KR20100023665A - Electromechanical brake for vehicle - Google Patents

Electromechanical brake for vehicle Download PDF

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Publication number
KR20100023665A
KR20100023665A KR1020080082550A KR20080082550A KR20100023665A KR 20100023665 A KR20100023665 A KR 20100023665A KR 1020080082550 A KR1020080082550 A KR 1020080082550A KR 20080082550 A KR20080082550 A KR 20080082550A KR 20100023665 A KR20100023665 A KR 20100023665A
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KR
South Korea
Prior art keywords
worm wheel
worm gear
shaft
worm
vehicle
Prior art date
Application number
KR1020080082550A
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Korean (ko)
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KR101294662B1 (en
Inventor
김종기
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주식회사 만도
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Priority to KR1020080082550A priority Critical patent/KR101294662B1/en
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    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
    • F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
    • F16D55/226—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
    • F16D55/2265—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing
    • F16D55/227—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing by two or more pins
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D2066/006—Arrangements for monitoring working conditions, e.g. wear, temperature without direct measurement of the quantity monitored, e.g. wear or temperature calculated form force and duration of braking
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/24—Electric or magnetic using motors
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
    • F16D2125/40—Screw-and-nut
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/44—Mechanical mechanisms transmitting rotation
    • F16D2125/46—Rotating members in mutual engagement
    • F16D2125/52—Rotating members in mutual engagement with non-parallel stationary axes, e.g. worm or bevel gears

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

PURPOSE: An electromechanical brake for a vehicle is provided to generate braking power with low power due to high deceleration ratio by having double worm gear structure. CONSTITUTION: An electromechanical brake for a vehicle comprises a drive motor(120), a drive unit, and an inner pad(110a). A first worm gear(121) is formed on a rotary shaft of a drive motor. The drive unit comprises a first worm wheel(122), a shaft(123), a second worm gear, a second worm wheel(125), and a lead screw(126). The first worm wheel is engaged with the first worm gear. The shaft is connected to the first worm wheel. The second worm gear is formed in the shaft. The second worm wheel is engaged with the second worm gear. The lead screw is connected to the second worm wheel. A connection part(110c) is formed on the rear side of the inner pad.

Description

차량용 전자제동장치{Electromechanical Brake for Vehicle}Electronic Braking System for Vehicles {Electromechanical Brake for Vehicle}

본 발명은 차량용 전자제동장치에 관한 것으로, 특히 이중 웜기어 구조를 채택하여 충분한 제동력을 발휘할 뿐만 아니라 패드의 마모에 따라 패드와 디스크의 간격을 자동으로 조절할 수 있는 차량용 전자제동장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic braking apparatus for a vehicle, and more particularly, to an electronic braking apparatus for a vehicle that can adopt a double worm gear structure to exhibit sufficient braking force and automatically adjust a gap between a pad and a disk according to wear of the pad.

일반적으로, 유압을 사용하지 아니하고 전기모터에 의해 구동되어 디스크(3)의 회전방향측으로 이동하며 마찰패드(4a,4b)를 디스크(3)에 압박하는 쐐기부재(5)를 갖춘 차량용 전자제동장치는 쐐기부재(5)가 디스크(3) 회전방향으로 끌려 들어감으로써 발생하는 자기작동효과(Self-energizingeffect)에 의해 적은 힘만으로도 충분한 제동력을 형성시켜준다.In general, an electronic braking device for a vehicle having a wedge member 5 which is driven by an electric motor without moving hydraulic pressure and moves toward the rotational direction of the disk 3 and presses the friction pads 4a and 4b to the disk 3. By the self-energizing effect generated by the wedge member 5 is drawn in the disk 3 rotational direction to form a sufficient braking force with a small force.

