Tensile machine clamp for preventing test piece from sliding

Abstract

The utility model relates to the technical field of tensile machine clamps, and discloses a tensile machine clamp capable of preventing a test piece from slipping, which comprises a mounting plate, the rear side wall surface of the mounting plate protrudes outwards, a mounting insertion hole for connection is formed in the mounting plate, and the front end of the mounting plate is of a hollow structure. During clamping, after the two protection plates get close to each other, an object firstly makes contact with the protruding block parts on the surfaces of the protection plates, and after the object continues to go deep into the mounting plate, the rubber layers on the rear sections of the side edges of the protection plates will make contact with the surface of the object; the adjusting bolt is continuously rotated to drive the movable pressing plate to enable the two protection plates to be close to each other to increase the friction force between the rubber layer and the surface of the object, so that the object is difficult to slide during testing, the protection plates are more convenient to detach when being abraded, the integrity of the surfaces of the protection plates can be kept, the friction force is prevented from being reduced, and the clamping performance of the device is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tensile machine fixtures, in particular to a tensile machine fixture for preventing test pieces from slipping. Background Technique

[0002] During the use of a tensile machine, fixtures are required to fix workpieces. The existing tensile machine fixtures use clamping arms to fix workpieces, and anti-slip structures are installed inside the clamping arms to prevent the clamped objects from sliding. The existing anti-slip structures are integrated with the clamping arms, and when damaged, the clamping arms need to be replaced together, making it very troublesome to disassemble and replace the clamping arms frequently. Therefore, a tensile machine fixture for preventing test pieces from slipping is proposed. Content of the Utility Model

[0003] The utility model mainly solves the technical problems existing in the above-mentioned prior art, and provides a tensile machine fixture for preventing test pieces from slipping.

[0004] To achieve the above object, the utility model adopts the following technical solutions. It includes a mounting plate. The rear side wall of the mounting plate protrudes outward and is internally provided with a mounting jack for connection. The front end of the mounting plate is a hollow structure. A limiting cavity is provided on the inner wall surface of the mounting plate. A moving pressure plate is inserted and installed inside the limiting cavity. Positioning holes are provided on both the left and right sides inside the limiting cavity. The positioning holes communicate with the outside of the mounting plate and the inner wall surface is provided with threads. An installation bolt is inserted and fixed between the two positioning holes. Clamping grooves are provided on the inner left and right side wall surfaces at the front end of the mounting plate. Protective plates are inserted and installed inside the two clamping grooves. The protruding length of the front end of the mounting plate on the right side is one-half of that on the left side. An adjustment jack is provided inside the front end of the right side of the mounting plate. An adjustment bolt is inserted and installed inside the adjustment jack. The front end of the adjustment bolt passes through the adjustment jack and enters the inside of the mounting plate.

[0005] Further, an access groove for the front end of the adjustment bolt to press against is provided on the rear wall surface of the moving pressure plate. The end of the moving pressure plate is a semi-circular structure and a sleeved sliding hole is provided inside. The moving pressure plate is sleeved outside the installation bolt through the sleeved sliding hole.

[0006] Further, trapezoidal protrusions arranged at equal intervals are provided on the outer surface of the protective plate, and a rubber layer is installed on the rear half section of the outer surface of the protective plate.

[0007] Further, clamping grooves are also provided on one side wall surface inside the mounting plate corresponding to the moving pressure plate. Equal-distance arranged alignment jacks are provided on the inner bottom surfaces of the two clamping grooves, and threads are provided inside the alignment jacks.

[0008] Furthermore, the surface of the protrusion arranged on the surface of the protective plate is provided with equidistantly arranged locking holes, the internal size of the locking holes matches the inner diameter of the alignment holes, and after the protective plate is inserted into the interior of the card slot, bolts are passed through the alignment holes to connect to the interior of the locking holes for locking.

[0009] Beneficial Effects

[0010] The utility model provides a tensile machine clamp for preventing a test piece from slipping, which has the following beneficial effects:

[0011] 1. A tensile testing machine fixture for preventing a test piece from slipping, which is provided with a mobile pressing plate with stable force. After the end of the mobile pressing plate is inserted into the interior of a limiting cavity, a mounting bolt is inserted and installed between two positioning holes. The mobile pressing plate is mounted on the outside of the mounting bolt through a set sliding hole at the end. After the mobile pressing plate is installed, no vertical displacement occurs during movement. The adjusting bolt is inserted into the adjusting socket and rotated deep into an access groove provided on the surface of the mobile pressing plate for docking. The adjusting bolt acts on the middle section of the mobile pressing plate so that when the mobile pressing plate is pushed to move, the entire section of the mobile pressing plate is subjected to uniform force. When clamping an object, the internal size of the opening part of the mounting plate is controlled by rotating the adjusting bolt, which is very convenient to use.

