FI87821B - Boom system of machine - Google Patents

Description

1 87821

Implement boom

The invention relates to a working machine boom comprising a pivotally mounted stand, a support post articulated to the lower end of the stand, a boom articulated to one end of the support post to which one working device is attached, a stand with a boom at one end and a boom articulated to move the vertical plane.

The work equipment attached to the booms of the work machines performs various work tasks and the structure of the booms depends on the work task of the work machine. In general, implement booms should extend as far away from the implement as possible and should also be able to work in the immediate vicinity of the implement. In addition, the booms of the implements must be easily changeable from one position to another. The current equipment is somewhat difficult to access and has a hard time working — 20 square feet right next to the implement. Such implement booms are described, for example, in U.S. Pat. No. 3,204,792 and DE-A-24 14 0666.

U.S. Pat. No. 3,204,792 discloses a boom in which the support column is articulated at its lower end to a carriage 25 which is movable by a horizontal cylinder in a longitudinal carriage body of a vehicle having a boom lifting cylinder articulated at its lower end. and moving the carriage when moving the boom is essential.The maximum dimension of the carriage is achieved with the carriage ·.; 30 in its forward position and the lifting cylinder in its longest position.The traction of the log is brought closer by • · movement of the carriage, which in turn requires moving the carriage to its position. .

; 1 ·· Simultaneous operation of both the carriage and both tilt cylinders and • · • · »2 P.7 821 lifting cylinder is required to move the boom to its extreme position and back.

DE-A-24 14 066 discloses a borehole arranged on a swivel base, in which a single support column and a boom are tilted by one tilting cylinder.

The object of the invention is to provide a work machine boom which eliminates the drawbacks associated with existing booms. It is a further object of the invention to provide a far-reaching boom which can also be operated next to the working machine and which is easily accessible and adjustable from one position to another.

The object of the invention is achieved by a machine boom, which is mainly characterized in that the stand is fixed to the machine in a manner known per se so as to be tilted longitudinally, and that the support post is articulated at one end to one edge -the end of the boom at a distance from the support column in the direction of the end of the working platform of the boom 20 so as to form an articulation angle ABCD with side CD as support column and side AB as lifting cylinder, the articulation being dimensioned ', so that ·· '25 with the tilting cylinder alone in the rear working position close to the implement without the need to use a lifting cylinder.

According to the invention, the boom base is fixed to the working machine in a plane parallel to its longitudinal axis so as to be tiltable. In this case, the working device attached to the implement can be used to work close to the implement and the boom can be easily adjusted to the desired position.

The invention will now be described in more detail with reference to the accompanying drawing, in which Figure 1 shows a side view of an embodiment of a machine boom according to the invention and Figure 2 shows a side view of a stand of a machine machine boom according to the invention.

In the apparatus according to Figure 1, the boom-5 of the working machine comprises a stand 2 attached to the working machine 1, a support post 3 articulated to the stand and a boom 4 articulated to the support post, to one end of which a working device is attached. The base is formed by a turntable 7 and a support base 8 to which the turntable is attached to the turntable. In this application, the turntable includes a toothed turntable and the turntable is rotated relative to the support base by a hydraulic motor-planetary gear. The support base is attached to the implement in a plane parallel to its longitudinal axis on a pivot axis 10 to be tilted. The apparatus 15 further comprises a lifting device 9, in this application a cylinder, fixed to the frame of the working machine and to the support base, for furnishing the support base and the base. In this application, the stand is tilted about ± 20® with respect to the plane of the implement body, but in other applications the tilt angle can be varied as appropriate. The stand has an opening formed in its center, so the stand is open in the middle and below. As shown in Figure 2, the hoses and wires required by the boom are routed from the center of the stand to the swivel base of the stand and from there to the other parts of the system.

• · ·: V A support column and devices for controlling the movement of the boom are articulated to the swivel base at a distance, incl.:::: Roll-up cylinder 5 and lifting cylinder 6. The support column is nailed to one side of the swivel base and in this application 30 the cylinders are articulated to one end of the turntable, • · mainly equidistant from the support post.

• · ·

The other end of the tilt cylinder is articulated in the vicinity of the boom side end of the support column. The other end of the lifting cylinder is articulated to the boom at a distance:. At a distance of 35 87821 from the support column in the direction of the head of the boom working device. The movements of the boom in the vertical plane are effected by articulation angles ABCD, where side CD is the support column and AB is the lifting cylinder. By articulating the support column from point D and supporting it with a separate tipping cylinder, the following 5 advantages are achieved: the length of the column can be used and, if desired, the maximum reach. The boom can be made relatively short and light, and when pulled into the rear position, the boom head close to the implement makes the center of gravity affordable.

10 The articulation is dimensioned so that the boom can only be moved by moving the tilt cylinder, so that there is no need to move the lifting cylinder. In this case, only the boom is moved as desired and the tilting cylinder is moved from the support column to the desired position. Thus, the boom and the working device attached to it can be effectively moved from one position to another.

The invention is not limited to the applications shown but may vary within the scope of the claims.

• · I

• · ··· • • · • »* * · · • * * •» • • • · * * · · · · * * * • * * · * * · • ♦ • · ψ • · · • · · · · I • »· m • · * · • ·« • · · ·· · ··· · • · • ·

Claims (3)

5 87821 A work machine boom comprising a pivotally mounted stand (2), a support post (3) hinged to the base (2) at its lower end, a boom (4) articulated at one end of the support post to which a working device is attached, a base (2) at one end and a support column tilting cylinder (5) and a lifting cylinder (6) articulated at one end of the support column (3) for moving the boom in a vertical plane, characterized in that the base (2) is attached to the implement in a manner known per se for tilting it longitudinally. (3) is articulated at its lower end to one edge of the pedestal (2) and the lifting cylinder (6) of the boom (4) is articulated at its lower end to the other edge of said pedestal at a distance from the support post (3) and at its upper end into the boom (4) in the direction of the head so as to form an articulation angle ABCD in which the side CD is tu the tine column (3) and side AB is a lifting-20 cylinder (6), the articulation being dimensioned so that the boom (4) and the implement can be moved between the forward working position giving the maximum reach and the rear working position close to the implement. • · · with this tilt cylinder (5) without having to use a nos-25 master cylinder (6). Boom according to Claim 1, characterized in that the tilt cylinder (5) is articulated to the same edge of the stand as the lifting cylinder (6). Boom according to Claim 1 or 2, characterized in that the base comprises a pivot base (7) to which a support column, a tilting cylinder and a lifting cylinder are attached, a support base (8) arranged between the pivot base and the implement body, to which the turntable is «pivotally attached, and to the implement and the support:. 35 fixed lifting device (9) for furnishing the stand with the • • · ·. ···. respect. «· ·· # 6 37821