이러한 쐐기부재(5)를 갖춘 차량용 전자제동장치는 도 1에 도시된 바와 같이 슬라이딩 가능한 캘리퍼하우징(1)과, 차량의 너클부(미도시)에 고정 설치되어 캘리퍼하우징(1)의 슬라이딩을 안내하는 캐리어(2)와, 차량의 휠(미도시)과 함께 회전하는 디스크(3)와 접촉하여 마찰력을 발생시키는 마찰패드(4a,4b)와, 전면에 마찰패드(4a,4b)가 체결되며 배면에 디스크(3)의 회전 방향에 대하여 소정의 경사각을 갖는 쐐기형상의 돌출부가 좌우 대칭적으로 마련된 쐐기부재(5)와, 쐐기부재(5)의 쐐기형상에 대응하는 경사면이 마련되어 쐐기부재(5)의 디스크(3) 회전 방향 운동을 안내 및 지지하는 지지부가 마련된 지지부재(6)와, 쐐기부재(5)와 지지부재(6) 사이에 배치되어 마찰패드(4a,4b)를 디스크(3)와 접촉시키도록 쐐기부재(5)를 미는 가동부재(7)와, 가동부재(7)와 연결되어 가동부재(7)의 진퇴운동을 조절하는 구동모터(8)를 포함하여 구성된다.The electronic brake system for a vehicle having the wedge member 5 is fixed to a caliper housing 1 that is slidable as shown in FIG. 1 and a knuckle portion (not shown) of the vehicle to guide sliding of the caliper housing 1. And friction pads 4a and 4b which generate frictional force by contacting the carrier 2, the disk 3 which rotates together with the wheel of the vehicle (not shown), and the friction pads 4a and 4b on the front surface thereof. A wedge member 5 having a wedge-shaped protrusion having a predetermined inclination angle with respect to the rotational direction of the disc 3 on the rear surface is provided symmetrically, and an inclined surface corresponding to the wedge shape of the wedge member 5 is provided. 5, the support member 6 is provided between the support member 6 for guiding and supporting the rotational motion of the disk 3, and the friction pads 4a and 4b are disposed between the wedge member 5 and the support member 6, respectively. 3) the movable member 7 which pushes the wedge member 5 in contact with the movable member 7 and the movable member 7 It is is configured by a drive motor (8) for controlling the forward and backward movement of the movable member (7).

운전자가 브레이크 페달(미도시)을 밟으면 이를 감지하여 전자제어유닛(ECU;Electronic Control Unit, 미도시)에 의해 구동모터(8)를 작동시켜 가동부재(7)를 전진시킴으로써 마찰패드(4a,4b)와 디스크(3)가 서로 접촉하여 발생하는 마찰력에 의해 차량을 감속시키거나 정지시키고, 운전자가 브레이크 페달을 해제시키면 구동모터(8)가 역회전하여 가동부재(7)를 초기위치로 복귀시키고 마찰패드(4a,4b)는 디스크(3)와의 충격에 의해 뒤로 밀리게 된다.When the driver presses a brake pedal (not shown), the driver senses this and operates the drive motor 8 by an electronic control unit (ECU) (not shown) to move the movable member 7 to the friction pads 4a and 4b. ) And the disc 3 decelerate or stop the vehicle by the frictional force generated, and when the driver releases the brake pedal, the driving motor 8 reverses to return the movable member 7 to the initial position. The friction pads 4a and 4b are pushed back by the impact with the disk 3.

전술한 모터를 이용한 전자제동장치에 있어서, 자기작동효과를 발생시키는 쐐기타입은 적은 힘만으로도 충분한 제동력을 발휘하지만, 자동 간격 조절 및 패드 마모 보상 등의 문제점들을 가지고 있다.In the electronic braking apparatus using the above-described motor, the wedge type that generates the magnetic actuation effect exerts sufficient braking force with only a small force, but has problems such as automatic spacing and pad wear compensation.

