A clamping mechanism for shrapnel fatigue testing

Abstract

This utility model discloses a clamping mechanism for spring fatigue testing, relating to the field of spring testing technology. It includes a testing machine body and a spring body. A spring centering and anti-detachment mechanism and a testing mechanism are arranged in the upper middle part of the testing machine body. The testing mechanism is located behind the spring centering and anti-detachment mechanism. The spring centering and anti-detachment mechanism includes a placement box with a placement groove in the upper middle part of the placement box. The spring body is inserted into the inner wall of the placement groove. The spring centering and anti-detachment mechanism is used to perform a centering and clamping action on the spring body, and the testing mechanism is used to perform a testing action on the spring body. This utility model, through the spring centering and anti-detachment mechanism, can stably clamp the spring body between two symmetrically arranged limiting clamps, preventing instability of the spring body during testing and improving the stability of the spring body during the testing process.

Description

Technical Field

[0001] This utility model relates to the field of spring testing technology, specifically a clamping mechanism for spring fatigue testing. Background Technology

[0002] The application of springs is becoming more and more widespread, and the reliability of springs is also receiving some attention. After a certain period of time, springs may fatigue and break, or their elasticity may weaken or even fail. A small part can even affect the operation of the entire equipment.

[0003] For example, the utility model patent with publication number CN218726264U discloses a metal spring fatigue testing device, which relates to the field of spring fatigue testing technology. The metal spring fatigue testing device includes a testing machine, a base is provided at the bottom of the testing machine, a control console is provided on one side of the testing machine, a display screen is provided at one end of the testing machine and on the side near the control console, a bracket is fixedly installed on the top of the testing machine, a testing component is provided on the inner side of the bracket, the testing component is mainly used to test the spring, and a clamping component is provided on the top of the testing machine. This metal spring fatigue testing device controls the speed of the drive motor by pressing a button on the control panel, thereby adjusting the folding frequency of the metal spring. The speed and running time of the drive motor are displayed on the screen to obtain test data, thus achieving the effect of testing the metal spring and judging its service life. However, when the metal spring is pressed and rebounded during testing, vibration is transmitted through the clamping block to the positioning block and fastening bolts. During this process, the vibration can cause the fastening bolts to loosen, ultimately leading to unstable results in subsequent tests. To address this, we propose a clamping mechanism for spring fatigue testing. Utility Model Content

[0004] The purpose of this invention is to provide a clamping mechanism for spring fatigue testing to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a clamping mechanism for spring fatigue testing, comprising a testing machine body and a spring body. The upper middle part of the testing machine body is provided with a spring centering and limiting anti-detachment mechanism and a testing mechanism. The testing mechanism is located behind the spring centering and limiting anti-detachment mechanism. The spring centering and limiting anti-detachment mechanism includes a placement box, with a placement groove formed in the upper middle part of the placement box. A spring body is inserted into the inner wall of the placement groove. The spring centering and limiting anti-detachment mechanism is used to perform a centering and limiting clamping action on the spring body, and the testing mechanism is used to perform a testing action on the spring body.

[0006] Preferably, the spring-loaded centering and anti-detachment mechanism further includes a U-shaped frame. The lower end of the U-shaped frame is fixedly installed with the testing machine body. A first stepper motor is fixedly installed in the middle of the lower end of the U-shaped frame. A first rotating shaft is fixedly installed at the output end of the first stepper motor. A rotating gear is fixedly installed at the upper end of the first rotating shaft. Two centrally symmetrically arranged movable racks are meshed with the outer end of the rotating gear. A vertical plate is fixedly installed at the two movable racks at their ends away from each other. A guide post is fixedly installed at the upper inner side of each vertical plate. A placement box is slidably connected to the outer end of the guide post. A contact post is fixedly installed at each corner of the lower end of the placement box. The testing machine body is fixedly installed at the lower end of the contact post. A limit clamp is fixedly installed at the end of each of the two guide posts that are close to each other.

[0007] Preferably, the testing mechanism includes an L-shaped fixing frame. The testing machine body is fixedly installed at the lower end of the L-shaped fixing frame, and a side plate is fixedly installed at the upper end of the L-shaped fixing frame. A second stepper motor is fixedly installed at the rear end of the side plate. A second rotating shaft is fixedly installed at the output end of the second stepper motor. A rotating plate is fixedly installed at the front end of the second rotating shaft. Two circumferentially distributed contact heads are fixedly installed at the outer end of the rotating plate. A guide post is provided at the lower end of the contact head. The L-shaped fixing frame is slidably connected to the outer end of the guide post. A movable component is fixedly installed at the lower end of the guide post. A spring is fixedly installed at the upper end of the movable component. The L-shaped fixing frame is fixedly installed at the upper end of the spring. The spring is sleeved on the guide post.

[0008] Preferably, each corner of the lower end of the testing machine body is fixedly equipped with a bracket, and each bracket is fixedly equipped with an anti-slip pad at its lower end.

[0009] Preferably, the outer end of the first rotating shaft is rotatably connected to the U-shaped frame via a bearing, and the first rotating shaft passes through the U-shaped frame.

[0010] Preferably, the outer end of the second rotating shaft is rotatably connected to the side plate via a bearing, and the second rotating shaft passes through the side plate.

[0011] Preferably, the front end of the testing machine body is provided with a display screen and control buttons, and the control buttons are located on one side of the display screen.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model uses a spring-centered limiting and anti-detachment mechanism to place the spring body between two symmetrically arranged limiting clamps. Next, the first stepper motor is started, and its output drives the first rotating shaft to rotate. This first rotating shaft then drives a rotating gear to rotate counterclockwise. The rotating gear drives two centrally symmetrically arranged moving racks to move closer together. Each moving rack drives a vertical plate and a guide post to move. The guide post slides against the placement box. The moving racks then drive the limiting clamps to centrally limit and clamp the spring body, preventing instability of the spring body during testing and improving the stability of the spring body during testing.

[0014] 2. This utility model can start the second stepper motor through the testing mechanism. At this time, the output end of the second stepper motor drives the second rotating shaft to rotate, which in turn drives the rotating plate to rotate. At this time, the rotating plate drives the two contact heads set with stingers to rotate intermittently. During this process, each contact head contacts the guide post. At this time, the guide post moves up and down reciprocally. The guide post drives the moving part to move up and down reciprocally. At this time, the lower end of the moving part presses the spring body reciprocally. The moving part drives the spring to perform reciprocating compression and rebound. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of the spring clip centering and limiting anti-detachment mechanism of this utility model;

[0017] Figure 3 This is a schematic diagram of the testing mechanism structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the display screen structure of this utility model.

[0019] In the diagram: 1. Test machine body; 2. Bracket; 3. Anti-slip pad; 4. Display screen; 5. Control button; 6. Spring centering limit anti-disengagement mechanism; 61. U-shaped frame; 62. First stepper motor; 63. First rotating shaft; 64. Rotating gear; 65. Moving rack; 66. Vertical plate; 67. Guide post; 68. Limiting clamp; 69. Placement box; 610. Contact post; 611. Placement slot; 7. Test mechanism; 71. L-shaped fixing frame; 72. Side plate; 73. Second stepper motor; 74. Second rotating shaft; 75. Rotating plate; 76. Contact head; 77. Guide post; 78. Moving part; 79. Spring; 8. Spring body. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1 - Figure 4 This utility model provides a technical solution: a clamping mechanism for spring fatigue testing, including a testing machine body 1 and a spring body 8. The upper middle part of the testing machine body 1 is provided with a spring centering limit and anti-disengagement mechanism 6 and a testing mechanism 7. The testing mechanism 7 is located behind the spring centering limit and anti-disengagement mechanism 6. The spring centering limit and anti-disengagement mechanism 6 includes a placement box 69. The upper middle part of the placement box 69 is provided with a placement groove 611. The spring body 8 is inserted into the inner wall of the placement groove 611. The spring centering limit and anti-disengagement mechanism 6 is used to perform a centering limit clamping action on the spring body 8. The testing mechanism 7 is used to perform a testing action on the spring body 8.

[0022] In this embodiment, the spring-centered limiting and anti-detachment mechanism 6 also includes a U-shaped frame 61. The lower end of the U-shaped frame 61 is fixedly installed with the test machine body 1. The middle of the lower end of the U-shaped frame 61 is fixedly installed with a first stepper motor 62. The output end of the first stepper motor 62 is fixedly installed with a first rotating shaft 63. The upper end of the first rotating shaft 63 is fixedly installed with a rotating gear 64. The outer end of the rotating gear 64 is meshed with two centrally symmetrically arranged movable racks 65. The two movable racks 65 are fixedly installed with vertical plates 66 at their ends away from each other. The upper inner side of each vertical plate 66 is fixedly installed with a guide post 67. The outer end of the guide post 67 is slidably connected to a placement box 69. The lower corner of the placement box 69 is fixedly installed with a contact post 610. The lower end of the contact post 610 is fixedly installed with the test machine body 1. The two guide posts 67 are fixedly installed with limiting clamps 68 at their ends close to each other.

