WO2023182455A1 - 動力伝達装置 - Google Patents

動力伝達装置 Download PDF

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Publication number
WO2023182455A1
WO2023182455A1 PCT/JP2023/011618 JP2023011618W WO2023182455A1 WO 2023182455 A1 WO2023182455 A1 WO 2023182455A1 JP 2023011618 W JP2023011618 W JP 2023011618W WO 2023182455 A1 WO2023182455 A1 WO 2023182455A1
Authority
WO
WIPO (PCT)
Prior art keywords
support wall
chamber
power transmission
oil passage
transmission device
Prior art date
Application number
PCT/JP2023/011618
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
勝則 山下
洋久 湯川
将弘 神谷
智雄 池田
謙治 児島
晃 東山
泰章 湯本
務 伊藤
和也 沼田
淳之介 川原
和慶 秋山
Original Assignee
ジヤトコ株式会社
日産自動車株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ジヤトコ株式会社, 日産自動車株式会社 filed Critical ジヤトコ株式会社
Priority to CN202380028302.7A priority Critical patent/CN118829810A/zh
Priority to US18/846,999 priority patent/US20250207661A1/en
Priority to JP2024509234A priority patent/JP7604087B2/ja
Publication of WO2023182455A1 publication Critical patent/WO2023182455A1/ja

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Classifications

    • 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
    • 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
    • F16H57/028—Gearboxes; Mounting gearing therein characterised by means for reducing vibration or noise
    • 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
    • F16H57/03—Gearboxes; Mounting gearing therein characterised by means for reinforcing gearboxes, e.g. ribs
    • 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
    • F16H57/0402—Cleaning of lubricants, e.g. filters or magnets
    • F16H57/0404—Lubricant filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/042—Guidance of lubricant
    • F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
    • F16H57/0424—Lubricant guiding means in the wall of or integrated with the casing, e.g. grooves, channels, holes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps; Pressure control
    • F16H57/0435—Pressure control for supplying lubricant; Circuits or valves therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps; Pressure control
    • F16H57/0441—Arrangements of pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps; Pressure control
    • F16H57/0445—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps; Pressure control for supply of different gearbox casings or sections
    • 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
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • 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
    • F16H57/035—Gearboxes for gearing with endless flexible members
    • 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
    • F16H57/037—Gearboxes for accommodating differential gearings

Definitions

  • the present invention relates to a power transmission device.
  • Patent Document 1 discloses a drive device for a vehicle.
  • the mechanical oil pump and the electric oil pump share a strainer.
  • the strainer is provided in a cantilevered state on the mechanical oil pump.
  • the electric oil pump and the mechanical oil pump are mounted on one side and the other side of the same wall so that the strainer can be shared.
  • An aspect of the present invention is a case that accommodates a power transmission mechanism; a control valve that controls hydraulic pressure supplied to the power transmission mechanism and is placed vertically within the case;
  • a power transmission device comprising a first pump and a second pump that supply oil to the control valve
  • the said case is a first support wall that supports a rotating shaft of the power transmission mechanism; a second support wall that supports the control valve and is arranged along the rotation axis; a first chamber located on one side of the first support wall; a second chamber adjacent to the first chamber with the second support wall in between; a third support wall extending from the second support wall to the other side of the first support wall along the rotation axis, the first pump is attached to the first support wall within the first chamber;
  • the second pump is a power transmission device attached to the third support wall within the second chamber.
  • FIG. 1 is a schematic diagram showing a schematic configuration of a power transmission device.
  • FIG. 2 is a diagram of the case viewed from the second cover side.
  • FIG. 3 is a diagram of the case viewed from the third cover side.
  • FIG. 4 is a diagram schematically showing a cross section of the housing taken along line AA in FIG.
  • FIG. 5 is a diagram schematically showing a cross section of the housing taken along line AA in FIG.
  • FIG. 6 is a perspective view of the strainer viewed from above on the upper case side.
  • FIG. 7 is a diagram illustrating the support structure of the mechanical oil pump in the partition wall.
  • FIG. 8 is a diagram of the housing section viewed from the front side of the vehicle.
  • FIG. 9 is a diagram schematically showing a cross section of the housing taken along line AA in FIG.
  • FIG. 10 is a diagram schematically showing a cross section of the housing taken along line AA in FIG.
  • FIG. 11 is a diagram schematically showing a cross section of the housing taken along line BB in FIG.
  • FIG. 12 is a diagram schematically showing a cross section of the housing taken along line CC in FIG.
  • the power transmission device is a device having at least a power transmission mechanism, and the power transmission mechanism is, for example, at least one of a gear mechanism, a differential gear mechanism, and a speed reduction mechanism.
  • the power transmission device has a function of transmitting the output rotation of the engine is exemplified, but the power transmission device is one that transmits the output rotation of at least one of the engine and the motor (rotating electric machine). That's fine.
  • “Overlapping in a predetermined direction” means that a plurality of elements are lined up in a predetermined direction, and has the same meaning as "overlapping in a predetermined direction.”
  • the "predetermined direction” is, for example, an axial direction, a radial direction, a gravity direction, a vehicle running direction (vehicle forward direction, vehicle backward direction), or the like. If a drawing shows multiple elements (parts, parts, etc.) lining up in a predetermined direction, there is a sentence in the description explaining that they overlap when viewed in the predetermined direction. It can be considered as.
  • “Do not overlap when viewed in a predetermined direction” and “offset when viewed in a predetermined direction” mean that multiple elements are not lined up in a predetermined direction, and "do not overlap in a predetermined direction” , is synonymous with the expression “offset in a predetermined direction”.
  • the "predetermined direction” is, for example, an axial direction, a radial direction, a gravity direction, a vehicle running direction (vehicle forward direction, vehicle backward direction), or the like. If a drawing shows that multiple elements (parts, parts, etc.) are not lined up in a predetermined direction, there is a sentence in the description explaining that they do not overlap when viewed in a predetermined direction. It can be considered as.
  • the first element (component, section, etc.) is located between the second element (component, section, etc.) and the third element (component, section, etc.) when viewed from a predetermined direction" means In this case, the first element can be observed to be between the second and third elements.
  • the "predetermined direction" includes an axial direction, a radial direction, a direction of gravity, a vehicle running direction (vehicle forward direction, vehicle backward direction), and the like.
  • vehicle forward direction vehicle backward direction
  • the first element is located between the second element and the third element when viewed in the radial direction. It can be said that it is located.
  • Axial direction means the axial direction of the rotating shaft of the components that constitute the power transmission device.
  • Rotary direction means a direction perpendicular to the rotational axis of the components constituting the power transmission device.
