WO2023190421A1 - 車両用駆動装置 - Google Patents
車両用駆動装置 Download PDFInfo
- Publication number
- WO2023190421A1 WO2023190421A1 PCT/JP2023/012354 JP2023012354W WO2023190421A1 WO 2023190421 A1 WO2023190421 A1 WO 2023190421A1 JP 2023012354 W JP2023012354 W JP 2023012354W WO 2023190421 A1 WO2023190421 A1 WO 2023190421A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- oil
- axial
- axial direction
- oil passage
- storage chamber
- 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
Links
Classifications
-
- 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
-
- 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
- F16H57/045—Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
-
- 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
- F16H57/04—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
- F16H57/045—Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
- F16H57/0453—Section walls to divide a gear sump
-
- 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
- F16H57/0457—Splash lubrication
-
- 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
- F16H57/0469—Bearings or seals
- F16H57/0471—Bearing
-
- 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
-
- 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
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0482—Gearings with gears having orbital motion
- F16H57/0483—Axle or inter-axle differentials
Definitions
- the present disclosure relates to a vehicle drive device.
- the transmission mechanism includes a case that forms a first storage chamber that accommodates the rotating electrical machine and a second storage chamber that accommodates the transmission mechanism, and the oil that accumulates at the bottom of the second storage chamber is scraped up by the rotation of the gears of the transmission mechanism.
- the technology for supplying various types of bearings is known.
- a communication oil passage that communicates the lower part of the first storage chamber and the lower part of the second storage chamber is formed in the partition wall of the case that partitions the first storage chamber and the second storage chamber in the axial direction. There is.
- the communicating oil passage is formed in the partition wall of the case, so depending on the posture and behavior of the vehicle, the lower part of the first storage chamber and the lower part of the second storage chamber may not be properly connected. There is a risk that it may not be possible to secure a sufficient amount of oil. Specifically, oil in the case moves back and forth between the lower part of the first storage chamber and the lower part of the second storage chamber via a communication oil passage depending on the posture and behavior of the vehicle. In the case of a communicating oil passage as in the prior art, the amount of oil tends to be too large on one side of the first storage chamber and the second storage chamber (too small on the other side). For example, if there is a shortage of oil in the second storage chamber, there will be a shortage of oil scraped up by the rotation of the gears, and there is a risk that various bearings will lack lubrication.
- the present disclosure provides a communication oil passage that communicates between the first storage chamber and the second storage chamber, and even when the posture and behavior of the vehicle change variously, the first storage chamber and the second storage chamber can be connected to each other. 2
- the purpose is to secure an appropriate amount of oil in the storage room.
- a rotating electrical machine having a rotating shaft extending in an axial direction; a transmission mechanism that transmits the driving force from the rotating electric machine to the wheels; a case forming a first accommodation chamber that accommodates the rotating electrical machine on a first axial side and a second accommodation chamber that accommodates the transmission mechanism on a second axial side; comprising a communication oil passage communicating with the first storage chamber and the second storage chamber and through which oil passes;
- the lower part of the first storage chamber forms a first oil sump space in which oil accumulates
- the lower part of the second storage chamber forms a second oil sump space in which oil scraped up by the rotation of the gear forming the transmission mechanism accumulates
- the case includes a partition wall that at least partially partitions the first storage chamber and the second storage chamber in the axial direction and extends above the first oil sump space and the second oil sump space.
- the communication oil passage has a first opening that passes below the partition wall and opens into the first storage chamber at a first position away from the partition wall toward the first side in the axial direction.
- a vehicle drive device having a second opening that opens into the second storage chamber at a second position spaced from the partition wall toward the second axial side.
- a communication oil passage is formed that communicates the first storage chamber and the second storage chamber, and even when the posture or behavior of the vehicle changes in various ways, the first storage chamber and the second storage chamber can be connected to each other. It becomes possible to secure an appropriate amount of oil in the second storage chamber.
- FIG. 2 is a skeleton diagram of a vehicle drive system including a rotating electric machine and a power transmission mechanism.
- FIG. 2 is a schematic diagram of main parts of the vehicle drive device viewed along a first axis.
