KR102244859B1 - Axle assembly of electric vehicle with shock absorbing member - Google Patents

Axle assembly of electric vehicle with shock absorbing member Download PDF

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Publication number
KR102244859B1
KR102244859B1 KR1020190152636A KR20190152636A KR102244859B1 KR 102244859 B1 KR102244859 B1 KR 102244859B1 KR 1020190152636 A KR1020190152636 A KR 1020190152636A KR 20190152636 A KR20190152636 A KR 20190152636A KR 102244859 B1 KR102244859 B1 KR 102244859B1
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South Korea
Prior art keywords
absorbing member
axle
shock absorbing
leaf spring
shock
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KR1020190152636A
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Korean (ko)
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KR102244859B9 (en
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이욱성
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주식회사 디아이씨
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Publication of KR102244859B9 publication Critical patent/KR102244859B9/en

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    • 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
    • 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
    • B60G13/00—Resilient suspensions characterised by arrangement, location or type of vibration dampers
    • B60G13/001—Arrangements for attachment of dampers
    • B60G13/003—Arrangements for attachment of dampers characterised by the mounting on the vehicle body or chassis of the damper unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
    • B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
    • B60G15/067—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper characterised by the mounting on the vehicle body or chassis of the spring and damper unit
    • 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
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/128—Damper mount on vehicle body or chassis
    • 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
    • B60G2204/14—Mounting of suspension arms
    • B60G2204/143—Mounting of suspension arms on the vehicle body or chassis
    • B60G2204/1432—Mounting of suspension arms on the vehicle body or chassis by vertical bolts or studs
    • 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
    • B60G2204/4306—Bracket or knuckle for rigid axles, e.g. for clamping
    • B60G2204/43065—U-shaped bolts crossing each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2300/00—Indexing codes relating to the type of vehicle
    • B60G2300/50—Electric vehicles; Hybrid vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2600/00—Indexing codes relating to particular elements, systems or processes used on suspension systems or suspension control systems
    • B60G2600/02—Retarders, delaying means, dead zones, threshold values, cut-off frequency, timer interruption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/91—Electric vehicles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

The present invention relates to an axle device for an electric vehicle and, more specifically, to an axle device for an electric vehicle having a shock absorbing member to absorb vibration and shock transmitted from a road surface to the axle device during driving. The axle device (100) of an electric vehicle having a shock absorbing member of the present invention comprises: a drive motor (110); a speed reducer (120) coupled to the drive motor; an axle beam (130) integrally supporting the drive motor and the speed reducer; an axle shaft (140) transmitting decelerated power from the speed reducer to a wheel hub (150); a first shock absorbing member (200) installed in a chassis frame of the vehicle to absorb vibration and shock transmitted to the drive motor, the speed reducer, the axle beam, and the axle shaft; and a second shock absorbing member (300) absorbing the residual vibration and shock transmitted from the axle beam to the drive motor (110).

Description

충격흡수부재를 구비한 전기자동차의 액슬장치{Axle assembly of electric vehicle with shock absorbing member}Axle assembly of electric vehicle with shock absorbing member

본 발명은 전기자동차의 액슬장치에 관한 것으로서, 보다 상세하게는 주행 중 노면으로부터 액슬장치로 전달되는 진동 및 충격을 흡수할 수 있도록 충격흡수부재를 구비한 전기자동차의 액슬장치에 관한 것이다.The present invention relates to an axle device of an electric vehicle, and more particularly, to an axle device of an electric vehicle having a shock absorbing member to absorb vibration and shock transmitted from the road surface to the axle device during driving.

환경오염, 이산화탄소로 인한 지구온난화, 오존 생성 등으로 인한 호흡기 질환 유발 등과 같은 많은 문제점을 가지고 있다. 그리고, 지구상에 존재하는 화석연료는 한정되어 있기 때문에 언젠가는 고갈될 위기에 처해 있다.It has many problems, such as causing respiratory diseases due to environmental pollution, global warming due to carbon dioxide, and ozone generation. And because the fossil fuels that exist on Earth are limited, they are in danger of being depleted one day.

상기한 문제점을 해결하기 위하여, 구동모터를 구동시켜 주행하는 순수 전기자동차(Electric Vehicle,EV)나, 엔진과 구동모터로 주행하는 하이브리드 자동차(Hybrid Electric Vehicle,HEV), 연료전지에서 생성되는 전력으로 구동모터를 구동시켜 주행하는 연료전지 자동차(Fuel Cell Electric Vehicle,FCEV) 등과 같은 전기자동차가 개발되어 왔다.In order to solve the above problems, electric vehicles (EV) driven by driving a driving motor, hybrid electric vehicles (HEV) driven by an engine and a driving motor, and electric power generated from a fuel cell are used. Electric vehicles such as fuel cell electric vehicles (FCEV) that drive by driving a driving motor have been developed.

통상적으로 전기자동차에는 차량을 구동시키기 위한 구동모터와 더불어 구동모터에 전력을 공급하기 위한 배터리가 탑재되는데, 배터리의 전원이 구동모터에서 기계적인 회전력으로 변환되어 감속기로 전달되고, 차동기구를 거쳐 최종적으로 휠(Wheel)을 구동시킴으로써 차량이 전진 또는 후진하게 된다.In general, electric vehicles are equipped with a drive motor to drive the vehicle and a battery to supply power to the drive motor. By driving the wheel, the vehicle moves forward or backward.

