A multi-axis stability tester with desk and chair clamping function

Abstract

This utility model discloses a multi-axis stability tester with a desk and chair clamping function, relating to the field of desk and chair clamping technology. It includes a tester body with a placement platform at the center of its top surface. Multiple guide grooves are arranged in a grid pattern on the top surface of the placement platform. First sliders are slidably mounted at both ends of the horizontal guide grooves, and first clamping components are mounted on the top of the first sliders. Second sliders are slidably mounted at both ends of the vertical guide grooves. This utility model uses a bidirectional screw in the first clamping component to drive the relative movement of two first clamping blocks. Combined with the sliding installation of the clamping plate in the slot and the elastic fixing effect of the C-shaped frame and the first spring, it facilitates flexible adjustment of the clamping range and ensures a tight fit according to the width of the two straight, connected desk legs. Ultimately, it solves the problem of unstable clamping and reduced testing accuracy caused by differences in chair leg spacing and shapes in existing testers, improving the stability and accuracy of the test.

Description

Technical Field

[0001] This utility model relates to the field of desk and chair clamping technology, and in particular to a multi-axis stability tester with desk and chair clamping function. Background Technology

[0002] In the field of educational equipment testing, the stability of desks and chairs is an important indicator to ensure the safety of students. Therefore, it is necessary to conduct rigorous testing on them using a multi-axis stability tester. The tester needs to firmly clamp the desks and chairs and simulate the force conditions in different directions in order to accurately obtain stability data.

[0003] Existing multi-axis stability testers typically use fixed-size clamps. However, the spacing between chair legs varies considerably, making it difficult for the clamps to fit snugly, resulting in unstable clamping and affecting test accuracy. Furthermore, table legs come in various shapes, including independent legs at the four corners and integrated legs with two straight sides. The clamps often cannot fit snugly against these different leg shapes, leading to unstable clamping and affecting test accuracy. Therefore, improvements are needed to address these issues. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-axis stability tester with a desk and chair clamping function.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a multi-axis stability tester with a desk and chair clamping function, comprising a tester body, a placement platform provided in the middle of the top surface of the tester body, multiple guide grooves arranged in a grid pattern on the top surface of the placement platform, a first slider slidably provided at both ends of the horizontal guide grooves among the multiple guide grooves, a first clamping component installed at the top of the first slider, and a second slider slidably provided at both ends of the vertical guide grooves among the multiple guide grooves, a second clamping component installed on the top surface of the second slider.

[0006] Preferably, the outer wall of the placement platform is provided with an installation groove at the end of the guide groove, and bolt holes are symmetrically provided on both sides of the installation groove. A limit plate is installed in the installation groove through the bolt holes.

[0007] Preferably, the top surface of the placement platform has multiple mounting holes equidistantly spaced on both sides of the guide groove. The top surfaces of the first slider and the second slider are each provided with a first knob that rotates. The bottom end of the first knob is coaxially fixed to a first screw that rotates inside the first slider and the second slider. The first slider and the second slider are each provided with a lifting groove at the location of the first screw. The lifting groove is provided with a sliding plate sleeved on the first screw. The bottom surface of the sliding plate is symmetrically provided with two docking posts corresponding to the mounting holes. The bottom end of the docking post extends out of the outer wall of the bottom surface of the first slider and the second slider.

[0008] Preferably, the first clamping assembly includes a lead screw groove formed in the middle of the top surface of the first slider, a bidirectional screw is rotatably installed in the lead screw groove, and first clamping blocks are sleeved on the two threaded sections of the bidirectional screw. Two slots are mirror-shaped on the opposite surfaces of the first clamping blocks, and clamping plates are slidably inserted into the two slots. A first slot is formed in the middle of the part of the clamping plate located in the slot. A first locking block is provided in the middle of the bottom surface of each slot. A C-shaped frame is fixed between the two first locking blocks. A push block is fixed on the outer wall of one side of the C-shaped frame. A sliding groove is formed at the push block of the first clamping block. Two first springs installed inside the first slider are symmetrically fixed at the bottom end of the C-shaped frame.

[0009] Preferably, the second clamping assembly includes a rectangular tube, with a second spring provided at each of the four corners of the bottom surface of the rectangular tube, and a pressure plate fixedly connected to the top surface of the second spring. A rectangular groove arranged in a cross pattern is formed on the bottom surface of the inner side of the rectangular tube and the pressure plate. A second clamping block is provided in each of the rectangular grooves. A third spring is fixedly connected to the lower end of the opposite side of each of the second clamping blocks, and one end of the third spring is fixedly connected to the inner wall of the rectangular tube.

