KR20080016286A - A stiffness control apparatus of a leaf spring - Google Patents

A stiffness control apparatus of a leaf spring Download PDF

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Publication number
KR20080016286A
KR20080016286A KR1020060078201A KR20060078201A KR20080016286A KR 20080016286 A KR20080016286 A KR 20080016286A KR 1020060078201 A KR1020060078201 A KR 1020060078201A KR 20060078201 A KR20060078201 A KR 20060078201A KR 20080016286 A KR20080016286 A KR 20080016286A
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KR
South Korea
Prior art keywords
leaf spring
side frame
bracket
worm gear
vehicle
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KR1020060078201A
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Korean (ko)
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KR101189361B1 (en
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석동철
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현대자동차주식회사
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Priority to KR1020060078201A priority Critical patent/KR101189361B1/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
    • 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
    • B60G17/015—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 the regulating means comprising electric or electronic elements
    • B60G17/0152—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 the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit
    • B60G17/0157—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 the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit non-fluid unit, e.g. electric motor
    • 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
    • B60G17/015—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 the regulating means comprising electric or electronic elements
    • B60G17/018—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 the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method
    • 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
    • B60G17/015—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 the regulating means comprising electric or electronic elements
    • B60G17/019—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 the regulating means comprising electric or electronic elements characterised by the type of sensor or the arrangement thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/121—Mounting of leaf springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/419—Gears
    • B60G2204/4192—Gears rack and pinion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/419—Gears
    • B60G2204/4193—Gears worm gears
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/43—Fittings, brackets or knuckles
    • 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
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/18—Leaf springs
    • F16F1/182—Leaf springs with inter-engaging portions between leaves or between leaves and mountings, e.g. ridges, notches, ripples
    • 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
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
    • F16H1/16—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel
    • 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
    • F16H—GEARING
    • F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
    • F16H19/02—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion
    • F16H19/04—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising a rack

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

Abstract

A stiffness control apparatus of a leaf spring in a vehicle is provided to adjust length of the leaf spring to a longitudinal direction of a side frame through a control part and to control the rigidity of the bending of the leaf spring. A leaf spring assembly has a leaf spring(230) installed at the lower part of a side frame(100), a shackle(210) fixing the leaf spring at the side frame, and a bracket(220) combining the leaf spring with the side frame. The bracket is installed at the lower part of the side frame. A stiffness control apparatus(300) of the leaf spring comprises a driving part, a sensor(320), and a control part. The driving part includes a rack gear(312) placed at the upper part of the bracket, a worm gear moving the bracket, and a driving motor driving the worm gear forwardly and reversely. The sensor detects the change of the outer force. The control part adjusts the length of the leaf spring to the longitudinal direction of the side frame by controlling the driving motor. The driving part includes a guide rail(314) fixed at the side frame.

Description

차량용 리프스프링의 강성 조절 장치{A stiffness control apparatus of a leaf spring}A stiffness control apparatus of a leaf spring

도 1은 종래의 리프스프링의 구성을 도시한 사시도.1 is a perspective view showing the configuration of a conventional leaf spring.

도 2는 도 1에 따른 리프스프링 조립체를 도시한 정면도.Figure 2 is a front view of the leaf spring assembly according to Figure 1;

도 3은 본 발명에 의한 리프스프링의 강성 조절장치를 도시한 정면도.Figure 3 is a front view showing the stiffness adjustment device of the leaf spring according to the present invention.

도 4는 도 3에 따른 리프스프링의 강성 조절 장치의 요부 정면도.Figure 4 is a front view of the main part of the rigidity adjustment device of the leaf spring according to FIG.

도 5a는 공차 상태 또는 가벼운 짐 적재시를 나타내는 상태도.Figure 5a is a state diagram showing the tolerance state or when loading light load.

도 5b는 무거운 짐 적재 시 또는 험로 주행 시를 나타내는 상태도.Fig. 5B is a state diagram showing when a heavy load is loaded or when driving on a rough road.

