SU1666662A1 - Small excavator - Google Patents

Abstract

This invention relates to single-bucket mini-excavators. The goal is to enhance operational capabilities by improving stability and reliability. The mini excavator is mounted on a single axle pneumatic chassis. The mechanism for fixing the position of the undercarriage relative to the frame 2 consists of a toothed rack 18 and an insert 20 with a swivel cam. The rail 18 is pivotally connected to the axle 11, and the liner 20 is connected to the frame 2. The hinged joints have elastic pads 22. Rollers 24 can be located on the rail inside the liner 20. Before starting, the position of the excavator is adjusted using outriggers and boom equipment so that both wheels touched the surface of the working platform. After the installation of the excavator, the eccentrics 21 are rotated and the rails 18 and the axis 11 are fixed relative to the frame 2. 2 Cpf-ly, 4 ill.

Description

The invention relates to earthmoving machines, and more specifically to single-bucket mini-excavators.

The goal is to enhance operational capabilities by improving stability and reliability.

Figure 1 shows a mini excavator, side view; figure 2 is a view along arrow A in figure 1; fig.Z - node I in figure 2; figure 4 is a view along arrow B in fig.Z.

The mini excavator consists of a single axle pneumatic chassis 1, frame 2 with drawbar 3, hydraulic pump station 4, control console 5, outboard supports

6, boom equipment 7. rotary column 8, working body 9 and mechanisms 10 for fixing the lateral position of the undercarriage.

The undercarriage 1 consists of an axle 11, two wheels 12, damping elements 13 and dampers 14. The outriggers 6 consist of pivoting levers 15, soil-hooks 16 and hydraulic jacks 17.

The mechanism 10 for fixing the lateral position of the chassis 1 relative to the frame 2 consists of a rail 18 with teeth 19 and an insert 20 with a rotary eccentric

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21. The rail 18 passes through the hole of the liner 20, while the rail is pivotally attached to the axis 11, and the liners 20 to the frame 2. The hinged connections of the rail 18 with the axis 11 of the undercarriage and the liner 20 with the frame 2 are made by elastic pads 22. 23, the rotary eccentric 21 has the ability to interact with the teeth 19 of the rail 18, on which the rollers 24 can be mounted, interacting with the opening of the liner 20.

The device works as follows. When performing earthworks, for example, a fragment of a trench on a slope, the base platform (frame) of the mini excavator should be kept horizontal both during the passage and when moving it along the slope. After installing the excavator at the work site, taking into account the direction of its movement, the outboard supports 6 and the boom equipment 7 adjust the position of the frame 2 so that both wheels 12 touch the ground of the working platform.

After that, a rigid connection is established between the axis 11 of the undercarriage device 1 and the frame 2. To do this, the eccentrics 21 are rotated, which by their working profiles 23 interact with the teeth 19 of the rails 18, whose position relative to the liners 20 was determined during the position correction process the frames 2 about the axis 11. The guide rollers 24 mounted on the laths 18 and the elastic gaskets 22 facilitate the self-alignment of the rails relative to the liners 20.

The operation carried out in this way allows the mini excavator to move freely along a slope with a slope higher than allowed and to perform earth works. When transporting the mini excavator, the eccentrics 21 are turned to a position that excludes the interaction of their working profiles 23 with the teeth 19 of the rails 18.

Claims (3)

1. Mini excavator, including a single axle pneumatic chassis mounted on a frame with a tongue and mounted on it a pump station, control panel, outriggers and boom equipment on a rotary column with a working body, characterized in that, in order to expand operational capabilities by improving stability and reliability in operation, it is equipped with a mechanism for fixing the undercarriage relative to the frame, made of guide pads hinged on the frame and from notched racks, When this eccentric rotary liners have working surfaces which are arranged to cooperate with the working surfaces of the slats, the ends of which are pivotally connected to the chassis axis. 2. The mini excavator according to claim 1, wherein the gear racks are provided with guide rollers. 3. The mini excavator according to claim 1, wherein the articulated joints of the liners with the frame and the toothed racks with the axles have elastic pads. Qluzf  FIG. Z. 20 22 2 22I Fig.Z Fig