JPH0219652Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a working machine that uses lubricating oil in a transmission case as hydraulic oil for a hydraulic cylinder that swings a reaping device such as a combine up and down.

In this type of conventional working machine, when supplying oil from the transmission case to the hydraulic cylinder, an outlet port on the transmission case side is provided on one side of the lower part of the transmission case, and the outlet port of the port is A strainer was installed on the inside of the transmission case, and the lubricating oil in the transmission case was filtered to a state where it could be used as hydraulic oil for the hydraulic cylinders, and then the oil was sent to the hydraulic cylinders.

However, since the strainer is located inside the transmission case and near the bottom of the case, wear particles and other inclusions generated from the gear transmission mechanism are likely to mix in the hydraulic fluid.
Alternatively, even if they are not mixed together, the strainer becomes more frequently clogged, necessitating frequent cleaning or replacement. Moreover, in order to remove the strainer, it is necessary to drain the lubricating oil, and since the strainer is located below the transmission case, it is necessary to work in a narrow space where other equipment is concentrated. There were also some maintenance problems.

The present invention has been developed in view of the above-mentioned circumstances, and it is possible to remove the lubricating oil in the transmission case from the wear powder, etc., without installing a strainer in the transmission case to remove the wear powder, etc. generated from the gear transmission mechanism, etc. The purpose of the present invention is to provide a working machine that can be used as a hydraulic fluid with the content of

In order to achieve the above object, a working machine according to the present invention includes an axle case protruding from the lower side surface of a transmission case, in which the axle is supported by the axle case via a rolling bearing, and the axle is supported by the axle case via a rolling bearing. lubricating oil in the axle case can freely flow into the axle case through the bearing, and
A port for taking out the lubricating oil in the transmission case as working hydraulic oil is provided at a part of the axle case that is further away from the bearing part with respect to the transmission case, and further, the hydraulic oil taken out from the port is It is characterized by having an oil passage that returns to the inlet port provided in the transmission case.

The effects of this characteristic configuration are as follows.

The port for taking out working hydraulic oil is provided on the axle case that protrudes from the lower side of the transmission case, rather than at the bottom of the transmission case, so it is relatively cleaner than when taking out lubricating oil as hydraulic oil from the bottom of the transmission case. Lubricating oil can be extracted as hydraulic oil. In other words, the wear particles of the gears in the transmission case are likely to settle and accumulate on the bottom of the transmission case. Since the purpose is to extract hydraulic oil from the axle case downstream of the position where the bearing is installed, it is necessary to avoid sucking in the settled gear wear particles as much as possible, and to remove the strainer from the conventional strainer. It has now become possible to supply relatively clean hydraulic oil without having to install it inside the system case.

Furthermore, even if the strainer action of the bearing is not sufficient, a new strainer can be placed above the transmission case where replacement is easy and interposed between the port and the hydraulic cylinder, reducing the frequency of replacement. The amount can be significantly reduced compared to conventional ones, which is very advantageous in terms of maintenance.

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 1, a reaping section 2 raises and reaps the planted grain culm, and while transporting the reaped grain culm to the rear of the machine, changes its posture to a sideways posture and delivers it to the feed chain 1; A threshing device 3 that threshes the harvested grain culm while holding and conveying it in the feed chain 1.
is connected to a traveling vehicle body A equipped with a crawler traveling device 4, and the reaping section 2 is provided so as to be movable up and down with respect to the traveling vehicle body A by means of a hydraulic cylinder 5 to constitute a combine harvester.

An engine E is disposed at the front end of the traveling vehicle body A, and a transmission case M is disposed in front of the engine E, in which the engine E and a pulley 6 for belt transmission are supported protrudingly from one side of the upper end. Axle cases 7, 7 are protruded from both sides of the lower part of the transmission case M, and crawler axles 8, 8, which are separated and independently configured on the left and right sides of the axle cases 7, 7, are supported by rolling bearings 9... fixed,
A transmission gear 10 is spline fitted to the transmission case M side shaft end of the axle 8, and a drive wheel 14 for the crawler traveling device 4 is spline fitted to the outer shaft end.

The one axle case 7 is provided with lubricating oil in the transmission case M at a location farther from the transmission case than the nine bearing locations near the connection location between the transmission case M and the axle case 7. A port 7A is provided for taking out the bearing 9 after passing through it. The lubricating oil taken out from this port 7A is used as hydraulic oil for the hydraulic cylinder 5. In addition, an oil path from the port 7A as a flow path for this hydraulic oil, that is, a hydraulic path 1
6 is a strainer 11 and a hydraulic pump 1
2, as well as an outgoing path leading to the single-acting hydraulic cylinder 5 via the control valve 13, and a returning path from the hydraulic cylinder 5 to the transmission case M inlet port 15 again via the control valve 13. .

The above-described items can also be used for work vehicles other than combines.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the working machine according to the present invention, and FIG. 1 is a front side view of a combine harvester, and FIG. 2 is a partially cutaway rear view showing a transmission case. M...Mission case, 7...Axle case,
7A... Port, 8... Axle, 9... Rolling bearing, 15... Inlet port, 16... Oil path.

Claims (1)

[Scope of utility model registration request] Axle case 7 is attached to the bottom side of transmission case M.
In the working machine, an axle 8 is supported by the axle case 7 via a rolling bearing 9, and lubricating oil in the transmission case M can freely flow into the axle case 7 through the bearing 9. In addition, ports 7A for taking out the lubricating oil in the transmission case M as working hydraulic oil are provided in seven locations of the axle case that are farther from the transmission case M than the nine bearing locations; A working machine characterized in that an oil passage 16 is provided for returning hydraulic oil taken out from a port 7A to an inlet port 15 provided in the transmission case M.