WO2024075616A1 - 車両用駆動装置 - Google Patents
車両用駆動装置 Download PDFInfo
- Publication number
- WO2024075616A1 WO2024075616A1 PCT/JP2023/035269 JP2023035269W WO2024075616A1 WO 2024075616 A1 WO2024075616 A1 WO 2024075616A1 JP 2023035269 W JP2023035269 W JP 2023035269W WO 2024075616 A1 WO2024075616 A1 WO 2024075616A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electric machine
- flow path
- rotating electric
- case
- axial direction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
-
- 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
- F16H57/0467—Elements of gearings to be lubricated, cooled or heated
- F16H57/0476—Electric machines and gearing, i.e. joint lubrication or cooling or heating thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Definitions
- This disclosure relates to a vehicle drive system.
- a technique is known in which a flow path forming member that forms a refrigerant flow path (cooling water passage) around a rotating electrical machine is fastened to a case (outer case) that pairs with the flow path forming member (inner case).
- the present disclosure aims to fasten a rotating electric machine together with a flow path forming member to a case without significantly increasing the size of the vehicle drive device.
- a rotating electric machine a case that houses the rotating electric machine; a flow passage forming member that is disposed between an outer circumferential surface of the rotating electric machine and an inner circumferential surface of the case and that forms a coolant flow passage through which a coolant passes,
- the flow passage forming member has a cylindrical shape and is fastened to the case at one end side in an axial direction,
- a vehicle drive device is provided in which, assuming a rectangle that circumscribes the outer shape of the rotating electric machine when viewed in the axial direction and has two sides parallel in the vertical direction, the fastening portion of the flow path forming member to the case overlaps at least one of the four corners of the rectangle when viewed in the axial direction.
- the present disclosure makes it possible to fasten the rotating electric machine together with the flow path forming member to the case without significantly increasing the size of the vehicle drive device.
- FIG. 1 is a schematic top view showing a state in which a vehicle drive device is mounted in a vehicle.
- FIG. 2 is a cross-sectional view of the vehicle drive device.
- FIG. 1 is a skeleton diagram showing a vehicle drive device. 1 is a side view that illustrates a vehicle drive device according to an embodiment of the present invention;
- FIG. 5 is an enlarged view of part Q4 in FIG. 4 .
- 3 is a schematic diagram of a refrigerant flow path formed by a flow path forming member.
- FIG. 3 is an enlarged view of part Q6 in FIG. 2.
- FIG. 2 is an explanatory diagram of a preferred arrangement of fastening portions, and is a side view that generally illustrates the vehicle drive device according to the present embodiment.
- FIG. 8 is a schematic diagram showing a partial arrangement of fastening portions according to a comparative example superimposed by dotted lines on the picture of FIG. 7 .
- FIG. 13 is a side view illustrating a preferred arrangement of the fastening portion, and is a schematic diagram showing the relationship with the wiring connector.
- 2 is a side view showing the vehicle drive device according to the embodiment, viewed from the A2 side.
- FIG. 1 is an explanatory diagram of a preferred arrangement of fastening portions, and is a side view that generally illustrates the vehicle drive device according to the present embodiment.
- FIG. 8 is a schematic diagram showing a partial arrangement of fastening portions according to a comparative example superimposed by dotted lines on the picture of FIG. 7 .
- FIG. 13 is
- the Y direction corresponds to the up-down direction of the vehicle drive device 100 in use, that is, the up-down direction when the vehicle drive device 100 is arranged in the orientation in the use state.
- the Y1 side and the Y2 side correspond to the upper and lower sides along the Y direction.
- the up-down direction does not necessarily have to be parallel to the vertical direction, but only needs to have a predominantly vertical component.
- the up-down direction in the following description may be interpreted as the up-down direction of the vehicle drive device 100 alone (product) in a flat-laid state (the same applies to the horizontal direction).
- each component in the following description represents the directions when they are assembled to the vehicle drive device 100.
- the terms related to the dimensions, arrangement direction, arrangement position, etc. of each component are concepts that include a state in which there is a difference due to an error (an error that can be tolerated in manufacturing).
- the A direction corresponds to the axial direction, and in FIG. 2, etc., the A1 side and the A2 side along the A direction are defined.
- the X direction (see FIG. 3, etc.) is a direction perpendicular to both the A direction and the Y direction, and in FIG. 3, etc., the X1 side and the X2 side along the X direction are defined.
- driving connection refers to a state in which two rotating elements are connected so as to be able to transmit a driving force (synonymous with torque), and includes a state in which the two rotating elements are connected so as to rotate as a unit, or a state in which the two rotating elements are connected so as to be able to transmit a driving force via one or more transmission members.
- Such transmission members include various members (e.g., shafts, gear mechanisms, belts, chains, etc.) that transmit rotation at the same speed or at a variable speed.
- the transmission members may also include engagement devices (e.g., friction engagement devices, meshing engagement devices, etc.) that selectively transmit rotation and driving force.
- communication refers to a state in which two spatial elements are fluidly connected to each other. In other words, it refers to a state in which a fluid can pass between the two spatial elements.
- the two spatial elements may be directly connected to each other, or indirectly connected to each other (i.e., via another spatial element).
- rotating electric machine is used as a concept that includes both motors (electric motors), generators (electric generators), and motor-generators that function as both motors and generators as necessary.
