Mining or in situ disintegration of hard material – Hard material disintegrating machines – Floor-working
Patent
1981-02-17
1983-04-12
Purser, Ernest R.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Floor-working
299 14, 172 40, 37DIG18, E01C 2309, A01B 3500
Patent
active
043795951
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
Technical Field
This invention relates generally to a ripper and more particularly to a ripper having an impacting mechanism and means for efficiently transmitting impacting forces from the impacting mechanism to the ripper tip.
BACKGROUND ART
Impact-type rippers include an eccentric cam which functions to intermittently apply an impacting force to a ripper tip for rock ripping purposes. The eccentric cam is aligned with the ripper tip to provide an in-line application of impacting forces thereto, via an intermediate ring-like impact member and impact receiving member. This type of impact ripper is fully disclosed in U.S. Pat. No. 3,868,145, issued on Feb. 25, 1975 to Delwin E. Cobb, Et Al., and assigned to the assignee of this application.
Although impact rippers of this type function quite well, the solid supporting shank for the ripper tip exhibits an impact spring rate that is approximately eight times stiffer than the hardest rock that can be ripped. This relatively high spring rate induces high peak impact forces in the ripper mechanism which could affect the desired service life thereof. In addition, impact energy is dissipated due to the mismatch of the mechanical impedance between the impact member and the shank and between the ripper tip and rock being worked.
Furthermore, conventional impact rippers are designed for relatively shallow cutting depths, e.g., 23 cm. Any attempt to offset the ripper tip from the eccentric cam and attendant impacting mechanisms requires a substantial lengthening of the shank, having the ripper tip secured thereon. The mass of the shank is increased to thus increase internal impacting forces without any appreciable increase in the ripping forces applied to rocks by the ripper tip. Such internal impacting forces tend to produce high moments which cause increased pivot pin loads and also induce ripper tip deflections, resulting in lower cutting efficiency.
The present invention is directed to overcoming one or more of the problems as set forth above.
DISCLOSURE OF INVENTION
In one aspect of this invention, a ripper apparatus has a movable support member, a ripper tip mounted on the support member for movement along a first line, and impacting means for applying an impacting force to the support member in the direction of a second line. The improvement in the above apparatus comprises the disposition of the first and second lines in offset relationship relative to each other and spring means, between the impacting means and the ripper tip, for inducing transmission of the above impacting force from the second line to the first line directly.
In another aspect of this invention, the improvement comprises the spring means including a slot disposed transversely relative to each of the first and second lines.
In still another aspect of this invention, means are provided for inducing a matching of the mechanical impedance between the impacting means and the support member and between the ripper tip and material being worked. Such means is adapted for use with ripper apparatus wherein the above first and second lines are offset or co-incident.
The impact apparatus of this invention is highly efficient in operation and is capable of making deep cuts, e.g., 51 cm. in depth. The apparatus functions to decrease the impact spring rate which, in turn, promotes efficient energy transmission and lowers internal impacting forces to prolong the service life of the components of the ripper apparatus. The cutting portion of the support member or shank is substantially relieved of any bending moments to provide the leading edge of the shank and ripper tip with a high stiffness for efficiently fracturing rocks and the like. The ripping apparatus of this invention provides the above desiderata without increasing its complexity over conventional ripper apparatus.
BRIEF DESCRIPTION OF THE DRAWINGS
Other objects and advantages of this invention will become apparent from the following description and accompanying drawings wherein:
FIG. 1 is a partial side elevational vie
REFERENCES:
patent: 1581705 (1926-04-01), Waxbom
patent: 3437381 (1969-04-01), Bodine
patent: 3527501 (1970-09-01), Shatto, Jr.
patent: 3570609 (1971-03-01), Wise
patent: 3645021 (1972-02-01), Sonerud
patent: 3662843 (1972-05-01), Wise
patent: 3770322 (1973-11-01), Cobb et al.
patent: 3805897 (1974-04-01), Cobb et al.
patent: 3857609 (1974-12-01), Felix
patent: 3868145 (1975-02-01), Cobb et al.
patent: 3910357 (1975-10-01), Nancarrow
patent: 3922017 (1975-11-01), Cobb
patent: 4003603 (1977-01-01), Stemler et al.
patent: 4229045 (1980-10-01), Gurries
patent: 4229046 (1980-10-01), Gurries
patent: 4251111 (1981-02-01), Gurries
patent: 4252376 (1981-02-01), Gurries
Jones Steven D.
Roussin Michael A.
Woody Albert L.
Caterpillar Tractor Co.
Purser Ernest R.
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