JP2013011301A5

JP2013011301A5 -

Info

Publication number: JP2013011301A5
Application number: JP2011144151A
Authority: JP
Filing date: 2011-06-29
Publication date: 2014-07-03
Anticipated expiration: 2031-06-29

Description

上記課題を解決するための手段として、本発明は、キャリパ本体内を移動して、ブレーキパッドをディスクロータに押圧するピストンを備えたディスクブレーキにおいて、前記キャリパ本体には、可撓性を有するピストンブーツが設けられ、前記ピストンブーツは、該ピストンブーツの一端部が、前記キャリパ本体のシリンダ部の内周面と前記ピストンの外周面との間にリング部材を介して固定されると共に、前記ピストンブーツの他端部が、前記ピストンブーツの一端部と前記ピストンの軸方向に離れて前記ピストンの外周面に係止されていることを特徴とするものである。 As a means for solving the above-mentioned problems, the present invention provides a disc brake having a piston that moves in the caliper body and presses the brake pad against the disc rotor. The caliper body has a flexible piston. boot is provided, the piston boot, one end of the piston boot is fixed through a ring member between an outer peripheral surface of the inner circumferential surface of the cylinder portion of the caliper body piston Rutotomoni, said piston the other end portion of the boot, in which apart in the axial direction of the one end portion of the piston boot piston, characterized that you have been locked to the outer circumferential surface of the piston.

ピストンブーツ２１は、図２に示すように、全体として筒状に形成され、その両端部には、断面略矩形の環状に形成され、ピストンブーツ２１の一端部となるシリンダ固定部２１Ａと、ピストンブーツ２１の他端部となるピストン固定部２１Ｂとが設けられている。これらシリンダ固定部２１Ａとピストン固定部２１Ｂとの間には、蛇腹状部２１Ｃが形成され、ピストンブーツ２１がピストン９の移動に伴って伸縮可能になっている。ピストンブーツ２１のシリンダ固定部２１Ａの内周面には内方に湾曲して環状で突設する突起部３１が形成される。この突起部３１により、ピストン９とシリンダ部５との間がシールされ、シリンダ部５内への水分や埃等の異物の侵入を防止している。また、ピストンブーツ２１のピストン固定部２１ＢのディスクロータＤ側となる面には、ディスクロータＤ側に環状に突起した係合突起３２が形成される。 As shown in FIG. 2, the piston boot 21 is formed in a cylindrical shape as a whole, and is formed in an annular shape having a substantially rectangular cross section at both ends thereof. A piston fixing portion 21 </ b> B serving as the other end portion of the boot 21 is provided. A bellows-like portion 21C is formed between the cylinder fixing portion 21A and the piston fixing portion 21B, and the piston boot 21 can be expanded and contracted as the piston 9 moves . On the inner peripheral surface of the cylinder fixing portion 21 </ b> A of the piston boot 21, a protruding portion 31 that is curved inward and protrudes in an annular shape is formed. The projection 31 seals between the piston 9 and the cylinder 5 to prevent foreign matter such as moisture and dust from entering the cylinder 5. Further, on the surface of the piston boot 21 that is on the disk rotor D side of the piston fixing portion 21B, an engagement protrusion 32 that protrudes in an annular shape on the disk rotor D side is formed.

Claims

In a disc brake having a piston that moves inside the caliper body and presses the brake pad against the disc rotor,
The caliper body is provided with a flexible piston boot,
Said piston boot, one end of the piston boot, the fixed via the ring member between an inner peripheral surface of the cylinder portion of the caliper body and the outer peripheral surface of the piston Rutotomoni, the other end of the piston boot but the disc brake, characterized in isosamples apart in the axial direction of the one end portion of the piston boot piston is locked to the outer circumferential surface of the piston.

The said ring member is fixed between the internal peripheral surface of the said cylinder part, and the outer peripheral surface of the said piston in the state which elastically deformed the one end part of the said piston boot in radial direction. Disc brake.

At one end of the piston boot, a protrusion is formed on the inner peripheral surface of the cylinder,
The protrusion contacts the outer peripheral surface of the piston,
The disc brake according to claim 1 or 2, wherein one end portion of the piston boot seals between the cylinder portion and the piston portion.

In the caliper body, and an electric motor, rotates to move the piston is converted into linear motion rotation from the electric motor - either claim 1 to 3, characterized in that a linear motion converting mechanism disc brake according to any.