- overlapping when viewed in a specific direction means that when an imaginary line parallel to the line of sight is moved in each direction perpendicular to the imaginary line, there is at least a part of an area where the imaginary line intersects with both of the two components.
- arrangement areas in a specific direction overlap means that at least a part of the arrangement area in a specific direction of one component is included within the arrangement area in a specific direction of the other component.
- FIG. 1 is a schematic diagram of a top view showing the vehicle drive device 100 mounted in a vehicle VC.
- FIG. 2 is a cross-sectional view of the vehicle drive device 100.
- FIG. 2A is a skeleton diagram showing the vehicle drive device 100.
- the vehicle drive device 100 includes a rotating electric machine 1, a pair of output members 6 each drivingly connected to a pair of wheels W (see FIG. 1), and a transmission mechanism 3 that transmits driving force between the rotating electric machine 1 and the pair of output members 6.
- the vehicle drive device 100 further includes a case 2 that houses the rotating electric machine 1.
- the case 2 also houses the pair of output members 6 and the transmission mechanism 3.
- the case 2 may house only one of the pair of output members 6.
- the vehicle drive device 100 can be used in any vehicle having a rotating electric machine 1, such as an electric vehicle or a hybrid vehicle, and can be used in any vehicle with a drive system such as front-wheel drive or rear-wheel drive.
- the drive source may be only an engine (internal combustion engine).
- the first output member 61 which is one of the pair of output members 6, is drivingly connected to the first wheel W1, which is one of the pair of wheels W
- the second output member 62 which is the other of the pair of output members 6, is drivingly connected to the second wheel W2, which is the other of the pair of wheels W.
- the vehicle VC on which the vehicle drive device 100 is mounted includes a first drive shaft 63 that rotates integrally with the first wheel W1 and a second drive shaft 64 that rotates integrally with the second wheel W2.
- the first drive shaft 63 is connected to the first wheel W1 via, for example, a constant velocity joint
- the second drive shaft 64 is connected to the second wheel W2 via, for example, a constant velocity joint.
- the first output member 61 is connected to the first drive shaft 63 so as to rotate integrally with the first drive shaft 63, and the second output member 62 is connected to the second drive shaft 64 so as to rotate integrally with the second drive shaft 64.
- the first output member 61 may be in the form of an intermediate shaft.
- the vehicle drive device 100 transmits the output torque of the rotating electric machine 1 to a pair of wheels W via a pair of output members 6, thereby driving the vehicle VC on which the vehicle drive device 100 is mounted.
- the rotating electric machine 1 is a driving force source for the pair of wheels W.
- the pair of wheels W is a pair of left and right wheels on the vehicle VC (e.g., a pair of left and right front wheels, or a pair of left and right rear wheels).
- the rotating electric machine 1 may be, for example, an AC rotating electric machine driven by three-phase AC.
- the rotating electric machine 1 and the pair of output members 6 are arranged on two parallel axes (specifically, a first axis C1 and a second axis C2). Specifically, the rotating electric machine 1 is arranged on the first axis C1, and the pair of output members 6 are arranged on a second axis C2 different from the first axis C1.
- the first axis C1 and the second axis C2 are axes (virtual axes) arranged parallel to each other.
- the transmission mechanism 3 includes an output gear (ring gear) 30 that is drivingly connected to at least one of the pair of output members 6, and is coaxial with the pair of output members 6 (i.e., on the second axis C2).
- the rotating electric machine 1 is, for example, an inner rotor type.
- a rotor 14 that can rotate around a first axis C1 is arranged radially inside a stator 11 (see FIG. 2).
- the transmission mechanism 3 includes a reduction mechanism 34 in the power transmission path between the rotating electric machine 1 and the output gear 30.
- the reduction mechanism 34 is optional and may include a reduction mechanism using a counter gear, a reduction mechanism using a planetary gear, or the like.
- the reduction mechanism 34 includes a planetary gear mechanism, and the reduction mechanism 34 is arranged coaxially with the rotating electric machine 1.
- the output gear (carrier) 342 of the reduction mechanism 34 radially meshes with the output gear 30 of the differential gear mechanism 5.
- Such a vehicle drive device 100 can have a compact configuration consisting of two shafts (first shaft C1 and second shaft C2). In a modified example, the vehicle drive device 100 may have three or more shafts.
- the reduction mechanism 34 is arranged coaxially with the rotating electric machine 1 (i.e., on the first axis C1) in a manner that the reduction mechanism 34 is drivingly connected to the rotating electric machine 1.
- the rotor 14 of the rotating electric machine 1 rotates integrally with the input member 16 together with the sun gear 341 of the reduction mechanism 34.
- the transmission mechanism 3 further includes a differential gear mechanism 5.
- the differential gear mechanism 5 distributes the driving force transmitted from the rotating electric machine 1 to a pair of output members 6.
- the differential gear mechanism 5 distributes the rotation of the output gear 30 to a first side gear 51 and a second side gear 52.
- the differential gear mechanism 5 may be arranged coaxially with the pair of output members 6 (i.e., on the second axis C2).
- the differential gear mechanism 5 may be a bevel gear type differential gear mechanism, and the output gear 30 may be connected to a differential case portion 50 included in the differential gear mechanism 5 so as to rotate integrally with the differential case portion 50.
- FIG. 3 is a side view showing a vehicle drive device 100 according to the present embodiment.
