A scissor-type aerial work platform anti-crushing system and a control method thereof

Abstract

The application discloses a scissor-type aerial work platform anti-crushing system and a control method. The scissor-type aerial work platform anti-crushing system comprises a chassis, a traveling device arranged at the bottom of the chassis and used for driving the aerial work platform to move, a distance detection device arranged at the traveling side of the chassis and used for detecting the distance of an obstacle in front and sending a parking signal, an operating handle arranged on the aerial work platform and used for sending control information to a controller, and the controller arranged on the chassis and used for receiving the control information of the distance detection device and the operating handle and controlling the traveling device to move. The system monitors the distance of the obstacle in the traveling direction of the vehicle, limits the traveling speed of the vehicle in the deceleration interval, stops the vehicle in the parking interval, and continues the traveling of the vehicle in the parking interval through a forced traveling unlocking button, so that the crushing of the obstacle in the traveling direction of the vehicle is effectively avoided, and the safety is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of aerial work platforms, and particularly relates to an anti-pinch system and control method for scissor lift aerial work platforms. Background Technology

[0002] Aerial work platforms are high-altitude work equipment that can lift workers and equipment to a designated height. They are widely used in docks, bridge construction, stadium setup, and the construction and maintenance of urban infrastructure. Self-propelled scissor lifts are a type of versatile aerial work equipment. Operators can use the control handles on the top to perform walking, lifting, and turning actions.

[0003] Existing self-propelled aerial work platforms, due to their extended working platform, typically have spring cables on the control handles for ease of operation, allowing operators to maneuver the vehicle from the extended platform. Because of the retractable nature of these spring cables, operators operating the vehicle from the ground may, due to negligence, be trapped or crushed by the vehicle. In particular, once trapped, the operator's instinctive reaction may prevent them from releasing the control handle to stop the vehicle, leading to serious consequences. Summary of the Invention

[0004] To at least partially solve the technical problems existing in the prior art, the present invention provides a scissor lift anti-pinch system and its control method, which avoids collisions with obstacles during startup or movement and improves driving safety.

[0005] Therefore, in one aspect of the present invention, a scissor lift anti-pinch system is provided, comprising:

[0006] Base frame;

[0007] A traveling device is installed at the bottom of the base frame and is used to drive the work platform to move.

[0008] A distance detection device is installed on the traveling side of the underframe and is used to detect the distance to obstacles in front and send control signals.

[0009] An operating handle, which is mounted on the work platform, is used to send control information to the controller;

[0010] A controller, mounted on the base frame, is used to receive control information from the distance detection device and the operating handle and to control the movement of the walking device.

[0011] Furthermore, in the aforementioned anti-pinch system for scissor lift aerial work platforms, the distance detection device and the output end of the operating handle are connected to the input end of the controller, and the output end of the controller is connected to the walking device.

[0012] Furthermore, in the aforementioned anti-pinch system for scissor lift aerial work platforms, the distance detection devices are arranged in pairs, with at least one pair on the traveling side of the underframe. Each pair of distance detection devices is arranged in a V-shape with the tilt angle adjusted according to the width of the underframe, and the effective detection area of ​​the distance detection device is smaller than the width of the underframe.

[0013] Furthermore, in the aforementioned anti-pinch system for scissor lift aerial work platforms, the operating handle includes:

[0014] A joystick, used to control the walking device's movement and steering;

[0015] An enable button is provided to prevent accidental operation during walking and turning.

[0016] A forced walking unlock button is used to deactivate the stop signal emitted by the distance detection device.

[0017] In another aspect of the present invention, a control method for an anti-pinch system of a scissor lift aerial work platform is provided, the control method comprising:

[0018] The distance detection device sets deceleration and stopping intervals according to the walking speed of the walking device. The distance detection device detects obstacles in front. When the distance detection device does not detect any obstacles in the set deceleration interval, the distance detection device controls the controller to switch to normal walking mode. The controller sends operation commands to the controller through the enable button and the joystick, and the controller controls the walking device to move at normal speed.

[0019] When the distance detection device detects an obstacle within the set deceleration range, the distance detection device controls the controller to switch to deceleration walking mode. The device sends operation commands to the controller via the enable button and joystick, and the controller controls the walking device to walk at a snail speed.

