Scissor fork type aerial work platform anti-extrusion system
By installing pressure sensors and protective components on the self-travel scissor type aerial work platform, the anti-squeezing and anti-capsulse functions are achieved, and the problems of injury and capsulse during the lifting of the platform are solved, improving safety and stability of the operating environment.
Patent Information
- Application Number
- CN202510730147.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-03
- Publication Date
- 2025-07-18
AI Technical Summary
The existing self-travel scissor type aerial work platform is prone to being squeezed and injured by operating errors or colliding with obstacles during lifting and lowering. The existing limit detection method is not ideal.
Pressure sensors are used to monitor pressure changes on the platform, combined with a central controller and an additional assembly, the height of the guardrail is automatically or manually adjusted to prevent squeezing and overturning, and the operator and ground monitoring are prompted through an acousto-optical alarm.
It effectively reduces the degree of injury to people during lifting, reduces the risk of collision and overturning between platforms and obstacles, and improves driving safety and sense of security in the operating environment.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of aerial work platforms, and specifically relates to an anti-pinch system for a scissor-type aerial work platform. Background Technique
[0002] An aerial work platform is a piece of aerial work equipment that can transport operators and a certain amount of tools or materials to the target location, and is widely used in construction, equipment maintenance, venue layout, construction and maintenance of urban infrastructure, etc. A self-propelled scissor-type aerial work platform is a widely used aerial work equipment, and the operator can use the upper control operating handle to perform actions such as walking, lifting, and turning.
[0003] During the ascent of the existing self-propelled scissor-type aerial work platform, abnormal events such as personnel on the platform being pinched and injured due to operating errors or the platform tipping over due to interference from obstacles may occur. Currently, in order to prevent such problems from occurring, most of the measures taken are to control by installing mechanical limiters or electronic limiters on the railing of the work platform. However, since the stroke limiter can only detect a certain point and cannot detect obstacles at other positions of the platform, the actual use effect is not ideal. Therefore, the present invention provides an anti-pinch system for a scissor-type aerial work platform. Summary of the Invention
[0004] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background technique.
[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: An anti-pinch system for a scissor-type aerial work platform according to the present invention includes a scissor-type aerial work platform body. The scissor-type aerial work platform body includes a traveling device, a telescopic bracket is fixedly installed on the top of the traveling device, a hydraulic cylinder is fixedly installed inside the telescopic bracket, and a support platform is fixedly installed on the top of the telescopic bracket.
[0006] A central controller is fixedly installed inside the traveling device, a control valve group is fixedly installed on the hydraulic cylinder, a pressure sensor is fixedly installed on the hydraulic cylinder, the pressure sensor is installed at the outlet end of the control valve group, a protective railing is fixedly connected to the top of the support platform, a protection component is arranged on the protective railing, a control handle is fixedly installed inside the protective railing, an audible and visual alarm is fixedly installed on the rear surface of the support platform, and the pressure sensor, the control handle, the control valve group and the audible and visual alarm are all electrically connected to the central controller.
[0007] Preferably, the intensive care component includes four sliding sleeves respectively arranged on the outer surfaces of the four rods at the top of the guardrail. A support rod is installed inside the sliding sleeve through an adjustment component. Four guard rods are arranged between the four support rods. An "O" shape is formed between the four support rods and the four guard rods. A moving component is arranged between the sliding sleeve and the guardrail.
[0008] Preferably, the moving component includes two fixed rods respectively penetrating and fixed in the front and rear of the guardrail. An installation groove is opened inside the fixed rod. The upper surface inside the installation groove extends to the outside of the fixed rod. An electric lifting rod is fixedly installed inside the installation groove. The electric lifting rod is electrically connected to the central controller. The output end of the electric lifting rod is fixedly connected with a moving plate. The left and right sides of the moving plate are respectively fixedly connected with the outer surfaces of the two sliding sleeves.
[0009] Preferably, the bottom of the moving plate is in contact with the top of the fixed rod. The front and rear of the left side of the guardrail respectively penetrate the two sliding sleeves on the left side, and the guardrail is slidably connected with the sliding sleeve.
