Bidirectional electronic universal testing machine

Abstract

The utility model provides a bidirectional electronic universal testing machine which comprises a machine frame, two positive and negative tooth lead screws arranged on the machine frame in a synchronous rotation mode, a first bearing plate connected with positive teeth of the two positive and negative tooth lead screws, a second bearing plate connected with negative teeth of the two positive and negative tooth lead screws, clamping assemblies arranged on the first bearing plate and the second bearing plate, and clamping assemblies arranged on the first bearing plate and the second bearing plate. The two clamping assemblies move oppositely; two guide rods are arranged on the machine frame and are parallel to the positive and negative tooth lead screw, the first bearing plate and the second bearing plate penetrate through the guide rods in a sliding mode respectively, and the guide rods and the positive and negative tooth lead screw are arranged on the two sides of the clamping assembly respectively. According to the bidirectional electronic universal testing machine provided by the utility model, the two clamping assemblies move oppositely through the positive and negative tooth lead screws which operate synchronously, so that a test when two ends of a test workpiece are stretched or compressed synchronously is realized, and the movement of the clamping assemblies is more stable through the arrangement of the guide rods; and the operation of the testing machine is more stable and accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a bidirectional electronic universal testing machine. Background Art

[0002] The universal testing machine is suitable for testing the tensile, compression and other mechanical properties of metals, rubbers, plastics, composite materials, fibers, wires and cables, paper, tapes and other materials, and automatically obtains the tensile strength, yield strength, elongation and other parameters of the test structure. When the unidirectional universal testing machine performs a tensile test on a larger workpiece, two fixtures are installed on the universal testing machine body, one end of the workpiece is installed on the fixture at the fixed end of the testing machine, and then the other end of the workpiece is installed on the fixture at the movable end. The workpiece is stretched through the movement of the fixture at the movable end to measure the tensile strength of the workpiece.

[0003] However, the existing unidirectional universal testing machine can only test the workpiece by moving one end during the tensile test, and cannot test when both ends of the workpiece are simultaneously stretched or compressed. The universal testing machine is not very applicable. This solution solves this technical problem. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a bidirectional electronic universal testing machine, which not only makes the test more stable when both ends of the workpiece are simultaneously stretched or compressed, but also realizes the conversion between the tensile test and the compression test by swapping the clamping jaws and the bearing block. The universal testing machine is convenient and quick to use and has stronger applicability.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a bidirectional electronic universal testing machine, comprising a frame, and also comprising two positive and negative threaded screws synchronously rotated on the frame, a bearing plate 1 connected to the positive threads of the two positive and negative threaded screws, and a bearing plate 2 connected to the negative threads of the two positive and negative threaded screws, wherein the bearing plate 1 and the bearing plate 2 are both provided with clamping assemblies, and the two clamping assemblies move in opposite directions;

[0006] Two guide rods are arranged on the frame, and both guide rods are parallel to the forward and reverse screws. The first bearing plate and the second bearing plate slide through the guide rods respectively, and the guide rods and the forward and reverse screws are respectively arranged on both sides of the clamping assembly.

[0007] Support platforms are provided on both the first and second load-bearing plates, and the clamping assembly includes a clamping jaw for a tensile test and a load-bearing block for a compression test. The clamping jaw and the load-bearing block can be interchangeably arranged on the support platform, one end of the load-bearing block is connected to one end of the clamping jaw, and a fastening unit is provided on the support platform, and the other end of the load-bearing block and the other end of the clamping jaw are respectively detachably connected to the fastening unit.

[0008] The clamping claw comprises two claw bodies which are slidably arranged at one end of the bearing block in opposite directions. The sides of the two claw bodies are provided with V-shaped grooves. The two ends of the support platform are respectively provided with oblique support parts which are pressed tightly into the V-shaped grooves.

[0009] The fastening unit comprises a screw connected to the support platform, and a nut block sleeved on the screw, wherein an inner side of one end of the nut block is provided with an internal thread 1, and the nut block is connected to the screw through the internal thread 1, and a positioning groove is provided on the edge of one end of the nut block, and the nut block abuts against the bearing block through the positioning groove;

[0010] The inner side of the other end of the nut block is provided with a second internal thread, and the outer sides of the two claw bodies are both provided with an external thread, and the nut block is connected with the external thread of the claw body through the second internal thread.

