JP2001146118A - Transmission of mobile agricultural machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent lubricating oil from leaking out of a transmission case even when bubbling is generated of the lubricating oil in the transmission case. SOLUTION: An oil reservoir part 54 communicating with a transmission case 22 through a connection pipe 52 is provided in the upward of the transmission case 22 storing lubricating oil. Lubricating oil in the transmission case 22 easily generates bubbling by a temperature rise according to stirring action by gear driving in the transmission case 22 particularly when an engine is cold started, but even under the circumstances like this, a generated bubble, rising in the connection pipe 52, is temporarily guided to the oil reservoir part 54, the lubricating oil is returned again into the former transmission case 22 after the bubble disappears, so as to prevent the lubricating oil from leaking out of the transmission case 22 with the bubble.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile agricultural machine such as a combine, and more particularly, to a mobile agricultural machine transmission having an oil reservoir outside a transmission case.

[0002]

2. Description of the Related Art In a mobile agricultural machine such as a combine machine, an oil tank for storing oil (lubricating oil) is formed in a transmission case, and the oil is meshed with an intermediate shaft mounted on the transmission case. A smooth driving force transmission system is formed by lubricating (cooling) gears and clutches. The volume of the oil changes due to factors such as temperature, and as a lubrication (cooling) means, not only is a gear or the like constantly immersed in oil to lubricate (cool) but also lubricate (cool) by spraying lubricating oil only to necessary parts. Since forced cooling is also possible, a gap filled with a predetermined amount of air is generally formed in the upper part of the transmission case.

[0003]

However, for example, when the engine is started, particularly at a cold start, the temperature of the oil stored in the transmission case rises due to the stirring action by the gear drive in the transmission case. When the volume of the gap portion of the transmission case is small, the generated foam may leak to the outside together with the oil from an oil supply port provided at an upper portion of the transmission case.

Conventionally, when oil is supplied to the oil tank, the pre-processing portion of the combine is raised to expose the oil port at the upper portion of the transmission case, and the oil port is opened so as to be accessible. The operation of lowering the tank and refilling it with a funnel or the like through a gap in the machine body, refilling the tank, and then raising the pretreatment section again to close the refueling port was performed, so that the refueling operation was complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to prevent leakage of lubricating oil to the outside even if lubricating oil in a transmission case foams due to gear driving. It is an object of the present invention to provide a transmission of a mobile agricultural machine that can prevent the occurrence of a problem.

[0006]

In order to achieve the above object, the invention according to claim 1 is a transmission case (22).
In the transmission (21) of the mobile agricultural machine (C) formed to store lubricating oil, an oil sump (54) communicating with the transmission case (22) is provided.

According to a second aspect of the present invention, there is provided the oil reservoir (5)
The fuel supply port (55) is formed in 4).

According to a third aspect of the present invention, a breather hose (53) for releasing air that extends between the upper space in the transmission case (22) and the oil reservoir (54) is extended. And

The invention according to claim 4 is characterized in that the fuel supply port (5
5) is arranged in the driver's seat (14).

[Operation] Based on the above-mentioned invention specifying matter, the transmission (2) of the mobile agricultural machine (C) in the present invention
1) The lubricating oil is stored in the transmission case (22), and an oil reservoir (54) communicating with the transmission case (22) is provided. (22) The temperature rises due to the stirring action by the gear drive in (22), and the lubricating oil is likely to foam, but also in this case, the generated lubricating oil foam rises and temporarily becomes the oil sump ( 54), and after the bubbles disappear, it is returned to the original mission case (22) again.
2) Leakage to the outside is prevented.

Note that the reference numerals in parentheses described above refer to the drawings, and do not limit the present invention.

[0012]

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

FIGS. 1 and 2 are a schematic side view and a plan view of a combine as a mobile agricultural machine to which the present invention is applied. In these figures, a combine C is a crawler traveling device 11 on the left and right sides of the machine. The cabin 12 is provided on the upper front side of the traveling body 10, and a driving operation unit 14 having a seat 13 is provided in the cabin 12.

On the other hand, a pre-processing unit 16 is provided at the front of the traveling machine body 10 so as to be able to move up and down so as to reap the stalks. Under the steering control by a grain stalk position detecting sensor (not shown), the traveling machine body 10 travels along the grain stalks and can perform a required cutting operation. The grain stalks mowed by the pre-processing unit 16 are:
It is conveyed to a threshing unit 17 by a feed chain 15 or the like, and is threshed and sorted by a handling cylinder (not shown). This threshing unit 17
The grain that has been threshed and sorted is lifted and transferred, and temporarily stored in the grain tank 18. When the grain tank 18 is full, it is carried out of the machine by the auger discharge tube 19.
It should be noted that the throat-exhausted straw is supplied to the exhaust straw processing unit 20 at the rear of the machine.
Is processed by

As shown in FIGS. 3 and 4, an engine (not shown) is provided on the lower right side of the driving operation unit 14 in the body traveling direction, and the power of the engine is
It is transmitted to the crawler traveling device 11, the pre-processing unit 16, and the like via the transmission 21 below the driving operation unit 14.

