JPS6221164U

JPS6221164U -

Info

Publication number: JPS6221164U
Application number: JP11008185U
Authority: JP
Priority date: 1985-07-17
Filing date: 1985-07-17
Publication date: 1987-02-07

Description

[Brief explanation of drawings]

第１図乃至第７図の図面は本考案の一実施例を
示し、第１図は要部の縦側断面図、第２図は全体
簡略側面図、第３図は油圧装置の縦側断面図、第
４図は第１図とは異なる作動体勢を示す要部の縦
側断面図、第５図は後輪タイヤの側面図、第６図
は要部の断面図、第７図は同分解斜視図、第８図
は従来一例を示す要部の縦側断面図である。１……３点リンク機構、２……作業機、３……
トラクタ車体、５……作業機昇降用油圧装置、１
１……油圧シリンダ、１５……制御弁、１６……
油室、１７……油路、２７……作動体、２８……
連通孔、２９，３０……第１・第２ストツパ、３
１……弾機、３３……操作軸、３５……弁体。 The drawings in FIGS. 1 to 7 show an embodiment of the present invention, in which FIG. 1 is a vertical cross-sectional view of the main parts, FIG. 2 is a simplified side view of the whole, and FIG. 3 is a vertical cross-section of the hydraulic system. Figure 4 is a longitudinal sectional view of the main parts showing a different operating position from Figure 1, Figure 5 is a side view of the rear tire, Figure 6 is a sectional view of the main parts, and Figure 7 is the same. An exploded perspective view and FIG. 8 are vertical sectional views of main parts showing an example of the conventional technology. 1...Three-point linkage mechanism, 2...Work machine, 3...
Tractor body, 5... Hydraulic system for lifting and lowering work equipment, 1
1... Hydraulic cylinder, 15... Control valve, 16...
Oil chamber, 17... Oil passage, 27... Operating body, 28...
Communication hole, 29, 30...first and second stopper, 3
1... Bullet machine, 33... Operating shaft, 35... Valve body.

Claims

[Scope of utility model registration request]

A single-acting hydraulic cylinder 11 is controlled by a control valve 15 to drive the working machine 2 up and down and discharges hydraulic oil from an oil chamber 16 when the working machine 2 is lowered, and an oil passage 17 between the control valve 15 and the oil chamber 16 Therein, there is an actuating body 2 in which the longitudinal direction of the oil passage 17 and the axial direction are aligned.
7 is movable in the axial direction, and the actuating body 27 has a
A communication hole 28 is formed to communicate the control valve 15 side and the oil chamber 16 side of the oil passage 17 with respect to the actuating body 27, and the actuating body 27 is connected to the control valve 15 of the oil passage 17 with respect to the axial direction.
The ammunition 31 that urges the side and the oil passage 17 of the actuating body 27
A first stopper 29 that restricts the movement of the actuating body 27 toward the control valve 15 side, and a second stopper 30 that restricts the movement of the actuating body 27 toward the oil chamber 16 side of the oil passage 17. The valve body 35 is inserted into and removably into the communication hole 28 from the side, opens and closes the communication hole 28, and sets the speed of draining oil from the oil chamber 16 depending on the amount of insertion into the communication hole 28.The valve body 35 is freely movable in the axial direction. In preparation for
By moving the valve body 35 in the axial direction, the insertion amount of the valve body 35 into the communication hole 28 can be set, and with the communication hole 28 closed by the valve body 35, the actuating body 27 is moved to the second stopper 30. A tractor working machine fall speed adjusting device characterized by comprising an operating means that can be pressed and fixed against a tractor.