[0011] One end of each of the two forward and reverse screws is provided with a pulley 1, and a synchronous belt 1 is tensioned between the two pulleys 1. One end of one of the forward and reverse screws is provided with a pulley 2. A motor is provided on the frame, and the motor shaft of the motor is connected to a pulley 3, and a synchronous belt 2 is tensioned between the pulley 3 and the pulley 2.

[0012] A wedge-shaped portion is provided at one end of the bearing block, a wedge-shaped groove is provided at one end of the claw body, the claw body is slidably arranged in the wedge-shaped portion of the bearing block through the wedge-shaped groove, a stopper is provided in the middle of the wedge-shaped portion, and a limiting groove abutting against the stopper is provided in the wedge-shaped groove.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] (1) The two clamping assemblies move in opposite directions through the synchronously running forward and reverse screws, realizing the test when both ends of the test workpiece are simultaneously stretched or compressed. The setting of the guide rod makes the movement of the clamping assembly more stable, thereby making the operation of the testing machine more stable and accurate;

[0015] (2) The clamping assembly can switch between tensile test and compression test by swapping the clamping jaws and the load-bearing block. Various tests can be completed without replacing the new clamping assembly. The installation of the clamping assembly is convenient and quick, and the clamping and support of the workpiece are more stable and reliable. The universal testing machine is convenient and quick to use and has stronger applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a partial structural schematic diagram of the utility model.

[0018] Figure 3 It is a schematic diagram of the structural decomposition of the clamping assembly of the utility model.

[0019] Figure 4 It is a structural schematic diagram of the claw body of the utility model.

[0020] Figure 5 It is a structural schematic diagram of a nut block of the utility model.

[0021] Figure 6 It is a structural schematic diagram of the clamping assembly during the tensile test of the utility model.

[0022] Figure 7 It is a structural schematic diagram of the clamping assembly during the compression test of the utility model.

[0023] Among them, in the figure: 1, frame; 2, positive and negative threaded screw; 21, bearing plate 1; 22, bearing plate 2; 23, pulley 1; 24, synchronous belt 1; 25, pulley 2; 3, clamping assembly; 31, clamping claw; 311, claw body; 312, V-shaped groove; 313, wedge-shaped groove; 3131, limiting groove; 32, bearing block; 321, wedge-shaped part; 3211, stopper; 33, fastening unit; 331, screw; 332, nut block; 3321, internal thread 1; 3322, positioning groove; 3323, internal thread 2; 4, guide rod; 5, support platform; 51, diagonal support part; 6, motor; 61, pulley 3; 62, synchronous belt 2. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0025] See also Figure 1-Figure 7 A bidirectional electronic universal testing machine comprises a frame 1, and also comprises two positive and negative thread screws 2 synchronously rotated on the frame 1, a bearing plate 1 21 connected with the positive threads of the two positive and negative thread screws 2, and a bearing plate 2 22 connected with the negative threads of the two positive and negative thread screws 2, and a clamping assembly 3 is arranged on the bearing plate 1 21 and the bearing plate 2 22, and the two clamping assemblies 3 move in opposite directions;

[0026] Two guide rods 4 are arranged on the frame 1, and both guide rods 4 are parallel to the forward and reverse screws 2. The bearing plate 1 21 and the bearing plate 2 22 slide through the guide rods 4 respectively, and the guide rods 4 and the forward and reverse screws 2 are respectively arranged on both sides of the clamping assembly 3.

[0027] A support platform 5 is provided on both the load-bearing plate 1 21 and the load-bearing plate 2 22. The clamping assembly 3 includes a clamping jaw 31 for a tensile test and a load-bearing block 32 for a compression test. The clamping jaw 31 and the load-bearing block 32 can be interchangeably arranged on the support platform 5. One end of the load-bearing block 32 is connected to one end of the clamping jaw 31. A fastening unit 33 is provided on the support platform 5. The other end of the load-bearing block 32 and the other end of the clamping jaw 31 are respectively detachably connected to the fastening unit 33.

[0028] The clamping jaw 31 includes two claw bodies 311 slidably disposed at one end of the bearing block 32 . The sides of the two claw bodies 311 are provided with V-shaped grooves 312 . The two ends of the support platform 5 are respectively provided with diagonal support parts 51 pressed tightly in the V-shaped grooves 312 .

