CA2542020A1 - Mounting structure of oil pump - Google Patents
Mounting structure of oil pump Download PDFInfo
- Publication number
- CA2542020A1 CA2542020A1 CA002542020A CA2542020A CA2542020A1 CA 2542020 A1 CA2542020 A1 CA 2542020A1 CA 002542020 A CA002542020 A CA 002542020A CA 2542020 A CA2542020 A CA 2542020A CA 2542020 A1 CA2542020 A1 CA 2542020A1
- Authority
- CA
- Canada
- Prior art keywords
- oil
- pump
- oil pump
- joint plug
- inlet port
- 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.)
- Abandoned
Links
- 239000003921 oil Substances 0.000 claims description 67
- 238000007789 sealing Methods 0.000 claims description 12
- 239000010687 lubricating oil Substances 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- 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
- F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
- F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
-
- 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
- F04C2/086—Carter
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/10—Outer members for co-operation with rotary pistons; Casings
-
- 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
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
To provide a mounting structure of an oil pump which can reduce the number of parts and the number of mounting steps required in mounting the oil pump to a housing of a lubricated section. Connecting ports are respectively connected through joint plugs to inlet ports formed on the upper surface of an oil pump. The joint plugs respectively have thin-walled cylindrical portions and circular flange portions formed at axially central positions of the respective cylindrical portions. The inlet ports are tapered in such a manner that the inner diameters of the inlet ports gradually increase toward opening ends thereof. One end portions of the joint plugs are preliminarily press-fitted with the inlet ports until the flange portions abut against the opening ends of the inlet ports, thereby achieving oil tightness. The other end portions of the joint plugs are oil-tightly connected through O-rings to the connecting ports.
Description
MOUNTING STRUCTURE OF OIL PUMP
FIELD OF THE INVENTION
The present invention relates to a mounting structure of an oil pump, and more particularly to a mounting structure of an oil pump which can make simple and reliable connection of oil inlet and outlet (inlet port and outlet port) of the oil pump to connected objects.
BACKGROUND OF THE INVENTION
Japanese Patent Laid-Open No. 2001-140614 discloses an oil pump for an internal combustion engine including a feed pump for supplying oil from an oil tank to various lubricated sections of the engine and a scavenge pump integrated with the feed pump for returning the oil staying at a bottom portion of the engine to the oil tank, wherein the feed pump and the scavenge pump have rotors coaxially mounted on a common drive shaft.
FIG. 5 is a sectional view showing a connecting structure between an inlet port (or outlet port) 71 of an oil pump and a connected object 72 in the related art. As shown in FIG. 5, the inlet port 71 and the connected object 72 are connected with each other through a joint plug 73. The joint plug 73 and the inlet port 71 are oil-tightly sealed by an O-ring 75, and the connected object 72 and the joint plug are oil-tightly sealed by an O-ring 74.
In the related art mentioned above, the joint plug and the two sealing members must be separately prepared in mounting the oil pump to a housing of a WH-12893/cs lubricated section. Further, it is necessary to prepare any positioning members such as dowel pins for relatively positioning the oil pump and the housing of the lubricated section. As a result, the number of parts and the number of mounting steps become large.
There is a need for the present invention to provide a mounting structure of an oil pump which can reduce the number of parts and the number of mounting steps required in mounting the oil pump to the housing of the lubricated section.
SUMMARY OF THE INVENTION
In a mounting structure of an oil pump for sucking a lubricating oil from an inlet port and feeding the lubricating oil under pressure from an outlet port, the present invention is characterized in the following points.
(1) The mounting structure includes a joint plug for oil-tightly connecting at least one of said inlet port and said outlet port to a connected object, said joint plug having one end portion preliminarily press-fitted with at least one of said inlet port and said outlet port and another end portion adapted to be oil-tightly connected to said connected object by using a sealing member.
(2) Said oil pump includes a feed pump and a scavenge pump integrated with each other, and said joint plug includes a first joint plug press-fitted with an inlet port of said feed pump and a second joint plug press-fitted with an inlet port of said scavenge pump, said first and second joint plugs having seat surfaces at the same level.
FIELD OF THE INVENTION
The present invention relates to a mounting structure of an oil pump, and more particularly to a mounting structure of an oil pump which can make simple and reliable connection of oil inlet and outlet (inlet port and outlet port) of the oil pump to connected objects.
