JP2011214647A5

JP2011214647A5 -

Info

Publication number: JP2011214647A5
Application number: JP2010082564A
Authority: JP
Filing date: 2010-03-31
Publication date: 2013-04-25
Anticipated expiration: 2030-03-31

Description

本発明は、駐車ブレーキ機構を備えたディスクブレーキに関するものである。 The present invention relates to de Isukubureki provided with a parking brake mechanism.

従来、自動車等の車両に搭載されるディスクブレーキにおいては、例えば特許文献１に記載されているように、駐車ブレーキ機構を備えたものが知られている。特許文献１に記載されたディスクブレーキは、常用ブレーキとして使用する場合には、液圧によってシリンダ内のピストンを推進して、ブレーキパッドをディスクロータに押圧することによって制動力を発生させる。また、駐車ブレーキとして使用する場合には、電動モータによって、減速機構を介して、ボール−ランプ機構（回転−直動変換機構）の回転部材を回転させて直動部材を直動させ、ピストンを前進させることにより、ブレーキパッドをディスクロータに押圧して制動力を発生させる。 Traditionally, in Lud Isukubureki I mounted on a vehicle such as an automobile, for example, as described in Patent Document 1, one with a parking brake mechanism are known. When used as a service brake, the disk brake described in Patent Document 1 generates a braking force by propelling a piston in a cylinder by hydraulic pressure and pressing a brake pad against the disk rotor. Also, when used as a parking brake, an electric motor rotates a rotating member of a ball-ramp mechanism (rotation-linear motion conversion mechanism) via a speed reduction mechanism to linearly move the linear motion member, By moving forward, the brake pad is pressed against the disc rotor to generate a braking force.

そこで、本発明は、駐車ブレーキの作動を迅速に解除することができる駐車ブレーキを備えたディスクブレーキを提供することを目的とする。 The present invention has an object to provide a de-Isukubureki having a parking brake which can be released quickly actuation of the parking brake.

上記の課題を解決するために、本発明は、ディスクロータを挟んで両側に配置される一対のブレーキパッドと、キャリパのシリンダ内に設けられて前記ブレーキパッドを前記ディスクロータに押圧するピストンと、前記シリンダ内に設けられ電動駆動機構の回転を回転−直動変換機構によって直線運動に変換して前記ピストンを前記ブレーキパッドが前記ディスクロータを押圧する駐車制動位置へ前進させて保持可能な駐車ブレーキ機構とを備えたディスクブレーキであって、
前記回転−直動変換機構は、一対のランプ部材と、該一対のランプ部材間に介装される転動体とを有し、前記一対のランプ部材の少なくとも一方は、前記電動駆動機構により回転する回転部材となっており、前記一対のランプ部材の相対回転によって前記転動体が転動する傾斜溝が形成され、
該傾斜溝は、前記回転部材の回転方向に沿って連続的に複数配置され、前記各傾斜溝の一端部には前記転動体が配置されたとき前記ピストンを後退させる非制動部が形成され、他端部には前記転動体が配置されたとき前記ピストンを駐車制動位置へ前進させる駐車制動部が形成されており、
前記一対のランプ部材を一の傾斜溝において前記転動体が前記非制動部から前記駐車制動部へ転動する方向に回転させることにより、一の傾斜溝の前記駐車制動部にある前記転動体が隣接する他の傾斜溝の非制動位置に転動可能であることを特徴とする。 In order to solve the above problems, the present invention includes a pair of brake pads disposed on both sides of a disk rotor, a piston that is provided in a caliper cylinder and presses the brake pad against the disk rotor, A parking brake which is provided in the cylinder and can convert the rotation of the electric drive mechanism into a linear motion by a rotation-linear motion conversion mechanism and advance the piston to a parking brake position where the brake pad presses the disk rotor and can hold the piston. A disc brake equipped with a mechanism,
Said rotation - linear motion converting mechanism is rotated, a pair of ramp members, and a rolling element interposed between the pair of ramp member, at least hand of the pair of ramp members, by the electric drive mechanism An inclined groove is formed in which the rolling element rolls by relative rotation of the pair of ramp members,
A plurality of the inclined grooves are continuously arranged along the rotation direction of the rotating member, and a non-braking part for retreating the piston when the rolling element is arranged is formed at one end of each inclined groove, The other end portion is formed with a parking braking portion that moves the piston forward to a parking braking position when the rolling element is disposed,
By rotating the pair of ramp members in one inclined groove in a direction in which the rolling element rolls from the non-braking part to the parking brake part, the rolling element in the parking brake part of one inclined groove is It is possible to roll to a non-braking position of another adjacent inclined groove.

Claims

A pair of brake pads arranged on both sides of the disk rotor, a piston provided in a caliper cylinder for pressing the brake pad against the disk rotor, and rotation of an electric drive mechanism provided in the cylinder A disc brake comprising: a parking brake mechanism capable of converting the linear motion into a linear motion by a linear motion conversion mechanism and holding the piston forward to a parking braking position where the brake pad presses the disc rotor;
Said rotation - linear motion converting mechanism is rotated, a pair of ramp members, and a rolling element interposed between the pair of ramp member, at least hand of the pair of ramp members, by the electric drive mechanism An inclined groove is formed in which the rolling element rolls by relative rotation of the pair of ramp members,
A plurality of the inclined grooves are continuously arranged along the rotation direction of the rotating member, and a non-braking part for retreating the piston when the rolling element is arranged is formed at one end of each inclined groove, The other end portion is formed with a parking braking portion that moves the piston forward to a parking braking position when the rolling element is disposed,
By rotating the pair of ramp members in one inclined groove in a direction in which the rolling element rolls from the non-braking part to the parking brake part, the rolling element in the parking brake part of one inclined groove is A disc brake capable of rolling to a non-braking position of another adjacent inclined groove.

The electric drive mechanism is provided with an electric motor,
2. The disc brake according to claim 1, wherein the control unit that controls the electric motor detects the movement of the rolling element to the parking brake unit based on a change in a current supplied to the electric motor.

The electric drive mechanism is provided with an electric motor,
The control unit that controls the electric motor is connected to a rotational position sensor that detects the rotational position of the rotating member,
The disc brake according to claim 1, wherein the control unit detects movement of the rolling element to the parking brake unit by the rotational position sensor.