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EP0544209A1 - Réduction et extension de cannelure pour un élément auxiliaire d'entraînement - Google Patents

Réduction et extension de cannelure pour un élément auxiliaire d'entraînement Download PDF

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Publication number
EP0544209A1
EP0544209A1 EP92119907A EP92119907A EP0544209A1 EP 0544209 A1 EP0544209 A1 EP 0544209A1 EP 92119907 A EP92119907 A EP 92119907A EP 92119907 A EP92119907 A EP 92119907A EP 0544209 A1 EP0544209 A1 EP 0544209A1
Authority
EP
European Patent Office
Prior art keywords
externally
valve
toothed
splines
toothed member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP92119907A
Other languages
German (de)
English (en)
Inventor
Matthew James Lammers
Sohan Lal Uppal
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eaton Corp
Original Assignee
Eaton Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eaton Corp filed Critical Eaton Corp
Publication of EP0544209A1 publication Critical patent/EP0544209A1/fr
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/103—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member one member having simultaneously a rotational movement about its own axis and an orbital movement
    • F04C2/104—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member one member having simultaneously a rotational movement about its own axis and an orbital movement having an articulated driving shaft

Definitions

  • the present invention relates to low-speed, high-torque gerotor motors, and more particularly, to such motors of the type having a separate valve drive shaft driving the valve member.
  • the limitation on the torque-transmitting capability of the motor is the strength of the spline connection between the star member and the dogbone.
  • a portion of the axial length of the splines defined by the gerotor star member is required, merely to drive the valve drive shaft.
  • Driving the valve member whether it be a disk valve or a spool valve, requires a very small percentage of the total torque output of the motor, but typically, the spline connection between the star member and the orbiting and rotating valve drive shaft has taken up a significant portion of the gerotor star splines. This becomes a more serious problem in the case of relatively small displacement motors, in which the axial length of the gerotor may be on the order of one-half inch.
  • an improved rotary fluid pressure device of the type including housing means having fluid inlet means and fluid outlet means.
  • a fluid energy translating displacement means is associated with the housing means and includes a stationary, internally-toothed member, and an externally-toothed member eccentrically disposed within the internally-toothed member, and having orbital and rotational movement relative to the internally-toothed member, to define expanding and contracting fluid volume chambers, in response to the orbital and rotational movement.
  • Valve means cooperates with the housing means to provide fluid communication between the inlet means and the expanding fluid volume chambers and between the contracting fluid volume chambers and the outlet means.
  • FIG. 1 is an axial cross-section of a low-speed, high-torque spool valve gerotor motor made in accordance with the present invention.
  • FIG. 2 is an enlarged, fragmentary, axial cross-section, similar to FIG. 1, illustrating primarily the gerotor star and drive area.
  • the motor includes an output shaft 27 positioned within the shaft support casing 13, and rotatably supported therein by suitable bearing sets 29 and 31. Disposed adjacent the forward end of the bearing set 29 is a bearing retainer and snap ring assembly, generally designated 33.
  • the output shaft 27 includes a set of internal, straight splines 35, and in engagement therewith is a set of external, crowned splines 37, formed on a forward end of a main drive shaft 39.
  • Disposed toward a rearward end of the main drive shaft 39 is another set of external, crowned splines 41, in engagement with a set of internal, straight splines 43, formed on the inside diameter of the star member 23.
  • the ring member 21 includes nine internal teeth, and the star member 23 includes eight external teeth. Therefore, eight orbits of the star 23 result in one complete rotation thereof, and one complete rotation of the main drive shaft 39, and of the output shaft 27.
  • input-output shaft means may refer to either the output shaft 27 (which may comprise an input shaft if the motor is being used as a pump), and/or the main drive shaft 39.
  • FIGS. 4 and 5 provide a comparison of a disc valve motor utilizing a valve drive arrangement made in accordance with the "PRIOR ART", and a disc valve motor utilizing the valve drive arrangement of the present invention.
  • a stationary valve plate 191 Disposed between the gerotor ring member 121 and the valve housing section 119 is a stationary valve plate 191, which defines a plurality of fluid ports 157, each of which is in fluid communication with one of the expanding or contracting fluid volume chambers 125.
  • the axial dimension of the ring member 221 and star member 223 are identical to that of the ring member 121 and star member 123 of the FIG. 4 "PRIOR ART" device.
  • Adjacent the ring member 221 is a stationary valve plate 291 which has substantially less axial thickness than the valve plate 191 shown in FIG. 4, for reasons to be described subsequently.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Hydraulic Motors (AREA)
EP92119907A 1991-11-25 1992-11-23 Réduction et extension de cannelure pour un élément auxiliaire d'entraînement Ceased EP0544209A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US79767291A 1991-11-25 1991-11-25
US797672 1991-11-25

Publications (1)

Publication Number Publication Date
EP0544209A1 true EP0544209A1 (fr) 1993-06-02

Family

ID=25171498

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92119907A Ceased EP0544209A1 (fr) 1991-11-25 1992-11-23 Réduction et extension de cannelure pour un élément auxiliaire d'entraînement

Country Status (2)

Country Link
EP (1) EP0544209A1 (fr)
JP (1) JPH05248340A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1109823C (zh) * 1996-06-11 2003-05-28 尹顿公司 滑阀式齿轮转子马达
CN102840095A (zh) * 2012-09-21 2012-12-26 镇江大力液压马达有限责任公司 加强承载能力平面配流摆线液压马达

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3552893A (en) * 1969-05-07 1971-01-05 Lamina Inc Rotary casing orbital gear-rotor motor
US4992034A (en) * 1989-04-24 1991-02-12 Eaton Corporation Low-speed, high-torque gerotor motor and improved valving therefor
EP0412403A2 (fr) * 1989-08-09 1991-02-13 Eaton Corporation Dispositif rotatif à pression de fluide et plaque de soupape stationnaire perfectionnée

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3552893A (en) * 1969-05-07 1971-01-05 Lamina Inc Rotary casing orbital gear-rotor motor
US4992034A (en) * 1989-04-24 1991-02-12 Eaton Corporation Low-speed, high-torque gerotor motor and improved valving therefor
EP0412403A2 (fr) * 1989-08-09 1991-02-13 Eaton Corporation Dispositif rotatif à pression de fluide et plaque de soupape stationnaire perfectionnée

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1109823C (zh) * 1996-06-11 2003-05-28 尹顿公司 滑阀式齿轮转子马达
CN102840095A (zh) * 2012-09-21 2012-12-26 镇江大力液压马达有限责任公司 加强承载能力平面配流摆线液压马达
CN102840095B (zh) * 2012-09-21 2016-02-17 镇江大力液压马达股份有限公司 加强承载能力平面配流摆线液压马达

Also Published As

Publication number Publication date
JPH05248340A (ja) 1993-09-24

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