[0010] Preferably, the adjustment component includes an inner groove opened inside the support rod. A through groove is opened on the lower surface inside the inner groove. Two limiting plates are arranged between the inside of the through groove and the inside of the inner groove through a rotating component. A rubber pad is fixedly connected to one side of the limiting plate. One side of the rubber pad is in contact with the inner side wall of the sliding sleeve.
[0011] Preferably, the rotating component includes two spur gears respectively arranged in the front and rear of the inner groove. The spur gears are rotationally connected with the inner groove through a rotating rod. The rotating rod penetrates the limiting plate and is fixedly connected with the limiting plate. A rack is commonly meshed and connected between the two spur gears. The rack is installed between the support rod through a limiting component.
[0012] Preferably, a guiding groove is opened on the lower surface inside the through groove. A guiding block is slidably connected inside the guiding groove. A guiding rod is fixedly connected to the top of the guiding block. The guiding rod is fixedly connected with the rack.
[0013] Preferably, the limiting component includes a threaded hole opened on the upper surface inside the inner groove and penetrating through. A threaded rod is threadedly connected inside the threaded hole. The bottom end of the threaded rod is installed with the rack through a connecting component. The top end of the threaded rod extends to the top of the support rod. A handle plate is fixedly connected to the top end of the threaded rod.
[0014] Preferably, the connecting component includes a groove opened on the top of the rack. A connecting rod is rotationally connected inside the groove through a bearing. The connecting rod is fixedly connected with the threaded rod.
[0015] The beneficial effects of the present invention are as follows:
[0016] 1. A scissor lift anti - extrusion system according to the present invention enables the scissor lift platform body to have the function of anti - extrusion in the vertical direction through the monitoring of pressure sensors. It can effectively reduce the degree of injury to personnel after being extruded during the lifting process, reduce the situation of the scissor lift platform body tipping over due to collision with obstacles, and improve driving safety.
[0017] 2. A scissor lift anti - extrusion system according to the present invention, when the anti - extrusion system is triggered, the central controller can synchronously control the operation of the reinforcement components on the guardrail. And through the reinforcement components, the protection range of the guardrail can be increased. Thus, when the scissor lift platform body is extruded in the vertical direction during operation, by automatically increasing the height of the guardrail, it can provide additional protection for the staff when the support platform is unstable, prevent personnel from slipping or being injured due to accidental shaking or tilting of the platform, and can enhance the sense of security in the operating environment, providing better protection for the staff in case of emergencies.
[0018] 3. A scissor lift anti - extrusion system according to the present invention, the reinforcement components also have the function of manually adjusting and increasing the protection range of the guardrail, and the manual adjustment and automatic adjustment do not interfere with each other. Therefore, the protection height of the guardrail can be increased as needed, and thus more usage requirements can be met. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a perspective view of the present invention.
[0020] Figure 2 is a right view of the present invention.
[0021] Figure 3 is a partial front cross - sectional view of the present invention.
[0022] Figure 4 is Figure 3 the enlarged view of part A in
[0023] Figure 5 is a partial left cross - sectional view of the present invention.
[0024] Figure 6 is Figure 5 the enlarged view of part B in
[0025] In the figure: 1. Scissor-type aerial work platform body; 2. Support platform; 3. Guardrail; 4. Sliding sleeve; 5. Protection bar; 6. Moving plate; 7. Pressure sensor; 8. Control valve group; 9. Central controller; 10. Control handle; 11. Handle plate; 12. Support rod; 13. Fixed rod; 14. Hydraulic cylinder; 15. Installation groove; 16. Electric lifting rod; 17. Threaded rod; 18. Threaded hole; 19. Inner groove; 20. Rotating rod; 21. Limiting plate; 22. Rubber pad; 23. Through groove; 24. Guide rod; 25. Guide block; 26. Guide groove; 27. Rack; 28. Spur gear; 29. Groove; 30. Connecting rod; 31. Acoustic and optical alarm. Detailed implementation manners
[0026] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.
