WO2003055712A1 - Electric motor with the rotor connected to the member that is to be rotated - Google Patents

Electric motor with the rotor connected to the member that is to be rotated Download PDF

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Publication number
WO2003055712A1
WO2003055712A1 PCT/IB2002/005636 IB0205636W WO03055712A1 WO 2003055712 A1 WO2003055712 A1 WO 2003055712A1 IB 0205636 W IB0205636 W IB 0205636W WO 03055712 A1 WO03055712 A1 WO 03055712A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
rotor
wheel
electric motor
vehicle
Prior art date
Application number
PCT/IB2002/005636
Other languages
French (fr)
Inventor
Sascha Mantovani
Original Assignee
Sascha Mantovani
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 Sascha Mantovani filed Critical Sascha Mantovani
Priority to AU2002353411A priority Critical patent/AU2002353411A1/en
Priority to EP02788436A priority patent/EP1461222B1/en
Priority to DE60203943T priority patent/DE60203943T2/en
Priority to US10/498,898 priority patent/US7105965B2/en
Priority to AT02788436T priority patent/ATE294076T1/en
Publication of WO2003055712A1 publication Critical patent/WO2003055712A1/en

Links

Classifications

    • 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
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
    • 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
    • B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
    • 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
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K2007/0046—Disposition of motor in, or adjacent to, traction wheel the motor moving together with the vehicle body, i.e. moving independently from the wheel 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
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K2007/0092—Disposition of motor in, or adjacent to, traction wheel the motor axle being coaxial to the wheel axle

Definitions

  • Electric motor with the rotor connected to the member that is to be rotated
  • the present invention relates to electric motors comprising a rotor and a stator both contained in a frame and using electrical energy to rotate a member connected to them.
  • the rotor of a motor of this type is integral with a coaxial shaft, to which it transmits the driving torque, and only one end of the shaft projects out of the frame.
  • the inventor of the present innovation has provided a solution to this problem by devising a motor which, while comprising the same essential parts (rotor, stator and frame) as electric motors of known type, can be mounted in a very much more advantageous way owing to the particular arrangement of its parts and their connections .
  • the electric motor according to the invention is characterized in that the rotor is connected in rotation to the said member, is hollow and its interior houses a shaft that acts as a support for the rotor, for the member and for the frame, the frame being connected by means of attachment to a structure that does not participate in the rotation of the said member .
  • Figure 1 is a view in longitudinal section of a preferred embodiment of the electric motor according to the invention connected to the hub of a wheel in the case in which a part of the rotor is directly fixed to the hub, while Figure 2 shows the case in which this part is connected to the hub via intermediate speed- reducing gearing, and Figure 3 shows a longitudinal section through a spindle powered by the electric motor of the invention.
  • the frame 3 is supported by a cylindrical shaft 5 via rolling bearings 10, 11.
  • a rod 6 which may also be provided with joints or damping elastic supports (not shown) and the rod in turn is fixed to a part of the frame of the vehicle (not shown) on which the motor is installed.
  • a stator 1 is made integral with the frame 3 by systems known to those skilled in the art, and its interior coaxially houses the stator 1, which is also of known type.
  • the rotor 2 which also includes a suitably shaped part 2c projecting from the frame 3 where it is fixed to the hub 4 of a wheel of the vehicle, which is therefore integral with the rotor 2 in rotation.
  • a support member 3a integral with the frame which may also be, as in the case depicted, a part of the frame 3 itself, so that the hub 4 can be clamped following interposition of the abovementioned rolling bears 10, 11 with suitable distance rings 17.
  • Another rolling bearing 12 (or more than one to reduce the radial thickness from the same load) is inserted lastly between the rotor 2 and the support member 3a to enable the rotor 2 to be supported without preventing its relative rotation.
  • the electric motor mounted on the shaft 5 which supports the member 3a and the frame 3 is compact and takes up very little space.
  • the shaft 5 coupled to the electric motor in the embodiments according to the invention functions also as a member that connects and distributes the load between the wheels of one axle, while the rotation is transmitted to the wheels directly by the motors connected to them, it being obvious that one electric motor according to the invention can be fitted for each wheel, that is at both ends of the shaft, resulting in great functionality and ease of assembly and operation.
  • Figure 2 shows a solution for those cases in which speed reduction is required between the motor and the wheel, that is to say that the wheel is to have a smaller angular velocity than the electric motor connected to it.
  • stator 1 and rotor 2 are installed as already described in the previous case, but the part 2c of the rotor 2 projecting from the frame 3 is not now shaped in such a way as to be fixed to the hub 4, but instead includes a first ring gear 8 that meshes with a gear wheel 13 pivoted on a spindle 16 integral with the hub 4, this gearwheel 13 meshing in turn with a second ring gear 9 formed on the frame 3.
  • Rotation of the said projecting part 2c of the rotor 2 and of its first ring gear 8 produces rotation of the gear wheel 13, which is connected to the hub 4, and its revolution about the shaft 5 along the second ring gear 9 with a speed of rotation equal to the speed of rotation of the rotor 2 divided by the ratio of the number of teeth of the second ring gear 9 to that of the first ring gear 8.
  • the speed of rotation of the hub 4 is equal to the said speed of revolution of the gearwheel 13, and is therefore the required amount less than that of the rotor 2.
  • FIG. 3 shows a spindle driven by an electric motor produced in accordance with the invention comprising a rotor 2' and a stator 1'.
  • This type of application shows very clearly the above- described advantages provided by the invention, such as in particular the small size of the electric motor, and hence of course of the spindle itself, the outer casing of which acts as a frame 3'.
  • the type of electric motor may be selected on the basis of the preferences of the designers, but the inventor suggests using an asynchronous motor supplied by a high-frequency converter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Massaging Devices (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Lock And Its Accessories (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

In an electric motor consisting of a rotor (2) and, coaxial therewith, a stator (1), both contained in a frame (3), the motor being capable of rotating a member (4) about an axis of rotation coinciding with the axes of the rotor (2) and stator (1), the rotor (2) is connected in rotation to the said member (4), is hollow and its interior houses a shaft (5) that supports both it (2) and the member (4), and the frame (3) of the motor is supported by the same shaft (5) and is connected by means of attachment (6) to a structure that does not participate in the rotation.

Description

Electric motor with the rotor connected to the member that is to be rotated
The present invention relates to electric motors comprising a rotor and a stator both contained in a frame and using electrical energy to rotate a member connected to them.
Usually (as in a motor-driven rotary pump), the rotor of a motor of this type is integral with a coaxial shaft, to which it transmits the driving torque, and only one end of the shaft projects out of the frame.
However, this type of motor has serious limitations in its modes of use owing to the fact that it has to be mounted in the way hinted at above.
To take one example, in self-propulsion the fact that the shaft driven by the electric motor projects from one side only makes it impossible to mount it directly on the axles of the drive wheels. A transmission system must therefore be used to transmit the rotation of the motor to the axles themselves.
This creates problems in terms of the manufacturing cost, space requirements, the inevitable energy losses and imprecision in the transmission of the drive.
The inventor of the present innovation has provided a solution to this problem by devising a motor which, while comprising the same essential parts (rotor, stator and frame) as electric motors of known type, can be mounted in a very much more advantageous way owing to the particular arrangement of its parts and their connections .
The electric motor according to the invention is characterized in that the rotor is connected in rotation to the said member, is hollow and its interior houses a shaft that acts as a support for the rotor, for the member and for the frame, the frame being connected by means of attachment to a structure that does not participate in the rotation of the said member .
Two preferred embodiments suitable for self-propulsion applications will now be described in more detail by way of example, no limitation or restriction therefore being implied, for which purpose reference will also be made to the accompanying drawings, in which:
Figure 1 is a view in longitudinal section of a preferred embodiment of the electric motor according to the invention connected to the hub of a wheel in the case in which a part of the rotor is directly fixed to the hub, while Figure 2 shows the case in which this part is connected to the hub via intermediate speed- reducing gearing, and Figure 3 shows a longitudinal section through a spindle powered by the electric motor of the invention.
Referring to Figure 1, it can be seen that' the frame 3 is supported by a cylindrical shaft 5 via rolling bearings 10, 11. To keep the frame 3 stationary, it is connected to a rod 6, which may also be provided with joints or damping elastic supports (not shown) and the rod in turn is fixed to a part of the frame of the vehicle (not shown) on which the motor is installed.
A stator 1 is made integral with the frame 3 by systems known to those skilled in the art, and its interior coaxially houses the stator 1, which is also of known type.
