To provide a negative pressure type brake booster which can suppress the positional displacement of a filter.SOLUTION: A negative pressure type brake booster comprises: a shell; an input shaft moving to an axial direction by receiving an input of a brake operation; an output shaft for generating an output which is obtained by moving to the axial line, and boosting the input; a valve body arranged so as to be progressive and retractable with respect to the shell in the axial direction; a sleeve held to the valve body, and having an internal space penetrated with the input shaft; a spring arranged in the internal space of the sleeve, and supported to a flange part arranged at an external peripheral part of the input shaft and an inner face of the sleeve at both ends; and a filter arranged in the internal space of the sleeve. The filter is positioned in the axial line by the flange part, and the spring has an extension part extending to the outside of a radial direction rather than a contour of the flange part at an end part at the flange part side.SELECTED DRAWING: Figure 2

    【課題】フィルタの位置ずれを抑制可能な負圧式ブレーキ倍力装置を提供する。【解決手段】シェルと、ブレーキ操作の入力を受けて軸方向に移動する入力軸と、軸方向に移動して入力を倍力した出力を発生する出力軸と、シェルに対して軸方向に進退自在に配設されたバルブボディと、バルブボディに保持され、入力軸が貫通する内部空間を有するスリーブと、スリーブの内部空間に配置され、入力軸の外周部に設けられた鍔部とスリーブの内面とに両端が支持されたスプリングと、スリーブの内部空間に配置されたフィルタとを備えた負圧式ブレーキ倍力装置において、フィルタは、鍔部により軸方向に位置決めされており、スプリングは、鍔部側の端部に、鍔部の外形よりも径方向外側に延びた延在部を有する。【選択図】図2


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    Title :

    NEGATIVE PRESSURE TYPE BRAKE BOOSTER


    Additional title:

    負圧式ブレーキ倍力装置


    Contributors:

    Publication date :

    2019-12-26


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF



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