[0029] The fastening unit 33 includes a screw rod 331 connected to the support platform 5, and a nut block 332 sleeved on the screw rod 331. An inner side of one end of the nut block 332 is provided with an internal thread 3321. The nut block 332 is connected to the screw rod 331 through the internal thread 3321. A positioning groove 3322 is provided on the edge of one end of the nut block 332. The nut block 332 abuts against the bearing block 32 through the positioning groove 3322.

[0030] The other end of the nut block 332 is provided with an internal thread 3323 on its inner side, and the outer sides of the two claw bodies 311 are provided with external threads. The nut block 332 is connected to the external threads of the claw bodies 311 via the internal thread 3323 .

[0031] A pulley 23 is provided at one end of each of the two forward and reverse threaded screws 2, and a synchronous belt 24 is tensioned between the two pulleys 23. A pulley 25 is provided at one end of one of the forward and reverse threaded screws 2. A motor 6 is provided on the frame 1. A pulley 3 61 is connected to the motor 6 shaft of the motor 6, and a synchronous belt 2 62 is tensioned between the pulley 3 61 and the pulley 2 25.

[0032] A wedge-shaped portion 321 is provided at one end of the supporting block 32, and a wedge-shaped groove 313 is provided at one end of the claw body 311. The claw body 311 is slidably set in the wedge-shaped portion 321 of the supporting block 32 through the wedge-shaped groove 313. A stopper 3211 is provided in the middle of the wedge-shaped portion 321, and a limiting groove 3131 abutting against the stopper 3211 is provided in the wedge-shaped groove 313 to prevent the claw body 311 from falling off the supporting block 32 during the compression test of the workpiece.

[0033] The motor 6 is connected to a control device, which is connected to an output device. The control device detects the operating status of the motor 6, and outputs the experimental process and parameters through the output device. The control device and the output device are directly implemented using existing technologies and will not be described in detail here.

[0034] The specific working process of this utility model:

[0035] See also Figure 3 , the two claws 311 of the clamping jaw 31 are slidably arranged on the wedge-shaped portion 321 of the bearing block 32, so that the clamping jaw 31 is combined with the bearing block 32. When the tensile test is performed, the bearing block 32 is arranged toward the side of the fastening unit 33, and the clamping jaw 31 is inserted between the two oblique support portions 51 of the support platform 5 through the V-shaped groove 312. At this time, the bearing block 32 falls into the positioning groove 3322 of the nut block 332. For the specific state of the clamping assembly 3, see Figure 6 , separate the two claw bodies 311, place the workpiece between the two claw bodies 311, and then screw the nut block 332, the nut block 332 rotates along the screw rod 331, so that the nut block 332 drives the bearing block 32 to move upward, and the bearing block 32 drives the claw body 311 to move upward. Under the constraint of the diagonal support part 51 on the V-shaped groove 312, the two claw bodies 311 are close together to clamp one end of the workpiece, and the other end of the workpiece is also clamped by another clamping assembly 3. After the workpiece is clamped, a tensile test can be performed. The clamping jaws 31 are constrained by the diagonal support part 51 and the nut block 332, and the clamping of the workpiece is convenient and reliable.

[0036] When a compression test is required for the workpiece, the nut block 332 is loosened, the clamping jaw 31 is removed from the diagonal support portion 51 of the support platform 5, and then the two claws 311 of the clamping jaw 31 are brought together so that the limiting groove 3131 of the claw body 311 contacts the stopper 3211 of the bearing block 32. At this time, the bearing block 32 and the clamping jaw 31 are on the same axis. Then the claw body 311 is inserted into the diagonal support portion 51 of the support platform 5 through the V-shaped groove 312, so that the clamping jaw 31 is set toward the nut block 332, and the nut block 332 is screwed. The nut block 332 is connected to the external thread of the clamping jaw 31 through the internal thread 3323, and the nut block 332 is tightened, so that the clamping jaw 31 is fixed through the diagonal support portion 51 and the nut block 332. For the specific state of the clamping assembly 3, see Figure 7 At this time, the workpiece is placed on the supporting block 32, and then the workpiece is subjected to a compression test through the supporting block 32 of another clamping assembly 3. It should be noted that the pitch of the second internal thread 3323 is greater than the pitch of the first internal thread 3321, so that when the nut block 332 is screwed, the speed at which the clamp 31 enters the nut block 332 is greater than the speed at which the screw rod 331 screws out of the nut block 332, thereby achieving the effect of tightening the clamp 31.

