US2891413A - Electrically operated jack-like actuators - Google Patents

Electrically operated jack-like actuators Download PDF

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Publication number
US2891413A
US2891413A US658715A US65871557A US2891413A US 2891413 A US2891413 A US 2891413A US 658715 A US658715 A US 658715A US 65871557 A US65871557 A US 65871557A US 2891413 A US2891413 A US 2891413A
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US
United States
Prior art keywords
electrically operated
actuators
jack
operated jack
housing
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.)
Expired - Lifetime
Application number
US658715A
Inventor
Millns Terence William
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.)
Lucas Support Services Ltd
Original Assignee
Rotax Ltd
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
Priority to GB15524/56A priority Critical patent/GB805424A/en
Application filed by Rotax Ltd filed Critical Rotax Ltd
Priority to US658715A priority patent/US2891413A/en
Application granted granted Critical
Publication of US2891413A publication Critical patent/US2891413A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C13/00—Control systems or transmitting systems for actuating flying-control surfaces, lift-increasing flaps, air brakes, or spoilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H2025/2062—Arrangements for driving the actuator
    • F16H2025/2075—Coaxial drive motors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18296—Cam and slide
    • Y10T74/18304—Axial cam
    • Y10T74/18312—Grooved
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
    • Y10T74/18576—Reciprocating or oscillating to or from alternating rotary including screw and nut
    • Y10T74/18672—Plural screws in series [e.g., telescoping, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19642—Directly cooperating gears
    • Y10T74/19698—Spiral
    • Y10T74/19702—Screw and nut
    • Y10T74/19744—Rolling element engaging thread
    • Y10T74/19781—Non-recirculating rolling elements
    • Y10T74/19786—Captured sphere

Definitions

  • This invention relates to electrically operated jack-like actuators for moving the flight control members of aircraft or for other purposes and of the type comprising a pair of hollow cylindrical telescopic members one of which is in screw-thread connection with the other member.
  • the object of the invention is to enable an actuator of the said type to be provided in a compact form.
  • An actuator in accordance with the invention comprises a construction in which the electric motor and associated speed reduction gear are accommodated within the rotatable member of the actuator.
  • the actuator comprises a hollow cylindrical housing a which is closed at one end by an end cover b. From the inner face of the cover extends an axially arranged sub-housing c which contains the electric driving motor d and speed reduction gearing e of the epicyclic or other type.
  • the power output shaft driven by the gearing extends through the inner end of the sub-housing and has secured to it a disc g to the periphery of which is secured a hollow cylindrical jack member h having a helical groove i formed along its outer surface.
  • the subhousing containing the motor and gearing lies within one end of the said jack member.
  • the hollow cylindrical and axially movable complementary jack member k At one end this member is engaged with a longitudinal groove m in the inner surface of the outer housing a the connection being conveniently formed by a series of balls it carried by one end of the jack member k.
  • one end of the member k is adapted to form a nut for engaging the helical groove of the rotary jack member 11.
  • the nut consists in part of an annular arrangement of balls 0 engaging the helical groove of the rotary member h and carried in a groove in the other member k.
  • the axially movable member k is supported in part 2,891,413 Patented June 23, 1959 ICC by the inner surface of the outer housing and by a gland p combined with the end of the housing through which the outer end of the said member k extends, the said end being closed by a cover q.
  • An electrically operated jack-like actuator comprising in combination a pair of inner and outer hollow cylindrical telescopic members, the inner of which is rotatable but axially immovable, and the outer of which is axially movable but non-rotatable, means interconnecting said inner and outer members so that rotation of the inner member is accompanied by axial movement of the outer member, an electric actuating motor accommodated within the rotatable member, and speed reduction gearing through the medium of which said motor is operatively connected to said rotatable member, and which is also accommodated within said rotatable member.
  • An electrically operated jack-like actuator having in combination a hollow cylindrical housing in which the rotatable inner member and axially movable outer member are mounted, means effecting a slidable but non-rotatable connection between said axially movable member and said housing, a cover closing one end of said housing, an axially arranged subhousing extending from said cover into said rotatable member, and containing the electric actuating motor and speed reduction gearing, and an output shaft extending through the end of said sub-housing remote from said cover, and having a driving connection at one end with said gearing, the other end of said shaft being connected to said rotatable member.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Description

