Metal sliding plate friction coefficient tester for bridge support

Abstract

The utility model relates to the technical field of friction performance testing equipment, in particular to a metal sliding plate friction coefficient tester for a bridge support, which comprises a detection table, a bearing device, a sliding device, a sliding plate fixing device and a material fixing device, three sets of material fixing devices are installed at the left end and the right end of the top wall of the detection table in total, the sliding device is installed on the outer wall of the supporting frame, the output end of the sliding device penetrates through the side wall of the supporting frame to be provided with a sensor, and the output end of a lifting air cylinder drives a balancing weight to descend until the balancing weight makes contact with the top wall of a metal sliding plate. A preset pressure is applied, the actual working state of the bridge support is simulated, the sliding device drives the sliding plate fixing device to slide relatively, meanwhile, the first motor drives the threaded rod to rotate to drive the sliding block to move along the same motion trail of the rectangular groove and the sliding device, and the friction condition under the actual working condition is simulated.

Description

Technical Field

[0001] This utility model relates to the technical field of friction performance testing equipment, specifically a friction coefficient tester for a metal sliding plate used in bridge bearings. Background Technology

[0002] As is well known, bridge bearings are a key component of bridge structures, and their performance directly affects the safety and durability of the entire bridge. Among them, metal sliding plates are an important part of bridge bearings, and their friction characteristics are crucial to ensuring the normal operation of the bridge under various working conditions. Therefore, accurately measuring the coefficient of friction between metal sliding plates and other materials is a key aspect of bridge design, material selection, and quality control.

[0003] Many traditional testing devices are unable to accurately simulate the various vertical loads that bridge bearings bear under actual working conditions, resulting in deviations between test results and actual conditions, which limits the application range of the devices. Some testing devices are not secure enough in fixing the metal slide plate and matching materials, which can easily cause the sample to shift or loosen during the test, affecting the accuracy and repeatability of experimental data. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a metal sliding plate friction coefficient tester for bridge bearings.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a metal sliding plate friction coefficient tester for bridge bearings, comprising a testing platform, a bearing device, a sliding device, a sliding plate fixing device, and a material fixing device. A support frame is installed at one end of the top wall of the testing platform. Three sets of the material fixing devices are installed at the left and right ends of the top wall of the testing platform. The sliding device is installed on the outer wall of the support frame. A sensor is installed at the output end of the sliding device, penetrating the side wall of the support frame. The sliding plate fixing device is installed at the end of the sensor furthest from the sliding device. The bottom wall of the support frame is equipped with... The support device includes a groove, a threaded rod, a first motor, a movable seat, a lifting cylinder, and a counterweight. The groove is formed in the bottom wall of the support frame, and the threaded rod is rotatably installed in the groove. The first motor is installed on one side wall of the top wall of the support frame, and the output end of the first motor passes through the side wall of the support frame and is connected to the threaded rod. The movable seat is threaded onto the threaded rod, and the lifting cylinder is installed on the bottom wall of the movable seat. The counterweight is installed at the bottom output end of the lifting cylinder. A control panel is installed on the front side wall of the testing platform.

[0008] To secure the metal skateboard, this invention includes an improved skateboard securing device comprising a rectangular block, a rectangular groove, a bidirectional screw, a second motor, a slider, and a clamping plate. The rectangular block is mounted on the side wall of the sensor, and the rectangular groove is formed at the end of the rectangular block away from the sensor. The bidirectional screw is rotatably mounted within the rectangular groove. The second motor is mounted at one end of the bidirectional screw, which passes through the side wall of the rectangular block. The slider is mounted on both the left and right ends of the bidirectional screw, and the clamping plate is mounted on the outer wall of the slider.

[0009] To fix the corresponding contact material, the present invention is improved by including a fixing frame, a fixing screw, and a fixing plate. The fixing frame is installed on the top wall of the testing table, the fixing screw is threaded onto the top wall of the fixing frame, and the fixing plate is installed at the bottom end of the fixing screw via a bearing.

[0010] Preferably, in this invention, the sliding device is an electric telescopic rod.

[0011] Preferably, the present invention is improved in that the support frame is an L-shaped design.

[0012] Preferably, the improvement of this utility model is that both the first motor and the second motor are servo motors.

[0013] Preferably, the present invention is improved in that support legs are installed at the four corners of the bottom of the testing platform.