[0037] The two clamping assemblies 3 move in opposite directions through the synchronously running forward and reverse threaded screws 2, so as to realize the test when both ends of the test workpiece are synchronously stretched or compressed. The setting of the guide rod 4 makes the movement of the clamping assembly 3 more stable, thereby making the operation of the testing machine more stable and accurate.

[0038] The clamping assembly 3 realizes the conversion between the tensile test and the compression test by swapping the clamping jaws 31 and the bearing block 32. Various tests can be completed without replacing a new clamping assembly 3. The installation of the clamping assembly 3 is convenient and quick, and the clamping and support of the workpiece are more stable and reliable. The universal testing machine is convenient and quick to use and has stronger applicability.

[0039] Technical features not described in the present invention can be achieved through or by adopting existing technologies, and will not be elaborated here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A bidirectional electronic universal testing machine, comprising a frame (1), characterized in that: It also includes two positive and negative threaded screws (2) which are synchronously rotated and arranged on the frame (1), a first bearing plate (21) connected to the positive threads of the two positive and negative threaded screws (2), and a second bearing plate (22) connected to the negative threads of the two positive and negative threaded screws (2), wherein the first bearing plate (21) and the second bearing plate (22) are both provided with clamping assemblies (3), and the two clamping assemblies (3) move in opposite directions; Two guide rods (4) are arranged on the frame (1), and the two guide rods (4) are parallel to the forward and reverse threaded screws (2). The first bearing plate (21) and the second bearing plate (22) are respectively slidably passed through the guide rods (4). The guide rods (4) and the forward and reverse threaded screws (2) are respectively arranged on two sides of the clamping assembly (3).

2. The bidirectional electronic universal testing machine according to claim 1, characterized in that: A support platform (5) is provided on both the first bearing plate (21) and the second bearing plate (22); the clamping assembly (3) comprises a clamping jaw (31) for a tensile test and a bearing block (32) for a compression test; the clamping jaw (31) and the bearing block (32) are interchangeably arranged on the support platform (5); one end of the bearing block (32) is connected to one end of the clamping jaw (31); a fastening unit (33) is provided on the support platform (5); the other end of the bearing block (32) and the other end of the clamping jaw (31) are respectively detachably connected to the fastening unit (33).

3. The bidirectional electronic universal testing machine according to claim 2, characterized in that: The clamping claw (31) comprises two claw bodies (311) slidably disposed in opposite directions at one end of the bearing block (32), the sides of the two claw bodies (311) being provided with V-shaped grooves (312), and the two ends of the support platform (5) are respectively provided with diagonal support portions (51) pressed tightly into the V-shaped grooves (312).

4. The bidirectional electronic universal testing machine according to claim 3, characterized in that: The fastening unit (33) comprises a screw rod (331) connected to the support platform (5), and a nut block (332) sleeved on the screw rod (331); an inner side of one end of the nut block (332) is provided with an internal thread (3321); the nut block (332) is connected to the screw rod (331) via the internal thread (3321); a positioning groove (3322) is provided on the edge of one end of the nut block (332); the nut block (332) abuts against the bearing block (32) via the positioning groove (3322); The other end of the nut block (332) is provided with a second internal thread (3323) on the inner side, and the outer sides of the two claw bodies (311) are provided with external threads, and the nut block (332) is connected to the external threads of the claw bodies (311) via the second internal thread (3323).

5. The bidirectional electronic universal testing machine according to claim 2, characterized in that: One end of each of the two forward and reverse threaded screws (2) is provided with a pulley one (23), a synchronous belt one (24) is tensioned between the two pulleys one (23), one end of one of the forward and reverse threaded screws (2) is provided with a pulley two (25), a motor (6) is provided on the frame (1), a motor (6) shaft of the motor (6) is connected to a pulley three (61), and a synchronous belt two (62) is tensioned between the pulley three (61) and the pulley two (25).

6. The bidirectional electronic universal testing machine according to claim 3, characterized in that: A wedge-shaped portion (321) is provided at one end of the bearing block (32), a wedge-shaped groove (313) is provided at one end of the claw body (311), the claw body (311) is slidably arranged in the wedge-shaped portion (321) of the bearing block (32) through the wedge-shaped groove (313), a stopper (3211) is provided in the middle of the wedge-shaped portion (321), and a limiting groove (3131) abutting against the stopper (3211) is provided in the wedge-shaped groove (313).

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