- 3 is a cross-sectional view of a main part of the vehicle drive device, taken along line AA in FIG. 2.
- FIG. FIG. 7 is a diagram showing a configuration (horizontal posture) according to a comparative example.
- FIG. 7 is a diagram showing a configuration (first tilted posture) according to a comparative example.
- FIG. 7 is a diagram showing a configuration (second tilted posture) according to a comparative example.
- FIG. 3 is a diagram showing a configuration (first tilted posture) according to the present embodiment.
- FIG. 7 is a diagram showing a configuration (second tilted posture) according to the present embodiment.
- FIG. 3 is an explanatory diagram of a method of forming an upward oil passage portion of a gear case.
- FIG. 1 is a skeleton diagram of a vehicle drive system 100 including a rotating electric machine 1 and a power transmission mechanism 7. As shown in FIG. In FIG. 1, an X direction, an X1 side (an example of a second side), and an X2 side (an example of a first side) along the X direction are defined.
- the X direction is parallel to the direction of the first axis A1 (hereinafter also referred to as the "axial direction").
- the vehicle drive system 100 includes a rotating electrical machine 1 that serves as a drive source for the wheels W, and a power transmission mechanism 7 provided in a power transmission path connecting the rotating electrical machine 1 and the wheels W.
- the power transmission mechanism 7 includes an input member 3, a counter gear mechanism 4, a differential gear mechanism 5, and left and right output members 6A and 6B.
- the input member 3 has an input shaft 31 and an input gear 32.
- the input shaft 31 is a rotating member that rotates around the first axis A1.
- the input gear 32 is a gear that transmits rotational torque (driving force) from the rotating electric machine 1 to the counter gear mechanism 4.
- the input gear 32 is provided on the input shaft 31 of the input member 3 so as to rotate integrally with the input shaft 31 of the input member 3.
- the counter gear mechanism 4 is arranged between the input member 3 and the differential gear mechanism 5 in the power transmission path.
- the counter gear mechanism 4 includes a counter shaft 41 , a first counter gear 42 , and a second counter gear 43 .
- the counter shaft 41 is a rotating member that rotates around the second axis A2.
- the second axis A2 extends parallel to the first axis A1.
- the first counter gear 42 is an input element of the counter gear mechanism 4.
- the first counter gear 42 meshes with the input gear 32 of the input member 3.
- the first counter gear 42 is connected to the counter shaft 41 so as to rotate integrally with the counter shaft 41.
- the second counter gear 43 is an output element of the counter gear mechanism 4.
- the second counter gear 43 is formed to have a smaller diameter than the first counter gear 42.
- the second counter gear 43 is provided on the counter shaft 41 so as to rotate integrally with the counter shaft 41.
- the differential gear mechanism 5 is arranged on the third axis A3 as its rotation axis.
- the third axis A3 extends parallel to the first axis A1.
- the differential gear mechanism 5 distributes the driving force transmitted from the rotating electrical machine 1 to the left and right output members 6A and 6B.
- the differential gear mechanism 5 includes a differential input gear 51 , and the differential input gear 51 meshes with the second counter gear 43 of the counter gear mechanism 4 .
- the differential gear mechanism 5 includes a differential case 52, and a pinion shaft, a pinion gear, left and right side gears, etc. are accommodated in the differential case 52.
- the left and right side gears are respectively connected to the left and right output members 6A, 6B so as to rotate integrally therewith.
- the left and right output members 6A and 6B are each drivingly connected to the left and right wheels W. Each of the left and right output members 6A, 6B transmits the driving force distributed by the differential gear mechanism 5 to the wheels W. Note that the left and right output members 6A, 6B may be composed of two or more members.
- the rotating electrical machine 1 drives the wheels W via the power transmission mechanism 7.
- other speed reduction mechanisms such as planetary gear sets, may be utilized.
- FIG. 2 is a schematic diagram of main parts of the vehicle drive device 17 viewed from the X1 side along the first axis A1.
- FIG. 3 is a cross-sectional view of a main part of the vehicle drive device 17, taken along line AA in FIG. 2.
- FIG. 2 is a simple explanatory diagram, and illustration of a part of the case 2 and the like is omitted.
