Drive unit and electric assist bicycle
A drive unit and electric power assist technology, applied in bicycle accessories, bicycle gear transmission mechanism, rider drive, etc., can solve the problems of heavy load on the rider, lack of transmission mechanism, etc., and achieve the effect of reducing load
Active Publication Date: 2019-11-26
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0008] However, since the above-mentioned drive unit 215 does not include a speed change mechanism, there is a problem that an excessive load acts on the motor 202 or the rider of the bicycle when the electric assist bicycle travels on a steep uphill slope.
Method used
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Embodiment Construction
[0117] Hereinafter, an electric assist bicycle according to an embodiment of the present invention will be described based on the drawings. In addition, the left-right direction and the front-rear direction in the following description refer to the direction in the state in which the electrically-assisted bicycle 1 was boarded toward the traveling direction. In addition, the configuration of the present invention is not limited to the configuration described below.
[0118] figure 1 An electric assist bicycle according to an embodiment of the present invention is shown. Such as figure 1 As shown, this electric assist bicycle 1 includes a metal frame 2 composed of a head tube 2a, a front fork 2b, an upper tube 2c, a down tube 2g, a seat tube 2d, a chainstay 2e, a seat frame 2f, and the like. In addition, it includes a front wheel 3 rotatably attached to the lower end of the front fork 2b, a rear wheel 4 rotatably attached to the rear end of the chain stay 2e, a handle 5 fo...
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The present invention provides a drive unit, which is installed on an electric power-assisted bicycle, for the purpose of lightening the load on the motor or the rider by performing the shifting operation well. The drive unit (20) has a resultant force transmission body (29) that can rotate freely by the resultant force that synthesizes the human driving force and auxiliary driving force, and has a plurality of selectable gear stages and transmits the driving force to the resultant force transmission body (29). Agency (17). The speed change mechanism (17) is equipped with a high-speed clutch (55) that can transmit the driving force of the high-speed speed change gear (41) to the resultant force transmission body (29), and a high-speed clutch (55) that can be disengaged freely and according to the selected The shift stage moves the clutch switching body (61). A force application mechanism (61d, 61f, 61g) is provided to make the high-speed clutch (55) be connected to the resultant force transmission body (29) from the contact position when the clutch switching body (61) is in contact with the high-speed clutch (55). A force is applied from the clutch switching body (61) to the high-speed clutch (55) in such a manner that the posture becomes the disengaged posture.
Description
technical field [0001] The present invention relates to a drive unit and an electric assist bicycle equipped with the drive unit. Background technique [0002] There is known an electric power-assisted bicycle that has a motor powered by an accumulator such as a storage battery, detects the human-powered driving force constituted by the pedaling force applied to the pedals, and adds an auxiliary driving force of the motor corresponding to the human-powered driving force. (assist force), thereby enabling easy travel even when going uphill or the like. [0003] As the drive unit of the existing electric power assist bicycle, such as Figure 33 As shown, a human power drive system with a crankshaft 201 and a motor drive system in which the output of the motor 202 is increased or decreased according to the pedaling force applied to the crankshaft 201 are provided, and a cylindrical resultant shaft 203 is rotatably provided on the crankshaft 201. on the same axis (for example, r...
Claims
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IPC IPC(8): B62M6/55F16D41/12F16D41/24
CPCB62M6/55B62M11/06B62M25/08F16D41/26F16D41/30
Inventor 川上将史
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD