Self-adaptive adjustment spring fatigue test equipment

Abstract

The invention relates to the related technical field of mechanical engineering, in particular to self-adaptive adjustment spring fatigue test equipment which comprises a shell, a host is fixedly connected to the surface of one side of the shell, and an operation key is slidably connected to the surface of one side of the host. Through the arrangement of the fixing mechanism, the design of multiple connecting rods can test multiple springs at the same time, and through the sliding connection of a vertical plate and the connecting rods and the design of a limiting groove, the first connecting rod, the second connecting rod and the third connecting rod can be precisely limited; the limiting effect can ensure that the spring always keeps stable position and direction in the compression and rebounding process, offset or shaking of the spring is reduced, in addition, through the synergistic effect of the positioning piece, the pull rod, the limiting spring and the positioning piece, accurate locking of the connecting piece can be achieved, and when the pull rod is inserted into the fixing groove, the connecting piece can be locked. The connecting piece can be firmly fixed at a required position, so that the risk of accidental rotation or displacement in the testing process is effectively reduced, and the testing accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field related to mechanical engineering, and in particular to a spring fatigue testing device with self-adaptive adjustment. Background Art

[0002] In the field of mechanical engineering, springs are key basic components, and their performance directly affects the reliability and stability of mechanical systems. From dynamic buffering in automotive suspension systems, to precise elastic connections in aerospace equipment, to shock-absorbing supports in high-end equipment, springs are widely used in various important areas of the national economy. Given that the fatigue performance of springs under cyclic loads plays a decisive role in the operational safety, durability, and service life of equipment, the development of high-precision spring fatigue testing equipment has become an industry focus. Spring fatigue testing equipment provides a quantitative basis for spring performance evaluation by simulating cyclic loads under real working conditions. Therefore, there is a particular need for a spring fatigue testing equipment with adaptive adjustment.

[0003] However, existing spring fatigue testing equipment lacks an effective limit constraint structure, and the spring is prone to lateral displacement and axial deviation under high-frequency reciprocating motion. Especially under long-term, high-intensity fatigue testing conditions, the accumulated offset of the spring due to continuous stress and deformation gradually increases. When the critical threshold is exceeded, there is a risk of the spring detaching from the test fixture and being ejected at high speed. This potential danger not only causes irreversible physical damage to the test equipment, but also seriously threatens the personal safety of the operator and may cause safety accidents such as mechanical injuries. It can also cause test data distortion and interrupt the test process, greatly affecting test efficiency and result reliability. Summary of the Invention

[0004] The purpose of the present invention is to provide a spring fatigue testing device with adaptive adjustment to solve the problem of the existing spring fatigue testing device proposed in the above background technology. Due to the lack of an effective limiting constraint structure, the spring is prone to lateral displacement and axial deviation under high-frequency reciprocating motion. Especially under long-term, high-intensity fatigue testing conditions, the accumulated offset of the spring due to continuous stress deformation gradually increases. When it exceeds the critical threshold, there is a risk of detaching from the test fixture and ejecting at high speed. This potential danger will not only cause irreversible physical damage to the test equipment, but also seriously threaten the personal safety of the operator, and may cause safety accidents such as mechanical injury. At the same time, it will also cause distortion of test data and interruption of the test process, greatly affecting the test efficiency and reliability of the results.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an adaptively adjustable spring fatigue testing device, comprising a shell, a mainframe fixedly connected to one side surface of the shell, an operation key slidably connected to one side surface of the mainframe, a display screen fixedly connected to one side surface of the mainframe, a bottom plate fixedly connected to the lower surface of the shell, a pulley fixedly connected to one side surface of the bottom plate, a sealing plate fixedly connected to one side surface of the sealing plate, a handle fixedly connected to one side surface of the shell, a side plate fixedly connected to one side surface of the shell, a testing mechanism provided on one side surface of the shell, and a fixing mechanism provided on one side surface of the shell; The fixing mechanism includes a support plate, the support plate being slidably connected to one side surface of the side plate, the upper surface of the support plate being fixedly connected to the base, one side surface of the base being fixedly connected to a rotating member, one side surface of the rotating member being rotatably connected to a connecting member, one side surface of the connecting member being fixedly connected to a handle, one side surface of the connecting member being provided with a fixing groove, one side surface of the connecting member being fixedly connected to a first connecting rod, one side surface of the connecting member being fixedly connected to a second connecting rod, one side surface of the connecting member being fixedly connected to a third connecting rod, one side surface of the third connecting rod being slidably connected to a vertical plate, one side surface of the vertical plate being provided with a limiting groove, one side surface of the base being fixedly connected to a positioning member, the inner surface of the positioning member being connected with a pull rod, the outer surface of the pull rod being slidably connected to a limiting spring, and the outer surface of the pull rod being fixedly connected to a positioning piece.