- a Y direction and a Y1 side and a Y2 side along the Y direction are defined.
- a Z direction and a Z1 side and a Z2 side along the Z direction are defined.
- the Z direction is parallel to the vertical direction, and the Z1 side corresponds to the upper side.
- the first axis A1 and the third axis A3 are located at approximately the same height, and the second axis A2 is located above the first axis A1 and the third axis A3.
- Other positional relationships may be used.
- the first axis A1 may be located slightly below the third axis A3, and the first axis A1 and the second axis A2 may be located at approximately the same height.
- the vehicle drive device 17 includes a rotating electric machine 1 and a power transmission mechanism 7 housed in a case 2.
- the case 2 may be made of aluminum or the like, for example.
- the case 2 can be formed by casting or the like.
- Case 2 includes a motor case 250, a motor cover 252, a gear case 254, and an inverter cover 259 (see FIG. 2).
- the motor case 250 forms therein a motor housing chamber SP1 that houses the rotating electric machine 1. Note that forming the motor housing chamber SP1 inside means that it is at least partially surrounded by a wall, and does not need to be completely closed by a wall. This also applies to other gear storage chambers SP2 and the like.
- the motor case 250 has a peripheral wall portion surrounding the radially outer side of the rotating electrical machine 1 .
- the motor case 250 is an integrally molded member, but may be realized by combining a plurality of members.
- the motor case 250 has a partition wall 2500 that partitions the motor housing chamber SP1 and the gear housing chamber SP2 in the axial direction.
- the partition wall 2500 faces the bottom of the motor cover 252 in the axial direction.
- the partition wall portion 2500 may support bearings BR2 and BR3 on the inside in the radial direction.
- Bearing BR2 rotatably supports rotor shaft 11 in cooperation with bearing BR1 supported by motor cover 252.
- Bearing BR3 rotatably supports input shaft 31 in cooperation with bearing BR4 supported by gear case 254. Note that in a modification, one of the bearings BR2 and BR3 may be omitted.
- the motor cover 252 is coupled to the X2 side of the motor case 250 in the X direction.
- the motor cover 252 is in the form of a cover that covers the X2 side in the X direction in the motor housing chamber SP1.
- the motor cover 252 may cover the opening of the motor case 250 on the X2 side in the X direction in a manner that completely or almost completely closes it. Note that a part of the motor housing chamber SP1 on the X2 side in the X direction may be formed by the motor cover 252.
- the motor case 250 may form an inverter housing chamber SP3.
- An inverter device (not shown) that drives the rotating electrical machine 1 may be accommodated in the inverter accommodation chamber SP3.
- the inverter housing chamber SP3 may extend in the axial direction so as to be adjacent to the motor housing chamber SP1 and the gear housing chamber SP2 in the radial direction.
- the inverter cover 259 may be provided to cover the upper opening of the inverter storage chamber SP3. In this way, the inverter cover 259 may form the inverter housing chamber SP3, which is a closed space.
- EMC Electromagnetic Compatibility
- Case 2 has a certain amount of oil in motor housing chamber SP1 and gear housing chamber SP2.
- the lower part of the motor housing chamber SP1 forms an oil sump space SP10 where oil is collected
- the lower part of the gear housing chamber SP2 forms an oil sump space SP20 where oil is collected.
- oil accumulated in the oil sump space SP10 and oil accumulated in the oil sump space SP20 are schematically shown by a hatched area 88.
- the partition wall 2500 of the case 2 may be formed to partition the motor housing chamber SP1 and the gear housing chamber SP2 in the axial direction above the oil reservoir space SP10 and the oil reservoir space SP20. Note that the partition wall portion 2500 does not need to completely partition the motor housing chamber SP1 and the gear housing chamber SP2, and even if the motor housing chamber SP1 and the gear housing chamber SP2 communicate with each other in the upper part or a part around the first axis A1. good.
- the oil accumulated in the oil sump space SP10 of the motor storage chamber SP1 may be sucked up by an oil pump (for example, an electric oil pump) through the strainer 90 and used for cooling and lubricating the rotating electric machine 1.
- an oil pump for example, an electric oil pump
- oil may be supplied to the coil end 12 or rotor axis of the rotating electric machine 1.
