CN100494042C - Self-propelled mast type aerial work platform - Google Patents

Abstract

The present invention relates to aloft work machinery, and is especially mast type aloft work platform comprising chassis, mast with aloft work stage in the top, controller, hydraulic station and mast elevating hydraulic cylinder. The mast type aloft work platform features the dispersed walking wheels driven with hydraulic motor obtaining pressure medium from the hydraulic station and the steering wheel driven with the steering oil cylinder obtaining pressure medium from the hydraulic station. The mast type aloft work platform can move easily during aloft work and has small covered area, less aloft work ready time and auxiliary work time, and high work efficiency.

Description

Self-propelled mast type aerial work platform

technical field

The invention relates to a high-altitude operation machine, in particular to a self-propelled mast type high-altitude operation platform capable of moving during work.

Background technique

Existing aerial work platforms for high-altitude operations, such as the four-mast aerial work platform described in the utility model patent with the notification number CN 2304648Y, include a chassis on which a motor, a hydraulic station, and a hydraulic control unit are arranged. , electrical control device, walking power device and working ladder, there are four anti-tilt outriggers and four screw rod leveling outriggers at the corners around the chassis. When in use, first move the aerial work platform to a working position, prop up the anti-tilt outriggers and screw leveling outriggers to the ground, and then expand the mast to lift the work platform to high altitude.

The aerial work platform with this structure needs to prop the legs on the chassis to the ground during work to prevent the whole machine from tilting or even overturning, but there are also some defects as follows:

1. When working, the outriggers are extended to the ground, and the whole machine is fixed at a specific position to work, so that the whole machine cannot walk when it is in the working state (that is, the mast is in the unfolded state). If you want to change the working position, you must retract the whole machine It can only be moved, so there are problems such as long preparation time and auxiliary work time, and low work efficiency.

2. Since the outriggers are stretched to the ground during work, the floor area is relatively large, and it is easy to be disturbed by some factors during use, making it difficult to make the workbench close to the ideal working position. For example, it is difficult to make some workbenches work against the wall.

3. The chassis is light, which makes the center of gravity of the whole machine relatively high, and there are potential safety hazards that are easy to tilt or overturn.

Contents of the invention

The technical solution proposed by the present invention is to overcome the above-mentioned shortcomings of the aerial work platform, provide a self-propelled mast-type aerial work platform that can walk when the whole machine is working (that is, the mast is in the unfolded state), and has a small footprint, and further The work center of gravity of the whole machine is lowered, the work preparation time and auxiliary work time are reduced, and the work efficiency is improved.

The technical solution adopted by the present invention to solve the existing technical problems is: a self-propelled mast-type aerial work platform, including a chassis, a mast arranged on the chassis, a control device, a hydraulic station, and a pressure medium provided by the hydraulic station to drive the mast. Lifting and lifting hydraulic cylinder, the top of the mast is provided with a working table, which is characterized in that:

The chassis is also provided with traveling driving wheels and steering wheels scatteredly arranged, the traveling driving wheels are driven by hydraulic motors that obtain pressure medium from the hydraulic station, and the steering wheels are steered by the hydraulic motor that obtains pressure medium from the hydraulic station cylinder drive;

There are two steering wheels, both of which are respectively mounted on corresponding steering shafts via bearings, and the steering shafts are rotatably mounted on the lower part of the chassis and driven by the steering oil cylinder, and one of the steering shafts are connected by connecting rods;

There are two walking driving wheels, which are respectively connected to the output shafts of the corresponding hydraulic motors;

Moreover, the chassis is a box structure, and the components provided on the chassis constitute a counterweight device (such as a storage battery for providing power, etc.).

When the whole machine is in the working state (that is, the mast is in the unfolded state), the hydraulic station can be controlled by the control device to provide pressure medium to the hydraulic motor and steering cylinder, and drive the corresponding travel driving wheel and steering wheel to move. Move the whole machine to a new working position and continue to work (if there are too many mast sections, resulting in too high working center of gravity of the whole machine, first lower the working platform to a certain height range to lower the center of gravity before moving the whole machine) . In this way, the working position of the whole machine can be moved without fully retracting the mast, which reduces the preparation time and auxiliary work time, and improves work efficiency; at the same time, compared with the existing technology, its workbench is easier to approach the ideal working position. Utilize the weight of the components (such as battery, etc.) installed on the chassis to lower the working center of gravity of the whole machine, prevent the whole machine from tilting or even overturning when it is working, and ensure the stability and safety of the whole machine.

