A tensile test fixture

By designing a tensile test fixture with an adjustable clamping assembly and a tie rod angle, the problem of traditional testing methods being unable to clamp at multiple angles was solved, achieving stable clamping of bent specimens and high-precision tensile testing.

CN224518333UActive Publication Date: 2026-07-17GUANGDONG LIANSU TECH INDAL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
GUANGDONG LIANSU TECH INDAL
Filing Date
2025-06-25
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Traditional testing methods cannot meet the requirements of multi-angle testing, which leads to the failure of plastic pipes due to stress concentration during long-term service.

Method used

A tensile testing fixture was designed. By adjusting the angle between the fixture assembly and the tie rod through a rotating component, the bent specimen can be firmly clamped. The transmission mechanism and locking element limit the change of clamping angle, reduce stress concentration, and improve the accuracy of test results.

Benefits of technology

This technology enables stable clamping of specimens with different bending angles, reduces stress concentration, and improves the accuracy and precision of tensile tests.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to test equipment technical field more specifically, relate to a kind of tensile test fixture, including fixture assembly, rotating assembly and the pull rod for connecting tensile testing machine, the rotating assembly is connected between the fixture assembly and the pull rod, when carrying out tensile test, the pull rod of two tensile test fixtures is fixedly installed on tensile testing machine, according to the angle of sample bending, the included angle between fixture assembly and pull rod is adjusted by rotating assembly, the fixture assembly of two tensile test fixtures is respectively clamped the both ends of sample, tensile sample machine is started, tensile sample machine pulls pull rod, and sample is stretched;The included angle between fixture assembly and pull rod is adjusted by rotating assembly, so that fixture assembly can firmly clamp the sample of bending, and the sample with different bending angles is stretched for tensile test.
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Claims

1. A tensile test fixture characterized by, The device includes a clamp assembly (1), a rotating assembly (2), and a pull rod (3) for connecting a tensile testing machine. The rotating assembly (2) is connected between the clamp assembly (1) and the pull rod (3). The rotating assembly (2) includes a rotating shaft (21), a first locking member (22), and a transmission mechanism (24). Both the clamp assembly (1) and the pull rod (3) are rotatably connected to the rotating shaft (21). The first locking member (22) passes through the pull rod (3) and is detachably fixed to the pull rod (3). The first locking member (22) presses against the rotating shaft (21). The transmission mechanism (24) is connected between the rotating shaft (21) and the clamp assembly (1).

2. The tensile test fixture of claim 1, wherein, The first locking member (22) is provided with a third thread, and the pull rod (3) is provided with a first threaded hole that mates with the third thread. The first locking member (22) passes through the first threaded hole and is threadedly connected to the pull rod (3).

3. The tensile test fixture of claim 1, wherein, The transmission mechanism (24) includes a first gear (241) and a second gear (242). The axis of the first gear (241) is fixedly connected to the rotating shaft (21), and the axis of the first gear (241) coincides with the axis of the rotating shaft (21). The axis of the second gear (242) is fixedly connected to the clamp assembly (1), and the first gear (241) and the second gear (242) mesh.

4. The tensile test grip of claim 3, wherein, Both the first gear (241) and the second gear (242) have scale lines on their hubs for marking angles.

5. The tensile test grip of claim 3, wherein, The clamp assembly (1) includes a longitudinal shaft (11), a transverse shaft (12), two parallel clamping plates (13), and a clamping assembly for clamping the clamping plates (13). The transverse shaft (12) is perpendicular to the longitudinal shaft (11) and is fixedly connected to the longitudinal shaft (11). The two clamping plates (13) are perpendicular to the transverse shaft (12) and are slidably connected to the transverse shaft (12). The longitudinal shaft (11) is located between the two clamping plates (13) and is rotatably connected to the rotating shaft (21). The axis of the second gear (242) is fixedly connected to the side of the longitudinal shaft (11). The clamping assembly is mounted on the longitudinal shaft (11) and is connected to the clamping plates (13).

6. The tensile test grip of claim 5, wherein, It also includes a top bead (135) and an elastic element (134). The clamping plate (13) is provided with a second through hole (132). The inner wall of the second through hole (132) is provided with a circular groove (133). One end of the elastic element (134) is connected to the bottom of the circular groove (133), and the other end is connected to the top bead (135). The horizontal shaft (12) is provided with a sliding groove (121) that cooperates with the top bead (135). The top bead (135) is slidably installed in the sliding groove (121).

7. The tensile test grip of claim 5, wherein, It also includes a rod (15) for fixing the sample (4), and the clamp (13) is provided with a third through hole (136), and the rod (15) passes through the third through holes (136) of the two clamps (13) in sequence.

8. The tensile test grip of claim 5, wherein, The clamping assembly includes a screw (14), a first through hole on the longitudinal shaft (11), the screw (14) passing through the first through hole and rotatably connected to the longitudinal shaft (11), the screw (14) having a first thread (142) and a second thread (143), the first thread (142) and the second thread (143) being opposite in direction, the first thread (142) and the second thread (143) being located on both sides of the first through hole, and a third screw hole (131) on the clamping plate (13) engaging with the first thread (142) and the second thread (143), the first thread (142) and the second thread (143) passing through the third screw holes (131) of the two clamping plates (13) respectively.

9. The tensile testing fixture according to claim 8, characterized in that, The screw (14) has a second force-adding rod (141) on its side wall for assisting in rotating the screw (14).