  • the parts are, for example, a motor, a gear mechanism, a differential gear mechanism, etc.
  • Downstream side in the rotational direction means the downstream side in the rotational direction when the vehicle is moving forward or the rotational direction when the vehicle is moving backward. It is preferable to set it on the downstream side in the direction of rotation when the vehicle moves forward, which is often the case.
  • “Vertical installation” of a control valve means that in the case of a control valve that has a basic configuration with a separate plate sandwiched between the valve bodies, the valve body of the control valve is placed horizontally with respect to the installation state of the power transmission device in the vehicle. This means that they are laminated in the same direction.
  • the term "horizontal direction” as used herein does not mean the horizontal direction in a strict sense, but also includes cases where the stacking direction is tilted with respect to the horizontal line.
  • vertical installation of a control valve means that the control valve is arranged in such a way that the multiple pressure regulating valves in the control valve are arranged in the vertical line VL direction based on the installation state of the power transmission device in the vehicle.
  • a plurality of pressure regulating valves are arranged in the direction of the vertical line VL means that the pressure regulating valves (valve bodies) in the control valve are arranged with their positions shifted in the direction of the vertical line VL.
  • the plurality of pressure regulating valves do not need to be strictly lined up in a line in the vertical line VL direction.
  • the plurality of pressure regulating valves are shifted in the direction of stacking of the valve bodies, and the vertical line VL They may be lined up in the same direction.
  • the plurality of pressure regulating valves do not need to be lined up at intervals in the vertical line VL direction.
  • the plurality of pressure regulating valves do not need to be adjacent to each other in the vertical line VL direction.
  • pressure regulating valves lined up in the vertical line VL direction are arranged with their positions shifted in the stacking direction (horizontal line direction) of the valve body, the pressure regulating valves lined up in the vertical line VL direction are shifted when viewed from the stacking direction.
  • This also includes cases where adjacent pressure regulating valves are provided in a positional relationship that partially overlaps.
  • the multiple pressure regulating valves in the control valve are arranged in such a way that the moving direction of the valve body (spool valve) of the pressure regulating valve is along the horizontal direction.
  • the moving direction of the valve body (spool valve) in this case is not limited to the horizontal direction in the strict sense.
  • the moving direction of the valve body (spool valve) in this case is a direction along the rotation axis X of the power transmission device. In this case, the rotation axis X direction and the sliding direction of the valve body (spool valve) are the same.
  • FIG. 1 is a schematic diagram illustrating a schematic configuration of a power transmission device 1. As shown in FIG. 1
  • the housing HS of the power transmission device 1 includes a case 6, a first cover 7, a second cover 8, and a third cover 9.
  • the torque converter T/C, forward/reverse switching mechanism 2, variator 3, deceleration mechanism 4, differential device 5, electric oil pump EOP, mechanical oil pump MOP, control valve CV, strainer 10, etc. are housed. be done.
  • the torque converter T/C, the forward/reverse switching mechanism 2, the variator 3, the speed reduction mechanism 4, and the differential device 5 are the constituent elements of the power transmission mechanism in the invention.
  • the output rotation of the engine ENG (drive source) is input to the forward/reverse switching mechanism 2 via the torque converter T/C.
  • the rotation input to the forward/reverse switching mechanism 2 is input to the primary pulley 31 of the variator 3 in forward or reverse rotation.
  • the rotation input to the primary pulley 31 is changed at a desired gear ratio, and the rotation is transferred to the output shaft 33 of the secondary pulley 32. is output from.
  • the output rotation of the secondary pulley 32 is input to the differential device 5 (differential gear mechanism) via the reduction mechanism 4, and then transmitted to the drive wheels WH, WH via the left and right drive shafts 55A, 55B. .
  • the speed reduction mechanism 4 includes an output gear 41, an idler gear 42, a reduction gear 43, and a final gear 45.
  • the output gear 41 rotates together with the output shaft 33 of the secondary pulley 32.
  • the idler gear 42 meshes with the output gear 41 so that rotation can be transmitted thereto.
  • the idler gear 42 rotates together with the idler shaft 44.
  • the idler shaft 44 is provided with a reduction gear 43 having a smaller diameter than the idler gear 42.
  • the reduction gear 43 meshes with a final gear 45 fixed to the outer periphery of the differential case 50 of the differential device 5 so as to be able to transmit rotation.
  • the forward/reverse switching mechanism 2 the torque converter T/C, and the output shaft of the engine ENG are arranged coaxially (concentrically) on the rotation axis X1 (first axis) of the primary pulley 31. Ru.
  • the output shaft 33 of the secondary pulley 32 and the output gear 41 are coaxially arranged on the rotation axis X2 (second axis) of the secondary pulley 32.
  • the idler gear 42 and the reduction gear 43 are coaxially arranged on a common rotation axis X3.
  • Final gear 45 and drive shafts 55A and 55B are coaxially arranged on a common rotation axis X4.
  • these rotational axes X1 to X4 are set in a positional relationship in which they are parallel to each other.
  • these rotational axes X1 to X4 will be collectively referred to as the rotational axis X of the power transmission device 1 (power transmission mechanism), if necessary.
  • FIG. 2 is a schematic diagram showing the case 6 viewed from the second cover 8 side.
  • FIG. 3 is a schematic diagram showing the case 6 viewed from the first cover 7 side.
  • illustration of the strainer 10 and mechanical oil pump MOP is omitted, and the vicinity of the connecting portions 625 and 627 provided in the partition wall portion 62 is shown.
  • the area of the opening 620 is shown with cross hatching in order to make the position of the opening 620 easier to understand.
  • the case 6 includes a cylindrical peripheral wall portion 61 and a partition wall portion 62.
  • the partition wall 62 divides the space inside the peripheral wall 61 into two in the direction of the rotation axis X1.
  • One side of the partition wall portion 62 in the direction of the rotation axis X1 is the first chamber S1, and the other side is the third chamber S3.
  • the opening on the side of the first chamber S1 is sealed with a second cover 8 (torque converter cover) to form a closed first chamber S1.
  • the opening on the third chamber S3 side is sealed with the first cover 7 (side cover) to form a closed third chamber S3.
  • the forward/reverse switching mechanism 2, the speed reduction mechanism 4, and the differential gear 5 are housed in the first chamber S1.
  • the variator 3 is accommodated in the third chamber S3.
  • a housing portion 68 forming a second chamber S2 is attached to the outer periphery of the peripheral wall portion 61 on the vehicle front side.
  • the housing portion 68 is provided with an opening facing toward the front side of the vehicle.
  • the opening of the accommodating portion 68 is sealed with the third cover 9 to form a closed second chamber S2.
  • the second chamber S2 is provided with a control valve CV and an electric oil pump EOP.
