| 摘要 |
The present invention provides a traction device to be removably mounted on a motor vehicle tire including a . peripheral tire tread. The traction device comprises a frame, a sun gear journalled centrally of the frame, crank means connected to the sun gear for providing rotary movement to the sun gear and a plurality of claws mounted on the frame to engage the tire tread. At least one of the claws includes an arm slidable on the frame in a direction extending radially from the sun gear. A link member communicates with the sun gear and the arm to transmit linear radial movement to the arm in response to the crank means whereby the claws of the traction device can be adjusted to the circumference of the tire tread to securely engage the tire.
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