Tool clamp for geotechnical cloth tensile resistance test

Abstract

The utility model discloses a work fixture for geotechnical cloth tensile resistance test, and relates to the technical field of work fixtures, the work fixture comprises a support assembly and a clamping assembly, the support assembly is composed of a U-shaped seat, a first transverse plate, a second transverse plate and a fixed side plate, and the clamping assembly is used for clamping geotechnical cloth; the clamping assembly comprises a clamping unit and a quick release unit; the clamping unit is used for clamping geotechnical cloth with different thicknesses; and the quick release unit is used for quickly releasing the clamping of the geotechnical cloth by the clamping unit and realizing quick clamping operation of the geotechnical cloth with the same thickness at the same time. According to the utility model, by arranging the clamping assembly, the geotechnical cloth can be conveniently clamped and fixed, and when a batch of geotechnical cloth samples with the same thickness are tested, the geotechnical cloth samples can be clamped or unclamped only by pulling the handle, so that compared with a traditional structure which needs to frequently screw bolts, the operation is simpler and more efficient, and the working efficiency is improved. And the batch test efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling fixtures, in particular to a tooling fixture for testing the tensile strength of geotextiles. Background Art

[0002] Geotextile, also known as geotextile, is a permeable geosynthetic material made of synthetic fibers through needle punching or weaving. The tensile strength of geotextile is one of the most important quality indicators of geotextile. The test method is:

[0003] Randomly select 5cm wide geotextile samples and test them on an electronic universal material testing machine. In order to prevent the non-woven geotextile from shrinking under load and causing deviation in the test results, 10cm wide and 20cm long samples are usually used for tensile testing at a rate of 20mm / min.

[0004] Most existing geotextile testing fixtures use bolts to tighten and squeeze the movable clamp to move, so that the movable clamp and the fixed clamp are close to each other to clamp the geotextile. The operation is simple. However, when testing multiple batches of geotextiles of the same model and thickness, the bolt tightening and loosening operations need to be repeated for each test. In order to simplify this operation, a tooling fixture for geotextile tensile testing is provided. Utility Model Content

[0005] The purpose of the present invention is to provide a tooling fixture for testing the tensile strength of geotextiles in order to solve the above-mentioned problems.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tooling fixture for testing the tensile strength of geotextiles, comprising a bracket assembly consisting of a U-shaped seat, a first transverse plate, a second transverse plate, and a fixed side plate, wherein the first transverse plate and the second transverse plate are symmetrically fixed to the tops of the two vertical portions of the U-shaped seat, two fixed side plates are provided, the two fixed side plates are symmetrically distributed between the first transverse plate and the second transverse plate and are connected and fixed to the first transverse plate and the second transverse plate by bolts, a clamping assembly is provided inside the rectangular structure consisting of the first transverse plate, the second transverse plate, and the fixed side plate, and the clamping assembly is used to clamp the geotextile;

[0007] The clamping assembly includes a clamping unit and a quick release unit;

[0008] The clamping unit is used to realize the clamping operation of geotextiles of different thicknesses;

[0009] The quick release unit is used to enable the clamping unit to quickly release the clamping of the geotextile, and at the same time achieve a quick clamping operation of geotextiles of the same thickness.

[0010] As a further solution of the present invention: the clamping unit includes a fixed clamping plate, a movable base, an L-shaped arm, a fixed guide rod, a movable clamping plate, a first return spring, and an adjusting bolt;

[0011] The fixed clamping plate is fixed to the end surface of the second transverse plate close to the first transverse plate by bolts, the movable base is distributed between the two fixed side plates and close to the first transverse plate, the L-shaped arm is symmetrically fixed to both sides of one end of the movable base and passes through the second transverse plate, and the second transverse plate is provided with a through hole for the L-shaped arm to pass through;

[0012] The fixed guide rod is distributed on the inner side of the L-shaped arm, and the two ends of the fixed guide rod are respectively fixedly connected to the end surface of the L-shaped arm and the end surface of the movable base. The movable splint is slidably sleeved on the outer side of the fixed guide rod and distributed between the fixed splint and the movable base. The first return spring is sleeved on the outer side of the fixed guide rod and located between the movable splint and the end surface of the L-shaped arm.