  • control valve CV has a basic configuration in which a separate plate 920 is sandwiched between valve bodies 921, 921.
  • a hydraulic control circuit (not shown) is formed inside the control valve CV.
  • the hydraulic control circuit is provided with a solenoid that is driven based on a command from a control device (not shown) and a pressure regulating valve SP (spool valve) that is operated by signal pressure generated by the solenoid.
  • the control valve CV is placed vertically with the stacking direction of the valve bodies 921, 921 aligned with the longitudinal direction of the vehicle.
  • the spool valve within the control valve is arranged so that its forward and backward movement direction is along the horizontal direction.
  • the spool valve within the control valve is arranged with its position shifted in the vertical line VL direction. Therefore, the forward and backward movement of the spool valve is not obstructed, and the second chamber S2 is prevented from increasing in size in the longitudinal direction of the vehicle.
  • the partition wall portion 62 of the case 6 is provided in a range that crosses the rotation axis (rotation axis X1 to rotation axis X4) of the power transmission mechanism.
  • the partition wall portion 62 is provided in a direction substantially perpendicular to the rotation axis (rotation axis X1 to rotation axis X4).
  • the partition wall portion 62 is provided with through holes 621, 622, 624 and a support hole 623.
  • the through hole 621 is formed around the rotation axis X1.
  • a cylindrical support wall 631 surrounding the through hole 621 and a peripheral wall 641 surrounding the outer periphery of the support wall 631 with an interval are provided on the side of the partition wall 62 on the first chamber S1 side (the front side in the drawing).
  • a cylindrical support wall 631 surrounding the through hole 621 and a peripheral wall 641 surrounding the outer periphery of the support wall 631 with an interval are provided.
  • the support wall portion 631 and the peripheral wall portion 641 protrude toward the front side of the paper (the second cover 8 side in FIG. 1).
  • a region 651 between the support wall portion 631 and the peripheral wall portion 641 is a cylindrical space that accommodates a piston (not shown) of the forward/reverse switching mechanism 2, a friction plate (forward clutch, reverse brake), and the like.
  • the input shaft 34 (see FIG. 1) of the primary pulley 31 is rotatably supported on the inner periphery of the support wall portion 631 via a bearing B.
  • the through hole 622 is formed around the rotation axis X2.
  • the rotation axis X2 is located diagonally above the rear side of the vehicle when viewed from the rotation axis X1.
  • the output shaft 33 (see FIG. 1) of the secondary pulley 32 is rotatably supported in a peripheral wall portion 632 surrounding the through hole 622.
  • the support hole 623 is a bottomed hole formed around the rotation axis X3.
  • the rotation axis X3 is located diagonally above the rear side of the vehicle when viewed from the rotation axis X1, and diagonally below the rear side of the vehicle when viewed from the rotation axis X2.
  • the idler shaft 44 (see FIG. 1) is rotatably supported in the peripheral wall portion 633 surrounding the support hole 623.
  • the through hole 624 is formed around the rotation axis X4.
  • the rotation axis X4 is located diagonally downward on the rear side of the vehicle when viewed from the rotation axis X1, diagonally downward on the rear side of the vehicle when viewed from the rotation axis X2, and diagonally downward on the rear side of the vehicle when viewed from the rotation axis X3. It is located diagonally below the front of the vehicle.
  • a cylindrical support wall portion 634 surrounding the through hole 624 is provided on the surface of the partition wall portion 62 on the first chamber S1 side (the front side in the drawing).
  • a differential case 50 (see FIG. 1) of the differential gear 5 is rotatably supported on the inner periphery of the support wall portion 634 via a bearing B.
  • a drive shaft 55A extending from the differential case 50 passes through the through hole 624.
  • a final gear 45 having a ring shape when viewed from the rotation axis X4 direction is fixed to the outer periphery of the differential case 50.
  • Final gear 45 rotates around rotation axis X4 together with differential case 50.
  • the partition wall portion 62 functions as a support wall for the input shaft 34 of the primary pulley 31, the output shaft 33 of the secondary pulley 32, the idler shaft 44, the differential case 50, and the drive shaft 55A.
  • a region on the vehicle front side of the final gear 45 and below the arc-shaped peripheral wall portion 641 serves as a housing portion 67 for the strainer 10 and the mechanical oil pump MOP.
  • the housing portion 67 is located at the lower part of the case 6 (housing HS). Therefore, oil OL used for driving and cooling the components of the power transmission mechanism is stored in the storage portion 67.
  • the housing portion 67 is a bottomed space with an opening facing the first chamber S1 side (the right side in FIG. 4).
  • the accommodating portion 67 is formed in a range that crosses in the direction of the rotation axis X1 below the region 651 in which the forward/reverse switching mechanism 2 is accommodated.
  • An opening 620 that passes through the partition wall 62 in the direction of the rotation axis X1 is formed in the lower part of the partition wall 62.
  • the opening 620 is provided at a position that overlaps the tangent Lm when viewed from the direction of the rotation axis X1.
  • the tangent Lm is a tangent that connects the outer periphery of the arc-shaped peripheral wall portion 641 surrounding the forward/reverse switching mechanism 2 (not shown) and the outer periphery of the final gear 45.
  • the opening 620 is formed in a range extending from the region between the peripheral wall 641 and the final gear 45 along the straight line Ln, crossing the tangent Lm from above to below to the lower part of the case 6.
  • the straight line Ln is a straight line that passes between the peripheral wall portion 641 and the final gear 45 and is perpendicular to the tangent line Lm.
  • the area between the peripheral wall portion 641 and the final gear 45 tends to be a dead space that is not used, but the opening 620 is provided to effectively utilize the dead space.
  • a connecting portion 625 of the strainer 10 is provided at a position adjacent to the peripheral wall portion 641.
  • the connecting portion 625 is a cylindrical portion with a connecting port 625a facing the second cover 8 side (first chamber S1 side).
  • the connecting portion 625 is provided in a positional relationship in which a part of the region on the lower side overlaps with the opening 620 when viewed from the direction of the rotation axis X1. A part of the lower region of the connecting portion 625 when viewed from the rotation axis X1 direction protrudes into the opening 620.
  • an oil passage 626 is opened on the back side of the connecting portion 625. As shown in FIG. 2, the oil passage 626 extends linearly within the partition wall 62 in a direction away from the opening 620.
  • the oil passage 626 is connected to the electric oil pump EOP housed in the housing portion 68 via the oil passage 281 in the case 6 (see FIG. 10).
  • connection portion 627 with a mechanical oil pump MOP is provided below the oil passage 626.
  • the connection port 627a of the connection portion 627 opens in the same direction as the connection port 625a of the connection portion 625 described above.
