Abstract: An in-wheel driving device disposed in a car wheel includes a motor including a stator and a rotor; a transmission unit disposed adjacent to the motor, having an opening therein, and configured to receive rotation power from the rotor and rotate the car wheel; and a rigid shaft inserted into the opening to fix the motor to a car body.

Abstract: A device for driving a rear wheel of an electric vehicle is provided. In one embodiment, the rear wheel driving device includes a motor for supplying rotational power, a gear group connected to a rotor of the motor, a final gear connected to the gear group, an output shaft connected to the final gear and rotating, a hub installed on an outer circumferential surface of the output shaft using a nut, a wheel connected to the hub, an axle housing connected to the hub using a hub bearing, a motor cover protecting the motor and mounting an output shaft bearing, and a trailing arm connected to the axle housing using an axle housing bolt and configured to mount the motor from an exterior side to an interior side of a vehicle.

Abstract: This invention relates to a wheel driven mechanism for a vehicle such as a wheelchair, an electrical bicycle, or a motorcycle, especially to a vehicle which has a wheel driven by power but without using an independent electric motor. The wheel driven mechanism comprises a rotor, a plurality of permanent magnets, a stator, and a plurality of electromagnets. The rotor is divided into a first block and a second block, and the permanent magnets are disposed within the first block to reduce the weight and the cost of the wheel driven mechanism. Furthermore, the user can easily rotate the handwheel mechanism during power off.

Abstract: In an electric vehicle, a bearing supporting portion supporting another end of a motor shaft is provided in a reducer case and protrudes to a recessed portion while extending at a lateral side of the knuckle. The reducer case being part of a drive unit is partially housed in the recessed portion of a wheel. The drive unit can be located closer to a rear wheel by an amount corresponding to the housed portion. Accordingly, it is possible to dispose part of the drive unit inside the wheel and thereby suppress protruding of the drive unit to a small degree.

Abstract: The invention relates to a hub reduction gear (10) for a driving wheel (20) of a wheeled vehicle with a planetary gear unit, which has a sun gear (12) connectable to a drive shaft (38a, 38b), a carrier (14) for planet gears (16), which are in mesh with the sun gear (12), and a ring gear (18) being in mesh with the planet gears (16). The planet gear carrier (16) and the ring gear (18) are configured to be alternately connected to the driving wheels (20) of the vehicle and being alternately connectable to a body-fixed part (24). The invention also relates to a driveline for a multi shaft, wheel supported vehicle with a hub reduction gear (10) of planetary gear type at the driving wheels of the vehicle, wherein the planet gear carrier and the ring gear of the planetary gears on at least one side of the vehicle are configured to be alternately connected to the driving wheels of the vehicle and being alternately connectable to a body-fixed part of the vehicle.

Abstract: An axle support structure includes a drive source output shaft, an axle, a vehicle body-side member, a vehicle wheel bearing and a floating shaft. The drive source output shaft is configured to be rotated by a drive source. The axle is disposed coaxially with the drive source output shaft to rotate integrally with a vehicle wheel. The vehicle wheel bearing is coupled to the axle for rotatably supporting the axle on a vehicle body-side member. The floating shaft has a first linking part linked with the drive source output shaft with a degree of freedom in a non-rotational direction, and a second linking part linked with the axle with a degree of freedom in a non-rotational direction, such that power is transmitted from the drive source output shaft to the axle. The vehicle wheel bearing is disposed axially between the first and second linking parts.

Abstract: Provided is a swing arm device for an electric two- or three-wheeled vehicle that can be reduced in the number of components for a reduction in weight while being mounted compact in an electric vehicle for which a swing arm of an electric vehicle includes a battery and a charger. The swing arm device for an electric two- or three-wheeled vehicle to be fitted on an electric vehicle includes a swing arm (30) one end of which is coupled to a swing shaft and the other end of which supports a rear wheel (WR), an electric motor (M) placed at the other end side of the swing arm (30) and for driving the rear wheel (WR), and a battery (56) for supplying electric power to the electric motor (M), and a charger (200) for charging the battery (56) is incorporated in the swing arm (30).

Abstract: A method for controlling an electric vehicle drivetrain having least two drive units with wheels located on opposite axles are driven by respective drive units, includes in a first operating mode, the ratio of the torques provided by the drive units in each case for a given torque requirement is set taking into account the efficiency applicable to each drive unit under the given operating conditions, and in a second operating mode, the ratio of the torques provided by the drive units in each case for a given torque requirement is set independently of the efficiency applicable to each drive unit under the given operating conditions.

