Pneumatic clamp applied to universal testing machine

Abstract

The utility model discloses a pneumatic clamp applied to a universal testing machine, which relates to the technical field of pneumatic clamps and comprises a pneumatic control component, a pneumatic clamping component and a pneumatic clamping component, the input end of the clamp air cylinder is connected with a branch port of the pneumatic control component, and the output end of the clamp air cylinder can stretch out and draw back under the control of the pneumatic control component; the clamping part comprises a movable clamping piece, a driven clamping piece and a connecting part which are stacked in sequence, a sliding rod penetrates through the movable clamping piece, the driven clamping piece and the connecting part, one end of the sliding rod is connected with the outer wall of the clamp air cylinder, and the other end of the sliding rod extends out of the connecting part and is fixed through a nut; the end, away from the driven clamping piece, of the movable clamping piece is connected with the output end of the clamp air cylinder. A clamping action part is arranged between the movable clamping piece and the driven clamping piece. A test sample with a larger width can be clamped, so that the test sample is not easy to break and incomplete; and meanwhile, the clamping force can be regulated and controlled by controlling the air pressure.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic clamp technology, and more specifically, it relates to a pneumatic clamp for use in a universal testing machine. Background Technology

[0002] In modern industrial production, universal testing machines are important quality inspection equipment, and their performance stability plays a crucial role in ensuring product quality. In testing activities, test fixtures are essential devices for accurately measuring the performance of test specimens. Traditional fixtures are mostly made of metal to ensure durability, but for clamping devices of lightweight and thin materials, such as fiberglass mesh,…

[0003] Currently, many shortcomings of traditional clamps have been found in the testing of fiberglass mesh, such as: sample breakage often occurs at the clamping point, defects in the clamping structure design lead to different degrees of damage to the clamp by different people, and the effect of clamping force on the sample is only roughly estimated in traditional test clamps, which are often replaced by general-purpose clamps, etc. Utility Model Content

[0004] The purpose of this invention is to provide a pneumatic clamp for use in a universal testing machine, so as to solve the problems existing in the background art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] This application provides a pneumatic clamp for use in a universal testing machine, comprising:

[0007] Pneumatic control components connect to an external air source and control the air intake and exhaust.

[0008] The clamping cylinder has its input end connected to the branch port of the pneumatic control component, and its output end can extend and retract under the control of the pneumatic control component.

[0009] The clamping component includes a movable clamping piece, a passive clamping piece, and a connecting part stacked sequentially. The movable clamping piece, the passive clamping piece, and the connecting part are connected by a sliding rod. One end of the sliding rod is connected to the outer wall of the clamping cylinder, and the other end of the sliding rod extends out of the connecting part and is fixed by a nut. The end of the movable clamping piece facing away from the passive clamping piece is connected to the output end of the clamping cylinder. The movable clamping piece and the passive clamping piece are clamped together. The connecting part is connected to the testing machine through a connector.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, the aforementioned pneumatic control components include:

[0012] Gas supply pipe, connecting to an external gas source;

[0013] The on / off switch has a main air supply port connected to the air supply pipe and controls the on / off state of the air supply pipe; the branch port of the on / off switch is connected to the input end of the clamp cylinder through an air pipe branch.

[0014] Furthermore, the number of ports in the above-mentioned branch ports is 2, and the input end of the clamp cylinder includes an air inlet and an air outlet.

[0015] Furthermore, a fixed block connected to the clamping cylinder is provided between the output end of the clamping cylinder and the movable clamping plate, and one end of the sliding rod is connected to the fixed block.

[0016] Furthermore, a fixed clamping plate connected to the fixed block is provided between the fixed block and the movable clamping plate, and the output ends of the sliding rod and the clamping cylinder both pass through the fixed clamping plate.

[0017] Furthermore, the aforementioned clamping mechanism is also provided with a first clamping boss and a second clamping boss that are respectively connected to the movable clamping piece and the passive clamping piece, and the first clamping boss and the second clamping boss are used in conjunction.

