Metal hose mechanical strength test tool

Abstract

The utility model discloses a metal hose mechanical strength test frock, and the clamp bar 1 with internal thread is connected with the clamp main body through the thread and the mounting nut 2, and the fixed clamp mouth 5 and the movable clamp mouth 4 are connected through the pin shaft, and there is a through hole on the fixed clamp mouth 5 and the movable clamp mouth 4 respectively, and the screw rod 8 is inserted into the spring 3 center, and after passing through the through hole on the fixed clamp mouth 5 and the movable clamp mouth 4, the both sides are connected with the hand screw nut 7 and the eccentric wheel fixed valve 6 respectively. The utility model improves the accuracy of the strength test data of metal hose, and realizes the efficient completion of the large batch test of metal hose through the structure characteristics of facilitating loading and unloading.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical testing equipment technology, and in particular, it is a device for fixing the head of a metal hose in a mechanical strength test of a metal hose. Background Technology

[0002] Metal flexible hoses are primarily used to protect their internal linear structures from wear and bending damage during application in harsh environments. Due to their functional requirements, it is necessary to test the compression strength between a large number of metal flexible hose bodies and hose heads. However, a problem arises during testing: due to the special structure of the hose and hose head, directly clamping the sample with the testing machine's jaws can cause damage, resulting in test data that is lower than the actual load-bearing capacity of the hose, thus affecting the accuracy of the test results.

[0003] To address similar issues, a common approach is to design corresponding clamping fixtures based on the specific requirements of the sample using mechanical structures such as eccentric wheels. For example, patent CN219005586U (A Clamping Fixture with an Eccentric Wheel) proposes a clamping fixture utilizing an eccentric wheel structure, which effectively secures the sample during testing. However, for strength testing of metal hoses, the following drawbacks exist: First, due to the specific requirements of different hose sample shapes and sizes, it is difficult to ensure the integrity of the sample during clamping. Second, it is difficult to meet the requirements of mass production of metal hoses, where the testing fixture must enable rapid clamping and disassembly of the sample. Summary of the Invention

[0004] The purpose of this invention is to provide an improved metal hose clamping device, which can effectively achieve the functions of fixing and quick loading and unloading in metal hose strength tests.

[0005] The technical solution to achieve the purpose of this utility model is as follows: a metal hose mechanical strength testing fixture, wherein a clamping bar with internal threads is fixed to the main body of the fixture by the threads and the mounting nut, wherein the fixed clamping port and the movable clamping port are connected by a pin, and a through hole is provided symmetrically on the fixed clamping port and the movable clamping port respectively, the screw is inserted into the center of the spring, and after passing through the through holes on the fixed clamping port and the movable clamping port, it is connected to the hand-tightening nut and the eccentric wheel fixing valve on both sides respectively.

[0006] Furthermore, the testing fixture is connected to the standard testing machine via clamping bars by direct clamping or by inserting pins.

[0007] Furthermore, after the eccentric wheel fixing valve is opened, the metal hose head can pass through the notch formed by the fixed clamp and the movable clamp by adjusting the tightness of the hand-tightening nut and the screw.

[0008] Compared with the prior art, the present invention has the following significant advantages: (1) The present invention mainly improves the accuracy of the strength test data of metal hoses by means of clamps, and (2) the present invention achieves efficient completion of large-scale tests of metal hoses by means of the structural features that facilitate loading and unloading. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the mechanical strength testing fixture for metal hoses proposed in this utility model. Detailed Implementation

[0010] The following is combined Figure 1 This invention provides a detailed description of the specific device and its operation based on the present invention.

[0011] The equipment includes a clamping bar 1 with internal threads, which is connected to the clamp body via threads and mounting nuts 2. The fixed clamping jaw 5 and the movable clamping jaw 4 are connected by pins. There is a through hole on the fixed clamping jaw 5 and the movable clamping jaw 4 respectively. The screw 8 is inserted into the center of the spring 3 and passes through the through holes on the fixed clamping jaw 5 and the movable clamping jaw 4. It is then connected to the hand-tightening nut 7 and the eccentric wheel fixing valve 6 on both sides respectively.

[0012] During the test, the device is connected to the standard testing machine primarily via clamping rod 1, either by direct clamping or by inserting a pin. After opening the eccentric wheel fixing valve 6, the tightness of the hand-tightened nut 7 and screw 8 is adjusted to allow the metal hose head to pass through the notch formed by the fixed clamp 5 and the movable clamp 4. The eccentric wheel fixing valve 6 is then closed, and the hose strength test can begin. After the test, opening the eccentric wheel fixing valve 6 releases the spring 3, causing the movable clamp 4 to spring open, allowing the sample to be quickly removed from the notch below. The mounting nut 2 is used to ensure the device can be disassembled, maintained, and repaired.

[0013] In summary, the purpose of this invention is achieved as follows: The hose head is fixed by combining a screw, a spring, and an eccentric wheel. The hose clamps at both ends are adjusted by hand-tightening the nut in conjunction with the screw, ensuring that the central hole can precisely pass through the hose head of the corresponding size. The spring and eccentric wheel are then used to fix the hose, thus ensuring that the hose will neither slip off nor be damaged by the clamping structure during the test. After the test, the sample can be disassembled by opening the fixing valve.

Claims

1. A tooling for testing the mechanical strength of a metal hose, characterized in that: A clamping bar (1) with internal threads is fixed to the main body of the clamp by the thread and the mounting nut (2). The fixed clamping port (5) and the movable clamping port (4) are connected by a pin. A through hole is provided symmetrically on the fixed clamping port (5) and the movable clamping port (4). The screw (8) is inserted into the center of the spring (3) and passes through the through hole on the fixed clamping port (5) and the movable clamping port (4). It is then connected to the hand-tightening nut (7) and the eccentric wheel fixing valve (6) on both sides.

2. The mechanical strength testing fixture for metal hoses according to claim 1, characterized in that: The test fixture is connected to the standard test machine by means of clamping or inserting pins via clamping bars (1).

3. The mechanical strength testing fixture for metal hoses according to claim 1, characterized in that: After the eccentric wheel fixing valve (6) is opened, the metal hose head can pass through the notch formed by the fixed clamp (5) and the movable clamp (4) by adjusting the tightness of the hand-tightening nut (7) and the screw (8).

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