Aerial work platform anti-crushing device

Abstract

The utility model relates to high altitude operation equipment technical field discloses a kind of high-altitude platform anti-extrusion devices, be set in the operating table front side of high-altitude platform, including the protective assembly of installation in operating table both ends, link set between protective assembly;The protective assembly includes mounting bracket, with the connecting seat of mounting bracket fixed, the side of connecting seat is equipped with driving arm, driving arm is rotatably connected with connecting seat, the lower end of driving arm is equipped with connecting arm, connecting arm is hinged with driving arm, the corresponding place of the lower end of mounting bracket and connecting arm is equipped with inductor, the upper end of driving arm in two protective assemblies is connected respectively with the both ends of link, and elastic reset piece is equipped between driving arm and mounting bracket.The utility model has the beneficial effect that can automatically forced stop high-altitude operation platform movement when being extruded, use more safe.

Description

Technical Field

[0001] This utility model relates to the field of aerial work equipment technology, and in particular to an anti-pinch device for aerial work platforms. Background Technology

[0002] During the operation of aerial work platforms, workers often need to perform lifting, rotating, and translating actions in complex or confined environments. Due to the limitations of the platform's structure, blind spots exist for operators, especially behind the platform, making it difficult to fully observe surrounding obstacles such as walls, pipes, or other equipment. When the platform moves, workers may not be able to detect obstacles behind them in time, leading to collisions and crushing accidents. Such crushing can not only cause injuries such as pinching and crushing to the operator, but in emergency situations, workers may also fail to immediately release the operating handles due to panic or inertia, causing the platform to continue moving and resulting in secondary injuries and exacerbating the severity of the accident.

[0003] In existing technologies, some aerial work platforms are equipped with collision avoidance sensors or alarm devices, but these devices often react slowly, lack sensitivity, or only provide warnings without forcibly stopping movement, failing to intervene in time when crushing occurs. Furthermore, traditional protective measures such as installing guardrails or using surveillance cameras rely on continuous human monitoring, which is prone to failure when fatigued or distracted. Statistics show that crush injuries account for a high proportion of accidents involving aerial work, especially in industries such as construction and maintenance, highlighting the inadequacy of existing safety measures. Utility Model Content

[0004] In order to solve at least some of the problems existing in the prior art, this utility model provides a safer anti-pinch device that can automatically and forcibly stop the movement of an aerial work platform when it is squeezed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An anti-pinch device for aerial work platforms is installed on the front side of the platform's control panel. It includes protective components installed at both ends of the control panel and a connecting rod between the protective components. Each protective component includes a mounting bracket and a connecting seat fixed to the mounting bracket. A drive arm is provided on the side of the connecting seat and is rotatably connected to the connecting seat. A connecting arm is provided at the lower end of the drive arm and is hinged to the drive arm. A sensor is provided at the lower end of the mounting bracket corresponding to the connecting arm. Both ends of the connecting rod are connected to the upper ends of the drive arms in the two protective components. An elastic reset member is provided between the drive arm and the mounting bracket. When the connecting rod is not compressed, under the action of the elastic reset member, the connecting rod is located inside the control panel and forms a preset space with the control panel. When the connecting rod is compressed and moves closer to the control panel, the sensor detects a signal change and controls the aerial work platform to stop moving.

[0006] By adopting the above technical solution: when the connecting rod is not compressed, it forms a preset space. When it is squeezed, it moves toward the operating table, triggering a change in the sensor signal, thereby forcibly controlling the platform to stop moving and realizing the automatic anti-squeeze function; at the same time, the elastic reset component ensures that the device automatically resets after the squeeze is released, improving operational safety and response efficiency.

