Stretching clamp of universal testing machine

Abstract

The utility model discloses a tensile fixture of a universal testing machine, which comprises an upper fixture and a lower fixture which respectively clamp two ends of a to-be-tested component, the upper fixture and the lower fixture are oppositely arranged, each of the upper fixture and the lower fixture comprises a supporting seat, a clamping groove is formed in each supporting seat, a clamping plate assembly capable of synchronously moving is arranged in each clamping groove, and the clamping plate assemblies are arranged on the supporting seats. The clamping plate assembly is used for clamping the end part of a test piece, and a clamping area for placing the end part of the test piece is formed in the clamping plate assembly; the clamping plate assemblies in the upper clamp and the lower clamp can be opened towards the two sides at the same time, the test piece can be loosened synchronously, the test piece can be taken down quickly, or the two ends of the test piece can be clamped inwards at the same time, it is ensured that the test piece cannot incline after being clamped, the accuracy of the test result can be improved, the structure is simple, and operation is easy and convenient.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of universal testing machines, in particular to a tensile clamp of a universal testing machine. BACKGROUND

[0002] The tensile clamp of the universal testing machine is installed on the universal testing machine to fix a test specimen, and the limit tensile force that the test specimen can withstand is tested through the universal testing machine.

[0003] The clamp device suitable for the universal testing machine disclosed in the patent No. CN 210293885 U needs to control the left clamp plate and the right clamp plate to move and clamp the test specimen through the left pull rod and the right pull rod respectively, and the operation is complicated, for example, Figure 1 only the naked eye can be used to observe whether the upper and lower ends of the test specimen 300 clamped by the upper clamp 100 and the lower clamp 200 are aligned, and when the rubber or soft plastic product is subjected to the tensile test, the clamped test specimen 300 is in an inclined state, thereby causing the test specimen to be unevenly stressed, the test result is deviated, and the accuracy of the test result is affected. CONTENT OF THE UTILITY MODEL

[0004] The application provides a tensile clamp of a universal testing machine to solve the problem that the test specimen is easy to be inclined after being clamped in the prior art, and the accuracy of the test result is affected.

[0005] The tensile clamp of the universal testing machine comprises an upper clamp and a lower clamp, which clamp the two ends of a component to be tested respectively, the upper clamp and the lower clamp are arranged oppositely, the upper clamp and the lower clamp each comprise a support seat, a clamping groove is arranged in the support seat, a clamping plate assembly capable of moving synchronously is arranged in the clamping groove, the clamping plate assembly is used for clamping the end of a test specimen, and an end clamping area for placing the test specimen is formed in the clamping plate assembly.

[0006] Preferably, the clamping plate assembly comprises a first clamping plate and a second clamping plate, and a synchronous driving component is arranged to drive the first clamping plate and the second clamping plate to move close to or away from each other.

[0007] Further preferably, the synchronous driving component comprises a connecting rod component in a scissor structure, and a first screw rod is screwed to the support seat, a rotating shaft connected rotatably with the connecting rod component is arranged at the bottom of the clamping groove, the first screw rod is connected with the first clamping plate, and the connecting rod component is slidably connected with the first clamping plate and the second clamping plate at two ends thereof.

[0008] Further preferably, a driving part is arranged on the first screw rod, and the driving part is used to drive the first screw rod to rotate.

[0009] Further preferably, an anti-slip structure is arranged on the inner side of the first clamping plate and the second clamping plate.

[0010] Further preferably, the anti-skid structure is a needle-shaped protrusion.

[0011] Preferably, the support base comprises a base and support walls respectively arranged on both sides of the base, and the base and the support walls are in an integrated structure.

[0012] Preferably, the support base is provided with a connecting rod, and an angle adjusting assembly is arranged between the connecting rod and the support base, and the angle adjusting assembly is used to adjust the angle of the support base.

[0013] Further preferably, the angle adjusting assembly comprises a second screw rod, the second screw rod connects the support base and the connecting rod, and a locking part is arranged on the screw rod to lock the support base.

[0014] Preferably, a guide part is arranged on the support base, and the guide part is used to guide the movement of the clamping plate assembly.

[0015] The beneficial effects of the present application compared with the prior art are:

[0016] (1) The clamping plate assembly in the upper clamp and the lower clamp can be opened to both sides at the same time to loosen the test piece, and the test piece can be quickly taken down, or the clamping plate assembly can be folded inward to clamp both ends of the test piece, so that the test piece will not tilt after clamping is completed, the accuracy of the test result can be improved, and the structure is simple and the operation is simple and convenient.

