Abstract: An in-wheel motor drive unit (11) includes: a motor portion (11A) that is placed on one side in the direction of the axis of the in-wheel motor drive unit; a wheel hub portion (11C) that is placed on the other side in the direction of the axis of the in-wheel motor drive unit; a speed reduction portion (11B) that is placed between the motor portion and the wheel hub portion and that reduces the speed of output rotation of the motor portion to transmit the resultant output rotation to the wheel hub portion; and a first arm portion (34) that is formed integrally with a speed reduction portion casing (33) forming the outer shape of the speed reduction portion, that projects in a direction perpendicular to the axis from the speed reduction portion casing, and that has its tip end pivotally coupled to a vehicle body-side member.

Abstract: A gear shaft of an output gear in a speed reducer of an in-wheel motor driving device is supported at a first end thereof and a second end thereof with respect to a housing. The gear shaft of the output gear is formed with a spline hole. The spline hole provides a spline-connection with an output shaft of a wheel hub.

Abstract: An object of the present invention is to prevent lubricant oil of a speed reduction unit from moving to an electric motor side and besides to prevent an eccentric load from acting on bearings supporting an input shaft. In a drive device for an electric vehicle including: a speed reduction unit including an input shaft driven by output of an electric motor; a hub unit rotationally driven by an output member of the speed reduction unit; and a housing accommodating the electric motor and the speed reduction unit, the configuration is made such that a partition for partitioning an accommodation section into respective accommodation spaces of the electric motor and the speed reduction unit is provided in the housing, and an oil seal member is placed between a peripheral edge portion of a center hole of the partition and a rotor support member the electric motor.

Abstract: An in-wheel motor drive unit (11) includes: a motor portion (11A) that is placed on one side in the direction of the axis of the in-wheel motor drive unit; a wheel hub portion (11C) that is placed on the other side in the direction of the axis of the in-wheel motor drive unit; a speed reduction portion (11B) that is placed between the motor portion and the wheel hub portion and that reduces the speed of output rotation of the motor portion to transmit the resultant output rotation to the wheel hub portion; and a first arm portion (34) that is formed integrally with a speed reduction portion casing (33) forming the outer shape of the speed reduction portion, that projects in a direction perpendicular to the axis from the speed reduction portion casing, and that has its tip end pivotally coupled to a vehicle body-side member.

Abstract: A drive device for an electric vehicle includes: a speed reduction unit including an input shaft driven by output of an electric motor; a hub unit rotationally driven by an output member of the speed reduction unit; and a housing accommodating the electric motor and the speed reduction unit. The drive device is provided with a power supply terminal box made up of: an accommodation recessed portion provided in a rear end surface of the housing; a power supply terminal provided inside the accommodation recessed portion; a communication hole in communication with the accommodation recessed portion and an interior of the housing; and a cover member for the accommodation recessed portion.

Abstract: A fixed type constant velocity universal joint includes an outer joint member, an inner joint member, a plurality of balls for transmitting torque provided between track grooves of the outer joint member and track grooves of the inner joint member, and a cage for retaining the balls. Grease is enclosed in the fixed type constant velocity universal joint which includes a thickener and a lubricant component which is constituted by base oil. The grease contains 90% by mass or more of paraffinic mineral oil with respect to the total mass of the lubricant component of the grease, and 3 to 8% by mass of the thickener with respect to the total mass of the components of the grease.

Abstract: An in-wheel motor drive assembly includes a motor case defining a motor chamber and a reduction mechanism chamber provided on one side of and isolated from the motor chamber by a partition wall. An electric motor is mounted in the motor chamber. A planetary gear reduction mechanism is mounted in the reduction mechanism chamber, and reduces the rotation of the electric motor and outputs the reduced rotation to a hub ring. The reduction mechanism is lubricated by lubricating oil stored in the reduction mechanism chamber. A tapered oil guide surface is formed at the center of the inner surface of the partition wall facing the reduction mechanism chamber. The oil guide surface guides lubricating oil splashed up by the rotating reduction mechanism and flowing down along the inner surface of the partition wall, onto the rotor shaft of the electric motor, thereby lubricating bearings mounted on the rotor shaft.

Abstract: A gear shaft of an output gear in a speed reducer B of an in-wheel motor driving device is supported at its two ends with respect to a housing. The double-end supported gear shaft of the output gear is formed with a spline hole. The spline hole provides spline-connection with an output shaft of the wheel hub C. This structure makes the gear shaft less likely to come out of alignment even if the output gear comes under a bending moment. Therefore, even if an external force such as a lateral force from a tire causes the output shaft of the wheel hub C to develop a shaft deflection, the deformation/displacement is absorbed by a gap between splines which connect the output shaft of the wheel hub C and the output gear with each other.

