Vibration test clamp

Abstract

The utility model discloses a vibration test clamp which comprises a clamp body, the clamp body comprises supporting blocks, supporting plates and reinforcing ribs, cushion blocks are arranged between the supporting plates, clamping plates are arranged on the supporting plates, fixing sleeves are arranged on the clamping plates, fixing ropes and fasteners are arranged on the supporting blocks, fixing sleeves are arranged on the fasteners, and a protective cover is arranged at the top of the supporting blocks. A damping bolt is arranged between the protective cover and the supporting block, a detected sample is conveniently supported through the supporting block, the supporting plate and the reinforcing ribs, a to-be-detected sample is conveniently clamped through cooperation of a cushion block and a clamping plate, and the to-be-detected sample is conveniently clamped through connection and fixation between a fastener and a fixing rope and cooperation of a fixing sleeve and a fixing sleeve. The clamping plate tightly abuts against the supporting plate, so that the stability of connection between the clamping plate and the supporting plate is improved, the stability of a to-be-tested sample and the accuracy of a vibration test are improved, and by arranging the protective cover, the detected sample is prevented from being interfered by electromagnetic interference, and the to-be-tested sample is prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of product testing, and more specifically, to a vibration test fixture. Background Art

[0002] Vibration test is a test method used to evaluate the performance and reliability of products, structures or systems in a vibration environment. This test is usually used to evaluate the durability and stability of products in transportation, use or other vibration environments. When conducting vibration tests, electromagnetic vibration tables are often used for driving.

[0003] The driving coil of the existing electromagnetic vibration table is driven by a high voltage current in a constant magnetic field to drive the sample to be tested to vibrate, and the electronic products with inductive circuits are very sensitive to the electromagnetic interference generated by the electromagnetic vibration table. When conducting a vibration test, the electronic products with inductive circuits are often easily damaged by the electromagnetic interference generated by the operation of the electric vibration table, thereby affecting the accuracy of the vibration test of the sample to be tested. Some electronic products are cylindrical or elliptical in shape, and the clamping claws of the existing clamping device are horizontal, which is not convenient for clamping cylindrical samples. The sample is easily offset on the fixture, thereby affecting the accuracy of the vibration test detection. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the problems existing in the prior art, the utility model provides a vibration test fixture to solve the technical problems mentioned in the background technology that the sample clamping stability of the cylindrical sample is poor and the electronic products are easily damaged by interference.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vibration test fixture, including a fixture body, the fixture body including a support block and a support plate, a reinforcing rib is provided between the support block and the support plate, a cushion block is provided between the support plates, a clamping plate is provided on the support plate, a fixing sleeve is provided on the clamping plate, a fixing rope is provided on the support block, the fixing rope passes through the clamping plate, a fastener is provided on the fixing rope, a fixing sleeve is provided on the fastener, the fixing sleeve is threadedly connected to the fixing sleeve, a protective cover is provided on the top of the support block, and a shock-absorbing bolt is provided between the protective cover and the support block.

[0008] The utility model is further configured that the fastener comprises a fastening block, a fastening pad is arranged in the fastening block, the fastening pad is conical and is provided with a fastening groove, and the position of the fixing rope is fixed by the cooperation of the fixing block and the fixing pad.

[0009] The utility model is further configured that a fastening sleeve is threadedly connected to the outer side of the fastening block, a fastening tube is provided inside the fastening sleeve, and the fastening tube is in conflict with the fastening pad, so that the fastening pad is fastened and connected to the fixing rope.

[0010] The utility model is further configured that the shock-absorbing bolt comprises a head, a connecting portion and a threaded portion, and is connected to the support block through the threaded portion to fix the position of the protective cover.

[0011] The utility model is further configured such that a shock absorbing ring is sleeved on the outer side of the connection part, a shock absorbing block is provided on the shock absorbing ring, and a groove cooperating with the shock absorbing ring is provided under the head, so as to improve the connection stability between the protective cover and the support block and reduce the influence of the high-frequency vibration of the protective cover on the vibration test of the sample to be tested to a certain extent.

