KR101786257B1 - Input shaft of automatic transmission - Google Patents

Input shaft of automatic transmission Download PDF

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Publication number
KR101786257B1
KR101786257B1 KR1020150184730A KR20150184730A KR101786257B1 KR 101786257 B1 KR101786257 B1 KR 101786257B1 KR 1020150184730 A KR1020150184730 A KR 1020150184730A KR 20150184730 A KR20150184730 A KR 20150184730A KR 101786257 B1 KR101786257 B1 KR 101786257B1
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KR
South Korea
Prior art keywords
input shaft
oil
automatic transmission
angle
internal angle
Prior art date
Application number
KR1020150184730A
Other languages
Korean (ko)
Other versions
KR20170075282A (en
Inventor
정시섭
Original Assignee
현대 파워텍 주식회사
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Application filed by 현대 파워텍 주식회사 filed Critical 현대 파워텍 주식회사
Priority to KR1020150184730A priority Critical patent/KR101786257B1/en
Publication of KR20170075282A publication Critical patent/KR20170075282A/en
Application granted granted Critical
Publication of KR101786257B1 publication Critical patent/KR101786257B1/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
    • F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
    • F16H57/0426—Means for guiding lubricant into an axial channel of a shaft
    • 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
    • F16H57/0428—Grooves with pumping effect for supplying lubricants
    • 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
    • F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Details Of Gearings (AREA)

Abstract

The present invention relates to an input shaft of an automatic transmission in which sufficient oil can be supplied to a portion where lubrication is required.
The input shaft of the automatic transmission according to the present invention is an input shaft of an automatic transmission provided inside a automatic transmission and having a hollow portion for allowing oil supplied from an oil pump to flow therethrough, An oil discharge hole is formed along each groove so as to supply oil from the groove to the outside of the input shaft, and an imaginary line connecting the position of the oil discharge hole is formed along the input shaft And is formed into a spiral shape.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an input shaft of an automatic transmission,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input shaft installed in an automatic transmission, and more particularly, to an input shaft of an automatic transmission in which sufficient oil can be supplied to a portion where lubrication is required.

As shown in Fig. 1, the automatic transmission includes a rotating element such as the torque converter 12, the gear assembly 14, the clutch assemblies 13 and 15, or a power interrupting component in the housing 11 And an input shaft 120 through which the power is input to the automatic transmission 10 is installed in the automatic transmission 10 at a center thereof to shift the rotational force input from the engine and output to the drive shaft.

The input shaft 120 has a circular hollow section 121 formed therein and an oil discharge hole 122 communicating with the hollow 121 and the outside of the input shaft 120 is connected to the input shaft 120. [ And one end of the input shaft 120 is connected to an oil pump 16 for supplying oil to the hollow portion 121 of the input shaft 120.

When the engine is driven to rotate the input shaft 120, the oil filled in the input shaft 120 is discharged to the oil discharge hole 122 by the centrifugal force, .

When the input shaft 120 rotates more than a predetermined number of revolutions, sufficient oil is discharged from the input shaft 120 to smoothly perform lubrication.

However, the input shaft 120 of the prior art has a circular inner cross section so that the centrifugal force due to the rotation of the input shaft 120 acts evenly on the inner side, and the oil discharge hole 121 is formed on the inner surface of the input shaft 120 When the rotation speed of the input shaft 120 is low, sufficient oil can not be supplied to the inside of the automatic transmission. For example, as to the axial direction of the input shaft 120, a sufficient amount of oil is discharged at a portion where the oil is supplied to the input shaft 120, but the oil flow rate decreases as the distance to the supplied portion increases. In the radial direction of the input shaft 120, oil is sufficiently supplied to a portion close to the input shaft 120 so that there is no problem in lubrication. However, as a portion separated from the input shaft 120, Is not sufficiently supplied.

In this way, if oil is not sufficiently supplied to a part of the interior of the automatic transmission 10, wear or breakage of components constituting the automatic transmission may occur.

On the other hand, the following prior art document discloses a technique relating to an " input shaft for an automatic transmission ".

KR 10-1997-0045963 A

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems described above and to provide an oil pump for an internal combustion engine in which oil is moved through a dedicated oil passage through which oil is supplied to an oil supply portion, And to provide an input shaft of an automatic transmission that allows oil to be discharged from a portion where oil is to be supplied to a supply portion.

In order to achieve the above object, an input shaft of an automatic transmission having a groove, according to the present invention, is provided with an input shaft of an automatic transmission in which a hollow portion is provided so that oil supplied from an oil pump In the shaft, at least one groove is formed in the cross section of the hollow portion.

Wherein the hollow portion is formed in a polygonal shape having a cross section of a first internal angle larger than a flat angle and a second internal angle smaller than a square angle alternately, and the groove is the second internal angle.

 And an oil discharge hole through which the oil is discharged from the hollow portion is formed for each of the alternate second internal angles.

 And the diameter of a virtual circle connecting the vertexes forming the first internal angle is greater than the distance from the virtual circle to the vertex of the second internal angle.

 The first inner angle and the second inner angle are formed at the same angle with each other.

In the meantime, the input shaft of the automatic transmission having the multi-directional oil discharge hole according to the present invention is installed in the automatic transmission, and the input shaft of the automatic transmission, in which the hollow portion is formed, Wherein a plurality of oil discharge holes communicating with the hollow portion and supplying oil from the hollow portion to the outside of the input shaft are formed along the longitudinal direction of the input shaft in the input shaft, And are formed in multiple directions.

 Wherein the hollow portion is formed in a polygonal shape in which a cross-section of the hollow portion is formed by alternating a first internal angle larger than a flat angle and a second internal angle smaller than a square angle, and the oil discharge hole is formed to communicate with the second internal angle.

 And the oil discharge holes are formed at predetermined angular intervals along the circumferential direction of the input shaft.

Further, the input shaft of the automatic transmission having the spiral multi-directional oil discharge hole according to the present invention is installed in the automatic transmission, and includes an input portion of an automatic transmission in which a hollow portion is formed so as to allow oil supplied from the oil pump to flow along the inside thereof, The shaft has a hollow portion formed with grooves uniformly divided in its cross section and an oil discharge hole is formed along each groove to supply oil from the groove to the outside of the input shaft, And one hypothetical line forms a spiral along the input shaft.

According to the input shaft of the automatic transmission according to the present invention having the above-described configuration, the inner end surface of the input shaft is formed into a polygonal shape having an internal angle larger than the square angle and an internal angle smaller than the square angle, and the oil discharge hole is formed along the periphery of the input shaft So that a sufficient amount of oil is discharged to each oil discharge hole irrespective of the number of revolutions.

As a result, a sufficient amount of oil is supplied to the inside of the automatic transmission, thereby preventing the components installed inside the automatic transmission from being worn or damaged.

1 is a sectional view showing an internal structure of a conventional automatic transmission;
2 is a plan view showing an input shaft of an automatic transmission according to the prior art;
3 is a cross-sectional view taken along a line I-I in Fig.
4 is a plan view showing an input shaft of an automatic transmission according to the present invention.
5 is a cross-sectional view taken along the line II-II in Fig.
6 is a sectional view taken along the line III-III in Fig.
7 is a cross-sectional view taken along the line IV-IV in Fig.

Hereinafter, the input shaft of the automatic transmission according to the present invention will be described in detail with reference to the accompanying drawings.

1, a conventional automatic transmission 10 is provided with a rotation element such as a torque converter 12, a gear assembly 14, a clutch assembly 13, 15, or the like, An element for interrupting the power is provided, and an input shaft 20 is provided at the center to shift the rotational force input from the engine and output to the drive shaft.

In the input shaft of the automatic transmission according to the present invention, a hollow portion 21 is formed to allow oil to flow therein. The hollow portion 21 has a polygonal cross-section.

Particularly, the cross section of the hollow portion 21 is formed in the form of an internal gear so that a plurality of grooves through which oil can flow are formed. A first interior angle in which the interior angle of the polygon is larger than a flat angle and a second interior angle smaller than a square angle are alternately formed and the groove is formed as a portion in which the second interior angle is formed.

4 to 5, the hollow section 21 has a polygonal cross section, and the internal angle of the polygon is alternately arranged between a first internal angle larger than the square angle and a second internal angle smaller than the square angle, Shape [*]. Since the flat angle is 180 degrees, the portion protruding toward the center of the hollow portion 21 is formed to have an internal angle larger than the flat angle, that is, a concave angle, and a concave portion toward the center of the hollow portion 21 is smaller And are arranged alternately with each other. In particular, the second internal angle is preferably formed at an acute angle. Here, the concave second internal angle becomes a groove in which the oil can flow along the longitudinal direction of the input shaft 20. [

The hollow shaft 21 communicates with the outside of the oil discharge hole 22 through an oil discharge hole 22 penetrating the input shaft 20 in a radial direction.

At this time, the oil discharge hole 22 is formed in a portion of the hollow 21 where the second internal angle is formed. This is to cause the oil to be discharged through the portion where the centrifugal force is concentrated when the input shaft 20 is rotated.

In addition, the oil discharge hole 22 is formed at a different portion from a second internal angle formed in the hollow portion 21 in plural.

For example, in FIGS. 5 to 7, the hollow portion 21 is formed in a star shape having seven first internal angles and a second internal angle, so that different oil discharge holes 22 are formed in each second internal angle do.

4, an oil discharge hole 22 is formed along the periphery of the input shaft 20, and each oil discharge hole 22 has a second internal angle &thetas; As shown in Fig. Each of the second internal angles is a groove formed along the longitudinal direction of the input shaft 20 so that the oil can flow along the longitudinal direction of the input shaft 20. [

Therefore, when the oil discharge holes 22 are formed in the respective second internal chambers, the oil can be supplied exclusively to the respective oil discharge holes 22.

The oil discharge hole 22 is formed along the longitudinal direction of the input shaft 20 in addition to the oil discharge hole 22 formed along the periphery of the input shaft 20. That is, the oil discharge hole 22 is formed at a position where the clutch assemblies 13 and 15 and the gear assembly 14, which require lubrication, are installed in the automatic transmission 10. Since the oil discharge hole 22 is disposed along the circumferential direction of the input shaft 20 and along the longitudinal direction of the input shaft 20, And forms a spiral at the shaft 20.

On the other hand, the first internal angle formed in the cross section of the hollow portion 21 and the number of internal angles smaller than the square angle can be determined according to the portion where the oil is to be supplied.

The operation of the input shaft of the automatic transmission according to the present invention will now be described.

When the engine is driven, oil is supplied to the inside of the input shaft 20 through the oil pump 16.

The oil supplied to the inside of the input shaft 20 flows along the longitudinal direction of the input shaft 20.

At this time, since the input shaft 20 is in a rotating state, centrifugal force is applied to the oil flowing in the input shaft 20, so that the oil is concentrated on the portion where the second internal angle is formed.

Since the oil is supplied through the second internal angle from one end of the input shaft 20 (the end where the oil is supplied) to the portion where one of the oil discharge holes 22 is formed, the oil is discharged through the oil discharge hole 22 A sufficient amount of oil is discharged to the outside of the input shaft 20 and supplied to the respective internal portions of the automatic transmission 10 to smoothly lubricate them.

Particularly, even when the rotation speed of the input shaft 20 is low, a sufficient amount of oil is collected by the second internal angle, so that the cross-section of the hollow portion has a circular shape, which can solve the problem of poor oil supply compared with the prior art.

Further, in the input shaft of the automatic transmission, which is provided in the interior of the automatic transmission and in which a hollow portion is formed so that the oil supplied from the oil pump can flow through the hollow portion, the hollow portion is formed with grooves An oil discharge hole is formed in each of the grooves along the groove so as to supply oil from the groove to the outside of the input shaft, and a virtual line connecting the positions of the oil discharge holes may be helical along the input shaft .

10: Automatic transmission
11: Housing
12: Torque converter
13: clutch assembly
14: gear assembly
15: clutch assembly
16: Oil pump
20: Input shaft
21:
22: Oil discharge hole
120: Input shaft
121: hollow
122: Oil discharge hole

Claims (9)

An input shaft of an automatic transmission, provided in the interior of an automatic transmission, having a hollow portion through which oil supplied from an oil pump flows,
Wherein at least one groove formed in the cross section along the longitudinal direction of the input shaft is formed in a circumferential direction of the input shaft,
Wherein the hollow portion is formed in a polygonal shape having a cross section of a first internal angle larger than a flat angle and a second internal angle smaller than a square angle alternately and the groove is the second internal angle,
The grooves communicating with each other,
And a plurality of oil discharge holes through which oil is discharged from the hollow portion to an outer side of the input shaft, wherein the oil discharge holes are formed at different positions along the longitudinal direction of the input shaft, And the outer surface of the input shaft is communicated with each other,
Wherein a diameter of a virtual circle connecting vertexes forming the first internal angle is larger than a distance from the virtual circle to a vertex of the second internal angle. delete delete delete The method according to claim 1,
Wherein the first internal angle and the second internal angle are formed at the same angle with respect to each other. delete delete delete delete
KR1020150184730A 2015-12-23 2015-12-23 Input shaft of automatic transmission KR101786257B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150184730A KR101786257B1 (en) 2015-12-23 2015-12-23 Input shaft of automatic transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150184730A KR101786257B1 (en) 2015-12-23 2015-12-23 Input shaft of automatic transmission

Publications (2)

Publication Number Publication Date
KR20170075282A KR20170075282A (en) 2017-07-03
KR101786257B1 true KR101786257B1 (en) 2017-10-17

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110081157B (en) * 2019-05-07 2021-12-21 深圳市合发齿轮机械有限公司 Planetary reducer gear lubricating structure and method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010116930A (en) * 2008-11-11 2010-05-27 Nissan Motor Co Ltd Lubrication device for friction gearing transmission

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010116930A (en) * 2008-11-11 2010-05-27 Nissan Motor Co Ltd Lubrication device for friction gearing transmission

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