- the motor cover member 201 is omitted so that the state inside the motor housing chamber S1 can be seen.
- the inverter device 70 inside the inverter case portion 24 is shown by a dotted line.
- FIG. 4 is a perspective view of the flow path forming member 90. In FIG. 4 (as in FIG. 5), the positions of the inlet portion 95 and the outlet portion 96 relative to the refrigerant flow path 300 are shown in a schematic projection diagram (circular dashed dotted line).
- FIG. 4A is an enlarged view of the Q4 portion in FIG. 4.
- FIG. 4A is an enlarged view of the Q4 portion in FIG. 4.
- FIG. 5 is a schematic diagram of the refrigerant flow path 300 formed by the flow path forming member 90, and is an explanatory diagram in which the outer peripheral surface of the flow path forming member 90 is developed on a plane.
- FIG. 6A is a cross-sectional view of a portion of the refrigerant flow path 300 (a portion along line A-A in FIG. 5).
- FIG. 6B is a side view showing a schematic positional relationship between the first output member 61 and the refrigerant supply portion 40 and the refrigerant discharge portion 42.
- Figure 6C is an enlarged view of part Q6 in Figure 2.
- the water-cooling structure of the rotating electric machine 1 is a structure for cooling the rotating electric machine 1 with cooling water.
- the cooling water may be water containing LLC (Long Life Coolant), for example, and may be circulated by a water pump (not shown).
- a heat dissipation section such as a radiator (not shown) may be provided in the cooling water circulation path.
- the cooling water may be used not only to cool the rotating electric machine 1, but also to cool other components, such as the inverter device 70 electrically connected to the rotating electric machine 1.
- the water-cooling structure of the rotating electric machine 1 may include a coolant supply section 40, a coolant discharge section 42, and a flow path forming member 90, as shown in FIG. 4.
- the refrigerant supply unit 40 is connected to the discharge side of, for example, a water pump (not shown) and supplies cooling water to a refrigerant flow path 300 (described below) formed by a flow path forming member 90.
- the coolant discharge section 42 is connected to, for example, the suction side of a water pump (not shown) and supplies (discharges) cooling water from a coolant flow path 300 (described below) formed by the flow path forming member 90 to the water pump (not shown).
- the refrigerant supply section 40 and the refrigerant discharge section 42 may be provided on the upper and lower sides of the first output member 61, as shown in FIG. 6B. In this case, the refrigerant supply section 40 and the refrigerant discharge section 42 can be established by effectively utilizing the space around the first output member 61.
- the flow path forming member 90 is cylindrical in shape with an inner circumferential surface that faces radially the outer circumferential surface of the rotating electric machine 1.
- the flow path forming member 90 forms a refrigerant flow path 300 around the rotating electric machine 1.
- the flow path forming member 90 may be made of a material with good thermal conductivity, such as aluminum.
- the flow path forming member 90 is fitted into the stator core 12 of the stator 11 by, for example, shrink fitting. This increases the adhesion (tightening margin) between the flow path forming member 90 and the stator core 12, and reduces the thermal resistance between the flow path forming member 90 and the stator core 12.
- the flow path forming member 90 may be formed integrally with the stator core 12 by casting in or the like.
- the flow path forming member 90 may also be formed as part of the case 2.
- the flow path forming member 90 is in the form of an inner case that is fastened to the case 2, as shown in FIG. 3, for example.
- the flow path forming member 90 has a plurality of fastening parts 500 at one axial end side, as shown in FIG. 3. A preferred example of the arrangement of the plurality of fastening parts 500 will be described later.
- the flow path forming member 90 is inserted into the cylindrical space (motor accommodating chamber S1) of the case 2. At this time, the outer peripheral surface of the flow path forming member 90 faces radially against the inner peripheral surface (the inner peripheral surface that bounds the multiple fastening portions 500) of the motor case portion 21 (see FIG. 2) of the case 2.
- the inner peripheral surface of the case 2 that surrounds the flow path forming member 90 in this manner is also referred to as the "flow path forming surface 209 of the case 2.”
- the inner diameter of the flow path forming surface 209 of the case 2 may be a constant value that is larger than the basic outer diameter of the stator core 12 by the basic thickness t0 of the flow path forming member 90 (see FIG. 6A).
- the flow path forming member 90 cooperates with the flow path forming surface 209 of the case 2 to form the refrigerant flow path 300.
- the refrigerant flow path 300 is formed in the radial direction between the outer peripheral surface of the flow path forming member 90 and the flow path forming surface 209 of the case 2.
- the coolant flow passage 300 may extend in the circumferential direction so that the cooling water flows in the circumferential direction over the entire circumferential direction.
- the coolant flow passage 300 may be formed so as to face the outer peripheral surface of the stator core 12 in the radial direction over the entire axial direction of the stator core 12 of the rotating electric machine 1.
- the coolant flow passage 300 is closed at both axial ends.
- a seal member 97 (see FIG. 6C) may be provided over the entire circumferential direction at both axial ends of the flow passage forming member 90 between the flow passage forming member 90 and the flow passage forming surface 209 of the case 2.
- the refrigerant flow path 300 is broadly divided into a first circumferential section SC1, a second circumferential section SC2, a third circumferential section SC3, and a fourth circumferential section SC4.
- the first circumferential section SC1 is a section that includes the inlet section 95.