[0023] Specifically, the spring body 8 can be placed between two symmetrically arranged limiting clamps 68 by the spring body centering and limiting anti-detachment mechanism 6. Next, the first stepper motor 62 is started. At this time, the output end of the first stepper motor 62 drives the first rotating shaft 63 to rotate. The first rotating shaft 63 drives the rotating gear 64 to rotate counterclockwise. The rotating gear 64 drives two centrally symmetrically arranged moving racks 65 to move closer to each other. Each moving rack 65 drives the vertical plate 66 and the guide post 67 to move. At this time, the guide post 67 slides with the placement box 69. The moving racks 65 drive the limiting clamps 68 to center and clamp the spring body 8, preventing the spring body 8 from becoming unstable during the test by the testing mechanism 7, and improving the stability of the spring body 8 during the test.

[0024] In this embodiment, the testing mechanism 7 includes an L-shaped fixing frame 71. The testing machine body 1 is fixedly installed at the lower end of the L-shaped fixing frame 71. A side plate 72 is fixedly installed at the upper end of the L-shaped fixing frame 71. A second stepper motor 73 is fixedly installed at the rear end of the side plate 72. A second rotating shaft 74 is fixedly installed at the output end of the second stepper motor 73. A rotating plate 75 is fixedly installed at the front end of the second rotating shaft 74. Two circumferentially distributed contact heads 76 are fixedly installed at the outer end of the rotating plate 75. A guide post 77 is provided at the lower end of the contact head 76. The L-shaped fixing frame 71 is slidably connected to the outer end of the guide post 77. A moving part 78 is fixedly installed at the lower end of the guide post 77. A spring 79 is fixedly installed at the upper end of the moving part 78. The L-shaped fixing frame 71 is fixedly installed at the upper end of the spring 79. The guide post 77 is sleeved on the spring 79.

[0025] Specifically, the second stepper motor 73 can be started through the testing mechanism 7. At this time, the output end of the second stepper motor 73 drives the second rotating shaft 74 to rotate, which in turn drives the rotating plate 75 to rotate. The rotating plate 75 drives the two contact heads 76 with stingers to rotate intermittently. During this process, each contact head 76 contacts the guide post 77. The guide post 77 moves back and forth up and down. The guide post 77 drives the moving part 78 to move back and forth up and down. The lower end of the moving part 78 presses the spring body 8 back and forth. The moving part 78 drives the spring 79 to perform a back and forth compression and rebound action.

[0026] In this embodiment, each corner of the lower end of the test machine body 1 is fixedly equipped with a bracket 2, and each bracket 2 is fixedly equipped with an anti-slip pad 3 at its lower end.

[0027] Specifically, the stability of the test machine body 1 can be improved by using the bracket 2 and the anti-slip pad 3.

[0028] In this embodiment, the outer end of the first rotating shaft 63 is rotatably connected to the U-shaped frame 61 through a bearing, and the first rotating shaft 63 passes through the U-shaped frame 61.

[0029] Specifically, ensure that the first rotating shaft 63 does not interfere with the U-shaped frame 61 during rotation.

[0030] In this embodiment, the outer end of the second rotating shaft 74 is rotatably connected to the side plate 72 via a bearing, and the second rotating shaft 74 passes through the side plate 72.

[0031] Specifically, ensure that the second rotating shaft 74 does not interfere with the side plate 72 during rotation.

[0032] In this embodiment, the front end of the testing machine body 1 is provided with a display screen 4 and a control button 5, with the control button 5 located on one side of the display screen 4.

[0033] Specifically, the test data can be displayed on screen 4.