Abstract: In one exemplary embodiment of the invention a method for controlling a speed of an internal combustion engine includes shutting off fuel flow into a cylinder to reduce the speed of the internal combustion engine. The method also includes providing an electrical load to an alternator of the internal combustion engine, further reducing the speed of the internal combustion engine.

Abstract: “Bumper car” amusement rides are disclosed. An exemplary bumper car comprises a frame, a seat, multiple drive wheels, a motor controller, and at least one rider control. The seat is configured to hold and position at least one rider of the bumper car. The car is electrically powered from an internal and/or external power source. Each drive wheel comprises a respective hub motor that, when supplied with the electrical power from the source, rotates the respective drive wheel relative to the frame and propels the bumper car. The controller is connected to the source and to the hub motors. The controller is configured: (a) to limit a maximal current supplied by the source to the hub motors during a surge-current situation to a preset maximum, and (b) to ramp down the maximal current over a preset time interval during the surge-current situation. The at least one rider control is interconnected with the source and the hub motors and is configured to be manipulated by a rider for maneuvering the bumper car.

Abstract: An in-wheel motor system capable of maximizing the efficiency in using a wheel space by improving a mounting structure thereof, the in-wheel motor system installed at a wheel of a vehicle to transmit a rotational force including an axle installed at the wheel of the wheel and rotating together with the wheel, an in-wheel motor mounted inside the wheel and provided with a rotor and a stator that are used to generate a rotational force to drive the wheel, the rotor, and the stator disposed to face each other while having an accommodation space thereinbetween, a cycloid decelerator installed at a center of the in-wheel motor, and provided with an output shaft to transmit a rotational force at a reduced speed from the in-wheel motor to the axle and an input shaft that passes through the in-wheel motor and rotates together with the rotor, a disc installed at one end portion of the input shaft that protrudes by passing through the in-wheel motor, and a disc brake configured to provide a braking force by pressing th

Abstract: A mounting structure for an in-wheel motor system is provided. The mounting structure includes the in-wheel motor system installed in a wheel of the vehicle, and a torsion beam axle (TBA) assembly to fix the in-wheel motor system to a vehicle body, wherein a rear portion of a motor housing includes a step portion formed in a stepped manner to have a decreased diameter, and a ring-shaped fastening face vertically arranged from the step portion, and the TBA assembly includes a trailing arm provided with a through hole to surround the step portion of the motor housing, a mount integrated with the trailing arm to fix the trailing arm to a vehicle body, and a plurality of fastening bolts to fix the motor housing to the trailing arm, wherein, when the step portion is fitted and coupled into the through hole, the fastening face closely contacts the trailing arm.

Abstract: A wheel hub unit includes a wheel hub, a hydraulic motor and at least one bearing for supporting the wheel hub and the hydraulic motor. The wheel hub unit comprises a first seal for protecting the at least one bearing from hydraulic oil from the hydraulic motor.

Abstract: The present disclosure provides an in-wheel drive apparatus. The apparatus includes a motor housing open at one side thereof, a motor unit mounted within the motor housing, and a rear cover coupled at one side thereof to the motor housing to close the open side of the motor housing and coupled at the other side thereof to a trailing arm. The rear cover includes a planar section constituting an outer peripheral surface of the rear cover; and a cover recess connected to an inner peripheral surface of the planar section to be integrally formed with the planar section and depressed from the planar section towards the rotor to form a recess to which the trailing arm is coupled.

Abstract: An object of the invention is to always maintain an outer pin holder and a housing in a speed reducer section at their predetermined positions, to prevent damage to such components as revolving members, outer circumferential engagers, and motion conversion mechanism upon a large axial load due to turning or sudden acceleration/deceleration, etc., and to eliminate rattling noise caused by the housing and the outer pin holder. A casing immobilizing member which is fixed to an inner surface of a speed reducer section casing and a housing immobilizing member which is fixed to an outer surface of a speed reducer section housing are provided between the speed reducer section casing and the speed reducer section housing. The casing immobilizing member and the housing immobilizing member are bonded with each other via a rubber member.

Abstract: The invention relates to a system for motorizing a wheel (2), the system comprising a motor unit (4), a drive member (6) secured to the wheel (2) and a clutch device (7) connects the output shaft (8) of the motor unit (4) to the drive member (6). According to the invention, the motor unit (4) comprises an electric motor (11) and is carried by an un-sprung part of a suspension strut (3) of an aircraft so that the latter can be made to move along the ground.