  • a connection port 627a of the connection portion 627 communicates with an oil passage 628 provided within the partition wall portion 62.
  • the oil passage 628 extends below the oil passage 626 and along the oil passage 626 toward the housing portion 68 (to the right in the figure).
  • the oil passage 628 communicates with a control valve CV (see FIG. 12) installed in the housing part 68 via an oil passage in the case 6.
  • a partition 62 is located inside the peripheral wall 61 surrounding the third chamber S3, and an opening 620 is located at the bottom of the partition 62. is open. Furthermore, on the inside of the peripheral wall portion 61 and above the partition wall portion 62, through holes 621 and 622 are opened. Inside the peripheral wall portion 61, the primary pulley 31 and the secondary pulley 32 of the variator 3 are located in an upper region in the direction of the vertical line VL.
  • the peripheral wall portion 61 has a lower portion side where the primary pulley 31 is provided, which bulges out toward the bottom of the case 6, and an opening 620 is located at the lowest portion of this bulged portion.
  • oil OL supplied through an oil path (not shown) is injected toward the belt 30 of the variator 3 in the third chamber S3 to lubricate the belt 30 of the variator 3.
  • the oil OL that has lubricated the belt 30 moves by its own weight in the third chamber S3 toward the lower part where the opening 620 is provided, passes through the opening 620, and enters the first chamber S1 where the strainer 10 is arranged. It is now returned to the bottom of the page.
  • FIG. 4 is a diagram schematically showing a cross section of the housing HS taken along line AA in FIG. In FIG. 4, the area around the connection between the strainer 10 and the partition wall 62 is shown.
  • FIG. 5 is a diagram schematically showing a cross section of the housing HS taken along the line AA in FIG. In FIG. 5, the arrangement of the strainer 10 and the mechanical oil pump MOP in the housing portion 67 is schematically shown.
  • FIG. 6 is a perspective view of the strainer 10 viewed from above on the upper case 11 side.
  • the strainer 10 has a basic configuration in which a filter 19 is placed in a space S10 formed between an upper case 11 and a lower case 12.
  • a first connecting portion 15 is provided on one side portion 11a of the upper case 11.
  • the first connecting portion 15 is a cylindrical member having an oil discharge path 151 therein.
  • the first connecting portion 15 projects obliquely upward from one side portion 11a of the upper case 11.
  • a second connecting portion 16 is provided on the base side of the first connecting portion 15 .
  • the second connecting portion 16 has a bottomed cylindrical shape and has an oil OL discharge path 161 therein.
  • the first connecting portion 15 and the second connecting portion 16 are provided in a direction perpendicular to the opening directions of the discharge passages 151 and 161.
  • the discharge passage 161 in the second connection part 16 and the discharge passage 151 in the first connection part 15 open into the space S10 inside the strainer 10.
  • a recess 17 (notch) recessed toward the lower case 12 is provided in a region located on the extension of the discharge path 161 in the second connecting portion 16. Therefore, as shown in FIG. 4, the cylindrical member 130 for connecting the strainer 10 and the connection part 625 on the partition wall part 62 side is discharged from the side of the strainer 10 without interfering with the upper case 11. It can be inserted into the channel 161. As shown in FIG. 2, a suction port 13 is provided in a portion of the strainer 10 that faces the bottom wall portion 613.
  • the bottom wall portion 613 is a region disposed at the lower part of the peripheral wall portion 61 of the case 6 in the direction of the vertical line VL based on the installation state of the power transmission device 1 in the vehicle V.
  • the strainer 10 is assembled to the mechanical oil pump MOP by inserting the tip 15a side of the first connecting portion 15 into the connecting port 120 on the mechanical oil pump MOP side.
  • the mechanical oil pump MOP is assembled to the partition wall 62, and the strainer 10 is supported by the partition wall 62 via the mechanical oil pump MOP.
  • FIG. 7 is a diagram illustrating the support structure of the mechanical oil pump MOP in the partition wall portion 62.
  • FIG. 7 schematically shows a cross section of the mechanical oil pump MOP taken along line AA in FIG.
  • a positioning protrusion 150 and an oil OL discharge port 140 are provided at a portion of the mechanical oil pump MOP that faces the partition wall 62.
  • an insertion hole 630 and a connecting portion 627 are opened on a surface facing the mechanical oil pump MOP.
  • the mechanical oil pump MOP is positioned at a predetermined position on the partition wall 62 by inserting the protrusion 150 into the insertion hole 630 of the partition wall 62 .
  • the mechanical oil pump MOP is fixed to the partition wall 62 with bolts (not shown).
  • the discharge port 140 of the mechanical oil pump MOP is disposed at a position facing the connection portion 627 on the partition wall portion 62 side, and the discharge port 140 and the connection portion 627 are connected to each other. communicate.
  • the connecting portion 627 communicates with an oil passage 628 within the partition wall portion 62 .
  • oil OL discharged from the discharge port 140 of the mechanical oil pump MOP is supplied into the oil passage 628 through the connection portion 627.
  • the oil OL supplied to the oil passage 628 is supplied to the control valve CV within the housing portion 68 (see FIG. 12).
  • the direction in which the mechanical oil pump MOP is assembled to the partition wall 62 (the left-right direction in FIG. 7) is the same as the direction in which the second connection portion 16 of the strainer 10 is assembled to the partition wall 62 (the left-right direction in FIG. 4). be. Therefore, when the mechanical oil pump MOP is attached to the partition wall part 62, the second connection part 16 of the strainer 10 is connected to the connection part 625 on the partition wall part 62 side via the cylindrical member 130 at approximately the same time. In this state, the strainer 10 has the first connecting part 15 supported by the mechanical oil pump MOP, and the second connecting part 16 connected to the partition wall through the cylindrical member 130 inserted into the second connecting part 16. 62.
  • FIG. 8 is a diagram of the housing portion 68 viewed from the front side of the vehicle.
  • the second chamber S2 viewed from the front side of the vehicle is schematically shown together with other components of the housing HS (case 6, first cover 7, and second cover 8).
  • the region of the joint portion 683 located on the near side of the paper is shown with crossed hatching.
  • the appearance of the control valve CV is schematically shown.
  • the enlarged view in FIG. 8 is an enlarged view schematically showing a portion of the storage chamber 69 (third support wall) located on the back side of the paper plane of the electric oil pump EOP.
  • the accommodating portion 68 when viewed from the front side of the vehicle, has a peripheral wall portion 681 that surrounds the entire outer periphery of the second chamber S2.
  • the end surface of the peripheral wall portion 681 on the near side in the drawing forms a joint portion 683 with the third cover 9.
  • the housing portion 68 is provided in a direction along the rotation axis X of the power transmission device 1.