*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings

200 : 리프스프링 조립체 230 : 리프스프링200: leaf spring assembly 230: leaf spring

300 : 강성 조절 장치 312 : 랙기어300: rigidity control device 312: rack gear

316 : 웜기어 318 : 구동모터316: worm gear 318: drive motor

330 : 컨트롤 박스(제어부) 330: control box (control unit)

본 발명은 리프스프링의 강성 조절 장치에 관한 것으로서, 리프스프링이 장 착된 차량의 주행중에 하중이나 외력에 대해 발생하는 반력에 따라 리프스프링의 길이를 조절하여 리프스프링의 벤딩(Bending)에 대한 강성을 조절하기 위한 리프스프링의 강성 조절 장치에 관한 것이다.The present invention relates to a stiffness adjustment device of the leaf spring, the stiffness to the bending of the leaf spring by adjusting the length of the leaf spring according to the reaction force generated against the load or external force while the vehicle is mounted on the leaf spring It relates to a stiffness adjustment device of the leaf spring for adjusting.

일반적으로 자동차의 차체는 타이어와 연결되는 현가장치에 의해 지지된다. 상기 현가장치는 차량 주행중에 발생하는 각종 진동과 충격을 흡수하여 승차감을 향상시키고 주행중에 노면의 상태에 따라 차체의 전체적인 밸런스를 조정하게 된다. 그리고 선회시에는 원심력에 대항하여 운전자의 안정적인 조정성을 확보하여 원심력에 따른 일 방향으로의 기울임 현상을 방지하게 된다.In general, the vehicle body is supported by a suspension that is connected to the tire. The suspension system absorbs various vibrations and shocks generated while driving the vehicle to improve ride comfort and adjust the overall balance of the vehicle body according to the road surface condition while driving. And when turning, the driver's stable control against the centrifugal force is secured to prevent tilting in one direction due to the centrifugal force.

상기한 현가장치에 주로 사용되는 타입은 스프링 강판을 적층시켜 사용하는 리프스프링(Leaf Spring)과 코일 모양으로 둥글게 감아 만든 코일스프링(Coil Spring)이 있다.The type mainly used for the suspension device is a leaf spring (Layer Spring) used by laminating a spring steel plate and a coil spring (Coil Spring) made of a coil wound roundly.

일반적으로 리프스프링의 조립체는 짐 적재에 따른 하중 또는 액슬로부터 노면의 외력이 전달되었을 때, 액슬과 프레임은 상대적으로 상하운동을 하게 되며 리프스프링은 구속된 새클부로 인해 벤딩의 거동을 보이면서 상하운동을 지지할 수 있는 반력을 형성한다. 이러한 리프스프링의 벤딩 에너지를 이용하여 외력이 프레임으로 직접 전달되는 것을 막고, 승차감을 결정하는 역할을 한다.In general, the assembly of the leaf spring has a vertical movement of the axle and the frame when the external force of the road is transmitted from the load or axle according to the load, and the leaf spring shows the bending behavior due to the constrained sackle. Form a supportive reaction. The bending energy of the leaf spring is used to prevent external force from being directly transmitted to the frame and to determine ride comfort.

첨부된 도 1은 종래의 리프스프링의 구성을 도시한 사시도이고, 도 2는 도 1에 따른 리프스프링 조립체를 도시한 정면도이다. 1 is a perspective view showing the configuration of a conventional leaf spring, Figure 2 is a front view showing the leaf spring assembly according to FIG.

도 1 및 도 2에 도시된 바와 같이, 종래의 리프스프링 조립체(200)는 리프스프링(230)의 최상면의 양단에 형성된 스프링 아이(미도시)와, 일단은 새클(210)을 매개체로 하여 프레임(100)과 연결되고, 타단은 브라켓(220)을 매개체로 하여 프라임(100)에 연결되는 리프스프링(230)으로 구성된다.1 and 2, the conventional leaf spring assembly 200 is a spring eye (not shown) formed on both ends of the top surface of the leaf spring 230, and one end of the frame via the sackle (210) It is connected to the 100, and the other end is composed of a leaf spring 230 connected to the prime 100 via the bracket 220 as a medium.

차량에 가해지는 충격량이나 하중은 일정하지 않고 항상 변화되지만, 종래의 리프스프링 조립체의 경우 차량이 받는 충격에 따라 리프스프링의 강성이 변하지 않는다. 따라서 충격량이 커질 경우 이 충격을 감쇄할 수 있을 정도의 강성을 제공하지 못해 차량에 가해지는 충격에 따른 진동이 차량의 내부로 전달되어 승차감을 저하시키는 문제가 있다.The amount of impact or load applied to the vehicle is not constant and always changes, but in the case of a conventional leaf spring assembly, the rigidity of the leaf spring does not change according to the impact received by the vehicle. Therefore, when the amount of impact is large, there is a problem in that the vibration due to the impact applied to the vehicle is transmitted to the inside of the vehicle because it cannot provide the rigidity enough to attenuate the impact, thereby degrading the riding comfort.

본 발명은 상기한 문제점을 해결하기 위하여 안출된 것으로서, 리프스프링의 강성을 조절하여 리프스프링의 성능저하를 방지하고 승차감을 개선하기 위해 리프스프링의 강성 조절 장치를 제공하는데 목적이 있다.The present invention has been made to solve the above problems, and an object of the present invention is to provide a stiffness control device of a leaf spring to adjust the rigidity of the leaf spring to prevent performance degradation of the leaf spring and to improve ride comfort.

상기한 목적을 달성하기 위한 본 발명은, 차량의 사이드 프레임의 하측에 설치되는 리프스프링, 상기 리프스프링의 일단에 결합되어 상기 리프스프링을 상기 사이드 프레임에 고정시키는 새클, 상기 리프스프링의 타단에 결합되어 상기 리프스프링을 상기 사이드 프레임에 결합시키는 브라켓이 구비된 리프스프링 조립체에 있어서, 상기 브라켓은 상기 사이드 프레임의 길이 방향으로 움직일 수 있도록 상기 사이드 프레임의 하측에 연결 설치 되고, 상기 사이드 프레임 하측에 설치되되 상기 브라켓의 상부에 위치하는 랙기어, 상기 브라켓에 지지되며 랙기어와 맞물려 회전하면서 상기 브라켓을 이동시키는 웜기어, 상기 웜기어에 연결 설치되어 상기 웜기어를 정방향 또는 역방향으로 구동시키는 구동모터를 포함하는 구동부; 차량에 설치되어 차량의 하중이나 외력을 변화를 감지하는 감지센서; 및 상기 감지센서에 연결되어 감지센서가 감지한 신호 변화에 의해 웜기어가 회전할 수 있도록 구동모터를 컨트롤함으로써 상기 사이드 프레임의 길이 방향으로 리프스프링의 길이 변화를 가능하게 하는 제어부를 포함하여 구성되는 것을 특징으로 하는 리프스프링의 강성 조절 장치를 제공한다. 상기 구동부는 랙기어를 지지할 수 있도록 상기 사이드 프레임에 고정 설치된 가이드레일을 더 포함하는 리프스프링의 강성 조절 장치를 제공하는 것을 특징으로 한다.The present invention for achieving the above object, the leaf spring is installed on the lower side of the vehicle side frame, a sackle coupled to one end of the leaf spring fixed to the side frame, coupled to the other end of the leaf spring The leaf spring assembly is provided with a bracket for coupling the leaf spring to the side frame, the bracket is connected to the lower side of the side frame so as to move in the longitudinal direction of the side frame, installed below the side frame The drive unit including a rack gear located on the upper portion of the bracket, the worm gear is supported on the bracket and rotates in engagement with the rack gear to move the bracket, and is connected to the worm gear to drive the worm gear in a forward or reverse direction. ; A detection sensor installed in the vehicle and detecting a change in load or external force of the vehicle; And a control unit connected to the detection sensor to control the driving motor to rotate the worm gear according to the signal change detected by the detection sensor to enable the length change of the leaf spring in the longitudinal direction of the side frame. Provided is a stiffness control device for a leaf spring. The drive unit is characterized in that to provide a rigid adjustment device of the leaf spring further comprises a guide rail fixed to the side frame to support the rack gear.

이하, 본 발명의 일 실시 예를 첨부된 도면을 참조하여 설명하기로 한다. 단, 종래기술과 동일한 구성요소에 대해서는 동일한 참조번호를 참조하여 설명하기로 한다.Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. However, the same components as in the prior art will be described with reference to the same reference numerals.

도 3은 본 발명에 의한 리프스프링의 강성 조절 장치를 도시한 정면도이고, 도 4는 도 3에 따른 리프스프링의 강성 조절 장치의 요부 정면도이다.Figure 3 is a front view showing the stiffness adjustment device of the leaf spring according to the present invention, Figure 4 is a front view of the main portion of the stiffness adjustment device of the leaf spring according to FIG.

