Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines
  • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
  • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
  • B60K6/40—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the assembly or relative disposition of components
  • B60K6/405—Housings
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K5/00—Casings; Enclosures; Supports
  • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
  • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
  • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines
  • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
  • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
  • B60K6/44—Series-parallel type
  • B60K6/445—Differential gearing distribution type
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
  • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
  • B60L15/2054—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed by controlling transmissions or clutches
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L50/00—Electric propulsion with power supplied within the vehicle
  • B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
  • B60L50/16—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with provision for separate direct mechanical propulsion
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L50/00—Electric propulsion with power supplied within the vehicle
  • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
  • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
  • B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K1/00—Arrangement or mounting of electrical propulsion units
  • B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K1/00—Arrangement or mounting of electrical propulsion units
  • B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
  • F02N11/00—Starting of engines by means of electric motors
  • F02N11/04—Starting of engines by means of electric motors the motors being associated with current generators
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
  • F02N2250/00—Problems related to engine starting or engine's starting apparatus
  • F02N2250/08—Lubrication of starters; Sealing means for starters
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K9/00—Arrangements for cooling or ventilating
  • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/60—Other road transportation technologies with climate change mitigation effect
  • Y02T10/62—Hybrid vehicles
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/60—Other road transportation technologies with climate change mitigation effect
  • Y02T10/64—Electric machine technologies in electromobility
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/60—Other road transportation technologies with climate change mitigation effect
  • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/60—Other road transportation technologies with climate change mitigation effect
  • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/60—Other road transportation technologies with climate change mitigation effect
  • Y02T10/72—Electric energy management in electromobility
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
  • Y02T90/10—Technologies relating to charging of electric vehicles
  • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

