Mining or in situ disintegration of hard material – Hard material disintegrating machines – Floor-working
Patent
1982-09-27
1984-06-12
Purser, Ernest R.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Floor-working
172 40, 37DIG18, E01C 2309, A01B 3500
Patent
active
044537727
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
TECHNICAL FIELD
This invention relates to ground engaging tools, and, more particularly, to modular design of components which together comprise an impact ripper assembly.
BACKGROUND ART
In one form of conventional earth ripper, a ripper tip is mounted to a shank which is pivotally mounted to a tractor beam by a shank pivot pin. As a result of side loadings acting on the ripper during the ripping operation, the shank pivot pins have worn so that the pins, at times, were lost during the ripping operation, causing shutdown of the tractor and ripper for repair. In U.S. Pat. No. 4,229,044 by Cobb and Livesay an improved ripper-impact imparting mechanism and mounting therefor is shown wherein the reciprocatable ripper is pivotally supported with a portion of the force imparter so as to share a common connection. Such apparatus, while performing admirably, does not easily permit servicing of only one of the ripper or impacting mechanism components. Moreover, the load exerted by the ripper on the shank pivot pin cantilevers the load exerted on the clevis pin and thus subjects it to high loads.
A nonswiveling impactor-ripper assembly is illustrated in U.S. Pat. No. 4,003,603 in which the ripper shank and impact apparatus again share a support so as to make separate disassembly and service thereof difficult. U.S. Pat. No. 3,770,322 by Cobb et al illustrates a nonswiveling impactor-ripper apparatus having multiple pivot points for the ripper element.
DISCLOSURE OF THE INVENTION
The present invention includes a mounting structure which may be joined to a draft device so as to swivel about a vertical axis, a ripper element which is connected about a horizontal axis to the mounting structure, and an impact apparatus which is removably joined to the mounting structure at locations remote from the ripper element-mounting structure connection.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a partially cutaway side elevation view of a draft hitch supporting the impact ripper assembly;
FIG. 2 is an enlarged, isometric view of the ripper assembly illustrated in FIG. 1;
FIG. 3 is a partially exploded view of FIG. 2; and
FIG. 4 is a partially exploded view of FIG. 2.
BEST MODE FOR CARRYING OUT THE INVENTION
In the illustrated embodiment of the invention as disclosed in FIGS. 1 and 2 an impact ripper assembly 12 is mounted on a draft device or hitch 10 which is attached to and drawn by a tractor for example. The hitch 10 includes a pair of draft arms 11 on the near and far side (the near one has been partially removed for the sake of clarity) of the mounting structure 14 as viewed in FIG. 1. Portions of the hitch 10 are shown in FIG. 1 as partially sectioned and joined to the mounting structure 14 and in FIG. 4 as phantom projections. The ripper assembly 12 includes a mounting structure 14 which is joined to the draft hitch 10, a ripper element 16 which is pivotally mounted on the mounting structure 14, and an impactor apparatus 18 which delivers intermittent blows to the ripper element 16 to facilitate penetration of the earth. To provide perspective for the description which follows the mounting structure 14 and impactor apparatus 18 are respectively disposed near the forward end and the rearward end of the impact ripper assembly 12 as it appears in FIG. 1.
The mounting structure 14 (as best seen in FIG. 4) includes at the forward end thereof an upper flange 20 and a lower flange 22 which are connected by a pair of transversely spaced side plates 23. The flanges 20 and 22 have aligned upper and lower openings 24 and 26, respectively, so as to permit swiveling about a vertical swivel axis 28 when an upper swivel pin 30 and a lower swivel pin 32 are received therein to interconnect the mounting structure 14 and the draft hitch 10.
The ripper element 16 includes a ripper tip 34 which engages the earth and fractures same and a ripper shank 36 which extends upwardly from the ripper tip 34 and is pivotally mounted about a horizontal pivot axis 38 to the mounting structure side plates 23 by a pivot pin 40. T
REFERENCES:
patent: 3386517 (1968-06-01), Kelley
patent: 3770322 (1973-11-01), Cobb et al.
patent: 3857609 (1974-12-01), Felix
patent: 3897975 (1975-08-01), Cobb et al.
patent: 4003603 (1977-01-01), Stemler et al.
patent: 4229044 (1980-10-01), Cobb et al.
patent: 4229045 (1980-10-01), Gurries
Caterpillar Tractor Co.
Keen Joseph W.
Purser Ernest R.
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