Pneumatic horizontal pushing clamp for testing machine

Abstract

The utility model discloses a pneumatic horizontal pushing clamp for a testing machine, and relates to the technical field of tensile testing of metal and non-metal plates. The device comprises an upper device set and a lower device set, air cylinders are fixedly connected to the interiors of the upper device set and the lower device set in an axial symmetry mode, clamping assemblies are fixedly connected to the top faces of the air cylinders, and buffering assemblies are fixedly connected to the side faces of the clamping assemblies. Through the arrangement of the air cylinder and the clamping assembly, the air cylinder stretches out and draws back to drive the wedge-shaped body with the side face rotationally connected through the rotating block to rotate, the wedge-shaped body drives the swing arm with the side face fixed through the rotating block to rotate, the swing arm drives the jaw base to move through the rotating block, and the jaw fixed to the side face of the jaw base moves; metal and non-metal plates are clamped and fixed, a force transmission clamping mode is adopted, a double-air-cylinder mode is adopted for pneumatic clamping and loosening, clamping and opening are more stable, and therefore the effect that stable clamping cannot be achieved through small horizontal pushing is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of tensile testing of metal and non-metal plates. Specifically, it relates to a pneumatic flat-pushing fixture for a testing machine. Background Art

[0002] With the improvement of the technology of mechanical engineering materials in the prior art, various properties of materials have been continuously improved. Previously, hydraulic fixtures were always used, but the initial clamping force of the hydraulic flat push was too large and could damage the specimen; when clamping composite materials with high tensile strength, the small flat push could not hold them.

[0003] Chinese Patent with publication number CN206038429U discloses a servo electric cylinder force-applying flat-pushing fixture testing machine, which includes a base, guiding columns, an upper cross beam, a servo electric cylinder and a hydraulic flat-pushing fixture. The upper cross beam is connected to the base through at least two guiding columns; a slidable upper bearing cross beam is sleeved on the guiding columns. A lower bearing cross beam and a tension-compression type spoke sensor are arranged at the lower end of the upper bearing cross beam. The movable end of the servo electric cylinder is connected to the upper bearing cross beam; the hydraulic flat-pushing fixture includes an upper flat-pushing fixture and a lower flat-pushing fixture arranged on the upper bearing cross beam and the lower bearing cross beam. The upper flat-pushing fixture includes an upper fixture and a cylinder barrel. A piston assembly is arranged in the cylinder barrel. The piston assembly includes a piston and a piston rod integrally formed. The outside of the piston assembly is sealed by an end cover. A flat-pushing clip is arranged at one end of the piston rod. The utility model has simple operation, convenient installation and maintenance, small overall occupied height, high overall machine stiffness, high testing accuracy and easy repair and maintenance.

[0004] In view of this, the present utility model is particularly proposed. Summary of the Utility Model

[0005] The technical problem to be solved by the present utility model is to overcome the deficiencies of the prior art and provide a pneumatic flat-pushing fixture for a testing machine, solving the problems raised in the above background art.

[0006] To solve the above technical problem, the basic concept of the technical solution adopted by the present utility model is:

[0007] A pneumatic flat-pushing fixture for a testing machine includes: an upper equipment group and a lower equipment group. Symmetrically axially fixed cylinders are arranged inside the upper equipment group and the lower equipment group. A clamping assembly is fixedly connected to the top surface of the cylinder, and a buffer assembly is fixedly connected to the side surface of the clamping assembly.

[0008] The clamping assembly includes a rotating block fixedly connected to the top surface of the cylinder. The number of the rotating blocks is several. A wedge body is fixedly connected to the top surface of the rotating block. Another rotating block is fixedly connected to the side surface of the wedge body. A swing arm is fixedly connected to the side surface of the other rotating block. Another rotating block is fixedly connected to the side surface of the swing arm. A jaw seat is fixedly connected to the side surface of the other rotating block. A jaw is fixedly connected to the side surface of the jaw seat.

[0009] Optionally, a rotating hole is formed in the side surface of the wedge body. A support rod is rotatably connected inside the rotating hole. The support rod is fixedly connected inside the upper equipment group and the lower equipment group.

[0010] Optionally, a support opening is formed in the side surface of the swing arm. A support block is rotatably connected inside the support opening. The support block is fixedly connected inside the upper equipment group and the lower equipment group.

[0011] Optionally, the buffer assembly includes a left side plate fixedly connected to the side surface of the jaw. Left arc plates are fixedly connected to the side surface of the left side plate in an axisymmetric manner. A right arc plate is slidably connected to the side surface of the left arc plate. A right side plate is fixedly connected to the side surface of the right arc plate. The left side plate is fixedly connected to the right side plate through a spring.

[0012] Optionally, a slider is fixedly connected to the surface of the left arc plate. A sliding groove is formed in the surface of the right arc plate. The slider is slidably connected inside the sliding groove. A buffer plate is fixedly connected to the side surface of the left side plate. A rubber pad is fixed to the side surface of the buffer plate.

