Clamping fixture for universal material testing machine

Abstract

The utility model discloses a clamping fixture for a universal material testing machine, which comprises a lower fixture assembly, the lower fixture assembly comprises a first motor supporting block, the lower part of the first motor supporting block is fixedly connected with a first motor box, a first motor is arranged in the first motor box, and a second motor is arranged in the first motor box. The upper end of an output shaft of the first motor is fixedly connected with a first sleeve, the interior of the first sleeve is connected with a first movable screw through a bolt, the end of the first movable screw is fixedly connected with a smooth circular plate, and the upper portion of a first motor supporting block is fixedly connected with a second supporting block. Through accurate control of the first motor, accurate clamping and releasing of a sample are achieved, the testing accuracy is improved, the clamping force can be adjusted according to the characteristics of different materials, and the application range of equipment is widened. And through the design of the guide groove and the guide block, the stability and repeatability of the whole clamp system are ensured, and the test error is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of clamping fixtures, in particular to a clamping fixture for a universal material testing machine. Background Art

[0002] As an important mechanical properties testing equipment, the universal material testing machine plays an indispensable role in the field of materials science and engineering. With the increasing requirements of modern industry for material performance, higher standards are also being put forward for the functionality and precision of the testing machine fixtures. Traditional universal material testing machine fixtures mostly use manual or semi-automatic methods to clamp the specimens. Although this method has a simple structure, it often has certain limitations during operation, such as inaccurate clamping force control and poor clamping stability. In recent years, with the development of precision manufacturing technology and automation technology, many new clamping devices have emerged. By introducing advanced technologies such as servo motors, sensors and intelligent control systems, they have significantly improved the working efficiency and reliability of the fixtures.

[0003] Despite this, some existing clamping devices still have some pressing issues to address. For example, some fixtures have a limited clamping force adjustment range, making them difficult to adapt to specimens of varying sizes and materials. This leads to unstable clamping and affects the accuracy of test results. Furthermore, to ensure safety and repeatability during testing, fixture design should also consider how to reduce clamping complexity and facilitate operation. Therefore, we propose a clamping fixture for universal materials testing machines. Utility Model Content

[0004] In response to the problems existing in the prior art, the purpose of the utility model is to provide a clamping fixture for a universal material testing machine. By providing an upper clamp assembly and a lower clamp assembly, it is convenient to clamp both ends of the material. The internal motor drives the screw to rotate, so that clamping can be convenient and quick. The clamping effect is good and it is not easy to fall off.

[0005] The utility model is implemented as follows: a clamping fixture for a universal material testing machine includes a lower clamp assembly, the lower clamp assembly includes a first motor support block, the lower part of the first motor support block is fixedly connected to the first motor box, the first motor is installed inside the first motor box, the upper end of the output shaft of the first motor is fixedly connected to the first sleeve, the interior of the first sleeve is connected to the first movable screw by bolts, the end of the first movable screw is fixedly connected to a smooth circular plate, the upper part of the first motor support block is fixedly connected to the second support block, two first clamping blocks are provided inside the second support block, the first clamping block is provided with a groove for placing the smooth circular plate, the first clamping block is provided with a guide groove, and the interior of the second support block is fixedly connected to a guide block.

[0006] Optionally, the lower clamp assembly includes a threaded sleeve, which is threadedly connected to a conveying screw of the material testing machine.

[0007] Optionally, a plurality of baffles are fixedly connected to the inner wall of the second supporting block, the first clamping block is arranged between the front and rear baffles, and screw holes are provided on the baffles.

[0008] Optionally, a semicircular notch is provided on the upper portion of the first motor support block, and a rectangular block is fixedly connected to the first sleeve.

[0009] Optionally, a silicone shock-absorbing plate is fixedly connected to the lower portion of the first motor box, and a protective sleeve is fixedly connected to the outer side of the threaded sleeve.

[0010] Optionally, a driving motor for driving the conveying screw to rotate is fixedly connected to the interior of the material testing machine, and a support platform is fixedly connected to the upper part of the material testing machine.

[0011] Optionally, a bottom plate is fixedly connected to the lower portion of the material testing machine, and a remote control bracket is fixedly connected to the right side of the material testing machine.

[0012] Optionally, the upper part of the conveying screw is connected to an upper clamp assembly through a bearing, and the upper clamp assembly includes a first mounting block and a second mounting block, two second clamping plates are provided inside the second mounting block, and cylindrical connecting blocks are fixedly connected to the first mounting block and the second mounting block.

[0013] Optionally, a second motor is fixedly connected to the upper portion of the first mounting block, and a second sleeve is fixedly connected to the output shaft of the second motor.

[0014] Optionally, the second sleeve is connected to a second screw rod via a bolt, and the end of the second screw rod is fixedly connected to a second circular plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. Precise control of the first motor enables precise clamping and release of the sample, improving test accuracy. The coordination of the first movable screw and the first clamping block allows the clamping force to be adjusted according to the characteristics of different materials, expanding the device's applicability. The design of the guide slot and guide block ensures the stability and repeatability of the entire fixture system, reducing test errors.

