Double-screw tension tester

Abstract

The utility model relates to the technical field of tension testing machines, and discloses a double-screw tension testing machine which comprises a rack, the rack is provided with a top plate, a bottom plate, a first rotating rod and a second rotating rod, the first rotating rod and the second rotating rod are provided with a first thread part and a second thread part, and a first clamp and a second clamp are arranged in the rack. First connecting sleeves are arranged at the two ends of the first clamp, second connecting sleeves are arranged at the two ends of the second clamp, and the first clamp and the second clamp are each provided with a clamping plate a and a clamping plate b. A driving device is arranged at the top of the rack and can trend the first rotating rod to rotate, so that the first clamp and the second clamp move; the plastic tensile force testing device has the advantages that 1, the first clamp and the second clamp have longer lengths, so that the tensile force of various plastics can be tested, and the application range is wide; 2, the first rotating rod and the second rotating rod rotate synchronously, the tension tester can operate stably only by a single driving device, the structure is simple, and the manufacturing cost is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to tension testing machine technical field especially relates to a double screw tension testing machine. BACKGROUND

[0002] The universal testing machine is the mechanical force testing machine for mechanical property test, is applicable to the various physical mechanical property test of plastic material, is indispensable detection equipment for material development, physical property test, teaching research, quality control etc., the most important part of the usual tension machine includes drive, detection, fixture and the like equipment, the fixture is an important component of the tension testing machine, different materials need different fixtures, and an important factor of the test result accuracy is high or low, the existing tension testing machine usually needs to replace the corresponding fixture according to the shape of plastic when carrying out the tension test to different shape plastic materials, for example, the tension testing machine disclosed in this patent CN209589668U, this kind of tension testing machine not only needs to frequently replace and adjust the fixture, but also the lower fixture is usually fixed, in order to improve the strength of the lower fixture, the tension testing machine base volume is usually larger, and it is inconvenient to use, in view of this, the inventor has made new invention. SUMMARY

[0003] The utility model discloses to aim at the deficiency of prior art, provide a double screw tension testing machine, it has the advantages such as small volume, high applicability.

[0004] To achieve the above object, the utility model discloses a double screw tension testing machine, including the frame, the frame is provided with top plate and bottom plate, is provided with the support plate between top plate and bottom plate, the both ends of top plate are provided with positioning hole a and positioning hole b, and the bottom plate is provided with the positioning hole c and positioning hole d with positioning hole a, positioning hole b position correspondence, be provided with first rotating lever between positioning hole a and positioning hole c, be provided with second rotating lever between positioning hole b and positioning hole d, the upper half of first rotating lever and second rotating lever is provided with first threaded portion, and the lower half of first rotating lever and second rotating lever is provided with second threaded portion, be provided with mirror image symmetry's first fixture and second fixture in the frame, the both ends of first fixture are provided with the first connecting sleeve of first threaded portion screw joint, and the both ends of second fixture are provided with the second connecting sleeve of second threaded portion screw joint, first fixture and second fixture are all provided with the clamping plate a and clamping plate b that can mutually cooperate and hold object, be provided with the positioning slot on first rotating lever and second rotating lever, be provided with transmission belt between two positioning slots, make first rotating lever and second rotating lever synchronous rotation, the top of frame is provided with driving arrangement, and driving arrangement can drive first rotating lever rotates, makes first fixture and second fixture movement.

[0005] Further, the driving device is provided with a motor and a torque detector.

[0006] Further, the first clamp and the second clamp are provided with a cross beam plate, the cross beam plate is provided with a positioning plate, the positioning plate is provided with a first lock hole, the clamping plate a and the clamping plate b are respectively provided with a second lock hole and a third lock hole corresponding to the position of the first lock hole, the third lock hole is externally provided with a nut, and the first clamp and the second clamp are both provided with an adjusting bolt.

[0007] Preferably, one end of the adjusting bolt is provided with a cross plate.

