Clamping mechanism of tensile testing machine

Abstract

The utility model discloses a tensile testing machine clamping mechanism, which relates to the technical field of tensile testing equipment, and comprises a tensile testing machine body, the upper end of the tensile testing machine body is provided with an upper plate and a lower plate, the lower end of the upper plate is fixedly connected with an upper moving assembly, and the lower end of the upper moving assembly is provided with an upper clamping arm; by arranging the upper clamping arms, the upper clamping arms adopt two-section type design, two-section type clamping can be carried out, a tensile test sample is placed between the two upper clamping arms and corresponds to the clamping seat during fixing through the arranged worm gear and worm, the first motor is started to drive the clamping seat to clamp the tensile test sample, the second motor is started to drive the worm to rotate, and the clamping seat is driven to clamp the tensile test sample. The worm drives the worm gear in meshed connection to rotate, so that the pressing arm is driven to rotate with the rotating shaft as the axis, inward force is applied to the clamping jaw, the clamping jaw is driven to secondarily clamp a tensile test sample, the driving mode of the worm and the worm gear has an anti-return effect, and the clamping stability is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of tensile testing equipment, in particular to a clamping mechanism for a tensile testing machine. Background Art

[0002] The tensile testing machine is a device used to measure the mechanical properties of materials during the tensile process. It is a commonly used instrument in material mechanical property testing and is widely used in industrial production, scientific research laboratories, quality inspection and other fields.

[0003] China Utility Model Patent Publication No.: CN 217765802 U, discloses: a clamping mechanism for a tensile testing machine, the clamping mechanism for the tensile testing machine, by setting a threaded rod to cooperate with a movable block, when the user turns the knob, the threaded rod can be driven to rotate, when the threaded rod rotates, it will drive the two movable blocks to move inward or outward at the same time, so that the movable block moving inward can clamp the test object such as the metal plate, which is convenient for the user to stretch. However, the clamping mechanism of the testing machine drives the movable block to clamp by manually rotating the threaded rod, and the clamping effect is limited, and it consumes manpower. Utility Model Content

[0004] The purpose of the utility model is to provide a clamping mechanism for a tensile testing machine, which can solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a clamping mechanism of a tensile testing machine, comprising a tensile testing machine body, an upper plate and a lower plate are arranged at the upper end of the tensile testing machine body, an upper movable assembly is fixedly connected to the lower end of the upper plate, an upper clamping arm is arranged at the lower end of the upper movable assembly, and a lower movable assembly is fixedly connected to the upper end of the lower plate, and a lower clamping arm is arranged at the upper end of the lower movable assembly.

[0006] Preferably, the upper movable assembly includes an axle seat, a sliding rod, a bidirectional threaded screw and a motor 1, the center of the axle seat is fixedly connected to the sliding rod, the center of the axle seat is rotatably connected to the bidirectional threaded screw, and the right end of the axle seat is fixedly connected to the motor 1.

[0007] Preferably, the output end of the motor 1 is fixedly connected with a bidirectional threaded screw, and the structures of the upper moving component and the lower moving component are symmetrical and identical.

[0008] Preferably, the upper clamping arm includes a clamping seat, a groove, a clamping claw, a long groove, anti-slip teeth, a mounting seat, a worm, a second motor, a fixed seat, a rotating shaft, a worm gear and a pressure arm. The front and rear ends of the clamping seat are provided with grooves, the lower end of the clamping seat is rotatably connected to the clamping claw, the outer side of the clamping claw is provided with a long groove, the inner side of the clamping seat is fixedly connected with anti-slip teeth, the outer side of the clamping seat is fixedly connected with the mounting seat, the mounting seat is rotatably connected to the worm gear, the lower end of the mounting seat is fixedly connected with the second motor, the outer side of the clamping seat is fixedly connected with the fixed seat, the center of the fixed seat is rotatably connected to the rotating shaft, the outer side of the rotating shaft is fixedly connected with the worm gear, and the outer side of the rotating shaft is fixedly connected with the pressure arm.

[0009] Preferably, the bidirectional threaded screw is threadedly connected to the clamp seat, and the groove is adapted to the sliding rod.

[0010] Preferably, the worm wheel is meshingly connected with the worm, and the long groove is matched with the pressure arm.

