WO2014208160A1 - 動力伝達装置 - Google Patents
動力伝達装置 Download PDFInfo
- Publication number
- WO2014208160A1 WO2014208160A1 PCT/JP2014/058928 JP2014058928W WO2014208160A1 WO 2014208160 A1 WO2014208160 A1 WO 2014208160A1 JP 2014058928 W JP2014058928 W JP 2014058928W WO 2014208160 A1 WO2014208160 A1 WO 2014208160A1
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- WIPO (PCT)
- Prior art keywords
- differential
- hydraulic oil
- gear
- outer peripheral
- flange portion
- Prior art date
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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
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
- F16H3/62—Gearings having three or more central gears
- F16H3/66—Gearings having three or more central gears composed of a number of gear trains without drive passing from one train to another
- F16H3/663—Gearings having three or more central gears composed of a number of gear trains without drive passing from one train to another with conveying rotary motion between axially spaced orbital gears, e.g. RAVIGNEAUX
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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
- F16H57/037—Gearboxes for accommodating differential gearings
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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
- F16H48/00—Differential gearings
- F16H48/06—Differential gearings with gears having orbital motion
- F16H48/08—Differential gearings with gears having orbital motion comprising bevel gears
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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
- F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness
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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
- F16H57/04—Features relating to lubrication or cooling or heating
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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
- F16H57/04—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
- F16H57/0423—Lubricant guiding means mounted or supported on the casing, e.g. shields or baffles for collecting lubricant, tubes or pipes
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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
- F16H57/04—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
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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
- F16H57/04—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
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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
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
- F16H2200/006—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising eight forward speeds
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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
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/0082—Transmissions for multiple ratios characterised by the number of reverse speeds
- F16H2200/0086—Transmissions for multiple ratios characterised by the number of reverse speeds the gear ratios comprising two reverse speeds
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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
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/2002—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears
- F16H2200/2007—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with two sets of orbital gears
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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
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/202—Transmissions using gears with orbital motion characterised by the type of Ravigneaux set
- F16H2200/2023—Transmissions using gears with orbital motion characterised by the type of Ravigneaux set using a Ravigneaux set with 4 connections
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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
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/203—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes
- F16H2200/2046—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes with six engaging means
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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
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/2079—Transmissions using gears with orbital motion using freewheel type mechanisms, e.g. freewheel clutches
- F16H2200/2082—Transmissions using gears with orbital motion using freewheel type mechanisms, e.g. freewheel clutches one freewheel mechanisms
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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
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0402—Cleaning of lubricants, e.g. filters or magnets
Definitions
- the present invention provides a power transmission including a diff ring gear disposed below an input side drive pinion gear and meshing with the drive pinion gear, a differential gear coupled to the diff ring gear, and a case housing the diff ring gear and the differential gear. Relates to the device.
- this type of power transmission device has a counter shaft arranged in parallel with the input shaft of the speed change mechanism, and a ring gear (diff ring gear) arranged below the counter shaft and meshing with the output gear of the counter shaft.
- a differential device differential gear
- a case member that houses the speed change mechanism and the differential device, a differential chamber in which the differential device is disposed, and oil (hydraulic fluid) are stored in the case member.
- oil hydroaulic fluid
- the differential partitioning member of the power transmission device includes a part of the case member, a rib member extending from the case member along the outer peripheral surface of the ring gear, and a rib that covers the differential device from the opposite side of the case member. And a hemispherical reservoir plate arranged so as to be in close contact with the inner peripheral surface of the member.
- the main object of the present invention is to better suppress the flow of hydraulic oil into the differential chamber in which the differential ring gear and the differential gear are arranged, and to further reduce the stirring resistance of the hydraulic oil acting on the differential ring gear. .
- the power transmission device employs the following means in order to achieve the main object.
- the power transmission device includes: A differential ring gear disposed below the drive pinion gear on the input side and meshing with the drive pinion gear, a differential gear coupled to the differential ring gear, a case housing the differential ring gear and the differential gear, and inside the case
- a power transmission device comprising: a differential member that divides a differential chamber in which the differential ring gear and the differential gear are arranged and a hydraulic oil storage chamber that stores hydraulic oil;
- the partition member has a cylindrical portion that covers a part of the differential gear, and a flange portion that extends in a radial direction from the cylindrical portion, The cylindrical portion and the flange portion are integrally formed,
- a seal portion that extends along the inner peripheral surface of the case and prevents the hydraulic oil from flowing from the hydraulic oil storage chamber to the differential chamber is provided at the outer peripheral edge of the flange portion. It is a characteristic.
- a partition member that divides the inside of the case into a differential chamber and a hydraulic oil storage chamber includes a cylindrical portion that covers a part of the differential gear, and a flange that extends radially from the cylindrical portion. Part.
- the cylindrical portion and the flange portion are integrally formed.
- the hydraulic oil flows into the outer peripheral edge of the flange portion along the inner peripheral surface of the case and flows from the hydraulic oil storage chamber to the differential chamber.
- a seal portion is provided to suppress this. As a result, no gap is formed between the tubular portion and the flange portion, so that hydraulic oil does not flow into the differential chamber from between the tubular portion and the flange portion, and the outer periphery of the case and the flange portion.
- the seal portion may be formed by elastically pressing the outer peripheral edge portion of the flange portion against the case. Thereby, it can suppress more easily and favorably that hydraulic oil flows in from a hydraulic oil storage chamber to a differential chamber, without attaching a sealing member separately to the outer periphery part of a flange part.
- the flange portion may have at least one curved portion extending along the outer peripheral edge portion between the outer peripheral edge portion and the cylindrical portion, and the flange portion is formed by elastic deformation of the curved portion.
- the outer peripheral edge may be elastically pressed against the case.
- seal part may be a seal member provided between the case and the outer peripheral edge part of the flange part.
- the partition member may have a diff ring surrounding portion extended from an outer peripheral edge portion of the flange portion so as to cover a part of the diff ring gear from above without interfering with the drive pinion gear,
- the diff ring surrounding portion may be formed integrally with the tubular portion and the flange portion, and the seal portion may be provided at least in a range below the def ring surrounding portion.
- no gap is formed between the diffring enclosure and the flange, so that hydraulic fluid does not flow into the diff chamber from between the diffring enclosure and the flange, and is lower than the diffring enclosure.
- the flow of hydraulic oil from the hydraulic oil storage chamber to the differential chamber is regulated by the seal portion. Accordingly, it is possible to further suppress the inflow of hydraulic oil into the differential chamber.
- the diffring surrounding portion may have at least one opening.
- the hydraulic oil that has flowed into the differential chamber can be swept up by the differential ring gear and discharged out of the differential chamber from the opening of the differential ring surrounding portion.
- the seal portion is provided in a range below the diff ring surrounding portion of the outer peripheral edge portion of the flange portion, the hydraulic oil discharged from the opening portion to the hydraulic oil storage chamber side is outer peripheral edge portion of the flange portion. It is possible to prevent the oil from flowing again into the differential chamber from between the case and the case by the seal part, and it is possible to very well suppress the hydraulic oil from staying in the differential chamber only by the scraping action by the differential ring gear. Can do.
- the diff ring surrounding portion may have a protruding portion that protrudes from an outer peripheral surface of the diff ring surrounding portion along an edge portion extending in the axial direction of the diff ring gear below the opening portion.
- the projecting portion favorably prevents the hydraulic oil that has been scraped up by the diff ring gear and discharged from the opening of the diff ring surrounding portion to the outside of the def chamber from flowing into the def chamber again from the vicinity of the edge of the def ring surrounding portion. It becomes possible to suppress.
- the protrusion may be extended to the outer peripheral edge of the flange so as to be inclined downward as approaching the hydraulic oil reservoir.
- a seal portion may be provided to suppress the above.
- the seal portion it is possible for the seal portion to satisfactorily prevent the hydraulic oil that has been scraped up by the diff ring gear and discharged from the opening of the diff ring surrounding portion to the outside of the def chamber from flowing from the vicinity of the edge of the def ring surrounding portion into the def chamber. It becomes possible to suppress.