[0027] As Figures 1 to 6 shown, a scissor-type aerial work platform anti-pinch system according to an embodiment of the present invention includes a scissor-type aerial work platform body 1. The scissor-type aerial work platform body 1 includes a traveling device. A telescopic bracket is fixedly installed on the top of the traveling device. A hydraulic cylinder 14 is fixedly installed inside the telescopic bracket. A support platform 2 is fixedly installed on the top of the telescopic bracket;
[0028] A central controller 9 is fixedly installed inside the walking device. A control valve group 8 is fixedly installed on the hydraulic cylinder 14. A pressure sensor 7 is fixedly installed on the hydraulic cylinder 14. The pressure sensor 7 is installed at the outlet end of the control valve group 8. A guardrail 3 is fixedly connected to the top of the support platform 2. A protection component is arranged on the guardrail 3. A control handle 10 is fixedly installed inside the guardrail 3. An audible and visual alarm 31 is fixedly installed on the rear surface of the support platform 2. The pressure sensor 7, the control handle 10, the control valve group 8 and the audible and visual alarm 31 are all electrically connected to the central controller 9; during operation, the scissor-type aerial work platform body 1 enables the staff to perform aerial work. The walking device facilitates lateral movement. The hydraulic cylinder 14 cooperates with the telescopic support to facilitate height adjustment. Then, the support platform 2 provides a standing platform for the staff. The guardrail 3 protects the people standing on the support platform 2. The door rotatably installed on the right side of the guardrail 3 facilitates the opening and closing of the guardrail 3. When the staff is on the support platform 2, the scissor-type aerial work platform body 1 can be controlled through the control handle 10. The monitoring by the pressure sensor 7 enables the scissor-type aerial work platform body 1 to have an anti-crushing system in the vertical direction, which can effectively reduce the degree of injury to personnel after being crushed during the lifting process, reduce the situation of the scissor-type aerial work platform body 1 tipping over due to collision with obstacles, and improve driving safety. Since the pressure sensor 7 is installed at the outlet end of the control valve group 8, and the pressure sensor 7 and the control handle 10 are connected to the input end of the central controller 9, and the output end of the central controller is connected to the control valve group 8 and the audible and visual alarm 31, when the control handle 10 is switched to the lifting and lowering mode, the anti-crushing system starts to work. The central controller 9 analyzes the pressure of the lifting system returned by the pressure sensor 7, and can be monitored through the pressure sensor 7. When the support platform 2 is blocked by extrusion during the rising (falling) process, the pressure of the lifting system of the scissor-type aerial work platform body 1 will suddenly increase. When the pressure fluctuation value exceeds the set threshold (considering the stability of the system and reducing the degree of injury to personnel, it can be set to 0.1 - 0.After reaching 15 Mpa, the anti - extrusion mode is triggered, and the central controller 9 forcibly stops ascending (descending), and gives a 1 s - 2 s descending (ascending) signal to release the squeezed person or obstacle, and continuously emits an audible and visual alarm signal to prompt the operator and the ground supervisor. When the central controller 9 triggers the anti - extrusion mode, the lifting action function of the control handle 10 fails and needs to restart the system to recover. After restarting, subsequent use can be carried out. At the same time, when the anti - extrusion system is triggered, the central controller 9 can synchronously control the protection components on the guardrail 3 to work, and through the protection components, the protection range of the guardrail 3 can be increased. Thus, when the scissor - type aerial work platform body 1 is squeezed in the vertical direction during operation, by automatically increasing the height of the guardrail 3, additional protection can be provided for the staff when the support platform 2 is unstable, preventing personnel from slipping or being injured due to accidental shaking or tilting of the platform, and enhancing the sense of security in the operation environment, providing better protection for the staff in case of emergencies. When restarted, the protection components will also return to their original positions. The protection components also have the function of manually adjusting to increase the protection range of the guardrail 3, and the manual adjustment and automatic adjustment do not interfere with each other. Therefore, the protection height of the guardrail 3 can be increased as needed, and thus more usage requirements can be met.