Definitions

• the present invention generally relates to an oil path structure and, more specifically, to an oil path structure having an oil amount adjusting member for limiting amount of oil arranged on the path.
• Japanese Patent Laying-Open No. 10-169773 discloses a transmission operating device aimed at facilitating reduction in size and cost.
• the transmission operating device disclosed in this reference includes a cylinder housing having cylinder side flow passages formed therein, and a valve housing having valve side flow passages communicated with the cylinder side flow passages formed therein.
• an annular sealing member surrounding the outer periphery of the flow passage is arranged.
• Japanese Patent Laying-Open No. 9-79118 discloses a motor generator of internal combustion engine aimed at suppressing temperature increase of a stator coil without increasing the size or the number of parts.
• pressure fluid is caused to flow through the cylinder side and valve side flow passages.
• a method may be adopted that uses a plug having a hole of smaller diameter than the flow path diameter.
• the plug is press-fit into the flow path, and the pressed-in plug is fixed by caulking.
• the annular sealing member is arranged for sealing the flow passage between the two housings. Therefore, it is possible that the annular sealing member might be damaged by burr or fin of metal at the time of caulking and the sealing of flow passages might be lost.
• processing of a hole having a diameter different from that of the flow passage must be done in the housing, which requires high processing accuracy. This possibly leads to increased cost of manufacturing,
• An object of the present invention is to solve the above-described problems and to provide an oil path structure that adjusts flow rate with a simple structure while ensuring reliable sealing.
• the present invention provides an oil path structure including: a first member having a joint surface, and having a first oil path opened to the joint surface formed therein; a second member having a second oil path formed therein and joined to the joint surface such that the first oil path and the second oil path communicate with each other; an annular sealing member sealing between the first oil path and the second oil path; and an oil amount adjusting member limiting an amount of oil flowing through the oil path.
• the second member has an accommodating portion formed at a position adjacent to the joint surface and on route of the second oil path. In the accommodating portion, the annular sealing member in contact with the joint surface and the oil amount adjusting member positioned on a side of the annular sealing member opposite to the joint surface are arranged. The oil amount adjusting member is sandwiched between the annular sealing member and a wall surface of the second member defining the accommodating portion.
• the oil amount adjusting member is arranged together with the annular sealing member in the accommodating portion, and therefore, it becomes unnecessary to provide a portion for arranging the oil amount adjusting member separate from the accommodating portion. Further, the oil amount adjusting member is held sandwiched between the annular sealing member and a wall surface of the second member, and therefore, it is unnecessary to fix the oil amount adjusting member on the second member. Consequently, the process performed on the second member can be simplified, and the assembly of the oil amount adjusting member is facilitated. Further, the annular sealing member is provided between the joint surface of the first member and the oil amount adjusting member while being in contact with the joint surface, and therefore, sealing between the first and second oil paths can reliably be attained.
• the annular sealing member is an O-ring
• the oil amount adjusting member is a washer.
• commercially available parts can be used both for the annular sealing member and the oil amount adjusting member. Therefore, manufacturing cost can be reduced.
• cooling oil supplied to the electric motor is caused to flow through the first and second oil paths.
• the amount of cooling oil to be supplied to the electric motor can be adjusted to an appropriate amount in a simple structure, while reliable sealing is maintained.
• an oil path structure that allows flow rate adjustment with simple structure while ensuring reliable sealing can be provided.
• Fig. 1 is a cross sectional view showing a power train (driving device) to which the oil path structure in accordance with an embodiment of the present invention is applied.
• Fig. 2 is a cross sectional view showing, in enlargement, a position surrounded by a two-dotted line II in Fig. 1.
• Fig. 3 is an exploded perspective view showing an assembly of a plain washer and an 0-ring arranged in the recessed portion of Fig. 2.
• Fig. 4 is a cross sectional view illustrating a force acting on the 0-ring in the power train of Fig. 1.
• Fig. 5 is a cross sectional view illustrating a force acting on the O-ring in a modification of the power train of Fig. 1.
• a power train shown in Fig. 1 is mounted on an FR (front engine rear wheel drive) hybrid car that has, as power sources, an internal combustion engine such as a gasoline engine or a diesel engine and a rechargeable secondary battery.
• a power train 10 includes a generator case 31 accommodating a motor generator 200, and a motor case 21 accommodating a motor generator 300 and assembled with generator case 31.
• Generator case 31 and motor case 21 have cylindrical shapes.
• a power distributing mechanism 400 is arranged between motor generator 200 and motor generator 300.
• Motor generator 200 is provided on the front side of the car, than motor generator 300.
• Motor generator 200 includes a stator 61 and a rotor 65.
• Stator 61 is fixed on an inner circumference of generator case 31 by fastening a bolt or the like.
• generator case 31 On generator case 31, a rotor shaft 66 is rotatably supported with a bearing interposed. Rotor 65 is fixed on rotor shaft 66.
• Motor generator 300 includes a stator 81 and a rotor 85.
• Stator 81 is fixed on an inner circumference of motor case 21 by fastening a bolt or the like.
• a rotor shaft 86 is rotatably supported with a bearing interposed.
• Rotor 85 is fixed on rotor shaft 86.
• Stators 61 and 81 are formed, for example, by a stator core of laminated sheet steel and a copper wire wound around a teeth portion of the stator core.
• Power distributing mechanism 400 is formed of a set of planetary gear mechanism. Power distributing mechanism 400 is fixed on a shaft 51 connected to an • output axis of the engine, on rotor shaft 66 of motor generator 200 and on a shaft 52 connected to automatic transmission 500.
• the power generated by the engine is fed by shaft 51 and divided into two paths by power distributing mechanism 400.
• One is a path that rotates shaft 52 and drives a rear drive shaft through automatic transmission 500, and the other is a path that rotates rotor shaft 66 as well as rotor 65 to produce electric power in motor generator 200.
• motor generator 200 charges a battery, not shown, with the electric power generated by the engine power, or supplies the electric power to motor generator 300.
• motor generator 200 functions as a starter, that is, an electric motor, that rotates the output axis of the engine and performs cranking.
