CN112498245B - High-altitude operation device capable of automatically placing and withdrawing boarding ladder and operation method - Google Patents
High-altitude operation device capable of automatically placing and withdrawing boarding ladder and operation method Download PDFInfo
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- CN112498245B CN112498245B CN202011411955.8A CN202011411955A CN112498245B CN 112498245 B CN112498245 B CN 112498245B CN 202011411955 A CN202011411955 A CN 202011411955A CN 112498245 B CN112498245 B CN 112498245B
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- support rod
- telescopic
- ladder
- rod
- ground
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R3/00—Arrangements of steps or ladders facilitating access to or on the vehicle, e.g. running-boards
- B60R3/02—Retractable steps or ladders, e.g. movable under shock
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention provides an aerial working device for automatically placing and retracting an upper car ladder and an operation method, wherein the aerial working device for automatically placing and retracting the upper car ladder comprises an extension ladder storage box arranged on a frame, an extension cylinder is arranged in the extension ladder storage box, and the other end of the extension cylinder is connected with an extension ladder mechanism, so that the automatic placing and retracting of the extension ladder are realized, the structure is simple, and the labor is saved; the length of the cat ladder can be automatically placed according to the height of the car body, so that the problem that the workers are difficult to get on due to the fact that the getting-on ladder is higher in ground is solved; the telescopic ladder mechanism comprises a sliding rod, a supporting rod assembly, a pedal assembly and a ground contact detection device, wherein the ground contact detection device is arranged at the bottom end of the pedal assembly, after the ground contact of the supporting rod assembly is detected, the telescopic ladder can not extend continuously, the telescopic ladder is protected from being damaged, and the service life of the telescopic ladder is greatly prolonged.
Description
Technical Field
The invention belongs to the technical field of engineering equipment, and particularly relates to an automatic placement and retraction boarding ladder and an overhead working device.
Background
As a special vehicle for manned aerial work, aerial work vehicles are increasingly replacing climbing work modes with extremely high risks in the past. With the development of urban construction, the overhead working truck is not only used for large-scale infrastructures such as wharfs, airports, water conservancy, power stations, gardens and the like, but also widely applied to urban facility installation and management such as street lamps, communication, traffic, advertising, photography and the like.
The overhead working truck comprises an automobile chassis, supporting legs, an auxiliary frame, a turntable, a boom and other main components. When the overhead working truck works, the supporting legs are required to be supported up, so that the tires of the chassis of the truck are separated from the ground, and the truck can be started. Because the trafficability of the whole vehicle is considered, when the boarding ladder is generally arranged, the lowest end of the boarding ladder cannot be too low from the ground, otherwise, the trafficability of the whole vehicle is affected. However, when the overhead working truck, particularly a large-sized overhead working truck, works, after the supporting legs are supported, the ground-leaving height of the boarding ladder is very high, when a person gets on the truck, the first step is high, the worker gets on the truck difficultly, and the boarding ladder needs manpower to place and recycle, so that the manpower is consumed; the angle of the ladder is steep, and the climbing and the getting off are inconvenient.
Disclosure of Invention
The invention mainly provides an overhead working device for automatically placing and retracting an boarding ladder and an operation method thereof, which are used for solving the technical problems in the background art.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides an automatic overhead working equipment who places and withdraw of boarding ladder, includes the extension ladder containing box of installing on the frame, install flexible hydro-cylinder in the extension ladder containing box, the other end of extension cylinder is connected with extension ladder mechanism, extension ladder mechanism is including slide bar, bracing piece subassembly, step board subassembly and touch ground detection device, the one end of slide bar is connected flexible hydro-cylinder, the other end articulates has the bracing piece subassembly, step board subassembly articulates on the bracing piece subassembly, just step board subassembly's bottom is provided with touch ground detection device, the front end of extension ladder containing box in the bottom position of slide bar still is provided with the rolling pulley.
Further, the bracing piece subassembly includes a bracing piece, no. two bracing pieces, no. three bracing pieces, no. four bracing pieces, no. one bracing piece, no. two one end of bracing piece with the sliding rod is articulated, the other end respectively with No. three bracing pieces, no. four bracing pieces are articulated, no. one the bracing piece with No. three the bracing piece No. two bracing pieces with all be provided with the angle stopper between No. four bracing pieces.