이에 본 발명은 상기와 같은 문제점을 해결하기 위해 제안된 것으로, 본 발명은 쐐기 타입이 아닌 다이렉트 방식의 전자제동장치로서, 이중 웜기어 구조를 채택하여 높은 감속비에 의해 쐐기 타입과 마찬가지로 적은 힘만으로 충분한 제동력을 발휘할 뿐만 아니라, 쐐기 타입 전자제동장치의 문제점인 자동 간격 조절 및 패 드 마모 보상 문제를 해결할 수 있으며, 주차 기능도 제공하는 것이 목적이다.Therefore, the present invention has been proposed to solve the above problems, the present invention is a direct braking device of the non-wedge type, adopting a double worm gear structure by a high reduction ratio, such as wedge type sufficient braking force with only a small force In addition to solving the problem of the automatic spacing and pad wear compensation, which is a problem of the wedge-type electronic braking system, the objective is to provide a parking function.

상기와 같은 목적을 달성하기 위하여 본 발명은 슬라이딩 가능한 캘리퍼하우징과, 디스크와 접촉하는 인너패드 및 아웃터패드를 가지는 마찰패드와, 회전력을 발생시키는 구동모터와, 상기 구동모터에서 발생한 회전력을 감속시켜 상기 마찰패드를 진퇴시키는 구동유닛을 포함하는 차량용 전자제동장치에 있어서, 상기 구동모터의 회전축에는 제1웜기어가 형성되고, 상기 구동유닛은 상기 제1웜기어와 치합되는 제1웜휠과, 상기 제1웜휠과 연결된 샤프트와, 상기 샤프트에 형성된 제2웜기어와, 상기 제2웜기어와 치합되는 제2웜휠과, 상기 제2웜휠과 연결되어 상기 제2웜휠과 동일하게 회전하는 리드스크류를 포함하고, 상기 인너패드의 후면에는 상기 리드스크류가 결합하는 나사홀이 형성된 연결부가 마련되는 것을 특징으로 한다.In order to achieve the above object, the present invention provides a sliding caliper housing, a friction pad having an inner pad and an outer pad in contact with a disk, a drive motor for generating rotational force, and a reduction in rotational force generated from the drive motor. In an electronic brake system for a vehicle including a driving unit for advancing and reducing a friction pad, a first worm gear is formed on a rotation shaft of the driving motor, and the driving unit includes a first worm wheel engaged with the first worm gear, and the first worm wheel. And a second screw connected to the shaft, a second worm gear formed on the shaft, a second worm wheel engaged with the second worm gear, and a lead screw connected to the second worm wheel to rotate the same as the second worm wheel. The back of the pad is characterized in that the connection portion is formed with a screw hole to which the lead screw is coupled.

또한, 상기 구성에 있어서, 상기 제1웜휠은 상기 샤프트의 중앙에 위치하고, 상기 샤프트의 양단부에는 상기 제2웜기어가 각각 형성되며, 상기 각각의 제2웜기어에 대응하는 상기 제2웜휠, 상기 리드스크류, 상기 연결부가 각각 마련되는 것을 특징으로 한다.In the above configuration, the first worm wheel is located in the center of the shaft, the second worm gear is formed on both ends of the shaft, respectively, the second worm wheel corresponding to each of the second worm gear, the lead screw The connection parts are each provided.

또한, 상기 구성에 있어서, 브레이크 페달에 장착된 브레이크 작동스위치와, 차량의 휠의 회전속도를 감지하는 센서와, 상기 브레이크 작동스위치와 상기 센서를 통해 상기 마찰패드의 마모를 계산하는 전자제어유닛을 더 포함하며, 제동력 해제 시 상기 전자제어유닛은 계산된 값에 따라 상기 구동모터의 역회전수를 조절하는 것을 특징으로 한다.In the above configuration, the brake control switch mounted on the brake pedal, a sensor for detecting the rotational speed of the wheel of the vehicle, the brake control switch and the electronic control unit for calculating the wear of the friction pad through the sensor The electronic control unit may further include adjusting the reverse rotation speed of the driving motor according to the calculated value when the braking force is released.

이상에서 살펴본 바와 같이, 본 발명에 의한 차량용 전자제동장치는 충분한 제동력을 발휘하고, 패드의 마모에 따라 패드와 디스크의 간격을 자동으로 조절함으로써 신속한 제동이 이루어진다.As described above, the vehicular electronic braking apparatus according to the present invention exhibits sufficient braking force and performs rapid braking by automatically adjusting the gap between the pad and the disk according to the wear of the pad.