- FIG. 2 is an operation table showing the relationship between each shift stage of an automatic transmission 25 included in the power transmission device 20 of FIG. 1 and the operating states of clutches and brakes.
- 4 is an explanatory view showing the inside of a transaxle case 222.
- FIG. 4 is an explanatory view showing the inside of a converter housing 221.
- FIG. FIG. 4 is a partial sectional view taken along line AB in FIG. 3.
- FIG. 4 is a partial cross-sectional view taken along line AC in FIG. 3.
- FIG. 4 is a partial cross-sectional view taken along the line DA in FIG. 3.
- FIG. 5 is a partial cross-sectional view taken along line EF in FIG. 4.
- FIG. 4 is a perspective view showing a reservoir plate 70.
- FIG. 3 is a front view showing a reservoir plate 70.
- FIG. 4 is a side view showing a reservoir plate 70.
- FIG. It is an enlarged view which shows the part enclosed with the broken line in FIG. It is a side view which shows the reservoir plate 70B which concerns on other embodiment.
- FIG. 15 is an enlarged sectional view taken along line AA shown in FIG.
- FIG. 1 is a schematic configuration diagram of a power transmission device 20 according to the present invention.
- a power transmission device 20 shown in the figure is connected to a crankshaft of an engine (not shown) mounted on a front wheel drive type vehicle and can transmit power from the engine to left and right drive wheels (front wheels) DW. .
- the power transmission device 20 is accommodated in a converter housing 221 (first case), a transmission case 22 including a transaxle case 222 (second case) coupled to the converter housing 221, and the converter housing 221.
- the fluid transmission device 23 includes an input-side pump impeller 23p connected to an engine crankshaft, and an output-side turbine runner 23t, a pump impeller 23p, and a turbine runner 23t connected to an input shaft 26 of an automatic transmission 25. And a torque converter having a stator 23s that rectifies the flow of hydraulic oil from the turbine runner 23t to the pump impeller 23p, a one-way clutch 23o that restricts the rotational direction of the stator 23s in one direction, a lock-up clutch 23c, and the like.
- the fluid transmission device 23 may be configured as a fluid coupling that does not have the stator 23s.
- the oil pump 24 is configured as a gear pump including a pump assembly including a pump body and a pump cover, and an external gear connected to the pump impeller 23p of the fluid transmission device 23 via a hub.
- the oil pump 24 is driven by power from the engine, sucks hydraulic oil (ATF) stored in an oil pan (not shown), and pumps it to a hydraulic control device (not shown).
- ATF hydraulic oil
- the automatic transmission 25 is configured as an eight-speed transmission, and as shown in FIG. 1, a double pinion type first planetary gear mechanism 30, a Ravigneaux type second planetary gear mechanism 35, and an input 4 clutches C1, C2, C3 and C4, two brakes B1 and B2, and a one-way clutch F1 for changing the power transmission path from the side to the output side.
- the first planetary gear mechanism 30 includes a sun gear 31 that is an external gear, a ring gear 32 that is an internal gear disposed concentrically with the sun gear 31, and meshes with each other, one being the sun gear 31 and the other being the ring gear 32. And a planetary carrier 34 that holds a plurality of pairs of pinion gears 33a and 33b that mesh with each other so as to rotate and revolve.
- the sun gear 31 of the first planetary gear mechanism 30 is fixed to the transmission case 22, and the planetary carrier 34 of the first planetary gear mechanism 30 is connected to the input shaft 26 so as to be integrally rotatable.
- the first planetary gear mechanism 30 is configured as a so-called reduction gear, and decelerates the power transmitted to the planetary carrier 34 as an input element and outputs it from the ring gear 32 as an output element.
- the second planetary gear mechanism 35 includes a first sun gear 36a and a second sun gear 36b which are external gears, a ring gear 37 which is an internal gear disposed concentrically with the first and second sun gears 36a and 36b, A plurality of short pinion gears 38a meshing with one sun gear 36a, a plurality of long pinion gears 38b meshing with the second sun gear 36b and the plurality of short pinion gears 38a and meshing with the ring gear 37, a plurality of short pinion gears 38a and a plurality of long pinion gears 38b And a planetary carrier 39 that holds the motor in a rotatable (rotatable) and revolving manner.
- the ring gear 37 of the second planetary gear mechanism 35 functions as an output member of the automatic transmission 25, and the power transmitted from the input shaft 26 to the ring gear 37 is transmitted to the left and right via the gear mechanism 40, the differential gear 50 and the drive shaft 28. Is transmitted to the driving wheel.
- the planetary carrier 39 is supported by the transmission case 22 via the one-way clutch F1, and the rotation direction of the planetary carrier 39 is limited to one direction by the one-way clutch F1.
- the clutch C1 has a hydraulic servo composed of a piston, a plurality of friction plates and mating plates, an oil chamber to which hydraulic oil is supplied, and the like, and the ring gear 32 of the first planetary gear mechanism 30 and the second planetary gear mechanism 35
- This is a multi-plate friction type hydraulic clutch (friction engagement element) capable of fastening the first sun gear 36a and releasing the fastening of both.
- the clutch C2 has a hydraulic servo composed of a piston, a plurality of friction plates and mating plates, an oil chamber supplied with hydraulic oil, and the like, and fastens the input shaft 26 and the planetary carrier 39 of the second planetary gear mechanism 35.
- the clutch C3 has a hydraulic servo composed of a piston, a plurality of friction plates and mating plates, an oil chamber to which hydraulic oil is supplied, and the like.
- the ring gear 32 of the first planetary gear mechanism 30 and the second planetary gear mechanism 35 This is a multi-plate friction hydraulic clutch capable of fastening the second sun gear 36b and releasing the fastening of both.
- the clutch C4 has a hydraulic servo composed of a piston, a plurality of friction plates, a counter plate, an oil chamber to which hydraulic oil is supplied, and the like, and the planetary carrier 34 and the second planetary gear mechanism 35 of the first planetary gear mechanism 30. This is a multi-plate friction type hydraulic clutch capable of fastening the second sun gear 36b and releasing the fastening of both.
- the brake B1 is configured as a band brake including a hydraulic servo or a multi-plate friction brake, and fixes the second sun gear 36b of the second planetary gear mechanism 35 to the transmission case 22 in a non-rotatable manner and the transmission of the second sun gear 36b.
- This is a hydraulic brake (friction engagement element) that can be released from being fixed to the case 22.
- the brake B2 is configured as a band brake including a hydraulic servo or a multi-plate friction brake, and fixes the planetary carrier 39 of the second planetary gear mechanism 35 to the transmission case 22 in a non-rotatable manner and the transmission case 22 of the planetary carrier 39. This is a hydraulic brake that can be released from the fixed state.
- the one-way clutch F1 includes, for example, an inner race, an outer race, and a plurality of sprags.
- the one-way clutch F1 transmits torque via the sprag and
- the one-way clutch F1 may have a configuration other than a sprag type such as a roller type.
- FIG. 2 shows an operation table showing the relationship between the respective speeds of the automatic transmission 25 and the operating states of the clutches C1 to C4, the brakes B1 and B2, and the one-way clutch F1.
- the automatic transmission 25 provides forward 1st to 8th gears and reverse 1st and 2nd gears by setting the clutches C1 to C4 and the brakes B1 and B2 to the states shown in the operation table of FIG. .
- at least one of the clutches C1 to C4 and the brakes B1 and B2 may be a meshing engagement element such as a dog clutch.
- the gear mechanism 40 is fixed to a counter drive gear 41 connected to the ring gear 37 of the second planetary gear mechanism 35 of the automatic transmission 25 and a counter shaft 42 extending in parallel with the input shaft 26 of the automatic transmission 25.
- a counter driven gear 43 that meshes with the counter drive gear 41, a drive pinion gear (final drive gear) 44 formed (or fixed) on the counter shaft 42, and disposed below the drive pinion gear 44 (see FIG. 3).
- a differential ring gear (final driven gear) 45 that meshes with the drive pinion gear 44.
- the diff ring gear 45 is configured as a helical gear.
- the differential gear 50 is a pair (two) of pinion gears 51 and a pair (two) of gears fixed to the drive shaft 28 and meshed at right angles with the pair of pinion gears 51.
- each pinion gear 51 and each side gear 52 are configured as bevel gears.
- a pinion washer 55 is disposed between each pinion gear 51 and the differential case 54, and a side washer 56 is disposed between each side gear 52 and the differential case 54.
- the differential case 54 is rotatably supported by the transmission case 22 coaxially with the drive shaft 28 via bearings 81 and 82.
- FIG. 3 is an explanatory view showing the inside of the transaxle case 222
- FIG. 4 is an explanatory view showing the inside of the converter housing 221.
- 5 is a sectional view taken along the line AB in FIG. 3
- FIG. 6 is a sectional view taken along the line AC in FIG. 3
- FIG. 7 is a sectional view taken along the line DA in FIG.
- FIG. 8 is a cross-sectional view taken along the line EF in FIG.
- a diff ring gear 45 and a differential gear 50 are arranged inside a transmission case 22 including a converter housing 221 and a transaxle case 222 by a reservoir plate 70 shown in FIGS. 9, 10, and 11.
- “upper” and “lower” respectively indicate “upper” or “lower” in the vertical direction when the power transmission device 20 is mounted on the vehicle.
- the reservoir plate 70 extends from a cylindrical portion 71, a flange portion 72 extending radially outward from the cylindrical portion 71, and an outer peripheral edge 72 a of the flange portion 72.
- the diff ring surrounding portion 73 is fixed to the transmission case 22.
- the reservoir plate 70 composed of the cylindrical portion 71, the flange portion 72, and the diffring surrounding portion 73 is integrally formed of resin.
- the reservoir plate 70 may be formed of a material other than resin.
- the cylindrical portion 71 is formed so as to extend along a part of the outer peripheral surface of the differential case 54 of the differential gear 50, and mainly one side gear support portion of the differential case 54. (A portion supported by the converter housing 221 via a bearing) The portion excluding 54a and the diff ring gear mounting portion 54b is surrounded. A slight clearance is defined between the end of the cylindrical portion 71 on the converter housing 221 side and the converter housing 221 with the reservoir plate 70 fixed to the transmission case 22. Further, as shown in FIGS. 7 and 9 to 11, the cylindrical portion 71 is formed with an opening 71 o that opens above the pinion shaft 53 of the differential gear 50.
- the flange portion 72 extends outward in the radial direction from the end portion of the cylindrical portion 71 on the transaxle case 222 side. Further, notches 70s are formed on the flange portion 72 and the cylindrical portion 71 so as not to interfere with a bearing (not shown) that rotatably supports the countershaft 42. A circular arc (substantially C-shaped) extends around the cylindrical portion 71. Further, in the present embodiment, the transaxle case 222 has an inner peripheral surface 222n extending in an arc shape along the outer periphery of the diff ring gear 45 (see the broken line in FIG. 3), and an inner radius of the same curvature as the inner peripheral surface 222n.
- An arc-shaped rib portion 222r that is formed to have a peripheral surface and surrounds a part of the diffring gear 45 is provided.
- the reservoir plate 70 is fixed to the transmission case 22 so that the outer peripheral edge portion 72a of the flange portion 72 extends along the inner peripheral surface 222n and the inner peripheral surface of the rib portion 222r. With the reservoir plate 70 fixed to the transmission case 22, there is a slight clearance between the outer peripheral edge portion 72a of the flange portion 72 and the inner peripheral surface 222n of the transaxle case 222 and the inner peripheral surface of the rib portion 222r. Defined.
- the diff ring surrounding portion 73 extends in the axial direction from the outer peripheral edge portion 72a of the flange portion 72 to the opposite side to the tubular portion 71 so as to cover approximately one quarter of the outer peripheral surface of the diff ring gear 45 from above. .
- the diffring enclosure 73 is downstream of the rotation direction of the diffring gear 45 when viewed from the lowest point of the reservoir plate 70 when the vehicle on which the power transmission device 20 is mounted (the broken line arrow in FIGS. 3 and 9). Formed on the side. Further, as shown in FIG.
- the diff ring surrounding portion 73 includes a drive pinion gear 44 and a diff ring gear 45 so as to cover a part of the cutout portion 70 s without interfering with the drive pinion gear 44 (see a two-dot chain line in FIG. 3). It extends to the vicinity of the meshing part.
- the reservoir plate 70 is fixed to the transmission case 22 so that the outer peripheral edge portion 73a of the diff ring surrounding portion 73 is along the inner peripheral surface 222n extending in the arc shape of the transaxle case 222.
- the outer peripheral edge portion 72 a of the flange portion 72 and the inner peripheral surface 222 n are also between the outer peripheral edge portion 73 a and the inner peripheral surface 222 n of the diffring enclosure 73. (Slight) clearance is defined as between.
- two openings 731o and 732o are formed in the diff ring surrounding portion 73 and the flange portion 72 so as to be aligned in the circumferential direction.
- the openings 731o and 732o are formed so as to reach from a substantially central portion in the axial direction of the diffring surrounding portion 73 to a substantially central portion in the radial direction of the flange portion 72.
- outer peripheral side protruding portions 731a and 732a that protrude radially outward along the upper edge portion of the openings 731o and 732o are formed.
- the inner peripheral surface of the diffring enclosure 73 and the inner surface of the flange portion 72 are formed with inner peripheral protrusions 731b and 732b that protrude radially inward along the upper edge of the openings 731o and 732o. Yes.
- a protruding portion 73t is formed that protrudes radially outward along a lower edge portion 73d extending in the axial direction below the openings 731o and 732o.
- the protrusion 73 t has a flange portion so as to incline downward (downward in FIG. 11) as it approaches the hydraulic oil storage chamber 65 (the cylindrical portion 71 side, that is, the right side in FIG. 11). 72 to the outer peripheral edge 72a.
- concave portions are formed at corresponding positions so as to avoid interference with the outer peripheral side protruding portions 731a and 732a and the protruding portion 73t.
- the reservoir plate 70 has a first fixing portion 74, a second fixing portion 75, and a third fixing portion 76 that are fixed to the transmission case 22.
- the first fixing portion 74 includes a base portion 741 that extends radially outward from the outer peripheral edge portion 72 a of the flange portion 72, and an elastic member 742 that is fixed to the base portion 741.
- the base 741 is formed with a convex portion 741t that protrudes toward the converter housing 221 (the right side in FIG. 5), and the elastic member 742 is fixed to the convex portion 741t by press-fitting.
- the reservoir plate 70 has a base portion 741 of the first fixing portion 74 in contact with a step portion 2221 formed in the transaxle case 222 and a step in which the elastic member 742 of the first fixing portion 74 is formed in the converter housing 221. It is arranged in the transmission case 22 so as to abut on the portion 2211.
- fixed part 75 has the same structure as the 1st fixing
- the third fixing portion 76 includes a cylindrical portion 761 projecting radially outward from the outer peripheral surface of the diffring surrounding portion 73 and extending in the axial direction, and the cylindrical portion 71 side of the cylindrical portion 761. Includes a fitting portion 762 having a smaller diameter than the cylindrical portion 761 extending from the opposite end portion.
- the cylindrical portion 761 and the fitting portion 762 of the third fixing portion 76 are formed hollow, and the cylindrical portion 761 includes the first hollow portion 761 a located on the converter housing 221 side and the first hollow portion 761 a.
- a second hollow portion 761b having a smaller diameter than the first hollow portion 761a extending from the hollow portion 761a to the fitting portion 762 side.
- An elastic member 85 having a through hole 85o formed to communicate with the second hollow portion 761b is fitted into the first hollow portion 761a.
- the fitting portion 762 includes a hollow portion 762o formed so as to communicate with the second hollow portion 761b.
- the reservoir plate 70 is configured such that the elastic member 85 fitted to the cylindrical portion 761 contacts the converter housing 221 and the fitting portion 762 is fitted to the hole 222 o formed in the transaxle case 222. In the transmission case 22.