- the oil may be supplied to bearings BR1 and BR2 that rotatably support the rotor shaft 11 of the rotating electric machine 1.
- the oil accumulated in the oil sump space SP20 of the gear storage chamber SP2 is scraped up by the differential input gear 51 and used for lubricating the power transmission mechanism 7.
- the oil scraped up by the differential input gear 51 is transferred to bearings BR3 and BR4 that rotatably support the input shaft 31 via a catcher (not shown) that may be provided at the upper part of the gear storage chamber SP2. etc. may be supplied.
- the case 2 has a communication oil passage 20 that communicates with the motor housing chamber SP1 and the gear housing chamber SP2. That is, the motor housing chamber SP1 and the gear housing chamber SP2 are not oil-tight spaces that are independent of each other, but are spaces that communicate with each other via the communication oil passage 20. Therefore, the oil that accumulates in the oil sump space SP10 at a certain time may constitute the oil that accumulates in the oil sump space SP20 at another time.
- the communication oil passage 20 that communicates with the motor housing chamber SP1 and the gear housing chamber SP2
- the oil can be shared between the motor housing chamber SP1 and the gear housing chamber SP2. This makes it possible to improve the convenience of operations such as changing oil.
- the communication oil passage 20 passes below the partition wall 2500. That is, the communication oil passage 20 has a different form from the hole formed in the partition wall portion 2500 (the communication hole 20' shown in FIG. 4, etc., which will be described later). Therefore, the communication oil passage 20 can have openings 21 and 22 to the motor housing chamber SP1 and the gear housing chamber SP2 at positions farther away from the partition wall portion 2500 in the X direction.
- the opening 21 that opens into the motor storage chamber SP1 is provided at a position away from the partition wall 2500 toward the X2 side (an example of a first position), and opens into the gear storage chamber SP2.
- the opening 22 is provided at a position away from the partition wall 2500 toward the X1 side (an example of a second position).
- the opening 21 opens into the oil sump space SP10, and the opening 22 opens into the oil sump space SP20.
- the oil level is within the horizontal plane.
- a desired amount of oil can be secured in each of the oil sump space SP10 and the oil sump space SP20.
- the opening 21 is preferably arranged on the X2 side (axially outer side) than the strainer 90. Thereby, the possibility that the strainer 90 will be exposed to the air can be effectively reduced in the state of the first inclined posture, which will be described later with reference to FIG. 7 .
- the opening 21 may be an upward opening, or may be an axial opening. In the case of an axial opening, the opening 21 can be easily formed along with the formation of the communicating oil passage 20.
- the opening 22 is preferably arranged on the X1 side (axially outer side) than the differential input gear 51. As a result, there is a possibility that the lower part of the differential input gear 51 will be exposed to the air in the second inclined position, which will be described later with reference to FIG. possibility) can be effectively reduced.
- the opening 22 may be an axial opening, but is preferably an upward opening. The significance of such an upward opening will be described later.
- the communication oil passage 20 preferably extends linearly in the axial direction, as shown in FIG. In this case, forming the communicating oil passage 20 in the case 2 becomes easy. However, depending on the shape and various layouts of the case 2, the communication oil passage 20 may be formed in a manner different from that shown in the drawings. For example, the communicating oil passage 20 may have local height differences. It may have a section that is inclined with respect to the horizontal plane.
- the communication oil passage 20 is formed at a position that overlaps the rotating electrical machine 1 in the vertical direction when viewed in the axial direction (for example, it is arranged directly below the first axis A1). , may be arranged at a position that does not overlap with the rotating electric machine 1.
- the communication oil passage 20 may be formed between the rotating electric machine 1 and the differential input gear 51 in the Y direction (for example, at a position overlapping the counter shaft 41 when viewed in the vertical direction).
- the communication oil passage 20 is formed in each of the motor case 250 and the gear case 254. That is, the communicating oil passage 20 includes an oil passage part 2509 formed in the motor case 250 and an oil passage part 2549 formed in the gear case 254.
- the X1 side end of the oil passage portion 2509 and the X2 side end of the oil passage portion 2549 are continuous with each other at the mating surfaces of the motor case 250 and the gear case 254 in the axial direction.
