Staged damping device

Abstract

The utility model discloses a graded damping device which comprises an anti-seismic experiment table, a fixing plate used for fixing a detection piece is installed at the top end of the anti-seismic experiment table, a base used for bearing the anti-seismic experiment table is installed at the bottom of the anti-seismic experiment table, and damping operation is conducted on vertical vibration through vertical damping springs. Front-back and left-right vibration generated by the anti-seismic experiment table is transmitted through a transmission rod, one end, far away from the anti-seismic experiment table, of the transmission rod moves, and a second damping spring and a first damping spring change in different degrees, so that two-time graded damping of the anti-seismic experiment table is realized, and the vibration generated by the anti-seismic experiment table is divided into two parts for damping; the damping effect on the anti-seismic experiment table is improved, meanwhile, the telescopic speed of a first damping spring and a second damping spring is reduced, the service life of the first damping spring and the second damping spring is prolonged, and then the service life of the damping device is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of earthquake resistance testing, in particular to a graded shock absorbing device. Background Art

[0002] The seismic test is a test to detect the seismic performance of the test parts by simulating various types of vibrations. It can detect the structural strength and fatigue life of the product. Therefore, a seismic test bench is required to simulate the required vibration form.

[0003] When the seismic test bench is in use, the required vibration form can be simulated. However, while the seismic test bench vibrates the product, it also vibrates itself. Therefore, a shock absorbing device is required to reduce the vibration of the seismic test bench. However, the shock absorbing devices of the existing seismic test benches mostly use multiple shock absorbing springs with the same function to reduce the vibration of the seismic test bench. Long-term use will cause excessive wear of the shock absorbing springs, reducing the shock absorbing effect. Utility Model Content

[0004] The purpose of the utility model is to provide a graded shock absorbing device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a graded shock-absorbing device, comprising a seismic test bench, a fixing plate for fixing a detection piece is installed at the top of the seismic test bench, a base for carrying the seismic test bench is installed at the bottom of the seismic test bench, a vertical shock-absorbing component for vertically absorbing the seismic test bench is installed between the bottom of the seismic test bench and the inner wall of the bottom end of the base, a transmission rod is rotatably installed around the seismic test bench through an axle pin, moving blocks are symmetrically installed on both sides of one end of the transmission rod away from the seismic test bench, a first-level shock-absorbing component for absorbing the seismic test bench is installed between the moving block and the transmission rod, a second-level shock-absorbing component for absorbing the seismic test bench is installed between the moving block and the inner wall of the bottom end of the base, and a damper is installed between the bottom of the seismic test bench and the middle inner part of the base.

[0006] As a further preferred embodiment of the present technical solution, the vertical shock absorbing assembly includes a fixed column, a fixed cylinder and a vertical shock absorbing spring. The fixed column is symmetrically fixedly installed on the bottom of the seismic test bench, and a fixed cylinder is fixedly installed on the inner wall of the bottom end of the base at a position corresponding to the fixed column. The fixed column is movably installed inside the fixed cylinder, and a vertical shock absorbing spring is fixedly installed on the bottom end of the fixed column, and one end of the vertical shock absorbing spring away from the fixed column is fixedly connected to the inner wall of the bottom end of the fixed cylinder.

[0007] As a further preferred embodiment of the present technical solution, the first-level shock-absorbing assembly includes a slide groove, a slider, a first limiting hole, a mounting block, a first limiting rod and a first shock-absorbing spring. A slide groove is provided in the middle of one end of the transmission rod away from the seismic test bench, and a slider is slidably installed inside the slide groove. The movable block is movably installed on both sides of the slider. First limiting holes are symmetrically provided on both sides of the slider. Mounting blocks are symmetrically fixedly installed on both sides of the transmission rod, a first limiting rod is fixedly installed between two mounting blocks on the same side, the first limiting rod is slidably connected to the first limiting hole, and a first shock-absorbing spring is sleeved on the outer side of the top end of the first limiting rod, one end of the first shock-absorbing spring is fixedly connected to the slider, and the other end of the first shock-absorbing spring is fixedly connected to the mounting block.

[0008] As a further preferred embodiment of the technical solution, positioning rods are symmetrically fixedly installed on both sides of the sliding block, and a positioning hole is opened at the top of the moving block, and the positioning hole is slidably and rotatably connected to the positioning rod.

[0009] As a further preferred embodiment of the present technical solution, the secondary shock absorbing assembly includes a second limiting hole, a second limiting rod and a second shock absorbing spring. A second limiting hole is opened at the bottom end of the moving block, and a second limiting rod is fixedly installed on the side wall of the base and the inner wall of the bottom end of the base at the position of the moving block corresponding to the position of the moving block. The second limiting rod is slidably connected to the second limiting hole, and a second shock absorbing spring is sleeved on the outer side of one end of the second limiting rod away from the side wall of the base, one end of the second shock absorbing spring is fixedly connected to the moving block, and the other end of the second shock absorbing spring is fixedly connected to the end of the second limiting rod away from the base.

