Clamp for vibration test

Abstract

The utility model relates to the field of vibration tests, and discloses a vibration test clamp, which is characterized in that two groups of mounting racks are arranged on the left side and the right side of the upper end surface of a base in a sliding manner, and a plurality of lower support frames which are distributed at equal intervals are arranged below the inward side surface of each group of mounting racks; a plurality of upper supporting frames distributed at equal intervals are installed above the surface of the inward side of each installation frame, a plurality of upper fixing strips distributed at equal intervals are installed between the upper supporting frames of the two installation frames, and a plurality of lower fixing strips distributed at equal intervals are installed between the lower supporting frames of the two installation frames. The middle of the upper fixing strip is bent upwards to form an upper arc-shaped part, the middle of the lower fixing strip is bent downwards to form a lower arc-shaped part, the upper fixing strip and the lower fixing strip are arranged between the two mounting frames, and the surfaces of the upper fixing strip and the lower fixing strip can be attached to the outer part of a test piece and fix the test piece, so that the upper fixing strip and the lower fixing strip are in surface-to-surface contact; the contact area is increased, and the vibration transmission effect is improved.

Description

Technical Field

[0001] The utility model relates to the field of vibration testing, in particular to a clamp for vibration testing. Background Art

[0002] After the production of some products such as pipes or tanks, they will be subjected to a certain degree of vibration, impact, collision and other stress during use and transportation, so they need to be subjected to corresponding tests to test their performance. At present, when testing them, the test fixture generally uses four baffles fixed on the top of the vibration table. The four baffles form a rectangular structure, and the test piece is placed in the rectangular structure. This method can only tighten the test piece, but it cannot rigidly transfer the force to the test piece during the test. At the same time, because the fixture and the test piece are in line contact, the tightening force on the surface of the fire tank cannot be uniform. To this end, we designed a fixture for vibration testing. Utility Model Content

[0003] In order to solve the technical problems that force cannot be rigidly transmitted to the test piece during the test and the fastening force on the surface of the fire tank cannot be uniform because the fixture and the test piece are in line contact, the utility model provides a vibration test fixture.

[0004] The utility model is implemented by the following technical scheme: a clamp for vibration testing, comprising a base, two groups of mounting frames are slidingly arranged on the left and right sides of the upper end surface of the base, a plurality of lower support frames distributed at equal intervals are installed below the inward side surface of each group of mounting frames, and a plurality of upper support frames distributed at equal intervals are installed above the inward side surface of each group of mounting frames, a plurality of upper fixing bars distributed at equal intervals are installed between the upper support frames of the two groups of mounting frames, and a plurality of lower fixing bars distributed at equal intervals are installed between the lower support frames of the two groups of mounting frames, the middle part of the upper fixing bar is bent upward to form an upper arc portion, and the middle part of the lower fixing bar is bent downward to form a lower arc portion.

[0005] As a further improvement of the above solution, the lower fixing bar and the upper fixing bar are both a kind of metal soft strips, and the upper fixing bar and the lower fixing bar can be deformed and then fit on the surface of the specimen, and the surfaces of both ends of the lower fixing bar and the upper fixing bar are polished to form arc chamfers, which will not cause scratches on the surface of the specimen when in contact with the specimen.

[0006] As a further improvement of the above solution, the upper support frame and the lower support frame are both arranged in an L-shaped structure, and connecting holes are formed through the upper and lower sides of the upper support frame and the lower support frame;

[0007] The left and right ends of the lower fixing bar are both provided with lower fixing holes, and the left and right ends of the upper fixing bar are both provided with upper fixing holes. The upper fixing bar is fixed between the two corresponding upper support frames on the left and right by bolts and nuts, and the lower fixing bar is fixed between the two corresponding lower support frames on the left and right by bolts and nuts, which is convenient for installation and disassembly of the upper and lower fixing bars, and can support the left and right ends of the upper and lower fixing bars. The test piece is placed between the upper and lower fixing bars so that they are in surface contact, which increases the contact area and improves the vibration transmission effect.

[0008] As a further improvement of the above scheme, multiple groups of adjustment sliding holes are provided on the left and right side surfaces of the mounting frame, and the multiple groups of adjustment sliding holes are distributed at equal intervals. The outward surfaces of the upper support frame and the lower support frame are both slidably arranged with the inward surface of the mounting frame, and the upper support frame, the lower support frame and the mounting frame are connected by bolts and nuts. After the lower fixing bar is fixed between the left and right groups of mounting frames, the specimen is placed above the multiple lower fixing bars, and then the upper fixing bar moves downward to fit the upper surface of the specimen. The upper support frames on the left and right sides move downward, causing the upper fixing bar to bend, thereby increasing the contact area between the two.

[0009] As a further improvement of the above solution, the mounting frame is arranged in an L-shaped structure, and a triangular reinforcement block is welded to the front and rear ends of the mounting frame respectively, which improves the overall connection strength of the mounting frame and makes it less likely to deform.