[0029] As a preferred embodiment of the present invention, the protection components include four sliding sleeves 4 respectively arranged on the outer surfaces of the four rods at the top of the guardrail 3. A support rod 12 is installed inside the sliding sleeve 4 through an adjustment component. Four protection rods 5 are arranged between the four support rods 12. A square shape is formed between the four support rods 12 and the four protection rods 5. A moving component is arranged between the sliding sleeve 4 and the guardrail 3. During operation, the moving component drives the sliding sleeve 4 to slide on the guardrail 3, and after the sliding sleeve 4 slides, it drives the support rod 12 and the protection rod 5 to rise as a whole, and the overall protection height on the support platform 2 can be increased. Therefore, when the scissor - type aerial work platform body 1 is squeezed in the vertical direction to trigger the anti - extrusion system, the central controller 9 can control the moving component to work. At the same time, the height of the support rod 12 and the protection rod 5 can be manually adjusted through the adjustment component, and the protection height on the support platform 2 can be adjusted as needed.
[0030] As a preferred embodiment of the present invention, the moving component includes two fixed rods 13 respectively passing through and fixed at the front and rear of the guardrail 3, the fixed rod 13 is provided with a mounting groove 15, the upper surface of the mounting groove 15 extends to the outside of the fixed rod 13, an electric lifting rod 16 is fixedly installed inside the mounting groove 15, the electric lifting rod 16 is electrically connected to the central controller 9, the output end of the electric lifting rod 16 is fixedly connected to a moving plate 6, and the left and right sides of the moving plate 6 are respectively fixedly connected to the outer surfaces of the two sliding sleeves 4; when working, the electric lifting rod 16 is energized and operated by the central controller 9, and the electric lifting rod 16 drives the moving plate 6 to move, and then the moving plate 6 drives the sliding sleeve 4, the support rod 12 and the guard rod 5 to move as a whole after moving, and the overall protection height on the support platform 2 is improved, and after restarting, the electric lifting rod 16 is controlled to drive the sliding sleeve 4, the support rod 12 and the guard rod 5 to descend as a whole.
[0031] As a preferred embodiment of the present invention, the bottom of the movable plate 6 is fitted with the top of the fixed rod 13, the front and rear of the left side of the guardrail 3 respectively penetrate the two sliding sleeves 4 on the left side, and the guardrail 3 is slidably connected with the sliding sleeve 4; when working, the movable plate 6 can be separated from the fixed rod 13, and the sliding sleeve 4 can slide on the guardrail 3.
[0032] As a preferred embodiment of the present invention, the adjustment component includes an inner groove 19 opened inside the support rod 12, and a through-type through groove 23 is opened on the lower surface of the inner groove 19. Two limit plates 21 are arranged between the inside of the through groove 23 and the inside of the inner groove 19 through a rotating component. A rubber pad 22 is fixedly connected to one side of the limit plate 21, and one side of the rubber pad 22 is in contact with the inner wall of the sliding sleeve 4. When working, the limit plate 21 and the rubber pad 22 are firmly in contact with the inner wall of the sliding sleeve 4 through the rotating component, and the support rod 12 and the sliding sleeve 4 are firmly limited and installed through the limit plate 21 and the rubber pad 22. When it is necessary to manually adjust the height of the support rod 12 and the protective rod 5, one person first rotates the component to make the limit plate 21 and the rubber pad 22 firmly in contact with the inner wall of the sliding sleeve 4. The plate 21 and the rubber pad 22 are separated from the tight fit with the sliding sleeve 4, and then the other side lifts the protective rod 5 and the support rod 12 as a whole so that the support rod 12 slides inside the sliding sleeve 4, and when it is adjusted to a suitable height, the limiting plate 21 is made to fit tightly with the rubber pad 22 and the inner wall of the sliding sleeve 4 by rotating the assembly to firmly limit the moving position of the support rod 12 and the protective rod 5. At the same time, the friction between the rubber pad 22 and the inner wall of the sliding sleeve 4 is relatively large after being fitted together, and the squeezing force of the limiting plate 21 is added so that the limiting plate 21 and the rubber pad 22 can firmly limit the position of the support rod 12 and the protective rod 5, and the support rod 12 and the protective rod 5 can maintain a stable position after the position is manually adjusted, so the automatic adjustment and manual adjustment of the protection assembly do not affect each other.
