JPS59173698U

JPS59173698U - Hydraulic switching valve for forklift trucks

Info

Publication number: JPS59173698U
Application number: JP6765183U
Authority: JP
Inventors: 天笠　三夫; 赤沢　勉
Original assignee: 桐生機械株式会社
Priority date: 1983-05-06
Filing date: 1983-05-06
Publication date: 1984-11-20

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]

第１図は油圧系統を併記した実施例の断面図、第２図は
別の油圧系統図、第３図はクランプ動作説明図、第４図
はアンクランプ動作説明図、第５図はサイドシフト動作
説明図である。１：本体、２：左弁体連通孔、３：弁体嵌挿孔、４ニブ
ランジヤ嵌挿孔、５Ａ：左連通孔、５Ｂ：右連通孔、６
：右弁体連通孔、７：軸心連通孔、８：バルブ連通孔、
９Ａ、　９Ｂニスプリング、１０Ａ。１０Ｂ＝キヤツプ、１４ニブランジヤ、１５：貫通油路
、２４：弁座、２５：軸心小孔、２６：弁体、２７：貫
通口、２９：油圧切換作動弁、３０：弁体胴部、３１：
弁体頭部、３３：内端面、３４：截頭端面、３５：突起
棒、３６：プランジヤ胴部１．３８：軸心油路。２Fig. 1 is a sectional view of the embodiment including the hydraulic system, Fig. 2 is another hydraulic system diagram, Fig. 3 is an explanatory diagram of clamping operation, Fig. 4 is an explanatory diagram of unclamping operation, and Fig. 5 is a side shift diagram. It is an operation explanatory diagram. 1: Main body, 2: Left valve body communication hole, 3: Valve body insertion hole, 4 Nib plunger insertion hole, 5A: Left communication hole, 5B: Right communication hole, 6
: Right valve body communication hole, 7: Axis communication hole, 8: Valve communication hole,
9A, 9B Nispring, 10A. 10B=cap, 14 nib plunger, 15: oil passage through, 24: valve seat, 25: axial small hole, 26: valve body, 27: through port, 29: hydraulic switching valve, 30: valve body body, 31 :
Valve body head, 33: inner end surface, 34: truncated end surface, 35: protruding rod, 36: plunger body 1.38: axial oil passage. 2

Claims

[Scope of utility model registration request]

On the same axis of the valve body, a valve body insertion hole that allows the valve body to slide in the axial direction is bored in one of the short axial small holes that form the central valve seat, and A plunger fitting hole that allows the plunger to slide in the axial direction is bored in the other side of the center small hole, and extends radially to the outside of the valve body approximately in the middle of the side wall of the valve body fitting hole. A left valve body communication hole and a right valve body communication hole are bored, an axis communication hole extending radially to the outside of the valve body is bored in the small axis hole, and a hole is formed in the side wall of the plunger insertion hole. In the above, a valve communication hole is provided near the small hole in the axis center, and a left communication hole and a right communication hole are provided near the outer end in the radial direction to the outside of the valve body. , a valve body having a truncated conical head that can come into contact with the valve seat, and a valve body having a through hole extending radially through the body, the valve body having a truncated conical head that can come into contact with the valve seat; The valve body is biased by a spring in the direction of contacting the valve seat, and a plunger is inserted into the plunger insertion hole, and the plunger has an inner end surface formed on the truncated end surface of the conical head of the valve body. A protruding rod is provided in a protruding manner so as to be able to come into contact with the body of the plunger, and an oil passage is formed in the body of the plunger in the radial direction, and an axial oil passage is formed in the axial direction from the oil passage to the outer end surface. It is biased by a spring in the direction of the protruding rod, and the left valve body communication hole and the right valve body communication hole are always communicated through the through hole of the valve body regardless of the position of the valve body. The oil passage is always communicated with the valve communication hole regardless of the position of the plunger, and communication between the left communication hole and the right communication hole is normally blocked by the body of the plunger, so that no hydraulic pressure is applied to the through oil passage. The protruding rod of the plunger presses against the truncated end surface of the valve body head, and at the position where the valve body head moves in the direction away from the valve seat, the body of the plunger is unblocked and the left communication hole is opened. and a right communication hole communicate with each other, and the outer ends of the valve body insertion hole and the plunger insertion hole are both sealed. Hydraulic switching valve for trucks.