US3732786A - Multi-stage rotary jacks - Google Patents

Multi-stage rotary jacks Download PDF

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Publication number
US3732786A
US3732786A US00143157A US3732786DA US3732786A US 3732786 A US3732786 A US 3732786A US 00143157 A US00143157 A US 00143157A US 3732786D A US3732786D A US 3732786DA US 3732786 A US3732786 A US 3732786A
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US
United States
Prior art keywords
stage
casing
rotor
shaft
stator
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
US00143157A
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English (en)
Inventor
A Grosseau
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.)
Automobiles Citroen SA
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Automobiles Citroen SA
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Filing date
Publication date
Application filed by Automobiles Citroen SA filed Critical Automobiles Citroen SA
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Publication of US3732786A publication Critical patent/US3732786A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/12—Characterised by the construction of the motor unit of the oscillating-vane or curved-cylinder type

Definitions

  • stator and rotor mem- [52] US. Cl. ..92/66, 92/679,l92l/6172i, bers of each Stage are idly mounted on a central Shaft except for one of said members of an end stage and [51] int. Cl. ..F0lb 15/00, F15b 11/18 this excepted end member is keyed to the central Shaft [58] Field of Search ..235/201 ME;
  • the present invention has for an object a rotary jack having multiple elements which removes or minimizes these drawbacks and, in particular, allows a limited rotation to be obtained but, nevertheless, which is as high as is desired.
  • the invention allows several successive rotations to be obtained on the same member and having a predetermined value, the sum of these rotations being capable of exceeding 360.
  • the invention has for an object a multistage rotary jack, each stage or elementary rotary jack comprising a vane that is capable of turning with reference to the wall of a cylindrical chamber, these two members indiscriminately constituting what can be referred to as the rotor and the stator of the element.
  • these stages are coaxially aligned one above the other and their members (stator and rotor) are idly mounted on a central'shaft with the exception of one of the members (rotor or stator) of one end stage that is itself keyed on to rotate with the central shaft but, however, the rotor of each stage is keyed on to rotate with the stator of one of two contiguous stages.
  • the central shaft has at least one supply channel leading into the interior of the chambers of each stage.
  • FIG. 1 shows an axial section through a four-stage rotary jack in accordance with the invention
  • FIG. 2 shows a section along the line II-II of FIG. 1
  • FIG. 3 shows a section along the line III-III of FIG. 1
  • FIG. shows a section along the line VV of FIG.
  • FIGS. 1 and 2 in which can be seen ajack that comprises four identical stages or elements, designated by the general reference A,B,C and D.
  • Each stage is constituted by a cylindrical casing 1 having in the interior thereof a sleeve 2 provided with a radial vane 2a which is mounted to rotate about the axis of the casing.
  • An abutment 3 fixed to the casing l and extending up to the sleeve 2 limits the angular movement of displacement of the vane and defines with it two chambers la and lb.
  • the vane and the casing respectively constitute the rotor and the stator of each stage in the embodiment herein described.
  • the sleeves 2 and the casings 1 of each stage are idly mounted on a central shaft 4 by means of roller bearings.
  • the central shaft thus ensures a satisfactory alignment and centering of all the stages of the jack.
  • the rotor 2, 2a of the upper end stage D is keyed on so as FIG. 4 shows a view similar tothat of FIG. 1, of a to rotate with the shaft 4 by any desired means, but the casing 1 forming the stator of the lower end stage A is fixed to a block P constituting the lower end of this sta-
  • the sleeve 2 is connected to the shaft 4 through an intermediate rotatable member 21, which includes a downwardly extending finger 22 received in a recess 23 in sleeve 2.
  • the shaft 4 is fastened to the rotatable member 21 by a suitable fastening means, such as screws 24.
  • a suitable fastening means such as screws 24.
  • rotation of sleeve 2 causes an interior surface of recess 23 to engage the finger 22, whereby the rotatable member 21 is rotated by the sleeve 2, the rotatable member in turn rotating the shaft 4.
  • the rotor 2 of the stage A passes through the upper cover of the casing of this stage and has at its end a recess 2b cooperating with a spigot 1c provided on the inner surface of the casing l of the contiguous stage 13.
  • the same construction is employed for the other stages, each rotor thus being keyed to rotate on the stator of one of the two contiguous stages.
  • Two conduits 5 and 6 are provided in the casing l of the lower end stage A, said conduits leading respectively into the chambers 1a and 1b of this stage. These conduits are respectively adapted to be connected to a source of fluid under pressure and discharge piping.
