Pneumatic fatigue tension-torsion clamp

Abstract

The utility model discloses a pneumatic fatigue tension-torsion clamp, relates to the technical field of pneumatic clamps, and aims to solve the problem that the two ends of a clamped strip-shaped component incline at a certain angle with the clamping surface of the clamp because the strip-shaped component generally needs to be manually placed before clamping at present. The fatigue testing device comprises a testing seat, a testing table is fixedly arranged at the top of the testing seat, a fatigue testing machine body is fixedly arranged on the upper end face of the testing table, and a sliding seat used for driving the strip-shaped component to conduct fatigue testing is movably arranged in the fatigue testing machine body. Clamping assemblies are detachably mounted in the middles of the lower end face of the sliding seat and the upper end face of the test table, each clamping assembly comprises a mounting seat with a clamping part fixedly arranged at the top, and each clamping part comprises rocker arm assemblies which are symmetrically and movably arranged at the top and used for clamping the strip-shaped part. The clamping device has the advantage that the friction force is increased in the clamping process of the strip-shaped component.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic clamps, and more specifically to a pneumatic fatigue tension-torsion clamp. Background Art

[0002] Tension-torsion fatigue testing machine, tension-torsion combined fatigue testing machine is designed to perform static and dynamic bi-directional testing of shaft materials, applications include tension-compression techniques as well as fatigue testing or high usage. The load frame structure is designed for maximum axial / torsion stiffness in the application.

[0003] At present, during the use of the tension-torsion fatigue testing machine, it is necessary to clamp and fix the two ends of the test piece to prevent the test piece from loosening during the test. When the existing clamp performs fatigue testing on the tension of the flexible strip-like component, it usually clamps it on both sides of the two ends using a plane clamping method. Since the strip-like component generally needs to be placed manually before clamping, the two ends of the strip-like component are inclined at a certain angle to the clamping surface of the clamp after clamping, which makes it easy to slip during the tension test. In view of this, we propose a pneumatic fatigue tension-torsion clamp. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art, meet the actual needs, and provide a pneumatic fatigue tension and torsion clamp to solve the current technical problem that the strip parts generally need to be placed manually before clamping, so that after clamping, the two ends of the strip parts are inclined at a certain angle to the clamping surface of the clamp, which leads to easy slippage during tensile testing.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a pneumatic fatigue tension and torsion fixture, comprising a test seat with a test table fixed on the top;

[0006] A fatigue test body is fixedly arranged on the upper end surface of the test bench, a slide seat for driving the belt-shaped component to perform fatigue testing is movably arranged in the fatigue test body, and a clamping assembly is detachably installed in the center of the lower end surface of the slide seat and the upper end surface of the test bench;

[0007] The clamping assembly comprises a mounting seat with a clamping component fixedly arranged on the top;

[0008] The clamping component includes a rocker arm assembly symmetrically and movably arranged on the top for clamping the strip-shaped component, and a pneumatic component for driving the rocker arm assembly to clamp and loosen is detachably installed in the clamping component;

[0009] The rocker arm assembly includes a clamp arm body with an anti-skid assembly detachably mounted on one side;

[0010] The anti-skid assembly includes a side structure formed with anti-skid teeth for increasing friction during the clamping process of the belt-shaped component, and the bottom of one side of the anti-skid clamp is equidistantly structured with anti-skid structures.

[0011] The utility model designs the anti-skid component structure on one side of the clamp arm body, and generates a plurality of pressure areas with small contact areas and increased surface contact pressure on the surface of the strip component through the anti-skid teeth formed on the surface of the anti-skid clamp plate, thereby increasing the friction force in the process of clamping the strip component, and solves the problem that the strip component generally needs to be placed manually before clamping, so that the two ends of the strip component are inclined at a certain angle to the clamping surface of the clamp after clamping, which makes it easy to slip when performing a tensile test.

[0012] Preferably, the anti-skid structure includes anti-skid convex strips equidistantly arranged at the bottom of one side of the anti-skid splint, and the anti-skid convex strips in the symmetrically arranged rocker arm assembly are staggered to form an S-shaped groove body that has an invasive anti-skid squeezing effect on the strip-shaped component.

[0013] Preferably, a plurality of spherical protrusions are constructed on the outer edge surface of the anti-slip convex strip, and the spherical protrusions are spirally arranged equidistantly on the surface of the anti-slip convex strip, and the spherical protrusions on the outer surfaces of two adjacent anti-slip convex strips are arranged in mirror symmetry with each other.