[0011] Preferably, anti-slip teeth are provided on the inner sides of the clamp seat and the clamp claw, and the structures of the lower clamp arm and the upper clamp arm are symmetrical and identical.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model provides an upper clamping arm with a two-stage design, which can perform two-stage clamping to prevent the tensile test sample from falling off. The bidirectional threaded screw is provided, and the driving mode of the screw has a self-locking characteristic and a good limiting effect. The worm wheel and the worm are provided, and the tensile test sample is placed between the two upper clamping arms when fixed, corresponding to the clamping seat, and the first starting motor drives the clamping seat to clamp the tensile test sample. The second starting motor drives the worm to rotate, and the worm drives the meshing worm wheel to rotate, thereby driving the pressure arm to rotate with the rotating shaft as the axis, applying an inward force to the clamping claw, and driving the clamping claw to clamp the tensile test sample for a second time. The driving mode of the worm and the worm wheel has an anti-return effect, thereby ensuring the clamping stability. The motor is used as a power component of the clamping mechanism, which saves manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0015] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0016] Figure 3 It is a schematic diagram of the enlarged structure of the upper moving assembly and the upper clamping arm of the utility model;

[0017] Figure 4 This is a schematic diagram of the disassembly structure of the upper moving assembly and the upper clamping arm of the utility model;

[0018] Figure 5 The utility model upper clamp arm split structure schematic diagram Figure 1 ;

[0019] Figure 6 The utility model upper clamp arm split structure schematic diagram Figure 2 .

[0020] Wherein: 1. tensile testing machine body; 2. upper plate; 3. upper moving assembly; 301. shaft seat; 302. slide rod; 303. bidirectional threaded screw; 304. motor one; 4. upper clamping arm; 401. clamping seat; 402. groove; 403. clamping claw; 404. long groove; 405. anti-slip teeth; 406. mounting seat; 407. worm; 408. motor two; 409. fixed seat; 410. rotating shaft; 411. worm gear; 412. pressing arm; 5. lower plate; 6. lower moving assembly; 7. lower clamping arm. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1

[0023] See also Figure 1-4 The figure shows a clamping mechanism of a tensile testing machine, including a tensile testing machine body 1, an upper plate 2 and a lower plate 5 are arranged at the upper end of the tensile testing machine body 1, an upper moving component 3 is fixedly connected to the lower end of the upper plate 2, an upper clamping arm 4 is arranged at the lower end of the upper moving component 3, a lower moving component 6 is fixedly connected to the upper end of the lower plate 5, and a lower clamping arm 7 is arranged at the upper end of the lower moving component 6.

[0024] See also Figure 1-6 In the figure, the upper moving component 3 includes a shaft seat 301, a slide rod 302, a bidirectional threaded screw 303 and a motor 304. The center of the shaft seat 301 is fixedly connected to the slide rod 302, the center of the shaft seat 301 is rotatably connected to the bidirectional threaded screw 303, and the right end of the shaft seat 301 is fixedly connected to the motor 304.

[0025] In this embodiment: the upper moving assembly 3 is provided to drive the upper clamping arm 4 to move and clamp the sample for the tensile test.

[0026] Working principle: When in use, place the tensile test sample between the two upper clamping arms 4, corresponding to the clamping seat 401, start the motor 1 304 to drive the bidirectional threaded screw 303 to rotate, drive the two upper clamping arms 4 to move toward each other along the sliding rod 302, and clamp the tensile test sample, start the motor 2 408 to drive the worm 407 to rotate, and the worm 407 drives the meshing worm wheel 411 to rotate, thereby driving the pressure arm 412 to rotate with the rotating shaft 410 as the axis, applying an inward force to the clamping jaws 403, and driving the clamping jaws 403 to clamp the tensile test sample for the second time. The driving methods of the worm 407, the worm wheel 411 and the bidirectional threaded screw 303 all have an anti-return effect to ensure the clamping stability.

[0027] Example 2

[0028] See also Figure 1-6 This embodiment further illustrates Example 1. In the figure, the output end of the motor 1 304 is fixedly connected with a bidirectional threaded screw 303, and the structures of the upper moving component 3 and the lower moving component 6 are symmetrical and identical.

[0029] In this embodiment, the motor 304 is set to start and drive the bidirectional threaded screw 303 to rotate, thereby driving the two upper clamping arms 4 to move toward each other, and the sliding rod 302 ensures the stable movement of the upper clamping arms 4.

[0030] See also Figure 3-6 In the figure, the upper clamp arm 4 includes a clamp seat 401, a groove 402, a clamping claw 403, a long groove 404, an anti-slip tooth 405, a mounting seat 406, a worm 407, a motor 408, a fixing seat 409, a rotating shaft 410, a worm gear 411 and a pressing arm 412. The front and rear ends of the clamp seat 401 are provided with grooves 402, the lower end of the clamp seat 401 is rotatably connected to the clamping claw 403, the outer side of the clamping claw 403 is provided with a long groove 404, and the inner side of the clamp seat 401 is provided with a groove 402. The side is fixedly connected with anti-slip teeth 405, the outer side of the clamping seat 401 is fixedly connected with a mounting seat 406, the mounting seat 406 is rotatably connected to a worm 407, the lower end of the mounting seat 406 is fixedly connected to a motor 2 408, the outer side of the clamping seat 401 is fixedly connected with a fixing seat 409, the center of the fixing seat 409 is rotatably connected to a rotating shaft 410, the outer side of the rotating shaft 410 is fixedly connected with a worm gear 411, and the outer side of the rotating shaft 410 is fixedly connected with a pressure arm 412.

