WO1993013336A1 - Conversion de la puissance motrice d'une machine - Google Patents

Conversion de la puissance motrice d'une machine Download PDF

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Publication number
WO1993013336A1
WO1993013336A1 PCT/GB1992/002364 GB9202364W WO9313336A1 WO 1993013336 A1 WO1993013336 A1 WO 1993013336A1 GB 9202364 W GB9202364 W GB 9202364W WO 9313336 A1 WO9313336 A1 WO 9313336A1
Authority
WO
WIPO (PCT)
Prior art keywords
conversion
cam
linear
motion
follower
Prior art date
Application number
PCT/GB1992/002364
Other languages
English (en)
Inventor
Josef Ehrlich
Original Assignee
Environmental Engines Limited
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 Environmental Engines Limited filed Critical Environmental Engines Limited
Publication of WO1993013336A1 publication Critical patent/WO1993013336A1/fr

Links

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
    • F16H25/08—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for interconverting rotary motion and reciprocating motion
    • F16H25/14—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for interconverting rotary motion and reciprocating motion with reciprocation perpendicular to the axis of rotation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B9/00—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups
    • F01B9/04—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft
    • F01B9/06—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft the piston motion being transmitted by curved surfaces
    • 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

  • This invention relates to the conversion of drive between rotary and linear motion.
  • the present invention relates to the conversion of drive between linear and rotary motion such as would be involved in the operation of a prime mover such as an internal combustion engine, and/or the conversion of rotational drive to linear drive such as would be involved in a pumping arrangement in which the rotation of a driven shaft is utilised to displace a linearly movable pump piston.
  • apparatus for the conversion of motion between linear and rotational movements/displacements characterised by the provision of means for controlling the conversion relationship between the rotational and linear movements whereby the motion conversion relationship effectable by the apparatus can be selectively established.
  • the means for controlling means includes means for enabling selective setting of the extent of linear displacement in relation to rotational movement.
  • said selective establishment i.e., setting, involves means for enabling selective increase or decrease of the extent of linear displacement in relation to rotational movement.
  • the means for controlling includes a cam and cam follower arrangement.
  • a preferred form of the cam and follower arrangement is characterised by primary and secondary cam surfaces operationally compatible with each other and arranged for simultaneous rotation about a first axis; a primary cam follower means pivotal about a second axis spaced from the first axis and operationally co-operable with the primary cam surface; a secondary cam follower means pivotally movable about the second axis and operationally cooperable with the secondary cam surface, the secondary cam follower means being constrained simultaneously to displace with the primary cam follower means about the second axis; the primary cam follower means being adapted for connection to a linearly movable member.
  • FIG. 2 schematically illustrates a modified form of the apparatus shown in Figure 1.
  • an element 1 which is required to undergo linear reciprocatory displacement/movement is constrained (by any convenient means not shown) for reciprocatory movement along a direction indicated by the arrow headed line 2.
  • An element 3 that is intended to undergo rotational movement is shown as a shaft that is rotatable about a first axis 4.
  • a drive conversion system 5 for effecting the drive conversion between the element 1 and the shaft 3 is operationally interposed between the element 1 and the shaft 3.
  • This drive conversion system 5 is formed by a cam assembly including a primary cam 6 providing a primary cam surface 7 and a secondary cam 8 providing a secondary cam surface 9 the assembly being mounted for rotation with the shaft 3.
  • cam surfaces 7 and 9 are profiled so as to be operationally compatible with each other.
  • the camming characteristics of the cam assembly 5 can be selectively establised or set by selection of the overall dimensions o f the cam bodies 6 and 8 as well a s the particular shaping of the actual cam surfaces 7 and 9.
  • the cam follower arrangement 10 of the cam and follower assembly 5 is mounted for pivotal movement about a shaft 11 whose longitudinal axis defines the pivotal axis of the cam follower arrangement 10.
  • the cam follower arrangement 10 includes a primary cam follower lever 12 carrying a roller 13 which is intended to make rolling contact with the primary cam surface 7, and a secondary cam follower lever 14 carrying a roller 15 which is intended to make rolling contact with the secondary cam surface 9.
  • the distances between the lines of contact of the rollers 13 and 15 and their respectively associated cam surfaces 7 and 9 and the pivotal axis of the shaft 11 carrying the cam follower arrangement 10 are, in this specification regarded as the basic effective lengths of the levers 12 and 14, whilst the angular relationships between the primary and secondary levers 12 and 14 are for convenience regarded as the geometry of the assembly.
  • the lever 12 is provided with an extension 17 whose free end 18 pivotally, i.e., operationally, connects with a link 19 which in turn operationally couples with the element 1.
  • the extension is inclined to the lever 12.
  • the effect of the extension 17 is to increase the effective length of the lever 12 and the geometry thereof relative to the remainder of the cam follower assembly 10 in such manner that the operational effect of the cam assembly 5 is multiplied by a factor related to the length and angular set of the extension 17 with respect to the remainder of the lever 12.
  • the extension 17 can be so angularly arranged relative to the remainder of the cam assembly as to achieve such requirement.
  • the cam follower assembly can be modified so as to incorporate at least one additional primary lever, associated and extension combination as shown in Figure 2. As an example, one such additional combination could extend in the opposite direction to that shown in the Figure 1.
  • FIG. 2 illustrates one such modification.
  • the cam follower assembly 5 is provided with and additional cam follower arm 12A, extension arm 17A, connection link 19A, and its associated linearly movable element 1A. It will be understood that any displacement of the cam follower arm 12 will produce a corresponding simultaneous displacement of the additional arm 12A.
  • Figure 2 illustrates the incorporation of one additional arm 12A it will be clear that further additional arms and associated elements could be interconnected to the follower assembly whereby a rotational motion can simultaneously displace several linear elements. Alternatively, the displacement of the main cam follower by way of one of the linearly movable elements involved would clearly produce the motion conversions throughout the modified apparatus.
  • a least one further cam follower assembly can be operationally associated with the single cam assembly 5 with each such additional assembly including one or more of the primary lever, follower and extension combination.
  • motion conversion can be between a single rotary element and several linearly movable elements.
  • the proposals of the invention disclose proposals for the conversion of motion between linear and rotational motions which affords a considerable number of degrees of freedom in establishing the parameters of the conversions.
  • the conversion characteristics can be selectively established by being able to consider the possibilities arising from the separate or collective efffects of the adjustment of matters such as:- selective setting of the extent of linear movement/displacement in relation to rotational movement; selective increase or decrease of the extent of linear displacement in relation to rotational movement; selective establishment of the rate of the linear displacement with respect to the rotational movements; selective establishment of the force associated with the rotational movement; selection of the location at which drive connections are effected between the linearly movable elements and cam and follower arrangements.
  • adjustment means are provided to enable the selection.
  • this adjustment means is effectively formed by the dimensions and geometry of the extension 17. Furthermore, the location of such connection could conceivably be along the length of the actual follower arm.
  • a further possible degree of freedom in establishing the motion convention is that it is possible to effect selective establishment of moment of the cam follower system 12, 13 of the cam and follower arrangement 5 is utilised to control the rotational torque arising during the motion conversion.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

L'invention se rapporte à un appareil pour la conversion de la puissance motrice d'une machine entre un mouvement rotatif et un mouvement linéaire. Cet appareil se caractérise par l'existence d'un système (5) qui commande la relation de conversion entre le mouvement de rotation et le mouvement linéaire, pour que cette relation de conversion du mouvement assurée par l'appareil puisse être établie de façon sélective. Ce système (5) de conversion de la puissance motrice d'une machine est constitué par une unité à cames comprenant une came primaire (6) formant une surface de came primaire (7), et une came secondaire (8) formant une surface de came secondaire (9), cette unité de cames étant montée de façon à effectuer un mouvement rotatif avec l'arbre (3). L'agencement suiveur de came (10) comprend un levier suiveur de came primaire (12) portant une roulette (13) destinée à entrer en contact roulant avec la surface de came primaire (7), ainsi qu'un levier suiveur de came secondaire (14) portant une roulette (15) destinée à entrer en contact roulant avec la surface de came secondaire (9).
PCT/GB1992/002364 1991-12-20 1992-12-18 Conversion de la puissance motrice d'une machine WO1993013336A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9127036.3 1991-12-20
GB919127036A GB9127036D0 (en) 1991-12-20 1991-12-20 Drive conversion

Publications (1)

Publication Number Publication Date
WO1993013336A1 true WO1993013336A1 (fr) 1993-07-08

Family

ID=10706568

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1992/002364 WO1993013336A1 (fr) 1991-12-20 1992-12-18 Conversion de la puissance motrice d'une machine

Country Status (3)

Country Link
AU (1) AU3167593A (fr)
GB (1) GB9127036D0 (fr)
WO (1) WO1993013336A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2322680A (en) * 1997-02-28 1998-09-02 Xerox Corp A compact cam drive assembly for moving a lens of an electrophotographic apparatus
WO1998059155A1 (fr) * 1997-06-20 1998-12-30 Cyril Andrew Norton Moteur
GB2424455A (en) * 2005-03-23 2006-09-27 Shane Engines Ltd A motion converter and piston assembly
RU2480597C1 (ru) * 2011-11-30 2013-04-27 Василий Прокопьевич Абросимов Двигатель внутреннего сгорания

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE408396A (fr) *
DE271396C (fr) *
GB310632A (en) * 1928-04-05 1929-05-02 Paul Marchetti Improvements in means for converting reciprocating into rotary motion and vice versa
US1790198A (en) * 1929-02-18 1931-01-27 Cizek Vojtech Internal-combustion engine
DE3033088A1 (de) * 1980-09-03 1982-04-01 Siegfried 4600 Dortmund Reiffer Kolbenmaschine mit schubkurvengetriebe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE408396A (fr) *
DE271396C (fr) *
GB310632A (en) * 1928-04-05 1929-05-02 Paul Marchetti Improvements in means for converting reciprocating into rotary motion and vice versa
US1790198A (en) * 1929-02-18 1931-01-27 Cizek Vojtech Internal-combustion engine
DE3033088A1 (de) * 1980-09-03 1982-04-01 Siegfried 4600 Dortmund Reiffer Kolbenmaschine mit schubkurvengetriebe

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2322680A (en) * 1997-02-28 1998-09-02 Xerox Corp A compact cam drive assembly for moving a lens of an electrophotographic apparatus
WO1998059155A1 (fr) * 1997-06-20 1998-12-30 Cyril Andrew Norton Moteur
GB2424455A (en) * 2005-03-23 2006-09-27 Shane Engines Ltd A motion converter and piston assembly
GB2424455B (en) * 2005-03-23 2008-12-17 Shane Engines Ltd A motion converter and piston assembly
RU2480597C1 (ru) * 2011-11-30 2013-04-27 Василий Прокопьевич Абросимов Двигатель внутреннего сгорания

Also Published As

Publication number Publication date
AU3167593A (en) 1993-07-28
GB9127036D0 (en) 1992-02-19

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