[0014] Preferably, the clamping component comprises a U-shaped carrier frame with triangular plates at both ends, the top of the triangular plate is symmetrically structured to form a lug 1, and an axial hole 1 is opened inside the lug 1.

[0015] Preferably, the pneumatic component includes a mounting frame with a cylinder fixedly installed inside, a fixing plate detachably installed in a U-shaped carrier frame is fixedly installed on the top of the mounting frame, a pneumatic telescopic rod is movably installed inside the cylinder, a connecting block 1 is provided on the top structure of the pneumatic telescopic rod, a connecting block 2 is detachably installed on the top of the connecting block 1, ear plates are symmetrically constructed at both ends of the connecting block 2, and shaft holes 2 are opened inside the ear plates.

[0016] Preferably, a convex shaft is provided at the bottom structure of one side of the clamp arm body, an axial hole three is opened inside the convex shaft, and a rotating shaft one is rotatably installed between the axial hole three and the axial hole one, and a convex lug two is symmetrically provided at the bottom structure of the other side of the clamp arm body, a connecting plate is rotatably installed in the symmetrically arranged convex lug two, an axial hole three is opened at one end of the connecting plate, and a rotating shaft two is rotatably installed in the axial hole three and the axial hole two.

[0017] Preferably, the mounting seat is provided with fixing bolts for fixing the mounting seat.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The utility model designs the anti-skid component structure on one side of the clamp arm body, and generates a plurality of pressure areas with small contact areas and increased surface contact pressure on the surface of the strip component through the anti-skid teeth formed on the surface of the anti-skid clamp plate, thereby increasing the friction force during the clamping process of the strip component, and solves the problem that the strip component generally needs to be placed manually before clamping, so that the two ends of the strip component are inclined at a certain angle to the clamping surface of the clamp after clamping, which makes it easy to slip during the tensile test.

[0020] 2. The utility model also designs an anti-skid convex strip structure at an equidistant structure on the bottom of one side of the anti-skid splint, and the anti-skid convex strips in the symmetrically arranged rocker arm assembly are staggered to form an S-shaped groove body that has an invasive anti-skid squeezing effect on the strip component, so that when the strip component is clamped, the two sides of the strip component are forced to be compressed and twisted, thereby further increasing the surface contact pressure and achieving the effect of improving the friction force in the clamping process. At the same time, spherical protrusions distributed in a spiral shape are arranged on the surface of the anti-skid convex strip, and the spherical protrusions on the outer surfaces of two adjacent anti-skid convex strips are designed to be arranged in mirror symmetry with each other, which is conducive to generating irregular invasive squeezing areas on the clamping surface of the strip component, thereby further improving the friction force in the clamping process, and further solving the problem that the strip component generally needs to be placed manually before clamping, so after clamping, the two ends of the strip component are inclined at a certain angle to the clamping surface of the clamp, which makes it easy to slip during the tensile test. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the clamping assembly of the utility model;

[0023] Figure 3 It is a structural schematic diagram of the clamping component of the utility model;

[0024] Figure 4 This is a schematic diagram of the disassembly of the clamping component of the utility model;

[0025] Figure 5 It is a schematic diagram of the structure of the pneumatic component of the utility model;

[0026] Figure 6 It is a structural schematic diagram of the anti-skid component of the utility model.

[0027] Description of the numbers in the figure:

[0028] 1. Test seat; 2. Test bench; 3. Fatigue test machine; 4. Slide seat; 5. Clamping assembly; 501. Mounting seat; 502. Fixing bolt; 6. Clamping component; 601. U-shaped carrier frame; 602. Triangle plate; 603. Lug 1; 7. Pneumatic component; 701. Mounting frame; 702. Cylinder; 703. Fixing plate; 704. Pneumatic telescopic rod; 705. Connecting block 1; 706. Connecting block 2; 707. Lug plate; 8. Rocker arm assembly; 801. Clamp arm body; 802. Protruding shaft; 803. Lug 2; 804. Connecting plate; 9. Anti-skid assembly; 901. Anti-skid splint; 902. Anti-skid teeth; 903. Anti-skid convex strip; 904. Spherical protrusion. DETAILED DESCRIPTION

