Akebono Brake Industry Co., Ltd.

Seiya Odaka

Hirokazu Yoshida

Shinji Aoyagi

Toshifumi Maehara

Hiroo Kobayashi

Yukio Iwata

Toshiyuki Negishi

Hiroshi Ikegami

Hisashi Mori

Hiroshi Hirashita

Fumio Takemori

Kazuhisa Kinoshita

Haruo Tsuzuku

Kazuyuki Shibayama

In a disc brake of the type in which the outer pad is directly supported by the pawls,and,of the caliper,in a manner that the protrusions,and,of the back plate,of the outer pad,are put in engagement with the engaging parts,and,of the pawls of the caliper,the protrusions,and,of the back plate,of the outer pad,and the engaging parts,and,of the pawls of the caliper are located on the radially inner side of the surface pressure center C of the outer pad

Disc brake

In the pushing anchor type disc brake device, reduction of noise and prevention of uneven wear can be accomplished especially in the brake device in which brake torque of the outer pad is transmitted via the caliper. In the disc brake device, the caliper is guided by a pair of guide pins composed of a main pin and a sub-pin. In order to transmit the brake torque of the outer pad via the caliper and the main pin, the back plate of the outer pad and the caliper are engaged with each other by engaging a protrusion with a recess, wherein the engagement is conducted at a plurality of portions in the circumferential direction of the rotor, so that the brake torque can be transmitted from the outer pad to the caliper. The main pin is arranged on the rotor run-out side, so that a pushing anchor structure can be formed. A pair of guide pins and guide holes of the support member which engage with the pair of guide pins stride the rotor and extend exceeding a facing section where the rotor faces the outer pad. The main pin is arranged on the rotor run-out side. Brake torque on the outer pad side is transmitted by the protrusion and recess engaging section arranged on the rotor run-out side.

Disc brake device

Disclosed is a drum brake device in which during a service brake application, a pair of brake shoes operates in a leading/trailing mode, and during a parking brake application, a parking brake mechanism operates to cause the brake shoes to operate in the duo servo mode. A first lever, an equalizer and a second lever, which make up the parking brake mechanism, are all assembled onto one of the brake shoes. The second lever includes an input portion, a lever contact portion and an equalizer contact portion. The input portion receives a force from a parking lever. The lever contact portion applies a turning force to the first lever. The equalizer contact portion applies a turning force to the equalizer. The second lever, when it is turned, turns the first lever and then the equalizer.

Drum brake device having leading/trailing mode and duo servo mode

A pad clip 40 includes a U-shaped portion 46 which can be engaged with a guide projection 16 provided in a support 14. On one side of the U-shaped portion 46, a first spring portion 74 is continuously connected to a second spring portion 64. The first spring portion 74 includes a curved portion 76 and a leading end contact portion 82, such that the leading end contact portion 82 energizes a friction pad 20 outwardly in the rotor radial direction. The second spring portion 64 is protruded and curved in the rotor peripheral direction to thereby provide a projection shape. The protrusion top portion 70 of the second spring portion 64 is in contact with the friction pad 20, and the spring upper end portion 66 and lower end portion 68 of the second spring portion 64 are respectively in contact with the support 14, thereby energizing the friction pad 20 in the rotor peripheral direction. Thus, if the friction pad 20 moves in a manner like arrow 84 to thereby push and collapse the second spring portion 64, then the contact portion 82 will move upwardly, which increases the energizing force to energize the friction pad 20 outwardly in the rotor radial direction.

Pad clip for a disc brake

A lining is attached on a front surface of a back plate and a protrusion for the engagement with a caliper is formed on a back surface of the back plate, and a recess is formed at a tip end of the protrusion and the cross-sectional view of the protrusion is H-shaped.

Friction pad for disc brake

A dust-proof boot comprising an internal engaging ring extended from one end of an expansible bellows portion and an external engaging ring provided upwardly thereof and capable of being spread is provided at an extended base of the internal engaging ring with an air flow port for guiding pressure from the inside of the bellows portion into the internal engaging ring. In mounting the dust-proof boot on a support provided with a guide hole, the internal engaging ring of the dust-proof boot is fitted into an internal groove of the support, after which compressed air is supplied from the interior of the bellows whereby the compressed air spreads the external engaging ring via the air flow port and the external engaging ring is fitted into an external groove.

Dust-proof boot and method for mounting the same

A disk brake of a floating caliper type having a disk rotating with a vehicle wheel, a caliper having a hydraulic cylinder mechanism, a support member secured to a stationary portion of a vehicle and a pair of friction pads mounted on the support member. The friction pads supported by the support member through wedge contact and resiliently urged by spring portions of pad clip members so that the friction pads are kept in surface contact with the support member at the time of non-braking. A sufficient area for transmitting the braking forces applied by the friction pads are stably maintained at the time of start of the braking, and the rotation moment on the pads are reduced and the braking forces are dispersedly transmitted to the disk run-in and run-out sides of the support member during the braking.

Disk brake

A disc brake of a guide pin type which comprises a boss member provided on one of a caliper of the disc brake and a support member fixed to a stationary portion of a vehicle, a guide pin slidably mounted in the boss member, the guide pin being fixed to the other one of the caliper and the support member, and a boot for damping and sealing the boss member. The boot is disposed between the boss member and the guide pin, the boot is formed of an elastic material, the boot is provided at one end thereof with a thickened portion and a seal portion. The thickened portion has an outer diameter substantially equal to an inner diameter of one end of the boss member, and the thickened portion being press-fitted in between the boss member and the guide pin. The seal portion is substantially tubular, the seal portion is formed integral with the boot, the seal portion is disposed radially outwardly of the thickened portion in surrounding relation to the thickened portion, and the seal portion is fitted on the outer surface of the boss member.

Growing community of inventors

Tokyo, Japan

Seiya Odaka