또한, 본 발명에 의한 차량용 전자제동장치는 차량을 주차하고자 하는 경우에도 이중 웜기어 구조에 의해 차량을 안전하게 주차시킬 수 있는 효과가 있다.In addition, the electronic brake system for a vehicle according to the present invention has an effect of safely parking a vehicle by a double worm gear structure even when a vehicle is to be parked.

이하에서는 상기와 같은 본 발명의 차량용 전자제동장치의 기술적 사상에 따른 바람직한 일 실시예를 첨부도면을 참조하여 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings a preferred embodiment according to the technical spirit of the electronic brake system for a vehicle of the present invention as described above is as follows.

본 발명의 일 실시예에 따른 차량용 전자제동장치는 도 2 내지 도 4에 도시되어 있는 바와 같이 차량의 휠(미도시)과 함께 회전하는 원판형상의 디스크(107) 양측면에 인너패드(110a)와 아웃터패드(110b)를 각각 접촉시켜 발생하는 마찰력을 이용하여 제동을 하는 장치로서, 내부 양측에 인너패드(110a)와 아웃터패드(110b)가 서로 대향되게 배치되어 있는 캘리퍼하우징(100)과, 차량의 너클부(미도시)에 고정되어 캘리퍼하우징(100)의 슬라이딩을 안내하는 캐리어(101)를 포함한다.As shown in FIGS. 2 to 4, the electronic brake system for a vehicle according to an exemplary embodiment of the present invention has inner pads 110a on both sides of a disk-shaped disk 107 rotating together with a wheel (not shown) of the vehicle. A device for braking using the friction force generated by contacting each of the outer pads (110b), the inner pad 110a and the outer pads (110b) are disposed on both sides of the inner facing the caliper housing (100) and the vehicle The carrier 101 is fixed to the knuckle portion (not shown) of the caliper housing 100 to guide the sliding.

캘리퍼하우징(100)이 캐리어(101)에 진퇴이동 가능하게 설치될 수 있도록 하기 위하여 캘리퍼하우징(100)의 양측단에는 한 쌍의 가이드로드(103)가 스크류 등의 체결부재를 통해 고정되어 있으며, 캐리어(101)의 양측에는 가이드로드(103)가 진퇴이동 가능하도록 가이드홀(102)이 각각 마련되어 있다. In order to allow the caliper housing 100 to be installed on the carrier 101 so as to be moved forward and backward, a pair of guide rods 103 are fixed to both sides of the caliper housing 100 through fastening members such as screws. Guide holes 102 are provided at both sides of the carrier 101 so that the guide rod 103 can move forward and backward.

캘리퍼하우징(100)의 후방에는 구동모터(120)를 수용하는 수용부(104)가 마 련되어 캘리퍼하우징(100)의 하면에 볼트(미도시)로 결합된다. 그리고, 수용부(104)의 하측과 볼트로 결합하여 구동모터(120)의 하부를 지지하는 제1지지부재(105)가 마련되며, 수용부(104)의 전방에는 후술할 제2웜휠(125)을 지지하기 위해 캘리퍼하우징(100)의 하면으로부터 하방으로 돌출되어 형성된 제2지지부재(106)가 마련된다.A rear portion of the caliper housing 100 is provided with an accommodating portion 104 for accommodating the driving motor 120 and coupled to a lower surface of the caliper housing 100 with bolts (not shown). Then, the first support member 105 is coupled to the lower side of the receiving portion 104 by a bolt to support the lower portion of the driving motor 120, and the second worm wheel 125 to be described later in front of the receiving portion 104. The second support member 106 is provided to protrude downward from the lower surface of the caliper housing 100 to support).