[0013] The adjusting bolt is threadedly connected to the movable base and passes through the movable base to fit the end surface of the movable clamping plate. The movable clamping plate is squeezed close to the fixed clamping plate by tightening the adjusting bolt to achieve clamping of the geotextile.

[0014] As a further solution of the present invention: the quick release unit includes a fixed block, a cam, a handle, and a second return spring;

[0015] The fixed blocks are symmetrically fixed to both sides of the outer wall of the movable base, and the sides of the fixed side plates are provided with limiting sliding grooves for the fixed blocks to slide in a limited manner. The second return spring is distributed inside the limiting sliding grooves, and the two ends of the second return spring are respectively attached to the fixed blocks and the end faces of the second horizontal plate.

[0016] A rotation slot is formed on the top of the first horizontal plate and passes through both ends of the first horizontal plate. The cam is rotatably connected to the inner side of the rotation slot. The handle is fixed to the outer side of the cam. The handle is located at the end of the first horizontal plate away from the second horizontal plate.

[0017] The cam is rotated to make the cam protrusion contact and squeeze the movable base, so as to achieve the synchronous movement of the movable base and the movable splint away from the fixed splint, thereby releasing the clamping of the geotextile. The cam is rotated to make the cam protrusion squeeze the movable base, so as to achieve the synchronous movement of the movable base and the movable splint close to the fixed splint, thereby achieving rapid clamping of geotextiles of the same thickness.

[0018] As a further solution of the present invention: a perforated groove for the adjusting bolt to pass through is formed on the first transverse plate, and the inner diameter of the perforated groove is larger than the outer diameter of the screw rod of the adjusting bolt.

[0019] As a further solution of the present invention: corresponding assembly holes and threaded holes are respectively provided on the first transverse plate, the second transverse plate, the fixed side plate and the fixed splint;

[0020] The bottom end of the U-shaped seat is provided with a connection hole for connecting with an electronic universal material testing machine.

[0021] As a further solution of the present invention: a horizontal hole groove for installing the cam shaft is opened inside the first horizontal plate, and the horizontal hole groove passes through an assembly hole on the first horizontal plate and extends to both sides of the outside of the first horizontal plate.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] By setting up a clamping component, the geotextile can be conveniently clamped and fixed. When testing a batch of geotextile samples of the same thickness, the geotextile sample can be clamped or released by simply turning the handle. Compared with the traditional structure that requires frequent tightening of bolts, the operation is simpler and more efficient, which can effectively improve the efficiency of batch testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of the utility model;

[0025] Figure 2 This is a structural diagram of the utility model from another perspective;

[0026] Figure 3 This is a schematic diagram of the disassembly of the utility model;

[0027] Figure 4 This is a schematic diagram of the utility model in a disassembled state from another perspective;

[0028] Figure 5 This is a schematic diagram of the disassembly of the cam and the first transverse plate of the utility model.

[0029] In the figure: 1. Bracket assembly; 101. U-shaped seat; 102. First horizontal plate; 103. Second horizontal plate; 104. Fixed side plate; 105. Perforated groove; 106. Rotating groove; 107. Limiting slide groove; 108. Through-hole; 109. Connecting hole; 110. Assembly hole; 111. Threaded hole; 112. Horizontal hole groove; 2. Clamping assembly; 201. Fixed splint; 202. Moving base; 203. Fixed block; 204. L-shaped arm; 205. Fixed guide rod; 206. Movable splint; 207. First return spring; 208. Adjusting bolt; 209. Cam; 210. Handle; 211. Second return spring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figures 1 to 5 In an embodiment of the present invention, a tooling fixture for testing the tensile strength of a geotextile comprises a bracket assembly 1 consisting of a U-shaped seat 101, a first transverse plate 102, a second transverse plate 103, and a fixed side plate 104. The first transverse plate 102 and the second transverse plate 103 are symmetrically fixed to the tops of the two vertical portions of the U-shaped seat 101. Two fixed side plates 104 are provided. The two fixed side plates 104 are symmetrically distributed between the first transverse plate 102 and the second transverse plate 103 and are connected and fixed to the first transverse plate 102 and the second transverse plate 103 by bolts. A clamping assembly 2 is provided inside the rectangular structure consisting of the first transverse plate 102, the second transverse plate 103, and the fixed side plate 104. The clamping assembly 2 is used to clamp the geotextile.