[0017] 2. The threaded sleeve and the conveying screw cooperate to achieve an effective connection between the fixture and the material testing machine, facilitating the installation and removal of the fixture and improving work efficiency. By rotating the conveying screw, different types of loads such as tension or compression can be applied to the sample, enhancing the functional versatility of the testing machine.

[0018] 3. The baffle design increases the stability of the fixture, preventing deviation caused by external forces during the clamping process, and ensuring the accuracy of the test results. The screw holes in the baffle facilitate the adjustment of the position of the first clamp to accommodate samples of different sizes and improve the flexibility of the equipment.

[0019] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram provided by the utility model;

[0021] Figure 2 It is a schematic diagram of the lower clamp assembly provided by the utility model;

[0022] Figure 3 This is an exploded schematic diagram of the lower clamp assembly provided by the present invention;

[0023] Figure 4 It is a plan view of the lower clamp assembly provided by the utility model;

[0024] Figure 5 It is a three-dimensional schematic diagram of the upper clamp assembly provided by the utility model;

[0025] Figure 6 It is a plan view of the upper clamp assembly provided by the utility model.

[0026] In the figure: 1. material testing machine; 2. base plate; 3. remote control bracket; 4. support platform; 5. conveying screw; 6. lower clamp assembly; 61. threaded sleeve; 62. protective cover; 63. first motor support block; 64. second support block; 65. first motor box; 66. silicone shock-absorbing plate; 67. baffle; 68. first clamp block; 69. guide groove; 610. groove; 611. guide block; 612. smooth circular plate; 613. first movable screw; 614. first sleeve; 615. first motor; 7. bearing; 8. upper clamp assembly; 81. second clamp plate; 82. second motor; 83. first mounting block; 84. cylindrical connecting block; 85. second mounting block; 86. second sleeve; 87. second screw. DETAILED DESCRIPTION

[0027] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0028] like Figures 1 to 6 As shown, an embodiment of the present invention provides a clamping fixture for a universal material testing machine.

[0029] It includes a lower clamp assembly 6, which includes a first motor support block 63. The lower part of the first motor support block 63 is fixedly connected to the first motor box 65. The first motor 615 is installed inside the first motor box 65. The upper end of the output shaft of the first motor 615 is fixedly connected to the first sleeve 614. The interior of the first sleeve 614 is connected to the first movable screw 613 by bolts. The end of the first movable screw 613 is fixedly connected to the smooth circular plate 612. The upper part of the first motor support block 63 is fixedly connected to the second support block 64. Two first clamping blocks 68 are provided inside the second support block 64. The first clamping block 68 is provided with a groove 610 for placing the smooth circular plate 612. The first clamping block 68 is provided with a guide groove 69. The interior of the second support block 64 is fixedly connected with a guide block 611.

[0030] The lower clamp assembly 6 includes a threaded sleeve 61 , which is connected to the conveying screw 5 of the material testing machine 1 through threads.

[0031] A plurality of baffles 67 are fixedly connected to the inner wall of the second support block 64 . The first clamping block 68 is disposed between the front and rear baffles 67 . Screw holes are formed on the baffles 67 .

[0032] A semicircular notch is formed on the upper portion of the first motor support block 63 , and a rectangular block is fixedly connected to the first sleeve 614 .

[0033] A silica gel shock-absorbing plate 66 is fixedly connected to the lower portion of the first motor box 65 , and a protective sleeve 62 is fixedly connected to the outer side of the threaded sleeve 61 .

[0034] A driving motor for driving the conveying screw 5 to rotate is fixedly connected to the interior of the material testing machine 1 , and a supporting platform 4 is fixedly connected to the upper portion of the material testing machine 1 .

[0035] A bottom plate 2 is fixedly connected to the lower portion of the material testing machine 1 , and a remote control bracket 3 is fixedly connected to the right side of the material testing machine 1 .

[0036] The upper part of the conveying screw 5 is connected to the upper clamp assembly 8 through the bearing 7. The upper clamp assembly 8 includes a first mounting block 83 and a second mounting block 85. Two second clamping plates 81 are provided inside the second mounting block 85. A cylindrical connecting block 84 is fixedly connected to the first mounting block 83 and the second mounting block 85.

[0037] The second motor 82 is fixedly connected to the upper portion of the first mounting block 83 , and the output shaft of the second motor 82 is fixedly connected to the second sleeve 86 .

[0038] The second sleeve 86 is connected to the second screw rod 87 via bolts, and the end of the second screw rod 87 is fixedly connected to the second circular plate.

[0039] Working Principle: When in use, the material to be clamped is placed between the two first clamping blocks 68. The first motor 615 can drive the first sleeve 614 to rotate, and then drive the first movable screw 613 to extend and retract. The first movable screw 613 drives the smooth circular plate 612 to move, thereby driving the first clamping block 68 to rise or fall. The inner groove of the second support block 64 is set as a trapezoidal groove with one end larger and the other end smaller. Therefore, when the two second support blocks 64 move, they can move closer to each other to clamp the material or move away from each other to release the material.

