Sunday, March 23, 2008
Below is a mechanical toy based on a CAM mechanism. As the handle on the eccentric cam is turned the top part of the egg shell lifts to reveal a face. The basic construction of the toy is also shown below. The flat follower moves upwards and downwards as the cam rotates. Although the design is simple it must be made accurately or the mechanism will stick.
A drop cam has been used on the toy below. The movement is different compared to the smooth motion of the eccentric cam. As the cam rotates the top half of the shell lifts at a relatively constant speed and then drops down suddenly.
A drop cam has been used on the toy below. The movement is different compared to the smooth motion of the eccentric cam. As the cam rotates the top half of the shell lifts at a relatively constant speed and then drops down suddenly.
Saturday, March 08, 2008
When one part of the whole mechanical toy is turned, it will cause the others to be turned too, examples like ...
The cam is attached to the leg of the footballer, when the handle is been turned, the leg of the footballer will go up and down, and the football will be kicked.
When the long wooden thing is been pushed to the left or right, the person will follow suit.
When the handle is turned, the cam inside will turn too, causing the ship to go up and down.
There a wide range of cams used in mechanical toys, there are some simples cams that is used, in this 3 pictures below.
Where there are also some complicated ones...
When the cam is turned, the cams below will make circular movements, causing the cams on top to turn right & left.
