WO2024053513A1 - Suspension system - Google Patents

Suspension system Download PDF

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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
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WO
WIPO (PCT)
Prior art keywords
leaf spring
operating member
suspension system
actuator
vehicle body
Prior art date
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PCT/JP2023/031515
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French (fr)
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
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Publication of WO2024053513A1 publication Critical patent/WO2024053513A1/en

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    • 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.

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

Abstract

A suspension system according to the present invention comprises a plate spring extending in band form, a first arm that supports one end of the plate spring, a second arm that supports the other end of the plate spring, a member that connects the first and second arms, and an adjustment device that connects to the member or a body structure and grasps part of the plate spring to change the shape of the plate spring.

Description

懸架システムsuspension system
　本発明は、懸架システムに関するものである。 The present invention relates to a suspension system.
　従来、車両等に設けられ、路面の凹凸による振動が車輪を経て車体に伝わらないようにする緩衝機能を有し、車両の乗り心地や操縦の安定性などを向上させる懸架システムが知られている。懸架システムのうち、リーフスプリング式の懸架システムは、板ばねを用いて構成される（例えば、特許文献１を参照）。 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. . Among suspension systems, leaf spring type suspension systems are configured using leaf springs (see, for example, Patent Document 1).
　板ばねは、車輪を支持するアームと、車体を支持するメンバーとに取り付けられる。具体的に、板ばねは、右側の車輪を支持する右アーム、左側の車輪を支持する左アーム、車体を支持するメンバーに取り付けられる。また、特許文献１では、左右一対のアクチュエータによって板ばねの形状を変化させることによりロール剛性を調整して、車高の調整や、車体の姿勢制御を行っている。 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.
特開平４－１２１２１５号公報Japanese Patent Application Publication No. 4-121215
　しかしながら、特許文献１のように複数のアクチュエータによってロール剛性を調整する技術では、部品点数が多く、構成が複雑になるという問題があった。 However, the technique of adjusting roll rigidity using a plurality of actuators as in Patent Document 1 has a problem in that the number of parts is large and the configuration is complicated.
　本発明は、上記に鑑みてなされたものであって、部品点数の増大を抑制しつつ、ロール剛性を調整することができる懸架システムを提供することを目的とする。 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.
　上述した課題を解決し、目的を達成するために、本発明に係る懸架システムは、帯状に延びる板ばねと、前記板ばねの一端部を支持する第１アームと、前記板ばねの他端部を支持する第２アームと、前記第１および第２アームに接続するメンバーと、前記メンバーまたは車体構造に接続するとともに、前記板ばねの一部を把持し、該板ばねの形状を変化させる調整装置と、を備えることを特徴とする。 In order to solve the above-mentioned problems and achieve the objects, a suspension system according to the present invention 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.
　また、本発明に係る懸架システムは、上記の発明において、前記調整装置は、回転中心を有し、前記板ばねの一部を把持する動作部材と、前記回転中心のまわりに前記動作部材を回転させるアクチュエータと、を備え、前記アクチュエータを制御する制御装置、をさらに備えることを特徴とする。 Further, in the suspension system according to the present invention, in the above invention, 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.
　また、本発明に係る懸架システムは、上記の発明において、前記動作部材は、前記メンバーと前記板ばねとの間に位置する、ことを特徴とする。 Furthermore, 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.
　また、本発明に係る懸架システムは、上記の発明において、前記動作部材と前記板ばねとの間には、弾性部材が設けられる、ことを特徴とする。 Furthermore, the 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.
　また、本発明に係る懸架システムは、上記の発明において、前記動作部材は、前記板ばねの長手方向の中央部に対して互いに反対側の二箇所を支持する、ことを特徴とする。 Furthermore, 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.
　本発明によれば、部品点数の増大を抑制しつつ、ロール剛性を調整することができるという効果を奏する。 According to the present invention, the roll rigidity can be adjusted while suppressing an increase in the number of parts.