본 발명은 주행 중 노면으로부터 전달되는 진동 및 충격을 효과적으로 흡수할 수 있는 충격흡수부재를 구비한 전기자동차의 액슬장치를 제공함에 있다.The present invention is to provide an axle device for an electric vehicle having a shock absorbing member capable of effectively absorbing vibrations and shocks transmitted from the road surface while driving.

상기 목적을 달성하기 위해, 본 발명의 충격흡수부재를 구비한 전기자동차의 액슬장치는 구동모터와, 상기 구동모터와 결합된 감속기와, 상기 구동모터와 감속기를 일체로 지지하는 액슬빔과, 상기 감속기로부터 감속된 동력을 휠허브로 전달하는 액슬샤프트와, 차량의 섀시 프레임에 설치되어 상기 구동모터와 감속기와 액슬빔과 액슬샤프트로 전달되는 진동 및 충격을 흡수하는 제1충격흡수부재와, 상기 액슬빔으로부터 상기 구동모터로 전달되는 잔여 진동 및 충격을 흡수하는 제2충격흡수부재를 포함한다.In order to achieve the above object, an axle device of an electric vehicle having a shock absorbing member of the present invention includes a drive motor, a reducer coupled to the drive motor, an axle beam integrally supporting the drive motor and the reducer, and the An axle shaft that transmits the reduced power from the reducer to the wheel hub, and a first shock absorbing member installed on the chassis frame of the vehicle to absorb vibration and shock transmitted to the drive motor, the reducer, the axle beam and the axle shaft, and the And a second shock absorbing member absorbing residual vibration and shock transmitted from the axle beam to the driving motor.

또한, 상기 제1충격흡수부재는 양단이 상기 섀시프레임에 고정되고 중앙 하부가 감속기와 휠허브 사이 구간에 고정되어 상하방향으로 작용하는 진동 및 충격을 흡수하는 한 쌍의 리프스프링과, 상단이 차량의 전후방향으로 나란하게 설치되는 상기 섀시 프레임의 사이드레일에 결합되고 하단이 상기 액슬빔의 전단에 결합되어 상기 리프스프링에 작용하는 진동 및 충격을 흡수하는 한 쌍의 쇼크업쇼버와, 양단이 각 샤시프레임에 고정되고 중앙부가 섀시프레임들 사이를 가로지르면서 상기 액슬빔의 후단에 고정되어 상기 액슬빔으로 전달되는 비틀림 하중을 흡수하는 스테빌라이저바를 구비할 수 있다.In addition, the first shock absorbing member has a pair of leaf springs having both ends fixed to the chassis frame and a central lower portion fixed to the section between the speed reducer and the wheel hub to absorb vibrations and shocks acting in the vertical direction, and the upper end of the vehicle A pair of shock absorbers that are coupled to the side rails of the chassis frame, which are installed side by side in the front and rear directions of the chassis, and the lower end is coupled to the front end of the axle beam to absorb vibration and shock acting on the leaf spring, and both ends are each A stabilizer bar may be provided that is fixed to the chassis frame and is fixed to the rear end of the axle beam while crossing between the chassis frames and absorbs a torsional load transmitted to the axle beam.

이 경우, 상기 감속기와 휠허브 사이를 통과하는 액슬샤프트는 상기 감속기와 일체로 성형된 보호커버를 통해 보호되며, 상기 보호커버의 상면에는 리프스프링이 지지되는 리프스프링 착좌면이 형성되고, 상기 리프스프링 착좌면에는 리프스프링을 결속시키는 U볼트가 체결될 수 있다.In this case, the axle shaft passing between the reducer and the wheel hub is protected by a protective cover integrally formed with the reducer, and a leaf spring seating surface on which the leaf spring is supported is formed on the upper surface of the protective cover, and the leaf A U-bolt that binds the leaf spring may be fastened to the spring seating surface.

한편, 상기 U볼트의 내측 상단에는 리프스프링의 상면에 밀착되는 가압밀착편이 구비되는 것이 바람직하다.On the other hand, it is preferable that the inner upper end of the U-bolt is provided with a pressure contact piece that is in close contact with the upper surface of the leaf spring.

이 경우, 상기 가압밀착편은 U볼트의 내측 상단에 밀착되는 반구형의 상단부와 리프스프링의 상면을 따라 밀착되는 하단부를 구비하며, 상기 상단부에는 U볼트의 이탈을 막아주는 U볼트 안착홈이 형성된 충격흡수부재를 구비할 수 있다.In this case, the pressure contact piece has a hemispherical upper end in close contact with the inner upper end of the U bolt and a lower end in close contact along the upper surface of the leaf spring, and the upper end has a U-bolt seating groove that prevents the separation of the U-bolt. It may be provided with an absorbent member.

또한, 상기 U볼트는 전후방향으로 복수로 구비되고, 각 U볼트들의 가압밀착편들은 상기 리프스프링의 상면을 길이방향으로 밀착하는 연결패널을 통해 일체로 결합될 수 있다.In addition, the U-bolts are provided in a plurality of front and rear directions, and the pressure-contact pieces of each of the U-bolts may be integrally coupled through a connection panel that closely contacts the upper surface of the leaf spring in the longitudinal direction.