BACKGROUND OF THE INVENTION
Japanese Patent Laid-Open No. 2001-140614 discloses an oil pump for an internal combustion engine including a feed pump for supplying oil from an oil tank to various lubricated sections of the engine and a scavenge pump integrated with the feed pump for returning the oil staying at a bottom portion of the engine to the oil tank, wherein the feed pump and the scavenge pump have rotors coaxially mounted on a common drive shaft.
FIG. 5 is a sectional view showing a connecting structure between an inlet port (or outlet port) 71 of an oil pump and a connected object 72 in the related art. As shown in FIG. 5, the inlet port 71 and the connected object 72 are connected with each other through a joint plug 73. The joint plug 73 and the inlet port 71 are oil-tightly sealed by an O-ring 75, and the connected object 72 and the joint plug are oil-tightly sealed by an O-ring 74.
In the related art mentioned above, the joint plug and the two sealing members must be separately prepared in mounting the oil pump to a housing of a WH-12893/cs lubricated section. Further, it is necessary to prepare any positioning members such as dowel pins for relatively positioning the oil pump and the housing of the lubricated section. As a result, the number of parts and the number of mounting steps become large.
There is a need for the present invention to provide a mounting structure of an oil pump which can reduce the number of parts and the number of mounting steps required in mounting the oil pump to the housing of the lubricated section.
SUMMARY OF THE INVENTION
In a mounting structure of an oil pump for sucking a lubricating oil from an inlet port and feeding the lubricating oil under pressure from an outlet port, the present invention is characterized in the following points.
(1) The mounting structure includes a joint plug for oil-tightly connecting at least one of said inlet port and said outlet port to a connected object, said joint plug having one end portion preliminarily press-fitted with at least one of said inlet port and said outlet port and another end portion adapted to be oil-tightly connected to said connected object by using a sealing member.
(2) Said oil pump includes a feed pump and a scavenge pump integrated with each other, and said joint plug includes a first joint plug press-fitted with an inlet port of said feed pump and a second joint plug press-fitted with an inlet port of said scavenge pump, said first and second joint plugs having seat surfaces at the same level.
(3) Said joint plug has a cylindrical portion and a circular flange portion formed at an axially central position of said cylindrical portion so as to have an outer diameter, said one end portion of said joint plug being press-fitted until said flange portion abuts against an opening end of at least one of said inlet port and said outlet port.
According to the present invention, the following effects can be exhibited.
WH-12893/cs (1) According to the present invention, the joint plug is preliminarily fixed by press-fitting to the inlet port or the outlet port of the oil pump to thereby achieve oil tightness without using any sealing members. Thus, unlike the related art requiring sealing members in mounting the oil pump, no sealing members are required. Furthermore, the joint plug is accurately positioned to the inlet or outlet port of the oil pump with no play, thereby exhibiting a positioning function. Accordingly, it is unnecessary to use any positioning members such as dowel pins for accurately positioning the oil pump to the connected object.
(2) According to an aspect of the invention, the first and second joint plugs have seat surfaces at the same level. Accordingly, even when the oil pump and the connected object are connected at two positions, the connection therebetween can be easily performed.
(3) According to the another aspect of the invention, the joint plug is press-fitted into the inlet port or the outlet port of the oil pump until the flange portion abuts against the opening end of the inlet or outlet port. Accordingly, the seat surface of the joint plug can be set at a constant level.
BRIEF DESCRIPTION OF THE DRAWINGS
Preferred embodiments of the invention are shown in the drawings, wherein:
FIG. 1 is a sectional view of an oil pump along a drive shaft thereof according to the present invention.
FIG. 2 is a view taken in the direction shown by an arrow Z1 in FIG. 1.
FIG. 3 is a view taken in the direction shown by an arrow Z2 in FIG. 1.
FIG. 4 is a sectional view showing a mounting structure of the oil pump.
FIG. 5 is a sectional view showing a connecting structure between an inlet or outlet port of an oil pump and an internal combustion engine in the related art.