도 3 및 도 4에 도시된 바와 같이, As shown in Figures 3 and 4,

리프스프링 조립체(200)는 일단은 새클(210)을 매개체로 하여 프레임(100)과 연결되고, 타단은 브라켓(220)을 매개체로 하여 프라임(100)에 연결되는 리프스프링(230)으로 구성된다. 리프스프링(230)의 강성을 조절하기 위한 강성 조절 장치(300)는 구동부(310), 감지센서(320), 제어부(330)를 포함한다.Leaf spring assembly 200 is one end is connected to the frame 100 via the sackle 210 as a medium, the other end is composed of a leaf spring 230 connected to the prime 100 via the bracket 220 as a medium. . The rigidity control device 300 for adjusting the rigidity of the leaf spring 230 includes a driving unit 310, a detection sensor 320, and a control unit 330.

상기 브라켓(220)은 사이드 프레임(100)하측에 설치되되 고정되는 것이 아니라 움직일 수 있도록 설치된다.(이에 관해서는 후술하기로 한다.)The bracket 220 is installed below the side frame 100 but not to be fixed, but to be movable. (This will be described later.)

구동부(310)는 브라켓(220)일측에 사이드 프레임(100)의 길이방향으로 연결 설치된다. 구동부(310)는 랙기어(312), 가이드레일(314), 웜기어(316), 구동모터(318)로 구성된다.The driving unit 310 is installed in the longitudinal direction of the side frame 100 on one side of the bracket 220. The driving unit 310 includes a rack gear 312, a guide rail 314, a worm gear 316, and a driving motor 318.

첨부된 도 3을 참조하면 랙기어(312)는 돌출부와 함몰부가 반복적으로 형성된 요철구조 형상으로 상기 브라켓(220)부분의 사이드 프레임(100)하측에 길이방향으로 설치되되, 가이드레일(314)에 의해 사이드 프레임(100)의 하측에 고정된다.Referring to FIG. 3, the rack gear 312 has a concave-convex structure in which protrusions and depressions are formed repeatedly, and is installed in a lengthwise direction below the side frame 100 of the bracket 220, and on the guide rail 314. It is fixed to the lower side of the side frame 100 by.

가이드레일(314)은 랙기어(312)를 상부에서 지지할 수 있도록 상기 사이드 프레임(100)과 랙기어(312) 사이에 고정 설치된다. 단, 가이드레일(314)이 랙기어(312)와 함께 고정되어 설치되지 않을 수도 있고, 랙기어(312)만 설치되거나 다른것으로 고정 설치될 수도 있다.The guide rail 314 is fixedly installed between the side frame 100 and the rack gear 312 to support the rack gear 312 from above. However, the guide rail 314 may not be fixed and installed together with the rack gear 312, or only the rack gear 312 may be installed or fixedly installed by another.

가이드레일(314)에는 길이 방향으로 함몰된 홈(314a)이 형성되고, 브라켓(220)에는 상기 홈에 이동 가능하게 삽입되는 돌기부(220a)가 형성된다. 상기 홈(314a)과 돌기부(220a)는 상호 맞물리도록 설치되는 것이 바람직하고, 이에 의해서 브라켓(220)이 가이드레일(314)로부터 임의로 이탈되지 않고 이동가능하게 결합될 수 있다. The guide rail 314 is formed with a groove 314a recessed in the longitudinal direction, and the bracket 220 is formed with a protrusion 220a which is movably inserted into the groove. The groove 314a and the protrusion 220a are preferably installed to engage with each other, whereby the bracket 220 may be movably coupled without being randomly separated from the guide rail 314.

브라켓(220)의 돌기부(220a)가 가이드레일(314)의 홈(314a)에 삽입된 상태에서 후술할 웜기어(316)가 정방향 또는 역방향으로 회전하면서 브라켓(220)을 슬라이딩 이동하도록 이동시킨다.In the state in which the protrusion 220a of the bracket 220 is inserted into the groove 314a of the guide rail 314, the worm gear 316 to be described later is rotated in the forward or reverse direction to move the bracket 220 in a sliding motion.

