JPS6146718A - Travel transmission device for combine - Google Patents

Abstract

PURPOSE:To enable a travel transmission device and other equipments as a whole to be well-arranged in a compact condition, by arranging a pump for a static hydraulic pressure speed change unit in the vicinity of a travel speed change gear unit so that a motor is positioned on the side laterally opposite to the pump. CONSTITUTION:A driver's seat 3 is positioned on the left side and in the vicinity of a travel speed change gear unit 2, and a reaping frame 7 carrying grass sorting members 4, 4, a grain stalk rise-up device 5 and a reaping knife 6 is positioned on the right side of the unit 2. Further, there are provided an engine 8 and a thresher 9 in the rear of the unit 2. In a static hydraulic pressure speed change unit 10 for transmitting the rotating power of the engine 8 to the travel speed change gear unit 2 after speed reduction, a pump 12 is attached on the upper part of right side section of an attaching base member 11 and a motor 13 is attached to the lower part of right side section of the attaching base member 11. With the thus arranged static hydraulic speed change unit 10, the base member 11 is secured to the gear casing 14 of the unit 2 so that the pump 12 may be arranged in the close vicinity of the upper section of the unit 2 while the motor 13 is arranged to be shifted from the position above the unit 2.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a travel transmission device for a combine harvester.
A hydrostatic transmission device, which is used to continuously variable speed drive the traveling transmission device located at the front of the combine to drive the traveling axle, is located entirely in the narrow space at the front part. This paper proposes a running transmission device that is devised so that it can be arranged compactly.

[Conventional technology]

The traveling transmission for driving the traveling axle is usually located near the front lower part of the center in the left-right direction of the combine, and the driver's seat and the left KFI reaping frame are located, for example, on the right side of the traveling transmission. However, since the culm pulling device is installed in front of the traveling transmission and the threshing device is installed in the rear, the area around the traveling transmission is a narrow space with little margin, and the engine and this traveling transmission are connected in a narrow space. It is difficult to compactly arrange a hydrostatic transmission to be provided at an intermediate position between the transmission and the transmission in a position close to the traveling transmission.

[Problem that the invention seeks to solve]

Therefore, this invention aims to provide a
The hydrostatic transmission has been devised so that it can be installed easily.

[Means for solving problems]

In order to solve the above problems, the present invention has taken the following technical measures.

That is, the pump A3 of the hydraulic transmission is located on the road side of the traveling transmission (2) for driving the traveling axles (LA) (LB) 4 and close to this traveling transmission (2). , and is a travel transmission device for a combine harvester, which is arranged so that the motor 0 of the hydrostatic transmission which drives the travel transmission (2) is located on the opposite left and right side with respect to the pump υ when viewed from the front.

[Example and operation]

Next, one embodiment of the present invention will be described based on the drawings.

As shown in Fig. 1 as a front view of the combine, Fig. 2 as a left side view, and Fig. 3 as a plan view of Fig. 1, the left and right running axles (] a ) (1b7f) Device(
2) is provided at the front lower part of the combine harvester at approximately the center in the left-right direction, and the driver's seat (3) is located near the left side of the traveling transmission (2), and the weeding body (3) is located on the right side. 4)(4)
There is a reaping frame (7) that supports the culm lifting device (5), reaping blade (6), etc., and the engine (8) is located at the rear.
and a threshing device (9) are provided. The hydraulic transmission system that changes the speed and transmits the rotational power of the engine (8) to the traveling transmission (2) is equipped with a pump AQ installed on the upper right side of the mounting base I, and a motor U'R mounting base (Iυ). Using the one attached to the lower part of the left side, fix the mounting base 6D' on the top of the traveling transmission (21) sufficiently close to the pump t12 with the traveling transmission (powder gear case (141)). The motor 03 is located at a position outward from above the traveling transmission (2), and drives the rotation of the engine (8) to the input shaft ae of the pump a2 via the winding transmission mechanism (1!9'). , as shown in the vertical front view in Figure 4, the traveling transmission (
2) is connected to the input shaft a'Or and the output shaft α@ of motor 0.

The traveling transmission (2) engages and disengages the transmission gear QD of the input shaft αη from the counter gear group of the counter shaft, and freely moves only the left and right output shafts (22a) and (22b) in the axial direction. Clutch gear (2)
By engaging with the gear (to) of and disengaging from the idle rotating gear (a), the output gear @ (to) fixedly attached to the traveling axle (xa) (]b) becomes a clutch. The illustrated mounting base (Iυ) is driven by a gear (C) or (I), as shown in FIG.
A plurality of pump cylinders (1) provided in the cylinder block (c) of the pump (X6) and a plurality of respective motor cylinders (to) provided in the cylinder block (5) of the motor 0, Oil passages (A,) that communicate with each other.

(7,), -... are drilled n, and the pump cylinder (
1) and the feed valve (7).
n, ), (n,).

..., the excessive pressure acting on the motor (IS) is removed from tank 01.
1, oil passages (n, ), (n2) that communicate the respective motor cylinders (to) and high pressure relief valves (to
),... are provided respectively.

The pump α2 and motor α3 in the above-mentioned silent hydraulic transmission f (II) are known ones,
When the input shaft altl of the pump ■ rotates, the cylinder block (c) fixedly attached to the input shaft ae and the pump cylinders (7), (2), etc. The pistons (2), . The variable swash plate (to) that is in contact with is installed inside the pump body so that it can only be swung left and right along the axial length direction of the input shaft Q by the speed change lever (to), as shown in Figure 5. When the abutment surface (35a) of the variable swash plate (to) is perpendicular to the input shaft (lf), the pump piston (to)... will not move despite the rotation of the input shaft αe. Since no pressure is generated in the oil passages C□), (7,),... The motor piston C11, which is installed inside the motor cylinder and is jointly supported to the output shaft or one thrust plate, does not perform any piston movement, so
The thrust plate (to) that is in contact with the slanted side surface (4) a of the fixed swash plate [D], which is fixed to the motor body 0Irc1, the cylinder block (5), and the output shaft a field also do not rotate. . When the gear shift lever a is tilted to the forward position shown by the two-dot chain line in Figure 1, the variable swash plate (up)
Since the abutting surfaces (35a) of the pump pistons (35a) are also inclined in the same direction, nearly half of the several pump pistons (35a) are tilted in the same direction.
The oil in the pump cylinder (e) is pressurized and the oil passage (!1)...
・The remaining pump piston (2) will suck the oil from the motor cylinder (to) into the pump cylinder (2) from the remaining oil passage, and the motor that received the pressure oil will The piston @ is fixed to the swash plate 11 via the pressure grade (to) due to its piston movement.
The motor piston (to) and cylinder block (b) rotate the output shaft asy so as to slide down the inclined side surface (4a) of the fixed swash plate (Ql), and the variable swash plate (to) comes into contact with the motor piston (to) and cylinder block (b). By changing the angle of inclination of the surface (35a), the piston operating distance of the pump piston (to) changes, the pressure of oil changes, and the rotational speed of the output shaft a8 changes according to the angle of inclination. Also, move the gear shift lever (to) to 1st position.
When tilted to the reverse position (shown by the dotted line in the figure), the pressure oil sent out from the pump shaft acts in the opposite direction to the forward movement, so the output shaft assembly s rotates in the opposite direction to the forward movement. This is what you will do.

In the embodiment described above, the charge pump @, which is located in the space above the motor αj on the opposite side of the mounting base I to which the pump υ is mounted, is mounted on the mounting base aυ, and this charge pump 4 is controlled by the input shaft Ql. The oil pump 141t for the hydraulic equipment station is attached to the outer 11 part of the charge pump (2) so as to be driven.

Input shaft (IIIc) Connect the drive shafts of the charge pump 4 and the oil pump, and install the control valve for the hydraulic equipment (4) on the outside of the oil pump (b), and the control valve for the oil pump (c). It supplies the hydraulic oil generated by the charge pump (from the suction boat of the charge pump) to the suction boat of the oil pump (f).
-The oil pump e19) is pressurized by the IfC and sent out via the control valve elt. It will be supplied by a hydraulic device such as a cylinder.

In the embodiment described above, the charge pump (to) and the oil pump H are installed in the space of the mounting base aυ where the pump a and the motor α are not installed. Since it is installed,
The hydrostatic transmission H, oil pump/PJ, etc. can be arranged compactly by reducing the amount of lateral protrusion, and the input shaft ae of the pump Qffi can be used to connect the charge pump 4, oil pump/PJ, etc. , the drive shaft can be driven without the need to separately provide a special drive shaft, and the drive shaft is simplified. In Figure 2, the symbol Gin is the floor,
The symbol is an operation box.

The traveling transmission device for a combine harvester according to the present invention is configured as described above, and has traveling axles (1a) (lb)?
The pump shaft of the hydrostatic transmission is located close to the traveling transmission (21) on the road, and the traveling transmission (2) for driving is located on the road. Since the motor of the hydrostatic transmission Ql to be driven is located on the left and right sides opposite to the pump t13 when viewed from the front, for example, the driver's seat (3) is on the right, and the driver's seat (3) is on the left. The reaping frame (η is located at The bong a of the silent hydraulic transmission (4) is placed close to the traveling transmission (2) placed in the space, and the motor (am) is located on the left and right side opposite to the pump housing (a) when viewed from the front. Since the motor eel is placed in This meant that it could be arranged in a well-organized and compact manner, and by combining the hydraulic transmission system and the traveling transmission system, it was possible to install a continuously variable transmission in a compact manner.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a front view of the combine harvester, Fig. 2 is a left side view of Fig. 1, Fig. 3 is a plan view of Fig. 1, and Fig. 4 is a plan view of the combine harvester. FIG. 5 is a longitudinal sectional front view of the main part of the engine, and FIG. 5 is a hydraulic circuit diagram. Symbol explanation (ia) (Ib)...Travel axle (2)...
...Traveling transmission aI...Hydrostatic transmission
Pump α9 for υ...Motor patent applicant Takashi Hayashi f, -""', patent attorney representing Iseki Agricultural Machinery Co., Ltd. ;,j Hee・,2''

Claims (1)

[Claims] The pump of the hydrostatic transmission is positioned substantially above and close to the traction transmission for driving the traction axle, and the motor of the hydrostatic transmission for driving the traction transmission is A travel transmission device for a combine harvester, characterized in that the drive transmission device is arranged so that the left and right sides of the pump are opposite to each other when viewed from the front.