CN116353316A - Bearing support plate, reduction gear and electric drive for a motor vehicle - Google Patents

Bearing support plate, reduction gear and electric drive for a motor vehicle Download PDF

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Publication number
CN116353316A
CN116353316A CN202111624205.3A CN202111624205A CN116353316A CN 116353316 A CN116353316 A CN 116353316A CN 202111624205 A CN202111624205 A CN 202111624205A CN 116353316 A CN116353316 A CN 116353316A
Authority
CN
China
Prior art keywords
support plate
bearing support
wall
bearing
reduction mechanism
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.)
Pending
Application number
CN202111624205.3A
Other languages
Chinese (zh)
Inventor
樊振华
孔海洋
吴铁波
胡玲
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ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Priority to CN202111624205.3A priority Critical patent/CN116353316A/en
Priority to DE102022213905.4A priority patent/DE102022213905A1/en
Publication of CN116353316A publication Critical patent/CN116353316A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
    • B60K17/165—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing provided between independent half axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/40—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the assembly or relative disposition of components
    • 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
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • 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
    • F16H57/0426—Means for guiding lubricant into an axial channel of a shaft
    • 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
    • F16H57/043—Guidance of lubricant within rotary parts, e.g. axial channels or radial openings in shafts
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/001—Arrangement or mounting of electrical propulsion units one motor mounted on a propulsion axle for rotating right and left wheels of this axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
    • B60K2001/006—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2410/00—Constructional features of vehicle sub-units
    • B60Y2410/10—Housings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2410/00—Constructional features of vehicle sub-units
    • B60Y2410/102—Shaft arrangements; Shaft supports, e.g. bearings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

The invention provides a bearing support plate which is of a generally annular structure with a central through hole, wherein the bearing support plate is provided with a relief notch extending a part of the bearing support plate in an axial direction, the relief notch connects the periphery of the annular structure and the central through hole, the relief notch is defined by a first wall and a second wall in a circumferential direction, and a guide part which is continuous with the first wall and protrudes towards the central through hole is formed on the bearing support plate. The invention also relates to a reduction mechanism comprising the bearing support plate and an electric drive for a motor vehicle comprising the reduction mechanism.