[0040] The structures of the upper clamp assembly 8 and the lower clamp assembly 6 are basically the same, except that a bearing 7 is installed on the cylindrical connecting block 84 of the upper clamp assembly 8, so that it cannot be driven up and down by the conveying screw 5.

[0041] When in use, the conveying screw 5 can drive the lower clamp assembly 6 to move, thereby performing a tensile test on the material.

[0042] By providing the first motor 615 and its transmission system, precise control of the smooth circular plate 612 is achieved, thereby achieving automatic clamping and releasing of the sample.

[0043] Compared with traditional manual or semi-automatic clamps, the present invention utilizes the first motor 615 to achieve automated control, thereby improving the accuracy and efficiency of the clamping process.

[0044] The first motor 615 drives the smooth circular plate 612 to move through the first sleeve 614 and the first movable screw 613, and can accurately adjust the clamping force as needed, thereby ensuring the stability of the sample and the accuracy of the test results.

[0045] The output shaft of the first motor 615 is fixedly connected to the first sleeve 614 , and the first movable screw 613 connected by thread ensures stability during the transmission process, thereby improving the reliability and test accuracy of the fixture.

[0046] By providing the guide groove 69 on the first clamping block 68 and providing the guide block 611 inside the second supporting block 64 , the linear motion of the smooth circular plate 612 is ensured, thereby improving the stability of the clamping process.

[0047] The invention solves the problem in the prior art that the clamp is prone to deflection or shaking during the clamping process.

[0048] By arranging a plurality of baffles 67 on the inner wall of the second support block 64 and providing screw holes on the baffles 67 , the position of the first clamping block 68 can be fixed by bolts when the pressure is relatively high, so as to adapt to tests with different pressures.

[0049] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A clamping fixture for a universal material testing machine, comprising a lower clamp assembly (6), characterized in that: The lower clamp assembly (6) includes a first motor support block (63), the lower part of the first motor support block (63) is fixedly connected to a first motor box (65), the interior of the first motor box (65) is equipped with a first motor (615), the upper end of the output shaft of the first motor (615) is fixedly connected to a first sleeve (614), the interior of the first sleeve (614) is connected to a first movable screw (613) by bolts, the end of the first movable screw (613) is fixedly connected to a smooth circular plate (612), the upper part of the first motor support block (63) is fixedly connected to a second support block (64), the interior of the second support block (64) is provided with two first clamping blocks (68), the first clamping block (68) is provided with a groove (610) for placing the smooth circular plate (612), the first clamping block (68) is provided with a guide groove (69), and the interior of the second support block (64) is fixedly connected to a guide block (611).

2. The clamping fixture for a universal material testing machine according to claim 1, characterized in that: The lower clamp assembly (6) comprises a threaded sleeve (61), and the threaded sleeve (61) is connected to the conveying screw (5) of the material testing machine (1) through a threaded connection.

3. The clamping fixture for a universal material testing machine according to claim 1, characterized in that: The inner wall of the second support block (64) is fixedly connected with a plurality of baffles (67), the first clamping block (68) is arranged between the front and rear baffles (67), and screw holes are provided on the baffles (67).

4. The clamping fixture for a universal material testing machine according to claim 1, characterized in that: A semicircular notch is provided on the upper portion of the first motor support block (63), and a rectangular block is fixedly connected to the first sleeve (614).

5. The clamping fixture for a universal material testing machine according to claim 2, characterized in that: A silica gel shock-absorbing plate (66) is fixedly connected to the lower portion of the first motor box (65), and a protective sleeve (62) is fixedly connected to the outer side of the threaded sleeve (61).

6. The clamping fixture for a universal material testing machine according to claim 2, characterized in that: A driving motor for driving a conveying screw (5) to rotate is fixedly connected to the interior of the material testing machine (1), and a supporting platform (4) is fixedly connected to the upper part of the material testing machine (1).

7. The clamping fixture for a universal material testing machine according to claim 6, characterized in that: The lower part of the material testing machine (1) is fixedly connected to a bottom plate (2), and the right side of the material testing machine (1) is fixedly connected to a remote control bracket (3).

8. The clamping fixture for a universal material testing machine according to claim 2, characterized in that: The upper part of the conveying screw (5) is connected to an upper clamp assembly (8) through a bearing (7), and the upper clamp assembly (8) includes a first mounting block (83) and a second mounting block (85), two second clamping plates (81) are provided inside the second mounting block (85), and a cylindrical connecting block (84) is fixedly connected to the first mounting block (83) and the second mounting block (85).

9. The clamping fixture for a universal material testing machine according to claim 8, characterized in that: The upper portion of the first mounting block (83) is fixedly connected to a second motor (82), and the output shaft of the second motor (82) is fixedly connected to a second sleeve (86).

10. The clamping fixture for a universal material testing machine according to claim 9, characterized in that: The second sleeve (86) is connected to a second screw rod (87) via a bolt, and the end of the second screw rod (87) is fixedly connected to a second circular plate.

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