WH-12893/cs DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
A preferred embodiment of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a sectional view of an oil pump 10 along a drive shaft 5 thereof according to the present invention, FIG. 2 is a view taken in the direction shown by an arrow Z1 in FIG. 1, and FIG. 3 is a view taken in the direction shown by an arrow Z2 in FIG. 1. FIG. 1 is a sectional view taken along the line A-A in FIG. 2. In this preferred embodiment, the oil pump 10 includes a feed pump and a scavenge pump coaxially integrated with each other.
The feed pump of the oil pump 10 includes a feed pump housing 3, and the scavenge pump of the oil pump 10 includes a first scavenge pump housing 1 and a second scavenge pump housing 4. An intermediate housing 2 is interposed between the first scavenge pump housing 1 and the feed pump housing 3. These housings 1, 2, 3, and 4 are oil-tightly joined together by using a plurality of screws 11, 12. The drive shaft 5 is rotatably supported to these housings 1, 2, 3, and 4 so as to vertically extend therethrough.
A first scavenge pump rotor 11 is supported to the drive shaft 5 in a pump chamber 11a of the first scavenge pump housing 1. A feed pump rotor 13 is supported to the drive shaft 5 in a pump chamber 13a of the feed pump housing 3. A second scavenge pump rotor 14 is supported to the drive shaft 5 in a pump chamber 14a of the second scavenge pump housing 4.
As shown in FIG. 2, the second scavenge pump housing 4 has two oil outlet ports 21 and 22 opening to the lower surface of the oil pump 10 as viewed in FIG. 1.
The outlet port 21 communicates with the pump chamber 13a of the feed pump to feed the oil through an oil filter (not shown) to a lubricated section. On the other hand, the outlet port 22 communicates with the pump chamber 11a of the first scavenge pump and the pump chamber 14a of the second scavenge pump to feed the oil through an oil cooler (not shown) to an oil tank (not shown). A
relief valve 20 is provided to relieve a discharge oil pressure of the feed pump to the first scavenge pump when the discharge oil pressure becomes higher than a predetermined value.
WH-12893/cs As shown in FIG. 3, the first scavenge pump housing 1 has three inlet ports 23, 24, and 25 opening to the upper surface of the oil pump 10. The inlet port 23 communicates with the pump chamber 11a of the first scavenge pump, and is connected to an oil pan (not shown) of an engine. The inlet port 24 communicates with the pump chamber 13a of the feed pump, and is connected to the oil tank. The inlet port 25 communicates with the pump chamber 14a of the second scavenge pump, and is connected to an oil strainer (not shown).
FIG. 4 is a sectional view showing mounting structure of the oil pump 10. As in the related art, a connecting port 41 communicating with the oil filter is connected through a joint plug 51 to the outlet port 21 of the oil pump 10, and a connecting port 42 communicating with the oil cooler is connected through a joint plug 52 to the outlet port 22 of the oil pump 10. The outlet port 21, the joint plug 51, and the connecting port 41 are oil-tightly sealed by a pair of O-rings 61, and the outlet port 22, the joint plug 52, and the connecting port 42 are oil-tightly sealed by a pair of O-rings 62.
In contrast, a connecting port 43 communicating with the oil pan is connected through a joint plug 53 to the inlet port 23 of the oil pump 10, and a connecting port 44 communicating with the oil tank is connected through a joint plug 54 to the inlet port 24 of the oil pump 10. The joint plug 53 has a thin-walled cylindrical portion and a circular flange portion 53a formed at an axially central position of the cylindrical portion so as to have an outer diameter larger than that of the cylindrical portion. Similarly, the joint plug 54 has a thin-walled cylindrical portion and a circular flange portion 54a formed at an axially central position of the cylindrical portion so as to have an outer diameter larger than that of the cylindrical portion.
The inlet port 23 is tapered in such a manner that the inner diameter of the inlet port 23 gradually increases toward an opening end of the inlet port 23.
Similarly, the inlet port 24 is tapered in such a manner that the inner diameter of the inlet port 24 gradually increases toward an opening end of the inlet port 24. One end portion of the joint plug 53 is preliminarily press-fitted with the inlet port 23 until WH-12893/cs the flange portion 53a abuts against the opening end of the inlet port 23, thereby achieving oil tightness. Similarly, one end portion of the joint plug 54 is preliminarily press-fitted with the inlet port 24 until the flange portion 54a abuts against the opening end of the inlet port 24, thereby achieving oil tightness.