図１は、本発明の一実施の形態に係る懸架システムの構成を模式的に示す図である。FIG. 1 is a diagram schematically showing the configuration of a suspension system according to an embodiment of the present invention. 図２は、本発明の一実施の形態に係る懸架システムの要部の構成を模式的に示す図である。FIG. 2 is a diagram schematically showing the configuration of main parts of a suspension system according to an embodiment of the present invention. 図３は、車体がロールした場合の状態を説明するための図である。FIG. 3 is a diagram for explaining a state when the vehicle body rolls. 図４は、ロール剛性調整後の状態を説明するための図である。FIG. 4 is a diagram for explaining the state after roll rigidity adjustment. 図５は、制御装置によるアクチュエータの制御の流れを説明するフローチャートである。FIG. 5 is a flowchart illustrating the flow of control of the actuator by the control device. 図６は、本発明の変形例に係る懸架システムの要部の構成を模式的に示す図である。FIG. 6 is a diagram schematically showing the configuration of main parts of a suspension system according to a modification of the present invention.
　以下、本発明を実施するための形態を図面と共に詳細に説明する。なお、以下の実施の形態により本発明が限定されるものではない。また、以下の説明において参照する各図は、本発明の内容を理解し得る程度に形状、大きさ、及び位置関係を概略的に示してあるに過ぎない。すなわち、本発明は各図で例示された形状、大きさ、及び位置関係のみに限定されるものではない。 Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the following embodiments. Furthermore, the figures referred to in the following description merely show the shape, size, and positional relationship schematically to the extent that the content of the present invention can be understood. That is, the present invention is not limited to the shapes, sizes, and positional relationships illustrated in each figure.
（実施の形態）
　図１は、本発明の一実施の形態に係る懸架システムの構成を模式的に示す図である。図２は、本発明の一実施の形態に係る懸架システムの要部の構成を模式的に示す図である。懸架システム１は、例えば車両に設けられ、右側の車輪１０１、左側の車輪１０２、及び車体（ボディ）の間に介在して、車輪から伝わる振動が車体に伝達されることを抑制する、所謂横置き板ばね式のサスペンションである。 (Embodiment)
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.
　懸架システム１は、右側の車輪１０１を支持する右アーム１１と、左側の車輪１０２を支持する左アーム１２と、車体を支持するメンバー１３と、車輪１０１、１０２からの振動に応じて弾性変形する板ばね１４と、板ばね１４に対して荷重を加えることによってロール剛性を調整する調整装置１５とを備える。懸架システム１は、メンバー１３を経て車体に取り付けられ、路面の凹凸に応じて車輪から伝達される振動を吸収する。車輪は、ナックルやディスクロータ等を経てアームに支持される。なお、図１において、左右方向は車体に取り付けられた際の車両の左右方向であり、懸架システム１の長手方向に相当し、紙面と直交する方向は車両の前後方向に相当し、上下方向は車両の上下方向に相当する。 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. In addition, in FIG. 1, 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, and the up-down direction is the direction of the vehicle. Corresponds to the vertical direction of the vehicle.
　右アーム１１は、板ばね１４の一端を把持するとともに、車輪１０１側と反対側の端部においてメンバー１３と接続する。右アーム１１は、リンク等によって板ばね１４を把持する。 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.
　左アーム１２は、板ばね１４の他端を把持するとともに、車輪１０２側と反対側の端部においてメンバー１３と接続する。左アーム１２は、リンク等によって板ばね１４を把持する。 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.
　メンバー１３は、車体を支持し、車体と、車輪１０１、１０２、右アーム１１および左アーム１２との間に介在する。メンバー１３は、右アーム１１および左アーム１２に接続する本体部１３１と、前後方向にそれぞれに延びてアームを支持する第１支持部１３２および第２支持部１３３を有する。
　本体部１３１は、左右方向（車体の左右方向）に延び、両端部が下方向に屈曲してなる。第１支持部１３２は、右アーム１１を、前後方向に延びる回転軸のまわりに回転可能に支持する。第２支持部１３３は、左アーム１２を、前後方向に延びる回転軸のまわりに回転可能に支持する。 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.
　板ばね１４は、帯状をなして左右方向に延びる。板ばね１４は、例えば、繊維強化プラスチック（Fiber　Reinforced　Plastics：ＦＲＰ）や、金属、樹脂を用いて形成される。板ばねは、一枚の板材からなるものであってもよいし、複数枚の板材を積層してなるものであってもよい。なお、板ばね１４の形状や弾性力等を設計するうえで、ＦＲＰは、金属や樹脂と比して、その設計の自由度が高い。
　ここで、後述する動作部材１５１は、メンバー１３と板ばね１４との間に設けられており、メンバー１３と板ばね１４とが形成する空間内に収容されている。 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. In addition, when designing the shape, elastic force, etc. of the leaf spring 14, FRP has a higher degree of freedom in design than metal or resin.
Here, 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.
　調整装置１５は、動作部材１５１と、回転軸１５２と、アクチュエータ１５３とを有する。
　動作部材１５１は、板ばね１４を把持し、回転軸１５２のまわりに回転可能である。動作部材１５１には、板ばね１４が貫通している。動作部材１５１は、板ばね１４の長手方向において互いに異なる二つの箇所を把持する。本実施の形態において、動作部材１５１は、板ばね１４の長手方向の中央部に対して互いに反対側に位置する二箇所を支持する。なお、把持位置および把持箇所の数は、適宜設定が可能である。 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.
　動作部材１５１と板ばね１４との間には、弾性部材１５４が設けられている（図２参照）。弾性部材１５４は、例えば動作部材１５１の内壁に固着され、動作部材１５１と板ばね１４との干渉を抑制する。 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.
　回転軸１５２は、前後方向に延び、アクチュエータ１５３の駆動によって回転する。回転軸１５２には、動作部材１５１が固定される。このため、回転軸１５２の回転によって、動作部材１５１が回転する。本実施の形態において、動作部材１５１は、回転軸１５２を回転中心として回転する。すなわち、動作部材１５１は、回転軸１５２の中心軸に相当する回転中心を有する。 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. In this embodiment, 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.
　アクチュエータ１５３は、回転軸１５２が接続されるとともに、制御装置２０と電気的に接続する。アクチュエータ１５３は、制御装置２０の制御のもと、回転軸１５２を回転させる。アクチュエータ１５３は、例えばモータ、油圧シリンダ、ボールねじ、油圧ベローズ、空圧装置、ベーンポンプ等を用いて構成される。 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.
