JPH02105652U

JPH02105652U -

Info

Publication number: JPH02105652U
Application number: JP16802088U
Authority: JP
Priority date: 1988-10-12
Filing date: 1988-12-26
Publication date: 1990-08-22

Description

【図面の簡単な説明】第１図は本考案の第１実施例に係るシストアシ
スト機構を備えた変速操作装置の横断平面図、第
２図は同機構の縦断背面図、第３図は同装置の変
速機に対する組付状態を示す概略斜視図、第４図
は第１図の矢印方向からみた一部切欠側面図、
第５図はバネ部材の正面図、第６図ａは同装置の
レバーシヤフトにおけるシフト力と時間の関係を
示すグラフ、同図ｂは従来装置のレバーシヤフト
における同様の関係を示すグラフ、第７図は本実
施例装置の操作レバーにおける操作力と時間の関
係を示すグラフ、第８図は本考案の第２実施例に
係るシフトアシスト機構を備えた変速操作装置の
横断平面図、第９図は同機構の変形例を示す部分
断面図である。符号の説明、１０，１０Ａ……変速操作装置、
１０ａ，１０ｃ……シフトアシスト機構、１０ｂ
……アキユムレータ（緩衝手段）、１０ｄ……緩
衝手段、１１……第１シヤフト、１２ａ……第２
シヤフト、１２ｂ……レバーシヤフト、１２ｂ１
……レバー部、１３……シリンダ、１４……ピス
トン、１５……バルブスプール、１５ｇ，１５ｈ
……オリフイス、１６ａ……第１連結レバー、１
６ｂ……第２連結レバー、１７……シリンダ、１
８……ピストン、１９ａ，１９ｂ……圧縮スプリ
ング、Ｒ１，Ｒ２……油室、Ｒ３，Ｒ４……隔室
、Ｒ５……油室（第２の流体室）。[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a cross-sectional plan view of a transmission operating device equipped with a cyst assist mechanism according to a first embodiment of the present invention, Fig. 2 is a longitudinal cross-sectional rear view of the same mechanism, and Fig. 3 is the same. A schematic perspective view showing the assembled state of the device to the transmission; FIG. 4 is a partially cutaway side view seen from the direction of the arrow in FIG. 1;
5 is a front view of the spring member, FIG. 6a is a graph showing the relationship between shift force and time in the lever shaft of the same device, FIG. 6b is a graph showing a similar relationship in the lever shaft of the conventional device, and FIG. The figure is a graph showing the relationship between the operating force and time on the operating lever of the device of this embodiment, FIG. 8 is a cross-sectional plan view of a speed change operating device equipped with a shift assist mechanism according to the second embodiment of the present invention, and FIG. 9 is a partial sectional view showing a modification of the same mechanism. Explanation of symbols, 10, 10A...speed change operation device,
10a, 10c...shift assist mechanism, 10b
...Acumulator (buffering means), 10d...Buffering means, 11...First shaft, 12a...Second
Shaft, 12b... Lever shaft, 12b1
... Lever part, 13 ... Cylinder, 14 ... Piston, 15 ... Valve spool, 15g, 15h
... Orifice, 16a ... First connection lever, 1
6b...Second connection lever, 17...Cylinder, 1
8... Piston, 19a, 19b... Compression spring, R1, R2... Oil chamber, R3, R4... Compartment, R5... Oil chamber (second fluid chamber).

Claims

[Claims for Utility Model Registration] (1) A first shaft that rotates when an operation lever rotatably supported in a case cover provided in a transmission case is operated in the shift direction; said first lever;
a second shaft that is attached to the shaft so as to be rotatable in the circumferential direction and slidable in the axial direction, and selectively engages each shift head when sliding and operates the shift heads that are engaged when rotating; It is provided in the speed change operation device, and is assembled in the inner hole of the cylinder in a liquid-tight manner and slidable in the axial direction.
A hollow shaft-shaped piston partitioned into two fluid chambers is assembled into the inner hole of the piston so as to be slidable in the axial direction, and together with the piston constitutes a switching valve mechanism. a rod-shaped valve spool that selectively controls supply and discharge of the valve; and a first shaft that connects the valve spool with the first shaft and transmits the rotation of the shaft to the valve spool to cause the valve spool to slide. and a second connecting lever that connects the second shaft and the piston and transmits the axial sliding motion of the piston to the shaft to rotate the shaft. A shift assist mechanism for a speed change operating device, characterized in that the shift assist mechanism is provided with a buffer means for delaying the displacement speed or correction speed of the relative displacement in the axial direction occurring between the piston and the valve spool. (2) In the cyst assist mechanism according to item 1, the piston includes a piston that is slidably inserted into the second cylinder and divides the inside of the cylinder into two compartments in the axial direction; The accumulator is comprised of a pair of springs that are inserted in each compartment and bias the piston from both sides, and one of the two compartments of the accumulator is connected to one of the two fluid chambers, and both compartments are connected to one of the two fluid chambers. A shift assist mechanism for a speed change operation device, characterized in that the other of the two fluid chambers is communicated with the other of the two fluid chambers. (3) In the shift assist mechanism according to item 1, the buffer means is constituted by a second fluid chamber provided between the piston and the valve spool in the axial direction, and the fluid chamber is connected to the second fluid chamber through an orifice. A shift assist mechanism for a speed change operation device, characterized in that the shift assist mechanism is connected to a part of a working fluid supply/discharge flow path.