WO2024053513A1 - Système de suspension - Google Patents

Système de suspension Download PDF

Info

Publication number
WO2024053513A1
WO2024053513A1 PCT/JP2023/031515 JP2023031515W WO2024053513A1 WO 2024053513 A1 WO2024053513 A1 WO 2024053513A1 JP 2023031515 W JP2023031515 W JP 2023031515W WO 2024053513 A1 WO2024053513 A1 WO 2024053513A1
Authority
WO
WIPO (PCT)
Prior art keywords
leaf spring
operating member
suspension system
actuator
vehicle body
Prior art date
Application number
PCT/JP2023/031515
Other languages
English (en)
Japanese (ja)
Inventor
孝悦 金澤
拓斗 鈴木
信次 飯野
才司 上津原
Original Assignee
日本発條株式会社
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 日本発條株式会社 filed Critical 日本発條株式会社
Publication of WO2024053513A1 publication Critical patent/WO2024053513A1/fr

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/02—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only
    • B60G11/08—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only arranged substantially transverse to the longitudinal axis of the vehicle
    • 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
    • B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
    • B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • B60G21/055—Stabiliser bars

Definitions

  • the present invention relates to a suspension system.
  • Suspension systems have been known in the past that are installed in vehicles and have a buffering function that prevents vibrations caused by uneven road surfaces from being transmitted to the vehicle body through the wheels, improving ride comfort and stability of vehicle handling. .
  • leaf spring type suspension systems are configured using leaf springs (see, for example, Patent Document 1).
  • the leaf spring is attached to an arm that supports the wheels and a member that supports the vehicle body. Specifically, the leaf spring is attached to a right arm that supports the right wheel, a left arm that supports the left wheel, and a member that supports the vehicle body. Further, in Patent Document 1, the roll rigidity is adjusted by changing the shape of a leaf spring using a pair of left and right actuators, thereby adjusting the vehicle height and controlling the attitude of the vehicle body.
  • the present invention has been made in view of the above, and an object of the present invention is to provide a suspension system that can adjust roll rigidity while suppressing an increase in the number of parts.
  • a suspension system includes a leaf spring extending in a band shape, a first arm supporting one end of the leaf spring, and the other end of the leaf spring. a second arm that supports the first and second arms; a member that is connected to the member or the vehicle body structure; and an adjustment that grips a part of the leaf spring and changes the shape of the leaf spring; It is characterized by comprising a device.
  • the adjustment device includes a movement member that has a rotation center and grips a part of the leaf spring, and a movement member that rotates the movement member around the rotation center. and an actuator for controlling the actuator, and further comprising a control device for controlling the actuator.
  • the suspension system according to the present invention is characterized in that, in the above invention, the operating member is located between the member and the leaf spring.
  • suspension system according to the present invention is characterized in that, in the above invention, an elastic member is provided between the operating member and the leaf spring.
  • the suspension system according to the present invention is characterized in that, in the above invention, the operating member supports two locations on opposite sides of the center portion of the leaf spring in the longitudinal direction.
  • the roll rigidity can be adjusted while suppressing an increase in the number of parts.
  • FIG. 1 is a diagram schematically showing the configuration of a suspension system according to an embodiment of the present invention.
  • FIG. 2 is a diagram schematically showing the configuration of main parts of a suspension system according to an embodiment of the present invention.
  • FIG. 3 is a diagram for explaining a state when the vehicle body rolls.
  • FIG. 4 is a diagram for explaining the state after roll rigidity adjustment.
  • FIG. 5 is a flowchart illustrating the flow of control of the actuator by the control device.
  • FIG. 6 is a diagram schematically showing the configuration of main parts of a suspension system according to a modification of the present invention.
  • FIG. 1 is a diagram schematically showing the configuration of a suspension system according to an embodiment of the present invention.
  • FIG. 2 is a diagram schematically showing the configuration of main parts of a suspension system according to an embodiment of the present invention.
  • the suspension system 1 is provided in a vehicle, for example, and is interposed between a right wheel 101, a left wheel 102, and a vehicle body, and suppresses vibrations transmitted from the wheels from being transmitted to the vehicle body. It is a leaf spring type suspension.
  • the suspension system 1 includes a right arm 11 that supports the right wheel 101, a left arm 12 that supports the left wheel 102, a member 13 that supports the vehicle body, and elastically deforms in response to vibrations from the wheels 101 and 102. It includes a leaf spring 14 and an adjustment device 15 that adjusts roll rigidity by applying a load to the leaf spring 14.
