Tensile testing machine clamp

Abstract

The tensile testing machine clamp comprises a box body with an opening at the upper end; the bracket is arranged above the box body; the clamping mechanism is arranged on the bracket and comprises a first clamping unit and a second clamping unit, and the first clamping unit and the second clamping unit are matched for use and are used for clamping the to-be-tested material; and the protective cover is arranged on the box body in a sliding manner and is used for covering the outer part of the clamping mechanism. According to the clamp for the tensile testing machine, on one hand, the protective cover is arranged, so that the dangerous conditions that the skin of a tester is cut, even eyes are broken and damaged and the like due to chippings caused by sudden breakage of the to-be-tested material in the tensile testing process of the to-be-tested material are avoided, and the safety of the tester is greatly improved; the clamping mechanism is elaborately arranged, so that the to-be-tested material can be quickly and stably clamped.

Description

Technical Field

[0001] The present invention relates to the technical field of material tensile testing, and more particularly to a clamp for a tensile testing machine. Background Art

[0002] Tensile testing is an important method for measuring the mechanical properties of materials. It determines the material's properties by applying an axial tensile load. During a tensile test, a material sample is fixed between two clamps of a testing machine, and a tensile force is gradually applied until the sample breaks. By recording the changes in force and elongation throughout the process, a series of key material performance indicators can be obtained, such as elastic limit, yield point, tensile strength, elongation, and elastic modulus.

[0003] Through searching, Chinese patent announcement number CN220650297U discloses a feeding structure and a forging tensile testing machine, including a tensile testing machine, a bidirectional screw and a limiting slide. The upper end of the tensile testing machine is provided with a support block, one end of the support block is provided with a motor and a driving gear, one end of the bidirectional screw is provided with a driven gear, and the limiting slide is connected to a telescopic spring. The above-mentioned prior art ensures smoothness through the limiting slide, while further increasing the stability of the clamp during feeding movement by stretching or compressing the telescopic spring.

[0004] However, with respect to the above-mentioned related technologies, the inventors found the following deficiencies: the existing technologies are difficult to block dust and debris during stretching; during testing, when the material reaches its ultimate strength, it will suddenly break, and debris will appear when it breaks. However, the debris usually has sharp edges, and the high-speed flying debris may cut the skin, causing cuts and scratches of varying degrees. The wounds may bleed and be painful, and may cause infection if not handled properly. If the debris enters the eyes, it can easily scratch the cornea, causing symptoms such as eye pain, tearing, and blurred vision. Summary of the Invention

[0005] In view of this, an object of the present invention is to provide a tensile testing machine clamp, aiming to solve the problems existing in the prior art.

[0006] A tensile testing machine fixture provided by the present invention includes:

[0007] a box body having an open upper end;

[0008] A bracket is arranged above the box;

[0009] The clamping mechanism is provided on the bracket and includes a first clamping unit and a second clamping unit, wherein the first clamping unit and the second clamping unit cooperate to clamp the material to be tested;

[0010] The protective cover is slidably arranged on the box body and is used for covering the outside of the clamping mechanism.

[0011] Preferably, the protective cover comprises a first protective cover and a second protective cover used in conjunction with each other, and rack plates are provided at the lower parts of the first protective cover and the second protective cover.

[0012] Preferably, a sliding plate is provided on the upper part of the interior of the box body, and the rack plates of the first protective cover and the second protective cover can be slidably mounted on the sliding plate.

[0013] Preferably, it also includes a driving mechanism disposed in the box body,

[0014] The driving mechanism includes a motor, a first gear and a second gear, the motor is in transmission connection with the first gear, and the first gear and the second gear are meshed for transmission;

[0015] The first gear is arranged below the first protective cover and meshes with the rack plate of the first protective cover, and the second gear is arranged below the second protective cover and meshes with the rack plate of the second protective cover.

[0016] Preferably, the driving mechanism further comprises a T-shaped frame and a fixing plate.

[0017] The T-shaped frame is fixed to the inner bottom wall of the box body, and the first gear and the second gear are rotatably arranged on the T-shaped frame.

[0018] The fixing plate is fixed on the side wall of the box body, and the motor is installed on the fixing plate.

[0019] Preferably, the first clamping unit and the second clamping unit each include an electric telescopic rod, a push-pull column, a limit box, two sliders and two clamping claws.