- the refrigerant supply section 40 is connected to the inlet section 95. Therefore, cooling water is introduced into the refrigerant flow path 300 from the inlet section 95.
- the inlet section 95 may be in the form of an opening at the end of the refrigerant supply section 40.
- the second circumferential section SC2 is a section that includes the outlet section 96.
- the outlet section 96 is connected to the refrigerant discharge section 42. Therefore, the cooling water introduced into the refrigerant flow path 300 is discharged outside the refrigerant flow path 300 via the outlet section 96.
- the outlet section 96 may be in the form of an opening at the end of the refrigerant discharge section 42.
- the third circumferential section SC3 may be the section that extends between the first circumferential section SC1 and the second circumferential section SC2 in the circumferential direction and has the longest circumferential length.
- the flow path forming member 90 has a protrusion 91 that protrudes radially in a manner that reduces the cross-sectional area of the refrigerant flow path 300.
- the protrusion 91 is in the form of a convex stripe or rib that extends continuously in the circumferential direction, and is formed in a manner in which multiple protrusions are arranged in the axial direction.
- the protrusion 91 may be realized in other forms or arrangements.
- cylindrical protrusions may be arranged in a staggered pattern.
- the upper surface (radially outer surface) of the protrusion 91 may be in radial contact with the flow path forming surface 209 of the case 2, or may be slightly spaced from the flow path forming surface 209 of the case 2.
- the third circumferential section SC3 in the refrigerant flow path 300 is mainly formed by a portion in which the protrusion 91 is not formed.
- the fourth circumferential section SC4 may extend circumferentially between the first circumferential section SC1 and the second circumferential section SC2, and may be a section whose circumferential length is significantly shorter than that of the third circumferential section SC3.
- the flow path forming member 90 may not have a convex portion such as the convex portion 91 in the fourth circumferential section SC4.
- the flow path forming member 90 has a basically flat surface (outer peripheral surface) in the fourth circumferential section SC4.
- cooling water when cooling water is introduced into the inlet 95 of the refrigerant flow path 300, it flows in the axial direction in the first circumferential section SC1 (see arrow R52 in FIG. 5) and is distributed to the third circumferential section SC3 and the fourth circumferential section SC4 (see arrows R51 and R53 in FIG. 5). Then, the cooling water flowing in the circumferential direction in the third circumferential section SC3 (see arrows R51 and R55 in FIG. 5) flows in the axial direction (see arrow R54 in FIG. 5) when it reaches the second circumferential section SC2, and is discharged from the outlet 96.
- the cooling water flowing in the circumferential direction (which may also have an axial component) in the fourth circumferential section SC4 (see arrow R53 in FIG. 5) flows in the axial direction (see arrow R54 in FIG. 5) when it reaches the second circumferential section SC2, and is discharged from the outlet 96.
- the flow path structure in the fourth circumferential section SC4 may be adapted so that the pipeline loss coefficient in the fourth circumferential section SC4 is equivalent to the pipeline loss coefficient in the third circumferential section SC3.
- the flow path structure in the fourth circumferential section SC4 may be adapted so that the flow rate in the fourth circumferential section SC4 is equivalent to the flow rate in the third circumferential section SC3. This makes it possible to uniformize the flow rate (and the associated cooling capacity) of the coolant flowing through the refrigerant flow path 300 in the circumferential direction.
- the flow rate in the fourth circumferential section SC4 and the flow rate in the third circumferential section SC3 may correspond to the ratio of the circumferential length of the fourth circumferential section SC4 to the circumferential length of the third circumferential section SC3. This is because the longer the circumferential length, the more useful the cooling capacity (i.e., the lower the temperature of the cooling water can be maintained even downstream).
- the maximum radial width of the cross section of the refrigerant flow path 300 is smallest in the fourth circumferential section SC4 among the first circumferential section SC1 to the fourth circumferential section SC4, and is largest in the third circumferential section SC3. This allows the resistance in the fourth circumferential section SC4 to be relatively large, thereby ensuring an appropriate flow rate of the cooling water flowing through the third circumferential section SC3. Note that in this embodiment, since the third circumferential section SC3 is provided with a convex portion 91, the maximum radial width of the cross section of the refrigerant flow path 300 in the third circumferential section SC3 occurs in a portion that does not have a convex portion 91.
- the flow path forming member 90 is disposed between the stator core 12 and the flow path forming surface 209 of the case 2, and the radial distance between the stator core 12 and the flow path forming surface 209 of the case 2 is approximately constant (i.e., a constant value corresponding to the basic thickness t0) throughout the entire circumferential direction. Therefore, in this embodiment, the above-mentioned relationships of h4 ⁇ h1 ⁇ h3 and h4 ⁇ h2 ⁇ h3 can be realized by changing the thickness of the flow path forming member 90.
- the portion of the flow path forming member 90 that forms the refrigerant flow path 300 is the portion through which the refrigerant actually passes, and may be, for example, a portion in a range that faces radially relative to the stator core 12, or a portion in an axial range between the inlet portion 95 and the outlet portion 96.
- the flow passage forming member 90 is shrink-fitted, and stress concentration during shrink-fitting is likely to become a problem.
- the flow passage forming member 90 can thermally shrink due to the effects of heat from the stator core 12 and cooling water, and thermal stress is likely to occur.
- the first circumferential section SC1 and the second circumferential section SC2 can mitigate this thickness difference.