Abstract: A steerable wheel assembly comprising a mounting bracket (1) incorporating a vertical pivot mounting (2) for attachment to the vehicle. A second bracket (6) has a first arm (7) carrying a road wheel and a second arm (8) generally upstanding from the first and linked at the upper end thereof to the mounting bracket by a parallelogram linkage (4,5). A spring and shock-absorber unit (9) is pivotally connected between the second bracket and the parallelogram linkage. Another aspect of the invention provides a vehicle suspension system comprising a mounting bracket (20) for attachment to a vehicle body or chassis, and a wheel-mounting arm (21) pivotally attached to the mounting bracket and having a wheel mounted thereon. A spring and shock-absorber unit (22) extends between the mounting bracket and the wheel-mounting arm, at least one end of the spring and shock-absorber unit being connected through a member (23) whose position is adjustable along the axis of the respective bracket or arm.

Abstract: A wheelchair of the mid-wheel drive type comprises a chassis frame (10), a pair of front link arms (30) and a pair of rear link arms. The link arms are pivotally connected to the chassis frame. Front caster wheels (32) and drive wheels (53) are fixed to the front link arms. Rear caster wheels (42) are fixed to the rear link arms. Each front link arm (30) is operatively connected to an adjacent rear link arm (40) by a respective coupling (70), which is arranged to transmit pivotal movement of one of the front (30) and rear (40) link arm to an opposite pivotal movement of the other of the front (30) and rear (40) link arm.

Abstract: Included are an elastic support mechanism (10) and a shock absorber (11) in a suspension (3) interposed between an in-wheel motor device (1) and a vehicle body structure (2). The elastic support mechanism (10) can change a modulus of elasticity and the shock absorber (11) can change a damping force. The provision is made of a resonance monitoring unit (21) to monitor whether or not a rotational speed of a motor (7) falls within a predetermined resonance frequency range. When the rotational speed of the motor (7) is determined as falling within the resonance frequency range, an elastic modulus control unit (22) changes the modulus of elasticity, and a damping force control unit (23) changes the damping force of the shock absorber (11).

Abstract: A drive system has a switched reluctance motor (SR motor) and a control system configured to determine an estimated total torque of SR motor as a function of the phase voltages and phase currents of the phases of the SR motor.

Abstract: Disclosed herein are a decelerator in which a first deceleration unit of a planet gear type is provided inside a second deceleration unit of a cycloid type so as to apply eccentric rotation force to the second deceleration unit, and a motor brake with the same. The decelerator restricts an increase in the axial thickness of a motor and achieves an effectively increased deceleration ratio, and the motor brake equipped with the decelerator restricts an increase of the overall length thereof due to the decelerator, achieving enhanced space utility.

Abstract: An electric vehicle includes an axle that is a hollow cylindrical shaft. A motor shaft is inserted into a hollow portion of the axle substantially coaxially with the axle. In this case, on one side of a wheel, a motor is connected to a base end of the motor shaft extending from one end of the axle. Also, on the other side of the wheel, a reduction mechanism is connected to a leading end of the motor shaft extending from the other end of the axle.

Abstract: The in-wheel motor of the present invention includes: a cylindrical coil body; a coil body support member fixed to a shaft; an outer yoke that is disposed on an outer circumferential side of the coil body, and is fixed to a wheel disk; a magnet fixed on an inner circumferential face of the outer yoke; an inner yoke that is disposed on an inner circumferential side of the coil body, and is disposed to face the coil body. The outer yoke and the inner yoke are fixed, and are rotatable around the shaft; and a caliper is provided on an inner circumferential side of the inner yoke.

Abstract: A motorized wheelchair includes a frame, a battery support assembly that supports a battery box and is connected to the frame, first and second power drive assemblies disposed on each lateral side of the wheelchair, first and second rear wheels driven by the power drive assemblies, and first and second castor wheels that are pivotally connected to said frame. The battery support assembly is pivotally connected to the frame by a first connecting arrangement, so that said battery support assembly can pivot around a first longitudinal axis. The battery support assembly is pivotally connected to the first connecting arrangement by a second connecting arrangement, so that the battery support assembly can pivot around a second lateral axis.