  • the accommodating portion 68 is formed to have a range in the rotation axis X direction (in the left-right direction in the figure) extending from a region adjacent to the peripheral wall portion 61 of the case 6 to the side of the first cover 7.
  • the bottom wall part 682 (second support wall), and approximately half area on the first cover 7 side
  • the area serves as the bottom wall portion 691 (third support wall).
  • the bottom wall portion 682 and the bottom wall portion 691 are provided with positions shifted in the vehicle longitudinal direction.
  • the bottom wall portion 682 is formed integrally with the peripheral wall portion 61 on the case 6 side.
  • the bottom wall portion 691 is provided on the vehicle front side of the first cover 7 with a gap between the bottom wall portion 691 and the outer periphery of the first cover 7 .
  • the control valve CV is vertically placed with the stacking direction of the valve bodies 921, 921 aligned with the longitudinal direction of the vehicle (in the paper, front to back direction). .
  • the control valve CV is vertically placed so as to satisfy the following conditions.
  • (a) A plurality of pressure regulating valves SP (spool valves) in the control valve CV are lined up in the vertical line VL direction (vertical direction) based on the installation state of the power transmission device 1 in the vehicle V,
  • Pressure regulating valve The forward and backward movement direction Xp of SP (spool valve) is along the horizontal direction.
  • control valve CV is vertically placed in the second chamber S2 while preventing the forward and backward movement of the pressure regulating valve SP (spool valve) from being obstructed. Therefore, the second chamber S2 is prevented from increasing in size in the longitudinal direction of the vehicle.
  • the control valve CV When viewed from the front side of the vehicle, the control valve CV has a substantially L-shape in which a notch 923 is provided in a substantially rectangular valve body 921.
  • the notch 923 is provided to avoid interference with the electric oil pump EOP.
  • a portion of the second cover 8 side (left side in the figure) of the electric oil pump EOP is accommodated in the notch 923. Therefore, when viewed from the direction of the vertical line VL, a part of the electric oil pump EOP is provided in a positional relationship overlapping with the control valve CV.
  • control valve CV and the electric oil pump EOP are lined up in the direction of the rotation axis X of the power transmission device 1 (in the left-right direction in the figure).
  • the control valve CV is provided so as to overlap the case 6 when viewed from the front side of the vehicle.
  • the electric oil pump EOP is provided so as to overlap the first cover 7 when viewed from the front side of the vehicle.
  • the electric oil pump EOP has a basic configuration in which a control section 51, a motor section 52, and a pump section 53 are arranged in series in the direction of the rotation axis Z1 of the motor M.
  • the electric oil pump EOP is provided with a rotation axis Z1 perpendicular to a rotation axis X of the power transmission device 1. In this state, the electric oil pump EOP positions the pump section 53 at the upper side in the second chamber S2 (accommodating chamber 69) and positions the control section 51 at the lower side in the second chamber S2 (accommodating chamber 69). It is placed vertically.
  • FIG. 9 is a diagram schematically showing a cross section of the housing HS taken along line AA in FIG. 8.
  • a cross section of a portion of the storage chamber 69 in the second chamber S2 is schematically shown together with a cross section of the peripheral wall portion 71 of the first cover 7 located on the rear side of the vehicle.
  • a housing chamber 69 for the electric oil pump EOP is provided in an area that overlaps with the first cover 7 when viewed from the front side of the vehicle.
  • the storage chamber 69 is formed by bulging the bottom wall portion 682 toward the first cover 7 side (the right side in FIG. 9).
  • the bottom wall portion 691 of the storage chamber 69 is located at a distance of a depth D69 toward the first cover 7 when viewed from the bottom wall portion 682.
  • a wall portion 693 connected to the upper side of the bottom wall portion 682 extends above the electric oil pump EOP toward the front side of the vehicle.
  • a wall portion 692 connected to the lower side of the bottom wall portion 682 extends below the electric oil pump EOP toward the front side of the vehicle. It is located on an extension of the peripheral wall portion 681 of the housing portion 68 .
  • a portion of the electric oil pump EOP on the first cover 7 side is accommodated in the accommodation chamber 69.
  • the bottom wall portion 691 of the storage chamber 69 is provided with two boss portions 21 and 22 each having bolt holes 21a and 22a.
  • the boss portions 21, 21 are arranged at intervals in the horizontal direction above the vertical line VL direction.
  • the boss portions 22, 22 are arranged below the boss portions 21, 21 in the vertical line VL direction and are spaced apart from each other in the horizontal direction.
  • Bolts BL1, BL1 passing through the electric oil pump EOP are screwed into the bolt holes 21a, 21a of the boss parts 21, 21.
  • a boss portion 26 is provided at a position adjacent to the boss portion 22 on the control valve CV side.
  • An oil OL supply port 26a is opened in the boss portion 26.
  • a reinforcing rib 24 is provided spanning the boss portion 26 and the boss portion 22. The ribs 24 are oriented along the horizontal direction.
  • a boss portion 25 is provided above the boss portion 22 on the side of the boss portion 22 (on the right side in the figure) to which the rib 24 is connected.
  • the boss portion 25 has an oil OL discharge port 25a open therein.
  • a bulging portion 27 that bulges toward the front in the drawing is provided on the control valve CV side (left side in the figure) when viewed from the boss portion 25. The bulging portion 27 extends along the horizontal line toward the control valve CV.
  • the bottom wall 691 of the storage chamber 69 is spaced apart from the peripheral wall 71 of the first cover 7.
  • the outer periphery of the bottom wall 691 is provided with a bulge 28 that bulges toward the peripheral wall 71 (to the right in the figure).
  • the bulging portion 28 is located on the opposite side of the boss portion 26 with the bottom wall portion 691 interposed therebetween.
  • An oil passage 281 is provided inside the bulge 28 .
  • the oil passage 281 communicates with an oil OL supply port 26a provided in the boss portion 26.
  • FIG. 10 is a cross-sectional view of the housing HS taken along line AA in FIG.
  • the oil passage 281 extends linearly within the bulge 28 attached to the bottom wall 691 in the direction of the rotation axis X of the power transmission device.
  • the bulging portion 28 is provided spanning the bottom wall portion 691 and the partition wall portion 62.
  • the oil passage 281 is a blind hole provided in the bulge 28 .
  • a base end 281a of the oil passage 281 opens at the end surface of the bulging portion 28.
  • the opening on the base end 281a side of the oil passage 281 is sealed with a plug PL.
  • the tip 281b of the oil passage 281 intersects with the oil passage 626 in the partition wall 62 described above.
  • the oil passage 626 extends linearly within the partition wall portion 62.
  • the oil passage 626 is a blind hole provided in the partition wall 62.
