Fatigue resistance experiment device for engineering mechanics

Abstract

The utility model discloses a fatigue resistance experiment device for engineering mechanics, which comprises a shell component provided with a hollow experiment cavity; the experiment assembly is used for clamping an experiment piece and carrying out a stretching or twisting or bending test, and is mounted in the experiment cavity; and the observation assembly is used for rotating around the experiment piece so as to record the experiment condition of the experiment piece from the periphery of the experiment piece. When a tensile experiment is carried out, the bottom of an experiment piece can be firstly clamped on the first rotary clamping jaw, then the second rotary clamping jaw moves downwards and clamps the top of the experiment piece, and the second rotary clamping jaw moves upwards, so that the tensile experiment is carried out; when the twisting experiment is carried out, the twisting experiment is basically the same as the tensile experiment, and the difference is that the second rotary clamping jaw rotates while moving upwards to carry out the twisting experiment; when a bending experiment is carried out, the second rotating clamping jaw moves upwards to a proper height, then the pushing rod is pushed forwards, the experiment piece is pushed through the pushing rod upper ejecting block, the experiment piece in the stretching state is bent, and therefore the bending experiment is carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental devices, in particular to a fatigue resistance experimental device for engineering mechanics. Background Art

[0002] The fatigue test in engineering mechanics is an experimental method used to test the structural performance and its changing rules of materials or structures under repeated or repetitive loads. Its purpose is to determine the fatigue limit and fatigue life of materials or structures. In fatigue tests, the specimens are subjected to alternating loads, which can be tension, torsion, bending, etc., depending on the materials and structures being studied. By observing and measuring the deformation, crack propagation and fracture behaviors of the specimens under alternating loads, their fatigue resistance can be evaluated.

[0003] Common engineering mechanics fatigue test devices can only perform fatigue tests in a single mode. When changing the test mode, other experimental devices need to be replaced, which takes up a lot of space. Therefore, an engineering mechanics fatigue test device is proposed. Utility Model Content

[0004] In view of the above problems, a fatigue resistance experimental device for engineering mechanics is now provided, aiming to solve the problem of single experimental items existing in the existing experimental devices in the background technology.

[0005] The specific technical solutions are as follows:

[0006] An engineering mechanics fatigue test device, comprising:

[0007] The shell assembly has a hollow experimental cavity;

[0008] A test assembly, used to clamp the test piece and perform tension or torsion or bending test, installed in the test chamber; and

[0009] The observation component is used to rotate around the experimental piece to record the experimental conditions of the experimental piece from all sides of the experimental piece, and is installed in the experimental chamber.

[0010] Furthermore, the shell assembly includes a chassis, a rear shell and two door shells. The rear shell is fixedly mounted on the chassis, and the door shells are rotatably mounted on the rear shell. The chassis, the rear shell and the door shells can be combined to form an experimental chamber.

[0011] Furthermore, at least three leveling screws are installed on the chassis, and the leveling screws are spirally installed on the chassis.

[0012] Furthermore, a fixed suction cup is installed at the bottom of the leveling screw.

[0013] Furthermore, the experimental component includes at least a first rotating jaw, a second rotating jaw and a pushing rod. The first rotating jaw is installed on the chassis, and the second rotating jaw and the pushing rod are respectively located above and on one side of the first rotating jaw. The second rotating jaw and the pushing rod can slide toward or away from the first rotating jaw.

[0014] Furthermore, the experimental component also includes two mounting columns and two lifting sliders. The mounting columns are located on both sides of the first rotating clamp. The lifting sliders are respectively embedded in the mounting columns one by one. The lifting sliders can slide up and down along the mounting columns. The second rotating clamp is installed on one of the lifting sliders through a telescopic rod, and the push rod is installed on the other lifting slider.

[0015] Furthermore, the experimental component includes two lifting screw motors, the lifting screw motors are installed in the mounting columns, and the lifting sliders are installed on the driving screws of the lifting screw motors one by one.

[0016] Furthermore, the observation assembly includes a fixed ring, a rotating ring, a servo and a camera device. The fixed ring can slide in a direction close to or away from the chassis, the rotating ring can be rotatably installed on the fixed ring, and the camera device is installed on the rotating ring through the servo.

[0017] Furthermore, the observation assembly also includes an observation screw motor and a sliding rod. The observation screw motor is installed on the chassis, the fixing ring is spirally installed on the driving screw of the observation screw motor, and the fixing ring is also passed through the sliding rod.

[0018] Furthermore, the observation component also includes a transmission gear ring and a rotary drive motor. The transmission gear ring is installed on the rotary ring, and the rotary drive motor is installed on the fixed ring. The transmission gear ring is connected to the drive gear on the output shaft of the rotary drive motor.