- the X1 side end of the oil passage section 2509 and the X2 side end of the oil passage section 2549 may have a structure in which only their end surfaces abut against each other, and a sealing member around the communicating oil passage 20 is not necessary.
- FIGS. 4 to 6 are diagrams showing configurations according to comparative examples, and are sectional views taken along the cross section corresponding to FIG. 3, respectively.
- Figure 4 shows the state of the oil when the vehicle is in a horizontal position
- Figure 5 shows the state of the oil when the vehicle is in a horizontal position in a tilted position (hereinafter also referred to as "first tilted position") in which the vehicle is tilted to one side when viewed in the Y direction
- FIG. 6 shows the state of the oil at a certain time
- FIG. 6 shows the state of the oil when it is in a tilted posture (hereinafter also referred to as "second tilted posture”) tilted to the other side when viewed in the Y direction.
- FIGS. 7 and 8 are explanatory diagrams of the state of oil in this example, and are sectional views taken along the cross section corresponding to FIG. 3, respectively.
- FIG. 7 shows the state of the oil when the vehicle is in the first tilted position
- FIG. 8 shows the state of the oil when the vehicle is in the second tilted position.
- a hatched area 88 outlines the area where oil is accumulated.
- a communication hole 20' is provided at the lower part of the partition wall 2500'. Even in this comparative example, the oil in the motor housing chamber SP1 and the oil in the gear housing chamber SP2 can come and go through the communication hole 20'. Therefore, similarly to the present embodiment, in the horizontal position, desired amounts of oil can be secured in the motor housing chamber SP1 and the gear housing chamber SP2, respectively.
- the amount of oil is significantly greater than the amount of oil in chamber SP1.
- the oil in the motor storage chamber SP1 side becomes insufficient, and the ability of the oil to cool the rotating electric machine 1 decreases.
- the strainer 90 since the strainer 90 is exposed to the air, there is a possibility that the oil pump (not shown) may suck in air (that is, there is a possibility of air suction).
- the amount of oil in the gear storage chamber SP2 side becomes too large, a relatively large area of the differential input gear 51 may be submerged in oil, which may increase the load (resistance) to the rotation of the differential input gear 51. be.
- the amount of oil in the motor storage chamber SP1 which is vertically lower than the gear storage chamber SP2 is The amount of oil is significantly higher than that of oil.
- the differential input gear 51 will be unable or insufficient to scrape up the oil due to a lack of oil on the side of the gear storage chamber SP2, and the lubricating ability of the power transmission mechanism 7 using oil may be reduced.
- the oil scraped up by the rotation of the differential input gear 51 will be insufficient, resulting in insufficient lubrication of the bearings BR3, BR4, etc.
- the rotor 10 of the rotating electric machine 1 may be submerged in oil, and the load (resistance) to the rotation of the rotor 10 of the rotating electric machine 1 may become large.
- the oil accumulated in the motor housing chamber SP1 is transferred by its own weight to the gear housing chamber SP2, which is vertically lower than the motor housing chamber SP1. It tends to move in the same way as in the case of , but when the oil level reaches the height of the opening 21, the movement stops.
- the opening 21 is located away from the partition wall 2500 on the X2 side, so even if the oil level reaches the height of the opening 21, the motor cannot be accommodated, as schematically shown in FIG. A relatively large amount of oil can be secured in the chamber SP1. In this case, it is still possible for the oil pump to draw up oil via the strainer 90.
- the above-mentioned disadvantages that occur in the comparative example (the possibility that the cooling capacity of the rotating electrical machine 1 will be reduced due to a lack of oil on the motor housing chamber SP1 side, air suction, etc.) can be eliminated or reduced.
- the oil accumulated in the gear housing chamber SP2 is transferred by its own weight to the motor housing chamber SP1, which is vertically lower than the gear housing chamber SP2, as in the case of the comparative example. It tends to move in the same way, but when the oil level reaches the height of the opening 22, the movement stops.
- the opening 22 is located away from the partition wall 2500 on the X1 side, so even if the oil level reaches the height of the opening 22, the motor cannot be accommodated, as schematically shown in FIG. A relatively large amount of oil can be secured in the chamber SP1. In this case, the differential input gear 51 can still scrape up the oil.
