CN213364179U

CN213364179U - Clamp for vibration experiment of airplane airborne product

Info

Publication number: CN213364179U
Application number: CN202022305802.7U
Authority: CN
Inventors: 范鑫; 孙涛; 皮志超
Original assignee: Shanghai Hangyi High Tech Development Research Institute Co ltd
Current assignee: Shanghai Hangyi High Tech Development Research Institute Co ltd
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2021-06-04
Anticipated expiration: 2030-10-16

Abstract

The utility model relates to an aircraft carries anchor clamps for product vibration experiments belongs to vibration experiment technical field. Comprises a clamp base and an annular boss; be equipped with the anchor clamps base on the shaking table for the experiment, be equipped with the hollow annular boss of cylinder on the anchor clamps base, the one end that the anchor clamps base was kept away from to annular boss is equipped with the opening that is used for installing the sample that awaits measuring. The utility model can be reliably connected with the vibrating table and the product, has proper quality, not only ensures the normal work of the vibrating table, but also reduces the influence on the product; when different products are subjected to vibration tool tests, the tool clamp does not need to be replaced, so that the test efficiency is improved; the utility model discloses a frock clamp for vibration experiment simple structure, easy to use, experimental convenience, preparation low cost.

Description

Clamp for vibration experiment of airplane airborne product

Technical Field

The utility model relates to an aircraft carries anchor clamps for product vibration experiments belongs to vibration experiment technical field.

Background

The aerospace products are inevitably influenced by the vibration environment in the use and transportation processes, and in order to check the environmental adaptability of the products, relevant vibration tests are required to be carried out before the products leave a factory so as to improve the reliability of the products. And the reasonable design of the clamp which accords with the vibration test condition is the key for ensuring the test quality. The vibration clamp has the advantages that mechanical energy of the vibration table is transmitted to a test piece without distortion, and a set of vibration clamp with reasonable design can ensure convenient and reliable connection between the test piece and the vibration table, has good transmission characteristics and avoids under test and over test of the test piece.

Disclosure of Invention

The utility model aims at solving the technical problem of how to transmit the mechanical energy of the vibration table to a test article without distortion in a vibration test.

In order to solve the problems, the technical scheme adopted by the utility model is to provide a clamp for vibration experiment of an airplane airborne product; comprises a clamp base and an annular boss; be equipped with the anchor clamps base on the shaking table for the experiment, be equipped with the hollow annular boss of cylinder on the anchor clamps base, the one end that the anchor clamps base was kept away from to annular boss is equipped with the opening that is used for installing the sample that awaits measuring.

Preferably, the clamp base is fixedly connected with the experimental vibration table through bolts.

Preferably, the bottom plane of the clamp base is provided with a mounting hole; the mounting holes are arranged in a ring shape around the center of the bottom plane.

Preferably, the clamp base and the annular boss are in an integrated structure.

Preferably, a reinforcing rib plate for supporting the annular boss is arranged between the periphery of the annular boss and the clamp base.

Preferably, the upper end face of the annular boss is provided with a threaded hole for connecting a sample to be tested.

Preferably, the natural frequency of the jig is set to have no resonance peak below 800 Hz; 800-1500Hz allows 4 resonance peaks, and the 3dB bandwidth is set to be more than 100 Hz; 1500-2000Hz allows 3 formants, the 3dB bandwidth is set to be greater than 125Hz, and the amplification factor is set to be less than or equal to 8.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model can be reliably connected with the vibrating table and the product, has proper quality, not only ensures the normal work of the vibrating table, but also reduces the influence on the product;

2. the tool clamp can carry out vibration tool tests on products, and the tool clamp does not need to be replaced when different products are tested, so that the test efficiency can be improved;

3. the tool clamp is simple in structure, easy to use, convenient to test and low in cost.

Drawings

FIG. 1 is a schematic structural view of a vibration test fixture for an airborne product according to the present invention;

fig. 2 is the utility model relates to a machine carries product anchor clamps for vibration test and the general structure schematic diagram of the sample that awaits measuring.

Reference numerals: 1. a clamp base; 2. an annular boss; 3. a base bolt through hole; 4. reinforcing rib plates; 5. a threaded hole of the annular boss; 6. and (5) testing the sample to be tested.