　アクチュエータ１５３を駆動させて回転軸１５２を回転させると、回転軸１５２に連動して動作部材１５１が回転する。動作部材１５１が回転すると、把持箇所から板ばね１４が変形させられる。この板ばね１４の形状の変化によって、懸架システム１の荷重のバランスが変化する。 When the actuator 153 is driven to rotate the rotating shaft 152, the operating member 151 rotates in conjunction with the rotating shaft 152. When the operating member 151 rotates, the leaf spring 14 is deformed from the gripping location. This change in the shape of the leaf spring 14 changes the load balance of the suspension system 1.
　図３は、車体がロールした場合の状態を説明するための図である。図４は、ロール剛性調整後の状態を説明するための図である。
　車体１０３がロールして車体１０３が傾くとき、車体１０３には、モーメント荷重が加わる（図３：矢印ＹA参照）。このとき、調整装置１５では、アクチュエータ１５３を駆動して動作部材１５１を、車体１０３の回転方向と同じ方向（矢印ＹB）に回転させる。動作部材１５１の回転によって、板ばね１４の荷重のバランスが変化してロール剛性が調整され、車体１０３のロールが低減される（図４参照）。 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.
When the vehicle body 103 rolls and the vehicle body 103 tilts, a moment load is applied to the vehicle body 103 (see arrow Y A in FIG. 3). At this time, 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).
　制御装置２０は、調整装置１５のアクチュエータ１５３の動作を制御する。また、制御装置２０は、車両に設けられる各種センサ（ここでは車速センサ２１、ストロークセンサ２２、ジャイロセンサ２３および操舵角センサ２４）からの検出信号を受信する。
　制御装置２０は、ＣＰＵ（Central　Processing　Unit）等のプロセッサや、ＡＳＩＣ（Application　Specific　Integrated　Circuit）等の特定の機能を実行する各種演算回路等のプロセッサや、各腫制御プログラムを記憶する揮発性メモリまたは不揮発性メモリ、例えば、ＲＡＭ（Random　Access　Memory）、ＲＯＭ（Read　Only　Memory）等を用いて構成される。 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).
　車速センサ２１は、車両の速度を示す信号値を出力する。 The vehicle speed sensor 21 outputs a signal value indicating the speed of the vehicle.
　ストロークセンサ２２は、サスペンションのストローク量を示す信号値を出力する。 The stroke sensor 22 outputs a signal value indicating the stroke amount of the suspension.
　ジャイロセンサ２３は、車体の傾きを示す検出値を算出するための検出信号を出力する。ジャイロセンサ２３は、例えば、互いに直交する３つの軸と、各軸の角速度との６軸の慣性センサを用いて構成される。 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.
　操舵角センサ２４は、車両のステアリングホイールの操舵角を示す信号値を出力する。 The steering angle sensor 24 outputs a signal value indicating the steering angle of the steering wheel of the vehicle.
　続いて、ロール剛性の制御時における制御装置２０による処理の流れについて、図５を参照して説明する。図５は、制御装置によるアクチュエータの制御の流れを説明するフローチャートである。 Next, the flow of processing by the control device 20 when controlling roll rigidity will be described with reference to FIG. 5. FIG. 5 is a flowchart illustrating the flow of control of the actuator by the control device.
　まず、制御装置２０は、車両の走行速度を取得する（ステップＳ１０１）。この際、制御装置２０は、車速センサ２１から信号値を取得することによって走行速度を取得する。 First, 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.
　制御装置２０は、取得した走行速度が、予め設定されている閾値より大きいか否かを判断する（ステップＳ１０２）。閾値は、ステアリングホイールの操作が車体のロールに影響を及ぼし得る走行速度に基づいて設定される。制御装置２０は、走行速度が閾値以下であると判断した場合（ステップＳ１０２：Ｎｏ）、ステップＳ１０４に移行する。制御装置２０は、走行速度が閾値より大きいと判断した場合（ステップＳ１０２：Ｙｅｓ）、ステップＳ１０３に移行する。 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. When 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. When the control device 20 determines that the traveling speed is greater than the threshold (step S102: Yes), the process proceeds to step S103.
　ステップＳ１０３において、制御装置２０は、ストロークセンサ２２およびジャイロセンサ２３がそれぞれ出力した出力値に基づいて、アクチュエータ１５３の動作目標値を算出する。制御装置２０は、動作目標値を算出後、ステップＳ１０５に移行する。
　ここで、動作目標値は、アクチュエータ１５３が回転させる回転軸１５２の回転方向および回転量を示す値である。この際、回転方向は、例えば、値の正負によって区別される。 In 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.
Here, 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.
　また、ステップＳ１０４において、制御装置２０は、ストロークセンサ２２、ジャイロセンサ２３および操舵角センサ２４がそれぞれ出力した出力値に基づいて、アクチュエータ１５３の動作目標値を算出する。制御装置２０は、動作目標値を算出後、ステップＳ１０５に移行する。 Furthermore, in 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.
　ステップＳ１０５において、制御装置２０は、動作目標値にしたがってアクチュエータ１５３を駆動させ、回転軸１５２を回転させる。この回転軸１５２の回転によって、動作部材１５１が回転し、ロール剛性が調整される。 In 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.
　以上説明した本発明の実施の形態では、アクチュエータ１５３の駆動によって回転する回転軸１５２が、板ばね１４を把持する動作部材１５１を回転させ、ロール剛性の調整を行う。この際、一つの動作部材１５１が、板ばね１４の複数箇所を把持し、回転によって板ばね１４の形状を変化させる。本実施の形態によれば、部品点数の増大を抑制しつつ、ロール剛性を調整することができる。 In the embodiment of the present invention described above, 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. At this time, one operating member 151 grips a plurality of locations on the leaf spring 14 and changes the shape of the leaf spring 14 by rotation. According to this embodiment, roll rigidity can be adjusted while suppressing an increase in the number of parts.