- the above-mentioned disadvantages that occur in the comparative example (such as the possibility that the lubricating ability of the power transmission mechanism 7 by oil is reduced due to insufficient oil on the gear storage chamber SP2 side) can be eliminated or reduced.
- the present embodiment even in the second inclined position, an excessive rise in the oil level in the motor housing chamber SP1 is prevented, so that oil cannot be applied to places such as a breather (not shown) etc. It is also possible to arrange components that are preferably arranged in the upper part of the motor housing chamber SP1.
- the breather is an adjustment hole that adjusts the flow of air into and out of the case 2 in response to expansion and contraction of air due to temperature changes within the sealed case 2, and prevents water, oil, etc. from entering.
- the position is on the X2 side, and it is more advantageous that the height of the opening 21 is higher.
- increasing the height of the opening 21 is disadvantageous in that it tends to leave oil residue when oil is removed from the lowest part.
- the opening 21 can be placed at a position sufficiently away from the partition wall 2500 on the X2 side.
- the opening 21 can be arranged near the mating surfaces of the motor case 250 and the motor cover 252. Thereby, sufficient oil can be secured on the strainer 90 in the above-described first inclined position without increasing the height of the opening 21.
- the opening 21 may be formed at the lowest position of the motor housing chamber SP1.
- the opening 22 is , it is difficult to arrange it at a position sufficiently away from the partition wall portion 2500 on the X1 side.
- this embodiment by forming the opening 22 at a relatively high position, sufficient oil can be secured on the lower end side of the differential input gear 51 in the second inclined position described above.
- the communication oil passage 20 includes an axial oil passage portion 200 that extends in the axial direction, and an end portion of the axial oil passage portion 200 on the X1 side that extends upward. and an upward oil passage section 202. That is, in the communicating oil passage 20, the axial oil passage part 200 and the upward oil passage part 202 form an L-shape in a cross-sectional view shown in FIG. 3 and the like.
- the axial oil passage section 200 includes the above-described oil passage section 2509 and a part of the oil passage section 2549, and the upward oil passage section 202 is formed by another part of the oil passage section 2549.
- the end of the oil passage section 2549 on the X1 side forms an upward oil passage section 202 that extends upward.
- the upward oil passage portion 202 forms an opening 22 that is an upward opening at the upper end.
- the gear case 254 is closed on the X1 side and opened on the X2 side.
- the upward oil passage portion 202 is preferably inclined in such a manner that the upper side is closer to the X2 side than the lower side when viewed vertically to the axial direction and horizontally (for example, when viewed in the direction shown in FIG. 3). Since the upward oil passage section 202 has such an inclination, the upward oil passage section 202 can be easily formed by accessing from the X2 side of the gear case 254.
- the upward oil passage portion 202 can be easily formed by machining, as schematically indicated by arrow R9.
- FIG. 9 is a cross-sectional view of a portion corresponding to section Q9 in FIG. 3.
- the communicating oil passage 20 is formed in the case 2, but a part or all of the communicating oil passage 20 may be formed of a member different from the case 2, such as a pipe. .
- the opening 21 is arranged on the X2 side of the strainer 90, that is, on the X2 side of the X2 side end surface of the strainer 90.
- the opening 21 may be arranged on the X2 side of the strainer 90 rather than the X1 side end surface and on the X1 side of the X2 side end surface. In this case, it is still possible for the oil pump to suck up oil through the strainer 90 even in the first inclined position described above with reference to FIG. In this case, the opening 21 may be arranged at a position offset from the strainer 90 in the Y direction.
- the opening 22 is arranged on the X1 side of the differential input gear 51, that is, on the X1 side of the X1 side end surface of the differential input gear 51.
- the differential input gear 51 can scrape up sufficient oil even in the second inclined position.
