Steering device for two- and three-wheeled vehicles

A steering device for two- and three-wheeled vehicles which have a frame with a head tube (1), a fork (2) with a stem tube (3), a handlebar stem (4) with handlebars (7), and a stop for the handlebars (7), the stem tube (3) being guided through the head tube (1) of the frame, mounted in the same, by means of an upper and a lower headset bearing, which have a rolling bearing in each case, and connected in a rotationally fixed manner at its upper end, which protrudes out of the head tube (1) of the frame, to the handlebar stem (4), and the stop being arranged in one of the two headset bearings,

• the stop consisting of a base (12), which is connected in a rotationally fixed manner to the fork (2) of the two- or three-wheeled vehicle, on the outer lateral surface of which base a circular arc shaped recess (14), which is open towards the inner lateral surface of the bearing shell (11) of the rolling bearing, is located, and a stop element (15), which is securely arranged in the bearing shell (11) and protrudes radially into the recess (14), the lower bearing shell (11) coaxially accommodating the base (12) and the rolling bearing and being connected in a rotationally fixed manner to the head tube (1),
• characterized
• in that for the rotationally fixed connection of the base (12) to the stem tube (3) of the fork (2), the inner lateral surface of the base (12) or the outer lateral surface of the region of the stem tube (3) connected to the base (12) is substantially constructed as an n-sided polygon, and the lateral surface of the respectively other component of the rotationally fixed connection, which is in operative connection with the polygonal lateral surface, is a cylindrical lateral surface, and/or
• for the rotationally fixed connection of the bearing shell (11) to the head tube (1) of the frame, the outer lateral surface of the lower bearing shell (11) or the inner lateral surface of the region of the head tube connected to the bearing shell (11) is substantially constructed as an n-sided polygon, and the lateral surface of the respectively other component of the rotationally fixed connection, which is in operative connection with the polygonal lateral surface, is a cylindrical lateral surface.