[0032] The clamping assembly 2 includes a clamping unit and a quick release unit;

[0033] The clamping unit is used to realize the clamping operation of geotextiles of different thicknesses;

[0034] The quick release unit is used to quickly release the clamping unit from the geotextile, and simultaneously achieve the quick clamping operation of geotextiles of the same thickness;

[0035] The clamping unit includes a fixed clamping plate 201, a movable base 202, an L-shaped arm 204, a fixed guide rod 205, a movable clamping plate 206, a first return spring 207, and an adjusting bolt 208;

[0036] The fixed clamping plate 201 is fixed to the end surface of the second transverse plate 103 near the first transverse plate 102 by bolts. The movable base 202 is distributed between the two fixed side plates 104 and near the first transverse plate 102. The L-shaped arms 204 are symmetrically fixed to both sides of one end of the movable base 202 and pass through the second transverse plate 103. The second transverse plate 103 is provided with a through-hole 108 for the L-shaped arms 204 to pass through.

[0037] The fixed guide rod 205 is distributed on the inner side of the L-shaped arm 204, and the two ends of the fixed guide rod 205 are fixedly connected to the end surface of the L-shaped arm 204 and the end surface of the movable base 202 respectively. The movable clamping plate 206 is slidably sleeved on the outer side of the fixed guide rod 205 and distributed between the fixed clamping plate 201 and the movable base 202. The first return spring 207 is sleeved on the outer side of the fixed guide rod 205 and located between the movable clamping plate 206 and the end surface of the L-shaped arm 204.

[0038] The adjusting bolt 208 is threadedly connected to the movable base 202 and passes through the movable base 202 to fit the end surface of the movable clamping plate 206. By tightening the adjusting bolt 208, the movable clamping plate 206 is squeezed close to the fixed clamping plate 201 to achieve the clamping of the geotextile;

[0039] The quick release unit includes a fixed block 203, a cam 209, a handle 210, and a second return spring 211;

[0040] The fixed blocks 203 are symmetrically fixed to the outer walls of the movable base 202. The fixed side plates 104 are provided with limiting grooves 107 for the fixed blocks 203 to slide in a limited manner. The second return spring 211 is located inside the limiting grooves 107, and the two ends of the second return spring 211 are respectively attached to the end surfaces of the fixed blocks 203 and the second transverse plate 103.

[0041] A rotation slot 106 is formed on the top of the first horizontal plate 102 and passes through both ends of the first horizontal plate 102. A cam 209 is rotatably connected to the inner side of the rotation slot 106. A handle 210 is fixed to the outer side of the cam 209. The handle 210 is located at the end of the first horizontal plate 102 away from the second horizontal plate 103.

[0042] The cam 209 is rotated to make the raised portion of the cam 209 contact and squeeze the mobile base 202, so as to achieve the mobile base 202 and the movable splint 206 to move away from the fixed splint 201 synchronously, thereby releasing the clamping of the geotextile. The cam 209 is rotated to make the raised portion of the cam 209 squeeze the mobile base 202, so as to achieve the mobile base 202 and the movable splint 206 to move close to the fixed splint 201 synchronously, thereby achieving rapid clamping of geotextiles of the same thickness.

[0043] In this embodiment, the fixtures are used in pairs and installed on a universal material testing machine. The clamping operation for the geotextile is as follows:

[0044] The end of the geotextile sample is placed between the fixed clamping plate 201 and the movable clamping plate 206, and then the adjusting bolt 208 is tightened. The adjusting bolt 208 moves spirally based on the screw hole on the movable base 202, and squeezes the movable clamping block 206 to move closer to the fixed clamping plate 201. Its first return spring 207 is squeezed and contracted, and finally the geotextile is clamped between the movable clamping block 206 and the fixed clamping plate 201. At this time, the clamping of a single end of the geotextile sample is completed (it should be noted that: at this time, the raised part of the cam 209 is in a squeezed and contracted state against the movable base 202, and the second return spring 211 is in a squeezed and contracted state). Then, the same operation can be performed on the other end of the geotextile sample and the other fixture. After that, the universal material testing machine can be started. The operation of the universal material testing machine drives the two fixtures to move away, thereby realizing the tensile test of the geotextile sample.

