JPS5913745U

JPS5913745U - Hydraulically operated gear transmission

Info

Publication number: JPS5913745U
Application number: JP10836982U
Authority: JP
Inventors: 長谷川　繁一; 福井　哲
Original assignee: 株式会社クボタ
Priority date: 1982-07-16
Filing date: 1982-07-16
Publication date: 1984-01-27
Also published as: JPS627883Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

図面は本考案に係る油圧操作式ギア変速装置の実施の態
様を例示し、第１図は伝動構造全体の構成図、第２図は
変速操作用油圧回路図、第３図及び第４図は変速操作手
段と油圧クラッチの関係を示す要部拡大縦断面図であっ
て、第３図は変速中立状態、第４図は変速状態を示して
いる。第５図は別の実施例における伝動構成図、第６図
は別の実施例での変速操作用油圧回路図である。１５・・・・・・油圧クラッチ、１８・・・・・・シン
クロメツシュ式ギア変速機構、１８ａ・・・・・・パイ
ロット弁、。２５・・・・・・シフトフォーク、２６・・・・・・ピ
ストンロッド、′２７・・・・・・パイロット弁ケース
、２８ａ。２８ｂ・・・・・・シリンダ室、３３・・・・・・パイ
ロット式流路切換弁、３５ａ、　３５ｂ−−−−−−ポ
ート、３６ａ。３６ｂ・・・・・・環状溝、３７・・・・・・ドレン空
間、■・・・・・・変速選択用Ｓ＋＋御弁両弁Ｌｌ・・
・・・・パイロット油路。甲甲The drawings illustrate an embodiment of the hydraulically operated gear transmission according to the present invention, in which Fig. 1 is a block diagram of the entire transmission structure, Fig. 2 is a hydraulic circuit diagram for shift operation, and Figs. 3 and 4 are diagrams. FIG. 3 is an enlarged vertical cross-sectional view of a main part showing the relationship between the speed change operation means and the hydraulic clutch, with FIG. 3 showing the neutral speed change state and FIG. 4 showing the speed change state. FIG. 5 is a transmission configuration diagram in another embodiment, and FIG. 6 is a hydraulic circuit diagram for speed change operation in another embodiment. 15... Hydraulic clutch, 18... Synchromesh type gear transmission mechanism, 18a... Pilot valve. 25...Shift fork, 26...Piston rod, '27...Pilot valve case, 28a. 28b...Cylinder chamber, 33...Pilot flow path switching valve, 35a, 35b---Port, 36a. 36b... Annular groove, 37... Drain space, ■... S++ control valve Ll for speed change selection...
...Pilot oil line. carapace

Claims

[Scope of Claim for Utility Model Registration] The pressure oil supply state to the hydraulic operating means that drives the shift fork 25 of the sink 6-mesh type gear transmission mechanism 18 by forward and reverse shifting of the piston rod 26 can be controlled by a two-way sink valve for speed change selection. The hydraulic clutch 15 provided in series with the gear transmission system is controlled by a pilot type flow path switching valve 33, and the hydraulic operating means controls the switching valve 33. A case 27 is a hydraulically operated gear transmission configured with a pilot valve 18a for pilot pressure application control, and has cylinder chambers 28a and 28b that support the piston port and both ends of the rad 26.
are provided with ports 35a and 35b connected to the hydraulic clutch control pilot oil passage PL1, and the piston rod 2
A front port 35a is formed on the outer peripheral surface near the end of the rod 26 by shifting the rod 26. Annular grooves 36a and 36b for releasing pilot oil pressure are formed in communication with or cut off from the piston rod 35b, and the piston rod 26
is at the stroke end, one cylinder chamber 28a or 28b to which pressure oil is supplied for shifting the piston rod 26, and one port 35a or 35.
b and the other port 35b or 3.
5a is closed, and when the piston rod 26 is removed from the stroke end, the ports 35a, 35b and the drain space 37 provided outside the cylinder chambers 28a, 28b are communicated via the annular shapes 1136a, 36b,
A hydraulically operated gear transmission characterized in that the annular grooves 36a and 36b are configured to have a wide width in the axial direction of the piston rod.