Static load test device for ladder stool

Abstract

The utility model discloses a bench static load test device, and relates to the technical field of bench test equipment, and the bench static load test device comprises a test bench, the test bench is slidably connected with an installation box, the installation box is connected with a pressure sensor, the pressure sensor is connected with a pressure plate, the test bench is connected with a first driving assembly and a second driving assembly, and the first driving assembly and the second driving assembly are connected with the bench. The first driving assembly is used for driving the mounting box to slide in the Z-axis direction, and the second driving assembly is used for driving the mounting box to slide in the X-axis direction. The first driving assembly drives the pressure plate to slide in the direction close to the stool, the pressure plate abuts against the stool and applies force to the pressure sensor, the pressure sensor can know the pressure value of the pressure, the steps are repeated, and the pressure plate and the pressure sensor test each stool surface of the stool. After the test, the chair does not have obvious damage and permanent deformation, the chair meets the standard, and otherwise, the chair does not meet the standard. And the bench is automatically tested, so that the efficiency of testing the bench is improved.

Description

Technical Field

[0001] The present application relates to the technical field of step stool testing equipment, and in particular to a step stool static load testing device. Background Art

[0002] A step stool can be used as a ladder to help people reach high objects or perform cleaning work at height, or it can be used as a stool to provide a comfortable cushion, or even as a storage box to store some items.

[0003] After a step stool is manufactured, it must be tested for static load. The current testing method involves adding weights directly to the step stool. If the weights reach a certain level and the step stool remains intact, the step stool meets the standard. Otherwise, it fails to meet the standard. This cumbersome process of placing and removing weights compromises testing efficiency and warrants improvement. Utility Model Content

[0004] The purpose of this application is to provide a step stool static load testing device in order to improve the efficiency of chair and stool testing.

[0005] A step stool static load test device provided in the present application adopts the following technical solution: it includes a test bench, the test bench is slidably connected to an installation box, the installation box is connected to a pressure sensor, the pressure sensor is connected to a pressure plate, and the test bench is connected to a first drive assembly and a second drive assembly, the first drive assembly is used to drive the installation box to slide along the Z-axis direction, and the second drive assembly is used to drive the installation box to slide along the X-axis direction.

[0006] By adopting the above technical solution, the chair to be tested is placed on the test bench, and the second drive component drives the mounting box to slide along the X-axis so that the pressure plate corresponds to one of the stool surfaces. The first drive component drives the pressure plate to slide in the direction close to the chair, and the pressure plate contacts the chair and applies force to the pressure sensor. The pressure sensor can obtain the pressure value of the pressure applied. The above steps are repeated, and the pressure plate and pressure sensor test each stool surface. After the test, if the chair has no obvious damage or permanent deformation, the chair meets the standard. Otherwise, the chair does not meet the standard. The use of automated testing of chairs and stools improves the efficiency of chair and stool testing.

[0007] Optionally, the pressure sensor is connected to the installation box via a locking member.

[0008] By adopting the above technical solution, when the pressure sensor is damaged, it is only necessary to loosen the locking piece and the pressure sensor can be removed from the installation box. Only the damaged sensor needs to be replaced, thus saving costs.

[0009] Optionally, a buffer pad is connected to a side of the pressure plate away from the pressure sensor.

[0010] By adopting the above technical solution, the buffer pad can absorb the impact force exerted on the pressure plate and the chair, thereby protecting the pressure plate and the chair.

[0011] Optionally, the pressure sensor is connected to a connecting rod, a connecting ball is provided at one end of the connecting rod away from the pressure sensor, the pressure plate is rotatably connected to the connecting ball, the mounting box is connected to two distance sensors, the two distance sensors correspond to the pressure plate, the test bench is connected to an alarm, and the distance sensor is electrically connected to the alarm.

[0012] By adopting this technical solution, when the test surface of the chair or stool is tilted, the pressure plate rotates around the connecting ball, making the pressure plate fit the test surface. Two distance sensors detect the distance from themselves to the pressure plate, thereby determining the platen's tilt angle. When the platen's tilt angle exceeds the standard, an alarm sounds, indicating that the chair or stool being tested does not meet the standard, thus facilitating the detection of whether the test surface of the chair or stool meets the requirements.

