Clamping device of tensile testing machine

Abstract

The utility model belongs to the technical field of tensile testing machines, and discloses a clamping device of a tensile testing machine, which comprises a clamping seat and an adjusting mechanism, wedge-shaped clamping blocks and limiting mechanisms are arranged on two side walls in the clamping seat in a sliding manner, clamping grooves and two sliding grooves are formed in adjacent side surfaces of the two wedge-shaped clamping blocks, and the wedge-shaped clamping blocks and the limiting mechanisms are arranged in the clamping seat in a sliding manner. Clamping plates are arranged on the adjacent side faces of the two wedge-shaped clamping blocks in a sliding mode. According to the clamping device, a circular workpiece and a planar workpiece can be clamped in a switching mode, when a circular bar needs to be clamped, only a circular plate needs to be placed between the two wedge-shaped clamping blocks, the clamping plate slides to be away from the circular bar, and it can be guaranteed that the circular bar is clamped and fixed through the two wedge-shaped clamping blocks; when a planar workpiece needs to be clamped, the planar workpiece only needs to be located between the two clamping plates, then the two wedge-shaped clamping blocks get close to each other, the two clamping plates clamp the planar workpiece, and the clamping device does not need to be replaced.

Description

Technical Field

[0001] The utility model belongs to the technical field of tensile testing machines, in particular to a clamping device of a tensile testing machine. Background Art

[0002] The tensile testing machine is mainly suitable for testing metals and materials, such as plastics, wires and cables, optical fiber cables, seat belts, safety belts, leather belts, composite materials, steel pipes, copper materials, profiles, spring steel, bearing steel, stainless steel (and other high hardness steels), castings, steel plates, steel strips, non-ferrous metals, metal wires, and other tests such as stretching, compression, bending, shearing, peeling, tearing, and two-point extension (extensometer is required). Different types of specimens usually need to be fixed with corresponding types of fixtures.

[0003] According to the patent number CN215677844U, a tensile testing machine clamp holder is disclosed; it includes a clamp body, an adjustment mechanism and a clamping device, the bottom front of the clamp body is provided with an inverted trapezoidal blind hole, the clamping device is provided with two said slot-shaped through holes on the transverse fixing plate, bolts are installed in the said slot-shaped through holes, the bolts are fixed in the front of the clamp body with the blind holes, the longitudinal baffle slides up and down along the inclined surfaces on both sides of the blind hole, and clamps the inclined block; compared with the prior art, the opening of the clamp holder of the utility model is a blind hole, which improves the rigidity of the clamp holder; the clamping device is provided with the said slot-shaped through hole, the slot can drive the clamping device to move up and down along the bolt, and moves with the position of the inclined block, with high flexibility and better effect.

[0004] Although the above disclosed device can clamp round bar workpieces, when clamping planar workpieces, due to the setting of the clamping block, the clamping range at both ends of the planar workpiece is small and easy to disengage, and then another set of clamps of different models needs to be replaced, which also increases the workload of personnel during replacement, thereby reducing the practicality of the clamping device. To this end, we provide a clamping device for a tensile testing machine to solve the above problems. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a clamping device for a tensile testing machine.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a clamping device of a tensile testing machine, comprising a clamping seat and an adjustment mechanism, both side walls in the clamping seat are slidably provided with wedge-shaped clamping blocks and a limiting mechanism, adjacent side surfaces of the two wedge-shaped clamping blocks are provided with a clamping groove and two slide grooves, adjacent side surfaces of the two wedge-shaped clamping blocks are slidably provided with a clamping plate, side surfaces of the two clamping plates that are away from each other are fixedly connected with two sliders, and the two sliders are respectively slidably provided in the two slide grooves, and the inner wall of each slide groove is provided with a positioning mechanism for limiting the sliding of the slider.

[0007] In the above technical scheme, preferably, the limiting mechanism includes a first mounting cavity and a limiting plate, the front side of the limiting plate is an inclined surface, and the limiting plate is located in front of the wedge-shaped clamping block, the first mounting cavity is opened on the inner side wall of the clamping seat, the limiting plate is slidably set in the first mounting cavity and extends to the outside of the clamping seat, and a side surface of the limiting plate extending into the first mounting cavity is fixedly connected with a pull rod and a plurality of first compression springs, and the other end of the pull rod passes through the first mounting cavity and extends to the outside of the clamping seat, and the other end of each of the first compression springs is fixedly connected to the inner wall of the first mounting cavity.

[0008] In the above technical solution, preferably, the positioning mechanism includes two second installation cavities opened on the inner wall of the slide groove, the inner walls of the two second installation cavities are slidably provided with positioning blocks and fixedly connected with second compression springs, and one end of the second compression spring is connected to the surface of the positioning block, one end of the two positioning blocks extends to the outside of the second installation cavity, and the slider is located between the two positioning blocks.

[0009] In the above technical solution, preferably, anti-slip grooves are provided in each of the slide grooves and on the surface of each clamping plate.

[0010] In the above technical solution, preferably, two opposite guide grooves are provided on the back of the clamping seat, and a guide block is fixedly connected to the back of each wedge-shaped clamping block, and the guide block is slidably arranged in the guide groove.

[0011] In the above technical solution, preferably, the adjustment mechanism includes a hydraulic cylinder installed on the top of the clamping seat, the telescopic end of the hydraulic cylinder is fixedly connected with a push plate, and the push plate is located in two openings at the top of the two wedge-shaped clamping blocks.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1. The utility model enables the device to switch between round workpieces and planar workpieces through the matching arrangement of the clamping seat, the wedge-shaped clamping block, the clamping plate, the slide groove, the clamping groove and the slide block. When it is necessary to clamp a round bar, it is only necessary to place the round plate between the two wedge-shaped clamping blocks and slide the clamping plate away from the round bar to ensure that the two wedge-shaped clamping blocks clamp and fix the round bar. When it is necessary to clamp a planar workpiece, it is only necessary to place the planar workpiece between the two clamping plates and then, by bringing the two wedge-shaped clamping blocks closer to each other, the two clamping plates clamp the planar workpiece without replacing the clamper, thereby facilitating the clamping and fixing of workpieces of different shapes.

[0014] 2. The utility model is provided with a positioning mechanism. When the clamping plate is not needed, the slider only needs to be slid between the two positioning blocks, so that the two positioning blocks can position the slider, so that the clamping plate is positioned in the slide groove through the slider, so that it will not slide randomly, so that the clamping device can fix the workpiece such as round bars. When the clamping plate is needed to clamp the flat plate or other flat workpiece, the clamping plate only needs to be manually moved to make the slider squeeze the positioning block into the second mounting cavity, thereby releasing the positioning of the slider, so that the clamping plate can slide normally on the surface of the wedge-shaped clamping block.

[0015] The first spring is pressed against the rear face of the locking plate, and the locking plate is pressed against the locking plate to release the locking plate from the front face of the locking plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a rear view structural diagram of the utility model;

[0018] Figure 3 This is a partial cross-sectional view of the utility model from the front;

[0019] Figure 4 This is a schematic diagram of the connection between the wedge-shaped extrusion block and the clamping plate of the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the clamping plate of the utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the wedge-shaped extrusion block of the utility model;

[0022] Figure 7 It is a partial cross-sectional view of the wedge-shaped extrusion block of the utility model;

[0023] Figure 8 For this utility model Figure 3 A magnified schematic diagram of the structure at center A;

[0024] Fig. 9 For this utility model Figure 7 A magnified schematic diagram of the structure at B in the figure.

[0025] In the figure: 1. Clamping seat; 2. Wedge-shaped clamping block; 3. Second compression spring; 4. Guide groove; 5. Guide block; 6. Limit plate; 7. Pull rod; 8. First installation cavity; 9. Clamping plate; 10. Slide groove; 11. Clamping groove; 12. Slider; 13. Positioning block; 14. First compression spring; 15. Second installation cavity. DETAILED DESCRIPTION

[0026] 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.

[0027] like Figures 1 to 9As shown, the utility model provides a clamping device of a tensile testing machine, including a clamping seat 1 and an adjusting mechanism. Both side walls in the clamping seat 1 are slidably provided with a wedge-shaped clamping block 2 and a limiting mechanism. The limiting mechanism is used to prevent the wedge-shaped clamping block 2 from falling from the front of the clamping seat 1, thereby limiting the wedge-shaped clamping block 2 to ensure that the wedge-shaped clamping block 2 can slide normally on the inner side wall of the clamping seat 1. A clamping groove 11 and two sliding grooves 10 are provided on the adjacent side surfaces of the two wedge-shaped clamping blocks 2. The clamping groove 11 is located in the middle of the wedge-shaped clamping block 2 and between the two sliding grooves 10. The top of each sliding groove 10 extends to the clamping Above the holder 1, a clamping plate 9 is slidably arranged on the adjacent side of the two wedge-shaped clamping blocks 2, and two sliders 12 are fixedly connected to the side of the two clamping plates 9 away from each other, and the two sliders 12 are respectively slidably arranged in the two slide grooves 10. Through the setting of the above structure, the device can switch between round workpieces and planar workpieces. When it is necessary to clamp a round bar, it is only necessary to place the round plate between the two wedge-shaped clamping blocks 2 and slide the clamping plate 9 away from the round bar to ensure that the two wedge-shaped clamping blocks 2 clamp the round bar. When it is necessary to clamp a planar workpiece, it is only necessary to place the planar workpiece between the two wedge-shaped clamping blocks 2. The planar workpiece is located between the two clamping plates 9, and then the two wedge-shaped clamping blocks 2 are brought close to each other so that the two clamping plates 9 clamp the planar workpiece, and the two clamping plates 9 slide on the surfaces of the two wedge-shaped clamping blocks 2 respectively, so the two clamping plates 9 are close to each other and squeezed, and the surfaces of the wedge-shaped clamping blocks 2 will not be damaged. The device is an upper clamp, and the lower clamp is a symmetrical arrangement of the device, which ensures that the upper and lower sets of clamping plates 9 will not detach from the wedge-shaped clamping blocks 2. When the circular plate is clamped by the clamping groove 11, if the two clamping plates 9 contact each other and the round bar is not clamped, the wedge clamp can be moved. The holding block 2 is removed, and the clamping plate 9 can be directly removed from the wedge-shaped clamping block 2, and then reinstalled. Whether to install the clamping plate 9 and set the opening range of the clamping groove 11 can be determined according to actual conditions. The inner wall of each slide groove 10 of the clamping plate 9 is provided with a positioning mechanism for limiting the sliding of the slider 12. Through the setting of the positioning mechanism, when the clamping plate 9 is not in use, the positioning mechanism can be used to fix the clamping plate 9 to prevent it from sliding off at will. The machinery, parts and equipment in this device all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0028] like Figure 1 , Figure 3 and Figure 8As shown, the limiting mechanism includes a first mounting cavity 8 and a limiting plate 6, the front side of the limiting plate 6 is an inclined surface, the back side of the limiting plate 6 is a plane, and the limiting plate 6 is located in front of the wedge-shaped clamping block 2. When the wedge-shaped clamping block 2 is located behind the limiting plate 6, the wedge-shaped clamping block 2 can be limited to prevent the wedge-shaped clamping block 2 from sliding down from the front of the clamping seat 1. The first mounting cavity 8 is opened on the inner side wall of the clamping seat 1, and the limiting plate 6 is slidably arranged in the first mounting cavity 8 and extends to the outside of the clamping seat 1. A side surface of the limiting plate 6 extending into the first mounting cavity 8 is fixedly connected with a pull rod 7 and a plurality of first compression springs 14, and the other end of the pull rod 7 passes through the first mounting cavity 8 and extends to the outside of the clamping seat 1, and the other end of each first compression spring 14 is fixedly connected to the inner wall of the first mounting cavity 8. Through the arrangement of the above structure, the installation and disassembly of the wedge-shaped clamping block 2 can be facilitated, and the wedge-shaped clamping block 2 can be easily installed and disassembled. During the specific operation of installing the wedge-shaped clamping block 2, the wedge-shaped clamping block 2 is directly pushed into the clamping seat 1 and the limiting plate 6 is squeezed, so that the limiting plate 6 is squeezed by the back side of the wedge-shaped clamping block 2 to slide into the first installation cavity 8, and the first compression spring 14 is squeezed at the same time, until the wedge-shaped clamping block 2 is completely pushed into the clamping seat 1. At this time, the limiting plate 6 will pop out under the elastic force of the first compression spring 14 to limit the front side of the wedge-shaped clamping block 2, and the front side of the wedge-shaped clamping block 2 contacts the back side of the limiting plate 6, thereby ensuring the subsequent sliding stability of the wedge-shaped clamping block 2. When the wedge-shaped clamping block 2 needs to be removed, it is only necessary to pull the pull rod 7 outward to move, further drive the limiting plate 6 to slide into the first installation cavity 8, so as to release the limit on the wedge-shaped clamping block 2, and then directly pull out the wedge-shaped clamping block 2, which is convenient for personnel to replace the wedge-shaped clamping block 2 or maintain the components.

[0029] like Figure 6 and Fig. 9As shown, the positioning mechanism includes two second installation cavities 15 opened on the inner wall of the slide groove 10, the inner walls of the two second installation cavities 15 are slidably provided with positioning blocks 13 and fixedly connected with second compression springs 3, and one end of the second compression spring 3 is connected to the surface of the positioning blocks 13, one end of the two positioning blocks 13 extends to the outside of the second installation cavity 15, and the slider 12 is located between the two positioning blocks 13, and the end of the positioning block 13 extending into the slide groove 10 is semicircular to ensure that the slider 12 can normally squeeze the positioning block 13 into the second installation cavity 15. With the above-mentioned structure, when the clamping is not needed, When the plate 9 is needed, it is only necessary to slide the slider 12 between the two positioning blocks 13, so that the two positioning blocks 13 can position the slider 12, so that the clamping plate 9 is positioned in the slide groove 10 through the slider 12, so that it will not slide randomly, so that the clamping device can fix the workpiece such as round bars. When the clamping plate 9 is needed to clamp the flat plate or other flat workpiece, it is only necessary to manually move the clamping plate 9 to make the slider 12 squeeze the positioning block 13 into the second mounting cavity 15, thereby releasing the positioning of the slider 12, so that the clamping plate 9 can slide normally on the surface of the wedge-shaped clamping block 2.

[0030] like Figure 4 As shown, anti-slip grooves are provided in each slide groove 10 and on the surface of each clamping plate 9, which can improve the stability of clamping the workpiece and prevent the workpiece from sliding.

[0031] like Figure 1 , Figure 2 and Figure 4 As shown, two opposing guide grooves 4 are provided on the back of the clamping seat 1, and a guide block 5 is fixedly connected to the back of each wedge-shaped clamping block 2, and the guide block 5 is slidably arranged in the guide groove 4. When the wedge-shaped clamping block 2 is installed in the clamping seat 1, the guide block 5 passes through the guide groove 4, which can guide the wedge-shaped clamping block 2, so that the wedge-shaped clamping block 2 can accurately slide in the guide groove 4 through the guide block 5, and the sliding trajectory of the guide block 5 in the guide groove 4 is the same as the sliding trajectory of the wedge-shaped clamping block 2 on the inner wall of the clamping seat 1, and the back of the clamping seat 1 can also position the back of the wedge-shaped clamping block 2.

[0032] like Figure 1 and Figure 3 As shown, the adjustment mechanism includes a hydraulic cylinder installed on the top of the clamping seat 1, and the telescopic end of the hydraulic cylinder is fixedly connected with a push plate, and the push plate is located in the two openings at the top of the two wedge-shaped clamping blocks 2. The hydraulic cylinder and the push plate are both existing mature technologies. The push plate can be moved in the openings at the top of the two wedge-shaped clamping blocks 2 under the operation of the hydraulic cylinder, and then the two wedge-shaped clamping blocks 2 can be pushed or pulled to move up and down synchronously, thereby realizing the subsequent clamping of the workpiece by the two wedge-shaped clamping blocks 2 without the need for personnel to manually rotate parts.

[0033] The working principle and use process of the utility model are as follows: when it is necessary to clamp a round bar, the round plate only needs to be placed between the two wedge-shaped clamping blocks 2, and then the adjustment mechanism is controlled to make the two wedge-shaped clamping blocks 2 slide downward and approach each other, so as to clamp and fix the round bar between the two clamping grooves 11, and the lower clamp also performs the above steps. When it is necessary to clamp a planar workpiece, the two clamping plates 9 in the upper clamp are slid downward, and then the two clamping plates 9 in the lower clamp are slid upward, and then the planar workpiece is clamped. The two ends are located between the two groups of clamping plates 9, and then the two wedge-shaped clamping blocks 2 are brought close to each other, so that the two clamping plates 9 clamp the planar workpiece without replacing the clamp, thereby facilitating the clamping and fixing of workpieces of different shapes. When the wedge-shaped clamping block 2 needs to be removed, it is only necessary to pull the pull rod 7 outward to move it, and further drive the limit plate 6 to slide into the first installation cavity 8, so as to release the limit on the wedge-shaped clamping block 2, and then the wedge-shaped clamping block 2 can be directly pulled out, which is beneficial for personnel to replace the wedge-shaped clamping block 2 or maintain the components.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Contents not described in detail in the specification belong to the prior art known to professional and technical personnel in this field.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A clamping device for a tensile testing machine, comprising a clamping seat (1) and an adjustment mechanism, characterized in that: Both side walls in the clamping seat (1) are slidably provided with wedge-shaped clamping blocks (2) and a limiting mechanism, and adjacent sides of the two wedge-shaped clamping blocks (2) are provided with a clamping groove (11) and two sliding grooves (10), and adjacent sides of the two wedge-shaped clamping blocks (2) are slidably provided with a clamping plate (9), and the sides of the two clamping plates (9) that are away from each other are fixedly connected with two sliding blocks (12), and the two sliding blocks (12) are respectively slidably provided in the two sliding grooves (10), and the inner wall of each sliding groove (10) is provided with a positioning mechanism for limiting the sliding of the sliding block (12).

2. The clamping device of a tensile testing machine according to claim 1, characterized in that: The limiting mechanism comprises a first mounting cavity (8) and a limiting plate (6), the front side of the limiting plate (6) is an inclined surface, and the limiting plate (6) is located in front of the wedge-shaped clamping block (2), the first mounting cavity (8) is opened on the inner wall of the clamping seat (1), the limiting plate (6) is slidably arranged in the first mounting cavity (8) and extends to the outside of the clamping seat (1), and a pull rod (7) and a plurality of first compression springs (14) are fixedly connected to a side surface of the limiting plate (6) extending into the first mounting cavity (8), and the other end of the pull rod (7) passes through the first mounting cavity (8) and extends to the outside of the clamping seat (1), and the other end of each of the first compression springs (14) is fixedly connected to the inner wall of the first mounting cavity (8).

3. The clamping device of a tensile testing machine according to claim 1, characterized in that: The positioning mechanism comprises two second installation cavities (15) opened on the inner wall of the slide groove (10), the inner walls of the two second installation cavities (15) are slidably provided with positioning blocks (13) and fixedly connected with second compression springs (3), and one end of the second compression spring (3) is connected to the surface of the positioning block (13), one end of the two positioning blocks (13) extends to the outside of the second installation cavity (15), and the slider (12) is located between the two positioning blocks (13).

4. The clamping device of a tensile testing machine according to claim 1, characterized in that: Anti-slip grooves are provided inside each slide groove (10) and on the surface of each clamping plate (9).

5. The clamping device of a tensile testing machine according to claim 1, characterized in that: The back of the clamping seat (1) is provided with two opposite guide grooves (4), and the back of each wedge-shaped clamping block (2) is fixedly connected with a guide block (5), and the guide block (5) is slidably arranged in the guide groove (4).

6. The clamping device of a tensile testing machine according to claim 1, characterized in that: The adjustment mechanism comprises a hydraulic cylinder mounted on the top of the clamping seat (1), the telescopic end of the hydraulic cylinder is fixedly connected with a push plate, and the push plate is located in two openings at the top of the two wedge-shaped clamping blocks (2).

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