• Motor generator 300 operates with at least one of the electric power stored in the battery and the electric power generated by motor generator 200. Specifically, in motor generator 300, a magnetic field is generated as stator 81 receives electric power supply. The generated magnetic field rotates rotor 85, and shaft 52 rotates accordingly. The driving force of motor generator 300 generated in this manner is transmitted through automatic transmission 500 to the rear drive shaft. In this manner, motor generator 300 assists the driving power of the engine and realizes running of the vehicle with the electric power supplied from motor generator 200.
• Power train 10 further includes an electric oil pump 73 and a mechanical oil pump 72 that operates receiving the driving power from the engine. In each of motor case 21 and generator case 31, a cooling oil path 22 and a cooling oil path 32 communicated with cooling oil path 22 are formed.
• the cooling oil fed with pressure from electric oil pump 73 or mechanical oil pump 72 passes through cooling oil path 22 and supplied to the stator core of stator 81 and to a coil end 82. Further, the cooling oil passes through cooling oil path 22 to cooling oil path 32, and supplied to the stator core of stator 61 and to a coil end 62.
• motor case 21 has a joint surface 21a at which cooling oil path 22 is opened
• generator case 31 has a joint surface 3 Ia at which cooling oil path 32 is opened.
• cooling oil path 22 extends in a direction orthogonal to the j oint surface 21a.
• cooling oil path 32 extends in a direction diagonally crossing the joint surface 31a.
• Joint surfaces 21a and 3 Ia are joined such that cooling oil paths 22 and 32 communicate with each other.
• the cooling oil paths extend in mutually different directions.
• a recessed portion 33 is formed at a position on route of cooling oil path 32.
• Recessed portion 33 is formed indented in columnar shape from joint surface 31a, and recessed portion 33 is defined by a bottom surface 34 extending parallel to the joint surface 3 Ia at a prescribed depth from joint surface 31a, and a side surface 35 extending cylindrically between the circumferential edge of bottom surface 34 and joint surface 31a.
• Cooling oil path 32 approximately leads to the center of bottom surface 34.
• a plain washer 41 and an O-ring 46 are arranged in recessed portion 33. Referring to Figs. 2 and 3, a hole 42 smaller in diameter than cooling oil paths 22 and 32 is formed in plain washer 41. Plain washer 41 is provided such that hole 42 is aligned with the opening of cooling oil path 32. Plain washer 41 abuts bottom surface 34.
• Plain washer 41 is formed of a metal such as iron or stainless steel. A commercially available washer may be used as plain washer 41.
• O-ring 46 is provided on the side opposite to bottom surface 34 with respect to plain washer 41. O-ring 46 is arranged adjacent to plain washer 41 in a direction away from bottom surface 34. O-ring 46 is formed of an elastic member such as NBR (nitrile rubber). A commercially available O-ring may be used as O-ring 46, or an FEPG (Formed In Place Gasket) formed to have a ring-shape may be used.
• NBR non-ring
• FEPG Form In Place Gasket
• plain washer 41 is sandwiched between bottom surface 34 and O-ring 46 and held in recessed portion 33. Therefore, it is unnecessary to have plain washer 41 seated in recessed portion 33 by press-fitting (namely, dimensional setting of D4 > D2 is possible). Accordingly, it is easy to arrange plain washer 41 in recessed portion 33. Further, at the position where plain washer 41 is arranged, processing accuracy of recessed portion 33 may be set rough, and therefore, processing of recessed portion 33 becomes easier.
• O-ring 46 and plain washer 41 are arranged both on the upstream side and downstream side of the cooling oil flow. Therefore, at recessed portion 33 before the flow rate of cooling oil is limited by plain washer 41, the pressure of cooling oil increases, and hence, O-ring 46 is urged to side surface 35, as represented by an arrow 101. This improves tight sealing between cooling oil path 22 and cooling oil path 32.
• cooling oil flows from cooling oil path 32 to cooling oil path 22, and that plain washer 41 and O-ring 46 are arranged both on the upstream side and downstream side of the cooling oil flow.
• the cooling oil flowing through cooling oil path 32 presses the surface of plain washer 41, and by the pressed plain washer 41, O-ring 46 is urged to joint surface 21a, as represented by an arrow 102.
• tight sealing between cooling oil path 22 and cooling oil path 32 can be improved.
• the oil path structure of the present embodiment includes: motor case 21 as a first member having joint surface 21a and having cooling oil path 22 as the first oil path opened to joint surface 21a formed therein; generator case 31 as the second member having cooling oil path 32 as the second oil path formed therein and joined to joint surface 21a such that cooling oil path 22 and cooling oil path 32 communicate with each other; O-ring 46 as an annular sealing member sealing between cooling oil path 22 and cooling oil path 32; and plain washer 41 as an oil amount adjusting member limiting the amount of oil flowing through the cooling oil path.
• generator case 31 at a position adjacent to joint surface 21a and on route of cooling oil path 32, recessed portion 33 as an accommodating portion is formed.
• recessed portion 33 in which O-ring 46 and plain washer 41 are arranged is formed in generator case 31, it may be formed in motor case 21. In that case also, first, plain washer 41 is arranged in recessed portion 33 and then O-ring 46 is arranged to be sandwiched between plain washer 41 and joint surface 31a.
• the oil path structure of the present invention is applicable not only to the cooling oil path through which the cooling oil flows but also to an oil path through which lubricant oil or hydraulic oil flows.
• the oil path structure of the present invention may be applied, for example, to an oil path between a valve body performing hydraulic pressure control of oil supplied to the automatic transmission and a strainer absorbing the oil in an oil pan to the valve body.
• the oil path structure may be applied to the oil path between the upper and lower bodies.
• the present invention is mainly applicable to an oil amount adjusting mechanism provided on a vehicle,

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Transportation (AREA)
• Power Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Combustion & Propulsion (AREA)
• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Sustainable Development (AREA)
• Sustainable Energy (AREA)
• Motor Or Generator Cooling System (AREA)
• General Details Of Gearings (AREA)
• Hybrid Electric Vehicles (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

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ID=36648628

Family Applications (1)

Country Status (4)

Cited By (3)

Families Citing this family (9)

Citations (3)

• 2005
  • 2005-04-18 JP JP2005119364A patent/JP2006300122A/ja not_active Withdrawn
• 2006
  • 2006-03-22 WO PCT/JP2006/306401 patent/WO2006114970A1/en not_active Ceased
  • 2006-03-22 DE DE112006000762T patent/DE112006000762T5/de not_active Withdrawn
  • 2006-03-22 CN CNA2006800129406A patent/CN101160481A/zh active Pending

Patent Citations (3)

Non-Patent Citations (2)

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