Motor vehicles – Special driving device – Stepper
Patent
1988-02-03
1991-04-30
Hill, Mitchell J.
Motor vehicles
Special driving device
Stepper
180 85, 254131, 280 46, 280 47131, 280 7911, 414373, 414385, 414786, B62D 57002, B65G 7002
Patent
active
050109693
DESCRIPTION:
BRIEF SUMMARY
SUMMARY OF THE INVENTION
An active wedge is the converter element of a new mechanism which can be used as a drive system in many different fields.
Means which simplify and/or extend the use of the active to various new applications are described below.
BRIEF DESCRIPTION OF THE DRAWINGS
In the figures:
FIG. 1 shows the movement of a load with a mechanical lever;
FIG. 2 shows the movement of load with a mechanical lever and two opposing wedge surfaces providing respective directions of movement;
FIG. 3 shows a device for providing repeated stepwise movement of a load by mechanical or pneumatic means;
FIG. 4 shows a pressure driven cell with the active wedge for a drive driver;
FIG. 5 shows means for the optional forward and backward movement of a load;
FIG. 6 shows a steerable step-by-step drive;
FIG. 7 shows a coupleable pair of sliding-step chassis which may be coupled to a load for the movement thereof;
FIG. 8(a) is a graph showing a timing signal and the binary states of friction which occur during a sliding step, and
FIG. 8(b) is a vector diagram showing forces which occur;
FIG. 9(a) is a graph illustrating a controllable step drive, timing signals and frictional states therein, and
FIG. 9(b) is a vector diagram showing forces that occur therein;
FIG. 10 is a graph of the brake path up to freely resting load;
FIG. 11 is the same of FIG. 10 but with the additional showing of the brake path with an application force of 6.multidot.G;
FIG. 12 is a graph showing an influence off ground friction on the sliding-step process;
FIG. 13 shows an example of the mechanical switching of a load to free running on wheels;
FIG. 14 is an advancing device with lever arm for manual opening or pushing back;
FIG. 15 shows an example of the arrangement of function parts for automatically controlled chassis;
FIG. 16 is an example for the automatic free-running function;
FIG. 17(a) shows in longitudinal cross-section the functional construction of a conveyor system with hose cell;
FIG. 17(b) is a transverse cross-section taken along line B--B of FIG. 17(a);
FIG. 18 shows an example of the connection of the pressure fluid of a hose cell;
FIG. 19 shows the use of a mobile conveyor system;
FIG. 19(a) shows an alternate use of a mobile conveyor system;
FIG. 20 shows conveyor paths arranged crosswise;
FIG. 21 shows a grid-like arrangement of the driver parts;
FIG. 22 shows a drive of a conveyor device having drivers arranged in grid form.
DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS
FIG. 1 shows an extremely simple embodiment of a sliding-step drive having a mechanical lever 1 and a support platform 2 which has ribs 3, 4 and carries a load 5, in accordance with the principles of sliding-step geometry.
The lever arms 6 and 7 have respective act simultaneously on the load 5 via ribs 3 and 4 in straight-line conveying, make it possible also to travel step-wise around curves upon a curved track.
FIG. 2 shows a platform having ribs 10, 11 which make it possible, by the insertion of the lever 12 in either the rib 10 or the rib 11, move stepwise in the direction 14 or the direction 15 respectively,
FIG. 3 shows an advancing device consisting of a part load 21 to be moved in which a lever 22 acts, for instance, via rollers 23 on a U-shaped wedge-thrust body 24 having an inclined roll-down surface 25. By the pressure 26 of the foot, a part of the weight of the load 21 is shifted onto the oblique surface 25 of the wedge-thrust body and the slide step takes place in the direction 27. The repeating of the steps is made possible by the return springs 28 and 29. An alternative for, for instance, pneumatic actuation is a working cylinder 30. A similar auxiliary drive can also be provided via an electric gear motor and eccentric drive (not shown).
As shown in FIG. 4, the pneumatic or hydraulic driving of a previously shown U-shaped wedge-thrust member 24 (FIG. 3), there is advantageously used a so-called H cell (Hermann cell) 35, the moved part of which is provided with at least two rollers 36, 37. Such a cell can exert a thrust force
REFERENCES:
patent: 2653006 (1953-09-01), Lewis
patent: 2874971 (1959-02-01), Devery
patent: 3680838 (1972-08-01), Dunn
patent: 3831691 (1974-08-01), Jenkins
patent: 3975989 (1976-08-01), Hirmann
patent: 4037739 (1977-07-01), Lee
patent: 4104425 (1978-08-01), Hirmann
patent: 4121679 (1978-10-01), March
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