[0019] The beneficial effects of the above scheme are:

[0020] The experimental device provided by the utility model can realize three test functions of stretching, twisting and bending, and can record the experimental conditions of the experimental piece in real time, thus solving the problems existing in the existing experimental devices in the background technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of the overall structure of the experimental device provided in the embodiment of the utility model;

[0022] Figure 2 for Figure 1 A partial enlarged view of the portion corresponding to the letter A in the figure;

[0023] Figure 3 A three-dimensional diagram of the internal structure of the mounting column in an embodiment of the utility model;

[0024] Figure 4 It is a cross-sectional view of the internal structure of the chassis in an embodiment of the present utility model.

[0025] In the figure: 1. chassis; 2. rear shell; 3. door shell; 4. suction cup; 5. first drive motor; 6. first mechanical claw; 7. mounting column; 8. mounting column; 9. lifting screw motor; 10. drive screw; 11. lifting slider; 12. telescopic rod; 13. lifting slider; 14. push rod; 15. top block; 16. second drive motor; 17. second mechanical claw; 18. observation screw motor; 19. drive screw; 20. slide rod; 21. fixed ring; 22. rotating ring; 23. transmission gear ring; 24. drive motor; 25. drive gear; 26. servo; 27. camera device; 28. adjustment screw. DETAILED DESCRIPTION

[0026] The following will be combined with 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.

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0028] The present invention will be further described below in conjunction with specific embodiments, but this is not intended to limit the present invention.

[0029] like Figures 1 to 4 As shown, the fatigue resistance experimental device of engineering mechanics provided in the embodiment of the utility model includes a shell component, an experimental component and an observation component; the shell component has a hollow experimental cavity; the experimental component is used to clamp the experimental piece and perform tensile or twisting or bending tests, and is installed in the experimental cavity; the observation component is used to rotate around the experimental piece to record the experimental conditions of the experimental piece from all sides of the experimental piece, and is installed in the experimental cavity.

[0030] As a specific example, Figure 1 As shown, the shell assembly in the utility model includes a chassis 1, a rear shell 2 and two door shells 3. The rear shell 2 is fixedly installed on the chassis 1, and the door shell 3 is rotatably installed on the rear shell 2. The chassis 1, the rear shell 2 and the door shell 3 can be combined to form a closed experimental cavity. Subsequent experimental components are installed in the experimental cavity to form a safety structure using the experimental cavity to prevent injuries to personnel caused by the collapse of experimental pieces during the experiment. In the above structure, the door shell 3 can be made of transparent material to facilitate the experimenter to observe the experimental conditions in the experimental cavity.

[0031] like Figure 1, Figure 4 As shown, in the present invention, four leveling screws 28 may be further installed on the chassis 1, and the leveling screws 28 are spirally installed on the chassis 1, so that the experimental device can be leveled by using the leveling screws 28. Figure 4 As shown, in order to increase the stability of the device, a suction cup 4 may be further installed at the bottom of the leveling screw 28 so that the device can be stably adsorbed on the experimental table by the suction cup 4.

[0032] As a specific example, Figure 1 , Figure 3 As shown, the experimental assembly in the utility model at least includes a first rotating jaw, a second rotating jaw and a push rod 14, the first rotating jaw is installed on the chassis 1, the second rotating jaw and the push rod 14 are respectively located above and on one side of the first rotating jaw, and the second rotating jaw and the push rod 14 can slide in the direction close to or away from the first rotating jaw; under the above structure, when a tensile test is performed, the bottom of the test piece can be clamped on the first rotating jaw first, and then the second rotating jaw descends and clamps the top of the test piece, and then the second rotating jaw ascends, so as to perform a tensile test; when a torsion test is performed, it is basically the same as the tensile test, the difference is that the second rotating jaw rotates while ascending to perform a torsion test; when a bending test is performed, the second rotating jaw ascends to a suitable height, and then the push rod 14 (which can be an electric telescopic rod) is pushed forward, so as to use the top block 15 on the push rod 14 to push the test piece to bend the test piece, so as to perform a bending test.

[0033] The first rotating jaw and the second rotating jaw in the utility model can be directly purchased from the market, or the commercially available mechanical jaws can be installed on a drive motor to be assembled, such as installing the first mechanical jaw 6 on the first drive motor 5 to form a first rotating jaw, and installing the second mechanical jaw 17 on the second drive motor 16 to form a second rotating jaw, thereby utilizing the drive motor to realize the rotation function of the mechanical jaw.

[0034] As a specific driver example, Figure 1 , Figure 3 As shown, the above-mentioned experimental component also includes two mounting columns 7, 8 and two lifting sliders 11, 13. The two mounting columns 7, 8 are respectively located on both sides of the first rotating clamp. A lifting screw motor 9 and a lifting slider 11, 13 are respectively installed in each mounting column 7, 8. The lifting sliders 11, 13 are respectively installed on the driving screw of the lifting screw motor 9 in a one-to-one correspondence. The second rotating clamp is installed on one of the lifting sliders through the telescopic rod 12, and the pushing rod 14 is installed on the other lifting slider. Under the above-mentioned structure, the lifting sliders are correspondingly embedded on the mounting columns 7, 8, so that the lifting sliders are driven up and down by the lifting screw motor 9, thereby driving the second rotating clamp and the pushing rod 14 to slide up and down.