[0013] Optionally, the pressure plate is provided with a rotating groove for rotating with the connecting ball, and the pressure plate is detachably connected to two limit plates, and a through hole for the connecting rod to pass through is formed between the two limit plates, and the radius of the through hole is smaller than the radius of the connecting ball.

[0014] With this technical solution, if the pressure plate is damaged, the two stop plates are removed, and the connecting ball disengages from the rotation groove, separating the pressure plate from the connecting ball. A new pressure plate can then be reinstalled in its place. The stop plates are then reinstalled on the pressure plate, and the connecting ball supports the stop plates and pressure plate. This saves costs by replacing only the damaged pressure plate.

[0015] Optionally, the inner wall of the through hole is in the shape of an inner arc surface, and the outer peripheral surface of the connecting ball is in contact with the inner wall of the through hole.

[0016] By adopting the above technical solution, the inner wall of the through hole is in the shape of an inner arc surface, which prevents the tip of the inner wall of the through hole from contacting the connecting ball, reduces the force applied to the connecting ball, and protects the connecting ball.

[0017] Optionally, the connecting rod is threadedly connected to the pressure sensor.

[0018] By adopting the above technical solution, when the outer surface of the connecting ball is damaged, the connecting rod can be rotated and both the connecting ball and the connecting rod can be detached from the pressure sensor. Only the connecting rod and the connecting ball need to be replaced, which saves costs.

[0019] Optionally, the installation box is connected to two ranging sensors, the test bench is connected to a controller, the ranging sensors, the first drive component and the second drive component are all electrically connected to the controller, the ranging sensors transmit signals to the controller, and the controller receives the signals and transmits the signals to the first drive component.

[0020] By adopting the above technical solution, when both ranging sensors correspond to the surface to be measured of the chair or stool, the ranging sensors transmit signals to the controller, the controller receives the signals and transmits the signals to the first drive component, and the first drive component stops running, so that the pressure plate corresponds to the surface to be measured of the chair or stool.

[0021] Optionally, the test bench is connected to a positioning plate, and the positioning plate is used to abut against the step stool.

[0022] By adopting the above technical solution, the ladder stool is placed on the test bench, and the ladder stool abuts against the side of the positioning plate. The positioning plate plays a role in positioning the position of the ladder stool, so that the ladder stool can be accurately placed in the area to be tested.

[0023] Optionally, the test bench is connected to a plurality of rollers.

[0024] By adopting the above technical solution, the roller can easily move the test bench to other areas.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. The chair to be tested is placed on the test bench. The second drive assembly drives the mounting box to slide along the X-axis so that the pressure plate corresponds to one of the surfaces of the chair. The first drive assembly drives the pressure plate to slide toward the chair. The pressure plate contacts the chair and applies force to the pressure sensor. The pressure sensor can obtain the pressure value of the applied pressure. Repeat the above steps, and the pressure plate and pressure sensor test each surface of the chair. After the test, if there is no obvious damage or permanent deformation on the chair, the chair meets the standard. Otherwise, the chair does not meet the standard. The use of automated testing of chairs and stools improves the efficiency of chair testing.

[0027] 2. When the test surface of the chair or stool is tilted, the pressure plate rotates around the connecting ball to align the pressure plate with the side surface. Two distance sensors detect the distance from the pressure plate to determine the platen's tilt angle. When the platen's tilt angle exceeds the standard, an alarm sounds, indicating that the chair or stool does not meet the standard. This facilitates verification of whether the test surface of the chair or stool meets the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0029] Figure 2It is a schematic diagram of the overall structure of the positioning plate.

[0030] Figure 3 This is one of the cross-sectional views of an embodiment of the present application, showing a first drive assembly.

[0031] Figure 4 This is the second cross-sectional view of the embodiment of the present application, showing the second drive assembly.

[0032] Figure 5 This is the third cross-sectional view of the embodiment of the present application, showing the connecting ball.

[0033] Figure 6 yes Figure 5 Magnified view of area A.

[0034] Explanation of the accompanying drawings: 1. test bench; 11. roller; 12. positioning plate; 13. controller; 14. pressure display; 15. alarm; 2. carrier plate; 3. first drive assembly; 31. first screw rod; 32. first motor; 4. mounting box; 41. distance sensor; 42. distance sensor; 5. second drive assembly; 51. second screw rod; 52. second motor; 6. test assembly; 61. pressure sensor; 62. pressure plate; 621. buffer pad; 622. rotating groove; 63. connecting rod; 631. connecting ball; 64. limit plate; 641. through hole. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1 -Attached Figure 6 This application is described in further detail.

