WO2004098919A1 - Shock absorber for height adjustment - Google Patents

Shock absorber for height adjustment Download PDF

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Publication number
WO2004098919A1
WO2004098919A1 PCT/SE2004/000427 SE2004000427W WO2004098919A1 WO 2004098919 A1 WO2004098919 A1 WO 2004098919A1 SE 2004000427 W SE2004000427 W SE 2004000427W WO 2004098919 A1 WO2004098919 A1 WO 2004098919A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
shock absorber
cylinder
spring
pressure
Prior art date
Application number
PCT/SE2004/000427
Other languages
French (fr)
Inventor
Sven Kindblom
Original Assignee
Sven Kindblom
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 Sven Kindblom filed Critical Sven Kindblom
Priority to US10/547,754 priority Critical patent/US20060196741A1/en
Publication of WO2004098919A1 publication Critical patent/WO2004098919A1/en

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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
    • F16F9/064—Units characterised by the location or shape of the expansion chamber
    • F16F9/065—Expansion chamber provided on the upper or lower end of a damper, separately there from or laterally on the damper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
    • B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
    • B60G15/061—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper with a coil spring being mounted inside the damper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/06—Characteristics of dampers, e.g. mechanical dampers
    • B60G17/08—Characteristics of fluid dampers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K25/00—Axle suspensions
    • B62K25/04—Axle suspensions for mounting axles resiliently on cycle frame or fork
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/30—Spring/Damper and/or actuator Units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/30—Spring/Damper and/or actuator Units
    • B60G2202/32—The spring being in series with the damper and/or actuator
    • B60G2202/322—The spring being in series with the damper and/or actuator the damper being controllable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K25/00—Axle suspensions
    • B62K25/04—Axle suspensions for mounting axles resiliently on cycle frame or fork
    • B62K2025/045—Suspensions with ride-height adjustment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K25/00—Axle suspensions
    • B62K25/04—Axle suspensions for mounting axles resiliently on cycle frame or fork
    • B62K2025/048—Axle suspensions for mounting axles resiliently on cycle frame or fork with suspension manual adjustment details

Definitions

  • the present invention is concerned with a shock absorber according to the preamble of claim 1.
  • the height control is accomplished in such a way that oil or gas is respectively pumped into and allowed to flow back from a cylinder of a shock absorber by means of a pump provided on the motorcycle.
  • the shock absorber piston rod will glide to rise or lower the frame of the motorcycle via a suitable link connection to the rear wheel.
  • the medium pumped in is acting "behind" the shock absorber piston resulting in a direct influence on the characteristics of the spring of the shock absorber.
  • a shock absorber having a height controlling function that allows an automated and instantaneous adjustment of the height position of the motorcycle only by means of the load of the motorcycle, i.e. the weight of the driver, and without influencing the spring characteristics of the shock absorber spring.
  • FIG. 1 diagrammatically shows the invention in section and operating with a pulled shock absorber piston
  • FIG. 2 shows the invention correspondingly but having a pushed shock absorber piston.
  • the shock absorber piston generally comprises a cylinder 1 and a piston 2 having a piston rod 3.
  • the shock absorber piston 2 is designed to have the ability to shock-absorbingly move back and forth in the oil-filled cylinder
  • a separating piston 4 is arranged ir embodiment shown in FIG. 1, the separating piston 4 is sealing slidably against the cylinder wall and against the piston rod 3 that runs through the separating piston.
  • a control chamber 6 is formed between the left end portion 5 of the cylinder 1, which end portion 5 is also sealed against the piston rod 3, and the separating piston 4.
  • control chamber 6 is in communication with a gas spring 8 which is known per se and is operating by oil or other incompressible medium.
  • Line 7 is provided with a shut-off valve 9. Further, a compression spring 10 is arranged acting, on the one hand, against shock absorber piston 2 and, on the other hand, against separating piston 4.
  • Numeral 13 designates an accumulator which is present at shock absorbers for the purpose of their normal function and will therefore not be further described herein.
  • the pressure in the gas spring 8 is so controlled that when the motorcycle is unloaded and the valve 9 is open, the pressure is sufficiently large for pushing the separating piston 4 to the right in FIG. 1, pushing piston 2 and piston rod 3 via spring 10 likewise to the right in FIG. 1.
  • the motorcycle thereby acquires its highest ground clearance. If the driver when sitting on the motorcycle wishes to lower the clearance, the valve 9 is opened. Due to the increasing load from the driver on the motorcycle, piston 2 and rod 3 will.be moved to the left in FIG. 1. Spring 10 now exerts a pressure on separating piston 4 to the left in FIG. 1.
  • FIG. 2 shows a section corresponding to that of FIG. 1 but differing by the piston and rod, instead for being pulled against the action of spring 10 according to FIG. 1, are pushed against the spring that accordingly acts between the shock ab separating piston 4, which is now located to the right in FIG. 2 and which defines the control chamber 6 together with the other end of the cylinder. Thereby the requirement that the piston rod should run through the separating piston 4 is eliminated. Otherwise, also this embodiment functions as that already described in connection with FIG. 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Axle Suspensions And Sidecars For Cycles (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

