KR20090062848A - Mount of subframe for automobile - Google Patents

Mount of subframe for automobile Download PDF

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Publication number
KR20090062848A
KR20090062848A KR1020070130302A KR20070130302A KR20090062848A KR 20090062848 A KR20090062848 A KR 20090062848A KR 1020070130302 A KR1020070130302 A KR 1020070130302A KR 20070130302 A KR20070130302 A KR 20070130302A KR 20090062848 A KR20090062848 A KR 20090062848A
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KR
South Korea
Prior art keywords
rubber bush
subframe
bush
mount
frequency
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KR1020070130302A
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Korean (ko)
Inventor
하태원
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현대자동차주식회사
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Priority to KR1020070130302A priority Critical patent/KR20090062848A/en
Publication of KR20090062848A publication Critical patent/KR20090062848A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/11—Understructures, i.e. chassis frame on which a vehicle body may be mounted with resilient means for suspension, e.g. of wheels or engine; sub-frames for mounting engine or suspensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D24/00—Connections between vehicle body and vehicle frame
    • B62D24/02—Vehicle body, not intended to move relatively to the vehicle frame, and mounted on vibration absorbing mountings, e.g. rubber pads
    • 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)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Body Structure For Vehicles (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

A sub-frame mount for vehicles is provided not to generate rigid body modes in the low-frequency region by integrating a solid and a bush. A sub-frame mount for vehicles comprises: a rubber bush(11) mounted in a sub-frame(100); a spring(12) positioned in a lower part of the rubber bush in order to support it elastically; a controller to control the rubber bush to be moved up and down according to the change of transmission sounds to frequency; and an actuating unit operated by the control signal of the controller. The actuating unit consists of: a rack gear(31) formed on the circumference surface of a chamber(13) positioned between the sub-frame and the rubber bush; and a pinion gear(32) which is engaged with the rack gear and generates the power to move whole the rubber bush up and down.

Description

자동차용 서브프레임 마운트{Mount of subframe for automobile}Mount of subframe for automobile

본 발명은 자동차용 서브프레임 마운트에 관한 것으로서, 더욱 상세하게는 차체와 서브프레임에 연결되어 주파수에 대한 투과음이 모든 주파수 영역대에서 유리하도록 솔리드 및 부쉬 통합타입으로 이루어진 자동차용 서브프레임 마운트에 관한 것이다. The present invention relates to a subframe mount for a vehicle, and more particularly, to a subframe mount for automobiles, which is connected to the vehicle body and the subframe and is made of a solid and bush integrated type so that a transmission sound for frequency is advantageous in all frequency ranges. will be.

일반적으로, 서브프레임과 차체를 연결하는 서브프레임 마운트는 조향 시 이격감을 줄이고 조향 성능의 향상을 위해 강 결합하는 솔리드 타입(Solid Type)과 승차감과 NVH 개선을 위한 고무 부쉬로 체결하는 부쉬 타입(Bush Type)이 있다. In general, the subframe mount connecting the subframe and the body is a solid type that is tightly coupled to reduce the spacing during steering, and a bush type that is fastened with a rubber bush for improving the riding comfort and NVH. Type).

상기 부쉬 타입의 경우, 고 RPM대역(2000RPM이상)에서는 고무 부쉬에 의해 중/고주파(200Hz이상) 투과음 저감에 유리한 구조이나 저RPM대역(2000RPM이하)에서는 서브프레임의 강체모드(80Hz)에 의한 저주파 진동과 부밍이 악화되므로 상품성을 저해하게 된다. In the case of the bush type, the structure is advantageous for reducing the mid / high frequency (200 Hz or more) transmission sound by the rubber bush in the high RPM band (2000 RPM or more), or the rigid body mode (80 Hz) of the subframe in the low RPM band (2000 RPM or less). Low-frequency vibration and booming deteriorate, which impairs marketability.

반면 솔리드 타입의 서브프레임은 차체와의 강 결합으로 서브프레임의 저주 파 강체 모드가 발생하지 않는 장점이 있으나 고주파 투과음이 불리한 단점이 있다. On the other hand, the solid type subframe has the advantage that the low frequency rigid body mode of the subframe does not occur due to the strong coupling with the vehicle body, but the disadvantage is that the high frequency transmission sound is disadvantageous.