[0007] Preferably, the upper end of the mounting bracket is fixedly provided with an upper fixed seat, and the lower end of the mounting bracket is fixedly provided with a lower fixed seat. The upper fixed seat is bolted to both sides of the operating platform. The lower fixed seat has two connecting through holes and a U-bolt pair. The U-bolt pair is inserted into the guardrail of the aerial work platform and then tightened to the lower fixed seat with nuts. The upper and lower fixed seats are fixedly installed by bolts and U-bolt pairs, ensuring that the protective components are securely installed on the operating platform and adapting to different specifications of platform guardrails. At the same time, the snap-fit ​​method of the U-bolt pairs simplifies the installation process and improves installation convenience.

[0008] Preferably, the lower end of the mounting bracket is fixed with an adjusting seat, the sensor is mounted on the adjusting seat, and the adjusting seat has several oblique slots. The side of the sensor is connected to the oblique slots by bolts. The adjusting seat and oblique slots allow for fine adjustment of the sensor's position and angle, ensuring accurate alignment between the sensor and the connecting arm.

[0009] Preferably, the sensor is configured as a limit switch, with a detection arm at its detection end. The lower end of the connecting arm is bent to form a contact portion, and the detection arm elastically abuts against the contact portion. When the state of the detection arm changes due to the connecting arm, the limit switch detects a signal. The limit switch reliably detects state changes as the connecting arm moves through the elastic contact between the detection arm and the contact portion; simultaneously, the elastic contact reduces false triggering, ensuring a timely stop signal is sent when compression occurs, thus improving response sensitivity and reliability.

[0010] Preferably, the connecting rod is configured as a rigid rod, and a connecting sleeve is fixedly provided on the inner side of the upper end of the drive arm. The end of the rigid rod is inserted into the connecting sleeve and limited by a cotter pin. The rigid rod and the connecting sleeve are connected simply and reliably by the cotter pin, ensuring that the connecting rod stably transmits force to the drive arm when under pressure.

[0011] Preferably, the connecting rod is configured as a flexible rod, with a sliding sleeve fixed to the inner side of the upper end of the drive arm. The sliding sleeve has a groove on its side, and connecting rings are provided at both ends of the flexible rod. A pin passing through the groove is provided inside the sliding sleeve, and the flexible rod is limited by the pin after extending into the sliding sleeve. A compression spring is provided inside the sliding sleeve and fitted onto the flexible rod. The flexible rod and the sliding sleeve are connected by the pin and the compression spring, allowing the connecting rod to elastically deform within a certain range to absorb impact force; simultaneously, the compression spring buffers and reduces false triggering, adapting to different compression forces and improving the adaptability and safety of the device.

[0012] Preferably, the protective assembly has a protective cover on its inner side. The protective cover isolates the various moving parts inside the protective assembly, preventing fingers from being pinched during movement; on the other hand, the protective cover reduces external interference, ensuring stable operation of the sensors and transmission components.

[0013] Preferably, the elastic reset component is configured with two tension springs. One tension spring is located between the upper end of the drive arm and the mounting bracket, and the other tension spring is located between the lower end of the drive arm and the mounting bracket. When the connecting rod is not compressed, the drive arm is in a vertical position under the action of the two tension springs. The two tension springs work together to ensure that the drive arm maintains a stable vertical position when not compressed, with consistent preset space. At the same time, the balanced design of the upper and lower tension springs ensures accurate reset after compression, improving the consistency and reliability of the system response.

[0014] Therefore, this utility model has the following beneficial effects: (1) Through the cooperation of the connecting rod and the sensor, the automatic detection of extrusion and forced stop of the platform movement can be realized, effectively preventing extrusion injury and secondary accidents; (2) The protective components and elastic reset components ensure that the device responds sensitively and can be automatically reset, improving safety and operating efficiency; (3) The protective cover and sensor fine-tuning design enhance environmental adaptability and durability, and extend the service life of the device; (4) Through the option of rigid or flexible connecting rods, different working conditions can be met, further improving practicality and reliability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the usage state of this utility model.

[0016] Figure 2 This is a schematic diagram of the state when the connecting rod is not under pressure.

[0017] Figure 3 This is a schematic diagram of the state of the connecting rod (rigid rod) after compression.

