CN216208115U

CN216208115U - Tensile tester for stretching long workpiece

Info

Publication number: CN216208115U
Application number: CN202120450392.7U
Authority: CN
Inventors: 鲍雨梅; 丁磊; 柴灏
Original assignee: Zhijiang College of ZJUT
Current assignee: Zhijiang College of ZJUT
Priority date: 2021-03-02
Filing date: 2021-03-02
Publication date: 2022-04-05
Anticipated expiration: 2031-03-02

Abstract

The utility model provides a tensile tester for stretching a long workpiece, and belongs to the technical field of test equipment. It has solved prior art can not tensile long work piece scheduling problem. This a tensile test appearance for long work piece includes the base, set up the box on the base, clamping device and drive arrangement, clamping device is used for the centre gripping test work piece, clamping device includes first anchor clamps and second anchor clamps, first anchor clamps are fixed in the bottom half, drive arrangement is used for driving the second anchor clamps and goes up and down, drive arrangement includes driving motor, decelerator, transmission and ball, ball includes lead screw and nut, both sides all are provided with ball in the box, be provided with the mount between two nuts, the mount is used for fixed second anchor clamps, decelerator is used for increasing the moment of torsion, transmission is used for conveying driving motor's power to the lead screw. The utility model has the advantages of being capable of stretching long workpieces and the like.

Description

Tensile tester for stretching long workpiece

Technical Field

The utility model belongs to the technical field of test equipment, and particularly relates to a tensile tester for stretching a long workpiece.

Background

The test equipment is the basic guarantee for carrying out various experimental researches, and various test equipment also come up as required by the experimental researches. Tensile properties are a very important performance indicator for engineering materials. In order to meet the requirements of tensile tests of different materials, manufacturers at home and abroad produce various types of tensile testing machines. The test devices are basically similar in modeling form and are designed according to test specifications, the tensile test of a standard sample is mainly completed, an open-loop controlled manual hydraulic universal test machine appears in the prior art, and the mechanical structure and the hydraulic loading principle of the test machine determine that the test machine is low in loading speed and small in test stroke, and the tensile test of a longer workpiece cannot be realized.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a tensile tester for stretching a long workpiece.

The purpose of the utility model can be realized by the following technical scheme: a tensile tester for stretching a long workpiece is characterized by comprising a base, a box body arranged on the base, a clamping device and a driving device, the clamping device is used for clamping a test workpiece and comprises a first clamp and a second clamp, the first clamp is fixed at the bottom of the box body, the driving device is used for driving the second clamp to lift, the driving device comprises a driving motor, a speed reducer, a transmission device and a ball screw, the ball screw comprises a screw rod and a nut, the ball screw is arranged on both sides in the box body, a fixing frame is arranged between the two nuts, the fixing frame is used for fixing the second clamp, the speed reducing device is used for increasing torque, and the transmission device is used for transmitting the power of the driving motor to the screw rod.

The working principle of the utility model is as follows: when the device is used, a person fixes a workpiece to be tested with the first clamp and the second clamp, then the driving motor is started, the driving motor rotates forwards, the torque is increased through the speed reducer, the screw rod is driven to rotate through the transmission device, the screw rod rotates to enable the nut to ascend, the nut ascends to drive the second clamp on the fixing frame to ascend, the workpiece is stretched and tested, the ball screw is adopted, therefore, the height of the nut can be adjusted to match workpieces with different lengths before the workpiece is placed, when the longer workpiece is stretched, the second clamp is firstly ascended, and the longer workpiece can be clamped to conduct stretching and testing.

In the tensile tester for stretching the long workpiece, the first clamp and the second clamp adopt manual wedge-shaped clamps.

In the tensile tester for stretching the long workpiece, the speed reducer includes a first speed reducer and a second speed reducer.

In the tensile tester for long workpiece stretching, a rotating shaft of the driving motor is connected with a first belt wheel through a first coupling, the first belt wheel is connected with a second belt wheel through a first belt, and the second belt wheel is connected with an input shaft of the first speed reducer through a second coupling.

In the tensile tester for stretching the long workpiece, the output shaft of the first speed reducer is connected with a third belt wheel through a third coupling, the third belt wheel is connected with a fourth belt wheel through a second belt, and the fourth belt wheel is connected with the input shaft of the second speed reducer through a fourth coupling.