Abstract: A power generation system for wheeled objects comprises a generator mechanically coupled to one or more of the object's wheels to convert wheel rotational energy into electrical energy. The power generation system may comprise an electrical storage device configured to store the electrical power produced by the generator. Power from the generator and/or the electrical storage device can be used to provide power to other electrical systems in or on the object. In certain embodiments, the electrical storage device comprises a bank of high-capacity capacitors connected in series. Some embodiments use a control circuit, for example, to regulate the charging and discharging of the capacitor bank and to provide suitable voltages for other systems. The power generation system may be disposed within an object's wheel, such as a wheel of a shopping cart.

Abstract: A wheel is provided with a motor having a stator and a rotor and has with a fixed-side member supporting the stator and a rotative-side member receiving rotation transmitted from the rotor. The wheel is supported between a pair of arms with a wheel axle. An axle rotatively supports the rotor and the rotative-side member. An engaging part is provided for engagement with the fixed-side member to position the center of rotation of the rotative-side member with respect to the fixed-side member. The fixed-side member and the rotative-side member are integrated by engagement of the engaging part with the fixed-side member. This configuration allows the axle to be positioned with respect to the fixed-side member, such that the centers of holes in the axle and the fixed-side member for insertion of the wheel axle will be in alignment. The unit U is then incorporated in between the pair of arms.

Abstract: A motor drive apparatus of an electric forklift includes first and second torque command value generation units that individually generate a torque command value indicating torque of a corresponding traveling motor in response to a gap between a speed command value and a speed detection value; and first and second slip detectors that individually generate a slip ratio estimation value showing a slip state of a corresponding drive wheel based on the speed detection value and the torque command value. The slip detectors individually have a first arithmetic unit which generates an inertial force estimation value proportional to a differential value of the speed detection value of the corresponding traveling motor and a second arithmetic unit which generates the slip ratio estimation value in response to a relationship between the corresponding inertial force estimation value and the torque command value of the corresponding traveling motor.

Abstract: The invention provides an electrical wheel comprising a hub located along a center line, a rim being rotatable about the hub such that the center line forms axis of revolution, and an electrical unit arranged to provide torque between the hub and the rim. The rim forms a compartment with a sidewall extending between a circular bottom and an opening. The hub extends through a suspension located centrally in the circular bottom and terminates in a free end inside the compartment. The electrical unit is located in the compartment in continuation of the hub and fixed to the free end of the hub. The wheel comprises a transmission for transferring the torque from the electrical unit to the rim. The transmission is arranged in the compartment about the hub, and the transmission is located between the bottom and the electrical unit.

Abstract: An in-wheel motor drive device 21 includes: a motor portion A; a speed reduction portion B that reduces the speed of rotation of the motor portion A to output the rotation having the reduced speed to an output shaft 28; and a wheel hub 32 coupled to the output shaft 28. The speed reduction portion B has a cylindrical casing-side member 45 that extends from one axial end to the other axial end of the speed reduction portion and that has both one end and the other end formed integrally, the output shaft 28 that is inserted through an inner space region of the casing-side member, and two output-shaft bearings 38a, 38b that are respectively provided on an inner periphery at both ends 45f of the casing-side member to rotatably support the output shaft 28.

Abstract: An in-wheel motor drive assembly 21 includes: a motor unit A; a speed reduction unit B having an output shaft 28 reducing the rotational speed of the motor rotary shaft 35 and outputting the reduced rotation and a speed-reduction-unit casing 22b forming a contour, and disposed on one axial side of the motor unit A; a wheel hub bearing unit C having a wheel hub 32 fixedly coupled with the output shaft 28 and a wheel-hub-bearing outer ring 22c rotatably supporting the wheel hub 32, and disposed on one axial side of the speed reduction unit B; and coupling portions 63, 64 secured to at least one of the wheel-hub-bearing outer ring 22c and speed-reduction-unit casing 22b to couple with members of a vehicle body.

Abstract: A suspension for a vehicle is provided. The suspension includes, for example, a frame, at least one drive assembly and at least one caster pivot arm. The at least one drive assembly and the at least one caster pivot arm are pivotally connected to the frame at a common pivot axis such that the drive assembly and the front caster pivot arm are pivotable relative to one another.

Abstract: A drive unit for an electric bicycle, the drive unit including a motor configured to generate a rotary force to drive a wheel of the electric bicycle, a reduction gear unit provided with a plurality of gears to decelerate a rotary force generated from the motor, and a ring gear configured to output the rotary force which is decelerated by the reduction gear, wherein a rib is formed on at least one of two lateral sides of the ring gear.

