JPH0861470A - Gear transmission - Google Patents

Abstract

PURPOSE: To correctly feed the lubricating oil of one kind to a gear engagement part and a bearing of a low speed stage and a high speed stage where the transmission ratio is large and the required viscosity of the lubricating oil is different, to miniaturize a transmission and a lubricating oil feeding device, and to reduce the cost. CONSTITUTION: In a gear transmission provided with a case where the transmission ratio is large, the gear set of the low speed stage where the required viscosity of the lubricating oil is high and the gear set of the high speed stage where the required viscosity of the lubricating oil is low are provided, and components of each gear set are internally provided and a lubricating oil feeding device to feed the lubricating oil to the gear engagement part of each gear set and a bearing to support the shaft of the gear, the gear sets of the low speed stage and the high speed stage are stored in the same case. The lubricating oil 9a of high viscosity is used so as to achieve the common use of the lubricating oil 9a and the lubricating oil feeding device, and the lubricating oil 9a of high viscosity passing through a cooler 13a provided in a lubricating oil feeding piping 11a is directly fed to the low speed stage while the lubricating oil 9a of low viscosity part of which is heated by a heater 15 is fed to the high speed stage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear transmission having a large gear ratio and a low speed stage having a high required lubricating oil viscosity and a high speed stage having a low required lubricating oil viscosity, and is particularly required for one type of lubricating oil. The present invention relates to a gear transmission suitable for accurately supplying oil to a gear meshing portion and a bearing of a low speed stage and a high speed stage having different lubricating oil viscosities, and for downsizing and cost reduction.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional gear transmission that requires a large gear ratio.

Large gear ratio shown in FIG. 5 (normally 20 or more)
In conventional gear transmissions that require
00 rpm or more) and low speed (usually less than 3000 rpm)
Gearbox (each of the lower case 7
c and the lower case 7b), and an oil supply device for supplying lubricating oil to the gear meshing portion and the bearing is separately provided. For example, for the meshing portions of the high speed gears 2a and 2b and the bearings 6a to 6c, the oil supply pipe 1 from the oil tank 8c.
Low viscosity lubricating oil 9b by oil pump 10c through 1c
Is sucked up, and oil is supplied through the high speed stage oil supply pipe 14b through the filter 12c and the cooler 13c. High-viscosity lubricating oil 9a is sucked up by the oil pump 10b from the oil tank 8b through the oil supply pipe 11b to the meshing portions of the low speed gears 1a to 1f and the bearings 5a to 5h, and the low speed is passed through the filter 12b and the cooler 13b. Level oil supply pipe 14
It is refueled through a. This is because the required viscosity of the lubricating oil is different between the high-speed stage and the low-speed stage. For example, the high-speed stage uses low-viscosity ISO VG68 oil and the low-speed stage uses high-viscosity ISO VG220 oil. Because they cannot be united.

As a conventional technique related to this type of gear transmission, there is, for example, the technique described in Japanese Patent Application Laid-Open No. 2-245523.

[0005]

In the above-mentioned prior art, since the high-speed stage and the low-speed stage use different lubricating oils, respectively, the gear case cannot be integrated, so that the gear transmission itself and the oil supply device are not integrated. There is a problem that the size is inevitable, the installation area is large, and the cost is high.

An object of the present invention is to improve the problems of the prior art as described above, and to provide a gear meshing portion and a bearing for a low speed stage and a high speed stage having a large gear ratio and different required lubricating oil viscosities.
An object of the present invention is to provide a gear transmission that can be accurately lubricated using various types of lubricating oil, and that can reduce the size of the transmission itself and the lubrication device and reduce the cost.

[0007]

Means for Solving the Problems The above-mentioned object is to store a gear pair of a low speed stage and a high speed stage of a gear transmission in the same case, and to make a temperature difference in lubricating oil, so that the low speed stage has a low viscosity. By supplying high lubricating oil and high-speed lubricating oil with high viscosity at low temperature,
Achieved.

