US 6,109,327 AGranted

Tire changing machine

AssigneeButler Engineering and Marketing S.P.A.

InventorTullio Gonzaga

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Abstract

A tire changing machine which comprises: a bed, a frustoconical platform which is supported by the bed and is designed to act as a support for a wheel rim, a hollow shaft which is coaxial to, and rotates rigidly with, the frustoconical platform and raises from said platform and is provided with a threaded portion, a fixed shaft which is arranged within said hollow shaft and protrudes therefrom, securing means scewable onto the hollow shaft for fixing the wheel rim on the platform, a lateral column raising from the said bed, upper bead breaking means carried by the said column and arranged to act from above on a tire on a wheel rim located on the frustoconical platform, lower bead breaking means arranged to act from below on the lower side of a tire on a whell rim placed on the platform, a driving motor for rotating the said frustoconical platform about the said hollow shaft, and automatic locking and releasing means between the said driving motor and said platform to safely clamp the platform against a wheel rim placed thereon.

Claims66

Dependent claims

A tire changing machine comprising:

a support bed;
an at least partly frustoconical platform which is rotatable arranged on the bed to act as a support for a vehicle wheel rim;
a main threaded shaft which is mounted for rotation coaxially with the platform and vertically extend therefrom;
driving means for the rotation of the main shaft;
holding means to be engaged on the main shaft for holding the wheel rim on the platform such that the wheel rim rotates together with said platform when said platform rotates on the bed;
at least one lateral supporting column extending upwards from said bed and pivoted thereto about a substantially horizontal axis to perform controlled angular pitching movements towards, and away from, said platform, the column being extendable and retractable to be positioned between a lowered active position at a desired level with respect to said platform, and a raised resting position;
driving means for controlling the angular movements of said lateral column;
upper bead breaking means supported by said at least one lateral column so as to be adjustable in position with respect to said platform and to act from above on a tire to be mounted on, or removed from, a wheel rim located on the platform;
lower bead breaking means located within said bed and arranged to be lifted against a tire placed on the wheel rim located on the platform;
and
driving means designed to control the movements of said lower bead breaking means.

8 more elements

A tire changing machine comprising:

a supporting bed;
an at least partially frustoconical platform which is arranged on the bed and designed to act as support for a vehicle wheel rim;
a main threaded shaft which is mounted for rotation coaxially with the platform from which it extends vertically upwards;
driving means for the rotation of the main shaft;
means for retaining the Wheel rim on the platform, which can be screwed onto the maw shaft;
at least one lateral supporting column which raises from the said bed;
upper bead breaking, means supported by said at least one lateral column so as to be adjustable in position with respect to the platform and to be able to act from above on a tire to be mounted on, or removed from, the wheel rim placed on the platform;
lower bead breaking means arranged within said bed and designed to be lifted against a tire placed on the wheel rim placed on the platform;
actuation means for the said lower bead breaking means;
and
means for locking and releasing the said platform with respect to the wheel rim, arranged, sequentially to control a relatively small mutual approaching movement between the said platform and said wheel rim, thereby locking the wheel rim against the platform during at least part of a tire mounting or removing operation, and a relative getting away movement for releasing the wheel rim.

8 more elements

A tire changing machine having:

a supporting bed;
a frustoconical platform which is arranged on the bed and arranged to act as a support for a wheel, rim;
a main hollow and externally threaded shaft which is mounted for rotation coaxially with respect to the platform, from which it extends vertically;
a reversible motor for rotating in either direction said main shaft and said platform;
a secondary shaft which extends coaxially along said main shaft and protrudes from it at the top thereof;
holding means for retailing the wheel rim on said platform, said means being screwable onto the main shaft;
at least one lateral supporting column which raises from said bed;
upper bead breaking means supported by said at least one lateral column to be adjustable in position with respect to the platform and to be able to act from above on a tire to be mounted on, or removed from, a wheel rim placed on the platform;
lower bead breaking means arranged within said bed and. designed to raise against a tire placed on a wheel rim arranged on the platform;
driving and control means for said lower and upper bead breaking means, and
locking and releasing means for locking and releasing said platform against a wheel rim placed on it, which are arranged to cause, upon starting the said motor, a relatively small approaching movement between said platform and said wheel rim, thereby locking said wheel rim on the platform, and a getting away movement for releasing the platform from the wheel rim when said motor stops.

8 more elements

Dependencies are inferred from the claim text.