[0020] The cylinder of the electric telescopic rod is fixed on the bracket, the outward rod is connected to the first end of the push-pull column, the limit box is fixed on the bracket, the second end of the push-pull column passes through the limit box and can slide relative to the limit box, two connecting rods are provided between the push-pull column and the two sliders, the first end of each of the two connecting rods is rotatably connected to the second end of the push-pull column, and the second end of each of the two connecting rods is rotatably connected to a corresponding one of the sliders, the slider is limited in the limit box, and each of the sliders is connected to a clamping claw, and the clamping claw extends out of the limit box.

[0021] Preferably, a limiting plate is provided in the limiting box, and a sliding space is formed between the limiting plate and a side plate of the limiting box close to the clamping claw, and the slider is limited to slide in the sliding space.

[0022] Preferably, a sliding hole is opened on the side wall of the limit box close to the clamping jaws, and the two clamping jaws are connected to the slider through the sliding hole. The two clamping jaws slide along the sliding hole to move closer to and away from each other, thereby achieving clamping and loosening of the test material.

[0023] Preferably, the bracket includes a crossbeam plate and two side plates.

[0024] The two side plates are respectively connected to the two ends of the cross beam plate and are both vertically connected to the cross beam plate.

[0025] Preferably, the protective cover is passed through the crossbeam plate, and the clamping mechanism is connected to the side plate.

[0026] The tensile testing machine clamp in the present application, on the one hand, avoids the occurrence of dangerous situations such as cutting the skin of the test personnel or even injuring the eyes due to the sudden breakage of the test material and the formation of debris during the tensile test by setting a protective cover, thereby greatly improving the safety of the test personnel; the clamping mechanism is cleverly designed to achieve fast and stable clamping of the test material. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.

[0028] Figure 1 A schematic diagram of the three-dimensional structure of a tensile testing machine fixture according to an embodiment of the present invention is shown.

[0029] Figure 2 A cross-sectional view of a tensile testing machine fixture according to an embodiment of the present invention is shown.

[0030] Figure 3 Another cross-sectional view of a tensile testing machine fixture according to an embodiment of the present invention is shown.

[0031] Figure 4 Shown Figure 3 Enlarged view of part A in .

[0032] In the figure: box 1, bracket 2, clamping mechanism 3, first clamping unit 31, electric telescopic rod 311, push-pull column 312, limit box 313, limit plate 3131, slider 314, clamping claw 315, connecting rod 316, connecting plate 317, second clamping unit 32, first protective cover 41, rack plate 411, second protective cover 42, sliding plate 5, driving mechanism 6, motor 61, first gear 62, second gear 63, T-shaped frame 64, fixing plate 65. DETAILED DESCRIPTION

[0033] Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. In each of the accompanying drawings, identical elements are represented by identical or similar reference numerals. For the sake of clarity, the various parts in the accompanying drawings are not drawn to scale.

[0034] like Figures 1 to 4 As shown, the present invention provides a tensile testing machine fixture, which includes a housing 1, a bracket 2, a clamping mechanism 3, and a protective cover. The housing 1 has an open top; the bracket 2 is disposed above the housing 1; the clamping mechanism 3 is disposed on the bracket 2 and includes a first clamping unit 31 and a second clamping unit 32, which cooperate to clamp the test material; and the protective cover is slidably disposed on the housing 1 to cover the exterior of the clamping mechanism 3.

[0035] The bracket 2 includes a crossbeam and two side plates, the two side plates are respectively connected to the two ends of the crossbeam and are vertically connected to the crossbeam. A protective cover is passed through the crossbeam, and a clamping mechanism 3 is connected to the side plates.

[0036] The protective cover includes a first protective cover 41 and a second protective cover 42 that work together. Rack plates 411 are located at the bottom of each of the first and second protective covers 41 and 42. A sliding plate 5 is located above the interior of the box 1 and below the bracket 2. Both ends of the sliding plate 5 are connected to the inner wall of the box 1. The rack plates 411 of the first and second protective covers 41 and 42 are slidably mounted on the sliding plate 5.

[0037] As a preferred solution, a locking protrusion is provided on the side of the first protective cover 41 close to the second protective cover 42, and a locking groove is provided on the side of the second protective cover 42 close to the first protective cover 41, so the locking protrusion and the locking groove match each other, thereby achieving tight clamping between the two protective covers to form an overall protective structure.

[0038] In this embodiment, the first protective cover 41 and the second protective cover 42 are made of a transparent material, such as glass with a certain strength, so that the tensile test process can be observed while providing protection.

[0039] Furthermore, the tensile testing machine fixture also includes a driving mechanism 6 arranged in the box body 1, which is used to drive the first protective cover 41 and the second protective cover 42 to move closer to and away from each other, forming an integral protective cover structure when close to each other, and forming an operating space between the two when away from each other.

