Walking limiting device and aerial work platform

Abstract

The utility model relates to the technical field of aerial work platforms, in particular to a walking limiting device which comprises a supporting rod, a base and a limiting mechanism electrically connected with an external controller, the supporting rod is arranged on the base, the limiting mechanism is arranged on the supporting rod through a connecting piece, and the limiting mechanism comprises a limiting piece and a limiting switch. The limiting piece is hinged to the limiting switch, the limiting piece rotates around the limiting switch to control opening and closing of a normally-closed contact in the limiting switch, and the normally-closed contact is connected with an external controller in series. According to the walking limiting device and the aerial work platform, walking can be forbidden immediately when the aerial work platform ascends to the target height, and the working environment of the aerial work platform becomes safer, more reliable and higher in efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of aerial work platforms, in particular to a walking restriction device and an aerial work platform. Background Art

[0002] An aerial work platform is a professional equipment that lifts people or equipment tools to a specified height for work; aerial work platforms come in many forms, mainly scissor type, folding arm type, straight arm type, etc.

[0003] The existing solution is to calibrate the height that needs to be restricted through the angle sensor, and transmit the angle sensor signal to the controller after lifting. The controller compares the real-time height with the calibrated height through calculation. If the height is greater than or equal to the calibrated height, the vehicle will be prohibited from moving. This solution has inaccurate detection, large errors, and safety hazards, and cannot meet customer needs. Utility Model Content

[0004] The utility model aims to provide a walking restriction device and an aerial work platform, which can immediately prohibit walking when the aerial work platform is raised to a target height, thereby making the working environment of the aerial work platform safer, more reliable and more efficient.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] In the first aspect, the utility model provides a walking restriction device, including a support rod, a base and a limit mechanism electrically connected to an external controller, the support rod is arranged on the base, the limit mechanism is arranged on the support rod through a connecting member, the limit mechanism includes a limit member and a limit switch, the limit member is hinged to the limit switch, the limit member rotates around the limit switch to control the opening and closing of the normally closed contact in the limit switch, and the normally closed contact is connected in series with the external controller.

[0007] In combination with the first aspect, further, the connecting member includes a U-shaped plate, and the U-shaped plate is arranged on the top end of the support rod.

[0008] In combination with the first aspect, further, a protective shell is detachably provided on the U-shaped plate, and the limit switch is arranged in the protective shell.

[0009] In combination with the first aspect, further, the limit member and the limit switch are hinged by a rocker, one end of the rocker is hinged to the limit switch, and the other end of the rocker is connected to the limit member, and the end of the rocker hinged to the limit switch controls the opening and closing of the normally closed contact in the limit switch.

[0010] In combination with the first aspect, further, the limiting member includes a roller, and the roller is rotatably connected to the rocker.

[0011] In combination with the first aspect, further, the support rod includes an inner tube and an outer tube, the inner tube is sleeved in the outer tube and the inner tube and the outer tube are slidably connected.

[0012] In a second aspect, the utility model provides an aerial work platform equipped with a walking restriction device.

[0013] Compared with the prior art, the utility model has the following beneficial effects: it can immediately prohibit walking when the aerial work platform reaches the target height, making the working environment of the aerial work platform safer, more reliable and more efficient;

[0014] The walking restriction device provided by the utility model controls the operation and stop of an external controller through a limit mechanism, connects the limit mechanism to a support rod through the setting of a connecting piece, controls the opening and closing of a normally closed contact in the limit switch through the limit member being hinged with the limit switch, and controls the operation and stop of the external controller through the normally closed contact and the controller being connected in series; through the setting of a U-shaped plate, it is convenient to detachably set the protective shell on the U-shaped plate, so as to facilitate the installation of the limit switch; the limit member and the limit switch are hinged through a rocker, and the limit member drives the rocker to rotate when the limit member moves, so as to control the opening and closing of the normally closed contact in the limit switch through the rocker; the limit member is connected to the rocker through a roller for rotation, and the friction between the roller and the outside is reduced through a rolling connection; the inner tube and the outer tube are connected in a sliding manner to adjust the height of the support rod, so as to adjust the height of the prohibited walking;

[0015] By installing a travel restriction device on the aerial work platform, the travel of the aerial work platform can be restricted when the aerial work platform reaches the target height. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a walking restriction device and an aerial work platform provided in an embodiment of the utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the structure of the restricted walking device.

[0018] The markings in the attached drawings are: 1. base; 2. limit mechanism; 201. limit member; 202. limit switch; 3. connector; 4. protective shell; 5. rocker; 6. inner tube; 7. outer tube; 8. travel restriction device; 9. aerial work platform. DETAILED DESCRIPTION

[0019] The technical solution of the present application is further described in detail below in conjunction with specific implementation methods.

[0020] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments may be combined with each other.

[0021] Embodiment 1:

[0022] This embodiment provides a walking restriction device, such as Figure 1 As shown, it includes a support rod, a base 1 and a limit mechanism 2 electrically connected to an external controller, the support rod is arranged on the base 1, the limit mechanism 2 is arranged on the support rod through a connecting member 3, the limit mechanism 2 includes a limit member 201 and a limit switch 202, the limit member 201 is hinged to the limit switch 202, the limit member 201 rotates around the limit switch 202 to control the opening and closing of the normally closed contact in the limit switch 202, the normally closed contact is connected in series with the external controller, and the operation and stop of the external controller are controlled by the limit mechanism 2, the limit mechanism 2 is connected to the support rod by the setting of the connecting member 3, the limit mechanism 2 is hinged to the limit switch 202 by the limit member 201, the opening and closing of the normally closed contact in the limit switch 202 are controlled, and the operation and stop of the external controller are controlled by the normally closed contact and the controller in series.