Further, the object is to house the gear pairs of the low speed stage and the high speed stage in the same case, use a high viscosity oil as the lubricating oil, and share the lubricating oil and the oil supply device, It is achieved by directly supplying a high lubricating oil, heating a part of the lubricating oil by a heater in the high speed stage, and supplying a low viscosity lubricating oil.

Further, the object is to house the gear pairs of the low speed stage and the high speed stage in the same case, use oil of low viscosity as lubricating oil, and share the lubricating oil and the oil supply device, and supply oil to the high speed stage. Lubricating oil with low viscosity is directly supplied through a cooler installed in the pipe, and a part of the lubricating oil is further cooled in the low speed stage by a specially equipped cooler and supplied as highly viscous lubricating oil. This is achieved by making it possible.

Further, the object is to house a pair of low speed gears and high speed gears in the same case, and divide the oil tank of the oil supply device as lubricating oil into a main tank and a sub tank by a partition plate having a passage. However, a high-viscosity oil is used as the lubricating oil, the high-viscosity lubricating oil is directly supplied to the low-speed stage, and the low-viscosity lubricating oil heated by the heater provided in the sub-tank is supplied to the high-speed stage. This is achieved by the fact that it can be supplied.

Further, the object is to house a pair of gears of low speed and high speed in the same case, and divide the oil tank of the oil supply device as lubricating oil into a main tank and a sub tank by a partition plate having a passage. However, low-viscosity oil is used as the lubricating oil, low-viscosity lubricating oil is supplied from the main tank to the high-speed stage through the cooler provided in the oil supply pipe, and specially provided in the sub-tank at the low-speed stage. This is achieved by the configuration in which it is possible to supply the high-viscosity lubricating oil further cooled by the provided cooler.

[0012]

In the present invention, the lubricating oil is provided with a temperature difference, the low-viscosity lubricating oil having a low viscosity is supplied to the low-speed stage, and the high-temperature low-viscosity lubricating oil is supplied to the high-speed stage. As a result, the lubricating oil having the required lubricating oil viscosity can be accurately supplied to the low speed and high speed gear meshing portions and the bearing. Further, in the present invention, since the low speed gear pair and the high speed gear pair are housed in the same case, it is possible to reduce the size of the entire gear transmission.

Further, in the present invention, an oil having a high viscosity is used as a lubricating oil, the lubricating oil and the oil supply device are shared, the lubricating oil having a high viscosity is directly supplied to the low speed stage, and the lubricating oil is supplied to the high speed stage. Since a low-viscosity lubricating oil is supplied by heating a part of the oil with a heater, it is possible to accurately supply the low-speed and high-speed gear engagement parts and bearings with one type of lubricating oil. . Further, since the gear pairs for the low speed stage and the high speed stage are housed in the same case, the transmission itself can be downsized, and since the low speed stage and the high speed stage share the oil supply device, Not only can the size of the device be reduced, but also the cost can be reduced.

In the present invention, low-viscosity oil is used as the lubricating oil, the lubricating oil and the oil supply device are shared, and the lubricating oil is directly supplied to the high speed stage through the cooler provided in the oil supply pipe. Since a low-speed stage is supplied with a high-viscosity lubricating oil by cooling a part of the lubricating oil with a specially provided cooler, a low-speed stage and a high-speed stage are used with one kind of lubricating oil. It is possible to precisely supply oil to the gear meshing portion and the bearing. Also in this invention, since the low speed gear pair and the high speed gear pair are housed in the same case,
The transmission itself can be downsized, and the low-speed gear and the high-speed gear share the refueling device, so that the refueling device can be downsized and the cost can be reduced.

