JPS5832077Y2 - Lubricating oil supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lubricating oil supply device for a device equipped with a hydraulic fluid tank and a closed lubricating oil tank for a fluid pressure drive system.

Conventionally, in order to supply the lubricating oil in the tank to various lubrication points, a special device such as an air cylinder was attached to the tank to increase the pressure inside the tank. It was expensive and uneconomical.

In view of the above points, the present invention aims to provide an economically advantageous lubricating oil supply device that can supply lubricating oil without the need for special equipment by effectively utilizing the hydraulic fluid tank for the fluid pressure drive system. purpose.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

A lifting device 1 that pulls up planted culms in the field, a reaping device 2 that reaps the raised culms, and a feed chain that transports the cut culms toward the rear and upwards of the machine while changing its posture to a nearly horizontal position. a reaping section j consisting of a rear conveyance device 4 that delivers the straw to the husks, a threshing section 6 that threshes and sorts the husks while conveying them between the feed chains 3, and a threshing section shredding the straw;
Alternatively, the waste straw processing section 7, which discharges long straw without being shredded or bundled together, is successively connected to a traveling machine base equipped with a crawler traveling device 8, so that the waste straw can be distributed in the field while traveling. The combine harvester is configured to continuously harvest and process the planted culms.

The reaping section 5 is pivotally connected to the fuselage so as to be swingable up and down about a horizontal axis X above the rear part thereof, and is connected to the fuselage frame 9.
A single-acting hydraulic cylinder 10 is interposed between the reaping unit 5 and the reaping unit 5, which uses hydraulic pressure as an example of a fluid pressure type to drive the reaping unit 5 up and down during non-work driving, such as when going over ridges, turning, or when driving on the road. In order to raise the reaping part 5 and drive safely,
During work, it is configured so that it can be lowered to a desired height and travel in a predetermined manner.

The single-acting hydraulic cylinder 10 is configured to supply pressure oil from a hydraulic oil tank T by a hydraulic pump P directly connected to the engine E, and in the middle of the process, by operating an interposed control valve (2), the hydraulic cylinder 10 is By supplying pressure oil to 10, the reaping section 5
The reaping section 5 is configured to be able to be switched to a state in which the reaping section 5 is driven upward, a state in which the flow path is closed and the raising and lowering of the reaping section 5 is stopped, and a state in which oil is allowed to drain from the hydraulic cylinder 10 and the reaping section 5 is lowered by its own weight. It is.

A closed type lubricating oil tank 12 is mounted on the upper horizontal frame 11 of the lifting device 1, and an oil chamber R is formed by dividing the inside of this tank 12 with an overflow partition wall 13. ...From each oil supply pipe 14...
Derived, reaping device 2, lifting device 1, rear conveyance device 4
, the feed chain 3, and various lubricating points such as the pivot portion of the reaping section i, etc., to supply a predetermined amount of lubricating oil.

The space S1 of the hydraulic oil tank T and the upper space S2 of the lubricating oil tank 12 are connected through a ventilation pipe 15, and a branch pipe 16 opened to the atmosphere is connected in the middle of the ventilation pipe 15. A first check valve 17 is provided in the branch pipe 16 to allow only atmospheric air intake to form an intake path R1, and
A second check valve 18 is provided on the side of the lubricating oil tank 12 from the connection point of the vent pipe 15 with the branch pipe 16 to form an exhaust path R2, which allows only the passage of the inhaled atmosphere to the lubricating oil tank 12 side. As a result, atmospheric air is sucked in through the intake passage R1 as pressurized oil is supplied to the hydraulic cylinder 10, and on the other hand, atmospheric air is supplied to the upper space S2 through the exhaust passage R2 as oil is discharged from the hydraulic cylinder 10. However, the lubricating oil tank 12 is configured to be pressurized and supplied.

Therefore, by supplying a predetermined amount of lubricating oil into the lubricating oil tank 12 at the start of work, the lubricating oil can be supplied as the reaping section is driven up and down for turning at the end of the grain culm row. It can refuel automatically.

