Diaphragm spring fatigue test device

Abstract

The invention discloses a testing device for a diaphragm spring fatigue test, and belongs to the technical field of spring fatigue tests.A rectangular mounting frame, a fixed insertion rod, a fixed spring and a connecting strip are arranged, and after a diaphragm spring body is arranged on the surface of a mounting sleeve in a sleeving mode and tightly attached to the top of a pressure sensor; the two sets of connecting strips are pushed to get close to each other to drive the fixing inserting rods to retract into the corresponding mounting grooves, the pressing plates are correspondingly clamped into the rectangular mounting frame, it is ensured that through holes in the tops of the pressing plates penetrate through the mounting sleeves, pressing clamping grooves in the two sides of the pressing plates are tightly attached to the tops of the rectangular clamping strips, and meanwhile the fixing inserting rods correspond to fixing inserting holes in position; and the connecting strip is loosened, and the limiting plate is jacked to one side of the mounting groove under the springback effect of the fixed spring, so that the fixed insertion rod is jacked out of the mounting groove to be clamped into the corresponding fixed insertion hole, the pressing plate is clamped and fixed into the rectangular mounting frame, and the pressing plate which is used for a long time can be conveniently disassembled, overhauled or replaced.

Description

Technical Field

[0001] The invention belongs to the technical field of spring fatigue testing, and in particular relates to a diaphragm spring fatigue testing device. Background Art

[0002] The diaphragm spring is a disc spring with a special structure made of spring steel. It mainly consists of a disc spring part and a separation finger part. It is widely used in fields such as automotive clutches. In order to evaluate the diaphragm spring's ability to withstand long-term loads under actual working conditions and predict its service life and reliability, fatigue tests are often performed to apply mechanical stress to the diaphragm spring, simulate the behavior of the diaphragm spring under cyclic load, and observe its fatigue fracture, so as to evaluate the performance of the diaphragm spring in actual applications. In addition, fatigue tests help to discover potential design defects or material problems in the diaphragm spring.

[0003] When the existing diaphragm spring fatigue test device applies pressure to the diaphragm spring for a long time for testing, the clamping plate is pressed on the top of the diaphragm spring for a long time, and the diaphragm spring rebounds to press against the clamping plate, which easily leaves scratches on the surface of the clamping plate, resulting in an uneven surface of the clamping plate, affecting the uniform pressure applied by the clamping plate to the diaphragm spring. Since the clamping plate and the test device are a whole and are generally fixed by bolts, it is not convenient to disassemble the clamping plate at will. Therefore, improvement is needed. Summary of the invention

[0004] In order to overcome the above-mentioned defects, the present invention provides a diaphragm spring fatigue test device, which solves the problem that after the existing diaphragm spring fatigue test device applies pressure to the diaphragm spring for a long time for testing, scratches will be left on the surface of the clamping plate, thereby affecting the uniform application of pressure by the clamping plate on the diaphragm spring, and the problem that it is inconvenient to disassemble the clamping plate at will because the clamping plate is fixed as a whole with the test device by bolts.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a diaphragm spring fatigue test device, comprising a base plate, a lifting mechanism is fixedly installed at the four corners of the top of the base plate, a diaphragm spring body is provided at the central position of the top of the base plate located at the bottom of the lifting mechanism, a mounting sleeve is fixedly installed at the central position of the top of the base plate, and the diaphragm spring body is sleeved on the surface of the mounting sleeve, a clamping plate is provided at the top of the lifting mechanism, and the top of the mounting sleeve passes through the clamping plate, mounting strips are symmetrically fixedly installed on both sides of the clamping plate located at the top of the lifting mechanism, and connecting strips are symmetrically provided at the top of the clamping plate located between the two ends of the two groups of mounting strips.

[0006] As a further solution of the present invention: feet are fixedly installed at the four corners of the bottom of the base plate, a shield is fixedly installed on the top of the base plate, a pad is fixedly installed at the central position of the top of the base plate, and a pressure sensor is embedded and fixedly installed on the bottom of the pad.