In the tensile tester for stretching the long workpiece, the transmission device comprises a driving wheel and a transmission wheel.

In the tensile tester for stretching the long workpiece, the driving wheel is connected with the output shaft of the second speed reducer through a fifth coupling.

In the tensile tester for stretching the long workpiece, the driving wheels are arranged on two sides of the driving wheel and are used for driving the screw rod to rotate.

In the tensile tester for stretching the long workpiece, the bottom of each screw rod is provided with a gear, and the gears are meshed with the driving wheels.

In the tensile tester for stretching the long workpiece, the outer side of the screw rod is provided with a protection groove, and the protection groove is used for protecting the screw rod.

In the tensile tester for the long workpiece, one side of the base is provided with the control panel, and the control panel is used for people to operate.

Compared with the prior art, the utility model has the advantage of being capable of stretching long workpieces.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic structural view of the driving device of the present invention.

In the figure, 1, a base; 2. a box body; 3. a clamping device; 4. a first clamp; 5. a second clamp; 6. a drive motor; 7. a reduction gear; 8. a transmission device; 9. a ball screw; 10. a screw rod; 11. a nut; 12. A fixed mount; 13. a first decelerator; 14. a second decelerator; 15. a first pulley; 16. a second pulley; 17. a third belt pulley; 18. a fourth pulley; 19. a first coupling; 20. a second coupling; 21. a third coupling; 22. a fourth coupling; 23. a fifth coupling; 24. a drive wheel; 25. a driving wheel; 26. A gear; 27. a protective groove; 28. a control panel.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1-2, the tensile tester for drawing a long workpiece includes a base 1, a box 2 disposed on the base 1, a clamping device 3 and a driving device, the clamping device 3 is used for clamping a test workpiece, the clamping device 3 includes a first clamp 4 and a second clamp 5, the first clamp 4 is fixed at the bottom of the box 2, the driving device is used for driving the second clamp 5 to ascend and descend, the driving device includes a driving motor 6, a speed reducer 7, a transmission device 8 and a ball screw 9, the ball screw 9 includes a screw rod 10 and nuts 11, the ball screw 9 is disposed on two sides in the box 2, a fixing frame 12 is disposed between the two nuts 11, the fixing frame 12 is used for fixing the second clamp 5, the speed reducer 7 is used for increasing torque, the transmission device 8 is used for transmitting the power of the driving motor 6 to the screw rod 10, in this embodiment, a ball bearing is sleeved outside the nuts 11 in the ball screw 9, the outer wall of the rolling bearing is fixed with the fixing frame 12, so that the rotating force of the nut 11 can be offset by the rolling bearing when the nut moves on the screw rod 10, and the ball screw 9 is adopted to improve the precision of a tensile test and the accuracy of test data by utilizing the characteristic that the nut 11 is randomly displaced on the screw rod 10.

In a further elaboration, the first clamp 4 and the second clamp 5 adopt manual wedge-shaped clamps, and the manual wedge-shaped clamps have the characteristics of small initial clamping force and increased clamping force along with the increase of the tensile force borne by the sample, so that the sample slipping phenomenon can be effectively avoided.

In more detail, the speed reducer 7 comprises a first speed reducer 13 and a second speed reducer 14, the first speed reducer 14 and the second speed reducer 14 adopt gear 26 speed reducers in implementation, and the speed reducer has the advantages of small size and large transmission torque, has fine and graded transmission ratio, meets different use conditions, realizes mechanical and electrical integration, and is high in transmission efficiency, low in energy consumption and excellent in performance.

In more detail, a rotating shaft of the driving motor 6 is connected with a first belt pulley 15 through a first coupling 19, the first belt pulley 15 is connected with a second belt pulley 16 through a first belt, the second belt pulley 16 is connected with an input shaft of the first speed reducer 13 through a second coupling 20, the accuracy of the tensile test can be prevented from being influenced by vibration of the motor through belt transmission, and meanwhile, the overload protection of the motor is prevented from being burnt out due to overlarge required torque in the tensile test process.