A shock absorber for controlling the height of vehicles, comprising a cylinder (1), a shock absorber piston (2) including a piston rod (3) in a known manner being slidably mounted in the cylinder and having an end opposite to the piston extending sealingly through a first end (5) of the cylinder, a second end of which is closed, and a shock absorber spring (10). Characterizing is that the shock absorber spring (10) is arranged between the shock absorber piston (2) and a separating piston (4) located at an end of the cylinder (1), the separating piston (4) being sealingly slidable in relation to the cylinder wall and, together with the end of the cylinder, forming a closed control chamber (6), that a gas spring (8) known per se is connected to the control chamber (6) via (7) an shut-off valve (9) and that, when a certain load is acting on the piston rod (3) and when the shut-off valve (9) is open, the pressure from the gas spring (8) acting on the separating piston (4) is higher than the pressure from the spring (10) on the separating piston (4), and when a larger load is acting on the piston (3) and thereby on the spring (10) acting against the separating piston (4), the pressure in the control chamber (6) is higher than the pressure in the gas spring (8).

Description

Shock absorber for height adjustment.
The present invention is concerned with a shock absorber according to the preamble of claim 1.
In many cases there is a need for enabling in a very easy manner the adjustment of the height of the vehicle over the ground - the road clearance - particularly for motorcycles. The following explanation of the invention is therefore concerned with the height adjustment of a motorcycle.
It is known to adjust or control the height above the ground of motorcycles. The height control is accomplished in such a way that oil or gas is respectively pumped into and allowed to flow back from a cylinder of a shock absorber by means of a pump provided on the motorcycle. Thereby, the shock absorber piston rod will glide to rise or lower the frame of the motorcycle via a suitable link connection to the rear wheel. The medium pumped in is acting "behind" the shock absorber piston resulting in a direct influence on the characteristics of the spring of the shock absorber.
Another way to control the height is simply by screwing on a piston rod arranged for that purpose on the shock absorber. These both systems are laborious and require time- consuming effort that cannot be made instantaneously.
By the present invention, as defined in the characterizing part of claim 1 , there is obtained a shock absorber having a height controlling function that allows an automated and instantaneous adjustment of the height position of the motorcycle only by means of the load of the motorcycle, i.e. the weight of the driver, and without influencing the spring characteristics of the shock absorber spring.
Exemplary embodiments of the invention will be closer described with reference to the drawing, wherein
FIG. 1 diagrammatically shows the invention in section and operating with a pulled shock absorber piston; and
FIG. 2 shows the invention correspondingly but having a pushed shock absorber piston.
In a known manner, the shock absorber piston generally comprises a cylinder 1 and a piston 2 having a piston rod 3. In a conventional manner, the shock absorber piston 2 is designed to have the ability to shock-absorbingly move back and forth in the oil-filled cylinder According to the invention, a separating piston 4 is arranged ir embodiment shown in FIG. 1, the separating piston 4 is sealing slidably against the cylinder wall and against the piston rod 3 that runs through the separating piston. In FIG. 1, a control chamber 6 is formed between the left end portion 5 of the cylinder 1, which end portion 5 is also sealed against the piston rod 3, and the separating piston 4. Through a line 7, control chamber 6 is in communication with a gas spring 8 which is known per se and is operating by oil or other incompressible medium. Line 7 is provided with a shut-off valve 9. Further, a compression spring 10 is arranged acting, on the one hand, against shock absorber piston 2 and, on the other hand, against separating piston 4. Numeral 13 designates an accumulator which is present at shock absorbers for the purpose of their normal function and will therefore not be further described herein.
The pressure in the gas spring 8 is so controlled that when the motorcycle is unloaded and the valve 9 is open, the pressure is sufficiently large for pushing the separating piston 4 to the right in FIG. 1, pushing piston 2 and piston rod 3 via spring 10 likewise to the right in FIG. 1. The motorcycle thereby acquires its highest ground clearance. If the driver when sitting on the motorcycle wishes to lower the clearance, the valve 9 is opened. Due to the increasing load from the driver on the motorcycle, piston 2 and rod 3 will.be moved to the left in FIG. 1. Spring 10 now exerts a pressure on separating piston 4 to the left in FIG. 1. The situation is now that the pressure of gas spring 8 is so controlled that the increasing pressure in control chamber 6 due to the pressure of spring 10 on separating piston 4 is sufficiently large to overcome the action from the gas spring in the control chamber 6, resulting that piston 2 and rod 3 can be displaced to the left in FIG. 1. This position of the piston rod implies that the motorcycle acquires the lowest ground clearance. If the valve 9 is closed in this position, the motorcycle will maintain this ground clearance. As soon as the motorcycle is unloaded and valve 9 is open, for example by the driver putting his/her feet on the ground and raising, the motorcycle will follow after, i.e. rise to its previous highest ground clearance. Different height positions can be set by closing valve 9 at the acquired height position. In FIG. 1 , numeral 11 indicates an angled link arm to be connected to the wheel suspension, and numeral 12 indicates an articulated joint to the motorcycle frame. 11 and 12 constitute expedient measures obvious for the skilled person outside the scope of the invention.
It is to be pointed out that the movements of the separating piston 4 are here relatively small in order to obtain the desired function. It is of course also understood that the spring and shock dampening functions all the time works for different settings of the height positions of the motorcycle, i.e. the positions of the separating piston 4.
FIG. 2 shows a section corresponding to that of FIG. 1 but differing by the piston and rod, instead for being pulled against the action of spring 10 according to FIG. 1, are pushed against the spring that accordingly acts between the shock ab separating piston 4, which is now located to the right in FIG. 2 and which defines the control chamber 6 together with the other end of the cylinder. Thereby the requirement that the piston rod should run through the separating piston 4 is eliminated. Otherwise, also this embodiment functions as that already described in connection with FIG. 1.
It is to be understood that of course also other types of vehicles than motorcycles can make use of the principle described above according to the invention.