[0040] The driving mechanism 6 includes a motor 61, a first gear 62 and a second gear 63. The motor 61 is connected to the first gear 62, and the first gear 62 and the second gear 63 are engaged for transmission. The first gear 62 is located below the first protective cover 41 and is engaged with the rack plate 411 of the first protective cover 41. The second gear 63 is located below the second protective cover 42 and is engaged with the rack plate 411 of the second protective cover 42.

[0041] The driving mechanism 6 also includes a TT-shaped frame 64 and a fixed plate 65. The TT-shaped frame 64 is fixed to the inner bottom wall of the box body 1. The first gear 62 and the second gear 63 are rotatably arranged on the TT-shaped frame 64. The fixed plate 65 is fixed to the side wall of the box body 1. The motor 61 is installed on the fixed plate 65.

[0042] In this embodiment, when the driving mechanism 6 is started, the motor 61 drives the first gear 62 to rotate, the first gear 62 drives the rack plate 411 of the first protective cover 41, and drives the first protective cover 41 to move toward the first direction through the rack plate 411. At the same time, the first gear 62 drives the second gear 63 to rotate, and the second gear 63 drives the second protective cover 42 to move toward the second direction through the rack plate 411 of the second protective cover 42. The first direction and the second direction are opposite, thereby achieving the two protective covers moving away from each other; when the motor 61 rotates in the opposite direction, the driving mechanism 6 drives the first protective cover 41 and the second protective cover 42 to move toward each other, thereby achieving the docking of the two protective covers, forming an overall protective cover structure, and covering the material to be tested.

[0043] In this way, the test material is prevented from suddenly breaking and producing debris during the tensile test, which may cause dangerous situations such as cutting the test personnel's skin or even injuring their eyes, thereby greatly improving the safety of the test personnel.

[0044] The first clamping unit 31 and the second clamping unit 32 each include an electric telescopic rod 311, a push-pull column 312, a limit box 313, two sliders 314, and two clamping claws 315. The cylindrical body of the electric telescopic rod 311 is fixed to the bracket 2, the extension rod is connected to the first end of the push-pull column 312, the limit box 313 is fixed to the bracket 2, the second end of the push-pull column 312 passes through the limit box 313 and is slidable relative to the limit box 313, two connecting rods 316 are provided between the push-pull column 312 and the two sliders 314, the first end of each of the two connecting rods 316 is rotatably connected to the second end of the push-pull column 312, and the second end of each of the two connecting rods 316 is rotatably connected to a corresponding slider 314, the sliders 314 are limited within the limit box 313, and each slider 314 is connected to a clamping claw 315, which extends out of the limit box 313. Furthermore, a connecting plate 317 is provided between the extension rod of the electric telescopic rod 311 and the push-pull column 312 , and the two are connected via the connecting plate 317 , making the connection between the two more firm and reliable.

[0045] Specifically, a limit plate 3131 is provided within the limit box 313, positioned adjacent to the clamping jaws 315. A limited sliding space is formed between the limit plate 3131 and the side panels of the limit box 313 adjacent to the clamping jaws 315. The slider 314 is constrained to slide within the limited sliding space, and the structural dimensions of the limited sliding space match those of the slider 314. When the electric telescopic rod 311 extends, the two connecting rods 316 push the respective sliders 314 to slide away from each other within the sliding space, thereby opening the two clamping jaws 315. Similarly, when the electric telescopic rod 311 retracts, the two clamping jaws 315 are clamped. This mechanical design ensures a more stable grip between the two clamping jaws, preventing them from loosening. While opening and closing are smooth and stable, the clamping jaws also exhibit a self-locking function, creating a double self-locking effect with the self-locking mechanism of the electric telescopic rod 311, thereby achieving a secure and stable clamping of the test material.

[0046] The side wall of the limit box 313 near the clamping jaws 315 is provided with a sliding hole. The two clamping jaws 315 pass through the sliding hole and connect to the slider 314. The two clamping jaws 315 slide along the sliding hole to move closer and farther from each other, thereby clamping and releasing the test material. In this embodiment, the clamping mechanism 3 is designed in a sophisticated manner. On the one hand, it clamps firmly and stably, and can achieve stable clamping of the test material. On the other hand, the opening and closing of the two clamping jaws 315 are synchronized and smooth, and the clamping force is uniform, thereby ensuring a uniform clamping force on the test material. Furthermore, the clamping mechanism 3 achieves rapid clamping of the test material, effectively completing the clamping of the specimen in a short time, reducing pre-test preparation time and improving test efficiency.