[0012] 2. A tensile testing machine fixture for preventing a test piece from slipping, which is provided with a protective plate that is easy to disassemble and assemble. After the protective plate is inserted into the interior of the card slot, a bolt is inserted from the alignment socket opened on the outer surface of the mounting plate, and then connected to the locking socket opened inside the protective plate and rotated and locked. The protective plate is locked in the corresponding card slot by multiple bolts. Since the surface of the protective plate is a segmented design, the surface of the front section of the side of the protective plate is a trapezoidal block protruding structure with grooves on the surface, and a rubber layer is installed on the surface of the rear section of the side of the protective plate, and the protruding length of the rubber layer is greater than the front section. The protrusion at the end extends to a certain length. When clamping, after the two protective plates are close to each other, the object first contacts the protrusion part on the surface of the protective plate. After the object continues to penetrate into the interior of the mounting plate, the rubber layer on the rear side of the protective plate will contact the surface of the object. Continuously rotating the adjusting bolt drives the moving pressure plate to bring the two protective plates closer to each other to increase the friction between the rubber layer and the surface of the object, making it more difficult for the object to slide during testing. It is also more convenient to remove the protective plate when it is worn, and the integrity of the surface of the protective plate can be maintained to avoid reducing friction, thereby greatly improving the clamping performance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which the utility model can be implemented, so they have no substantial technical significance.

[0014] Figure 1 It is the overall schematic diagram of the device;

[0015] Figure 2 This is a schematic diagram of the interior of the front end of the mounting plate;

[0016] Figure 3 Schematic diagram of the movable platen structure.

[0017] Legend:

[0018] 1. Mounting plate; 2. Mounting socket; 3. Limiting cavity; 4. Positioning hole; 5. Mounting bolt; 6. Card-mounting slot; 7. Protective plate; 8. Adjusting socket; 9. Adjusting bolt; 10. Locking socket; 11. Moving pressure plate; 12. Alignment socket; 13. Set slide hole; 14. Access slot. DETAILED DESCRIPTION

[0019] A tensile machine fixture that prevents the specimen from slipping, such as Figures 1 to 3 As shown, it includes a mounting plate 1, the rear side wall of the mounting plate 1 protrudes outward and is provided with a mounting socket 2 for connection inside, the front end of the mounting plate 1 is a hollow structure, a limiting cavity 3 is provided on the inner wall of the mounting plate 1, a movable pressing plate 11 is inserted and installed inside the limiting cavity 3, positioning holes 4 are provided on the left and right sides of the limiting cavity 3, the positioning holes 4 are connected to the outside of the mounting plate 1 and the inner wall is provided with threads, a mounting bolt 5 is inserted and fixed between the two positioning holes 4, card-mounting grooves 6 are provided on the left and right side walls of the front end of the mounting plate 1, and protective plates 7 are inserted and installed inside the two card-mounting grooves 6, the front end of the mounting plate 1 extends out to half the length of the left side on the right side, an adjusting socket 8 is provided inside the right front end of the mounting plate 1, an adjusting bolt 9 is inserted and installed inside the adjusting socket 8, and the front end of the adjusting bolt 9 passes through the adjusting socket 8 and enters into the interior of the mounting plate 1.

[0020] The rear wall of the movable pressure plate 11 is provided with an access groove 14 for adjusting the front end pressure of the bolt 9. The end of the movable pressure plate 11 is a semicircular structure and is provided with a fitting slide hole 13 inside. The movable pressure plate 11 is fitted onto the outside of the mounting bolt 5 through the fitting slide hole 13. After the movable pressure plate 11 is fitted, the end of the movable pressure plate 11 is stuck into the inside of the limit cavity 3, and the vertical movement of the entire movable pressure plate 11 will be restricted.

[0021] The outer surface of the protective plate 7 is provided with trapezoidal protrusions arranged at equal intervals, and a rubber layer is installed on the rear half of the outer surface of the protective plate 7. When the two protective plates 7 are close to each other to clamp the test piece, the surface of the test piece is squeezed by the protrusions on the surface of the protective plate 7 and continues to extend. The rubber layer on the surface of the protective plate 7 adheres to the surface of the test piece to increase friction. After fixation, the friction force with the surface of the test piece will increase, reducing the test piece from escaping from the clamp.

[0022] A card slot 6 is also provided on one side wall of the mounting plate 1 corresponding to the movable pressure plate 11. The inner bottom surfaces of the two card slots 6 are provided with equidistantly arranged alignment holes 12. The alignment holes 12 are provided with threads. The surface of the protrusions arranged on the surface of the protective plate 7 is provided with equidistantly arranged locking holes 10. The internal size of the locking holes 10 matches the inner diameter of the alignment holes 12. After the protective plate 7 is inserted into the interior of the card slot 6, it is locked by bolts passing through the alignment holes 12 and docked to the interior of the locking holes 10.

