Pulley device, turning machine fitted with such a device and method of mounting such a device on a turning machine

A turning machine comprising:

• a non-rotating housing (2) fitted with a hollow shaft (2a) coaxial with a transmission shaft (3), and
• a pulley device (1) including;
• a pulley (5),
• a torque transmission means (6) intended to be mounted between the pulley (5) and a transmission shaft (3) of a turning machine,
• torque limitation means (16) intended to be mounted between the pulley (5) and the transmission shaft (3), and
• at least one bearing (7) intended to be mounted on a non-rotating housing (2) of the turning machine and provided with an inner race (8) with a bore (8b), through which the inner race (8) is intended to be mounted on the housing (2), an outer race (9) and at least one row of rolling elements (10), and
• axial retention means (17) arranged exclusively radially between the bore (8b) of the inner race (8) and the housing (2).

A method of mounting a pulley device (1) on a turning machine, comprising the following steps:

• (a) fixedly assembling a pulley (5) and torque transmission means (6) and torque limitation means (16) together,
• (b) mounting axial retention means (17) in a bore (8b) of an inner race (8) of a bearing (7),
• (c) mounting the bearing (7) in the pulley (5) and fixedly securing the bearing and pulley together,
• (d) mounting the bearing (7), the axial retention means (17), the pulley (5), the torque transmission means (6) and the torque limitation means (16) on the turning machine, wherein
• (d.1) fixedly assembling the torque transmission means (6) on a transmission shaft (3) of the turning machine, and
• (d.2) mounting the bearing (7) on a housing (2) of the turning machine such that the axial retention means (17) cooperate with the housing (2).