웜기어(316)는 랙기어(312)와 상호 맞물려 회전할 수 있도록 나사면 구조로 되어 랙기어(312)하측에 맞물려 설치되되 구동모터(318)의 일측에 연결 되도록 설 치된다.The worm gear 316 is screwed to the rack gear 312 to rotate with each other to be rotated to be installed in the rack gear 312 is installed to be coupled to one side of the drive motor 318.

구동모터(318)는 웜기어(316)에 연결 설치되며, 웜기어(316)를 정방향 또는 역방향으로 구동시킨다. 구동모터(318)에 의해 웜기어(316)가 정방향으로 회전하면 브라켓(220)이 A방향으로 이동하면서 리프스프링(230)이 당겨져 인장되고, 웜기어(316)가 역방향으로 회전하면 브라켓(220)이 B방향으로 이동하면서 리프스프링(230)이 압축되어 절곡된다. 그러나 구동모터(318)에 의해 웜기어(316)가 역방향으로 회전할 때 리프스프링(230)이 인장되고, 정방향으로 회전할 때 리프스프링(230)이 절곡되도록 설정될 수도 있다. The driving motor 318 is connected to the worm gear 316 and installed to drive the worm gear 316 in the forward or reverse direction. When the worm gear 316 rotates in the forward direction by the driving motor 318, the bracket 220 moves in the A direction, and the leaf spring 230 is pulled out and pulled. When the worm gear 316 rotates in the reverse direction, the bracket 220 rotates. The leaf spring 230 is compressed and bent while moving in the B direction. However, the leaf spring 230 may be tensioned when the worm gear 316 rotates in the reverse direction by the drive motor 318, and the leaf spring 230 may be bent when the worm gear 316 rotates in the reverse direction.

제어부(330)는 구동모터(318)하측에 설치되고, 웜기어(316)를 회전할 수 있도록 컨트롤한다.The control unit 330 is installed under the drive motor 318 and controls the worm gear 316 to rotate.

감지센서(320)는 짐 적재시 무거운 하중 또는 고르지 못한 노면과 지면의 장애물에 의해 차량의 휠에 전달된 충격을 감지할 수 있도록 차체의 액슬(110)상에 설치된다(도 1참조). 단, 감지센서(320)가 차량의 휠에 전달된 충격을 감지할 수 있는 곳이라면 액슬(110)상이 아닌 다른 위치에도 설치 가능하다(편의상 도 1에는감지센서가 액슬상에 설치된 것만 표시하였다).The sensor 320 is installed on the axle 110 of the vehicle body so as to detect the shock transmitted to the wheel of the vehicle by the heavy load or uneven road surface and the obstacle of the ground when loading the load (see Fig. 1). However, if the detection sensor 320 can detect the shock transmitted to the wheel of the vehicle, it can be installed at a position other than the axle 110 (for convenience, only the detection sensor is installed on the axle in FIG. 1). .

이러한 구성을 갖는 본 발명의 일 실시 예에 따른 리프스프링의 강성 조절 장치의 작동 원리를 설명하면 다음과 같다.Referring to the principle of operation of the rigidity control device of the leaf spring according to an embodiment of the present invention having such a configuration as follows.

주행시 감지센서(320)가 차량의 하중이나 외력을 감지하면 제어유닛(Control Unit, 미도시)이 외력 변화를 판단하여 새클의 위치가 결정되고 제어부(330)에 신호를 전송하게 된다. 전송된 신호에 따라서 제어부(330)가 구동모터(318)를 구동시 킨다. 이에 따라 웜기어(316)가 정방향 또는 역방향으로 회전하게 되고 리프스프링(230)의 위치이동에 따라 강성이 증가하거나 감소하게 된다.When the sensor 320 detects a load or an external force of the vehicle while driving, a control unit (not shown) determines the external force change, determines the position of the circle, and transmits a signal to the controller 330. The control unit 330 drives the driving motor 318 according to the transmitted signal. Accordingly, the worm gear 316 rotates in the forward or reverse direction and the rigidity increases or decreases as the leaf spring 230 moves.

첨부된 도 5a는 공차 상태 또는 가벼운 짐 적재 시를 나타내는 상태도이고, 도 5b는 무거운 짐 적재 시 또는 험로 주행 시를 나타내는 상태도이다.5A is a state diagram illustrating a tolerance state or a light load state, and FIG. 5B is a state diagram showing a heavy load state or when driving on a bad road.