[0034] Working principle: First, the spring body 8 is placed between two symmetrically arranged limiting clamps 68. Next, the first stepper motor 62 is started. The output of the first stepper motor 62 drives the first rotating shaft 63 to rotate. The first rotating shaft 63 drives the rotating gear 64 to rotate counterclockwise. The rotating gear 64 drives two centrally symmetrically arranged moving racks 65 to move closer to each other. Each moving rack 65 drives the vertical plate 66 and the guide post 67 to move. At this time, the guide post 67 slides against the placement box 69. The moving racks 65 drive the limiting clamps 68 to push the spring body 8 into the space. After the centering and clamping action is completed, the second stepper motor 73 is started. At this time, the output end of the second stepper motor 73 drives the second rotating shaft 74 to rotate, which in turn drives the rotating plate 75 to rotate. The rotating plate 75 drives the two contact heads 76 with stingers to rotate intermittently. During this process, each contact head 76 contacts the guide post 77. The guide post 77 moves up and down reciprocally. The guide post 77 drives the moving part 78 to move up and down reciprocally. At this time, the lower end of the moving part 78 presses the spring body 8 reciprocally. The moving part 78 drives the spring 79 to perform a reciprocating compression and rebound action.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clamping mechanism for sheet metal fatigue testing, comprising a testing machine body (1) and a sheet metal body (8), characterized in that: The upper middle part of the test machine body (1) is provided with a spring sheet centering limit anti-detachment mechanism (6) and a test mechanism (7). The test mechanism (7) is located on the rear side of the spring sheet centering limit anti-detachment mechanism (6). The spring sheet centering limit anti-detachment mechanism (6) includes a placement box (69). The upper middle part of the placement box (69) is provided with a placement groove (611). The inner wall of the placement groove (611) is inserted with a spring sheet body (8). The spring sheet centering limit anti-detachment mechanism (6) is used to perform a centering limit clamping action on the spring sheet body (8). The test mechanism (7) is used to perform a test action on the spring sheet body (8).

2. The clamping mechanism for spring fatigue testing according to claim 1, characterized in that: The spring clip centering and anti-detachment mechanism (6) also includes a U-shaped frame (61). The lower end of the U-shaped frame (61) is fixedly installed with the test machine body (1). The middle of the lower end of the U-shaped frame (61) is fixedly installed with a first stepper motor (62). The output end of the first stepper motor (62) is fixedly installed with a first rotating shaft (63). The upper end of the first rotating shaft (63) is fixedly installed with a rotating gear (64). The outer end of the rotating gear (64) is meshed with two centrally symmetrically arranged moving racks (64). 5) Vertical plates (66) are fixedly installed at the ends of the two moving racks (65) that are far apart from each other. A guide post (67) is fixedly installed at the upper inner side of each vertical plate (66). The outer end of the guide post (67) is slidably connected to the placement box (69). A contact post (610) is fixedly installed at each corner of the lower end of the placement box (69). The lower end of the contact post (610) is fixedly installed with the test machine body (1). Limiting clamps (68) are fixedly installed at the ends of the two guide posts (67) that are close to each other.

3. The clamping mechanism for spring fatigue testing according to claim 1, characterized in that: The testing mechanism (7) includes an L-shaped fixing frame (71), the lower end of which is fixedly installed with the testing machine body (1), the upper end of which is fixedly installed with a side plate (72), the rear end of which is fixedly installed with a second stepper motor (73), the output end of which is fixedly installed with a second rotating shaft (74), the front end of which is fixedly installed with a rotating plate (75), the outer end of which is fixedly installed with two circumferentially distributed contact heads (76), the lower end of which is provided with a guide post (77), the outer end of which is slidably connected to the L-shaped fixing frame (71), the lower end of which is fixedly installed with a moving part (78), the upper end of which is fixedly installed with a spring (79), the upper end of which is fixedly installed with the L-shaped fixing frame (71), and the spring (79) sleeved on the guide post (77).

4. The clamping mechanism for spring fatigue testing according to claim 1, characterized in that: Each corner of the lower end of the test machine body (1) is fixedly equipped with a bracket (2), and each bracket (2) is fixedly equipped with an anti-slip pad (3) at the lower end.

5. The clamping mechanism for spring fatigue testing according to claim 2, characterized in that: The outer end of the first rotating shaft (63) is rotatably connected to the U-shaped frame (61) through a bearing, and the first rotating shaft (63) passes through the U-shaped frame (61).

6. The clamping mechanism for spring fatigue testing according to claim 3, characterized in that: The outer end of the second rotating shaft (74) is rotatably connected to the side plate (72) through a bearing, and the second rotating shaft (74) passes through the side plate (72).

7. The clamping mechanism for spring fatigue testing according to claim 1, characterized in that: The front end of the test machine body (1) is provided with a display screen (4) and a control button (5), and the control button (5) is located on one side of the display screen (4).

Images