[0007] As a further solution of the present invention: the lifting mechanism includes four groups of mounting columns, rectangular connecting frames are fixedly installed on the top ends of the four groups of mounting columns, a rectangular mounting frame is slidably installed on the surface of the bottom of the rectangular connecting frame located at the top of the four groups of mounting columns, a lifting spring is provided on the surface of the mounting column located at the bottom of the rectangular mounting frame, rectangular clips are fixedly installed at the central positions on both sides of the inner wall of the rectangular mounting frame, and fixed sockets are symmetrically provided on the inner walls of the rectangular mounting frame located on both sides of the rectangular clips.

[0008] As a further solution of the present invention: rectangular slide grooves are symmetrically provided on the surface of the mounting sleeve, limiting slide grooves are symmetrically provided on both sides of the inner wall of the mounting sleeve, a movable screw is rotatably installed between the two ends inside the mounting sleeve, and a movable seat is provided on the surface of the movable screw located inside the mounting sleeve, movable rollers are symmetrically fixedly installed on the surface of the movable seat, and the positions of the movable rollers and the limiting slide grooves correspond, and pressure clamps are symmetrically rotatably installed on both sides of the surface of the movable seat, and the pressure clamps correspond to the positions of the rectangular slide grooves.

[0009] As a further solution of the present invention: a locking stud is fixedly installed on the top of the movable screw through the installation sleeve, a locking screw sleeve is provided on the surface of the locking stud located on the top of the installation sleeve, and a cross plate is fixedly installed on the locking stud away from the top of the movable screw.

[0010] As a further solution of the present invention: a through hole is provided at the central position of the top of the clamping plate, and the through hole passes through the clamping plate, the through hole corresponds to the position of the mounting sleeve, rectangular slots are symmetrically provided on both sides of the top of the inner wall of the through hole, the rectangular slots correspond to the position of the pressure clamping plate and have the same shape, and clamping slots are symmetrically provided on the bottom of both sides of the clamping plate, the clamping slots correspond to the position of the rectangular clamping strip and have the same shape.

[0011] As a further solution of the present invention: installation grooves are symmetrically provided at both ends of the installation bar, one end of the installation groove is connected to a movable groove, a fixed plug rod is slidably installed inside the installation groove, and one end of the fixed plug rod away from the movable groove passes through the installation groove and extends to the outside of the installation bar corresponding to the position of the fixed socket.

[0012] As a further solution of the present invention: a limiting plate is fixedly installed on the surface of the fixed rod located inside the installation groove away from the movable groove, a fixing spring is provided on the surface of the fixed rod located inside the installation groove, a shift rod is fixedly installed on one end of the fixed rod located inside the movable groove, and the shift rod passes through the movable groove and extends to the top of the installation bar, and a connecting bar is fixedly installed between the shift rods opposite to each other on both sides of the two groups of installation bars.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. In the present invention, a rectangular mounting frame, a fixed plug rod, a fixed spring and a connecting strip are provided, and after the diaphragm spring body is sleeved on the surface of the mounting sleeve and pressed against the top of the pressure sensor, the two sets of connecting strips are pushed close to each other to drive the fixed plug rod to retract into the corresponding mounting groove, and the clamping plate is correspondingly inserted into the rectangular mounting frame, ensuring that the through hole at the top of the clamping plate passes through the mounting sleeve, so that the clamping grooves on both sides of the clamping plate are pressed against the top of the rectangular clamping strip, and at the same time, the fixed plug rod is aligned with the position of the fixed plug hole, and the connecting strip is loosened. Under the rebound action of the fixed spring, the limit plate is pushed toward one side of the mounting groove, so that the fixed plug rod is pushed out of the mounting groove and clamped into the corresponding fixed plug hole, thereby clamping and fixing the clamping plate inside the rectangular mounting frame, which is convenient for disassembly, inspection or replacement of the clamping plate that has been used for a long time.

