Bicycle driving device
A technology for driving devices and bicycles, which is applied to bicycles, transmission devices, electrical devices, etc., and can solve problems such as difficult miniaturization
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no. 1 approach
[0036] figure 1 It is a side view of an electric assist bicycle (hereinafter referred to as "bicycle 10") equipped with a bicycle driving device 30 . In one example, a bicycle 10 includes a crank 12 , a pair of pedals 14 , a front sprocket 16 , a rear sprocket 18 , and a chain 20 . Crank 12 includes a pair of crank arms 22 and a crank axle 32 .
[0037] The pair of crank arms 22 are respectively coupled to both ends of the crank shaft 32 in a state capable of integrally rotating with the crank shaft 32 . The pedal 14 includes a pedal body 14A and a pedal shaft 14B. The pedal shaft 14B is connected to the crank arm 22 in a state where it can rotate integrally with the crank arm 22 . The pedal main body 14A is supported by the pedal shaft 14B in a rotatable state with respect to the pedal shaft 14B.
[0038] The front sprocket 16 and the output part 34 of the bicycle driving device 30 (refer to figure 2 )link. The rear sprocket 18 is connected to a drive wheel (not shown)...
no. 2 approach
[0067] refer to image 3 , the bicycle driving device 30A of the second embodiment will be described. The same reference numerals as those in the first embodiment are used for the parts common to the first embodiment, and description thereof will be omitted.
[0068] The bicycle drive device 30A of this embodiment includes a first planetary mechanism 74 , a first motor 38 , a second motor 40 , and a reduction mechanism 42 . In one example, the bicycle drive device 30A further includes the crankshaft 32 , the output unit 34 , the casing 44 , the control unit 46 , and the switching mechanism 88 .
[0069] The first planetary mechanism 74 is a planetary gear mechanism. The first planetary mechanism 74 includes a first input body 76 , a first output body 80 and a first transfer body 78 . The rotation of the crankshaft 32 is input to the first input body 76 . The first transfer body 78 is formed in a ring shape.
[0070] The first input body 76 includes a plurality of first pl...
no. 3 approach
[0078] refer to Figure 4 , the bicycle driving device 30B of the third embodiment will be described. For parts common to the first embodiment, the same reference numerals as those in the first embodiment are used, and descriptions thereof are omitted.
[0079] The bicycle drive device 30B of the present embodiment includes a first planetary mechanism 136 , a first motor 38 , a second motor 40 , and a reduction mechanism 142 . In one example, the bicycle drive device 30B further includes a crankshaft 32 , an output unit 34 , a casing 44 , and a control unit 46 .
[0080] The first planetary mechanism 136 includes a first input body 48 , a first output body 90 and a first transfer body 52 . The first output body 90 rotates corresponding to the rotation of the first input body 48 . The first output body 90 includes a plurality of first planet gears 92 , a plurality of first planet pins 56 and a first gear carrier 58 . The first planetary gear 92 is arranged between the first...
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