JPH05141509A - Lubricating structure for transmission - Google Patents

Abstract

PURPOSE:To improve the lubricating performance of a transfer by providing an oil receiver for receiving a lubricating oil discharged from a valve body below the valve body and providing a lubricating oil guide passage for guiding the lubricating oil received by the oil receiver to the transfer disposed below the valve body. CONSTITUTION:A transmission 2 is provided with a valve body 4 in which various hydraulic control valves or various kinds of solenoid valves for operating them are provided therein. The valve body is covered with a valve body cover 10 connected to a transmission case 8. Below the valve body 4, a transfer 12 for distributing a power from an engine is disposed. An oil plate 38 as a tray like oil receiver whose bottom part 38a is inclined toward one side is provided above the transfer 12 and below the valve body 4. Then, a surplus pressure controlled lubricating oil is dropped from the valve body 4, received by the oil plate 38, then fed to an output shaft 26 through an oil outflow hole 40 and a lubricating oil guide passage 42, lubricates front and rear roller bearings 54, 56 and is discharged from a circulating passage 52.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubrication structure for a transmission, and particularly to effectively utilize lubricating oil from a valve body to lubricate a transfer, reduce agitation resistance, and reduce lubricating oil temperature. The present invention relates to a lubrication structure for a transmission that can suppress a rise.

[0002]

2. Description of the Related Art A vehicle is equipped with a manual or automatic transmission for converting a driving force of an internal combustion engine mounted therein into a desired state according to a running condition and taking out the driving force.

The automatic transmission is provided with a valve body having various hydraulic control valves and various solenoid valves for operating the various hydraulic control valves, and a transfer for distributing driving force to the output side. There is one. In this automatic transmission, the valve body is arranged in the upper part and attached to the vehicle body, and lubricating oil is supplied to the valve body.

Further, such a transmission is disclosed, for example, in Japanese Utility Model Publication No. 61-19232.
In this publication, a transmission case is provided with an arc-shaped oil deflection plate that covers the outer periphery of the reduction driven gear, and a valve mechanism having an oil strainer is placed close to the reduction driven gear that sandwiches the oil deflection plate. In addition to the above, the oil diverting plate is provided with a branch diverting plate that covers the sides of the oil strainer, which prevents bubbles from being sucked into the valve mechanism from the oil strainer without increasing the amount of oil, and drives the driven gear. It is possible to minimize the power loss by reducing the resistance of and to arrange the oil strainer close to the driven gear.

[0005]

However, in the conventional transmission, the lubricating oil discharged from the valve body in the upper part is dropped into the transmission case as it is, so that the lubricating oil can be effectively utilized. In addition to the above, the planetary gear and the friction element located below the valve body fall on the planetary gear, which causes agitation resistance of the lubricating oil and increases the temperature of the lubricating oil.

[0006]

Therefore, according to the present invention, in order to eliminate the above-mentioned inconvenience, a valve body in which various hydraulic control valves and various solenoid valves for operating the various hydraulic control valves are installed is arranged at the upper part. In a transmission in which a transfer is provided below the valve body, an oil receiver for receiving the lubricating oil discharged from the valve body is provided below the valve body, and the oil receiver receives the oil. A lubricating oil guide path for guiding the lubricating oil to the transfer is provided.

[0007]

According to the structure of the present invention, the lubricating oil discharged from the upper valve body is once received by the oil receiving body, and then this lubricating oil is guided to the transfer by the lubricating oil guide path. As a result, it is possible to effectively use the lubricating oil discharged from the valve body, to achieve good transfer lubrication, and to reduce the agitation resistance due to the planetary gear and the friction element located below the valve body. Moreover, the temperature rise of the lubricating oil can be suppressed.

[0008]

Embodiments of the present invention will now be described in detail and specifically with reference to the drawings. 1 to 4 show an embodiment of the present invention. In FIGS. 1 and 4, reference numeral 2 is an automatic transmission mounted on a vehicle. Although not shown, the transmission 2 is provided with a valve body 4 having various hydraulic control valves and various solenoid valves for operating the various hydraulic control valves.

The valve body 4 is, as shown in FIG.
The valve body cover 10 is fixed to the body mounting portion 6 and is covered with a valve body cover 10 that is connected to the transmission case 8. Further, when the transmission 2 is mounted on a vehicle, it is arranged on the upper portion as shown in FIG. ..

Further, in the transmission 2, a transfer 12 is provided below the valve body 4 located at the upper part. The transfer 12 distributes driving force from an engine (not shown).