[0008] Further, the clamping plate a is provided with a scale groove.

[0009] Further, the positioning hole b is provided with a positioning pile.

[0010] Further, the bottom of the rack is provided with a base.

[0011] Preferably, a triangular plate connected with the supporting plate is arranged on the base.

[0012] Beneficial effects: compared with the prior art, the double-screw tension testing machine comprises a rack, the rack is provided with a top plate and a bottom plate, a first rotating rod and a second rotating rod, the first rotating rod and the second rotating rod are provided with a first threaded portion and a second threaded portion, the rack is internally provided with a first clamp and a second clamp, the first clamp is provided with a first connecting sleeve at both ends, the second clamp is provided with a second connecting sleeve at both ends, and the first clamp and the second clamp are both provided with a clamping plate a and a clamping plate b; the top of the rack is provided with a driving device, the driving device can rotate the first rotating rod, and the first clamp and the second clamp are moved; the double-screw tension testing machine has the following advantages: 1, the first clamp and the second clamp have a relatively long length, the tension of various plastics can be tested, and the application range is wide; 2, the first rotating rod and the second rotating rod rotate synchronously, the tension testing machine only needs a single driving device to stably operate, the structure is simple, and the cost is low; and 3, the first clamp and the second clamp are connected with the first rotating rod and the second rotating rod, and the equipment has a small size. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is a three-dimensional structure schematic view of the utility model.

[0014] Fig. 2 It is a rack structure schematic view of the utility model.

[0015] Fig. 3 It is a first clamp, a second clamp, a first rotating rod and a second rotating rod connection schematic view of the utility model.

[0016] Fig. 4 It is a first clamp structure schematic view of the utility model.

[0017] The attached drawings comprise:

[0018] Frame - 1, top plate - 11, bottom plate - 12, support plate - 13, positioning hole a - 14, positioning hole b - 15, positioning pile - 151, positioning hole c - 16, positioning hole d - 17, base - 18, triangular plate - 181, first rotating rod - 2, first threaded part - 21, second threaded part - 22, positioning groove - 23, transmission belt - 24, second rotating rod - 3, first clamp - 4, first connecting sleeve - 41, clamping plate a - 42, clamping plate b - 43, cross beam plate - 44, positioning plate - 45, first lock hole - 451, second lock hole - 452, third lock hole - 453, nut - 454, adjusting bolt - 46, cross plate - 461, scale groove - 47, second clamp - 5, second connecting sleeve - 51, driving device - 6, motor - 61, torque detector - 62. DETAILED DESCRIPTION

[0019] The utility model is described in detail below. Figs. 1 to 4 The utility model is described in detail below.