[0015] The cam is pressed against the top of the diaphragm spring body and the cam is pressed against the top of the pressure sensor, and the pressure of the diaphragm spring body is monitored in real time, so that the bearing capacity of the diaphragm spring body under static load can be tested, and after the diaphragm spring body has been subjected to the pressure load for a certain period of time, the moving screw is rotated in the opposite direction to control the moving seat to move up on the surface of the moving screw, and the pressing plate is pushed upward and away from the diaphragm spring body under the rebound action of the cam. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional structural schematic diagram of the present invention;

[0017] Figure 2 It is a cross-sectional structural schematic diagram of the bottom plate and the lifting mechanism of the present invention;

[0018] Figure 3 It is a cross-sectional structural schematic diagram of the installation sleeve of the present invention;

[0019] Figure 4 It is a structural schematic diagram of the movable seat, movable roller and pressure card plate of the present invention;

[0020] Figure 5 It is a cross-sectional structural schematic diagram of the pressing plate and two sets of mounting strips of the present invention;

[0021] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure at A in the middle;

[0022] In the figure: 1, bottom plate; 101, bottom foot; 102, shield; 103, pad; 104, pressure sensor; 2, diaphragm spring body; 3, jacking mechanism; 301, mounting column; 302, rectangular connecting frame; 303, rectangular mounting frame; 304, jacking spring; 305, rectangular clamping strip; 306, fixing jack; 4, mounting sleeve; 401, rectangular slide groove; 402, limit slide groove; 403, moving screw; 404, moving seat; 405, moving roller; 406, pressure clamping plate; 407, locking stud; 408, locking screw sleeve; 409, cross plate; 5, clamping plate; 501, through hole; 502, rectangular slot; 503, clamping slot; 6, mounting strip; 601, mounting slot; 602, moving slot; 603, fixed plug rod; 604, limit plate; 605, fixed spring; 606, lever; 7, connecting strip. DETAILED DESCRIPTION

[0023] The technical solution of the present application is further described in detail below in conjunction with specific implementation methods.

[0024] like Figure 1-6 As shown, the present invention provides a technical solution: a diaphragm spring fatigue test device, comprising a base plate 1, base feet 101 are fixedly installed at the four corners of the bottom of the base plate 1, and a shield 102 is fixedly installed on the top of the base plate 1. By providing the shield 102, when a large pressure is applied to the diaphragm spring body 2 to cause the diaphragm spring body 2 to break, the flying fragments are shielded by the shield 102 to prevent the flying fragments from hurting the operator; a pad 103 is fixedly installed at the central position of the top of the base plate 1, and a pressure sensor 104 is embedded and fixedly installed at the bottom of the pad 103. Because the pressure sensor 104 is provided, when pressure is applied to the diaphragm spring body 2, the pressure sensor 104 is squeezed, so that the pressure on the diaphragm spring body 2 can be monitored in real time.

[0025] A lifting mechanism 3 is fixedly installed at the four corners of the top of the base plate 1, and the lifting mechanism 3 includes four groups of mounting columns 301, and a rectangular connecting frame 302 is fixedly installed on the top of the four groups of mounting columns 301. A rectangular mounting frame 303 is slidably installed on the surface of the bottom of the rectangular connecting frame 302 located at the top of the four groups of mounting columns 301. A lifting spring 304 is provided on the surface of the mounting column 301 located at the bottom of the rectangular mounting frame 303. By providing the lifting spring 304, the rectangular mounting frame 303 is pushed toward the rectangular connecting frame 302 under the rebound action of the lifting spring 304.

[0026] Rectangular clamping strips 305 are fixedly installed at the central positions on both sides of the inner wall of the rectangular mounting frame 303, and fixing holes 306 are symmetrically provided on the inner walls of the rectangular mounting frame 303 on both sides of the rectangular clamping strips 305. Due to the rectangular clamping strips 305, when the clamping plate 5 is placed inside the rectangular mounting frame 303, it is ensured that the clamping plate 5 is clamped and fixed inside the rectangular mounting frame 303 and will not slide down or detach.