[0045] After the test is completed, the universal material testing machine runs in the reverse direction to restore the two fixtures to their initial positions. At this time, the cam 209 is rotated by pulling the handle 210, so that the protrusion of the cam 209 releases the squeeze on the movable base 202. At this time, the movable base 202 will move closer to the first cross plate 102 under the elastic force of the second return spring 211. The movable base 202 will drive the L-shaped arm 204, the fixed guide rod 205, the movable clamping plate 206, the first return spring 207 and the adjusting bolt 208 to move synchronously, and the movable clamping plate 206 will move away from the fixed clamping plate 201 to release the clamping operation on the geotextile.

[0046] During the secondary test, if a geotextile sample of the same thickness is to be tested, it is only necessary to place the end of the geotextile sample between the movable clamping plate 206 and the fixed clamping plate 201, and then pull the handle 210 to drive the cam 209 to rotate, so that the raised part of the cam 209 rotates and squeezes the movable base 202. At this time, the movable base 202 and the movable clamping plate 206 will move synchronously close to the fixed clamping plate 201 to achieve the clamping of the geotextile sample.

[0047] If the thickness of the geotextile sample is different during the second test, the handle 210 can be pulled to move the movable base 202 back to the initial state, and then the spacing between the movable clamping plate 206 and the fixed clamping plate 201 can be adjusted by rotating the adjusting bolt 208 to adapt to the clamping operation of geotextile samples of different thicknesses;

[0048] Through the coordination of the above multiple parts, when testing a batch of geotextile samples of the same thickness, the geotextile samples can be clamped or released by simply turning the handle 210. Compared with the traditional structure that requires frequent tightening of bolts, the operation is simpler and more efficient, and can effectively improve the efficiency of batch testing.

[0049] Please refer to Figures 1 to 5 The first horizontal plate 102 is provided with a through-hole slot 105 for the adjusting bolt 208 to pass through. The inner diameter of the through-hole slot 105 is larger than the outer diameter of the screw of the adjusting bolt 208 .

[0050] In this embodiment, the perforated slot 105 is provided so that the movement of the adjusting bolt 208 will not interfere with the first transverse plate 102 .

[0051] Please refer to Figures 1 to 5 , corresponding assembly holes 110 and threaded holes 111 are respectively opened on the first transverse plate 102 , the second transverse plate 103 , the fixed side plate 104 , and the fixed clamping plate 201 ;

[0052] The bottom end of the U-shaped seat 101 has a connection hole 109 for connecting to the electronic universal material testing machine;

[0053] A horizontal hole slot 112 for mounting the rotating shaft of the cam 209 is defined inside the first transverse plate 102 . The horizontal hole slot 112 passes through an assembly hole 110 on the first transverse plate 102 and extends to both sides of the exterior of the first transverse plate 102 .

[0054] In this embodiment, this structure can realize convenient assembly of the bracket assembly 1 and the clamping assembly 2 .