- the opening 22 may be arranged on the X1 side of the differential input gear 51 relative to the X2 side end surface and on the X2 side of the X1 side end surface. In this case, it is still possible for the differential input gear 51 to scrape up oil even in the second inclined position described above with reference to FIG.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- General Details Of Gearings (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
Description
前記回転電機からの駆動力を車輪に伝達する伝達機構と、
軸方向第1側に前記回転電機を収容する第1収容室と、軸方向第2側に前記伝達機構を収容する第2収容室とを形成するケースと、
前記第1収容室と前記第2収容室とに連通し、油が通る連通油路とを備え、
前記第1収容室の下部は、油が溜まる第1油溜め空間部を形成し、
前記第2収容室の下部は、前記伝達機構を形成するギヤの回転によって掻き上げられる油が溜まる第2油溜め空間部を形成し、
前記ケースは、軸方向で前記第1収容室と前記第2収容室を少なくとも部分的に仕切りつつ、前記第1油溜め空間部及び前記第2油溜め空間部より上方まで延在する隔壁部を有し、
前記連通油路は、前記隔壁部よりも下方を通り、かつ、前記隔壁部から前記軸方向第1側に離れた第1位置にて前記第1収容室に開口する第1開口部を有するとともに、前記隔壁部から前記軸方向第2側に離れた第2位置にて前記第2収容室に開口する第2開口部を有する、車両用駆動装置が提供される。
図1は、回転電機1及び動力伝達機構7を含む車両用駆動システム100のスケルトン図である。図1には、X方向と、X方向に沿ったX1側(第2側の一例)とX2側(第1側の一例)が定義されている。X方向は、第1軸A1の方向(以下、「軸方向」とも称する)に平行である。
図2は、車両用駆動装置17の要部を第1軸A1に沿ってX1側から視た概略図である。図3は、車両用駆動装置17の要部を切断した断面図であり、図2のラインA-Aに沿った断面図である。なお、図2は、簡易な説明図であり、ケース2の一部等の図示が省略されている。また、図2には、Y方向と、Y方向に沿ったY1側とY2側が定義されている。また、図2及び図3には、Z方向と、Z方向に沿ったZ1側とZ2側が定義されている。この場合、Z方向は、鉛直方向に平行であるとし、Z1側が上側に対応するものとする。なお、図2に示す例では、第1軸A1及び第3軸A3は略同じ高さに位置し、第2軸A2は、第1軸A1及び第3軸A3よりも上方に位置するが、他の位置関係であってもよい。例えば、第1軸A1は、第3軸A3よりもわずかに下方に位置し、第1軸A1及び第2軸A2は略同じ高さに位置してもよい。
Claims (6)
- 軸方向に延在する回転軸を有する回転電機と、
前記回転電機からの駆動力を車輪に伝達する伝達機構と、
軸方向第1側に前記回転電機を収容する第1収容室と、軸方向第2側に前記伝達機構を収容する第2収容室とを形成するケースと、
前記第1収容室と前記第2収容室とに連通し、油が通る連通油路とを備え、
前記第1収容室の下部は、油が溜まる第1油溜め空間部を形成し、
前記第2収容室の下部は、前記伝達機構を形成するギヤの回転によって掻き上げられる油が溜まる第2油溜め空間部を形成し、
前記ケースは、軸方向で前記第1収容室と前記第2収容室を少なくとも部分的に仕切りつつ、前記第1油溜め空間部及び前記第2油溜め空間部より上方まで延在する隔壁部を有し、
前記連通油路は、前記隔壁部よりも下方を通り、かつ、前記隔壁部から前記軸方向第1側に離れた第1位置にて前記第1収容室に開口する第1開口部を有するとともに、前記隔壁部から前記軸方向第2側に離れた第2位置にて前記第2収容室に開口する第2開口部を有する、車両用駆動装置。 - 前記伝達機構は、差動歯車機構を含み、
前記第2位置は、軸方向に垂直に視て、前記差動歯車機構の差動入力ギヤの前記軸方向第1側の端面よりも前記軸方向第2側に位置する、請求項1に記載の車両用駆動装置。 - 前記第2位置は、軸方向に垂直に視て、前記差動歯車機構の差動入力ギヤの前記軸方向第2側の端面よりも前記軸方向第2側に位置する、請求項2に記載の車両用駆動装置。
- 前記第1油溜め空間部に溜まる油を、ストレーナを介して吸い上げるオイルポンプを更に備え、
前記第1位置は、軸方向に垂直に視て、前記ストレーナの前記軸方向第2側の端面よりも前記軸方向第1側に位置する、請求項1に記載の車両用駆動装置。 - 前記連通油路は、
軸方向に延在する軸方向油路部と、
前記軸方向油路部から連続し、前記軸方向油路部の前記軸方向第2側の端部で上方向に延在する上向き油路部とを含む、請求項1から4のうちのいずれか1項に記載の車両用駆動装置。 - 前記上向き油路部は、軸方向に垂直かつ水平方向に視て、下側より上側が前記軸方向第1側になる態様で傾斜する、請求項5に記載の車両用駆動装置。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US18/700,564 US12504066B2 (en) | 2022-03-29 | 2023-03-28 | Vehicular drive device capable of securing an appropriate amount of oil in a first housing chamber and a second housing chamber |