한편, 상기 제2충격흡수부재는 상기 구동모터와 액슬빔에 상하로 마주하도록 형성된 각 대향면 사이에 설치되는 탄성 몸체부와, 상기 탄성 몸체부의 중앙을 관통하는 스터드볼트와, 상기 스터드볼트에 체결되는 조임너트를 구비한 인슐레이터인 충격흡수부재를 구비할 수 있다.On the other hand, the second shock absorbing member has an elastic body portion installed between each opposing surface formed to face the driving motor and the axle beam vertically, a stud bolt penetrating the center of the elastic body portion, and fastened to the stud bolt It may be provided with a shock absorbing member that is an insulator provided with a tightening nut.

상기와 같이 구성된 본 발명은 구동모터와 감속기와 액슬빔과 액슬샤프트와 휠허브가 일체로 조립된 대형의 고중량체임에도 불구하고 양측과 전방과 후방에서 각각 독립적으로 작동하는 제1충격흡수부재에 의하여 안정된 자세를 유지하면서 노면으로부터 전달되는 진동과 충격을 효과적으로 흡수할 수 있다.The present invention configured as described above is provided by a first shock absorbing member that operates independently from both sides, front and rear, despite being a large, heavy body in which a drive motor, a reducer, an axle beam, an axle shaft, and a wheel hub are integrally assembled. It can effectively absorb vibrations and shocks transmitted from the road surface while maintaining a stable posture.

아울러, 본 발명은 구동모터와 액슬빔 사이에 설치된 제2충격흡수부재를 통해 구동모터에서 발생되는 미세진동과 함께 액슬빔을 통해 구동모터로 전달되는 잔여 진동 및 충격을 효과적으로 흡수할 수 있다.In addition, the present invention can effectively absorb residual vibrations and shocks transmitted to the driving motor through the axle beams along with micro vibrations generated from the driving motor through the second shock absorbing member installed between the driving motor and the axle beam.

도 1은 본 발명에 따른 충격흡수부재를 구비한 전기자동차의 액슬장치의 후방사시도.
도 2는 본 발명에 따른 충격흡수부재를 구비한 전기자동차의 액슬장치의 전방사시도.
도 3은 본 발명에 따른 충격흡수부재를 구비한 전기자동차의 액슬장치의 저면사시도.
도 4는 본 발명을 구성하는 리프스프링의 설치 상태를 나타내는 요부사시도.
도 5는 본 발명을 구성하는 리프스프링의 설치 상태를 나타내는 요부분해사시도.
도 6은 본 발명을 구성하는 제2충격흡수부재의 사용상태사시도.
도 7은 본 발명을 구성하는 감속기의 내부구성을 나타내는 사시도.1 is a rear perspective view of an axle device of an electric vehicle having a shock absorbing member according to the present invention.
2 is a front perspective view of an axle device of an electric vehicle having a shock absorbing member according to the present invention.
3 is a bottom perspective view of an axle device of an electric vehicle having a shock absorbing member according to the present invention.
Fig. 4 is a perspective view showing a main part showing an installation state of a leaf spring constituting the present invention.
Fig. 5 is a partial perspective view showing an installation state of a leaf spring constituting the present invention.
Figure 6 is a perspective view of the state of use of the second shock absorbing member constituting the present invention.
7 is a perspective view showing the internal configuration of a speed reducer constituting the present invention.

본 발명의 특징 및 이점들은 첨부도면에 의거한 다음의 바람직한 실시예에 대한 상세한 설명으로 더욱 명백해질 것이다. 이에 앞서, 본 명세서 및 청구범위에 사용된 용어나 단어는 발명자가 그 자신의 발명을 가장 최선의 방법으로 설명하기 위해 용어의 개념을 적절하게 정의할 수 있다는 원칙에 입각하여 본 발명의 기술적 사상에 부합하는 의미와 개념으로 해석되어야만 한다.Features and advantages of the present invention will become more apparent from the detailed description of the following preferred embodiments based on the accompanying drawings. Prior to this, terms or words used in the present specification and claims are based on the principle that the inventor can appropriately define the concept of the term in order to describe his or her invention in the best way. It must be interpreted as a corresponding meaning and concept.

이하, 본 발명의 일 실시예를 도면을 참조하여 상세히 설명함에 있어, 동일한 구성에 대해서는 동일한 부호를 사용하며, 명료성을 위하여 가능한 중복되지 않게 상이한 부분만을 주로 설명한다.Hereinafter, in describing an embodiment of the present invention in detail with reference to the drawings, the same reference numerals are used for the same configuration, and only different parts will be mainly described so as not to overlap as possible for clarity.

도 1 내지 도 3에 도시된 바와 같이, 본 발명의 충격흡수부재를 구비한 전기자동차의 액슬장치(100)는 구동모터(110)와 감속기(120)와 액슬빔(130)과 액슬샤프트(140)와 휠허브(150)를 기본적으로 구비한다.1 to 3, the axle device 100 of an electric vehicle having a shock absorbing member of the present invention includes a drive motor 110, a reducer 120, an axle beam 130, and an axle shaft 140. ) And a wheel hub 150 are basically provided.

상기 구동모터(110)는 차량에 설치된 배터리로부터 전원을 공급받아 휠을 회전시키는 구동력을 발생시키며, 좌측 휠과 우측 휠에 각각 구동력을 부여할 수 있도록 좌우 한 쌍으로 구성된다.The driving motor 110 receives power from a battery installed in the vehicle to generate a driving force to rotate the wheel, and is composed of a pair of left and right so as to provide driving force to the left wheel and the right wheel, respectively.

상기 감속기(120)는 각 구동모터(110)의 측부에 일체로 결합되어 상기 구동모터(110)의 회전속도를 감소시킨다.The reducer 120 is integrally coupled to the side of each driving motor 110 to reduce the rotational speed of the driving motor 110.