[0013] Optionally, mounting holes are formed in the top surfaces of the upper equipment group and the lower equipment group. A joint is arranged inside the mounting hole. A locking nut for installation is threadedly connected to the surface of the joint. Centering rods are fixedly connected to the surfaces of the upper equipment group and the lower equipment group.

[0014] After adopting the above technical solution, the present utility model has the following beneficial effects compared with the prior art. Of course, any product implementing the present utility model does not necessarily need to achieve all the advantages described below at the same time:

[0015] 1. Through the setting of the cylinder and the clamping assembly, when the cylinder expands and contracts, it drives the wedge body rotatably connected to the side through the rotating block to rotate. The wedge body then drives the swing arm fixed to the side through the rotating block to rotate. The swing arm drives the jaw seat to move through the rotating block, and the jaw fixed to the side surface of the jaw seat moves to clamp and fix metal and non-metal plates. The clamping method adopts the force transmission clamping method, and the pneumatic clamping and loosening adopt the double-cylinder method, making the clamping and opening more stable, thereby achieving the effect of avoiding the inability to firmly clamp with a small flat push.

[0016] 2. Through the setting of the buffer component, when the jaws clamp the material, the movement of the jaws pushes the right plate, compressing the spring. During the contraction of the spring, the energy of the force when contacting the material on the side of the left plate is absorbed and buffered, thus achieving the effect of preventing damage to the material caused by excessive clamping force.

[0017] The following further describes in detail the specific implementation manners of the present utility model with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings in the following description are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the attached

[0019] In the figures:

[0020] Figure 1 is a schematic diagram of the overall structure;

[0021] Figure 2 is a schematic diagram of the clamping component structure;

[0022] Figure 3 is a schematic diagram of the buffer component structure;

[0023] Figure 4 is a schematic diagram of the disassembled structure.

[0024] In the drawings, the list of components represented by each reference numeral is as follows:

[0025] 1. Upper equipment group; 2. Lower equipment group; 3. Cylinder; 4. Clamping component; 41. Rotating block; 42. Wedge body; 43. Swing arm; 44. Jaw seat; 45. Jaw; 5. Buffer component; 51. Left plate; 52. Left arc plate; 53. Right arc plate; 54. Right plate; 55. Spring; 6. Support rod; 7. Support block; 8. Buffer plate; 9. Connector; 10. Locking nut; 11. Centering rod.

[0026] It should be noted that these drawings and the text description are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present utility model to those skilled in the art by referring to specific embodiments. SPECIFIC EMBODIMENTS

[0027] Now, the present utility model will be further described in detail with reference to the accompanying drawings.

[0028] Please refer to Figures 1-4 As shown, in this embodiment, a pneumatic flat-pushing fixture for a testing machine is provided, including: an upper equipment group 1 and a lower equipment group 2. Inside the upper equipment group 1 and the lower equipment group 2, cylinders 3 are fixedly connected in an axisymmetric manner. The top surface of the cylinder 3 is fixedly connected with a clamping component 4, and the side surface of the clamping component 4 is fixedly connected with a buffer component 5.

[0029] One application of this embodiment is as follows: Traditional pneumatic flat-push clamps are designed for specimens with relatively low force values. For larger specimens, hydraulic flat-push clamps are used. The design of this clamp solves the problem that some composite materials with high tensile strength cannot be clamped by small flat-push clamps, and using a hydraulic flat-push clamp with too large an initial clamping force will damage the specimen.

[0030] With the technological improvement of mechanical engineering materials, the various properties of materials have been continuously improved. Previously, hydraulic clamps were always used, and pneumatic clamps with large force values fill the gap in this aspect of pneumatic clamps. It should be noted that all electrical equipment involved in this application can be powered by a storage battery or an external power source.

[0031] As Figure 2 shown, a rotating hole is provided on the side surface of the wedge-shaped body 42 of this embodiment. A support rod 6 is rotatably connected inside the rotating hole. The support rod 6 is fixedly connected inside the upper equipment group 1 and the lower equipment group 2. A support port is provided on the side surface of the swing arm 43. A support block 7 is rotatably connected inside the support port. The support block 7 is fixedly connected inside the upper equipment group 1 and the lower equipment group 2;

[0032] Through the settings of the support rod 6 and the support block 7, the support rod 6 provides rotational support for the wedge-shaped body 42, and the support block 7 provides rotational support for the swing arm 43, making its rotation smoother and avoiding affecting the clamping performance.

[0033] As Figure 3 shown, a slider is fixedly connected to the surface of the left arc plate 52 of this embodiment. A chute is provided on the surface of the right arc plate 53. The slider is slidably connected inside the chute. A buffer plate 8 is fixedly connected to the side surface of the left side plate 51. A rubber pad is fixed to the side surface of the buffer plate 8;

[0034] Through the setting of the buffer plate 8, the rubber pad fixed to its side surface can greatly increase the flexible contact between the buffer plate 8 and the material, avoiding damage to the material.