[0027] A mounting sleeve 4 is fixedly installed at the central position of the top of the base plate 1, and the diaphragm spring body 2 is sleeved on the surface of the mounting sleeve 4, and rectangular slide grooves 401 are symmetrically provided on the surface of the mounting sleeve 4, and limiting slide grooves 402 are symmetrically provided on both sides of the inner wall of the mounting sleeve 4, and a moving screw 403 is rotatably installed between the two ends inside the mounting sleeve 4, and a moving seat 404 is provided on the surface of the moving screw 403 located inside the mounting sleeve 4; moving rollers 405 are symmetrically fixedly installed on the surface of the moving seat 404, and the moving rollers 405 correspond to the position of the limiting slide grooves 402, and pressure clamps 406 are symmetrically rotatably installed on both sides of the surface of the moving seat 404, and the pressure clamps 406 correspond to the position of the rectangular slide grooves 401. The moving screw 403 is controlled to rotate so that the moving seat 404 drives the pressure card plate 406 to move up and down on the surface of the moving screw 403. When the moving seat 404 moves up and down on the surface of the moving screw 403, it drives the moving roller 405 to slide inside the limiting slide groove 402, thereby ensuring that the moving seat 404 will not deflect when moving on the surface of the moving screw 403.

[0028] The top of the movable screw 403 passes through the installation sleeve 4 and is fixedly installed with a locking stud 407. The surface of the locking stud 407 located at the top of the installation sleeve 4 is provided with a locking screw sleeve 408. The top of the locking stud 407 away from the movable screw 403 is fixedly installed with a cross plate 409. After the movable seat 404 is located at a suitable height of the movable screw 403, the locking screw sleeve 408 is tightened to fit against the top of the installation sleeve 4, thereby locking and fixing the locking stud 407 to ensure that the movable screw 403 will not rotate and drive the movable seat 404 to move at will.

[0029] A clamping plate 5 is provided at the top of the lifting mechanism 3, and the top of the mounting sleeve 4 passes through the clamping plate 5. A through hole 501 is provided at the central position of the top of the clamping plate 5, and the through hole 501 passes through the clamping plate 5. The through hole 501 corresponds to the position of the mounting sleeve 4. Rectangular slots 502 are symmetrically provided on both sides of the top of the inner wall of the through hole 501. The rectangular slots 502 correspond to the position of the pressure card 406 and have the same shape. Clamping slots 503 are symmetrically provided at the bottom of both sides of the clamping plate 5. The clamping slots 503 correspond to the position of the rectangular card strip 305 and have the same shape. By providing the rectangular slots 502, after the pressure card 406 is rotated from both sides of the moving seat 404 to be parallel to the clamping plate 5, the moving seat 404 is controlled to drive the pressure card 406 to move and snap into the corresponding rectangular slots 502, ensuring that the pressure card 406 will not deflect when applying pressure to the clamping plate 5.

[0030] The two sides of the clamping plate 5 are symmetrically fixed with mounting bars 6 located at the top of the jacking mechanism 3. The two ends of the mounting bars 6 are symmetrically provided with mounting grooves 601. One end of the mounting groove 601 is connected with a movable groove 602. A fixed plug rod 603 is slidably installed inside the mounting groove 601. One end of the fixed plug rod 603 away from the movable groove 602 passes through the mounting groove 601 and extends to the outside of the mounting bar 6 corresponding to the position of the fixed plug hole 306. Because the fixed plug rod 603 is provided, after the fixed plug rod 603 is inserted into the corresponding fixed plug hole 306, the mounting bar 6 is clamped and fixed inside the rectangular mounting frame 303, thereby clamping the clamping plate 5 inside the rectangular mounting frame 303.

[0031] A limiting plate 604 is fixedly installed on the surface of the fixed rod 603 located inside the installation groove 601 away from the movable groove 602. A fixing spring 605 is provided on the surface of the fixed rod 603 located inside the installation groove 601. By providing the fixing spring 605, the fixing rod 603 can be pushed out of the installation groove 601 under the rebound action of the fixing spring 605, so that the fixing rod 603 is inserted into the corresponding fixing socket 306; a lever 606 is fixedly installed on one end of the fixed rod 603 located inside the movable groove 602, and the lever 606 extends through the movable groove 602 to the top of the installation bar 6, and a connecting bar 7 is fixedly installed between the opposite levers 606 on both sides of the two groups of installation bars 6. Because the connecting bar 7 is provided, the connecting bar 7 is pushed to move on the top of the clamping plate 5, thereby driving the two groups of fixed rods 603 on the same side of the two groups of installation bars 6 to move synchronously.