[0006] Preferably, the handles are provided with two of the same size and are distributed in parallel, and the pulleys are provided with four of the same size and are distributed symmetrically along the surface of one side of the bottom plate away from the shell.

[0007] Preferably, two side panels of the same size are provided and are symmetrically distributed along both sides of the support plate. The base and the connecting member are designed in a "7" shape, and the base, the connecting member and the rotating member are distributed parallel to each other.

[0008] Preferably, the first connecting rod, the second connecting rod and the third connecting rod are distributed in parallel, and the center radius of the third connecting rod is larger than that of the second connecting rod, and the center radius of the second connecting rod is larger than that of the first connecting rod. There are three limit grooves, which coincide with the center diameters of the first connecting rod, the second connecting rod and the third connecting rod.

[0009] Preferably, the pull rod, the limiting spring, the positioning plate and the positioning member are distributed in parallel, and the outer wall size of the end of the pull rod away from the positioning member is consistent with the inner wall size of the fixing groove.

[0010] Preferably, the center line of the handle and the center line of the pull rod are perpendicularly intersected, and the vertical plate and the connecting member are distributed in parallel.

[0011] Preferably, the testing mechanism includes a motor, which is fixedly connected to one side surface of the shell, a bidirectional threaded rod is fixedly connected to one side surface of the motor, a sliding piece is threadedly connected to the outer wall surface of the bidirectional threaded rod, an arc groove is provided on one side surface of the sliding piece, a groove is provided on one side surface of the sliding piece, a chute plate is slidably connected to one side surface of the sliding piece, a strip block is fixedly connected to one side surface of the chute, a guide rod is connected through one side surface of the guide rod, a fixed block is fixedly connected to one side surface of the guide rod, and a clamp is slidably connected to one side surface of the sliding piece.

[0012] Preferably, the outer wall size of the strip block matches the inner wall size of the groove, and two sliding sheets of the same size are provided and are symmetrically distributed along the center line of the bidirectional threaded rod.

[0013] Preferably, the bidirectional threaded rod, guide rod and side plate are distributed in parallel, and the arc grooves are provided in two groups of the same size, with three in each group, and are consistent with the outer wall sizes of the first connecting rod, the second connecting rod and the third connecting rod.

[0014] Preferably, the clips are provided in three groups, each group is provided with two clips of the same size, and the vertical center lines of the clips are perpendicularly intersected with the center line of the circle of the first connecting rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects: this kind of self-adaptive spring fatigue testing equipment, through the setting of the fixing mechanism, the multi-link design can test multiple springs at the same time, the sliding connection between the vertical plate and the connecting rod and the design of the upper limit groove of the vertical plate can accurately limit the first connecting rod, the second connecting rod and the third connecting rod. During the spring testing process, this limiting effect can ensure that the spring always maintains a stable position and direction during compression and rebound, reduces the offset or shaking of the spring, and thus ensures the accuracy and reliability of the test results. In addition, the coordinated action of the positioning part, the pull rod, the limiting spring and the positioning plate can achieve precise locking of the connecting part. When the pull rod is inserted into the fixing groove, the connecting part can be firmly fixed in the desired position, effectively reducing the risk of accidental rotation or displacement during the test and improving the test accuracy.

