaded block 45 is fixedly connected to the moving table 43. A second servo motor 46 is installed at one end of the U-shaped seat 41. The motor shaft of the second servo motor 46 is传动连接 with one end of the lead screw 44 through a coupling. (It should be noted that the specific transmission method here is not clearly described in the original text, and a more accurate expression may be needed according to the actual situation. For the sake of translation, it is temporarily translated as "传动连接", which may need to be adjusted.)

[0034] When testing the wear resistance of the pin bushing body 3, refer to Figure 1-Figure 2, place the pin sleeve body 3 into the arc-shaped slot 8 on the positioning seat 2, and place one end of the pin sleeve body 3 against the limit baffle 9 to limit the pin sleeve body 3, and drive the connecting rod 16 and the two second contact wedges 17 fixed on the connecting rod 16 to move horizontally synchronously through the telescopic end of the electric push rod 15, so that the second contact wedges 17 are in contact with the contact frames 85 in the two clamping assemblies, and the second spring 86 accumulates force, and the contact frame 85 is contacted and moves upward to contact the first contact wedge 84, so that the arc clamping plate 83 drives the two guide rods 82 to slide horizontally on the guide block 81. The first spring 87 accumulates force, and the arc-shaped clamping plate 83 can firmly fix the pin sleeve body 3 on the positioning seat 2. During the test, movement that affects the accuracy of the test can be avoided. The second servo motor 46 in the moving assembly drives the lead screw 44 to rotate, and the cooperation of the threaded block 45 causes the moving platform 43 to move horizontally on the two sliding rods 42, so that the motor seat 4 can drive the first servo motor 5, the extension rod 6 and the test grinding head 7 to move horizontally synchronously. The first servo motor 5 drives the extension rod 6 and the test grinding head 7 to rotate, so that the test grinding head 7 can extend into the pin sleeve body 3 for wear resistance test.

[0035] Embodiment 2: This embodiment is an improvement made on the basis of Embodiment 1. For details, please refer to Figure 1-Figure 7 A slide groove 18 is provided at one end of the extension rod 6, and a wedge pin 19 is slidably connected in the slide groove 18. The extension rod 6 is elastically connected to the wedge pin 19 through a third spring 191.

[0036] A first semicircular piece 20 is fixed at one end of the applicator tube 11, a second semicircular piece 21 is arranged on one side of the first semicircular piece 20, a slot 22 adapted to the wedge pin 19 is opened on the second semicircular piece 21, a mounting plate 23 is fixed on the applicator tube 11, and the mounting plate 23 is elastically connected to the second semicircular piece 21 through a fourth spring 24.

[0037] The piston assembly includes a hollow piston rod 101, one end of which is fixed with a piston plate 102, and the other end of the hollow piston rod 101 is rotatably connected to the fixed plate 10, the piston plate 102 is slidably connected in the applicator tube 11, and a fifth spring 103 is mounted on the hollow piston rod 101, and the two ends of the fifth spring 103 are respectively abutted between the applicator tube 11 and the piston plate 102, and a through hole 104 is opened on the hollow piston rod 101, and the through hole 104 is connected to the applicator tube 11.

[0038] After the wear resistance test, ultrasonic flaw detection needs to be carried out. During the ultrasonic flaw detection process, coupling agent needs to be applied to the surface of the workpiece. Figure 2-Figure 7, the moving component drives the test grinding head 7 fixed on the extension rod 6 to move in the pin sleeve body 3, which can prompt the end of the extension rod 6 to be inserted into the first semicircular piece 20 and the second semicircular piece 21 at one end of the smear tube 11. At the same time, the wedge pin 19 can be retracted into the slide groove 18 when it is resisted by the first semicircular piece 20 and the second semicircular piece 21 as the extension rod 6 moves. The third spring 191 accumulates force, and when the extension rod 6 rotates, it can drive the wedge pin 19 to rotate synchronously, so that when the wedge pin 19 encounters the slot 22, the elastic force released by the third spring 191 can be automatically inserted into the slot 22, so as to achieve the purpose of automatic engagement between the extension rod 6 and the smear tube 11. When the extension rod 6 moves, it can drag the smear tube 11 to move horizontally, and is connected to the hollow piston rod 101 through the external coupling agent delivery device, which is convenient The coupling agent is injected into the hollow piston rod 101 and flows into the coating tube 11 through the through hole 104. The extension rod 6 is used to move the assembly to drive the piston plate 102 on the hollow piston rod 101 to slide, so that the coating tube 11 can be inserted into the pin sleeve body 3. At the same time, the rotating test grinding head 7 can drive the coating tube 11 to rotate. During the movement of the coating tube 11, the coupling agent inside is squeezed by the piston plate 102 and can flow out of the nozzle 14 quickly along the flow channel 12. The coating tube 11 can rotate and squeeze out the coupling agent under the drive of the test grinding head 7, so that the coupling agent can be automatically squeezed onto the inner wall of the pin sleeve body 3. At the same time, the fifth spring 103 accumulates force, and the coupling agent can be quickly and evenly applied to the inner wall of the pin sleeve body 3 through the cooperation of the annular scraper 13 installed on the outside of the coating tube 11.

