A fatigue testing fixture and testing method for a guide wheel tensioning mechanism

Abstract

This invention provides a fatigue testing fixture and method for a guide wheel tensioning mechanism, relating to the field of engineering machinery. It includes a fixture testing base, with the guide wheel tensioning mechanism mounted on top of the base. A strip-shaped groove is formed on the lower inner wall of the fixture testing base. A double-acting lead screw is rotatably connected to both sides of the inner wall of the strip-shaped groove. Moving blocks are threaded to both sides of the arms of the double-acting lead screw. Rotating rods are rotatably connected to the upper surfaces of the two moving blocks. A lifting plate is rotatably connected to the upper ends of the two rotating rods. Connecting rods are fixedly connected to both sides of the upper surface of the lifting plate. This invention can simulate the real-world fatigue test conditions of a guide wheel tensioning mechanism under different tensile forces during actual use, thereby ensuring the accuracy of the fatigue test and improving the effectiveness and realism of the fatigue test.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery, and in particular to a fatigue testing fixture and testing method for a guide wheel tensioning mechanism. Background Technology

[0002] Due to the rapid development of the construction machinery industry in China in recent years, the country has vigorously promoted the development of the construction machinery manufacturing industry. With the increasing demand for construction machinery in China, the supply and demand contradiction has gradually widened. Among them, excavators have advantages such as high traction, strong climbing ability, and small turning radius, and therefore have been widely used in engineering construction and mining development.

[0003] Currently, existing fatigue testing equipment for guide wheel tensioning mechanisms generally places the guide wheel tensioning mechanism directly onto the inspection equipment for rotational durability testing, thereby achieving the purpose of fatigue testing of the guide wheel tensioning mechanism. However, in actual use, the tensile force on the contact surface of the guide wheel tensioning mechanism is different from that in the fatigue test, which leads to a discrepancy between the fatigue test results and the actual test data. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a fatigue testing fixture and method for a guide wheel tensioning mechanism. This solves the problem that conventional fatigue testing equipment for guide wheel tensioning mechanisms typically places the mechanism directly onto an inspection device for rotational durability testing, thus achieving the purpose of fatigue testing. However, in actual use, the tensile force at the contact surface of the guide wheel tensioning mechanism differs from the actual test data, leading to discrepancies between the fatigue test results and the actual inspection data.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a fatigue testing fixture and testing method for a guide wheel tensioning mechanism, comprising a fixture testing base, wherein a guide wheel tensioning mechanism is disposed above the fixture testing base;

[0008] The tooling inspection base has a strip groove on the lower part of its inner wall. A bidirectional lead screw is rotatably connected to both sides of the inner wall of the strip groove. Moving blocks are threaded to both sides of the arm of the bidirectional lead screw. Rotating rods are rotatably connected to the upper surfaces of the two moving blocks. A lifting plate is rotatably connected to the upper ends of the two rotating rods. Connecting rods are fixedly connected to both sides of the upper surface of the lifting plate. Openings are opened on both sides of the upper surface of the tooling inspection base. The upper ends of the two connecting rods extend to the upper sides of the tooling inspection base through the corresponding openings. A simulated contact panel is fixedly connected to the upper ends of the two connecting rods.

[0009] A cylinder is fixedly connected to the center of the lower part of the inner wall of the tooling inspection base. An opening is provided at the center of the upper surface of the lifting plate. The output end of the cylinder extends to the top of the lifting plate through the opening. A lifting rod is fixedly connected to the output end of the cylinder. A circular connecting opening is provided at the center of the upper surface of the tooling inspection base and the center of the lower surface of the simulation contact panel. A reserved groove is provided on the upper surface of the simulation contact panel. The upper end of the lifting rod extends into the reserved groove through the circular connecting opening and is fixedly connected to a simulated protrusion.

[0010] Preferably, mounting plates are fixedly connected to both sides of the upper surface of the tooling testing base, threaded rods are threadedly connected to the upper side of the inner wall of the two mounting plates, clamping plates are fixedly connected to the opposite side of the two threaded rods, and knobs are fixedly connected to the opposite side of the two threaded rods.

[0011] Furthermore, a displacement sensor and a pressure sensor are fixedly connected to the lower side of the two mounting plates on opposite sides, respectively. A drive device and a speed sensor are placed on the rear side above the tooling detection base. A human-machine interface display screen is fixedly connected to one side of the tooling detection base and one of the mounting plates.