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, the utility model relates to a pneumatic fatigue tension and torsion clamp, comprising a test seat 1 with a test bench 2 fixedly arranged on the top, a fatigue test body 3 fixedly arranged on the upper end surface of the test bench 2, a slide seat 4 for driving a belt-like component for fatigue testing movably arranged in the fatigue test body 3, a clamping assembly 5 detachably installed in the lower end surface of the slide seat 4 and the upper end surface of the test bench 2, the clamping assembly 5 comprises a mounting seat 501 with a clamping component 6 fixedly arranged on the top, the clamping component 6 comprises a rocker arm assembly 8 symmetrically and movably arranged on the top for clamping the belt-like component, and a pneumatic component 7 for driving the rocker arm assembly 8 for clamping and loosening is detachably installed in the clamping component 6, the rocker arm assembly 8 comprises a clamping arm body 801 with an anti-skid assembly 9 detachably installed on one side, the anti-skid assembly 9 comprises a side structure formed with anti-skid teeth 902 for increasing friction in the process of clamping the belt-like component, and an anti-skid structure is equidistantly arranged on the bottom of one side of the anti-skid splint 901.

[0030] like Figure 3 , Figure 4 and Figure 6 As shown, in an embodiment of the utility model, the anti-skid structure includes anti-skid ridges 903 equidistantly arranged at the bottom of one side of the anti-skid splint 901, the anti-skid ridges 903 in the symmetrically arranged rocker arm assembly 8 are staggered and form an S-shaped groove body that has an invasive anti-skid squeezing effect on the strip-like component, and a plurality of spherical protrusions 904 are constructed on the outer edge surface of the anti-skid ridge 903. The spherical protrusions 904 are spirally equidistantly arranged on the surface of the anti-skid ridge 903, and the spherical protrusions 904 on the outer surfaces of two adjacent anti-skid ridges 903 are arranged in mirror symmetry.

[0031] like Figure 3-Figure 5As shown, in the embodiment of the utility model, the clamping component 6 includes a U-shaped carrier frame 601 with triangular plates 602 at both ends, the top of the triangular plate 602 is symmetrically structured to form a lug 603, and the lug 603 is provided with an axial hole, and the pneumatic component 7 includes a mounting frame 701 with a cylinder 702 fixedly provided therein, a fixing plate 703 detachably installed in the U-shaped carrier frame 601 is fixedly provided on the top of the mounting frame 701, a pneumatic telescopic rod 704 is movably installed in the cylinder 702, and a connecting block 705 is provided on the top of the pneumatic telescopic rod 704, and the connecting block 705 is A connecting block 2 706 is detachably installed on the top, and ear plates 707 are symmetrically constructed at both ends of the connecting block 2 706. An axial hole 2 is opened inside the ear plate 707. A convex shaft 802 is arranged at the bottom of one side of the clamp arm body 801, and an axial hole 3 is opened inside the convex shaft 802, and a rotating shaft 1 is rotatably installed between the axial hole 3 and the axial hole 1. A convex ear 2 803 is symmetrically constructed at the bottom of the other side of the clamp arm body 801, and a connecting plate 804 is rotatably installed in the symmetrically arranged convex ear 803. An axial hole 3 is opened at one end of the connecting plate 804, and a rotating shaft 2 is rotatably installed in the axial hole 3 and the axial hole 2.

[0032] like Figure 2 As shown, in the embodiment of the present utility model, a fixing bolt 502 for fixing the mounting seat 501 is disposed inside the mounting seat 501 .

[0033] Working principle: This embodiment provides a pneumatic fatigue tension and torsion clamp. When in use, first place the two ends of the strip component between the rocker arm assemblies 8 respectively, and then start the cylinder 702 to make the pneumatic telescopic rod 704 drive the connecting block 2 706 to move, thereby driving the connecting plate 804 to move through the rotating shaft 2, and driving the clamping arm body 801 to deflect as a whole through the rotating shaft 1, so as to clamp the strip component. During the clamping process, the anti-skid teeth 902 formed on the surface of the anti-skid clamping plate 901 generate multiple pressure areas with small contact areas and increased surface contact pressure on the surface of the strip component, thereby increasing the friction during the clamping process of the strip component. The anti-skid ridges 903 are designed with an equidistant structure, and the anti-skid ridges 903 in the symmetrically arranged rocker arm assembly 8 are staggered to form an S-shaped groove body that has an invasive anti-skid squeezing effect on the strip component, so that when the strip component is clamped, both sides of the strip component are forced to be compressed and twisted, thereby further increasing the surface contact pressure and achieving the effect of improving the friction during the clamping process. At the same time, spirally distributed spherical protrusions 904 are arranged on the surface of the anti-skid ridges 903, and the spherical protrusions 904 on the outer surfaces of two adjacent anti-skid ridges 903 are designed to be arranged in mirror symmetry with each other, which is conducive to generating irregular invasive squeezing areas on the clamping surface of the strip component, thereby further improving the friction during the clamping process.