Abstract: An in-wheel motor drive assembly includes a motor case defining a motor chamber and a reduction mechanism chamber provided on one side of and isolated from the motor chamber by a partition wall. An electric motor is mounted in the motor chamber. A planetary gear reduction mechanism is mounted in the reduction mechanism chamber, and reduces the rotation of the electric motor and outputs the reduced rotation to a hub ring. The reduction mechanism is lubricated by lubricating oil stored in the reduction mechanism chamber. A tapered oil guide surface is formed at the center of the inner surface of the partition wall facing the reduction mechanism chamber. The oil guide surface guides lubricating oil splashed up by the rotating reduction mechanism and flowing down along the inner surface of the partition wall, onto the rotor shaft of the electric motor, thereby lubricating bearings mounted on the rotor shaft.

Abstract: An object of the present invention is to prevent lubricant oil of a speed reduction unit from moving to an electric motor side and besides to prevent an eccentric load from acting on bearings supporting an input shaft. In a drive device for an electric vehicle including: a speed reduction unit including an input shaft driven by output of an electric motor; a hub unit rotationally driven by an output member of the speed reduction unit; and a housing accommodating the electric motor and the speed reduction unit, the configuration is made such that a partition for partitioning an accommodation section into respective accommodation spaces of the electric motor and the speed reduction unit is provided in the housing, and an oil seal member is placed between a peripheral edge portion of a center hole of the partition and a rotor support member the electric motor.

Abstract: An object of the present invention is to achieve reduction in cost and size of power supply means for an electric motor by obviating the need of a power supply connector therefor as an independent part. In a drive device for an electric vehicle including: a speed reduction unit including an input shaft driven by output of an electric motor; a hub unit rotationally driven by an output member of the speed reduction unit; and a housing accommodating the electric motor and the speed reduction unit, there is provided with a power supply terminal box made up of: an accommodation recessed portion provided in a rear end surface of the housing; a power supply terminal provided inside the accommodation recessed portion; a communication hole in communication with the accommodation recessed portion and an interior of the housing; and a cover member of the accommodation recessed portion.

Abstract: An object of the present invention is to provide an in-wheel motor driving device which includes a highly adaptable suspension mounting portion, is light weighted, and has reduced drag friction at the time of steering operation. An in-wheel motor driving device comprises: a motor section A which rotates a motor-side rotation member; a speed reducer section B which reduces and transmits rotation of the motor-side rotation member to a wheel-side rotation member; and a wheel hub connected and fixed to the wheel-side rotation member. The above three elements are disposed in series from an inboard side to an outboard side of a vehicle, and suspension mounting brackets are fixed onto an outer surface of the speed reducer section's housing. Arms of a suspension are attached via the suspension mounting brackets.

Abstract: Provided is a fixed type constant velocity universal joint which can prevent stick slip from occurring due to lack of lubricity, and prevent abnormal noises from occurring at low temperatures, even during use in an extremely cold region.

Abstract: An electrophotographic liquid developer includes a carrier liquid and toner particles. The toner particles include a colorant and a resin component and are dispersed in the carrier liquid. The resin component includes a polyester resin as a main component. When 0.3 g of the liquid developer is dropped on a filter paper (which is defined in JIS P 3801) from a point of 10 mm height, the carrier liquid diffuses in the filter paper at a speed not lower than 1 mm/minute.

Abstract: A liquid recording material containing at least a carrier liquid, a resin, a coloring agent, and a reactive silicone material, an image transfer sheet for use with the liquid recording material, and a method of fixing images, using the liquid recording material, are disclosed.

Abstract: A recording liquid including a colorant and a carrier liquid including at least a poly-&agr;-olefin. The recording liquid can be used as a liquid developer, an inkjet ink, a printing ink, a marker ink, an electronic recording ink, or the like. An image forming method including the steps of applying a recording liquid on a liquid bearing member to form a layer of the recording liquid; and developing an electrostatic latent image born on an image bearing member by bringing the layer of the recording liquid into contact with the image bearing member to form a visual image on the image bearing member.

Abstract: A recording liquid including a colorant and a carrier liquid including at least one of a liquid paraffin and a linear silicone oil. The recording liquid is an inkjet ink, a printing ink, a marker ink, a stencil ink, an electronic recording ink, a non-aqueous paint, a liquid developer or the like. When the recording liquid is a non-aqueous paint or a liquid developer, the recording ink further includes a resin.

Abstract: A liquid recording material containing at least a carrier liquid, a resin, a coloring agent, and a reactive silicone material, an image transfer sheet for use with the liquid recording material, and a method of fixing images, using the liquid recording material, are disclosed.

Abstract: An electrophotographic liquid developer includes a carrier liquid and toner particles. The toner particles include a colorant and a resin component and are dispersed in the carrier liquid. The resin component includes a polyester resin as a main component. When 0.3 g of the liquid developer is dropped on a filter paper (which is defined in JIS P 3801) from a point of 10 mm height, the carrier liquid diffuses in the filter paper at a speed not lower than 1 mm/minute.

Abstract: A liquid recording material containing at least a carrier liquid, a resin, a coloring agent, and a reactive silicone material, an image transfer sheet for use with the liquid recording material, and a method of fixing images, using the liquid recording material, are disclosed.