[0010] As a further improvement of the above scheme, a plurality of equally spaced mounting grooves are formed on the left and right sides of the base, and the mounting grooves are in a convex structure. The mounting frame is fixed to the left and right sides above the base by fixing bolts and fixing nuts. A circular hole is provided at the bottom of the mounting frame, and the fixing bolt is slidably placed in the mounting groove, and the mounting frame is sleeved on top of the fixing bolt through the circular hole. After that, the fixing nut is loosened, and the mounting frame can change its position above the base as needed, thereby being suitable for test pieces with a variety of different outer diameters.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. The utility model provides an upper fixing bar and a lower fixing bar between the two mounting frames, wherein the surfaces of the upper fixing bar and the lower fixing bar can be attached to the outside of the test piece and fix it, so that they are in surface contact, the contact area is increased, and the vibration transmission effect is improved;

[0013] 2. Two mounting brackets are set up by sliding left and right above the base, and the upper fixing bar and the lower fixing bar are slidably placed between the two mounting brackets. The distance between them can be adjusted accordingly as needed, thereby being suitable for the installation and fixation of specimens of various sizes, thereby improving diversity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a vibration test fixture provided by the utility model;

[0015] Figure 2 for Figure 1 Schematic diagram of the structure in which the test piece is fixed;

[0016] Figure 3 for Figure 1 A structural diagram in which the upper fixing bar is not provided;

[0017] Figure 4 for Figure 1 Schematic diagram of the structure with one side of the mounting bracket not installed.

[0018] Description of main symbols:

[0019] 1. Base; 11. Mounting slot; 2. Mounting bracket; 21. Adjusting slide hole; 22. Reinforcement block; 23. Fixing bolt; 24. Fixing nut; 3. Upper fixing bar; 31. Upper fixing hole; 4. Upper support bracket; 41. Connecting hole; 5. Lower fixing bar; 51. Lower fixing hole; 6. Lower support bracket. DETAILED DESCRIPTION

[0020] Below, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0021] Example:

[0022] Please combine Figures 1-4 A vibration test fixture of this embodiment includes a base 1, two groups of mounting frames 2 are slidably arranged on the left and right sides of the upper end surface of the base 1, a plurality of lower support frames 6 distributed at equal intervals are installed below the inward surface of each group of mounting frames 2, and a plurality of upper support frames 4 distributed at equal intervals are installed above the inward surface of each group of mounting frames 2, a plurality of upper fixing bars 3 distributed at equal intervals are installed between the upper support frames 4 of the two groups of mounting frames 2, and a plurality of lower fixing bars 5 distributed at equal intervals are installed between the lower support frames 6 of the two groups of mounting frames 2, the middle part of the upper fixing bar 3 is bent upward to form an upper arc portion, and the middle part of the lower fixing bar 5 is bent downward to form a lower arc portion.

[0023] The lower fixing bar 5 and the upper fixing bar 3 are both metal soft strips. The upper fixing bar 3 and the lower fixing bar 5 can be deformed and then fit onto the surface of the specimen. The surfaces of both ends of the lower fixing bar 5 and the upper fixing bar 3 are polished to form arc chamfers, which will not scratch the surface of the specimen when in contact with the specimen.

[0024] The upper support frame 4 and the lower support frame 6 are both L-shaped, and connecting holes 41 are formed through the upper and lower sides of the upper support frame 4 and the lower support frame 6;

[0025] The left and right ends of the lower fixing bar 5 are both provided with lower fixing holes 51, and the left and right ends of the upper fixing bar 3 are both provided with upper fixing holes 31. The upper fixing bar 3 is fixed between the two corresponding upper support frames 4 on the left and right by bolts and nuts, and the lower fixing bar 5 is fixed between the two corresponding lower support frames 6 on the left and right by bolts and nuts, which facilitates the installation and disassembly of the upper fixing bar 3 and the lower fixing bar 5, and can support the left and right ends of the upper fixing bar 3 and the lower fixing bar 5. The test piece is placed between the upper fixing bar 3 and the lower fixing bar 5 so that they are in surface contact, which increases the contact area and improves the vibration transmission effect.

[0026] A plurality of adjustment sliding holes 21 are provided on the left and right side surfaces of the mounting frame 2, and the plurality of adjustment sliding holes 21 are distributed at equal intervals. The outward surfaces of the upper support frame 4 and the lower support frame are slid up and down with the inward surface of the mounting frame 2, and the upper support frame 4, the lower support frame 6 and the mounting frame 2 are connected by bolts and nuts. After the lower fixing bar 5 is fixed between the left and right groups of mounting frames 2, the test piece is placed above the multiple lower fixing bars 5, and then the upper fixing bar 3 moves downward to fit the upper surface of the test piece. The upper support frames 4 on the left and right sides move downward, causing the upper fixing bar 3 to bend, thereby increasing the contact area between the two.

[0027] The mounting frame 2 is arranged in an L-shaped structure, and a triangular reinforcement block 22 is welded to the front end and the rear end of the mounting frame 2 respectively, which improves the overall connection strength of the mounting frame 2 and makes it less likely to deform.