Mounted internally and also coaxially with the latter is the rotor 2, which also includes a suitably shaped part 2c projecting from the frame 3 where it is fixed to the hub 4 of a wheel of the vehicle, which is therefore integral with the rotor 2 in rotation. Lastly, situated coaxially even nearer the centre is a support member 3a integral with the frame which may also be, as in the case depicted, a part of the frame 3 itself, so that the hub 4 can be clamped following interposition of the abovementioned rolling bears 10, 11 with suitable distance rings 17.
Another rolling bearing 12 (or more than one to reduce the radial thickness from the same load) is inserted lastly between the rotor 2 and the support member 3a to enable the rotor 2 to be supported without preventing its relative rotation.
As can be seen in Figure 1, the electric motor mounted on the shaft 5 which supports the member 3a and the frame 3 is compact and takes up very little space.
The shaft 5 coupled to the electric motor in the embodiments according to the invention functions also as a member that connects and distributes the load between the wheels of one axle, while the rotation is transmitted to the wheels directly by the motors connected to them, it being obvious that one electric motor according to the invention can be fitted for each wheel, that is at both ends of the shaft, resulting in great functionality and ease of assembly and operation.
Figure 2 meanwhile shows a solution for those cases in which speed reduction is required between the motor and the wheel, that is to say that the wheel is to have a smaller angular velocity than the electric motor connected to it.
The frame 3, stator 1 and rotor 2 are installed as already described in the previous case, but the part 2c of the rotor 2 projecting from the frame 3 is not now shaped in such a way as to be fixed to the hub 4, but instead includes a first ring gear 8 that meshes with a gear wheel 13 pivoted on a spindle 16 integral with the hub 4, this gearwheel 13 meshing in turn with a second ring gear 9 formed on the frame 3.
Rotation of the said projecting part 2c of the rotor 2 and of its first ring gear 8 produces rotation of the gear wheel 13, which is connected to the hub 4, and its revolution about the shaft 5 along the second ring gear 9 with a speed of rotation equal to the speed of rotation of the rotor 2 divided by the ratio of the number of teeth of the second ring gear 9 to that of the first ring gear 8. With appropriate numbers of teeth, the speed of rotation of the hub 4 is equal to the said speed of revolution of the gearwheel 13, and is therefore the required amount less than that of the rotor 2.
Figure 3 meanwhile shows a spindle driven by an electric motor produced in accordance with the invention comprising a rotor 2' and a stator 1'. This type of application shows very clearly the above- described advantages provided by the invention, such as in particular the small size of the electric motor, and hence of course of the spindle itself, the outer casing of which acts as a frame 3'.
The type of electric motor may be selected on the basis of the preferences of the designers, but the inventor suggests using an asynchronous motor supplied by a high-frequency converter.
It will be obvious that the shape and relative disposition of the parts may be modified by a person skilled in the art depending on particular requirements, but the resulting embodiments, if derivable from the content of the appended claims, will still lie within the scope of protection conferred by the present patent application. The embodiments described above and illustrated must not therefore be regarded as compulsory or limiting.