[0035] As a specific driver example, Figure 1 , Figure 2 As shown, the observation assembly in the utility model includes a fixed ring 21, a rotating ring 22, a steering gear 26 and a camera device 27. The fixed ring 21 can slide in a direction close to or away from the chassis 1, the rotating ring 22 can be rotatably installed on the fixed ring 21, and the camera device 27 is installed on the rotating ring 22 through the steering gear 26. For the convenience of observation, the fixed ring 21 in the utility model is located at the periphery of the experimental assembly. When the tension, torsion and bending tests are performed, the fixed ring 21 reciprocates to slide in a direction close to or away from the chassis 1. The rotating ring 22 rotates during the sliding process, so that the camera device 27 on the rotating ring 22 can be used to record the experimental conditions of the experimental piece in real time from all around the experimental piece.

[0036] As a specific driver example, Figure 1 , Figure 2 As shown, the observation assembly in the utility model also includes an observation screw motor 18 and a slide bar 20. The observation screw motor 18 is installed on the chassis 1, and the fixing ring 21 is spirally installed on the driving screw 19 of the observation screw motor 18, and the fixing ring 21 is also penetrated on the slide bar 20; in the above structure, the observation screw motor 18 is used to drive the fixing ring 21 to move up and down along the slide bar 20. Based on the above technical solution, as Figure 1 , Figure 2 As shown, the above-mentioned observation component may further include a transmission gear ring 23 and a rotation drive motor 24. The transmission gear ring 23 is installed on the rotating ring 22, and the rotation drive motor 24 is installed on the fixed ring 21. The transmission gear ring 23 is meshed with a driving gear 25 on the output shaft of the rotation drive motor 24 for transmission, thereby driving the rotating ring 22 to rotate through the rotation drive motor 24.

[0037] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of the present invention specification should be included in the protection scope of the present invention.

Claims

1. A fatigue test device for engineering mechanics, characterized in that: include: A shell assembly having a hollow experimental cavity, the shell assembly comprising a chassis, a rear shell and two door shells, the rear shell being fixedly mounted on the chassis, the door shell being rotatably mounted on the rear shell, and the chassis, the rear shell and the door shells being able to enclose the experimental cavity; An experimental assembly, used for clamping the experimental piece and performing a tensile, torsion or bending test, and installed in the experimental chamber. The experimental assembly at least comprises a first rotating jaw, a second rotating jaw and a push rod. The first rotating jaw is installed on the chassis, and the second rotating jaw and the push rod are respectively located above and on one side of the first rotating jaw. The second rotating jaw and the push rod can slide in a direction close to or away from the first rotating jaw. as well as An observation component is used to rotate around the experimental piece to record the experimental conditions of the experimental piece from all sides of the experimental piece. The observation component is installed in the experimental chamber. The observation component includes a fixed ring, a rotating ring, a servo and a camera device. The fixed ring can slide toward or away from the chassis. The rotating ring can be rotatably installed on the fixed ring. The camera device is installed on the rotating ring through the servo.

2. The fatigue test device for engineering mechanics according to claim 1, characterized in that: At least three leveling screws are installed on the chassis, and the leveling screws are spirally installed on the chassis.

3. The fatigue resistance test device of engineering mechanics according to claim 2, characterized in that: A fixed suction cup is installed at the bottom of the leveling screw rod.

4. The fatigue resistance test device for engineering mechanics according to claim 1, characterized in that: The experimental assembly also includes two mounting columns and two lifting sliders. The mounting columns are located on both sides of the first rotating clamp. The lifting sliders are respectively embedded in the mounting columns in a one-to-one correspondence. The lifting sliders can slide up and down along the mounting columns. The second rotating clamp is installed on one of the lifting sliders through a telescopic rod, and the pushing rod is installed on the other lifting slider.

5. The fatigue resistance test device for engineering mechanics according to claim 4, characterized in that: The experimental assembly includes two lifting screw motors, the lifting screw motors are installed in the installation column, and the lifting sliders are installed on the driving screws of the lifting screw motors in a one-to-one correspondence.

6. The fatigue test device for engineering mechanics according to claim 1, characterized in that: The observation assembly also includes an observation screw motor and a sliding rod. The observation screw motor is installed on the chassis. The fixing ring is spirally installed on the driving screw of the observation screw motor, and the fixing ring is also passed through the sliding rod.

7. The fatigue resistance test device for engineering mechanics according to claim 6, characterized in that: The observation component also includes a transmission gear ring and a rotary drive motor. The transmission gear ring is installed on the rotary ring, and the rotary drive motor is installed on the fixed ring. The transmission gear ring is meshed with a drive gear on an output shaft of the rotary drive motor for transmission.

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