[0039] Embodiment 3: This embodiment is an improvement made on the basis of Embodiment 2. For details, please refer to Figure 1-Figure 7 A rectangular groove 25 is provided on one side of the applicator barrel 11, and a seesaw 26 is arranged in the rectangular groove 25. The seesaw 26 is elastically connected to the applicator barrel 11 through a torsion spring 27. A first resistance rod 28 is slidably connected to the applicator barrel 11, and one end of the first resistance rod 28 is in resistance to the seesaw 26. A sixth spring 29 is fixed between the first resistance rod 28 and the applicator barrel 11.

[0040] A second resistance rod 30 is disposed in the flow channel 12 . The second resistance rod 30 is elastically connected to the coating tube 11 via a seventh spring 31 . One end of the second resistance rod 30 is in resistance to the rocker 26 . A blocking block 33 is fixed to the second resistance rod 30 .

[0041] A third abutting wedge 32 is slidably connected to the mounting plate 23 . The third abutting wedge 32 is fixed to the second semicircular piece 21 . The other end of the second abutting rod 30 abuts against the third abutting wedge 32 .

[0042] After the coupling agent is applied, the extension rod 6 needs to be separated from the application tube 11 to avoid affecting the operation of the ultrasonic detector. Figure 4-Figure 6When the test grinding head 7 moves horizontally to a certain position, the smear tube 11 drives the first resistance rod 28 to move horizontally and resist the piston plate 102, so that the first resistance rod 28 moves horizontally and resists one end of the seesaw 26, and the seesaw 26 deflects. At the same time, the sixth spring 29 and the torsion spring 27 store force, and the deflected seesaw 26 resists the second resistance rod 30 in the flow channel 12. When the second resistance rod 30 moves horizontally, one end resists the third resistance wedge 32 slidably connected to the mounting plate 23, so that the third resistance wedge The block 32 drives the second semicircular piece 21 to move, which facilitates the separation of the wedge pin 19 from the slot 22. At the same time, the second abutment rod 30 can drive the blocking block 33 to move synchronously when it moves horizontally. After the coupling agent is applied, the blocking block 33 can block the nozzle 14 to avoid excessive outflow of the coupling agent and cause waste. At the same time, the fifth spring 103 releases its elastic force, which can prompt the coating tube 11 to reset. The extension rod 6 is reset with the cooperation of the moving component, which facilitates the detection head of the ultrasonic detector to penetrate into the pin sleeve body 3 for detection.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A pin sleeve wear resistance coupling testing machine, comprising a base plate (1), characterized in that: A positioning seat (2) is fixed on the bottom plate (1), an arc-shaped groove (8) is provided on the positioning seat (2), a pin sleeve body (3) is placed in the arc-shaped groove (8), and clamping components for clamping the pin sleeve body (3) are respectively provided on both sides of the positioning seat (2), a limit baffle (9) is fixed on one side of the positioning seat (2), one end of the pin sleeve body (3) abuts against the limit baffle (9), a moving component is fixed on the bottom plate (1), a motor seat (4) is installed on the moving component, a first servo motor (5) is fixed on the motor seat (4), an extension rod (6) is fixed on the motor shaft of the first servo motor (5), and a test grinding head (7) is installed on the extension rod (6); A fixing plate (10) is fixed to one side of the base plate (1), an applicator barrel (11) is provided at one end of the pin sleeve body (3), a piston assembly slidably connected to the applicator barrel (11) is provided on the fixing plate (10), a flow channel (12) is provided in the applicator barrel (11), and an annular scraper (13) is fixed to the circumferential surface of the applicator barrel (11), a nozzle (14) is fixed to the applicator barrel (11), and the nozzle (14) is connected to the flow channel (12); A slide groove (18) is formed at one end of the extension rod (6), a wedge pin (19) is slidably connected in the slide groove (18), and the extension rod (6) is elastically connected to the wedge pin (19) via a third spring (191); A first semicircular sheet (20) is fixed to one end of the smear tube (11), a second semicircular sheet (21) is provided on one side of the first semicircular sheet (20), and a slot (22) adapted to the wedge-shaped pin (19) is provided on the second semicircular sheet (21).