[0012] Furthermore, a mounting shell is fixedly connected to the lower side of one side of the tooling inspection base, and a reduction motor is fixedly connected to one side of the inner wall of the mounting shell. The output end of the reduction motor is fixedly connected to one end of a bidirectional lead screw. Guide grooves are provided on both sides of the inner wall of the tooling inspection base, and guide blocks are slidably connected to the inner walls of the two guide grooves. The opposite ends of the two guide blocks are fixedly connected to the two sides of the lifting plate, respectively.

[0013] A fatigue test fixture test method for a guide wheel tensioning mechanism, S1: The guide wheel tensioning mechanism is placed on the upper part of the fixture test base, and then the threaded rod is rotated by the knob so that the threaded rod can cooperate with the clamping plate to clamp the guide wheel tensioning mechanism. Then the drive mechanism on the rear side of the upper part of the fixture test base drives the guide wheel tensioning mechanism.

[0014] S2. During the fatigue test of the guide wheel tensioning mechanism, the drive equipment is started by an external power supply. Then, the geared motor drives the bidirectional lead screw to rotate. The bidirectional lead screw drives the two threaded moving blocks to move relative to each other. The two moving blocks drive the lifting plate to rise through the rotating rod. The lifting plate drives the simulated contact panel to contact the surface of the guide wheel tensioning mechanism through the connecting rod, thereby simulating the friction force of the most realistic use environment.

[0015] S3. While simulating the real contact surface, the cylinder can drive the lifting rod to rise and fall. The lifting rod can drive the simulated protrusion to apply an upward thrust to the guide wheel tensioning mechanism, so that the guide wheel tensioning mechanism is subjected to an upward thrust, thereby achieving a reverse tension effect, so that the guide wheel tensioning mechanism can simulate the data generated under tension during the experiment.

[0016] Furthermore, during the drive of S1, the speed sensor can guide the wheel tensioning mechanism to detect the speed, and can transmit the data to the human-machine interface display screen in real time via the line.

[0017] Furthermore, in S2, a pressure sensor is used to detect the pressure on the guide wheel tensioning mechanism, and the detected data can be transmitted to the human-machine interface display screen for display via a circuit.

[0018] Furthermore, the S3 uses a displacement sensor to detect the displacement of the guide wheel tensioning mechanism caused by pressure, and the data can be transmitted to the human-machine interface display screen via a circuit.

[0019] Furthermore, the simulated contact panel in S2 is made of metal sheet that is commonly used in the actual operation of the guide wheel tensioning machine, and the drive range of the geared motor can be adjusted according to the actual installation height of the guide wheel tensioning mechanism, so that the simulated contact panel can always be in contact with the lower surface of the guide wheel tensioning mechanism.

[0020] Furthermore, all devices in any of steps S1-S3 are connected to an external power source via a power line before use, and can be started by turning on the corresponding power switch.

[0021] (III) Beneficial Effects

[0022] This invention provides a fatigue testing fixture and method for a guide wheel tensioning mechanism. It offers the following advantages:

[0023] 1. This invention can simulate the actual fatigue test of the guide wheel tensioning mechanism under different tensile forces during actual use, thereby ensuring the accuracy of the fatigue test of the guide wheel tensioning mechanism and improving the effect and authenticity of the fatigue test of the guide wheel tensioning mechanism.

[0024] 2. The test method used in this invention can reflect the fatigue resistance of the guide wheel tensioning mechanism to the greatest extent, making the test data more realistic and effective. This solves the test error problem existing in the fatigue test equipment of the traditional guide wheel tensioning mechanism, and makes the test structure of the fatigue test equipment of the guide wheel tensioning mechanism closer to the real data. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is a schematic diagram of the front cross-sectional structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the front cross-sectional structure of the tooling testing base of the present invention.

[0028] The components include: 1. Tooling inspection base; 2. Guide wheel tensioning mechanism; 3. Strip groove; 4. Two-way lead screw; 5. Moving block; 6. Rotating rod; 7. Lifting plate; 8. Connecting rod; 9. Openings on both sides; 10. Simulated contact panel; 11. Cylinder; 12. Through port; 13. Lifting rod; 14. Circular connecting opening; 15. Reserved groove; 16. Simulated protrusion; 17. Mounting plate; 18. Threaded rod; 19. Clamping plate; 20. Knob; 21. Displacement sensor; 22. Pressure sensor; 23. Human-machine interface display screen; 24. Mounting shell; 25. Gear motor; 26. Guide groove; 27. Guide block. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1:

[0030] like Figure 1-3 As shown, this embodiment of the invention provides a fatigue testing fixture and testing method for a guide wheel tensioning mechanism, including a fixture testing base 1, and a guide wheel tensioning mechanism 2 is disposed above the fixture testing base 1;

[0031] A strip groove 3 is provided on the lower part of the inner wall of the tooling inspection base 1. A two-way lead screw 4 is rotatably connected to both sides of the inner wall of the strip groove 3. Moving blocks 5 are threaded to both sides of the arm of the two-way lead screw 4. Rotating rods 6 are rotatably connected to the upper surfaces of the two moving blocks 5. Lifting plates 7 are rotatably connected to the upper ends of the two rotating rods 6. Connecting rods 8 are fixedly connected to both sides of the upper surface of the lifting plate 7. Openings 9 are provided on both sides of the upper surface of the tooling inspection base 1. The upper ends of the two connecting rods 8 extend to the upper sides of the tooling inspection base 1 through the corresponding openings 9. Simulation contact panels 10 are fixedly connected to the upper ends of the two connecting rods 8, which can simulate the friction force that exists in the actual use of the guide wheel tensioning mechanism 2.

[0032] A cylinder 11 is fixedly connected to the center of the lower part of the inner wall of the tooling test base 1. A through-hole 12 is opened at the center of the upper surface of the lifting plate 7. The output end of the cylinder 11 extends to the top of the lifting plate 7 through the through-hole 12. A lifting rod 13 is fixedly connected to the output end of the cylinder 11. A circular connecting opening 14 is opened at the center of the upper surface of the tooling test base 1 and the center of the lower surface of the simulation contact panel 10. A reserved groove 15 is opened on the upper surface of the simulation contact panel 10. The upper end of the lifting rod 13 extends into the reserved groove 15 through the circular connecting opening 14 and is fixedly connected to a simulated protrusion 16. It can apply a thrust to the guide wheel tensioning mechanism 2 during the fatigue test, thereby causing the guide wheel tensioning mechanism 2 to be subjected to a reverse tension force, so that the guide wheel tensioning mechanism 2 can simulate the most realistic data situation under the action of tension during the test.

[0033] Mounting plates 17 are fixedly connected to both sides of the upper surface of the tooling test base 1. Threaded rods 18 are threadedly connected to the upper side of the inner wall of the two mounting plates 17. Clamping plates 19 are fixedly connected to the opposite side of the two threaded rods 18. Knobs 20 are fixedly connected to the opposite side of the two threaded rods 18. Displacement sensors 21 and pressure sensors 22 are fixedly connected to the lower side of the opposite side of the two mounting plates 17, respectively. A drive device and a speed sensor are placed on the rear side above the tooling test base 1. A human-machine interface display screen 23 is fixedly connected to one side of the tooling test base 1 and one of the mounting plates 17. The test data can be detected and transmitted to the human-machine interface display screen 23 for display.

[0034] The above mechanisms simulate the actual fatigue test of the guide wheel tensioning mechanism 2 under different tensile forces during actual use, thereby ensuring the accuracy of the fatigue test of the guide wheel tensioning mechanism 2 and improving the effect and authenticity of the fatigue test of the guide wheel tensioning mechanism 2.

[0035] A mounting shell 24 is fixedly connected to the lower side of one side of the tooling inspection base 1. A geared motor 25 is fixedly connected to one side of the inner wall of the mounting shell 24, which can provide a power source for the rotation of the bidirectional lead screw 4. The output end of the geared motor 25 is fixedly connected to one end of the bidirectional lead screw 4. Guide grooves 26 are provided on both sides of the inner wall of the tooling inspection base 1. Guide blocks 27 are slidably connected to the inner walls of the two guide grooves 26. The opposite ends of the two guide blocks 27 are fixedly connected to the two sides of the lifting plate 7, which can guide and limit the lifting plate 7 when it is raised and lowered. Example 2:

[0036] like Figure 1 As shown, this embodiment of the invention provides a fatigue testing fixture and method for a guide wheel tensioning mechanism, which is further expanded based on the content of specific embodiment one:

[0037] One of the fatigue testing fixtures and testing methods for a guide wheel tensioning mechanism includes: S1, placing the guide wheel tensioning mechanism 2 on top of the fixture testing base 1, and then rotating the threaded rod 18 by the knob 20, so that the threaded rod 18 can cooperate with the clamping plate 19 to clamp the guide wheel tensioning mechanism 2, thus fixing the guide wheel tensioning mechanism 2 to be tested. Then, the drive mechanism on the rear side of the fixture testing base 1 drives the guide wheel tensioning mechanism 2, providing the guide wheel rotation drive source required for the test. During the drive in S1, the speed sensor can detect the speed of the guide wheel tensioning mechanism 2, detect the rotation of the guide wheel, and transmit the data to the human-machine interface display screen 23 in real time through the line, so as to display the rotation data well.