Detailed Description

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings:

as shown in fig. 1-2, the utility model provides a clamp for vibration experiment of airplane-mounted products; comprises a clamp base 1 and an annular boss 2; be equipped with anchor clamps base 1 on the shaking table for the experiment, be equipped with the hollow annular boss 2 of cylinder on the anchor clamps base 1, the one end that the anchor clamps base 1 was kept away from to annular boss 2 is equipped with the opening that is used for installing sample 6 that awaits measuring. The clamp base 1 is fixedly connected with the experimental vibrating table through bolts. A mounting hole is arranged on the bottom plane of the clamp base 1; the mounting holes are arranged in a ring shape around the center of the bottom plane. The clamp base 1 and the annular boss 2 are of an integrated structure. And a reinforcing rib plate 4 for supporting the annular boss is arranged between the periphery of the annular boss 2 and the clamp base 1. The upper end face of the annular boss 2 is provided with a threaded hole 5 for connecting a sample 6 to be measured. The natural frequency of the clamp for the vibration experiment of the aircraft-mounted product is set to be below 800Hz without a resonance peak; 800-1500Hz allows 4 resonance peaks, and the 3dB bandwidth is set to be more than 100 Hz; 1500-2000Hz allows 3 formants, the 3dB bandwidth is set to be greater than 125Hz, and the amplification factor is set to be less than or equal to 8.

The utility model discloses embodiment provides an on-board product anchor clamps for vibration test, as shown in FIG. 1 this anchor clamps be the integrative piece of an anchor clamps base 1 and annular boss 2, can include base plane and annular boss 2, base plane and annular boss 2 constitute an annular open-ended box-shaped structure.

In order to facilitate the connection of the base plane and the vibration table, a base bolt through hole 3 is arranged; the base plane is provided with a central hole (corresponding to the total mass center of the product and the clamp), and the rest base bolt through holes 3 are distributed according to the requirements of the vibration table and the actual structure size of the clamp (in a multi-ring distribution). For the annular boss 2 to be reliably assembled with the product, the inner diameter and depth of the annular boss 2 should be larger than the size of the lower part of the product, and a proper space is left. In order to ensure the reliable connection of the annular boss 2 and a product, eight threaded holes 5 distributed circumferentially are punched on the table top of the annular boss 2, and the positions of the threaded holes correspond to the holes of the product. In order to enhance the rigidity of the annular boss 2, eight reinforcing rib plates 4 which are circumferentially distributed are arranged on the outer side of the annular boss 2, and the positions of the reinforcing rib plates correspond to the threaded holes of the annular boss.

The natural frequency of the clamp for the vibration test has no resonance peak below 2000Hz, the amplification factor is approximately equal to 1, the clamp is ensured not to resonate with a product, and the clamp has good transmission characteristics.

The utility model discloses an on-machine product anchor clamps for vibration test, anchor clamps base plane and annular boss 2 constitute an annular opening box structure to beat the fixed product of screw hole with the centre gripping on annular boss mesa. The base plane is connected with the vibrating table, so that the mechanical state of an airborne product in the vertical direction is simulated, meanwhile, the clamping mode of the annular opening box type structure is adopted, the structure is simple, repeated disassembly and assembly are facilitated, the connection is reliable, and the requirement for meeting the transmission characteristic can be well met according to the subsequent transmission characteristic test result.

The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the present invention in any way and in any way, and it should be understood that modifications and additions may be made by those skilled in the art without departing from the scope of the present invention. Those skilled in the art can make various changes, modifications and evolutions equivalent to those made by the above-disclosed technical content without departing from the spirit and scope of the present invention, and all such changes, modifications and evolutions are equivalent embodiments of the present invention; meanwhile, any changes, modifications and evolutions of equivalent changes to the above embodiments according to the actual technology of the present invention are also within the scope of the technical solution of the present invention.

Claims

1. A clamp for vibration experiments of airplane airborne products; the method is characterized in that: comprises a clamp base and an annular boss; be equipped with the anchor clamps base on the shaking table for the experiment, be equipped with the hollow annular boss of cylinder on the anchor clamps base, the one end that the anchor clamps base was kept away from to annular boss is equipped with the opening that is used for installing the sample that awaits measuring.

2. The clamp for the vibration experiment of the aircraft-mounted product as claimed in claim 1, wherein: the clamp base is fixedly connected with the experimental vibrating table through bolts.

3. The clamp for the vibration experiment of the aircraft-mounted product as claimed in claim 2, wherein: the bottom plane of the clamp base is provided with a mounting hole; the mounting holes are arranged in a ring shape around the center of the bottom plane.

4. The clamp for the vibration experiment of the aircraft-mounted product as claimed in claim 3, wherein: the clamp base and the annular boss are of an integrated structure.

5. The clamp for the vibration experiment of the aircraft-mounted product as claimed in claim 4, wherein: and a reinforcing rib plate for supporting the annular boss is arranged between the periphery of the annular boss and the clamp base.

6. The clamp for the vibration experiment of the aircraft-mounted product as claimed in claim 5, wherein: and the upper end face of the annular boss is provided with a threaded hole for connecting a sample to be tested.

7. The clamp for the vibration experiment of the aircraft-mounted product as claimed in claim 6, wherein: the natural frequency of the clamp is set to be below 800Hz without a resonance peak; 800-1500Hz allows 4 resonance peaks, and the 3dB bandwidth is set to be more than 100 Hz; 1500-2000Hz allows 3 formants, the 3dB bandwidth is set to be greater than 125Hz, and the amplification factor is set to be less than or equal to 8.