제1지지부재(105)의 전방에는 제1베어링(105b)이 삽입되는 제1설치홈(105a)이 형성된 설치부(105c)가 지지부재의 상측으로 돌출되어 양측에 각각 형성된다. 또한, 제2지지부재(106)의 하측에는 제2베어링(106b)이 삽입되는 제2설치홈(106a)이 양측에 각각 형성된다. 제1베어링(105b)에는 샤프트(123)의 양단이 각각 결합하고, 제2베어링(106b)에는 2개의 제2웜휠(125)의 회전축이 각각 결합하게 되는데, 이러한 구성에 대해서는 후술할 내용에서 상세히 설명하기로 한다.In front of the first support member 105, an installation portion 105c having a first installation groove 105a into which the first bearing 105b is inserted is protruded to the upper side of the support member and is formed on both sides thereof. In addition, under the second support member 106, second installation grooves 106a into which the second bearings 106b are inserted are formed at both sides, respectively. Both ends of the shaft 123 are coupled to the first bearing 105b, and the rotation shafts of the two second worm wheels 125 are respectively coupled to the second bearing 106b, which will be described in detail later. Let's explain.

구동모터(120)의 회전축에는 제1웜기어(121)가 형성되어 있고, 제1웜기어(121)의 하측에는 제1웜기어(121)와 치합되는 제1웜휠(122)이 배치된다. 제1웜휠(122)은 샤프트(123)와 연결되어 있고, 제1웜휠(122)은 샤프트(123)의 중앙에 위치한다. 샤프트(123)의 양단은 제1베어링(105b)과 결합하므로, 샤프트(123)의 위치는 고정되면서 샤프트(123)는 제1웜휠(122)과 동일한 방향으로 회전하게 된다.A first worm gear 121 is formed on the rotation shaft of the drive motor 120, and a first worm wheel 122 engaged with the first worm gear 121 is disposed below the first worm gear 121. The first worm wheel 122 is connected to the shaft 123, and the first worm wheel 122 is located at the center of the shaft 123. Since both ends of the shaft 123 are coupled to the first bearing 105b, the shaft 123 is rotated in the same direction as the first worm wheel 122 while the position of the shaft 123 is fixed.

샤프트(123)의 중앙에 위치한 제1웜휠(122)을 기준으로 샤프트(123)의 양측에는 제2웜기어(124)가 샤프트(123)와 일체로 형성되어 있다. 제2웜기어(124)는 제1웜휠(122)로부터 각각 동일한 거리만큼 이격되어 샤프트(123)의 양측에 형성되는 것이 바람직하다. 그리고, 제2웜기어(124)는 샤프트(123)의 일측에 하나만 형성하 는 구성도 가능하지만, 샤프트(123)의 양측에 각각 형성하여 인너패드(110a)의 양측을 균일하게 가압하는 것이 바람직하다.The second worm gear 124 is integrally formed with the shaft 123 on both sides of the shaft 123 with respect to the first worm wheel 122 positioned in the center of the shaft 123. The second worm gear 124 is preferably formed on both sides of the shaft 123 spaced apart from each other by the same distance from the first worm wheel 122. In addition, the second worm gear 124 may be configured to form only one on one side of the shaft 123, but preferably formed on both sides of the shaft 123 to uniformly press both sides of the inner pad 110a. .

각각의 제2웜기어(124)의 상측에는 제2웜기어(124)와 치합되는 제2웜휠(125)이 배치된다. 제2웜휠(125)의 전방과 후방에는 회전축이 형성되는데, 후방의 회전축은 제2베어링(106b)과 결합하여 제2웜휠(125)의 위치가 고정된다. 그리고, 전방의 회전축에는 리드스크류(126)가 형성되어 있다.A second worm wheel 125 engaged with the second worm gear 124 is disposed above each second worm gear 124. Rotating shafts are formed at the front and the rear of the second worm wheel 125, and the rear rotation shaft is coupled to the second bearing 106b to fix the position of the second worm wheel 125. And the lead screw 126 is formed in the front rotating shaft.

