Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Locking means
Patent
1981-03-16
1984-01-31
Dorner, Kenneth J.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Locking means
414694, 37118R, 403408, B23Q 1700, E02F 314
Patent
active
044282559
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates generally to a locking assembly and more particularly to a lock pin assembly for locking an indexable apparatus to a supporting structure while protecting the cylinder and rod from damaging forces and preventing rotation of the apparatus with respect to the supporting structure.
BACKGROUND ART
Earthworking apparatus, such as rockbreakers, trenchers, and impact rippers, are used to fracture and rip rock and dig trenches in the earth. Such apparatus is generally mounted upon an earthmoving machine which provide mobility for the apparatus. The mounting generally provides for rotation of the apparatus to various angular positions relative to the machine.
After the earthworking apparatus has been rotated to a desired working position, it must be securely locked at that position.
During the work function, the entire earthworking apparatus is subjected to extremely high forces and rapid cycling of the loads. These forces can be transferred into the locking assembly and into the means which moves the locking assembly in and out of locking position. Such impact loading can cause distortion, bending, and damage to the locking assembly and the moving means.
One type of mechanism for locking a swingable support member to a frame member is disclosed in U.S. Pat. No. 3,692,149, issued to John H. Evans on Sept. 19, 1972. In this patent, a locking pin is selectively entered into one of several openings by a double acting hydraulic jack. The locking pin is rigidly secured to the rod of the hydraulic jack, as by welding. Therefore, when high side loads are applied to the locking pin by the swingable support member or the frame member, such loads are undesirably transferred into the rod of the hydraulic jack. These loads can cause distortion and bending of the rod and damage to the seals of the hydraulic jack. In severe case, the jack itself can be damaged.
The present invention is directed to overcoming one or more of the problems as set forth above.
DISCLOSURE OF THE INVENTION
In one aspect of the present invention, a locking assembly securely locks a movable member to a support member and prevents rotation of the movable member. The locking assembly is actuated from a locked and unlocked position by a moving means. The locking assembly is of a construction sufficient for isolating the moving means from bending loads applied on the pin assembly.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a diagrammatic side elevational view of an embodiment of the present invention illustrated in connection with a material fracturing apparatus mounted on a mobile earthmoving machine;
FIG. 2 is a diagrammatic side elevational view of the subject invention on an enlarged scale, with some parts in section;
FIG. 3 is a diagrammatic sectional view of the lock pin assembly of the present invention taken generally along lines III--III of FIG. 2;
FIG. 4 is a diagrammatic sectional view taken generally along lines IV--IV of FIG. 1; and
FIG. 5 is a diagrammatic sectional view similar to FIG. 4, with portions of the apparatus rotated to a different position.
BEST MODE FOR CARRYING OUT THE INVENTION
Referring to FIG. 1, a material fracturing apparatus 10, is mounted on an earthworking machine 12 by means of an arm 14 and a boom 16. The arm 14 and boom 16 are moved by fluid cylinders 18 and 20 respectively. In addition to manipulations of the arm 14 and boom 16, the apparatus 10 is further positionable by a fluid cylinder 22 which is connected to the arm 14 by a link 24 and to the apparatus 10 by a link 26.
The fracturing apparatus 10 is suitably mounted for limited indexable rotation about an axis 28. The apparatus 10 includes an energy source, such as fluid motor 30 and associated flywheels (not shown), for activating an earthworking tool or ripper tip 32.
The material fracturing apparatus 10 has a first member or structure 34 which supports a second member or case 36 for limited rotation, as previously noted. The links 24 and 26 are attached to the support structure 34 by pivot pin 38 and 40. The
REFERENCES:
patent: 1923440 (1933-08-01), Hunt et al.
patent: 3118347 (1964-01-01), Thompson
patent: 3450213 (1969-06-01), Creighton et al.
patent: 3540312 (1970-11-01), Russ
patent: 3692149 (1972-09-01), Evans
patent: 3972378 (1976-08-01), Houriez et al.
patent: 4042131 (1977-08-01), Buttke
patent: 4132290 (1979-01-01), Dezelan et al.
Caterpillar Tractor Co.
Dorner Kenneth J.
White Claude F.
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