[0010] Preferably, a frame is fitted onto the upper end of the rectangular tube, and multiple protrusions are provided on the periphery of the bottom surface of the frame. A pull rope is fixed between the protrusions and the opposite surface of the second clamping block. Multiple buckle slots are equidistantly opened at the lower end of the opposite surface of the frame and the rectangular tube. A spring buckle block is installed in the buckle slot. A corresponding buckle slot is opened on the outer wall of the rectangular tube. Multiple pressing blocks that extend into the buckle slots are provided on the periphery of the pressure plate. The bottom surface of the pressing block is inclined.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model uses the bidirectional screw in the first clamping assembly to drive the two first clamping blocks to move relative to each other. Combined with the sliding installation of the clamping plate in the slot and the elastic fixing effect of the C-shaped frame and the first spring, it is convenient to flexibly adjust the clamping range according to the width of the two straight connected table legs and fit them tightly, which improves the adaptability and clamping stability of the connected table legs, and thus enables reliable fixing of the two straight connected table legs. Then, the sleeve in the second clamping assembly drives the pull rope to pull the second clamping block. Combined with the restoring force of the third spring and the buffering cooperation between the second spring and the pressure plate, it is convenient to adapt to the distribution spacing and shape of the four independent table legs, which improves the fit and clamping stability of the independent table legs, and thus enables stable clamping of the four independent table legs. Finally, it solves the problem that the existing testing instruments are unstable in clamping and affect the testing accuracy due to the difference in the spacing and shape of the chair legs, and improves the stability and accuracy of the test. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0013] Figure 1 This is a first-view schematic diagram of the overall structure proposed in this utility model;

[0014] Figure 2 This is a partial cross-sectional view of the first clamping block proposed in this utility model;

[0015] Figure 3 This is a first-view schematic diagram of a partial cross-sectional structure of the rectangular tube proposed in this utility model.

[0016] Figure 4 This is a second-view schematic diagram of a partial cross-sectional structure of the rectangular tube proposed in this utility model.

[0017] The numbers in the diagram are as follows: 1. Tester body; 2. Placement platform; 3. First clamping block; 4. Second clamping block; 5. Guide groove; 6. First slider; 7. Limiting plate; 8. Mounting hole; 9. Sliding plate; 10. Clamping plate; 11. Sleeve frame; 12. Spring clip; 13. Pressure plate; 14. Lower pressure block; 15. Third spring; 16. Pull rope. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Example: See Figure 1-4This utility model discloses a multi-axis stability tester with a desk and chair clamping function, comprising a tester body 1, a placement platform 2 located at the center of the top surface of the tester body 1, and multiple guide grooves 5 arranged in a grid pattern on the top surface of the placement platform 2. First sliders 6 are slidably mounted at both ends of the horizontal guide grooves 5, with first clamping components mounted on the top of the first sliders 6. Second sliders slidably mounted at both ends of the vertical guide grooves 5, with second clamping components mounted on the top of the second sliders. The tester body 1 is a Tensor18kN high-frequency 6-DOF vibration testing system; the placement platform 2 is made of high-strength aluminum alloy and employs high-strength... The aluminum alloy placement platform 2 is lightweight yet has a high load-bearing capacity, stably supporting desks and chairs of different sizes and ensuring structural stability during testing. This section forms the basic frame of the testing instrument. Through the cooperation of the guide groove 5 with the first slider 6 and the second slider, it provides a basis for adjusting the position of the clamping components, achieving initial adaptation to desks and chairs of different sizes. Mounting grooves are provided on the outer perimeter of the placement platform 2 at the ends of the guide grooves 5. Bolt holes are symmetrically provided on both sides of the mounting grooves, and limit plates 7 are installed in the mounting grooves through the bolt holes. The limit plates 7 are made of Q235 steel, which offers good rigidity and high strength. It can effectively prevent the slider from sliding off the end of the guide groove 5, avoiding the impact on test safety and accuracy due to the slider falling off during the test; the structure, through the limiting plate 7, limits the slider, ensuring the safety and stability of the clamping component during adjustment, and further improving the reliability of the test; the top surface of the placement platform 2 is provided with multiple mounting holes 8 at equal intervals on both sides of the guide groove 5; the top surfaces of the first slider 6 and the second slider are each provided with a first knob that rotates on both sides; the bottom end of the first knob is coaxially fixed to a first screw that rotates inside the first slider 6 and the second slider; the first slider 6 and the second slider are each provided with a lifting groove at the first screw; and a first screw is provided in the lifting groove. The sliding plate 9 on the screw has two symmetrically arranged docking posts with corresponding mounting holes 8 on its bottom surface. The bottom end of the docking posts extends out of the outer wall of the bottom surface of the first slider 6 and the second slider. The sliding plate 9 is made of wear-resistant cast iron. The wear-resistant cast iron material of the sliding plate 9 results in less wear during the operation with the first screw, and can maintain smooth lifting and lowering movements for a long time, ensuring precise docking between the docking posts and the mounting holes 8, and achieving reliable fixation of the slider. This structure, through the cooperation of the first knob, screw and sliding plate 9, realizes the quick fixation of the slider in any position in the guide groove 5, improves the convenience and stability of the position adjustment of the clamping component, and ensures precise adaptation to table legs with different spacing.

[0020] In this utility model, the first clamping assembly includes a screw groove formed in the middle of the top surface of the first slider 6. A bidirectional screw is rotatably installed in the screw groove. A first clamping block 3 is sleeved on each of the two threaded sections of the bidirectional screw. Two slots are mirror-image formed on the opposite surfaces of the first clamping blocks 3. A clamping plate 10 is slidably inserted into the two slots. A first slot is formed in the middle of the part of the clamping plate 10 located in the slot. A first locking block is provided in the middle of the bottom surface of each slot. A C-shaped frame is fixed between the two first locking blocks. A push block is fixed on the outer wall of one side of the C-shaped frame. A sliding groove is formed at the push block of the first clamping block 3. Two first springs installed inside the first slider 6 are symmetrically fixed at the bottom end of the C-shaped frame. The clamping plate 10 is made of engineering plastic. The clamping plate 10 is tough and has a certain degree of elasticity, which reduces wear on the surface of the table legs when clamping them together. Its sliding installation structure allows for easy replacement of clamping plates 10 of different specifications according to the width of the table legs, improving adaptability. This structure adjusts the spacing of the first clamping blocks 3 via a bidirectional screw, and combined with the flexible installation of the clamping plates 10, achieves stable clamping of the two straight connected table legs, improving the adaptability efficiency for connected table legs of different widths. The second clamping component includes a rectangular tube, with second springs at each of the four corners of the bottom surface of the rectangular tube. A pressure plate 13 is fixedly connected to the top surface of each second spring. Rectangular grooves arranged in a cross pattern are formed on the bottom surface of the rectangular tube and on the pressure plate 13. Each rectangular groove contains a second clamping block 4. A third spring 15 is fixedly connected to the lower end of the opposite side of each second clamping block 4. One end of spring 15 is fixed to the inner wall of the rectangular tube; the second clamping block 4 is made of rubber-coated metal. This rubber-coated metal block 4 provides both the rigidity of metal to ensure clamping force and prevents scratches on the table legs through the rubber layer. Simultaneously, the elasticity of the third spring 15 automatically adapts to individual table legs of different thicknesses, enhancing the tightness of the clamping. This structure utilizes the elasticity of the springs and the distribution of the rectangular grooves to achieve adaptive clamping of the four corner table legs, improving the fit and clamping stability for individual table legs of different shapes. A sleeve frame 11 is fitted onto the upper end of the rectangular tube. Multiple protrusions are provided on the circumference of the bottom surface of the sleeve frame 11. A pull rope 16 is fixed between the protrusions and the opposite surface of the second clamping block 4. Multiple... The rectangular tube has a corresponding slot for the spring-loaded locking block 12. Multiple lower pressure blocks 14 extending into the slots are located around the pressure plate 13. The bottom surface of each lower pressure block 14 is inclined. The spring-loaded locking block 12 is made of 65Mn spring steel, which provides good elasticity and strong reset capability. It can accurately cooperate with the slots to position and unlock the frame 11. Combined with the inclined design of the lower pressure block 14, it automatically triggers the clamping action after the table leg is inserted, simplifying the operation process. This structure, through the cooperation of the frame 11, the pull rope 16, and the spring-loaded locking block 12, achieves rapid opening and closing of the second clamping component, improving the clamping efficiency of the four independent table legs and further ensuring the convenience and stability of the test.