[0010] As a further preferred embodiment of the present technical solution, a pulling spring is fixedly installed between the upper surface of the transmission rod and the side wall of the base.

[0011] As a further preferred embodiment of the present technical solution, an isolation plate is fixedly mounted on the top of the base.

[0012] The utility model provides a hierarchical shock absorbing device, which has the following beneficial effects:

[0013] (1) The utility model uses a fixed column that moves inside a fixed cylinder and uses a vertical damping spring to damp vertical vibration;

[0014] (2) The utility model transmits the front, rear, left and right vibrations generated by the earthquake-resistant test bench through a transmission rod. The end of the transmission rod away from the earthquake-resistant test bench will move. At this time, in order to maintain the horizontal position, the moving block will slide along the outer side of the second limit rod. At this time, the second shock-absorbing spring will change to perform a shock-absorbing operation on the movement of the moving block. At the same time, the sliding block connected to the moving block will slide inside the sliding groove, and the positioning rod will rotate inside the positioning hole. At this time, the first shock-absorbing spring will change to perform a shock-absorbing operation on the rotation of the transmission rod, thereby realizing a two-stage shock absorption of the earthquake-resistant test bench, dividing the vibration generated by the earthquake-resistant test bench into two parts for shock absorption, thereby improving the shock absorption effect of the earthquake-resistant test bench, and at the same time slowing down the expansion and contraction speed of the first shock-absorbing spring and the second shock-absorbing spring, thereby increasing the service life of the first shock-absorbing spring and the second shock-absorbing spring, thereby increasing the service life of the shock-absorbing device. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 It is one of the partial structural schematic diagrams of the utility model;

[0017] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0018] Figure 4 This is the second schematic diagram of the partial structure of the utility model;

[0019] Figure 5 This is the third schematic diagram of the partial structure of the utility model;

[0020] Figure 6 This is the fourth schematic diagram of the partial structure of the utility model;

[0021] In the figure: 1. earthquake-resistant test bench; 2. fixed plate; 3. base; 4. transmission rod; 5. moving block; 6. fixed column; 7. fixed cylinder; 8. vertical shock-absorbing spring; 9. slide groove; 10. slider; 11. first limiting hole; 12. mounting block; 13. first limiting rod; 14. first shock-absorbing spring; 15. positioning rod; 16. positioning hole; 17. second limiting hole; 18. second limiting rod; 19. second shock-absorbing spring; 20. pulling spring; 21. isolation plate; 22. damper. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0023] The utility model provides a technical solution: Figures 1 to 6As shown, in this embodiment, a graded shock absorbing device includes a seismic test platform 1, a fixing plate 2 for fixing a detection member is installed at the top of the seismic test platform 1, a base 3 for carrying the seismic test platform 1 is installed at the bottom of the seismic test platform 1, a vertical shock absorbing component for vertically absorbing the seismic test platform 1 is installed between the bottom of the seismic test platform 1 and the bottom inner wall of the base 3, a transmission rod 4 is rotatably installed around the seismic test platform 1 through an axle pin, and moving blocks 5 are symmetrically installed on both sides of one end of the transmission rod 4 away from the seismic test platform 1, a first-level shock absorbing component for absorbing the seismic test platform 1 is installed between the moving block 5 and the transmission rod 4, a second-level shock absorbing component for absorbing the seismic test platform 1 is installed between the moving block 5 and the bottom inner wall of the base 3, and a damper 22 is installed between the bottom of the seismic test platform 1 and the middle inner part of the base 3.

[0024] like Figure 5 and Figure 6 As shown, the vertical shock absorbing assembly includes a fixed column 6, a fixed cylinder 7 and a vertical shock absorbing spring 8. The fixed column 6 is symmetrically fixedly installed on the bottom of the seismic test bench 1, and the fixed cylinder 7 is fixedly installed on the inner wall of the bottom end of the base 3 corresponding to the position of the fixed column 6. The fixed column 6 is movably installed inside the fixed cylinder 7, and the vertical shock absorbing spring 8 is fixedly installed on the bottom end of the fixed column 6. The end of the vertical shock absorbing spring 8 away from the fixed column 6 is fixedly connected to the inner wall of the bottom end of the fixed cylinder 7.

[0025] When the earthquake-resistant test bench 1 generates vertical vibration, the fixed column 6 moves inside the fixed cylinder 7 and performs a shock-absorbing operation on the vertical vibration through the vertical shock-absorbing spring 8 .