[0033] As a preferred embodiment of the present invention, the rotating assembly includes two spur gears 28 respectively arranged in the front and rear of the inner groove 19. The spur gears 28 are rotatably connected to the inner groove 19 through rotating rods 20. The rotating rods 20 penetrate through the limiting plates 21 and are fixedly connected to the limiting plates 21. A rack 27 is meshed and connected between the two spur gears 28. The rack 27 is installed between the support rod 12 through a limiting component. During operation, the limiting component can drive the rack 27 to move, and the movement of the rack 27 drives the two spur gears 28 to rotate simultaneously. Then, the two spur gears 28 rotate simultaneously to drive the rotating rods 20 and the limiting plates 21 to rotate. And the rotation of the limiting plate 21 can make the limiting plate 21 fit tightly or disengage from the rubber pad 22 and the inside of the sliding sleeve 4.
[0034] As a preferred embodiment of the present invention, a guiding groove 26 is opened on the lower surface inside the through groove 23. A guiding block 25 is slidably connected inside the guiding groove 26. The top of the guiding block 25 is fixedly connected to a guiding rod 24. The guiding rod 24 is fixedly connected to the rack 27. During operation, the sliding connection between the guiding rod 24, the guiding block 25 and the guiding groove 26 limits the movement of the rack 27, and makes the movement of the rack 27 more stable, so that the rotation of the spur gear 28 and the limiting plate 11 is also more stable.
[0035] As a preferred embodiment of the present invention, the limiting component includes a threaded hole 18 opened on the upper surface inside the inner groove 19 and penetrating through. A threaded rod 17 is threadedly connected inside the threaded hole 18. The bottom end of the threaded rod 17 is installed with the rack 27 through a connecting component. The top end of the threaded rod 17 extends to the top of the support rod 12. A handle plate 11 is fixedly connected to the top end of the threaded rod 17. During operation, the handle plate 11 drives the threaded rod 17 to rotate and move inside the threaded hole 18, and the rotation and movement of the threaded rod 17 drive the rack 27 to move under the limitation of the connecting component, and enable the rack 27 to move up and down. Thus, the up and down movement of the rack 27 drives the rotation and fitting and disengagement of the spur gear 28, the limiting plate 21 and the rubber pad 22.
[0036] As a preferred embodiment of the present invention, the connecting component includes a groove 29 opened on the top of the rack 27. A connecting rod 30 is rotatably connected inside the groove 29 through a bearing. The connecting rod 30 is fixedly connected to the threaded rod 17. During operation, the rotational connection between the connecting rod 30 and the rack 27 enables the threaded rod 17 to drive the rack 27 to move through the connecting rod 30 when rotating.
[0037] The above front, rear, left, right, up, and down are all based on the Figure 1 in the attached drawings of the specification. Taking the perspective of the person observing as the standard, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.
[0038] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention.
[0039] The above has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.
Claims
1. A shear fork type aerial work platform anti - extrusion system, including a shear fork type aerial work platform body (1), the shear fork type aerial work platform body (1) includes a traveling device, a telescopic bracket is fixedly installed on the top of the traveling device, a hydraulic cylinder (14) is fixedly installed inside the telescopic bracket, and a support platform (2) is fixedly installed on the top of the telescopic bracket; It is characterized in that: A central controller (9) is fixedly installed inside the traveling device, a control valve group (8) is fixedly installed on the hydraulic cylinder (14), a pressure sensor (7) is fixedly installed on the hydraulic cylinder (14), the pressure sensor (7) is installed at the outlet end of the control valve group (8), a guardrail (3) is fixedly connected to the top of the support platform (2), a reinforcement component is arranged on the guardrail (3), a control handle (10) is fixedly installed inside the guardrail (3), an audible and visual alarm (31) is fixedly installed on the rear surface of the support platform (2), and the pressure sensor (7), the control handle (10), the control valve group (8) and the audible and visual alarm (31) are all electrically connected to the central controller (9).
