Excavating – Snow or ice removing or grooming by portable device – Railway clearer
Patent
1987-07-01
1988-10-25
Eickholt, Eugene H.
Excavating
Snow or ice removing or grooming by portable device
Railway clearer
4146958, 414687, E02F 376
Patent
active
047793643
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device for a load carrying unit, for example excavating machine buckets, wheel tractor buckets, load carrying forks for trucks and wheel tractors, and other similar units.
In existing types of load carrying units, it is often desirable to accomplish an improved maneuverability, and for example with regard to excavating machine buckets, such improved maneuverability can consist of the possibility to cause a rotary movement of the bucket in relation to the jib. Also with regard to other types of load carrying units, it is desirable to improve the freedom of movement, and for example, fork lift trucks utilized for transport of in direction upwards open containers can be mentioned, which in a simple manner may be emptied of its contents, provided that the supporting lift fork could perform a turning or rotary movement. Apart from such a turning or rotary movement, a pendulous motion in relation to the rotary plane is also obviously desired, thereby causing the material to be removed during an emptying operation to be released in a better manner.
A previously known device for accomplishing a rotary movement of an excavating machine bucket in relation to a supporting jib, and also a pendulous motion in relation to the rotary plane, is disclosed in SE, A, No. 438 882. However, this previously known device facilitates only a rather restricted rotary movement, and reduces the capacity of the bucket, and the supporting bearing used is rapidly worn down. Previous attempts made to attach a bucket to a shaft arranged with cogs, and maneuvered by means of a rack, have only resulted in deformation or breakage of the supporting shaft, caused by the forces imposed on the shaft during the work of the bucket.
The object of the present invention is to disclose a device facilitating maximum movement, both in the rotary plane and during a pendulous motion in relation to said plane. A further object is to disclose an improved supporting bearing, which can absorb the axial and transverse forces that occur, and also being arranged to facilitate adjustment for reduction of existing play, e.g. caused by wear.
The device according to the present invention is intended to belocated in an intermediate position between a load carrying unit and a supporting member for the load carrying unit, and it is arranged to impose a rotary movement for the load carrying unit in relation to the supporting member in a first plane, and preferably also a pendulation movement in a second plane extending from the first plane, and it is mainly characterised in that it includes a tubular or stud shaped member, arranged turnable or rotatable in relation to the supporting member, arranged to suspend the load carrying unit adjacent to a first end portion, and adjacent to a second end portion being joined to a preferably cylindrical and disc shaped member, having a surface directed towards the load carrying unit defining a first contact plane, the load carrying unit being arranged with a contact member, defining a second and towards the cylindrical member directed contact plane extending in a substantially parallel relationship, two groups of bearing means being arranged in an intermediate position between said first and second contact planes, one group being arranged to take up an adjustable contact position against the first contact plane, and the second group being arranged to take up an adjustable contact position against the second contact plane, and with a means being arranged to cause a preferably reversible rotary movement of the cylindrical disc shaped member, thereby rotating or turning the load carrying unit as desired in relation to the supporting member.
Examples of embodiments of a device according to the present invention, arranged at an excavating machine bucket, are more fully described below with reference to the accompanying drawings, in which:
FIG. 1 is a schematical side view of an embodiment of a device according to the invention, arranged at a jib and supporting a bucket;
FIG. 2 is a side view of the the
REFERENCES:
patent: 2718718 (1955-09-01), Bartlett
patent: 3231114 (1966-01-01), Le Tourneau
patent: 3758941 (1973-09-01), Jackson et al.
patent: 3922017 (1975-11-01), Cobb
patent: 4199033 (1980-04-01), Gundy, Jr.
patent: 4540332 (1985-09-01), Nakashima et al.
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