Claims

Claims
1. A shock absorber for controlling the height of vehicles, comprising a cylinder (1), a shock absorber piston (2) including a piston rod (3) in a known manner being slidably mounted in the cylinder and having an end opposite to the piston extending sealingly through a first end (5) of the cylinder, a second end of which is closed, and a shock absorber spring (10), characterized in that the shock absorber spring (10) is arranged between the shock absorber piston (2) and a separating piston (4) located at an end of the cylinder (1), the separating piston (4) being sealingly slidable in relation to the cylinder wall and, together with the end of the cylinder, forming a closed control chamber (6), in that a gas spring (8) known per se is connected to the control chamber (6) via (7) a shut-off valve (9), and in that, when a certain load is acting on the piston rod (3) and when the shut-off valve (9) is open, the pressure from the gas spring (8) acting on the separating piston (4) is higher than the pressure from the spring (10) on the separating piston (4), and when a larger load is acting on the piston (3) and thereby on the spring (10) acting against the separating piston (4), the pressure in the control chamber (6) is higher than the pressure in the gas spring (8).
2. The shock absorber according to claim 1, characterized in that the separating piston (4) is located at said first end of the cylinder and is sealingly slidable in relation to the piston rod (3) running sealingly through the separating piston (4).
3. The shock absorber according to claim 1, characterized in that the separating piston (4) is located at said second end of the cylinder.
4. The shock absorber according to any of claims 1-3, characterized in that it is provided on a motorcycle.
PCT/SE2004/000427 2003-03-25 2004-03-23 Shock absorber for height adjustment WO2004098919A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/547,754 US20060196741A1 (en) 2003-03-25 2004-03-23 Shock absorber for height adjustment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0300807-5 2003-03-25
SE0300807A SE523093C2 (en) 2003-03-25 2003-03-25 Shock absorber for motor vehicle suspension, has gas spring connected to control chamber in cylinder with partition valve, spring and piston

Publications (1)

Publication Number Publication Date
WO2004098919A1 true WO2004098919A1 (en) 2004-11-18

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ID=20290767

Family Applications (1)

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PCT/SE2004/000427 WO2004098919A1 (en) 2003-03-25 2004-03-23 Shock absorber for height adjustment

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SE (1) SE523093C2 (en)
WO (1) WO2004098919A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011000990A1 (en) * 2009-07-02 2011-01-06 Rabassa Innova, S.L. Double-body hydraulic shock-absorber device
EP2349751A4 (en) * 2008-10-20 2012-03-21 Bae Systems Haegglunds Ab Wheel suspension for wheeled vehicles
EP4067691A1 (en) * 2021-03-31 2022-10-05 Renault s.a.s Hydraulic damper for suspension of a motor vehicle with pneumatic cylinder function

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013000338A1 (en) * 2013-01-11 2014-07-17 Mann + Hummel Gmbh pulsation dampers
JP6681767B2 (en) * 2016-03-31 2020-04-15 株式会社ショーワ Vehicle height adjustment device
IT202100008522A1 (en) 2021-04-06 2022-10-06 Umbria Kinetics Srl OSCILLATION SYSTEM OF THE SWINGARM OF A WHEEL WITH RESPECT TO THE FRAME OF A VEHICLE.
CN113428002B (en) * 2021-08-02 2024-02-20 山东大学 Speed reducer damping device for electric automobile

