JPH02158427A - Hydraulic continuously variable transmission for combine - Google Patents

Abstract

PURPOSE:To cool a hydraulic fluid efficiently as well as to aim at the stabilization of performance by piping a hydraulic pipe, connecting a hydraulic pump to a hydraulic motor being driven by this pump and transmitting both right and left travel devices, at the suction side of a fan in a thresher. CONSTITUTION:A hydraulic pump 4 being transmitted out of an engine 3 is set up at the rear side part of a thresher 2 on an undercarriage. In addition, at the front side of this thresher 2, there is provided with a hydraulic motor 6, whose rotation is controlled for continuously variable speed clockwise or counterclockwise by the hydraulic pump 4, and transmitting right and left travel devices 5 via a travel transmission mechanism. Then, a hydraulic pipe 7 connecting an interval between the hydraulic pump 4 and the hydraulic motor 6 is piped at the suction side of a fan 8 in the thresher 2 for cooling. With this constitution, during threshing operation, this fan 8 is rotated all the time and fresh air is inhaled, while a hydraulic fluid flowing in the hydraulic pipe 7 is cooled by this inhaled fresh air, whereby performance of a hydraulic continuously variable transmission is thus stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a hydraulic continuously variable transmission device for a combine harvester, and can be used for a hydraulic pipe connecting a hydraulic pump and a hydraulic motor.

Background Art and Problems to be Solved by the Invention A hydraulic continuously variable transmission device continuously variable speed controls the rotation of a hydraulic motor in forward and reverse directions by changing the discharge amount and discharge direction of hydraulic fluid discharged from a hydraulic pump. In a combine configured to transmit power from the hydraulic motor to the left and right traveling devices via a traveling transmission mechanism, if the hydraulic pump and the hydraulic motor are separated, the hydraulic pump and the hydraulic motor are separated. A hydraulic pipe will be used between the two.

In a configuration in which the prime mover is mounted on the rear side of the chassis, this hydraulic pump is transmitted from the prime mover and is constantly rotated, so it is installed near the prime mover, and the hydraulic motor is installed in a transmission case that houses the travel transmission mechanism. Since the hydraulic pump and the hydraulic motor are separated from each other, the hydraulic pipe becomes long. In such a separated type hydraulic continuously variable transmission, it is desirable to improve the cooling efficiency of the continuously variable transmission by configuring the hydraulic fluid to be cooled in the middle of the hydraulic piping.

Therefore, the present invention attempts to cool the hydraulic oil by connecting the hydraulic pipe between the hydraulic pump and the hydraulic motor so as to pass through the suction side of the winnowing fan of the threshing device located in the middle.

Means for Solving the Problems This invention provides a hydraulic pump (4) located on the rear side of a threshing device (2) on a vehicle chassis (1) and transmitted from a prime mover (3), and a hydraulic pump (4) for driving the threshing device (2). This hydraulic pump (4
), the hydraulic motor (
A configuration of a hydraulic continuously variable transmission device for a combine harvester, in which a hydraulic pipe (7) connecting the threshing device +2) is installed to be piped to the suction side of the winnowing fan (8) of the threshing device +2) for cooling. do.

Functions and effects of the invention When the hydraulic pump (4) is transmitted from the prime mover (3), the discharge amount and discharge direction of hydraulic fluid are changed through the hydraulic pipe (7), and the hydraulic motor (6) moves in the forward and reverse directions. The vehicle body travels forward and backward at continuously variable speeds, and is transmitted to the left and right traveling devices (5) via a travel transmission mechanism.

The hydraulic pump (4) is located on the rear side of the threshing device (2) on the chassis (1), and the hydraulic motor (6) is located in the front of this threshing device w (2). A hydraulic pipe (7) connects a hydraulic pump (4) and a hydraulic motor (6).
) is connected to the hydraulic motor (6) by piping from the hydraulic pump (4) through the side of the threshing device (2) to the suction side of the winnowing fan (8).

During the threshing operation, the karaki fan (8) is always rotated by transmission and sucks outside air from the suction hole, and the hydraulic pipe (7) is installed on the suction side of the fan. (7) The hydraulic oil flowing therein can be cooled, and the performance of the hydraulic continuously variable transmission can be stabilized.

Example In addition, in turning, the combine harvester uses the left and right traveling device (5)
A threshing device (2) is mounted on a chassis (1) with
has been established. (1 [ is a discharge auger that takes out the stored grains. A reaping device (11) having a scraping reel for scraping the culm is installed in the front part of the chassis (11).
) A cabin (1) containing a pilot's seat is provided in front of the grain tank (9).

At the lower front of the machine frame (+31) of the threshing device (2), there is installed a Karasaki fan (8) for wind sorting the threshed grains threshed by this threshing device (2). A suction port (tied) is opened on the side of the grain tank (9) to inhale outside air.

At the lower part of the front end of the machine frame (1), a fuel tank (19) is installed on the vehicle chassis, with the fuel tank (19) recessed inside the machine frame (1).

A traveling transmission case (1e) is provided at the front end of the chassis (1), which houses a traveling transmission mechanism for transmitting power to the left and right traveling device (5).A hydraulic pump (4) is installed on the upper side of this traveling transmission case +119. A hydraulic motor (6) whose rotation is continuously variable in forward and reverse rotation is integrally installed, and a left/right travel device (5) is controlled from this hydraulic motor (6) through a travel transmission mechanism in forward and reverse directions. It has a variable speed configuration.

The hydraulic pump (4) is mounted on the rear side of the threshing device (2) on the lower chassis (1), which has a figure 7 shape when viewed from the entire bottom of the grain tank (9). , the said chassis (
1) It is configured to be rotated by transmission from a prime mover (3) mounted on the rear side of the upper grain tank (9).

The hydraulic pump (4) and the hydraulic motor (6) are connected by two hydraulic pipes (7) arranged one above the other.

This hydraulic pipe (7) passes from the hydraulic pump (4) to the side of the threshing device (2), and runs through the intake port (1) of the Karawine fan (8).
The piping is connected to the hydraulic motor (6) through the fuel tank (1!1) through the front side of the fuel tank (1!1).

When the prime mover (3) is started, the hydraulic pump (4) is driven by transmission, and the amount and discharge direction of the hydraulic fluid discharged by the hydraulic pump (4) are changed, and the hydraulic fluid is sent to the hydraulic motor 16) via the hydraulic pipe (7). Hydraulic oil is sent to this hydraulic motor (
6) The rotation is continuously variable speed controlled in forward and reverse directions. The left and right traveling device (5) is continuously variable forward and backward from the hydraulic motor (6) via a traveling transmission mechanism in a traveling transmission case (1).

Combine operation is performed by transmitting power to the reaping device (11) and the threshing device (2). When the fan (8) rotates, outside air is sucked in from the suction port (14), so the hydraulic oil in the hydraulic pipe (7) installed in front of this suction port +141 is cooled by the cooling effect of this suction outside air. be done. In addition, this hydraulic pipe (7) allows the Karaoke fan (8) to
This can prevent large objects such as debris from being inhaled from the inlet (+41).

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, with FIG. 1 being a plan view of a combine harvester, and FIG. 2 being a front view of a portion thereof. In the figure, (1) is the chassis, (2) is the threshing device, (3) is the prime mover, (4) is the hydraulic pump, (5) is the left and right traveling device,
(6) shows a hydraulic motor, (7) shows a hydraulic pipe, and (8) shows a winnowing fan.

Claims (1)

[Claims] A hydraulic pump (4) located on the rear side of the threshing device (2) on the chassis (1) and transmitted from the prime mover (3), and a hydraulic pump (4) located in the front of the threshing device (2). The threshing device (2) is connected to a hydraulic pipe (7) that connects a hydraulic motor (6) whose rotation is controlled to be continuously variable in forward and reverse rotation to transmit the left and right traveling device (5) via a traveling transmission mechanism. A hydraulic continuously variable transmission device for a combine harvester, which is installed by piping to the suction side of the KARAKI fan (8) for cooling.