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EP0408074A1
Expired / Lapsed
EP
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Electric motor driving vehicle and power unit thereof
Assignee: Honda Motor Co Ltd
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Filing: 1990-07-13
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Granted: —
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Expires: 2010-07-13
Abstract
Abstract The invention relates to an electric motor driving vehicle having a driving unit (1) assembled with the motor (30) and the transmission mechanism (31), in order to avoid a load to a low rotational state of the motor (30), the transmission mechanism (31) is connected to the motor side and the driving wheel side within the range of a predetermined rotational number that the motor gets into the vicinity of maximum efficiency. According to this, motor driving is possible from starting, and because of small electric power and low heat generating quantity the cruising distance is extended, and the apparatus is made to be compact and of light weight. For this transmission, there are provided an automatic starting clutch (78, 85) and an automatic transmission (31), and when a belt type stepless speed change transmission is used as automatic transmission, maximum efficiency of the motor (30) or the vicinity state of the motor can always be maintained in the usual speed change range.
Inventors
- 👤 Toshio 3-2-15-203 Niiza Yamagiwa
- 👤 Takashi Ohzeki
- 👤 Hideaki Suzuki
- 👤 Hiroshi 3-19-501 Fujimi Uruno
- 👤 Kawashima Yoshinori
- 👤 Shoji 1171-109 Yamamuro 1-Chome Motodate
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 15:03
CPC Classifications
B; B62; B62K; B62K11/00; B62K11/02; B62K11/04; B62M; B62M7/00; B62M7/12; F; F16; F16H; F16H55/00; F16H55/32; F16H55/52; F16H55/56; F16H55/563; F16H9/00; F16H9/02; F16H9/04; F16H9/12; F16H9/16; F16H9/18; B62K2202/00; B62K2204/00; F16H57/00; F16H57/04; F16H57/048; F16H57/0487; F16H57/0489
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
64 words
Electric motor driving vehicle which runs by transmitting the rotation of a motor (30) to a driving wheel (13) through a transmission mechanism (31) which is characterized in that said transmission mechanism (31) is coupled to the driving wheel (13) only within the range of a predetermined rotational number (rpm) that said motor (30) gets into the vicinity of maximum efficiency (η max ).
Claim 2
Dependent Claim
64 words
Electric motor driving vehicle which runs by transmitting the rotation of a motor (30) to a driving wheel (13) through a transmission mechanism (31) which is characterized in that said transmission mechanism (31) is coupled to the driving wheel (13) only within the range of a predetermined rotational number (rpm) that said motor (30) gets into the vicinity of maximum efficiency (η max ).
Claim 3
Dependent Claim
28 words
Electric motor driving vehicle according to claim 1, which is characterized in that said transmission mechanism (30) comprises at least one automatic centrifugal force clutch (78, 85; 133).
Claim 4
Dependent Claim
56 words
Electric motor driving vehicle according to claim 1 or 2 which is characterized in that said transmission mechanism (31) is an automatic transmission (31), and said automatic transmission (31) changes speed at a state for maintaining a range (W) of a predetermined rotational number (rpm) that the motor (30) gets into the vicinity of maximum efficiency.
Claim 5
Dependent Claim
68 words
Electric motor driving vehicle according to claim 3, which is characterized in that said automatic transmission (31) includes two ratios of maximum and minimum (Fig. 11 II) which maintain a proper rotational number (rpm) of the motor (30) that the motor (30) becomes maximum efficiency (η max ) in the time of 100 % condition of duty factor (Fig. 12) at between these two ratios (Fig. 11 II).
Claim 6
Dependent Claim
78 words
Electric motor driving vehicle according to claim 3 which is characterized in that said automatic transmission (31) includes two ratios of maximum and minimum (Fig. 11 II), and the duty factor (Fig. 12) of usual transmission is established at a predetermined value of less than 100 % so as to be obtained with excessive output power (W) corresponding to at least an increment amount (α) of running resistance (Fig. 11 II) at a maximum ratio (Fig. 11 II).
Claim 7
Dependent Claim
87 words
Power unit for electric motor driving vehicle in which a driving wheel (13) is rotatably supported (at 14) to a transmission case (28) pivotally fixed to the vehicle body (3) to be able to oscillate, and a belt type stepless speed change transmission (31) provided by connecting the driving wheel (13) within said transmission case (28) and a motor (30) comprised within a motor housing (27) provided at a side portion of the transmission case (28) are connected, whereby said driving wheel (13) is driven by rotating.
Claim 8
Dependent Claim
87 words
Power unit for electric motor driving vehicle in which a driving wheel (13) is rotatably supported (at 14) to a transmission case (28) pivotally fixed to the vehicle body (3) to be able to oscillate, and a belt type stepless speed change transmission (31) provided by connecting the driving wheel (13) within said transmission case (28) and a motor (30) comprised within a motor housing (27) provided at a side portion of the transmission case (28) are connected, whereby said driving wheel (13) is driven by rotating.
Claim 9
Dependent Claim
34 words
Power unit for electric motor driving vehicle according to claim 6 wherein the entire transmission case (28) is comprised within a recess (135) formed at the external side surface of the driving wheel (13).
Claim 10
Dependent Claim
26 words
Power unit for electric motor driving vehicle according to claim 6 or 7 wherein said motor housing (27) and the transmission case (28) are integrally structured.
Claim 11
Dependent Claim
53 words
Power unit for electric motor driving vehicle according to any of the claims 6 to 8 which is characterized in that an electric power supply cord (47) of the motor (30) is fixed to a member side (35) for covering an opening portion to be fixed from sideward of the motor housing (27).
Claim 12
Dependent Claim
60 words
Power unit for electric motor driving vehicle according to any of the claims 6 to 9 wherein a communicating port (49) is provided at a boundary of the motor housing (27) and the transmission case (28), and the motor (30) and the belt type stepless speed change transmission (31) are cooled by at least one common cooling fan (53, 74).
Claim 13
Dependent Claim
35 words
Power unit for electric motor driving vehicle according to claim 10, wherein at least one cooling fan (53, 74) is provided at a driving pulley (66) of the belt type stepless speed change transmission (31).
Claim 14
Dependent Claim
43 words
Power unit for electric motor driving vehicle according to claim 10 or 11, wherein a cooling fan (53) is located adjoining to the communicating port (49) within the motor housing (27), and being mounted to a rotary shaft (50) of the motor (30).
Claim 15
Dependent Claim
70 words
Power unit for electric motor driving vehicle according to any of the claims 6 to 12 wherein a duct (44) having one end in communication with the interior of the motor housing (27) at the opposite side of the transmission case (28) and having another end opening to an interior space (19) of the vehicle body (3) which feeds cooling air forcibly to the interior of the motor housing (27).
Claim 16
Dependent Claim
28 words
Power unit for electric motor driving vehicle according to claim 13, wherein the electric power supply cord (47) of the motor (30) is arranged within the duct (44).
Claim 17
Dependent Claim
46 words
Power unit for electric motor driving vehicle according to any of the claims 8 to 14, wherein the electric power supply cord (47) of the motor (30) is directly drawn out of the motor housing (27) to its exterior without passing through the transmission case (28).
References Cited (Backward Citations)
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