Hydraulic tightening device of tension testing machine

Abstract

The utility model belongs to the technical field of tension testing equipment, and particularly relates to a hydraulic tightening device of a tension testing machine, which comprises a tension testing machine main body and a tension sensor arranged on the surface of the tension testing machine main body, and further comprises two groups of tightening components symmetrically arranged below the tension sensor, the tightening assembly comprises a second rectangular frame arranged below the tension sensor and two L-shaped supports symmetrically and fixedly connected to the surface of the second rectangular frame, the L-shaped supports are fixedly connected with the tension sensor, and the surface of the second rectangular frame is sleeved with a first rectangular frame; the first rectangular frame is fixedly connected with the second rectangular frame; the clamping device can clamp and loosen one end of the to-be-tested material through the operation of the L-shaped bracket, so that a tension test is facilitated, the clamping effect of the to-be-tested material is ensured, and the clamping firmness of the to-be-tested material is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tension testing equipment, and in particular relates to a hydraulic tightening device of a tension testing machine. Background Art

[0002] Tensile testing machine is a mechanical force device used to test the mechanical properties of various materials such as static load, stretching, compression, bending, shearing, tearing, peeling, etc. It is suitable for various physical and mechanical property tests of plastic plates, pipes, special-shaped materials, plastic films, rubber, wires and cables, steel, glass fiber and other materials for material development, physical property testing, teaching research, quality control and other indispensable testing equipment;

[0003] After checking the public (announcement) number: CN205157325U discloses a medical tensile testing machine. This technology discloses "including a base, a column, a linear module, a motor, an upper loading platform, an unloading platform and a tensile sensor, and the column is vertically arranged on the base and other technical solutions, which solves the technical problems of the tensile testing machine in the prior art with complex structure and small stroke, and other technical effects";

[0004] Although this design solves the technical problems of the complex structure and small stroke of the tensile testing machine in the prior art, the material to be tested is easily dropped from the upper clamp due to the small clamping force during the clamping of the material to be tested by the upper clamp, thereby affecting the effect of the tensile test.

[0005] Therefore, a hydraulic clamping device of a tensile testing machine is designed to solve the above problems. Utility Model Content

[0006] To solve the problems raised in the above background technology. The utility model provides a hydraulic tightening device for a tensile testing machine, which can tighten and loosen one end of the material to be tested through the operation of an L-shaped bracket, thereby facilitating the tensile test, ensuring the tightening effect of the material to be tested, and improving the firmness of the tightening of the material to be tested.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydraulic tightening device of a tensile testing machine, comprising a tensile testing machine body and a tensile sensor installed on the surface of the tensile testing machine body, and also comprising two sets of tightening components symmetrically arranged below the tensile sensor;

[0008] The tightening assembly includes a second rectangular frame arranged below the tension sensor and two L-shaped brackets symmetrically fixedly connected to the surface of the second rectangular frame, the L-shaped bracket and the tension sensor are fixedly connected, the surface of the second rectangular frame is sleeved with a first rectangular frame, the first rectangular frame and the second rectangular frame are fixedly connected, two symmetrically arranged clamping rods are inserted inside the first rectangular frame, a third rope is arranged between the two clamping rods, both ends of the third rope are respectively fixedly connected to the two clamping rods, the sides of the two clamping rods away from each other are fixedly connected to the first rope, and the end of the first rope away from the clamping rod is fixedly connected to the gravity block.

[0009] As a preferred hydraulic tightening device of the tensile testing machine of the utility model, a hydraulic rod is installed on the surface of the second rectangular frame, the output shaft of the hydraulic rod passes through a through hole opened on the surface of the second rectangular frame, the output shaft of the hydraulic rod is slidably connected to the second rectangular frame, the surface of the third rope is fixedly connected to the second rope, one end of the second rope away from the third rope is fixedly connected to the end of the output shaft of the hydraulic rod, and the third rope is located inside the second rectangular frame.

[0010] As a preferred hydraulic tightening device of the tensile testing machine of the utility model, two pulleys are installed inside the second rectangular frame, the two pulleys are rotatably connected to the second rectangular frame, the second rope is located between the two pulleys, and the pulley is located above the third rope.

[0011] As a preferred hydraulic tightening device of the tensile testing machine of the utility model, two guide grooves are symmetrically provided on the surface of each clamp rod, the clamp rod is slidably connected to the first rectangular frame through the guide grooves, two through grooves are symmetrically provided on both sides of the first rectangular frame, the first rope is located inside the through groove, and the first rope is slidably connected to the first rectangular frame.