[0020] When the distance detection device detects an obstacle within the set deceleration range and slowly moves to the parking range, the distance detection device controls the controller to switch to anti-pinch parking mode. When the enable button and the joystick send an operation command to the controller, the controller controls the walking device to forcibly stop walking.

[0021] When the vehicle needs to be moved after entering the anti-pinch parking mode, press the forced walking unlock button continuously while simultaneously pressing the enable button and the joystick to send an operation command to the controller. At this time, the controller will control the walking device to move at a snail speed.

[0022] The anti-pinch system and control method for scissor lift aerial work platforms of the present invention have the following advantages and beneficial effects:

[0023] This invention uses a distance detection device to detect an obstacle in the deceleration zone, and a controller to control the walking device to decelerate. When an obstacle is detected in the parking zone, the controller controls the walking device to stop in time, effectively avoiding collisions with obstacles during vehicle startup or movement, and improving driving safety. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0025] Figure 1 This is a schematic diagram of the overall structure of the anti-pinch system for scissor lift aerial work platforms of the present invention;

[0026] Figure 2 This is a schematic diagram of the operating handle of the anti-pinch system for the scissor lift aerial work platform of the present invention;

[0027] Figure 3 This is a schematic diagram showing the distribution of the distance detection device in the anti-pinch system of the scissor lift aerial work platform of the present invention;

[0028] Figure 4 This is a flowchart of the anti-pinch system control method for the scissor lift aerial work platform of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1: Base frame; 2: Walking mechanism; 3: Distance detection device;

[0031] 4: Control handle; 41: Enable button; 42: Joystick; 43: Forced movement unlock button;

[0032] 5: Controller. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0034] like Figures 1-2 As shown, the anti-pinch system for scissor lift aerial work platforms of the present invention includes:

[0035] Base frame 1;

[0036] The traveling device 2 is located at the bottom of the base frame 1 and is used to drive the work platform to move.

[0037] Distance detection device 3 is installed on the traveling side of the base frame 1 and is used to detect the distance to obstacles in front and send control signals.

[0038] Operating handle 4 is set on the work platform and is used to send control information to controller 5;

[0039] The controller 5 is mounted on the base frame 1 and is used to receive control information from the distance detection device 3 and the operating handle 4 and to control the movement of the walking device 2.

[0040] Furthermore, in the aforementioned anti-pinch system for scissor lift aerial work platforms, the output ends of the distance detection device 3 and the operating handle 4 are connected to the input end of the controller 5, and the output end of the controller 5 is connected to the traveling device 2. This effectively ensures that control signals can be input to the controller 5 through the distance detection device 3 and the operating handle 4, and the controller 5 converts and controls the traveling device 2 to perform actions according to the control information.

[0041] Furthermore, in the aforementioned anti-pinch system for scissor lift aerial work platforms, the distance detection devices 3 are arranged in pairs, with at least one pair on the traveling side of the base frame 1. Each pair of distance detection devices 3 is tilted in a V-shape, with the tilt angle adjusted according to the width of the base frame 1. The effective detection area of ​​the distance detection device 3 is smaller than the width of the base frame 1, thereby allowing adjustment of the effective detection area by adjusting the tilt angle of the distance detection device 3.

[0042] Furthermore, in the aforementioned anti-pinch system for scissor lift aerial work platforms, the operating handle 4 includes:

[0043] The joystick 42 is used to control the walking device 2 to walk and turn, such as forward, backward, left turn and right turn.

[0044] Enable button 41 is used to prevent accidental operation during walking and turning operations. Therefore, the enable button 41 must be pressed simultaneously during walking and turning operations to perform the operation.

[0045] Forced walking unlock button 43 is used to deactivate the stop signal emitted by distance detection device 3.

[0046] In another aspect of the present invention, a control method for an anti-pinch system of a scissor lift aerial work platform is provided, the control method comprising:

[0047] like Figures 3-4 As shown, the distance detection device 3 sets a deceleration zone L2 and a stopping zone L3 according to the walking speed of the walking device 2. The distance detection device 3 detects obstacles in front. When the distance detection device 3 does not detect any obstacles in the set deceleration zone L2, the distance detection device 3 controls the controller 5 to switch to normal walking mode. The controller 5 sends operation commands to the controller 5 through the enable button 41 and the joystick 42. The controller 5 controls the walking device 2 to move at normal speed.

