Clutch type chain wheel driving device

Abstract

The invention discloses a clutch type chain wheel driving device which comprises a wheel shaft, a side end disc, a chain wheel sleeve, an inner sleeve, an elastic washer and a poking button. Teeth arearranged on the side end disc; the inner sleeve is fixedly mounted on the wheel shaft; the elastic washer is fixedly mounted on the inner end surface of the inner sleeve; the poking button is movablysleeved on the wheel shaft and is arranged on the inner side of the elastic washer; the chain wheel sleeve is installed on the inner sleeve through a bearing, a chain wheel is arranged at one end ofthe outer side of the chain wheel sleeve, a circle of cylinder is arranged at one end of the inner side of the chain wheel sleeve, a guide groove channel matching poking teeth of the poking button isformed in the cylinder wall of the cylinder, and the poking teeth of the poking button are located in the guide groove channel. When a bicycle is ridden forwards, the chain drives the chain wheel sleeve to rotate forwards, the guide groove channel of the chain wheel sleeve can drive the poking button to rotate forwards, a protruding elastic piece on the elastic washer can drive the poking button to move towards the side end disc when the poking button rotates forwards, and then the poking button is meshed with teeth of the inner gear ring on the side end disc to drive the side end disc to rotate.

Description

technical field [0001] The invention belongs to the technical field of electric bicycles and bicycles, and in particular relates to a clutch type sprocket driving device. Background technique [0002] The existing electric bicycle rear wheel drive structure is that the motor wheel is installed on the rear wheel shaft, and the motor end plate of the motor wheel is provided with a threaded opening for installing the flywheel (i.e. the sprocket), and the flywheel is installed on the threaded opening by threads to realize the connection with the The motor wheel is fixedly installed, and there is a ring of teeth on the outer ring of the flywheel, so that the outer ring of the flywheel is linked with the crank wheel through a chain to realize chain transmission, and the inside of the flywheel adopts a ratchet pawl structure to ensure the one-way transmission of riding. There are following problems in a kind of flywheel transmission structure: [0003] 1. The flywheel always runs ...

AI Technical Summary

Problems solved by technology

[0003] 1. The flywheel always runs with the motor wheel, which greatly increases the working time of the flywheel. Since the flywheel has a ratchet and pawl structure to ensure the one-way transmission of riding, the ratchet and pawl structure inside the flywheel is prone to damage, resulting in lower service life

[0004] 2. After the flywheel has worked and aged for a long time, it is prone to crank rotation (when the motor wheel is running, due to the aging friction inside the flywheel, it may drive the outer ring of the flywheel to rotate, and then the outer ring of the flywheel drives the chain to rotate, and the chain drives the crank Follow-up), the crank follow-up will cause the power-assist sensor to send a power-assist signal to the controller. The controller mistakenly thinks that the customer uses the power-assist function, resulting in a speeding car, which brings hidden dangers to the travel safety of the customer.

[0005] 3. After the flywheel has been aging for a long time, when the motor wheel drives the flywheel to run, there will be a lot of noise

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