A vehicle-mounted liftable work platform passenger protection device

Abstract

This invention discloses a personnel protection device for a vehicle-mounted liftable work platform, belonging to the technical field of engineering machinery and equipment. The device includes a work platform and a hydraulic system for controlling the platform. The work platform includes a platform body, a barrier, a self-locking door, and a detection device. The detection device detects whether there are operators inside the work platform. The self-locking door is connected to the barrier at both ends via hinges and locking devices. The hydraulic system controls the movement of the work platform based on the detection information from the detection device. In this invention, the self-locking door and the work platform barrier together provide mechanical protection for the operator. The self-locking door is designed to automatically lock, making it convenient and reliable to use. The hydraulic system is equipped with a manual shut-off valve and a solenoid valve to ensure that when someone is inside the work platform, ground personnel cannot control the platform's movement, preventing falls and injuries to workers at height due to work errors or misoperation.

Description

Technical Field

[0001] This invention belongs to the field of engineering machinery and equipment technology, and more specifically, relates to a personnel protection device for a vehicle-mounted liftable work platform. Background Technology

[0002] A vehicle-mounted lift platform is a personnel-carrying platform installed on a mobile device, used to transport workers and tools to high-altitude work positions. It is used in many engineering vehicles, such as aerial work platforms for the maintenance and repair of aerial equipment, and lifting platforms for high-altitude construction and surveying using rock drilling rigs and anchor bolt rigs.

[0003] Because working at heights is inherently dangerous, the standards for liftable work platforms are quite stringent, including structural strength, fall protection, and vehicle stability (to prevent rollover). For specific details, please refer to the EN280 standard.

[0004] Although the standards for designing and manufacturing lifting work platforms are quite stringent, equipment that meets the standards can still pose dangers in actual use, especially non-dedicated aerial work platforms. For example, tunnel and mining construction equipment such as rock drilling rigs and anchor bolt rigs equipped with lifting work platforms typically have two operating systems—one inside the platform and one on the frame—to control its lifting and movement. When the work platform is carrying personnel, if the ground operator accidentally operates the control system located on the ground, the workers on the aerial work platform will be in grave danger. Some equipment is designed with a control system cut-off function, which disables the work platform and prevents dangers caused by misoperation. However, the cut-off control is manually operated, which is inconvenient for frequent use and easily forgotten, still posing a safety hazard.

[0005] In summary, overcoming the inadequacies of existing vehicle-mounted liftable work platform protection systems is a pressing technical challenge that needs to be addressed. Summary of the Invention

[0006] 1. The technical problem that the invention aims to solve

[0007] This invention overcomes the shortcomings of existing vehicle-mounted liftable work platform protection systems, providing a personnel protection device for vehicle-mounted liftable work platforms. The self-locking door and the work platform enclosure together provide mechanical protection for operators. The self-locking door design enables automatic locking, making it convenient and reliable to use. The hydraulic system is equipped with a manual shut-off valve and a solenoid valve to ensure that when there are people inside the work platform, ground personnel cannot control the platform's movement, thus avoiding falls and injuries to workers at heights due to work errors or misoperations.

[0008] 2. Technical Solution

[0009] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0010] The present invention provides a vehicle-mounted liftable work platform personnel protection device, comprising a work platform and a hydraulic system for controlling the work platform. The work platform includes a platform body, on which a barrier, a self-locking door and a detection device are installed. The detection device is used to detect whether there are operators inside the work platform. The two ends of the self-locking door are connected to the barrier through hinges and locking devices, respectively. The hydraulic system controls the movement of the work platform according to the detection information of the detection device.

[0011] As a further improvement of the present invention, the locking device includes a lock body and a locking plate and a locking buckle that are configured to cooperate, wherein the locking plate rotates around the locking buckle to open or close the self-locking door.

[0012] As a further improvement of the present invention, the hinge includes a door hinge, a spring fitted on the door hinge, and an upper mounting bracket and a lower mounting bracket arranged opposite each other and cooperating with each other through inclined surfaces. When the self-locking door is opened, the upper mounting bracket and the lower mounting bracket gradually separate and compress the spring. When the self-locking door is closed, the spring pops out and causes the upper mounting bracket and the lower mounting bracket to gradually contact each other.