- the reservoir plate 70 is sandwiched between the transaxle case 222 and the converter housing 221 via the elastic members 742, 85 and the like in the first and second fixing portions 74, 75 and the third fixing portion 76.
- the reservoir plate 70 is clamped by the converter housing 221 and the transaxle case 222 via the elastic members 742 and the elastic members 85 of the first to third fixing portions 74 to 76, so that the reservoir plate 70 is bolted. Since it can fix to the transmission case 22 without using etc., the assembly property of the power transmission device 20 can be improved.
- the reservoir plate 70 partitions the inside of the transmission case 22 into a differential chamber 60 and a hydraulic oil storage chamber 65 as shown in FIGS.
- a seal member 80 formed of a rubber material or the like is provided between the outer peripheral edge 72a of the flange portion 72 of the reservoir plate 70 and the inner peripheral surface 222n of the transaxle case 222 and the inner peripheral surface of the rib portion 222r. Is installed. That is, a seal that extends along the inner peripheral surface 222 n of the transaxle case 222 and prevents the hydraulic oil from flowing from the hydraulic oil storage chamber 65 into the differential chamber 60 at the outer peripheral edge 72 a of the flange portion 72. Parts are provided. As shown in FIGS.
- the outer peripheral edge portion 72a of the flange portion 72 includes a seal holding portion 77 that can hold the seal member 80 in a range below the diff ring surrounding portion 73 (however, in FIG. 9). The description of the seal member 80 is omitted).
- the seal holding portion 77 has side surfaces 721 and 722 on both sides (the differential chamber 60 side and the hydraulic oil storage chamber 65 side) near the outer peripheral edge 72 a of the flange portion 72. It is configured by forming a groove into which the seal member 80 is fitted on the outer peripheral surface of the widened portion slightly protruded in the axial direction.
- the seal holding portion 77 is formed from the vicinity of the lower edge portion 73d of the diffring surrounding portion 73 along the outer peripheral edge portion 72a of the flange portion 72 to the approximately half circumference of the flange portion 72, and the seal holding portion.
- the end of the portion 77 opposite to the lower edge portion 73d of the diff ring enclosure 73 is positioned slightly below the diff ring enclosure 73 (see FIG. 10). Further, as shown in FIG. 12, engagement concave portions 77 o that can be engaged with engagement protrusions 80 t formed at both ends of the seal member 80 are formed at both ends of the seal holding portion 77.
- the seal member 80 is fitted into the groove of the seal member 77 so that the engagement protrusions 80t at both ends engage with the engagement recesses 77o, and is thereby positioned with respect to the flange portion 72 of the reservoir plate 70. Then, the reservoir plate 70 on which the seal member 80 is positioned is fixed to the transmission case 22 as described above, whereby the outer peripheral edge 72a of the flange 72 of the reservoir plate 70 and the inner peripheral surface 222n of the transaxle case 222 are fixed. And the seal member 80 is interposed between the inner peripheral surface of the rib part 222r.
- the hydraulic oil storage chamber 65 is interposed between the outer peripheral edge portion 72a of the flange portion 72 below the diff ring surrounding portion 73 and the inner peripheral surface 222n of the transaxle case 222 and the inner peripheral surface of the rib portion 222r.
- the stored hydraulic oil can be satisfactorily suppressed by the seal member 80 from flowing into the differential chamber 60.
- the diffring enclosure 73 of the reservoir plate 80 is formed integrally with the flange 72, no gap is formed between the diffring enclosure 73 and the flange 72, and the diffring enclosure The hydraulic oil does not flow into the differential chamber 60 from between 73 and the flange portion 72.
- the seal holding portion 77 is formed so that the end portion on the opposite side to the lower edge portion 73d of the diff ring surrounding portion 73 is positioned slightly below the def ring surrounding portion 73.
- the seal holding portion 77 may be formed such that the end opposite to the lower edge portion 73 d is positioned above the diffring surrounding portion 73.
- the seal holding portion 77 is provided between the outer peripheral edge portion 72a of the flange portion 72 and the inner peripheral surface 222n and the rib portion 222r of the transmission case 22 except for the position where the diff ring surrounding portion 73 and the cutout portion 70s are formed. You may be comprised so that the sealing member 80 can be interposed.
- the side surface 721 on the hydraulic oil storage chamber 65 side of the flange portion 72 of the reservoir plate 70 has a plurality of (in this embodiment, for adsorbing foreign matters contained in the hydraulic oil.
- Three magnets 90 are attached at intervals in the circumferential direction.
- Each magnet 90 protrudes from the side surface 721 and is held by a pair of claw portions 72t formed integrally with the flange portion 72 so as to face each other in the vertical direction in this embodiment.
- the two claw portions 72t facing each other can be elastically deformed in the vertical direction in FIG. 5 and hold the magnet fitted from the cylindrical portion 71 side toward the flange portion 72 so as not to fall off.
- the magnet 90 can be easily fixed to the reservoir plate 70. Further, if the reservoir plate 70 is arranged in the transmission case 22, the hydraulic oil storage chamber 65 can be defined, and at the same time, the magnet 90 can be arranged in the hydraulic oil storage chamber 65. Foreign matters contained in the hydraulic oil in the storage chamber 65 can be removed well. Furthermore, since the magnet 90 is held by the pair of claw portions 72t, the magnet 90 can be easily and reliably fixed to the reservoir plate 70 even if the reservoir plate 70 is formed of a resin that is a non-magnetic material. It is possible to reduce the weight of the reservoir plate 70.
- a contact portion 721 a that extends between the pair of claw portions 72 t in the circumferential direction and protrudes toward the magnet 90 is formed on the side surface 721 of the flange portion 72.
- the magnet 90 is held by the pair of claw portions 72t while being in contact with the contact portion 721a.
- an oil passage 72o through which hydraulic oil can flow is formed between the side surface 721 of the flange portion 72 and the surface of the magnet 90 on the side surface 721 side.
- foreign matter in the hydraulic oil that has flowed into the oil passage 72o can be adsorbed to the surface of the magnet 90 on the reservoir plate 70 side and retained in the oil passage 72o.
- a plurality of movement restricting walls 721b are formed in the abutting portion 721a so as to abut on the side end surfaces of the corresponding magnets 90 (left or right end surface in FIG. 3). .
- the movement restricting wall 721b is formed to be taller than at least the contact portion 721a.
- the first fixing portion 74 of the reservoir plate 70 is located in the vicinity of the attachment position of the magnet 90, that is, the position where the attachment position of the magnet 90 overlaps in the radial direction outside and in the circumferential direction. Is formed. More specifically, the first fixing portion 74 overlaps with the magnet 90 at the center in the circumferential direction in the longitudinal direction of the attachment range of the magnet 90, that is, the magnet 90 fixed at the attachment position in the circumferential direction. Formed in position. As a result, local vibrations generated on the reservoir plate 70 with the first fixing portion 74 as a fulcrum due to the weight of the magnet 90 during traveling of the vehicle on which the power transmission device 20 is mounted are further suppressed. It becomes possible.
- the durability of the reservoir plate 70 and the oil tightness between the outer peripheral edge 72a of the flange portion 72 of the reservoir plate 70 and the inner peripheral surface 222n of the transaxle case 222 and the inner peripheral surface of the rib portion 222r are good. Can be secured. Further, the reservoir plate 70 is sandwiched between the converter housing 221 and the transaxle case 222 via the elastic members 742 and the elastic members 85 of the first to third fixing portions 74 to 76. Thereby, even if vibration is generated in the reservoir plate 70 due to the weight of the magnet 90, the vibration can be absorbed by the elastic member 742 and the elastic member 85, so that the durability of the reservoir plate 70 is further improved. It becomes possible.
- an oil passage structure for supplying hydraulic oil as a lubrication / cooling medium to the differential gear 50 and the bearing 82 supporting the differential gear 50 from a hydraulic control device (not shown) will be described.
- the converter housing 221 is connected to a hydraulic control device (not shown) and communicates with the through hole 85 o of the elastic member 85 fitted in the cylindrical portion 761 of the third fixing portion 76.
- An inner oil passage 221a is formed.
- the transaxle case 222 is formed with an in-case oil passage 222a that communicates with the hollow portion 762o of the fitting portion 762 of the third fixing portion 76 fitted in the hole portion 222o.
- the oil passage 222a in the case opens near the bearing 82 that rotatably supports the differential case 54 of the differential gear 50.
- hydraulic oil from a hydraulic control device (not shown) is supplied to the oil passage 221a in the converter housing 221, the through hole 85o in the elastic member 85, the second hollow portion 761b in the cylindrical portion 761, the hollow portion 762o in the fitting portion 762, and the transformer.
- Supplying to the bearing 82 via the in-case oil passage 222a of the axle case 222 makes it possible to lubricate and cool the bearing 82.
- hydraulic oil is supplied into the converter housing 221 through an oil hole 221 b (see FIG. 4) formed in the converter housing 221.
- a pipe 87, an oil hole 221c formed in the converter housing 221, a hydraulic oil supply pipe 88 connected to the hydraulic oil supply pipe 87 via an oil passage (not shown) and the oil hole 221d are disposed.
- the hydraulic oil supply pipe 87 is disposed so as to bypass the cylindrical portion 71 of the reservoir plate 70 in the converter housing 221.
- the hydraulic oil supply pipe 88 is disposed so as to be positioned at least above the opening 71 o formed in the cylindrical portion 71 of the reservoir plate 70, and an oil hole 221 e formed in the converter housing 221. Connected to.
- the hydraulic oil supply pipe 88 at least one hydraulic oil supply hole 88o is formed above the opening 71o of the tubular portion 71.
- the oil hole 221e communicates with an oil passage 221f formed in the converter housing 221 and opened near the bearing 81.
- the hydraulic oil from the hydraulic oil supply pipe 88 can be supplied to the bearing 81 via the oil hole 221e and the oil passage 221f, and the bearing 81 can be lubricated and cooled.
- At least a part of the hydraulic oil supplied to the bearing 81 is transferred from the differential chamber 60 to the hydraulic oil storage chamber 65 through a defined clearance between the cylindrical portion 71 of the reservoir plate 70 and the converter housing 221. Discharged.
- the diff ring gear 45 rotates in the direction indicated by the broken-line arrow in FIGS. 3 and 9, and the differential gear 50 and the bearing
- the hydraulic oil scooped up by the diff ring gear 45 is discharged to the outside of the differential chamber 60 through the openings 731o and 732o of the diff ring enclosure 73 of the reservoir plate 70.
- the torsion direction of the diff ring gear 45 which is a helical gear, is such that each tooth of the diff ring gear 45 moves the hydraulic oil in the def chamber 60 to the flange portion 72 side of the reservoir plate 70 when the vehicle travels forward. It is stipulated to scrape up. As a result, it is possible to better discharge the hydraulic oil scraped up by the differential ring gear 45 to the outside of the differential chamber 60 through the openings 731o and 732o reaching the substantially central portion in the radial direction of the flange portion 72. Become.
- the inner peripheral surface of the diffring enclosure 73 is formed with inner peripheral protrusions 731b and 732b extending along the upper edge of the openings 731o and 732o.
- the hydraulic oil scooped up by the contact with the lower surface of the inner peripheral protrusions 731b and 732b is guided to the openings 731o and 732o.
- the hydraulic oil can be discharged even better to the outside of the differential chamber 60 through the openings 731o and 732o.
- the hydraulic fluid discharged from the openings 731o and 732o to the outside of the differential chamber 60 flows between the outer peripheral surface of the differential ring surrounding portion 73 and the inner peripheral surface 222n of the transaxle case 222.
- the openings are discharged from the openings 731o and 732o.
- the hydraulic fluid that has come into contact with the outer peripheral projections 731 a and 732 a is guided to the lower side of the reservoir plate 70.
- the hydraulic oil flowing downward of the reservoir plate 70 is applied to the outer peripheral side protruding portion 731a that protrudes radially outward along the upper edge portion of the opening 731o or the lower edge portion 73d of the diffring enclosure 73.
- the projection 73t projecting radially outward along the cylindrical portion 71 is guided to the cylindrical portion 71 side and flows into the hydraulic oil storage chamber 65 through the outer peripheral surface of the cylindrical portion 71 and the side surface 721 of the flange portion 72.
- the protrusion 73t by extending the protrusion 73t to the outer peripheral edge 72a (above the position where the seal member 80 is provided) of the flange 72 so as to incline downward as approaching the hydraulic oil storage chamber 65, It becomes possible to guide the hydraulic oil to the hydraulic oil reservoir 65 satisfactorily by the protrusion 73t.
- the outer peripheral side protruding portion 732a formed along the edge of the opening 732o is such that the hydraulic oil that travels from the upper side of the opening 732o through the outer peripheral surface of the diffring enclosure 73 from the opening 732o to the differential chamber 60. It also plays a role in regulating inflow.
- the seal member 80 is interposed between the outer peripheral edge portion 72a of the flange portion 72 of the reservoir plate 70 and the inner peripheral surface 222n of the transaxle case 222 and the inner peripheral surface of the rib portion 222r.
- the hydraulic oil discharged from the openings 731o and 732o to the outside of the differential chamber 60 is from between the outer peripheral edge 72a of the flange 72 and the inner peripheral surface 222n of the transaxle case 222 and the inner peripheral surface of the rib 222r.
- the sealing member 80 can suppress the flow into the differential chamber 60 again.
- the reservoir plate 70 as a partition member that partitions the inside of the transmission case 22 of the power transmission device 20 into the differential chamber 60 and the hydraulic oil storage chamber 65 is a cylindrical portion that covers a part of the differential gear 50. 71 and a flange portion 72 extending in the radial direction from the tubular portion 71. The cylindrical portion 71 and the flange portion 72 are integrally formed, and a seal member 80 is interposed between the transmission case 22 (transaxle case 222) and the outer peripheral edge portion 72a of the flange portion 72. .
- the working oil flows into the outer peripheral edge 72 a of the flange portion 72 along the inner peripheral surface 222 n of the transmission case 22 (transaxle case 222) and flows from the working oil storage chamber 65 to the differential chamber 60.
- a seal portion is provided to suppress this.
- no gap is formed between the tubular portion 71 and the flange portion 72, so that hydraulic oil does not flow into the differential chamber 60 from between the tubular portion 71 and the flange portion 72.
- the inflow of the hydraulic oil from the hydraulic oil storage chamber 65 to the differential chamber 60 is restricted by the seal member 80.
- the reservoir plate 70 also has a diff ring surrounding portion 73 extended from the outer peripheral edge portion 72a of the flange portion 72 so as to cover a part of the diff ring gear 45 from above without interfering with the drive pinion gear 44.
- the portion 73 is molded integrally with the cylindrical portion 71 and the flange portion 72, and the seal member 80 is provided at least in a range below the diff ring surrounding portion 73.
- the seal member 80 restricts the flow of the hydraulic oil from the hydraulic oil storage chamber 65 to the differential chamber 60. Therefore, the inflow of the hydraulic oil into the differential chamber 60 can be suppressed even better.
- the diffring enclosure 73 has openings 731o and 732o.
- the hydraulic oil that has flowed into the differential chamber 60 can be swept up by the differential ring gear 45 and discharged out of the differential chamber 60 from the openings 731o and 732o of the differential ring surrounding portion 73.
- the seal member 80 is provided in a range below the diff ring surrounding portion 73 of the outer peripheral edge portion 72a of the flange portion 72, the operation discharged from the opening portions 731o and 732o to the hydraulic oil storage chamber 65 side.
- the seal member 80 can prevent the oil from flowing again into the differential chamber 60 from between the outer peripheral edge 72 a of the flange portion 72 and the transaxle case 222, only the scraping action by the differential ring gear 45. As a result, it is possible to very well prevent the hydraulic oil from staying in the differential chamber 60.
- the two openings 731o and 732o are formed in the diffring enclosure 73. However, it is sufficient that at least one opening is formed in the diffring enclosure 73.