[0032] The working principle of the present invention is:

[0033] Put the diaphragm spring body 2 to be tested on the surface of the installation sleeve 4, so that the diaphragm spring body 2 is close to the top of the pressure sensor 104, push and squeeze the two groups of connecting strips 7 to drive the four groups of fixed plug rods 603 to retract into the corresponding installation grooves 601 respectively, and place the clamping plate 5 on the top of the rectangular mounting frame 303, so that the rectangular slot 502 is placed on the top of the rectangular clamping strip 305, until the position of the fixed plug rod 603 corresponds to the position of the fixed plug hole 306, loosen the connecting strip 7, and under the rebound effect of the fixed spring 605, press the limit plate 604 on the side of the installation groove 601 away from the movable groove 602, so that the fixed plug rod 603 is pushed out of the installation groove 601 and inserted into the corresponding fixed plug hole 306, and the clamping plate 5 is clamped and fixed inside the rectangular mounting frame 303, and at the same time, the clamping plate 5 is sleeved on the surface of the top of the installation sleeve 4;

[0034] Loosen the locking screw sleeve 408, control the movable seat 404 to move to the top of the installation sleeve 4, rotate the pressure card plate 406 to both sides until the pressure card plate 406 is parallel to the clamping plate 5, turn the cross plate 409 to drive the movable screw 403 to rotate, so that the movable seat 404 slides down on the surface of the movable screw 403 and approaches the clamping plate 5, until the pressure card plate 406 is stuck in the corresponding clamping groove 503, continue to control the movable screw 403 to rotate, so that the movable seat 404 drives the pressure card plate 406 to press down The clamping plate 5 is close to the top of the diaphragm spring body 2 until the clamping plate 5 is tightly attached to the top of the diaphragm spring body 2. The position of the moving seat 404 on the surface of the moving screw 403 is adjusted according to the test needs, the distance between the clamping plate 5 and the pad 103 is controlled, and the pressure applied by the clamping plate 5 to the diaphragm spring body 2 is adjusted to test the fatigue condition of the diaphragm spring body 2 after a certain period of pressure. At the same time, the pressure on the diaphragm spring body 2 is monitored in real time through the pressure sensor 104.

[0035] After the diaphragm spring body 2 has been subjected to pressure testing for a certain period of time, the locking screw sleeve 408 is loosened to control the moving screw 403 to reverse, so that the moving seat 404 moves up on the surface of the moving screw 403, and under the rebound action of the lifting spring 304, the rectangular mounting frame 303 drives the clamping plate 5 to move up and away from the top of the diaphragm spring body 2, until the rectangular mounting frame 303 is tightly attached to the bottom of the rectangular connecting frame 302, and then the moving seat 404 is controlled to move to the top of the mounting sleeve 4, and the two groups of pressure card plates 406 are flipped and put into the rectangular slide groove 401, and the two groups of connecting strips 7 are pushed and squeezed to drive the fixed plug rod 603 to disengage from the fixed socket 306, and the clamping plate 5 is removed from the top of the rectangular mounting frame 303, so as to facilitate the removal of the diaphragm spring body 2 from the surface of the mounting sleeve 4 at the top of the pad 103.

[0036] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one scheme", "some schemes", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the scheme or example are included in at least one scheme or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same scheme or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more schemes or examples in a suitable manner.

Claims

1. A diaphragm spring fatigue test device, comprising a base plate (1), characterized in that: A lifting mechanism (3) is fixedly installed at the four corners of the top of the base plate (1); a diaphragm spring body (2) is provided at the central position of the bottom of the lifting mechanism (3) at the top of the base plate (1); a mounting sleeve (4) is fixedly installed at the central position of the top of the base plate (1), and the diaphragm spring body (2) is sleeved on the surface of the mounting sleeve (4); a clamping plate (5) is provided at the top of the lifting mechanism (3), and the top of the mounting sleeve (4) passes through the clamping plate (5); mounting strips (6) are symmetrically fixedly installed on both sides of the clamping plate (5) located at the top of the lifting mechanism (3); and connecting strips (7) are symmetrically provided between the two ends of the two groups of mounting strips (6) at the top of the clamping plate (5).