Citations (7)

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GB764594A (en) * 1954-01-28 1956-12-28 Andre Grimaud Improvements relating to suspension systems
GB841410A (en) * 1957-03-30 1960-07-13 Daimler Benz Ag Improvements relating to vehicle shock absorbers
US4367882A (en) * 1980-04-11 1983-01-11 Battelle Memorial Institute Suspension apparatus
DE3939485A1 (en) * 1989-11-29 1990-04-05 Rainer Dipl Ing Daumann Motor vehicle shock absorber - has device to increase damping force as load on vehicle increases
US5058868A (en) * 1986-12-30 1991-10-22 Jacques Sirven Shock absorber with load compensation
US5476161A (en) * 1990-07-24 1995-12-19 University Of Huddersfield Higher Education Corporation Self-energizing, self-levelling controllable damper unit for a vehicle suspension
US20020111334A1 (en) * 2000-08-29 2002-08-15 Ekwuribe Nnochiri Nkem 5-ASA derivatives having anti-inflammatory and antibiotic activity and methods of treating diseases therewith

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US4076225A (en) * 1976-11-15 1978-02-28 Enidine Incorporated Adjustable energy absorbing device providing linear deceleration
FR2601097B1 (en) * 1986-07-07 1990-07-06 Messier Hispano Bugatti Sa SHOCK ABSORBER WITH RESIDUAL TRAVEL ADAPTATION
JPH035224A (en) * 1989-05-31 1991-01-11 Chuo Spring Co Ltd Stabilizing device
EP0427269B1 (en) * 1989-11-10 1994-05-04 Suzuki Kabushiki Kaisha Motorcycle having body height adjusting mechanism
US6276693B1 (en) * 1998-11-16 2001-08-21 Delphi Technologies, Inc. Roll control system for a motor vehicle
JP2001010324A (en) * 1999-06-30 2001-01-16 Tokico Ltd Suspension control device
JP2001280392A (en) * 2000-03-30 2001-10-10 Sakae Giken:Kk Wheel suspension type front fork
US20020121416A1 (en) * 2001-02-19 2002-09-05 Yohei Katayama Hydraulic cylinder apparatus
US6698729B2 (en) * 2001-06-15 2004-03-02 Mark A. Popjoy Gas spring having a controllable output force
US7240906B2 (en) * 2002-12-04 2007-07-10 Daimlerchrysler Corporation Hydro-pneumatic suspension system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB764594A (en) * 1954-01-28 1956-12-28 Andre Grimaud Improvements relating to suspension systems
GB841410A (en) * 1957-03-30 1960-07-13 Daimler Benz Ag Improvements relating to vehicle shock absorbers
US4367882A (en) * 1980-04-11 1983-01-11 Battelle Memorial Institute Suspension apparatus
US5058868A (en) * 1986-12-30 1991-10-22 Jacques Sirven Shock absorber with load compensation
DE3939485A1 (en) * 1989-11-29 1990-04-05 Rainer Dipl Ing Daumann Motor vehicle shock absorber - has device to increase damping force as load on vehicle increases
US5476161A (en) * 1990-07-24 1995-12-19 University Of Huddersfield Higher Education Corporation Self-energizing, self-levelling controllable damper unit for a vehicle suspension
US20020111334A1 (en) * 2000-08-29 2002-08-15 Ekwuribe Nnochiri Nkem 5-ASA derivatives having anti-inflammatory and antibiotic activity and methods of treating diseases therewith

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2349751A4 (en) * 2008-10-20 2012-03-21 Bae Systems Haegglunds Ab Wheel suspension for wheeled vehicles
WO2011000990A1 (en) * 2009-07-02 2011-01-06 Rabassa Innova, S.L. Double-body hydraulic shock-absorber device
ES2364377A1 (en) * 2009-07-02 2011-09-01 Rabassa Innova, S.L. Double-body hydraulic shock-absorber device
EP4067691A1 (en) * 2021-03-31 2022-10-05 Renault s.a.s Hydraulic damper for suspension of a motor vehicle with pneumatic cylinder function
FR3121490A1 (en) * 2021-03-31 2022-10-07 Renault S.A.S. MOTOR VEHICLE SUSPENSION HYDRAULIC SHOCK ABSORBER WITH PNEUMATIC CYLINDER FUNCTION

Also Published As

Publication number Publication date
US20060196741A1 (en) 2006-09-07
SE0300807L (en) 2004-03-30
SE523093C2 (en) 2004-03-30
SE0300807D0 (en) 2003-03-25

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