[0012] The utility model is further configured that the support block is provided with a support groove, and the support groove is provided with a support pad to improve the connection stability between the shock-absorbing bolt and the support block.

[0013] The utility model is further configured that a vibration absorbing layer is provided between the protective cover and the support block, so as to reduce the influence of the high-frequency vibration of the protective cover on the vibration test of the sample to be tested.

[0014] The utility model is further configured that bending-resistant laminated plates and shear-resistant laminated plates are provided on both sides of the support plate, support block and reinforcing ribs, so as to reduce the weight of the clamp body, increase its natural frequency and effectively improve the transfer characteristics of the clamp body.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a vibration test fixture, which has the following beneficial effects:

[0017] 1. The support blocks, support plates and reinforcing ribs are used to support the test samples. The bending-resistant laminated plates and shear-resistant laminated plates are provided to reduce the weight of the fixture body, increase its natural frequency, and effectively improve the transfer characteristics of the fixture body.

[0018] 2. The cooperation between the pad and the clamping plate makes it easy to clamp the sample to be tested. The clamping plate is tightly pressed against the support plate by connecting and fixing the fastener and the fixing rope, and cooperating with the fixing sleeve and the fixing sleeve, thereby improving the stability of the connection between the clamping plate and the support plate, and improving the stability of the sample to be tested and the accuracy of the vibration test.

[0019] 3. The protective cover can be easily installed on the support block through the shock-absorbing bolts. The protective cover can be set to prevent the test sample from being affected by electromagnetic interference and damage to the sample to be tested. The vibration absorbing layer, support pad, shock-absorbing ring and shock-absorbing pad can be set to reduce the influence of the high-frequency vibration of the protective cover on the vibration test of the sample to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a vibration test fixture in the utility model;

[0021] Figure 2 It is a schematic diagram of the matching structure of the support plate, support block, reinforcing rib, cushion block and clamping plate in the utility model;

[0022] Figure 3 It is a schematic diagram of the matching structure of the fastener, the fixing rope, the fixing sleeve and the fixing sleeve in the utility model;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the shock-absorbing bolt in the utility model;

[0024] Figure 5 It is a schematic diagram of the matching structure of the support block, the bending-resistant laminated plate and the shear-resistant laminated plate in the utility model.

[0025] In the figure: 1. clamp body; 2. support block; 3. support plate; 4. reinforcing rib; 5. cushion block; 6. clamping plate; 7. fixing sleeve; 8. fixing rope; 9. fastener; 10. fixing sleeve; 11. protective cover; 12. shock-absorbing bolt; 13. fastening block; 14. fastening pad; 15. fastening sleeve; 16. fastening tube; 17. head; 18. connecting part; 19. threaded part; 20. shock-absorbing ring; 21. shock-absorbing block; 22. groove; 23. support groove; 24. support pad; 25. vibration absorbing layer; 26. bending-resistant laminated plate; 27. shear-resistant laminated plate. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0028] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually used in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually used in reference to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0029] See also Figure 1-5A vibration test fixture comprises a fixture body 1, the fixture body 1 comprises a support block 2 and a support plate 3, a reinforcing rib 4 is arranged between the support block 2 and the support plate 3, a cushion block 5 is arranged between the support plates 3, a clamping plate 6 is arranged on the support plate 3, a fixing sleeve 7 is arranged on the clamping plate 6, a fixing rope 8 is arranged on the support block 2, the fixing rope 8 passes through the clamping plate 6, a fastener 9 is arranged on the fixing rope 8, a fixing sleeve 10 is arranged on the fastener 9, and the fixing sleeve 10 is threadedly connected with the fixing sleeve 7, the support block A protective cover 11 is provided on the top, a shock-absorbing bolt 12 is provided between the protective cover 11 and the support block 2, a fastener 9 comprises a fastening block 13, a fastening pad 14 is provided inside the fastening block 13, the fastening pad 14 is conical and provided with a fastening groove, a fastening sleeve 15 is threadedly connected to the outside of the fastening block 13, a fastening tube 16 is provided inside the fastening sleeve 15, and the fastening tube 16 is in conflict with the fastening pad 14, and bending-resistant laminated plates 26 and shear-resistant laminated plates 27 are provided on both sides of the support plate 3, the support block 2 and the reinforcing rib 4.

