Chair leg static pressure detection device

Abstract

The utility model discloses a chair leg static pressure detection device which comprises a base, a first electric push rod and a fixing frame, the bottom of the first electric push rod is fixedly connected with an adjusting block, the bottom surface of the adjusting block is slidably connected with a sliding block, and the bottom of the sliding block is fixedly connected with a pressing plate; the two ends of the fixing frame are fixedly connected with the lifting blocks on the two sides respectively, second electric push rods are fixedly connected to the surfaces of the sides, facing the center of the base, of the lifting blocks, third electric push rods are fixedly connected to the surfaces of the sides, facing the center of the base, of the fixing frame, and clamping plates are fixedly connected to the telescopic ends of the second electric push rods and the third electric push rods. According to the utility model, the clamping plates are arranged in the four directions of the chair to limit the chair, so that the stability in the detection process is improved.

Description

Technical Field

[0001] This utility model relates to the field of chair leg detection technology, specifically a chair leg static pressure detection device. Background Technology

[0002] Static pressure testing of chair legs is an important quality inspection method for chairs (especially their legs). By simulating the static load conditions that a chair may encounter during actual use, it can test the stability, structural strength, and safety performance of the chair legs under different weights.

[0003] Currently, most static pressure testing equipment simply places the chair directly on the device without securing it. This can cause the chair to slip during the test, affecting the accuracy of the data. Furthermore, some chairs have uneven seat cushions, and the compression structure may not fit against the chair surface during descent, potentially leading to uneven stress and affecting the test results. Utility Model Content

[0004] The purpose of this utility model is to provide a chair leg static pressure testing device, which solves the problems mentioned in the background art, such as placing the chair directly on the device without fixing it, which may cause it to slide during the testing process, affecting the accuracy of the test data, and the fact that the seat cushion of some chairs is not level, and the compression structure does not fit the surface of the chair during the descent, which may lead to uneven force and affect the test results.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a chair leg static pressure detection device, comprising a base, a first electric push rod, and a fixing frame. An adjusting block is fixedly connected to the bottom of the first electric push rod, and a slider is slidably connected to the bottom surface of the adjusting block. A pressure plate is fixedly connected to the bottom of the slider. Both ends of the fixing frame are fixedly connected to lifting blocks on both sides. A second electric push rod is fixedly connected to the surface of the lifting block facing the center of the base, and a third electric push rod is fixedly connected to the surface of the fixing frame facing the center of the base. Clamping plates are fixedly connected to the telescopic ends of both the second and third electric push rods.

[0006] In this technical solution, the second and third electric actuators are activated, bringing their respective clamps closer to the chair to restrain it and maintain stability during the compression process, thus improving the stability of the testing process. At the same time, before testing, the angle of the pressure plate is adjusted according to the tilt of the chair cushion. The slider slides at the bottom of the adjusting block, thereby changing the angle of the pressure plate below during the sliding process. This allows the pressure plate to fit more closely when it descends and contacts the chair cushion, resulting in more even force distribution and improving the accuracy of the test results.

[0007] Preferably, vertical frames are fixedly connected to both sides of the top of the base, and a detection plate is installed in the center of the top of the base. An electric slide rail is fixedly connected between the two vertical frames, and the top of the first electric push rod is fixedly connected to the bottom surface of the sliding component of the electric slide rail.

[0008] Preferably, the sidewall of the adjusting block has a plurality of bolt holes arranged in a circumferential array, and the sidewall of the slider is threaded with a screw rod, which passes through the surface of the slider and is threadedly connected to the adjusting block through the bolt holes.

[0009] Preferably, the side wall of the vertical frame is provided with a vertical groove, and the inner sides of the left and right vertical grooves are respectively rotatably connected to a lead rod and fixedly connected to a slide rod. The surfaces of the lead rod and the slide rod are respectively penetrated by lifting blocks, and the lead rod is threadedly connected to the lifting block, while the slide rod is slidably connected to the lifting block.

[0010] Preferably, a servo motor is fixedly connected to the top of the vertical frame directly above the lead screw, and the output end of the drive shaft of the servo motor is fixedly connected to the top of the lead screw.

[0011] Preferably, the bottom of the pressure plate and the surface of the clamping plate facing the center of the base are both provided with soft padding material, and the second and third electric actuators are located on the same horizontal plane.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model uses a vertical frame and clamps to limit the movement of a chair. The appropriate position is selected according to the chair model for fixing and clamping. The lifting block raises the fixing frame and reaches the appropriate position. Then, the second and third electric push rods are activated, bringing their respective clamps closer to the chair, thereby restricting the chair and keeping it stable during the compression process, thus improving the stability of the detection process.

