Machine element or mechanism – Mechanical movements – Rotary to or from reciprocating or oscillating
Patent
1990-05-15
1991-11-12
Herrmann, Allan D.
Machine element or mechanism
Mechanical movements
Rotary to or from reciprocating or oscillating
F16H 1906
Patent
active
050637924
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to a continuous motion converter for converting rotary motion to reciprocatory motion and/or reciprocatory motion to rotary motion.
Known means for effecting conversion of rotary motion to reciprocatory motion have utilised an endless flexible drive member such as a chain around a pair of spaced wheels where the chain supports a carrier which will move with the movement of the chain over the wheels. In most cases the carrier is supported to one side of the chain in order that it does not interfere with the support shafts of the wheels. Where the carrier is supported from both sides of the chain provision must be made to provide support at the side of the wheels to which the shafts are mounted when the position of the carrier fixed to the chain is in alignment with the shafts. This arrangement however, has also been found to be unsatisfactory since the other side of the carrier is not so supported and eccentric loadings are induced on the chain carrier and wheel.
SUMMARY OF THE INVENTION
In one form the invention resides in a continuous rotary to reciprocatory or reciprocatory to rotary motion converter comprising a pair of wheels in spaced co-planar relationship to each other having an endless flexible drive member received over them, a carrier located to both sides of the drive member, said drive member supporting at one location thereon a slider which extends to each side of the drive member, said slider being slidably received to the drive member carrier for transverse movement relative to the axis between said wheels whereby with movement of the drive member on rotation of said wheels, said carrier reciprocates between said wheels and said slider reciprocates transversely on the carrier, support means being provided to support slider at both sides of the drive member from the carrier continuously throughout the movement of the carrier.
According to a preferred feature of the invention the slider is engagable with the carrier to each side of the drive member through at least one roller rotatably supported from the slider and received in the carrier for said transverse movement.
The invention will be more fully understood in the light of the following description of several specific embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic representation of a rotary to reciprocatory motion converter according to the first embodiment;
FIG. 2 is a side elevation of the second embodiment;
FIG. 3 is a cross-section of the second embodiment;
FIG. 4A through 4D are a series of part sectional elevations of the carrier of the second embodiment illustrating the movement of the slider blocks;
FIGS. 5 through 8 depict a mounting shaft structure in accordance with the second embodiment of the invention; wherein like numerals represent like features of the invention:
FIG. 5 is a plan of one form of shaft mounting of the driven wheel of the second embodiment;
FIG. 6 is a sectional view along line 6--6 of FIG. 5; and
FIG. 7 is a sectional view along line 7--7 of FIG. 6;
FIG. 8 is a sectional view along line 8--8 of FIG. 6.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The first embodiment as shown at FIG. 1 comprises a pair of wheels 11 and 12 wherein one wheel 11 is driven from a rotary power source through a drive shaft 13 and the other wheel is freely rotatable on an idler shaft. Both wheels 11 and 12 are substantially co-planar and are interconnected by an endless flexible drive member 14 which is engaged with both wheels 11 and 12. The wheels 11 and 12 are associated with a housing body (not shown in FIG. 1) having a central axis which is substantially parallel with the perpendicular axis interconnecting the axes of rotation of the wheels 11 and 12. The housing body slidably supports a carrier 15 which extends transversely with respect to the central axis of the housing body and extends to both sides of the flexible drive member 14 to provide two parallel transversely extending side portions 15a and 15b. The opposed faces of the side porti
REFERENCES:
patent: 1848530 (1932-03-01), Hunter
patent: 1890781 (1932-12-01), Hall et al.
patent: 2564816 (1951-08-01), Rehwald
patent: 2593470 (1952-04-01), Matthews et al.
patent: 4084681 (1978-04-01), Heinzl et al.
Dartnall William J.
Langridge David
Dartnall Engineering & Innovation Pty Ltd.
Herrmann Allan D.
Laub David W.
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