JPH081176Y2 - Hydraulic system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION “Industrial field of application” The present invention relates to a hydraulic device for controlling a side clutch or the like installed in a combine mission, for example.

"Prior Art" Conventionally, in a combine mission, the left and right hydraulic cylinders that engage and disengage the left and right side clutches and a relief valve that sets the operating force of the cylinders are integrally configured in the same block, and the cylinders are provided on the upper surface side thereof. There was a technology to mount an electromagnetic hydraulic valve for control.

[Problems to be solved by the invention] The above-mentioned conventional technology has a problem that it is bulky due to the installation of the hydraulic valve and cannot be easily installed on the front surface of the mission etc. where the space between the combine machine body is narrow and the assembly work is troublesome. In addition, there is a problem that the overall configuration must be changed in order to assemble it on a mission in which the mounting intervals of the clutch arms that operate the left and right side clutches are different, and there is little versatility for missions with different specifications. It was

Also, as disclosed in Japanese Utility Model Laid-Open No. 60-1660, there is a technique of arranging a plurality of cylinders at intervals and fixing them to a mounting plate, but since the cylinder and the valve are fixed separately from each other, There are problems that the plate support structure cannot be easily simplified, and the hydraulic piping for hydraulically connecting the cylinder and the valve cannot be easily simplified.

[Means for Solving the Problems] Therefore, in the present invention, in a hydraulic system in which the left and right cylinders and valves are arranged in a mission having left and right clutch arms, a mounting plate is bolted and fixed to the left and right side clutch arm mounting portions of the mission. An oil passage plate forming an oil passage for connecting a cylinder and a valve is bolted to the mounting plate, and left and right cylinders to be connected to the left and right clutch arms are fixed to the oil passage plate, and one of the left and right cylinders is provided with the above It is characterized in that the valve is fixed and a solenoid for switching the valve is mounted farther from the mission than the cylinder.

"Operation" Therefore, the total height can be lowered by mounting the valve by using the opposite side surfaces of the left and right cylinders, and it can be easily mounted even in a narrow mounting space. It can be compactly installed in the vehicle and the handling workability such as disassembling and assembling during maintenance can be easily improved, and by replacing the mounting plate and oil passage plate, etc., for missions with different left and right clutch arm mounting intervals. The cylinder and valve can be easily assembled,
In addition, the hydraulic piping and part of the mounting structure can also be used as an oil passage plate to save labor or simplify the work, simplifying the cylinder support structure and improving versatility. Moreover, the space between the mission and the solenoid is required for heat dissipation. It can be easily formed into various sizes, and can easily maintain the function of the solenoid and improve the durability.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory view of main parts, FIG. 2 is a side view of the combine, and FIG. 3 is a plan view of the combine, in which (1) is a track frame equipped with a traveling crawler (2), and (3). Is a machine frame installed on the track frame (1), (4) is a threshing section in which a feed chain (5) is stretched on the left side, and a handling cylinder (6) and a processing cylinder (7) are built in (8) ) Is a reaper having a cutting blade and a grain transfer mechanism, and (9) is a straw chain (10).
The straw processing unit facing the end, (11) is a driver's cab provided with a driver's seat (12) and a driving operation unit (13), and (14) is a machine stand (3)
(16) is an engine part which is arranged at the rear part on the right side of the engine and which internally has the engine (15), (16) is a grain tank which is arranged in front of the engine part (14) and stores the grains from the threshing part (4), 17) (1
8) is a vertical and upper discharge auger for taking out the grains in the grain tank (16) to the outside, (19) is a side clutch lever,
(20) is a main transmission gearshift lever, which is configured to continuously perform cutting and threshing work.

Further, as shown in FIG. 4, the gear (21) transmitting the output of the engine (15) and the axle (22) of the crawlers (2) (2).
The left and right side clutch gears (24, 24) mesh freely with the gears (23), (23) of (22), and the left and right side brakes are coaxial with each side clutch gear (24) (24). (25) Place (25).

The side clutch gears (24) (24) are engaged and connected to the clutch arms (26) (27), and the clutch arms (26) (27) are connected to the piston rods (30) of the hydraulic cylinders (28) (29). ) (30) abuttingly connected, clutch arm (26) (27) by hydraulic cylinder (28) (29) control
The side clutch gear (24) is turned on and off and the brake (25) is operated in conjunction with each other.

