Steering mechanism for a cleaning vehicle

• US 5,467,500 A
• Filed: 01/27/1993
• Issued: 11/21/1995
• Est. Priority Date: 01/27/1993
• Status: Expired due to Fees

• Current Assignee: AAR Corporation
• Original Assignee: AAR Corporation
• Inventors: O'Hara, Robert J., Knowlton, Christopher M.
• Primary Examiner(s): Scherbel, David
• Assistant Examiner(s): Till, Terrence R.
• Application Number:
  US08/009,816
• Time in Patent Office: 1,028 Days
• Field of Search: 15/4, 15/320, 15/340.1-340.4, 74/98, 280/47.11, 280/95.1, 280/96, 280/98, 280/103, 180/79, 180/79.3
• US Class Current: 15/320
• CPC Class Codes: A47L 11/4061 Steering means; Means for avoiding obstacles; Details related to the place where the driver is accommodated

Abstract

A vehicle for moving in a longitudinal direction and cleaning a surface has a scrub brush, a cleaning fluid dispenser, a squeegee, drive means, and at least one steering wheel which is mounted to the vehicle such that it may be selectively turned for steering the vehicle. The vehicle is provided with a steering mechanism for turning the steering wheel, whereby turning a steering input member a specific angular magnitude in one direction causes the steering wheel to turn a greater angular magnitude in the opposite direction.

Claims

1. A powered cleaning vehicle for moving in a longitudinal direction and cleaning a surface, comprising:

a steering wheel being mounted to said vehicle such that said steering wheel is selectively turned about a generally vertical axis for steering said vehicle;

a steering mechanism for turning said steering wheel having a steering input member being connected to an input gear, said input gear being in meshing engagement with an output gear, said output gear being connected to a first end of a rocker arm, a second end of the rocker arm being operatively connected to said steering wheel, whereby turning said steering input member a specific angular magnitude in one direction causes said steering wheel to turn a greater angular magnitude in an opposite direction;

cleaning means connected to said vehicle and for engaging said surface for cleaning said surface;

a plurality of wheels mounted to said vehicle and engaging said surface; and

driving means mounted to said vehicle and engaging at least one of said wheels for propelling said vehicle in said longitudinal direction;

at least one of said wheels being a steering wheel.

2. The vehicle as set forth in claim 1, wherein said steering mechanism further comprises a torque transmission bar having a first and second end, said first end being affixed to said steering input member and said second end being affixed to said input gear, said output gear having a smaller radius than said input gear and being affixed to said first end of said rocker arm, a second end of which is connected to said steering wheel.

3. The vehicle as set forth in claim 2, wherein said second end of said rocker arm is pivotably connected to a first end of a push rod, a second end of said push rod being pivotably connected to a steering lever arm which is operatively connected to said steering wheel for turning said steering wheel about said generally vertical axis.

4. The vehicle as set forth in claim 1, further comprising a second steering wheel mounted to said vehicle, said first steering wheel being inside of said second steering wheel during a turn of said vehicle when moving in said longitudinal direction, said first and second steering wheels defining a first and second steering wheel angle respectively, said steering mechanism turning said steering wheels so that said first steering wheel angle is greater than said second steering wheel angle.

5. The vehicle as set forth in claim 2, wherein said input gear defines an input angle, said output gear defines an output angle, and said steering wheel defines a steering wheel angle, said steering mechanism being adapted for progressive steering and operating to increase said steering wheel angle at a greater rate with respect to said output gear angle when said output gear angle equals one angular magnitude than when said output gear angle equals a lesser angular magnitude.

6. The vehicle as set forth in claim 1, which further comprises at least two driving wheels mounted to said vehicle and each located in a position leading said steering wheel.

7. The vehicle as set forth in claim 1, wherein said steering mechanism is accessible from behind said vehicle during said longitudinal movement.

8. The vehicle as set forth in claim 1, further comprising a drive means connected to said vehicle and located above said steering wheel, said steering input member being longitudinally offset from said steering wheel.

9. The vehicle as set forth in claim 1, further comprising a cleaning means connected to said vehicle and located above said steering wheel, said steering input member being longitudinally offset from said steering wheel.

10. A cleaning vehicle for moving in a longitudinal direction and cleaning a surface, comprising:

a steering wheel being mounted to said vehicle such that said steering wheel is selectively turned about a generally vertical axis for steering said vehicle; and

a steering mechanism for turning said steering wheel having a steering input member, a torque transmission bar having a first and second end, said first end being affixed to said steering input member and said second end being affixed to an input gear, said input gear being in meshing engagement with an output gear having a smaller radius than said input gear, said output gear being affixed to a first end of a rocker arm, a second end of which is operatively connected to said steering wheel, whereby turning said steering input member a specific angular magnitude in one direction causes said steering wheel to turn a greater angular magnitude in an opposite direction.

11. The vehicle as set forth in claim 10, wherein said second end of said rocker arm is pivotably connected to a first end of a push rod, a second end of said push rod being pivotably connected to a steering lever arm which is operatively connected to said steering wheel for turning said steering wheel about said generally vertical axis.

12. The vehicle as set forth in claim 10, further comprising a second steering wheel mounted to said vehicle, said first steering wheel being inside of said second steering wheel during a turn of said vehicle when moving in said longitudinal direction, said first and second steering wheel defining a first and second steering wheel angle respectively, said steering mechanism turning said steering wheels so that said first steering wheel angle is greater than said second steering wheel angle.

13. The vehicle as set forth in claim 10, wherein said input gear defines an input angle, said output gear defines an output angle, and said steering wheel defines a steering wheel angle, said steering mechanism being adapted for progressive steering and operating to increase said steering wheel angle at a greater rate with respect to said output gear angle when said output gear angle equals one angular magnitude than when said output gear angle equals a lesser angular magnitude.

14. The vehicle as set forth in claim 10, which further comprises at least two driving wheels mounted to said vehicle, each wheel being located in a position leading said steering wheel.

15. The vehicle as set forth in claim 10, wherein said steering input member may be controlled from behind said vehicle during said longitudinal movement.

16. The vehicle as set forth in claim 10, further comprising drive means mounted to said vehicle and located above said steering wheel, said steering input member being longitudinally offset from said steering wheel.

17. The vehicle as set forth in claim 10, further comprising a fluid dispensing means mounted to said vehicle wherein a portion of said fluid dispensing means is located above said steering wheel, said steering input member being longitudinally offset from said steering wheel.

18. The vehicle as set forth in claim 10, hich further comprising:

as least one scrub brush mounted to said vehicle and adapted for rotation around a generally vertical axis;

fluid dispensing means mounted to said vehicle for dispensing a cleaning fluid onto said surface;

a squeegee mounted to said vehicle for picking up said fluid from said surface;

a plurality of wheels mounted to said vehicle and engaging said surface; and

drive means mounted to said vehicle and engaging at least one of said wheels for propelling said vehicle in said longitudinal direction;

at least one of said wheels being a steering wheel.

20. The vehicle as set forth in claim 10, further comprising:

at least one scrub brush adapted for rotation around a generally vertical axis;

fluid dispensing means for dispensing a cleaning fluid onto said surface; and

a squeegee for picking up said fluid from said surface.

19. A battery powered cleaning vehicle, comprising:

scrubbing means mounted to said vehicle and adapted for rotation around a generally vertical axis;

fluid dispensing means mounted to said vehicle for dispensing a cleaning fluid onto said surface;

a squeegee means mounted to said vehicle and for picking up said fluid from said surface;

multiple wheel means mounted to said vehicle and engaging said surface;

drive means mounted to said vehicle and engaging one of said wheel means for propelling said vehicle in a longitudinal direction;

steering wheel means being mounted to said vehicle such that said steering wheel is selectively turned about a generally vertical axis for steering said vehicle; and

steering mechanical means mounted to said vehicle for turning said steering wheel, said steering mechanism means comprising;

a steering input number;

a torque transmission bar having a first and second end, said first end being affixed to said steering input member and said second end being affixed to an input gear;

said input gear being in meshing engagement with an output gear having a smaller radius than said input gear;

said output gear being affixed to a first end of a rocker arm, a second end of which is operatively connected to said steering wheel,

whereby turning said steering input member a specific angular magnitude in one direction causes said steering wheel to turn a greater angular magnitude in an opposite direction.