- the diff ring enclosure 73 has a protrusion 73t that protrudes from the outer peripheral surface of the diff ring enclosure 73 along a lower edge 73d extending in the axial direction of the diff ring gear 45 below the openings 731o and 732o.
- the hydraulic oil that has been scraped up by the differential ring gear 45 and discharged from the openings 731o and 732o of the differential ring surrounding portion 73 to the outside of the differential chamber 60 is located in the differential chamber 60 from the vicinity of the lower edge 73d of the differential ring surrounding portion 73. It is possible to satisfactorily suppress the inflow of the liquid into the water by the protrusion 73t.
- the projecting portion 73t is formed up to the outer peripheral edge portion 72a of the flange portion 72 (above the position where the seal member 80 is provided) so as to incline downward as approaching the hydraulic oil storage chamber 65.
- the hydraulic oil discharged from the openings 731o and 732o to the outside of the differential chamber 60 can be favorably guided to the hydraulic oil storage chamber 65 side by the protrusion 73t.
- FIG. 13 is a side view showing a reservoir plate 70B according to another embodiment.
- the reservoir plate 70 ⁇ / b> B omits the protrusion 73 t of the diffring enclosure 73 from the reservoir plate 70, and has a seal holding part 77 ⁇ / b> B instead of the seal holding part 77.
- the seal holding portion 77B has the same configuration as the seal holding portion 77.
- the seal holding portion 77B includes a lower edge 73d of the diffring enclosure 73 and a lower edge 73d. It is also formed on the outer peripheral edge portion 73a extending in the circumferential direction up to the third fixing portion 76.
- the hydraulic oil that has been scraped up by the differential ring gear 45 and discharged from the openings 731o and 732o of the differential ring surrounding portion 73 to the outside of the differential chamber 60 is near the lower edge portion 73d and the outer peripheral edge portion 73a of the differential ring surrounding portion 73. It is possible to satisfactorily suppress the flow from flowing again into the differential chamber 60 by the seal member 80 between the lower edge 73d and the outer peripheral edge 73a and the transaxle case 222.
- the seal member 80 is interposed between at least the outer peripheral edge portion 72a of the flange portion 72, the lower edge portion 73d of the differential ring surrounding portion 73, and the inner peripheral surface 222n of the transaxle case 222 and the inner peripheral surface of the rib portion 222r. It only has to be installed.
- FIG. 14 is a front view showing the inside of the transaxle case 222B in which the reservoir plate 70C is arranged
- FIGS. 15 and 16 are a side view and a perspective view showing the reservoir plate 70.
- FIG. 14 to 16 a part of the description of the upper portion of the reservoir plate 70C is omitted.
- the reservoir plate 70C includes a cylindrical portion 71C extending in the axial direction of the diff ring gear 45 so as to cover a part of the differential gear 50 from the outside, and a diff ring gear from the cylindrical portion 71C.
- 45 includes a flange portion 72C that extends outward in the radial direction, and a diffring enclosure portion 73C that extends from the outer peripheral edge portion 72a of the flange portion 72C.
- the reservoir plate 70C including the cylindrical portion 71C, the flange portion 72C, and the diffring surrounding portion 73C is also integrally formed with resin.
- the reservoir plate 70C may be formed of a material other than resin.
- the cylindrical portion 71 ⁇ / b> C is formed in a substantially cylindrical shape so as to extend along a part of the outer peripheral surface of the differential gear 50 (difference case 54), and mainly the differential gear 50.
- the portion to which the differential ring gear 45 is attached and the portion excluding the end opposite to the differential ring gear 45 are enclosed.
- a fixing portion 711 that is fixed to the transmission case 22B is formed on the side portion of the cylindrical portion 71C.
- the flange portion 72 ⁇ / b> C extends in a substantially arc shape from one end of the tubular portion 71 ⁇ / b> C on the defling gear 45 side (left side in FIG.
- the flange portion 72C has a notch portion 721s cut away so as to avoid interference with the drive pinion gear 44 and a transaxle case 222B that comes into contact with the fixing portion 711 of the cylindrical portion 71C. It has a cutout portion 722s cut out to avoid interference.
- the transaxle case 222B is below the horizontal plane X including the axis 45o of the diffring gear 45 (see the alternate long and short dash line shown in FIGS. 14 and 15).
- the inner peripheral surface 222n is formed so as to extend in a circular arc shape along the outer periphery of the diff ring gear 45 and to surround the substantially lower half of the diff ring gear 45.
- the inner peripheral surface 222n is formed across a portion extending from the side wall portion to the bottom portion of the transaxle case 222B and a rib portion 222r formed in the transaxle case 222B. As shown in FIG.
- the flange portion 72C is formed so as to extend along the inner peripheral surface 222n of the transaxle case 222B in a state where the reservoir plate 70C is disposed in the transaxle case 222B.
- a lower edge 72d is provided as a part of the outer peripheral edge 72a. Both ends of the lower edge portion 72d of the flange portion 72C and the inner peripheral surface 222n of the transaxle case 222B in the circumferential direction store hydraulic oil when the vehicle on which the power transmission device 20B is mounted stops or travels on a flat road.
- the oil level Y of the hydraulic oil in the chamber 65 (see, for example, the two-dot chain line shown in FIG. 14, hereinafter simply referred to as “the oil level Y of the hydraulic oil in the hydraulic oil storage chamber 65”). It is formed.
- the differential ring surrounding portion 73C extends from the upper portion of the flange portion 72C toward the opposite side of the tubular portion 71C in the axial direction of the differential ring gear 45. As shown in FIGS. 15 and 16, the diff ring surrounding portion 73C is formed in a substantially arc shape along the outer peripheral surface of the diff ring gear 45, and the def ring gear in a state where the reservoir plate 70C is disposed in the transmission case 22B. Approximately one-fourth of the outer peripheral surface of 45 is covered from above.
- a fixing portion (not shown) that is fixed to the transmission case 22B is formed on the upper portion of the diffring surrounding portion 73C.
- the flange portion 72C and the diff ring surrounding portion 73C have first and second openings 721o and 722o formed along the circumferential direction of the diff ring gear 45.
- the first opening 721o extends from the substantially central portion of the flange portion 72C in the radial direction of the diff ring gear 45 to the substantially central portion of the diff ring surrounding portion 73C in the axial direction of the diff ring gear 45. It is formed across 73C.
- the second opening 722o is formed so as to reach from the substantially central portion of the flange portion 72C in the radial direction of the diff ring gear 45 to the outer peripheral edge of the flange portion 72C.
- the upper edge of the second opening 722o extends to a substantially central portion in the axial direction of the diffring enclosure 73C by cutting out a part of the lower edge 73d of the diffring enclosure 73C.
- the flange portion 72C and the diffring surrounding portion 73C extend along the upper edges of the first and second openings 721o and 722o, respectively, and are on the hydraulic oil storage chamber 65 side (right side in FIG. 15) of the flange portion 72C. It has the 1st and 2nd protrusion guide parts 721t and 722t formed so that it may protrude from the outer peripheral surface of the surface and diff ring surrounding part 73C.
- the flange portion 72C extends along the lower edge of the second opening portion 722o so as to cover the lower portion of the second opening portion 722o, and the hydraulic oil storage chamber 65 side of the flange portion 72C (right side in FIG. 15).
- the third protrusion guide portion 723t is formed so as to protrude from the surface.
- the reservoir plate 70C configured as described above is disposed in the transaxle case 222B so that the lower edge portion 72d of the flange portion 72C is in contact with the inner peripheral surface 222n of the transaxle case 222B. Is done. Then, a converter housing (not shown) is fastened to the transaxle case 222B from the front side in FIG. 14 with a plurality of bolts, whereby the reservoir plate 70C is attached to the fixed portion 711 formed on the cylindrical portion 71C or the diffring surrounding portion 73C. The formed fixing portion (not shown) is sandwiched between the converter housing and the transaxle case 222B. Accordingly, the reservoir plate 70C is fixed to the transmission case 22B, and the inside of the transmission case 22B is partitioned into the differential chamber 60 and the hydraulic oil storage chamber 65 by the reservoir plate 70C.
