Anti-collision device of aerial work platform
By designing a self-locking component for the anti-collision device on the aerial work platform, the safety hazard caused by the lifting boom breaking due to excessive impact is solved, ensuring that the limit switch is continuously triggered to prevent the platform from continuing to rise, thus improving operational safety.
Patent Information
- Application Number
- CN202522217926.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-21
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-10-21
AI Technical Summary
If the lifting boom breaks due to excessive impact, the wireless limit switch of the existing aerial work platform may lose its trigger pressure, which may cause the platform to continue to rise, posing a safety risk.
An anti-collision device was designed, including a convex mounting bracket, a lifting groove, a top plate, a limit switch, a triggering component, and a self-locking component. The self-locking component maintains the triggering state of the limit switch when the lifting rod breaks, preventing the platform from continuing to rise.
This effectively avoids safety accidents caused by broken lifting masts and improves the operational safety of aerial work platforms.
Smart Images
Figure CN224677755U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aerial work platform protection technology, specifically an anti-collision device for aerial work platforms. Background Technology
[0002] Aerial work platforms are mobile work platforms used for various industries, including high-altitude operations, equipment installation, and maintenance. The anti-collision limiters on the top of the platform are crucial for ensuring operational safety. They warn of or stop the platform when it approaches obstacles, preventing collisions. Wireless limiters are one of the commonly used anti-collision devices for aerial work platforms, and their structure and principle are as follows. It typically consists of a lifting rod, limit sensors (such as limit switches), lifting solenoid valves, and a drive mechanism. The lifting rod can be raised and lowered, and the limit sensors send signals when they touch an obstacle, which stops the platform's movement through the control system. It has a high degree of automation, can automatically raise and lower, and can effectively protect personnel safety and reduce the risk of damage to the device itself. In practical use, the wireless limit switch anti-collision device is used to trigger the limit switch by the collision and compression of the lifting rod with the obstacle. During use, the lifting rod is prone to breakage due to excessive impact. As the lifting rod breaks, the limit switch loses its trigger pressure, meaning that the aerial work platform may continue to move upward, leading to a safety accident. Based on this, an anti-collision device for aerial work platforms is provided. Utility Model Content
[0003] The purpose of this utility model is to provide an anti-collision device for aerial work platforms in order to solve the problems mentioned above.
[0004] To achieve the above objectives, this utility model provides the following technical solution: an anti-collision device for an aerial work platform, comprising a frame assembly consisting of a convex mounting frame, mounting holes, a lifting groove, and a top plate, as well as a limit switch and a triggering assembly. The convex mounting frame is symmetrically arranged on both sides of the horizontal portion of the convex mounting frame. The lifting groove is formed between the two horizontal portions of the convex mounting frame and the front end plate of the convex mounting frame. The top plate is welded and fixed to the top of the convex mounting frame to seal the top of the lifting groove. The limit switch is installed at the front end of the front end plate of the convex mounting frame. The triggering assembly is installed inside the lifting groove and protrudes from the upper and lower ends and the front end of the convex mounting frame. The triggering assembly moves downward to trigger the limit switch. A self-locking component is also installed on one side of the top plate. The self-locking component is used to lock the downward movement of the trigger component, thereby maintaining the trigger state of the limit switch.
[0005] As a further embodiment of this utility model: the triggering component includes a lifting cylinder, a limiting ring, a pressure plate, a screw sleeve, a fastening nut, a lifting rod, and a spring; The lifting cylinder passes through the top plate and the lifting groove sequentially from the top of the top plate to the bottom of the convex mounting frame. The limiting ring is distributed below the convex mounting frame and fixed to the outside of the lifting cylinder, and is used to limit the upward movement of the lifting cylinder. The pressure plate is fixed to the outside of the lifting cylinder and extends through the front end plate of the convex mounting bracket to the front of the convex mounting bracket. The pressure plate is located directly above the contact of the limit switch. A limit guide groove is provided at the contact position between the front end plate of the convex mounting bracket and the pressure plate. The pressure plate moves down along the limit guide groove to realize the squeezing trigger of the limit switch. The screw sleeves are distributed above the top plate and fixed to one side of the outer wall of the lifting cylinder. The lifting rod is installed inside the lifting cylinder and passes through the upper and lower ends of the lifting cylinder. The fastening nut is threaded to the screw sleeve and is tightly pressed against the outer wall of the lifting rod to fix the position of the lifting rod. The springs are distributed inside the lifting groove and sleeved on the outside of the lifting cylinder. The upper and lower ends of the springs are respectively attached to the bottom of the pressure plate and the bottom of the inner wall of the lifting groove, and are used to provide upward thrust for the lifting cylinder and the pressure plate.