[0021] Working principle: When using this utility model, the desks and chairs are placed on the top surface of the placement platform 2, and the corresponding clamping components are selected according to the type of table legs. When testing a desk and chair with two straight, integrated table legs, the first slider 6 is pushed to slide in the horizontal guide groove 5, the first clamping component is adjusted to a suitable position, the first knob is turned to make the first screw drive the sliding plate 9 to descend, allowing the docking post to insert into the mounting hole 8 to fix the first slider 6. Then, the bidirectional screw is turned to drive the two first clamping blocks 3 to move relative to each other until they are close to the table legs, and then the clamping plate 10 is slid along the slot for installation. Under the action of the first spring, the C-shaped frame pushes the first locking block into the first locking slot, completing the fixing of the clamping plate 10 and achieving a stable clamping of the integrated table legs. When testing a desk and chair with four independent table legs, the second slider is moved to slide in the vertical guide groove 5, and the first clamping component is adjusted to a suitable position. The first knob is turned to make the first screw drive the sliding plate 9 to descend, allowing the docking post to insert into the mounting hole 8 to fix the first slider 6. The knob operation fixes the second slider to the docking post. Then, the sleeve frame 11 is pressed down, and the spring clip 12 enters the slot. The protrusion pulls the second clamping block 4 through the pull rope 16 to compress the third spring 15. After the table leg is placed into the rectangular slot, the table leg will press down on the pressure plate 13, which in turn drives the lower pressure block 14 to press down. The inclined design of the lower pressure block 14 will squeeze out the spring clip 12, causing the third spring 15 to release and reset, and push the second clamping block 4 to clamp the table leg. At the same time, the pressure plate 13 adheres to the bottom of the table leg under the action of the second spring, enhancing the clamping stability. After clamping, the main body 1 of the tester is started to simulate multi-directional force to conduct a stability test on the desk and chair. The limiting plate 7 can prevent the slider from slipping from the end of the guide groove 5, ensuring the safety and stability of the test process. After the test, the desk and chair can be removed by reversing the operation of each component. At this point, the device is used.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A multi-axis stability tester with desk and chair clamping function, comprising a tester body (1), characterized in that: The tester body (1) has a placement platform (2) in the middle of its top surface. The top surface of the placement platform (2) has multiple guide grooves (5) arranged in a grid pattern. The two ends of the horizontal guide grooves (5) are provided with first sliders (6). The top of the first sliders (6) is equipped with a first clamping component. The two ends of the vertical guide grooves (5) are provided with second sliders. The top surface of the second sliders is equipped with a second clamping component.

2. The multi-axis stability tester with desk and chair clamping function according to claim 1, characterized in that: The outer wall of the placement platform (2) is provided with an installation groove at the end of the guide groove (5). Bolt holes are symmetrically provided on both sides of the installation groove. A limit plate (7) is installed in the installation groove through the bolt holes.

3. The multi-axis stability tester with desk and chair clamping function according to claim 2, characterized in that: The top surface of the placement platform (2) is provided with multiple mounting holes (8) at equal intervals on both sides of the guide groove (5). The top surfaces of the first slider (6) and the second slider are provided with a first knob that rotates. The bottom end of the first knob is coaxially fixed with a first screw that rotates inside the first slider (6) and the second slider. The first slider (6) and the second slider are provided with a lifting groove at the first screw. The lifting groove is provided with a sliding plate (9) sleeved on the first screw. The bottom surface of the sliding plate (9) is symmetrically provided with two docking posts corresponding to the mounting holes (8). The bottom end of the docking post extends out of the outer wall of the bottom surface of the first slider (6) and the second slider.

4. A multi-axis stability tester with desk and chair clamping function according to claim 3, characterized in that: The first clamping assembly includes a screw groove in the middle of the top surface of the first slider (6). A bidirectional screw is rotatably installed in the screw groove. A first clamping block (3) is sleeved on each of the two threaded sections of the bidirectional screw. Two slots are mirror-imagely opened on the opposite surfaces of the first clamping blocks (3). A clamping plate (10) is slidably inserted into the two slots. A first slot is opened in the middle of the part of the clamping plate (10) located in the slot. A first locking block is provided in the middle of the bottom surface of the slot. A C-shaped frame is fixed between the two first locking blocks. A push block is fixed on the outer wall of one side of the C-shaped frame. A sliding groove is opened at the push block of the first clamping block (3). Two first springs installed inside the first slider (6) are symmetrically fixed at the bottom end of the C-shaped frame.

5. A multi-axis stability tester with desk and chair clamping function according to claim 4, characterized in that: The second clamping assembly includes a rectangular tube. A second spring is provided at each of the four corners of the bottom surface of the rectangular tube. A pressure plate (13) is fixedly connected to the top surface of the second spring. A rectangular groove arranged in a cross pattern is opened on the bottom surface of the rectangular tube and the pressure plate (13). A second clamping block (4) is provided in each of the rectangular grooves. A third spring (15) is fixedly connected to the lower end of the opposite side of the second clamping block (4). One end of the third spring (15) is fixedly connected to the inner wall of the rectangular tube.

6. A multi-axis stability tester with desk and chair clamping function according to claim 5, characterized in that: The upper end of the rectangular tube is fitted with a sleeve frame (11). The bottom surface of the sleeve frame (11) is provided with multiple protrusions. A pull rope (16) is fixed between the protrusion and the opposite surface of the second clamping block (4). Multiple buckle slots are equidistantly opened at the lower end of the opposite surface of the sleeve frame (11) and the rectangular tube. A spring buckle block (12) is installed in the buckle slot. A corresponding buckle slot is opened on the outer wall of the rectangular tube. Multiple lower pressure blocks (14) extending into the buckle slots are provided on the periphery of the pressure plate (13). The bottom surface of the lower pressure block (14) is inclined.

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