[0014] 2. This utility model can change the angle of the pressure plate by adjusting the block and the slider. The slider slides at the bottom of the adjusting block, thereby changing the angle of the pressure plate below during the sliding process. This allows the pressure plate to fit more closely when it descends and contacts the chair cushion, making the force more even and improving the accuracy of the test results. Attached Figure Description

[0015] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0016] Figure 1 This is an overall view of the present invention;

[0017] Figure 2 This is a top view of the fixing bracket of this utility model;

[0018] Figure 3 This is a partial enlarged view of point A of this utility model.

[0019] In the diagram: 1. Base; 101. Detection plate; 2. Vertical frame; 3. Electric slide rail; 4. Electric actuator No. 1; 5. Adjusting block; 6. Bolt hole; 7. Slider; 8. Screw; 9. Pressure plate; 10. Vertical groove; 11. Lead screw; 111. Servo motor; 12. Slide rod; 13. Lifting block; 14. Fixing frame; 15. Electric actuator No. 2; 16. Electric actuator No. 3; 17. Clamping plate. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description will further elaborate on them in conjunction with specific embodiments.

[0021] A chair leg static pressure testing device, see Figures 1 to 3 The device includes a base 1, a first electric actuator 4, and a fixing frame 14. An adjusting block 5 is fixedly connected to the bottom of the first electric actuator 4. A slider 7 is slidably connected to the bottom surface of the adjusting block 5. A pressure plate 9 is fixedly connected to the bottom of the slider 7. The slider 7 slides at the bottom of the adjusting block 5, thereby changing the angle of the pressure plate 9 below during the sliding process. This allows the pressure plate 9 to fit more closely and distribute force more evenly when it descends and contacts the chair cushion, resulting in more accurate test results. Both ends of the fixing frame 14 are fixedly connected to lifting blocks 13 on both sides. A second electric actuator 15 is fixedly connected to the surface of the lifting block 13 facing the center of the base 1, and a third electric actuator 16 is fixedly connected to the surface of the fixing frame 14 facing the center of the base 1. Clamping plates 17 are fixedly connected to the telescopic ends of both the second and third electric actuators 15 and 16. When the second and third electric actuators 15 are activated, they move closer to the chair with their respective clamping plates 17, thereby restricting the chair and ensuring its stability during the compression process, thus improving the stability of subsequent testing.

[0022] Specifically, such as Figure 1 As shown, vertical frames 2 are fixedly connected to both sides of the top of the base 1, and a detection plate 101 is installed in the center of the top of the base 1. An electric slide rail 3 is fixedly connected between the two vertical frames 2. The top of the first electric push rod 4 is fixedly connected to the bottom surface of the sliding component of the electric slide rail 3. The first electric push rod 4 can change position under the drive of the electric slide rail 3, thereby adapting to chairs of different sizes.

[0023] It should be noted that when the detection plate 101 is subjected to pressure, its associated pressure sensor will generate a corresponding electrical signal. This electrical signal can be an analog signal or a digital signal, depending on the type and design of the sensor. The computer has corresponding receiving software installed to receive and process these digital signals. The software will perform operations such as decoding, range conversion and calibration of the signal, and finally display the pressure value in graphical or digital form. In scientific research experiments, this system can be used to measure and analyze the performance and behavior of various materials under stress conditions. The technology is relatively mature, and we are only using it here, so we will not go into details.

[0024] Furthermore, such as Figure 3 As shown, the side wall of the adjusting block 5 has several bolt holes 6 arranged in a circular array. The side wall of the slider 7 is threaded with a screw 8. The screw 8 passes through the surface of the slider 7 and is threaded to the adjusting block 5 through the bolt holes 6. After the slider 7 and the pressure plate 9 have been adjusted, the screw 8 can be screwed into the bolt holes 6, so that the slider 7 can be kept stable and the pressure plate 9 can be fixed at the current angle.

[0025] It is worth noting that, such as Figure 1 As shown, the side wall of the vertical frame 2 is provided with a vertical groove 10. The inner sides of the left and right vertical grooves 10 are respectively rotatably connected to a lead screw 11 and fixedly connected to a slide rod 12. The surfaces of the lead screw 11 and the slide rod 12 are respectively penetrated by lifting blocks 13, and the lead screw 11 is threadedly connected to the lifting block 13, and the slide rod 12 is slidably connected to the lifting block 13. The lifting block 13 moves up and down inside the vertical groove 10, thereby changing the height of the fixed frame 14 and the clamp 17, so as to reach a suitable position to limit the chair.