[0006] As a further improvement of this utility model: the self-locking component includes an arc-shaped hook and a torsion spring; The top plate has two sets of connecting seats symmetrically fixed at the top with the threaded sleeve as the center. The arc-shaped hooks are symmetrically rotated and connected in the middle of the two sets of connecting seats. The tops of the two arc-shaped hooks are close to each other and distributed directly below the threaded sleeve. The torsion spring is sleeved on the outside of the rotating shaft of the arc-shaped hook, and the two ends of the torsion spring are respectively engaged with the upper surface of the arc-shaped hook and the top plate, so as to provide an upward torsional force for the arc-shaped hook. The downward movement of the screw sleeve compresses the two arc-shaped hooks, causing them to open up to each other. When the screw sleeve moves below the arc-shaped hooks, the arc-shaped hooks reset, thus locking the upward movement of the screw sleeve.
[0007] As a further improvement of this utility model: the top arc surfaces of the two arc hooks are in the shape of an inverted "V" and the lower top surface of the two arc hooks is formed with an arc groove that matches the outer wall of the threaded sleeve.
[0008] As a further embodiment of this utility model: the end faces of the two arc-shaped hooks are formed with handles, and the handles are distributed at an angle upwards.
[0009] Compared with the prior art, the beneficial effects of this utility model are: By incorporating a self-locking component, when the top of the lifting rod contacts and presses against an obstacle, causing the lifting rod, lifting cylinder, pressure plate, and screw sleeve to move downwards as a whole, the screw sleeve presses against two arc-shaped hooks, causing the two arc-shaped hooks to move away from each other and unfold. When the screw sleeve smoothly moves down below the two arc-shaped hooks, the two arc-shaped hooks reset and adhere to the top of the screw sleeve under the torque of the torsion spring, thus limiting the upward movement of the screw sleeve. At this time, the pressure plate keeps the contacts of the limit switch pressed. In this way, even if the lifting rod breaks due to excessive impact force, the limit switch is still in the triggered state, effectively preventing safety accidents caused by the aerial work platform continuing to move upwards, and further improving the operational safety of the aerial work platform. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the disassembled lifting rod of this utility model; Figure 3 This is a structural cross-sectional view of the convex mounting bracket of this utility model; Figure 4 This is a structural schematic diagram of the lifting cylinder in the downward moving state of this utility model.
[0011] In the diagram: 1. Frame assembly; 101. Convex mounting bracket; 102. Mounting hole; 103. Lifting groove; 104. Limiting guide groove; 105. Top plate; 106. Connecting seat; 2. Limit switch; 3. Trigger assembly; 301. Lifting cylinder; 302. Limiting ring; 303. Pressure plate; 304. Screw sleeve; 305. Fastening nut; 306. Lifting rod; 307. Spring; 4. Self-locking assembly; 401. Arc-shaped hook; 402. Handle; 403. Torsion spring. Detailed Implementation
[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0013] Please see Figures 1-4In this embodiment of the utility model, an anti-collision device for an aerial work platform includes a frame assembly 1 consisting of a convex mounting frame 101, mounting holes 102, a lifting groove 103, and a top plate 105, as well as a limit switch 2 and a trigger assembly 3. The convex mounting frame 101 is symmetrically opened on both sides of the horizontal part of the convex mounting frame 101. The lifting groove 103 is formed between the two horizontal parts of the convex mounting frame 101 and the front end plate of the convex mounting frame 101. The top plate 105 is welded and fixed to the top of the convex mounting frame 101 to seal the top of the lifting groove 103. The limit switch 2 is installed at the front end of the front end plate of the convex mounting frame 101. The trigger assembly 3 is installed inside the lifting groove 103 and protrudes from the upper and lower ends and the front end of the convex mounting frame 101. The trigger assembly 3 moves down to trigger the limit switch 2. A self-locking component 4 is also installed on one side of the top of the top plate 105. The self-locking component 4 is used to self-lock the downward movement state of the trigger component 3, and to maintain the trigger state of the limit switch 2. The triggering component 3 includes a lifting cylinder 301, a limiting ring 302, a pressure plate 303, a screw sleeve 304, a fastening nut 305, a lifting rod 306, and a spring 307; The lifting cylinder 301 extends from the top of the top plate 105 through the top plate 105 and the lifting groove 103 to the bottom of the convex mounting bracket 101. The limiting ring 302 is distributed below the convex mounting bracket 101 and fixed to the outside of the lifting cylinder 301, and is used to limit the upward movement of the lifting cylinder 301. The pressure plate 303 is fixed to the outside of the lifting cylinder 301 and passes through the front end plate of the convex mounting bracket 101 to the front of the convex mounting bracket 101. The pressure plate 303 is located directly above the contact of the limit switch 2. A limiting guide groove 104 is provided at the contact position between the front end plate of the convex mounting bracket 101 and the pressure plate 303. The pressure plate 303 moves down along the limiting guide groove 104 to realize the squeezing trigger of the limit switch 2. Screw sleeves 304 are distributed above the top plate 105 and fixed to one side of the outer wall of the lifting cylinder 301. The lifting rod 306 is installed inside the lifting cylinder 301 and passes through the upper and lower ends of the lifting cylinder 301. The fastening nut 305 is threaded to the screw sleeve 304 and is tightly pressed against the outer wall of the lifting rod 306 to fix the position of the lifting rod 306. Springs 307 are distributed inside the lifting groove 103 and sleeved on the outside of the lifting cylinder 301. The upper and lower ends of springs 307 are respectively attached to the bottom of pressure plate 303 and the bottom of the inner wall of lifting groove 103, and are used to provide upward thrust for lifting cylinder 301 and pressure plate 303.