[0018] Furthermore, the mating end faces of the first clamping boss and the second clamping boss are respectively provided with anti-slip textures.

[0019] Furthermore, the number of the aforementioned sliding rods is two, with the two sliding rods symmetrically arranged on both sides of the clamping component, and the two sliding rods being parallel to each other.

[0020] Furthermore, the aforementioned connecting portion has a connecting hole through which it is movably connected to the connecting member.

[0021] Furthermore, a return spring that is sleeved with the sliding rod is provided between the aforementioned movable clamping piece and the passive clamping piece, and the return spring is compressed when the first clamping boss and the second clamping boss abut against each other.

[0022] Compared with the prior art, the present invention has at least the following beneficial effects:

[0023] In this application, two pneumatic clamps are required for actual use, and the two pneumatic clamps are connected to the two working ends of the testing machine through connecting parts. When it is necessary to clamp the specimen, firstly, the pneumatic control component connects the clamp cylinders of the two pneumatic clamps to the air source, so that gas enters the two clamp cylinders and the cylinder pistons of the clamp cylinders extend, that is, the output ends of the clamp cylinders extend. Secondly, the output ends of the two clamp cylinders control the movable clamping plate to move to one side of the passive clamping plate, so that the two ends of the specimen are respectively clamped in the clamping working parts of the two clamping components, so that the tensile test is performed on the specimen by the testing machine. Finally, after the test is completed, the pneumatic control component de-inflates the clamp cylinders and retracts their output ends.

[0024] In this application, the clamping action formed between the movable clamping piece and the passive clamping piece is used to clamp the sample, which enables the clamping of a wider sample and makes it less prone to breakage or damage; at the same time, the movable clamping piece is moved by a cylinder to achieve clamping, and the clamping force can be adjusted by controlling the air pressure. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a schematic diagram of the overall structure of the pneumatic clamp in the embodiment of this utility model;

[0027] Figure 2 This is a schematic diagram of the clamping component in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the pneumatic clamp in use in an embodiment of this utility model.

[0029] The attached diagram shows the markings and corresponding component names:

[0030] 1. Clamp cylinder; 2. Movable clamping plate; 3. Passive clamping plate; 4. Connecting part; 5. Sliding rod; 6. Connecting piece; 7. Air source pipe; 8. On / off switch; 9. Air pipe branch; 10. Fixing block; 11. Fixing clamping plate; 12. First clamping boss; 13. Second clamping boss; 14. Connecting hole; 15. Sample. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of the embodiments of this utility model, "a plurality of" means at least two.

[0037] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] Example: This example provides a pneumatic clamp for use in a universal testing machine. The pneumatic clamp includes:

[0039] Pneumatic control components connect to an external air source and control the air intake and exhaust.

[0040] Among them, the pneumatic control component is used to connect to an external air source to control the extension and retraction of the output end of the pneumatic clamp; such as Figure 3 As shown, specifically, the above-mentioned pneumatic control components include:

[0041] Gas supply pipe 7 connects to an external gas source;

[0042] The main air supply port of the switch 8 is connected to the air supply pipe 7 and controls the opening and closing of the air supply pipe 7; the branch port of the switch 8 is connected to the input end of the clamp cylinder 1 through the air pipe branch 9.

[0043] The pneumatic clamp also includes a clamp cylinder 1, the input end of which is connected to the branch port of the pneumatic control component, and the output end of the clamp cylinder 1 can extend and retract under the control of the pneumatic control component.

[0044] Optionally, the number of ports in the above branch ports is 2, and the input end of the clamp cylinder 1 includes an air inlet and an air outlet.

