KR20170074443A - Oil pump for vehicle - Google Patents
Oil pump for vehicle Download PDFInfo
- Publication number
- KR20170074443A KR20170074443A KR1020150183719A KR20150183719A KR20170074443A KR 20170074443 A KR20170074443 A KR 20170074443A KR 1020150183719 A KR1020150183719 A KR 1020150183719A KR 20150183719 A KR20150183719 A KR 20150183719A KR 20170074443 A KR20170074443 A KR 20170074443A
- Authority
- KR
- South Korea
- Prior art keywords
- oil
- press
- oil seal
- shaft
- oil pump
- Prior art date
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Images
Classifications
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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
- F16N—LUBRICATING
- F16N13/00—Lubricating-pumps
- F16N13/20—Rotary pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/02—Pressure lubrication using lubricating pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
- F04C15/0023—Axial sealings for working fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/082—Details specially related to intermeshing engagement type machines or pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2210/00—Fluid
- F04C2210/14—Lubricant
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The present invention relates to an oil pump for a vehicle, which includes a shaft engaging portion to which a shaft is engaged and an oil seal press-in portion to which an oil seal is press-fitted so as to suck the oil and pressurize the oil to an engine or a transmission of a vehicle. And at least one oil passage connecting the shaft coupling portion and the torque converter is formed so as to move the oil sucked into the oil pump to the torque converter, And the torque converter is prevented from being narrowed due to the provision of the bearing in the shaft coupling portion.
Description
BACKGROUND OF THE
The engine or the transmission of the vehicle is provided with an oil pump for supplying engine oil or transmission oil.
The oil pump is driven by a gear or a chain by a crankshaft or a camshaft, and can be classified into a rotary pump, a gear pump, a plunger pump, and a vane pump depending on the structure.
In general, a Gerotor oil pump, which is one of the rotary pumps, is widely used.
The following
For example, Figure 1 is a cross-sectional view of a prior art gerotor oil pump.
As shown in FIG. 1, the conventional
The gerotor (3) includes an internal gear (5) and an external gear (6) in which the internal gear (5) is in contact.
The
Here, the number of teeth of the internal gear 5 is set to be smaller than the number of teeth of the
Such a gerotor oil pump is simple in structure and has advantages of miniaturization because it has a large discharge flow rate per one rotation as compared with other pumps of the same size.
Accordingly, the Gerotor oil pump is widely used not only as a supply source of engine lubricating oil for an automobile, a power transmission device, and a hydraulic pressure source of an automatic transmission, but also the application range thereof in various hydraulic systems is expanding due to development of processing technology.
2 is an enlarged cross-sectional view of the shaft coupling portion of the automotive oil pump shown in Fig.
2, a
When the bearing is applied to the inner circumferential surface of the shaft coupling portion of the oil pump according to the related art for smooth rotation of the
As a result, the oil pump for a vehicle according to the prior art has a problem in that the oil lubrication space due to application of the bearings becomes narrow and the oil can not be smoothly supplied to the engine or the transmission.
And Fig. 3 is a partially enlarged cross-sectional view showing an enlarged upper end portion of the housing.
3, a conventional oil pump for a vehicle has a structure in which a certain gap is formed between the
An object of the present invention is to provide a vehicle oil pump capable of securing an oil lubrication space when an input shaft is assembled.
It is another object of the present invention to provide a vehicle oil pump capable of improving a coupling force between an oil seal and a pump housing to maintain a coupled state even when an external impact is applied.
In order to achieve the above object, a vehicle oil pump according to the present invention includes a shaft coupling portion to which a shaft is coupled and an oil seal press-in portion into which an oil seal is press-fitted, and sucks oil and pressurizes the oil to an engine or a transmission And the shaft coupling portion is provided with a bearing for supporting a rotation of a shaft for transmitting a driving force and at least one or more oil passages connecting the shaft coupling portion and the torque converter to move the oil sucked into the oil pump into the torque converter, And oil is supplied to the torque converter through the oil passage to secure a lubricating space.
The oil seal press-in portion is formed in a cylindrical shape so as to provide a press-in space in which an oil seal is press-fitted therein. A lower end of the press-in space is formed with a step for receiving a lower end of the oil seal. And is formed in a circular ring shape along the inner peripheral surface.
And an inner circumferential surface of the oil seal press-fit portion is formed with grooves formed outward in the press-fit space so as to fill the oil therein to increase the separating force of the oil seal.
As described above, according to the oil pump for a vehicle according to the present invention, a flow path is formed between the shaft coupling portion and the torque converter to prevent the oil movement path from being narrowed due to the bearing installation in the shaft coupling portion Loses.
Thus, according to the present invention, even if a bearing is provided in the shaft coupling portion, an oil lubrication space capable of smoothly supplying the oil sucked in through the oil passage into the torque converter can be effectively obtained.
According to the present invention, a step is formed at the lower end of the oil seal press-in portion to support the lower end of the oil seal, whereby the coupling force between the oil seal and the pump housing can be improved.
Thus, according to the present invention, it is possible to prevent the oil seal from tilting due to an external impact, thereby stably maintaining the engagement state between the oil seal and the pump housing.
According to the present invention, grooves are formed in the inner circumferential surface of the oil seal press-in portion to fill the oil to form a pressure, whereby the effect of removing the oil seal can be improved.
1 is a cross-sectional view of a conventional gerotor oil pump,
Fig. 2 is an enlarged cross-sectional view of the shaft coupling portion of the automotive oil pump shown in Fig. 1,
3 is a partially enlarged cross-sectional view showing an enlarged upper end portion of the housing,
4 is a sectional view of a shaft coupling portion of an automotive oil pump according to a preferred embodiment of the present invention,
FIG. 5 is a view showing a state where a shaft is coupled to the shaft coupling portion shown in FIG. 4;
6 is an enlarged cross-sectional view of an oil seal coupling portion of an oil pump for a vehicle according to a preferred embodiment of the present invention.
Hereinafter, a vehicle oil pump according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.
In the present embodiment, the structure of the oil pump for a vehicle will be described by using the structure of the gerotor oil pump shown in Fig.
However, the present invention is not limited thereto.
That is, it should be noted that the present invention can be changed not only to a gerotor oil pump but also to various types of oil pumps such as a rotary oil pump, a gear oil pump, a plunger oil pump, and a vane oil pump.
Hereinafter, terms indicating directions such as 'left', 'right', 'forward', 'rearward', 'upward' and 'downward' are defined as indicating respective directions based on the states shown in the respective drawings do.
FIG. 4 is a cross-sectional view of a shaft coupling portion of a vehicular oil pump according to a preferred embodiment of the present invention, and FIG. 5 is a view illustrating a shaft coupled to the shaft coupling portion shown in FIG.
In the oil pump for a vehicle according to the preferred embodiment of the present invention, as shown in FIG. 4, the
5, when the
Accordingly, in the present embodiment, at least one
The
For example, the
As described above, the present invention forms a flow path between the shaft coupling portion and the torque converter, thereby preventing the oil movement path from becoming narrow due to the bearing installation in the shaft coupling portion.
Accordingly, even when a bearing is provided in the shaft coupling portion, the oil lubrication space capable of smoothly supplying the oil sucked in through the oil passage into the torque converter can be effectively secured.
6 is an enlarged cross-sectional view of an oil seal coupling portion of a vehicular oil pump according to a preferred embodiment of the present invention.
The
The oil seal press-in
A
The
At the same time, the
The
The
As described above, according to the present invention, a step is formed at the lower end of the oil seal press-in portion to support the lower end of the oil seal, thereby improving the coupling force between the oil seal and the pump housing.