Further, in the present invention, oil having a high viscosity is used as the lubricating oil, and the oil is supplied from the main tank of the main tank and the sub-tank divided by the partition plate having the passage in the oil tank of the oil supply device at the low speed stage. The high-viscosity lubricating oil cooled through the cooler provided in the pipe is directly supplied, and the low-viscosity lubricating oil heated by the special heater provided in the sub tank is supplied to the high speed stage. Therefore, also in the present invention, it is possible to precisely supply the low-speed and high-speed gear meshing portions and the bearings with one type of lubricating oil. Furthermore, since the low-speed gear and the high-speed gear are housed in the same case, the transmission itself can be downsized, and the low-speed gear and the high-speed gear can be used for the oil tank of the lubricator.
A partition plate having a passage can be shared by dividing it into a main tank and a sub tank, and the return pipe for the lubricating oil can be shared as it is. Therefore, it is possible to reduce the size of the oil supply device and to reduce the cost. You can also

Further, in the present invention, oil having a low viscosity is used as the lubricating oil, and in the high speed stage, the oil is supplied from the main tank of the main tank and the sub tank which are partitioned by the partition plate having the passage in the oil tank of the oil supply device. Low viscosity lubricating oil is directly supplied through a cooler provided in the pipe, and high viscosity lubricating oil further cooled by a cooler specially installed in the sub tank is supplied to the low speed stage. Therefore, also in the present invention, it is possible to precisely supply the low-speed and high-speed gear meshing portions and the bearings with one type of lubricating oil. Moreover, since the low-speed gear and the high-speed gear are housed in the same case, the transmission itself can be downsized, and in the present invention, the low-speed gear and the high-speed gear are connected to the oil tank of the oil supply device through the passage. Since it can be shared by dividing it into a main tank and a sub-tank by a partition plate that has, and the return pipe of the lubricating oil can be shared as it is, it is possible to reduce the size of the oil supply device and to reduce the cost. You can also

[0017]

FIG. 1 shows the first embodiment of the present invention.
It is a figure which shows the plane of the gear transmission and the system of an oil supply device in the state which removed the upper case.

The first embodiment shown in FIG. 1 has a structure in which the speed is changed by four pairs of gears.
a and 2b are high speed gears, low speed gear pairs 1a and 1b,
The gears 1c, 1d, 1e, 1f are low speed gears.
The high speed gear 2a is fixed to a high speed shaft 4a, and the high speed shaft 4a is supported by high speed bearings 6a and 6b. The low speed gears 1a, 1b, 1c, 1d,
1e, the low speed gear 1f and the high speed gear 2b are fixed to the low speed shafts 3a, 3b, 3c and 3d respectively, and the low speed shafts 3a, 3b, 3c and 3d are respectively the low speed bearings 5a and 5d.
It is supported by b, 5c, 5d, 5e, 5f, 5g, and 5h. These low speed gears 1a to 1f and the low speed shaft 3a
˜3d, bearings 5a to 5h, and high speed gears 2a, 2
b, the high speed shaft 4a, and the bearings 6a and 6b are all in the lower case 7a.
The lower case 7a is covered with an upper case (not shown) and stopped to form a gear transmission.

A drive machine such as a turbine (not shown) is connected to the high speed shaft 4a via a coupling 17, and a low speed shaft 3a is connected to a mill (not shown) via a coupling 18. ) Etc. is connected to the follower.

An oil supply device is connected to the transmission. This oil supply device includes an oil tank 8a, lubricating oil 9a stored therein, an oil supply pipe 11a, and an oil supply pipe 11a.
low-speed stage oil supply pipe 14 branched from a and supplying lubricating oil 9a to the meshing portions of the gears 1a to 1f and the bearings 5a to 5h.
a and a gear 2a branched from the oil supply pipe 11a,
High speed stage oil supply pipe 14b for supplying lubricating oil 9a to the meshing portion of 2b and bearings 6a, 6b, case and oil tank 8
and a lubricating oil return pipe 16a provided between a and a.

In this embodiment, as the lubricating oil 9a, a highly viscous oil such as gear oil ISO VG220 is used.

