JPS608659Y2 - Agricultural machinery lubrication device - Google Patents

Description

[Detailed description of the invention] The present invention has an inexpensive structure by using an existing hydraulic actuator for driving working equipment that operates in a fixed amount to supply lubricating oil to the lubricating parts of various working equipment installed on agricultural machinery. It is an object of the present invention to provide a lubricating device for agricultural machinery that can be used satisfactorily.

Conventionally, when supplying lubricating oil to the lubricating parts of various working devices installed on agricultural machinery, lubricating oil is supplied to the lubricating parts by a pump that is driven in conjunction with the vertical movement of the working device, such as the reaping feeder of a combine harvester. (for example, Japanese Utility Model Application Publication No. 127327/1983).

However, as mentioned above, such a lubrication device not only requires a dedicated pump for the lubrication device, but also requires a complicated structure for driving the device in conjunction with the operation of the work equipment. .

Therefore, a lubricating oil supply pipe is connected in the middle of the path that supplies hydraulic oil to the hydraulic actuator for driving the work equipment, and a part of the hydraulic oil is supplied as lubricating oil, and the amount of the supplied oil is adjusted by a throttle. However, if part of the hydraulic oil is supplied as lubricating oil while the working device is being driven, the driving of the working device becomes unstable.

In order to solve this problem, there is a system in which two parts of the return oil from the hydraulic actuator are supplied as lubricating oil, and the remaining part is returned to the tank (for example,
-10542 咥publication).

However, even with this kind of oil, since it supplies lubricating oil and returns the remainder to the tank at the same time,
There is a drawback that the pressure of the return oil decreases and the lubricating oil is returned to the tank without being supplied to the lubricating points located relatively high or far away in the desired amount.

The present invention aims to solve the above-mentioned problems.

Embodiments of the present invention will be described in detail below based on the drawings.

The figure shows a compine in which a reaping section 4 is connected to the front part of the machine, which consists of a crawler traveling device 1, a threshing device 2, etc., via a support frame 3 that also serves as a transmission case. It is configured to cut and process planted stem culms.

That is, the front part pulling device 5 raises the planted stem culm to an upright position, the lower end of the stump is cut by the reaping device 6, and the harvested stem culm is transferred to the ear tip locking and conveying device 7 and the protruding chain 8a. It is configured to transport the grains rearward in cooperation with a stock conveying device 8 which has clamping rails 8b arranged opposite to each other, and to deliver them to the feed chain 9 of the threshing device 2.

The threshing device 2 processes the stem culm while being held and conveyed by the feed chain 9, and is configured to send the processed waste straw to the rear waste straw cutter 10.

A single-acting hydraulic cylinder 11 is interposed between the support frame 3 and the machine, and this cylinder 11 is connected to a second
As shown in the figure, the reaping section 4 is configured to be raised and lowered as the three-position switching valve 12 is operated to expand and contract.

In other words, as pressure oil is supplied from the pump P to the cylinder 11 to force it to expand, the reaping section 4 is raised, and the cylinder 1
1 is switched to a shortened state in communication with the tank, the reaping section 4 is lowered by its own weight, and the reaping section 4 is held fixed as the switching valve 12 is put into a neutral lock state and the cylinder 11 is hydraulically locked. It is configured.

Further, a lubricating device described below is configured to supply lubricating oil to the protruding chain 8a, the reaping device 6, and the feed chain 9 in the stock clamping and conveying device 8.

That is, the oil drain side port a of the switching valve 12 is connected to the lubrication nozzle 13 provided on the protruded chain 8a, and the switching valve 1
The entire amount or at least a portion of the oil from 2 is transferred to the nozzle 13...
A two-position switching valve 16 is interposed that can be switched between a first state in which the water is returned to the tank T and a second state in which the water is returned to the tank T.

Then, as the switching valve 16 is switched to the first state, the return oil from the cylinder 11 is transferred to each nozzle 13 . It is configured to be branched and supplied to the chains 8a with protrusions.

