Abstract: The invention provides a drive device for electric vehicles which is small-sized, improved in heat radiating characteristics and adapted for use with a drive wheel of reduced diameter, and an electric wheelchair comprising the drive device. The drive device is provided on the inner periphery of each of left and right drive wheels (80), (80) of the electric vehicle and comprises a casing (30) supported at one end thereof by an axle (22) on the electric vehicle, a motor (40) housed in the casing (30) and having a rotating shaft (43) aligned with the axle (22), and a housing (50) rotatably fitted around the casing (30) and rotatable by the rotation of the motor (40). The drive wheel (80) is provided around the outer periphery of the housing (50) and rotatable therewith.

Abstract: Included are a rotor, and a stator having a yoke section and a teeth section including multiple teeth. The teeth section and the yoke section are made of mutually independent configuration members, and connected to each other. At least one of the teeth section and the yoke section is formed by connecting each neighboring two of its multiple segments arranged one after another in a direction in which the rotor rotates. At least some neighboring teeth out of the multiple teeth are unified.

Abstract: A drive device for electric vehicles comprises a casing 30, a motor 40 housed in the casing and having a rotating shaft 42, a housing 50 rotatably fitted around the casing and coupled to the outer end of the rotating shaft of the motor by a reduction gear mechanism 48, a drive wheel 80 provided around the housing and an electromagnetic brake 60 for arresting the rotation of the rotating shaft of the motor at the base end of the shaft. The rotating shaft of the motor is engaged with or disengaged from the electromagnetic brake by a clutch mechanism 70 provided between the shaft and the brake.

Abstract: A hub unit for use in electrically assisted bicycles is improved in an effect to cool a motor incorporated in the unit. The hub unit has a motor 9 comprising a stator 3 and a rotor 4, and a hub 7 enclosing the motor 9 therein and rotatingly drivable by the rotation of the rotor 4. The unit has a pump 8 for discharging air from inside the hub 7 with the rotation of the hub 7. The air is discharged from inside the hub 7 by the operation of the pump 8, whereby air is admitted into the hub 7 from outside through an air port 59 formed in the hub 7 and is supplied to the motor 9 to cool the motor 9 and reliably prevent the motor from overheating.

Abstract: A hub unit for use in electrically assisted bicycles has an improved effect to radiate heat from a stator. A hub (7) has inner teeth (66a) meshable with planetary gears (65) and a fixing support shaft (57) projecting from opposite ends of the hub and provided fixedly relative to a motor housing (5). The motor housing (5) has no cylindrical wall (8) covering the outer peripheral surface of the stator (3) but leaves the stator outer peripheral surface exposed to effectively release the heat generated by the windings of the stator.

Abstract: Included are a rotor, and a stator having a yoke section and a teeth section including multiple teeth. The teeth section and the yoke section are made of mutually independent configuration members, and connected to each other. At least one of the teeth section and the yoke section is formed by connecting each neighboring two of its multiple segments arranged one after another in a direction in which the rotor rotates. At least some neighboring teeth out of the multiple teeth are unified.

Abstract: A drive device for electric vehicles comprises a casing 30, a motor 40 housed in the casing and having a rotating shaft 42, a housing 50 rotatably fitted around the casing and coupled to the outer end of the rotating shaft of the motor by a reduction gear mechanism 48, a drive wheel 80 provided around the housing and an electromagnetic brake 60 for arresting the rotation of the rotating shaft of the motor at the base end of the shaft. The rotating shaft of the motor is engaged with or disengaged from the electromagnetic brake by a clutch mechanism 70 provided between the shaft and the brake.

Abstract: The invention provides a drive device for electric vehicles which is small-sized, improved in heat radiating characteristics and adapted for use with a drive wheel of reduced diameter, and an electric wheelchair comprising the drive device. The drive device is provided on the inner periphery of each of left and right drive wheels 80, 80 of the electric vehicle and comprises a casing 30 supported at one end thereof by an axle 22 on the electric vehicle, a motor 40 housed in the casing 30 and having a rotating shaft 43 aligned with the axle 22, and a housing 50 rotatably fitted around the casing 30 and rotatable by the rotation of the motor 40. The drive wheel 80 is provided around the outer periphery of the housing 50 and rotatable therewith.

Abstract: A hub unit for use in electrically assisted bicycles is improved in an effect to cool a motor incorporated in the unit. The hub unit has a motor 9 comprising a stator 3 and a rotor 4, and a hub 7 enclosing the motor 9 therein and rotatingly drivable by the rotation of the rotor 4. The unit has a pump 8 for discharging air from inside the hub 7 with the rotation of the hub 7. The air is discharged from inside the hub 7 by the operation of the pump 8, whereby air is admitted into the hub 7 from outside through an air port 59 formed in the hub 7 and is supplied to the motor 9 to cool the motor 9 and reliably prevent the motor from overheating.

Abstract: A hub unit wherein the axis is prevented from deflecting for use in electrically assisted bicycles. A single fixing support shaft (57) has opposite ends projecting outward respectively from opposite ends of a hub (7) enclosing a motor (9) and a planetary gear reduction mechanism (6) therein and having inner teeth (66a) in mesh with planetary gears (65). The rotor (4) of the motor (9) has a tubular rotating shaft (44) rotatably fitted around the support shaft (57) and is therefore rotatable free of deflection of its axis relative to the support shaft (57). The hub unit is more simplified in construction and easier to assemble than the conventional hub unit wherein the rotating shaft of the rotor (4) is separate from the support shaft (57).

Abstract: A hub unit for use in electrically assisted bicycles has an improved effect to radiate heat from a stator. A hub (7) has inner teeth (66a) meshable with planetary gears (65) and a fixing support shaft (57) projecting from opposite ends of the hub and provided fixedly relative to a motor housing (5). The motor housing (5) has no cylindrical wall (8) covering the outer peripheral surface of the stator (3) but leaves the stator outer peripheral surface exposed to effectively release the heat generated by the windings of the stator.

Abstract: A less heavy and small-sized assisted wheelchair that does not require so much manual labor of an assistant's handle operation. The wheelchair D comprises a frame assembly 1, casters 2 and 3, driving wheels 4 and 5, handrims 6 and 7, and a battery portion 11. In the inside of the casing 14 which covers the hub shaft 13 of the driving wheel 4, there are disposed a driving force detector 40 for detecting the human driving force applied to the handrim 6, a motor 21 for auxiliarily driving the driving wheel 4, and a controller 20 for controlling the motor 21 based on the result of the detection by the driving force detector 40. Also, on the upper rear portion of the frame assembly 1, there is disposed a driving force detector 50 for detecting the human driving force applied to the handles 8 and 9 by the assistant. The controller 20 controls and drives the motor 21 in accordance with the amount of human driving force of the assistant detected by the driving force detector 50.

Abstract: The control system of the present disclosure is particularly designed for use in the bicycle which is so designed as to change gears upon shifting of a chain guiding mechanism. The control system includes a motor driven reel, a flexible wire connected between the reel and the chain guiding mechanism and a switch arrangement for controlling the rotation of the reel. Upon turning on of the switch arrangement, the motor is rotated by a predetermined amount to perform a suitable shifting operation of the chain to engage with a required gear.