- the convex portion 91 in the flow passage forming member 90 also creates a difference in thickness, so stress concentration is likely to occur at the edge of the convex portion 91, etc.
- the circumferential end position of the convex portion 91 is set at the boundary between the third circumferential section SC3 and the first circumferential section SC1 and the second circumferential section SC2, stress concentration is likely to occur at the boundary.
- the convex portion 91 preferably terminates at the first circumferential section SC1 and the second circumferential section SC2, as shown in Figures 4 and 5. That is, the convex portion 91 in the third circumferential section SC3 preferably extends continuously over a portion of the first circumferential section SC1 that is connected to the third circumferential section, and a portion of the second circumferential section SC2 that is connected to the third circumferential section SC3. This makes it possible to reduce stress concentration that may occur at the boundaries between the third circumferential section SC3 and the first circumferential section SC1 and second circumferential section SC2.
- the fourth circumferential section SC4 of the flow path forming member 90 is arranged to intersect with a straight line L6 that connects the axial center (second axis C2) of the first output member 61 and the axial center (first axis C1) of the rotating electric machine 1 when viewed in the axial direction (see FIG. 6B).
- This allows the refrigerant supply section 40 and the refrigerant discharge section 42 to be arranged above and below the axial center (second axis C2) of the first output member 61, as described above, and allows efficient use of space that could otherwise become dead space.
- FIG. 7 is a side view that shows a schematic of the vehicle drive device 100 according to this embodiment.
- FIG. 8 is a side view that shows a schematic of the relationship between the fastening portion 500 and the wiring connector 802, and is an explanatory diagram of a preferred arrangement of the fastening portion 500.
- the fastening portion 500 and the wiring connector 802 that are arranged at different axial positions are shown in the same side view for the sake of explanation.
- the outer shape of the rotating electric machine 1 relating to the rectangle 600 may be the outer shape of the stator core 12 (basic outer shape that is a circle centered on the axis of the rotating electric machine 1).
- the fastening portion 500 is provided at the end of the A1 side of the flow path forming member 90 as shown in Figs. 4 and 7.
- the fastening portion 500 is formed to protrude radially outward from the circular outer shape of the flow path forming member 90 when viewed in the axial direction.
- the fastening portion 500 may be formed integrally with the flow path forming member 90 or may be separate.
- the fastening portion 500 is fastened to the case 2 by a bolt (not shown) (see bolt hole BT4).
- the fastening portion 500 may be fastened to the end face of the axial A1 side of the motor case portion 21 (see Fig. 2) surrounding the rotating electric machine 1.
- the fastening portion 500 may be in the form of a plate, and may be brought into axial contact with the axial end face of the flow path forming member to restrain the axial displacement of the flow path forming member.
- a plate-shaped fastening portion may fit into a recess that may be formed on the axial end face of the flow path forming member, thereby restricting the circumferential displacement of the flow path forming member.
- the fastening portion 500 preferably overlaps at least one of the four corners CN1 to CN4 of the rectangle 600 when viewed in the axial direction.
- the fastening portion 500 overlaps the corner CN1 on the X1 side and the upper side (Y1 side) and the corner CN2 on the X1 side and the lower side (Y2 side) of the four corners CN1 to CN4 of the case 2 when viewed in the axial direction, as shown in FIG. 7.
- the fastening portion 500 overlapping the corner when viewed in the axial direction may be a state in which a part or the whole of the fastening portion 500 overlaps the corner when viewed in the axial direction.
- the fastening portion 500 overlapping the corner when viewed in the axial direction may be a state in which a bolt (not shown) (see bolt hole BT4) related to the fastening portion 500 overlaps the corner when viewed in the axial direction.
- the corner where the fastening portion 500 overlaps when viewed in the axial direction may be an area of the rectangle 600 outside the rotating electric machine 1 when viewed in the axial direction.
- the horizontal straight line Lh has an angle of 0 degrees or 180 degrees
- the vertical straight line Lv has an angle of 90 degrees or 270 degrees around the axis of the rotating electric machine 1.
- corners CN1 and CN3 are on the first straight line L1 (a straight line passing through the axis of the rotating electric machine 1) at an angle of 45 degrees (or 225 degrees)
- corners CN2 and CN3 are on the second straight line L2 (a straight line passing through the axis of the rotating electric machine 1) at an angle of 135 degrees (or 315 degrees).
- the fastening portion 500 overlaps with the corner (one of CN1 to CN4) when viewed in the axial direction" means that "the first straight line L1 or the second straight line L2 passing through the corner passes through the fastening portion 500 in the same quadrant as the corner, and the fastening portion 500 overlaps with the rotating electric machine 1 when viewed in the horizontal direction.”
- the first straight line L1 passes through the fastening portion 500 overlapping with the corner CN1 in the first quadrant
- the second straight line L2 passes through the fastening portion 500 overlapping with the corner CN2 in the second quadrant, and these two fastening portions 500 overlap with the rotating electric machine 1 when viewed in the horizontal direction.
- the fastening parts 500 are not sufficiently fixed to the flow path forming member 90 (fixed to the case 2), problems such as leakage of cooling water from the refrigerant flow path 300 formed by the flow path forming member 90 and infiltration of oil into the refrigerant flow path 300 may occur.
- the fastening parts 500' arranged at 120 degree intervals are shown by virtual dotted lines.
