EP0636788B1 - Pompe volumétrique à piston animé d'un mouvement linéaire alternatif - Google Patents

Pompe volumétrique à piston animé d'un mouvement linéaire alternatif Download PDF

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Publication number
EP0636788B1
EP0636788B1 EP94401699A EP94401699A EP0636788B1 EP 0636788 B1 EP0636788 B1 EP 0636788B1 EP 94401699 A EP94401699 A EP 94401699A EP 94401699 A EP94401699 A EP 94401699A EP 0636788 B1 EP0636788 B1 EP 0636788B1
Authority
EP
European Patent Office
Prior art keywords
cam
pump
piston
bar
accordance
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
EP94401699A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0636788A1 (fr
Inventor
Jean-Pierre Huet
Alain Courtois
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.)
Dubuis SA
Original Assignee
Dubuis SA
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 claimed from FR9309395A external-priority patent/FR2708673A1/fr
Application filed by Dubuis SA filed Critical Dubuis SA
Publication of EP0636788A1 publication Critical patent/EP0636788A1/fr
Application granted granted Critical
Publication of EP0636788B1 publication Critical patent/EP0636788B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/042—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being cams

Definitions

  • the invention relates to a piston positive displacement pump with an alternating linear movement.
  • the invention is in particular intended to constitute a motorized pump for moving a fluid towards the body of a hydraulic cylinder for example for the actuation of tools such as crimping pliers, punching, etc.
  • pressure is exerted on a working member, mounted movably in a head, by means of a hydraulic cylinder actuated by a suction and treading pump as for example for the type of tools described. in FR-A-2,563,291.
  • the pumps used are manually controlled and the pump described in the above-mentioned document is a positive displacement piston pump with a linear reciprocating movement.
  • the actuating means are for example provided with operating handles but one can also imagine motor means, for example electric.
  • the invention provides an entirely original, practical and space-saving actuation system.
  • axial piston pumps are known, such as that described in document WO-A-8902532 in which the piston is driven in a reciprocating linear movement in the body of the pump by a cam mechanism which is rotated according to an axis coaxial with the longitudinal axis of the piston and which acts on one of the ends of said piston while the latter is permanently biased in the opposite direction by elastic means.
  • a pump according to the invention is notably remarkable in that it is provided with a deformable reservoir filled with fluid, in that the cam mechanism comprises a double cam and that the end of the piston turned towards said cam rests on a transverse bar fixed in rotation but guided in translation in the direction of movement of the piston, said bar resting on the cam, so that the latter, in combination with the elastic means, prints on said bar and on the piston, a reciprocating rectilinear movement which makes it possible to move the fluid from said reservoir to a circuit of use.
  • the cam is provided with a tail, itself driven in rotation.
  • the invention is mainly intended to design a motorized pump and it is then simple to provide a small electric motor powered by accumulators or rechargeable batteries and / or by connection to the mains, said motor being arranged to drive the cam.
  • the bar rests directly on the cam which slides while turning on said bar.
  • the bar rests on the cam by means of rollers with which it is provided, so that said rollers rotate in contact with said cam.
  • the bar has two rollers arranged at its ends and which are wedged by a spacer sleeve.
  • the deformable reservoir is, for example, annular and surrounds at least part of the pump body in which the piston is arranged.
  • the reservoir consists of a membrane, the sealed fixing of which is provided on the body or a part integral with the latter so as to seal the hydraulic circuit from the mechanical part, including in particular the bar, the cam and the corresponding end of the piston.
  • a pump according to the invention is in particular intended to actuate a hydraulic cylinder, but it is clear that all the known uses of the pumps are possible.
  • a pump provided with a body 1 forming a hollow cylinder 2 for a pump piston 3.
  • the body 1 further constitutes here, at the same time and in one piece, a body 1 'for a hydraulic cylinder provided with a piston 4 arranged to slide in said body 1' and which is biased by a spring 5 working at the compression.
  • the piston 3 of the pump in the form of a needle, is slidably longitudinally mounted in the cylinder 2. It comprises, in one piece or not, a foot 6 which is in contact or integral with a transverse bar 7 (by l 'intermediate here of a sleeve 7' which will be discussed below) arranged perpendicular to said piston 3.
  • the foot 6 is biased by a compression spring 8 wedged in the body 1 while the bar 7 and fixed in rotation and guided in translation in the direction of movement of the piston 3 by means of oblong notches 9a, 9b formed in the body 1 (or in a guide piece disposed around said body 1) and in which the ends of said bar 7 move.
  • the bar 7 is further urged by a double cam 11 provided with a tail 12 rotatably mounted, for example in a rolling bearing 13.
  • the bar 7 here comprises rollers 10 at its ends, which are wedged by the sleeve 7 ' serving as a spacer.
  • the foot 6 is in contact with the sleeve 7 'but as already said, if the foot 6 can be secured to the bar 7, the sleeve 7' can also be integral or in one piece with said bar 7.
  • the cam 11 is rotatably mounted around an axis 14 coaxial with the longitudinal axis of the piston 3.
  • FIG. 2 which only shows the essential parts or parts thereof which are necessary for a good understanding, clearly shows the particular shape of the cam 11 which is here a bell type cam, said to be double for having two hollows and two diametrically opposite bumps.
  • the cam urges through the rollers 10, the bar 7 and therefore the piston 3 to take a reciprocating rectilinear movement according to the double arrow T, that is to say back and forth, the return movement being provided by the aforementioned spring 8.
  • the rollers 10 rotate in contact with the cam 11, but it is clear that according to another embodiment comprising no rollers 10 or sleeve 7 ′, the cam 11 slides on the bar 7.
  • the shape of the cam is such that the piston takes two extreme positions when the cam makes a quarter turn, the piston therefore taking up the same position every half turn, which also means that a full revolution (360 °) for the cam creates two return movements for the piston.
  • the reciprocating movement of the piston 3 in the cylinder 2 conventionally makes it possible to aspirate, through at least one suction valve 15, a fluid contained in a deformable reservoir 16 formed of a flexible membrane 16 ′ to discharge it through a discharge valve 17 in the body 1 'of the hydraulic cylinder.
  • the hydraulic cylinder (1 ', 4) makes it possible to actuate any means and in particular, as already said, a tool. It is clear however that if the jack shown is a push jack, it is of course possible to actuate a jack to pull for a corresponding tool, the fluid being displaced towards the other end of the piston and the spring being of course reversed.
  • the device is also provided with a relief valve 18 retained on its seat by a spring 19.
  • This valve 18 can be actuated either optionally automatically (calibrated spring), or by the operation of a lever 20 in the form of a trigger, so as to control the retraction of the piston 4 of the jack by emptying the body 1 'by a circuit of discharge shown diagrammatically at 21, the fluid then returning to the reservoir 16.
  • the tail 12 of the cam 11 can be rotated by any means and in particular by an electric motor shown diagrammatically at 22.
  • the motor 22 will generally act via a pinion or gear system, so that its own axis can of course be offset.
  • the deformable reservoir is annular and surrounds at least a part of the body 1.
  • the flexible membrane 16 ′ is fixed in leaktight manner to the body 1 (or on, or between fixed or integral parts of said body 1) so that the hydraulic part is separated from the mechanical part comprising in particular the bar 7, the cam 11, and the corresponding end of the piston 3. It is also possible to provide, if necessary, additional and / or complementary tanks.
  • the one of the ends of the bar 7 would form a pivot while the other end guided as previously and whether or not provided with a roller, would be driven in an oscillating movement by a single cam, while urging the piston in a movement of back and forth.
  • the invention may relate to the displacement of a fluid for other applications (elevation of a fluid, transfer, ).
  • the invention essentially relates to the pump as shown diagrammatically in FIG. 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
EP94401699A 1993-07-30 1994-07-25 Pompe volumétrique à piston animé d'un mouvement linéaire alternatif Expired - Lifetime EP0636788B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR9309395A FR2708673A1 (fr) 1993-07-30 1993-07-30 Pompe volumétrique à piston animé d'un mouvement linéaire alternatif.
FR9309395 1993-07-30
FR9404788 1994-04-21
FR9404788A FR2708674B1 (fr) 1993-07-30 1994-04-21 Pompe volumétrique à piston animé d'un mouvement linéaire alternatif.

Publications (2)

Publication Number Publication Date
EP0636788A1 EP0636788A1 (fr) 1995-02-01
EP0636788B1 true EP0636788B1 (fr) 1997-03-05

Family

ID=26230521

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94401699A Expired - Lifetime EP0636788B1 (fr) 1993-07-30 1994-07-25 Pompe volumétrique à piston animé d'un mouvement linéaire alternatif

Country Status (5)

Country Link
US (1) US5472322A (es)
EP (1) EP0636788B1 (es)
DE (1) DE69401864T2 (es)
ES (1) ES2099553T3 (es)
FR (1) FR2708674B1 (es)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10114135A (ja) * 1996-10-12 1998-05-06 Riso Kagaku Corp 減圧式孔版印刷方法及び装置
PT944937E (pt) * 1997-10-15 2002-07-31 Klauke Gmbh Gustav Dispositivo de pressao hidraulico
AT407660B (de) * 1998-11-04 2001-05-25 Hoerbiger Hydraulik Hydraulisches kombiaggregat
US6453719B1 (en) 2000-07-28 2002-09-24 Fci Usa, Inc. Hydraulic tool with forward surrounding reservoir
JP2007512967A (ja) * 2003-12-04 2007-05-24 フォン、アークス、アクチェンゲゼルシャフト 電動式加圧工具装置
US7428812B2 (en) * 2006-05-04 2008-09-30 Fci Americas Technology, Inc. Hydraulic tool with wobble plate transmission
US7487654B2 (en) 2006-10-13 2009-02-10 Fci Americas Technology, Inc. Hydraulic tool with tactile feedback
US8122585B2 (en) * 2007-02-20 2012-02-28 Hubbell Incorporated Spanner plate
JP4937801B2 (ja) 2007-03-19 2012-05-23 パスカルエンジニアリング株式会社 アクチュエータ、アクチュエータを備えたアンクランプ装置および加工装置
US8235689B2 (en) * 2008-11-03 2012-08-07 Gojo Industries, Inc. Piston pump with rotating pump actuator
CN220791422U (zh) * 2019-07-17 2024-04-16 米沃奇电动工具公司 用于液压工具的泵组件
US11703039B2 (en) 2020-08-07 2023-07-18 Ridge Tool Company Wobble plate pump drive with gear box

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE404394A (es) *
US1929935A (en) * 1930-11-07 1933-10-10 Rennerfelt Sven Bernhard Spring injection fuel pump
US2540357A (en) * 1946-03-18 1951-02-06 Stanley William Spray gun
DE943985C (de) * 1952-05-08 1956-06-07 Hans Goeldner & Co Elektromotorisch angetriebene Kolbenmaschine
FR1351516A (fr) * 1962-12-26 1964-02-07 Pompe, notamment pour fluides gazeux
JPS55123380A (en) * 1979-03-13 1980-09-22 Jeol Ltd Ultra-fine quantitative pump
JPS58150082A (ja) * 1982-03-01 1983-09-06 Toshiba Corp 対向斜板式圧縮機
JPS58150083A (ja) * 1982-03-01 1983-09-06 Toshiba Corp 対向斜板式圧縮機
JPS60108784U (ja) * 1983-12-26 1985-07-24 三菱電機株式会社 真空ポンプ
FR2563291A1 (fr) * 1984-04-20 1985-10-25 Etude Methode Applic Sarl Verin hydraulique a commande manuelle
SE459437B (sv) * 1987-09-10 1989-07-03 Hydro Pneumatic Ab Axialkolvpump av hoegtryckstyp med kamdrivmekanism
DE3903546A1 (de) * 1988-04-13 1989-10-26 Franz Georg Miller Vorrichtung zur umwandlung einer drehbewegung in eine laengsbewegung und umgekehrt
US5037276A (en) * 1989-04-04 1991-08-06 Flow International Corporation High pressure pump valve assembly
CA2057680C (en) * 1991-12-16 1995-09-05 Jacques Tanguay Felling and delimbing apparatus allowing to delimb trees in length, and its method of use
US5253981A (en) * 1992-03-05 1993-10-19 Frank Ji-Ann Fu Yang Multichannel pump apparatus with microflow rate capability

Also Published As

Publication number Publication date
DE69401864D1 (de) 1997-04-10
DE69401864T2 (de) 1997-06-12
EP0636788A1 (fr) 1995-02-01
FR2708674A1 (fr) 1995-02-10
ES2099553T3 (es) 1997-05-16
US5472322A (en) 1995-12-05
FR2708674B1 (fr) 1996-05-15

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