As shown in FIG. 5, a main shift (stepless shift) lever 3 for shifting the running speed is provided on the driving operation unit 14.
0, a multi-steering lever 31 for controlling the turning of the body and the elevation of the pre-processing unit 16, a clutch turning switch (just director) 32 disposed on the left and right of the upper surface of the multi-steering lever 31, and operation / stop of the threshing unit 17 A working machine clutch lever 33, a mowing clutch lever 34 for operating / stopping the pre-processing unit 16 and the like are arranged, respectively. The traveling machine body 10 drives each of the crawler traveling devices 11, 11 by an output of an on-board engine, and automatically moves. Run and run.

Here, the structure of the transmission 21 will be briefly described.

FIG. 6 and FIG.
FIG. 3 is a cross-sectional view showing, in an unfolded manner, the entire configuration of a driving force transmission system according to a four-mode turn specification of a clutch turning, a brake turning, a sharp turning state, and a gentle turning state, which are set therein. An oil tank 40 for storing lubricating oil is formed in the transmission case 22, and an input shaft 42 for inputting a rotational driving force of the engine and an HST 43 rotationally driven by the input shaft 42 are provided. A first intermediate shaft 44, a second intermediate shaft to a sixth intermediate shaft 45 to 49, and a seventh intermediate shaft 50 for transmitting a required rotational driving force obtained by the HST 43; A pair of left and right drive shafts 51R, 51L for respectively outputting the rotational driving force to the crawler traveling devices 11, 11 is provided.
Further, between the first intermediate shaft 44 to the seventh intermediate shaft 50, and between the seventh intermediate shaft 50 and the drive shaft 51, the meshing between the gears and the speed increase and reduction of the rotation speed by the clutch, and A driving force transmission system for forward rotation and reverse rotation in the rotation direction is provided.

According to the present invention, an oil reservoir communicating with the oil tank 40 is provided above and outside the transmission case 22.

7 and 8, a connecting pipe 52 having a large diameter extends upward from the transmission case 22, and a breather for air bleeding having a small diameter substantially parallel to the connecting pipe 52. A hose 53 extends. At the upper ends of the connection pipe 52 and the breather hose 53, a cylindrical oil reservoir 54 communicating with the oil tank 40 is provided. This oil sump 54 is provided with an oil filler 55
Is provided, and by refueling from the refueling port 55,
The oil tank 40 in the transmission case 22 can be supplied with oil, and the upper end of the breather hose 53 is inserted into the upper space of the oil reservoir 54.
The upper space in the mission case 22 and the upper space of the oil sump 54 are communicated by 3.

As is apparent from FIG. 7, the breather hose 53 extends from a relatively upper position of the transmission case 22, while the connection pipe 52 is positioned below the transmission case 22 below the breather hose 53. It is extended from. Therefore, when bubbles are generated in the lubricating oil in the transmission case 22, the bubbles rise through the connection pipe 52 and are guided to the oil reservoir 54, and the connection pipe 52
The air inside is pushed out and escapes from the fuel supply port 55. At the same time, the air in the space above the transmission case 22
The bubbles are pushed upward through the breather hose 53 as the bubbles are generated, and escape from the oil supply port 55. The oil sump 54
The lubricating oil foam guided to the above is returned to the original mission case 22 again by the connection pipe 52 after the foam disappears.

FIG. 9 shows the mounting position of the oil sump 54.
In a cover 59 provided on the left side of the clutch pedal 58 below the clutch pedal 4, the oil reservoir 54 is fixed to a cover frame 59 a by a bracket 56 and a bolt 57 projecting from the case body. For this reason, in order to supply the lubricating oil into the transmission case 22, the operation operation unit 1
By simply opening the cover 59 of No. 4, the fuel can be easily supplied from the fuel supply port 55.

Next, the operation of the present embodiment will be described.

Conventionally, particularly when the engine is started at a low temperature in winter or the like, the temperature of the lubricating oil in the transmission case 22 rises sharply due to the stirring operation by the gear drive in the transmission case 22, and the lubricating oil is reduced. Foaming may occur, and this foam may leak to the outside together with the lubricating oil from an oil supply port provided at an upper portion of the transmission case 22.
This is more remarkable as the volume of the upper space in the transmission case 22 is smaller. Therefore, if this volume is made larger, leakage of the lubricating oil containing bubbles to the outside can be avoided. However, in this case, it is necessary to increase the entire volume of the transmission case 22, and the transmission case 22 cannot be made compact.

