Rotary expansible chamber devices – Working member has planetary or planetating movement – Plural working members or chambers
Patent
1982-02-23
1984-05-29
Vrablik, John J.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Plural working members or chambers
418186, F03C 200
Patent
active
044512163
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to hydraulic positive displacement devices, and more particularly to planetary hydraulic motors.
Background of the Invention
There is known a planetary hydraulic motor (cf. USSR Inventor's Certificate No. 595,536; IPC F04C 1/00; published in the Bulletin "Discoveries, Inventions, Industrial Designs and Trademarks" No. 8, 1978)--in Russian comprising a stator gear having eccentrically arranged therein a rotor connected by means of a universal joint with an output shaft. Attached to the stator gear are two cover plates: one for mounting the planetary hydraulic motor and one for feeding a working fluid.
The use of the universal joint for converting compound motions of the rotor into rotation of the output shaft reduces the reliability and increases the dimensions of the above planetary hydraulic motor.
Another planetary hydraulic motor is known bearing closest resemblance to the one to described in this specification (cf. USSR Inventor's Certificate No. 389,288; IPC F04C 1/00; published in the Bulletin "Discoveries, Inventions, Industrial Designs and Trademarks", No. 29, 1973, p. 130--in Russian). This motor comprises a stator gear having interior teeth. Inside the stator gear is mounted eccentrically a ring rotor having exterior teeth; the motor also has cover plates adjoining end faces of the ring rotor and the stator gear.
This planetary hydraulic motor also employs a universal joint for transmitting the motions of the rotor to the shaft of a working implement. Such a transmission of the orbiting motions of the ring rotor to the shaft of the working implement by means of the universal joint is likewise disadvantageous in that the motor becomes complicated and oversized. It also is not reliable or durable enough.
SUMMARY OF THE INVENTION
The invention is directed toward the provision of a planetary hydraulic motor having a much simplified means for converting a compound cooperation of a rotor and stator gear into a concentric rotational motion of a shaft of a working implement by directly connecting the rotor with such a shaft.
The invention provides for reducing the overall dimensions and weight of the rotary hydraulic motor, as well as makes it structurally simpler, improves its reliability and extends its life.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in greater detail with reference to specific embodiments thereof taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a longitudinal sectional view of a planetary hydraulic motor according to the invention; and
FIG. 2 is a side view of the planetary hydraulic motor according to the invention with a cover plate removed.
BEST MODE OF CARRYING OUT THE INVENTION
A planetary hydraulic motor comprises a stator gear 1 (FIG. 1) having interior teeth 2. Mounted eccentrically inside the stator gear 1 is a rotor 3 having exterior teeth 4 (FIG. 2). Also provided are cover plates 5 and 6 (FIG. 1) adjacent to end faces of the rotor 3 and those of the stator gear 1. Fixedly secured to the stator gear 1 is one end of an arm 7, the other end of which is connected by means of a hinged joint 8 (FIG. 2) to a housing 9 of an actuating mechanism (not shown). The rotor 3 (FIG. 1) is mounted directly on a drive shaft 10 of the actuating mechanism. The cover plates 5 and 6 are provided with passageways 11 and 12 for feeding and discharging a working fluid, annular chambers 13 and 14, and axial passages 15 and 16. The rotor 3 also has axial passages 17 and 18 communicating with its interteeth space. The interteeth space of the rotor 3 and the stator gear 1 define working chambers 19 (FIG. 2) of variable volume.
The planetary hydraulic motor operates in the following manner.
The working fluid fed through the passageway 11 (FIG. 1) into the chambers 13 enters via the axial passages 18 of the rotor 3 one half of the working chambers 19 (FIG. 2) on the one side of the symmetry plane AA. Under the action of the pressure of the working fluid in these chambers, the stator gear 1 is c
REFERENCES:
patent: 3910732 (1975-10-01), Lusztig
Chumachenko Boris A.
Erasov Fedor N.
Potaichuk Vladimir M.
Vrablik John J.
Zaporozhsky Konstruktorsko-Tekhnologichesky Institut Selskokhozy
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