Pneumatic clamp for tensile detection of sample piece

Abstract

The utility model discloses a pneumatic clamp for tensile detection of a sample piece, and belongs to the field of pneumatic clamps. A pneumatic clamp for tensile detection of a sample piece comprises an upper clamp and a lower clamp, the upper clamp comprises a base plate, the bottom of the base plate is fixedly connected with a piston bin, the inner wall of the piston bin is slidably connected with a piston plate, and the bottom of the piston plate is fixedly connected with a vertical push rod; the bottom of the piston bin is fixedly connected with a clamping bin, the bottom of the vertical push rod penetrates into the clamping bin and is fixedly connected with a transverse plate, the two sides of the transverse plate are rotationally connected with first hinge plates, and the sides, away from the transverse plate, of the first hinge plates are rotationally connected with second hinge plates. Through the arrangement of the transverse plate, the first hinge plate and the second hinge plate, a labor-saving lever is formed, so that the force applied to the transverse plate is amplified at the end part of the transverse push rod, the clamping effect of the transverse push rod is improved, the clamping stability of a sample piece is greatly improved, and the accuracy of a test result is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic clamps, in particular to a pneumatic clamp for tensile testing of a sample piece. Background Art

[0002] Tensile testing is a method of testing a material's ability to resist tensile forces. This test can be used to evaluate the strength and ductility of a material and determine the performance and behavior of a material under tensile conditions. By measuring the relationship between the loading force and the deformation of the sample, the material's tensile strength, yield strength, elongation and other indicators can be calculated. When performing tensile testing, a fixture is required to assist.

[0003] At present, when the existing clamps are clamping, the side wall of the sample will only obtain the clamping force as much as the force-applying mechanism releases. In order to ensure the clamping stability of the sample, the force-applying mechanism usually needs to release a greater force, which will increase the driving force and increase the energy loss. Therefore, a pneumatic clamp for tensile testing of sample is proposed. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that when the clamping stability needs to be improved, the force-applying mechanism can only release a larger force to achieve it, thereby increasing energy loss, and proposes a pneumatic clamp for tensile testing of a sample piece.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A pneumatic clamp for tensile testing of specimens, comprising an upper clamp and a lower clamp, the upper clamp also comprising a base plate, the bottom of the base plate is fixedly connected to a piston bin, the inner wall of the piston bin is slidably connected to a piston plate, the bottom of the piston plate is fixedly connected to a vertical push rod; the bottom of the piston bin is fixedly connected to a clamping bin, the bottom of the vertical push rod penetrates into the clamping bin and is fixedly connected to a transverse plate, both sides of the transverse plate are rotatably connected to a first hinge plate, the side of the first hinge plate away from the transverse plate is rotatably connected to a second hinge plate, both sides of the clamping bin are slidably connected to transverse push rods, the middle part of the second hinge plate is rotatably connected to the side wall of the clamping bin, the end of the second hinge plate away from the first hinge plate is hinged to the side wall of the transverse push rod, and the ends of the transverse push rods close to each other are fixedly connected to the clamping plate.

[0007] For the convenience of clamping, preferably, the side walls of the piston chamber are respectively fixedly connected with a first air intake pipe and a second air intake pipe, and the first air intake pipe and the second air intake pipe are respectively connected with the upper and lower cavities of the piston chamber.

[0008] Preferably, the communicating ends of the first air inlet pipe and the second air inlet pipe are respectively located on both sides of the piston plate.

[0009] In order to improve the sealing performance, preferably, a first sealing strip is fixedly connected between the connection between the base plate and the piston chamber.

[0010] Preferably, a second sealing strip is fixedly connected to the middle portion of the piston plate side wall.

[0011] Preferably, a third sealing strip is fixedly connected between the vertical push rod and the bottom of the piston chamber.

[0012] In order to facilitate the connection of an external pressure device, preferably, a connecting seat is fixedly connected to the top of the base plate, a connecting ear is connected to the top of the connecting seat, and a connecting hole is opened on the side wall of the connecting ear.

[0013] In order to facilitate installation and disassembly, preferably, the clamping plate and the transverse push rod are fixedly connected by bolts.

[0014] For easy identification, preferably, a labeling area is provided on the side wall of the piston chamber.

[0015] In order to realize the tensile test, preferably, the upper clamp and the lower clamp have the same structure, and are symmetrically arranged between the upper clamp and the lower clamp.

[0016] Compared with the prior art, the utility model provides a pneumatic clamp for tensile testing of sample pieces, which has the following beneficial effects:

[0017] The pneumatic clamp for tensile testing of the specimen forms a force-saving lever through the arrangement of a transverse plate, a first hinge plate and a second hinge plate, so that the force applied to the transverse plate is amplified at the end of the transverse push rod, thereby improving the clamping effect of the transverse push rod, greatly increasing the clamping stability of the specimen and ensuring the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a pneumatic clamp for tensile testing of a sample piece proposed by the utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure of a pneumatic clamp for tensile testing of a sample piece proposed by the utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of an upper clamp of a pneumatic clamp for tensile testing of a sample piece proposed by the utility model;

[0021] Figure 4 The utility model is a schematic diagram of the side section structure of the upper clamp of the pneumatic clamp for tensile testing of a specimen.

[0022] In the figure: 1. upper clamp; 2. lower clamp; 3. base plate; 4. piston chamber; 41. piston plate; 42. vertical push rod; 5. clamping chamber; 51. transverse plate; 52. first hinge plate; 53. second hinge plate; 6. transverse push rod; 61. clamping plate; 7. first air inlet pipe; 71. second air inlet pipe; 8. first sealing strip; 81. second sealing strip; 82. third sealing strip; 9. connecting seat; 91. connecting ear; 92. connecting hole. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0025] Example:

[0026] Reference Figure 1-Figure 4 A pneumatic clamp for tensile testing of a specimen, comprising an upper clamp 1 and a lower clamp 2, the upper clamp 1 and the lower clamp 2 having the same structure, and the upper clamp 1 and the lower clamp 2 are aligned and symmetrically arranged, the upper clamp 1 also comprises a base plate 3, the bottom of the base plate 3 is fixedly connected to a piston bin 4, the inner wall of the piston bin 4 is slidably connected to a piston plate 41, the bottom of the piston plate 41 is fixedly connected to a vertical push rod 42; the bottom of the piston bin 4 is fixedly connected to a clamping bin 5, the bottom of the vertical push rod 42 penetrates into the clamping bin 5 and is fixedly connected to a transverse plate 51, both sides of the transverse plate 51 are rotatably connected to a first hinge plate 52, the first hinge plate 52 is rotatably connected to a second hinge plate 53 on a side away from the transverse plate 51, and the two sides of the clamping bin 5 are fixedly connected to the first hinge plate 52. The sides are slidably connected with a transverse push rod 6, the middle part of the second hinge plate 53 is rotatably connected to the side wall of the clamping bin 5, the end of the second hinge plate 53 away from the first hinge plate 52 is hinged to the side wall of the transverse push rod 6, the end of the transverse push rod 6 close to each other is fixedly connected with a clamping plate 61, the clamping plate 61 and the transverse push rod 6 are fixedly connected by bolts, the side walls of the piston bin 4 are respectively fixedly connected with the first air intake pipe 7 and the second air intake pipe 71, the first air intake pipe 7 and the second air intake pipe 71 are respectively connected to the upper and lower cavities of the piston bin 4, the connecting ends of the first air intake pipe 7 and the second air intake pipe 71 are respectively located on both sides of the piston plate 41, and the first air intake pipe 7 and the second air intake pipe 71 are both connected to the existing air pump.

[0027] Through the arrangement of the above-mentioned structure, the first air inlet pipe 7 inflates the upper cavity of the piston chamber 4, and the piston plate 41 is squeezed under the action of air pressure, so that the piston plate 41 pushes the vertical push rod 42 downward, thereby squeezing the transverse plate 51, and then under the transmission action of the first hinge plate 52 and the second hinge plate 53, the second hinge plate 53 is finally rotated along the hinge point with the side wall of the clamping chamber 5, thereby simultaneously pushing the transverse push rods 6 on both sides closer to the middle. At this time, a force-saving lever is formed between the transverse plate 51, the first hinge plate 52 and the second hinge plate 53, so that the force applied to the transverse plate 51 is amplified at the end of the transverse push rod 6, thereby improving the clamping effect of the transverse push rod 6.

[0028] Reference Figure 3 , Figure 4 A first sealing strip 8 is fixedly connected between the connection between the base plate 3 and the piston chamber 4, thereby improving the sealing between the base plate 3 and the piston chamber 4; a second sealing strip 81 is fixedly connected to the middle of the side wall of the piston plate 41, thereby improving the sealing between the piston plate 41 and the piston chamber 4; a third sealing strip 82 is fixedly connected at the joint between the vertical push rod 42 and the bottom of the piston chamber 4, thereby improving the sealing between the vertical push rod 42 and the piston chamber 4.

[0029] A connecting seat 9 is fixedly connected to the top of the base plate 3 , a connecting ear 91 is connected to the top of the connecting seat 9 , a connecting hole 92 is opened on the side wall of the connecting ear 91 , and the connecting hole 92 is used to connect external force-applying mechanisms.

[0030] The side wall of the piston chamber 4 is provided with a labeling area, so that a product label can be posted on the side wall of the piston chamber 4, thereby facilitating the identification of product information.

[0031] Reference Figure 1-Figure 4 In the present invention, when working, air is firstly inflated into the upper cavity of the piston chamber 4 through the first air inlet pipe 7, and the piston plate 41 is squeezed under the action of air pressure, so that the piston plate 41 pushes the vertical push rod 42 downward, thereby squeezing the transverse plate 51, and then under the transmission action of the first hinge plate 52 and the second hinge plate 53, the second hinge plate 53 is finally rotated along the hinge point with the side wall of the clamping chamber 5, thereby simultaneously pushing the transverse push rods 6 on both sides to approach the middle, and at this time the transverse plate 51 and the first hinge plate 53 are in contact with each other. 2 and the second hinge plate 53 form a force-saving lever, so that the force applied to the transverse plate 51 is amplified at the end of the transverse push rod 6, thereby improving the clamping effect of the transverse push rod 6, and finally the clamping plates 61 on both sides clamp the sample, and finally a pulling force is applied to the ends of the upper clamp 1 and the lower clamp 2 at the same time to realize the tension detection of the sample; then the first air inlet pipe 7 is controlled to return air, and the lower cavity of the piston chamber 4 is inflated from the second air inlet pipe 71, so as to push the transverse plate 51 to reset and release the clamping of the sample.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pneumatic clamp for tensile testing of a specimen, comprising an upper clamp (1) and a lower clamp (2), It is characterized in that The upper fixture (1) further comprises a base plate (3), the bottom of the base plate (3) being fixedly connected to a piston chamber (4), the inner wall of the piston chamber (4) being slidably connected to a piston plate (41), and the bottom of the piston plate (41) being fixedly connected to a vertical push rod (42); The bottom of the piston bin (4) is fixedly connected to a clamping bin (5), the bottom of the vertical push rod (42) passes through the clamping bin (5) and is fixedly connected to a transverse plate (51), both sides of the transverse plate (51) are rotatably connected to a first hinge plate (52), the side of the first hinge plate (52) away from the transverse plate (51) is rotatably connected to a second hinge plate (53), both sides of the clamping bin (5) are slidably connected to a transverse push rod (6), the middle part of the second hinge plate (53) is rotatably connected to the side wall of the clamping bin (5), the end of the second hinge plate (53) away from the first hinge plate (52) is hinged to the side wall of the transverse push rod (6), and the ends of the transverse push rods (6) close to each other are fixedly connected to a clamping plate (61).

2. A pneumatic clamp for tensile testing of a specimen according to claim 1, It is characterized in that The side walls of the piston chamber (4) are respectively fixedly connected with a first air intake pipe (7) and a second air intake pipe (71); the first air intake pipe (7) and the second air intake pipe (71) are respectively connected with the upper and lower cavities of the piston chamber (4).

3. A pneumatic clamp for tensile testing of a specimen according to claim 2, It is characterized in that The communicating ends of the first air intake pipe (7) and the second air intake pipe (71) are respectively located on both sides of the piston plate (41).

4. A pneumatic clamp for tensile testing of a specimen according to claim 1, It is characterized in that A first sealing strip (8) is fixedly connected between the connection point between the base plate (3) and the piston chamber (4).

5. A pneumatic clamp for tensile testing of a specimen according to claim 1, It is characterized in that A second sealing strip (81) is fixedly connected to the middle portion of the side wall of the piston plate (41).

6. A pneumatic clamp for tensile testing of a specimen according to claim 1, It is characterized in that A third sealing strip (82) is fixedly connected between the vertical push rod (42) and the bottom of the piston chamber (4).

7. A pneumatic clamp for tensile testing of a specimen according to claim 1, It is characterized in that A connecting seat (9) is fixedly connected to the top of the base plate (3), a connecting ear (91) is connected to the top of the connecting seat (9), and a connecting hole (92) is provided on the side wall of the connecting ear (91).

8. A pneumatic clamp for tensile testing of a specimen according to claim 1, It is characterized in that The clamping plate (61) and the transverse push rod (6) are fixedly connected via bolts.

9. A pneumatic clamp for tensile testing of a specimen according to claim 1, It is characterized in that The side wall of the piston chamber (4) is provided with a labeling area.

10. A pneumatic clamp for tensile testing of a specimen according to claim 1, It is characterized in that The upper clamp (1) and the lower clamp (2) have the same structure, and the upper clamp (1) and the lower clamp (2) are symmetrically arranged.

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