[0012] As a preferred embodiment of the hydraulic tightening device of the tensile testing machine of the utility model, it also includes an auxiliary component arranged on the surface of the clamping rod;

[0013] The auxiliary component includes a rubber plate arranged on a side adjacent to the two clamping rods and a mounting block fixedly connected to the surface of the rubber plate, a protrusion is fixedly connected to the surface of the mounting block, a mounting groove is provided on a side of the clamping rod close to the rubber plate, the mounting block and the protrusion are inserted into the inside of the mounting groove, and the mounting block and the protrusion are slidably connected to the clamping rod through the mounting groove.

[0014] As a preferred embodiment of the hydraulic tightening device of the tensile testing machine of the utility model, a plurality of anti-slip strips are equidistantly arranged on a side of the rubber plate away from the clamping rod, and the anti-slip strips are fixedly connected to the clamping rod.

[0015] Compared with the prior art, the beneficial effect of the utility model is that the tightening component added to the present application can tighten and loosen one end of the material to be tested through the operation of the L-shaped bracket, thereby facilitating the tensile test. At the same time, the auxiliary component is added, which is beneficial to ensure the tightening effect of the material to be tested and improve the firmness of the tightening of the material to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 For this utility model Figure 1 Sectional view at AA in the middle;

[0019] Figure 3 For this utility model Figure 2 Sectional view at point A;

[0020] Figure 4 It is a schematic diagram of the structure of the clamping rod and the third rope in the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the L-shaped bracket and the second rectangular bracket in the utility model;

[0022] Figure 6 It is a schematic diagram of the structure of the rubber plate and the mounting block in the utility model;

[0023] In the figure:

[0024] 1. The main body of the tensile testing machine;

[0025] 2. Clamping assembly; 21. L-shaped bracket; 22. First rectangular frame; 23. Second rectangular frame; 24. Hydraulic rod; 25. First rope; 26. Clamping rod; 27. Second rope; 28. Pulley; 29. ​​Gravity block; 210. Through slot; 211. Third rope; 212. Guide slot;

[0026] 3. Auxiliary components; 31. Rubber sheet; 32. Anti-slip strip; 33. Mounting block; 34. Bump; 35. Mounting slot;

[0027] 4. Tensile sensor. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Example 1

[0030] like Figure 1 As shown;

[0031] The hydraulic tightening device of the tensile testing machine comprises a tensile testing machine body 1 and a tensile sensor 4 installed on the surface of the tensile testing machine body 1 .

[0032] In this implementation scheme: After checking, the public (announcement) number: CN205157325U discloses a medical tensile testing machine. Although this design solves the technical problems of the tensile testing machine in the prior art, such as the complex structure and small stroke, in the process of clamping the test material by the upper clamp, due to the small clamping force, the test material is easy to fall off from the upper clamp, thereby affecting the effect of the tensile test. In order to solve this technical problem, a tightening component 2 and an auxiliary component 3 are added on this basis.

[0033] It should be noted that the tensile testing machine body 1 is composed of a base, a column, a linear module, a motor, an upper platform, an upper platform body, a lifting mechanism, an output interface, a unloading platform, an upper clamp and a lower clamp in a medical tensile testing machine disclosed in the announcement number: CN205157325U. When in use, the motor is started to drive the upper platform body to move along the linear module, the lifting mechanism records the displacement data, and the tensile sensor 4 records the tensile data, thereby calculating the performance indicators such as the stretching, tearing, and deformation rate of the sample.

[0034] More specifically:

[0035] like Figures 1 to 6 As shown:

[0036] In combination with the above content: the tightening assembly 2 includes a second rectangular frame 23 arranged below the tension sensor 4 and two L-shaped brackets 21 symmetrically fixedly connected to the surface of the second rectangular frame 23, the L-shaped bracket 21 is fixedly connected to the tension sensor 4, the surface of the second rectangular frame 23 is sleeved with a first rectangular frame 22, the first rectangular frame 22 and the second rectangular frame 23 are fixedly connected, two symmetrically arranged clamping rods 26 are inserted into the interior of the first rectangular frame 22, a third rope 211 is arranged between the two clamping rods 26, the two ends of the third rope 211 are respectively fixedly connected to the two clamping rods 26, and the two clamping rods 26 are fixedly connected to the two clamping rods 26. The first rope 25 is fixedly connected to the sides of the rods 26 that are away from each other, and the end of the first rope 25 away from the clamping rod 26 is fixedly connected to the gravity block 29. A hydraulic rod 24 is installed on the surface of the second rectangular frame 23. The output shaft of the hydraulic rod 24 passes through the through hole opened on the surface of the second rectangular frame 23. The output shaft of the hydraulic rod 24 is slidably connected to the second rectangular frame 23. A second rope 27 is fixedly connected to the surface of the third rope 211. The end of the second rope 27 away from the third rope 211 is fixedly connected to the end of the output shaft of the hydraulic rod 24. The third rope 211 is located inside the second rectangular frame 23.