[0031] In this embodiment, the upper clamping arm 4 is provided, and the upper clamping arm 4 adopts a two-stage design, which can perform two-stage clamping to prevent the tensile test sample from falling off.

[0032] See also Figure 3-6 In the figure, the bidirectional threaded screw 303 is threadedly connected to the clamp seat 401, and the groove 402 is adapted to the slide rod 302.

[0033] In this embodiment, by providing a bidirectional threaded screw 303, the driving mode of the screw has a self-locking characteristic and a good limiting effect.

[0034] See also Figure 3-6 In the figure, the worm wheel 411 is meshed with the worm 407 , and the long slot 404 is matched with the pressure arm 412 .

[0035] In this embodiment: by setting the worm wheel 411 and the worm 407, the tensile test sample is placed between the two upper clamping arms 4, corresponding to the clamping seat 401, and the motor 1 304 is started to drive the clamping seat 401 to clamp the tensile test sample, and the motor 2 408 is started to drive the worm 407 to rotate, and the worm 407 drives the meshing worm wheel 411 to rotate, thereby driving the pressure arm 412 to rotate with the rotating shaft 410 as the axis, applying an inward force to the clamping jaw 403, and driving the clamping jaw 403 to clamp the tensile test sample for the second time. The driving method of the worm 407 and the worm wheel 411 has an anti-return effect to ensure the clamping stability.

[0036] See also Figure 3-6 In the figure, the inner sides of the clamping seat 401 and the clamping claw 403 are both provided with anti-slip teeth 405, and the structures of the lower clamping arm 7 and the upper clamping arm 4 are symmetrical and the same.

[0037] In this embodiment, the anti-slip teeth 405 are provided to increase the friction force in contact with the tensile test sample and improve the clamping effect.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used 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 "include"-"comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process-method-article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process-method-article or device.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A clamping mechanism for a tensile testing machine, comprising a tensile testing machine body (1), characterized in that: The upper end of the tensile testing machine body (1) is provided with an upper plate (2) and a lower plate (5), the lower end of the upper plate (2) is fixedly connected to an upper moving assembly (3), the lower end of the upper moving assembly (3) is provided with an upper clamping arm (4), the upper end of the lower plate (5) is fixedly connected to a lower moving assembly (6), the upper end of the lower moving assembly (6) is provided with a lower clamping arm (7), the upper clamping arm (4) comprises a clamping seat (401), a groove (402), a clamping claw (403), a long groove (404), an anti-slip tooth (405), a mounting seat (406), a worm (407), a second motor (408), a fixing seat (409), a rotating shaft (410), a worm wheel (411) and a pressing arm (412), the front and rear ends of the clamping seat (401) are provided with grooves ( 402), the lower end of the clamping seat (401) is rotatably connected to the clamping claw (403), the outer side of the clamping claw (403) is provided with a long groove (404), the inner side of the clamping seat (401) is fixedly connected to an anti-slip tooth (405), the outer side of the clamping seat (401) is fixedly connected to a mounting seat (406), the mounting seat (406) is rotatably connected to a worm gear (407), the lower end of the mounting seat (406) is fixedly connected to a motor 2 (408), the outer side of the clamping seat (401) is fixedly connected to a fixing seat (409), the center of the fixing seat (409) is rotatably connected to a rotating shaft (410), the outer side of the rotating shaft (410) is fixedly connected to a worm gear (411), and the outer side of the rotating shaft (410) is fixedly connected to a pressure arm (412).

2. A clamping mechanism for a tensile testing machine according to claim 1, characterized in that: The upper moving assembly (3) comprises an axle seat (301), a sliding rod (302), a bidirectional threaded screw (303) and a motor (304); the center of the axle seat (301) is fixedly connected to the sliding rod (302); the center of the axle seat (301) is rotatably connected to the bidirectional threaded screw (303); and the right end of the axle seat (301) is fixedly connected to the motor (304).

3. A clamping mechanism for a tensile testing machine according to claim 2, characterized in that: The output end of the motor 1 (304) is fixedly connected to a bidirectional threaded screw (303), and the structures of the upper moving component (3) and the lower moving component (6) are symmetrical and identical.

4. A clamping mechanism for a tensile testing machine according to claim 3, characterized in that: The bidirectional threaded screw rod (303) is threadedly connected to the clamping seat (401), and the groove (402) is adapted to the sliding rod (302).

5. The clamping mechanism of a tensile testing machine according to claim 1, characterized in that: The worm wheel (411) is meshedly connected with the worm (407), and the long slot (404) is matched with the pressure arm (412).

6. The clamping mechanism of a tensile testing machine according to claim 1, characterized in that: The inner sides of the clamping seat (401) and the clamping claw (403) are both provided with anti-slip teeth (405), and the structures of the lower clamping arm (7) and the upper clamping arm (4) are symmetrical and identical.

Images