[0045] The pneumatic clamp also includes: a clamping component, which includes a movable clamping piece 2, a passive clamping piece 3, and a connecting part 4 stacked in sequence. The movable clamping piece 2, the passive clamping piece 3, and the connecting part 4 are connected by a sliding rod 5. One end of the sliding rod 5 is connected to the outer wall of the clamping cylinder 1, and the other end of the sliding rod 5 extends out of the connecting part 4 and is fixed by a nut. The end of the movable clamping piece 2 facing away from the passive clamping piece 3 is connected to the output end of the clamping cylinder 1. The movable clamping piece 2 and the passive clamping piece 3 are clamping action parts. The connecting part 4 is connected to the testing machine through a connector 6.

[0046] The movable clamp 2, the passive clamp 3, and the connecting part 4 can be made of metal, such as aluminum or iron. The movable clamp 2 and the passive clamp 3 can have a cuboid shape, such as... Figure 1 , Figure 2 , Figure 3 As shown, during use, the movable clip 2, the passive clip 3, and the connecting part 4 need to be parallel to each other.

[0047] Specifically, the structure of the connecting part 4 can also be cuboid, such as... Figure 2 As shown, the lower part of the connecting part 4 is a plate structure similar to the movable clamping piece 2 and the passive clamping piece 3, and the upper part extends to form a structure with a cross-section similar to "7". The connecting piece 6 connects to the upper part of the connecting part 4. A schematic diagram of the pneumatic clamp's use can be found in [reference needed]. Figure 3 The clamping parts of the two pneumatic clamps are arranged facing each other in the vertical direction, and the two pneumatic clamps respectively clamp both ends of the sample 15. Figure 3 The end of the connecting part 4 of the upper pneumatic clamp is connected to the sample 15 machine via the connector 6. Figure 3 The end of the connecting part 4 of the pneumatic clamp in the middle and lower part is also connected to the test specimen 15 machine through the connecting part 6. The working end of the test machine connected to the upper pneumatic clamp moves upward and the working end of the test machine connected to the lower pneumatic clamp moves downward, so that the test specimen 15 is subjected to tensile test by the test machine.

[0048] Optionally, a fixing block 10 connected to the clamping cylinder 1 is provided between the output end of the clamping cylinder 1 and the movable clamping plate 2, and one end of the sliding rod 5 is connected to the fixing block 10.

[0049] Optionally, a fixed clamping piece 11 connected to the fixed block 10 is also provided between the fixed block 10 and the movable clamping piece 2, and the output ends of the sliding rod 5 and the clamping cylinder 1 both pass through the fixed clamping piece 11.

[0050] The clamping part is further provided with a first clamping boss 12 and a second clamping boss 13, which are respectively connected to the movable clamping piece 2 and the passive clamping piece 3, and the first clamping boss 12 and the second clamping boss 13 are used in cooperation; the mating end faces of the first clamping boss 12 and the second clamping boss 13 are respectively provided with anti-slip texture.

[0051] Optionally, a return spring is provided between the movable clamping piece 2 and the passive clamping piece 3, which is sleeved with the sliding rod 5, and the return spring is compressed when the first clamping boss 12 and the second clamping boss 13 abut against each other.

[0052] Optionally, the number of sliding rods 5 is 2, and the two sliding rods 5 are symmetrically arranged on both sides of the clamping component, and the two sliding rods 5 are parallel to each other.

[0053] Specifically, the structures of the first clamping boss 12 and the second clamping boss 13 are as follows: Figure 2 As shown, when the first clamping boss 12 and the second clamping boss 13 are provided, it is preferable to distribute the two sliding rods 5 on both sides, which can be symmetrically arranged, and the two sliding rods 5 need to be parallel to each other; of course, the two sliding rods 5 have the same size, so as to ensure that the movable clamping piece 2 can move along the axial direction of the sliding rod 5.

[0054] The inclusion of the first clamping boss 12 and the second clamping boss 13 also facilitates the installation of the return spring, such as... Figure 2 As shown, when the first clamping boss 12 and the second clamping boss 13 abut against each other, the return spring is compressed, and since the first clamping boss 12 and the second clamping boss 13 have a certain thickness, the compression of the return spring will not cause it to be damaged.

