Tool driving or impacting – Impacting devices – With means to cause or control advance of hammer head
Patent
1986-09-17
1988-03-22
Staab, Lawrence
Tool driving or impacting
Impacting devices
With means to cause or control advance of hammer head
173124, F16H 3300, B25D 100
Patent
active
047322209
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an apparatus for briefly storing and impulsively releasing mechanical energy. Such apparatus can find application and use in many fields within the technique, for example in connection with various percussion tools and apparatus, punches and presses, rock-drilling machines, compressors and high-pressure pumps, and the like.
More specifically, the invention can be said to relate to an apparatus for stepping-up the mechanical power output of machines. In this respect, energy is stored by means of an arrangement having a comparatively low power output over a relatively long period of time, and is thereafter released impulsively over a very short period of time at a high power output, whereby it can be said that the power input has been stepped-up.
More particularly, according to one aspect of the invention there is provided an apparatus for briefly storing and impulsively releasing mechanical energy with the use of a stepwise or continuously rotating member arranged to coact with a power-delivering device, e.g. a piston, which when moving in one direction causes energy to be stored in an energy-absorbing means, e.g. a spring, gas or liquid, which energy, subsequent to said member passing a limit position, is delivered to said device, so as to produce an accelerated movement in the opposite direction.
BACKGROUND ART
Various apparatuses of this kind are known to the art. Reference can be made in this respect, by way of example, to various types of known cam and link-drive mechanisms, such as those of the kind described in Artobolevsky: MMED, Volume IV, No.: 3011, 3014, 3015 and 3016. These principle cam and link mechanisms can be used to produce normally complicated movement sequences, which also include the release of percussion forces at given times in the movement sequence.
U.S. Pat. No. 740,816 (Daily) describes an apparatus comprising a circular rotatable disk formed with a cut-away portion designed as a semiheartshaped cam. Along said cam moves a small roller which is coupled to a spring adapted to store energy. Compression of the spring commences at the point at the biggest distance from the disk's center and is released--however not instantaneously--at a point nearest the center.
Other types of apparatuses having outer cams are described in U.S. Pat. Nos. 870,653 (Warsop) and 1,137,272 (Moyle).
None of these known mechanisms, however, can be used successfully in a machine of the aforesaid kind, since among other things the wear on mutually co-acting components subjected to load would quickly render the mechanism unusable. Neither are these mechanisms capable of effectively stepping-up the power output of a machine, and hence are not competitive in relation to other types of mechanisms available on the market.
Also known to the art is a high-speed cutting or shearing machine which uses a compressible spring in co-action with a release coupling which comprises a number of balls housed in a sleeve and arranged to lock a hammer in a retracted position. The hammer is released by lifting the sleeve, so that the balls are able to move out of locking engagement.
When the movements of such high-speed cutting or shearing machines are to be coordinated with the feed of the workpieces to be worked, production is restricted thereby to a maximum of 350 strokes per minute. Present day demands, however, require a marked increase in the working rate of such machines, and in the case of an eccentric press for example require a working speed which is at least twice that of the aforementioned, e.g. a working speed of 750-1000 strokes per minute, or still higher.
OBJECT OF THE INVENTION
One object of the invention is to provide an arrangement of the aforementioned kind which, despite the simplicity of design and the robust construction of said arrangement, provides a much faster working rate than known mechanisms.
Another object of the invention is to guide the power-delivering device effectively with a minimum of frictional losses when utilizing an arrangement of the
REFERENCES:
patent: 458184 (1891-08-01), Morgan
patent: 864838 (1907-09-01), Fowden
patent: 1162636 (1915-11-01), Miller
patent: 1267174 (1918-05-01), Bert
patent: 1381745 (1921-06-01), Robb
patent: 1464824 (1923-08-01), Kollock et al.
patent: 2201023 (1940-05-01), Brown
patent: 2298792 (1942-10-01), Hicks
patent: 2772858 (1956-12-01), Galvez
patent: 2825207 (1958-03-01), Cullum
patent: 3587754 (1971-06-01), Laatsch
patent: 3747691 (1973-07-01), Lundman et al.
patent: 4421180 (1983-12-01), Fleishman et al.
Marcus Komponenter AB
Staab Lawrence
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