For the purpose of simple connection of the other end portions of the joint plugs 53 and 54 to the respective connecting ports 43 and 44, the seat surfaces of the joint plugs 53 and 54 have the same level, i.e., the upper surfaces of the flange portions 53a and 54a of the joint plugs 53 and 54 have the same level. An O-ring 63 is fitted with the other end portion of the joint plug 53 so as to abut against the flange portion 53a, so that the connecting port 43 is oil-tightly connected to the joint plug 53 by a sealing function achieved by the combination of the flange portion 53a and the O-ring 63. Similarly, an O-ring 64 is fitted with the other end portion of the joint plug 54 so as to abut against the flange portion 54a, so that the connecting port 44 is oil-tightly connected to the joint plug 54 by a sealing function achieved by the combination of the flange portion 54a and the O-ring 64.
In operation, engine power or motor power is transmitted to a sprocket 30 connected to one end of the drive shaft 5 to thereby rotate the drive shaft 5.
As a result, the lubricating oil is sucked into the oil pump 10 from the inlet ports 23, 24, and 25 by the suction forces of the feed pump and the scavenge pump. The lubricating oil supplied into the oil pump 10 is pressurized in the oil pump 10, and then fed under pressure from the outlet ports 21 and 22 to the oil cooler and the lubricated section.
According to this preferred embodiment, the joint plugs 53 and 54 are preliminarily fixed by press fitting to the inlet ports 23 and 24, respectively, to thereby achieve oil tightness without using any sealing members. Thus, unlike the related art, no sealing members are required between the inlet ports 23 and 24 and the joint plugs 53 and 54. Furthermore, the joint plugs 53 and 54 are accurately positioned to the inlet ports 23 and 24 of the oil pump 10 with no play, thereby exhibiting a positioning function. Accordingly, it is unnecessary to use any positioning members such as dowel pins for accurately positioning the oil pump to the connected object.
WH-12893/cs -7_ While the joint plugs 53 and 54 characteristic in the present invention are press-fitted with only the inlet ports 23 and 24 of the oil pump 10 in this preferred embodiment, the present invention is not limited to this preferred embodiment, but the joint plugs according to the present invention may be press-fitted with only the outlet ports 21 and 22 or both the inlet ports 23 and 24 and the outlet ports 21 and 22.
Although various preferred embodiments of the present invention have been described herein in detail, it will be appreciated by those skilled in the art, that variations may be made thereto without departing from the spirit of the invention or the scope of the appended claims.
WH-12893/cs
According to the present invention, the following effects can be exhibited.
WH-12893/cs (1) According to the present invention, the joint plug is preliminarily fixed by press-fitting to the inlet port or the outlet port of the oil pump to thereby achieve oil tightness without using any sealing members. Thus, unlike the related art requiring sealing members in mounting the oil pump, no sealing members are required. Furthermore, the joint plug is accurately positioned to the inlet or outlet port of the oil pump with no play, thereby exhibiting a positioning function. Accordingly, it is unnecessary to use any positioning members such as dowel pins for accurately positioning the oil pump to the connected object.
(2) According to an aspect of the invention, the first and second joint plugs have seat surfaces at the same level. Accordingly, even when the oil pump and the connected object are connected at two positions, the connection therebetween can be easily performed.
(3) According to the another aspect of the invention, the joint plug is press-fitted into the inlet port or the outlet port of the oil pump until the flange portion abuts against the opening end of the inlet or outlet port. Accordingly, the seat surface of the joint plug can be set at a constant level.
BRIEF DESCRIPTION OF THE DRAWINGS
Preferred embodiments of the invention are shown in the drawings, wherein:
FIG. 1 is a sectional view of an oil pump along a drive shaft thereof according to the present invention.
FIG. 2 is a view taken in the direction shown by an arrow Z1 in FIG. 1.
FIG. 3 is a view taken in the direction shown by an arrow Z2 in FIG. 1.
FIG. 4 is a sectional view showing a mounting structure of the oil pump.
FIG. 5 is a sectional view showing a connecting structure between an inlet or outlet port of an oil pump and an internal combustion engine in the related art.