The oil supply pipe 11a is provided with an oil pump 10a for pumping the lubricating oil 9a from the oil tank 8a, a filter 12a for removing foreign matters, and a cooler 13a for suppressing a temperature rise of the lubricating oil 9a in series. There is.

From the low speed stage oil supply pipe 14a, the highly viscous lubricating oil 9a passed through the cooler 13a is directly supplied to the meshing portions of the gears 1a to 1f and the bearings 5a to 5h.

The heater 1 is attached to the high-speed stage oil supply pipe 14b.
5 are provided, and from the high speed stage oil supply pipe 14b to the meshing portions of the gears 2a and 2b and the bearings 6a and 6b,
A part of the lubricating oil 9a is heated by the heater 15 to supply the lubricating oil having a low viscosity.

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

When the gear transmission according to the first embodiment is used as, for example, a speed reducer, high speed rotation of a turbine (not shown) on the input side is transmitted through the coupling 17 to the high speed shaft 4.
a is transmitted to a mill (not shown) on the output side through the coupling 18 from the low speed shaft 3a, and is decelerated by the high speed gears 2a and 2b and the low speed gears 1f to 1a. I do the work.

At this time, the oil tank 8a to the oil pump 10
Lubricating oil 9a having a high viscosity through the oil supply pipe 11a by a
Is sucked up, foreign matters are removed by the filter 12a, cooled by the cooler 13a, and high-viscosity lubricating oil 9a is directly supplied to the low speed gear engagement portion and the bearings 5a to 5h through the low speed oil supply pipe 14a. In addition, the high-speed gear meshing portion and the bearings 6a, 6b include oil supply pipes 11a.
The low-viscosity lubricating oil 9a heated by the heater 15 provided in the middle of the high speed stage oil supply pipe 14b is supplied from.

Then, the lubricating oil 9a supplied to each gear meshing portion and bearing is accumulated in the case and then returned to the oil tank 8a through the return pipe 16a.

As described above, according to the first embodiment, oil having a high viscosity is used as the lubricating oil, the oil supply pipe is branched in the middle, and the low speed gear engagement portion and the bearings 5a to 5h are cooled. The high-viscosity lubricating oil 9a that has been cooled by the vessel 13a is supplied, and the high-speed gear meshing portion and the bearings 6a and 6b are heated by the heater 15 to supply the low-viscosity lubricating oil 9a. The low speed stage and the high speed stage having different required lubricating oil viscosities can be housed in a single case, and the oil supply device can be shared. As a result, even a gear transmission having a large gear ratio can be downsized and the cost can be reduced.

Next, FIG. 2 shows a second embodiment of the present invention, and is a view showing the plane of the gear transmission and the system of the oil supply device with the upper case removed.

In the second embodiment shown in FIG. 2, a lubricating oil 9b having a low viscosity is used as the lubricating oil. Further, a cooler 19 is provided in the low speed gear oil supply pipe 14a for supplying oil to the low speed gear engagement portion and the bearings 5a to 5h, and for the high speed gear oil supply pipe 14a and high speed stage oil supply to the bearings 6a and 6b. Nothing is provided in the oil supply pipe 14b, and the low-viscosity lubricating oil 9b is directly supplied.

Regarding the other structure of the second embodiment,
This is the same as the first embodiment.

In the second embodiment, the oil supply pipe 11 is supplied from the oil tank 8a of the oil supply device by the oil pump 10a.
After the low-viscosity lubricating oil 9b is sucked up through a, the foreign matter is removed by the filter 12a, and the cooling is performed by the cooler 13a provided in the oil supply pipe 11a, the high speed gear engagement portion and the bearings 6a, 6b are fastened to each other. Stepped oil supply pipe 14b
The low-viscosity lubricating oil 9b is directly supplied through the low-speed lubricating oil pipe 1 to the low-speed gear meshing portion and the bearings 5a to 5h.
The high-viscosity lubricating oil 9b further cooled by the cooler 19 provided in 4a is supplied.

