CN101158658A - High-low temperature box constant pressure clamp - Google Patents

Abstract

The invention provides a high-low temperature box constant pressure clamp which is simple and compact in structure, practical and effective, is used for being matched with a high-low temperature box machine table to achieve the purpose of constant pressure clamping of a test piece, and has accurate detection data of tested temperature physical characteristics. The invention comprises a box body, wherein a push plate is arranged in a cavity of the box body, an air inlet and an air outlet are respectively arranged on two sides of the push plate of the cavity of the box body, a push rod is connected to the side surface of the push plate, and a clamping piece is connected to the end part of the push rod far away from the push plate. The invention adopts the push plate to be connected with the push rod, the push rod is fixedly connected with the clamping piece fixing block, the clamping piece is arranged on the clamping piece fixing block, the two sides of the push plate of the cavity of the box body are respectively provided with the air inlet and the air outlet, the two clamping pieces hold the test piece under constant force to clamp the test piece, the defect that the plastic and rubber test piece becomes soft or thin under a high-temperature testing machine is avoided, and the testing precision is greatly improved.

Description

High and low temperature box constant pressure fixture

technical field

The invention relates to a high and low temperature chamber testing machine, in particular to a constant pressure fixture structure for clamping a test piece with a constant force inside the high and low temperature chamber testing machine.

Background technique

In order to test the temperature physical properties of the product, the product and components are exposed to different temperature characteristics at different temperatures, so as to determine the applicable field and environment of the product. Especially when it is necessary to detect the temperature and physical properties of the product under the condition of clamping the test specimen with constant force, such as the clamping test specimen is rubber and plastic, the plastic and rubber will become soft or thin at high temperature, the physical properties of the test specimen If it is damaged, the general mechanical fixture cannot achieve the purpose of constant pressure, and the general pneumatic fixture itself contains plastic parts, which will be deformed at high temperature, thus destroying the constant pressure characteristics of the fixture, resulting in inaccurate temperature characteristic data of the test specimen. precise.

Contents of the invention

Aiming at the defects existing in the prior art, the technical problem to be solved by the present invention is to provide a simple and compact structure, practical and effective high and low temperature chamber constant pressure fixture, which is used in conjunction with the high and low temperature chamber machine to achieve test For the purpose of constant pressure clamping of parts, the temperature and physical characteristics of the test are accurate.

In order to achieve the above purpose, the high and low temperature box constant pressure fixture of the present invention adopts the following technical solutions:

A constant pressure fixture for a high and low temperature box, which includes a box body, a push plate is provided in the cavity of the box body, an air inlet hole and an exhaust hole are respectively provided on both sides of the push plate of the box cavity, and the sides of the push plate are connected A push rod, the end of the push rod away from the push plate is connected to the clip.

Further, a clip fixing block is provided between the push rod and the clip, the push rod is connected to the clip fixing block, and the side of the clip fixing block away from the push rod is connected to the clip;

Further, a spring is provided on the side of the push plate close to the push rod;

The middle part of the push plate in the above box cavity is provided with a sealing rubber ring;

The top of the above-mentioned box is provided with a test piece joint.

As can be seen from the above, in order to achieve the above-mentioned purpose, the present invention adopts a push plate to be connected with a push rod, the push rod is fixedly connected to the clip fixing block, the clip is installed on the clip fixing block, and a push plate is provided on both sides of the box cavity. The air inlet hole and one exhaust hole, the two clips hold the test specimen with a constant force, avoiding the defect that the plastic and rubber specimens become soft or thin under the high temperature testing machine, and the clamping force of the specimen is balanced, greatly improved the test accuracy.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the present invention;

Fig. 2 is a perspective view of an embodiment of the present invention.

Detailed ways

In order to further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

The relevant structure described in the present invention mainly includes the following parts (or devices): specimen joint 1, sealing rubber ring 2, air inlet 3, push rod 4, clip fixing block 5, clip 6, exhaust hole 7, Spring 8, push plate 9, casing 10.

Please refer to accompanying drawing 1 and shown in Fig. 2, the constant pressure fixture of high and low temperature box of the present invention, comprises box body 10, is provided with push plate 9 in the cavity of box body 10, and the two sides of push plate 9 of box body 10 cavity are respectively provided with There is an air inlet 3 and an exhaust hole 7 , the side of the push plate 9 is connected to the push rod 4 , and the end of the push rod 4 away from the push plate 9 is connected to the clip 6 .

A clip fixing block 5 is provided between the push rod 4 and the clip 6 , the push rod 4 is connected to the clip fixing block 5 , and the side of the clip fixing block 5 away from the push rod 4 is connected to the clip 6 .

Push plate 9 is provided with spring 8 close to the side of push rod 4, and the middle part of push plate 9 in box body 10 cavity is provided with sealing rubber ring 2, and the top of box body 10 is provided with test piece joint 1.

The test piece joint 1 is used to fix the structure of the box body 10 on the machine platform of the high and low temperature box, so that the box body 10 is firmly and stably connected in the high and low temperature box, the external air pipe is connected to the air inlet 3, and the gas enters the box body 10 In the cavity, the gas is between the push plate 9 and the inner wall of the fixture, pushing the push plate 9 to move to the left, thereby driving the clip fixing block 5 fixed on the push rod 4 to move, and the clip fixing block 5 drives the clip 6 to move forward , so that the two clips 6 are close to each other, so as to achieve the purpose of clamping the specimen under constant pressure.

The clamp releases pressure through the exhaust hole 7, turns off the gas source switch, loosens between the two clips 6, and the push plate 9 returns to its original position under the promotion of the spring 8. The push plate 9 is connected with the push rod 4 , the push rod 4 is fixedly connected with the clip fixing block 5 , and the clip 6 is installed on the clip fixing block 5 .

To sum up, the present invention has been produced as a sample according to the content of the patent specification and drawings, and has been tested for many times, which proves that it can achieve its expected purpose and effect, and its practical value is beyond doubt.

But what is described above is only a preferred embodiment of the present invention, and should not be used to limit the scope of implementation of the present invention, that is, all equivalent changes and modifications made according to the patent scope of the present invention should still belong to the patent of the present invention. within the scope covered.

Claims (5)

1. A high and low temperature box constant pressure fixture, comprising: a box body (10), characterized in that: a push plate (9) is provided in the cavity of the box body (10), and the box body (10) cavity The two sides of the push plate (9) are respectively provided with an air inlet (3) and an exhaust hole (7), the side of the push plate (9) is connected with the push rod (4), and the push rod (4) is far away from the push plate (9) end of the clip (6). 2. The high and low temperature chamber constant pressure fixture according to claim 1, characterized in that: a clip fixing block (5) is provided between the push rod (4) and the clip (6), and the push rod (4) The clip fixing block (5) is connected, and the side of the clip fixing block (5) away from the push rod (4) is connected to the clip (6). 3. The constant pressure fixture for high and low temperature chambers according to claim 1, characterized in that a spring (8) is provided on the side of the push plate (9) close to the push rod (4). 4. The constant pressure fixture for a high and low temperature box according to claim 1, characterized in that: a sealing rubber ring (2) is provided at the middle of the push plate (9) in the cavity of the box body (10). 5. The constant pressure fixture for a high and low temperature box according to claim 1, characterized in that: the top of the box (10) is provided with a test piece joint (1).

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