[0014] Preferably, an improvement of this utility model is that a knob is installed at the top of the threaded rod.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a metal sliding plate friction coefficient tester for bridge bearings, which has the following advantages:

[0017] This bridge bearing metal sliding plate friction coefficient tester, through its designed bearing device, including a lifting cylinder and counterweight, allows for easy adjustment of the vertical load applied to the metal sliding plate during testing. By adjusting the position of the counterweight or adding / removing it, different stress conditions of the bridge bearing under actual operation can be accurately simulated, thereby improving the accuracy and practicality of the test. The combined design of the threaded rod and the first motor in the bearing device drives the moving seat to a predetermined position along the groove, making it simple and quick to adjust the horizontal position and adapting to different testing needs. The coordinated work of the bearing device and the sliding device can simulate the friction conditions of the bridge bearing metal sliding plate under actual working conditions. The sliding device drives the sliding plate fixing device to slide relative to each other, while the first motor drives the threaded rod to rotate and move related components. This design makes the testing process closer to the actual pressure conditions, improving the reliability of the test results.

[0018] This bridge bearing metal sliding plate friction coefficient tester uses a sliding plate fixing device and a second motor to precisely control the rotation angle and speed of the bidirectional screw, thereby achieving fine adjustment of the clamping plate position. This ensures that the metal sliding plate can be accurately and stably fixed, improving the accuracy of the test results. The design allows for the replacement of metal sliding plates of different sizes and shapes, and the distance between the clamping plates can be easily changed by simply adjusting the bidirectional screw, improving the versatility and flexibility of the equipment.

[0019] The metal sliding plate friction coefficient tester for bridge bearings uses a material fixing device. By manually rotating the fixing screw, the fixing plate moves downward and contacts the surface of the mating material. Appropriate pressure is applied to firmly fix it on the test table, ensuring that the material does not shift or loosen during the entire test. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention from a first angle;

[0021] Figure 2 This is a two-dimensional structural diagram of the present invention from a second angle;

[0022] Figure 3 This is a three-dimensional structural diagram of the present invention from a third angle;

[0023] Figure 4 This is a three-dimensional structural diagram of the bearing device of this utility model.

[0024] In the diagram: 1. Testing platform; 2. Sliding device; 3. Support frame; 4. Sensor; 5. Groove; 6. Threaded rod; 7. First motor; 8. Moving seat; 9. Lifting cylinder; 10. Counterweight; 11. Control panel; 12. Rectangular block; 13. Rectangular groove; 14. Bidirectional screw; 15. Second motor; 16. Slider; 17. Clamping plate; 18. Fixing frame; 19. Fixing screw; 20. Fixing plate; 21. Support leg; 22. Knob. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4A friction coefficient tester for metal sliding plates used in bridge bearings includes a testing platform 1, a bearing device, a sliding device 2, a sliding plate fixing device, and a material fixing device. A support frame 3 is installed at one end of the top wall of the testing platform 1. Three sets of material fixing devices are installed at the left and right ends of the top wall of the testing platform 1. The sliding device 2 is installed on the outer wall of the support frame 3. A sensor 4 is installed at the output end of the sliding device 2, penetrating the side wall of the support frame 3. The sliding plate fixing device is installed at the end of the sensor 4 furthest from the sliding device 2. The bearing device is installed on the bottom wall of the support frame 3. The bearing device includes a groove 5, a threaded rod 6, a first motor 7, and a moving... The support frame 3 includes a seat 8, a lifting cylinder 9, and a counterweight 10. A groove 5 is formed in the bottom wall of the support frame 3, and a threaded rod 6 is rotatably installed within the groove 5. A first motor 7 is installed on one side wall of the top wall of the support frame 3. The output end of the first motor 7 passes through the side wall of the support frame 3 and connects to the threaded rod 6. A movable seat 8 is threaded onto the threaded rod 6. The lifting cylinder 9 is installed on the bottom wall of the movable seat 8, and the counterweight 10 is installed at the bottom output end of the lifting cylinder 9. A control panel 11 is installed on the front side wall of the testing platform 1. In this embodiment, during use, a suitable bridge bearing metal sliding plate sample is selected, and preparations are made accordingly. For the paired materials, the corresponding contact material is first placed on the testing platform 1 and then fixed using three sets of material fixing devices. Next, a suitable bridge bearing metal slide plate sample is fixed to one end of the sensor using the slide plate fixing device. Experimental parameters, including vertical load (by adjusting the position or weight of the counterweight 10) and sliding speed, are set via the control panel 11. The first motor 7 is started, driving the threaded rod 6 to rotate, causing the moving seat 8 to move along the groove 5 to the predetermined position. The lifting cylinder 9 is then activated, and its output end drives the counterweight 10 to descend until it contacts the top wall of the metal slide plate, applying a predetermined pressure to simulate the actual working state of the bridge bearing. The actuator 2 drives the sliding plate fixing device to slide relative to each other. At the same time, the first motor 7 drives the threaded rod 6 to rotate, causing the slider 16 to move along the rectangular groove 13 along the same motion trajectory as the sliding device 2, simulating the friction conditions under actual working conditions. The sensor 4 records the friction force data generated during the friction process in real time. These data are displayed and stored through the control panel 11 for subsequent analysis. By adjusting the position and weight of the counterweight 10, the applied vertical load can be easily changed. Meanwhile, the design of the threaded rod 6 driven by the first motor 7 makes adjusting the horizontal position simple and quick, adapting to different testing needs. The design structure is clear, and each component is modular, facilitating inspection and maintenance.

