SU994625A1 - Working member of chain trencher - Google Patents

Description

(54) WORKING ORGAN OF THE CHAIN TRAWNER

one

The invention relates to chain-scraping excavators for digging trenches wider than the width of the tool.

The working equipment of a chain trencher excavator is known, which includes a scraper conveyor that can change the inclination of the chain branches by moving the levers hinged at the corners of the main rectangular frame and carrying the sprocket and drive sprocket 1 at their ends.

However, the known equipment, due to the constant dimensions of the main rectangular frame, does not allow to tear off (if necessary) trenches with vertical walls, although here vertical installation of one branch of the chain is envisaged, but only in a non-working (transport) position.

The closest to the invention in technical essence and the achieved result is a working body of a chain trencher, including a frame consisting of beams, its swing mechanism, driving and driven sprockets and an envelope of their endless cutting chain 2.

The disadvantage of this working body is the impossibility of opening trenches with different slope angles due to the constant frame dimensions.

The purpose of the invention is the discovery

 trenches with different angles of repose

optimum carrying capacity of scrapers.

The goal is achieved by the fact that in the working body of a chain trencher, including a frame made of 10 beams, its swing mechanism, leading and driven sprockets and the cutting chain enveloping them, the frame beams are articulated with each other, and two adjacent beams are telescopic and one of them equipped with a mechanism of extension.

The sliding parts of the telescopic beams are connected by means of a lever, and the frame is provided with a support leg, one end of which is hinged at the junction of the telescopic beams, and the other ball 20 is connected to the middle of the lever.

The extension mechanism is designed as a screw pair.

FIG. 1 shows the general layout of the working equipment; in fig. 2 - scheme

swing of the working body, in plan; in fig. 3 trench profile with a vertically falling chain branch (continuous line) and when it is tilted back (dotted line); in fig. 4 - frame, in extreme positions.

The working body of the chain trencher includes an endless rezushuyu chain 1, the mechanism of its drive 2 and swing 3, mounted on the thrower 4, connected by vertical hinges with a lifting frame 5, parallelogramm suspended from the base machine 6.

Endless cutting chain 1 tension on the frame of the working body, connected to the thrower by a three-point suspension and hydraulic cylinder 7, which serves to raise and lower the working body in the bottom. The frame of the working body is formed by one fixed 8 and two telescopic beams 9, pivotally interconnected. At the corners of the frame there is one leading 10 and two driven sprockets 11, which are surrounded by an endless cutting chain with a U-image, cutting elements and scrapers.

The sliding parts of the telescopic beams 9 are pivotally interconnected by a lever 12, which with its middle abuts the hinge at the end of the support post 13, the other end of which is pivotally fixed at the junction of the fixed parts of the telescopic beams 9. One of the beams 9 has a screw pair 14 for extending the telescope and fixing it in a certain position.

Before starting, depending on the category of soil and the width of the future trench, the angle of inclination of the walls of the trench is determined, on which with the help of a screw pair 14 on one of the beams 9 a non-movable beam 8 is installed. This is due to the fact that the sliding parts of the beams 9 are connected by means of a lever 12, resting its center on the support post 13, which carry out an inversely proportional change in the lengths of the beams 9, due to a constant chain length.

After this, the mechanism of the drive 2 and the swing 3 of the working body and the thrower of the thrower are turned on. Under the action of the hydraulic cylinder 7, the frame is lowered into the ground to create the optimum tilting angle of the bottom, the criterion of which is the maximum outgoing capacity of the scrapers. Then, the forward stroke of the machine is turned on, and chip-by-layer chip removal takes place over the entire bottom surface, and its thickness varies from the minimum at the treated wall to

maximum at the wall to which the working body moves. Due to the slope of the falling branch of the chain, a stepped (in plan) form of a slope is formed.

In addition, the amount of slope is slightly affected by the swing angle of the working body in the plan (trench width). The soil from the walls of the trench is lowered downwards and then scrapped on the chest and dropped into the thrower.

The use of the proposed device allows expanding the operational capabilities of the equipment and reducing the labor intensity of the stripping works in trenches.

Claims (3)

1. The working body of a chain trencher, including a frame made of beams, its swing mechanism, leading and 5 star sprockets and enveloping their cutting chain, characterized in that, in order to open trenches with different inclination angles with optimal outgoing capacity of scrapers, frame beams they are articulated with each other, two adjacent beams are made telescopic and one of them is equipped with an extension mechanism. 2. The body according to claim 1, characterized in that the sliding parts of the telescopic beams are connected by means of a lever, and the frame 5 is provided with a support leg, one end of which is hinged at the junction of the telescopic beams, and the other hinge is connected with the middle of the lever. 3. The body according to claim 1, characterized in that the extension mechanism is made in the form 0 screw pair. Sources of information taken into account in the examination 1. Author's certificate of the USSR 5 No. 400666, cl. E 02 F 5/06, 1977. 2. USSR author's certificate No. 546685, cl. E 02 F 1974 (prototype). ffcA / 7a / favy & ifffyjf 0i / f.2 / / / Phage. fff 9 13 I III F (/ g. S.