[0028] A plurality of equally spaced mounting grooves 11 are formed on the left and right sides of the base 1, and the mounting grooves 11 are in a convex shape. The mounting frame 2 is fixed to the left and right sides above the base 1 by fixing bolts 23 and fixing nuts 24. A circular hole is provided at the bottom of the mounting frame 2, and the fixing bolts 23 are slidably placed in the mounting grooves 11, and the mounting frame 2 is sleeved on the fixing bolts 23 through the circular hole. After that, the fixing nuts 24 are loosened, and the mounting frame 2 can change its position above the base 1 as needed, thereby being suitable for test pieces with a variety of different outer diameters.

[0029] The implementation principle of a vibration test fixture in the embodiment of the present application is as follows: when installing and fixing the test piece, first fix the mounting frame 2 on one side above the base 1 by means of fixing bolts 23 and fixing nuts 24, and slide the other mounting frame 2 left and right on the base 1. A plurality of lower support frames 6 are installed below the two mounting frames 2, and a lower fixing bar 5 is installed on the lower support frame 6 between the two mounting frames 2. At this time, the test piece can be placed under the plurality of lower fixing bars 5, and the mounting frame 2 is moved left and right to change the curvature of the lower fixing bar 5 so that the inner surface of the lower fixing bar 5 contacts the outer ring surface of the test piece as much as possible, and then the mounting frame 2 can be fixed.

[0030] Then fix the upper fixing bar 3 to the upper support frame 4 on the left and right sides, and move the upper support frame 4 downward to bend the upper fixing bar 3, thereby increasing the contact area between the two, and then fix it;

[0031] By arranging an upper fixing bar 3 and a lower fixing bar 5 between the two mounting frames 2, wherein the surfaces of the upper fixing bar 3 and the lower fixing bar 5 can be attached to the outside of the test piece and fix it, so that they are in surface contact with each other, the contact area is increased, and the vibration transmission effect is improved;

[0032] By sliding two mounting frames 2 left and right above the base 1, and the upper fixing bar 3 and the lower fixing bar 5 are slidably placed between the two mounting frames 2, the distance between them can be adjusted accordingly as needed, thereby being suitable for the installation and fixation of specimens of various sizes, thereby improving diversity.

[0033] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A vibration test fixture, comprising a base (1), characterized in that: Two groups of mounting frames (2) are slidably arranged on the left and right sides of the upper end surface of the base (1); a plurality of lower support frames (6) distributed at equal intervals are installed below the inner side surface of each group of mounting frames (2); and a plurality of upper support frames (4) distributed at equal intervals are installed above the inner side surface of each group of mounting frames (2); a plurality of upper fixing bars (3) distributed at equal intervals are installed between the upper support frames (4) of the two groups of mounting frames (2); a plurality of lower fixing bars (5) distributed at equal intervals are installed between the lower support frames (6) of the two groups of mounting frames (2); the middle of the upper fixing bars (3) is bent upward to form an upper arc portion, and the middle of the lower fixing bars (5) is bent downward to form a lower arc portion.

2. A vibration test fixture as claimed in claim 1, characterized in that: The lower fixing strip (5) and the upper fixing strip (3) are both metal soft strips, and the surfaces of both ends of the lower fixing strip (5) and the upper fixing strip (3) are polished to form arc chamfers.

3. A vibration test fixture as claimed in claim 1, characterized in that: The upper support frame (4) and the lower support frame (6) are both arranged in an L-shaped structure, and connecting holes (41) are formed through the upper and lower sides of the upper support frame (4) and the lower support frame (6); The left and right ends of the lower fixing bar (5) are both provided with lower fixing holes (51), the left and right ends of the upper fixing bar (3) are both provided with upper fixing holes (31), the upper fixing bar (3) is fixed between the two corresponding upper support frames (4) on the left and right by bolts and nuts, and the lower fixing bar (5) is fixed between the two corresponding lower support frames (6) on the left and right by bolts and nuts.

4. A vibration test fixture as claimed in claim 1, characterized in that: The left and right surfaces of the mounting frame (2) are penetrated by a plurality of groups of adjustment sliding holes (21), and the plurality of groups of adjustment sliding holes (21) are distributed at equal intervals. The outward-facing surfaces of the upper support frame (4) and the lower support frame are slidably arranged up and down with the inward-facing surface of the mounting frame (2), and the upper support frame (4), the lower support frame (6) and the mounting frame (2) are connected by bolts and nuts.

5. A vibration test fixture as claimed in claim 1, characterized in that: The mounting frame (2) is arranged in an L-shaped structure, and a reinforcing block (22) with a triangular structure is welded to the front end and the rear end of the mounting frame (2).

6. A vibration test fixture as claimed in claim 1, characterized in that: A plurality of equally spaced mounting slots (11) are formed through the left and right sides of the base (1), and the mounting slots (11) are in a convex shape. The mounting frame (2) is fixed to the left and right sides above the base (1) by fixing bolts (23) and fixing nuts (24).

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