[0013] As a further improvement of the present invention, the locking device also includes an adjusting screw for adjusting the position of the locking piece.

[0014] As a further improvement of the present invention, the hydraulic system includes a chassis operating system and a working platform operating system. The chassis operating system and the working platform operating system are respectively connected to the actuator used to control the working platform. The hydraulic circuit of the chassis operating system is equipped with a solenoid valve, and the hydraulic circuit of the working platform operating system is equipped with a manual shut-off valve.

[0015] As a further improvement of the present invention, the hydraulic system also includes an electronic control unit, which includes a control module, a power supply module, an execution module, and a detection module. The control module is connected to the power supply module, the execution module, and the detection module respectively. The detection module uses a detection device to detect information and transmits it to the control module. The control module receives and processes the signals from the detection module and transmits them to the execution module. The execution module is used to control the opening and closing of the solenoid valve.

[0016] As a further improvement of the present invention, the detection device is a laser scanner.

[0017] As a further improvement of the present invention, there are at least two laser scanners, which are mounted on the platform body in a detachable connection manner.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the technical solution provided by this invention has the following significant advantages:

[0020] This invention discloses a personnel protection device for a vehicle-mounted liftable work platform. A self-locking door and a work platform enclosure together provide mechanical protection for operators. The self-locking door design enables automatic locking, making it convenient and reliable to use. The hydraulic system is equipped with a manual shut-off valve and a solenoid valve to ensure that when someone is inside the work platform, ground personnel cannot control the platform's movement, preventing falls due to work errors or misoperation. Furthermore, if operators inside the platform need to frequently control its movement, the device reduces the need for manual system shutdown, improving ease of use. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of a vehicle-mounted liftable work platform passenger protection device according to the present invention;

[0022] Figure 2 This is a schematic diagram of the electronic control unit in this invention;

[0023] Figure 3 This is a schematic diagram of the oil circuit of the hydraulic system in this invention.

[0024] Figure label:

[0025] 1. Self-locking door; 2. Upper mounting bracket; 3. Spring; 4. Lower mounting bracket; 5. Lock plate; 6. Locking buckle; 7. Adjusting screw; 8. Detection device. Detailed Implementation

[0026] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments.

[0027] Combination Figure 1 The present invention discloses a vehicle-mounted liftable work platform personnel protection device, including a work platform and a hydraulic system for controlling the work platform. The work platform includes a platform body, a fence, a self-locking door 1 and a detection device 8 are installed on the platform body. The detection device 8 is used to detect whether there are operators on the work platform. The two ends of the self-locking door 1 are connected to the fence through hinges and locking devices, respectively. The hydraulic system controls the movement of the work platform according to the detection information of the detection device 8, that is, the chassis operator can control the movement of the work platform through the hydraulic system.

[0028] Specifically, in this embodiment, the locking device includes a lock body and a locking plate 5 and a locking buckle 6 that are configured to cooperate. The locking plate 5 rotates around the locking buckle 6 to open or close the self-locking door 1. The hinge includes a door hinge, a spring 3 fitted on the door hinge, and an upper mounting bracket 2 and a lower mounting bracket 4 that are arranged opposite each other and cooperate with each other through inclined surfaces. When the self-locking door 1 is opened, the upper mounting bracket 2 and the lower mounting bracket 4 gradually separate and compress the spring 3. When the self-locking door 1 is closed, the spring 3 pops out and causes the upper mounting bracket 2 and the lower mounting bracket 4 to gradually contact each other. In addition, in this embodiment, the locking device also includes an adjusting screw 7, which is used to adjust the position of the locking plate 5.