2. A diaphragm spring fatigue test device according to claim 1, characterized in that: Base feet (101) are fixedly mounted at the four corners of the bottom of the base plate (1), a shield (102) is fixedly mounted on the top of the base plate (1), a pad (103) is fixedly mounted at the center of the top of the base plate (1), and a pressure sensor (104) is embedded and fixedly mounted on the bottom of the pad (103).

3. A diaphragm spring fatigue test device according to claim 1, characterized in that: The lifting mechanism (3) comprises four groups of mounting columns (301), the top ends of the four groups of mounting columns (301) are fixedly mounted with rectangular connecting frames (302), the bottom of the rectangular connecting frame (302) is slidably mounted with a rectangular mounting frame (303) on a surface located at the top of the four groups of mounting columns (301), the surface of the mounting column (301) located at the bottom of the rectangular mounting frame (303) is provided with a lifting spring (304), rectangular clamping strips (305) are respectively fixedly mounted at the central positions on both sides of the inner wall of the rectangular mounting frame (303), and the inner walls of the rectangular mounting frame (303) located on both sides of the rectangular clamping strip (305) are symmetrically provided with fixed plug holes (306).

4. A diaphragm spring fatigue test device according to claim 1, characterized in that: The surface of the installation sleeve (4) is symmetrically provided with a rectangular slide groove (401), and the inner walls of the installation sleeve (4) are symmetrically provided with limiting slide grooves (402). A movable screw rod (403) is rotatably installed between the two ends inside the installation sleeve (4), and a movable seat (404) is provided on the surface of the movable screw rod (403) located inside the installation sleeve (4). A movable roller (405) is symmetrically fixedly installed on the surface of the movable seat (404), and the position of the movable roller (405) corresponds to the position of the limiting slide groove (402). A pressure clamping plate (406) is symmetrically rotatably installed on the two sides of the surface of the movable seat (404), and the pressure clamping plate (406) corresponds to the position of the rectangular slide groove (401).

5. A diaphragm spring fatigue test device according to claim 4, characterized in that: The top end of the movable screw rod (403) passes through the installation sleeve (4) and is fixedly installed with a locking stud (407); the surface of the locking stud (407) located at the top of the installation sleeve (4) is provided with a locking screw sleeve (408); and the top end of the locking stud (407) away from the movable screw rod (403) is fixedly installed with a cross plate (409).

6. A diaphragm spring fatigue test device according to claim 5, characterized in that: A through hole (501) is provided at the central position of the top of the clamping plate (5), and the through hole (501) passes through the clamping plate (5), the through hole (501) corresponds to the position of the mounting sleeve (4), rectangular slots (502) are symmetrically provided on both sides of the top of the inner wall of the through hole (501), the rectangular slots (502) correspond to the position of the pressure clamping plate (406) and have the same shape, and clamping slots (503) are symmetrically provided on the bottom of both sides of the clamping plate (5), the clamping slots (503) correspond to the position of the rectangular clamping strip (305) and have the same shape.

7. The diaphragm spring fatigue test device according to claim 3, characterized in that: The mounting strip (6) has mounting grooves (601) symmetrically disposed at both ends, one end of the mounting groove (601) being connected to a movable groove (602), a fixed plug rod (603) being slidably mounted inside the mounting groove (601), and one end of the fixed plug rod (603) away from the movable groove (602) passes through the mounting groove (601) and extends to the outside of the mounting strip (6) corresponding to the position of the fixed plug hole (306).

8. A diaphragm spring fatigue test device according to claim 7, characterized in that: A limiting plate (604) is fixedly installed on the surface of the fixed plug rod (603) located inside the installation groove (601) and away from the movable groove (602); a fixing spring (605) is provided on the surface of the fixed plug rod (603) located inside the installation groove (601); a lever (606) is fixedly installed on one end of the fixed plug rod (603) located inside the movable groove (602); the lever (606) passes through the movable groove (602) and extends to the top of the installation strip (6); and a connecting strip (7) is fixedly installed between the levers (606) on both sides of the two groups of installation strips (6) that are opposite to each other.

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