Abstract: A brake arrangement for a vehicle comprising a braking system arranged to vary hydraulic or pneumatic brake pressure that is arranged to apply a pressure to a brake calliper; an electric motor arranged to generate a braking torque that is applied to a first wheel when the electric motor is placed in a braking mode of operation, wherein the electric motor is arranged to vary brake torque generated when the electric motor is in the braking mode dependent upon a predetermined operating condition of the braking system.

Abstract: A saddle riding type, electric vehicle includes a swing arm removably and vertically swingably supported on a vehicle body frame, and an electric motor, a battery for supplying the electric motor with electric power, and a control unit for controlling the electric motor. The electric motor, the battery, and the control unit are disposed on the swing arm. The swing arm integrally provides, forwardly of a rear wheel, a bulkhead for accommodating a battery in isolation from an electric motor and a control unit. The bulkhead has an opening portion that faces terminals disposed on the battery. A battery accommodating portion integrally provides a partition wall extending in a vehicle width direction to form a plurality of accommodating chambers with each containing one of a plurality of batteries. A stand disposed downwardly of the partition wall is supported rotatably on a bottom wall of the battery accommodating portion.

Abstract: A drive wheel and suspension for a vehicle for mounting on a steering post to provide both a steering capability and propulsion to the vehicle. The drive wheel and suspension provides a spring suspension for that wheel of the vehicle, as well as what is effectively vehicle body mounting of the propulsion system so as to minimize un-sprung weight and to provide a compact assembly to support a suitable aesthetic and protective fender over the drive wheel and suspension.

Abstract: Various embodiments of the invention provide a control framework for robots such that a robot can use all joints simultaneously to track motion capture data and maintain balance. Embodiments of the invention provide a framework enabling complex reference movements to be automatically tracked, for example reference movements derived from a motion capture data system.

Abstract: A support system for an exhaust aftertreatment system for a two-stroke locomotive diesel engine providing a secure mounting of certain components of the exhaust aftertreatment system to the locomotive structure while at the same time allowing for differential thermal expansion (and the resulting physical displacement) of the components. The support system further carries the physical mass of the components of the aftertreatment system while at the same time effectively isolating the aftertreatment system from external loads and forces caused by motions of the locomotive engine and the locomotive frame.

Abstract: A vehicle, such as a loader, is disclosed. The vehicle includes a cooling system having a pump that communicates coolant to heat-generating components to be cooled by the coolant.

Abstract: An autonomous modular wheel assembly includes at least one connector for connecting the wheel control assembly to a vehicle axle, one or more suspension arms that support the assembly with respect to the axle, an electric drive motor connected to a the vehicle wheel, a steering bearing, and a steering actuator. The electric drive motor and steering bearing control the operation of the vehicle wheel in response to commands received via the actuator. The connector has one or more electrical connection points for providing power and information to the wheel assembly. The robot wheel increases the vehicle steering range to up to 150 degrees and enables new vehicle drive modes. The traditional +/?30 degrees of front wheel steering are enabled, as well as at least three new drive modes: four wheel parallel and converse steering, spin on spot steering, and 90 degree sideways motion.

Abstract: An electric vehicle driving device 10 includes a first motor 11, a second motor 12, a first planetary gear mechanism 20, a second planetary gear mechanism 30, a clutch device 40, and a wheel bearing 50. The first planetary gear mechanism 20 is a planetary gear device of single pinion type. The second planetary gear mechanism 30 is a planetary gear device of double pinion type. The first motor 11 is connected to a first sun gear 21 and a second sun gear 31. The second motor 12 is connected to a first ring gear 24. The clutch device 40 is connected to a first carrier 23. A second carrier 33 is connected to the first ring gear 24. A second ring gear 34 is connected to the wheel bearing 50.

Abstract: Disclosed herein is a pool cleaning device including an internal drive assembly mounted outside the interior cavity of the device housing. The device including a pool cleaning vehicle, the vehicle including a housing defining a body shell and the body shell including an interior cavity and the pool cleaning vehicle including a drive assembly; and an internal drive assembly, the internal drive assembly including a motor assembly for engaging the vehicle drive assembly for propelling the vehicle, the motor assembly mounted outside the interior of the body shell.

Abstract: A drive unit for a carrier that includes a chassis with a drive wheel that is pivotable with an air spring in and out of contact with a surface over which the carrier is propelled. The air spring is in a pneumatic system including an air compressor which is connected to a processor in an electrical system. The compressor is programmed to provide a fair safe mode for the drive wheel, a runtime control for the air compressor and a battery voltage sensing circuit to shut down the electrical system during periods of inactivity.