Further, the step plate assembly comprises an upper step plate and a lower step plate, one end of the upper step plate is hinged to the upper end of the first support rod and the upper end of the third support rod connecting portion, the other end of the upper step plate is hinged to the upper end of the second support rod and the upper end of the fourth support rod connecting portion, two ends of the lower step plate are respectively hinged to the lower ends of the third support rod and the fourth support rod, and the ground contact detection device is installed at the lower end of the lower step plate.
Further, touch ground detection device includes detection switch, fixed block, telescopic link and touch the ground, the fixed block sets up on the lateral wall of step down the board, the telescopic link with the fixed block passes through built-in reset spring and connects, the lower extreme of telescopic link is provided with touch the ground, detection switch sets up step down the upper end of board, detection portion downwards and be close to the upper end of telescopic link.
An operation method for automatically placing and withdrawing an boarding ladder comprises the following steps:
step one, when a boarding ladder is required to be placed, a telescopic cylinder stretches out, and the telescopic cylinder drives the whole telescopic ladder mechanism to stretch out;
step two, after the lower pedal plate, the third support rod and the fourth support rod extend along the rolling pulleys, the lower pedal plate, the third support rod and the fourth support rod form a parallelogram to droop under the action of gravity and an angle limiting block, and similarly, after the upper pedal plate, the first support rod and the second support rod extend along the rolling pulleys, the lower pedal plate, the third support rod and the fourth support rod form the parallelogram to droop under the action of gravity and the angle limiting block;
step three, because the ground-leaving rigidity of the whole vehicle is different along with the difference of the heights of the supporting legs, the extension amount of the telescopic ladder is different, and after the lower stepping plate touches the ground, the ground-touching detection device contacts with the ground through the ground-touching head on the telescopic rod, and the telescopic rod stops retracting and contacts with the detection switch;
and fourthly, detecting a return signal of the switch, wherein the telescopic oil cylinder does not act any more, and the telescopic ladder is placed.
Step five: the retraction process and the placement process of the telescopic ladder are opposite.
The beneficial effects of the invention are as follows:
1. the telescopic oil cylinder is arranged in the telescopic ladder storage box and connected with the telescopic ladder mechanism, so that automatic placement and retraction of the telescopic ladder are realized, the structure is simple, and the labor is saved; can be according to the height of automobile body, the length of automatic placement cat ladder has solved because of getting on the bus ladder is higher from the ground, the difficult problem of staff getting on the bus.
2. An angle limiting block is arranged between the first supporting rod and the third supporting rod, between the second supporting rod and the fourth supporting rod, and the ladder tread plate is always kept horizontal by utilizing the parallelogram principle.
3. The bottom of the lower pedal is provided with the ground contact detection device, after the ground contact, the telescopic ladder can not extend continuously, the telescopic ladder is protected from being damaged, and the service life of the telescopic ladder is greatly prolonged.
Drawings
FIG. 1 is a schematic view of an overhead working assembly for automatically placing and retrieving a boarding ladder;
FIG. 2 is a schematic diagram of a ground contact detection device;
FIG. 3 is a flow chart of a placement of a telescoping ladder;
in the figure, 1, an extension ladder storage box, 2, an extension cylinder, 3, a sliding rod, 41, a first supporting rod, 42, a second supporting rod, 43, a third supporting rod, 44, a fourth supporting rod, 51, an upper stepping plate, 52, a lower stepping plate, 6, a ground contact detection device, 61, a detection switch, 62, a fixed block, 63, an extension rod, 64, a ground contact head, 7 and a rolling pulley.
Detailed Description
In order that the invention may be more fully understood, a more particular description of the invention will be rendered by reference to the appended drawings, in which several embodiments of the invention are illustrated, but which may be embodied in different forms and are not limited to the embodiments described herein, which are, on the contrary, provided to provide a more thorough and complete disclosure of the invention.