　また、本実施の形態によれば、動作部材１５１をメンバー１３内に収容しているため、動作部材１５１の配設による車両の大型化を抑制することができる。 Furthermore, according to the present embodiment, 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.
　また、実施の形態において、動作部材１５１が、板ばね１４に対し、二箇所で把持する例について説明したが、板ばね１４に対する把持位置や、把持箇所数は適宜設定することが可能である。 Furthermore, in the embodiment, an example has been described in which the operating member 151 grips the leaf spring 14 at two locations, but the gripping position and the number of gripping locations on the leaf spring 14 can be set as appropriate.
（変形例）
　次に、本実施の形態の変形例について、図６を参照して説明する。図６は、本発明の変形例に係る懸架システムの要部の構成を模式的に示す図である。変形例は、上述した実施の形態に係る調整装置１５に代えて調整装置１５Ａを備える。その他の構成要素については実施の形態と同じであるため、説明を省略する。 (Modified example)
Next, a modification of this embodiment will be described with reference to FIG. 6. 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.
　調整装置１５Ａは、動作部材１５１と、回転軸１５２と、アクチュエータ１５５とを有する。なお、動作部材１５１は、板ばね１４を把持し、回転軸１５２のまわりに回転可能である。動作部材１５１には、板ばね１４が貫通している。動作部材１５１は、板ばね１４の長手方向において互いに異なる二つの箇所を把持する。なお、把持位置および把持箇所の数は、適宜設定が可能である。また、動作部材１５１には、中空部において弾性部材１５４が設けられている。 The adjustment device 15A includes an operating member 151, a rotating shaft 152, and an actuator 155. Note that 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.
　アクチュエータ１５５は、制御装置２０（図１参照）と電気的に接続する。また、アクチュエータ１５５は、動作部材１５１に当接する制御軸１５５ａと、駆動部とを有する。アクチュエータ１５５は、制御装置２０の制御のもと、制御軸１５５ａを進退させて動作部材１５１に当接させ、動作部材１５１を回転軸１５２のまわりに回転させる。アクチュエータ１５５の駆動部には、例えばモータ、油圧シリンダ、ボールねじ、油圧ベローズ、空圧装置等が用いられる。 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 . For the drive unit of the actuator 155, a motor, a hydraulic cylinder, a ball screw, a hydraulic bellows, a pneumatic device, etc. are used, for example.
　アクチュエータ１５５を駆動させて回転軸１５２を回転させると、回転軸１５２に連動して動作部材１５１が回転する。動作部材１５１が回転すると、把持箇所から板ばね１４が引っ張られて形状が変化する。この板ばね１４の形状の変化によって、懸架システムの荷重のバランスが変化する。 When the actuator 155 is driven to rotate the rotating shaft 152, the operating member 151 rotates in conjunction with the rotating shaft 152. When the operating member 151 rotates, the leaf spring 14 is pulled from the gripping location and its shape changes. This change in the shape of the leaf spring 14 changes the load balance of the suspension system.
　以上説明した変形例では、アクチュエータ１５５の駆動によって板ばね１４を把持する動作部材１５１を回転させ、ロール剛性の調整を行うため、実施の形態と同様に、部品点数の増大を抑制しつつ、ロール剛性を調整することができる。 In the modified example described above, 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.
　ここまで、本発明を実施するための形態を説明してきたが、本発明は上述した実施の形態によってのみ限定されるべきものではない。 Although the embodiments for implementing the present invention have been described so far, the present invention should not be limited only by the embodiments described above.
　なお、実施の形態および変形例において、弾性部材１５４を有しない構成としてもよい。この際、板ばね１４の位置ずれ抑制や、板ばね１４と動作部材１５１との干渉による損傷抑制の観点から、弾性部材１５４を有する構成が好ましい。 Note that in the embodiment and the modified examples, 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.
　また、実施の形態および変形例では、調整装置１５、１５Ａがメンバー１３に接続している例について説明したが、調整装置１５、１５Ａが、メンバー１３以外の車体構造に接続するものであってもよい。 Further, in the embodiment and the modified example, an example in which the adjustment devices 15 and 15A are connected to the member 13 has been described, but the adjustment devices 15 and 15A may be connected to a vehicle body structure other than the member 13. good.
　このように、本発明はここでは記載していない様々な実施の形態等を含みうるものであり、請求の範囲により特定される技術的思想を逸脱しない範囲内において種々の設計変更等を施すことが可能である。 As described above, 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.
　以上説明したように、本発明に係る懸架システムは、部品点数の増大を抑制しつつ、ロール剛性を調整するのに好適である。 As explained above, the suspension system according to the present invention is suitable for adjusting roll rigidity while suppressing an increase in the number of parts.
　１　懸架システム
　１１　右アーム
　１２　左アーム
　１３　メンバー
　１４　板ばね
　１５、１５Ａ　調整装置
　２０　制御装置
　２１　車速センサ
　２２　ストロークセンサ
　２３　ジャイロセンサ
　２４　操舵角センサ
　１０１、１０２　車輪
　１０３　車体
　１３１　本体部
　１３２　第１支持部
　１３３　第２支持部
　１５１　動作部材
　１５２　回転軸
　１５３、１５５　アクチュエータ
　１５４　弾性部材 1 Suspension system 11 Right arm 12 Left arm 13 Member 14 Leaf spring 15, 15A Adjustment device 20 Control device 21 Vehicle speed sensor 22 Stroke sensor 23 Gyro sensor 24 Steering angle sensor 101, 102 Wheel 103 Vehicle body 131 Main body portion 132 First support portion 133 Second support part 151 Operating member 152 Rotating shaft 153, 155 Actuator 154 Elastic member

