FR2723415A1 - Training mechanism operating in two direction of rotation - Google Patents

Training mechanism operating in two direction of rotation Download PDF

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Publication number
FR2723415A1
FR2723415A1 FR9508603A FR9508603A FR2723415A1 FR 2723415 A1 FR2723415 A1 FR 2723415A1 FR 9508603 A FR9508603 A FR 9508603A FR 9508603 A FR9508603 A FR 9508603A FR 2723415 A1 FR2723415 A1 FR 2723415A1
Authority
FR
France
Prior art keywords
rotation
levers
drive mechanism
direction
traction
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.)
Granted
Application number
FR9508603A
Other languages
French (fr)
Other versions
FR2723415B1 (en
Inventor
Rudolf Hendrich
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.)
Linde AG
Original Assignee
Linde AG
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 DE19944427509 priority Critical patent/DE4427509B4/en
Application filed by Linde AG filed Critical Linde AG
Publication of FR2723415A1 publication Critical patent/FR2723415A1/en
Application granted granted Critical
Publication of FR2723415B1 publication Critical patent/FR2723415B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H7/00Gearings for conveying rotary motion by endless flexible members
    • F16H7/08Means for varying tension of belts, ropes, or chains
    • F16H7/10Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/12Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
    • F16H7/1254Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means
    • F16H7/1281Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means where the axis of the pulley moves along a substantially circular path
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H7/00Gearings for conveying rotary motion by endless flexible members
    • F16H7/08Means for varying tension of belts, ropes, or chains
    • F16H2007/0802Actuators for final output members
    • F16H2007/0808Extension coil springs
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H7/00Gearings for conveying rotary motion by endless flexible members
    • F16H7/08Means for varying tension of belts, ropes, or chains
    • F16H2007/0863Finally actuated members, e.g. constructional details thereof
    • F16H2007/0874Two or more finally actuated members

Abstract

<P> Drive mechanism operating in both directions of rotation, <BR/> characterized in that each tension body (9, 10) is attached to a lever (5; 6) which is pivotable about a center of rotation (7, 8) and in that the two levers (5, 6), in order to produce rotational movements in the opposite direction of the levers (5, 6), are operably connected to each other by means of a connection by force and / or shape and are urged towards each other by a tensioning element. </ P>

Description

"Drive mechanism operating in both directions of rotation"

  The invention relates to a drive mechanism

  able to operate in both directions of rotation, in par-

  special chain drive mechanism, with a tension device for the pulling member which has tension bodies one for engaging with the strand of

  traction and the other to engage with the strand of

tower, drive mechanism.

  A drive mechanism, constituted in the form of a belt mechanism, is known from the document "Dubbel, Taschenbuch für den Maschinenbau, 16. Auflage, Springer-Verlag 1987, S.G 98". An elongation to be adjusted in

  function of the wear of the traction device is not com-

  thought in the case of this drive mechanism known by the voltage device used in this case, which can lead after a while to a deterioration

  sensitive properties of the traction member.

  To avoid this inconvenience, it is necessary

  to be able to tighten the traction member and it is necessary to

  systems accordingly and it is necessary to

  feel a fixed expense of maintenance. To the extent that this is not the case, a mechanism of this type is inappropriate for use in

  of control, in which there must be no

  table. In control devices for which one

  want to have no maintenance, for example

  vehicles, further adjustment work is required

indisputable.

  The present invention aims to provide a drive mechanism of the type mentioned at the beginning, which

  even in the case of long-term operation of

  properties as constant as possible and render superfluous adjustments to compensate for the lengthening

the traction member.

  This problem is solved according to the invention by virtue of the fact that each tension body is fixed on a lever which can pivot about a center of rotation and in that the two levers for producing rotational movements.

  in the opposite direction of the levers are in connection operation-

  with each other by force and / or

  form and are solicited by one

tensioning.