It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to the other element, it may be directly connected to the other element or intervening elements may also be present, the terms "vertical", "horizontal", "left", "right" and the like are used herein for the purpose of illustration only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly connected to one of ordinary skill in the art to which this invention belongs, and the knowledge of terms used in the description of this invention herein for the purpose of describing particular embodiments is not intended to limit the invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, an automatic placement and retraction aerial working device for a boarding ladder includes a telescopic ladder storage box 1 mounted on a frame, a telescopic cylinder 2 is mounted in the telescopic ladder storage box 1, the other end of the telescopic cylinder 2 is connected with a telescopic ladder mechanism, the telescopic ladder mechanism includes a sliding rod 3, a supporting rod assembly, a tread assembly and a ground contact detection device 6, one end of the sliding rod 3 is connected with the telescopic cylinder 2, the other end is hinged with the supporting rod assembly, the tread assembly is hinged on the supporting rod assembly, the bottom of the tread assembly is provided with a ground contact detection device 6, and a rolling pulley 7 is further arranged at the front end of the telescopic ladder storage box 1 at the bottom position of the sliding rod 3 for guiding when the telescopic ladder is placed or retracted.
In the above-mentioned structure, the bracing piece subassembly includes a bracing piece 41, no. two bracing pieces 42, no. three bracing pieces 43, no. four bracing pieces 44, a bracing piece 41, no. two bracing pieces 42 one end with the sliding rod 3 articulates, the other end respectively with No. three bracing pieces 43, no. four bracing pieces 44 articulates, a bracing piece 41 with No. three bracing pieces 43 No. two bracing pieces 42 with all be provided with the angle stopper between No. four bracing pieces 44, restriction bracing piece subassembly becomes parallelogram whereabouts in the angle limiting block scope.
This embodiment is illustrated with two tread plates: the step plate assembly comprises an upper step plate 51 and a lower step plate 52, one end of the upper step plate 51 is hinged to the upper end of the connecting portion of the first support rod 41 and the third support rod 43, the other end of the upper step plate is hinged to the upper end of the connecting portion of the second support rod 42 and the fourth support rod 44, two ends of the lower step plate 52 are respectively hinged to the lower ends of the third support rod 43 and the fourth support rod 44, the ground contact detection device 6 is mounted at the lower end of the lower step plate 52, and the lower step plate 52 always maintains a relative horizontal position.
As shown in fig. 2, the ground contact detecting device 6 includes a detecting switch 61, a fixed block 62, a telescopic rod 63 and a ground contact head 64, the fixed block 62 is disposed on a side wall of the lower step plate 52, the telescopic rod 63 and the fixed block 64 are connected by a built-in return spring, the telescopic rod 63 can move relative to the fixed block 62, the ground contact head 64 is disposed at a lower end of the telescopic rod 63, the detecting switch 61 is disposed at an upper end of the lower step plate 52, and the detecting portion is downward and is close to an upper end of the telescopic rod 63.
As shown in fig. 3, an operation method for automatically placing and withdrawing an boarding ladder comprises the following steps:
step one, when a boarding ladder is required to be placed, a telescopic cylinder stretches out, and the telescopic cylinder drives the whole telescopic ladder mechanism to stretch out;
step two, after the lower pedal plate, the third support rod and the fourth support rod extend along the rolling pulleys, the lower pedal plate, the third support rod and the fourth support rod form a parallelogram to droop under the action of gravity and an angle limiting block, and similarly, after the upper pedal plate, the first support rod and the second support rod extend along the rolling pulleys, the lower pedal plate, the third support rod and the fourth support rod form the parallelogram to droop under the action of gravity and the angle limiting block;
step three, because the ground-leaving rigidity of the whole vehicle is different along with the difference of the heights of the supporting legs, the extension amount of the telescopic ladder is different, and after the lower stepping plate touches the ground, the ground-touching detection device contacts with the ground through the ground-touching head on the telescopic rod, and the telescopic rod stops retracting and contacts with the detection switch;
and fourthly, detecting a return signal of the switch, wherein the telescopic oil cylinder does not act any more, and the telescopic ladder is placed.
Step five: the retraction process and the placement process of the telescopic ladder are opposite.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the embodiments described above, but is intended to be within the scope of the invention, as long as such insubstantial modifications are made by the method concepts and technical solutions of the invention, or the concepts and technical solutions of the invention are applied directly to other occasions without any modifications.