상기 액슬빔(130)은 구동모터(110)와 감속기(120)의 하부에 결합되어 상기 구동모터(110)와 감속기(120)를 일체로 지지한다.The axle beam 130 is coupled to the lower portion of the drive motor 110 and the reducer 120 to integrally support the drive motor 110 and the reducer 120.

그리고, 상기 액슬샤프트(140)는 감속기(120)로부터 감속된 동력을 휠허브(150)로 전달하며, 상기 감속기(120)의 보호커버(121)에 감싸여져 외부로부터 보호된다.In addition, the axle shaft 140 transmits the reduced power from the speed reducer 120 to the wheel hub 150, and is wrapped in the protective cover 121 of the speed reducer 120 to be protected from the outside.

본 발명에 따르면, 차량에 설치되는 섀시 프레임에는 상기 액슬샤프트(140) 및 액슬빔(130)으로 전달되는 진동 및 충격을 흡수하는 제1충격흡수부재(200)가 설치된다.According to the present invention, a first shock absorbing member 200 for absorbing vibration and shock transmitted to the axle shaft 140 and the axle beam 130 is installed on a chassis frame installed in a vehicle.

이 경우, 상기 제1충격흡수부재(200)는 상하방향의 진동과 충격을 흡수하는 한 쌍의 리프스프링(210)과, 상기 리프스프링(210)에 작용하는 진동 및 충격을 흡수하는 한 쌍의 쇼크업쇼버(220)와, 상기 액슬빔(130)으로 전달되는 비틀림 하중을 흡수하는 단일의 스테빌라이저바(230)를 구비할 수 있다.In this case, the first shock absorbing member 200 includes a pair of leaf springs 210 for absorbing vibrations and shocks in the vertical direction, and a pair of leaf springs 210 for absorbing vibrations and shocks acting on the leaf springs 210. A shock absorber 220 and a single stabilizer bar 230 for absorbing torsional load transmitted to the axle beam 130 may be provided.

도 4 및 도 5에 도시된 바와 같이, 상기 리프스프링(210)은 판상으로 이루어진 복수의 리프(211)들이 상하로 적층된 겹판스프링으로서, 전후로 나란하게 설치되는 섀시 프레임의 사이드레일(C)에 후단이 고정되고 전단은 상기 사이드레일(C)들을 가로지르는 크로스멤버(미도시)에 결합된다. 그리고 상기 리프스프링(210)의 중앙은 감속기(120)와 휠허브(150) 사이 구간에 고정된다.As shown in FIGS. 4 and 5, the leaf spring 210 is a leaf spring in which a plurality of leaf 211 made of a plate shape are stacked vertically. The rear end is fixed and the front end is coupled to a cross member (not shown) crossing the side rails (C). And the center of the leaf spring 210 is fixed in the section between the reducer 120 and the wheel hub 150.

한편, 상기 리프스프링(210)의 중앙은 액슬빔(130)을 감싸는 감속기(120)의 보호커버(121)의 상면에 고정된 U볼트(212)를 통해 뒤틀림이 방지되도록 고정되는 것이 바람직하다.On the other hand, the center of the leaf spring 210 is preferably fixed to prevent distortion through a U bolt 212 fixed to the upper surface of the protective cover 121 of the reducer 120 surrounding the axle beam 130.

이 경우, 상기 리프스프링(210)이 고정되는 보호커버(121)의 상면에는 리프스프링(210)의 하면을 안정적으로 지지하는 리프스프링 착좌면(122)이 형성되고, 상기 보호커버(121)에는 리프스프링 착좌면(122)과 인접하게 U볼트 통과공(123)이 형성된다. 상기 U볼트 통과공(123)을 통과한 상기 U볼트(212)의 하단에는 너트(213)가 체결된다.In this case, a leaf spring seating surface 122 stably supporting the lower surface of the leaf spring 210 is formed on the upper surface of the protective cover 121 to which the leaf spring 210 is fixed, and the protective cover 121 has A U bolt through hole 123 is formed adjacent to the leaf spring seating surface 122. A nut 213 is fastened to the lower end of the U-bolt 212 that has passed through the U-bolt through hole 123.

한편, 상기 U볼트(212)의 내측 상단에는 리프스프링(210)의 상면을 통해 밀착 가압하는 가압밀착편(214)이 구비되는 것이 바람직하다.On the other hand, it is preferable that the inner upper end of the U-bolt 212 is provided with a pressurized contact piece 214 that pressurizes through the upper surface of the leaf spring 210.

이 경우, 상기 가압밀착편(214)은 U볼트(212)의 내측 상단에 밀착되는 반구형의 상단부(214a)와, 리프스프링(210)의 상면을 좌우방향으로 가로지르면서 밀착되는 하단부(214b)를 구비할 수 있다. 그리고, 상기 상단부(214a)에는 U볼트(212)의 이탈을 막아주는 U볼트 안착홈(214c)이 형성된다.In this case, the pressing contact piece 214 has a hemispherical upper end 214a that is in close contact with the inner upper end of the U bolt 212 and a lower end 214b that is in close contact while crossing the upper surface of the leaf spring 210 in the left and right directions. It can be provided with. In addition, a U-bolt seating groove 214c is formed in the upper end portion 214a to prevent the U-bolt 212 from being separated.