Claims (5)

  1. 　帯状に延びる板ばねと、
    　前記板ばねの一端部を支持する第１アームと、
    　前記板ばねの他端部を支持する第２アームと、
    　前記第１および第２アームに接続するメンバーと、
    　前記メンバーまたは車体構造に接続するとともに、前記板ばねの一部を把持し、該板ばねの形状を変化させる調整装置と、
    　を備えることを特徴とする懸架システム。     A leaf spring that extends in a band shape,
    a first arm supporting one end of the leaf spring;
    a second arm supporting the other end of the leaf spring;
    a member connected to the first and second arms;
    an adjustment device that is connected to the member or the vehicle body structure, grips a part of the leaf spring, and changes the shape of the leaf spring;
    A suspension system comprising:
  2. 　前記調整装置は、
    　回転中心を有し、前記板ばねの一部を把持する動作部材と、
    　前記回転中心のまわりに前記動作部材を回転させるアクチュエータと、
    　を備え、
    　前記アクチュエータを制御する制御装置、
    　をさらに備えることを特徴とする請求項１に記載の懸架システム。     The adjustment device is
    an operating member having a rotation center and gripping a portion of the leaf spring;
    an actuator that rotates the operating member around the rotation center;
    Equipped with
    a control device that controls the actuator;
    The suspension system of claim 1, further comprising:
  3. 　前記動作部材は、前記メンバーと前記板ばねとの間に位置する、
    　ことを特徴とする請求項２に記載の懸架システム。     the operating member is located between the member and the leaf spring;
    Suspension system according to claim 2, characterized in that.
  4. 　前記動作部材と前記板ばねとの間には、弾性部材が設けられる、
    　ことを特徴とする請求項２に記載の懸架システム。     an elastic member is provided between the operating member and the leaf spring;
    Suspension system according to claim 2, characterized in that.
  5. 　前記動作部材は、前記板ばねの長手方向の中央部に対して互いに反対側の二箇所を支持する、
    　ことを特徴とする請求項２に記載の懸架システム。     The operating member supports two locations on opposite sides of the longitudinal center of the leaf spring.
    Suspension system according to claim 2, characterized in that.
PCT/JP2023/031515 2022-09-09 2023-08-30 Suspension system WO2024053513A1 (en)