[0036] The embodiment of the present application discloses a step stool static load test device.

[0037] Combine Figure 1 and Figure 2 As shown, the test bench 1 comprises a test bench 1, the bottom of which is fixedly connected to four rollers 11, which are respectively located at the four corners of the test bench 1. The upper surface of the test bench 1 is fixedly connected to a positioning plate 12, which is L-shaped.

[0038] Combine Figure 3 、 Figure 4 and Figure 5As shown, the test bench 1 is slidingly connected to the carrier plate 2, and the test bench 1 is connected to a first drive component 3 for driving the carrier plate 2 to slide along the Z-axis direction. The first drive component 3 includes a first screw rod 31 rotatably connected to the test bench 1 and a first motor 32 for driving the first screw rod 31 to rotate. The first motor 32 is fixedly connected to the test bench 1. The test bench 1 is fixedly connected to the controller 13, and the controller 13 is electrically connected to the first motor 32. One end of the first screw rod 31 close to the first motor 32 is fixedly connected to the output end of the first motor 32. The carrier plate 2 is threadedly connected to the first screw rod 31. The test bench 1 is provided with a sliding groove for sliding cooperation with the carrier plate 2. The carrier plate 2 is slidably connected to the mounting box 4. The carrier plate 2 is connected to a second drive assembly 5 for driving the mounting box 4 to slide along the X-axis. The second drive assembly 5 includes a second screw rod 51 rotatably connected to the carrier plate 2 and a second motor 52 for driving the second screw rod 51 to rotate. The second motor 52 is fixedly connected to the carrier plate 2. The controller 13 is electrically connected to the second motor 52. The end of the second screw rod 51 closest to the second motor 52 is fixedly connected to the output end of the second screw rod 51. The second screw rod 51 is threadedly connected to the mounting box 4. The carrier plate 2 is fixedly connected to a guide block, and the mounting box 4 is provided with a guide groove for slidingly cooperating with the guide block.

[0039] Combine Figure 5 and Figure 6 As shown, the mounting box 4 is connected to a test assembly 6, and the test bench 1 is fixedly connected to a pressure display 14. The test assembly 6 includes a pressure sensor 61 connected to the mounting box 4 and a pressure plate 62 rotatably connected to the pressure sensor 61. The pressure sensor 61 is connected to the mounting box 4 by a locking member (not shown in the drawings), and the locking member is a bolt. The pressure sensor 61 and the pressure display 14 are both electrically connected to the controller 13. The pressure sensor 61 outputs a signal to the controller 13, and the controller 13 receives the signal and displays the value on the pressure display 14. A buffer pad 621 is fixedly connected to the side of the pressure plate 62 away from the pressure sensor 61. The buffer pad 621 is a protective rubber pad. A connecting rod 63 is threadedly connected to the side of the pressure sensor 61 close to the pressure plate 62. A connecting ball 631 is provided at the end of the connecting rod 63 away from the pressure sensor 61. The connecting ball 631 and the connecting rod 63 are integrally formed. The side of the pressure plate 62 near the connecting ball 631 is provided with a rotational groove 622 for rotationally engaging the connecting ball 631. Two stopper plates 64 are detachably connected to the side of the pressure plate 62 near the pressure sensor 61. The stopper plates 64 are bolted to the pressure plate 62. A through-hole 641 is formed between the two stopper plates 64 for the connecting rod 63 to pass through. The radius of the through-hole 641 is smaller than that of the connecting ball 631. The inner wall of the through-hole 641 is an inner curved surface. When the connecting ball 631 is installed in the rotational groove 622, the outer circumference of the connecting ball 631 is in contact with the inner wall of the through-hole 641.

[0040] Combine Figure 5 and Figure 6 As shown, the mounting box 4 is relatively fixedly connected to two distance sensors 41, both of which correspond to the pressure plate 62. The test bench 1 is fixedly connected to the alarm 15, and the distance sensors 41 are electrically connected to the alarm 15. The mounting box 4 is relatively fixedly connected to two distance measuring sensors 42, both of which correspond to the step stools. Both distance measuring sensors 42 are electrically connected to the controller 13. The distance measuring sensors 42 transmit signals to the controller 13, and the controller 13 receives the signals and transmits them to the second motor 52.