이와 같이, U볼트(212)에 가압밀착편(214)이 구비되면 리프스프링(210)의 상면이 좌우방향으로 균일하게 가압되므로 상기 리프스프링(210)는 좌우로 뒤틀리지 않고 안정적으로 결속될 수 있다.In this way, when the U-bolt 212 is provided with the pressurized contact piece 214, the upper surface of the leaf spring 210 is uniformly pressed in the left and right directions, so that the leaf spring 210 can be stably bound without being twisted from side to side. have.

한편, 상기 U볼트(212)는 보다 확실하게 리프스프링(210)을 결속시킬 수 있도록 리프스프링(210)을 따라 전후방향으로 복수로 구비될 수도 있다.Meanwhile, the U-bolts 212 may be provided in plural in the front and rear directions along the leaf spring 210 so as to more reliably bind the leaf spring 210.

이 경우, 각 U볼트(212)들의 가압밀착편(214)들의 사이에는 연결패널(215)이 설치된다. 상기 연결패널(215)은 리프스프링(210)의 상면을 길이방향으로 밀착하면서 양단부가 마주하는 가압밀착편(214)들의 내측면을 지지하는 형태로 결합되어 상기 리프스프링(210)에 대한 가압밀착력과 함께 가압밀착편(214)의 구조적 안전성을 향상시킨다.In this case, a connection panel 215 is installed between the pressing pieces 214 of each of the U bolts 212. The connection panel 215 is coupled in a form that adheres to the upper surface of the leaf spring 210 in the longitudinal direction and supports the inner surfaces of the pressure contact pieces 214 facing each other, and the pressure contact force to the leaf spring 210 Together with it improves the structural safety of the pressure contact piece 214.

상기 쇼크업쇼버(220)는 상단이 상기 섀시 프레임의 사이드레일(C)에 결합되고 하단이 상기 액슬빔(130)의 전단에 결합되어 상기 리프스프링(210)에 작용하는 진동 및 충격을 흡수해 준다.The shock absorber 220 has an upper end coupled to the side rail C of the chassis frame and a lower end coupled to the front end of the axle beam 130 to absorb vibration and shock acting on the leaf spring 210. give.

이 경우, 상기 액슬빔(130)의 전단의 좌측과 우측에는 각각 쇼크업쇼버(220)의 하단을 회전 가능하게 결합하는 힌지결합부(131)가 형성된다.In this case, hinge coupling portions 131 rotatably coupled to the lower end of the shock absorber 220 are formed on the left and right sides of the front end of the axle beam 130, respectively.

상기 스테빌라이저바(230)는 양단이 각 샤시 프레임의 사이드레일(C)에 고정되고 중앙부가 섀시 프레임들의 사이드레일(C)사이를 가로지르면서 상기 액슬빔(130)의 후단에 고정되어 주행 중 선회하는 차량의 원심력에 의하여 차체가 기울어지면서 상기 액슬빔(130)으로 전달되는 비틀림 하중을 흡수해 준다.Both ends of the stabilizer bar 230 are fixed to the side rails (C) of each chassis frame, and the central portion is fixed to the rear end of the axle beam 130 while crossing between the side rails (C) of the chassis frames. As the vehicle body is inclined by the centrifugal force of the turning vehicle, it absorbs the torsional load transmitted to the axle beam 130.

이 경우, 상기 액슬빔(130)의 후단에는 스테빌라이저바(230)의 중앙부를 감싸 고정하는 스테빌라이저바 고정브라켓(132)이 좌측과 우측에 각각 형성된다. 상기 스테빌라이저바 고정브라켓(132)에는 스테빌라이저바(230)의 중앙부가 통과할 수 있도록 관통공이 형성된다.In this case, at the rear end of the axle beam 130, stabilizer bar fixing brackets 132 surrounding and fixing the central portion of the stabilizer bar 230 are formed on the left and the right, respectively. A through hole is formed in the stabilizer bar fixing bracket 132 to allow the central portion of the stabilizer bar 230 to pass therethrough.

본 발명에 따르면, 상기 액슬빔(130)으로부터 상기 구동모터(110)로 전달되는 잔여 진동 및 충격을 흡수하는 제2충격흡수부재(300)가 구비된다.According to the present invention, a second shock absorbing member 300 for absorbing residual vibration and shock transmitted from the axle beam 130 to the driving motor 110 is provided.

상기 제2충격흡수부재(300)는 구동모터(110)의 전방과 후방에서 전달되는 진동과 충격을 균일하게 흡수할 수 있도록 구동모터(110)의 전단 좌측과 우측, 그리고 구동모터(110)의 후단의 좌측과 우측에 구비되는 것이 바람직하다.The second shock absorbing member 300 is the front left and right side of the driving motor 110 and the driving motor 110 so as to uniformly absorb the vibration and shock transmitted from the front and the rear of the driving motor 110. It is preferable to be provided on the left and right sides of the rear end.

이 경우, 상기 제2충격흡수부재(300)는 구동모터(110)와 액슬빔(130)의 상하로 마주하는 각 대향면(111,313) 사이에 설치된 탄성재질의 인슐레이터(310)와, 상기 인슐레이터(310)의 중앙을 관통하는 스터드볼트(320)와 상기 스터드볼트(320)에 체결되는 조임너트(330)를 구비할 수 있다.In this case, the second shock absorbing member 300 includes an elastic material insulator 310 installed between the driving motor 110 and the respective opposing surfaces 111 and 313 facing upward and downward of the axle beam 130, and the insulator ( A stud bolt 320 penetrating through the center of 310) and a tightening nut 330 fastened to the stud bolt 320 may be provided.

