JPH0754682Y2 - Transmission casing structure - Google Patents

Transmission casing structure

Info

Publication number
JPH0754682Y2
JPH0754682Y2 JP9826191U JP9826191U JPH0754682Y2 JP H0754682 Y2 JPH0754682 Y2 JP H0754682Y2 JP 9826191 U JP9826191 U JP 9826191U JP 9826191 U JP9826191 U JP 9826191U JP H0754682 Y2 JPH0754682 Y2 JP H0754682Y2
Authority
JP
Japan
Prior art keywords
casing
oil
peripheral wall
hole
inner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP9826191U
Other languages
Japanese (ja)
Other versions
JPH0547601U (en
Inventor
節一 赤井
Original Assignee
三菱自動車エンジニアリング株式会社
三菱自動車工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱自動車エンジニアリング株式会社, 三菱自動車工業株式会社 filed Critical 三菱自動車エンジニアリング株式会社
Priority to JP9826191U priority Critical patent/JPH0754682Y2/en
Publication of JPH0547601U publication Critical patent/JPH0547601U/en
Application granted granted Critical
Publication of JPH0754682Y2 publication Critical patent/JPH0754682Y2/en
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/0412Cooling or heating; Control of temperature
    • F16H57/0415Air cooling or ventilation; Heat exchangers; Thermal insulations
    • F16H57/0416Air cooling or ventilation

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission casing structure for accommodating a transmission gear of an automobile.

[0002]

2. Description of the Related Art FIG. 4 shows a general automobile manual transmission 1. This is a first casing 2 called a mission case, and a second casing 4 which is an adapter (intermediate joint housing) connected to the rear end of the first casing 2 through an intermediate partition 3 called an intermediate plate. And a transfer casing 5 is continuously provided on the rear end side.

An input shaft 6 for inputting a driving force from a front engine is rotatably mounted on a front end wall 2a of the first casing 2 through a bearing 7, and is coaxial with a rear end of the input shaft 6. The main shaft 8 is rotatably provided from the inside of the first casing 2 through the bearings 9 and 10 to the intermediate partition wall 3 and the rear end wall 4a of the second casing 4, respectively.
Further, the counter shaft 11 is rotatable in parallel with the main shaft 8 from inside the first casing 2 through the bearings 12, 13 and 14 to the intermediate partition wall 3 and the rear end wall 4a of the second casing 4, respectively. It is provided in. The counter shaft 11 has its front end side interlocked with the input shaft 6 via interlocking gears 15a and 15b.

Fourth gears 16a and 16b are provided on the rear surface of the interlocking gear 15a at the rear end of the input shaft 6 and on the front end of the main shaft 8. Further, the main shaft 8 and the counter shaft 11 are provided with a third speed gear 17a, 17b, a second speed gear 18a, 18b, and a first speed gear, respectively.
High speed (low) gears 19a and 19b and fifth speed (overdrive) gears 20a and 20b are sequentially provided from the front side. The driving force transmitted to the main shaft 8 through these various gears is transmitted to a rear output shaft and a front output shaft (not shown) via a transfer shaft 21 that is continuously provided on the rear end side of the main shaft 8. .

Here, the low speed gears 16a, 16b to 19a, 19b from the fourth speed to the first speed are arranged in the first casing 2 and the high speed gears 20a, 20b of the fifth speed.
Are located in the second casing 4.

Further, in the first casing 2 and the second casing 4, the shafts 8 and 11 and various gears 1 are provided.
An appropriate amount of oil A is added for smooth movement of movable parts such as 5a, 15b to 20a, 20b and for heat dissipation. This oil A passes through the oil hole 22 and the bearing 13 provided in the lower portion of the intermediate partition wall 3 and then the first oil
It can flow back and forth between the inside of the casing 2 and the inside of the second casing 4.

[0007]

In the transmission having the above-mentioned structure, when the engine is stopped, the oil A is accumulated at the bottoms of the first casing 2 and the second casing 4 at a substantially equal level. , Especially 5th gear 2
When traveling at high speeds 0a and 20b, the fifth gear 20a
Oil A which has viscosity due to oil agitation accompanying high speed rotation of
Is strongly attracted from the inside of the first casing 2 into the second casing 4 through the oil hole 22 and the bearing 13,
The oil level in the second casing 4 becomes abnormally high. For this reason, the fifth speed gears 20a and 20b have to rotate while agitating against the viscous resistance in the oil that has accumulated in a large amount, so that the agitation resistance causes a large power loss and a sharp increase in the oil temperature. There were problems such as deterioration of performance as a lubricating oil and reduction of oil life.

The present invention has been made in view of the above circumstances.
The purpose is to prevent an abnormal increase in the oil level in the second casing containing the high-speed gear even during high-speed traveling with the high-speed gear, and reduce power loss due to stirring resistance. In addition, it is possible to provide a casing structure of a transmission that can improve heat dissipation of oil and prevent deterioration of lubrication performance and oil life.

[0009]

In order to achieve the above-mentioned object, the transmission casing structure of the present invention comprises:
A first casing for accommodating the low speed gear and a second casing for accommodating the high speed gear are provided.
In the lower part of the partition wall that separates the casing of the second casing from the casing of the second casing, there is provided an oil hole through which oil flows between the casings of the first casing and the second casing.
An oil passage is formed between the inner and outer peripheral walls of the first casing having an inner-outer double wall structure, and an oil guide hole for guiding the oil in the second casing to the oil passage is provided above the partition wall. An oil return hole for returning the oil in the oil passage to the inside of the inner peripheral wall of the first casing is provided in the inner peripheral wall of the first casing.

[0010]

According to the casing structure of the transmission having the above-described structure, during high speed traveling by the fifth speed gear, viscous oil is generated from the inside of the first casing due to oil agitation accompanying the high speed rotation of the fifth speed gear. Is strongly drawn into the second casing via the, and the oil level in the second casing rises. Then, the oil that has risen into the second casing is quickly guided and flows from the oil guide hole in the upper portion of the partition wall to the oil passage between the inner and outer peripheral walls of the first casing having the double wall structure. This prevents the oil level in the second casing from rising abnormally and reduces power loss due to oil agitation resistance during rotation of the high speed gear.

The oil flowing from the inside of the second casing into the oil passage between the inner and outer peripheral walls of the first casing through the oil guide hole is efficiently radiated to the outside from the outer peripheral wall of the first casing. It is said that the oil is returned from the oil return hole of the inner peripheral wall of the first casing to the inner side of the inner peripheral wall of the first casing in a low temperature state, and then sucked into the second casing through the oil hole and the bearing again. As a result, the heat is efficiently radiated in the oil passage, and the oil circulates in the first casing and the second casing.
Even when traveling at high speed, the heat dissipation of oil is high, and the rise in oil temperature is suppressed, and the deterioration of lubrication performance and oil life can be prevented.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the figure, the same components as those shown in FIG. 4 are designated by the same reference numerals to simplify the description.

First, as shown in FIG.
Low speed gears 16a, 16b to 19 from the fourth speed to the first speed
a first casing 2 for accommodating a and 19b and a second casing 4 for accommodating fifth-speed high speed gears 20a and 20b, and the first casing 2 and the second casing 4 An oil hole 22 is formed in the lower part of the intermediate partition wall 3 that separates the two from each other, and the oil A can flow through the oil hole 22 so as to move back and forth between the inside of the first casing 2 and the inside of the second casing 4. It is like this.

Here, the first casing 2 has an inner / outer double wall structure except for the vicinity of the upper side, and a space is formed between the inner peripheral wall 31 and the outer peripheral wall 32, and this space is oil. It is designated as road 33. It should be noted that a plurality of reinforcing ribs 34 are provided between the inner peripheral wall 31 and the outer peripheral wall 32 forming the oil passage 33. Further, a plurality of heat radiation fins 35 are integrally provided on the outer surface of the outer peripheral wall 32 so as to project therefrom.

On the other hand, an oil guide for guiding the oil A to the oil passage 33 when the oil A rises in the second casing 4 is provided at a portion of the intermediate partition wall 3 above the one side at an appropriate height. A hole 36 is formed. In addition, on the side surface of the second casing 4 of the intermediate partition wall 3, an oil introduction shelf 37 that obliquely rises from the lower edge of the opening of the oil guide hole 36.
Is projected.

Further, the inner peripheral wall 3 of the first casing 2
An oil return hole 38 for returning the oil in the oil passage 33 to the inside of the inner peripheral wall 31 of the first casing 2 is provided at the lower front end of the first casing 1.

According to the transmission casing structure thus constructed, however, the fifth speed gear 20
During high-speed traveling by the a and 20b, the oil A having viscosity due to oil agitation accompanying the high-speed rotation of the fifth speed gear 20a passes from the inside of the first casing 2 through the oil hole 22 of the intermediate partition wall 3 and the bearing 13 to the second. The oil level in the second casing 4 rises because the oil is strongly attracted to the casing 4. Then, the oil A that has risen into the second casing 4 is transferred to the oil introduction shelf 37 above the intermediate partition wall 3.
As a result, the oil is quickly guided from the oil guide hole 36 to the oil passage 33 between the inner and outer peripheral walls 31 and 32 of the first casing 2 having the double-wall structure. This prevents the oil level in the second casing 4 from rising abnormally and reduces power loss due to oil agitation resistance during rotation of the high speed gears 20a and 230b.