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JP2022-143758 2022-09-09
JP2022143758A JP2024039305A (en) 2022-09-09 2022-09-09 suspension system

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0679610U (en) * 1993-04-30 1994-11-08 三菱自動車工業株式会社 Horizontally mounted leaf spring type suspension device
US5873581A (en) * 1992-08-17 1999-02-23 Yale; Donald M. Truck steering stabilizer
JP2001130234A (en) * 1999-11-09 2001-05-15 Hironaka Nonogaki Car height adjusting type automobile, car height adjusting device and shackle
DE102010022895A1 (en) * 2010-06-07 2011-12-08 Schaeffler Technologies Gmbh & Co. Kg Device for chassis of multilane motor vehicle, has transverse leaf spring that is arranged transverse to vehicle longitudinal axis of motor vehicle, where transverse leaf spring is connected at wheels on one hand of axis
JP2022032361A (en) * 2020-08-11 2022-02-25 日本発條株式会社 Suspension device

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 (en) * 1993-04-30 1994-11-08 三菱自動車工業株式会社 Horizontally mounted leaf spring type suspension device
JP2001130234A (en) * 1999-11-09 2001-05-15 Hironaka Nonogaki Car height adjusting type automobile, car height adjusting device and shackle
DE102010022895A1 (en) * 2010-06-07 2011-12-08 Schaeffler Technologies Gmbh & Co. Kg Device for chassis of multilane motor vehicle, has transverse leaf spring that is arranged transverse to vehicle longitudinal axis of motor vehicle, where transverse leaf spring is connected at wheels on one hand of axis
JP2022032361A (en) * 2020-08-11 2022-02-25 日本発條株式会社 Suspension device

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