FI74098C - The attachment bracket for excavator and ground transport machines - Google Patents

Description

74098

EXCAVATOR ATTACHMENT FOR EXCAVATORS AND EARTHMOVERS

The present invention relates to an attachment device for excavators and earthmoving implements, with which various implements can be attached to the machine.

In general, the implement is fixed to the lifting arms of the implement by means of mounted pivot pins. In order to achieve a more versatile use of work machines, work tools suitable for various work events have been developed for them, whereby it has become necessary to change the work equipment quickly and safely.

A number of so-called quick couplings in which a separate spacer is mounted on the original attachment points of the lifting arms of the implement and the implement is attached to this spacer by various hooks, mechanical or hydraulic pins or wedge-shaped structures.

The disadvantage of the known devices has been that the connection of the implement to the spacer 20 is not always sufficiently tight, and thus they could not be applied to heavy earthmoving machines because the clearance consumes the connection points broken. The spacer of the fastening devices of the known tools is subjected to all work stresses, so they must be: strong enough and thus heavy. In addition, due to the structure of the spacer, the implement moves out of the machine. The weight of the spacer and the increased distance of the implement from the machine cause a decrease in the working capacity of the implement or an increase in the loads on the machine, as well as a change in the range of movement of the implement. In some work machines, the displacement of the implement causes such considerable changes in the range of movement of the implement that currently known fastening devices with a spacer cannot be used.

The tool attachment device according to the invention provides a decisive improvement in the above points. To achieve this, the fastening device according to the invention is characterized by what is stated in the characterizing part of claim 1.

'74098 2

The most important advantage of the invention is that the tool can be fastened from the fastening points in the original position of the work machine, i.e. the articulation pins, whereby the range of movement of the tool does not change.

40 The working load is applied directly from the articulated pins of the implement to the lugs of the implement, sometimes there is no need for a load-bearing heavy spacer, which in digging and loading machines reduces the lifting capacity.

45 The invention will now be described in detail with reference to the accompanying drawings, in which Figure 1 shows a machine lifting arm and a detachable tool with lugs 50 Figure 2 shows the setting of a tool on machine lifting arms Figure 3 shows annular brushes and edging nuts for tool lugs according to the invention 55

The drawings show a lightweight intermediate piece (3) as part of the invention mounted between the lifting lever (1) of the implement and the implement operating lever (2), which keeps the extended threaded pivots (4) at the correct distance from each other, whereby the pivots (4) can fit into the open slots (7) of the lugs (6) of the tool (5). The open slots have annular brushes (8) according to the invention. When the articulated pins are placed in the open slots (7), the extensions of the articulated pins rest on the bottoms of the open slots and the threaded nuts (9) according to the invention can be screwed into the threads at the ends of the articulated pins (4). The working stresses are transferred from the articulated pins (4) of the implement directly to the tool lugs (6), so the intermediate piece (3) is not subjected to working stresses and can be light in construction. According to the invention, when the annular brushes (8) of the open slots (7) and the edges (10) of the edge nuts (9) are conical, the joints can be tightened. Later trace tightening is also possible. The function of the extended articulated pins (4) and the cylindrical parts (11) of the edge nuts included in the invention is to receive the loading forces which pull the articulated pins out of the tool 1: 3 74098 and move the annular ridges through.

When uncoupling, the implement is placed in the desired storage location, and when the edge nut is opened, the implement lifting lever (1) can be pulled out of the implement. The implement remains in the desired position, and another implement can be placed on the implement using the same edge nuts.

The invention is not limited to the described embodiment, but many other modifications are possible according to the inventive idea defined by the claims.

Claims (2)

74098 85 Claims Tool attachment device for excavators and earthmoving machines, with which various tools can be connected to the machine, characterized in that the elongated threaded pins (4) mounted on the machine immediately fit into the open grooves (7) of the tool, with annular ridges (8) (9) the machine pivot pins (4) are locked, and the pivot pins (4) are held at a desired distance from each other by a light spacer (3) to which the pivot pins (4) are locked against rotation by a pin, pin or screw (12) 95 and that the spacer (3) between the lifting part (1) of the implement and the lugs (6) of the implement. Fastening device according to Claim 1, characterized in that the annular brushes (8) of the tool lugs (6) and the edges (10) of the nuts (9) of the rim 100 are conical and that the nuts (9) have a cylindrical part (11) which rests on a pivot pin. . li