따라서, 본 발명은 상기와 같은 문제점을 해결하기 위하여 발명한 것으로서, 차체와 서브프레임에 연결되어 주파수에 대한 투과음이 모든 주파수 영역대에서 유리하도록 솔리드 및 부쉬 통합타입으로 이루어진 자동차용 서브프레임 마운트를 제공하고자 한다. Therefore, the present invention has been invented to solve the above problems, and is connected to the vehicle body and the subframe, the vehicle subframe mount made of solid and bush integrated type so that the transmission sound for the frequency is advantageous in all frequency ranges To provide.

상기와 같은 목적을 달성하기 위하여 본 발명은 서브프레임(100) 내에 장착된 고무 부쉬(11)와, 상기 고무 부쉬(11)의 하단부에 이를 탄성 지지하는 스프링(12)과, 주파수에 대한 투과음의 변화에 따라 상기 고무 부쉬(11)를 강제적으로 상하 이동하도록 제어하는 제어부(20)와, 상기 제어부(20)의 제어신호에 따라 작동하는 작동부(30)를 포함하여 구성된 것을 특징으로 한다.In order to achieve the above object, the present invention provides a rubber bush 11 mounted in the subframe 100, a spring 12 elastically supporting the lower end of the rubber bush 11, and a transmission sound for frequency. It characterized in that it comprises a control unit 20 for controlling the rubber bush 11 to move up and down according to the change of, and the operation unit 30 to operate in accordance with the control signal of the control unit 20.

바람직한 실시예로서, 상기 작동부(30)는 상기 서브프레임(100)과 고무 부쉬(11) 사이에 형성된 챔버(13)의 둘레면에 형성된 랙기어(31)와, 상기 랙기어에 치합되어 고무 부쉬(11) 전체를 상하 방향으로 이동시키는 동력을 발휘하는 피니언 기어(32)가 축고정된 구동모터인 것을 특징으로 한다.In a preferred embodiment, the operation unit 30 is a rack gear 31 formed on the circumferential surface of the chamber 13 formed between the subframe 100 and the rubber bush 11, the rubber gear is meshed with the rack gear The pinion gear 32 that exerts the power to move the entire bush 11 in the vertical direction is characterized in that the drive motor is axially fixed.

상기 챔버(13)는 그 내부에 피니언 기어(32)의 회전이 원활히 실시될 수 있도록 오일이 밀봉된 것을 특징으로 한다. The chamber 13 is characterized in that the oil is sealed so that the rotation of the pinion gear 32 can be performed smoothly therein.

이상에서 본 바와 같이, 본 발명에 따른 자동차용 서브프레임 마운트에 의하면, 자동차의 주행 시 발생하는 주파수에 대한 투과음의 변화에 따라 스프링의 탄성력 발휘 여부를 제어할 수 있도록 하여 주파수에 대한 투과음이 모든 주파수 영역대에서 유리한 효과가 있다.As described above, according to the vehicle subframe mount according to the present invention, it is possible to control whether the spring exerts the elastic force in accordance with the change of the transmission sound with respect to the frequency generated when the driving of the vehicle so that the transmission sound for the frequency There is a beneficial effect in all frequency ranges.

이하, 첨부도면을 참조하여 본 발명의 구성에 대해 상세하게 설명하면 다음과 같다. Hereinafter, the configuration of the present invention with reference to the accompanying drawings in detail.

첨부한 도 1 및 도 2는 본 발명에 따른 자동차용 서브프레임 마운트 중, 각각 솔리드 타입 및 부쉬 타입을 나타내는 도면이며, 도 3은 일반적인 주파수에 대한 투과음을 나타내는 그래프이다.1 and 2 are views illustrating a solid type and a bush type, respectively, of a vehicle subframe mount according to the present invention, and FIG. 3 is a graph showing transmission sound with respect to a general frequency.

자동차의 주행 시 엔진폭발의 2차 성분(C2)이 강체모드를 가진하는 구간과 강체모드를 가진 하지 않는 그 이상의 구간으로 구분되는 바, ECU에서 엔진 RPM을 판단하여 고 RPM대역(2000RPM이상)에서는 부쉬 타입의 마운트 기능을 구현하여 고주파 절연성능을 높이는 동시에, 저 RPM대역(2000RPM이하)에서는 솔리드 타입의 마운트 기능을 구현하도록 하는데 그 주안점이 있다. The secondary component (C2) of the engine explosion during driving of the vehicle is divided into a section with a rigid body mode and a section without a rigid body mode.In the ECU, the engine RPM is judged to determine a high RPM range (more than 2000 RPM). The main point is to realize the high frequency insulation performance by implementing the bush type mount function, and to implement the solid type mount function in the low RPM band (below 2000 RPM).

이를 위하여 본 발명은 서브프레임(100) 내에 장착된 고무 부쉬(11)와, 상기 고무 부쉬(11)의 하단부에 이를 탄성 지지하는 스프링(12)과, 주파수에 대한 투과음의 변화에 따라 상기 고무 부쉬(11)를 강제적으로 상하 이동하도록 제어하는 제 어부(20)와, 상기 제어부(20)의 제어신호에 따라 작동하는 작동부(30)를 포함하여 구성된다.To this end, the present invention provides a rubber bush 11 mounted in the subframe 100, a spring 12 elastically supporting the lower end of the rubber bush 11, and the rubber according to the change of the transmission sound with respect to the frequency. It includes a control unit 20 for controlling the bush 11 to move up and down forcibly, and an operating unit 30 that operates according to the control signal of the control unit 20.

이때, 상기 작동부(30)는 상기 서브프레임(100)과 고무 부쉬(11) 사이에 형성된 챔버(13)의 둘레면을 이루는 서브프레임(100) 및 고무 부쉬(11)의 벽체에 형성된 랙기어(31)와, 상기 랙기어에 치합되어 고무 부쉬(11) 전체를 상하 방향으로 이동시키는 동력을 발휘하는 피니언 기어(32)가 축고정된 구동모터인 것이 바람직하다. In this case, the operation unit 30 is a rack gear formed on the wall of the subframe 100 and the rubber bush 11 forming the circumferential surface of the chamber 13 formed between the subframe 100 and the rubber bush 11. (31) and the pinion gear 32 which is engaged with the rack gear and exerts a power to move the entire rubber bush 11 in the vertical direction are preferably a drive motor in which the shaft is fixed.

따라서, 상기 제어부(20)는 자동차의 주행 시, RPM 구간별로 구동모터의 회전을 제어하게 되는 바, 본 발명에 따른 자동차용 서브프레임 마운트는, 도 1에 도시된 바와 같이, 피니언 기어(32)를 정회전시키게 될 경우, 스프링(12)으로 지지된 고무 부쉬(11)가 하방으로 당겨져 솔리드 타입의 성능을 발휘하며, 반면에 피니언 기어(32)를 역회전시키게 될 경우, 고무 부쉬(11)가 상방으로 당겨져 부쉬 타입의 성능을 발휘하게 된다. Accordingly, the controller 20 controls the rotation of the driving motor for each RPM section when the vehicle is driven, and the subframe mount for the vehicle according to the present invention, as shown in FIG. 1, the pinion gear 32. Is rotated forward, the rubber bushing 11 supported by the spring 12 is pulled downward to exhibit a solid type performance, while when the pinion gear 32 is reversed, the rubber bushing 11 Is pulled upward to achieve bush type performance.

이때, 구조적으로는 피니언 기어(32)의 회전이 원활히 실시될 수 있도록 상기 챔버(13) 내부는 오일이 밀봉되어 있다. At this time, structurally, the oil is sealed inside the chamber 13 so that the pinion gear 32 can be rotated smoothly.

따라서, 본 발명은 차체와 서브프레임(100)에 연결되어 주파수에 대한 투과음이 모든 주파수 영역대에서 유리하도록 솔리드 및 부쉬 통합타입으로 이루어진 자동차용 서브프레임 마운트를 통해 NVH특성의 개선을 도모하고, 승차감을 향상시킬 수 있는 발명이다. Therefore, the present invention is connected to the vehicle body and the subframe 100 to improve the NVH characteristics through the vehicle subframe mount made of a solid and bush integrated type so that the transmission sound for the frequency is advantageous in all frequency ranges, The invention can improve the riding comfort.

이상에서는 본 발명의 바람직한 실시예에 대하여 도시하고 또한 설명하였으 나, 본 발명은 상기한 실시예에 한정되지 않으며, 특허청구범위에서 청구된 본 발명의 요지를 벗어남이 없이 당해 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형 실시가 가능한 것은 물론이고, 그와 같은 변경은 기재된 청구범위 내에 있게 된다.In the above described and illustrated with respect to the preferred embodiment of the present invention, the present invention is not limited to the above-described embodiment, the technical field to which the present invention belongs without departing from the spirit of the invention claimed in the claims Anyone of ordinary skill in the art of various modifications can be made, as well as such changes are within the scope of the claims.

도 1 및 도 2는 본 발명에 따른 자동차용 서브프레임 마운트 중, 각각 솔리드 타입 및 부쉬 타입을 나타내는 도면,1 and 2 are views showing a solid type and a bushing type, respectively, of a vehicle subframe mount according to the present invention;

도 3은 일반적인 주파수에 대한 투과음을 나타내는 그래프이다. 3 is a graph showing transmission sound with respect to a general frequency.

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

11 : 고무 부쉬 12 : 스프링11: rubber bush 12: spring

13 : 챔버 20 : 제어부13 chamber 20 control unit

30 : 작동부 31 : 랙기어30: operating part 31: rack gear

32 : 피니언 기어32: pinion gear

Claims (3)

서브프레임(100) 내에 장착된 고무 부쉬(11)와, 상기 고무 부쉬(11)의 하단부에 이를 탄성 지지하는 스프링(12)과, 주파수에 대한 투과음의 변화에 따라 상기 고무 부쉬(11)를 강제적으로 상하 이동하도록 제어하는 제어부(20)와, 상기 제어부(20)의 제어신호에 따라 작동하는 작동부(30)를 포함하여 구성된 것을 특징으로 하는 자동차용 서브프레임 마운트.The rubber bush 11 mounted in the subframe 100, the spring 12 elastically supporting the lower end of the rubber bush 11, and the rubber bush 11 in accordance with the change of the transmission sound with respect to frequency Sub-frame mounting for a vehicle, characterized in that it comprises a control unit for controlling to move up and down forcibly, and an operating unit (30) operating in accordance with the control signal of the control unit (20). 제1항에 있어서,The method of claim 1, 상기 작동부(30)는 상기 서브프레임(100)과 고무 부쉬(11) 사이에 형성된 챔버(13)의 둘레면에 형성된 랙기어(31)와, 상기 랙기어에 치합되어 고무 부쉬(11) 전체를 상하 방향으로 이동시키는 동력을 발휘하는 피니언 기어(32)가 축고정된 구동모터인 것을 특징으로 하는 자동차용 서브프레임 마운트.The operation unit 30 is a rack gear 31 formed on the circumferential surface of the chamber 13 formed between the subframe 100 and the rubber bush 11, and the rubber bush 11 is joined to the rack gear as a whole The subframe mount for automobiles, characterized in that the pinion gear 32 that exerts the power to move in the up and down direction is a axially fixed drive motor. 제2항에 있어서,The method of claim 2, 상기 챔버(13)는 그 내부에 피니언 기어(32)의 회전이 원활히 실시될 수 있도록 오일이 밀봉된 것을 특징으로 하는 자동차용 서브프레임 마운트.The chamber (13) is an automobile subframe mount, characterized in that the oil is sealed so that the rotation of the pinion gear (32) can be carried out smoothly therein.
KR1020070130302A 2007-12-13 2007-12-13 Mount of subframe for automobile KR20090062848A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190083852A (en) * 2018-01-05 2019-07-15 현대자동차주식회사 Device for controlling the properties of subframe bush

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190083852A (en) * 2018-01-05 2019-07-15 현대자동차주식회사 Device for controlling the properties of subframe bush

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