Clamping mechanism for tension tester

Abstract

The utility model relates to the technical field of clamps, and particularly discloses a clamping mechanism for a tension tester, which comprises a screw rod and a clamping unit, the clamping unit comprises a clamping bin, two groups of mounting components, a clamping piece component, a vertical plate, studs and nuts, the two groups of mounting components are respectively and fixedly connected with the clamping bin, each group of studs is respectively and fixedly connected with the clamping bin, and the vertical plate is fixedly connected with the clamping bin. The vertical plate is arranged on one side of the clamping bin, the multiple sets of nuts are arranged, each set of nuts is in threaded connection with the corresponding stud and arranged on the outer surface wall of the corresponding stud in a sleeving mode, the two sets of clamping piece assemblies are embedded in the clamping bin, and the two sets of screws are in threaded connection with the vertical plate. According to the clamping device, a test sample can be stably clamped, and the clamping force can be continuously improved in the process of continuously applying tension, so that the clamping device cannot loosen in the clamping process, the accuracy and the stability of tension test data are improved, and the tension detection error is reduced.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, and in particular to a clamping mechanism for a tensile testing machine. Background Technology

[0002] Currently, tensile testing machines are mechanical force-applying testing devices used to perform static load, tensile, compression, bending, shear, and peel tests on materials. When conducting tensile tests on materials, clamps are needed to fix and hold the test samples. Tensile testing machine clamps are an essential component structure for the normal operation of the tensile testing machine. Different clamps are required to hold the objects depending on the materials being tested. When testing some softer materials, the smooth surface of the sample can easily cause slippage during tensile testing. Using existing tensile testing machine clamps to clamp these materials requires increasing the clamping force to hold the sample. However, these gel-like and biological samples are relatively soft and are easily damaged by excessive force.

[0003] The prior art CN116539412A provides a tensile testing machine clamp with a non-destructive clamping structure, including a clamp base, a left horizontal moving mechanism, a right horizontal moving mechanism, a left clamp, a right clamp, an air pipe, and a positive and negative pressure control system; the left and right horizontal moving mechanisms are mounted on the clamp base; the left and right horizontal moving mechanisms are opposite to each other, and the left and right clamps are respectively mounted on the opposite ends of the left and right horizontal moving mechanisms; the left horizontal moving mechanism is used to drive the left clamp to move horizontally left and right; the right horizontal moving mechanism is used to drive the right clamp to move horizontally left and right; the opposite surfaces of the left and right clamps are both flexible clamping surfaces; the interior of the left and right clamps is provided with a sealed cavity, the flexible clamping surface being part of the cavity wall, and the cavity is connected to the positive and negative pressure control system through the air pipe.

[0004] However, in the existing technology, the test material is clamped by a threaded rotation clamp, which is prone to loosening at the clamping point during the tensile test, resulting in inaccurate tensile test data. Summary of the Invention

[0005] The purpose of this utility model is to provide a clamping mechanism for a tensile testing machine, which aims to solve the technical problem in the prior art where the test material is clamped by a threaded rotation clamp, and the clamping point is prone to loosening during the tensile test, resulting in inaccurate tensile test data.

[0006] To achieve the above objectives, this utility model employs a clamping mechanism for a tensile testing machine, comprising a screw and a clamping unit. The clamping unit includes a clamping chamber, mounting components, clamping plate components, a vertical plate, studs, and nuts. The mounting components are in two sets, each fixedly connected to the clamping chamber and located on opposite sides of the chamber. The studs are in multiple sets, each fixedly connected to the clamping chamber and located on one side of the chamber. The vertical plate is disposed on one side of the clamping chamber, with multiple sets of studs penetrating it. Nuts are in multiple sets, each threadedly connected to a corresponding stud and fitted onto the outer wall of the corresponding stud. The clamping plate components are in two sets, embedded within the clamping chamber. The screws are in two sets, each threadedly connected to the vertical plate and penetrating it.

[0007] Each clamping plate assembly includes a wedge block and a clamping plate. The clamping plate is detachably connected to the wedge block by bolts and is located on one side of the wedge block. The clamping plate is embedded inside the wedge block.

[0008] Each set of mounting components includes a mounting plate and mounting ribs. The mounting plate is fixedly connected to the clamping chamber and located on one side of the clamping chamber. There are multiple sets of mounting ribs, each set of which is fixedly connected to the mounting plate and located on one side of the mounting plate.