Description

Bearing support plate, reduction gear and electric drive for a motor vehicle
Technical Field
The present invention relates to a bearing support plate, in particular for a differential bearing, a reduction mechanism comprising such a bearing support plate and an electric drive for a motor vehicle comprising such a reduction mechanism.
Background
To enhance the cruising of an electric or hybrid vehicle, a coaxial arrangement is typically employed to integrate the drive motor and the reduction mechanism together to form a compact electric drive to reduce the volume and weight of the electric drive. The hollow rotor shaft of the drive motor employing the coaxially arranged electric drive device extends into the reduction mechanism, and power is transmitted to the housing of the differential of the reduction mechanism via a pair of reduction gears arranged on the counter shaft, and two half shafts of the differential as output shafts, one of which extends through the hollow rotor shaft of the drive motor, transmit power to the wheels.
Due to the compact construction of the coaxially arranged electric drive, the cooling of the drive motor presents a great challenge.
Disclosure of Invention
The present invention provides a bearing support plate that solves the above-mentioned problems, in particular a bearing support plate for a differential housing in a reduction mechanism of a coaxially arranged electric drive. The bearing support plate is a substantially annular structure having a central through hole, characterized in that the bearing support plate has a relief notch extending a part of the bearing support plate in an axial direction, the relief notch connecting an outer periphery of the annular structure and the central through hole, the relief notch being defined in a circumferential direction by a first wall and a second wall, wherein the bearing support plate is formed with a guide portion continuous with the first wall protruding toward the central through hole.
Thanks to the presence of the guide portion, it is possible to guide the lubricating oil flowing along the first wall to a predetermined position, in particular to the inlet of the annular space between the hollow rotor shaft of the electric motor of the electric drive and the half shaft/output shaft of the differential, which falls inside the reduction mechanism, so as to promote the inflow of lubricating oil into this annular space for cooling the electric motor, in particular the rotor of the electric motor.
The invention also relates to a reduction gear comprising the bearing support plate and to an electric drive for a motor vehicle comprising the reduction gear.
Drawings
Fig. 1 is a cross-sectional view of an electric drive for a motor vehicle with a bearing support plate according to the invention;
FIG. 2 is a perspective view of a bearing support plate according to one embodiment of the invention;
fig. 3 is a view showing one side of the bearing support plate facing the bearing according to one embodiment of the present invention;
FIG. 4 is a view showing the other side of the bearing support plate facing away from the bearing in accordance with one embodiment of the present invention;
FIG. 5 is a longitudinal cross-sectional view of a bearing support plate according to one embodiment of the invention; and is also provided with
Fig. 6 is a cross-sectional view of a bearing support plate showing a guide portion and a flattened portion thereon according to one embodiment of the present invention.
Detailed Description
A further description of an embodiment according to the invention is provided below with reference to the accompanying drawings.
Fig. 1 shows an electric drive device 10 for a motor vehicle.
As shown in fig. 1, the electric drive comprises a motor module 11 and a reduction mechanism module 12, which are housed in two chambers of the electric drive. The hollow rotor shaft 23 of the motor module extends as an input shaft into the reduction gear module 12 through an end plate 24 which is part of the housing of the electric drive. The end 25 of the rotor shaft 23 that extends into the reduction gear module 12 is formed with a toothed portion (not shown) or a further gear is fixed thereto. The power of the rotor shaft 23 is transmitted to the differential 31 in the reduction mechanism module 12 via two gears (not shown) fixed on the other shaft (auxiliary shaft) parallel to the rotor shaft 23. Specifically, one of the two gears of the coaxial arrangement meshes with a toothed portion or gear on the end 25 of the rotor shaft 23 that extends into the reduction mechanism module 12, while the other gear meshes with a gear 32 on the differential housing. The gears 32 on the differential housing rotate the differential housing, which in turn is transmitted via internal planetary gears to two side gears arranged coaxially with the rotor shaft of the motor module. An output shaft 33 connected to the two side gears extends through the hollow rotor shaft 23 of the motor module 11.
As described above, since the differential case needs to rotate in operation, it is necessary to equip the differential case with bearings. The differential housing is supported by two bearings 34-1, 34-2. As shown, the bearing housing of the differential housing remote from the bearing 34-1 of the motor module 11 is provided directly by the housing 30 of the electric drive (specifically, the housing of the reduction mechanism module), while the bearing housing of the differential housing proximate to the bearing 34-2 of the motor module 11 is provided by the bearing support plate 40.
Fig. 2 to 6 show one embodiment of a bearing support plate 40 according to the present invention. The bearing support plate 40 is particularly used to provide a bearing seat for the bearing 34-2 of the differential housing in the reduction mechanism of a coaxially arranged electric drive.
In the art, coaxial arrangement means that the rotor shaft of the motor is arranged coaxially with the output shaft of the reduction mechanism (typically the half shaft of the differential), in particular that the rotor shaft of the motor is a hollow shaft through which the output shaft of the reduction mechanism extends. The hollow rotor shaft of the motor and the output shaft of the reduction mechanism define an annular space, the inlet of which is typically located adjacent the differential bearing.
As shown in fig. 1, the bearing support plate 40 is a generally annular structure with a central through bore that provides a bearing seat for the bearing of the differential housing and is secured (e.g., by means of bolts) to the housing of the electric drive. Generally, as shown in fig. 5, the bearing support plate 40 may be generally divided into a first portion 41 providing a bearing seat and a second portion 42 for securing to the housing. The first portion providing the bearing housing includes a bearing receiving portion 411 forming a portion of the central through hole and a bearing stopper portion 412 formed on one side of the bearing receiving portion, the bearing receiving portion 411 having a first inner diameter, the bearing stopper portion 412 having a second inner diameter smaller than the first inner diameter. The bearing stop divides the first portion 41 and the second portion 42 of the bearing support plate in the axial direction. In use, this first portion 41 is arranged close to the differential 31. The second portion 42 for fixing to the housing adjoins the first portion 41 in the axial direction and defines a portion of the central through hole. In use, the second portion 42 is disposed adjacent the motor module 11. In order to reduce the weight of the bearing support plate, the radius of the portion of the central through hole in the second portion 42 may be larger than the inner diameter of the portion of the central through hole in the bearing housing 411. In addition, in this embodiment, the outer periphery of the second portion 42 is formed with lugs 43, and bolt holes through which bolts pass are provided in the lugs 43.
