WO2000035708A1 - Dispositif pour siege - Google Patents

Dispositif pour siege Download PDF

Info

Publication number
WO2000035708A1
WO2000035708A1 PCT/SE1999/002299 SE9902299W WO0035708A1 WO 2000035708 A1 WO2000035708 A1 WO 2000035708A1 SE 9902299 W SE9902299 W SE 9902299W WO 0035708 A1 WO0035708 A1 WO 0035708A1
Authority
WO
WIPO (PCT)
Prior art keywords
damper
piston
adjustment device
arrangement according
gas spring
Prior art date
Application number
PCT/SE1999/002299
Other languages
English (en)
Inventor
Daniel Johansson
Anders Persson
Johan Granman
Original Assignee
Volvo Wheel Loaders Ab
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 Volvo Wheel Loaders Ab filed Critical Volvo Wheel Loaders Ab
Priority to AU30887/00A priority Critical patent/AU3088700A/en
Publication of WO2000035708A1 publication Critical patent/WO2000035708A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/50—Seat suspension devices
    • B60N2/501—Seat suspension devices actively controlled suspension, e.g. electronic control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/50—Seat suspension devices
    • B60N2/502—Seat suspension devices attached to the base of the seat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/50—Seat suspension devices
    • B60N2/505—Adjustable suspension including height adjustment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/50—Seat suspension devices
    • B60N2/506—Seat guided by rods
    • B60N2/507—Parallelogram-like structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/50—Seat suspension devices
    • B60N2/52—Seat suspension devices using fluid means
    • B60N2/525—Seat suspension devices using fluid means using gas