- FIG. 17 is an enlarged cross-sectional view along the line AA shown in FIG.
- the flange portion 72C of the reservoir plate 70C extends in an arc shape along the lower edge portion 72d and protrudes toward the hydraulic oil storage chamber 65 from the lower edge portion 72d. It has the elastic protrusion part (oil chamber definition part) 100 formed in this.
- the elastic protrusion 100 extends from the notch 722 s of the flange 72 ⁇ / b> C to below the third protrusion guide 723 t below the horizontal plane X including the axis 45 o of the diff ring gear 45. It is formed to extend along the lower edge 72d. However, a part of the flange portion 72C below the third protruding guide portion 723t is cut away, and a slight clearance is provided between the third protruding guide portion 723t and the elastic protruding portion 100. As a result, the elastic protrusion 100 has an opening end 100a that opens below the third protrusion guide portion 723t and an opening end 100b that opens at the notch 722s. The open ends 100a and 100b are located above the oil level Y of the hydraulic oil in the hydraulic oil storage chamber 65.
- the elastic protrusion 100 stores hydraulic oil from the base portion 72 b of the flange portion 72 ⁇ / b> C extending from the outer peripheral surface of the cylindrical portion 71 ⁇ / b> C toward the outer peripheral side of the flange portion 72 ⁇ / b> C via the first bending portion 101.
- a first inclined portion 102 extending so as to incline toward the chamber 65 (right side in FIG. 6), and from one end of the first inclined portion 102 to the outer peripheral side of the flange portion 72C via the second and third curved portions 103 and 104
- a second inclined portion 105 extending so as to incline toward the differential chamber 60 (left side in FIG. 6) as it goes, and a lower portion formed at one end of the second inclined portion 105 and in contact with the inner peripheral surface 222n of the transaxle case 222B.
- a distal end portion 106 extending toward the side edge portion 72d.
- the first and second bending portions 101 and 103 are formed to be bent at a larger angle than the third bending portion 104, as shown in FIG. Further, the first inclined portion 102 is formed longer in the radial direction and the axial direction of the diff ring gear 45 than the second inclined portion 105.
- the distal end portion 106 extends from one end of the second inclined portion 105 to the lower edge portion 72d so as to gradually taper toward the hydraulic oil storage chamber 65 side (right side in FIG. 17). That is, the surface of the distal end portion 106 on the differential chamber 60 side (left side in FIG. 17) is closer to the hydraulic oil storage chamber 65 side (right side in FIG. 17) as it approaches the lower edge 72d from one end of the second inclined portion 105. It extends to incline.
- Such an elastic protrusion 100 is elastically deformed mainly in the radial direction of the diff ring gear 45 at the first, second and third curved portions 101, 103, 104 when the reservoir plate 70C is fixed to the transmission case 22B.
- the third bending portion 104 is mainly elastically deformed from the state indicated by the broken line to the state indicated by the solid line in FIG. 17). That is, the lower edge portion 72d of the flange portion 72C is elastically pressed against the inner peripheral surface 222n of the transaxle case 222B in a state where the reservoir plate 70C is fixed to the transmission case 22B.
- the lower edge portion 72d of the lower edge portion 72d prevents the hydraulic oil from flowing from the hydraulic oil reservoir chamber 65 into the differential chamber 60 without separately attaching a seal member to the lower edge portion 72d of the flange portion 72C.
- the elastic protrusion 100 is formed thinner than the base 72 b of the flange 72 that extends from the outer peripheral surface of the differential cover 71 to the elastic protrusion 100.
- the elastic protrusion part 100 can be elastically deformed more favorably in the first, second and third bending parts 101, 103, 104.
- the elastic protrusion 100 by forming a plurality of curved portions (first, second and third curved portions 101, 103, 104) in the elastic protrusion 100, the radial direction and the axial direction of the diff ring gear 45 of the elastic protrusion 100 can be provided. Since the length can be secured sufficiently, even if the elastic protrusion 100 is formed thinner than the base 72b of the flange 72, the strength can be sufficiently secured.
- first and second bending portions 101 and 103 are formed to bend at a larger angle than the third bending portion 104, and the first inclined portion 102 is relatively long in the radial direction and the axial direction of the diff ring gear 45.
- the reaction force received by the reservoir plate 70 can be further reduced by elastically pressing the lower edge 72d against the inner peripheral surface 222n of the transaxle case 222.
- the elastic protrusion 100 has at least one curved portion so that the lower edge portion 72d of the flange portion 72 can be elastically brought into contact with the inner peripheral surface 222n of the transaxle case 222B. I just need it.
- the surface on the differential chamber 60 side of the front end portion 106 extends so as to incline toward the hydraulic oil storage chamber 65 as it approaches the lower edge portion 72d from one end of the second inclined portion 105.
- the reservoir plate 70C can be inserted into the transaxle case 222B from the right side in FIG. 17 so that the distal end portion 106 rides on the inner peripheral surface 222n of the transaxle case 222B.
- the elastic protrusion 100 is easily elastically deformed from the state indicated by the broken line to the state indicated by the solid line in FIG.
- the portion 72d can be elastically pressed against the inner peripheral surface 222n of the transaxle case 222B.
- the shape of the tip 106 is not limited to that shown in the present embodiment.
- the diff ring gear 45 is configured as a bevel gear and has a main rotational direction, that is, a rotational direction when the vehicle on which the power transmission device 20 is mounted travels forward ( When rotating in the direction of a broken line arrow in FIG. 14, the hydraulic oil in the differential chamber 60 is arranged to be scraped up obliquely to the hydraulic oil storage chamber 65 side (right side in FIG. 15).
- the first and second openings 721o and 722o are formed in the flange portion 72C and the differential ring surrounding portion 73C of the reservoir plate 70C.
- the hydraulic oil in the differential chamber 60 scraped up by the rotation of the differential ring gear 45 is transferred to the first and second openings 721o and 722o and the differential ring. It can be satisfactorily discharged from the vicinity of the lower edge 73d of the surrounding portion 73C to the outside of the differential chamber 60, that is, to the hydraulic oil storage chamber 65.
- first and second projecting guide portions 721t and 722t extending along upper edges of the first and second opening portions 721o and 722o are formed in the flange portion 72C and the diffring surrounding portion 73C.
- the hydraulic oil discharged from the first and second openings 721o and 722o and colliding with the first and second projecting guide portions 721t and 722t is guided well downward and toward the hydraulic oil storage chamber 65. It becomes possible to satisfactorily suppress oil from flowing again into the differential chamber 60 from the first and second openings 721o and 722o.
- first and second projecting guide portions 721t and 722t have the hydraulic fluid flowing down from above the first and second openings 721o and 722o, respectively, from the first and second openings 721o and 722o. It also functions to suppress the flow into the chamber 60.
- the elastic protrusion 100 formed on the flange portion 72C of the reservoir plate 70C functions as an oil passage defining portion that defines an oil passage 60o extending through the differential chamber 60. That is, as shown in FIG. 17, the region surrounded by the elastic protrusion 100 in the differential chamber 60 extends in the circumferential direction of the differential ring gear 45 along the lower edge portion 72 d and the hydraulic oil. An oil passage 60o projecting toward the storage chamber 65 is formed. Further, as described above, the elastic protrusion 100 has the opening end 100a that opens below the third protrusion guide part 723t. Thereby, the oil passage 60o extending in the differential chamber 60 is communicated with the space on the hydraulic oil storage chamber 65 side (the right side in FIG. 15) via the opening end 100a.
- the hydraulic oil that stays in the lower portion of the differential chamber 60 is pushed by the teeth of the differential ring gear 45 and protrudes toward the hydraulic oil storage chamber 65.
- a flow is formed in the oil passage 60 o toward the traveling direction side of the main rotation direction of the diff ring gear 45.