  • a base end 626a of the oil passage 626 opens into the second chamber S2.
  • the opening on the base end 626a side of the oil passage 626 is sealed with a plug PL.
  • a tip 626b of the oil passage 626 communicates with the connection port 625a of the connection portion 625 described above.
  • blind hole in this specification means a linear oil hole with one end (tip) closed.
  • the oil passages 281 and 626 are formed, for example, by drilling the case 6 (bulging portion 28) after casting.
  • a hole with a dead end at the tip is machined without penetrating the area of the bulge 28. That is, a "blind hole” is a hole formed so that the tip thereof becomes a dead end without penetrating the processed area of the oil passage, and is formed by processing such as drilling, for example.
  • the oil passages 626 and 281 that connect the electric oil pump EOP and the strainer 10 are formed by communicating two blind holes.
  • oil OL stored in the lower part of the housing HS is sucked through the strainer 10.
  • the oil OL sucked into the strainer 10 flows into the oil passage 626 from the second connection portion 16 .
  • the oil OL that has flowed into the oil passage 626 flows into the oil passage 281 that opens on the second chamber S2 side within the oil passage 626, and is supplied into the electric oil pump EOP from the oil OL supply port 26a that communicates with the oil passage 281. be done.
  • FIG. 11 is a cross-sectional view of the housing HS taken along line BB in FIG.
  • the oil passage 271 extends linearly within the bulge 27 attached to the bottom wall 691 in the direction of the rotation axis X of the power transmission device.
  • the bulging portion 27 is provided across the bottom wall portion 691 and the partition wall portion 62.
  • the oil passage 271 is a blind hole provided in the bulge 27.
  • a base end 271a of the oil passage 271 is open to the end surface of the bulging portion 27.
  • the opening on the base end 271a side of the oil passage 271 is sealed with a plug PL.
  • the tip 271b of the oil passage 271 intersects with the oil passage 629 within the partition wall portion 62.
  • the oil passage 629 extends linearly within the partition wall 62.
  • the oil passage 629 is a blind hole provided in the partition wall 62.
  • a base end 629a of the oil passage 629 communicates with a control valve CV located within the second chamber S2.
  • the oil passage 271 is connected to an oil discharge port 25a.
  • oil OL pressurized within the electric oil pump EOP is supplied into the oil passage 271 from the discharge port 25a.
  • Oil OL supplied to the oil passage 271 is supplied to the control valve CV through the oil passage 629.
  • FIG. 12 is a cross-sectional view of the housing HS taken along line CC in FIG.
  • a rib 29 is provided on the outer periphery of the bottom wall portion 691. As shown in FIG. 9, the rib 29 extends from the region below the bulge 28 in a direction approaching the peripheral wall 71 of the first cover 7. As shown in FIG. The rib 29 is provided substantially parallel to the lower wall 692 of the storage chamber 69.
  • the rib 29 is provided spanning the bottom wall portion 691 and the partition wall portion 62. As shown in FIG. The rib 29 is formed in such a shape that a bulging width W29 from the bottom wall portion 691 becomes wider as it approaches the partition wall portion 62. Therefore, when viewed from the vertical direction, the ribs 29 are provided diagonally.
  • the peripheral wall portion 71 of the first cover 7 is joined to the partition wall portion 62 of the case 6, and the bottom wall portion 691 extends from the partition wall portion 62 to the side of the peripheral wall portion 71 in a direction away from the partition wall portion 62. .
  • the ribs 29 are provided by utilizing the gaps between the peripheral wall portion 71, the partition wall portion 62, and the bottom wall portion 691.
  • an oil passage 628 is provided in a region that overlaps with the rib 29 when viewed from the mechanical oil pump MOP side (right side in the figure).
  • the oil passage 628 is a blind hole provided in the partition wall 62.
  • a base end 628a of the oil passage 628 communicates with a control valve CV located within the second chamber S2.
  • the oil OL stored in the lower part of the housing HS is sucked into the mechanical oil pump MOP through the strainer 10.
  • the oil OL sucked into the strainer 10 flows into the mechanical oil pump MOP from the first connection portion 15 .
  • the oil OL pressurized by the mechanical oil pump MOP is then supplied into the oil passage 628 through the discharge port 140 and the connecting portion 627.
  • the oil OL supplied to the oil passage 628 is supplied to the control valve CV through the oil passage 628.
  • the bottom wall portion 691 is a wall portion that is different from the partition wall portion 62 that is involved in supporting the mechanical oil pump MOP.
  • a bottom wall portion 691 extending along the rotation axis X of the power transmission device 1 and a partition wall portion 62 perpendicular to the rotation axis X are provided in directions perpendicular to each other. Since the ribs 29 provided on the outer periphery of the bottom wall portion 691 are provided across the bottom wall portion 691 and the partition wall portion 62, the rigidity strength of the bottom wall portion 691 and the partition wall portion 62 is increased. .
  • the mechanical oil pump MOP By attaching the mechanical oil pump MOP to the first chamber S1 side of the partition wall section 62 and the electric oil pump EOP to the second chamber S2 side of the bottom wall section 691, the mechanical oil pump MOP and the electric oil pump EOP can be supported stably. Improves sex.
  • the mechanical oil pump MOP and the electric oil pump EOP are provided on one side and the other side of the same wall, the sound vibrations caused by the natural frequencies of each pump tend to increase.
  • the mechanical oil pump MOP and the electric oil pump EOP are installed on different walls, and the rotational axis of the mechanical oil pump MOP and the rotational axis of the electric oil pump EOP are perpendicular to each other (parallel or parallel). , in a non-coaxial positional relationship). Therefore, it is expected that sound vibrations caused by the natural frequency of each pump will be reduced.
  • the bulging portion 28 is located on one surface in the thickness direction, and the bulging portion 27 is located on the other surface.
  • the thickness is locally increased, and the bulging directions of the thickened portions are alternated in the vertical direction. ing. This ensures the rigidity and strength of the bottom wall portion 691 without increasing the overall thickness of the bottom wall portion 691. Therefore, the support stability of the electric oil pump EOP on the bottom wall portion 691 is improved without significantly increasing the weight of the power transmission device 1.
  • the rigidity of the bottom wall portion 691 and the partition wall portion 62 can be increased by providing the bulge portion 28 and the rib 29 across the bottom wall portion 691 and the partition wall portion 62 without increasing the size of the housing HS. I can do it.
  • the electric oil pump EOP and the mechanical oil pump MOP are provided on one side and the other side of the same wall, there is no need to increase the thickness of the bottom wall 691 and the partition wall 62.
