SADDLE-TYPE ELECTRIC VEHICLE

• US 20200130498A1
• Filed: 10/28/2019
• Published: 04/30/2020
• Est. Priority Date: 10/30/2018
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company), M-Tec Co., Ltd. (Mitsubishi Electric Corporation)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company), M-Tec Co., Ltd. (Mitsubishi Electric Corporation)
• Inventors: Matsushima, Satoshi, Akita, Toshitaka, Irie, Takafumi, Mizuno, Kinya, Mitsukawa, Makoto, Yoshimi, Kunio, Murao, Masaya, Kasaya, Yoshiki, Nakazawa, Shinichiro, Deguchi, Kazuma
• Granted Patent: US 11,180,019 B2
• Time in Patent Office: Days
• CPC Class Codes: B60K 1/04 of the electric storage means for propulsion exchanging batteries for electric propulsion of vehicles B60L53/80; for auxiliary purposes only B60R16/04; supplying batteries to, or removing batteries from, vehicles B60S5/06
• CPC Class Codes: B60K 11/02 with liquid cooling
• CPC Class Codes: B60K 17/043 Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
• CPC Class Codes: B60K 2001/006 the electric motors
• CPC Class Codes: B60K 2007/0046 the motor moving together with the vehicle body, i.e. moving independently from the wheel axle
• CPC Class Codes: B60K 2007/0061 the motor axle being parallel to the wheel axle
• CPC Class Codes: B60K 7/0007 the motor being electric
• CPC Class Codes: B60L 2200/12 Bikes
• CPC Class Codes: B60L 50/50 using propulsion power supplied by batteries or fuel cells
• CPC Class Codes: B60Y 2200/12 Motorcycles, Trikes; Quads; Scooters
• CPC Class Codes: B60Y 2400/61 Arrangements of controllers for electric machines, e.g. inverters
• CPC Class Codes: B60Y 2410/10 Housings
• CPC Class Codes: B62K 2204/00 Adaptations for driving cycles by electric motor
• CPC Class Codes: H02K 1/20 with channels or ducts for flow of cooling medium
• CPC Class Codes: H02K 11/33 Drive circuits, e.g. power electronics H02K11/38 takes precedence
• CPC Class Codes: H02K 5/10 with arrangements for protection from ingress, e.g. water or fingers
• CPC Class Codes: H02K 5/15 Mounting arrangements for bearing-shields or end plates
• CPC Class Codes: H02K 5/203 specially adapted for liquids, e.g. cooling jackets
• CPC Class Codes: H02K 7/083 radially supporting the rotary shaft at both ends of the rotor H02K7/086, H02K7/09 take precedence
• CPC Class Codes: H02K 7/116 with gears
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries

Abstract

An electric bicycle includes a motor that includes a stator and a rotor and that is driven by a battery, a reduction gear, an output shaft configured to output power of the motor, a sprocket fixed to the output shaft, a housing, and a water jacket configured to cool the motor. The water jacket includes a flange section protruding outward in a radial direction of the stator, the flange section being formed in the water jacket at a side opposite to the reduction gear in a vehicle width direction.

Claims

1. A saddle-type electric vehicle comprising:

a motor that includes a stator and a rotor and that is driven by a power supply from a battery;

a reduction gear that is disposed on one side of the motor in a vehicle width direction and that is configured to reduce a speed of an output of the motor;

an output shaft that extends in the vehicle width direction and that is configured to output power of the motor in which the speed thereof has been reduced by the reduction gear;

a sprocket that is fixed to the output shaft and that is disposed on the other side of the motor in the vehicle width direction;

a housing having an accommodating space in which the stator and the rotor are accommodated; and

a water jacket that is disposed to surround the stator in the accommodating space and that is configured to cool the motor,

wherein the water jacket comprises a flange section protruding outward in a radial direction of the stator, the flange section being formed in the water jacket at a side opposite to the reduction gear in the vehicle width direction.

2. The saddle-type electric vehicle according to claim 1, wherein the housing comprises a first member and a second member,

the first member and the second member are fastened to each other while having the flange section sandwiched between the first member and the second member, and

a through-hole through which the output shaft is inserted is formed in the flange section.

3. The saddle-type electric vehicle according to claim 1, further comprising:

a bearing configured to rotatably support the output shaft with respect to the housing; and

gaskets interposed between the flange section and the housing,

wherein the bearing overlaps the gaskets between the output shaft and the stator when seen from the vehicle width direction.

4. The saddle-type electric vehicle according to claim 1, wherein a discharge port configured to discharge cooling water from the water jacket is formed in the housing, and

the discharge port is provided on a side surface of the other side of the housing in the vehicle width direction.

5. The saddle-type electric vehicle according to claim 1, wherein a flow path spirally extending around the stator is formed in the water jacket.

6. The saddle-type electric vehicle according to claim 1, further comprising an inverter configured to convert current supplied from the battery into alternating current and configured to supply the current to the motor,

wherein the inverter is disposed below the motor, and

cooling water supplied to the water jacket goes through the inverter.