[0035] Embodiment 1:

[0036] In this embodiment, the clamping assembly 4 includes a rotating block 41 fixedly connected to the top surface of the cylinder 3. The number of the rotating blocks 41 is several. A wedge-shaped body 42 is fixedly connected to the top surface of the rotating block 41. Another rotating block 41 is fixedly connected to the side surface of the wedge-shaped body 42. A swing arm 43 is fixedly connected to the side surface of the another rotating block 41. Another rotating block 41 is fixedly connected to the side surface of the swing arm 43. A jaw seat 44 is fixedly connected to the side surface of the another rotating block 41. A jaw 45 is fixedly connected to the side surface of the jaw seat 44;

[0037] Through the arrangement of the cylinder 3 and the clamping assembly 4, the cylinder 3 expands and contracts, driving the wedge body 42 rotatably connected to the side through the rotating block 41 to rotate. The wedge body 42 then drives the swing arm 43 fixed to the side through the rotating block 41 to rotate. The swing arm 43 drives the jaw seat 44 to move through the rotating block 41, and the jaws 45 fixed to the side of the jaw seat 44 move to clamp and fix metal and non-metal plates. The clamping method adopts the force transmission clamping method, and the pneumatic clamping and loosening adopt the double-cylinder method, making the clamping and opening more stable, thus achieving the effect of avoiding the inability to firmly clamp with a small flat push.

[0038] Embodiment 2:

[0039] In this embodiment, the buffer assembly 5 includes a left side plate 51 fixedly connected to the side of the jaw 45. The side of the left side plate 51 is symmetrically fixedly connected with a left arc plate 52. The side of the left arc plate 52 is slidably connected with a right arc plate 53. The side of the right arc plate 53 is fixedly connected with a right side plate 54. The left side plate 51 is fixedly connected to the right side plate 54 through a spring 55.

[0040] Through the arrangement of the buffer assembly 5, when the jaw 45 clamps the material, the jaw moves to push the right side plate 54, causing it to compress the spring 55. During the contraction of the spring 55, the energy of the force when contacting the material on the side of the left side plate 51 is absorbed and buffered, thus achieving the effect of avoiding damage to the material due to excessive clamping force.

[0041] The present utility model is not limited to the above embodiments. Anyone should know that structural changes made under the inspiration of the present utility model, as long as they have the same or similar technical solutions as the present utility model, fall within the protection scope of the present utility model. The technologies, shapes, and structures not detailedly described in the present utility model are all well-known technologies.

Claims

1. A pneumatic horizontal push fixture for a testing machine, characterized in that: include: An upper equipment group (1) and a lower equipment group (2), wherein the interiors of the upper equipment group (1) and the lower equipment group (2) are fixedly connected with a cylinder (3) in an axisymmetric manner, the top surface of the cylinder (3) is fixedly connected with a clamping assembly (4), and the side surface of the clamping assembly (4) is fixedly connected with a buffer assembly (5); The clamping assembly (4) comprises a rotating block (41) fixedly connected to the top surface of the cylinder (3), the rotating blocks (41) are of a certain number, the top surface of the rotating block (41) is fixedly connected to a wedge-shaped body (42), the side surface of the wedge-shaped body (42) is fixedly connected to another rotating block (41), the side surface of the other rotating block (41) is fixedly connected to a swing arm (43), the side surface of the swing arm (43) is fixedly connected to another rotating block (41), the side surface of the other rotating block (41) is fixedly connected to a jaw seat (44), and the side surface of the jaw seat (44) is fixedly connected to a jaw (45).

2. A pneumatic horizontal push fixture for a testing machine according to claim 1, characterized in that: A rotating hole is provided on the side of the wedge-shaped body (42), and a support rod (6) is rotatably connected inside the rotating hole. The support rod (6) is fixedly connected inside the upper equipment group (1) and the lower equipment group (2).

3. A pneumatic horizontal push fixture for a testing machine according to claim 1, characterized in that: A support opening is provided on the side of the swing arm (43), and a support block (7) is rotatably connected inside the support opening. The support block (7) is fixedly connected inside the upper equipment group (1) and the lower equipment group (2).

4. A pneumatic horizontal push fixture for a testing machine according to claim 1, characterized in that: The buffer assembly (5) comprises a left side plate (51) fixedly connected to the side of the jaw (45); the side of the left side plate (51) is axially symmetrically fixedly connected to a left arc plate (52); the side of the left arc plate (52) is slidably connected to a right arc plate (53); the side of the right arc plate (53) is fixedly connected to a right side plate (54); and the left side plate (51) is fixedly connected to the right side plate (54) via a spring (55).

5. A pneumatic horizontal push fixture for a testing machine according to claim 4, characterized in that: A slider is fixedly connected to the surface of the left arc plate (52), a slide groove is provided on the surface of the right arc plate (53), a slider is slidably connected inside the slide groove, a buffer plate (8) is fixedly connected to the side of the left side plate (51), and a rubber pad is fixed to the side of the buffer plate (8).

6. The pneumatic horizontal push fixture for a testing machine according to claim 1, characterized in that: The top surfaces of the upper equipment group (1) and the lower equipment group (2) are both provided with mounting holes, a joint (9) is arranged inside the mounting hole, a locking nut (10) for mounting is threadedly connected to the surface of the joint (9), and a centering rod (11) is fixedly connected to the surface of the upper equipment group (1) and the lower equipment group (2).

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