WHEEL INCLUDING A RIM, A HUB, AND A DEVICE FOR COUPLING THE RIM TO THE HUB
A wheel including a rim, a hub, and at least one device for coupling the rim to the hub, the coupling device including a spoke associated with a first head, the hub defining a first groove for receiving a portion of the spoke in a plane perpendicular to the axis of the wheel, and, along a tangential direction with respect to the hub, the hub further defines an abutment along the tangential direction for supporting the head. The hub includes an arrangement for retaining the head along a radial direction, when the spoke is oriented tangentially with respect to the hub.
1 . A wheel comprising:
a rim;
a hub;
at least one device for coupling the rim to the hub, the coupling device comprising a spoke having a first head;
the hub defining a first groove for receiving a portion of the spoke in a plane perpendicular to a rotational axis of the wheel and along a tangential direction with respect to the hub;
the hub further defining an abutment along the tangential direction for supporting the head of the spoke;
the hub further comprising an arrangement to retain the head of the spoke along a radial direction when the spoke is oriented tangentially with respect to the hub.
2 . A wheel according to claim 1 , wherein:
the hub includes a double, tangential and radial, abutment.
3 . A wheel according to claim 1 , wherein:
the hub includes a pair of spaced-apart flanges, each of the flanges including a double abutment and a structure for engaging the spoke.
4 . A wheel according to claim 1 , wherein:
the hub includes a wing defining a double abutment, and another wing defining a structure for engaging the spoke and a tangential abutment.
5 . A wheel according to claim 1 , wherein:
the hub includes three wings, said three wings including a central wing and two outer wings;
an arrangement for engaging the spoke being defined by the central wing or by at least one of the two outer wings.
6 . A wheel according to claim 1 , wherein:
the hub includes a first wing and a second wing, a first groove being demarcated between the first wing and the second wing;
the first wing includes a first through hole forming an abutment and/or the second wing includes a second through hole forming an abutment;
the arrangement to retain the head of the spoke along the radial direction includes the continuous top of a wing in a location where the top extends around the hole defining the abutment.
7 . A wheel according to claim 6 , wherein:
the second wing includes a discontinuous top, a first passage opening the top toward the hole of the second wing.
8 . A wheel according to claim 6 , wherein:
the hub includes a third wing, a second groove being demarcated between the second wing and the third wing;
the second through hole of the second wing forming an abutment and/or a third through hole of the third wing forming an abutment.
9 . A wheel according to claim 8 , wherein:
the second wing includes a discontinuous top, a passage opening the top toward the hole of the second wing.
10 . A wheel according to claim 8 , wherein:
the first wing has a discontinuous top, the second wing has a continuous top, the third wing has a discontinuous top, two passages being arranged in the first and third wings to allow access to holes formed in the wings.
11 . A wheel according to claim 6 , wherein:
the first wing has a widening from one end to the holes.
12 . A wheel according to claim 1 , wherein:
the spoke has a circular cross section;
the head has a circular cross section.
13 . A wheel according to claim 1 , wherein:
the groove has a width equal to or slightly greater than a diameter of the spoke, the head of the spoke having a diameter substantially greater than the diameter of the spoke.
14 . A wheel according to claim 6 , wherein:
the hub includes a flange, the flange including alternating fingers and notches circularly distributed in a plane perpendicular to the rotational axis of the wheel, each wing being a radial extension of a finger.