[0016] Through the setting of the test mechanism, the guide structure composed of the groove, bar block, guide rod and fixed block provides precise guiding effect for the movement of the sliding piece, ensuring that the sliding piece always maintains linear motion, effectively reducing the lateral deviation or swing of the sliding piece during movement, ensuring that the spring is evenly stressed during testing, and ensuring high precision and stability of the test. The arc groove opened by the sliding piece can limit the sliding piece through the connecting rod. At the same time, the design of the arc groove ensures that the connecting rod will not be restricted when rotating along the rotating part, ensuring the coordination between the test mechanism and the fixing mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the side panel separation of the present invention; Figure 3 This is a schematic diagram of the internal structure of the sealing plate separation of the present invention; Figure 4 This is a schematic diagram of the overall top view of the structure of the present invention; Figure 5 This is a schematic diagram of the split structure of the testing mechanism and the fixing mechanism of the present invention; Figure 6 This is a schematic diagram of the overall combined structure of the testing mechanism and the fixing mechanism of the present invention; Figure 7 This is a schematic diagram of the overall disassembled structure of the fixing mechanism of the present invention; Figure 8 This is a schematic diagram of the overall disassembly structure of the testing mechanism of the present invention; Figure 9 This is a schematic diagram of the top view of the partially disassembled testing mechanism and fixing mechanism of the present invention.

[0018] In the figure: 1. Housing; 2. Main unit; 3. Operation keys; 4. Display screen; 5. Bottom plate; 6. Pulley; 7. Closing plate; 8. Handle; 9. Side plate; 10. Testing mechanism; 1001. Motor; 1002. Bidirectional threaded rod; 1003. Sliding piece; 1004. Arc groove; 1005. Groove; 1006. Bar block; 1007. Entry plate; 1008. Guide rod; 1009. Fixing block; 1010. Clip ; 11. Fixing mechanism; 1101. Support plate; 1102. Base; 1103. Rotating member; 1104. Connecting member; 1105. Handle; 1106. Fixing slot; 1107. First connecting rod; 1108. Second connecting rod; 1109. Third connecting rod; 1110. Vertical plate; 1111. Limiting slot; 1112. Positioning member; 1113. Pull rod; 1114. Limiting spring; 1115. Positioning piece. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figures 1-9The present invention provides a technical solution: an adaptively adjustable spring fatigue testing device, comprising a shell 1, a main unit 2 is fixedly connected to one side surface of the shell 1, an operation key 3 is slidably connected to one side surface of the main unit 2, a display screen 4 is fixedly connected to one side surface of the main unit 2, a bottom plate 5 is fixedly connected to the lower surface of the shell 1, a pulley 6 is fixedly connected to one side surface of the bottom plate 5, a sealing plate 7 is fixedly connected to one side surface of the shell 1, a handle 8 is fixedly connected to one side surface of the sealing plate 7, a side plate 9 is fixedly connected to one side surface of the shell 1, a testing mechanism 10 is provided on one side surface of the shell 1, and a fixing mechanism 11 is provided on one side surface of the shell 1; The fixing mechanism 11 includes a support plate 1101, the support plate 1101 is slidably connected to a side surface of the side plate 9, the upper surface of the support plate 1101 is fixedly connected to a base 1102, a side surface of the base 1102 is fixedly connected to a rotating member 1103, a side surface of the rotating member 1103 is rotatably connected to a connecting member 1104, a side surface of the connecting member 1104 is fixedly connected to a handle 1105, a side surface of the connecting member 1104 is provided with a fixing groove 1106, a side surface of the connecting member 1104 is fixedly connected to a first connecting rod 1107, a side surface of the connecting member 1104 is fixedly connected to a second connecting rod 1108, and the connecting member 1104 is fixedly connected to the first connecting rod 1107. One side surface of the third connecting rod 1109 is fixedly connected, and one side surface of the third connecting rod 1109 is slidably connected to the vertical plate 1110. A limiting groove 1111 is provided on one side surface of the vertical plate 1110. One side surface of the base 1102 is fixedly connected to a positioning member 1112. The inner side surface of the positioning member 1112 is penetrated and connected with a pull rod 1113. The outer side surface of the pull rod 1113 is slidably connected to a limiting spring 1114. The outer side surface of the pull rod 1113 is fixedly connected to a positioning piece 1115. Through the support plate 1101, the base 1102, the rotating member 1103, the connecting member 1104, the handle 1105, the fixed groove 1106, the first connecting rod 11 07, the second connecting rod 1108, the third connecting rod 1109, the vertical plate 1110, the limiting groove 1111, the positioning member 1112, the pull rod 1113, the limiting spring 1114 and the positioning piece 1115 are set. When in use, observe the inner diameter width of the spring to be tested and select a suitable connecting rod according to the diameters of the first connecting rod 1107, the second connecting rod 1108 and the third connecting rod 1109, pull the pull rod 1113, so that the positioning member 1112 and the positioning piece 1115 squeeze the limiting spring 1114, and at the same time, the pull rod 1113 is away from the fixing groove 1106, and the handle 1105 is pushed to rotate the rotating member 1103 along the base 1102. Insert the clip 1010 corresponding to the spring and the connecting rod, push the handle 1105 again to reset the rotating part 1103, and at the same time, the limiting groove 1111 opened on the vertical plate 1110 restricts the first connecting rod 1107, the second connecting rod 1108 and the third connecting rod 1109. Release the pull rod 1113 to limit the spring 1114 to rebound and drive the positioning piece 1115 and the pull rod 1113 to reset. Insert the pull rod 1113 into the fixed groove 1106 to limit and fix the rotating part 1103. The connecting rod will limit the tested spring to ensure that its movement direction is fixed, effectively prevent the risk of spring deviation or even bouncing, and further reduce the safety hazards of the operator.