[0027] In practical use, the metal slide plate is further fixed. In this embodiment, the slide plate fixing device includes a rectangular block 12, a rectangular groove 13, a bidirectional screw 14, a second motor 15, a slider 16, and a clamping plate 17. The rectangular block 12 is installed on the side wall of the sensor 4. The rectangular groove 13 is opened at the end of the rectangular block 12 away from the sensor 4. The bidirectional screw 14 is rotatably installed in the rectangular groove 13. The second motor 15 is installed through the side wall of the rectangular block 12 at one end of the bidirectional screw 14. The slider 16 is installed at both ends of the bidirectional screw 14. The clamping plate 17 is installed on the outer wall of the slider 16. When a suitable bridge bearing metal slide plate sample is placed on the top wall of the corresponding detection material, the sliding device 2 is activated, so that the output end of the sliding device 2 drives the slide plate fixing device to move to the suitable bridge bearing metal slide plate. On one side of the sample, the second motor 15 is started. The output of the second motor 15 drives the bidirectional screw 14 to rotate. The rotation of the bidirectional screw 14 causes the sliders 16 at both ends to face each other along the thread direction. The sliders 16 drive the clamping plates 17 on the outer wall to move synchronously, gradually approaching and finally pressing against both sides of the metal slide plate. When the clamping plates 17 contact the metal slide plate and apply appropriate pressure, the metal slide plate is firmly fixed between the two sets of clamping plates 17, thus fixing the metal slide plate in preparation for subsequent friction coefficient testing. The second motor 15 is used to precisely control the rotation angle and speed of the bidirectional screw 14, thereby achieving fine adjustment of the position of the clamping plates 17, ensuring that the metal slide plate is accurately and stably fixed. This design allows for the replacement of metal slide plates of different sizes and shapes. The distance between the clamping plates 17 can be easily changed by simply adjusting the bidirectional screw 14, improving the versatility and flexibility of the equipment.

[0028] In actual use, the corresponding contact material is further fixed. In this embodiment, the material fixing device includes a fixing frame 18, fixing screws 19, and a fixing plate 20. The fixing frame 18 is installed on the top wall of the testing table 1, and the fixing screws 19 are threaded onto the top wall of the fixing frame 18. The fixing plate 20 is installed at the bottom end of the fixing screws 19 through a bearing. When the corresponding test material is placed on the testing table 1, the three sets of fixing screws 19 are manually rotated to move them downwards through their threaded structure. The bottom of the fixing screws 19 is connected to the fixing plate 20 through a bearing. This ensures that the fixing plate 20 moves smoothly downward in the vertical direction without rotating. As the fixing screw 19 continues to rotate, the fixing plate 20 gradually approaches and eventually contacts the surface of the mating material. Appropriate pressure is applied to firmly fix it on the test table 1. After confirming that the material has been uniformly and fully compressed, the rotation of the fixing screw 19 is stopped, and preparation is made for the subsequent friction coefficient test. The positions of the three sets of material fixing devices are shown in the attached figure. One set is located at the end of the test table 1 away from the sliding device 2 and the fixing frame 18 is longer. The other two sets are installed on the front and rear sides of the other end of the test table 1 and the fixing frames 18 are shorter.

[0029] Preferably, in this embodiment, the sliding device 2 is an electric telescopic rod. The electric telescopic rod can provide very fine position adjustment capability, which is crucial for accurately simulating contact and relative movement under actual working conditions. It allows users to control the sliding distance with micron-level precision, thereby ensuring the consistency and accuracy of each test.

