Cable drive assembly
First Claim
1. A cable drive assembly comprising:
- a front drum having a helical front cable groove, the front drum being supported for rotation about a longitudinal axis;
a rear drum having a helical rear cable groove and a nesting chamber inwardly of the helical rear cable groove, the rear drum being supported for rotation about the longitudinal axis;
means including a clutch to drive the first drum in a first direction or to drive the second drum in an opposite direction, the clutch being at least partially disposed in the nesting chamber; and
a spring biasing the front drum and the rear drum in opposite directions.
2 Assignments
0 Petitions
Accused Products
Abstract
A cable drive unit for opening and closing a sliding door on a vehicle (not shown) has a cup-shaped front drum having a helical front cable groove and a rear cup-shaped drum having a helical rear cable groove. The front drum is rotated about a longitudinal axis in a first direction to open the sliding door. The rear drum is partially nested in the front drum and rotated about the longitudinal axis in an opposite direction to close the sliding door. The front drum and the rear drum are drivingly connected to each other via a tension spring that biases the front drum and the rear drum in opposite directions when in tension. The front and rear drums are rotated by a concentric clutch that is nested in the rear drum. The clutch includes a drive member that is drivingly connected to the front drum via a first lost motion connection and drivingly connected to the rear drum via a second lost motion connection. The first drum has an arcuate slot forming part of the first lost motion connection, the rear drum has an arcuate slot forming part of the second lost motion connection, and the drive member has a tab that projects through both arcuate slots to form part of the first lost motion connection and part of the second lost motion connection.
18 Citations
15 Claims
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1. A cable drive assembly comprising:
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a front drum having a helical front cable groove, the front drum being supported for rotation about a longitudinal axis;
a rear drum having a helical rear cable groove and a nesting chamber inwardly of the helical rear cable groove, the rear drum being supported for rotation about the longitudinal axis;
means including a clutch to drive the first drum in a first direction or to drive the second drum in an opposite direction, the clutch being at least partially disposed in the nesting chamber; and
a spring biasing the front drum and the rear drum in opposite directions. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A cable drive comprising:
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a front cup-shaped drum having a front annular rim with a helical front cable groove, the front drum being supported for rotation about a longitudinal axis;
a rear cup-shaped drum having a rear annular rim with a helical rear cable groove, the rear drum being partially nested in the front cup-shaped drum and supported for rotation about the longitudinal axis;
means including an electromagnetic clutch to drive the first drum in a first direction or to drive the second drum in an opposite direction, the electromagnetic clutch being disposed in a nesting chamber of the rear cup-shaped drum, a tension spring that biases the front drum and the rear drum in opposite directions when in tension, the front drum and the rear drum being drivingly connected to each other via the tension spring, and the electromagnetic clutch having a drive member that rotates about the longitudinal axis, the drive member being drivingly connected to the front drum via a first lost motion connection and drivingly connected to the rear drum via a second lost motion connection. - View Dependent Claims (8, 9, 10)
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11. A cable drive assembly comprising:
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a front cup-shaped drum having a front annular rim with a helical front cable groove, the front drum being supported for rotation about a longitudinal axis;
a rear cup-shaped drum having a rear annular rim with a helical rear cable groove, the rear drum being supported for rotation about the longitudinal axis and partially nested in the front cup-shaped drum with the rear annular rim juxtaposed the front annular rim, means including an electromagnetic clutch to drive the first drum in a first direction or to drive the second drum in an opposite direction, the electromagnetic clutch being disposed in a nesting chamber of the rear cup-shaped drum, a tension spring that is located in a part circular, concentric groove of one of the front drum and the rear drum and that biases the front drum and the rear drum in opposite directions when in tension, the front drum and the rear drum being drivingly connected to each other via the tension spring, and a drive member that is attached to the electromagnetic clutch and that rotates about the longitudinal axis, the drive member being drivingly connected to the front drum via a first lost motion connection and drivingly connected to the rear drum via a second lost motion connection, the front drum having an arcuate slot forming part of the first lost motion connection, the rear drum having an arcuate slot forming part of the second lost motion connection, and the drive member having a tab that projects through both arcuate slots to form part of the first lost motion connection and part of the second lost motion connection. - View Dependent Claims (12, 13, 14, 15)
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Specification