[0026] like Figures 1 to 4 As shown, the first-level shock-absorbing assembly includes a slide groove 9, a slider 10, a first limiting hole 11, a mounting block 12, a first limiting rod 13 and a first shock-absorbing spring 14. A slide groove 9 is provided in the middle of one end of the transmission rod 4 away from the seismic test bench 1. The slider 10 is slidably installed inside the slide groove 9. The moving block 5 is movably installed on both sides of the slider 10. The first limiting holes 11 are symmetrically provided on both sides of the slider 10. The mounting blocks 12 are symmetrically fixedly installed on both sides of the transmission rod 4. A first limiting rod 13 is fixedly installed between the two mounting blocks 12 on the same side. The first limiting rod 13 is slidably connected to the first limiting hole 11. The first shock-absorbing spring 14 is sleeved on the outer side of the top end of the first limiting rod 13. One end of the first shock-absorbing spring 14 is fixedly connected to the slider 10, and the other end of the first shock-absorbing spring 14 is fixedly connected to the mounting block 12.

[0027] When the earthquake-resistant test bench 1 vibrates forward, backward, left and right, the slider 10 connected to the moving block 5 will slide inside the slide groove 9, and the positioning rod 15 will rotate inside the positioning hole 16. At this time, the first shock-absorbing spring 14 will change to perform a shock-absorbing operation on the rotation of the transmission rod 4.

[0028] like Figures 1 to 4 As shown, positioning rods 15 are symmetrically fixedly installed on both sides of the slider 10, and a positioning hole 16 is opened at the top of the moving block 5. The positioning hole 16 is connected to the positioning rod 15 in a sliding and rotatable manner.

[0029] like Figures 1 to 4 As shown, the secondary shock absorbing assembly includes a second limiting hole 17, a second limiting rod 18 and a second shock absorbing spring 19. The bottom end of the moving block 5 is provided with a second limiting hole 17. The side wall of the base 3 and the inner wall of the bottom end of the base 3 are fixedly installed with a second limiting rod 18 at the position of the moving block 5 corresponding to the position of the moving block 5. The second limiting rod 18 is slidably connected to the second limiting hole 17. A second shock absorbing spring 19 is sleeved on the outer side of one end of the second limiting rod 18 away from the side wall of the base 3. One end of the second shock absorbing spring 19 is fixedly connected to the moving block 5, and the other end of the second shock absorbing spring 19 is fixedly connected to one end of the second limiting rod 18 away from the base 3.

[0030] When the earthquake-resistant test platform 1 vibrates in the front, back, left and right directions, the transmission rod 4 will transmit the vibration generated by the earthquake-resistant test platform 1, and the end of the transmission rod 4 away from the earthquake-resistant test platform 1 will move. At this time, in order to maintain the horizontal position unchanged, the moving block 5 will slide along the outer side of the second limit rod 18. At this time, the second shock-absorbing spring 19 will change to perform a shock-absorbing operation on the movement of the moving block 5.

[0031] like Figures 1 to 4 As shown, a pulling spring 20 is fixedly installed between the upper surface of the transmission rod 4 and the side wall of the base 3.

[0032] When the earthquake-resistant test platform 1 vibrates, the earthquake-resistant test platform 1 will move in different directions. The eight pulling springs 20 can pull the earthquake-resistant test platform 1 to further reduce the vibration of the earthquake-resistant test platform 1 .

[0033] like Figure 1 As shown, an isolation plate 21 is fixedly mounted on the top of the base 3 .

[0034] The vertical shock absorbing assembly, the primary shock absorbing assembly and the secondary shock absorbing assembly can be isolated and protected by the isolation plate 21 to prevent foreign objects from falling.

[0035] The utility model provides a hierarchical shock absorbing device, and the specific working principle is as follows:

[0036] When the device is in use, when the earthquake-resistant test bench 1 vibrates, the damper 22 is operated to slow down the vibration of the earthquake-resistant test bench 1. Under vertical vibration, the fixed column 6 will move inside the fixed cylinder 7, and the vertical vibration will be damped by the vertical damping spring 8. Under front, back, left, and right vibrations, the transmission rod 4 will transmit the vibration generated by the earthquake-resistant test bench 1, and the end of the transmission rod 4 away from the earthquake-resistant test bench 1 will move. At this time, in order to keep the horizontal position unchanged, the moving block 5 will slide along the outer side of the second limit rod 18. At this time, the second damping spring 19 will change to damp the movement of the moving block 5. At the same time, the slider 10 connected to the moving block 5 will slide inside the slide groove 9, and the positioning rod 15 will rotate inside the positioning hole 16. At this time, the first shock-absorbing spring 14 will change, which is used to perform a shock-absorbing operation on the rotation of the transmission rod 4, so as to realize the double-stage shock absorption of the anti-seismic test bench 1, and divide the vibration generated by the anti-seismic test bench 1 into two parts for shock absorption, thereby improving the shock absorption effect of the anti-seismic test bench 1, and at the same time slowing down the expansion and contraction speed of the first shock-absorbing spring 14 and the second shock-absorbing spring 19, thereby increasing the service life of the first shock-absorbing spring 14 and the second shock-absorbing spring 19, and thus increasing the service life of the shock-absorbing device;

[0037] When the transmission rod 4 transmits the vibration generated by the seismic test bench 1, the transmission rod 4 will also move in different directions, and at this time, it will drive the positioning rod 15 connected to the slider 10 to slide inside the positioning hole 16, ensuring that the first shock-absorbing spring 14 and the second shock-absorbing spring 19 always perform shock-absorbing operations on different vibration directions.

