KR101633492B1 - Shaft of transmission and method to manufacture the same - Google Patents

Shaft of transmission and method to manufacture the same Download PDF

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Publication number
KR101633492B1
KR101633492B1 KR1020150130848A KR20150130848A KR101633492B1 KR 101633492 B1 KR101633492 B1 KR 101633492B1 KR 1020150130848 A KR1020150130848 A KR 1020150130848A KR 20150130848 A KR20150130848 A KR 20150130848A KR 101633492 B1 KR101633492 B1 KR 101633492B1
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KR
South Korea
Prior art keywords
oil supply
supply holes
oil
supply hole
extended
Prior art date
Application number
KR1020150130848A
Other languages
Korean (ko)
Inventor
김선홍
Original Assignee
주식회사 세일정밀
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Priority to KR1020150130848A priority Critical patent/KR101633492B1/en
Application granted granted Critical
Publication of KR101633492B1 publication Critical patent/KR101633492B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/042—Guidance of lubricant
    • F16H57/043—Guidance of lubricant within rotary parts, e.g. axial channels or radial openings in shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/042—Guidance of lubricant
    • F16H57/0427—Guidance of lubricant on rotary parts, e.g. using baffles for collecting lubricant by centrifugal force

Abstract

Disclosed are a rotational shaft of a transmission, and a method for processing the same. The rotational shaft of a transmission can be applied to an automatic transmission for a vehicle or a lubricating oil supply hole of the rotational shaft of a manual transmission and improves lubricating performance of the transmission. According to the present invention, the rotational shaft of the transmission comprises: a hollow portion where lubricating oil is supplied and provided in the longitudinal direction; the oil supply holes provided in the radial direction while being arranged in the hollow portion at intervals; and the expansion oil supply holes provided to the same center line with the oil supply holes and having a larger diameter than the diameter of the oil supply hole.

Description

TECHNICAL FIELD [0001] The present invention relates to a transmission shaft of a transmission,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary shaft of a transmission for improving the lubrication performance of a transmission, which can be applied to a lubricating oil supply hole of a vehicular automatic transmission or a manual transmission rotary shaft, and a method of processing the same.

Generally, an automatic transmission installed in a vehicle includes a torque converter, an operating mechanism including a clutch and a brake, a planetary gear set, a hydraulic control mechanism, and an electronic control mechanism.

The torque converter is installed between the engine and the transmission and uses the fluid to transmit the driving force of the engine to the transmission. When a rotational power is inputted from the torque converter, the power train in which a plurality of planetary gear sets are combined shifts it to a multi-stage and transmits it to the output shaft. The planetary gear set includes a sun gear, a planetary gear, and a ring gear. The friction element includes a clutch for selectively transmitting power and a brake for restricting the operating element. In this automatic transmission, lubricating oil is supplied through the rotating shaft in consideration of the rotation of the gears and the friction of each supporting portion. The rotating shaft is axially provided with a hollow portion therein, in which the oil supply holes are provided for the clutch or brake element in the radial direction. These oil supply holes are spaced along the axial direction. These oil supply holes have the same diameter as each other or are formed by adjusting the diameter of the oil supply hole in comparison with other parts depending on the supply flow rate of the lubricating oil.

In the case where the oil supply holes provided in the rotary shaft of such a conventional transmission are formed to have the same diameter as the intervals, the flow rate of the oil supplied to the oil supply holes distant from the oil inlet of the hollow portion may become insufficient. In this case, the lubricating oil can not be sufficiently transmitted to the friction elements such as the clutch and the brake, which may result in deterioration of the durability of the transmission.

In addition, the oil supply holes must be designed to be optimized and readjusted through lubrication tests.

Further, when the oil supply hole of the rotary shaft is machined by varying the diameters of the oil supply holes provided in the rotary shaft of the transmission, the machining cost is increased and the degree of freedom of design is lowered.

Korean Registered Patent No. 10-1093586 (registered on December 07, 2011)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide an oil supply apparatus for an internal combustion engine, Thereby increasing the durability of the transmission.

It is still another object of the present invention to provide a method of machining an oil supply hole of a transmission rotation shaft that facilitates machining and increases the degree of freedom in design, while supplying an optimum flow rate to a required position when machining an oil supply hole provided in a rotary shaft of a transmission .

In order to accomplish the object of the present invention as described above, the present invention provides a lubricating oil supply apparatus comprising a hollow portion provided with a lubricating oil and provided in a longitudinal direction, a plurality of oil supply holes provided in a radial direction at intervals in the hollow portion, And a plurality of extended oil supply holes provided in the same center line as the oil supply holes and having a larger diameter than the diameter of the oil supply holes.

It is preferable that the plurality of oil supply holes have the same diameter.

It is preferable that a plurality of the extended oil supply holes have the same diameter.

It is preferable that the plurality of extended oil supply holes have different depths.

It is preferable that the plurality of extended oil supply holes have a shallower depth as the distance from the oil inflow portion increases.

The plurality of extended oil supply holes may be formed in a tapered shape.

It is preferable that a plurality of the extended oil supply holes have a larger diameter on the surface side of the rotating shaft than a diameter on the center side of the rotating shaft.

The present invention also relates to an oil supply hole processing step of machining a rotary shaft into a hollow portion, machining a plurality of oil supply holes through the hollow portion on the surface of the rotary shaft with the same diameter,

And an extended oil supply hole machining step of machining the extended oil supply hole from the surface of the rotary shaft to the oil supply hole side with respect to the center of the oil supply hole and machining to a diameter larger than the diameter of the oil supply hole A method of machining a rotary shaft of a transmission is provided.

Preferably, the step of machining the extended oil supply hole further includes processing the shallower depth of the extended oil supply hole when the distance from the oil inlet of the hollow portion is increased in the axial direction.

The embodiment of the present invention has an effect of increasing the durability of the transmission by optimally supplying the lubricating oil to the oil inlet of the hollow portion where the lubricating operation is required, such as an operating mechanism such as a brake and a clutch disposed further along the axial direction.

Further, in the embodiment of the present invention, the oil supply hole is machined with the same diameter, the extended oil supply hole is machined with a diameter larger than the diameter of the oil supply hole on the same center line as the oil supply hole, It is possible to adjust the depth of the hole, thereby providing an optimum amount of lubricating oil at a place where lubricating oil is required, while also facilitating processing and increasing design freedom.

1 is a cross-sectional view illustrating an automatic transmission according to an embodiment of the present invention.
2 is a cross-sectional view of the rotary shaft taken along the longitudinal direction thereof in order to explain the embodiment of the present invention.
FIG. 3 is an enlarged view of a portion of FIG. 2 in detail.
4 is a cross-sectional view showing a part of the rotary shaft cut in the axial direction to explain another example of the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

1 is a cross-sectional view for explaining an embodiment of the present invention, showing an automatic transmission cut in the axial direction. Embodiments of the present invention can be applied to both automatic transmissions and manual transmissions, and an automatic transmission will be described as an example for convenience of explanation.

The automatic transmission includes friction elements such as the torque converter 1, the clutches 3, 5, 7 and 9, the brake 11 and the planetary gear set 13. When the rotational power of the engine is inputted into the torque converter, the automatic transmission is shifted to the multi-stage and transmitted to the drive shaft. The rotary shaft 15 provided in the automatic transmission can transmit the rotational power of the engine to a drive shaft (not shown) and simultaneously supply lubricating oil to each friction element.

FIG. 2 is a cross-sectional view for explaining an embodiment of the present invention. FIG. 3 is an enlarged view of a main portion of FIG. 2 and shows a rotational shaft 15 of the automatic transmission. The rotary shaft 15 of the transmission of the embodiment of the present invention includes a hollow portion 21, a plurality of oil supply holes 25, 27 and 29, and a plurality of extended oil supply holes 31, 33 and 35.

The hollow portion 21 is provided in the longitudinal direction (axial direction) of the rotary shaft 15 and can be supplied with lubricating oil. In the embodiment of the present invention, the oil is supplied from the right side to the left side of the hollow portion 21 with reference to FIG. 2 as a reference. The oil supplied to the hollow portion 21 can be supplied with the lubricating oil at a constant pressure from the oil pump.

A plurality of oil supply holes 25, 27, 29 are provided in the radial direction at intervals. The plurality of oil supply holes 25, 27, and 29 are connected to the hollow portion 21. In the embodiment of the present invention, the number of the oil supply holes 25, 27, 29 may be plural, and three examples will be described for convenience of explanation. The plurality of oil supply holes 25, 27, 29 preferably have the same diameter.