그리고, 인너패드(110a)의 후면에는 리드스크류(126)에 대응하는 나사홀이 형성된 연결부(110c)가 양측에 각각 마련되고, 리드스크류(126)는 연결부(110c)에 결합한다. 따라서, 인너패드(110a)는 리드스크류(126)의 회전방향에 따라 진퇴하게 되므로, 인너패드(110a)가 디스크(107)를 가압하여 마찰력에 의해 제동력이 발생하거나 인너패드(110a)가 디스크(107)와 이격되어 제동력을 해제할 수 있게 된다.In addition, the rear surface of the inner pad 110a is provided with connecting portions 110c having screw holes corresponding to the lead screws 126 on both sides thereof, and the lead screws 126 are coupled to the connecting portions 110c. Therefore, since the inner pad 110a moves forward and backward according to the rotation direction of the lead screw 126, the inner pad 110a presses the disk 107 to generate a braking force by the frictional force, or the inner pad 110a is the disk ( 107) to release the braking force.

일반적으로 웜기어는 2축이 서로 직교하여 회전방향이 달라지는 특징이 있으나, 본 발명의 일 실시예에서는 상술한 바와 같이 이중 웜기어 구조를 사용함으써 구동모터(120)의 회전방향과 리드스크류(126)의 회전방향이 동일하게 되고, 이중 웜기어의 높은 감속비에 의해 적은 힘만으로 충분한 제동력을 발휘할 수 있다. 그리고, 플로팅 타입 캘리퍼의 특성에 의해 인너패드(110a)와 디스크(107) 사이의 반력에 의해 아웃터패드(110b) 또한 디스크(107)와 접촉하여 제동력을 발생하게 된다.In general, the worm gear is characterized in that the two axes are orthogonal to each other, the rotation direction is different, in the embodiment of the present invention by using a double worm gear structure as described above, the rotation direction and the lead screw 126 of the drive motor 120 The direction of rotation is the same, and due to the high reduction ratio of the double worm gear, sufficient braking force can be exerted with only a small force. The outer pad 110b also contacts the disk 107 by the reaction force between the inner pad 110a and the disk 107 due to the characteristics of the floating type caliper to generate a braking force.

이하에서, 본 발명에 따른 차량용 디스크(107) 브레이크의 동작에 대하여 설명하기로 한다.Hereinafter, the operation of the vehicle disk 107 brake according to the present invention will be described.

운전자가 브레이크 페달(미도시)을 밟으면 브레이크 작동 스위치(미도시)를 통하여 전자제어유닛(미도시)이 이를 인식하고, 구동모터(120)에 전원을 인가하게 되면 제1구동모터(120)가 회전하게 된다. 통상적으로 모터에 전원이 인가되면 모터는 고속으로 회전하기 때문에 이를 감속시키기 위한 수단이 필요하다. 본 발명의 일 실시예에서는 이중 웜기어 구조가 모터의 회전을 감속하는 감속수단의 기능을 수행한다.When the driver presses the brake pedal (not shown), the electronic control unit (not shown) recognizes this through the brake operation switch (not shown), and when the power is applied to the driving motor 120, the first driving motor 120 is applied. Will rotate. Typically, when power is applied to the motor, the motor rotates at a high speed, so a means for reducing the speed is required. In one embodiment of the present invention, the double worm gear structure functions as a deceleration means for slowing down the rotation of the motor.

이중 웜기어 구조에 의해 구동모터(120)의 회전속도를 감속시켜 리드스크류(126)가 회전하면, 리드스크류(126)는 위치가 고정된 상태에서 인너패드(110a)와 나사결합되어 있으므로, 인너패드(110a)가 전진하여 디스크(107)를 가압하게 된다. 이러한 가압력에 의한 반력이 작용하여 캘리퍼하우징(100)이 캐리어(101)의 가이드홀(102)을 따라 후퇴하게 되어 캘리퍼하우징(100)의 핑거부(130)가 아웃터패드(110b)를 디스크(107) 쪽으로 끌어당겨 마찰패드(110)와 디스크(107)가 서로 마찰을 함으로써 제동이 이루어지고, 운전자가 브레이크 페달을 해제시키면 구동모터(120)가 역회전하여 리드스크류(126)와 결합된 인너패드(110a)가 후진하여 제동력이 해제된다.When the lead screw 126 rotates by decelerating the rotational speed of the drive motor 120 by the double worm gear structure, the lead screw 126 is screwed with the inner pad 110a in a fixed position. 110a advances and presses the disk 107. The reaction force by the pressing force acts so that the caliper housing 100 is retracted along the guide hole 102 of the carrier 101 so that the finger 130 of the caliper housing 100 moves the outer pad 110b to the disc 107. The friction pad 110 and the disk 107 are pulled toward each other so that braking is achieved. When the driver releases the brake pedal, the driving motor 120 rotates in reverse to engage the inner pad coupled with the lead screw 126. 110a reverses and the braking force is released.