Claims

Claims
1. Electric motor consisting of a stator and, coaxial therewith, a rotor, both contained in a frame integral with the stator, the motor being capable of rotating a member about an axis of rotation coinciding with the axes of the abovementioned rotor (2, 2') and stator (1, 1'), which motor is characterized in that the rotor (2, 2') is connected in rotation to the said member (4), is hollow and its interior houses a shaft (5) that acts as a support for the rotor ( 2 , 2 ' ) , for the member ( 4 ) and for the frame (3), the frame (3) being connected by means of attachment (6) to a structure that does not participate in the rotation of the said member (4).
2. Electric motor according to Claim 1, in which the member that is to be rotated is a part (4) integral in rotation with a wheel of a vehicle.
3. Electric motor according to Claim 2, in which the rotor (2) is integral with the said part (4) of a wheel of a vehicle and therefore rotates at the same speed as the said wheel.
4. Electric motor according to Claim 2, in which the rotor (2) is connected in rotation to the said part (4) of a wheel of the vehicle by a toothed member (13) pivoted on the said part (4) and meshing with teeth (8, 9 ) formed on the rotor ( 2 ) and on the frame ( 3 ) , respectively, which rotor (2) rotates at a speed different to that of the wheel.
5. Electric motor according to Claim 3, consisting of: a) a cylindrical shaft (5); b) an outer frame (3) coaxial with the shaft (5), by which it is supported by means of one or more rolling-friction bearings (10, 11); c) a connector rod (6), connecting the frame (3) to a part of the frame of the vehicle; d) a stator (1) keyed internally and coaxially to the frame ( 3 ) ; e) a rotor (2) coaxial with the stator (1) and comprising a part (2c) that is integral in rotation with a part (4) of a wheel of the vehicle; f) a support member (3a) interposed coaxially with the cylindrical shaft (5) between the frame and the hub (4) of the wheel of the vehicle; g) one or more rolling bearings (10, 11) interposed between the said shaft (5) and the said support member (3a); and h) one or more rolling bearings (12) arranged between the support member (3a) and the rotor (2).
6. Electric motor according to Claim 4, consisting of: a' a cylindrical shaft (5); b' an outer frame (3) coaxial with the shaft
(5), by which it is supported by means of one or more rolling-friction bearings (10, 11); a connector rod (6), connecting the frame (3) to a part of the frame of the vehicle; a stator (1) keyed internally and coaxially to the frame ( 3 ) ; a rotor (2) coaxial with the stator (1) and having a first ring gear (8) meshing with the teeth of a gear wheel (13) pivoted on a part
(4) of a wheel of the vehicle and meshing in turn also with a second ring gear (9) formed on the fixed frame (3);
£') a support member (3a) interposed coaxially with the shaft ( 5 ) between the frame ( 3 ) and the hub (4) of the wheel of the vehicle; g') one or more rolling bearings (10, 11) interposed between the said shaft (5) and the said support member (3a); and h') one or more rolling bearings (14, 15) inter- posed between the rotor (2) and the support member (3a) .
7. Electric motor according to any one of Claims 2 to 6, in which the member that is to be rotated is the hub (4) of a wheel of a vehicle.
8. Electric motor according to any one of the preceding claims, characterized in that it is of asynchronous type supplied at high frequency.
PCT/IB2002/005636 2002-01-04 2002-12-27 Electric motor with the rotor connected to the member that is to be rotated WO2003055712A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AU2002353411A AU2002353411A1 (en) 2002-01-04 2002-12-27 Electric motor with the rotor connected to the member that is to be rotated
EP02788436A EP1461222B1 (en) 2002-01-04 2002-12-27 Electric motor with the rotor connected to the member that is to be rotated
DE60203943T DE60203943T2 (en) 2002-01-04 2002-12-27 ELECTRIC ENGINE WITH ROTOR COUPLED TO THE ITEM TO BE TURNED
US10/498,898 US7105965B2 (en) 2002-01-04 2002-12-27 Electric motor with the rotor connected to the member that is to be rotated
AT02788436T ATE294076T1 (en) 2002-01-04 2002-12-27 ELECTRIC MOTOR WITH ROTOR COUPLED TO THE ELEMENT TO BE ROTATED