[0029] This embodiment provides a personnel protection device for a vehicle-mounted liftable work platform, taking a cantilever work platform as an example; the structure is described below. Figure 1 Among them, the self-locking door 1 is an inward-opening design. The upper and lower mounting brackets of the door hinge are in a beveled contact fit. When the worker needs to enter the work platform, he pushes the door inward into the platform. The self-locking door 1 rotates inward into the work platform and opens. The beveled contact fit of the upper and lower mounting brackets will become a point contact, and the door will be raised in the height direction. At the same time, the spring 3 is compressed. When the door is fully open, it will be raised by about 40mm.

[0030] Once the staff enters the work platform, they no longer apply pushing or pulling force to the self-locking door 1. The previously compressed spring 3 releases its elastic potential energy, and the gravitational potential energy of the lifted self-locking door 1 is also released at the same time, causing the self-locking door 1 to rotate and close. When closing the door, the door lock located on the other side of the door hinge will lock the self-locking door 1, preventing it from opening on its own.

[0031] When the self-locking door 1 is locked, the lock body and lock plate 5 located on the self-locking door 1 rotate around the door hinge. Due to the release of the elastic potential energy of the spring 3 and the gravitational potential energy of the self-locking door 1, it has a certain initial velocity. The lock plate 5, which has been adjusted by the adjusting screw 7, strikes the latch 6. Since the lock plate 5 can rotate around the lock body pin, the lock plate 5 will bounce upward and then fall due to gravity. The locking groove on the lock plate 5 will engage the latch 6, thereby realizing the automatic locking of the self-locking door 1.

[0032] In summary, the vehicle-mounted liftable work platform personnel protection device of this embodiment provides mechanical protection for operators through the self-locking door 1 and the work platform enclosure, avoiding the risk of falling from height. Of course, the work platform can also provide a protective canopy for operators to prevent injury from falling objects.

[0033] Combination Figure 3In one embodiment, the hydraulic system includes a chassis operating system 100 and a working platform operating system 200. The chassis operating system 100 and the working platform operating system 200 are respectively connected to the actuator 300 used to control the working platform. The chassis operating system 100 is equipped with a solenoid valve 110 on its oil circuit, and the working platform operating system 200 is equipped with a manual shut-off valve 210 on its oil circuit.

[0034] In this embodiment, the chassis operating system 100 and the work platform operating system 200 are two identical hydraulic pilot-operated systems for controlling the movement of the work platform. The operator can control the hydraulic cylinder in the actuator 300 through the pilot-operated handle control valve to realize the lifting, lowering and translating of the work platform.

[0035] Furthermore, in combination Figure 2 In this embodiment, the hydraulic system also includes an electronic control unit, which includes a control module, a power supply module, an execution module, and a detection module. The control module is connected to the power supply module, the execution module, and the detection module respectively. The detection module uses the detection device 8 to detect information and transmits it to the control module. The control module receives and processes the signal from the detection module and transmits it to the execution module. The execution module is used to control the opening and closing of the solenoid valve 110.

[0036] It is worth noting that in this embodiment, a solenoid valve 110 is installed on the oil circuit of the chassis operating system 100. When the electronic control unit detects that someone is on the work platform, the control module outputs an energizing signal to the solenoid valve, energizing the coil of the solenoid valve 110 and cutting off the pilot oil circuit of the chassis operating system 100, so that the chassis operating system 100 cannot control the movement of the work platform, and only the work platform operating system 200 can control the movement of the platform; when the detection module has no input signal or inputs a no-person signal, the control module outputs an de-energizing signal, the coil of the solenoid valve 110 is de-energized, the pilot oil circuit is always open, and both the chassis operating system 100 and the work platform operating system 200 can control the movement of the work platform.

[0037] The hydraulic system in this embodiment eliminates the need for repeated manual switching on / off of the dual operating systems when operators inside the work platform frequently control the platform's movement. This makes it convenient to use and also eliminates potential safety hazards caused by misoperation by ground personnel.

[0038] In this embodiment, the working platform operating system 200 retains the manual shut-off valve 210. When the manual shut-off valve 210 is opened, the high-pressure oil circuit of the hydraulic system is directly connected to the return oil, the system pressure is zero, and neither the chassis operating system 100 nor the working platform operating system 200 can control the movement of the working platform.