WH-12893/cs DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
A preferred embodiment of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a sectional view of an oil pump 10 along a drive shaft 5 thereof according to the present invention, FIG. 2 is a view taken in the direction shown by an arrow Z1 in FIG. 1, and FIG. 3 is a view taken in the direction shown by an arrow Z2 in FIG. 1. FIG. 1 is a sectional view taken along the line A-A in FIG. 2. In this preferred embodiment, the oil pump 10 includes a feed pump and a scavenge pump coaxially integrated with each other.
The feed pump of the oil pump 10 includes a feed pump housing 3, and the scavenge pump of the oil pump 10 includes a first scavenge pump housing 1 and a second scavenge pump housing 4. An intermediate housing 2 is interposed between the first scavenge pump housing 1 and the feed pump housing 3. These housings 1, 2, 3, and 4 are oil-tightly joined together by using a plurality of screws 11, 12. The drive shaft 5 is rotatably supported to these housings 1, 2, 3, and 4 so as to vertically extend therethrough.
A first scavenge pump rotor 11 is supported to the drive shaft 5 in a pump chamber 11a of the first scavenge pump housing 1. A feed pump rotor 13 is supported to the drive shaft 5 in a pump chamber 13a of the feed pump housing 3. A second scavenge pump rotor 14 is supported to the drive shaft 5 in a pump chamber 14a of the second scavenge pump housing 4.
As shown in FIG. 2, the second scavenge pump housing 4 has two oil outlet ports 21 and 22 opening to the lower surface of the oil pump 10 as viewed in FIG. 1.
The outlet port 21 communicates with the pump chamber 13a of the feed pump to feed the oil through an oil filter (not shown) to a lubricated section. On the other hand, the outlet port 22 communicates with the pump chamber 11a of the first scavenge pump and the pump chamber 14a of the second scavenge pump to feed the oil through an oil cooler (not shown) to an oil tank (not shown). A
relief valve 20 is provided to relieve a discharge oil pressure of the feed pump to the first scavenge pump when the discharge oil pressure becomes higher than a predetermined value.
WH-12893/cs As shown in FIG. 3, the first scavenge pump housing 1 has three inlet ports 23, 24, and 25 opening to the upper surface of the oil pump 10. The inlet port 23 communicates with the pump chamber 11a of the first scavenge pump, and is connected to an oil pan (not shown) of an engine. The inlet port 24 communicates with the pump chamber 13a of the feed pump, and is connected to the oil tank. The inlet port 25 communicates with the pump chamber 14a of the second scavenge pump, and is connected to an oil strainer (not shown).
FIG. 4 is a sectional view showing mounting structure of the oil pump 10. As in the related art, a connecting port 41 communicating with the oil filter is connected through a joint plug 51 to the outlet port 21 of the oil pump 10, and a connecting port 42 communicating with the oil cooler is connected through a joint plug 52 to the outlet port 22 of the oil pump 10. The outlet port 21, the joint plug 51, and the connecting port 41 are oil-tightly sealed by a pair of O-rings 61, and the outlet port 22, the joint plug 52, and the connecting port 42 are oil-tightly sealed by a pair of O-rings 62.
In contrast, a connecting port 43 communicating with the oil pan is connected through a joint plug 53 to the inlet port 23 of the oil pump 10, and a connecting port 44 communicating with the oil tank is connected through a joint plug 54 to the inlet port 24 of the oil pump 10. The joint plug 53 has a thin-walled cylindrical portion and a circular flange portion 53a formed at an axially central position of the cylindrical portion so as to have an outer diameter larger than that of the cylindrical portion. Similarly, the joint plug 54 has a thin-walled cylindrical portion and a circular flange portion 54a formed at an axially central position of the cylindrical portion so as to have an outer diameter larger than that of the cylindrical portion.
The inlet port 23 is tapered in such a manner that the inner diameter of the inlet port 23 gradually increases toward an opening end of the inlet port 23.
Similarly, the inlet port 24 is tapered in such a manner that the inner diameter of the inlet port 24 gradually increases toward an opening end of the inlet port 24. One end portion of the joint plug 53 is preliminarily press-fitted with the inlet port 23 until WH-12893/cs the flange portion 53a abuts against the opening end of the inlet port 23, thereby achieving oil tightness. Similarly, one end portion of the joint plug 54 is preliminarily press-fitted with the inlet port 24 until the flange portion 54a abuts against the opening end of the inlet port 24, thereby achieving oil tightness.