운전자가 브레이크 페달를 작동시킨 순간부터 차량의 제동이 시작될 때까지의 소요시간은 브레이크 페달에 장착되어 있는 브레이크 작동 스위치와 차량의 휠의 회전속도를 감지하는 센서(Wheel Speed Sensor)를 통하여 전자제어유닛에 의해 계산된다. 소요시간이 초기 설정시간보다 길다고 판단되면, 전자제어유닛은 제동력 해제 시 계산된 값에 따라 구동모터(120)의 역회전수를 조절하여 인너패드(110a)의 후진을 제어한다. 따라서, 마모에 따른 마찰패드(110)와 디스크(107)의 간격을 보상할 수 있다.The time required from the moment the driver operates the brake pedal to the start of the braking of the vehicle is transferred to the electronic control unit through the brake operation switch mounted on the brake pedal and the wheel speed sensor that detects the rotational speed of the wheel of the vehicle. Is calculated by If it is determined that the required time is longer than the initial set time, the electronic control unit controls the reverse of the inner pad 110a by adjusting the reverse speed of the driving motor 120 according to the value calculated when the braking force is released. Therefore, the gap between the friction pad 110 and the disk 107 due to wear can be compensated for.

또한, 차량을 주차시키고자 하는 경우에 있어서도 차량의 실내 운전석 쪽에 구비되어 있는 별도의 주차전용버튼(미도시)을 누르게 되면, 이를 감지한 전자제어유닛이 구동모터(120)를 구동시킴으로써, 인너패드(110a)가 전진하여 마찰패드(110)와 디스크(107)가 접하게 되어 디스크(107)의 회전이 구속되므로, 차량을 안전하게 주차시킬 수 있다.In addition, even when the vehicle is to be parked, when an additional parking dedicated button (not shown) provided in the driver's interior driver's seat is pressed, the electronic control unit that senses the driving motor 120 drives the inner pad, thereby Since the friction pad 110 and the disk 107 come into contact with each other and the rotation of the disk 107 is constrained, the vehicle 110 can be safely parked.

이상에서는 본 발명을 특정의 바람직한 실시예에 대하여 도시하고 설명하였다. 그러나, 본 발명은 상기한 실시예에만 한정되지 않으며, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 이하의 청구범위에 기재된 본 발명의 기술적 사상의 요지를 벗어남이 없이 얼마든지 다양하게 변경실시할 수 있을 것이다.In the above, the present invention has been illustrated and described with respect to certain preferred embodiments. However, the present invention is not limited only to the above-described embodiments, and those skilled in the art to which the present invention pertains can variously change without departing from the gist of the technical idea of the present invention described in the claims below. Could be done.

도 1은 종래의 차량용 전자제동장치에 관한 개략적인 구조를 나타낸 단면도이다.1 is a cross-sectional view showing a schematic structure of a conventional electronic brake system for a vehicle.

도 2는 본 발명의 일실시예에 따른 차량용 전자제동장치의 구조를 나타낸 사시도이다.2 is a perspective view showing the structure of an electronic brake system for a vehicle according to an embodiment of the present invention.

도 3은 본 발명의 일실시예에 따른 차량용 전자제동장치에서 제동력이 해제된 상태를 나타낸 단면도이다.Figure 3 is a cross-sectional view showing a state in which the braking force is released in the electronic brake system for a vehicle according to an embodiment of the present invention.