[0055] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A jig for testing the tensile strength of geotextiles, comprising a bracket assembly (1) consisting of a U-shaped seat (101), a first transverse plate (102), a second transverse plate (103), and a fixed side plate (104), wherein the first transverse plate (102) and the second transverse plate (103) are symmetrically fixed to the tops of the two vertical portions of the U-shaped seat (101), and two fixed side plates (104) are provided, and the two fixed side plates (104) are symmetrically distributed between the first transverse plate (102) and the second transverse plate (103) and are connected and fixed to the first transverse plate (102) and the second transverse plate (103) by bolts, characterized in that: A clamping assembly (2) is provided inside the rectangular structure composed of the first transverse plate (102), the second transverse plate (103), and the fixed side plate (104), and the clamping assembly (2) is used to clamp the geotextile; The clamping assembly (2) comprises a clamping unit and a quick release unit; The clamping unit is used to realize the clamping operation of geotextiles of different thicknesses; The quick release unit is used to quickly release the clamping unit from the geotextile and simultaneously achieve a quick clamping operation of geotextiles of the same thickness; The clamping unit comprises a fixed clamping plate (201), a movable base (202), an L-shaped arm (204), a fixed guide rod (205), a movable clamping plate (206), a first return spring (207), and an adjusting bolt (208); The fixed clamping plate (201) is fixed to an end surface of the second transverse plate (103) close to the first transverse plate (102) by bolts, the movable base (202) is distributed between the two fixed side plates (104) and close to the first transverse plate (102), the L-shaped arm (204) is symmetrically fixed to both sides of one end of the movable base (202) and passes through the second transverse plate (103), and a through hole (108) for the L-shaped arm (204) to pass through is opened on the second transverse plate (103); The fixed guide rod (205) is distributed on the inner side of the L-shaped arm (204), and the two ends of the fixed guide rod (205) are fixedly connected to the end surface of the L-shaped arm (204) and the end surface of the movable base (202), respectively; the movable clamping plate (206) is slidably sleeved on the outer side of the fixed guide rod (205) and distributed between the fixed clamping plate (201) and the movable base (202); the first return spring (207) is sleeved on the outer side of the fixed guide rod (205) and located between the movable clamping plate (206) and the end surface of the L-shaped arm (204); The adjusting bolt (208) is threadedly connected to the movable base (202) and passes through the movable base (202) to fit the end surface of the movable clamping plate (206). The adjusting bolt (208) is tightened to squeeze the movable clamping plate (206) close to the fixed clamping plate (201) to achieve clamping of the geotextile; The quick release unit comprises a fixed block (203), a cam (209), a handle (210), and a second return spring (211); The fixed block (203) is symmetrically fixed to both sides of the outer wall of the movable base (202); a limiting sliding groove (107) for limiting the sliding of the fixed block (203) is provided on the side of the fixed side plate (104); the second return spring (211) is distributed inside the limiting sliding groove (107); and the two ends of the second return spring (211) are respectively attached to the end surface of the fixed block (203) and the second transverse plate (103); A rotation slot (106) is provided on the top of the first transverse plate (102) and passes through both ends of the first transverse plate (102); the cam (209) is rotatably connected to the inner side of the rotation slot (106); the handle (210) is fixed to the outer side of the cam (209), and the handle (210) is located at an end of the first transverse plate (102) away from the second transverse plate (103); The cam (209) is rotated to release the squeeze of the movable base (202) by the raised portion of the cam (209), so as to achieve the synchronous movement of the movable base (202) and the movable clamping plate (206) away from the fixed clamping plate (201), thereby releasing the clamping of the geotextile. The cam (209) is rotated to cause the raised portion of the cam (209) to squeeze the movable base (202), so as to achieve the synchronous movement of the movable base (202) and the movable clamping plate (206) close to the fixed clamping plate (201), thereby achieving rapid clamping of geotextiles of the same thickness.

2. A geotextile tensile strength test fixture according to claim 1, characterized in that: The first transverse plate (102) is provided with a perforated groove (105) for the adjusting bolt (208) to pass through, and the inner diameter of the perforated groove (105) is larger than the outer diameter of the screw of the adjusting bolt (208).

3. The geotextile tensile strength test fixture according to claim 1, characterized in that: The first transverse plate (102), the second transverse plate (103), the fixed side plate (104), and the fixed clamping plate (201) are respectively provided with corresponding assembly holes (110) and threaded holes (111); The bottom end of the U-shaped seat (101) is provided with a connection hole (109) for connecting to an electronic universal material testing machine.

4. The geotextile tensile strength test fixture according to claim 1, characterized in that: A horizontal hole groove (112) for mounting a rotating shaft of a cam (209) is provided inside the first transverse plate (102). The horizontal hole groove (112) passes through an assembly hole (110) on the first transverse plate (102) and extends to both sides of the outside of the first transverse plate (102).

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