- the fastening parts 500' protrude from the outer shape of the case 2 (outer shape when viewed in the axial direction), this is likely to result in an increase in the size of the case 2 (and therefore the size of the vehicle drive device 100).
- the first output member 61 is arranged in the vicinity of the rotating electric machine 1, as in this embodiment, it is difficult to establish three or more fastening parts without interference between the first output member 61 and the fastening parts.
- the three fastening portions 500 overlap the corner CN1 on the X1 side and the upper side (Y1 side) and the corner CN2 on the X1 side and the lower side (Y2 side) when viewed in the axial direction.
- the three fastening portions 500 can be arranged at relatively equal intervals along the circumferential direction without increasing the size of the case 2 (and therefore the size of the vehicle drive device 100) and without interfering with the first output member 61.
- the relatively equal intervals can be, for example, angular intervals significantly different from 120 degrees, but the relatively equal intervals ensure the necessary fixing strength throughout the entire circumferential direction.
- the center (on the first axis C1) of the flow passage forming member 90 can be arranged within a triangle connecting the bolts (not shown) (see bolt hole BT4) of the three fastening portions 500. This ensures high reliability in fixing the flow path forming member 90 by the fastening portion 500 while reducing the size of the case 2 (and therefore the size of the vehicle drive device 100).
- two bolts (not shown) (see bolt hole BT4) are fastened to each of two of the three fastening parts 500. This further increases the reliability of the fastening parts 500 in fixing the flow path forming member 90.
- the area that overlaps with corner CN1 of the four corners CN1 to CN4 is suitable as an area for wiring to the inverter case part 24. This is because this area is on the upper side where the inverter case part 24 is arranged. In particular, when the inverter case part 24 extends further toward the X1 side than the first axis C1 when viewed in the axial direction, it becomes easier to route wiring inside the inverter case part 24.
- a connector 802 for wiring an electronic component is provided in an area between the rotating electric machine 1 and the reduction mechanism 34 in the axial direction and overlapping with the corner portion CN1 when viewed in the axial direction.
- the electronic component may be a low-voltage electronic component arranged in the motor housing chamber S1, and may include, for example, a sensor (e.g., a resolver) that detects the rotation angle of the rotating electric machine 1, an oil temperature sensor, etc.
- one of the three fastening portions 500 overlaps with the wiring connector 802 at the corner CN1 when viewed in the axial direction.
- This allows the wiring connector 802 and the fastening portion 500 to be efficiently established in a manner that reduces the size of the case 2 (and therefore the size of the vehicle drive device 100).
- the wiring connector 802 is provided such that the case 2 extends to a region that overlaps the corner CN1 when viewed in the axial direction
- by arranging the fastening portion 500 so that it overlaps the corner CN1 when viewed in the axial direction, an increase in the size of the case 2 caused by the fastening portion 500 can be prevented.
- FIG. 9 is a side view showing the vehicle drive device 100 according to this embodiment, viewed from the A2 side.
- the portion of the transmission mechanism housing S2 that houses the reduction mechanism 34 is also referred to as the “reduction mechanism housing S21”
- the portion that houses the differential gear mechanism 5 is also referred to as the “differential gear housing S22.”
- the catch tank 920 extends radially outward from the axial wall portion 9201 around the reduction mechanism 34 in the reduction mechanism housing chamber S21, and has an inlet 921 at a position where it can capture the oil scooped up by the rotation of the output gear 30.
- the catch tank 920 has a discharge port 922 that opens into the differential gear housing chamber S22 at the bottom.
- the end portion of the return flow passage 292 on the axial A2 side may be provided near the discharge port 922. This makes it possible to relatively quickly return the oil used to cool the coil end 13 in the space S11 (see FIG.
- the catch tank 920 may also be connected to the axial oil passage 15a of the rotor shaft 15, etc., so as to supply oil to the axial oil passage 15a of the rotor shaft 15.
- the lower part of the catch tank 920 refers to the part below the center of the catch tank 920 in the vertical direction, for example, the part below the first axis C1.
- the return flow passage 290 (arrangement is shown typically by a circle in FIG. 9) has an A2 end that opens into the differential gear housing chamber S22, and an A1 end that communicates with the output shaft housing chamber S3.
- the return flow passage 292 (arrangement is shown typically by a circle in FIG. 9) has an axial A1 end that communicates with the space S11 of the motor housing chamber S1, and an axial A2 end that communicates with the lower part of the transmission mechanism housing chamber S2 (the lower part of the catch tank 920).
- An oil temperature sensor 98 (arrangement is shown typically by a circle in FIG. 9) is provided at the lower part of the catch tank 920. In this case, the oil temperature sensor 98 is provided near the discharge port 922 of the catch tank 920. This reduces the possibility that the oil temperature sensor 98 will be above the oil level depending on the running state of the vehicle, thereby improving the reliability of the sensor information from the oil temperature sensor 98.
- Oil scooped up by the rotation of the output gear 30 (see FIG. 2) of the differential gear mechanism 5 is introduced from the transmission mechanism housing chamber S2 into the output shaft housing chamber S3.
- the oil then flows downward due to gravity, lubricating the bearing BR2 on the A1 side that supports the first output member 61, and is then returned from the output shaft housing chamber S3 to the differential gear housing chamber S22 via the end of the return flow passage 290 (the end on the axial A2 side) located below the second shaft C2. This makes it possible for the oil to be scooped up again by the rotation of the output gear 30 of the differential gear mechanism 5.
