DISC WITH INSERTABLE PINS AND METHOD OF MANUFACTURE FOR SAME
First Claim
1. A method of manufacturing a disc for a continuously variable transmission (CVT) having a plurality of traction planets, each traction planet having a tiltable axis of rotation, the method comprising:
- forming a disc from a material having a first set of properties, the disc including at least two sets of features;
machining, from a first feature in each set of features, a recess for retaining a first end of a pin;
machining, from a second feature in each set of features, a retaining feature for retaining a second end of a pin; and
positioning a pair of pins into the at least two sets of features, each pin formed from a second material having a second set of properties, the second set of properties being different than the first set of properties, wherein the pair of pins forms a slot.
4 Assignments
0 Petitions
Accused Products
Abstract
A disc for controlling tilt angle for a plurality of axles in a ball planetary continuously variable transmission (CVT) is provided. A disc body is formed and pins are inserted to create slots. Each slot can be configured for contact with one end of an axle of a traction planet. The pins may be made from a different material or otherwise have different characteristics or properties than the disc body, allowing greater availability of materials that can be selected for forming the slots. The pins can be simple (such as a straight, cylindrical shape) or complex (including a complex curve of different diameters, multiple surfaces, and the like. A manufacturing process for a disc may include forming a disc body using a first process and then adding or removing material using a second process, then inserting pins into the disc body.
21 Citations
33 Claims
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1. A method of manufacturing a disc for a continuously variable transmission (CVT) having a plurality of traction planets, each traction planet having a tiltable axis of rotation, the method comprising:
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forming a disc from a material having a first set of properties, the disc including at least two sets of features; machining, from a first feature in each set of features, a recess for retaining a first end of a pin; machining, from a second feature in each set of features, a retaining feature for retaining a second end of a pin; and positioning a pair of pins into the at least two sets of features, each pin formed from a second material having a second set of properties, the second set of properties being different than the first set of properties, wherein the pair of pins forms a slot. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of manufacturing a speed ratio adjusting mechanism for a continuously variable transmission (CVT) having a plurality of traction planets, each traction planet having an axle defining a tiltable axis of rotation, the method comprising:
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forming a disc from a material having a first set of properties, the disc including at least two sets of features; forming a slot for an end of each axle, wherein forming the slot comprises; machining, from a first feature in each set of features, a recess for a first end of a pin; and machining, from a second feature in each set of features, a retaining feature for a second end of a pin; and forming a slot using a pair of pins, wherein forming the slot comprises positioning the pair of pins into the at least two sets of features, each pin formed from a second material having a second set of properties, the second set of properties being different than the first set of properties. - View Dependent Claims (8, 9)
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10. A disc for a continuously variable transmission (CVT) having a plurality of traction planets, each traction planet having a tiltable axis of rotation, comprising:
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a disc body formed from a material having a first set of properties, the disc body including at least two sets of features, wherein a first feature in each set of features is configured for receiving a first end of a pin, and wherein a second feature in each set of features is configured for receiving a second end of a pin; and a pair of pins, each pin formed from a second material having a second set of properties, each pin of the pair of pins being insertable into the first feature and the second feature of a set of features to form a slot. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A speed ratio adjusting mechanism for a continuously variable transmission (CVT) having a plurality of traction planets, each traction planet having an axle defining a tiltable axis of rotation, the speed ratio adjusting mechanism comprising:
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a first disc comprising a first disc body formed from a material having a first set of properties, the first disc including a first plurality of slots, each slot formed from at least two sets of features; and a first plurality of pins, wherein a first set of features is configured for receiving a first end of the first plurality of pins, wherein a second set of features is configured for receiving a second end of the first plurality of pins; a second disc comprising a second disc body formed from a material having a second set of properties, the second disc including a second plurality of slots, each slot formed from at least two sets of features; and a second plurality of pins, wherein a first set of features is configured for receiving a first end of the second plurality of pins, wherein a second set of features is configured for receiving a second end of the second plurality of pins; and an actuator for rotating the first disc relative to the second disc. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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28. A continuously variable transmission (CVT) comprising:
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a plurality of traction planets, each traction planet having an axle defining a tiltable axis of rotation; and a speed ratio adjusting mechanism comprising; a first disc comprising a first disc body formed from a material having a first set of properties, the first disc including a first plurality of slots, each slot formed from at least two sets of features; and a first plurality of pins, wherein a first set of features is configured for receiving a first end of the first plurality of pins, wherein a second set of features is configured for receiving a second end of the first plurality of pins; a second disc comprising a second disc body formed from a material having a second set of properties, the second disc including a second plurality of slots, each slot formed from at least two sets of features; and a second plurality of pins, wherein a first set of features is configured for receiving a first end of the second plurality of pins, wherein a second set of features is configured for receiving a second end of the second plurality of pins; and an actuator for rotating the first disc relative to the second disc. - View Dependent Claims (29, 30, 31, 32, 33)
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Specification