[0014] In this embodiment, it should be noted that the limit switch 2 is a conventional wireless limit switch on the market. The power supply of the wireless limit switch and the linkage principle between the wireless limit switch and the control system of the aerial work platform are conventional technologies of existing aerial work platforms, and will not be elaborated on here. The method of using this anti-collision device is as follows: First, connect the two horizontal parts of the convex mounting bracket 101 to the guardrail vertical bar of the aerial work platform. Then, tighten the convex mounting bracket 101 by passing the bolts through the mounting holes 102 and tightening them with nuts. Next, insert the lifting rod 306 into the lifting cylinder 301, and adjust the height of the lifting rod 306 protruding from the top of the lifting cylinder 301 according to the operator's height (the top of the lifting rod 306 should be higher than the operator's head level). Then, tighten the fastening nut 305 and the threaded sleeve 304 to press and fix the lifting rod 306. (It should be noted that the wireless receiver of the limit switch 2 is electrically connected to the control system of the aerial work platform to realize signal transmission.) Subsequently, when the aerial work platform is in operation, when the top of the lifting boom 306 comes into contact with and squeezes against an obstacle, the lifting boom 306, the lifting cylinder 301, and the pressure plate 303 move downward as a whole. The pressure plate 303 squeezes and triggers the contacts of the limit switch 2. The limit switch 2 sends a signal to the control system of the aerial work platform, and the control system of the aerial work platform controls the aerial work platform to stop rising, thus achieving anti-collision protection.
[0015] Please refer to this carefully. Figures 1-4 The self-locking component 4 includes an arc-shaped hook 401 and a torsion spring 403; Two sets of connecting seats 106 are symmetrically fixed on the top of the top plate 105 with the threaded sleeve 304 as the center. The arc-shaped hooks 401 are symmetrically rotated and connected between the two sets of connecting seats 106. The tops of the two arc-shaped hooks 401 are close to each other and distributed directly below the threaded sleeve 304. The torsion spring 403 is sleeved on the outside of the rotating shaft of the arc-shaped hook 401, and the two ends of the torsion spring 403 are respectively engaged with the arc-shaped hook 401 and the upper surface of the top plate 105, so as to provide an upward torsional force for the arc-shaped hook 401. When the screw sleeve 304 moves downward, it presses the two arc-shaped hooks 401 to open up to each other. When the screw sleeve 304 moves below the arc-shaped hooks 401, the arc-shaped hooks 401 reset to lock the screw sleeve 304 from moving upward. The top arc surfaces of the two arc-shaped hooks 401 are in the shape of an inverted "V" and the lower top surface of the two arc-shaped hooks 401 is formed with an arc groove that matches the outer wall of the threaded sleeve 304. Two arc-shaped hooks 401 are connected by a handle 402 on their end faces, which are inclined upwards.
[0016] In this embodiment: when the top of the lifting rod 306 contacts and presses against the obstacle, causing the lifting rod 306, lifting cylinder 301, pressure plate 303, and screw sleeve 304 to move downward as a whole, the screw sleeve 304 presses against the two arc-shaped hooks 401, causing the two arc-shaped hooks 401 to move away from each other and spread out (the torsion spring 403 is further deformed under force). In this way, the screw sleeve 304 moves smoothly down to below the two arc-shaped hooks 401. At this time, the two arc-shaped hooks 401 are reset under the torsion of the torsion spring 403. Finally, the two arc-shaped hooks 401 are attached to the top of the screw sleeve 304, realizing the upward movement limit of the screw sleeve 304. At this time, the pressure plate 303 keeps the contacts of the limit switch 2 pressed. Thus, when the lifting rod 306 breaks due to excessive impact, the limit switch 2 remains in the triggered state, effectively preventing safety accidents caused by the aerial work platform continuing to move upward. Afterward, when the aerial work platform is controlled to move downward, personnel can manually apply a pushing force to the handle 402 to rotate and open the arc-shaped hook 401, thereby allowing the lifting rod 306, lifting cylinder 301, pressure plate 303, and screw sleeve 304 to be reset under the elastic force of the spring 307, facilitating subsequent reuse. It should be noted that before each operation, the operator must manually test the lifting rod 306 to determine whether the triggering component 3, limit switch 2, and self-locking component 4 are working properly.