  • the return to the initial position represented in FIG. 2 is effected by permuting the connections of the conduits 5 and 6.
  • FIGS. 4 and 5 show another embodiment of the invention, in which the members referred to above are not described again but have been given the same reference numerals augmented by 100.
  • the central shaft 104 is fixed and the stator of the lower stage A, constituted by a sleeve 102, provided with two symmetrical radial vanes 102a, is also fixed by downwardly extending fingers 131 received in recesses 132 in base 133.
  • the sleeve 102 is connected to the shaft 104 through the base 133.
  • the rotor 101 carries two abutments 103 and is keyed on the lower stator of the next adjacent upper stage B, by a suitable keying means. As shown, keying is effected by fingers 141 on the inner surface of the. stage B, which are received in and cooperate with corresponding recesses 142 in the rotor 101 of the stage A,.
  • each of the other stages is keyed on the stator of the stage immediately thereabove and the rotor 101 of stage D, is keyed to wheel 113.
  • the rotor constituted by casing 101, is keyed to rotate on a toothed wheel 113 cooperating with a driving member that is not shown in the drawing.
  • Each stage of the composite jack comprises two vanes and thus two chambers 101a and two chambers llb are present. All the chambers 101b communicate via a bore 112 and necks 110 and are adapted to be successively connected to discharge piping and piping for fluid under pressure.
  • the bores 11 1a and lllb, etc. are, on the other hand, provided on the central shaft and respectively communicate by necks 109 with the chambers 101a of each stage.
  • the rotor 101 of the stage B is displaced in the direction of the arrow F, until it comes to rest on the abutments 103 by diminution of the chambers l0lb which drive back the fluid that they contain, into the bore 112.
  • the rotor 101 of the stage 8 drives the stator of the stage C which drives the corresponding rotor by the vanes resting on the abutments 103 and so on up to the rotor 101 of the upper end stage keyed on the toothed wheel 113. This latter thus turns about an angle equal to that of the rotor of the stage 8,.
  • the supply of the fluid under pressure from another stage causes the rotation of the toothed wheel to be added to the preceding one.
  • the return to the initial position may be effected in two fashions: firstly, if the group of the bores 111a,
  • two or more stages may be coupled together in parallel in a manner similar to that described above with reference to FIGS. 1, 2 and 3.
  • shock absorbers When the multi-stage rotary jack is utilized for moving a heavy mass, it may be necessary to use shock absorbers to avoid shocks at the termination of the travel.
  • shock absorbers may be of any desired kind, for example, utilizing springs or having resilient or pneumatic abutments.
  • they may have a construction identical to that of the jacks hereinabove described, interposed at any desired points of the chain, but perma-.
  • stage B is a shock-absorbing stage
  • its bore lllb may be permanently supplied, thus maintaining the abutments 103 touching the vanes 102a in the direction of the arrow F,.
  • a counter-pressure less than that of the supply pressure of the bore 111b, is maintained in the central channel 112, for example, by a discharge valve adjusted to a convenient value.
  • Such a stage B thus constituted as a shock absorber, allows the shocks to be limited when the wheel 113 is moved in the direction opposite to that of arrow F,.
  • the abutments 103 can slightly elongate the vanes 102a whilst driving back the feed fluid into the bore lllb.
  • a certain energy due to the inertia of the members in movement may be dissipated by the alternate flows passing through the bores lllb and the bore 112 which are provided with discharge valves which are conveniently adjusted.
  • a rotaryjack comprising:
  • each stage comprising a casing and a sleeve within the casing, said casing including a rotational restraining means, said sleeve including a vane, the casing and the sleeve being mounted coaxially around said shaft for relative rotational movement with respect to each other, said vane and rotational restraining means cooperating with each other to limit the relative rotational movement of said casing and sleeve, one of said casing and sleeve defining a rotor and the other a stator, the rotor of one stage being drivingly connected to the stator of one of its contiguous stages, the stator and rotor of said at least one intermediate stage being idly mounted on said shaft and one of said rotor and said stator of one of the end stages being connected to the shaft.
  • a rotary jack as defined in claim 1 wherein a chamber of at least one stage is a shock absorber and is permanently connected to a conduit for carrying fluid under pressure.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Damping Devices (AREA)
  • Hydraulic Motors (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
US00143157A 1968-03-29 1971-05-13 Multi-stage rotary jacks Expired - Lifetime US3732786A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR146488 1968-03-29