[0021] Furthermore, two handles 8 are provided with the same size and are distributed in parallel, and four pulleys 6 are provided with the same size and are symmetrically distributed along the side surface of the bottom plate 5 away from the shell 1. Through the arrangement of the handles 8 and the pulleys 6, when in use, when moving the equipment, the operator holds the handle 8 and applies force evenly. After the pulling force is applied, the force is transmitted to the four symmetrically distributed pulleys 6 through the bottom plate 5, causing the pulleys 6 to roll on the ground. The symmetrically distributed pulleys 6 ensure the balance of the equipment during movement and reduce the risk of the equipment tipping over due to unstable center of gravity.

[0022] Furthermore, the side panels 9 are provided with two of the same size, and are symmetrically distributed along both sides of the support plate 1101. The base 1102 and the connecting member 1104 are designed in a "7" shape, and the base 1102 and the connecting member 1104 are distributed parallel to the rotating member 1103. Through the setting of the rotating member 1103, the base 1102 and the connecting member 1104, when in use, the handle 1105 is pushed to make the connecting member 1104 rotate along the rotating member 1103. The "7"-shaped design effectively increases the fitting area between the connecting member 1104 and the rotating member 1103, thereby improving stability.

[0023] Furthermore, the first connecting rod 1107, the second connecting rod 1108 and the third connecting rod 1109 are distributed in parallel, and the center radius of the third connecting rod 1109 is larger than that of the second connecting rod 1108, and the center radius of the second connecting rod 1108 is larger than that of the first connecting rod 1107. There are three limiting grooves 1111, which coincide with the center diameters of the first connecting rod 1107, the second connecting rod 1108 and the third connecting rod 1109. Through the setting of the first connecting rod 1107, the second connecting rod 1108 and the third connecting rod 1109, when in use, the operator first selects a connecting rod of appropriate diameter from the first connecting rod 1107, the second connecting rod 1108 and the third connecting rod 1109 according to the inner diameter of the spring to be tested. The connecting rod will form an effective restriction on the spring to be tested. Through three connecting rods with different radii, springs with different inner diameter specifications can be accurately matched, which greatly improves the versatility of the equipment.

[0024] Furthermore, the pull rod 1113, the limiting spring 1114, the positioning plate 1115 and the positioning member 1112 are distributed in parallel, and the outer wall size of the end of the pull rod 1113 away from the positioning member 1112 is consistent with the inner wall size of the fixing groove 1106. Through the arrangement of the pull rod 1113, the limiting spring 1114, the positioning plate 1115 and the positioning member 1112, when in use, the operator pulls the pull rod 1113 outward, driving the positioning plate 1115 and the positioning member 1112 to squeeze the limiting spring 1114, so that the pull rod 1113 is freed from the constraint of the fixing groove 1106. At this time, the limiting spring 1114 is in a compressed state, providing elastic potential energy for subsequent reset and providing guarantee for the stability of the rotating member 1103.