[0009] The upright plate includes a side plate, a top plate, and supporting ribs. The top plate is fixedly connected to the side plate and is located at the upper end of the side plate. There are multiple sets of supporting ribs. Each set of supporting ribs is fixedly connected to the side plate and the top plate on both sides and is located between the side plate and the top plate.

[0010] The clamping unit further includes a rotating shaft and a pressure block. There are two sets of rotating shafts, each set of which is fixedly connected to the corresponding screw and located at the upper end of the corresponding screw. There are also two sets of pressure blocks, each set of which is rotatably connected to the corresponding screw and located at the lower end of the corresponding screw.

[0011] This utility model discloses a clamping mechanism for a tensile testing machine. The end of the sample to be tested passes through the clamping chamber, and two sets of clamping plate assemblies clamp both sides of the sample. The sample is then placed inside the clamping chamber, and the two sets of clamping plate assemblies are pressed downwards to stabilize it. Two sets of screws are rotated, causing their ends to move downwards until one end of each screw contacts and presses against the clamping plate assemblies, ensuring the stability of the clamping plate assemblies in holding the sample. The screw's limiting action prevents the clamping plate assemblies from loosening during the tensile test. During the tensile test, the friction between the sample and the two sets of clamping assemblies pulls the two sets of clamping assemblies downward. The clamping assemblies have a wedge-shaped structure, and the clamping chamber has a trapezoidal groove inside. This allows the clamping force to continuously increase as the tensile force increases during the test, thus ensuring that the sample can be stably subjected to the tensile test. The above structure can stably clamp the test sample, and the clamping force will continuously increase as the tensile force is continuously applied, preventing it from loosening during the clamping process. This improves the accuracy and stability of the tensile test data and reduces tensile test errors. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of a clamping mechanism for a tensile testing machine according to the present invention.

[0014] Figure 2 This is a side view of a clamping mechanism for a tensile testing machine according to the present invention.

[0015] Figure 3 This is the utility model Figure 2 A cross-sectional view of the internal structure along the AA line.

[0016] 101-Screw, 102-Clamping chamber, 103-Stud, 104-Nut, 105-Wedge block, 106-Clamping piece, 107-Mounting plate, 108-Mounting rib, 109-Side plate, 110-Top plate, 111-Support rib, 112-Rotating shaft, 113-Pressure block. Detailed Implementation

[0017] Please see Figures 1 to 3This utility model provides a clamping mechanism for a tensile testing machine, including a screw 101 and a clamping unit. The clamping unit includes a clamping chamber 102, mounting components, clamping plate components, a vertical plate, studs 103, and nuts 104. The mounting components are in two sets, each fixedly connected to the clamping chamber 102 and located on opposite sides of the chamber. The studs 103 are in multiple sets, each fixedly connected to the clamping chamber 102 and located on one side of the chamber. The upright plate is disposed on one side of the clamping chamber 102, and multiple sets of studs 103 penetrate the upright plate. There are multiple sets of nuts 104, each set of nuts 104 being threadedly connected to the corresponding stud 103 and respectively sleeved on the outer wall of the corresponding stud 103. There are two sets of clamping plate assemblies, which are respectively embedded inside the clamping chamber 102. There are two sets of screws 101, which are threadedly connected to the upright plate and penetrate the upright plate.

[0018] In this embodiment, the end of the sample to be tested passes through the clamping chamber 102, and two sets of clamping assemblies are used to clamp both sides of the sample. The sample is then placed inside the clamping chamber 102, and the two sets of clamping assemblies are pressed downwards to stabilize it. The two sets of screws 101 are rotated, causing their ends to move downwards until one end of each screw 101 contacts and presses against the clamping assemblies, ensuring the stability of the clamping assemblies in holding the sample. The limiting effect of the screws 101 prevents the clamping assemblies from loosening during the tensile test. Simultaneously, during the tensile test, the friction between the sample and the two sets of clamping assemblies pulls the clamping assemblies downwards. The clamping assemblies have a wedge-shaped structure, and the clamping chamber 102 has a trapezoidal groove inside, so that the clamping force continuously increases as the tensile force increases during the test, thus ensuring stable tensile testing of the sample.

[0019] Furthermore, each set of clamping plate assemblies includes a wedge block 105 and a clamping plate 106. The clamping plate 106 is detachably connected to the wedge block 105 by bolts and is located on one side of the wedge block 105. The clamping plate 106 is embedded in the inner side of the wedge block 105.