도 5a에 도시된 바와 같이, 차량에 작은 외력이 감지되면 웜기어의 회전 방향에 따라 리프스프링의 위치가 B에서 B'로 이동하면서 리프스프링이 당겨져 인장된다. 이것은 차량에 작용하는 외력이 작기 때문에 작은 외력에 대한 지지도(반력)가 약하게 작용해도 되므로 리프스프링을 인장시키는 것이다. 리프스프링이 인장되면 외력에 따른 변위가 작아지고 강성이 감소되어 부드러운 승차감을 유지하게 된다.As shown in FIG. 5A, when a small external force is detected by the vehicle, the leaf spring is pulled and tensioned while the leaf spring is moved from B to B 'according to the rotation direction of the worm gear. This is to tension the leaf spring because the external force acting on the vehicle is small and the support force (reaction force) for the small external force may act weakly. When the leaf spring is tensioned, displacement due to external force decreases and rigidity is reduced to maintain a smooth ride.

반대로 도 5b에 도시된 바와 같이, 차량에 큰 외력이 감지되면 웜기어의 회전 방향에 따라 리프스프링의 위치가 B에서 B'로 이동하면서 리프스프링이 압축되어 절곡된다. 이것은 차량에 작용하는 외력이 크기 때문에 큰 외력에 대한 지지도(반력)가 크게 작용해야 하므로 리프스프링을 절곡시키는 것이다. 리프스프링이 절곡되면 외력에 따른 변위가 커지고 강성이 증가되어 서스펜션의 상태가 하드(Hard)해지고 안정감을 살릴 수 있게 된다.On the contrary, as shown in FIG. 5B, when a large external force is sensed in the vehicle, the leaf spring is compressed and bent while the leaf spring is moved from B to B 'according to the rotation direction of the worm gear. This is the bending of the leaf spring because of the large external force acting on the vehicle, and the support for the large external force (reaction force) must be large. When the leaf spring is bent, the displacement due to external force is increased and the rigidity is increased, so the state of the suspension is hardened and stability can be utilized.

한편, 본 발명은 상기한 실시 예에 한정되지 않으며, 특허청구범위에서 청구된 본 발명의 요지를 벗어남이 없이 당해 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양하게 변형 실시할 수 있는 것은 물론이고, 그와 같은 변경은 기재된 청구범위 내에 있게 된다. On the other hand, the present invention is not limited to the above-described embodiment, and those skilled in the art to which the present invention pertains without departing from the gist of the invention claimed in the claims can be variously modified. Of course, such changes are intended to be within the scope of the claims set forth.

이상에서 설명한 바와 같이, 본 발명에 따른 리프스프링의 강성 조절 장치는 공차 상태 또는 가벼운 짐 적재시 외력의 변화를 감지하여 리프스프링의 길이를 조절함으로써 리프스프링의 반력이 작아짐에 따라 강성이 감소되어 부드러운 승차감을 유지하는 효과가 있다.As described above, the stiffness adjustment device of the leaf spring according to the present invention by adjusting the length of the leaf spring by detecting the change in the external force during tolerance or light load load, the rigidity is reduced as the reaction force of the leaf spring is reduced to smooth It is effective to maintain a riding comfort.

또한, 무거운 짐 적재시 또는 험로 주행시 외력의 변화를 감지하여 리프스프링의 길이를 조절함으로써 리프스프링의 반력이 커짐에 따라 강성의 증가해 외력이 프레임으로 직접 전달되는 것을 막고, 승차감을 향상시키는 효과가 있다.In addition, by adjusting the length of the leaf spring by detecting the change of external force when loading heavy loads or when driving on a rough road, the rigidity increases as the reaction force of the leaf spring increases, preventing external force from being transmitted directly to the frame, and improving riding comfort. have.