Accordingly, the present invention can prevent the oil seal from tilting due to an external impact, thereby stably maintaining the state of engagement between the oil seal and the pump housing.
Further, according to the present invention, grooves are formed on the inner circumferential surface of the oil seal press-in portion to fill the oil to form a pressure, so that the oil seal can be removed.
Next, a coupling structure and an operation method of a vehicular oil pump according to a preferred embodiment of the present invention will be described in detail.
First, as shown in Figs. 4 and 5, the
At this time, the
Therefore, when the
As shown in Fig. 6, the
At this time, a
Therefore, since the lower end portion of the
On the other hand, the
Through the above-described process, the present invention forms a flow path between the shaft coupling portion and the torque converter, thereby preventing the oil movement path from becoming narrow due to the bearing installation in the shaft coupling portion.
According to the present invention, a step is formed at the lower end of the oil seal press-in portion to support the lower end of the oil seal, thereby enhancing the coupling force between the oil seal and the pump housing and forming a groove in the inner circumference of the oil seal press- Thereby increasing the detachment force of the oil seal.
Although the invention made by the present inventors has been described concretely with the above embodiments, the present invention is not limited to the above embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.
Although the configuration of the gerotor oil pump has been described in the above embodiments, the present invention is not limited thereto.
That is, the present invention can be modified to apply various types of oil pumps, such as a rotary oil pump, a gear oil pump, a plunger oil pump, and a vane oil pump, as well as a gerotor oil pump.
The present invention forms a passage between the shaft engaging portion and the torque converter to prevent the oil moving path from being narrowed due to bearing installation inside the shaft engaging portion and to form a step at the lower end of the oil seal press- Thereby improving the coupling force between the oil seal and the pump housing, and forming grooves on the inner circumferential surface of the oil seal press-in portion so as to increase the separation force of the oil seal.
1: Automotive oil pump 2: Shaft
3: Gerotor 4: Housing
5: internal gear 6: external gear
7: shaft coupling part 8: bush
9: Oil seal
10: shaft coupling portion 11: bearing
12: Euro
20: Oil seal press-in portion 21: Press-fit space
22: step 23: groove
Claims (3)
Wherein the shaft coupling portion is provided with a bearing for supporting rotation of a shaft for transmitting driving force,
At least one oil passage for connecting the shaft coupling portion and the torque converter is formed so as to move the oil sucked into the oil pump to the torque converter,
And the oil is supplied to the torque converter through the oil passage to secure a lubricating space.
Wherein the oil seal press-in portion is formed in a cylindrical shape so as to provide a press-fit space in which an oil seal is press-
A step is formed at a lower end portion of the press-fitting space in which the lower end of the oil seal is seated,
Wherein the step is formed in a circular ring shape along an inner peripheral surface at a lower end portion of the press-fit space.
Wherein an inner circumferential surface of the oil seal press-fit portion is formed with a groove formed outwardly from the press-fit space so as to fill the oil therein to increase the releasing force of the oil seal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150183719A KR101759487B1 (en) | 2015-12-22 | 2015-12-22 | Oil pump for vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150183719A KR101759487B1 (en) | 2015-12-22 | 2015-12-22 | Oil pump for vehicle |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20170074443A true KR20170074443A (en) | 2017-06-30 |
KR101759487B1 KR101759487B1 (en) | 2017-07-19 |
Family
ID=59279588
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020150183719A KR101759487B1 (en) | 2015-12-22 | 2015-12-22 | Oil pump for vehicle |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR101759487B1 (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006322589A (en) * | 2005-05-20 | 2006-11-30 | Honda Motor Co Ltd | Internal combustion engine with torque converter |
JP2010150958A (en) | 2008-12-24 | 2010-07-08 | Kayaba Ind Co Ltd | Vane pump |
-
2015
- 2015-12-22 KR KR1020150183719A patent/KR101759487B1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
KR101759487B1 (en) | 2017-07-19 |
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