The plurality of extended oil supply holes 31, 33 and 35 are provided in the same center line as the plurality of oil supply holes 25, 27 and 29 and are provided in the radial direction at the rotary shaft 15. The plurality of extended oil supply holes 31, 33, and 35 may be provided in the entirety of the oil supply holes 25, 27, and 29, respectively, and may be provided in some of the plurality of oil supply holes Do.

It is preferable that the extended oil supply holes 31, 33, and 35 have diameters larger than the diameters of the plurality of oil supply holes 25, 27, and 29. The extended oil supply holes 31, 33, and 35 may be formed to have a shallower depth as the distances d1, d2, and d3 are further away from the portion where the lubricating oil is supplied. That is, the extended oil supply holes 31, 33, and 35 provided in the oil supply holes 25, 27 and 29 are spaced apart from each other by a distance d1, d2, and d3 from the portion where the lubricating oil is supplied It is preferable that the depth is shallower from the surface of the rotating shaft 15. Therefore, the heights h1, h2, and h3 of the oil supply holes 25, 27, and 29 from the hollow portion 21 become higher as the distances d1, d2, and d3 are further away from the portion where the lubricating oil is supplied. This means that the volume of the oil supply holes 25, 27, 29 increases.

It is preferable that the plurality of extended oil supply holes 31, 33, 35 described above also have the same diameter.

The plurality of oil supply holes 25, 27, 29 are formed to have the same diameter, and can be easily machined by using a tool such as a drill during the processing of the rotary shaft. That is, when machining the plurality of oil supply holes 25, 27 and 29, the oil supply holes 25, 27 and 29 are machined by using one drill, 27, 29) can be reduced.

 Also, the plurality of extended oil supply holes 31, 33, and 35 are formed to have the same diameter. In the process of machining the rotary shaft 15, a single tool can be used to easily process the oil. The working process of the embodiment of the present invention does not need to change the tool such as a drill, and only the depth h1, h2, h3 of the extended oil supply holes 31, 33, can do.

Fig. 4 is a view showing another example of the embodiment of the present invention in comparison with the description of the above-mentioned embodiment.

Another example of the embodiment of the present invention shows an example in which the extended oil supply hole 43 is formed in a tapered shape. That is, the extended oil supply hole 43 of another example of the embodiment of the present invention preferably has a larger diameter on the surface side (outer circumferential surface side) of the rotary shaft than the diameter of the center of the rotary shaft. Another example of this embodiment of the present invention is that it is possible to facilitate the machining while making the diameter of the extended oil supply hole 43 larger than that of the oil supply hole 41, or to easily process it according to the design standard. Of course, although the illustration is omitted, only a part of the extended oil supply hole 43 is formed in a tapered shape, and the surface side of the rotary shaft 15 may be cylindrical as in the above-described embodiment.

The processing and operation of the rotary shaft of the embodiment of the present invention will be described in detail as follows.

First, the worker processes the hollow portion 21 of the rotary shaft 15. The hollow portion 21 of the rotary shaft 15 can be machined using a drill machine or the like and a method of machining hollow portions of various shafts can be used. Then, the oil supply holes 25, 27, 29 are machined through the surface of the rotary shaft 15 from the hollow portion 21 side. The oil supply holes 25, 27, 29 can be machined by a drill machine or the like, and the oil supply holes 25, 27, 29 are machined by using one tool when using the drill.

Then, the extended oil supply holes 31, 33, and 35 are machined using tools of different diameters. It is preferable to process the extended oil supply holes 31, 33 and 35 so as to be located at the same center line as the oil supply holes 25, 27 and 29 while being machined toward the center of the rotary shaft at the front surface side of the rotary shaft 15 Do. At this time, it is preferable to use a larger diameter tool for machining the extended oil supply holes 31, 33, and 35 than when machining the oil supply holes 25, 27, and 29 with a machining tool such as a drill.

It is preferable that the extended oil supply holes 31, 33, 35 are formed so as to have a shallower depth as the distance from the oil inlet is designed according to the design. This determines the flow rate supplied to each friction element depending on the volume of the oil supply holes 25, 27, 29 of the rotating body such as the rotating shaft. That is, the extended oil supply holes 31, 33, and 35 can vary the height of the oil supply holes 25, 27, and 29 according to the distance from the oil inlet, thereby optimizing the flow rate supplied to each friction element.

When the oil flows into the hollow portion 21 through the oil inlet, the rotary shaft 15 thus processed has an optimized amount of oil supplied through the oil supply holes 25, 27 and 29 to the extended oil supply holes 31, 33, 35).