As a result, also in the second embodiment,
The low speed stage and the high speed stage having different required lubricating oil viscosities can be housed in a single case, and the oil supply device can be shared. Therefore, even a gear transmission having a large gear ratio can be downsized and the cost can be reduced.

Regarding the other operation of the second embodiment,
This is the same as the first embodiment.

Next, FIG. 3 shows a third embodiment of the present invention and is a system diagram of an oil supply device.

In the third embodiment shown in FIG. 3, the oil tank 20 of the oil supply device is divided into a main tank 20a and a sub tank 20b by a partition plate 21 having a passage 21a. Further, the oil tank 20 has a high-viscosity lubricating oil 9a.
Has been injected.

In the main tank 20a, a set of an oil supply pipe 11a and a low speed stage oil supply pipe 14a for supplying lubricating oil 9a to a gear engagement portion and a bearing (neither shown) of the low speed stage, and a case (not shown). The return pipe 16a for returning the lubricating oil 9a from (1) is connected. In the oil supply pipe 11a,
The oil pump 10a, the filter 12a, and the cooler 13a are provided.

A heater 22 is provided in the sub tank 20b, and an oil supply pipe 11 for supplying a lubricating oil 9a to a gear meshing portion and a bearing (both not shown) at a high speed stage.
A set of c and the high speed stage oil supply pipe 14b is connected. The oil supply pipe 11c includes an oil pump 10c and a filter 12c.
Is provided.

Therefore, the high-viscosity lubricating oil 9 in the main tank 20a is used for the low-speed gear meshing portion and the low-speed shaft bearing.
The oil a is sucked up by the oil pump 10a through the oil supply pipe 11a, foreign matters are removed by the filter 12a, and cooled by the cooler 13a, and then the high-viscosity lubricating oil 9a is directly supplied through the oil supply pipe 14a for the low speed stage.

On the other hand, a part of the high-viscosity lubricating oil 9a in the main tank 20a enters the sub-tank 20b through the passage 21a provided in the partition plate 21, and is heated by the heater 22 provided in the sub-tank 20b. Be heated. Therefore, the low-viscosity lubricating oil 9a heated by the heater 22 in the sub-tank 20b is sucked up by the oil pump 10c through the oil supply pipe 11c, and foreign matter is absorbed by the filter 12c in the gear meshing portion of the high speed stage and the bearing of the high speed shaft. After being removed, the low-viscosity lubricating oil 9 is passed through the high speed stage oil supply pipe 14b.
a is supplied.

The lubricating oil 9a supplied to the gear meshing portions of the low speed gear and the high speed gear and the bearing is stored in a case (not shown) and then returned to the main tank 20a through the return pipe 16a.

As described above, also in the third embodiment, the lubricating oil 9a can be accurately supplied to the low speed stage and the high speed stage having different required lubricating oil viscosities by the single oil supply device. Along with this, even for a gear transmission having a large gear ratio, the low speed stage and the high speed stage can be housed together in a single case, so the transmission can be downsized and the cost can be reduced. Can be planned. Moreover, since the oil tank 20 of the oil supply device and the return pipe 16a for the lubricating oil 9a can be shared, the oil supply device can be simplified and downsized accordingly.
In addition, it is possible to reduce costs.

Further, FIG. 4 shows a fourth embodiment of the present invention and is a system diagram of an oil supply device.

In the fourth embodiment shown in FIG. 4, the inside of the oil tank 20 is divided into a main tank 20a and a sub tank 20b by a partition plate 21 having a passage 21b. Further, a low-viscosity lubricating oil 9b is injected into the oil tank 20.

A cooler 23 is provided in the sub tank 20b.