19 in the figure is a float valve installed in each oil chamber R to prevent movement to the other oil chamber R. For example, lubricating oil in one of the oil chambers R is supplied in advance. This is to prevent the inability to pressurize other oil chambers R and ensure that all the lubricating oil in the tank 12 is supplied in the event that the oil chamber R is This is a relief valve for preventing the pressure inside the lubricating oil tank 12 from increasing more than necessary after the lubricating oil is supplied and all the float valves 19 are closed.

Fig. 3 shows another embodiment, which can be used even with a double-acting cylinder 21 where the liquid level changes little due to pressure oil supply and discharge. An accumulator 22 is installed, and when the pressure oil is supplied, the pressure oil is supplied to the cylinder 2.
1 and the accumulator 22, making it possible to increase the amount of oil flowing out compared to the amount of oil flowing into the hydraulic fluid tank T. On the other hand, when draining, oil is drained from both the accumulator 22 of the cylinder 21 into the hydraulic fluid tank T. It is configured so that the amount of oil flowing into the hydraulic fluid tank T can be larger than the amount of oil flowing out.
The structure is such that the change in the liquid level in the hydraulic fluid tank T due to the operation of the cylinder 21 becomes large.

The present invention is applicable not only to combines but also to all types of work vehicles or devices that are equipped with a hydraulic fluid tank T and a closed lubricating oil tank 12 for a hydraulic drive system.

In summary, the lubricating oil supply device according to the present invention includes an intake passage R1 provided in the hydraulic fluid tank T with a check valve 17 that only allows atmospheric air to be taken into the tank T, and only exhaust air from the tank T. At the same time, the exhaust path R2 is connected to the closed type lubricating oil tank 12, and thereby the space S1 of the hydraulic fluid tank T and the lubricating oil tank 12 are connected to each other. The lubricating oil tank 12 is connected to the upper space S2 so as to pressurize the lubricating oil tank 12 as the fluid level in the hydraulic fluid tank T changes.

In other words, by effectively utilizing the fact that the fluid level within the hydraulic fluid tank T fluctuates as hydraulic fluid is supplied and discharged from the hydraulic fluid tank T to the fluid pressure drive system, the hydraulic fluid tank T Intake path R1 each provided with check valve 17°18
By simply connecting the exhaust path R2 to the closed lubricating oil tank 12 and connecting the exhaust path R2 to the closed lubricating oil tank 12, atmospheric air is sucked in as pressure fluctuates due to changes in the liquid level, and the inhaled air is transferred to the closed lubricating oil tank 12. Exhaust the lubricating oil tank 1.
From 2 onwards, we were able to apply pressure to supply oil to the lubricating points.
It has now become possible to provide a lubricating oil supply device that is structurally simple without the need for special equipment such as an air cylinder, and is inexpensive and economically advantageous.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the lubricating oil supply device according to the present invention, in which Fig. 1 is an overall side view of a combine harvester, Fig. 2 is a lubricating oil supply system diagram, and Fig. 3 is a lubricating oil supply system of another embodiment. It is a supply system diagram. 12... Sealed lubricating oil tank, 17, 18...
...Check valve, T...Hydraulic fluid tank, R1.
...Intake path, R2...Exhaust path, Sl...
. . . Space of hydraulic fluid tank T, S2 . . . Upper space of lubricating oil tank 12.

Claims (1)

[Scope of utility model registration request] An intake path R1 provided in the hydraulic fluid tank T with a check valve 17 that only allows atmospheric air to be taken into the tank T, and an exhaust path provided with a check valve 18 that only allows exhaust from the tank T. R2 and the exhaust path R2 is connected to the closed lubricating oil tank 12, whereby the space S1 of the hydraulic fluid tank T and the upper space S2 of the lubricating oil tank 12 are connected to each other, and the hydraulic fluid is A lubricating oil supply device characterized in that it is configured to pressurize the lubricating oil tank 12 as the liquid level in the tank T changes.