Claims (2)
1. The high-altitude operation device for automatically placing and retracting the boarding ladder is characterized by comprising a telescopic ladder storage box (1) arranged on a frame, wherein a telescopic oil cylinder (2) is arranged in the telescopic ladder storage box (1), the other end of the telescopic oil cylinder (2) is connected with a telescopic ladder mechanism, the telescopic ladder mechanism comprises a sliding rod (3), a supporting rod assembly, a tread plate assembly and a ground contact detection device (6), one end of the sliding rod (3) is connected with the telescopic oil cylinder (2), the other end of the sliding rod is hinged with the supporting rod assembly, the tread plate assembly is hinged on the supporting rod assembly, the bottom of the tread plate assembly is provided with the ground contact detection device (6), and the front end of the telescopic ladder storage box (1) is further provided with a rolling pulley (7) at the bottom position of the sliding rod (3);
the support rod assembly comprises a first support rod (41), a second support rod (42), a third support rod (43) and a fourth support rod (44), one ends of the first support rod (41) and the second support rod (42) are hinged with the sliding rod (3), the other ends of the first support rod and the second support rod are respectively hinged with the third support rod (43) and the fourth support rod (44), and angle limiting blocks are arranged between the first support rod (41) and the third support rod (43) and between the second support rod (42) and the fourth support rod (44) to limit the support rod assembly to form parallelogram sagging in an angle limiting block range;
the pedal assembly comprises an upper pedal plate (51) and a lower pedal plate (52), one end of the upper pedal plate (51) is hinged to the upper end of the connecting part of the first supporting rod (41) and the third supporting rod (43), the other end of the upper pedal plate is hinged to the upper end of the connecting part of the second supporting rod (42) and the fourth supporting rod (44), the two ends of the lower pedal plate (52) are respectively hinged to the lower ends of the third supporting rod (43) and the fourth supporting rod (44), and the ground contact detection device (6) is arranged at the lower end of the lower pedal plate (52);
the ground contact detection device (6) comprises a detection switch (61), a fixed block (62), a telescopic rod (63) and a ground contact head (64), wherein the fixed block (62) is arranged on the side wall of the lower stepping plate (52), the telescopic rod (63) is connected with the fixed block (62) through a built-in reset spring, the lower end of the telescopic rod (63) is provided with the ground contact head (64), the detection switch (61) is arranged at the upper end of the lower stepping plate (52), and the detection head of the detection switch (61) is downwards close to the upper end of the telescopic rod (63).
2. An operation method for automatically placing and retracting an upper ladder based on the aerial work device for automatically placing and retracting an upper ladder according to claim 1, comprising the following steps:
step one, when a boarding ladder needs to be placed, a telescopic oil cylinder stretches out, and the telescopic oil cylinder drives the whole telescopic ladder mechanism to stretch out;
step two, after the lower pedal plate, the third support rod and the fourth support rod extend along the rolling pulleys, the lower pedal plate, the third support rod and the fourth support rod form a parallelogram to droop under the action of gravity and an angle limiting block, and similarly, after the upper pedal plate, the first support rod and the second support rod extend along the rolling pulleys, the lower pedal plate, the third support rod and the fourth support rod form the parallelogram to droop under the action of gravity and the angle limiting block;
step three, because the ground-leaving rigidity of the whole vehicle is different along with the difference of the heights of the supporting legs, the extension amount of the telescopic ladder is different, and after the lower stepping plate touches the ground, the ground-touching detection device contacts with the ground through the ground-touching head on the telescopic rod, and the telescopic rod stops retracting and contacts with the detection switch;
detecting a return signal of the switch, enabling the telescopic oil cylinder to not act any more, and finishing placement of the telescopic ladder;
and fifthly, the retraction process and the placement process of the telescopic ladder are opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011411955.8A CN112498245B (en) | 2020-12-04 | 2020-12-04 | High-altitude operation device capable of automatically placing and withdrawing boarding ladder and operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011411955.8A CN112498245B (en) | 2020-12-04 | 2020-12-04 | High-altitude operation device capable of automatically placing and withdrawing boarding ladder and operation method |
Publications (2)
| Publication Number | Publication Date |
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| CN112498245A CN112498245A (en) | 2021-03-16 |
| CN112498245B true CN112498245B (en) | 2023-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011411955.8A Active CN112498245B (en) | 2020-12-04 | 2020-12-04 | High-altitude operation device capable of automatically placing and withdrawing boarding ladder and operation method |
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| CN112498245A (en) | 2021-03-16 |
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