[0018] Figure 4 This is a schematic diagram of a protective component.

[0019] Figure 5 for Figure 4 Exploded view.

[0020] Figure 6 This is a schematic diagram of the flexible rod under compression.

[0021] Figure 7 This is an exploded view of the connection between the flexible rod and the drive arm.

[0022] In the diagram: Protective component 1, mounting bracket 11, upper fixed seat 111, lower fixed seat 112, U-bolt pair 113, adjusting seat 114, oblique slot hole 115, connecting seat 12, drive arm 13, connecting sleeve 131, cotter pin 132, sliding sleeve 133, pin 134, compression spring 135, sliding groove 136, connecting arm 14, abutment part 141, sensor 15, limit switch 151, detection arm 152, connecting rod 2, rigid rod 21, flexible rod 22, connecting ring 221, elastic reset component 16, tension spring 161, protective cover 3, aerial work platform 4, operating table 41. Detailed Implementation

[0023] To make the technical problem to be solved, the technical solution, and the beneficial technical effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and several exemplary embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the scope of protection of the present utility model.

[0024] It should be understood that the terms "first," "second," etc., used herein are for descriptive purposes only and should not be construed as indicating or implying relative importance, nor should they be construed as implicitly specifying the number of technical features indicated. Features specified as "first" or "second" may expressly or implicitly indicate that at least one of those features is included.

[0025] like Figures 1-5The aerial work platform anti-pinch device shown includes a protective component 1 and a connecting rod 2 installed on the front side of the operating platform 41 of the aerial work platform 4. The inner side of the protective component 1 is provided with a protective cover 3. The protective component 1 includes a mounting bracket 11 and a connecting seat 12 fixed to the mounting bracket 11. A drive arm 13 is provided on the side of the connecting seat 12 and is rotatably connected to the connecting seat 12. A connecting arm 14 is provided at the lower end of the drive arm 13 and is hinged to the drive arm 13. A sensor 15 is provided at the lower end of the mounting bracket 11 corresponding to the connecting arm 14. The two ends of the connecting rod 2 are respectively connected to the upper ends of the drive arms 13 in the two protective components 1. An elastic reset member 16 is provided between the drive arm 13 and the mounting bracket 11. When the connecting rod 2 is not compressed, under the action of the elastic reset member 16, the connecting rod 2 is located inside the operating platform 41 and forms a preset space with the operating platform 41. When the connecting rod 2 is compressed and moves closer to the operating platform 41, the sensor 15 detects the signal change and controls the aerial work platform 4 to stop moving. In this structure, the connecting rod forms a safe space when it is not compressed. When it is subjected to external pressure, the connecting rod moves toward the operating platform, triggering sensors through the drive arm and connecting arm, thereby immediately and forcibly stopping the platform movement to prevent crushing accidents. At the same time, through the elastic reset component, it automatically resets after the crushing is released, ensuring the continuous use of the device and improving operational safety and reliability.

[0026] In this embodiment, as Figure 4 and Figure 5 As shown, the elastic reset component 16 is configured with two tension springs 161. One tension spring 161 is located between the upper end of the drive arm 13 and the mounting bracket 11, and the other tension spring 161 is located between the lower end of the drive arm 13 and the mounting bracket 11. When the connecting rod 2 is not compressed, the drive arm 13 is in a vertical state under the action of the two tension springs 161. In this structure, the two tension springs work together to ensure that the drive arm maintains a stable vertical position when not compressed, with consistent preset space. At the same time, through the balanced design of the upper and lower tension springs, it can accurately reset after being compressed, improving the consistency and reliability of the system response.

[0027] like Figure 5 As shown, an upper fixed seat 111 is fixed to the upper end of the mounting bracket 11, and a lower fixed seat 112 is fixed to the lower end of the mounting bracket 11. The upper fixed seat 111 is bolted to both sides of the operating platform 41. The lower fixed seat 112 has a connecting hole and a U-bolt pair 113. The U-bolt pair 113 is inserted into the guardrail of the aerial work platform 4 and then passes through the connecting hole, and is then tightened with a nut. In this structure, the mounting bracket is fixed by bolts and U-bolt pairs 113, ensuring that the protective components are securely installed on the operating platform, making installation and disassembly more convenient.