The main tank 20a has an oil supply pipe 11c.
And the set of the high speed stage oil supply pipe 14b and the return pipe 16a for the lubricating oil 9b are connected. In the oil supply pipe 11c,
The oil pump 10c, the filter 12c, and the cooler 13c are provided in series.

On the other hand, the oil supply pipe 1 is provided in the sub tank 20b.
A set of 1a and the low speed stage oil supply pipe 14a is connected. An oil pump 10a and a filter 1 are provided in the oil supply pipe 11a.
2a and the cooler 13a are provided in series.

In the fourth embodiment, the low-viscosity lubricating oil 9b is supplied from the main tank 20a to the high-speed gear meshing portion and the high-speed shaft bearing (both not shown) through the oil supply pipe 11c. After being sucked up by 10c, foreign matters are removed by the filter 12c, and the temperature rise is suppressed by the cooler 13c, the low-viscosity lubricating oil 9b is directly supplied through the high-speed stage oil supply pipe 14b.

Further, a part of the low-viscosity lubricating oil 9b in the main tank 20a enters the sub tank 20b through the passage 21b provided in the partition plate 21, and the cooler 23 provided in the sub tank 20b. Is cooled and becomes a high-viscosity lubricating oil 9b. Thus, the high-viscosity lubricating oil 9b cooled by the cooler 23 in the sub-tank 20b is sucked up by the oil pump 10a through the oil supply pipe 11a into the low speed gear engagement portion and the low speed shaft bearing, and the filter After the foreign matter is removed by 12a and the temperature rise is suppressed by the other cooler 13a, the high-viscosity lubricating oil 9b is supplied through the low speed stage oil supply pipe 14a.

Further, the lubricating oil 9b supplied to the gear meshing portion and the bearing of each of the low speed stage and the high speed stage is temporarily stored in the case (not shown), and then the return pipe 16 is provided.
It is returned to the main tank 20a through a.

Therefore, also in the fourth embodiment, it is possible to supply oil to the low speed stage and the high speed stage having different required lubricating oil viscosities by a single oil supply device. Along with this, even for a gear transmission having a large gear ratio, the low speed stage and the high speed stage can be housed together in a single case, so the transmission can be downsized and the cost can be reduced. Can be planned. Further, since the oil tank 20 of the oil supply device and the return pipe 16a for the lubricating oil 9b can be shared, the oil supply device can be simplified correspondingly and the cost can be reduced.

[0053]

According to the invention described in claim 1 of the present invention described above, the lubricating oil is provided with a temperature difference, the low-viscosity lubricating oil is supplied to the low speed stage, and the high temperature stage is supplied with the high viscosity. Since it is configured to be able to supply low-viscosity lubricating oil, it has the effect of being able to accurately supply the lubricating oil with the required lubricating oil viscosity to the low-speed and high-speed gear meshing parts and bearings respectively. Since the gear pairs of stages are housed in the same case,
There is also an effect that the entire gear transmission can be downsized, and thus the installation area can be reduced.

According to the second aspect of the present invention, a highly viscous oil is used as the lubricating oil, the lubricating oil and the oil supply device are shared, and the highly viscous lubricating oil is directly used in the low speed stage. It supplies the high-speed stage with a low-viscosity lubricating oil obtained by heating a part of the lubricating oil with a heater.
There is an effect that it is possible to accurately supply the gear meshing portion and the bearing of the low speed stage and the high speed stage using one type of lubricating oil, and since the low speed stage and the high speed stage gear pair are housed in the same case, The transmission itself can be downsized, and since the low-speed stage and the high-speed stage share the refueling device, it is possible to reduce the size of the refueling device, thus reducing the installation area. There is also an effect that the cost can be reduced.