[0026] It is worth noting that, such as Figure 1 As shown, a servo motor 111 is fixedly connected to the top of the vertical frame 2 directly above the lead screw 11. The output end of the drive shaft of the servo motor 111 is fixedly connected to the top of the lead screw 11. After the servo motor 111 is started, it will drive the lead screw 11 to rotate. During the rotation of the lead screw 11, the lifting block 13 will move, thereby adjusting the height of the clamping plate 17.

[0027] It is worth noting that, such as Figure 1 and Figure 2 As shown, the bottom of the pressure plate 9 and the surface of the clamping plate 17 facing the center of the base 1 are both provided with soft padding material, which can provide a certain cushioning when the chair comes into contact with it, so as to avoid damaging or scratching the chair. In addition, the second electric push rod 15 and the third electric push rod 16 are located on the same horizontal plane, so the four clamping plates 17 can be kept horizontal, making the limit clamping more stable.

[0028] In actual use, the chair is placed on the detection plate 101, and then a suitable position is selected according to the chair model for fixing and clamping. The lifting block 13 raises the fixing frame 14. After reaching the appropriate position, the second electric push rod 15 and the third electric push rod 16 are activated, bringing their respective clamping plates 17 closer to the chair, thereby restricting the chair and keeping it stable during the compression process, which improves the stability of the detection process. At the same time, before the detection, the angle of the pressure plate 9 is adjusted according to the tilt of the chair cushion. The slider 7 slides at the bottom of the adjusting block 5, thereby changing the angle of the pressure plate 9 below during the sliding process, so that the pressure plate 9 can fit more closely when it descends and contacts the chair cushion, making the force more even and improving the accuracy of the detection results. After the detection is completed, the chair is removed after contacting the clamping plates 17 in four directions to limit the movement.

[0029] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0030] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A chair leg static pressure testing device, comprising a base (1), a first electric push rod (4), and a fixing frame (14), characterized in that: An adjusting block (5) is fixedly connected to the bottom of the first electric actuator (4), and a slider (7) is slidably connected to the bottom surface of the adjusting block (5). A pressure plate (9) is fixedly connected to the bottom of the slider (7). The two ends of the fixed frame (14) are fixedly connected to the lifting blocks (13) on both sides respectively. A second electric actuator (15) is fixedly connected to the surface of the lifting block (13) facing the center of the base (1). A third electric actuator (16) is fixedly connected to the surface of the fixed frame (14) facing the center of the base (1). The telescopic ends of the second electric actuator (15) and the third electric actuator (16) are both fixedly connected to clamps (17).

2. The chair leg static pressure testing device according to claim 1, characterized in that: The top two sides of the base (1) are fixedly connected to vertical frames (2), and a detection plate (101) is installed in the center of the top of the base (1). An electric slide rail (3) is fixedly connected between the two vertical frames (2), and the top of the first electric push rod (4) is fixedly connected to the bottom surface of the sliding component of the electric slide rail (3).

3. The chair leg static pressure testing device according to claim 1, characterized in that: The sidewall of the adjusting block (5) is provided with a plurality of bolt holes (6) arranged in a circumferential array. The sidewall of the slider (7) is threaded with a screw (8). The screw (8) passes through the surface of the slider (7) and is threadedly connected to the adjusting block (5) through the bolt holes (6).

4. The chair leg static pressure testing device according to claim 2, characterized in that: The side wall of the vertical frame (2) is provided with a vertical groove (10). The inner sides of the two vertical grooves (10) are respectively rotatably connected to a lead screw (11) and fixedly connected to a slide rod (12). The surfaces of the lead screw (11) and the slide rod (12) are respectively penetrated by lifting blocks (13), and the lead screw (11) is threadedly connected to the lifting block (13), and the slide rod (12) is slidably connected to the lifting block (13).

5. The chair leg static pressure testing device according to claim 4, characterized in that: A servo motor (111) is fixedly connected to the top of the vertical frame (2) directly above the lead screw (11), and the output end of the drive shaft of the servo motor (111) is fixedly connected to the top of the lead screw (11).

6. The chair leg static pressure testing device according to claim 1, characterized in that: The bottom of the pressure plate (9) and the surface of the clamping plate (17) facing the center of the base (1) are both covered with soft material, and the second electric push rod (15) and the third electric push rod (16) are located on the same horizontal plane.

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