In order to reduce the axial dimensions of the reduction gear module, the rotor shaft 23 of the motor module 11 typically extends into the bearing support plate 40, in particular into the central through hole of the bearing support plate 40 in the second portion 42, and the toothed portion or gear on the rotor shaft 23 meshes in this central through hole in the second portion 42 with one of the two gears described above (i.e. the driven wheel) fixed on the other shaft parallel to the rotor shaft. For this purpose, the bearing support plate 40 is formed with relief notches 44, as best shown in fig. 2, for receiving a portion of the driven wheel. However, it should be noted that the relief notch according to the present invention is not formed solely to accommodate a portion of the driven wheel. In case the rotor shaft of the motor module does not extend into the bearing support plate, a relief notch may still be formed for forming the lubrication oil guiding structure. Furthermore, due to the presence of the relief notch 44, the interior of the second portion 42 of the bearing support plate 40 defines an arcuate wall 421 with a third inner diameter that is greater than the first inner diameter of the bearing receiving portion 411 and the second inner diameter of the bearing stop 412. A plurality of ribs 422 protrude radially inward from the arcuate wall 421. Specifically, a plurality of reinforcing ribs 422 extend radially inward from the arc-shaped wall 421 of the second portion 42 and have one end in the axial direction abutting the bearing stopper 412 of the first portion 41.
In this embodiment, the relief notch 44 is generally fan-shaped, extends in a portion of the bearing support plate 40 in the axial direction, and connects the outer periphery of the annular structure of the bearing support plate with the central through hole, as shown in fig. 4. The relief notch 44 is defined in the circumferential direction by a first wall 441 and a second wall 442, and the first wall 441 and the second wall 442 may be substantially opposite in the circumferential direction of the annular structure of the bearing support plate 40 and extend substantially in the axial direction of the bearing support plate. The size of the scallops formed by the relief notches 44 varies depending on the size of the driven wheel, typically between 100 deg. and 110 deg.. In the installed state, the first wall 441 may preferably substantially define a vertical plane, or the first wall 441 may preferably extend substantially in a vertical direction.
According to the present invention, the first wall 441 defining the escape indentation 44 serves to collect and guide the flow of lubricating oil. Accordingly, the first wall 441 is preferably provided to have a large area. As shown in fig. 6, in this embodiment, the first wall 441 includes a first section 441-1 defined by the second portion 42 of the bearing support plate 40 and a second section 441-2 defined by one of the plurality of reinforcing bars. The first and second sections 441-1, 441-2 are continuous in the radial direction, the first and second sections 441-1, 441-2 constituting a radially inner section defining a first plane perpendicular to the circumferential direction.
In addition, to facilitate collection and guiding of the lubricating oil, the first wall 441 of the bearing support plate may further include a third section 441-3 continuous with and radially outward of the first section 441-1, the third section 441-3 constituting the radially outer section. The radially outer section is located radially outward of the radially inner section and defines a curved surface/plane that diverges from the first plane outward of the relief notch.
According to the present invention, a guide portion 45 protruding toward the central through hole is formed continuously with the first wall 441 defining the escape notch 44 in the radial inner portion of the annular bearing support plate 40, and the guide portion 45 serves to guide the lubricant flowing downward along the first wall 441 to a predetermined position, as explained in detail below.
In the embodiment shown in the drawings, the guide 45 is formed on the reinforcing rib 422 and the bearing stopper 412, and protrudes toward the central through hole. However, the position of the guide portion 45 in the axial direction may be changed according to a difference in the predetermined position. The guide 45 preferably extends radially inward beyond the bearing stop 412.
As shown in fig. 1, due to the coaxial configuration, an annular space is defined between the hollow rotor shaft 23 of the motor and the output shaft 33 of the differential 31. The inlet of this annular space is defined by the end 25 of the hollow rotor shaft 23 of the motor that extends into the reduction mechanism module. The guide portion 45 of the bearing support plate 40 is provided to protrude toward the inlet of the annular space so as to guide the lubricating oil flowing along the first wall 441 to the vicinity of the inlet of the annular space and into the annular space, thereby cooling the rotor shaft 23.
In this embodiment, since the hollow rotor shaft 23 of the motor extends into the bearing support plate 40, the guide 45 is provided on the reinforcing ribs 422 and the bearing stopper 412, see fig. 5 and 6. However, depending on the location of the entrance to the annular space, the guide may be provided on the stiffener 422 or the bearing stop 412.
In addition, as shown in fig. 5 and 6, the radially innermost end of the guide portion 45 may be formed with a flattened portion 451. If the radially innermost end of the guide portion 45 is formed as a sharp or rounded corner, the falling direction of a portion of the lubricating oil accumulated therein is random. The skived portion 451 allows the lubricant accumulated therein to drop in the vertical direction, thereby better controlling the falling position of the lubricant. It is noted that the flattened portion 451 is not limited to being formed by cutting, but may be formed by other means, for example, formed at the time of casting.
In this embodiment, the bearing support plate 40 further includes a connecting portion 443 defining the relief notch 44 in the axial direction, the connecting portion 443 extending in the circumferential direction and connecting the first wall 441 and the second wall 442.
In addition, as shown in fig. 2 to 4, a radial recess 46 adjacent to the guide portion 45 or the first wall 44 may be formed in the bearing stopper portion 412. The guide 45 may be formed in the bearing stopper 412 or in a transition of the bearing stopper 412 and the reinforcing rib 422. In some cases, the axial position of the inlet of the annular space may overlap with the axial position of the bearing stop 412. In order to let the lubricating oil flowing along the first wall 441 fall down towards the inlet of the annular space, a radial recess 46 may be formed in the bearing stop 412 in the region adjoining the first wall 441. Due to the presence of the radial recess 46, the lubricating oil flowing along the first wall 441 will flow into the radial recess 46 and be guided by the guide 45 to fall to the inlet of the annular space.
In addition to the radial recess 46 adjoining the first wall 441, a radial recess 47 adjoining the second wall 442 may be provided, which radial recess 47 serves for guiding lubricating oil to the bearing 34-2.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.