[0038] S2. During the fatigue test of the guide wheel tensioning mechanism 2, the drive equipment is started by an external power supply. Then, the reduction motor 25 drives the bidirectional lead screw 4 to rotate. The bidirectional lead screw 4 drives the two threaded moving blocks 5 to move relative to each other. The two moving blocks 5 drive the lifting plate 7 to rise through the rotating rod 6. The lifting plate 7 drives the simulated contact panel 10 to contact the surface of the guide wheel tensioning mechanism 2 through the connecting rod 8, thereby simulating the most realistic frictional force in the usage environment. The position of the simulated contact panel 10 can be adjusted according to the installation position of the guide wheel tensioning mechanism 2, so that the simulated contact panel 10 can cooperate well with the drive equipment to tension the guide wheel tensioning mechanism 2. To conduct a test that closely resembles real-world conditions, pressure sensor 22 is used in S2 to detect the pressure on the guide wheel tensioning mechanism 2. The detected data is transmitted to the human-machine interface display screen 23 for display. The simulated contact panel 10 in S2 is made of metal sheet commonly used in actual use of the guide wheel tensioning machine. The drive range of the geared motor 25 can be adjusted according to the actual installation height of the guide wheel tensioning mechanism 2, ensuring that the simulated contact panel 10 is always in contact with the lower surface of the guide wheel tensioning mechanism 2. This allows the equipment to simulate the environment of real-world test conditions to the greatest extent possible.

[0039] S3. While simulating the real contact surface, the cylinder 11 can drive the lifting rod 13 to rise and fall. The lifting rod 13 can drive the simulated protrusion 16 to apply an upward thrust to the guide wheel tensioning mechanism 2, so that the guide wheel tensioning mechanism 2 is subjected to an upward thrust, thereby achieving a reverse tension effect. This allows the guide wheel tensioning mechanism 2 to simulate the data generated under tension during the experiment, and the tension condition of the guide wheel tensioning mechanism 2 under use can be tested. In S3, the displacement sensor 21 detects the displacement of the guide wheel tensioning mechanism 2 caused by pressure, and the data can be transmitted to the human-machine interface display screen 23 through the line, which can effectively detect the displacement of the guide wheel tensioning mechanism 2 under tension.

[0040] Before use, all devices in any of steps S1-S3 are connected to an external power source via a power line. Afterward, the corresponding device can be started by turning on the corresponding power switch.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fatigue testing fixture for a guide wheel tensioning mechanism, comprising a fixture testing base (1), characterized in that: A guide wheel tensioning mechanism (2) is provided above the tooling inspection base (1); The tooling inspection base (1) has a strip groove (3) on the lower part of its inner wall. The two sides of the inner wall of the strip groove (3) are rotatably connected to a two-way screw rod (4). The two sides of the arm of the two-way screw rod (4) are threadedly connected to moving blocks (5). The upper surfaces of the two moving blocks (5) are rotatably connected to rotating rods (6). The upper ends of the two rotating rods (6) are rotatably connected to a lifting plate (7). The two sides of the upper surface of the lifting plate (7) are fixedly connected to connecting rods (8). The two sides of the upper surface of the tooling inspection base (1) have two openings (9). The upper ends of the two connecting rods (8) extend to the upper sides of the tooling inspection base (1) through the corresponding two openings (9). The upper ends of the two connecting rods (8) are fixedly connected to a simulation contact panel (10). A cylinder (11) is fixedly connected to the center of the inner wall of the tooling inspection base (1). A through-hole (12) is opened at the center of the upper surface of the lifting plate (7). The output end of the cylinder (11) extends to the top of the lifting plate (7) through the through-hole (12). A lifting rod (13) is fixedly connected to the output end of the cylinder (11). A circular connecting opening (14) is opened at the center of the upper surface of the tooling inspection base (1) and the center of the lower surface of the simulation contact panel (10). A reserved groove (15) is opened on the upper surface of the simulation contact panel (10). The upper end of the lifting rod (13) extends into the reserved groove (15) through the circular connecting opening (14) and is fixedly connected to a simulated protrusion (16). A mounting shell (24) is fixedly connected to one side of the tooling inspection base (1). A reduction motor (25) is fixedly connected to one side of the inner wall of the mounting shell (24). The output end of the reduction motor (25) is fixedly connected to one end of the bidirectional lead screw (4). Guide grooves (26) are provided on both sides of the inner wall of the tooling inspection base (1). Guide blocks (27) are slidably connected to the inner walls of the two guide grooves (26). The opposite ends of the two guide blocks (27) are fixedly connected to the two sides of the lifting plate (7).