June-23, 1959 T. w. MlLLNS 2,891,413
ELECTRICALLY OPERATED JACK-LIKE ACTUATORS Filed May ;3, 1957 United States Patent ELECTRICALLY OPERATED JACK-LIKE ACTUATORS Terence William Millns, Westway, Shepherds Bush, London, England, assignor to Rotax Limited, W1llesden, London, England Application May 13, 1957, Serial No. 658,715
2 Claims. (Cl. 74-4243) This invention relates to electrically operated jack-like actuators for moving the flight control members of aircraft or for other purposes and of the type comprising a pair of hollow cylindrical telescopic members one of which is in screw-thread connection with the other member.
The object of the invention is to enable an actuator of the said type to be provided in a compact form.
An actuator in accordance with the invention comprises a construction in which the electric motor and associated speed reduction gear are accommodated within the rotatable member of the actuator.
In one example, as illustrated by the accompanying drawing, the actuator comprises a hollow cylindrical housing a which is closed at one end by an end cover b. From the inner face of the cover extends an axially arranged sub-housing c which contains the electric driving motor d and speed reduction gearing e of the epicyclic or other type. The power output shaft driven by the gearing extends through the inner end of the sub-housing and has secured to it a disc g to the periphery of which is secured a hollow cylindrical jack member h having a helical groove i formed along its outer surface. The subhousing containing the motor and gearing lies within one end of the said jack member.
Around the rotary jack member h is arranged the hollow cylindrical and axially movable complementary jack member k. At one end this member is engaged with a longitudinal groove m in the inner surface of the outer housing a the connection being conveniently formed by a series of balls it carried by one end of the jack member k. Also one end of the member k is adapted to form a nut for engaging the helical groove of the rotary jack member 11. Preferably the nut consists in part of an annular arrangement of balls 0 engaging the helical groove of the rotary member h and carried in a groove in the other member k.
The axially movable member k is supported in part 2,891,413 Patented June 23, 1959 ICC by the inner surface of the outer housing and by a gland p combined with the end of the housing through which the outer end of the said member k extends, the said end being closed by a cover q.
From the foregoing it will be understood that the whole of the motor and its associated gearing lies wholly within the rotary jack member 0. By this arrangement an actuator is provided in a form which is more compact so far as the overall length of the apparatus is concerned than an actuator of the same type and of conventional construction.
Having thus described my invention What I claim as new and desire to secure by Letters Patent is:
1. An electrically operated jack-like actuator comprising in combination a pair of inner and outer hollow cylindrical telescopic members, the inner of which is rotatable but axially immovable, and the outer of which is axially movable but non-rotatable, means interconnecting said inner and outer members so that rotation of the inner member is accompanied by axial movement of the outer member, an electric actuating motor accommodated within the rotatable member, and speed reduction gearing through the medium of which said motor is operatively connected to said rotatable member, and which is also accommodated within said rotatable member.
2. An electrically operated jack-like actuator according to claim 3, and having in combination a hollow cylindrical housing in which the rotatable inner member and axially movable outer member are mounted, means effecting a slidable but non-rotatable connection between said axially movable member and said housing, a cover closing one end of said housing, an axially arranged subhousing extending from said cover into said rotatable member, and containing the electric actuating motor and speed reduction gearing, and an output shaft extending through the end of said sub-housing remote from said cover, and having a driving connection at one end with said gearing, the other end of said shaft being connected to said rotatable member.
References Cited in the file of this patent UNITED STATES PATENTS 1,878,219 Wiard Sept. 20, 1932 2,260,671 Humphrey Oct. 28, 1941 2,438,545 Davidson Mar. 30, 1948 2,482,568 Werner Sept. 20, 1949 2,639,625 Geyer et al. May 26, 1953 2,751,789 Orenick June 26, 1956 FOREIGN PATENTS 220,914 Switzerland Apr. 30, 1942
US658715A 1956-05-18 1957-05-13 Electrically operated jack-like actuators Expired - Lifetime US2891413A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB15524/56A GB805424A (en) 1956-05-18 1956-05-18 Electrically operated jack-like actuators
US658715A US2891413A (en) 1956-05-18 1957-05-13 Electrically operated jack-like actuators

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB15524/56A GB805424A (en) 1956-05-18 1956-05-18 Electrically operated jack-like actuators
US658715A US2891413A (en) 1956-05-18 1957-05-13 Electrically operated jack-like actuators

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US2891413A true US2891413A (en) 1959-06-23

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2946235A (en) * 1959-08-20 1960-07-26 United Shoe Machinery Corp Thruster
US2966070A (en) * 1955-12-02 1960-12-27 Anderson Co Motion conversion unit
US4971292A (en) * 1989-08-23 1990-11-20 Craig Tool & Machine, Inc. Hoist apparatus

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1878219A (en) * 1926-11-01 1932-09-20 Buckeye Jack Mfg Company Lifting jack
US2260671A (en) * 1940-10-04 1941-10-28 Dee E Humphrey Well pump
CH220914A (en) * 1940-11-02 1942-04-30 Luftfahrtgeraetewerk Hakenfeld Device on adjustable struts under load to limit this load, in particular for aircraft adjustment rods.
US2438545A (en) * 1944-06-16 1948-03-30 Gen Motors Corp Geared motor linearly actuated
US2482568A (en) * 1945-05-26 1949-09-20 Gen Motors Corp Actuator control
US2639625A (en) * 1951-11-28 1953-05-26 Gen Motors Corp Motor driven actuator
US2751789A (en) * 1953-05-21 1956-06-26 Orenick Emil Mechanical movement

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1878219A (en) * 1926-11-01 1932-09-20 Buckeye Jack Mfg Company Lifting jack
US2260671A (en) * 1940-10-04 1941-10-28 Dee E Humphrey Well pump
CH220914A (en) * 1940-11-02 1942-04-30 Luftfahrtgeraetewerk Hakenfeld Device on adjustable struts under load to limit this load, in particular for aircraft adjustment rods.
US2438545A (en) * 1944-06-16 1948-03-30 Gen Motors Corp Geared motor linearly actuated
US2482568A (en) * 1945-05-26 1949-09-20 Gen Motors Corp Actuator control
US2639625A (en) * 1951-11-28 1953-05-26 Gen Motors Corp Motor driven actuator
US2751789A (en) * 1953-05-21 1956-06-26 Orenick Emil Mechanical movement

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2966070A (en) * 1955-12-02 1960-12-27 Anderson Co Motion conversion unit
US2946235A (en) * 1959-08-20 1960-07-26 United Shoe Machinery Corp Thruster
US4971292A (en) * 1989-08-23 1990-11-20 Craig Tool & Machine, Inc. Hoist apparatus

Also Published As

Publication number Publication date
GB805424A (en) 1958-12-03

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