  Consequently, regardless of the direction of rotation,

  the drive mechanism, both the return strand and the pulling strand are tensioned, whereby it is not necessary to carry out adjustment work on the mounting of the drive mechanism to tension the traction and on the other hand the elongations, driven by the operation of the traction member are compensated

  in both directions of rotation of the drive mechanism.

  In this case, it occurs because of the operation-

  between the two levers which serve to compensate the

  along the traction member during each movement

  that one of the two levers achieves to compensate for the

  the traction unit towards the corresponding strand

  of the traction member, a synchronous movement in the opposite direction of the second lever, which also increases the

  tension of the other strand of the traction means.

  According to an advantageous development of the invention, it is proposed that the levers are in operative connection with a freewheel system blocking in the direction of reducing the tensioning force. In this way, the traction element is only subsequently adjusted when the drive mechanism is at rest, for example in the stopping phase or when the rotation direction of the drive mechanism is changed. As long as the organ of

  traction is under load, which occurs during

  in one of the two directions of rotation, there is no adjustment. With regard to a construction method as reliable as possible, it appeared desirable to provide

  a freewheel system acting on two levers.

  It is advantageous to have a configuration, in the case of which the tensioning device - with respect to a median plane extending perpendicularly through the

  axes of rotation of the drive wheel and the transmission wheel

  mission of the training mechanism - consists of

  symmetrically, one of the two levers being arranged

  two sides of the median plane and having a rotational center

  located at a certain distance from the median plane for

  as long as the pulling strand and the strand back from

  the traction member are loaded with the same tension.

  In addition, it is advantageous that the levers

  feel relative to the center of rotation corresponding central teeth or gears whose plan coincides with

  the median plane. In this way, we have an operation-

  the form between the two levers.

  In an advantageous configuration of the invention

  tion, the freewheel system is intended to be

  taken with the teeth of the levers. In addition to their

  In the case of the coupling of the two levers, the teeth still assume the function of an engagement of the freewheel system. Suitably the tension bodies engage the outer side of the tension member and a spring is tensioned directly or indirectly between the two levers. In fact, it is also possible to have a

  provision, in the event of which one solicits

  the inner side of the traction unit, however, in the first case mentioned, a more favorable winding angle of the traction member on the wheel is obtained.

  driving and the driven wheel of the drive mechanism.

  The tension bodies are constituted according to a configuration of the invention, preferably in the form of

  rollers to reduce friction losses.

  It is particularly advantageous to use the drive mechanism according to the invention for the steering system of a industrial truck, in particular of a forklift truck, which has at least one wheel that can turn around a truck. vertical axis, a system

  the direction of which is intended to produce the movement of

  tation of the wheel, which has an axis of action

  parallel to the vertical axis and is connected

  operational with the wheel by the driving mechanism

  is lying. In the case of such a steering control, one

  preferably uses a chain drive, which is

  turn right or turn left. In

  In this case, the device according to the invention automatically eliminates

  the game of the chain introduced during the year

long of it.

  The drive mechanism according to the invention is

  intended for driving a steering wheel of a

  riot handling, not shown in the single figure.

  A traction member 1, for example a chain, modifies accordingly in the direction of actuation of the

direction the direction of his movement.

  The directed wheel is rotatable about a point R, which corresponds to a vertical axis, the rotational movement taking place by means of a drive mechanism, which

  around a point L, which corresponds to an axis of ac-

  parallel to the vertical axis. By the point R passes in this way the axis of rotation of a transmission gear 2 of the drive mechanism and the point L passes the axis of rotation of the drive gear 3 of the drive mechanism. To compensate for an elongation due to the wear of the traction member 1, there is provided a tensioning device 4, which is constituted symmetrically with respect to a median plane M disposed perpendicularly through the axes of rotation of the wheel 3 and the transmission wheel 2. The tensioning device 4 has

  two sides of the median plane M two levers 5 and 6, which can

  pivot respectively about a center of rotation 7 or 8 located at a distance from the median plane M and at the end of which is fixed respectively a tension body 9 or 10 formed in the form of a roller. The

  tension body 9 and 10 engage the outer side

  of the traction member 1, a spring 11 being stretched

  between the two levers 5 and 6 to produce a voltage.