- the hydraulic oil in the oil passage 60 o goes out of the differential chamber 60 from the opening end 100 a that opens on the traveling direction side in the main rotation direction of the differential ring gear 45 relative to the oil level Y of the hydraulic oil in the hydraulic oil storage chamber 65. And flows into the hydraulic oil storage chamber 65.
- the oil can be discharged to the outside of the differential chamber 60, that is, to the hydraulic oil storage chamber 65 through the oil passage 60 o defined by the elastic protrusion 100 of the reservoir plate 70 C while utilizing the rotation of the differential ring gear 45. Therefore, it is possible to further improve the discharge performance of the hydraulic oil in the differential chamber 60 defined by the reservoir plate 70C.
- the elastic protrusion 100 is formed below the horizontal plane X including the axis 45o of the diff ring gear 45.
- the hydraulic oil staying in the lower portion of the differential chamber 60 can be discharged to the outside of the differential chamber 60 through the oil passage 60o defined by the elastic protrusion 100.
- the third projecting guide portion 723t projecting from the flange portion 72C so as to cover the lower portion of the second opening portion 722o formed in the flange portion 72C is provided on the opening end 100a of the elastic projecting portion 100. It is formed above. Thereby, it becomes possible to satisfactorily suppress the hydraulic oil discharged from the second opening 722o from flowing again into the differential chamber 60 through the opening end 100a.
- the hydraulic oil that has flowed into the differential chamber 60 is satisfactorily discharged to the hydraulic oil storage chamber 65 via the reservoir plate 70C, and the discharged hydraulic oil and It is possible to satisfactorily suppress the hydraulic oil or the like in the hydraulic oil storage chamber 65 from flowing into the differential chamber 60. Therefore, it is possible to satisfactorily suppress the hydraulic oil from staying in the differential chamber 60 and to further reduce the rotational resistance (stirring resistance) of the differential ring gear 45.
- the flange portion 72C does not necessarily have a curved portion as long as the lower edge portion 72d can be elastically pressed against the inner peripheral surface 222n of the transaxle case 222B.
- the flange portion 72C extends from the tubular portion 71 in parallel to the radial direction of the diff ring gear 45, and the lower edge portion 72d is elastically pushed against the inner peripheral surface 222n of the transaxle case 222B while curving a part thereof. You may guess.
- the elastic protrusion 100 may extend upward from the horizontal plane X including the axis 45o of the diff ring gear 45.
- the differential ring gear 45 disposed below the input side drive pinion gear 44 and meshed with the drive pinion gear 44, the differential gear 50 coupled to the differential ring gear 45, the differential ring gear 45, and the differential gear. 50, a reservoir plate 70 as a partition member that divides the transmission case 22 into a differential chamber 60 in which the differential ring gear 45 and the differential gear 50 are disposed, and a hydraulic oil storage chamber 65 in which hydraulic fluid is stored.
- the power transmission device 20 having the above structure corresponds to the “power transmission device”, and the cylindrical portion 71 that covers a part of the differential gear corresponds to the “cylindrical portion”, and extends from the cylindrical portion 71 in the radial direction.
- the flange portion 72 corresponds to a “flange portion”
- a diffring enclosure 73 extending from the outer peripheral edge 72 a of the flange 72 so as to cover a part of the diffring gear 45 from above without interfering with the live pinion gear 44 corresponds to a “defring enclosure”.
- the sealing member 80 provided on the outer peripheral edge portion 72a of the outer peripheral edge portion 72a corresponds to the “sealing portion”, and the opening portions 731o and 732o formed in the diffring surrounding portion 73 correspond to the “opening portion”.
- a protrusion 73 t protruding from the outer peripheral surface of the diffring enclosure 73 along the lower edge 73 d extending in the axial direction of 45 corresponds to a “protrusion”.
- the present invention can be used in the power transmission device manufacturing industry and the like.
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Abstract
Description
入力側のドライブピニオンギヤより下方に配置されると共に該ドライブピニオンギヤと噛合するデフリングギヤと、該デフリングギヤに連結されるデファレンシャルギヤと、前記デフリングギヤおよび前記デファレンシャルギヤを収容するケースと、前記ケース内を前記デフリングギヤおよび前記デファレンシャルギヤが配置されるデフ室と作動油を貯留する作動油貯留室とに区画する区画部材とを備える動力伝達装置において、
前記区画部材は、前記デファレンシャルギヤの一部を覆う筒状部と、前記筒状部から径方向に延出されたフランジ部とを有し、
前記筒状部および前記フランジ部は一体に成形されており、
前記フランジ部の外周縁部には、前記ケースの内周面に沿って延在して前記作動油貯留室から前記デフ室へと作動油が流入するのを抑制するシール部が設けられることを特徴とすることを特徴とする。
Claims (9)
- 入力側のドライブピニオンギヤより下方に配置されると共に該ドライブピニオンギヤと噛合するデフリングギヤと、該デフリングギヤに連結されるデファレンシャルギヤと、前記デフリングギヤおよび前記デファレンシャルギヤを収容するケースと、前記ケース内を前記デフリングギヤおよび前記デファレンシャルギヤが配置されるデフ室と作動油を貯留する作動油貯留室とに区画する区画部材とを備える動力伝達装置において、
前記区画部材は、前記デファレンシャルギヤの一部を覆う筒状部と、前記筒状部から径方向に延出されたフランジ部とを有し、
前記筒状部および前記フランジ部は一体に成形されており、
前記フランジ部の外周縁部には、前記ケースの内周面に沿って延在して前記作動油貯留室から前記デフ室へと作動油が流入するのを抑制するシール部が設けられることを特徴とする動力伝達装置。 - 前記シール部は、前記フランジ部の前記外周縁部を前記ケースに弾性的に押し当てることにより形成されることを特徴とする請求項1に記載の動力伝達装置。
- 前記フランジ部は、前記外周縁部と前記筒状部との間で該外周縁部に沿って延びる少なくとも一つの湾曲部を有し、
前記湾曲部の弾性変形によって前記フランジ部の前記外周縁部を前記ケースに弾性的に押し当てることを特徴とする請求項2に記載の動力伝達装置。 - 前記シール部は、前記ケースと前記フランジ部の前記外周縁部との間に設けられたシール部材であることを特徴とする請求項1に記載の動力伝達装置。
- 前記区画部材は、前記ドライブピニオンギヤと干渉することなく前記デフリングギヤの一部を上方から覆うように前記フランジ部の外周縁部から延出されたデフリング包囲部を有し、
前記デフリング包囲部は、前記筒状部および前記フランジ部と一体に成型されており、前記シール部は、少なくとも前記デフリング包囲部よりも下方の範囲に設けられることを特徴とする請求項1から4の何れか一項に記載の動力伝達装置。 - 前記デフリング包囲部は、少なくとも一つのするように開口することを特徴とする請求項5に記載の動力伝達装置。
- 前記デフリング包囲部は、前記開口部の下方で前記デフリングギヤの軸方向に延びる縁部に沿って該デフリング包囲部の外周面から突出する突出部を有することを特徴とする請求項6に記載の動力伝達装置。
- 前記突出部は、前記作動油貯留室に接近するにつれて下方側に傾斜するように前記フランジ部の前記外周縁部まで延出されることを特徴とする請求項7に記載の動力伝達装置。
- 前記開口部の下方で前記デフリングギヤの軸方向に延びる前記デフリング包囲部の縁部には、前記ケースの内周面に沿って延在して前記デフ室へと作動油が流入するのを抑制するシール部が設けられることを特徴とする請求項6に記載の動力伝達装置。
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JP2015523894A JP6128215B2 (ja) | 2013-06-28 | 2014-03-27 | 動力伝達装置 |
EP14816944.4A EP3037693A1 (en) | 2013-06-28 | 2014-03-27 | Power transmission device |
US14/888,155 US10018265B2 (en) | 2013-06-28 | 2014-03-27 | Power transmission device |
DE112014002195.4T DE112014002195T5 (de) | 2013-06-28 | 2014-03-27 | Antriebskraft-Übertragungsvorrichtung |
CN201480030466.4A CN105247249B (zh) | 2013-06-28 | 2014-03-27 | 动力传递装置 |
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