[0025] Furthermore, the center line of the center of the handle 1105 is perpendicular to the center line of the center of the pull rod 1113, and the vertical plate 1110 and the connecting member 1104 are distributed in parallel. Through the setting of the vertical plate 1110 and the connecting member 1104, when in use, the vertical plate 1110 provides support to the first connecting rod 1107, the second connecting rod 1108 and the third connecting rod 1109 connected to one side of the connecting member 1104 through the limiting groove 1111, thereby ensuring the stability of the subsequent testing mechanism 10.

[0026] Furthermore, the testing mechanism 10 includes a motor 1001, which is fixedly connected to a side surface of the housing 1, a bidirectional threaded rod 1002 fixedly connected to a side surface of the motor 1001, a sliding piece 1003 threadedly connected to an outer wall surface of the bidirectional threaded rod 1002, an arc groove 1004 is provided on one side surface of the sliding piece 1003, a groove 1005 is provided on one side surface of the sliding piece 1003, a chute plate 1007 is slidably connected to one side surface of the sliding piece 1003, and a side surface of the chute plate 1007 is fixedly connected to the other side surface of the chute plate 1007. The strip block 1006 is connected, and the surface of the sliding piece 1003 is connected to the guide rod 1008 on one side, and the surface of the guide rod 1008 is fixedly connected to the fixing block 1009 on one side, and the surface of the sliding piece 1003 is slidably connected to the clamping piece 1010 on one side. Through the arrangement of the motor 1001, the bidirectional threaded rod 1002, the sliding piece 1003, the arc groove 1004, the groove 1005, the strip block 1006, the armature plate 1007, the guide rod 1008, the fixing block 1009 and the clamping piece 1010, when in use, the motor 10 01 drives the bidirectional threaded rod 1002 to rotate. Since the sliding piece 1003 is threadedly connected to the bidirectional threaded rod 1002, the sliding piece 1003 slides smoothly along the center of the bidirectional threaded rod 1002 under the rotation of the threaded rod. The sliding distance and speed can be accurately controlled by the speed of the motor 1001 and the pitch of the threaded rod. During the movement of the sliding piece 1003, the guide structure composed of the guide rod 1008 and the fixed block 1009 ensures that it always maintains linear motion. The clip 1010 is connected to the sliding piece 1003 by the guide rod 1008 and the fixed block 1009. Sliding connection, the sliding piece 1003 drives the clamping piece 1010 to reciprocate the spring along the outer wall of the connecting rod through the arc groove 1004, simulating the stress state of the spring under actual working conditions, and increasing stability through the cooperation between the groove 1005 and the strip block 1006 on the armature plate 1007. Through the design of multiple limit positions, it is ensured that the sliding piece 1003 and the clamping piece 1010 always run smoothly along the straight track of the connecting rod under the drive of the bidirectional threaded rod 1002, reducing the uneven stress on the spring caused by motion deviation, and effectively improving the accuracy of the test results.

[0027] Furthermore, the outer wall size of the strip block 1006 is consistent with the inner wall size of the groove 1005, and the sliding piece 1003 is provided with two of the same size, and is symmetrically distributed along the center line of the center of the circle of the bidirectional threaded rod 1002. Through the setting of the strip block 1006 and the groove 1005, when in use, the strip block 1006 will limit the sliding piece 1003 through the groove 1005, thereby improving the safety of the stability of the testing mechanism 10.

[0028] Furthermore, the bidirectional threaded rod 1002, the guide rod 1008 and the side plate 9 are distributed in parallel, and the arc groove 1004 is provided with two groups of the same size, each group is provided with three, and is consistent with the outer wall size of the first connecting rod 1107, the second connecting rod 1108 and the third connecting rod 1109. Through the setting of the arc groove 1004 and the first connecting rod 1107, the second connecting rod 1108 and the third connecting rod 1109, when in use, the arc groove 1004 will not hinder the sliding sheet 1003 from rotating the first connecting rod 1107, the second connecting rod 1108 and the third connecting rod 1109, thereby ensuring the smooth operation of the rotating part 1103.