[0037] In this embodiment: the hydraulic rod 24 is started by the controller. When the hydraulic rod 24 is running, the output shaft contracts and drives the second rope 27 to move. The movement of the second rope 27 pulls the third rope 211 to slide between the two pulleys 28, thereby driving the clamping rod 26 to slide inside the first rectangular frame 22. When the two clamping rods 26 are close to each other, one end of the material to be tested is tightened. After the tensile testing machine is used, the output shaft of the hydraulic rod 24 is extended, and under the action of the gravity of the two gravity blocks 29, the two clamping rods 26 are driven by the first rope 25 to move away from each other, so that one end of the material to be tested can be taken out of the tightening device. Through the operation of the L-shaped bracket 21, the tightening device can tighten and loosen one end of the material to be tested, thereby facilitating the tensile test.

[0038] It should be noted that: since two sets of tightening components 2 are symmetrically arranged below the tension sensor 4, the two ends of the material to be tested can be tightened and loosened.

[0039] Going further:

[0040] In an optional embodiment, two pulleys 28 are installed inside the second rectangular frame 23 , and the two pulleys 28 are rotatably connected to the second rectangular frame 23 . The second rope 27 is located between the two pulleys 28 , and the pulley 28 is located above the third rope 211 .

[0041] In this embodiment, the two pulleys 28 are provided to facilitate pulling the third rope 211 to move, and the pulley 28 can rotate inside the second rectangular frame 23, thereby reducing the generation of friction during the movement of the third rope 211.

[0042] Going further:

[0043] In an optional embodiment, two guide grooves 212 are symmetrically provided on the surface of each clamping rod 26, and the clamping rod 26 is slidably connected to the first rectangular frame 22 through the guide grooves 212. Two through grooves 210 are symmetrically provided on both sides of the first rectangular frame 22, and the first rope 25 is located inside the through groove 210, and the first rope 25 is slidably connected to the first rectangular frame 22.

[0044] In this embodiment: the setting of the guide groove 212 can limit the position of the clamping rod 26, so that the clamping rod 26 can slide inside the first rectangular frame 22, and the clamping rod 26 and the first rectangular frame 22 are in a vertical state, while ensuring the clamping effect of the clamping rod 26.

[0045] Going further:

[0046] In an optional embodiment, it further includes an auxiliary component 3 disposed on the surface of the clamping rod 26;

[0047] The auxiliary component 3 includes a rubber plate 31 arranged on a side adjacent to the two clamping rods 26 and a mounting block 33 fixedly connected to the surface of the rubber plate 31, a protrusion 34 is fixedly connected to the surface of the mounting block 33, a mounting groove 35 is provided on a side of the clamping rod 26 close to the rubber plate 31, the mounting block 33 and the protrusion 34 are inserted into the inside of the mounting groove 35, the mounting block 33 and the protrusion 34 are slidably connected to the clamping rod 26 through the mounting groove 35, and a plurality of anti-slip strips 32 are equidistantly arranged on a side of the rubber plate 31 away from the clamping rod 26, and the anti-slip strips 32 are fixedly connected to the clamping rod 26.

[0048] In this embodiment: the setting of the rubber sheet 31 can tighten the material to be tested, and the rubber sheet 31 made of rubber material can protect the material to be tested to avoid damage to the material to be tested. The setting of the anti-slip strip 32 can increase the firmness of the material to be tested during the tightening process, which is beneficial to ensure the tightening effect of the material to be tested and improve the firmness of the tightening of the material to be tested.

[0049] It should be noted that applying force to the rubber sheet 31 can cause the protrusion 34 and the mounting block 33 to slide out from the inside of the mounting groove 35, so that the rubber sheet 31 can be replaced. The protrusion 34 and the mounting block 33 are inserted into the inside of the mounting groove 35, and there is a suitable friction force between the mounting block 33 and the clamping rod 26, so that the position of the rubber sheet 31 can be fixed.

