KR101691886B1 - Reduction gear case for vehicle having ventilation chamber for preventing oil leakage - Google Patents

Reduction gear case for vehicle having ventilation chamber for preventing oil leakage Download PDF

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Publication number
KR101691886B1
KR101691886B1 KR1020150091960A KR20150091960A KR101691886B1 KR 101691886 B1 KR101691886 B1 KR 101691886B1 KR 1020150091960 A KR1020150091960 A KR 1020150091960A KR 20150091960 A KR20150091960 A KR 20150091960A KR 101691886 B1 KR101691886 B1 KR 101691886B1
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KR
South Korea
Prior art keywords
oil
ventilation chamber
space
discharge space
oil discharge
Prior art date
Application number
KR1020150091960A
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Korean (ko)
Inventor
이상훈
Original Assignee
현대위아 주식회사
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Priority to KR1020150091960A priority Critical patent/KR101691886B1/en
Application granted granted Critical
Publication of KR101691886B1 publication Critical patent/KR101691886B1/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
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness
    • 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
    • F16H57/0412—Cooling or heating; Control of temperature
    • F16H57/0415—Air cooling or ventilation; Heat exchangers; Thermal insulations
    • F16H57/0416—Air cooling or ventilation
    • 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

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

Abstract

The present invention relates to a vehicle decelerator. More specifically, the present invention relates to the vehicle decelerator having a ventilation chamber with an oil leakage preventing structure, preventing oil from being leaked from a ventilation chamber inside a decelerator case to the outside. According to the present invention, a front wheel is operated by an engine, and a rear wheel is operated by an electric motor. Moreover, the vehicle decelerator is provided between the electric motor and the rear wheel.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a reduction gear case for a vehicle having a ventilation chamber,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle speed reducer, and more particularly, to a vehicle speed reducer having a ventilation chamber having an oil leakage prevention structure that can prevent oil from leaking out of the vantilation chamber inside the speed reducer case.

Generally, a vehicle speed reducer is called a final reduction gear or differential case, and means a gear device that finally transmits the power of the engine to the wheel.

Further, the vehicle speed reducer is generally provided in the vehicle for driving the rear wheels of the four-wheel drive vehicle.

Recently, an electric four-wheel drive (e-4WD) vehicle in which the front wheels are driven by an engine during two-wheel drive and the rear wheels driven by an engine are driven by an electric motor at the time of four-

FIG. 1 is a view showing a conventional speed reducer 10 for an electric four-wheel drive vehicle, and FIG. 2 is a view showing a conventional speed reducer interior B-B 'for an electric four-wheel drive vehicle.

1 and 2, a conventional electric four-wheel-drive vehicle speed reducer 10 includes a case 11 having a differential gear set (not shown) therein and a ventilation A ventilation chamber 13 is fitted to the ventilation chamber 13 from the outside of the case 11 to discharge the air in the ventilation chamber 13 to the outside to adjust the pressure inside the case 11. [ And a ventilator (12).

On the other hand, in the conventional vehicle speed reducer 10, oil charged in the inside is churned by the rotation of a differential gear set (not shown) inside the case 11, and the differential gear set Lubrication.

At this time, the oil to be churned can be easily introduced into the ventilation chamber 13, so that the oil flows out to the outside during the operation of the ventilator 12.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to minimize the oil introduced into the ventilator chamber and discharge the oil back into the case, Which can be used in a vehicle.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided an air conditioner comprising: a case having a gear set therein; a ventilation chamber formed in a predetermined portion of the upper surface of the case to allow air in and out of the case; And a ventilator installed in the ventilation chamber so as to communicate with a space inside the ventilation chamber through a predetermined portion and to regulate the pressure inside the ventilation chamber by discharging the air inside the ventilation chamber to the outside, Wherein the ventilation chamber is formed with an inlet hole through which air can flow, and the lower surface of the ventilation chamber is inclined downward from the other side of the lower surface toward the one side of the lower surface to form an inclined surface, When the oil flows into the inflow hole, flows along the inclined surface, Provides a vehicle speed reducer characterized in that the stops.

In a preferred embodiment, the inflow hole is perforated in a direction crossing the direction in which the oil is churned and scattered by the gear set.

According to a preferred embodiment of the present invention, the ventilation chamber is provided with a partition wall (hereinafter referred to as 'first partition wall') dividing the internal space into at least two spaces, (Hereinafter, referred to as 'oil inflow space'), and a discharge hole is formed on the lower surface of the space of the other space (hereinafter referred to as 'oil discharge space').

According to a preferred embodiment of the present invention, the first partition is formed with a communication hole (hereinafter, referred to as 'first communication hole') communicating the oil inflow space and the oil discharge space, And is installed to communicate.

In a preferred embodiment, the ventilation chamber is further provided with a partition (hereinafter referred to as 'second partition') dividing the oil discharge space into a first oil discharge space and a second oil discharge space, A second communication hole (hereinafter, referred to as 'second communication hole') communicating the first oil discharge space and the second oil discharge space is formed in the second partition, and the discharge hole is formed in the first oil discharge space .

In a preferred embodiment, the oil inflow space and the first oil discharge space are separated by the first partition, the first oil discharge space and the second oil discharge space are divided by the second partition, The height of the first communication hole on the bottom surface of the ventilation chamber is higher than the height of the second communication hole.

In a preferred embodiment, the lengths of the inflow hole and the discharge hole in the inclined direction of the bottom surface of the ventilation chamber are longer than the lengths of the first communication hole and the second communication hole.

In a preferred embodiment, the gear set is a differential gear set, and the differential gear of the differential gear set is driven by an electric motor.

The present invention further provides an electric four-wheel drive vehicle, wherein the front wheel is driven by an engine, the rear wheel is driven by an electric motor, and the vehicle speed reducer is provided between the electric motor and the rear wheel.

The present invention has the following excellent effects.

According to the vehicle speed reducer of the present invention, the lower surface of the ventilation chamber is tilted so that even when the oil flows into the ventilation chamber, it can be quickly flown into the case, thereby preventing oil leakage.

In addition, according to the vehicle speed reducer of the present invention, the internal space of the ventilation chamber is divided into a plurality of spaces, the inflow of oil into the space communicating with the ventilator can be minimized, There is an advantage to be able to do.

1 is a view showing a conventional speed reducer for an electric four-wheel drive vehicle,
2 is a view showing the inside of a conventional speed reducer for an electric four-wheel drive vehicle,
3 is a side cross-sectional view of a vehicle speed reducer according to an embodiment of the present invention,
4 is a view showing the inside of a case of a vehicle speed reducer according to an embodiment of the present invention,
5 is a schematic view of a ventilation chamber of a vehicle speed reducer according to an embodiment of the present invention.

Although the terms used in the present invention have been selected as general terms that are widely used at present, there are some terms selected arbitrarily by the applicant in a specific case. In this case, the meaning described or used in the detailed description part of the invention The meaning must be grasped.

Hereinafter, the technical structure of the present invention will be described in detail with reference to preferred embodiments shown in the accompanying drawings.

However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Like reference numerals designate like elements throughout the specification.

FIG. 3 is a side sectional view of a vehicle speed reducer according to an embodiment of the present invention, and FIG. 4 is a view showing the inside of a case of a vehicle speed reducer according to an embodiment of the present invention.

3 and 4, a vehicle speed reducer 100 according to an embodiment of the present invention includes a case 110 having a gear set 111 therein, A ventilation chamber 120 through which the air in the case 110 can enter and exit the predetermined portion of the case 110 so as to communicate with the ventilation chamber 120, And a ventilator 130 for venting the air inside the ventilation chamber 120 to the outside to adjust the pressure inside the case 110.

Also, the gear set 111 can be connected to a rear wheel, and the differential gear 112 of the gear set 111 can be rotated by an electric motor.

That is, the vehicle speed reducer 100 according to an embodiment of the present invention may be a speed reducer for an electric four-wheel drive vehicle.

FIG. 5 is a schematic view of the ventilation chamber 120.

Referring to FIG. 5, the ventilation chamber 120 may be configured to allow the air in the case 110 to pass through the ventilator 130, while preventing oil in the case 110 from being discharged through the ventilator 130. ).

In FIG. 5, the front of the ventilation chamber 120 is shown as opened for convenience of explanation, but the cover is closed substantially in front of the ventilation chamber 120.

An inlet hole a is formed in one side 121ab of the bottom surface 121a of the ventilation chamber 120 so that air inside the case 110 can be uniquely formed.

That is, the air flowing into the inlet hole (a) is discharged to the outside through the ventilator (130), so that the pressure inside the case (110) is controlled.

The lower surface 121a of the ventilation chamber 120 is inclined downward by a predetermined angle? From the other side 121aa toward the one side 121ab.

This is to prevent the oil from being discharged to the ventilator 130 by causing the oil to flow into the inflow hole a again along the inclined surface when the oil flows into the inflow hole a.

Also, the inlet hole (a) is perforated in a direction (d1) crossing the direction (d2) in which the oil is held.

This is because when the oil is chunged by having the inner side surface s of the inflow hole a have an inclined surface in the piercing direction, the oil bounces off the inner side surface s and falls into the case 110 .

More specifically, a direction d1 in which the inflow hole (a) is perforated may be a direction perpendicular to a direction (d2) in which the oil is chucked.

The ventilation chamber 120 may have partition walls 124 and 125 for dividing the internal space of the ventilation chamber 120 into a plurality of spaces.

In FIG. 5, the barrier ribs 123 and 125 are formed of two barrier ribs 124 and 125, but only the first barrier rib 124 may be provided.

In addition, the partition walls 123 and 125 are spaced apart from each other in the vertical direction, and the inner space of the ventilation chamber 120 is divided into three spaces in the lateral direction.

The spaces may include an oil inflow space 121 defined by the first partition 123 and one side of the ventilation chamber 120 and a space between the first partition 123 and the second partition 125 And a second oil discharge space 123 formed by the second partition 125 and the other side of the ventilation chamber 120. The second oil discharge space 123 is formed by the first oil discharge space 122 and the second oil discharge space 123,

In addition, the oil inflow space 121, the first oil discharge space 12, and the second oil discharge space 123 are sequentially positioned in the direction in which the oil is held.

The inlet hole (a) is formed in the oil inflow space 121.

The first partition wall 123 is formed with a first communication hole b for allowing the oil inflow space 121 and the first oil discharge space 122 to communicate with each other.

The ventilator 130 communicates with the first oil discharge space 122 to discharge air from the first oil discharge space 122 to the outside.

In addition, the first communication hole (b) may be formed at the upper end of the first partition wall (123).

That is, the first partition wall 123 prevents the oil from falling into the first oil discharge space 122 even if the oil flows into the oil inlet space 121, and when the predetermined amount of oil is cool, It is possible to minimize leakage of oil to the ventilator 130 because the oil is overflowed into the oil discharge space 122.

It is preferable that the length l2 of the first communication hole b is smaller than the length l1 of the inlet hole a.

This is to induce the oil to be discharged again through the inflow hole (a) before the oil flows into the first communication hole (b) when oil flows into the oil inflow space (121).

The second partition 125 has a second communication hole c for communicating the first oil discharge space 122 and the second oil discharge space 123 with each other.

It is preferable that the second communication hole c is formed at the lower end of the second partition 125 and the height of the ventilation chamber 120 from the bottom of the first communication hole b It should be lower than the height.

This is to allow the oil to flow immediately into the second oil discharge space 123 when the oil passes over the first communication hole (b).

The bottom surface of the second oil discharge space 123 is provided with a discharge hole d through which the oil flowing in the first oil discharge space 122 can be discharged into the case 111.

In addition, the length of the discharge hole (d) is longer than the length of the second communication hole (c), so that the oil inside can be smoothly discharged.

That is, according to the present invention, the inflow of oil into the first oil discharge space 122 communicating with the ventilator 130 can be minimized, and even when oil flows into the first oil discharge space 122 Since the oil can be immediately discharged to the second oil discharge space 123, the oil discharged to the ventilator 130 can be minimized.

Further, the present invention can be provided as a complete four-wheel drive vehicle in which a rear wheel is driven by a vehicle speed reducer having a structure of a ventilator chamber 120 according to an embodiment of the present invention, The gear set 111 of the speed reducer 100 may be an electric four-wheel drive vehicle driven by an electric motor.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation in the present invention. Various changes and modifications will be possible.

100: Reducer for vehicle 110: Case
111: Gear set 112: Differential gear
120: Ventilation chamber 121: Oil inflow space
122: first oil discharge space 123: second oil discharge space
124: first partition 125: second partition
130: Ventilator

Claims (9)

delete delete delete delete delete delete A ventilation chamber formed in a predetermined portion of an inner upper surface of the case so as to allow air in and out of the case to pass therethrough and a ventilation chamber passing through a predetermined portion of the outer surface of the case and inside the ventilation chamber And a ventilator installed to communicate with the space and controlling the pressure inside the case by discharging the air inside the ventilation chamber to the outside,
Wherein the ventilation chamber has an inlet hole through which air can flow, and a lower surface of the ventilation chamber is inclined downward from the other side of the lower surface toward the one side of the lower surface to form an inclined surface,
When the oil in the case flows into the inflow hole, flows along the inclined surface and is discharged to the inflow hole,
The inlet hole being perforated in a direction crossing the direction in which the oil is churned and scattered by the gear set,
In the ventilation chamber, a partition wall (hereinafter referred to as 'first partition wall') for dividing an internal space into at least two spaces is provided, and the inlet hole is formed by a partition wall (Hereinafter, referred to as 'oil inflow space'), and a discharge hole is formed on the lower surface of the space of the other space (hereinafter referred to as 'oil discharge space'),
A communication hole (hereinafter, referred to as 'first communication hole') communicating the oil inflow space and the oil discharge space is formed in the first bank,
Wherein the ventilator is installed to communicate with the oil discharge space,
(Hereinafter referred to as 'second partition') for partitioning the oil discharge space into a first oil discharge space and a second oil discharge space is further provided inside the ventilation chamber, and the first partition A communication hole (hereinafter referred to as 'second communication hole') communicating the oil discharge space and the second oil discharge space is formed, the discharge hole is formed in the first oil discharge space,
Wherein the oil inflow space and the first oil discharge space are separated by the first partition wall and the first oil discharge space and the second oil discharge space are separated by the second partition wall, The height of the first communication hole is higher than the height of the second communication hole,
Wherein a length of the inflow hole and the discharge hole in an inclined direction of the bottom surface of the ventilation chamber is longer than a length of the first communication hole and the second communication hole.
8. The method of claim 7,
Wherein the gear set is a differential gear set, and the differential gear of the differential gear set is driven by an electric motor.
The front wheel is driven by an engine, the rear wheel is driven by an electric motor,
And the vehicle speed reducer of claim 8 is provided between the electric motor and the rear wheel.


KR1020150091960A 2015-06-29 2015-06-29 Reduction gear case for vehicle having ventilation chamber for preventing oil leakage KR101691886B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102184222B1 (en) * 2019-05-31 2020-11-27 현대위아 주식회사 The ventilation chamber of the power take-off unit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07208141A (en) * 1994-01-11 1995-08-08 Suzuki Motor Corp Engine for vehicle
JP2002200928A (en) * 2000-10-27 2002-07-16 Honda Motor Co Ltd Power transmission mechanism for four-wheel drive vehicle
JP2004068848A (en) * 2002-08-02 2004-03-04 Honda Motor Co Ltd Breather device of power train for electric automobile
JP2005061456A (en) * 2003-08-19 2005-03-10 Aisin Aw Co Ltd Air breather mechanism

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07208141A (en) * 1994-01-11 1995-08-08 Suzuki Motor Corp Engine for vehicle
JP2002200928A (en) * 2000-10-27 2002-07-16 Honda Motor Co Ltd Power transmission mechanism for four-wheel drive vehicle
JP2004068848A (en) * 2002-08-02 2004-03-04 Honda Motor Co Ltd Breather device of power train for electric automobile
JP2005061456A (en) * 2003-08-19 2005-03-10 Aisin Aw Co Ltd Air breather mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102184222B1 (en) * 2019-05-31 2020-11-27 현대위아 주식회사 The ventilation chamber of the power take-off unit

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