| CN202380014805.9A CN118339393A (zh) | 2022-03-29 | 2023-03-28 | 车辆用驱动装置 |
| EP23780430.7A EP4407215B1 (en) | 2022-03-29 | 2023-03-28 | Vehicular drive device |
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| JP2022053839A JP7524923B2 (ja) | 2022-03-29 | 2022-03-29 | 車両用駆動装置 |
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| DE102015214334A1 (de) * | 2015-07-29 | 2017-02-02 | Volkswagen Aktiengesellschaft | Antriebsanordnung für ein Kraftfahrzeug |
| WO2021137284A1 (ja) * | 2019-12-30 | 2021-07-08 | ジヤトコ株式会社 | 動力伝達装置 |
| JP2021112052A (ja) | 2020-01-10 | 2021-08-02 | 日本電産株式会社 | モータユニット |
| JP2021148140A (ja) * | 2020-03-16 | 2021-09-27 | 本田技研工業株式会社 | 駆動装置およびこれを備えた車両 |
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| JP4485566B2 (ja) * | 2007-11-13 | 2010-06-23 | 本田技研工業株式会社 | モータ式動力装置 |
| JP5328231B2 (ja) | 2008-06-12 | 2013-10-30 | 本田技研工業株式会社 | 車両用駆動モータユニット |
| JP5290217B2 (ja) * | 2010-02-25 | 2013-09-18 | トヨタ自動車株式会社 | 車両用動力伝達装置 |
| JP2012082930A (ja) * | 2010-10-14 | 2012-04-26 | Toyota Motor Corp | 電気自動車用駆動装置 |
| JP2013119918A (ja) | 2011-12-08 | 2013-06-17 | Aisin Seiki Co Ltd | 動力伝達装置 |
| JP7249838B2 (ja) * | 2019-03-25 | 2023-03-31 | 株式会社Subaru | ギヤユニット |
| JP2024075380A (ja) * | 2022-11-22 | 2024-06-03 | トヨタ自動車株式会社 | 駆動装置 |
| JPWO2024203568A1 (ja) * | 2023-03-31 | 2024-10-03 |
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- 2023-03-28 CN CN202380014805.9A patent/CN118339393A/zh active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015214334A1 (de) * | 2015-07-29 | 2017-02-02 | Volkswagen Aktiengesellschaft | Antriebsanordnung für ein Kraftfahrzeug |
| WO2021137284A1 (ja) * | 2019-12-30 | 2021-07-08 | ジヤトコ株式会社 | 動力伝達装置 |
| JP2021112052A (ja) | 2020-01-10 | 2021-08-02 | 日本電産株式会社 | モータユニット |
| JP2021148140A (ja) * | 2020-03-16 | 2021-09-27 | 本田技研工業株式会社 | 駆動装置およびこれを備えた車両 |
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| JP7524923B2 (ja) | 2024-07-30 |
| EP4407215A1 (en) | 2024-07-31 |
| JP2023146588A (ja) | 2023-10-12 |
| US20240401691A1 (en) | 2024-12-05 |
| CN118339393A (zh) | 2024-07-12 |
| EP4407215A4 (en) | 2025-02-19 |
| EP4407215B1 (en) | 2026-01-14 |
| US12504066B2 (en) | 2025-12-23 |
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