2. The fatigue testing fixture for a guide wheel tensioning mechanism according to claim 1, characterized in that: Mounting plates (17) are fixedly connected to both sides of the upper surface of the tooling testing base (1). Threaded rods (18) are threadedly connected to the upper side of the inner wall of the two mounting plates (17). Clamping plates (19) are fixedly connected to the opposite side of the two threaded rods (18). Knobs (20) are fixedly connected to the opposite side of the two threaded rods (18).

3. The fatigue testing fixture for a guide wheel tensioning mechanism according to claim 2, characterized in that: A displacement sensor (21) and a pressure sensor (22) are fixedly connected to the lower side of the two mounting plates (17) respectively. A drive device and a speed sensor are placed on the rear side above the tooling detection base (1). A human-machine interface display screen (23) is fixedly connected to one side of the tooling detection base (1) and one of the mounting plates (17).

4. The fatigue testing fixture and method for a guide wheel tensioning mechanism according to claim 1, characterized in that: S1 places the guide wheel tensioning mechanism (2) above the tooling inspection base (1), and then drives the threaded rod (18) to rotate through the knob (20), so that the threaded rod (18) can cooperate with the clamping plate (19) to clamp the guide wheel tensioning mechanism (2), and then the drive mechanism on the rear side above the tooling inspection base (1) drives the guide wheel tensioning mechanism (2); S2. During the fatigue test of the guide wheel tensioning mechanism (2), the drive equipment is started by an external power supply. Then the geared motor (25) drives the double screw (4) to rotate. The double screw (4) drives the two moving blocks (5) connected by threads to move relative to each other. The two moving blocks (5) drive the lifting plate (7) to rise through the rotating rod (6). The lifting plate (7) drives the simulation contact panel (10) to contact the surface of the guide wheel tensioning mechanism (2) through the connecting rod (8), thereby simulating the friction force of the most realistic use environment. S3. While simulating the real contact surface, the cylinder (11) can drive the lifting rod (13) to rise and fall. The lifting rod (13) can drive the simulated protrusion (16) to apply an upward thrust to the guide wheel tensioning mechanism (2), so that the guide wheel tensioning mechanism (2) is subjected to an upward thrust, thereby achieving a reverse tension effect, so that the guide wheel tensioning mechanism (2) can simulate the data generated under tension during the experiment.

5. The fatigue testing fixture and method for a guide wheel tensioning mechanism according to claim 4, characterized in that: When driven in S1, the speed sensor can guide the wheel tensioning mechanism (2) to detect the speed and transmit the data to the human-machine interface display screen (23) in real time through the line.

6. The fatigue testing fixture and method for a guide wheel tensioning mechanism according to claim 4, characterized in that: In S2, the pressure on the guide wheel tensioning mechanism (2) is detected by the pressure sensor (22), and the detected data can be transmitted to the human-machine interface display screen (23) for display through the line.

7. The fatigue testing fixture and method for a guide wheel tensioning mechanism according to claim 4, characterized in that: In S3, the displacement sensor (21) detects the displacement of the guide wheel tensioning mechanism (2) caused by pressure, and the data can be transmitted to the human-machine interface display screen (23) through the line.

8. The fatigue testing fixture and method for a guide wheel tensioning mechanism according to claim 4, characterized in that: The simulated contact panel (10) in S2 is made of metal sheet that is frequently in contact with the guide wheel tensioner during actual use. The driving range of the geared motor (25) can be adjusted according to the actual installation height of the guide wheel tensioning mechanism (2), so that the simulated contact panel (10) can always contact the lower surface of the guide wheel tensioning mechanism (2).

9. The fatigue testing fixture and method for a guide wheel tensioning mechanism according to claim 4, characterized in that: Before use, all devices in any of steps S1-S3 are connected to an external power source via a power line. Afterward, the corresponding device can be started by turning on the corresponding power switch.

Images