[0028] In some embodiments, an adjusting seat 114 is fixedly provided at the lower end of the mounting bracket 11. The sensor is mounted on the adjusting seat 114, which has a plurality of oblique slots 115. The side of the sensor is connected to the oblique slots 115 by bolts. In this embodiment, the sensor is configured as a limit switch 151. The detection end of the limit switch 151 is provided with a detection arm 152. The lower end of the connecting arm 14 is bent to form an abutment portion 141. The detection arm 152 elastically abuts against the abutment portion 141. When the state of the detection arm 152 changes due to the connection arm 14, the limit switch 151 detects a signal. The limit switch reliably detects state changes when the connecting arm moves by elastically abutting the detection arm against the abutment portion. At the same time, the elastic contact reduces false triggering, ensuring that a stop signal is sent in time when compression occurs, thereby improving response sensitivity and reliability.

[0029] like Figure 3 and Figure 4 As shown, the connecting rod 2 is configured as a rigid rod 21, and a connecting sleeve 131 is fixedly provided on the inner side of the upper end of the drive arm 13. The end of the rigid rod 21 is inserted into the connecting sleeve 131 and then limited by a cotter pin 132. The rigid rod and the connecting sleeve are connected simply and reliably by the cotter pin, ensuring that the connecting rod stably transmits force to the drive arm when under pressure; at the same time, the rigid structure reduces deformation and improves transmission accuracy and durability.

[0030] In some embodiments, such as Figure 6 and Figure 7 As shown, the connecting rod 2 is configured as a flexible rod 22. A sliding sleeve 133 is fixedly installed on the inner side of the upper end of the drive arm 13. A sliding groove 136 is provided on the side of the sliding sleeve 133. Both ends of the flexible rod 22 are provided with connecting rings 221. A pin 134 is provided inside the sliding sleeve 133, penetrating the sliding groove. After the flexible rod 22 extends into the sliding sleeve 133, it is limited by the pin 134. A compression spring 135 is provided inside the sliding sleeve 133 and sleeved on the flexible rod 22. The flexible rod and the sliding sleeve are connected by the pin and the compression spring, allowing the connecting rod to elastically deform within a certain range to absorb impact force; at the same time, the compression spring buffers and reduces false triggering, adapts to different squeezing forces, and improves the adaptability and safety of the device.

[0031] The working principle of this utility model is as follows: When the aerial work platform 4 is moving, if the worker is squeezed by an obstacle, their body will lean forward, which will drive the squeezing linkage 2 to move towards the operating platform. The movement of the linkage 2 will cause the drive arm 13 to rotate around the connecting seat 12, and the connecting arm 14 at the lower end of the drive arm 13 will move accordingly. The contact part of the connecting arm 14 will cause the detection arm state of the limit switch to change. The limit switch will trigger a signal and send a signal to the control system of the aerial work platform. After receiving the signal, the control system will immediately force the platform to stop lifting, rotating or translating, thereby preventing further squeezing, and the worker will wait for rescue. When the squeezing is relieved and the worker is safe, the drive arm and linkage will automatically return to their original positions under the action of the elastic reset component, the sensor will return to its initial state, and the platform can continue to operate.

[0032] In the description of this utility model, it should be understood that the directions or positional relationships indicated by up, down, left, right, inner end, outer end, one end, and the other end are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the purpose of more clearly describing the technical solution of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as a limitation of this utility model.

[0033] Although specific embodiments of the present invention are described in detail herein, they are given for illustrative purposes only and should not be construed as limiting the scope of the present invention. Various substitutions, alterations, and modifications may be conceived without departing from the spirit and scope of the present invention.