[0020] The utility model discloses a twin-screw tensile testing machine, comprising a frame 1, wherein the frame 1 is provided with a top plate 11 and a bottom plate 12, a support plate 13 is provided between the top plate 11 and the bottom plate 12, two ends of the top plate 11 are respectively provided with a positioning hole a14 and a positioning hole b15, the bottom plate 12 is provided with a positioning hole c16 and a positioning hole d17 corresponding to the positions of the positioning holes a14 and b15, a first rotating rod 2 is provided between the positioning holes a14 and c16, the two ends of the first rotating rod 2 are respectively movably connected with the positioning holes a14 and c16, a second rotating rod 3 is provided between the positioning holes b15 and d17, the two ends of the second rotating rod 3 are respectively movably connected with the positioning holes b15 and d17, the first rotating rod 2 is provided with a top plate 11 and a bottom plate 12, a positioning hole a14 and b15 corresponding to the positions of the positioning holes c16 and d17, a first rotating rod 2 is provided between the positioning holes a14 and c16, the two ends of the first rotating rod 2 are respectively movably connected with the positioning holes a14 and c16, a second rotating rod 3 is provided between the positioning holes b15 and d17, the two ends of the second rotating rod 3 are respectively movably connected with the positioning holes b15 and d17, The upper halves of the rotating rods 2 and 3 are provided with a first threaded portion 21, and the lower halves of the first and second rotating rods 2 and 3 are provided with a second threaded portion 22. The first and second threaded portions 21 and 22 have opposite thread directions. The frame 1 is provided with a mirror-symmetrical first clamp 4 and second clamp 5. The first clamp 4 has first connecting sleeves 41 threadedly connected to the first threaded portion 21 at both ends, and the second clamp 5 has second connecting sleeves 51 threadedly connected to the second threaded portion 22 at both ends. The first clamp 4 and second clamp 5 are each provided with a clamping plate a42 and a clamping plate b43 that can cooperate to clamp an object. Clamping plates a42 and b43 each have a predetermined length and an L-shaped cross-section. The first clamp 4 and second clamp 5 of this tensile testing machine can clamp plate-shaped plastics or multiple plastic test items simultaneously, making it widely applicable. When testing the tensile strength of multiple plastics, there is no need to replace the clamps, making it easy to use. The first rotating rod 2 and the second rotating rod 3 are provided with positioning grooves 23, and a transmission belt 24 is provided between the two positioning grooves 23, so that the first rotating rod 2 and the second rotating rod 3 rotate synchronously. A driving device 6 is provided on the top of the frame 1, and the driving device 6 can drive the first rotating rod 2 to rotate, and the second rotating rod 3 rotates synchronously with the first rotating rod 2, so that the first clamp 4 and the second clamp 5 move. Since the thread directions of the first threaded portion 21 and the second threaded portion 22 are opposite, the movement trajectories of the first clamp 4 and the second clamp 5 are that the two are close to or away from each other. The tensile testing machine of the utility model only needs a single driving device 6 to operate stably, the equipment structure is simple, and the manufacturing cost is low.

[0021] The driving device 6 is provided with a motor 61 and a torque detector 62. The motor 61 drives the first rotating rod 2 to rotate, and the generated reaction force is transmitted to the torque detector 62 to detect the maximum tensile force that the plastic can withstand.

[0022] The first clamp 4 and the second clamp 5 are provided with a crossbeam plate 44, the crossbeam plate 44 is provided with a positioning plate 45, the positioning plate 45 is provided with a first lock hole 451, the clamping plate a 42 and the clamping plate b 43 are respectively provided with a second lock hole 452 and a third lock hole 453 corresponding to the position of the first lock hole 451, the third lock hole 453 is externally provided with a nut 454, and the first clamp 4 and the second clamp 5 are both provided with an adjusting bolt 46. The crossbeam plate 44 is used for fixing the clamping plate a 42 and the clamping plate b 43, the adjusting bolt 46 is sequentially threaded through the second lock hole 452, the first lock hole 451 and the third lock hole 453 and is in threaded connection with the nut 454, the spacing between the clamping plate a 42 and the clamping plate b 43 can be adjusted by screwing the adjusting bolt 46, and the clamping plate a 42 and the clamping plate b 43 can be clamped in cooperation.

[0023] One end of the adjusting bolt 46 is provided with a cross plate 461. The cross plate 461 can facilitate manual screwing of the adjusting bolt 46 by an operator, and the first clamp 4 and the second clamp 5 are convenient and fast to operate.

[0024] The clamping plate a 42 is provided with a scale groove 47. Specifically, the scale groove 47 has a scale value, the scale values on the clamping plate a 42 of the first clamp 4 and the clamping plate a 42 of the second clamp 5 correspond to each other, the operator can position the test sample through the scale value, the direction of the test sample is parallel to the stretching direction of the experimental tensile testing machine, and the accuracy of the tensile test is improved.

[0025] The positioning hole b15 is provided with a positioning pile 151. The positioning pile 151 is in T-shaped, one end of the positioning pile 151 is inserted into the positioning hole b15 and is fixedly connected with one end of the second rotating rod 3, the second rotating rod 3 is fixed, the second rotating rod 3 is prevented from shaking, and the stability is improved.

