JPH0430356U

JPH0430356U -

Info

Publication number: JPH0430356U
Application number: JP7217390U
Authority: JP
Priority date: 1990-07-06
Filing date: 1990-07-06
Publication date: 1992-03-11
Anticipated expiration: 2005-07-06
Also published as: JPH0753003Y2

Description

[Brief explanation of the drawing]

図面は本考案の一実施例を示すもので、第１図
は変速用負圧ブースタの縦断側面図、第２図は第
１図の−線断面図、第３図はポペツト弁の斜
視図、第４図は保持板の正面図、第５図及び第６
図は作動説明図である。Ｂ……負圧ブースタ、Ｓ……負圧源、Ｓ_１……
両当接段部間距離、Ｓ_２……両規制部間距離、Ｖ
_１，Ｖ_２……第１、第２制御弁、_１……ストロ
ーク、１……ブースタシエル、２……ブースタピ
ストン、３_１，３_２……第１、第２作動室、５_１，５_２……第１、第２弁筒、７_１，７_２……第１
、第２反力ピストン、８_１，８_２……肩部、９_１，９_２……ストツパ、１０_１，１０_２……軸受、
１１……入力部材、１２……変速レバー、１３_１，１３_２……第１、第２大気室、１４_１，１４_２……第１、第２反力室、１５_１，１５_２……大気
導入孔、１７_１，１７_２……第１、第２戻しばね
、２２_１，２２_２……第１、第２ポペツト弁、３
１_１，３１_２……第１、第２……フラツト弁、３
２……負圧導入路、３３……負圧室、３８……出
力部材、３９……シフトアーム。 The drawings show one embodiment of the present invention, in which Fig. 1 is a longitudinal sectional side view of a negative pressure booster for speed change, Fig. 2 is a sectional view taken along the line - - in Fig. 1, and Fig. 3 is a perspective view of a poppet valve. Figure 4 is a front view of the holding plate, Figures 5 and 6
The figure is an explanatory diagram of the operation. B... Negative pressure booster, S... Negative pressure source, S ₁ ...
Distance between both abutting step parts, S ₂ ... Distance between both regulating parts, V
₁ , V ₂ ...First and second control valves, ₁ ... Stroke, 1 ... Booster shell, 2 ... Booster piston, 3 ₁ , 3 ₂ ... First and second working chambers, 5 ₁ , 5 ₂ ... first and second valve cylinders, 7 ₁ , 7 ₂ ... first
, second reaction piston, 8 ₁ , 8 ₂ ... shoulder, 9 ₁ , 9 ₂ ... stopper, 10 ₁ , 10 ₂ ... bearing,
11...Input member, 12...Shift lever, 13 ₁ , 13 ₂ ... first and second atmospheric chambers, 14 ₁ , 14 ₂ ...First and second reaction force chambers, 15 ₁ , 15 ₂ ... Atmosphere inlet, 17 ₁ , 17 ₂ ... First and second return springs, 22 ₁ , 22 ₂ ... First and second poppets valve, 3
1 ₁ , 31 ₂ ... 1st, 2nd ... flat valve, 3
2... Negative pressure introduction path, 33... Negative pressure chamber, 38... Output member, 39... Shift arm.

Claims

[Claims for Utility Model Registration] Negative pressure source S; this booster shell 1; housed in this booster shell 1 so as to be able to reciprocate, and partitioning its interior into first and second working chambers 3 ₁ and 3 ₂ ; with the booster piston 2; this booster piston 2
first and second valve cylinders 5 ₁ , 5 ₂ protruding from both ends of the booster shell ₁ and penetrating both end _walls of the booster shell 1 ; The first and second valve cylinders 5 ₁ , 5 can move through a constant stroke defined by an inward movement limit on one side and an outward movement limit on the opposite side.
₂ into first and second reaction chambers 14 ₁ , 14 ₂ on the side of the booster piston 2 and first and second atmospheric chambers 13 ₁ , 13 ₂ on the opposite side, respectively. 7 ₁ , 7 ₂ ; first and second return springs 17 that bias these first and second reaction pistons 7 ₁ and 7 _2, respectively, toward the inward movement limit.
₁ , 17 ₂ ; first and second reaction pistons 7 ₁ ,
A pair of contact step portions 36 ₁ , 3 that slidably pass through 7 ₂ and can come into contact with the inner ends of each reaction piston.
6 ₂ and is connected to the gear shift lever 12.
1 and; arranged in the first and second valve cylinders 5 ₁ , 5 ₂ respectively, and when the reaction pistons 7 ₁ , 7 ₂ are located at the inward movement limit, the corresponding working chambers 3 ₁ ,
3 ₂ and the reaction force chambers 14 ₁ and 14 ₂ are disconnected from the negative pressure source S and communicated with each atmospheric chamber 13 ₁ and 13 ₂ ,
When each reaction force piston 7 ₁ , 7 ₂ is moved toward the outer movement limit by the contact step portion 36 ₁ , 36 ₂ of the input member 11 , each working chamber 3 ₁ , 3 ₂ and reaction force chamber 1
first and second control valves V ₁ and V ₂ which disconnect the air chambers 4 ₁ and 14 ₂ from the atmospheric chambers 13 ₁ and 13 ₂ and communicate with the negative pressure source S; an output member 38 for providing a shifting operation;
A pair of contact steps 36 ₁ , 36 ₂ of the input member 11 The distance S ₁ between the first and second reaction force pistons 14 ₁ , 14 In order to regulate the inward movement limit of ₂ , the first and second
A negative pressure booster for shifting, characterized in that the distance S ₂ is set larger than the distance S 2 between a pair of regulating portions 8 ₁ and 8 ₂ provided on valve cylinders 5 ₁ and 5 ₂ , respectively.