JPS6118312Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a centralized lubrication device that simultaneously lubricates multiple lubrication points such as chains and cutting blades in combines, etc., and in particular, a structure for lubrication of the feed chain of a threshing machine in a combined lubrication device. Regarding.

Recently, it has become difficult to lubricate combine harvesters as moving parts have been covered due to stricter safety standards.
For this reason, it is equipped with a central lubrication system. By the way, lubrication points that require significantly longer lubrication times than other lubrication points, such as the feed chain of an automatic threshing machine, require high-pressure lubricant from the nozzle in the same way as other lubrication points. However, since it is much longer than other chains, it takes more than twice the time for one rotation, and as a result, it can only be lubricated partially, resulting in insufficient lubrication and premature wear. or caused a malfunction. In addition, lubrication nozzles are installed at several locations in the feed chain to ensure sufficient lubrication, but the locations for installing lubrication nozzles in the feed chain portion of the threshing machine are extremely limited. It is difficult to install lubrication nozzles at positions that apply lubrication evenly over the entire length of the chain, and the more nozzles are installed, the longer the piping becomes, which increases costs.

Therefore, the present invention provides a sub-tank in the pipe leading to the part of the chain that requires long-term lubrication among the many lubrication points, and also opens the end of the pipe so that lubricating oil drips onto the chain. It is an object of the present invention to provide a centralized lubrication device, particularly a centralized lubrication device for a combine harvester, which has the above-mentioned structure and eliminates the above-mentioned drawbacks.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the combine 1 consists of a traveling section 2, an automatic threshing machine 3, a pre-processing section 4, a driver's seat 5, etc., and has a large number of lubricating points, such as a plowing chain 6, cutting blades 7, grain A central lubrication device 11 is provided to lubricate the culm conveyance chain 9, the feed chain 10 of the threshing machine 3, and the like. Centralized lubrication device 11
is the oil tank 12 attached to the pre-treatment section frame.
and a lubrication pump 13 with an electric motor, nozzles 15 installed at numerous lubrication points... and a vinyl pipe 16 that communicates these. It is activated by switch 17.

Furthermore, as shown in FIG. 2, a check valve 19 is interposed in a pipe 16a that lubricates a portion of the feed chain 10 that requires longer lubrication than other lubrication points, for example. Furthermore, a branching joint 20 is interposed that can distribute in two directions. And, the distribution pipe 20 facing upward of the branch joint 20
A sub-tank 21 of a predetermined capacity is connected to a, and a pipe 16b is connected to a distribution pipe 20b extending laterally. Further, a float 22 is built into the sub-tank 21 so that it can float freely, and a limit switch 23 is installed on the lid 21a of the tank 21. Further, the switch 23 has a pin 23a that penetrates the upper lid 21a and projects downward, and when the pin 23a comes into contact with the raised float 22, the switch 23 is opened. The switch 23 is connected in series to the push button switch 17 of the central lubrication system 11, and further connected to the electric motor 13a of the lubrication pump 13 via a battery 25. On the other hand, the feed chain 10 has a floating sprocket 2 on the inlet side that tightens the chain.
6. The sprocket 26 has C pin 2
The shaft 29 is held by a bracket 7 to prevent it from coming off, and the shaft 29 is rotatably supported by a bracket 31 by two bearings 30. An oil supply pipe 32 communicating with the pipe 16b is brazed to the bracket 31, and a hole 29a passing through in the diametrical direction between the two bearings 30 is formed in the shaft 29. A communication hole 29b that intersects with the hole 29a, passes through the shaft 29 in the length direction, and is open at both ends of the shaft 29 is bored. Note that the amount that can be discharged from both end openings of the communication hole 29b is set to be smaller than the flow rate flowing through the pipe 16a, that is, the relationship is set such that the hole diameter of the communication hole 29b x 2<the hole diameter of the pipe 16a.