  • the suspension system 1 is attached to the vehicle body via a member 13, and absorbs vibrations transmitted from the wheels depending on the unevenness of the road surface.
  • the wheels are supported by arms via knuckles, disc rotors, and the like.
  • the left-right direction is the left-right direction of the vehicle when it is attached to the vehicle body, and corresponds to the longitudinal direction of the suspension system 1
  • the direction perpendicular to the page corresponds to the front-rear direction of the vehicle
  • the up-down direction is the direction of the vehicle. Corresponds to the vertical direction of the vehicle.
  • the right arm 11 grips one end of the leaf spring 14 and is connected to the member 13 at the end opposite to the wheel 101 side.
  • the right arm 11 grips the leaf spring 14 with a link or the like.
  • the left arm 12 grips the other end of the leaf spring 14 and is connected to the member 13 at the end opposite to the wheel 102 side.
  • the left arm 12 grips the leaf spring 14 with a link or the like.
  • the member 13 supports the vehicle body and is interposed between the vehicle body, wheels 101, 102, right arm 11, and left arm 12.
  • the member 13 has a main body portion 131 that connects to the right arm 11 and the left arm 12, and a first support portion 132 and a second support portion 133 that extend in the front-back direction and support the arms, respectively.
  • the main body portion 131 extends in the left-right direction (left-right direction of the vehicle body), and has both ends bent downward.
  • the first support portion 132 supports the right arm 11 rotatably around a rotation axis extending in the front-rear direction.
  • the second support portion 133 supports the left arm 12 rotatably around a rotation axis extending in the front-rear direction.
  • the leaf spring 14 has a band shape and extends in the left-right direction.
  • the leaf spring 14 is formed using, for example, fiber reinforced plastics (FRP), metal, or resin.
  • the leaf spring may be made of a single plate, or may be made of a plurality of plate materials stacked together.
  • FRP fiber reinforced plastics
  • an operating member 151 which will be described later, is provided between the member 13 and the leaf spring 14, and is housed in a space formed by the member 13 and the leaf spring 14.
  • the adjustment device 15 includes an operating member 151, a rotating shaft 152, and an actuator 153.
  • the operating member 151 grips the leaf spring 14 and is rotatable around a rotating shaft 152 .
  • the leaf spring 14 passes through the operating member 151 .
  • the operating member 151 grips the leaf spring 14 at two different locations in the longitudinal direction. In this embodiment, the operating member 151 supports two locations located on opposite sides of the longitudinal center of the leaf spring 14 . Note that the gripping position and the number of gripping locations can be set as appropriate.
  • An elastic member 154 is provided between the operating member 151 and the leaf spring 14 (see FIG. 2).
  • the elastic member 154 is fixed to the inner wall of the operating member 151, for example, and suppresses interference between the operating member 151 and the leaf spring 14.
  • the rotating shaft 152 extends in the front-rear direction and is rotated by driving the actuator 153.
  • An operating member 151 is fixed to the rotating shaft 152. Therefore, the rotation of the rotating shaft 152 causes the operating member 151 to rotate.
  • the operating member 151 rotates about a rotating shaft 152 as the center of rotation. That is, the operating member 151 has a rotation center corresponding to the central axis of the rotating shaft 152.
  • the actuator 153 is connected to the rotating shaft 152 and is electrically connected to the control device 20. Actuator 153 rotates rotating shaft 152 under the control of control device 20 .
  • the actuator 153 is configured using, for example, a motor, a hydraulic cylinder, a ball screw, a hydraulic bellows, a pneumatic device, a vane pump, or the like.
  • FIG. 3 is a diagram for explaining a state when the vehicle body rolls.
  • FIG. 4 is a diagram for explaining the state after roll rigidity adjustment.
  • the adjustment device 15 drives the actuator 153 to rotate the operating member 151 in the same direction as the rotation direction of the vehicle body 103 (arrow Y B ).
  • the rotation of the operating member 151 changes the balance of the load on the leaf spring 14, adjusts the roll stiffness, and reduces the roll of the vehicle body 103 (see FIG. 4).
  • the control device 20 controls the operation of the actuator 153 of the adjustment device 15. Further, the control device 20 receives detection signals from various sensors provided in the vehicle (here, a vehicle speed sensor 21, a stroke sensor 22, a gyro sensor 23, and a steering angle sensor 24).
  • the control device 20 includes a processor such as a CPU (Central Processing Unit), a processor such as various arithmetic circuits such as an ASIC (Application Specific Integrated Circuit) that executes a specific function, and a volatile memory that stores each tumor control program. It is configured using nonvolatile memory, such as RAM (Random Access Memory) and ROM (Read Only Memory).