도 4는 본 발명의 일실시예에 따른 차량용 전자제동장치에서 제동력이 형성된 상태를 나타낸 단면도이다.Figure 4 is a cross-sectional view showing a state in which a braking force is formed in the electronic brake system for a vehicle according to an embodiment of the present invention.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

100: 캘리퍼하우징 101: 캐리어,100: caliper housing 101: carrier,

110: 마찰패드 120: 구동모터,110: friction pad 120: drive motor,

121: 제1웜기어 122: 제1웜휠,121: first worm gear 122: first worm wheel,

123: 샤프트 124: 제2웜기어,123: shaft 124: second worm gear,

125: 제2웜휠 126: 리드스크류125: second worm wheel 126: lead screw

Claims (3)

슬라이딩 가능한 캘리퍼하우징과, 디스크와 접촉하는 인너패드 및 아웃터패드를 가지는 마찰패드와, 회전력을 발생시키는 구동모터와, 상기 구동모터에서 발생한 회전력을 감속시켜 상기 마찰패드를 진퇴시키는 구동유닛을 포함하는 차량용 전자제동장치에 있어서,A vehicle comprising a slidable caliper housing, a friction pad having an inner pad and an outer pad in contact with the disc, a drive motor for generating rotational force, and a drive unit for decelerating the rotational force generated in the drive motor to advance and retract the friction pad. In the electronic braking device, 상기 구동모터의 회전축에는 제1웜기어가 형성되고,The first worm gear is formed on the rotating shaft of the drive motor, 상기 구동유닛은 상기 제1웜기어와 치합되는 제1웜휠과, 상기 제1웜휠과 연결된 샤프트와, 상기 샤프트에 형성된 제2웜기어와, 상기 제2웜기어와 치합되는 제2웜휠과, 상기 제2웜휠과 연결되어 상기 제2웜휠과 동일하게 회전하는 리드스크류를 포함하고,The drive unit includes a first worm wheel meshed with the first worm gear, a shaft connected to the first worm wheel, a second worm gear formed on the shaft, a second worm wheel meshed with the second worm gear, and the second worm wheel. Is connected to the lead screw to rotate the same as the second worm wheel, 상기 인너패드의 후면에는 상기 리드스크류가 결합하는 나사홀이 형성된 연결부가 마련되는 것을 특징으로 하는 차량용 전자제동장치.The rear side of the inner pad is provided with a connecting portion is formed with a screw hole for coupling the lead screw vehicle electronic braking device. 제 1항에 있어서,The method of claim 1, 상기 제1웜휠은 상기 샤프트의 중앙에 위치하고,The first worm wheel is located in the center of the shaft, 상기 샤프트의 양단부에는 상기 제2웜기어가 각각 형성되며,The second worm gear is formed on both ends of the shaft, 상기 각각의 제2웜기어에 대응하는 상기 제2웜휠, 상기 리드스크류, 상기 연결부가 각각 마련되는 것을 특징으로 하는 차량용 전자제동장치.And the second worm wheel, the lead screw, and the connection portion corresponding to each of the second worm gears, respectively. 제 1항에 있어서,The method of claim 1, 브레이크 페달에 장착된 브레이크 작동스위치와, 차량의 휠의 회전속도를 감지하는 센서와, 상기 브레이크 작동스위치와 상기 센서를 통해 상기 마찰패드의 마모를 계산하는 전자제어유닛을 더 포함하며,A brake operation switch mounted on the brake pedal, a sensor for sensing the rotational speed of the wheel of the vehicle, and the electronic control unit for calculating the wear of the friction pad through the brake operation switch and the sensor, 제동력 해제 시 상기 전자제어유닛은 계산된 값에 따라 상기 구동모터의 역회전수를 조절하는 것을 특징으로 하는 차량용 전자제동장치.When the braking force is released, the electronic control unit controls the reverse speed of the driving motor according to the calculated value.
KR1020080082550A 2008-08-22 2008-08-22 Electromechanical Brake for Vehicle KR101294662B1 (en)

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