JPH02462U

JPH02462U -

Info

Publication number: JPH02462U
Application number: JP7747888U
Authority: JP
Priority date: 1988-06-10
Filing date: 1988-06-10
Publication date: 1990-01-05

Description

[Brief explanation of drawings]

第１図は本考案が適用されたシフトシリンダの
一例をシフトレバー等とともに示す図であつて、
出力ロツドの中間位置を示す図である。第２図は
第１図のシフトシリンダの出力ロツドの突出し位
置を示す図であつて、第１図に対応する図である
。第３図は第１図のシフトシリンダの出力ロツド
の引込位置を示す図であつて、第１図に対応する
図である。第４図は本考案の他の例を示す図であ
つて、第１図に対応する図である。第５図および
第６図は従来のシフトシリンダをそれぞれ示す図
であつて、第１図に対応する図である。１０：シフトシリンダ、１２：シリンダ本体、
１４：シリンダボア、１８：内向フランジ（スト
ツパ）、２４：大径部、２６：小径部、２８：イ
ンナピストン、３２：第一アウタピストン、３４
：第二アウタピストン、３６：第一油圧室、３８
：第二油圧室、４４：出力ロツド、５４：シフト
レバー（シフト部材）。 FIG. 1 is a diagram showing an example of a shift cylinder to which the present invention is applied together with a shift lever etc.
FIG. 6 is a diagram showing an intermediate position of the output rod. FIG. 2 is a diagram showing the protruding position of the output rod of the shift cylinder in FIG. 1, and corresponds to FIG. 1. FIG. 3 is a diagram showing the retracted position of the output rod of the shift cylinder of FIG. 1, and corresponds to FIG. 1. FIG. 4 is a diagram showing another example of the present invention, and corresponds to FIG. 1. FIGS. 5 and 6 are views showing conventional shift cylinders, respectively, and correspond to FIG. 1. 10: Shift cylinder, 12: Cylinder body,
14: Cylinder bore, 18: Inward flange (stopper), 24: Large diameter section, 26: Small diameter section, 28: Inner piston, 32: First outer piston, 34
:Second outer piston, 36:First hydraulic chamber, 38
: Second hydraulic chamber, 44: Output rod, 54: Shift lever (shift member).

Claims

[Claims for Utility Model Registration] In a synchronous mesh type automatic transmission for a vehicle in which gears are automatically changed by a shift member using the synchronous operation of a synchronizer, an output rod for driving the shift member is provided. protruding position, intermediate position,
A shift cylinder of a type that is driven to three positions including a retracted position, the cylinder body having a cylinder bore with both ends closed, and having a large diameter part and a small diameter part adjacent to each other, and is provided in the cylinder bore, a stepped inner piston in which the output rod is connected to the large diameter portion so that the pressure receiving area of the large diameter portion and the small diameter portion are approximately equal; It is slidably fitted between the inner circumferential surface of the cylinder bore and forms a first hydraulic chamber together with the large diameter section and the cylinder body, and when the output rod moves from the protruding position to the intermediate position, the inner an annular first outer piston that assists the piston; and a second annular outer piston that is slidably fitted between the outer circumferential surface of the small diameter portion of the inner piston and the inner circumferential surface of the cylinder bore, and that is slidably fitted together with the small diameter portion and the cylinder body. an annular second outer piston forming a hydraulic chamber and assisting the inner piston when the output rod moves from the retracted position to the intermediate position; is provided so as not to be movable in a direction parallel to the axis of the output rod, and comes into contact with the first outer piston and the second outer piston at an intermediate position of the output rod to eliminate the assisting force of the two outer pistons against the inner piston. A shift cylinder for an automatic transmission for a vehicle, characterized in that the shift cylinder includes a stopper for moving the vehicle.