That is, in the transfer 12, as shown in FIG. 2, a small-diameter first gear 16 is fixed to a first shaft 14 on the side of a speed change portion (not shown), and a large-diameter second gear 16 is attached to the first gear 16. The gear 18 is meshed, the second gear 18 is fixed to one end side of a second shaft 20 substantially parallel to the first shaft 14, and the first bevel gear 22 is fixed to the other end side of the second shaft 20. A second bevel gear 24, which is an output gear, is meshed with the first bevel gear 22, the second bevel gear 24 is fixed to one end of an output shaft 26 that is substantially orthogonal to the second shaft 20, and the other end of the output shaft 26 is fixed. The driving shaft connecting flange 28 is fixed to the side.

One end of the second shaft 20 is held by the rear transfer case 30, and the other end of the second shaft 20 is held by the transmission case 8 via the first retainer 32.

The output shaft 26 has the second retainer 3
It is held in the transmission case 8 via the.

A space 36 is provided below the valve body 4.
A planetary gear and a friction element (not shown) are arranged through the.

Therefore, in the space 36 below the valve body 4, the bottom portion 38a is gradually inclined to one side and the side portion 38 is formed.
The oil plate 38 is a dish-shaped lubricating oil receiver in which b is erected.
Are provided (see FIGS. 1 and 3).

An oil outflow hole 40 is formed at the lowest portion of the oil plate 38, that is, at a corner portion on the transmission case 8 side.

A lubricating oil guide path 42 is formed in the transmission case 8 below the oil outflow hole 40. One end of the lubricating oil guide path 42 is a part of the gear casing 4 of the transmission case 8.
4 is formed in a recess 46 lower than the top portion, the central portion is formed to be inclined along the outer surface of the transmission case 8, and is formed to reach the substantially central portion of the second retainer 34 located below. It In the second retainer 34, the lubricating oil guide path 4
A retainer communication passage 50 that communicates with the other end of 2 and opens into the retainer space 48 is formed. Further, the second retainer 3
A return passage 52 for returning the lubricating oil is formed in the lower portion of 4.

The output shaft 26 is rotatably supported by front and rear roller bearings 54 and 56 which are separated from each other.

Next, the operation of this embodiment will be described.

Lubricating oil pumped by an oil pump (not shown) built in the transmission 2 is supplied to the valve body 4
Is supplied to the valve body 4, and the pressure is adjusted in the valve body 4 as needed. At this time, excess lubricating oil is discharged from the valve body 4.

The discharged lubricating oil is used for the valve body 4
Falls below and is received by the oil plate 38.
This lubricating oil flows out from the lowest oil outflow hole 40, is supplied to the output shaft 26 through the lubricating oil guide path 42, and lubricates the output shaft 26 and the front and rear roller bearings 54 and 56. Run off from the reflux path 52.

As a result, the lubricating oil discharged from the valve body 4 is guided to the transfer 12 side for use instead of being simply dropped, so that the lubricating oil can be effectively used and the transfer 12 can be lubricated. Can be actively done.

Moreover, since the lubricating oil discharged from the valve body 4 does not reach the planetary gears, friction elements and the like below, the stirring resistance can be reduced and the temperature rise of the lubricating oil can be suppressed.

Further, according to the structure of this embodiment, since it is possible to supply the lubricating oil to the transfer 12 by utilizing the height difference, it is not necessary to pump the lubricating oil by an oil pump or the like, which is practically advantageous. ..

In this embodiment, the lubricating oil guide passage 42 is formed in the transmission case 8, but the lubricating oil guide passage 40 is not provided.
It is also possible to form the pipe with parts such as pipes and hoses.

[0026]

As is apparent from the above detailed description, according to the present invention, an oil receiving body for receiving the lubricating oil discharged from the valve body located at the upper portion is provided below the valve body, and the oil receiving body is provided. By providing the lubricating oil guide path that guides the received lubricating oil to the transfer below the valve body, it is possible to effectively use the lubricating oil discharged from the valve body, and also to achieve good transfer lubrication. Moreover, the stirring resistance due to the planetary gear and the friction element located below the valve body is reduced, and
The temperature rise of the lubricating oil can be suppressed.

[Brief description of drawings]

1 is a partial cross-sectional view of the transmission taken along the line I-I of FIG.

FIG. 2 is a partial sectional view of the transmission taken along the line 〓-〓 of FIG.

FIG. 3 is a plan view of the 〓-〓 line of FIG. 1 with a valve body and a valve body cover removed.

FIG. 4 is a plan view of the transmission.

[Explanation of symbols]

 2 Gearbox 4 Valve body 8 Gearbox 12 Transfer 36 Space 38 Oil plate 40 Oil outflow hole 42 Lubricating oil guideway

Claims (1)

[Claims] 1. A transmission in which a valve body, in which various hydraulic control valves and various solenoid valves for operating the various hydraulic control valves are installed, is disposed in an upper portion, and a transfer is disposed below the valve body. An oil receiving body that receives the lubricating oil discharged from the valve body is provided below the valve body, and a lubricating oil guide path that guides the lubricating oil received by the oil receiving body to the transfer is provided. Lubrication structure of transmission.