The steering wheel is mounted on the steering shaft via a bearing, and the steering shaft is rotatably mounted on the lower part of the chassis and driven by a steering oil cylinder. The pressure medium is provided by the hydraulic station, which drives the plunger of the steering cylinder for telescopic movement, and drives the steering shaft for corresponding steering, thereby realizing the steering movement of the steering wheel.

There are two steering wheels, which are respectively installed on two corresponding steering shafts, and the steering shafts are connected by connecting rods. This is convenient to realize that the two steering wheels can be steered simultaneously.

There are two walking driving wheels, which are respectively connected to the output shafts of the corresponding hydraulic motors. The two driving wheels are distributed on the chassis, and the hydraulic motor is driven by the hydraulic station, and the driving wheel is driven by the hydraulic motor.

As a preference, the number of groups of masts can be set to 1-6 groups. According to different situations, different numbers of mast groups are used.

Preferably, one side of the workbench is provided with a telescopic auxiliary workbench. Further expand the working scope of the workbench.

The beneficial effect of the present invention is that by adding walking devices such as driving wheels and steering wheels, the whole machine can walk by itself without completely retracting the mast, and it is convenient to change the working position, thereby reducing the work preparation time and auxiliary work time ,Improve work efficiency.

At the same time, under the premise of not affecting the safety and stability of the whole machine, the present invention cancels the setting of the outriggers, and by increasing the weight of the components on the chassis, the working center of gravity of the whole machine is reduced, and the The footprint of the chassis is reduced, making it easy for the whole machine to approach the ideal working position.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation when the present invention is in working state;

Fig. 3 is the structural representation of mast among the present invention;

Fig. 4 is a structural schematic diagram of the chassis in the present invention.

In the figure: 1, chassis; 13, working ladder; 15, charger; 2, mast; 3, hydraulic station; 31, oil pipe; 32, lifting hydraulic cylinder; 33, hydraulic motor; 34, steering cylinder; 4, steering wheel; 41 steering shaft; 42, connecting rod; 5, driving wheel for travel; 6, operation platform; 61, auxiliary operation platform.

Detailed ways

As shown in Figures 1 to 4, the self-propelled mast-type aerial work platform includes a chassis 1, a mast 2, a hydraulic system, a traveling device, and a workbench 6. Among them, the chassis 1 is a box structure, and a control device is arranged on it. , charger 15, hydraulic station 3 and working ladder 13, the control device includes various opening and closing devices and buttons that control the actions of each part of the complete machine, and four groups of masts 2 are evenly distributed on the chassis 1 to make the work of the complete machine The center of gravity is located between the four sets of masts 2 to ensure the stability of the whole machine. Each set of masts is provided with a lifting hydraulic cylinder 32 connected to the hydraulic station 3 through the oil pipe 31. The workbench 6 is set on the top of the mast 2. One side of the workbench 6 is provided with a telescopic auxiliary workbench 61; at the same time, two traveling driving wheels 5 and two steering wheels 4 are arranged separately under the chassis 1, so that the center of gravity of the entire aerial work platform is located on four sides. Between the two wheels, its stability has been enhanced; the axles of the two steering wheels 4 are respectively two steering shafts 41 driven by the steering cylinder 34, and the two steering shafts 41 are connected by a connecting rod 42 to realize linkage.

There are four sets of masts 2 arranged on the chassis 1 (the number of sets of masts is not limited to 4 sets, and can be set to 1-6 sets according to the actual situation), and each set of masts is composed of multiple single-section mast sections The number of mast sections depends on the design height of the aerial work platform, and the number of sections is generally 3 to 7; the mast 2 is made of aluminum alloy profiles, and its cross-section is a rectangular structure; the mast 2 There is a lifting hydraulic cylinder 32 connected to the hydraulic station 3 through the oil pipe 31, and the lowermost section of the mast section is fixed on the chassis 1, the uppermost section of the mast section is fixedly connected to the workbench 6, and the other mast sections are movable masts. Column, the top of movable mast is provided with a sprocket wheel, has chain to walk around from sprocket wheel, and chain two ends are respectively fixed on adjacent two section masts and bottom and top of sprocket wheel place mast section.