[0050] Working principle: When the clamping device is in use, the hydraulic rod 24 is connected to an external power source, and one end of the material to be tested is placed between the two clamping rods 26. The hydraulic rod 24 is started by the controller. When the hydraulic rod 24 is running, the output shaft contracts and drives the second rope 27 to move. The movement of the second rope 27 pulls the third rope 211 to slide between the two pulleys 28, thereby driving the clamping rod 26 to slide inside the first rectangular frame 22. When the two clamping rods 26 are close to each other, one end of the material to be tested is tightened. When the tensile testing machine is finished in use, the output shaft of the hydraulic rod 24 is extended, and under the action of the gravity of the two gravity blocks 29, the two clamping rods 26 are driven by the first rope 25 to move away from each other, so that one end of the material to be tested can be taken out of the clamping device. Since two sets of clamping assemblies 2 are symmetrically arranged below the tension sensor 4, both ends of the material to be tested can be tightened. The L-shaped bracket 21 is used to tighten and loosen the clamping device, and the operation of the L-shaped bracket 21 can tighten and loosen one end of the material to be tested, thereby facilitating the tensile test. In the process of tightening the material to be tested, the setting of the rubber plate 31 can tighten the material to be tested, and the rubber plate 31 made of rubber material can protect the material to be tested to avoid damage to the material to be tested. The setting of the anti-slip strip 32 can increase the firmness of the material to be tested during the tightening process. Applying force to the rubber plate 31 can make the protrusion 34 and the mounting block 33 slide out from the inside of the mounting groove 35, so that the rubber plate 31 can be replaced. The protrusion 34 and the mounting block 33 are inserted into the inside of the mounting groove 35, and there is a suitable friction between the mounting block 33 and the clamping rod 26, so that the position of the rubber plate 31 can be fixed, which is conducive to ensuring the tightening effect of the material to be tested and improving the firmness of the tightening of the material to be tested.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A hydraulic tightening device for a tensile testing machine, comprising a tensile testing machine body (1) and a tensile force sensor (4) mounted on the surface of the tensile testing machine body (1), characterized in that: It also includes two groups of tightening components (2) symmetrically arranged below the tension sensor (4); The tightening assembly (2) comprises a second rectangular frame (23) arranged below the tension sensor (4) and two L-shaped brackets (21) symmetrically fixedly connected to the surface of the second rectangular frame (23); the L-shaped bracket (21) is fixedly connected to the tension sensor (4); a first rectangular frame (22) is sleeved on the surface of the second rectangular frame (23); the first rectangular frame (22) and the second rectangular frame (23) are fixedly connected; two symmetrically arranged clamping rods (26) are inserted inside the first rectangular frame (22); a third rope (211) is arranged between the two clamping rods (26); two ends of the third rope (211) are respectively fixedly connected to the two clamping rods (26); the two sides of the two clamping rods (26) away from each other are fixedly connected to the first rope (25); and the end of the first rope (25) away from the clamping rod (26) is fixedly connected to a gravity block (29).

2. The hydraulic clamping device of the tensile testing machine according to claim 1, characterized in that: A hydraulic rod (24) is installed on the surface of the second rectangular frame (23); an output shaft of the hydraulic rod (24) passes through a through hole provided on the surface of the second rectangular frame (23); the output shaft of the hydraulic rod (24) is slidably connected to the second rectangular frame (23); a second rope (27) is fixedly connected to the surface of the third rope (211); an end of the second rope (27) away from the third rope (211) is fixedly connected to an end of the output shaft of the hydraulic rod (24); and the third rope (211) is located inside the second rectangular frame (23).

3. The hydraulic clamping device of the tensile testing machine according to claim 2, characterized in that: Two pulleys (28) are installed inside the second rectangular frame (23), and the two pulleys (28) are rotatably connected to the second rectangular frame (23). The second rope (27) is located between the two pulleys (28), and the pulley (28) is located above the third rope (211).

4. The hydraulic clamping device of the tensile testing machine according to claim 1, characterized in that: Two guide grooves (212) are symmetrically provided on the surface of each clamping rod (26), and the clamping rod (26) is slidably connected to the first rectangular frame (22) via the guide grooves (212). Two through grooves (210) are symmetrically provided on both sides of the first rectangular frame (22), and the first rope (25) is located inside the through grooves (210), and the first rope (25) and the first rectangular frame (22) are slidably connected.

5. The hydraulic clamping device of the tensile testing machine according to claim 1, characterized in that: It also includes an auxiliary component (3) arranged on the surface of the clamping rod (26); The auxiliary component (3) comprises a rubber plate (31) arranged on a side adjacent to the two clamping rods (26) and a mounting block (33) fixedly connected to the surface of the rubber plate (31); a protrusion (34) is fixedly connected to the surface of the mounting block (33); a mounting groove (35) is provided on a side of the clamping rod (26) close to the rubber plate (31); the mounting block (33) and the protrusion (34) are inserted into the mounting groove (35); and the mounting block (33) and the protrusion (34) are slidably connected to the clamping rod (26) via the mounting groove (35).

6. The hydraulic clamping device of the tensile testing machine according to claim 5, characterized in that: A plurality of anti-slip strips (32) are equidistantly arranged on one side of the rubber plate (31) away from the clamping rod (26), and the anti-slip strips (32) are fixedly connected to the clamping rod (26).

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