In more detail, the output shaft of the first speed reducer 13 is connected with a third belt wheel 17 through a third coupling 21, the third belt wheel 17 is connected with a fourth belt wheel 18 through a second belt, the fourth belt wheel 18 is connected with the input shaft of the second speed reducer 14 through a fourth coupling 22, and the two shafts are fixedly connected through the couplings and simultaneously play a certain overload protection role.

In further detail, the transmission device 8 comprises a driving wheel 24 and a transmission wheel 25.

More specifically, the drive wheel 24 is connected to the output shaft of the second reduction gear 14 via a fifth coupling 23.

In more detail, the driving wheels 24 are provided with driving wheels 25 on both sides.

In a further detail, the bottom of the screw rod 10 is provided with a gear 26, the gear 26 is meshed with the transmission wheel 25, the transmission wheel 25 is used for driving the screw rod 10 to rotate, when the driving wheel 24 rotates clockwise, the transmission wheels 25 on both sides rotate anticlockwise, then the transmission wheel 25 drives the gear 26, the gears 26 on both sides rotate clockwise, so that the screw rod 10 rotates in the same direction, and the nuts 11 on both sides can also simultaneously ascend and descend.

More specifically, a protection groove 27 is formed outside the screw rod 10, and the protection groove 27 is used for protecting the screw rod 10 and can play a certain protection role in protecting the screw rod 10.

In further detail, one side of the base 1 is provided with a control panel 28, and the control panel 28 is used for people to operate, so that the multifunctional desk lamp is convenient and practical.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Although a large number of terms are used here more, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. A tensile tester for stretching a long workpiece is characterized by comprising a base (1), a box body (2) arranged on the base (1), a clamping device (3) and a driving device, wherein the clamping device (3) is used for clamping a test workpiece, the clamping device (3) comprises a first clamp (4) and a second clamp (5), the first clamp (4) is fixed at the bottom of the box body (2), the driving device is used for driving the second clamp (5) to lift, the driving device comprises a driving motor (6), a speed reducing device (7), a transmission device (8) and a ball screw (9), the ball screw (9) comprises a screw rod (10) and a nut (11), the ball screw rod (9) is arranged on two sides in the box body (2), and a fixing frame (12) is arranged between the nuts (11), the fixing frame (12) is used for fixing the second clamp (5), the speed reducing device (7) is used for increasing torque, and the transmission device (8) is used for transmitting the power of the driving motor (6) to the screw rod (10).

2. The tensile tester for drawing long workpieces according to claim 1, wherein the first clamp (4) and the second clamp (5) are manual wedge clamps.

3. The tensile tester for elongated workpieces according to claim 1, wherein said deceleration device (7) comprises a first decelerator (13) and a second decelerator (14).

4. The tensile tester for long workpiece stretching according to claim 3, wherein the rotating shaft of the driving motor (6) is connected with a first belt wheel (15) through a first coupling (19), the first belt wheel (15) is connected with a second belt wheel (16) through a first belt, the second belt wheel (16) is connected with the input shaft of the first speed reducer (13) through a second coupling (20), the output shaft of the first speed reducer (13) is connected with a third belt wheel (17) through a third coupling (21), the third belt wheel (17) is connected with a fourth belt wheel (18) through a second belt, and the fourth belt wheel (18) is connected with the input shaft of the second speed reducer (14) through a fourth coupling (22).

5. A tensile tester for elongation of a long workpiece according to claim 4, wherein said transmission means (8) comprises a driving wheel (24) and a transmission wheel (25).

6. The tensile tester for the stretching of long workpieces according to claim 5, wherein said driving wheel (24) is connected to the output shaft of said second reducer (14) through a fifth coupling (23).

7. The tensile tester for drawing the long workpiece according to claim 5, wherein the driving wheels (25) are arranged on both sides of the driving wheel (24), and the driving wheels (25) are used for driving the screw rods (10) to rotate.

8. The tensile tester for drawing long workpieces according to claim 5, wherein gears (26) are arranged at the bottoms of the screw rods (10), and the gears (26) are meshed with the transmission wheels (25).

9. The tensile tester for drawing long workpieces according to claim 1, wherein a protective groove (27) is formed on the outer side of the screw rod (10), and the protective groove (27) is used for protecting the screw rod (10).

10. The tensile tester for drawing long workpieces according to claim 1, wherein a control panel (28) is arranged on one side of the base (1), and the control panel (28) is used for human operation.