Definitions

  • the invention relates to an arrangement for automatically optimizing the setting of the damping constant of a damper mounted in a -spring mechanism in an underframe of a chair.
  • This spring mechanism is included, together with a system of articulated arms, in the underframe of the chair. Adjustment is made with respect to external factors. These factors can include, but are not limited to, initial and instantaneous loading of the spring mechanism, for example the driver's weight and the speed of the vehicle.
  • a constriction in the damper can be adjusted by hand and it is possible in this way to change the character of the damper.
  • the point of attachment of the damper in the system of articulated arms is displaced to give a modified lever arm and in this way the damping factor is modified.
  • One object of the invention is to make available a system for having at all times an optimum damping constant set in the damper included in a spring mechanism for a chair, where the setting takes place automatically.
  • Another object is for the setting to take account of one or more external factors, such as the driver's weight and the vehicle's speed, vibrations and work mode.
  • Yet another object of the invention is to make available a simple, robust and inexpensive damping arrangement.
  • the damper is made to assume an optimum damping constant for the prevailing conditions by means of an adjustment device whose output signal is controlled on the one hand by the pressure in a gas spring and on the other hand by various relevant external factors.
  • the damping constant of the damper can be modified by connecting the adjustment device and the damper, allowing the pressure in a gas spring to act on the adjustment device, and by the adjustment device assuming at least two different basic positions which give the damper correspondingly different damping constants. These different positions correspond to the vehicle's work mode, for example when the vehicle's speed is over or below 15 km/h.
  • the effect of the pressure in the gas spring creates a fine adjustment with respect to the driver's weight about the basic positions.
  • the advantages of the invention are that driver comfort is good without the driver having to adjust the setting by hand.
  • the invention allows this to be done automatically.
  • the invention takes account of a number of external factors, for example if the surface on which the vehicle is being driven changes.
  • the invention is also simple and robust, which is a great advantage as the type of vehicle using the invention is often driven under extremely demanding external environmental conditions.
  • Fig. 1 shows a diagrammatic outline of the system according to a first embodiment
  • Fig. 2 shows a second embodiment of the system in which an external pressure source has been replaced by a gas spring
  • Fig. 3 shows a third embodiment of the system.
  • a damping arrangement is shown according to a first embodiment for achieving optimum setting of the damping constant in a damper 1 coupled to a chair 5.
  • an adjustment device 7 is acted upon by the pressure in a gas spring 13, and by external pressure via a valve 15. These pressures act on a first piston 9 and a second piston 11 in the adjustment device 7.
  • the first piston 9 is acted upon by the pressure in the gas spring 13 via a line 25.
  • the second piston 11 is acted upon by an external pressure via a connection 37, created by an external pressure source 27 and controlled by the valve 15.
  • the position of the first piston 9 and of the second piston 11 acts directly and indirectly, respectively, on the piston rod 21 which, via a connection 23, for example a wire, acts on the constriction area in the damper 1 and thus on the damping constant.
  • the piston rod 21 is fixed in the first piston 9 and passes through the second piston 11 and out through the cylinder 8. The second piston 11 can thus be displaced on the piston rod 21.
  • the pressure in the gas spring 13 is changed.
  • the pressure becomes low or high, in relative terms, depending on whether a light or heavy person is sitting in the chair 5.
  • the pressure in the gas spring 13 is transmitted via the line 25, for example a hose or a tube, to the positive side 31 of the first piston 9.
  • the iine 25 includes some form of constriction for excluding rapid pressure changes in the gas spring 13.
  • the negative side 33 of the piston 9 is spring-loaded by the spring 35.
  • the spring 35 works between the first piston 9 and the second piston 11.
  • the pressure change in the gas spring 13 is transmitted via the line 25 and moves the first piston 9. The movement is transmitted further via the piston rod 21 and the connection 23 to the damper 1 which assumes a suitable setting in relation to the weight of the person who initiated the pressure change.
  • the damping arrangement according to the invention can advantageously be arranged on an underframe 4 of a chair 5 in a vehicle, for example contractor's equipment such as a wheel-mounted loader or dumper.
  • the underframe 4 can be made up of a four-bar mechanism in which the gas spring 13 and the damper 1 are coupled to one of the articulated arms of the four-bar mechanism.
  • the second piston 11 is acted upon by an external pressure built up by an external pressure source and controlled by the valve 15 and transmitted via the connection 37.
  • the valve 15 is controlled by a control unit 17.
  • Input data to the control unit 17 include various external factors, for example the vehicle's speed or how much the vehicle is vibrating.
  • the second piston 11 must be able to assume at least two different positions 39, 41 depending on the external factors. Stepless adjustment of the piston 11 is possible so as to be able more precisely to adjust the damping constant with respect to external factors.
  • Position 39 means that the second piston 11 is in the right-hand end position according to Fig. 1.
  • Position 41 means that the second piston 11 is- in the left-hand end position according to Fig. 1. Movement between these positions 39, 41 , initiated by a signal from the control unit 17, leads to a modified setting of the damping constant in the damper 1.
  • These positions 39, 41 are basic settings, and the position assumed by the second piston 11 depends on external factors. Movements in the first piston 9 adjust the damping force about these positions with respect to the driver's weight.
  • Position 39 is the starting position for the second piston 11.
  • control unit 17 When the control unit 17 sends a signal to the valve 15 indicating that it is to open, the pressure from the external pressure source 27 will move the piston 11 to position 41. When the valve 15 is closed, the positive side 43 of the piston 11 is drained and the piston 11 assumes position 39 again.
  • the closure is initiated by a signal from the control unit 17, which in turn is controlled by a sensor which measures external factors, such as the vehicle's speed and vibrations or the movement of the chair in relation to the vehicle's cab.
  • Fig. 2 shows a second embodiment of the invention.
  • the pressure in the gas spring 13 is used instead of using the pressure in the external pressure source 27, the pressure in the gas spring 13 is used.
  • the valve 15 is connected to the gas spring 13 via a line 45.
  • Fig. 3 shows a third embodiment of the invention.
  • the adjustment device 7 includes electronic components arranged in such a way that input signals from a pressure sensor 47 and the control unit 17 are converted to an output signal which via the adjustment device 7 is transmitted to a servo 49 which in turn mechanically acts on the damper 1 and in this way changes the damping constant.
  • the components - adjustment device 7, control unit 17, pressure sensor 47 and servo 49 - are joined together via electric lines 51 , 53, 55.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)
  • Vehicle Body Suspensions (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

L'invention se rapporte à un dispositif permettant de régler automatiquement un amortisseur (1) en fonction d'une constante d'amortissement. Ledit amortisseur (1) est intégré à un mécanisme à ressort (3) comportant par ailleurs un ressort à gaz (13) et monté sur le châssis d'un siège (5) qui est de préférence monté sur un véhicule. On effectue le réglage automatique de l'amortisseur en connectant celui-ci au dispositif de réglage (7) de manière à permettre au ressort à gaz (13) d'agir sur le dispositif de réglage (7) susceptible d'adopter deux positions de base différentes qui confèrent à l'amortisseur (1) des constantes d'amortissement correspondantes différentes. Ces positions de base différentes peuvent correspondre, par exemple, à la vitesse du véhicule au-dessus et en-dessous de 15 km/h. L'effet de la pression dans le ressort à gaz (13) permet un réglage fin à proximité des positions de base en fonction du poids du conducteur.
PCT/SE1999/002299 1998-12-15 1999-12-08 Dispositif pour siege WO2000035708A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU30887/00A AU3088700A (en) 1998-12-15 1999-12-08 Arrangement for a chair