As shown in FIG. 5, the left and right solenoids (31) (3
A hydraulic pump (3) equipped with a 3-position 5-port electromagnetic hydraulic valve (32) having (1) and driven by an engine (15).
3) through the valve (32) to the hydraulic cylinder (28) (29)
Is connected, the side clutch lever (19) selectively actuates each solenoid (31) (31), and the cylinder (28) (29) is selectively actuated to make a left / right turn. At the same time, the return springs (34) (35) are urged to the pistons (29) (30).

Also, the A and B ports (36) (37) connected to the left and right cylinders (28) (29), the P port (38) connected to the pump (33), and the cylinder T connected to the oil tank (39). The port (40) and the pump T port (41) are provided in the hydraulic valve (32), and the P port (38) and the cylinder T port (40) are switched and connected to the A or B port (36) (37). , When the valve (32) is neutral, the A and B ports (36) (37) are connected to the cylinder T port (40) and the P port (38) is connected to the pump T port (41). A return oil path for the tanks (39) of (28) and (29) and a pressure oil return path for the hydraulic pump (33) are separately formed in the valve (32), and the pump (33) when switching the valve (32) is formed. ) It is configured to prevent interference between the pressure oil and the return oil of the cylinder (28) (29).

Further, a variable relief valve (42) connected between the P port (38) and the pump T port (41) is provided, the valves (32) (42) are arranged in parallel, and the pilot pressure of the relief valve (42) is set to the P port. (38) Pressure and relief spring (43)
Balance the pressure with the relief valve (42) spool (4
4) and the lever (4
5) A relief rod (46) that changes the pressure of the relief spring (43) by operation is provided. The lever (45) is connected to the travel speed change lever (20) by a wire (47), etc. The pressure of the relief spring (43) is proportionally increased, while the pressure of the relief spring (43) is reduced by low speed operation.

Further, as shown in FIGS. 1 and 6 to 8, the left cylinder (28) and the relief valve (42) are integrally formed in the same block (48), and the cylinder (28) and the relief valve (42) are integrated. ) The hydraulic valve (32) is attached to the side surface of the block (48) which is the side portion of the cylinder), and the left and right cylinders (28) are provided with an oil passage plate (49) that is an L-shaped front view as a mounting plate.
(29) is fixed to the oil passage plate (49) with a space provided, and a high pressure oil passage (50) for connecting the B port (37) to the right cylinder (29) and a right cylinder ( An oil passage (51) for returning oil for connecting the drain of (29) to the tank (39) is provided in the oil passage plate (49), and each cylinder (28) (29) and each valve (32) (42). Are connected as shown in FIG.

Further, the vehicle is equipped with a traveling mission (52) arranged in front of the truck frame (1) and the machine base (3), and the axle (22), side clutch gears (24) (24) and brake (25) shown in FIG. ) (25) etc. are attached to the mission (52), and both ends of the mission (52) are bolted to the outside of the front surface of the mission (52).
4), the oil passage plate (49) is integrated with the mission mounting plate (54) by the oil passage plate fastening mounting bolts (55) and the actuator mounting bolts (55) that also serve as oil passage plate fastening. As shown in FIG. 7, the fixed portion is fixed, and the curved portion of the high pressure oil passage (50) is located below the right cylinder (29), and the mounting bolt (55) is attached to the curved portion of the oil passage (50). Are arranged close to each other so that the packing surface pressure at the portion is increased.

Then, as shown in FIG. 8, each cylinder (28) (29) and each valve (32) (42) are connected to the oil passage plate (49) and the mounting plate (5).
As shown in FIG. 7, attach the piston (30) (30) to the front intermediate part of the mission (52) with the piston (30) (30) tip end surface of each cylinder (28) (29), and attach it to each clutch arm (26). ) (27), push the piston (30) downward with pressure oil from the hydraulic pump (33), disengage the side clutch gear (24), and then control the side brake (25). It is configured to let.

As can be seen from the above, the left and right clutch arms (26)
Left and right cylinders (28) on the mission (52) with (27)
In a hydraulic system in which (29) and valves (32) (42) are arranged, a mounting plate (54) is bolted and fixed to the left and right side clutch arm (26) (27) mounting portions of a transmission (52), and a cylinder ( 29) and the oil passage plates (49) forming the oil passages (50) (51) for connecting the valves (32) (42) are bolted and fixed to the mounting plate (54), and the left and right clutch arms (2
6) Left and right cylinders (28) (29) to be connected to (27) are fixed to the oil passage plate (49), and left and right cylinders (28) (29)
The valves (32) and (42) are fixed to either one of them, and a solenoid (31) for switching the valves (32) is attached to the cylinder (28) farther from the mission (52).

In addition, the oil passage plate (49) and the mounting plate (54) are integrally formed, and a drill hole is opened to form the high pressure and return oil passages (50).
(51) can be easily formed to eliminate the packing mating surface, and at the block side of the right cylinder (29), a part of the high pressure oil passage (50) is formed with a drilled hole, and the oil passage (50 It is also possible to easily eliminate the curved portion.

Further, as shown in FIG. 9, the oil passage plate (49) has a trapezoidal shape when viewed from the front, and the hypotenuse of the trapezoid forms the upper end surface (49a) of the oil passage plate (49) so that dust such as straw can cause oil passage plate (49 ) The structure that slides down from the upper end surface prevents dust accumulation and the right cylinder (29)
It is also possible to form the high pressure oil passage (50) to be connected to the shortest distance.

"Effects of the Invention" As is apparent from the above-described embodiments, the present invention has the left and right cylinders (28) (29) and the valves (32) (42) in the mission (52) including the left and right clutch arms (26) (27). In the hydraulic system to be installed, the mounting plate (54) is bolted to the left and right side clutch arm (26) (27) mounting portions of the mission (52), and the cylinder (29) and valve (32) are fixed.
(42) Oil passage plate (4) forming oil passages (50) (51) for connection
9) are bolted and fixed to the mounting plate (54), and the left and right cylinders (28) and (29) connected to the left and right clutch arms (26) and (27) are fixed to the oil passage plate (49). 28) The valve (32) on either one of (29)
The solenoid (31) that fixes the valve (32) by fixing the valve (42) is installed in the transmission (5) rather than the cylinder (28).
2) Installed separately from the left and right cylinders (2
8) The total height can be lowered by mounting the valves (32) (42) using the opposite side surfaces of (29), and can be easily mounted even in a narrow mounting space.
The (29) and valves (32) (42) can be made compact and placed compactly on the front of the mission (52), etc., making it easy to improve handling workability such as disassembling and assembling during maintenance. By replacing the mounting plate (54) and the oil passage plate (49) with the mission (52) having different specifications for the clutch arm (26) (27), the cylinder (28)
(29) and valves (32) (42) can be easily assembled, and part of the hydraulic piping and mounting structure is used for the oil passage plate (4
By combining the use of 9), it can be labor-saving or simplified, and the cylinder (2
8) (29) The support structure can be simplified and the versatility can be easily improved, and the space between the mission (52) and the solenoid (31) can be easily formed to the size required for heat dissipation. The function of (31) and the durability can be easily improved.

[Brief description of drawings]

FIG. 1 is a bottom view of an essential part showing an embodiment of the present invention, FIG. 2 is a side view of a combine, FIG. 3 is a plan view of the combine, FIG. 4 is a driving drive explanatory view, and FIG. Hydraulic circuit diagram, FIG. 6 is a side view, FIG. 7 is a front view, FIG. 8 is a mounting view, and FIG.
The figure is an illustration of a modified structure. (26) (27) …… Clutch arm (28) (29) …… Hydraulic cylinder (32) (42) …… Hydraulic valve (49) …… Oil passage plate (50) (51) …… Oil passage (52 ) …… Mission (54) …… Mounting plate

Claims (1)

[Scope of utility model registration request] 1. A hydraulic system in which left and right cylinders (28) (29) and valves (32) (42) are arranged in a mission (52) having left and right clutch arms (26) (27). Attach the mounting plate (54) to the left and right side clutch arms (26) (27) by bolts, and connect the oil passages (50) (5) to the cylinders (29) and valves (32) (42).
The oil passage plate (49) that forms 1) is fixed to the mounting plate (54) by bolts, and the left and right cylinders (28) (29) that are connected to the left and right clutch arms (26) (27) are connected to the oil passage plate (54). 49)
The left and right cylinders (28) and (29) with the valves (32) and (42) fixed to the valves (3
2) The solenoid (31) for switching the cylinder (28)
A hydraulic system characterized by being installed farther from the mission (52) than the transmission.