- the oil scooped up by the rotation of the output gear 30 of the differential gear mechanism 5 is introduced into the axial oil passage 15a of the rotor shaft 15 via the catch tank 920.
- the catch tank 920 has a communication port 75 at the top.
- the communication port 75 is the radially outer opening of the radial communication passage 74, and the radially inner end of the communication passage 74 is connected to the axial oil passage 16a of the input member 16.
- the oil scooped up by the rotation of the output gear 30 of the differential gear mechanism 5 enters the communication passage 74 from the communication port 75 of the catch tank 920, and is then supplied to the axial oil passage 15a of the rotor shaft 15 via the axial oil passage 16a.
- the oil supplied to the axial oil passage 15a is sprayed from the spray hole 15b to the coil end 13 of the rotating electric machine 1, as described above. This allows the coil end 13 to be efficiently cooled by the oil scooped up by the rotation of the output gear 30 of the differential gear mechanism 5.
- the oil sprayed onto the coil end 13 in the space S12 of the motor housing S1 is returned from the space S12 to the transmission mechanism housing S2 through the end (axial A2 end) of the return flow passage 290 located below the second axis C2.
- the oil sprayed onto the coil end 13 in the space S11 of the motor housing S1 is returned from the space S11 to the transmission mechanism housing S2 through the end (axial A2 end) of the return flow passage 292 located below the second axis C2.
- the oil returned to the transmission mechanism housing S2 in this way is returned to the differential gear housing S22 from the discharge port 922 below the second axis C2 in the catch tank 920. This allows the oil to be scooped up again by the rotation of the output gear 30 of the differential gear mechanism 5.
- the catch tank 920 is formed in such a manner that it overlaps the fastening portion 500 when viewed in the axial direction A2.
- the fastening portion 500 which is not visible when viewed from the X2 side, is shown in a schematic perspective view with a broken line.
- the catch tank 920 overlaps the two fastening portions 500 on the upper and lower sides of the X1 side when viewed in the axial direction A2, but may overlap only one of the two fastening portions 500 (for example, the upper fastening portion 500).
- FIG. 9 the fastening portion 500
- the catch tank 920 overlaps substantially the entire fastening portion 500 on the X1 side and the upper side when viewed in the axial direction A2, but may overlap a part of the fastening portion 500 on the X1 side and the upper side.
- the catch tank 920 overlaps a part of the fastening portion 500 on the X1 side and the lower side when viewed in the axial direction A2, but may overlap substantially the entire fastening portion 500 on the X1 side and the lower side.
- This positional relationship between the catch tank 920 and the fastening portion 500 allows for effective use of the dead space created by the shape of the reduction mechanism housing chamber S21. That is, in the motor housing chamber S1, the inside of the outer boundary of the size of the case 2 determined by the catch tank 920 (the outer boundary when viewed in the axial direction A2) becomes usable space (dead space) without increasing the size of the case 2. Therefore, by arranging the fastening portion 500 in a position overlapping the catch tank 920 when viewed in the axial direction, this dead space can be effectively utilized. This makes it possible to prevent an increase in the size of the case 2 caused by the fastening portion 500 (particularly an increase in the size toward the X1 side, or an increase in the size toward the Y1 side or Y2 side).
- 100 Vehicle drive device, 1: Rotating electric machine, 2: Case, 90: Flow path forming member, 300: Coolant flow path, 34: Reduction mechanism (transmission mechanism), 5: Differential gear mechanism (transmission mechanism), 61: First output member (shaft member), 500: Fastening portion (first fastening portion, second fastening portion), 802: Wiring connector, 600: Rectangle, CN1 to CN4: Corner, C1: First shaft (shaft center of rotating electric machine), C2: Second shaft (shaft center of shaft member), W: Wheel
