Brake boosting device

Patent metadata

Field	Value
Publication number	US-2017190323-A1
Application number	US-201515315012-A
Country	US
Kind code	A1
Filing date	Jul 14, 2015
Priority date	Jul 16, 2014
Publication date	Jul 6, 2017
Grant date	—

Abstract

A brake boosting device wherein a vibration control member is provided to an end part of a return coil spring that is arranged inside a vehicle chamber and that is interposed between a booster body and an input rod. The vibration control member has provided thereto: a seat part that suppresses the vibration of the return coil spring and that is between the end part of the return coil spring and a support part that supports the end part; and a guide part that is provided integrally with the seat part and that fits with the inner periphery of the end part of the return coil spring at a prescribed radial tightening allowance.

First claim

1 . A brake boosting device,
wherein a vibration control member is provided in an end part of a return coil spring interposed between a booster body and an input rod, the return coil spring being disposed in a vehicle interior, and the vibration control member is provided with a seat part interposed between the end part of the return coil spring and a support part supporting the end part, the seat part suppressing vibrations of the return coil spring, and a guide part disposed integrally with the seat part, the guide part being fitted to an inner periphery or an outer periphery of the end part of the return coil spring via a predetermined radial tightening allowance.

2 . The brake boosting device according to claim 1 ,
wherein the guide part includes a cylindrical base part and a plurality of arc-shaped projections provided at regular intervals in a circumferential direction on an outer periphery or an inner periphery of the base part, the plurality of arc-shaped projections being fitted to the inner periphery or the outer periphery of the end part of the return coil spring via a predetermined radial tightening allowance.

3 . The brake boosting device according to claim 1 ,
wherein a connection portion between the seat part and the guide part is provided with an annular recess part capable of housing the end part of the return coil spring.

4 . The brake boosting device according to any one of claim 1 ,
wherein the vibration control member is disposed integrally with an end part of a boot disposed between the booster body and the input rod, the end part being close to the booster body.

5 . The brake boosting device according to claim 4 ,
wherein a support part supporting the end part of the boot close to the booster body is cylindrical, in the guide part supported by the support part, three or more outer peripheral projections are provided at regular intervals in the circumferential direction on the outer periphery of the cylindrical base part, three or more inner peripheral projections are provided at regular intervals in the circumferential direction on the inner periphery of the cylindrical base part, and the outer peripheral projections and the inner peripheral projections are alternately disposed with a phase difference in the circumferential direction.

6 . The brake boosting device according to claim 1 ,
wherein a connection portion between the seat part and the guide part is provided with an annular recess part capable of housing the end part of the return coil spring.

7 . The brake boosting device according to claim 6 ,
wherein the vibration control member is disposed integrally with an end part of a boot disposed between the booster body and the input rod, the end part being close to the booster body.

8 . The brake boosting device according to claim 7 ,
wherein a support part supporting the end part of the boot close to the booster body is cylindrical, in the guide part supported by the support part, three or more outer peripheral projections are provided at regular intervals in the circumferential direction on the outer periphery of the cylindrical base part, three or more inner peripheral projections are provided at regular intervals in the circumferential direction on the inner periphery of the cylindrical base part, and the outer peripheral projections and the inner peripheral projections are alternately disposed with a phase difference in the circumferential direction.

9 . The brake boosting device according to claim 1 ,
wherein the vibration control member is disposed integrally with an end part of a boot disposed between the booster body and the input rod, the end part being close to the booster body.

10 . The brake boosting device according to claim 9 ,
wherein a support part supporting the end part of the boot close to the booster body is cylindrical, in the guide part supported by the support part, three or more outer peripheral projections are provided at regular intervals in the circumferential direction on the outer periphery of the cylindrical base part, three or more inner peripheral projections are provided at regular intervals in the circumferential direction on the inner periphery of the cylindrical base part, and the outer peripheral projections and the inner peripheral projections are alternately disposed with a phase difference in the circumferential direction.

Assignees

• Advics Co Ltd

Inventors

• Miwa Yuta
• Honda Tetsuya

Classifications

• F16F1/02

  made of steel or other material having low internal friction {(characterised by their special construction from fibre-reinforced plastics F16F1/366; spring units consisting of several springs F16F3/02; making springs from wire B21F35/00)}; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant · CPC title

• B60T17/00

  Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features (air compressors per se F04) · CPC title

• B60T7/04 Primary

  foot actuated · CPC title

• B60T7/06 Primary

  Disposition of pedal · CPC title

• F16J3/042

  Fastening details · CPC title