  • the vehicle speed sensor 21 outputs a signal value indicating the speed of the vehicle.
  • the stroke sensor 22 outputs a signal value indicating the stroke amount of the suspension.
  • the gyro sensor 23 outputs a detection signal for calculating a detection value indicating the inclination of the vehicle body.
  • the gyro sensor 23 is configured using, for example, a six-axis inertial sensor including three axes orthogonal to each other and an angular velocity of each axis.
  • the steering angle sensor 24 outputs a signal value indicating the steering angle of the steering wheel of the vehicle.
  • FIG. 5 is a flowchart illustrating the flow of control of the actuator by the control device.
  • the control device 20 acquires the traveling speed of the vehicle (step S101). At this time, the control device 20 obtains the traveling speed by obtaining a signal value from the vehicle speed sensor 21.
  • the control device 20 determines whether the acquired traveling speed is greater than a preset threshold (step S102).
  • the threshold value is set based on the driving speed at which steering wheel operation can affect vehicle body roll.
  • the control device 20 determines that the traveling speed is less than or equal to the threshold value (step S102: No)
  • the control device 20 moves to step S104.
  • the control device 20 determines that the traveling speed is greater than the threshold (step S102: Yes)
  • the process proceeds to step S103.
  • step S103 the control device 20 calculates the operation target value of the actuator 153 based on the output values output by the stroke sensor 22 and the gyro sensor 23, respectively. After calculating the operation target value, the control device 20 moves to step S105.
  • the operation target value is a value indicating the rotation direction and rotation amount of the rotation shaft 152 rotated by the actuator 153. At this time, the rotation direction is distinguished, for example, by the positive or negative value of the value.
  • step S104 the control device 20 calculates the operation target value of the actuator 153 based on the output values output by the stroke sensor 22, the gyro sensor 23, and the steering angle sensor 24, respectively. After calculating the operation target value, the control device 20 moves to step S105.
  • step S105 the control device 20 drives the actuator 153 in accordance with the operation target value to rotate the rotation shaft 152. This rotation of the rotating shaft 152 causes the operating member 151 to rotate, and the roll rigidity is adjusted.
  • the rotating shaft 152 rotated by the drive of the actuator 153 rotates the operating member 151 that grips the leaf spring 14, thereby adjusting the roll rigidity.
  • the operating member 151 since the operating member 151 is housed within the member 13, it is possible to suppress the vehicle from increasing in size due to the arrangement of the operating member 151.
  • FIG. 6 is a diagram schematically showing the configuration of main parts of a suspension system according to a modification of the present invention.
  • the modified example includes an adjustment device 15A instead of the adjustment device 15 according to the embodiment described above. Since the other components are the same as those in the embodiment, their explanation will be omitted.
  • the adjustment device 15A includes an operating member 151, a rotating shaft 152, and an actuator 155.
  • the operating member 151 grips the leaf spring 14 and is rotatable around the rotating shaft 152.
  • the leaf spring 14 passes through the operating member 151 .
  • the operating member 151 grips the leaf spring 14 at two different locations in the longitudinal direction. Note that the gripping position and the number of gripping locations can be set as appropriate. Further, the operating member 151 is provided with an elastic member 154 in the hollow portion.
  • the actuator 155 is electrically connected to the control device 20 (see FIG. 1). Further, the actuator 155 has a control shaft 155a that comes into contact with the operating member 151, and a drive section. Under the control of the control device 20 , the actuator 155 moves the control shaft 155 a back and forth to contact the operating member 151 , and rotates the operating member 151 around the rotating shaft 152 .
  • a motor, a hydraulic cylinder, a ball screw, a hydraulic bellows, a pneumatic device, etc. are used, for example.
  • the actuator 155 is driven to rotate the operating member 151 that grips the leaf spring 14 to adjust the roll rigidity. Stiffness can be adjusted.
  • a configuration may be adopted in which the elastic member 154 is not included. At this time, from the viewpoint of suppressing displacement of the leaf spring 14 and preventing damage due to interference between the leaf spring 14 and the operating member 151, a configuration including the elastic member 154 is preferable.
  • the adjustment devices 15 and 15A may be connected to a vehicle body structure other than the member 13. good.
  • the present invention may include various embodiments not described herein, and various design changes may be made without departing from the technical idea specified by the claims. is possible.
  • the suspension system according to the present invention is suitable for adjusting roll rigidity while suppressing an increase in the number of parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