Claims (17)

1. A bearing support plate of a substantially annular structure having a central through hole, characterized in that the bearing support plate has a relief notch extending a portion of the bearing support plate in an axial direction, the relief notch connecting an outer periphery of the annular structure and the central through hole, the relief notch being defined in a circumferential direction by a first wall and a second wall, wherein the bearing support plate is formed with a guide portion continuous with the first wall protruding toward the central through hole.
2. Bearing support plate according to claim 1, characterized in that the bearing support plate comprises a first portion for providing a bearing seat and a second portion for fixing the bearing support plate, the first portion and the second portion being contiguous in axial direction.
3. Bearing support plate according to claim 1, characterized in that the first wall comprises at least a radially inner section and a radially outer section, the radially inner section being located radially inwards and defining a first plane perpendicular to the circumferential direction, the radially outer section being located radially outwards and defining a second plane/curved surface, the second plane/curved surface being offset from the first plane in a direction away from the relief gap.
4. The bearing support plate of claim 1 wherein the first wall and the second wall are circumferentially opposite.
5. The bearing support plate of claim 1 wherein the first wall and the second wall define an angle between 100 ° and 110 °.
6. The bearing support plate of claim 2 wherein the outer periphery of the second portion is formed with lugs with bolt holes.
7. The bearing support plate of claim 2, wherein the first portion for providing a bearing seat comprises a bearing receiver having a first inner diameter and a bearing stop having a second inner diameter smaller than the first inner diameter, wherein the guide extends radially inward beyond the bearing stop.
8. The bearing support plate of claim 7, wherein the bearing stop is formed with a first radial recess adjacent to the guide or the first wall in a region corresponding to the relief notch.
9. The bearing support plate of claim 8, wherein the bearing stop is formed with a second radial recess adjacent the second wall in a region corresponding to the relief notch.
10. Bearing support plate according to claim 7, characterized in that the second part further comprises a stiffener defining the first wall, which stiffener adjoins the bearing stop, and in that the guide is formed on the stiffener and/or the bearing stop.
11. The bearing support plate of claim 10, wherein a hollow interior for coupling to the second portion of the housing defines an arcuate wall with a third inner diameter greater than the first and second inner diameters due to the presence of the relief notch, the stiffener protruding radially inward from the arcuate wall.
12. Bearing support plate according to claim 1, characterized in that the radially innermost end of the guide portion is formed with a flattened portion.
13. A reduction mechanism comprising a hollow input shaft, a differential, and a transmission transmitting power of the hollow input shaft to the differential, wherein one of two half shafts of the differential extends through the hollow input shaft, characterized in that the reduction mechanism comprises a bearing support plate according to any one of claims 1 to 12 for a housing of the differential.
14. A reduction mechanism according to claim 13, wherein the transmission comprises two gears fixed on a layshaft parallel to the hollow input shaft, a first of the two gears meshing with teeth or gears on the hollow input shaft and a second of the two gears meshing with teeth or gears on the differential housing, wherein the first gear meshes with teeth or gears on the hollow input shaft in a relief notch of the bearing support plate.
15. The reduction mechanism according to claim 13, wherein the guide portion on the bearing support plate is formed at a position corresponding to an inlet of an annular space defined through half shafts of the hollow input shaft and the differential in an axial direction.
16. A reduction mechanism according to claim 13, wherein the bearing support plate is arranged such that the first wall extends in a generally vertical direction.
17. An electric drive for a motor vehicle, characterized in that the electric drive comprises an electric motor and a reduction mechanism according to any one of claims 13 to 16, wherein the hollow input shaft of the reduction mechanism is the hollow rotor shaft of the electric motor.
CN202111624205.3A 2021-12-28 2021-12-28 Bearing support plate, reduction gear and electric drive for a motor vehicle Pending CN116353316A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202111624205.3A CN116353316A (en) 2021-12-28 2021-12-28 Bearing support plate, reduction gear and electric drive for a motor vehicle
DE102022213905.4A DE102022213905A1 (en) 2021-12-28 2022-12-19 Bearing support plate, reduction mechanism and electric drive for a motor vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111624205.3A CN116353316A (en) 2021-12-28 2021-12-28 Bearing support plate, reduction gear and electric drive for a motor vehicle

Publications (1)

Publication Number Publication Date
CN116353316A true CN116353316A (en) 2023-06-30

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CN202111624205.3A Pending CN116353316A (en) 2021-12-28 2021-12-28 Bearing support plate, reduction gear and electric drive for a motor vehicle

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DE (1) DE102022213905A1 (en)

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