Therefore, the optimized lubrication oil is supplied to the respective friction elements through the extended oil supply holes 31, 33 and 35, thereby preventing the lubrication performance from being deteriorated. Therefore, the embodiment of the present invention can increase the durability of the transmission, and also eliminates the need for machining the oil supply holes provided in the rotary shaft to various diameters. The embodiment of the present invention can more easily process the rotary shaft 15 and adjust the height of the oil supply holes 25, 27 and 29 according to the depth adjustment of the extended oil supply holes 31, 33 and 35 It is possible to set the flow rate of the lubricating oil supplied through the rotary shaft 15 due to the change in the volume of the oil supply holes 25, 27 and 29, thereby increasing the design freedom of the transmission.

The rotary shaft 15 thus processed can sufficiently supply the lubricating oil required for the lubricating action of each friction element even when the lubricating oil supplied to the oil inlet side is away from the oil inlet side and the oil pressure is lowered.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And it goes without saying that the invention belongs to the scope of the invention.

1. Torque converter,
3, 5, 7, 9. Clutch,
11. Brake,
13. Planetary gear set,
15. Rotation axis,
21. Hollow,
25, 27, 29, 41. Oil supply holes,
31, 33, 35, 43. Extension oil supply hole

Claims (9)

A hollow portion supplied with lubrication oil and provided in the longitudinal direction,
A plurality of oil supply holes provided at intervals in the hollow portion in a radial direction, and
And a plurality of extended oil supply holes provided in the same center line as the plurality of oil supply holes and having a diameter larger than the diameter of the oil supply holes,
At least three oil supply holes and an extended oil supply hole,
The plurality of oil supply holes are formed to have the same diameter, and at the same time, the more deep the oil is, the deeper the oil is,
Wherein the plurality of extended oil supply holes are formed to have the same diameter as each other, and at the same time, the depth is shallower as the oil is farther from the oil inflow portion. delete delete delete delete The method according to claim 1,
Wherein the plurality of extended oil supply holes are formed in a tapered shape. The method of claim 6,
Wherein the plurality of extended oil supply holes have a larger diameter on a surface side of the rotating shaft than a diameter of a center side of the rotating shaft. Processing the rotating shaft into a hollow portion,
An oil supply hole machining step for machining the oil supply hole through the hollow portion on the surface of the rotary shaft with the same diameter, and
And an extended oil supply hole machining step of machining the extended oil supply hole from the surface of the rotary shaft to the oil supply hole side with respect to the center of the oil supply hole and machining to a diameter larger than the diameter of the oil supply hole In addition,
Wherein at least three of the oil supply holes and the extended oil supply holes are machined in the oil supply hole processing step and the extended oil supply hole processing step,
In the oil supply hole processing step
The depth of the oil supply hole is deeper as the distance from the oil inlet of the hollow portion increases in the axial direction,
In the expanded oil supply hole processing step
And the depth of the extended oil supply hole is made shallower as the distance from the oil inlet of the hollow portion increases in the axial direction. delete
KR1020150130848A 2015-09-16 2015-09-16 Shaft of transmission and method to manufacture the same KR101633492B1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55103154A (en) * 1979-01-30 1980-08-07 Nissan Motor Co Ltd Main shaft for transmission gear
JPH04175561A (en) * 1990-11-05 1992-06-23 Aisin Aw Co Ltd Automatic transmission
JPH0559039U (en) * 1991-04-16 1993-08-03 株式会社フジユニバンス Lubrication structure of power transmission device
JP2004517268A (en) * 2000-05-24 2004-06-10 ツェットエフ、フリードリッヒスハーフェン、アクチエンゲゼルシャフト Automatic transmission
KR101093586B1 (en) 2009-02-27 2011-12-15 현대 파워텍 주식회사 Automatic transmission for lubrication

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55103154A (en) * 1979-01-30 1980-08-07 Nissan Motor Co Ltd Main shaft for transmission gear
JPH04175561A (en) * 1990-11-05 1992-06-23 Aisin Aw Co Ltd Automatic transmission
JPH0559039U (en) * 1991-04-16 1993-08-03 株式会社フジユニバンス Lubrication structure of power transmission device
JP2004517268A (en) * 2000-05-24 2004-06-10 ツェットエフ、フリードリッヒスハーフェン、アクチエンゲゼルシャフト Automatic transmission
KR101093586B1 (en) 2009-02-27 2011-12-15 현대 파워텍 주식회사 Automatic transmission for lubrication

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