Patent ID: 9404522
Filing Date: 2016-08-02
CPC Classification: B25B,B60B,B60C,B66F,F16B,F16L

Claim Text:
1. An auxiliary wheel comprising a hub, a tire and at least one first locking assembly fixedly arranged on the hub, wherein, the first locking assembly is used to fix coaxially the auxiliary wheel onto a hub of a vehicle wheel by means of at least one through hole in the hub of the vehicle wheel or the first locking assembly is used to connect with a second locking assembly on the hub of the vehicle wheel, so that the auxiliary wheel is coaxially driven by the hub of the vehicle wheel; and, wherein the first locking assembly comprises a catch device and a self-locking device with continuous locking positions, wherein the self-locking device comprises: a housing with a cavity that is fixed on or formed integrally with the hub of the auxiliary wheel, where a wall of the cavity includes a first frictional contact face and a fourth frictional contact face; a locking member including a second frictional contact face and a third frictional contact face, which is configured to be at least partially within the cavity so that the second and third frictional contact faces face the first and fourth frictional contact faces, respectively; and a first lock block arranged between and in contact with the first and second frictional contact faces, and a second lock block arranged between and in contact with the third and fourth frictional contact faces, so that the first and second lock blocks allow the locking member to be movable in a first direction relative to the housing, but locked in a second direction opposite to the first direction, and the locking member is allowed to be locked at any of the continuous locking positions; wherein, the movement of the locking member in the first direction causes the catch device to abut against the hub of the vehicle wheel, in order to sandwich the hub of the vehicle wheel between the self-locking device and the catch device; and the locking of the locking member in the second direction prevents the catch device from releasing from the hub of the vehicle wheel.