[0047] When using the tensile testing machine fixture in this embodiment, refer to the following steps:

[0048] 1. Start the driving mechanism 6 to drive the first protective cover 41 and the second protective cover 42 to move away from each other, thereby forming an operating space between the two protective covers;

[0049] 2. Extend the electric telescopic rods 311 of the first clamping unit 31 and the second clamping unit 32 forward to open the clamping jaws 315 of the two clamping units. Place the two ends of the material to be tested on the corresponding clamping jaws 315. Then retract the electric telescopic rods 311 of the first clamping unit 31 and the second clamping unit 32 to clamp the material to be tested on the two clamping jaws.

[0050] 3. During the test, the driving mechanism 6 is started to drive the first protective cover 41 and the second protective cover 42 to move toward each other until the two protective covers are fastened to each other to form an integral protective cover structure.

[0051] The tensile testing machine clamp in the present application, on the one hand, avoids the sudden breakage of the test material and the formation of debris during the tensile test of the test material by setting a protective cover, which may cause dangerous situations such as cutting the skin of the test personnel or even injuring the eyes, thereby greatly improving the safety of the test personnel; the clamping mechanism 3 is cleverly designed to achieve fast and stable clamping of the test material.

[0052] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0053] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all embodiments. However, obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A tensile testing machine fixture, characterized in that: include: a box body having an open upper end; A bracket is arranged above the box; The clamping mechanism is provided on the bracket and includes a first clamping unit and a second clamping unit, wherein the first clamping unit and the second clamping unit cooperate to clamp the material to be tested; The protective cover is slidably arranged on the box body and is used for covering the outside of the clamping mechanism.

2. The tensile testing machine fixture according to claim 1, characterized in that: The protective cover comprises a first protective cover and a second protective cover used in conjunction with each other, and rack plates are provided at the lower parts of the first protective cover and the second protective cover.

3. The tensile testing machine fixture according to claim 2, characterized in that: A sliding plate is provided on the upper part of the box body, and the rack plates of the first protective cover and the second protective cover can be slidably mounted on the sliding plate.

4. The tensile testing machine fixture according to claim 2, characterized in that: It also includes a driving mechanism arranged in the box body, The driving mechanism includes a motor, a first gear and a second gear, the motor is in transmission connection with the first gear, and the first gear and the second gear are meshed for transmission; The first gear is arranged below the first protective cover and meshes with the rack plate of the first protective cover, and the second gear is arranged below the second protective cover and meshes with the rack plate of the second protective cover.

5. The tensile testing machine fixture according to claim 4, characterized in that: The driving mechanism also includes a T-shaped frame and a fixing plate. The T-shaped frame is fixed to the inner bottom wall of the box body, and the first gear and the second gear are rotatably arranged on the T-shaped frame. The fixing plate is fixed on the side wall of the box body, and the motor is installed on the fixing plate.

6. The tensile testing machine fixture according to claim 1, characterized in that: The first clamping unit and the second clamping unit each include an electric telescopic rod, a push-pull column, a limit box, two sliders and two clamping claws. The cylinder of the electric telescopic rod is fixed on the bracket, the outward rod is connected to the first end of the push-pull column, the limit box is fixed on the bracket, the second end of the push-pull column passes through the limit box and can slide relative to the limit box, two connecting rods are provided between the push-pull column and the two sliders, the first end of each of the two connecting rods is rotatably connected to the second end of the push-pull column, and the second end of each of the two connecting rods is rotatably connected to a corresponding one of the sliders, the slider is limited in the limit box, and each of the sliders is connected to a clamping claw, and the clamping claw extends out of the limit box.

7. The tensile testing machine fixture according to claim 6, characterized in that: A limiting plate is provided in the limiting box, and a sliding space is formed between the limiting plate and a side plate of the limiting box close to the clamping claw. The sliding block is limited to slide in the sliding space.

8. The tensile testing machine fixture according to claim 6, characterized in that: A sliding hole is provided on the side wall of the limit box near the clamping jaws, and the two clamping jaws are connected to the slider through the sliding hole. The two clamping jaws slide along the sliding hole to move closer to and away from each other, thereby clamping and loosening the test material.

9. The tensile testing machine fixture according to claim 1, characterized in that: The bracket includes a crossbeam plate and two side plates, The two side plates are respectively connected to the two ends of the cross beam plate and are both vertically connected to the cross beam plate.

10. The tensile testing machine fixture according to claim 9, characterized in that: The protective cover is passed through the crossbeam plate, and the clamping mechanism is connected to the side plate.

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