[0030] In this embodiment, when clamping and fixing the test sample, the test sample is placed on the cushion block 5, and the clamping plate 6 is sleeved on the test sample. The fixing rope 8 passes through the clamping plate 6, and the fastening sleeve 15 is rotated. The fastening sleeve 15 moves on the fastening block 13, driving the fastening tube 16 to press the fastening pad 14 inward, and the fastening member 9 is firmly connected to the fixing rope 8 through the fastening pad 14. The fastening member 9 and the fixing sleeve 10 are rotated, and the fixing sleeve 7 moves outward in the fixing sleeve 7, so that the fixing rope 8 is in an upward tensioned state. state, thereby firmly connecting the clamping plate 6 with the supporting plate 3, and hanging the fixture body 1 together on the vibration testing machine, the test can be carried out, the supporting plate 3 and the supporting block 2 are rectangular, and are made of steel plate, aluminum plate, metal alloy or carbon fiber, the reinforcing rib 4 is a glass fiber reinforced plastic structure, the bending-resistant laminated plate 26 is made of rectangular honeycomb aluminum plate or non-metallic honeycomb plate or glass fiber reinforced plastic plate, the shear-resistant laminated plate 27 is made of steel plate, aluminum plate, metal alloy plate or carbon fiber plate, and the supporting block 2, the supporting layer, the bending-resistant laminated plate 26 and the shear-resistant laminated plate 27 are all glued together.

[0031] See also Figure 5 As an implementation method of the shock-absorbing bolt: the shock-absorbing bolt 12 includes a head 17, a connecting portion 18 and a threaded portion 19, a shock-absorbing ring 20 is sleeved on the outer side of the connecting portion 18, a shock-absorbing block 21 is provided on the shock-absorbing ring 20, a groove 22 matching the shock-absorbing ring 20 is provided under the head 17, a supporting groove 23 is provided on the support block 2, a supporting pad 24 is provided on the support groove 23, and a vibration absorbing layer 25 is provided between the protective cover 11 and the support block 2.

[0032] More specifically, the protective cover 11 is a square sealed cover body made of silicon steel sheet, which is a silicon-iron soft magnetic alloy with extremely low carbon content, generally containing 0.5-4.5% silicon. Adding silicon can increase the resistivity and maximum magnetic permeability of iron, reduce coercive force, core loss (iron loss) and magnetic aging, so as to achieve the purpose of preventing electromagnetic interference. When installing the protective cover 11, the support pad 24 is placed in the support groove 23 of the support block 2, the shock-absorbing ring 20 is passed through the mounting hole of the protective cover 11, and the shock-absorbing block 21 is sleeved on the outside of the shock-absorbing ring 20. The shock-absorbing bolt 12 is passed through the shock-absorbing ring 20 and the support pad 24 in turn, and finally connected with the support block 2 by thread, so as to facilitate the fixing of the protective cover 11. The vibration-absorbing layer 25 is made of sheet sponge, which cooperates with the vibration-absorbing layer 25, the support pad 24 and the shock-absorbing ring 20 to reduce the influence of the high-frequency vibration of the protective cover 11 on the vibration test of the sample to be tested.

[0033] In summary, when the overall device is in use or running: when the test sample is clamped and fixed, the test sample is placed on the cushion block 5, and the clamping plate 6 is sleeved on the test sample, the fixing rope 8 is passed through the clamping plate 6, and the fastening sleeve 15 is rotated, and the fastening sleeve 15 moves on the fastening block 13, driving the fastening tube 16 to press the fastening pad 14 inward, and the fastening member 9 is firmly connected to the fixing rope 8 through the fastening pad 14, and the fastening member 9 and the fixing sleeve 10 are rotated, and the fixing sleeve 7 moves outward in the fixing sleeve 7, so that the fixing rope 8 is in a state of being ... The upper tensioning state is achieved, thereby firmly connecting the clamping plate 6 to the supporting plate 3, and the fixture body 1 is hung together on the vibration testing machine to carry out the test. The supporting plate 3 and the supporting block 2 are rectangular and made of steel plate, aluminum plate, metal alloy or carbon fiber. The reinforcing rib 4 is a fiberglass structure. The bending-resistant laminated plate 26 is made of rectangular honeycomb aluminum plate or non-metallic honeycomb plate or fiberglass plate. The shear-resistant laminated plate 27 is made of steel plate, aluminum plate, metal alloy plate or carbon fiber plate. The supporting block 2, the supporting layer, the bending-resistant laminated plate 26 and the shear-resistant laminated plate 27 are all glued together.