The control device of the present invention is realized by controlling the online power supply or backup power supply to make the motor drive the hydraulic station 3, and operating each hydraulic control unit that controls the lifting hydraulic cylinder 32, the hydraulic motor 33 and the steering cylinder 34 respectively; wherein the hydraulic system includes Hydraulic station 3, hydraulic control unit, lifting hydraulic cylinder 32, hydraulic motor 33, steering cylinder 34 and oil pipe 31. By operating the hydraulic control unit, the hydraulic station 3 synchronously delivers pressure oil to the lifting hydraulic cylinders 32 in each group of masts 2, and the lifting hydraulic cylinders 32 lift up the movable mast, and at the same time drive each section of the mast through the sprocket and chain The column is lifted synchronously to realize the lifting movement of the workbench; at the same time, the hydraulic station 3 also sends pressure oil to the steering cylinder 34 and the hydraulic motor 33 to provide steering power and walking power for the steering wheel 4 and the driving wheel 5 respectively.

The mode of work of the present invention is realized like this:

Drive the aerial work platform to the working position for positioning (for example, by braking or passing obstacles to prevent the wheels from rolling), and the aerial work personnel walk to the work platform through the working ladder, and manipulate the control device to make the hydraulic station 3 work, and set it in each group of masts. The lifting hydraulic cylinder 32 in the column 2 delivers pressure oil at the same time, so that the plunger of the lifting hydraulic cylinder 32 is lifted at the same time, pushing the corresponding movable mast upwards, and through the action of the chain and sprocket, each section of the mast rises simultaneously, so that Push the workbench 6 up, and when it reaches the required height, operate the control device to stop the motor, and the pressure oil is kept in the lifting hydraulic cylinder 32 under the action of the pressure valve, so that the workbench is kept at the height required for the operation; When changing the working position, the control device can be operated to make the hydraulic station 3 deliver pressure oil to the steering cylinder 34 connected to the steering shaft 41 installed on the lower part of the chassis 1 and the hydraulic motor 33 connected to the driving wheel 5 to drive the steering wheel 4 respectively. And walking driving wheel 5 action, realize that the whole machine can move and walk under the working state, help the whole machine to move to a new working position. When the working platform needs to descend, the control device can be manipulated to make the pressure oil in the lifting hydraulic cylinder 32 return to the hydraulic station 3. At this time, the lifting hydraulic cylinder 32 plunger, the mast 2 and the workbench 6 then descend together.

The core of the present invention is to add a walking device under the chassis of the mast-type aerial work platform, so that the whole machine can be shifted or walked under the working state. To manufacture this product, therefore, as long as the related products are designed and manufactured through the design content of the present invention, all belong to the technical solution of the present invention.

Claims (3)

1. A self-propelled mast-type aerial work platform, including a chassis (1), a mast (2) set on the chassis (1), a control device, a hydraulic station (3), and a pressure medium provided by the hydraulic station (3). A lifting hydraulic cylinder (32) that drives the mast (2) to lift, the top of the mast (2) is provided with a working platform (6), and it is characterized in that the chassis (1) is also provided with scattered Walking drive wheel (5) and steering wheel (4), described walking driving wheel (5) is driven by the hydraulic motor (33) that obtains pressure medium from hydraulic station (3), and described steering wheel (4) is driven by The hydraulic station (3) obtains the drive of the steering oil cylinder (34) of the pressure medium; There are two steering wheels (4), which are respectively mounted on corresponding steering shafts (41) via bearings, and the steering shafts (41) are rotatably mounted on the bottom of the chassis (1) and are driven by the The steering cylinder (34) is driven, and the steering shaft (41) is connected by a connecting rod (42); There are two walking drive wheels (5), which are respectively connected to the output shafts of the corresponding hydraulic motors (33); In addition, the chassis (1) has a box structure, and the components provided on the chassis (1) form a counterweight device. 2. The self-propelled mast-type aerial work platform according to claim 1, characterized in that the number of groups of the masts (2) can be set to 1-6 groups. 3. The self-propelled mast-type aerial work platform according to claim 1, characterized in that a telescopic auxiliary workbench (61) is provided on one side of the workbench (6).

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