Abstract: An in-the-wheel hub-less suspension system for use on a vehicle is disclosed. The suspension mechanism has at least two vertical guides; at least two mounting brackets to be affixed to diametrically opposing positions on the rim of the wheel to which the suspension system is to be attached; at least one shock absorber unit; and one spring for each vertical guide. Each of the vertical guides extends through one of the at least one shock absorber units, wherein the spring for each vertical guide is located underneath the at least one shock absorber unit and encloses the vertical guide; and wherein each end of each of the at least two vertical guides engages with the corresponding mounting bracket.

Abstract: A hub unit includes an electric machine adapted for driving a wheel. The hub unit includes at least two planetary gears coupled in series between the electric machine and a wheel hub, and a gear shifting device for connecting and disconnecting, respectively, one of the planetary gears from being drivingly connected to the electric machine.

Abstract: An electric vehicle capable of protecting a coupling portion between a wheel and an axle from disturbance. An electric vehicle includes an axle that is a hollow cylindrical shaft passing substantially coaxially through a wheel in a manner extending from both sides of the wheel. A motor shaft is inserted into a hollow portion of the axle substantially coaxially with the axle in a manner extending from both ends of the axle. In this case, a motor is connected to a base end of the motor shaft extending from one end of the axle. Between the wheel and the motor, there are provided a coupling portion for coupling between the one end of the axle and the wheel, and a labyrinth structure for sealing between the wheel and the motor in a manner surrounding the coupling portion.

Abstract: The in-wheel motor drive assembly 21 includes: a motor unit A; a wheel hub bearing unit having a tubular wheel hub 32, a cylindrical outer-ring-side member 22c surrounding the outer circumferential surface of the wheel hub, and a wheel hub bearing 33 disposed in an annular space formed between the outer circumferential surface of the wheel hub and the inner circumferential surface of the outer-ring-side member to rotatably support the wheel hub; and a speed reduction unit 101 being a speed reduction mechanism having an output shaft 28 extending in one direction and an input shaft 25 extending in the other direction and reducing the rotational speed of the input shaft and transmitting the reduced rotation to the output shaft, the output shaft being fixedly inserted in the center of the wheel hub 32 and the input shaft being fixedly inserted in the motor rotary shaft 35.

Abstract: A wheel assembly includes a tire and an electrical motor having a stator and a rotor. The wheel assembly also includes a rim that is encircled by the tire. At least one of the stator and rotor is directly exposed to the rim. Both the stator and the rotor are housed by the rim. The electrical motor is operable to drivingly rotate the rim and the tire.

Abstract: A mobile base for a camera crane includes a front left drive motor assembly, a front right drive motor assembly, a rear left drive motor assembly, and a rear right drive motor assembly, attached to a chassis. Each drive motor assembly may include an electric motor linked to an axle via a gear reduction and at least one wheel on the axle. A middle left drive motor assembly and a middle right drive motor assembly may each also include an electric motor linked to an axle via a gear reduction, at least one wheel on the axle, and a spring suspension assembly attached to the chassis and supporting the axle. An electrical power supply on the chassis may be linked to each of the electric motors.

Abstract: An axle tube comprising a dry section interposing a first wet section and a second wet section, the first and second wet sections housing a liquid lubricant, the dry section having an interior isolated from the liquid lubricant, at least one of the first and second wet sections includes a power train, and at least one of the first and second wet sections includes an electric motor, wherein the electric motor is at least partially received within the dry section, wherein a fluidic seal interposes the electric motor and the dry section, and wherein the electric motor is not rigidly mounted to the dry section.

Abstract: Disclosed is an in-wheel motor system including: an in-wheel motor mounted inside a wheel and generating a driving force; an oil pump provided adjacent to the in-wheel motor and supplying cooling oil into the in-wheel motor; and an oil tank provided under the in-wheel motor and collecting cooling oil discharged from the in-wheel motor, wherein the oil pump and the oil tank are arranged at a lower end of the in-wheel motor and between the in-wheel motor and a steering tie-rod in a longitudinal direction of a vehicle so as to be located at a more inner position than a knuckle in a widthwise direction of the vehicle. In the in-wheel motor system, the oil tank and the oil pump may be efficiently arranged to minimize the size of the oil tank and to improve the cooling performance.