[0039] When the work platform needs to be operated at a fixed position at a high altitude for a long time, the manual shut-off valve 210 can be opened. At this time, both systems are cut off at the same time, and any misoperation will not cause the work platform to move, which is highly safe. When the platform needs to be moved again, the manual shut-off valve 210 can be closed again.

[0040] Furthermore, in this embodiment, the power supply module is generally a 24V power supply, mainly powering the control module, detection module, and execution module; the control module is generally a programmable controller such as a PLC, which receives and processes signals from the detection module and determines whether to output signals to the execution module based on the signals; the execution module is generally a solenoid valve of a hydraulic system, which controls the position of the solenoid valve core according to the control module signals, and determines the corresponding function based on the position of the valve core; the detection module is generally a photoelectric sensor, which senses and detects whether there are people or objects within the working range, and provides input signals to the control module.

[0041] In addition, in this embodiment, the detection device 8 is a laser scanner. In order to further detect the situation inside the work platform, there are at least two laser scanners in this embodiment, which are installed on the platform body in a detachable connection manner so as to facilitate the installation and replacement of the detection device.

[0042] In this embodiment, the detection module uses a laser scanner installed inside the work platform. If there is someone in the work platform, the laser emitted by the laser scanner will detect them and transmit the signal to the control module in the form of a person signal. After receiving the person signal, the control module will output an energized signal for the solenoid valve. If there is no one in the platform, the scanner will give an unoccupied signal, and the control module will output an unoccupied signal for the solenoid valve based on the unoccupied signal. Alternatively, the scanner may not generate an input signal, and in this case, the control module will not output an energized signal for the solenoid valve.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vehicle-mounted liftable work platform passenger protection device, characterized in that: The system includes a work platform and a hydraulic system for controlling the work platform. The work platform includes a platform body, on which a fence, a self-locking door (1), and a detection device (8) are installed. The detection device (8) is used to detect whether there are operators inside the work platform. The self-locking door (1) is connected to the enclosure at both ends by hinges and latches respectively. The hinges include a door hinge, a spring (3) fitted on the door hinge, and an upper mounting bracket (2) and a lower mounting bracket (4) that are arranged opposite each other and cooperate with each other by inclined surfaces. The latches include a lock body, a lock plate (5), a latch (6) and an adjusting screw (7). The lock plate (5) rotates around the latch (6) to open or close the self-locking door (1). The adjusting screw (7) is used to adjust the position of the lock plate (5). When the self-locking door (1) is opened, the upper mounting bracket (2) and the lower mounting bracket (4) gradually separate and compress the spring (3). When the self-locking door (1) is closed, the spring (3) pops out and makes the upper mounting bracket (2) and the lower mounting bracket (4) gradually contact each other. The hydraulic system includes a chassis operating system (100) and a working platform operating system (200). The chassis operating system (100) is equipped with a solenoid valve (110) on its oil circuit, and the working platform operating system (200) is equipped with a manual shut-off valve (210) on its oil circuit. When the detection device (8) detects an operator, the solenoid valve (110) cuts off the oil circuit of the chassis operating system (100), and switching the state of the manual shut-off valve (210) can keep the oil circuit of the working platform operating system (200) connected or disconnected. The hydraulic system also includes an electronic control unit, which includes a control module, a power supply module, an execution module, and a detection module. The control module is connected to the power supply module, the execution module, and the detection module respectively. The detection module uses the detection device (8) to detect information and transmits it to the control module. The control module receives and processes the signal from the detection module and transmits it to the execution module. The execution module is used to control the opening and closing of the solenoid valve (110). When the detection device (8) detects that there is no operator, the solenoid valve (110) connects the oil circuit of the chassis operating system (100).

2. The vehicle-mounted liftable work platform personnel protection device according to claim 1, characterized in that: The detection device (8) is a laser scanner.

3. The vehicle-mounted liftable work platform personnel protection device according to claim 2, characterized in that: The laser scanner is at least two in number and is mounted on the platform body in a detachable manner.

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