Claims

1. A device for preventing crushing of aerial work platforms, installed on the front side of the operating platform (41) of the aerial work platform (4), characterized in that, The system includes protective components (1) installed at both ends of the operating table (41) and connecting rods (2) between the protective components (1); the protective components (1) include a mounting bracket (11) and a connecting seat (12) fixed to the mounting bracket (11). The side of the connecting seat (12) is provided with a drive arm (13), which is rotatably connected to the connecting seat (12). The lower end of the drive arm (13) is provided with a connecting arm (14), which is connected to the drive arm (13). The lower end of the mounting bracket (11) is provided with a sensor (15) corresponding to the connecting arm (14). The two ends of the connecting rod (2) are respectively connected to the upper ends of the drive arms (13) in the two protective components (1). An elastic reset member (16) is provided between the drive arm (13) and the mounting bracket (11). When the connecting rod (2) is not compressed, under the action of the elastic reset member (16), the connecting rod (2) is located inside the operating table (41) and forms a preset space with the operating table (41); When the connecting rod (2) is compressed and moves closer to the control panel (41), the sensor (15) detects the signal change and controls the aerial work platform (4) to stop moving.

2. The anti-pinch device for aerial work platforms according to claim 1, characterized in that, The upper end of the mounting bracket (11) is fixed with an upper fixing seat (111), and the lower end of the mounting bracket (11) is fixed with a lower fixing seat (112). The upper fixing seat (111) is bolted to both sides of the operating table (41). The lower fixing seat (112) is provided with a U-shaped bolt pair (113). After the U-shaped bolt pair (113) is inserted into the guardrail of the aerial work platform (4), it is fastened to the lower fixing seat (112) with a nut.

3. The anti-pinch device for aerial work platforms according to claim 1, characterized in that, An adjustment seat (114) is fixedly provided at the lower end of the mounting bracket (11). The sensor is mounted on the adjustment seat (114). The adjustment seat (114) is provided with several oblique slots (115). The side of the sensor is connected to the oblique slots (115) by bolts.

4. A device for preventing crushing of aerial work platforms according to claim 1 or 3, characterized in that, The sensor is configured as a limit switch (151). The detection end of the limit switch (151) is provided with a detection arm (152). The lower end of the connecting arm (14) is bent to form an abutment part (141). The detection arm (152) and the abutment part (141) are elastically abutted. When the state of the connecting arm (14) drives the detection arm (152) to change, the limit switch (151) detects a signal.

5. The anti-pinch device for aerial work platforms according to claim 1, characterized in that, The connecting rod (2) is configured as a rigid rod (21), and a connecting sleeve (131) is fixed on the inner side of the upper end of the drive arm (13). The end of the rigid rod (21) is inserted into the connecting sleeve (131) and then limited by a cotter pin (132).

6. The anti-pinch device for aerial work platforms according to claim 1, characterized in that, The connecting rod (2) is configured as a flexible rod (22). A sliding sleeve (133) is fixedly provided on the inner side of the upper end of the drive arm (13). A sliding groove (136) is provided on the side of the sliding sleeve (133). A connecting ring (221) is provided at both ends of the flexible rod (22). A pin (134) is provided inside the sliding sleeve (133) that passes through the sliding groove. The flexible rod (22) is limited by the pin (134) after it extends into the sliding sleeve (133). A compression spring (135) is provided inside the sliding sleeve (133) and sleeved on the flexible rod (22).

7. The anti-pinch device for aerial work platforms according to claim 1, characterized in that, The inner side of the protective component (1) is provided with a protective cover (3).

8. The anti-pinch device for aerial work platforms according to claim 1, characterized in that, The elastic reset member (16) is configured as two tension springs (161), one of which is located between the upper end of the drive arm (13) and the mounting bracket (11), and the other is located between the lower end of the drive arm (13) and the mounting bracket (11). When the connecting rod (2) is not compressed, the drive arm (13) is in a vertical state under the action of the two tension springs (161).

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