RU2545698C1 - Manipulator crane at truck - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: manipulator crane comprises truck, column stationary bed, swivel column, boom sections, hydraulic cylinders of control over sections, hook cartridge, cargo winch, counterweight, mechanism of bracing jacks and crane rotary mechanism. Crane counterweight is composed of the lever and weight secured at separate swivel column on crane frame to turn and to be locked at transportation position and at LH or RH working positions. Crane bracing jacks include hydraulic cylinder and bracket to allow the crane boom to rest on bracing jack bracket at lower working position.

EFFECT: minimised overturning moment, increased retaining moment.

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Description

The invention relates to construction cranes, namely, truck mounted cranes for carrying out evacuation work on roads in mountainous terrain with a limited width of the carriageway.

Known on-board crane on a truck for loading and unloading (see book: Construction vehicles: Handbook: 2 volumes. T.1: Machines for the construction of industrial, civil structures and roads. Under the general editorship of E.N. Kuzina. - 5th ed. Revised. - M.: Mechanical Engineering, 1991, S.225-227) [1]. A known crane-manipulator [1] includes a truck, a rotary crane column, an arrow containing the main and additional sections, hydraulic cylinders for controlling the boom sections, a rotary mechanism for rotating the crane column, outriggers.

The disadvantage of the crane is the low stability of the rotary column due to the lack of counterweight and the small outreach of the cargo hook mounted on the head of the boom.

Known short-base crane on a special biaxial chassis, designed to perform loading and unloading operations (see book: Pneumowheel and caterpillar cranes. S.P. Epifanov, V.I. Polyakov. - M .: Higher school, 1985. - P.190 -191) [2].

The known design [2], used as a prototype, contains a base chassis, a slewing ring, on which a telescopic boom with a boom lifting hydraulic cylinder, a hook clip, a cargo winch, a counterweight, a swing platform, and outriggers is mounted.

A disadvantage of the known device [2] is the limited radius of the hook and low stability when the deviation of the hook cage with the load from a vertical position. The great complexity of the design, due to the presence of a special chassis of low-volume design, a complex telescopic boom, are the disadvantages of the device [2]. The main disadvantage of the known devices [1, 2], as well as other known cranes, is the inability to perceive lateral loads when the hook deviates from a vertical vertical position. Lateral loads on the crane hook contribute to its overturning.

The objective of the invention is to give the crane mounted on a truck, properties that provide the ability to perceive on the hook the lateral forces parallel to the slope of the embankment of the road in mountainous terrain with a limited width of the carriageway.

The problem is solved in such a way that the truck mounted crane contains the truck’s basic chassis, fixed crane base, crane slewing column, boom sections, boom section hydraulic cylinders, hook clip, cargo winch, counterweight, crane outrigger mechanism, rotary mechanism crane columns, according to the claimed invention, the counterweight of the crane is made in the form of a lever and a load, mounted on a separate rotary column on the frame of the crane with the possibility of rotation and fixing in transport orthn, left and right working positions; the outriggers of the crane comprise a hydraulic cylinder and an arm made with the possibility of supporting the boom of the crane in the lower working position on the outrigger arm.

In other words, the problem is solved by finalizing the design of the counterweight, which in this invention is not connected to the rotary column of the crane boom, but is installed using the rotary column on the crane frame. At the same time, in the transport position, as well as the left and right working positions, the counterweight is installed and fixed on the frame of the crane with the help of eyes and a pin.

This method of installing the counterweight in the transport and operating positions is favorable for the crane, due to its significant mass compared with the case of mounting it on a rotary column of the crane together with a cargo winch.

In addition, the completion of the outriggers of the crane gives the crane the ability to support the crane boom in the lower position on the bracket of the outrigger and gives the crane a new quality that allows you to perceive lateral loads with the help of a crane hook, necessary to pull objects using a hoist of a hoist, located away from the crane.

The technical result of the claimed invention is achieved by minimizing the shoulder of the tipping moment due to the lateral traction force in the rope and creating, with the help of a counterweight and outriggers, a significant balancing moment of the crane-manipulator.

The claimed invention is illustrated by drawings. Figure 1 shows a General view of the crane side view in the transport position; figure 2 - General view of the crane-manipulator in the working position; figure 3 shows the operation of the crane on a steep slope.

The truck mounted crane contains: vehicle chassis 1; fixed base 2 columns of the crane; rotary column 3; the first section of the boom 4; second section of boom 5; hydraulic cylinders 6, 7 control the first and second sections; freight winch 8; guide rollers 9; guide blocks 10, 11, 12, 13, 14, 15; hook 16 with a rope and additional weight; counterweight 17 with bracket; counterweight pivoting column 18; counterweight support frame 19; an eye 20 for fixing the counterweight in the transport position; remote support bracket 21; a plate 22 remote support; hydraulic cylinder 23 remote support; an eye 24 for fixing the counterweight in the working position (figure 2).

Figure 2 is additionally indicated by the letters A, B, C of the position of the crane: A is the horizontal position of the first section of the boom of the crane; B - working position of the crane jib parallel to the slope of the road; In - the maximum raised position of the first section of the boom. Figure 3 additionally shows the dimensions of h and H, which denote: h - shoulder forces in the rope relative to the tipping edges; N - the shoulder of the gravity of the counterweight.

Crane-manipulator on a truck operates as follows.

Figure 1 shows the crane after performing a transport cycle moving to the place of work. To bring it into position, the crane boom is moved to position A, shown in figure 2. After that, the latch is removed from the eyes 20 (see FIG. 1) and the counterweight is rotated to the position along the boom shown in FIG. 2.

The counterweight 17 is based on an additional support frame 19 and is freely mounted on the rotary column 18 with the possibility of rotation around the vertical axis and fixation in three positions: transport and working positions - left and right.

The working position of the counterweight is fixed by installing a latch in the eyelet 24 (figure 2). Remote brackets 21 with hydraulic cylinders 23 are installed in the operating position shown in figure 2, the section of the boom 4 is supported on the lever 21 of the outrigger (position B). After the boom rests on the outrigger bracket, a rigid structure is formed which rests on the outrigger plate 22. The hook 16 with the rope is pulled to its original position to capture the pull-up object (figure 3).

In the position shown in figure 3, the force in the rope creates a tipping moment of the crane relative to the fulcrum in the plate 22 on the minimum shoulder h. At the same time, the load of the counterweight 17 creates a holding moment on the maximum arm H. Thus, in the position shown in FIG. 3, the crane manipulates the remote objects by pulling it 16. Pulling objects with a hook 16 is carried out by turning on the cargo winch 8 for winding the rope onto the drum of the cargo winch 8.

When pulling objects with a hook 16, the boom section 5 using the hydraulic cylinder 7 provides additional movements in order to reduce friction and create additional active forces.

After pulling the object to the carriageway, the crane loads it onto its own chassis or adjacent platforms.

The developed design of the crane provides the pulling of objects from the roadsides to the carriageway for subsequent transportation.

Claims (1)

A loader crane containing a truck, a fixed column base, a rotary column, boom sections, section control hydraulic cylinders, a hook clip, a load winch, a counterweight, an outrigger mechanism, a rotary crane mechanism, characterized in that the crane counterweight is made in the form of a lever and a load fixed on a separate rotary column on the crane frame with the possibility of fixation in transport, left or right working positions; remote support of the crane containing the hydraulic cylinder and the bracket, made with the possibility of supporting the boom of the crane in the lower working position on the bracket of the external support.

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