[0055] Optionally, the connecting part 4 has a connecting hole 14 that is movably connected to the connecting member 6. A schematic diagram of the connecting hole 14 is shown below. Figure 3 As shown.

[0056] In actual use, two pneumatic clamps are required, and the two pneumatic clamps are connected to the two working ends of the testing machine through connector 6. When it is necessary to clamp the specimen 15, firstly, the pneumatic control component connects the clamp cylinder 1 of the two pneumatic clamps to the air source, so that the gas enters the two clamp cylinders 1 and the cylinder piston of clamp cylinder 1 extends, that is, the output end of clamp cylinder 1 extends. Secondly, the output end of the two clamp cylinders 1 controls the movable clamp 2 to move to one side of the passive clamp 3, so that the two ends of the specimen 15 are respectively clamped in the clamping working parts of the two clamping components, so that the tensile test is performed on the specimen 15 by the testing machine. Finally, after the test is completed, the pneumatic control component de-inflates the clamp cylinder 1 and retracts its output end.

[0057] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A pneumatic clamp for use in a universal testing machine, characterized in that, include: Pneumatic control components connect to an external air source and control the air intake and exhaust. A clamping cylinder, wherein the input end of the clamping cylinder is connected to the branch port of the pneumatic control component, and the output end of the clamping cylinder can extend and retract under the control of the pneumatic control component; The clamping component includes a movable clamping piece, a passive clamping piece, and a connecting part stacked sequentially. The movable clamping piece, the passive clamping piece, and the connecting part are connected by a sliding rod. One end of the sliding rod is connected to the outer wall of the clamping cylinder, and the other end of the sliding rod extends out of the connecting part and is fixed by a nut. The end of the movable clamping piece facing away from the passive clamping piece is connected to the output end of the clamping cylinder. The movable clamping piece and the passive clamping piece have a clamping action. The connecting part is connected to the testing machine via a connector.

2. The pneumatic clamp for a universal testing machine according to claim 1, characterized in that, The pneumatic control component includes: Gas supply pipe, connecting to an external gas source; An on / off switch is provided, with its main air supply port connected to the air supply pipe and controlling the on / off state of the air supply pipe; the branch port of the on / off switch is connected to the input end of the clamp cylinder via an air pipe branch.

3. A pneumatic clamp for a universal testing machine according to claim 2, characterized in that, The number of ports in the branch port is 2, and the input end of the clamp cylinder includes an air inlet and an air outlet.

4. A pneumatic clamp for a universal testing machine according to claim 1, characterized in that, A fixed block connected to the clamp cylinder is provided between the output end of the clamp cylinder and the movable clamping plate, and one end of the sliding rod is connected to the fixed block.

5. A pneumatic clamp for a universal testing machine according to claim 4, characterized in that, A fixed clamping piece connected to the fixed block is also provided between the fixed block and the movable clamping piece, and the output ends of the sliding rod and the clamping cylinder both pass through the fixed clamping piece.

6. A pneumatic clamp for a universal testing machine according to claim 1, characterized in that, The clamping mechanism is further provided with a first clamping boss and a second clamping boss that are respectively connected to the movable clamping piece and the passive clamping piece, and the first clamping boss and the second clamping boss are used in conjunction.

7. A pneumatic clamp for a universal testing machine according to claim 6, characterized in that, The mating end faces of the first clamping boss and the second clamping boss are respectively provided with anti-slip textures.

8. A pneumatic clamp for a universal testing machine according to claim 7, characterized in that, The number of sliding rods is 2, and the two sliding rods are symmetrically arranged on both sides of the clamping component, and the two sliding rods are parallel to each other.

9. A pneumatic clamp for a universal testing machine according to claim 1, characterized in that, The connecting part has a connecting hole through which it can be movably connected with the connecting member.

10. A pneumatic clamp for a universal testing machine according to claim 8, characterized in that, A return spring is provided between the movable clamping piece and the passive clamping piece, which is sleeved with the sliding rod, and the return spring is compressed when the first clamping boss and the second clamping boss abut against each other.

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