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9804329A SE516827C2 (sv) 1998-12-15 1998-12-15 Dämparanordning för en stol
SE9804329-2 1998-12-15

Publications (1)

Publication Number Publication Date
WO2000035708A1 true WO2000035708A1 (fr) 2000-06-22

Family

ID=20413662

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1999/002299 WO2000035708A1 (fr) 1998-12-15 1999-12-08 Dispositif pour siege

Country Status (3)

Country Link
AU (1) AU3088700A (fr)
SE (1) SE516827C2 (fr)
WO (1) WO2000035708A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007056700A1 (de) * 2007-11-24 2009-06-04 Grammer Ag Vorrichtung mit einem Federungssystem sowie Verfahren zur Einstellung eines Federungssystems
WO2011061567A1 (fr) * 2009-11-20 2011-05-26 La Nacion, Ministerio De Defensa, Fuerza Aerea Colombiana Dispositif réducteur de vibrations au niveau du siège des pilotes d'hélicoptères
DE102006045114B4 (de) * 2006-09-25 2012-07-19 Isringhausen Gmbh & Co. Kg Verfahren zur Federung eines luftgefederten Fahrzeugsitzes
US9115781B2 (en) 2009-01-21 2015-08-25 Grammar Ag Device for springing a mass, and method for adjusting and/or operating a fluid spring
CN108412952A (zh) * 2018-05-31 2018-08-17 重庆中铃兆虎机车制造有限公司 三轮车车斗减震装置
EP3388282A1 (fr) * 2017-04-11 2018-10-17 Aguti Produktentwicklung & Design Gmbh Dispositif destiné au réglage en hauteur d'un siège de véhicule

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1055372A (en) * 1964-05-14 1967-01-18 Michel Antoine Emile Vuichard Seat suspension for a tractor and the like
EP0739766A2 (fr) * 1995-04-27 1996-10-30 The Lubrizol Corporation Procédé de contrÔle d'un mouvement utilisant un amortisseur réglable
WO1997010118A1 (fr) * 1995-09-12 1997-03-20 Lord Corporation Systeme d'amortisseur regulable pour siege, et procede de reglage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1055372A (en) * 1964-05-14 1967-01-18 Michel Antoine Emile Vuichard Seat suspension for a tractor and the like
EP0739766A2 (fr) * 1995-04-27 1996-10-30 The Lubrizol Corporation Procédé de contrÔle d'un mouvement utilisant un amortisseur réglable
WO1997010118A1 (fr) * 1995-09-12 1997-03-20 Lord Corporation Systeme d'amortisseur regulable pour siege, et procede de reglage

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006045114B4 (de) * 2006-09-25 2012-07-19 Isringhausen Gmbh & Co. Kg Verfahren zur Federung eines luftgefederten Fahrzeugsitzes
DE102007056700A1 (de) * 2007-11-24 2009-06-04 Grammer Ag Vorrichtung mit einem Federungssystem sowie Verfahren zur Einstellung eines Federungssystems
DE102007056700B4 (de) * 2007-11-24 2012-03-29 Grammer Aktiengesellschaft Vorrichtung mit einem Federungssystem sowie Verfahren zur Einstellung eines Federungssystems
US9115781B2 (en) 2009-01-21 2015-08-25 Grammar Ag Device for springing a mass, and method for adjusting and/or operating a fluid spring
WO2011061567A1 (fr) * 2009-11-20 2011-05-26 La Nacion, Ministerio De Defensa, Fuerza Aerea Colombiana Dispositif réducteur de vibrations au niveau du siège des pilotes d'hélicoptères
CN102858590A (zh) * 2009-11-20 2013-01-02 哥伦比亚国防部空军 直升飞机飞行员座椅中的减振装置
US9061767B2 (en) 2009-11-20 2015-06-23 La Nacion, Ministerio De Defensa Vibrations reduction device in the chairs of helicopter pilots
EP3388282A1 (fr) * 2017-04-11 2018-10-17 Aguti Produktentwicklung & Design Gmbh Dispositif destiné au réglage en hauteur d'un siège de véhicule
CN108412952A (zh) * 2018-05-31 2018-08-17 重庆中铃兆虎机车制造有限公司 三轮车车斗减震装置

Also Published As

Publication number Publication date
SE9804329L (sv) 2000-06-16
SE9804329D0 (sv) 1998-12-15
SE516827C2 (sv) 2002-03-12
AU3088700A (en) 2000-07-03

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