Claims (2)

차량의 사이드 프레임(100)의 하측에 설치되는 리프스프링(230), 상기 리프스프링의 일단에 결합되어 상기 리프스프링을 상기 사이드 프레임에 고정시키는 새클(210), 상기 리프스프링의 타단에 결합되어 상기 리프스프링을 상기 사이드 프레임에 결합시키는 브라켓(220)이 구비된 리프스프링 조립체(200)에 있어서,A leaf spring 230 installed below the side frame 100 of the vehicle, a sackle 210 coupled to one end of the leaf spring to fix the leaf spring to the side frame, and coupled to the other end of the leaf spring. In the leaf spring assembly 200 having a bracket 220 for coupling the leaf spring to the side frame, 상기 브라켓(220)은 상기 사이드 프레임(100)의 길이 방향으로 움직일 수 있도록 상기 사이드 프레임(100)의 하측에 연결 설치 되고,The bracket 220 is connected to the lower side of the side frame 100 so as to move in the longitudinal direction of the side frame 100, 상기 사이드 프레임(100) 하측에 설치되되 상기 브라켓(220)의 상부에 위치하는 랙기어(312), 상기 브라켓(220)에 지지되며 랙기어(312)와 맞물려 회전하면서 상기 브라켓(220)을 이동시키는 웜기어(316), 상기 웜기어(316)에 연결 설치되어 상기 웜기어(316)를 정방향 또는 역방향으로 구동시키는 구동모터(318)를 포함하는 구동부(310);It is installed on the lower side of the side frame 100, the rack gear 312 located on the upper portion of the bracket 220, the bracket 220 is supported by the rack gear 312 while moving the bracket 220 while rotating A driving unit 310 connected to the worm gear 316 and the worm gear 316 to drive the worm gear 316 in a forward or reverse direction; 차량에 설치되어 차량의 하중이나 외력을 변화를 감지하는 감지센서(320); 및A detection sensor 320 installed in the vehicle to detect a change in the load or external force of the vehicle; And 상기 감지센서(320)에 연결되어 감지센서(320)가 감지한 신호 변화에 의해 웜기어(316)가 회전할 수 있도록 구동모터(318)를 컨트롤함으로써 상기 사이드 프레임(100)의 길이 방향으로 리프스프링(230)의 길이 변화를 가능하게 하는 제어부(330)를 포함하여 구성되는 것을 특징으로 하는 리프스프링의 강성 조절 장치(300). The leaf spring is connected to the sensor 320 to control the driving motor 318 to rotate the worm gear 316 according to a signal change detected by the sensor 320 in the longitudinal direction of the side frame 100. Stiffness adjustment device 300 of the leaf spring, characterized in that it comprises a control unit 330 to enable the change of the length (230). 제 1항에 있어서,The method of claim 1, 상기 구동부(310)는 랙기어(312)를 지지할 수 있도록 상기 사이드 프레임(100)에 고정 설치된 가이드레일(314)을 더 포함하는 리프스프링의 강성 조절 장치(300).The driving unit 310 further includes a guide rail 314 fixed to the side frame 100 so as to support the rack gear 312 rigidity control device of the leaf spring (300).
KR1020060078201A 2006-08-18 2006-08-18 A stiffness control apparatus of a leaf spring KR101189361B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102555721A (en) * 2010-12-28 2012-07-11 通用汽车环球科技运作有限责任公司 Vehicle with a leaf spring element for the spring suspension of the vehicle
CN110949510A (en) * 2019-11-27 2020-04-03 云南夏远新能源发展有限责任公司 New energy automobile chassis
CN111999022A (en) * 2020-09-11 2020-11-27 合肥工业大学 Suspension system test bed with adjustable rigidity of transverse plate spring
CN113815362A (en) * 2020-06-03 2021-12-21 合肥工业大学 Leaf spring suspension system

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Publication number Priority date Publication date Assignee Title
KR101846869B1 (en) * 2012-12-17 2018-04-09 현대자동차 주식회사 Leaf spring mounting device for vehicle
KR102573986B1 (en) 2017-01-19 2023-09-01 인하대학교 산학협력단 Leaf spring using magneto - rheological elastomer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102555721A (en) * 2010-12-28 2012-07-11 通用汽车环球科技运作有限责任公司 Vehicle with a leaf spring element for the spring suspension of the vehicle
CN110949510A (en) * 2019-11-27 2020-04-03 云南夏远新能源发展有限责任公司 New energy automobile chassis
CN113815362A (en) * 2020-06-03 2021-12-21 合肥工业大学 Leaf spring suspension system
CN113815362B (en) * 2020-06-03 2024-05-14 合肥工业大学 Leaf spring suspension system
CN111999022A (en) * 2020-09-11 2020-11-27 合肥工业大学 Suspension system test bed with adjustable rigidity of transverse plate spring

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