[0017] (2) The angle adjusting assembly is arranged between the support base and the connecting rod, which can compensate for the included angle between the upper clamp and the lower clamp, avoid the test piece from twisting along its own axis, and further improve the accuracy of the test result. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a simplified diagram of the test piece clamping of the prior art;

[0019] Figure 2 is a perspective view of the present application;

[0020] Figure 3 is a front view of the present application;

[0021] Figure 4 is a top view of the present application.

[0022] In the drawings:

[0023] 100, upper clamp, 200, lower clamp, 300, test piece;

[0024] 1, support base, 10, clamping groove, 11, base, 12, support wall, 13, connecting rod;

[0025] 2, clamp plate assembly, 20, clamping area, 21, first clamp plate, 22, second clamp plate, 23, connecting rod component, 231, connecting rod one, 232, connecting rod two, 233, first screw;

[0026] 3, angle adjustment assembly, 31, second screw, 32, locking component;

[0027] 4, rotating shaft, 5, driving part, 6, anti-skid structure, 7, guide component. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings of the present application. Obviously, the embodiments described in the present application are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0029] In combination Figures 2 to 4 The present application is further described as follows:

[0030] The tensile clamp of the universal testing machine comprises an upper clamp 100 and a lower clamp 200 respectively arranged on the universal testing machine in a relative manner, the upper clamp 100 and the lower clamp 200 are used for clamping two ends of a test piece 300 respectively, and the test piece 300 is subjected to tensile test; wherein the upper clamp 100 and the lower clamp 200 each comprise a support seat 1, the support seat 1 is provided with a clamping groove 10, the clamping groove 10 is provided with a clamp plate assembly 2 moving synchronously, and the clamp plate assembly 2 is used for clamping the end of the test piece 300; the clamp plate assembly 2 forms a clamping area 20 for placing the end of the test piece 300; in the embodiment, the support seat 1 comprises a base 11 and support walls 12 respectively arranged on both sides of the base 11, and the support seat 1 is an integral structure, which can improve the overall structural strength of the support seat 1; of course, the support seat 1 can also be a split structure.

[0031] In the embodiment, the clamp plate assembly 2 comprises a first clamp plate 21 and a second clamp plate 22 arranged in a relative manner, and a synchronous driving component for driving the first clamp plate 21 and the second clamp plate 22 to move synchronously, the first clamp plate 21 and the second clamp plate 22 are arranged in the clamping groove 10, and the clamping area 20 is formed between the first clamp plate 21 and the second clamp plate 22, the synchronous driving component can simultaneously drive the first clamp plate 21 and the second clamp plate 22 to move close to each other in the clamping groove 10 to clamp the end of the test piece 300, or to move away from each other to release the test piece 300.

[0032] Compared with the prior art, the clamp assembly 2 can simultaneously approach and clamp the test piece 300, thereby ensuring that the position of the clamping area 20 is fixed and unchanged, and the test piece 300 does not tilt after being clamped, and the accuracy of the test result can be improved.

[0033] The synchronous driving component includes a scissors structure connecting rod component 23 and a first screw 233 threadedly connected to the support seat 1. The connecting rod component 23 is rotationally connected to the clamping groove 10, and the two ends of the connecting rod component 23 are slidably connected to the first clamp plate 21 and the second clamp plate 22, respectively. The connecting rod component 23 includes a connecting rod one 231 and a connecting rod two 232 rotationally connected in the middle. The two ends of the connecting rod one 231 and the connecting rod two 232 are slidably connected to the first clamp plate 21 and the second clamp plate 22, respectively. The clamping groove 10 is provided with a rotating shaft 4 at the bottom, and the middle of the connecting rod component 23 is rotationally connected to the rotating shaft 4. The first screw 233 can be connected to the first clamp plate 21 or the second clamp plate 22. In this embodiment, the first screw 233 is connected to the first clamp plate 21. The other end of the first screw 233 is provided with a driving part 5 for driving the rotation of the first screw 233. The first clamp plate 21 is moved by pushing or pulling the first clamp plate 21 through the rotation of the first screw 233. The first clamp plate 21 drives the second clamp plate 22 to move synchronously through the connecting rod component 23. The first clamp plate 21 and the second clamp plate 22 are correspondingly close to or away from each other.