[0017] 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 collision avoidance device for an aerial work platform, comprising a frame assembly (1) consisting of a convex mounting frame (101), mounting holes (102), a lifting groove (103), and a top plate (105), as well as a limit switch (2) and a trigger assembly (3), wherein the convex mounting frame (101) is symmetrically arranged on both sides of the transverse portion of the convex mounting frame (101), the lifting groove (103) is formed between the two transverse portions of the convex mounting frame (101) and the front end plate of the convex mounting frame (101), and the top plate (105) is welded and fixed to the top of the convex mounting frame (101) for sealing the top of the lifting groove (103), characterized in that, The limit switch (2) is installed at the front end of the front end plate of the convex mounting bracket (101), and the trigger component (3) is installed inside the lifting groove (103) and protrudes from the upper and lower ends and the front end of the convex mounting bracket (101). The trigger component (3) moves down to trigger the limit switch (2). A self-locking component (4) is also installed on one side of the top plate (105). The self-locking component (4) is used to self-lock the downward movement state of the trigger component (3) and to maintain the trigger state of the limit switch (2).
2. The anti-collision device for an aerial work platform according to claim 1, characterized in that, The triggering component (3) includes a lifting cylinder (301), a limiting ring (302), a pressure plate (303), a screw sleeve (304), a fastening nut (305), a lifting rod (306), and a spring (307). The lifting cylinder (301) passes through the top plate (105) and the lifting groove (103) sequentially from the top of the top plate (105) to the bottom of the convex mounting bracket (101). The limiting ring (302) is distributed below the convex mounting bracket (101) and fixed to the outside of the lifting cylinder (301) to limit the upward movement of the lifting cylinder (301). The pressure plate (303) is fixed to the outside of the lifting cylinder (301) and passes through the front end plate of the convex mounting bracket (101) to the front of the convex mounting bracket (101). The pressure plate (303) is located directly above the contact of the limit switch (2). A limit guide groove (104) is provided at the contact position between the front end plate of the convex mounting bracket (101) and the pressure plate (303). The pressure plate (303) moves down along the limit guide groove (104) to realize the squeezing trigger of the limit switch (2). The threaded sleeve (304) is distributed above the top plate (105) and fixed to one side of the outer wall of the lifting cylinder (301). The lifting rod (306) is installed inside the lifting cylinder (301) and passes through the upper and lower ends of the lifting cylinder (301). The fastening nut (305) is threaded to the threaded sleeve (304) and tightly pressed against the outer wall of the lifting rod (306) to fix the position of the lifting rod (306). The spring (307) is distributed inside the lifting groove (103) and sleeved on the outside of the lifting cylinder (301). The upper and lower ends of the spring (307) are respectively attached to the bottom of the pressure plate (303) and the bottom of the inner wall of the lifting groove (103) to provide upward thrust for the lifting cylinder (301) and the pressure plate (303).
3. The anti-collision device for an aerial work platform according to claim 2, characterized in that, The self-locking component (4) includes an arc-shaped hook (401) and a torsion spring (403). The top plate (105) has two sets of connecting seats (106) symmetrically fixed at the top with the threaded sleeve (304) as the center. The arc-shaped hooks (401) are symmetrically rotated and connected in the middle of the two sets of connecting seats (106). The tops of the two arc-shaped hooks (401) are close to each other and distributed directly below the threaded sleeve (304). The torsion spring (403) is sleeved on the outside of the rotating shaft of the arc hook (401), and the two ends of the torsion spring (403) are respectively engaged with the upper surface of the arc hook (401) and the top plate (105) to provide an upward torsional force for the arc hook (401); The threaded sleeve (304) moves down and presses the two arc-shaped hooks (401) open to each other. When the threaded sleeve (304) moves below the arc-shaped hooks (401), the arc-shaped hooks (401) reset to lock the threaded sleeve (304) from moving up.
4. The anti-collision device for an aerial work platform according to claim 3, characterized in that, The top arc surfaces of the two arc hooks (401) are in the shape of an inverted "V" and the lower top surface of the two arc hooks (401) is formed with an arc groove that matches the outer wall of the threaded sleeve (304).
5. The anti-collision device for an aerial work platform according to claim 3, characterized in that, The two arc-shaped hooks (401) are formed with handles (402) on their end faces, and the handles (402) are distributed at an angle upward.