2. The pin sleeve wear resistance coupling testing machine according to claim 1, characterized in that: The clamping assembly comprises a guide block (81), the guide block (81) being fixed on the positioning seat (2), and a guide rod (82) being slidably connected to the guide block (81), an arc-shaped clamping plate (83) being fixed to the end of the guide rod (82), the guide block (81) being elastically connected to the arc-shaped clamping plate (83) via a first spring (87), a first abutting wedge (84) being fixed to the arc-shaped clamping plate (83), a butting frame (85) being slidably connected to the positioning seat (2), the butting frame (85) being in abutment with the first butting wedge (84), and a second spring (86) being connected between the butting frame (85) and the positioning seat (2).

3. The pin sleeve wear resistance coupling testing machine according to claim 2, characterized in that: An electric push rod (15) is fixed on the positioning seat (2), a connecting rod (16) is fixed to the telescopic end of the electric push rod (15), a second abutting wedge (17) is fixed on the connecting rod (16), and the second abutting wedge (17) abuts against the abutting frame (85).

4. The pin sleeve wear resistance coupling testing machine according to claim 3, characterized in that: The moving component includes a U-shaped seat (41) fixed on the bottom plate (1). Two sliding rods (42) are fixed on the U-shaped seat (41). A moving platform (43) is slidably connected to the sliding rods (42). The motor base (4) is fixed on the moving platform (43). A lead screw (44) is rotatably connected to the U-shaped seat (41). A threaded block (45) is threadedly connected to the lead screw (44). The threaded block (45) is fixedly connected to the moving platform (43). A second servo motor (46) is installed at one end of the U-shaped seat (41). The motor shaft of the second servo motor (46) is drivingly connected to one end of the lead screw (44) through a coupling.

5. The pin sleeve wear resistance coupling testing machine according to claim 4, characterized in that: An installation plate (23) is fixed on the coating cylinder (11). The installation plate (23) is elastically connected to the second semi-circular piece (21) through a fourth spring (24).

6. The pin sleeve wear resistance coupling testing machine according to claim 5, characterized in that: The piston assembly includes a hollow piston rod (101). A piston piece (102) is fixed at one end of the hollow piston rod (101). The other end of the hollow piston rod (101) is rotatably connected to the fixed plate (10). The piston piece (102) is slidably connected in the coating cylinder (11). A fifth spring (103) is sleeved on the hollow piston rod (101). Two ends of the fifth spring (103) respectively abut between the coating cylinder (11) and the piston piece (102). A through hole (104) is formed in the hollow piston rod (101). The through hole (104) is communicated with the coating cylinder (11).

7. The pin sleeve wear resistance coupling testing machine according to claim 6, characterized in that: A rectangular groove (25) is formed in one side of the coating cylinder (11). A rocker (26) is arranged in the rectangular groove (25). The rocker (26) is elastically connected to the coating cylinder (11) through a torsion spring (27). A first abutting rod (28) is slidably connected to the coating cylinder (11). One end of the first abutting rod (28) abuts against the rocker (26). A sixth spring (29) is fixed between the first abutting rod (28) and the coating cylinder (11).

8. The pin sleeve wear resistance coupling testing machine according to claim 7, characterized in that: A second abutting rod (30) is arranged in the flow channel (12). The second abutting rod (30) is elastically connected to the coating cylinder (11) through a seventh spring (31). One end of the second abutting rod (30) abuts against the rocker (26). A blocking block (33) is fixed on the second abutting rod (30).

9. The pin sleeve wear resistance coupling testing machine according to claim 8, characterized in that: A third abutting wedge block (32) is slidably connected to the installation plate (23). The third abutting wedge block (32) is fixed on the second semi-circular piece (21). The other end of the second abutting rod (30) abuts against the third abutting wedge block (32).

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