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- Mechanical Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
前記回転電機を収容するケースと、
前記回転電機の外周面と前記ケースの内周面との間に配置され、冷媒が通る冷媒流路を形成する流路形成部材とを備え、
前記流路形成部材は、円筒状の形態を有し、軸方向の一端側で前記ケースに締結され、
軸方向に視て前記回転電機の外形に外接する矩形であって上下方向に平行な2辺を有する矩形を想定した場合に、前記ケースに対する前記流路形成部材の締結部は、軸方向に視て、前記矩形の4つの角部のうちの、少なくとも1つの角部に重なる、車両用駆動装置が提供される。
Claims (5)
- 回転電機と、
前記回転電機を収容するケースと、
前記回転電機の外周面と前記ケースの内周面との間に配置され、冷媒が通る冷媒流路を形成する流路形成部材とを備え、
前記流路形成部材は、円筒状の形態を有し、軸方向の一端側で前記ケースに締結され、
軸方向に視て前記回転電機の外形に外接する矩形であって上下方向に平行な2辺を有する矩形を想定した場合に、前記ケースに対する前記流路形成部材の締結部は、軸方向に視て、前記矩形の4つの角部のうちの、少なくとも1つの角部に重なる、車両用駆動装置。 - 前記回転電機に関連して設けられる電子部品の配線用コネクタを更に備え、
前記配線用コネクタは、軸方向に視て、前記少なくとも1つの角部に重なる、請求項1に記載の車両用駆動装置。 - 前記回転電機からの駆動力を軸部材を介して車輪に伝達する伝達機構を更に備え、
前記軸部材の軸心は、前記回転電機の軸心に対して平行であり、かつ、軸方向に交差する一方向の一方側にオフセットし、
前記少なくとも1つの角部は、上側、かつ、前記一方向の他方側の角部を含む、請求項1又は2に記載の車両用駆動装置。 - 前記締結部は、3箇所以上設けられ、
3箇所以上の前記締結部の2つは、前記4つの角部のうちの、前記一方向の他方側の2つに配置される、請求項3に記載の車両用駆動装置。 - 前記ケースは、更に前記伝達機構を収容し、かつ、前記伝達機構のギヤの回転により掻き揚げられる油を捕捉するキャッチタンクを有し、
前記キャッチタンクは、軸方向に視て、前記少なくとも1つの角部に重なる、請求項3に記載の車両用駆動装置。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23874743.0A EP4576513A4 (en) | 2022-10-07 | 2023-09-27 | VEHICLE TRAINING DEVICE |
| JP2024555757A JPWO2024075616A1 (ja) | 2022-10-07 | 2023-09-27 | |
| CN202380069002.3A CN119999053A (zh) | 2022-10-07 | 2023-09-27 | 车用驱动装置 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022-162120 | 2022-10-07 | ||
| JP2022162120 | 2022-10-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024075616A1 true WO2024075616A1 (ja) | 2024-04-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2023/035269 Ceased WO2024075616A1 (ja) | 2022-10-07 | 2023-09-27 | 車両用駆動装置 |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4576513A4 (ja) |
| JP (1) | JPWO2024075616A1 (ja) |
| CN (1) | CN119999053A (ja) |
| WO (1) | WO2024075616A1 (ja) |
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|---|---|---|---|---|
| JP2011036024A (ja) * | 2009-07-31 | 2011-02-17 | Aisin Aw Co Ltd | ステータの冷却構造 |
| WO2013069319A1 (ja) * | 2011-11-11 | 2013-05-16 | 株式会社安川電機 | 回転電機及び車両 |
| JP2018057243A (ja) * | 2016-09-30 | 2018-04-05 | アイシン・エィ・ダブリュ株式会社 | 車両用駆動装置 |
| JP2020054201A (ja) * | 2018-09-28 | 2020-04-02 | 日本電産トーソク株式会社 | モータユニット |
| US20200235640A1 (en) | 2019-01-22 | 2020-07-23 | Ford Global Technologies, Llc | Methods and systems for an electric motor cooling jacket |
| WO2020213052A1 (ja) * | 2019-04-16 | 2020-10-22 | 日産自動車株式会社 | 回転電機 |
| WO2021166171A1 (ja) * | 2020-02-20 | 2021-08-26 | 日産自動車株式会社 | 回転電機及び回転電機の車載構造 |
| WO2022118372A1 (ja) * | 2020-12-01 | 2022-06-09 | 三菱電機株式会社 | 回転電機 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010008584A1 (de) * | 2010-02-19 | 2011-08-25 | Magna Powertrain Ag & Co Kg | Elektrische Antriebseinheit |
| JP5594350B2 (ja) * | 2012-11-27 | 2014-09-24 | ダイキン工業株式会社 | 電動機 |
| JP6314158B2 (ja) * | 2013-12-27 | 2018-04-18 | 日立オートモティブシステムズ株式会社 | 回転電機 |
| JP6982551B2 (ja) * | 2018-06-19 | 2021-12-17 | 日立Astemo株式会社 | 電動機の冷却装置 |
-
2023
- 2023-09-27 CN CN202380069002.3A patent/CN119999053A/zh active Pending
- 2023-09-27 EP EP23874743.0A patent/EP4576513A4/en active Pending
- 2023-09-27 WO PCT/JP2023/035269 patent/WO2024075616A1/ja not_active Ceased
- 2023-09-27 JP JP2024555757A patent/JPWO2024075616A1/ja active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011036024A (ja) * | 2009-07-31 | 2011-02-17 | Aisin Aw Co Ltd | ステータの冷却構造 |
| WO2013069319A1 (ja) * | 2011-11-11 | 2013-05-16 | 株式会社安川電機 | 回転電機及び車両 |
| JP2018057243A (ja) * | 2016-09-30 | 2018-04-05 | アイシン・エィ・ダブリュ株式会社 | 車両用駆動装置 |
| JP2020054201A (ja) * | 2018-09-28 | 2020-04-02 | 日本電産トーソク株式会社 | モータユニット |
| US20200235640A1 (en) | 2019-01-22 | 2020-07-23 | Ford Global Technologies, Llc | Methods and systems for an electric motor cooling jacket |
| WO2020213052A1 (ja) * | 2019-04-16 | 2020-10-22 | 日産自動車株式会社 | 回転電機 |
| WO2021166171A1 (ja) * | 2020-02-20 | 2021-08-26 | 日産自動車株式会社 | 回転電機及び回転電機の車載構造 |
| WO2022118372A1 (ja) * | 2020-12-01 | 2022-06-09 | 三菱電機株式会社 | 回転電機 |
Non-Patent Citations (1)
| Title |
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| See also references of EP4576513A4 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN119999053A (zh) | 2025-05-13 |
| JPWO2024075616A1 (ja) | 2024-04-11 |
| EP4576513A4 (en) | 2025-12-10 |
| EP4576513A1 (en) | 2025-06-25 |
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