Steering device for steering wheels

Steering apparatus for steering wheels of a vehicle, comprising support means arranged for supporting said wheels, driving means arranged for rotating said support means around respective longitudinal axis means and connecting means arranged for connecting said driving means with said support means, said connecting means comprising transmission gear means which comprises gear wheel means associated with said support means and further gear wheel means connected with said driving means and engaging with said gear wheel means, wherein said further gear wheel means has a pitch diameter greater than the pitch diameter of said gear wheel means.

Apparatus according to claim 1, wherein said gear wheel means and said further gear wheel means have respective axes of rotation mutually parallel.

Apparatus according to claim 1, wherein said gear wheel means and said further gear wheel means have respective axes of rotation mutually concurrent.

Apparatus according to claim 1, wherein said gear wheel means and said further gear wheel means have respective axes of rotation mutually non-intersecting.

Apparatus according to claim 1, wherein said further gear wheel means comprises a sector gear.

Apparatus according to claim 1, wherein said driving means comprises electric motor means.

Apparatus according to claim 1, wherein said driving means comprises hydraulic motor means.

Apparatus according to claim 1, wherein said driving means comprises actuator means.

Apparatus according to claim 8, wherein said connecting means further comprises link means arranged for connecting said actuator means with said further gear wheel means.

Apparatus according to claim 9, wherein said link means comprises lever means pivotally connected with said further gear wheel means in eccentric position.

Vehicle, comprising steering wheel means and steering means arranged for controlling said steering wheel means, said steering means comprising support means arranged for supporting said steering wheel means, driving means arranged for rotating said support means around respective longitudinal axis means and connecting means arranged for connecting said driving means with said support means, said connecting means comprising transmission gear means which comprises gear wheel means associated with said support means, and further gear wheel means connected with said driving means and engaging with said gear wheel means, wherein said further gear wheel means has a pitch diameter greater than the pitch diameter of said gear wheel means.

Vehicle according to claim 11, wherein said gear wheel means and said further gear wheel means have respective axes of rotation mutually parallel.

Vehicle according to claim 11, wherein said gear wheel means and said further gear wheel means have respective axes of rotation mutually concurrent.

Vehicle according to claim 11, wherein said gear wheel means and said further gear wheel means have respective axes of rotation non-intersecting.

Vehicle according to claim 11, wherein said further gear wheel means comprises a sector gear.

Vehicle according to claim 11, wherein said steering wheel means comprises a first steering wheel and a second steering wheel.

Vehicle according to claim 11, wherein said driving means comprises motor means.

Vehicle according to claim 17, wherein said motor means comprises electric motor means.

Vehicle according to claim 17, wherein said motor means comprises hydraulic motor means.

Vehicle according to claim 17, wherein said motor means comprises a first motor associated with said first steering wheel and a second motor associated with said second steering wheel.

Vehicle according to claim 20, and further comprising electronic command and control means arranged for actuating said first motor and said second motor so as to coordinate the relative rotation of said first steering wheel and said second steering wheel.

Vehicle according to claim 11, wherein said driving means comprises actuator means.

Vehicle according to claim 22, wherein said connecting means further comprises link means arranged for connecting said actuator means with said further gear wheel means.

Vehicle according to claim 23, wherein said link means comprises lever means pivotally connected with said further gear wheel means in eccentric position.

Vehicle according to claim 22, wherein said actuator means comprises a first actuator associated with said first steering wheel and a second actuator associated with said second steering wheel.

Vehicle according to claim 25, and further comprising electronic command and control means arranged for actuating said first actuator and said second actuator so as to coordinate the relative rotation of said first steering wheel and said second steering wheel.

Vehicle according to claim 23, wherein said actuator means comprises an actuator suitable for simultaneously controlling, via said link means, said first steering wheel and said second steering wheel.