| 摘要 |
771,013. Tyre manipulating apparatus. DUQUESNE, V. Nov. 30, 1954 [Jan. 15, 1954], No. 34667/54. Class 144 (1). In an apparatus for mounting or removing tyres from an open centred wheel in which a base is provided with a mounting plate and an axially movable central bar for holding the wheel the arrangement is such that a wheel centring and locking plate engages the axiallymovable bar and a frusto-conical member is guided within the centring and locating means and engages the central wheel opening and means are provided for fixing the wheel body together with the centring and locking means on the mounting plate. A plate 5 mounted on a base 1 carries a device 21 for centring the wheel. The device 21, held centrally on the plate 5 by one or more concentric steps has a centrally mounted upwardly spring-biased conical member 24 which member 24 engages the opening in the wheel to hold the wheel coaxial with a bar 3 threaded at its lower end into the base 1. The wheel, when in position, rests on an annular friction strip 26 and is held thereon, through the intermediary of a spider 6, a sleeve 7 and a boss of a rotative assembly 8, by a U-shaped washer 15 engaging parallel transverse grooves 4 formed on the bar 3. The rotative assembly 8 carries a conical roller 14 which engages the inner edge of the tyre bead b and a roller 13 which bears downwardly on the bead b to push the bead b over the rim a of the wheel. The assembly 8 is rotated about the bar 3 by a rod inserted in a boss 18. The arm 10 is radially adjustable and the arm 11 vertically adjustable. |