[0038] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hierarchical shock absorbing device, comprising a seismic test bench (1), a fixing plate (2) for fixing a detection member being installed on the top of the seismic test bench (1), characterized in that: A base (3) for carrying the seismic test bench (1) is installed at the bottom of the seismic test bench (1); a vertical shock absorbing assembly for vertically absorbing the seismic test bench (1) is installed between the bottom of the seismic test bench (1) and the inner wall of the bottom end of the base (3); a transmission rod (4) is rotatably installed around the seismic test bench (1) through an axle pin; moving blocks (5) are symmetrically installed on both sides of one end of the transmission rod (4) away from the seismic test bench (1); a primary shock absorbing assembly for absorbing the seismic test bench (1) is installed between the moving block (5) and the transmission rod (4); a secondary shock absorbing assembly for absorbing the seismic test bench (1) is installed between the moving block (5) and the inner wall of the bottom end of the base (3); and a damper (22) is installed between the bottom of the seismic test bench (1) and the middle inner part of the base (3).

2. A hierarchical shock absorbing device according to claim 1, characterized in that: The vertical shock absorbing assembly comprises a fixed column (6), a fixed cylinder (7) and a vertical shock absorbing spring (8); the fixed column (6) is symmetrically fixedly installed at the bottom of the earthquake resistance test bench (1); the fixed cylinder (7) is fixedly installed on the inner wall of the bottom end of the base (3) at a position corresponding to the fixed column (6); the fixed column (6) is movably installed inside the fixed cylinder (7); the vertical shock absorbing spring (8) is fixedly installed at the bottom end of the fixed column (6); and one end of the vertical shock absorbing spring (8) away from the fixed column (6) is fixedly connected to the inner wall of the bottom end of the fixed cylinder (7).

3. A hierarchical shock absorbing device according to claim 1, characterized in that: The primary shock absorbing assembly comprises a slide groove (9), a slider (10), a first limiting hole (11), a mounting block (12), a first limiting rod (13) and a first shock absorbing spring (14); a slide groove (9) is provided in the middle of one end of the transmission rod (4) away from the seismic test bench (1); a slider (10) is slidably mounted inside the slide groove (9); the moving block (5) is movably mounted on both sides of the slider (10); first limiting holes (11) are symmetrically provided on both sides of the slider (10); mounting blocks (12) are symmetrically fixedly mounted on both sides of the transmission rod (4); a first limiting rod (13) is fixedly mounted between two mounting blocks (12) on the same side; the first limiting rod (13) is slidably connected to the first limiting hole (11); a first shock absorbing spring (14) is sleeved on the outer side of the top end of the first limiting rod (13); one end of the first shock absorbing spring (14) is fixedly connected to the slider (10); and the other end of the first shock absorbing spring (14) is fixedly connected to the mounting block (12).

4. A hierarchical shock absorbing device according to claim 3, characterized in that: Positioning rods (15) are symmetrically fixedly mounted on both sides of the sliding block (10), and a positioning hole (16) is provided at the top of the moving block (5). The positioning hole (16) is slidably and rotatably connected to the positioning rod (15).

5. A hierarchical shock absorbing device according to claim 4, characterized in that: The secondary shock absorbing assembly comprises a second limiting hole (17), a second limiting rod (18) and a second shock absorbing spring (19); the bottom end of the moving block (5) is provided with a second limiting hole (17); the side wall of the base (3) and the inner wall of the bottom end of the base (3) are fixedly mounted with a second limiting rod (18) at a position corresponding to the moving block (5); the second limiting rod (18) is slidably connected to the second limiting hole (17); a second shock absorbing spring (19) is sleeved on the outer side of one end of the second limiting rod (18) away from the side wall of the base (3); one end of the second shock absorbing spring (19) is fixedly connected to the moving block (5); and the other end of the second shock absorbing spring (19) is fixedly connected to one end of the second limiting rod (18) away from the base (3).

6. A hierarchical shock absorbing device according to claim 1, characterized in that: A pulling spring (20) is fixedly mounted between the upper surface of the transmission rod (4) and the side wall of the base (3).

7. A hierarchical shock absorbing device according to claim 6, characterized in that: An isolation plate (21) is fixedly mounted on the top end of the base (3).

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