  The levers 5 and 6 have teeth 12 or

  13 centers in relation to the center of rotation correspon-

  7 or 8, whose contact plane coincides with the plan

  median M. In this way, we obtain an operation-

  by means of the connection between the two levers 5 and 6 in such a way that during a movement of one of the two levers a rotational movement is produced in one direction.

  opposite of the other lever. As a result - independently

  the direction of rotation of the drive mechanism - both the return and the traction

  thanks to the action of spring 11. When mounting the mech-

  training, it is therefore not necessary to

  to carry out adjustment work to soften

  the traction element 1. The elongations, due to the function

  of the traction unit are compensated in the

  two directions of rotation of the drive mechanism.

  A common freewheel system 14 acting on the two teeth 12 and 13 ensures that the traction member 1 can be adjusted only when it is at rest. When the traction member 1 is loaded, while it rotates in operation in one of two directions of rotation,

  tion, there is no adjustment.

R E V E ND I C A T IO N S

  1) Drive mechanism operable in both directions of rotation, in particular chain drive mechanism, with a tensioning device (4) for the traction member (1), which has tensioning bodies (9) , 10), one to come into contact with the strand of

  traction and the other to engage with the strand of

  tower, driving mechanism characterized in that each tension body (9, 10) is attached to a lever (5, 6) which is pivotable about a center of rotation (7, 8) and that both levers (5, 6) for producing rotational movements in the opposite direction of the levers (5, 6) are operatively connected to each other by means of a link

  by force and / or form and are solicited reciprocally

  only by a tensioning element.

  2) Drive mechanism according to the claim

  1, characterized in that the levers (5, 6) are in operational connection with a freewheel system (14) which locks in the direction of reducing the force of

in tension.

  3) Drive mechanism according to the claim

  2, characterized in that a system of

  free wheel (14) acting on both levers (5, 6).

  4) Drive mechanism according to any one

  as in claims 1 to 3, characterized in that

  positive voltage (4) is constituted symmetrically -

  relative to a median plane (M) extending perpendicularly

  through the axes of rotation of the drive wheel

  (3) and the transmission wheel (2) of the drive mechanism

  the levers (5, 6) being arranged respectively

  on both sides of the median plane (M) and having a center of rotation (7, 8) situated at a distance from the

median plane (M).

   ) Drive mechanism according to claim 4, characterized in that the levers (5, 6) have

  central gears (12, 13) with respect to the center

  rotating respondent (7; 8) including the plane of the gear

coincides with the median plane (M).

  6) Drive mechanism according to the claim

  5, characterized in that the freewheel system (14) engages with the gears (12, 13) of the levers (5, 6).

  7) Drive mechanism according to any one

  as in claims 1 to 6, characterized in that the

  tension body (9, 10) are engaged with the outer side.

  the pulling member (1) and a spring is taut

  directly or indirectly between the two levers (5, 6).

  8) Drive mechanism according to any one

  claims 1 to 7, characterized in that the

  tension body (9, 10) are in the form of rollers.

  9) Use of a driving mechanism se-

  any one of claims 1 to 8 for the system

  direction of a handling truck, in particular of a forklift, which presents

  at least one wheel that can rotate about a vertical axis

  cal, in which it is intended to produce the movement of

  rotation of the wheel a steering device, which pre-

  an axis of actuation parallel to the vertical axis and which is in operative connection with the wheel by means of the

drive mechanism.