상기 대향면은 구동모터(110)의 전단 좌측과 우측, 그리고 후단 좌측과 우측에 형성되어 인슐레이터(310)의 상단을 밀착 지지하는 상부대향면(111)과, 상기 액슬빔(130)의 전단과 후단에 형성되어 인슐레이터(310)의 하단을 지지하는 하부대향면(133)으로 구성된다.The facing surface is formed on the left and right front ends of the driving motor 110 and on the left and right sides of the rear end to closely support the upper end of the insulator 310, and the front end of the axle beam 130 and It is formed at the rear end and consists of a lower facing surface 133 supporting the lower end of the insulator 310.

상기 상부대향면(111)의 중앙에는 볼트관통공이 형성되고 상기 하부대향면(133)의 중앙에는 볼트체결홈이 형성된다.A bolt through hole is formed in the center of the upper facing surface 111 and a bolt fastening groove is formed in the center of the lower facing surface 133.

따라서, 상기 상부대향면(111)과 하부대향면(133) 사이에 인슐레이터(310)를 삽입한 상태에서 상기 상부대향면(111)의 볼트관통공으로 스터드볼트(320)를 삽입하여 하부대향면(133)의 볼트체결홈에 체결한 다음, 상부대향면(111)의 상부로 돌출된 스터드볼트(320)의 상부에 조임너트(330)를 체결하면 제2충격흡수부재(300)의 설치가 완료된다.Therefore, in a state in which the insulator 310 is inserted between the upper facing surface 111 and the lower facing surface 133, the stud bolt 320 is inserted into the bolt through hole of the upper facing surface 111 to insert the lower facing surface ( After fastening to the bolt fastening groove of 133), the installation of the second shock absorbing member 300 is completed by fastening the tightening nut 330 to the top of the stud bolt 320 protruding to the top of the upper facing surface 111. do.

작업자는 상기 조임너트(330)의 조임정도를 달리해 가면서 상기 인슐레이터(310)가 차량의 주행조건에 부합하는 적정한 인장강도를 갖도록 조절해 줄 수 있다.The operator may adjust the insulator 310 to have an appropriate tensile strength corresponding to the driving condition of the vehicle while varying the degree of tightening of the tightening nut 330.

이와 같이 구성된 본 발명의 충격흡수부재를 구비한 전기자동차의 액슬장치(100)는 차량의 섀시 프레임에 설치된 제1충격흡부재(200)와 다이렉트로 결합되어 주행시 노면으로부터 전달되는 수직방향의 진동 및 충격 및 비틀림 하중을 효과적으로 흡수할 수 있게 된다.The axle device 100 of an electric vehicle having a shock absorbing member of the present invention configured as described above is directly coupled to the first shock absorbing member 200 installed on the chassis frame of the vehicle, and the vibration in the vertical direction transmitted from the road surface during driving and It is possible to effectively absorb impact and torsional loads.

즉, 본 발명의 액슬장치(100)는 제1충격흡수부재(200)의 좌측과 우측의 감속기(120)와 휠허브(150) 사이 구간에 결합된 한 쌍의 리프스프링(210)을 통해 상하방향으로 작용하는 진동과 충격이 흡수되고, 충격 흡수과정에서 발생되는 상기 리프스프링(210)의 진동과 충격은 액슬빔(130)의 전방 좌측과 우측에 결합된 한 쌍의 쇼크업쇼버(220)를 통해 흡수되며, 노면으로부터 전달되는 뒤틀림 충격은 액슬빔(130)의 후방에 결합된 스테빌라이저바(230)를 통해 흡수가 이루어지게 된다.That is, the axle device 100 of the present invention is up and down through a pair of leaf springs 210 coupled to the section between the reducer 120 on the left and right of the first shock absorbing member 200 and the wheel hub 150. The vibration and shock acting in the direction are absorbed, and the vibration and shock of the leaf spring 210 generated during the shock absorption process is a pair of shock absorbers 220 coupled to the front left and right sides of the axle beam 130 The torsion shock is absorbed through and transmitted from the road surface is absorbed through the stabilizer bar 230 coupled to the rear of the axle beam 130.

이와 같이, 본 발명은 노면으로부터 전달되는 진동과 충격이 양측과 전방과 후방에서 각각 독립적으로 작동하는 제1충격흡수부재(200)의 의하여 대부분 제거될 뿐만 아니라, 구동모터(110)와 감속기(120)와 액슬빔(130)과 액슬샤프트(140)와 휠허브(150)가 일체로 조립된 대형의 중량체임에도 불구하고 안정된 자세를 유지할 수 있게 된다.As described above, in the present invention, vibrations and shocks transmitted from the road surface are mostly removed by the first shock absorbing member 200 operating independently at both sides, front and rear, as well as the driving motor 110 and the reducer 120 ), the axle beam 130, the axle shaft 140, and the wheel hub 150 are integrally assembled in a large-sized heavy body, but it is possible to maintain a stable posture.

아울러, 본 발명은 상기 제2충격흡수부재(300)를 통해 구동모터(110)의 미세진동과 함께 제1충격흡부재(200)를 통과하여 구동모터(110)로 전달되는 잔여 진동 및 충격도 효과적으로 흡수된다.In addition, the present invention is also the residual vibration and impact transmitted to the driving motor 110 through the first shock absorbing member 200 along with the fine vibration of the driving motor 110 through the second shock absorbing member 300. Is absorbed effectively.

도 7에 도시된 바와 같이, 본 발명에 따르면 상기 감속기(120)는 보호커버(121)의 내부에 장착되는 구동기어(126)와 1차감속기어(127)와 중간감속기어(128)와 2차감속기어(129)들을 구비할 수 있다.7, according to the present invention, the reducer 120 is A drive gear 126, a primary reduction gear 127, an intermediate reduction gear 128, and a secondary reduction gear 129 mounted inside the protective cover 121 may be provided.

이 경우, 상기 구동기어(126)는 구동모터(110)의 회전축에 결합되며, 상기 1차감속기어(127)는 구동기어(126)와 맞물려 회전하면서 구동기어(126)의 회전속도를 1차 감속시킨다. 그리고 상기 2차감속기어(129)는 중간감속기어(128)와 맞물려 회전하면서 1차 감속된 구동모터(110)의 회전력을 2차로 감속시킨다.In this case, the driving gear 126 is coupled to the rotational shaft of the driving motor 110, and the primary reduction gear 127 rotates while being engaged with the driving gear 126 to increase the rotational speed of the driving gear 126 first. Slow down. In addition, the secondary reduction gear 129 rotates while being engaged with the intermediate reduction gear 128 to secondarily reduce the rotational force of the driving motor 110 that has been decelerated first.

이에 따라서, 본 발명의 액슬장치(100)는 구동모터(110)의 회전속도를 2차에 걸쳐 감소시켜 일체형 감속구조를 구현함으로써 휠허브(150)의 내부구조를 단순화하는 동시에 차량의 구동공간을 콤팩트하게 구성할 수 있게 된다.Accordingly, the axle device 100 of the present invention implements an integrated deceleration structure by reducing the rotational speed of the driving motor 110 two times, thereby simplifying the internal structure of the wheel hub 150 and simultaneously reducing the driving space of the vehicle. It can be configured compactly.

또한, 본 발명은 구동모터(110)와 감속기(120)가 액슬빔(130)을 통해 일체로 지지되면서 하나의 유닛으로 패키징되므로 전체적인 사이즈가 더욱 축소된다.In addition, in the present invention, since the drive motor 110 and the reducer 120 are integrally supported through the axle beam 130 and packaged as a single unit, the overall size is further reduced.

아울러, 상기 감속기(120)는 구동기어(126)와 1차감속기어(127)와 중간감속기어(128)가 구동기어(126)와 2차감속기어(129)의 하부에 배치되어 상기 기어들(126,127,128,129)이 전체적으로 역삼각 형태를 이루도록 구성된다. 따라서, 감속기(120)의 전후방향으로의 사이즈가 축소되면서 차량의 구동공간을 더욱 콤팩트하게 구성할 수 있게 된다.In addition, in the reduction gear 120, a driving gear 126, a primary reduction gear 127, and an intermediate reduction gear 128 are disposed under the driving gear 126 and the secondary reduction gear 129, so that the gears (126,127,128,129) is composed to form an inverted triangular shape as a whole. Accordingly, as the size of the reducer 120 in the front-rear direction is reduced, the driving space of the vehicle can be more compactly configured.

이와 같이, 도면을 참조하여 본 발명의 바람직한 실시예에 대해 상술하였으나 본 발명은 전술한 실시예에 한정되지 않으며, 본 발명이 속하는 기술분야에서 통상의 지식을 가진자가 본 발명의 사상을 벗어나지 않고 변형 가능하며, 이러한 변형은 본 발명의 권리범위에 속할 것이다.As described above, preferred embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited to the above-described embodiments, and those of ordinary skill in the art to which the present invention pertains are modified without departing from the spirit of the present invention. It is possible, and such modifications will fall within the scope of the present invention.

110...구동모터 120...감속기
121...보호커버 122...리프스프링 착좌면
130...액슬빔 140...액슬샤프트
150...휠허브 200...제1충격흡수부재
210...리프스프링 212...U볼트
214...가압밀착편 214a...상단부
214b...하단부 214c...U볼트 안착홈
215...연결패널 220... 쇼크업쇼버
230...스테빌라이저바 300...제2충격흡수부재
310...인슐레이터 320...스터드볼트
330...조임너트 C...사이드레일110...drive motor 120... reducer
121...Protective cover 122...Leaf spring seating surface
130...axle beam 140...axle shaft
150...wheel hub 200...first shock absorbing member
210...leaf spring 212...U bolt
214...Pressing contact piece 214a...top part
214b...bottom part 214c...U bolt mounting groove
215... connection panel 220... shock absorber
230...Stabilizer bar 300...2nd shock absorbing member
310... insulator 320... stud bolt
330... tightening nut C... side rail

Claims (7)

구동모터;
상기 구동모터의 회전속도를 감소시키는 감속기;
상기 구동모터와 감속기를 일체로 지지하는 액슬빔;
상기 감속기로부터 감속된 동력을 휠허브로 전달하는 액슬샤프트;
차량의 섀시 프레임에 설치되어 상기 구동모터와 감속기와 액슬빔과 액슬샤프트로 전달되는 진동 및 충격을 흡수하는 제1충격흡수부재; 및
상기 구동모터의 미세진동과, 상기 액슬빔으로부터 상기 구동모터로 전달되는 잔여 진동 및 충격을 흡수하는 제2충격흡수부재를 포함하고,
상기 제2충격흡수부재는
상기 구동모터와 액슬빔에 상하로 마주하도록 형성된 각 대향면 사이에 설치되는 인슐레이터;
상기 인슐레이터의 중앙을 관통하는 스터드볼트; 및
상기 스터드볼트에 체결되는 조임너트를 구비한 충격흡수부재를 구비한 전기자동차의 액슬장치.
Drive motor;
A reducer for reducing the rotational speed of the drive motor;
An axle beam integrally supporting the drive motor and the reducer;
An axle shaft that transmits the reduced power from the reducer to the wheel hub;
A first shock absorbing member installed on a chassis frame of a vehicle to absorb vibrations and shocks transmitted to the drive motor, the speed reducer, the axle beam and the axle shaft; And
A second shock absorbing member for absorbing the fine vibration of the driving motor and residual vibration and shock transmitted from the axle beam to the driving motor,
The second shock absorbing member
An insulator installed between the driving motor and each opposing surface formed to face the axle beam vertically;
A stud bolt passing through the center of the insulator; And
An axle device of an electric vehicle having a shock absorbing member having a tightening nut that is fastened to the stud bolt.
 제 1항에 있어서,
상기 제1충격흡수부재는
차량에 설치되는 섀시 프레임에 양단이 고정되고, 중앙이 상기 감속기와 휠허브 사이 구간에 고정되어 상하방향으로 작용하는 진동 및 충격을 흡수하는 한 쌍의 리프스프링;
상단이 차량의 전후방향으로 나란하게 설치되는 상기 섀시 프레임의 사이드레일에 결합되고 하단이 상기 액슬빔의 전단에 결합되어 상기 리프스프링에 작용하는 진동 및 충격을 흡수하는 한 쌍의 쇼크업쇼버; 및
양단이 각 사이드레일에 고정되고 중앙부가 상기 사이드레일들 사이를 가로지르면서 상기 액슬빔의 후단에 고정되어 상기 액슬빔으로 전달되는 비틀림 하중을 흡수하는 스테빌라이저바를 포함하는 충격흡수부재를 구비한 전기자동차의 액슬장치.The method of claim 1,
The first shock absorbing member
A pair of leaf springs having both ends fixed to the chassis frame installed in the vehicle, the center being fixed to the section between the speed reducer and the wheel hub to absorb vibrations and shocks acting in the vertical direction;
A pair of shock absorbers having an upper end coupled to a side rail of the chassis frame installed side by side in a front and rear direction of the vehicle and a lower end coupled to a front end of the axle beam to absorb vibration and shock acting on the leaf spring; And
Electric having a shock absorbing member including a stabilizer bar that has both ends fixed to each side rail and a central portion crosses between the side rails and is fixed to the rear end of the axle beam to absorb torsional load transmitted to the axle beam Vehicle axle system. 제 2항에 있어서,
상기 감속기와 휠허브 사이를 통과하는 액슬샤프트는 상기 감속기와 일체로 성형된 보호커버를 통해 보호되며;
상기 보호커버의 상면에는 리프스프링의 중앙이 지지되는 리프스프링 착좌면이 형성되고;
상기 리프스프링 착좌면에는 리프스프링을 결속시키는 U볼트가 체결된 충격흡수부재를 구비한 전기자동차의 액슬장치.The method of claim 2,
The axle shaft passing between the speed reducer and the wheel hub is protected by a protective cover integrally formed with the speed reducer;
A leaf spring seating surface on which the center of the leaf spring is supported is formed on the upper surface of the protective cover;
An axle device of an electric vehicle having a shock absorbing member to which a U-bolt for binding the leaf spring is fastened to the seating surface of the leaf spring. 제 3항에 있어서,
상기 U볼트의 내측 상단에는 리프스프링의 상면에 밀착되는 가압밀착편이 구비된 충격흡수부재를 구비한 전기자동차의 액슬장치.The method of claim 3,
An axle device of an electric vehicle having a shock absorbing member provided with a pressure-contacting piece that is in close contact with the upper surface of the leaf spring at the inner upper end of the U-bolt. 제 4항에 있어서,
상기 가압밀착편은
U볼트의 내측 상단에 밀착되는 반구형의 상단부와 리프스프링의 상면을 따라 밀착되는 하단부를 구비하며,
상기 상단부에는 U볼트의 이탈을 막아주는 U볼트 안착홈이 형성된 충격흡수부재를 구비한 전기자동차의 액슬장치.The method of claim 4,
The pressurized contact piece
It has a hemispherical upper end in close contact with the inner upper end of the U bolt and a lower end in close contact with the upper surface of the leaf spring,
The axle device of an electric vehicle having a shock absorbing member formed with a U-bolt seating groove that prevents the U-bolt from being separated from the upper part. 제 5항에 있어서,
상기 U볼트는 전후방향으로 복수로 구비되고,
각 U볼트들의 가압밀착편들은 상기 리프스프링의 상면을 길이방향으로 밀착하는 연결패널을 통해 일체로 결합된 충격흡수부재를 구비한 전기자동차의 액슬장치.The method of claim 5,
The U-bolts are provided in plural in the front and rear directions,
The axle device of an electric vehicle having a shock absorbing member integrally coupled to each of the U bolts through a connection panel that closely contacts the upper surface of the leaf spring in the longitudinal direction. 삭제delete
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US11453288B2 (en) * 2018-06-05 2022-09-27 Ford Global Technologies, Llc Electric machine integrated axle assemblies for electrified vehicles

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