DRIVE UNIT AND ELECTRIC-ASSIST BICYCLE - PANASONIC IP MAN CO LTD

Title:

DRIVE UNIT AND ELECTRIC-ASSIST BICYCLE

Document Type and Number:

WIPO Patent Application WO/2017/010068

Kind Code:

A1

Abstract:

The purpose of the present invention is to reduce the load on a motor and a rider by performing a shifting operation in a favorable manner in a drive unit provided in an electric-assist bicycle. A drive unit (20) is equipped with a resultant force vehicle (29) capable of rotating as a result of the resultant force obtained by synthesizing a human-powered drive force and an auxiliary drive force, and further equipped with a shifting mechanism (17) that transmits drive force to the resultant force vehicle (29) and has a plurality of selectable gears. The shifting mechanism (17) is equipped with a high-speed clutch (55) capable of transmitting the drive force from a high-speed gear (41) to the resultant force vehicle (29), and a clutch switch (61) that moves according to the selected gear and is capable of engaging the high-speed clutch (55) and disengaging therefrom. Further provided are force-imparting mechanisms (61d, 61f, 61g) for imparting force to the high-speed clutch (55) from the clutch switch (61) in a manner such that the high-speed clutch (55) transitions from a state of connection to the resultant force vehicle (29) to a state of disconnection therefrom, when the clutch switch (61) contacts the high-speed clutch (55).

Inventors:

KAWAKAMI MASAFUMI

Application Number:

PCT/JP2016/003243

Publication Date:

January 19, 2017

Filing Date:

July 08, 2016

Export Citation:

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Assignee:

PANASONIC IP MAN CO LTD (JP)

International Classes:

B62M6/55; F16D41/12; F16D41/24

Domestic Patent References:

WO2015008314A1	2015-01-22
WO2016024300A1	2016-02-18
WO2015186159A1	2015-12-10

Foreign References:

JPH11240481A	1999-09-07
JP5202769B1	2013-06-05
JPH10250673A	1998-09-22

Other References: