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Instructions for Building and Repairing Motorized Bicycle Engine Kits Classic posts on building, repairing and modifications.

 
 
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  #1  
Old 06-17-2009, 10:45 PM
Creative Engineering Creative Engineering is offline
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Join Date: Sep 2008
Location: Clearwater, FL
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Default Animated view Motorized Bicycle Clutch Assembly and countershaft

This is a multi-part post.

It contains a series of animations that depict exactly what is inside the in-frame Chinese 2-stroke engines; as far as the clutch and countershaft are concerned.

At the bottom of each post there will be a still of the exploded assembly.

Some of the parts shown will appear slightly different, as these are parts that I make. The countershaft and clutch assembly are shown exactly as they come from the Chinese factory.

Jim

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Last edited by Creative Engineering; 06-18-2009 at 08:08 AM.
  #2  
Old 06-17-2009, 10:58 PM
Creative Engineering Creative Engineering is offline
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Join Date: Sep 2008
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Default re: Animated view Motorized Bicycle Clutch Assembly and countershaft

This animation shows the clutch components and the order of assembly. The final step in the animation depicts the Countershaft gear and hub assembly. The hub, and bearing race are pressed together to trap the gear. The I.D., (inside diameter), of the gear is actually the outer race for the bearings shown...The gear is hardened. If this press fit is not done correctly the inner race, (with ball bearings), will walk off of the hub...The bearings will fall out and the gear will no longer be supported about the hub concentrically.

Jim

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  #3  
Old 06-17-2009, 11:05 PM
Creative Engineering Creative Engineering is offline
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Default re: Animated view Motorized Bicycle Clutch Assembly and countershaft

This animation shows the components that make up the countershaft. For clarity the cases and countershaft are the only items shown.

The slide action that passes through the countershaft is very simple, and effective, by design.

Jim

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  #4  
Old 06-17-2009, 11:16 PM
Creative Engineering Creative Engineering is offline
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Join Date: Sep 2008
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Default re: Animated view Motorized Bicycle Clutch Assembly and countershaft

This final animation shows the "Action" of the clutch from the actuator to the right side.

It is a partial cut-away...If it ends up being too confusing I will redo it. I'm used to looking at this sort of stuff daily.

EDIT: You will notice from this animation that the total action of the assembly is only about .030" or .75mm.
This entire assembly less the clutch actuator is spinning at 900-1500 RPM while riding.

Jim

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Last edited by Creative Engineering; 06-17-2009 at 11:28 PM.
 

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