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH20020015/02 2002-01-04
CH152002 2002-01-04

Publications (1)

Publication Number Publication Date
WO2003055712A1 true WO2003055712A1 (en) 2003-07-10

Family

ID=4212345

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2002/005636 WO2003055712A1 (en) 2002-01-04 2002-12-27 Electric motor with the rotor connected to the member that is to be rotated

Country Status (6)

Country Link
US (1) US7105965B2 (en)
EP (1) EP1461222B1 (en)
AT (1) ATE294076T1 (en)
AU (1) AU2002353411A1 (en)
DE (1) DE60203943T2 (en)
WO (1) WO2003055712A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005048435A1 (en) * 2003-11-13 2005-05-26 Sew-Eurodrive Gmbh & Co. Kg Compact drive
US7817193B2 (en) * 2004-11-25 2010-10-19 Sony Corporation Image pickup apparatus and image pickup method to display or record images picked up at high rate in real time
KR20070108863A (en) * 2005-01-13 2007-11-13 더 팀켄 컴퍼니 High reduction ratio electric hub drive
US7594626B2 (en) * 2006-06-08 2009-09-29 Rod F. Soderberg Magnetically induced aircraft landing wheel rotation
US20110139523A1 (en) * 2009-12-14 2011-06-16 Chen ze-chun In-wheel motor structure
WO2011118036A1 (en) * 2010-03-26 2011-09-29 本田技研工業株式会社 Vehicle provided with a driving motor
DE102010035084A1 (en) * 2010-08-21 2012-02-23 Audi Ag Electric damper for a motor vehicle
KR20140014847A (en) * 2012-07-26 2014-02-06 삼성테크윈 주식회사 In-wheel driving device easy to repair motor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0492290A1 (en) * 1990-12-21 1992-07-01 FIAT AUTO S.p.A. Driving wheel unit for an electric traction vehicle
US5382854A (en) * 1992-07-29 1995-01-17 Kabushikikaisha Equos Research Electrical motor drive apparatus with planetary gearing
EP0883229A1 (en) * 1997-06-06 1998-12-09 ABB Daimler-Benz Transportation (Technology) GmbH Converter-fed driving system
DE19732637A1 (en) * 1997-07-29 1999-02-04 Daimler Benz Ag Electric drive for commercial vehicle wheel hub

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2505770A (en) * 1945-12-07 1950-05-02 Herbert G Hill Drive for airplane wheels
US3462626A (en) * 1966-12-30 1969-08-19 Hughes Aircraft Co Torque transferring arrangement
FR2679842A1 (en) * 1991-07-29 1993-02-05 Shm Management Services Ag MOTOR BEARING MODULE, IN PARTICULAR FOR MOTOR VEHICLE.
US5450915A (en) * 1993-12-20 1995-09-19 Li; I-Ho Electric motor-in-wheel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0492290A1 (en) * 1990-12-21 1992-07-01 FIAT AUTO S.p.A. Driving wheel unit for an electric traction vehicle
US5382854A (en) * 1992-07-29 1995-01-17 Kabushikikaisha Equos Research Electrical motor drive apparatus with planetary gearing
EP0883229A1 (en) * 1997-06-06 1998-12-09 ABB Daimler-Benz Transportation (Technology) GmbH Converter-fed driving system
DE19732637A1 (en) * 1997-07-29 1999-02-04 Daimler Benz Ag Electric drive for commercial vehicle wheel hub

Also Published As

Publication number Publication date
DE60203943T2 (en) 2006-02-16
US20050104472A1 (en) 2005-05-19
DE60203943D1 (en) 2005-06-02
AU2002353411A1 (en) 2003-07-15
US7105965B2 (en) 2006-09-12
ATE294076T1 (en) 2005-05-15
EP1461222B1 (en) 2005-04-27
EP1461222A1 (en) 2004-09-29

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