Auxiliary drive for vehicles
First Claim
Patent Images
1. An electrically driven auxiliary drive for vehicles comprising:
- first and second electric motors each having associated therewith a friction drive element; and
means for selectably bringing the friction drive elements into operative driving engagement with the tire of a vehicle wheel while the friction drive elements are maintained in fixed mutually spaced relationship.
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Accused Products
Abstract
An electrically driven auxiliary drive for vehicles including first and second electric motors each having associated therewith a friction drive element and apparatus for selectably bringing the friction drive elements into operative driving engagement with the tire of a vehicle wheel for driving thereof the friction drive elements being maintained in fixed mutually spaced relationship.
97 Citations
38 Claims
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1. An electrically driven auxiliary drive for vehicles comprising:
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first and second electric motors each having associated therewith a friction drive element; and means for selectably bringing the friction drive elements into operative driving engagement with the tire of a vehicle wheel while the friction drive elements are maintained in fixed mutually spaced relationship. - View Dependent Claims (8, 9, 10, 22, 23, 24, 25, 26, 27, 28, 32, 33, 34, 35)
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2. An auxiliary drive for vehicles comprising:
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first and second electric motors each having associated therewith a friction drive element said friction drive elements being maintained in fixed mutually spaced relationship; means for selectably bringing the friction drive elements into operative driving engagement with a vehicle wheel having a rotation axis, for driving thereof including means for pivoting said first and second electric motors about an axis parallel to the rotation axis.
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3. An auxiliary drive for vehicles comprising:
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first and second electric motors each having associated therewith a friction drive element said friction drive elements being maintained in fixed mutually spaced relationship; means for mounting the first and second electric motors about a single pivot axis, means for selectably pivoting the first and second electric motors about the single pivot axis, thus selectively bringing the friction drive elements into operative driving engagement with a vehicle wheel having a rotation axis parallel to the pivot axis for driving of the vehicle wheel, and wherein said means for mounting said first and second electric motors includes means for permitting limited motion of said first and second electric motors in a plane parallel to said pivot axis and said rotation axis thereby to enable said first and second motors to maintain driving engagement with the vehicle wheel notwithstanding eccentricities thereof.
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4. An electrically driven auxiliary drive and regenerative braking system for vehicles comprising:
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first and second electric motors each having associated therewith a friction drive element said friction drive elements being maintained in fixed mutually spaced relationship; means for selectably bringing the friction drive elements into operative driving engagement with a vehicle wheel having a rotation axis for driving of the vehicle wheel in a driving mode of operation, by pivoting the friction drive about a pivot axis parallel to the rotation axis, and for being driven thereby in a regenerative braking mode of operation; and electrical energy storage means for supplying electrical power to the first and second electric motors during operation in the driving mode and for receiving electrical power from the first and second electric motors during operation in the regenerative braking mode of operation. - View Dependent Claims (5, 21, 29, 30, 31)
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6. An electrically driven auxiliary drive for vehicles comprising:
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first and second electric motors each having associated therewith a friction drive element said friction drive elements being maintained in fixed mutually spaced relationship; means for mounting the first and second electric motors and friction drive elements so as to permit limited motion thereof in fixed mutually spaced relationship in a plane; means for selectably bringing said friction drive elements into operative driving engagement with a vehicle wheel for driving thereof, said vehicle wheel having a rotation axis extending parallel to said plane; and electrical energy storage means for supplying electrical power to the first and second electric motors, wherein the electrical energy storage means is readily removed from the auxiliary drive for recharging at a remote location. - View Dependent Claims (7)
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11. An electrically driven auxiliary drive for vehicles comprising:
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first and second friction drive elements, at least one of which having associated therewith an electric motor; and means for selectably bringing the wheel engagement elements into operative driving engagement with a vehicle wheel, while the friction drive elements are maintained in fixed mutually spaced relationship. - View Dependent Claims (18, 20)
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12. An auxiliary drive for vehicles comprising:
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first and second friction drive elements, at least one of which having associated therewith an electric motor; means for selectably bringing the wheel engagement elements into operative driving engagement with a vehicle wheel, while the friction drive elements are maintained in fixed mutually spaced relationship; and motor control apparatus for operating the electric motor including apparatus preventing motor operation when the wheel engagement elements are not in operative driving engagement with the vehicle wheel. - View Dependent Claims (19)
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13. An auxiliary drive for vehicles comprising:
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first and second wheel engagement elements, at least one of which having associated therewith an electric motor; means for mounting the first and second wheel engagement elements about a single pivot point; and means for selectably pivoting the first and second wheel engagement elements together in fixed mutually spaced relationship, about the single pivot point, thus selectively bringing the wheel engagement elements into operative driving engagement with a vehicle wheel for driving thereof.
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14. An electrically driven auxiliary drive and regenerative braking system for vehicles comprising:
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first and second wheel engagement elements, at least one of which having associated therewith an electric motor; means for selectably bringing the wheel engagement elements while they are maintained in fixed mutually spaced relationship into operative driving engagement with a vehicle wheel for driving thereof in a driving mode of operation, and for being driven thereby in a regenerative braking mode of operation, and electrical energy storage means for supplying electrical power to the electric motor during operation in the driving mode and for receiving electrical power from the electric motor during operation in the regenerative braking mode of operation. - View Dependent Claims (15)
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16. An electrically driven auxiliary drive for vehicles comprising:
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first and second wheel engagement elements, at least one of which having associated therewith an electric motor; means for selectably bringing said wheel engagement elements, while they are in fixed mutually spaced relationship, into operative driving engagement with a vehicle wheel for driving thereof; and electrical energy storage means for supplying electrical power to the electric motor, wherein the electrical energy storage means is readily removed from the auxiliary drive for recharging at a remote location. - View Dependent Claims (17)
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36. An electrically driven auxiliary drive for vehicles comprising:
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first and second electric motors each having associated therewith a friction drive element, said friction drive elements being maintained in fixed mutually spaced relationship; means for selectably bringing the friction drive elements into operative driving engagement with a vehicle wheel having a rotation axis for driving of the vehicle wheel in a driving mode of operation, by pivoting the friction drive about a pivot axis parallel to the rotation axis.
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37. An electrically driven auxiliary drive for vehicles comprising:
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first and second electric motors each having associated therewith a friction drive element, said friction drive elements being maintained in fixed mutually spaced relationship; means for mounting the friction drive elements in operative driving engagement with a vehicle wheel having a rotation axis for driving of the vehicle wheel in a driving mode of operation, by pivoting the friction drive on a pivot axle and including means for selectable looking of the pivot axle with respect to the vehicle, whereby when the pivot axle is in a first rotational orientation translation of the pivot axle is prevented and when the pivot axle is in a second rotational orientation the pivot axle can be lifted, together with the first and second electric motors, out of engagement with the vehicle.
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38. An electrically driven auxiliary drive for vehicles comprising:
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first and second electric motors each having associated therewith a friction drive element; means for selectably bringing the friction drive elements into operative driving engagement with a vehicle wheel having a rotation axis for driving of the vehicle wheel in a driving mode of operation; and means for controlling the electric motors such that no driven rotational motion of the drive elements is provided when the vehicle wheel with which they are in engagement is stationary, thereby eliminating unnecessary wear and load on the drive elements, vehicle wheel and electric motors.
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Specification