[0023] In this embodiment, Figure 1 As shown, the connecting member 3 includes a U-shaped plate, which is arranged at the top end of the support rod. A protective shell 4 is detachably provided on the U-shaped plate by bolts, and a limit switch 202 is arranged in the protective shell 4. Through the setting of the U-shaped plate, it is convenient to detachably set the protective shell 4 on the U-shaped plate, so as to facilitate the installation of the limit switch 202.

[0024] In this embodiment, Figure 1 As shown, the limit member 201 and the limit switch 202 are hinged through the rocker 5, one end of the rocker 5 is hinged to the limit switch 202, and the other end of the rocker 5 is connected to the limit member 201. The end of the rocker 5 hinged to the limit switch 202 controls the opening and closing of the normally closed contact in the limit switch 202. The limit member 201 and the limit switch 202 are hinged through the rocker 5. When the limit member 201 moves, it drives the rocker 5 to rotate, thereby controlling the opening and closing of the normally closed contact in the limit switch 202 through the rocker 5. In this embodiment, the limit member 201 includes a roller, which is rotatably connected to the rocker 5 and rotatably connected to the rocker 5 through the roller. The friction between the roller and the outside is reduced through the rolling connection. In this embodiment, the rocker 5 is made of elastic material. In this embodiment, an elastic reset member may also be provided between the rocker 5 and the limit switch 202, and the elastic reset member includes a spring.

[0025] In this embodiment, Figure 1 As shown, the support rod includes an inner tube 6 and an outer tube 7. The inner tube 6 is sleeved in the outer tube 7 and the inner tube 6 is slidably connected to the outer tube 7. In this embodiment, a lifting rod is fixedly connected to the top of the inner wall of the inner tube 6, and a rotating rod is threadedly connected to the bottom of the lifting rod. A motor is arranged at the bottom of the support rod, and the output end of the motor is fixedly connected to the rotating rod. The rotating rod is driven to rotate by the motor, thereby controlling the inner tube 6 to slide up and down in the outer tube 7, so as to adjust the height of the support rod, thereby adjusting the height of the prohibited walking.

[0026] When using this device, if Figure 1-2 As shown, the base 1 is first fixed to the aerial work platform 9 by screws, and the control motor drives the rotating rod to rotate, thereby driving the lifting rod threadedly connected to the rotating rod to move up and down, and the lifting rod drives the inner tube 6 fixed thereto to rise and fall, adjust the height of the support rod, and rotate the rocker 5 so that the angle between the rocker 5 and the limit switch 202 is 45 degrees, so that the limit member 201 reaches the target height, and the limit member 201 abuts against the aerial work platform 9. At this time, the normally closed contact in the limit switch 202 is in a closed state, and the aerial work platform 9 is controlled to move by the controller. When the aerial work platform 9 is raised, the roller rolls on the aerial work platform 9. At this time, the angle between the rocker 5 and the limit switch 202 remains unchanged. When the aerial work platform 9 is raised to the target height, the roller is separated from the aerial work platform 9. Under the elastic force, the rocker 5 rotates. As the rocker 5 rotates, the normally closed contact in the limit switch 202 is disconnected, so that the controller connected in series with the normally closed contact is powered off, thereby stopping the aerial work platform 9 from moving.

[0027] Embodiment 2:

[0028] This embodiment provides an aerial work platform, such as Figure 1-2 As shown, the walking restriction device 8 in Example 1 is installed. By installing the walking restriction device 8 on the aerial work platform 9, the walking of the aerial work platform 9 is restricted when the aerial work platform 9 reaches the target height. When the aerial work platform 9 is raised to the target height, the walking is immediately prohibited, making the working environment of the aerial work platform 9 safer, more reliable and more efficient.

[0029] The above are only preferred implementations of the utility model. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the utility model. These should also be regarded as the protection scope of the utility model. These will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. A walking restriction device, characterized in that: include: A support rod, a base (1), and a limit mechanism (2) for electrically connecting to an external controller, wherein the support rod is arranged on the base (1), the limit mechanism (2) is arranged on the support rod via a connecting member (3), the limit mechanism (2) comprises a limit member (201) and a limit switch (202), the limit member (201) is hinged to the limit switch (202), the limit member (201) rotates around the limit switch (202) to control the opening and closing of a normally closed contact in the limit switch (202), and the normally closed contact is connected in series with the controller.

2. The travel restriction device according to claim 1, characterized in that: The connecting member (3) comprises a U-shaped plate, and the U-shaped plate is arranged on the top end of the supporting rod.

3. The walking restriction device according to claim 2, characterized in that: The U-shaped plate is detachably provided with a protective shell (4), and the limit switch (202) is arranged in the protective shell (4).

4. The travel restriction device according to claim 1, characterized in that: The limit member (201) and the limit switch (202) are hinged via a rocker (5); one end of the rocker (5) is hinged to the limit switch (202); the other end of the rocker (5) is connected to the limit member (201); and the end of the rocker (5) hinged to the limit switch (202) controls the opening and closing of the normally closed contact in the limit switch (202).

5. The travel restriction device according to claim 4, characterized in that: The limiting member (201) comprises a roller, and the roller is rotatably connected to the rocker (5).

6. The travel restriction device according to claim 1, characterized in that: The support rod comprises an inner tube (6) and an outer tube (7); the inner tube (6) is sleeved inside the outer tube (7) and the inner tube (6) and the outer tube (7) are slidably connected.

7. An aerial work platform, characterized in that: A travel restriction device according to any one of claims 1 to 6 is installed.

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