[0041] The implementation principle of the static load test device of a step stool in the embodiment of the present application is as follows:

[0042] The stool is placed on the test bench 1, abutting both surfaces of the positioning plate 12 simultaneously, ensuring precise placement in the test area. The controller 13 controls the second motor 52 to turn on, driving the mounting box 4 to slide along the X-axis. This, through the distance sensor 42, positions the pressure plate 62 above the test surface. The controller 13 controls the first motor 32 to turn on, driving the carrier plate 2 to slide toward the stool. This causes the pressure plate 62 to slide toward the stool. The pressure plate 62 abuts the stool and applies force to the pressure sensor 61, which detects the applied pressure. Repeating these steps, the pressure plate 62 and pressure sensor 61 test each surface of the stool. After the test, if the stool shows no visible damage or permanent deformation, it meets the standard. Otherwise, it does not meet the standard. When the test surface of the stool is tilted, the pressure plate 62 rotates around the connecting ball 631, allowing it to align with the side to be tested. The two distance sensors 41 detect the distance between themselves and the pressure plate 62, thereby obtaining the tilt angle of the pressure plate 62. When the tilt angle of the pressure plate 62 exceeds the standard value, the alarm 15 sounds an alarm, and the chair to be tested does not meet the standard.

[0043] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A step stool static load test device, characterized by: The invention comprises a test bench (1), wherein the test bench (1) is slidably connected to an installation box (4), the installation box (4) is connected to a pressure sensor (61), the pressure sensor (61) is connected to a pressure plate (62), and the test bench (1) is connected to a first drive assembly (3) and a second drive assembly (5), wherein the first drive assembly (3) is used to drive the installation box (4) to slide along the Z-axis direction, and the second drive assembly (5) is used to drive the installation box (4) to slide along the X-axis direction.

2. The step stool static load test device according to claim 1, characterized in that: The pressure sensor (61) is connected to the installation box (4) via a locking piece.

3. The step stool static load test device according to claim 1, characterized in that: A buffer pad (621) is connected to a side of the pressure plate (62) away from the pressure sensor (61).

4. The step stool static load test device according to claim 2, characterized in that: The pressure sensor (61) is connected to a connecting rod (63), and a connecting ball (631) is provided at one end of the connecting rod (63) away from the pressure sensor (61). The pressure plate (62) is rotatably connected to the connecting ball (631). The installation box (4) is connected to two distance sensors (41), and the two distance sensors (41) correspond to the pressure plate (62). The test bench (1) is connected to an alarm (15), and the distance sensor (41) is electrically connected to the alarm (15).

5. The step stool static load test device according to claim 4, characterized in that: The pressure plate (62) is provided with a rotation groove (622) for rotationally cooperating with the connecting ball (631). The pressure plate (62) is detachably connected to two limit plates (64). A through hole (641) for the connecting rod (63) to pass through is formed between the two limit plates (64). The radius of the through hole (641) is smaller than the radius of the connecting ball (631).

6. The step stool static load test device according to claim 5, characterized in that: The inner wall of the through hole (641) is in the shape of an inner arc surface, and the outer peripheral surface of the connecting ball (631) is in contact with the inner wall of the through hole (641).

7. The step stool static load test device according to claim 4, characterized in that: The connecting rod (63) is threadedly connected to the pressure sensor (61).

8. The step stool static load test device according to claim 1, characterized in that: The installation box (4) is connected to two distance measuring sensors (42), the test bench (1) is connected to a controller (13), the distance measuring sensors (42), the first drive component (3) and the second drive component (5) are all electrically connected to the controller (13), the distance measuring sensors (42) transmit signals to the controller (13), and the controller (13) receives the signals and transmits the signals to the first drive component (3).

9. The step stool static load test device according to claim 1, characterized in that: The test bench (1) is connected to a positioning plate (12), and the positioning plate (12) is used to abut against a step stool.

10. The step stool static load test device according to claim 1, characterized in that: The test bench (1) is connected to a plurality of rollers (11).

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