[0029] Furthermore, three groups of clips 1010 are provided, and each group is provided with two clips of the same size. The vertical center line of the clip 1010 is perpendicular to the center line of the center of the circle of the first connecting rod 1107. Through the setting of the clip 1010, when in use, the clip 1010 will squeeze the spring under the drive of the sliding piece 1003, simulating the stress state of the spring under actual working conditions, which is equivalent to the sliding piece 1003 directly squeezing the spring. The clip 1010 can make the spring more evenly stressed, thereby ensuring the accuracy of the test experimental data.

[0030] Working principle: When carrying out the spring fatigue test, the operator first pulls the handle 8 to move the pulley 6 on the lower surface of the base plate 5 to the predetermined position, and then inserts the spring to be tested into the connecting rod through the fixing mechanism 11 to ensure that the contraction and rebound directions of the spring are fixed during the continuous extrusion process. By observing the inner diameter width of the spring to be tested, the operator selects the appropriate connecting rod according to the diameters of the first connecting rod 1107, the second connecting rod 1108 and the third connecting rod 1109, and pulls the pull rod 1113 so that the positioning piece 1112 and the positioning piece 1115 squeeze the limiting spring 1114. When the pull rod 1113 is away from the fixed groove 1106, the handle 1105 is pushed to rotate the rotating part 1103 along the base 1102, and the clip 1010 corresponding to the spring and the connecting rod is inserted in turn, and the handle 1105 is pushed again to reset the rotating part 1103. At the same time, the limiting groove 1111 provided on the vertical plate 1110 restricts the first connecting rod 1107, the second connecting rod 1108 and the third connecting rod 1109. The pull rod 1113 is released to limit the spring 1114 to rebound and drive the positioning piece 1115 and the pull rod 1113 to reset. The pull rod 1113 is inserted into the fixed groove 1106 to The moving part 1103 is restricted and fixed, and the test parameters are set through the operation key 3 on the host 2. The relevant data is then intuitively presented on the display screen 4. At this time, the motor 1001, as the power core of the test mechanism 10, starts to operate, driving the bidirectional threaded rod 1002 to rotate. Since the sliding piece 1003 is threadedly connected to the bidirectional threaded rod 1002, the sliding piece 1003 slides smoothly along the center of the bidirectional threaded rod 1002 under the rotation of the threaded rod. The sliding distance and speed can be accurately controlled by the speed of the motor 1001 and the pitch of the threaded rod. During the process, the guide structure composed of the guide rod 1008 and the fixed block 1009 ensures that it always maintains linear motion. The clip 1010 is connected to the sliding piece 1003 through sliding. The sliding piece 1003 drives the clip 1010 to reciprocate the spring along the outer wall of the connecting rod through the arc groove 1004, simulating the stress state of the spring under actual working conditions. The cooperation between the groove 1005 and the strip block 1006 on the armature plate 1007 further enhances the stability of the motion process. When carrying out the spring fatigue test, the use process of a self-adaptive spring fatigue test device is completed in this way.

[0031] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A self-adaptive spring fatigue testing device, comprising a housing (1), characterized in that: The housing (1) is fixedly connected to a main unit (2) on one side surface, an operating key (3) is slidably connected to an operating key (3) on one side surface of the main unit (2), a display screen (4) is fixedly connected to one side surface of the main unit (2), a bottom plate (5) is fixedly connected to a bottom surface of the housing (1), a pulley (6) is fixedly connected to one side surface of the bottom plate (5), a sealing plate (7) is fixedly connected to one side surface of the housing (1), a handle (8) is fixedly connected to one side surface of the sealing plate (7), a side plate (9) is fixedly connected to one side surface of the housing (1), a testing mechanism (10) is provided on one side surface of the housing (1), and a fixing mechanism (11) is provided on one side surface of the housing (1); The fixing mechanism (11) includes a support plate (1101), the support plate (1101) is slidably connected to a side surface of the side plate (9), the upper surface of the support plate (1101) is fixedly connected to a base (1102), a side surface of the base (1102) is fixedly connected to a rotating member (1103), a side surface of the rotating member (1103) is rotatably connected to a connecting member (1104), a side surface of the connecting member (1104) is fixedly connected to a handle (1105), a side surface of the connecting member (1104) is provided with a fixing groove (1106), a side surface of the connecting member (1104) is fixedly connected to a first connecting rod (1107), and the connecting member A second connecting rod (1108) is fixedly connected to one side surface of the (1104), a third connecting rod (1109) is fixedly connected to one side surface of the connecting member (1104), a vertical plate (1110) is slidably connected to one side surface of the third connecting rod (1109), a limiting groove (1111) is provided on one side surface of the vertical plate (1110), a positioning member (1112) is fixedly connected to one side surface of the base (1102), a pull rod (1113) is passed through the inner surface of the positioning member (1112), a limiting spring (1114) is slidably connected to the outer surface of the pull rod (1113), and a positioning plate (1115) is fixedly connected to the outer surface of the pull rod (1113).