[0048] When the distance detection device 3 detects an obstacle within the set deceleration zone L2, the distance detection device 3 controls the controller 5 to switch to deceleration walking mode. The controller 3 sends an operation command to the controller 5 through the enable button 41 and the joystick 42. The controller 5 controls the walking device 2 to walk at a snail speed. During this process, a warning sound is accompanied to remind the operator to pay attention.

[0049] When the distance detection device 3 detects an obstacle within the set deceleration zone and slowly moves to the parking zone L3, the distance detection device 3 controls the controller 5 to switch to the anti-pinch parking mode. When the enable button 41 and the joystick 42 send an operation command to the controller 5, the controller 5 controls the walking device 2 to forcibly stop walking. During this process, a warning sound different from that in the deceleration walking mode is heard to alert the operator.

[0050] When the vehicle needs to be moved after entering the anti-pinch parking mode, the driver continuously presses the forced walking unlock button 43, and simultaneously sends an operation command to the controller 5 in conjunction with the enable button 41 and the joystick 42. At this time, the controller 5 controls the walking device 2 to walk at a slow speed.

[0051] In summary, compared with the prior art, the anti-pinch system and control method for the scissor lift aerial work platform of the present invention have the following advantages and beneficial effects:

[0052] This invention uses a distance detection device to detect an obstacle in the deceleration zone, and a controller to control the walking device to decelerate. When an obstacle is detected in the parking zone, the controller controls the walking device to stop in time, effectively avoiding collisions with obstacles during vehicle startup or movement, and improving driving safety.

[0053] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Meanwhile, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, the terms "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement states shown in the accompanying drawings.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; 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; and these 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 scissor lift aerial work platform anti-pinch system, characterized in that, The anti-pinch system of the scissor lift aerial work platform includes: Base frame; A traveling device is installed at the bottom of the base frame and is used to drive the work platform to move. A distance detection device is installed on the traveling side of the underframe to detect the distance to obstacles ahead and send a stop signal. An operating handle, which is mounted on the work platform, is used to send control information to the controller; A controller, mounted on the base frame, is used to receive control information from the distance detection device and the operating handle, and to control the movement of the walking device. The distance detection device and the operating handle output are connected to the controller input, and the controller output is connected to the walking device. Control signals can be input to the controller through the distance detection device and the operating handle, and the controller converts and controls the walking device to perform actions according to the control information. The distance detection devices are arranged in pairs, with at least one pair on the traveling side of the chassis. Each pair of distance detection devices is tilted in a V-shape, and the tilt angle is adjusted according to the width of the chassis. The effective detection area of ​​the distance detection device is smaller than the width of the chassis, and the effective detection area can be adjusted by adjusting the tilt angle of the distance detection device. The operating handle includes: A joystick, used to control the walking device's movement and steering; An enable button is used to prevent accidental operation during walking and turning. The enable button must be pressed and held simultaneously to perform the walking and turning actions. A forced walking unlock button is used to deactivate the stop signal emitted by the distance detection device.

2. A control method using the anti-pinch system of the scissor lift aerial work platform according to claim 1, characterized in that, The control method for the anti-pinch system of the scissor lift aerial work platform includes: The distance detection device sets deceleration and stopping intervals according to the walking speed of the walking device. The distance detection device detects obstacles in front. When the distance detection device does not detect any obstacles in the set deceleration interval, the distance detection device controls the controller to switch to normal walking mode. The controller sends operation commands to the controller through the enable button and the joystick, and the controller controls the walking device to move at normal speed. When the distance detection device detects an obstacle within the set deceleration range, the distance detection device controls the controller to switch to deceleration walking mode. The device sends operation commands to the controller via the enable button and joystick, and the controller controls the walking device to walk at a snail speed. When the distance detection device detects an obstacle within the set deceleration range and slowly moves to the parking range, the distance detection device controls the controller to switch to anti-pinch parking mode. When the enable button and the joystick send an operation command to the controller, the controller controls the walking device to forcibly stop walking. When the vehicle needs to be moved after entering the anti-pinch parking mode, press the forced walking unlock button continuously while simultaneously pressing the enable button and the joystick to send an operation command to the controller. At this time, the controller will control the walking device to move at a snail speed.

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