According to the third aspect of the present invention, oil having a low viscosity is used as the lubricating oil, the lubricating oil and the oil supply device are shared, and the cooling provided in the oil supply pipe at the high speed stage. Since the low-viscosity lubricating oil that has passed through the vessel is directly supplied, and the low-velocity lubricating oil that has been further cooled by a specially provided cooler is supplied to the low-speed stage, There is an effect that it is possible to precisely supply the gear meshing portions and the bearings of the low speed stage and the high speed stage by using one type of lubricating oil, and in the present invention as well, the gear pairs of the low speed stage and the high speed stage are provided in the same case. Since it is installed, the transmission itself can be downsized, and since the low-speed and high-speed gears share the refueling device, the refueling device can be downsized, and therefore the installation area is small. In addition to having the effect of Effect to obtain aim to down also.

According to the fourth aspect of the present invention, a high-viscosity oil is used as the lubricating oil, and the low-speed stage has a main tank partitioned by a partition plate having a passage in the oil tank of the oil supply device. Lubricating oil with high viscosity, which is cooled from the main tank through a cooler provided in the oil supply pipe, is directly supplied from the sub-tank, and low-viscosity lubricating oil is heated by a heater provided in the sub-tank in the high speed stage. Since the oil is supplied, there is an effect that it is possible to accurately supply the gear meshing portion and the bearing of the low speed stage and the high speed stage with one type of lubricating oil, and the low speed stage and the high speed stage are the same case. Since it is housed inside, the size of the transmission itself can be reduced, and the oil tank of the oil supply device can be divided into a main tank and a sub tank by a partition plate with passages at the low speed stage and the high speed stage. By sharing , The lubricating oil return piping can be directly shared, that amount lubricator miniaturization can be achieved, and therefore outside, the effect of obtaining achieving cost reduction has the effect of requiring a small installation area.

Further, according to the invention of claim 5 of the present invention, an oil having a low viscosity is used as a lubricating oil, and a high-speed stage has a main tank partitioned by a partition plate having a passage in an oil tank of an oil supply device. Of the sub-tank, the low-viscosity lubricating oil is directly supplied from the main tank through the cooler provided in the oil supply pipe, and the low-velocity lubricating oil is further cooled by the cooler provided in the sub-tank. Since high lubricating oil is supplied, the present invention also has the effect of accurately supplying the gear meshing portion and the bearing of the low speed stage and the high speed stage with one type of lubricating oil. Since the high speed gear and the high speed gear are housed in the same case, it is possible to reduce the size of the transmission itself, and the oil tanks of the lubricator at the low speed gear and the high speed gear are separated from each other by a partition plate having a passage. Tank and Since it can be divided and shared, and the return pipe of the lubricating oil can be shared as it is, it is possible to reduce the size of the oil supply device accordingly. Therefore, the present invention also has the effect that the installation area can be small, and the cost can be reduced. There is also an effect that can be achieved.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention, and is a diagram showing a plane of a gear transmission and a system of an oil supply device with an upper case removed.

FIG. 2 shows a second embodiment of the present invention and is a diagram showing a plane of the gear transmission and a system of an oil supply device with an upper case removed.

FIG. 3 shows a third embodiment of the present invention and is a system diagram of an oil supply device.

FIG. 4 illustrates a fourth embodiment of the present invention and is a system diagram of an oil supply device.

FIG. 5 is a diagram showing a conventional technique.

[Explanation of symbols]

1a to 1f ... Gears on the low speed stage side, 2a, 2b ... Gears on the high speed stage side, 3a to 3d ... Low speed shaft, 4a ... High speed shaft, 5a to 5h
... low-speed shaft bearings, 6a, 6b ... high-speed shaft bearings, 7a ... lower case, 8a ... oil tank, 9a ... high-viscosity lubricating oil, 9b
... Low viscosity lubricating oil, 10a, 10c ... Oil pump, 11
a, 11c ... Oil supply piping, 12a, 12c ... Filter, 1
3a ... Lubricating oil cooler, 14a ... Low speed oil pipe, 14
b ... High speed stage oil supply pipe, 15 ... Lubricating oil heater, 16a ...
Lubricating oil return pipe, 19 ... Lubricating oil cooler, 20 ... Oil tank, 20a ... Main tank, 20b ... Sub tank, 21 ... Partition plates, 21a, 21b ... Lubricating oil passage, 22 ... Lubricating oil heater, 23 ... Lubricating oil cooler.