For the purpose of simple connection of the other end portions of the joint plugs 53 and 54 to the respective connecting ports 43 and 44, the seat surfaces of the joint plugs 53 and 54 have the same level, i.e., the upper surfaces of the flange portions 53a and 54a of the joint plugs 53 and 54 have the same level. An O-ring 63 is fitted with the other end portion of the joint plug 53 so as to abut against the flange portion 53a, so that the connecting port 43 is oil-tightly connected to the joint plug 53 by a sealing function achieved by the combination of the flange portion 53a and the O-ring 63. Similarly, an O-ring 64 is fitted with the other end portion of the joint plug 54 so as to abut against the flange portion 54a, so that the connecting port 44 is oil-tightly connected to the joint plug 54 by a sealing function achieved by the combination of the flange portion 54a and the O-ring 64.
In operation, engine power or motor power is transmitted to a sprocket 30 connected to one end of the drive shaft 5 to thereby rotate the drive shaft 5.
As a result, the lubricating oil is sucked into the oil pump 10 from the inlet ports 23, 24, and 25 by the suction forces of the feed pump and the scavenge pump. The lubricating oil supplied into the oil pump 10 is pressurized in the oil pump 10, and then fed under pressure from the outlet ports 21 and 22 to the oil cooler and the lubricated section.
According to this preferred embodiment, the joint plugs 53 and 54 are preliminarily fixed by press fitting to the inlet ports 23 and 24, respectively, to thereby achieve oil tightness without using any sealing members. Thus, unlike the related art, no sealing members are required between the inlet ports 23 and 24 and the joint plugs 53 and 54. Furthermore, the joint plugs 53 and 54 are accurately positioned to the inlet ports 23 and 24 of the oil pump 10 with no play, thereby exhibiting a positioning function. Accordingly, it is unnecessary to use any positioning members such as dowel pins for accurately positioning the oil pump to the connected object.
WH-12893/cs -7_ While the joint plugs 53 and 54 characteristic in the present invention are press-fitted with only the inlet ports 23 and 24 of the oil pump 10 in this preferred embodiment, the present invention is not limited to this preferred embodiment, but the joint plugs according to the present invention may be press-fitted with only the outlet ports 21 and 22 or both the inlet ports 23 and 24 and the outlet ports 21 and 22.
Although various preferred embodiments of the present invention have been described herein in detail, it will be appreciated by those skilled in the art, that variations may be made thereto without departing from the spirit of the invention or the scope of the appended claims.
WH-12893/cs
Claims (4)
1. A mounting structure of an oil pump for sucking a lubricating oil from an inlet port and feeding said lubricating oil under pressure from an outlet port, said mounting structure comprising: a joint plug for oil-tightly connecting at least one of said inlet port and said outlet port to a connected object;
said joint plug having one end portion preliminarily press-fitted with at least one of said inlet port and said outlet port and another end portion adapted to be oil-tightly connected to said connected object by using a sealing member.
said joint plug having one end portion preliminarily press-fitted with at least one of said inlet port and said outlet port and another end portion adapted to be oil-tightly connected to said connected object by using a sealing member.
2. The mounting structure of an oil pump according to claim 1, wherein: said oil pump comprises a feed pump and a scavenge pump integrated with each other; and said joint plug comprises a first joint plug press-fitted with an inlet port of said feed pump and a second joint plug press-fitted with an inlet port of said scavenge pump, said first and second joint plugs having seat surfaces at the same level.
3. The mounting structure of an oil pump according to claim 1 or 2, wherein said joint plug has a cylindrical portion and a circular flange portion formed at an axially central position of said cylindrical portion so as to have an outer diameter larger than that of said cylindrical portion, said one end portion of said joint plug being press-fitted until said flange portion abuts against an opening end of at least one of said inlet port and said outlet port.