[0034] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A pneumatic fatigue tension and torsion fixture, characterized in that: It comprises a test seat (1) with a test table (2) fixedly arranged on the top; A fatigue test body (3) is fixedly arranged on the upper end surface of the test bench (2), a slide seat (4) for driving the belt-shaped component to perform fatigue testing is movably arranged inside the fatigue test body (3), and a clamping assembly (5) is detachably mounted in the center of the lower end surface of the slide seat (4) and the upper end surface of the test bench (2); The clamping assembly (5) comprises a mounting seat (501) on the top of which a clamping component (6) is fixedly arranged; The clamping component (6) comprises a rocker arm assembly (8) symmetrically and movably arranged on the top for clamping the strip-shaped component, and a pneumatic component (7) for driving the rocker arm assembly (8) to clamp and release is detachably installed in the clamping component (6); The rocker arm assembly (8) comprises a clamp arm body (801) on one side of which an anti-slip assembly (9) is detachably mounted; The anti-skid assembly (9) comprises a side structure formed with anti-skid teeth (902) for increasing friction during the clamping process of the belt-shaped component, and an anti-skid structure is equidistantly arranged at the bottom of one side of the anti-skid clamping plate (901).

2. The pneumatic fatigue tension and torsion fixture according to claim 1 is characterized in that: The anti-skid structure comprises anti-skid convex strips (903) equidistantly arranged at the bottom of one side of the anti-skid cleat (901), and the anti-skid convex strips (903) in the symmetrically arranged rocker arm assembly (8) are staggered to form an S-shaped groove body that has an invasive anti-skid squeezing effect on the strip-shaped component.

3. The pneumatic fatigue tension and torsion fixture according to claim 2 is characterized in that: A plurality of spherical protrusions (904) are constructed on the outer edge surface of the anti-slip convex strip (903), and the spherical protrusions (904) are arranged equidistantly on the surface of the anti-slip convex strip (903) in a spiral shape, and the spherical protrusions (904) on the outer surfaces of two adjacent anti-slip convex strips (903) are arranged in mirror symmetry with each other.

4. The pneumatic fatigue tension-torsion fixture according to claim 1 is characterized in that: The clamping component (6) comprises a U-shaped carrier frame (601) with triangular plates (602) at both ends, the top of the triangular plate (602) is symmetrically structured to form a lug (603), and an axial hole (603) is provided inside the lug (603).

5. The pneumatic fatigue tension-torsion fixture according to claim 4 is characterized in that: The pneumatic component (7) comprises a mounting frame (701) in which a cylinder (702) is fixedly arranged, a fixing plate (703) which is detachably mounted in a U-shaped carrier frame (601) is fixedly arranged on the top of the mounting frame (701), a pneumatic telescopic rod (704) is movably mounted inside the cylinder (702), a connecting block 1 (705) is arranged on the top of the pneumatic telescopic rod (704), a connecting block 2 (706) is detachably mounted on the top of the connecting block 1 (705), both ends of the connecting block 2 (706) are symmetrically structured with ear plates (707), and an axial hole 2 is opened inside the ear plate (707).

6. The pneumatic fatigue tension-torsion fixture according to claim 5, characterized in that: The bottom structure of one side of the clamp arm body (801) is provided with a convex shaft (802), and the inside of the convex shaft (802) is provided with an axial hole three, and a rotating shaft one is rotatably installed between the axial hole three and the axial hole one. The bottom structure of the other side of the clamp arm body (801) is symmetrically provided with a lug two (803), and a connecting plate (804) is rotatably installed in the symmetrically arranged lug two (803), and one end of the connecting plate (804) is provided with an axial hole three, and a rotating shaft two is rotatably installed in the axial hole three and the axial hole two.

7. The pneumatic fatigue tension-torsion fixture according to claim 1 is characterized in that: The mounting seat (501) is provided with fixing bolts (502) for fixing the mounting seat.

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