[0034] The protective cover 11 is a square sealed cover body made of silicon steel sheet, which is a silicon-iron soft magnetic alloy with extremely low carbon content, generally containing 0.5-4.5% silicon. Adding silicon can increase the resistivity and maximum magnetic permeability of iron, reduce coercive force, core loss (iron loss) and magnetic aging, so as to achieve the purpose of preventing electromagnetic interference. When installing the protective cover 11, the support pad 24 is placed in the support groove 23 of the support block 2, the shock-absorbing ring 20 is passed through the mounting hole of the protective cover 11, and the shock-absorbing block 21 is sleeved on the outside of the shock-absorbing ring 20. The shock-absorbing bolt 12 is passed through the shock-absorbing ring 20 and the support pad 24 in turn, and finally connected with the support block 2 by thread, so as to facilitate the fixing of the protective cover 11. The vibration-absorbing layer 25 is made of sheet sponge, which cooperates with the vibration-absorbing layer 25, the support pad 24 and the shock-absorbing ring 20 to reduce the influence of the high-frequency vibration of the protective cover 11 on the vibration test of the sample to be tested.

[0035] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A vibration test fixture, comprising a fixture body (1), characterized in that: The clamp body (1) comprises a support block (2) and a support plate (3), a reinforcing rib (4) is provided between the support block (2) and the support plate (3), a cushion block (5) is provided between the support plates (3), a clamping plate (6) is provided on the support plate (3), a fixing sleeve (7) is provided on the clamping plate (6), a fixing rope (8) is provided on the support block (2), the fixing rope (8) passes through the clamping plate (6), a fastener (9) is provided on the fixing rope (8), a fixing sleeve (10) is provided on the fastener (9), the fixing sleeve (10) is threadedly connected to the fixing sleeve (7), a protective cover (11) is provided on the top of the support block (2), and a shock-absorbing bolt (12) is provided between the protective cover (11) and the support block (2).

2. A vibration test fixture according to claim 1, characterized in that: The fastener (9) comprises a fastening block (13), a fastening pad (14) is arranged inside the fastening block (13), and the fastening pad (14) is conical and provided with a fastening groove.

3. A vibration test fixture according to claim 2, characterized in that: A fastening sleeve (15) is threadedly connected to the outside of the fastening block (13), a fastening tube (16) is provided inside the fastening sleeve (15), and the fastening tube (16) is in conflict with the fastening pad (14).

4. A vibration test fixture according to claim 1, characterized in that: The shock-absorbing bolt (12) comprises a head (17), a connecting portion (18) and a threaded portion (19).

5. A vibration test fixture according to claim 4, characterized in that: A shock absorbing ring (20) is sleeved on the outside of the connecting portion (18), a shock absorbing block (21) is provided on the shock absorbing ring (20), and a groove (22) matching with the shock absorbing ring (20) is provided below the head portion (17).

6. A vibration test fixture according to claim 5, characterized in that: The support block (2) is provided with a support groove (23), and the support groove (23) is provided with a support pad (24).

7. A vibration test fixture according to claim 1, characterized in that: A vibration absorbing layer (25) is provided between the protective cover (11) and the supporting block (2).

8. The vibration test fixture according to claim 1, characterized in that: The support plate (3), the support block (2) and the reinforcing rib (4) are provided with bending-resistant laminated plates (26) and shear-resistant laminated plates (27) on both sides.

Images