Claims (5)

[Claims] 1. A low-speed gear pair having a high gear ratio and a high required lubricating oil viscosity, and a high-speed gear pair having a low required lubricating oil viscosity, and the constituent members of each gear pair are internally provided. In a gear transmission having a case and a lubrication device that lubricates and lubricates a gear meshing portion of each gear pair and a shaft of the gear, the low speed gear pair and the high speed gear pair are housed in the same case. At the same time, by making a temperature difference in the lubricating oil, it is possible to supply low-viscosity lubricating oil at low temperature to low-speed stages and high-viscosity lubricating oil at high temperature to low-speed stages. transmission. 2. A gear pair of a low speed stage having a large gear ratio and a high required lubricating oil viscosity and a gear pair of a high speed stage having a low required lubricating oil viscosity, and the constituent members of each gear pair are internally provided. In a gear transmission having a case and a lubrication device that lubricates and lubricates a gear meshing portion of each gear pair and a shaft of the gear, the low speed gear pair and the high speed gear pair are housed in the same case. At the same time, a high-viscosity oil is used as the lubricating oil, the lubricating oil and the oil supply device are shared, the high-viscosity lubricating oil is directly supplied to the low speed stage, and a part of the lubricating oil is supplied to the high speed stage by a heater. A gear transmission characterized in that it can be heated and supplied with lubricating oil having a low viscosity. 3. A gear pair of a low speed stage having a large gear ratio and a high required lubricating oil viscosity and a gear pair of a high speed stage having a low required lubricating oil viscosity, and the constituent members of each gear pair are internally provided. In a gear transmission having a case and a lubrication device that lubricates and lubricates a gear meshing portion of each gear pair and a shaft of the gear, the low speed gear pair and the high speed gear pair are housed in the same case. At the same time, low-viscosity oil is used as the lubricating oil, the lubricating oil and the oil supply device are shared, and the low-viscosity lubricating oil is directly supplied to the high-speed stage through the cooler provided in the oil supply pipe, and the low-speed stage The gear transmission is characterized in that a part of the lubricating oil is further cooled by a specially provided cooler and can be supplied as a highly viscous lubricating oil. 4. A low-speed gear pair having a large gear ratio and a high required lubricating oil viscosity, and a high-speed gear pair having a low required lubricating oil viscosity, and the constituent members of each gear pair are internally provided. In a gear transmission having a case and a lubrication device that lubricates and lubricates a gear meshing portion of each gear pair and a shaft of the gear, the low speed gear pair and the high speed gear pair are housed in the same case. At the same time, the inside of the oil tank of the oil supply device is divided into a main tank and a sub tank by a partition plate having a passage as lubricating oil, and high-viscosity oil is used as lubricating oil. A gear transmission characterized in that lubricating oil is directly supplied and lubricating oil of low viscosity heated by a heater provided in a sub tank can be supplied to a high speed stage. 5. A low-speed gear pair having a large gear ratio and a high required lubricating oil viscosity and a high-speed gear pair having a low required lubricating oil viscosity, and the constituent members of each gear pair are internally provided. In a gear transmission having a case and a lubrication device that lubricates and lubricates a gear meshing portion of each gear pair and a shaft of the gear, the low speed gear pair and the high speed gear pair are housed in the same case. At the same time, the inside of the oil tank of the oil supply device is divided as a lubricating oil into a main tank and a sub tank by a partition plate having a passage, and low-viscosity oil is used as the lubricating oil. It is configured to supply low-viscosity lubricating oil through the provided cooler, and to supply further cooled high-viscosity lubricating oil to the low-speed stage by a specially provided cooler in the sub tank. And gear transmission.