[0030] Preferably, in this embodiment, the support frame 3 is an L-shaped design. The L-shaped structure has an open side design, which facilitates installation, debugging and subsequent maintenance, making it easier for technicians to access each component for inspection or replacement.

[0031] Preferably, in this embodiment, both the first motor 7 and the second motor 15 are servo motors. Servo motors have a fast response time and can be quickly adjusted to the required position, reducing waiting time and improving work efficiency.

[0032] Preferably, in this embodiment, support legs 21 are installed at the four corners of the bottom of the testing platform 1. The design of the support legs 21 helps to distribute the weight of the entire device evenly on the ground, reducing local stress concentration. The support legs 21 installed at the four corners can provide a stable foundation and effectively prevent the device from shaking or tipping over during use.

[0033] Preferably, in this embodiment, a knob 22 is installed at the top of the threaded rod 6. Through the knob 22, the user can easily manually rotate the threaded rod 6 for fine adjustment. The knob 22 provides direct tactile feedback, allowing the operator to intuitively feel the adjustment process and facilitate precise control.

[0034] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0035] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A friction coefficient tester for metal sliding plates used in bridge bearings, comprising a testing platform (1), a bearing device, a sliding device (2), a sliding plate fixing device, and a material fixing device, characterized in that: A support frame (3) is installed at one end of the top wall of the testing platform (1). Three sets of material fixing devices are installed at both ends of the top wall of the testing platform (1). A sliding device (2) is installed on the outer wall of the support frame (3). A sensor (4) is installed through the side wall of the support frame (3) at the output end of the sliding device (2). A sliding plate fixing device is installed at the end of the sensor (4) away from the sliding device (2). A bearing device is installed on the bottom wall of the support frame (3). The bearing device includes a groove (5), a threaded rod (6), a first motor (7), a moving seat (8), a lifting cylinder (9), and a counterweight. (10) The bottom wall of the support frame (3) is provided with the groove (5), and the threaded rod (6) is rotatably installed in the groove (5). The first motor (7) is installed on one side wall of the top wall of the support frame (3). The output end of the first motor (7) passes through the side wall of the support frame (3) and is connected to the threaded rod (6). The movable seat (8) is threaded on the threaded rod (6). The lifting cylinder (9) is installed on the bottom wall of the movable seat (8). The counterweight (10) is installed at the bottom output end of the lifting cylinder (9). The control panel (11) is installed on the front side wall of the testing table (1).

2. The friction coefficient tester for a metal sliding plate used in bridge bearings according to claim 1, characterized in that: The skateboard fixing device includes a rectangular block (12), a rectangular groove (13), a bidirectional screw (14), a second motor (15), a slider (16), and a clamping plate (17). The rectangular block (12) is installed on the side wall of the sensor (4). The rectangular groove (13) is opened at one end of the rectangular block (12) away from the sensor (4). The bidirectional screw (14) is rotatably installed in the rectangular groove (13). The second motor (15) is installed through the side wall of the rectangular block (12) at one end of the bidirectional screw (14). The slider (16) is installed at both the left and right ends of the bidirectional screw (14). The clamping plate (17) is installed on the outer wall of the slider (16).

3. The friction coefficient tester for a metal sliding plate used in bridge bearings according to claim 2, characterized in that: The material fixing device includes a fixing frame (18), a fixing screw (19), and a fixing plate (20). The fixing frame (18) is installed on the top wall of the testing table (1). The fixing screw (19) is threaded onto the top wall of the fixing frame (18). The fixing plate (20) is installed at the bottom end of the fixing screw (19) through a bearing.

4. The friction coefficient tester for a metal sliding plate used in bridge bearings according to claim 3, characterized in that: The sliding device (2) is an electric telescopic rod.

5. The friction coefficient tester for a metal sliding plate used in bridge bearings according to claim 4, characterized in that: The support frame (3) is an L-shaped design.

6. The friction coefficient tester for a metal sliding plate used in bridge bearings according to claim 5, characterized in that: Both the first motor (7) and the second motor (15) are servo motors.

7. The friction coefficient tester for a metal sliding plate used in bridge bearings according to claim 6, characterized in that: The testing platform (1) is equipped with support legs (21) at the four corners of its bottom.

8. The friction coefficient tester for a metal sliding plate used in bridge bearings according to claim 7, characterized in that: A knob (22) is installed at the top of the threaded rod (6).

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