Also, in the connection circuit between the switching valve 16 and the nozzle 13, there are throttle valves 17a, 17b, 17c having different oil flow resistances.
is interposed therebetween, and a device 8a corresponding to the nozzle 13 .

It is configured to distribute according to the required oil amount of 6.9.

Further, as shown in FIG. 3, the tank T that stores the hydraulic oil of the cylinder 11 is equipped with a float valve 18 that opens and closes the receiving port 18b by vertical movement of the floating body 18a.
When the hydraulic oil in the auxiliary tank 19 falls below a certain level, fresh oil in the auxiliary tank 19 automatically flows down and is replenished.

It should be noted that the present invention may be used to supply lubricating oil to four or more actuating devices.

In addition, when the return oil from the hydraulic actuator 11 is supplied to the actuating device in a timely manner, for example, the switching valve 16 in the embodiment
The operations may be simplified by operating them all at once in conjunction with the operations of the working device which are operated at appropriate times.

Further, as the hydraulic actuator 11, various types such as a double-acting cylinder, a constant angle hydraulic motor, etc. may be used.

The above are examples of the present invention.

As explained in this embodiment, the structural features of the present invention are that the entire amount of return oil is returned to the tank in the return oil path of the hydraulic actuator that drives the working device, and that the return oil path is A valve is interposed to switch the state in which the entire amount of oil is supplied to the lubricating oil supply path, and an oil flow resistance is installed in each of the branch paths of the lubricating oil supply path to the plurality of lubricating target devices. The main feature is that a throttle valve is installed, which is set according to the required amount of oil, and the following effects can be obtained by this configuration.

In other words, without requiring a special hydraulic actuator for supplying lubricating oil, the entire amount of return oil that is pressurized and recirculated during the shortening operation of the existing hydraulic actuator is supplied to the lubricating part by the switching valve. The pressure of the returning oil does not drop due to part of the oil returning to the tank side where there is less oil flow resistance, and a sufficient amount of oil can be maintained even in high or far positions where there is relatively little oil flow resistance. It is possible to supply lubricating oil, and a throttle valve is installed to prevent lubricating oil from being supplied in excess of the required amount to nearby low points, thereby avoiding local oversupply of lubricating oil. This allows the desired lubrication to be applied to the desired location, and since the maximum amount of oil returned from the hydraulic actuator is constant, this can be used to prevent oversupply of lubricating oil. By doing this, you will not only eliminate wasted oil, but also
This can prevent excess oil from adhering to the outside of the actuating device and staining other devices and crops.

Such wastage of oil and soiling of crops is further ensured by the action of the throttle valve, which sets the passage resistance in accordance with the amount of oil required for the lubricating device.

Moreover, when the oil is sufficiently filled, the valve can be switched so that no oil is added at all.

As described above, the synergistic effect of the use of the return oil of the existing hydraulic actuator, the provision of the switching valve, and the provision of the throttle valve in each of the branch paths allows for a simple configuration. This provides the advantage that only the required amount can be supplied to the required location at the time when lubrication is required.

[Brief explanation of the drawing]

The drawings show an embodiment of the lubricating device for agricultural machinery according to the present invention, in which Fig. 1 is a schematic side view of a combine harvester, Fig. 2 is a schematic diagram of the lubrication device, and Fig. 3 is a partially longitudinal side view showing a tank portion. be. 11... Hydraulic actuator.

Claims (1)

[Scope of Claim for Utility Model Registration] ■ A condition in which the entire amount of return oil is returned to the tank T in the return oil path of the hydraulic actuator 11 that drives the working device, and the entire amount of return oil in the return oil path is sent to the lubricating oil supply path. In addition, a valve 16 is installed to switch the lubricating oil supply path to a plurality of lubricating target devices 8.6. .9
Throttle valve 17ay 1 set according to the required oil amount
A lubricating device for agricultural machinery that uses 7bt 17c. (2) The lubricating device for agricultural machinery according to claim (2), wherein the hydraulic actuator 11 is a hydraulic cylinder for raising and lowering the working part.