2. The self-adaptive spring fatigue testing device according to claim 1, characterized in that: The handles (8) are provided with two of the same size and are distributed in parallel, and the pulleys (6) are provided with four of the same size and are distributed symmetrically along the surface of one side of the bottom plate (5) away from the housing (1).

3. The self-adaptive spring fatigue testing device according to claim 1, characterized in that: The side panels (9) are provided with two of the same size and are symmetrically distributed along both sides of the support plate (1101). The base (1102) and the connecting member (1104) are designed in a "7" shape, and the base (1102), the connecting member (1104) and the rotating member (1103) are distributed in parallel.

4. The self-adaptive spring fatigue testing device according to claim 1, characterized in that: The first connecting rod (1107), the second connecting rod (1108) and the third connecting rod (1109) are distributed in parallel, and the center radius of the third connecting rod (1109) is larger than that of the second connecting rod (1108), and the center radius of the second connecting rod (1108) is larger than that of the first connecting rod (1107). There are three limiting grooves (1111) and they coincide with the center diameters of the first connecting rod (1107), the second connecting rod (1108) and the third connecting rod (1109).

5. The self-adaptive spring fatigue testing device according to claim 1, characterized in that: The pull rod (1113), the limiting spring (1114), the positioning plate (1115) and the positioning member (1112) are distributed in parallel, and the outer wall size of the end of the pull rod (1113) away from the positioning member (1112) is consistent with the inner wall size of the fixing groove (1106).

6. The self-adaptive spring fatigue testing device according to claim 1, characterized in that: The center line of the handle (1105) and the center line of the pull rod (1113) are perpendicularly intersected, and the vertical plate (1110) and the connecting member (1104) are parallelly distributed.

7. The self-adaptive spring fatigue testing device according to claim 1, characterized in that: The testing mechanism (10) comprises a motor (1001), wherein the motor (1001) is fixedly connected to a side surface of the housing (1), a bidirectional threaded rod (1002) is fixedly connected to a side surface of the motor (1001), a sliding piece (1003) is threadedly connected to an outer wall surface of the bidirectional threaded rod (1002), an arc groove (1004) is provided on a side surface of the sliding piece (1003), a groove (1005) is provided on a side surface of the sliding piece (1003), a chute plate (1007) is slidably connected to a side surface of the sliding piece (1003), a strip block (1006) is fixedly connected to a side surface of the chute plate (1007), a guide rod (1008) is passed through and connected to a side surface of the guide rod (1008), a fixed block (1009) is fixedly connected to a side surface of the sliding piece (1003), and a clamping piece (1010) is slidably connected to a side surface of the sliding piece (1003).

8. The self-adaptive spring fatigue testing device according to claim 7, characterized in that: The outer wall size of the strip block (1006) matches the inner wall size of the groove (1005), and the sliding piece (1003) is provided with two pieces of the same size, which are symmetrically distributed along the center line of the bidirectional threaded rod (1002).

9. The self-adaptive spring fatigue testing device according to claim 7, characterized in that: The bidirectional threaded rod (1002), the guide rod (1008) and the side plate (9) are distributed in parallel, and the arc groove (1004) is provided in two groups of the same size, with three arc grooves in each group, and the arc grooves are consistent with the outer wall sizes of the first connecting rod (1107), the second connecting rod (1108) and the third connecting rod (1109).

10. The self-adaptive spring fatigue testing device according to claim 7, characterized in that: The clips (1010) are provided in three groups, each group being provided with two clips of the same size, and the vertical centerline of the clips (1010) is perpendicularly intersected with the centerline of the circle of the first connecting rod (1107).

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