JPS585102A - Oil press apparatus for agricultural tractor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Conventionally, the hydraulic pressure of the 7W run machine such as agricultural tractor front machine is distributed from the main hydraulic controller at the rear of the machine, and the main hydraulic pressure is distributed from the roll pulp. Because of the action of the control valve's relief pulp, the 7-lint production scale, for example, caused the 7-w loader to go too high and cause the aircraft to overturn. A hydraulic circuit that includes the main hydraulic control device κ is interposed with an auxiliary hydraulic control device that mainly operates the handling machine to control the auxiliary hydraulic system when the field pulp is in the neutral state and the auxiliary hydraulic relief pulp is in the operating state. The hydraulic circuits are configured to communicate with each other, and the purpose is to improve the safety of 7W engine work. Embodiments of the present invention will be described below based on the drawings.

Ryutsushi Expansion Nurse (Hydraulic extraction part installed on phantom《1)K
is a high-pressure oil passage ()) that communicates between the hydraulic pump (←) installed in the ζ cylinder case (2) and the auxiliary hydraulic controller (7) that raises and lowers the roll pulp (); High pressure oil III (s) communicating between the four-leaf pulp (6) and the main control pulp (a) attached to the rear side of the fuselage (1), and the auxiliary hydraulic control pulp (6) ) and the electric shock case ψ) are connected to each other.
When the high pressure oil passage (1) and the high pressure oil passage (9) are provided, a hydraulic relief pulp (b) is interposed between the high pressure oil passage (1) and the high pressure oil passage (9).
Then, by operating the sub-hydraulic control lever, the sub-hydraulic controller (roll pulp (6)) outputs hydraulic pressure via the oil 110464 connected to the upper part of the 7w antlinda (b) and (to). The upper sK of the cylinder (b) a flows through the oil passage (b) which communicates with the lower part of the 17-inch cylinder 61 (b) to the 70-inch cylinder of4 (
The lowering position where the hydraulic pressure is released to the lower part of the cylinder (B) - 1 - 1 Conversely, the hydraulic pressure is distributed to the lower part of the 7W cylinder (B) through the oil passage @ (B). ,
The oil pressure at the top of the front cylinder (b) (2) is changed to oil lI (
(b) The raised position (2) where the water is released through the ring to the electric cylinder case (3), and the communication between the 70 cylinder cylinder (b) (b) and the electric cylinder case (1) is cut off, and the high pressure oil line ( 9) Main hydraulic pressure controller through seal pulp (8)
) is constructed so as to be stopped by conversion into three positions, including the neutral position (2). The main hydraulic pressure roll pulp (8) on the rear side of the fuselage (1) flows through the high pressure oil passage (9) to a cylinder (m not shown),
) K111 working machine that can be raised and lowered at the rear (not shown)
Lifting position to raise and lower or rotate in the 1-q direction.
, when the hydraulic pressure of the lift cylinder and the hydraulic pressure flowing through the high-pressure oil line (9) are released and the work is lowered to the descending position 1 and the communication to the lift cylinder is cut off, the high pressure The system is configured to automatically move up to three positions including a neutral position where the hydraulic pressure flowing through the oil passage is released to the home. - indicates high pressure oil passage (ηK
i! ! The main hydraulic relief pulp is passed through the main hydraulic relief pulp, and the relief pressure is maintained constant and heavy by the secondary hydraulic relief pulp (b).
It is constructed so as to communicate with the extraction pressure -0- is the t-in) -1 lever, and - is the fluid pressure.

When performing the work shown in the following explanation of the action of 7w>shield φ), first operate the main hydraulic control lever to move the main hydraulic control pulp (・) to the neutral position. Then, by operating the sub-hydraulic control valve (b) and switching the sub-hydraulic control pulp (6) to the lower position of the 70mm loader (!i), the hydraulic pump (4) will discharge. The hydraulic pressure is high pressure oil line (9),
When hydraulic pressure flows into the upper part of the 7w cylinder (b) (to) through the oil passage (2) (2), the oil pressure at the lower part of the 4&C 711 cylinder (2) (b) flows through the oil passage fs (2). Then, Tushi Souns (31) escaped and ran away.
The season is declining. When the front loader (5) touches the ground, the auxiliary hydraulic pressure relief pulp (B) operates, and the hydraulic pressure escapes to the Mitsushi seal case (B) via the high pressure oil path (9).

At that point, move the auxiliary hydraulic control pulp (2) to the application position.
When it returns to the high pressure oil line (TE), the hydraulic pressure escapes to the Mitsushi nurse (8) via the high pressure oil line (TE).The aircraft (1) moves forward -t7W
Fill the pan nut of the loader (6) with soil and operate the oil hydraulic sink lever (b) to control the auxiliary hydraulic pressure.
When Le Palve (・) is in the raised position, hydraulic pressure flows to the bottom of the 70-inch cylinder ■, and the front cylinder (
The hydraulic pressure at the top of 2) is released to the housing case (8),
7. Raise the loader (5) to a predetermined height. When the front loader (6) reaches a predetermined height K, the auxiliary hydraulic reel pulp a is activated and stops the front leader (6) from rising.
Return to the neutral position - 0 When raising or lowering the work equipment attached to the rear of the machine body (1) from the arm H611, the auxiliary hydraulic control side roll pulp (6) should be switched to the neutral position CIIK. Then, the main hydraulic control pulp (8) is switched between the raised position, the lowered position -, and the neutral position (2) K using the main hydraulic control lever (main hydraulic control lever) to raise and lower the work equipment. Relief pulp shaft operates - Required K This invention interposes an auxiliary hydraulic pump (reel pulp) in the high-pressure oil path connecting the hydraulic pump and the main hydraulic controller that lifts and lowers the working machine attached to the rear of the tractor (reel pulp). To,
Sub-hydraulic] When the neutral position of the So-ru pulp and the sub-hydraulic relief pulp is activated, the hydraulic pressure is configured to flow to the main hydraulic control pulp side via the high-pressure oil path, and the sub-hydraulic control is activated.
- When the front machine of a 7W printer, etc., which goes up and down due to the operation of the oil pulp, is at the upper limit, the print machine is raised by the auxiliary hydraulic relief pulp without being affected by the main hydraulic relief pulp. Because it is possible to stop the lift so that it does not occur, agricultural tractors can be operated more safely than before.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; No. ZFG is an overall view II, FIG. 3 is an oil Bi, II circuit diagram, a rear view of the third hydraulic outlet, and FIG. 4 is a hydraulic outlet. The side view of sWJ is the side cross section of the hydraulic pressure outlet.Explanation of the main symbols (1)...11 bodies, (ri...Mitsushi ln nurse, (
1)-flkBEI! Output part, (4)...Hydraulic pressure pump, (i)-y-n) Loader, (8)...Sub-hydraulic pressure pump)
Roll pulp, (Ma)--m1ss, (a)--Main hydraulic controller) W-Le pulp, (9)--High pressure oil path, (B)
... Sub-hydraulic relief pulp, -17 cylinder),
-...S7 Toarm, H...Main hydraulic relief pulp O 12 Fig. 4111 1

Claims (1)

[Scope of Claims] An auxiliary control valve is installed in a high-pressure oil path that connects a hydraulic pump and a main hydraulic control resource pulp that lifts and lowers a working machine attached to the rear of the Schick. A hydraulic system for an agricultural tractor characterized by being configured such that hydraulic pressure flows to the primary pulp side via a high-pressure oil path during the neutral position of the control field pulp and the sub-hydraulic relief pulp. .