Publications (1)

Publication Number Publication Date
US3732786A true US3732786A (en) 1973-05-15

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ID=8648405

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US00143157A Expired - Lifetime US3732786A (en) 1968-03-29 1971-05-13 Multi-stage rotary jacks

Country Status (4)

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US (1) US3732786A (enrdf_load_stackoverflow)
DE (1) DE1915370A1 (enrdf_load_stackoverflow)
FR (1) FR1566787A (enrdf_load_stackoverflow)
GB (1) GB1256798A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4759186A (en) * 1985-12-26 1988-07-26 Sundstrand Corporation Self-powered rotary actuator utilizing rotation-generated centrifugal head
US4825754A (en) * 1986-11-26 1989-05-02 S.A.M.M.-Societe D'applications Des Machines Motrices Vane-type rotary hydraulic actuator device intended for driving an aircraft control surface
US5701799A (en) * 1995-03-31 1997-12-30 Ab Rexroth Mecman Plural rotary actuators
US6546842B2 (en) * 1999-08-17 2003-04-15 Esko Raikamo Power unit for positioning valves, or the like, into desired position
US20140305235A1 (en) * 2013-04-10 2014-10-16 Abi Anlagentechnik-Baumaschinen-Industriebedarf Maschinenfabrik Und Vertriebsgesellschaft Mbh Vibration exciter for construction machines

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2836647A1 (de) * 1978-08-22 1980-03-06 Helmut Mackfeld Drehkolbenantrieb
FR2496185A1 (fr) * 1980-12-16 1982-06-18 Renault Articulation a motorisation hydraulique
JPS584388A (ja) * 1981-06-30 1983-01-11 ファナック株式会社 工業用ロボツトの手首機構
US4899637A (en) * 1982-04-12 1990-02-13 Moog Controls Inc. Oscilatory hydraulic actuators with internal supply, return, and control passageways for multi-axis wrist actuator
JPS58178001A (ja) * 1982-04-12 1983-10-18 ム−グ・インコ−ポレ−テツド 回転アクチユエ−タ及びアクチユエ−タ組立体

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2911956A (en) * 1959-01-07 1959-11-10 Bryant Grinder Corp Shaft positioner
US3289544A (en) * 1964-03-04 1966-12-06 Daniels Dennis Rotary actuator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2911956A (en) * 1959-01-07 1959-11-10 Bryant Grinder Corp Shaft positioner
US3289544A (en) * 1964-03-04 1966-12-06 Daniels Dennis Rotary actuator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4759186A (en) * 1985-12-26 1988-07-26 Sundstrand Corporation Self-powered rotary actuator utilizing rotation-generated centrifugal head
US4825754A (en) * 1986-11-26 1989-05-02 S.A.M.M.-Societe D'applications Des Machines Motrices Vane-type rotary hydraulic actuator device intended for driving an aircraft control surface
US5701799A (en) * 1995-03-31 1997-12-30 Ab Rexroth Mecman Plural rotary actuators
US6546842B2 (en) * 1999-08-17 2003-04-15 Esko Raikamo Power unit for positioning valves, or the like, into desired position
US20140305235A1 (en) * 2013-04-10 2014-10-16 Abi Anlagentechnik-Baumaschinen-Industriebedarf Maschinenfabrik Und Vertriebsgesellschaft Mbh Vibration exciter for construction machines

Also Published As

Publication number Publication date
FR1566787A (enrdf_load_stackoverflow) 1969-05-09
DE1915370A1 (de) 1969-10-09
GB1256798A (enrdf_load_stackoverflow) 1971-12-15

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