Since this embodiment has the above configuration, in order to operate the centralized lubrication device 11, each lubrication point,
That is, the push button switch 17 is pressed while the threshing machine 3 and the preprocessing section 4 are in operation. Then, in this state, the sub-tank 21 is empty and the limit switch 23 is closed, so the electric motor 113a of the pump 13 is driven, and the lubricating oil in the oil tank 12 is supplied to each nozzle 15 through the pipe 16. Spray from the lubrication point and lubricate each lubrication point. At this time, the oil pressure-fed to the pipe 16a leading to the feed chain 10 section is sent to the sub-tank 21 via the check valve 19 and the branch joint 20.
The oil is sent to the shaft 29 of the floating sprocket 26 through the pipe 16b and the oil supply pipe 32, and is partially chained to the bearing 30, and then through the openings at both ends of the shaft 29 through the hole 29a and the communication hole 29b of the shaft 29. Drop the feed chain 10 as shown in
Lubricate. On the other hand, the oil sent to the sub-tank 21 pushes up the float 22, and as shown in FIG. do. Then, the drive of the electric motor-equipped oil pump 13 is stopped, the injection of oil from each nozzle 15 is stopped, and the pump 1 is stopped.
The operator can immediately notice that the rotation of the button 3 has stopped because the sound is no longer audible, and the operator releases the push button switch 17. However, the central lubrication device 11
Even after the operation of the feed chain 10 is stopped,
A predetermined amount of oil in the sub-tank 21 located above is sent to the floating sprocket 26 via the pipes 16b and 32, drips from the communication hole 29b of the shaft 29, and the long feed chain 10 rotates several times. Apply oil at intervals to ensure that the entire chain 10 is thoroughly coated with oil.

In addition, although the communicating hole 29b was bored in the shaft 29,
This may be a groove, and the sub-tank 21 does not have to be installed by branching off at the branch joint 20, but directly into the pipe 16.
All the lubricating oil sent to the chain 10 may be passed through the sub-tank 21 via the sub-tank 21 via the sub-tank 21.

As explained above, according to the present invention, the sub-tank 2 is installed in the chain part that requires long-term lubrication.
1, it is possible to ensure a sufficient amount of lubricating oil, and since the lubricating oil is dripped onto the chain 10 from the opening at the end of the pipe, the lubricating oil can be lubricated slowly over time, and the entire chain 10 is sufficiently and evenly coated. Can be lubricated. Also, even with a long chain 10, the lubricating part is 1.
Since only one location is required, the piping is short, the structure is simple, it can be manufactured at low cost, and maintenance is easy. Furthermore, since the lubricating oil is applied slowly, the lubricating oil does not scatter, and it is possible to prevent wasteful use of oil, dirt on other mechanisms and covers, and adverse effects on crops due to dripping in the field. Furthermore, when the present invention is applied to the feed chain 10 of the automatic threshing machine 3 in the combine harvester 1, it is only necessary to install an oil filler port at the floating sprocket 26 part on the inlet side, which greatly simplifies the design and greatly reduces the piping. It can be made shorter and also prevents oil from adhering to the grain culm.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a centralized lubrication system for a combine harvester to which the present invention is applied, FIG. 2 is an enlarged sectional view of the main parts thereof, and FIG. 3 is a sectional view of the sub-tank in different states. 1...combine harvester, 3...automatic threshing machine, 10...
... Chain (feed chain) that requires long-term lubrication, 11 ... Centralized lubrication device, 12 ... Oil tank, 13 ... Oil pump, 15 ... Nozzle,
16, 16a, 16b...pipe, 21...subtank, 26...(idling) sprocket, 29...
...Shaft, 29b...Communication hole.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a centralized lubrication device consisting of an oil tank, an oil pump, nozzles arranged at a number of lubrication points, and pipes communicating these, among the many lubrication points, This concentrated lubrication device is structured such that a sub-tank is interposed in a pipe led to a pipe leading to a chain part that requires long-term lubrication, and the end of the pipe is opened so that lubricating oil drips onto the chain. (2) Utility model registration claim 1, in which the opening at the end of the pipe with the sub-tank interposed therebetween is configured to be smaller than the pipe, so that the flow rate discharged from the opening is smaller than the flow rate flowing through the pipe. Centralized lubrication device as described. (3) The centralized lubrication device according to claim 1, wherein the chain is a feed chain of an automatic threshing machine in a combine harvester, and the inlet side of the feed chain is a lubrication point.