[0034] The two ends of the connecting rod one 231 and the connecting rod two 232 are slidably connected to the first clamp plate 21 and the second clamp plate 22, respectively. The connecting rod one 231 and the connecting rod two 232 are provided with sliding shafts, and the first clamp plate 21 and the second clamp plate 22 are provided with sliding grooves at the bottom for placing the sliding shafts. When the first clamp plate 21 and the second clamp plate 22 are close to or away from each other, the sliding shafts slide along the sliding grooves.

[0035] In some embodiments not shown, the synchronous driving component can also drive the first clamp plate 21 and the second clamp plate 22 to be close to or away from each other through a bidirectional screw.

[0036] In an embodiment, the inner sides of the first clamp plate 21 and the second clamp plate 22 are each provided with an anti-skid structure 6 for increasing the friction between the first clamp plate 21, the second clamp plate 22 and the test piece 300, so as to ensure that the test piece 300 can be stably clamped and sliding is avoided. The anti-skid structure 6 can be a plurality of needle-shaped protruding parts or anti-skid lines. Preferably, the anti-skid structure 6 is a needle-shaped protruding part, which can be inserted or pressed into the test piece 300 after clamping, and the fixation is more reliable.

[0037] The bottom of the support seat 1 is provided with a connecting rod 13, which is used to be detachably connected with a universal testing machine; the connecting rod 13 is connected with the support seat 1 through an angle adjusting assembly 3, which is used to adjust the angle of the support seat 1; wherein the angle adjusting assembly 3 comprises a second screw rod 31, which is threadedly connected with the support seat 1 and the connecting rod 13, and is provided with a locking part 32; the locking part 32 is a locking nut, which is used to lock the support seat 1.

[0038] In some embodiments, the support seat 1 is provided with a guide part 7, which is used to guide the movement of the clamping plate assembly 2. The guide part 7 can be a guide rod arranged between the support walls 12, or a guide groove opened in the bottom of the clamping groove 10, which can guide the movement of the clamping plate assembly 2 and avoid the clamping plate assembly 2 from being stuck.

Claims

1. A tensile fixture for a universal testing machine, comprising an upper fixture and a lower fixture for clamping the two ends of a component under test, characterised in that: The upper clamp and the lower clamp are oppositely arranged, and each of the upper clamp and the lower clamp comprises a support seat, a clamping groove is arranged in the support seat, a clamping plate assembly capable of synchronous movement is arranged in the clamping groove, the clamping plate assembly is used for clamping the end of a test piece, and an end clamping area for placing the test piece is formed in the clamping plate assembly; The clamping plate assembly comprises a first clamping plate and a second clamping plate, and a synchronous driving component is arranged to drive the first clamping plate and the second clamping plate to move close to or away from each other; The synchronous driving component comprises a connecting rod component in a scissor structure, and a first screw rod is screwed with the support seat, a rotating shaft connected with the connecting rod component in rotation is arranged at the bottom of the clamping groove, the first screw rod is connected with the first clamping plate, and the connecting rod component is slidably connected with the first clamping plate and the second clamping plate at two ends thereof.

2. The tensile grips for a universal testing machine according to claim 1, characterized in that: A driving portion is arranged on the first screw rod, and the driving portion is used for driving the first screw rod to rotate.

3. The tensile grips for a universal testing machine according to claim 1, characterized in that: Anti-skid structures are arranged on the inner sides of the first clamping plate and the second clamping plate.

4. The tensile grips for a universal testing machine according to claim 3, characterized in that: The anti-skid structures are needle-shaped protruding portions.

5. The tensile grips for a universal testing machine of claim 1, wherein: The support seat comprises a base and support walls arranged on both sides of the base respectively, and the base and the support walls are in an integral structure.

6. The tensile grips for a universal testing machine of claim 1, wherein: A connecting rod is arranged at the bottom of the support seat, an angle adjusting assembly is arranged between the connecting rod and the support seat, and the angle adjusting assembly is used for adjusting the angle of the support seat.

7. The tensile grips of the universal testing machine according to claim 6, characterized in that: The angle adjusting assembly comprises a second screw rod connected with the support seat and the connecting rod, a locking component is arranged on the screw rod, and the locking component is used for locking the support seat.

8. The tensile grips for a universal testing machine of claim 1, wherein: A guide component is arranged on the support seat, and the guide component is used for guiding the movement of the clamping plate assembly.

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