Further, the inner and outer peripheral wall 3 of the first casing 2 is provided from the inside of the second casing 4 through the oil guide hole 36.
The oil A flowing out to the oil passage 33 between the first and the second 32
Heat is efficiently radiated to the outside from the outer peripheral wall of the casing 2 of
In the low temperature state, the oil is returned from the oil return hole 38 of the inner peripheral wall 31 of the first casing 2 to the inner side of the inner peripheral wall 31 of the first casing 2, and then again through the oil hole 22 of the intermediate partition wall 3 and the bearing 13. In other words, it is drawn into the casing 4 and efficiently radiates heat in the oil passage 33 and circulates in the first casing 2 and the second casing 4. For this reason, the heat dissipation of the oil is high even during high-speed traveling, the rise in the oil temperature is suppressed, and the deterioration of the lubricating performance and the oil life can be prevented.

At this time, as described above, the outer peripheral wall 32 of the oil passage 33 is formed.
Since a plurality of radiating fins 35 are provided in the projection, the radiating fins 35 radiate the heat of the oil flowing in the oil passage 33 more efficiently.

The oil return hole 38 is replaced with the oil guide hole 36.
Since it is formed at the lower front end portion of the inner peripheral wall 31 of the first casing 2 farthest from the oil return hole 3 through the oil guide hole 36 from the second casing 4 through the oil guide hole 36.
The oil passage from 8 to the inside of the first casing 2 is long, and the heat of the oil A can be sufficiently radiated during that time, and the oil A returns to the inside of the first casing 2 through the long passage. By that, the first casing 2
The oil level in the inside of the second casing 4 can be suppressed to a low level, and the amount of oil drawn into the second casing 4 can be reduced, so that the increase in the oil level in the second casing 4 during high-speed traveling can be appropriately suppressed. .

In the above-described embodiment, the space between the inner peripheral wall 31 and the outer peripheral wall 32 of the first casing 2 is simply the oil passage 33, but the oil passage 33 is reinforced by a plurality of stages. The rib 34 may be formed in a meandering flow path by lengthening it in the front-rear direction to further lengthen the oil flow path to further improve the oil cooling efficiency.

[0022]

Since the transmission casing structure of the present invention is constructed as described above, the oil level in the second casing accommodating the high-speed gear is abnormal even during high-speed traveling with the high-speed gear. It is possible to prevent such a rise in temperature, reduce power loss due to agitation resistance, and improve the heat dissipation of oil to prevent deterioration of lubricating performance and oil life.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a transmission casing structure according to the present invention.

FIG. 2 is a sectional view taken along line XX in FIG.

3 is a cross-sectional view taken along the line YY of FIG.

FIG. 4 is a cross-sectional view showing a conventional transmission casing structure.

[Explanation of symbols]

2 ... 1st casing, 3 ... partition, 4 ... 2nd casing, 22 ... oil hole, 31 ... inner peripheral wall, 32 ... outer peripheral wall, 3
3 ... Oil passage, 36 ... Oil guide hole, 38 ... Oil return hole.

Claims (1)

[Scope of utility model registration request]
1. A partition wall that includes a first casing that houses a low-speed gear and a second casing that houses a high-speed gear, and that partitions the first casing and the second casing from each other. In the casing structure of the transmission, an oil hole is provided in the lower part of the oil so that oil flows between the first and second casings.
An oil passage is formed between the inner and outer peripheral walls of the first casing having an inner-outer double wall structure, and an oil guide hole for guiding the oil in the second casing to the oil passage is provided above the partition wall. A casing structure for a transmission, characterized in that an oil return hole for returning the oil in the oil passage to the inside of the inner peripheral wall of the first casing is provided in the inner peripheral wall of the first casing.
JP9826191U 1991-11-28 1991-11-28 Transmission casing structure Expired - Lifetime JPH0754682Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9826191U JPH0754682Y2 (en) 1991-11-28 1991-11-28 Transmission casing structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9826191U JPH0754682Y2 (en) 1991-11-28 1991-11-28 Transmission casing structure

Publications (2)

Publication Number Publication Date
JPH0547601U JPH0547601U (en) 1993-06-25
JPH0754682Y2 true JPH0754682Y2 (en) 1995-12-18

Family

ID=14215012

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9826191U Expired - Lifetime JPH0754682Y2 (en) 1991-11-28 1991-11-28 Transmission casing structure

Country Status (1)

Country Link
JP (1) JPH0754682Y2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19817936A1 (en) * 1998-04-17 1999-10-28 Mannesmann Ag Drive arrangement
JP4581583B2 (en) * 2004-09-16 2010-11-17 トヨタ自動車株式会社 Transmission lubrication structure
JP4624868B2 (en) * 2005-06-21 2011-02-02 株式会社クボタ Cooling structure of hydrostatic continuously variable transmission
JP2013029128A (en) * 2011-07-27 2013-02-07 Aisin Ai Co Ltd Transmission lubricating device
JP6439995B2 (en) * 2014-10-31 2018-12-26 愛知機械工業株式会社 Transmission case and transmission including the same
WO2019229848A1 (en) * 2018-05-29 2019-12-05 株式会社ユニバンス Lubricating structure for power transmission device

Also Published As

Publication number Publication date
JPH0547601U (en) 1993-06-25

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Legal Events

Date Code Title Description
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 19960611

EXPY Cancellation because of completion of term