A device for forming tooth form of sprocket gear for power transmission apparatus of cahinless bicycle

A power transmission and bicycle technology, applied in the field of gear-shaped devices, can solve the problems of inability to guarantee durability, increase in volume and weight, inability to overcome precision machining, machining efficiency and productivity limitations, etc.

CN100396399CInactive Publication Date: 2008-06-25BIKEVALLEY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2008-06-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention discloses a device for forming a tooth form of a sprocket gear for the power transmission apparatus fore a chainless bicycle. The device for forming a tooth form comprises a first and second main driving motor operated by the operation of an operating switch according to information set in a control unit, a first gear unit rotated by the first main driving motor, a second gear unit rotated by the second main driving motor, a tooth forming unit of crown sprocket gear including a first end mill machining unit mounted in the first gear unit, and a tooth forming of flat sprocket gear including a second end mill mounted in the second gear unit. A working object to be machined to a crown or flat sprocket gear is attached too the tooth forming unit of crown or flat sprocket gear such that the respective tooth is machined by the first or second end mill.
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Description

technical field

[0001] The present invention relates to an apparatus for forming the tooth profile of a sprocket in a chainless bicycle power transmission device. More specifically, the present invention relates to a device in which a crown sprocket or flat sprocket is machined so as to be in gear mesh with a pin gear to transmit drive to the rear wheel of a chainless bicycle for silent and precise surface contact for gear meshing. Background technique

[0002] Generally, a bicycle includes a vehicle frame, pedals rotatably mounted on the vehicle frame for generating driving force by the bicycle rider's feet, front and rear wheels freely rotatably fixed to the front and rear of the vehicle frame, and A power transmission element that transmits the driving force generated by the rotation of the pedals to the rear wheels.

[0003] In the structure of this bicycle, the power transmission member of the bicycle includes a driving sprocket fixed on the pedal side, a driven sproc...

Examples

Embodiment Construction

[0034] Preferred embodiments according to the present invention will be specifically described below with reference to the corresponding drawings.

[0035] Figure 5 A device for forming the tooth profile of a sprocket in a chainless bicycle power transmission device according to an embodiment of the present invention is shown, wherein the device of the present invention is indicated by reference numeral 80 . Figure 6 An embodiment of a gear mesh between a pin gear and a face sprocket machined according to the invention is shown.

[0036] The device 80 for forming the tooth profile of a sprocket in a chainless bicycle power transmission device comprises first and second main drive motors 82, 84, a first gear unit 86, a second gear unit 88, a tooth forming unit of a crown sprocket 90 and the tooth forming unit 92 of the plane sprocket.

[0037] The first and second main drive motors 82 , 84 are spaced and electrically connected to each other within the base frame 98 and coop...