  • the power transmission device 1 is increased in size in the direction of the rotation axis X (vehicle width direction), and when the thickness of the bottom wall portion 691 is increased, the power transmission device 1 is There is a possibility that the size will increase in the radial direction of X (vehicle longitudinal direction).
  • the electric oil pump EOP and the mechanical oil pump MOP on different wall parts, it is possible to suitably prevent the power transmission device 1 from increasing in size due to increasing the thickness of the wall part.
  • the power transmission device 1 has the following configuration.
  • the power transmission device 1 is a housing HS (case) that houses the power transmission mechanism; a control valve CV that controls hydraulic pressure supplied to the power transmission mechanism and is vertically placed within the housing HS;
  • This is a power transmission device that includes a mechanical oil pump MOP (first pump) and an electric oil pump EOP (second pump) that supply oil OL to a control valve CV.
  • Housing HS is a partition wall portion 62 (first support wall) that supports the rotating shaft of the power transmission mechanism; a bottom wall portion 682 (second support wall) that supports the control valve CV and is arranged along the rotation axis; a first chamber S1 located on one side of the partition wall 62; A second chamber S2 adjacent to the first chamber S1 with the bottom wall portion 682 in between; It has a bottom wall part 691 (third support wall) extending from the bottom wall part 682 to the other side of the partition wall part 62 along the rotation axis.
  • the mechanical oil pump MOP is attached to the partition wall 62 within the first chamber S1.
  • the electric oil pump EOP is attached to the bottom wall portion 691 within the second chamber S2.
  • the electric oil pump EOP is provided on the bottom wall portion 691, which is a wall portion different from the partition wall portion 62 that is involved in supporting the mechanical oil pump MOP. That is, the electric oil pump EOP and the mechanical oil pump MOP are supported by different wall portions (the bottom wall portion 691 and the partition wall portion 62) in the housing HS.
  • the requirement for rigidity of each wall is lower than when the electric oil pump EOP and the mechanical oil pump MOP are supported by the same wall.
  • the electric oil pump EOP and the mechanical oil pump MOP are supported by the same wall, for example, the partition wall 62, it is necessary to increase the thickness of the partition wall 62 to increase the rigidity. In this case, the power transmission device 1 becomes larger by the thicker partition wall portion 62, and the weight of the power transmission device 1 as a whole increases.
  • the electric oil pump EOP and the mechanical oil pump MOP are supported by one side and the other side of the same wall (opposing arrangement of the pumps), and the rotating shaft of the electric oil pump EOP and the mechanical oil pump MOP are supported by the same wall. If the rotating shafts of the power transmission device are arranged parallel to each other or coaxially with the rotating shaft of the power transmission device, it is necessary to increase the thickness of the wall portion in the direction of the rotating shaft. In such a case, the power transmission device becomes larger in the direction of the rotation axis.
  • the power transmission device 1 when the power transmission device 1 is installed in a front-engine, front-drive vehicle (FF vehicle), if the power transmission device 1 becomes larger in the vehicle width direction along the rotation axis, the ease of mounting it on the vehicle will be affected. There are concerns about the impact.
  • the power transmission device In a front wheel drive vehicle, the power transmission device is arranged between the left and right drive wheels WH. Not only the power transmission device 1 but also a drive source (engine) and other parts are arranged between the left and right drive wheels WH. Therefore, the dimension of the power transmission device 1 in the direction of the rotation axis is an important factor that affects the mountability, and it is desirable to suppress the dimension of the power transmission device 1 in the direction of the rotation axis as much as possible.
  • the wall thickness is increased, the power transmission device becomes larger and the weight increases, which becomes a problem.
  • the degree of freedom in layout is lost.
  • by supporting the electric oil pump EOP and the mechanical oil pump MOP on different walls it is possible to suitably suppress an increase in the size and weight of the power transmission device 1, and to ensure a degree of freedom in layout.
  • the third chamber S3 is located on the other side of the partition wall portion 62.
  • the bottom wall portion 691 (third support wall) is located on the side of the third chamber S3.
  • the bottom wall portion 691 and the bottom wall portion 682 form a second chamber S2. Seen from the radial direction of the rotation axis X, the second chamber S2 is provided in a positional relationship overlapping with the first chamber S1 and the third chamber S3.
  • the second chamber S2 is arranged radially outward of the rotation axis X when viewed from the first chamber S1 and the third chamber S3.
  • the second chamber S2 is provided over substantially the entire length of the housing HS in the direction of the rotation axis X.
  • a control valve CV attached to the bottom wall 682 and an electric oil pump EOP attached to the bottom wall 691 are arranged side by side in the direction of the rotation axis X of the power transmission device 1.
  • the second chamber S2 is formed from the side of the first chamber S1. It is formed extending to the side of the third chamber S3. Thereby, a space in which the electric oil pump EOP can be placed can be secured in the second chamber S2. Therefore, the components of the power transmission device 1 can be arranged without leaving a large unused space around the housing HS.
  • the control valve CV and the electric oil pump EOP cannot be arranged side by side in the direction of the rotation axis X, the control valve CV and the electric oil pump EOP will be lined up in the radial direction of the rotation axis .
  • the power transmission device 1 becomes larger in the radial direction of the rotation axis X (vehicle longitudinal direction).
  • the control valve CV and the electric oil pump EOP can be arranged side by side in the direction of the rotation axis X, it is possible to prevent the power transmission device 1 from increasing in size in the radial direction of the rotation axis X (vehicle longitudinal direction). can.
  • the second pump oil passage is an oil passage 626 (first oil passage) extending linearly within the partition wall portion 62; It has an oil passage 281 (second oil passage) that extends linearly within the bottom wall portion 691 and communicates with the oil passage 626 .
  • the oil passage 626 is a blind hole that opens into the second chamber S2.
  • the oil passage 281 is a blind hole that opens at the end of the bottom wall portion 691.
  • the linear oil passage 626 (first oil passage) and the linear oil passage 626 (first oil passage) can be connected by simply forming an oil hole in each wall (bottom wall 691, partition wall 62) so that the oil passage 281 (second oil passage) intersects with the oil passage 281 (second oil passage). can be merged. This makes it easier to form the oil passage compared to the case where the electric oil pump EOP and the mechanical oil pump MOP are provided on the same wall.
  • the oil passage 626 is a linear machined hole whose tip end is closed and becomes a dead end, and whose base end opens into the second chamber S2.
  • the oil passage 281 is a linear machined hole whose tip is closed and has a dead end, and whose base end opens at the end of the bottom wall portion 691.
  • An oil passage connecting the strainer 10 and the electric oil pump EOP is formed by intersecting the two machined holes with dead ends.
  • the oil passage connecting the strainer 10 and the electric oil pump EOP can be easily formed by simply providing two linear machined holes so as to intersect with each other.
  • the mechanical oil pump MOP is supported by the partition wall 62 near the bottom wall 682 in the first chamber S1.
  • the mechanical oil pump MOP is disposed in the second chamber S2 at a position closest to the control valve CV.
  • the electric oil pump EOP is arranged close to the control valve CV. Therefore, when viewed from the control valve CV, the electric oil pump EOP is located next to the rotation axis X direction.
  • Mechanical oil pumps MOP are arranged adjacent to each other in the radial direction. Thereby, the lengths of the oil passages (oil passage 271, oil passage 629) connecting the electric oil pump EOP and the control valve CV and the oil passage 628 connecting the mechanical oil pump MOP and the control valve CV can be shortened. In this case, the time required to supply oil OL from the pump (mechanical oil pump MOP, electric oil pump EOP) to the control valve CV is shortened, so it is expected that the hydraulic responsiveness of the control valve CV will be improved.
  • the bottom wall portion 691 is formed so that the area where the oil passage 281 (second oil passage) is provided is thicker than the other area.
  • the thickened region of the bottom wall 691 also extends to the partition wall 62. Therefore, the thicker region of the bottom wall portion 691 also functions as a reinforcing rib for the bottom wall portion 691, so that the supporting strength of the electric oil pump EOP in the bottom wall portion 691 can be ensured.
  • oil passage 271, oil passage 629) that connects the electric oil pump EOP and the control valve CV.
  • oil passage 281 second oil passage
  • oil passage 271 third oil passage
  • the bottom wall portion 691 is also formed thick in the region where the oil passage 271 is provided.
  • the direction in which the oil passage 281 bulges out is on one side of the bottom wall portion 691, and the direction in which the oil passage 271 bulges out is on the other side of the bottom wall portion 691.
  • the bulging direction of the area of the oil passage 281 is the third chamber S3 side located on one side of the bottom wall part 691, and the area of the oil passage 271 (the bulging part 28) is the bulging direction.
  • the direction in which the protruding portion 27) expands is opposite to the third chamber S3.
  • a peripheral wall portion 71 surrounding the outer periphery of the third chamber S3; It has a rib 29 that bulges from the bottom wall portion 691 toward the peripheral wall portion 71 side.
  • the peripheral wall portion 71 is connected to the partition wall portion 62 and is provided with a gap between it and the bottom wall portion 691.
  • the rib 29 is a gap between the peripheral wall part 71 and the bottom wall part 691 (a gap in the radial direction of the rotation axis X), and is provided across the bottom wall part 691 and the partition wall part 62.
  • the third chamber S3 has a smaller area in the adjacent direction (radial direction of the rotation axis X) between the first chamber S1 and the second chamber S2 than the first chamber S1. There is a gap left between them, and there is ample space.
  • the thick region of the bottom wall portion 691 as the rib 29 that bulges into the space between the third chamber S3 and the second chamber S2, the unused space around the housing HS can be saved. The rigidity of the bottom wall portion 691 can be ensured while being used effectively.
  • the rib 29 is formed in such a shape that the bulge width W19 from the bottom wall portion 691 increases as it approaches the partition wall portion 62.
  • control valve CV In the second chamber S2, the control valve CV is arranged in such a manner that a plurality of pressure regulating valves SP are arranged vertically.
  • the control valve CV When viewed from the direction of the rotation axis X of the power transmission device 1, the control valve CV is provided in a positional relationship overlapping with the electric oil pump EOP.
  • control valve CV is arranged in such a way that the plurality of pressure regulating valves SP are lined up in the horizontal direction, the control valve CV will take up a large amount of space in the horizontal direction.
  • the control valve CV is arranged so that the plurality of pressure regulating valves SP are lined up in the vertical direction, it is easier to install the control valve than when the control valve is arranged so that the plurality of pressure regulating valves are lined up in the horizontal direction. Less horizontal range is required. As a result, the thickness of the second chamber S2 in the horizontal direction becomes thinner, so that it is possible to suitably prevent the power transmission device 1 from increasing in size in the horizontal direction.
  • the electric oil pump EOP is placed vertically in the second chamber S2 with the rotation axis Z1 along the vertical direction, the electric oil pump An oil pump EOP can be provided. Thereby, even if the electric oil pump EOP is provided in the second chamber S2, the second chamber S2 does not become larger in the horizontal direction. This also effectively prevents the power transmission device 1 from increasing in size in the horizontal direction.
  • the power transmission device 1 transmits the rotation of the engine ENG to the drive wheels WH, WH is illustrated, but the power transmission device 1 transmits the rotation of the engine ENG and the motor (rotating electric machine).
  • the rotation may be transmitted to the drive wheels WH, WH.
  • a one-motor, two-clutch type (the motor is arranged between the engine ENG and the power transmission device, the first clutch is arranged between the engine ENG and the motor, and the second clutch is arranged inside the power transmission device 1)
  • It may also be a power transmission device of the following type.
  • the power transmission device 1 has a speed change function, but the power transmission mechanism does not have a speed change function and simply decelerates (or may speed up). It's okay. If the power transmission device does not have a speed change function and is configured to decelerate the rotation of the motor and transmit it to the drive wheels WH, the oil OL for cooling the motor and the deceleration A hydraulic control circuit for supplying oil OL for lubricating the mechanism is arranged in the second chamber S2 together with the electric oil pump EOP. Further, in the above embodiment, the control unit of the power transmission device 1 is provided with the control valve CV, but the power transmission device 1 does not have a speed change mechanism, and the drive source is not the engine ENG. In the case of a motor (rotating electric machine), it may be a control unit including an inverter or the like that drives and controls the motor.
  • Power transmission device 2 Forward/reverse switching mechanism (power transmission mechanism) 3 Variator (power transmission mechanism) 4 Reduction mechanism (power transmission mechanism) 5 Differential device (power transmission mechanism) 29 Rib 69 Partition wall portion (first support wall) 682 Wall part (second support wall) 682B Wall part (third support wall) 626 Oil path (second pump oil path: first oil path) 626a Base end 281 Oil passage (second pump oil passage: second oil passage) 281a Base end 271 Oil passage (third oil passage) 629 Oil road (3rd oil road) CV control valve HS housing (case) MOP mechanical oil pump (1st pump) EOP electric oil pump (second pump) PL plug S1 1st chamber S2 2nd chamber S3 3rd chamber

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Details Of Gearings (AREA)
PCT/JP2023/011618 2022-03-23 2023-03-23 動力伝達装置 WO2023182455A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202380028302.7A CN118829810A (zh) 2022-03-23 2023-03-23 动力传递装置
US18/846,999 US20250207661A1 (en) 2022-03-23 2023-03-23 Power transmission device
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