[0023] The working principle of this utility model:

[0024] By providing a mobile pressure plate 11 with stable force, after the end of the mobile pressure plate 11 is inserted into the interior of the limit cavity 3, the mounting bolt 5 is inserted and installed between the two positioning holes 4, and the mobile pressure plate 11 is mounted on the outside of the mounting bolt 5 through the set sliding hole 13 at the end. After the mobile pressure plate 11 is installed, no vertical displacement will occur during movement. The adjusting bolt 9 is inserted into the adjusting socket 8 and rotated deep into the access groove 14 provided on the surface of the mobile pressure plate 11 for docking. The adjusting bolt 9 acts on the middle section of the mobile pressure plate 11 so that when the mobile pressure plate 11 is pushed to move, the entire section of the mobile pressure plate 11 is evenly stressed. When clamping an object, the internal size of the opening part of the mounting plate 1 is controlled by rotating the adjusting bolt 9, which is very convenient to use.

[0025] By providing a protective plate 7 that is easy to disassemble and assemble, after the protective plate 7 is inserted into the interior of the card slot 6, a bolt is inserted from the alignment socket 12 opened on the outer surface of the mounting plate 1, and it is connected to the locking socket 10 opened inside the protective plate 7 and then rotated and locked. The protective plate 7 is locked in the corresponding card slot 6 by multiple bolts. Since the surface of the protective plate 7 is a segmented design, the surface of the front section of the side of the protective plate 7 is a trapezoidal block protruding structure with a groove, and the surface of the rear section of the side of the protective plate 7 is installed with a rubber layer, and the protruding length of the rubber layer is greater than the protruding length of the front end protrusion. When clamping, after the two protective plates 7 are close to each other, the object first contacts the convex part on the surface of the protective plates 7. After the object continues to penetrate into the interior of the mounting plate 1, the rubber layer on the rear section of the side of the protective plates 7 will contact the surface of the object. Continuously rotating the adjusting bolt 9 drives the moving pressing plate 11 to bring the two protective plates 7 closer to each other to increase the friction between the rubber layer and the surface of the object, making it more difficult for the object to slide during testing. It is also more convenient to remove the protective plates 7 when they are worn, and the integrity of the surface of the protective plates 7 can be maintained to avoid reducing the friction, thereby greatly improving the clamping performance of the device.

[0026] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A tensile testing machine fixture for preventing a test piece from slipping, comprising a mounting plate (1), the rear side wall of the mounting plate (1) protruding outward and having a mounting socket (2) for connection provided inside, the front end of the mounting plate (1) being a hollow structure, characterized in that: A limit cavity (3) is provided on the inner wall surface of the mounting plate (1), a movable pressure plate (11) is inserted and installed inside the limit cavity (3), positioning holes (4) are provided on the left and right sides of the inner wall surface of the limit cavity (3), the positioning holes (4) are connected to the outside of the mounting plate (1) and the inner wall surface is provided with threads, a mounting bolt (5) is inserted and fixed between the two positioning holes (4), a card slot (6) is provided on the left and right side walls of the front end of the mounting plate (1), a protective plate (7) is inserted and installed inside the two card slots (6), the front end of the mounting plate (1) extends to half the length of the left side on the right side, an adjustment socket (8) is provided inside the right front end of the mounting plate (1), an adjustment bolt (9) is inserted and installed inside the adjustment socket (8), and the front end of the adjustment bolt (9) passes through the adjustment socket (8) and enters the interior of the mounting plate (1).

2. A tensile testing machine fixture for preventing a test piece from slipping according to claim 1, characterized in that: The rear wall surface of the movable pressure plate (11) is provided with an access groove (14) for adjusting the front end pressure of the bolt (9); the end of the movable pressure plate (11) is a semicircular structure and has a sleeve sliding hole (13) inside; the movable pressure plate (11) is sleeved on the outside of the mounting bolt (5) through the sleeve sliding hole (13).

3. A tensile testing machine fixture for preventing a test piece from slipping according to claim 1, characterized in that: The outer surface of the protective plate (7) is provided with trapezoidal protrusions arranged at equal intervals, and a rubber layer is installed on the rear half of the outer surface of the protective plate (7).

4. A tensile testing machine fixture for preventing a test piece from slipping according to claim 1, characterized in that: A side wall surface inside the mounting plate (1) corresponding to the movable pressing plate (11) is also provided with a card slot (6), and the inner bottom surfaces of the two card slots (6) are provided with equidistantly arranged alignment holes (12), and the alignment holes (12) are provided with threads inside.

5. The tensile testing machine fixture for preventing a test piece from slipping according to claim 1, characterized in that: The surface of the protrusion arranged on the surface of the protective plate (7) is provided with equidistantly arranged locking holes (10), the inner size of the locking holes (10) matches the inner diameter of the alignment holes (12), and after the protective plate (7) is inserted into the interior of the card slot (6), bolts are passed through the alignment holes (12) and docked to the interior of the locking holes (10) for locking.

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