[0026] The bottom of the rack 1 is provided with a base 18. The rack 1 of the tensile testing machine is composed of a long strip-shaped top plate 11, a bottom plate 12 and a plurality of support plates 13, is in a flat shape as a whole, and occupies a small space. The base 18 can be fixed on the ground or a table top, so that the rack 1 is fixed.

[0027] The base 18 is provided with a triangular plate 181 connected with the support plate 13. Since the driving device 6 is arranged on the top plate 11, the rack 1 forms a structure with the head being heavy and the foot being light, the triangular plate 181 can improve the support strength of the support plate 13, prevent the rack 1 from being deformed by tilting, and has high structural stability.

[0028] The above is only a preferred embodiment of the present application, and for those skilled in the art, the specific implementation manner and application range can be changed according to the idea of the present application, and the content of the specification should not be understood as a limitation of the present application.

Claims

1. A double screw tensile testing machine comprising a frame (1), characterised in that: The rack (1) is provided with a top plate (11) and a bottom plate (12), a support plate (13) is arranged between the top plate (11) and the bottom plate (12), both ends of the top plate (11) are respectively provided with positioning holes a (14) and positioning holes b (15), the bottom plate (12) is provided with positioning holes c (16) and positioning holes d (17) corresponding to the positions of the positioning holes a (14) and the positioning holes b (15), a first rotating rod (2) is arranged between the positioning holes a (14) and the positioning holes c (16), a second rotating rod (3) is arranged between the positioning holes b (15) and the positioning holes d (17), the upper half of the first rotating rod (2) and the second rotating rod (3) is provided with a first threaded part (21), the lower half of the first rotating rod (2) and the second rotating rod (3) is provided with a second threaded part (22), the rack (1) is provided with a first clamp (4) and a second clamp (5) which are mirror images, both ends of the first clamp (4) are provided with a first connecting sleeve (41) which is threadedly connected with the first threaded part (21), both ends of the second clamp (5) are provided with a second connecting sleeve (51) which is threadedly connected with the second threaded part (22), the first clamp (4) and the second clamp (5) are provided with clamping plates a (42) and clamping plates b (43) which can clamp objects in cooperation with each other. The first rotating rod (2) and the second rotating rod (3) are provided with positioning grooves (23), a transmission belt (24) is arranged between the two positioning grooves (23) to enable the first rotating rod (2) and the second rotating rod (3) to rotate synchronously, and the rack (1) is provided with a driving device (6) at the top, the driving device (6) can drive the first rotating rod (2) to rotate, so that the first clamp (4) and the second clamp (5) move.

2. A twin screw tensile testing machine according to claim 1, characterised in that: The driving device (6) is provided with a motor (61) and a torque detector (62).

3. A twin screw tensile testing machine according to claim 1, wherein: The first clamp (4) and the second clamp (5) are provided with cross beam plates (44), the cross beam plates (44) are provided with positioning plates (45), the positioning plates (45) are provided with first lock holes (451), the clamping plates a (42) and the clamping plates b (43) are respectively provided with second lock holes (452) and third lock holes (453) corresponding to the positions of the first lock holes (451), nuts (454) are arranged outside the third lock holes (453), and the first clamp (4) and the second clamp (5) are provided with adjusting bolts (46).

4. A twin screw tensile testing machine according to claim 3, wherein: One end of the adjusting bolt (46) is provided with a cross plate (461).

5. A twin screw tensile testing machine according to claim 1, wherein: The clamping plate a (42) is provided with a scale groove (47).

6. A twin screw tensile testing machine according to claim 1, wherein: The positioning hole b (15) is provided with a positioning pile (151).

7. A twin screw tensile testing machine according to claim 1, wherein: The bottom of the rack (1) is provided with a base (18).

8. A twin screw tensile testing machine according to claim 7, characterised in that: The base (18) is provided with a triangular plate (181) connected with the support plate (13).

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