[0020] In this embodiment, the wedge blocks 105 are used so that the two sets of wedge blocks 105 will be continuously clamped during the tensile test. The clamping plates 106 can be replaced according to the different materials of the test samples, making it suitable for tensile testing of different materials and improving the flexibility and diversity of the test.

[0021] Furthermore, each set of the mounting components includes a mounting plate 107 and a mounting rib 108. The mounting plate 107 is fixedly connected to the clamping chamber 102 and is located on one side of the clamping chamber 102. There are multiple sets of mounting ribs 108, and each set of mounting ribs 108 is fixedly connected to the mounting plate 107 and is located on one side of the mounting plate 107.

[0022] In this embodiment, the mounting plate 107 is used to install and fix the clamping chamber 102, and the mounting rib 108 improves the support strength of the mounting plate 107 to ensure that it is not prone to large deformation during the tensile test, thereby affecting the data content of the tensile test.

[0023] Furthermore, the upright plate includes a side plate 109, a top plate 110, and supporting ribs 111. The top plate 110 is fixedly connected to the side plate 109 and is located at the upper end of the side plate 109. There are multiple sets of supporting ribs 111. Each set of supporting ribs 111 is fixedly connected to the side plate 109 and the top plate 110 on both sides and is located between the side plate 109 and the top plate 110.

[0024] In this embodiment, the side plate 109 supports and fixes the top plate 110, the top plate 110 is used to install the screw 101, and the support rib 111 is used to improve the connection strength between the side plate 109 and the top plate 110.

[0025] Furthermore, the clamping unit also includes a rotating shaft 112 and a pressure block 113. There are two sets of rotating shafts 112, each set of rotating shafts 112 is fixedly connected to the corresponding screw 101 and is located at the upper end of the corresponding screw 101. There are two sets of pressure blocks 113, each set of pressure blocks 113 is rotatably connected to the corresponding screw 101 and is located at the lower end of the corresponding screw 101.

[0026] In this embodiment, the rotating shaft 112 facilitates the rotational adjustment of the screw 101. At the same time, the pressure block 113 contacts the clamping plate assembly under the control of the screw 101 and supports the clamping plate assembly, which can avoid hard contact between the screw 101 and the clamping plate assembly and prevent damage or deformation of the clamping plate assembly.

[0027] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A clamping mechanism for a tensile testing machine, comprising a screw, characterized in that, It also includes a clamping unit; The clamping unit includes a clamping chamber, mounting components, clamping plate components, a vertical plate, studs, and nuts. There are two sets of mounting components, each fixedly connected to the clamping chamber and located on opposite sides of the chamber. There are multiple sets of studs, each fixedly connected to the clamping chamber and located on one side of the chamber. The vertical plate is positioned on one side of the clamping chamber, with multiple sets of studs penetrating it. There are multiple sets of nuts, each threadedly connected to a corresponding stud and fitted onto its outer surface. There are two sets of clamping plate components, each embedded within the clamping chamber. There are two sets of screws, each threadedly connected to the vertical plate and penetrating it.

2. The clamping mechanism for a tensile testing machine as described in claim 1, characterized in that, Each clamping plate assembly includes a wedge block and a clamping plate. The clamping plate is detachably connected to the wedge block by bolts and is located on one side of the wedge block, with the clamping plate embedded inside the wedge block.

3. The clamping mechanism for a tensile testing machine as described in claim 1, characterized in that, Each set of the mounting components includes a mounting plate and mounting ribs. The mounting plate is fixedly connected to the clamping chamber and located on one side of the clamping chamber. There are multiple sets of mounting ribs, and each set of mounting ribs is fixedly connected to the mounting plate and located on one side of the mounting plate.

4. The clamping mechanism for a tensile testing machine as described in claim 1, characterized in that, The upright plate includes a side plate, a top plate, and supporting ribs. The top plate is fixedly connected to the side plate and is located at the upper end of the side plate. There are multiple sets of supporting ribs. Each set of supporting ribs is fixedly connected to the side plate and the top plate on both sides and is located between the side plate and the top plate.

5. The clamping mechanism for a tensile testing machine as described in claim 1, characterized in that, The clamping unit further includes a rotating shaft and a pressure block. There are two sets of rotating shafts, each set of which is fixedly connected to the corresponding screw and located at the upper end of the corresponding screw. There are also two sets of pressure blocks, each set of which is rotatably connected to the corresponding screw and located at the lower end of the corresponding screw.

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