FR9508603A 1994-08-03 1995-07-17 Drive mechanism operating in both ways of rotation Expired - Fee Related FR2723415B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19944427509 DE4427509B4 (en) 1994-08-03 1994-08-03 Traction mechanism gearbox for operation in both directions of rotation

Publications (2)

Publication Number Publication Date
FR2723415A1 true FR2723415A1 (en) 1996-02-09
FR2723415B1 FR2723415B1 (en) 1998-07-17

Family

ID=6524857

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9508603A Expired - Fee Related FR2723415B1 (en) 1994-08-03 1995-07-17 Drive mechanism operating in both ways of rotation

Country Status (2)

Country Link
DE (1) DE4427509B4 (en)
FR (1) FR2723415B1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19926612A1 (en) * 1999-06-11 2000-12-14 Schaeffler Waelzlager Ohg Belt drive of an internal combustion engine
DE19926613A1 (en) * 1999-06-11 2000-12-14 Schaeffler Waelzlager Ohg Belt tightener has two tensioning arms on pivot axle, two tensioning rollers, tensioning spring, thrust pieces, protuberance and recess, and base plate
DE10253241A1 (en) * 2002-11-15 2004-05-27 Ina-Schaeffler Kg Clamping device for a traction mechanism drive
ITMI20040993A1 (en) * 2004-05-18 2004-08-18 Candy Spa the tension adjusting device dodi a motion transmission belt
DE102005063364B4 (en) * 2005-08-20 2008-05-29 Friedrich Remmert Gmbh & Co. Kg Shelf storage with a stacker crane
DE102006033125A1 (en) * 2006-07-18 2008-01-24 Schaeffler Kg Tensioning unit for belts or chains in IC engines comprises spring-loaded lever with curved lower surface which cooperates with upper surface of swiveling tensioning plate, chain or belt being fitted over curved lower surface of plate
JP5469326B2 (en) * 2008-09-29 2014-04-16 ボーグワーナー インコーポレーテッド Tensioning device
US9133762B2 (en) * 2009-09-18 2015-09-15 GM Global Technology Operations LLC Drive belt tensioner for motor generator unit
CN103671776A (en) * 2013-12-12 2014-03-26 王忠利 Chain tension device
CN107416659A (en) 2017-09-01 2017-12-01 通力股份公司 Drive chain tension means, method and use its escalator system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US417512A (en) * 1889-12-17 Belt-tightener
DE261056C (en) * 1912-08-17 1913-06-13
US2210276A (en) * 1938-07-12 1940-08-06 Morse Chain Co Chain adjuster
DE1936308U (en) * 1962-09-25 1966-04-07 Faun Werke Chain tensioner for one in both directions about performance bearing chain drive.
FR2393987A1 (en) * 1978-06-07 1979-01-05 Shiroyama Kogyo Kk Chain tensioner for endless chain
DE3741860A1 (en) * 1987-12-10 1989-06-22 Schaeffler Waelzlager Kg Tension device for a belt
US4919233A (en) * 1988-06-03 1990-04-24 Blue Giant Equipment Corporation Front rider lift truck

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH148573A (en) * 1930-03-31 1931-07-31 Tuescher & Co Geb Clamping device for articulated chain drives.
US2875842A (en) * 1957-02-01 1959-03-03 John P Morrell Steering mechanism for lift trucks
US4758208A (en) * 1987-07-13 1988-07-19 General Motors Corporation Automatic belt tensioner for vehicle combined starter-generator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US417512A (en) * 1889-12-17 Belt-tightener
DE261056C (en) * 1912-08-17 1913-06-13
US2210276A (en) * 1938-07-12 1940-08-06 Morse Chain Co Chain adjuster
DE1936308U (en) * 1962-09-25 1966-04-07 Faun Werke Chain tensioner for one in both directions about performance bearing chain drive.
FR2393987A1 (en) * 1978-06-07 1979-01-05 Shiroyama Kogyo Kk Chain tensioner for endless chain
DE3741860A1 (en) * 1987-12-10 1989-06-22 Schaeffler Waelzlager Kg Tension device for a belt
US4919233A (en) * 1988-06-03 1990-04-24 Blue Giant Equipment Corporation Front rider lift truck

Also Published As

Publication number Publication date
DE4427509A1 (en) 1996-02-08
DE4427509B4 (en) 2004-08-26
FR2723415B1 (en) 1998-07-17

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