2. The anti - extrusion system of a scissor - type aerial work platform according to claim 1, wherein: The reinforcement component includes four sliding sleeves (4) respectively arranged on the outer surfaces of the four rods at the top of the guardrail (3), a support rod (12) is installed inside the sliding sleeve (4) through an adjustment component, four guard rods (5) are arranged between the four support rods (12), an "O" - shaped structure is formed between the four support rods (12) and the four guard rods (5), and a moving component is arranged between the sliding sleeve (4) and the guardrail (3).
3. The anti-pinch system of a scissor-type aerial work platform according to claim 2, characterized in that: The moving component includes two fixed rods (13) respectively penetrating and fixed inside the front and rear of the guardrail (3), an installation groove (15) is opened inside the fixed rod (13), the upper surface inside the installation groove (15) extends to the outside of the fixed rod (13), an electric lifting rod (16) is fixedly installed inside the installation groove (15), the electric lifting rod (16) is electrically connected to the central controller (9), the output end of the electric lifting rod (16) is fixedly connected to a moving plate (6), and the left and right sides of the moving plate (6) are respectively fixedly connected to the outer surfaces of the two sliding sleeves (4).
4. The anti-pinch system of a scissor-type aerial work platform according to claim 3, characterized in that: The bottom of the moving plate (6) is in contact with the top of the fixed rod (13), the front and rear of the left side of the guardrail (3) respectively penetrate the two sliding sleeves (4) on the left side, and the guardrail (3) is slidably connected to the sliding sleeve (4).
5. The anti - extrusion system of a scissor - type aerial work platform according to claim 4, wherein: The adjustment component includes an inner groove (19) opened inside the support rod (12), a through - type through - slot (23) is opened on the lower surface inside the inner groove (19), two limiting plates (21) are arranged between the inside of the through - slot (23) and the inside of the inner groove (19) through a rotating component, a rubber pad (22) is fixedly connected to one side of the limiting plate (21), and one side of the rubber pad (22) is in contact with the inner side wall of the sliding sleeve (4).
6. The anti-pinch system of a scissor-type aerial work platform according to claim 5, characterized in that: The rotating assembly includes two spur gears (28) respectively arranged at the front and rear inside the inner groove (19). The spur gears (28) are rotatably connected to the inner groove (19) through rotating rods (20). The rotating rods (20) penetrate through the limiting plates (21) and are fixedly connected to the limiting plates (21). A rack bar (27) is meshed and connected between the two spur gears (28). The rack bar (27) is installed between the support rod (12) through a limiting component.
7. The anti-pinch system of a scissor-type aerial work platform according to claim 6, characterized in that: A guide groove (26) is formed on the lower surface inside the through groove (23). A guide block (25) is slidably connected inside the guide groove (26). A guide rod (24) is fixedly connected to the top of the guide block (25). The guide rod (24) is fixedly connected to the rack bar (27).
8. The anti - extrusion system of a scissor - type aerial work platform according to claim 7, characterized in that: The limiting component includes a threaded hole (18) formed on the upper surface inside the inner groove (19) and penetrating through. A threaded rod (17) is threadedly connected inside the threaded hole (18). The bottom end of the threaded rod (17) is installed with the rack bar (27) through a connecting component. The top end of the threaded rod (17) extends to the top of the support rod (12). A handle plate (11) is fixedly connected to the top end of the threaded rod (17).
9. The anti - extrusion system for a scissor - type aerial work platform according to claim 8, wherein: The connecting component includes a groove (29) formed on the top of the rack bar (27). A connecting rod (30) is rotatably connected inside the groove (29) through a bearing. The connecting rod (30) is fixedly connected to the threaded rod (17).