Un système de suspension selon la présente invention comprend un ressort à lames s'étendant sous forme de bande, un premier bras qui supporte une extrémité du ressort à lames, un second bras qui supporte l'autre extrémité du ressort à lames, un élément qui relie les premier et second bras, et un dispositif de réglage qui est relié à l'élément ou à une structure de corps et saisit une partie du ressort à lames pour modifier la forme du ressort à lames.
PCT/JP2023/031515 2022-09-09 2023-08-30 Système de suspension WO2024053513A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022143758A JP2024039305A (ja) 2022-09-09 2022-09-09 懸架システム
JP2022-143758 2022-09-09

Publications (1)

Publication Number Publication Date
WO2024053513A1 true WO2024053513A1 (fr) 2024-03-14

Family

ID=90190952

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/031515 WO2024053513A1 (fr) 2022-09-09 2023-08-30 Système de suspension

Country Status (2)

Country Link
JP (1) JP2024039305A (fr)
WO (1) WO2024053513A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0679610U (ja) * 1993-04-30 1994-11-08 三菱自動車工業株式会社 横置きリ−フスプリング式サスペンション装置
US5873581A (en) * 1992-08-17 1999-02-23 Yale; Donald M. Truck steering stabilizer
JP2001130234A (ja) * 1999-11-09 2001-05-15 Hironaka Nonogaki 車高調整式自動車、車高調整装置及びシャックル
DE102010022895A1 (de) * 2010-06-07 2011-12-08 Schaeffler Technologies Gmbh & Co. Kg Einrichtung für ein Fahrwerk eines Kraftfahrzeuges
JP2022032361A (ja) * 2020-08-11 2022-02-25 日本発條株式会社 懸架装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5873581A (en) * 1992-08-17 1999-02-23 Yale; Donald M. Truck steering stabilizer
JPH0679610U (ja) * 1993-04-30 1994-11-08 三菱自動車工業株式会社 横置きリ−フスプリング式サスペンション装置
JP2001130234A (ja) * 1999-11-09 2001-05-15 Hironaka Nonogaki 車高調整式自動車、車高調整装置及びシャックル
DE102010022895A1 (de) * 2010-06-07 2011-12-08 Schaeffler Technologies Gmbh & Co. Kg Einrichtung für ein Fahrwerk eines Kraftfahrzeuges
JP2022032361A (ja) * 2020-08-11 2022-02-25 日本発條株式会社 懸架装置

Also Published As

Publication number Publication date
JP2024039305A (ja) 2024-03-22

Similar Documents

Publication Publication Date Title
US6688620B2 (en) Vehicle suspension with camber control
US10639953B2 (en) Automatic tilting vehicle
CN108025784B (zh) 车辆
JP4460831B2 (ja) 車両ホイールのサスペンションシステム
JP5946844B2 (ja) 移動体
JP2003002024A (ja) キャンバ角変化を許容するサスペンション装置
JP4844026B2 (ja) 車両用サスペンション装置
US20180222276A1 (en) Automatic tilting vehicle
JP5151307B2 (ja) サスペンション
WO2024053513A1 (fr) Système de suspension
JP2009132378A (ja) 車両及び制御装置
KR20220068548A (ko) 독립 현가 시스템
JP2006273070A (ja) 可変スタビライザ
JP2006347337A (ja) 自動車のリヤサスペンション装置
JP5092778B2 (ja) 車両
JP2009184540A5 (fr)
WO2018180719A1 (fr) Dispositif de commande de véhicule
JPH07257132A (ja) 車両用懸架装置
JP3209467B2 (ja) 自動車用後輪サスペンション装置
WO2023145321A1 (fr) Véhicule inclinable
JP2019156316A (ja) 自動傾斜車両
JPH0253622A (ja) 車両のサスペンション
JP2009529449A (ja) 可変キャンバ方式懸架装置を搭載した車両
KR20070064992A (ko) 차량용 능동제어 현가장치의 횡 방향 유격 차단 구조를갖는 토우제어장치
JP2009090972A (ja) 制御装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23863051

Country of ref document: EP

Kind code of ref document: A1