Material or article handling – Vertically swinging load support – Shovel or fork type
Patent
1984-01-25
1986-02-18
Wayner, William E.
Material or article handling
Vertically swinging load support
Shovel or fork type
4146955, 414723, 371175, B66C 2300, E02F 376
Patent
active
045711461
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATION(S)
This U.S. application stems from PCT International Application No. PCT/SE83/00224 filed June 3, 1983.
BACKGROUND OF THE INVENTION
The present invention refers to a digging apparatus applicable to a bucket loader, e.g. a tractor loader and of the type used for smaller digging work, such as trenching and e.g. in agriculture, park management or the like.
Such an apparatus must be so easy to mount on the loader that mounting and dismounting can be accomplished in short time and by a single machine operator. The apparatus should furthermore be light and flexible at the same time as it has great working range and mobility. It is of course also desirable that the apparatus is inexpensive and wear resistant.
Older apparatuses of this kind have commonly fulfilled only one or some of these requirements, whereas all requirements have to be fulfilled for making an apparatus, which is useful under intended conditions, which does not occupy the loader for unnecessary long time, and which is simultaneously flexible, robust and inexpensive.
Apparatuses of this type have lately been disigned, which incorporate a connecting device intended to be attached to said bucket loader and with a pivot axle connected thereto and extending mainly perpendicularly to the extension of the digging beam, which is pivotably supported about the pivot axle and has an overhead stay bar and a bucket attached to the free end thereof, which bucket is operable via a driving device, and having at least one hydraulic piston adapted to bring about the swinging of the digging beam about the pivot axle and arranged to transfer pivot force to the digging beam at a short distance from the pivot axle, and these apparatuses have fulfilled several of the above requirements.
A drawback with these known devices is that they have very rigid and unflexible digging beams and it is therefore commonly possible to apply them at one type of loader only, at the same time as the digging beam in practise lacks ability of adaption to different digging conditions and positions.
THE PURPOSE AND MOST ESSENTIAL FEATURES OF THE INVENTION
The purpose of the invention is now to provide a digging apparatus having high flexibility and therefore being applicable to different loaders and which fulfills all above defined requirements and this has been achieved thereby that the apparatus has been given the features appearing in the accompanying claim 1.
DESCRIPTION OF THE DRAWINGS
The invention will hereinafter be further described with reference to embodiments shown in the accompanying drawings.
FIG. 1 shows in a schematic side elevation a tractor loader with a digging apparatus according to the invention fitted thereto and shown in a forward extending position.
FIG. 2 is an enlarged side view of a detail of the connection between the loader arm of the bucket loader and the digging apparatus according to the invention.
FIG. 3 shows the separate digging apparatus according to the invention in a side view.
FIG. 4 shows in bigger scale a preferred embodiment of the rear portion of the digging apparatus according to the invention in a view from one side thereof.
FIG. 5 is a view from above of the portion av the digging apparatus shown in FIG. 4, and
FIG. 6 shows the digging apparatus according to the invention in separate position.
DESCRIPTION OF PREFERRED EMBODIMENTS
In FIG. 1 is schematically shown a tractor loader 1 with a loader arm 2, which at its outer end is provided with connecting members 3 for interconnection with quick coupling brackets 4 attached to one end of a digging apparatus 5 according to the invention. It should be noted that the tractor loader can be substituted for every other suitable bucket loader provided with a corresponding, arbitrarily positioned loader arm.
The digging apparatus 5 is thus connected to the bucket loader in question via an easily operable quick coupling of known type, which has however been supplemented with stabilizing shoulders, shown at 6 in FIG. 2, and with other reinforcing means of p
REFERENCES:
patent: 3732996 (1973-05-01), Bauer
patent: 3802586 (1974-04-01), Lofgreen
patent: 4264265 (1981-04-01), Stoychoff
patent: 4274213 (1981-06-01), Yadlowsky
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