Therefore, in the present embodiment, an oil reservoir 54 communicating with the transmission case 22 is provided above the transmission case 22 so that even if the lubricating oil in the transmission case 22 is foamed, this foam is generated. The connection pipe 5
2 to temporarily move to the oil sump 54 and return to the inside of the transmission case 22 when the bubbles disappear, so that the lubricating oil in the transmission case 22 leaks out together with the bubbles. Can be prevented. At this time,
The air in the connection pipe 52 is pushed up by the foam and rises, and the oil sump 5
4 is discharged to the atmosphere through the refueling port 55. Further, as described above, the oil sump 54 is communicated with the transmission case 22 and the lubricating oil in the transmission case 22 can be moved between the oil sump 54 and the transmission case 22 if necessary. Even if the volume of the upper space inside is reduced, it is possible to prevent the lubricating oil from leaking to the outside, thereby making it possible to make the entire transmission case 22 compact.

When the temperature of the lubricating oil rises suddenly and bubbles of the lubricating oil are generated, even if the air in the connecting pipe 52 can escape from the oil supply port 55, the transmission case 2
The air in the upper space in 2 may not escape to the atmosphere. For this reason, a breather hose 53 is extended from the upper part of the transmission case 22, and the air in the upper space inside the transmission case 22 is raised via the breather hose 53,
The oil was discharged from the oil supply port 55 of the oil reservoir 54 to the atmosphere. Since the breather hose 53 communicates between the upper space in the oil sump 54 and the upper space in the transmission case 22, after the bubbles have disappeared, the transmission case 22 is connected via the breather hose 53. The air is sent again into the upper space in the interior.

[0027]

As described above, according to the first aspect of the invention, since the oil reservoir communicating with the transmission case is provided, the lubricating oil bubbles due to the stirring action by the gear drive in the transmission case. Also, when bubbles occur, this bubble rises and is temporarily led to the oil reservoir,
Since the lubricating oil is returned to the original state, it is possible to prevent the lubricating oil from leaking out of the transmission case together with the foam. Further, the oil reservoir is communicated with the mission case, and the lubricating oil in the mission case can be temporarily moved to the oil reservoir as needed, so that the upper space in the transmission case is made as small as possible. Therefore, the mission case can be designed to be compact.

According to the second aspect of the present invention, since the oil supply port is formed in the oil reservoir, the oil supply port can be attached to a location which is easy to operate in terms of space.
It is possible to easily refuel the inside of the transmission case as compared with the conventional case where the fuel is directly supplied from the fuel supply port formed in the transmission case itself.

According to the third aspect of the present invention, the breather hose for releasing air that communicates the upper space in the transmission case with the oil sump portion is extended, so that the stirring operation by the gear drive in the transmission case is performed. When the lubricating oil containing the foam moves upward due to the rise of the oil temperature and pushes up the air in the upper space in the transmission case, the pushed-up air flows through the breather hose. As a result, the lubricating oil is temporarily led to the oil reservoir, and consequently the bubbling of the lubricating oil in the transmission case can be suppressed while effectively utilizing the upper space in the transmission case, and the oil film can be prevented from being broken.

According to the fourth aspect of the present invention, since the fuel filler is disposed in the driver's seat, the pre-processing unit is raised and lowered to form the transmission case itself in order to secure a work space as in the prior art. There is no need to open and close the refueling port, and the refueling operation into the mission case can be easily performed.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a combine to which the present invention is applied.

FIG. 2 is a plan view of the same.

FIG. 3 is a rear view of the above.

FIG. 4 is a front view of the same.

FIG. 5 is a plan view of a driving operation unit of the combine.

FIG. 6 is a developed sectional view of the transmission.

FIG. 7 is a side view of the transmission.

FIG. 8 is a front view of a state where an oil sump is provided above a transmission case.

FIG. 9 is a view taken in the direction of the arrow IX in FIG. 5;

[Explanation of symbols]

 C Combine 14 Operation unit 21 Transmission 22 Transmission case 52 Connection pipe 53 Breather hose 54 Oil reservoir 55 Oil filler

Continuation of front page (72) Inventor Toshitake Furui 667 Iida-machi, Higashi-Izumo-cho, Yatsuka-gun, Shimane 1 F term (reference) in Mitsubishi Agricultural Machinery Co., Ltd. 3D039 AA14 AA16 AA23 AB13 AD45 3J063 AA13 AB44 AC03 BA03 BA13 BB27 BB41 CA01 CD41 CD69 XD03 XD56 XE12 XF14 XG24 XG42 XG52

Claims (4)

[Claims] 1. A transmission for a mobile agricultural machine, wherein the transmission of the mobile agricultural machine is formed in a transmission case so as to store lubricating oil, wherein an oil reservoir communicating with the transmission case is provided. 2. The transmission of a mobile agricultural machine according to claim 1, wherein an oil supply port is formed in the oil reservoir. 3. The transmission for a mobile agricultural machine according to claim 1, wherein a breather hose for bleeding air extending between the upper space in the transmission case and the oil reservoir portion is extended. 4. The transmission for a mobile agricultural machine according to claim 2, wherein the fuel filler is disposed in a driver's seat.