4. The mounting structure of an oil pump according to claim 3, wherein the other end portion of said joint plug is oil-tightly connected to said connected object through a sealing function obtained by combining said flange portion and an O-ring as said sealing member.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005142482A JP2006316760A (en) | 2005-05-16 | 2005-05-16 | Oil pump assembly structure |
| JP2005-142482 | 2005-05-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2542020A1 true CA2542020A1 (en) | 2006-11-16 |
Family
ID=37418045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002542020A Abandoned CA2542020A1 (en) | 2005-05-16 | 2006-04-05 | Mounting structure of oil pump |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20060254860A1 (en) |
| JP (1) | JP2006316760A (en) |
| AU (1) | AU2006201524A1 (en) |
| CA (1) | CA2542020A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007041584A1 (en) * | 2007-09-01 | 2009-03-05 | Zf Friedrichshafen Ag | Arrangement of an electrically operated oil pump of an automatic transmission |
| JP5525303B2 (en) * | 2010-03-30 | 2014-06-18 | 本田技研工業株式会社 | Engine oil recovery device |
| CN109489907B (en) * | 2018-12-07 | 2023-11-07 | 重庆东京散热器有限公司 | Oil chamber airtight detection sealing device for oil cooler |
| CN115711227B (en) * | 2022-11-16 | 2026-03-10 | 四川航天世源科技有限公司 | Gearbox oil pump of integrated form birotor structure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS621378Y2 (en) * | 1980-06-30 | 1987-01-13 | ||
| US6247440B1 (en) * | 1997-05-12 | 2001-06-19 | Cummins Engine Ip, Inc. | Oil drain tube with annular seal |
| US6523570B2 (en) * | 2000-05-04 | 2003-02-25 | Parker-Hannifin Corp. | Manifold for valve assembly |
| JP2001355579A (en) * | 2000-06-12 | 2001-12-26 | Sanshin Ind Co Ltd | Oil pump structure for engine |
| US20030230894A1 (en) * | 2002-06-13 | 2003-12-18 | Cleveland Rafael L. | Brazeless connector for fluid transfer assemblies |
| JP2005016510A (en) * | 2003-06-03 | 2005-01-20 | Yamaha Motor Co Ltd | Engine lubrication equipment |
-
2005
- 2005-05-16 JP JP2005142482A patent/JP2006316760A/en active Pending
-
2006
- 2006-04-05 CA CA002542020A patent/CA2542020A1/en not_active Abandoned
- 2006-04-11 AU AU2006201524A patent/AU2006201524A1/en not_active Abandoned
- 2006-05-15 US US11/433,585 patent/US20060254860A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| AU2006201524A1 (en) | 2006-11-30 |
| US20060254860A1 (en) | 2006-11-16 |
| JP2006316760A (en) | 2006-11-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7290995B2 (en) | Tandem type trochoid pump and method of assembling the same | |
| US5788381A (en) | Rotary shaft lubricating structure | |
| US10302085B2 (en) | Supercharger with air vent pathway to engine | |
| JP2001504910A (en) | Pump device for high pressure fuel supply in fuel injection mechanism of internal combustion engine | |
| JP6728228B2 (en) | Screw compressors and compressor elements and gearboxes utilized by screw compressors | |
| US5152264A (en) | Internal combustion engine oil pump with cover | |
| WO2003078801A1 (en) | Engine valve moving device | |
| JPH10196337A (en) | Engine lubricating oil passage structure | |
| WO2003071102A1 (en) | Lubrication device of engine | |
| US6886665B2 (en) | Lubrication system valve | |
| CA2542020A1 (en) | Mounting structure of oil pump | |
| EP1063397A2 (en) | Pump housing for internal combustion engine | |
| JP3547242B2 (en) | Vane pump | |
| US6589025B2 (en) | Oil pump structure of an engine | |
| KR102140323B1 (en) | Electronic Oil Pump | |
| CN102257275B (en) | Internal gear pump and internal combustion engine and fuel injection system for internal combustion engine | |
| US20040156729A1 (en) | Feed and scavenge pump arrangement | |
| JP7855140B2 (en) | Pump mounting structure | |
| JP4629586B2 (en) | Balancer device | |
| CN115288824B (en) | Engine and motorcycle | |
| JPH1113641A (en) | Oil pump | |
| KR100356049B1 (en) | Oilpump apparatus | |
| RU74978U1 (en) | TWO-SECTION CENTRIFUGAL-GEAR PUMP | |
| JP2006170149A (en) | Tandem oil pump | |
| FR3073567A1 (en) | SYSTEM OF TWO TURBOCOMPRESSORS CONNECTED IN SERIES |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |