ENGINE BRAKING PRIMARY CLUTCH FOR CVT SYSTEMS
First Claim
1. A primary clutch assembly comprising:
- a first sheave portion having a first conical-faced surface, the first conical-faced surface configured to engage a first side face of a drive belt, the first sheave portion further having a post centrally extending from the first conical-faced surface;
a cylindrical sleeve coupler rotationally mounted on a portion of the post proximate the first conical-faced surface, the sleeve coupler having an engaging surface configured to engage an inner face of the drive belt;
a second sheave portion having a central passage rotationally mounted on the sleeve coupler, the second sheave portion having a second conical-faced surface positioned to face the first conical-faced surface of the first sheave portion, the second conical-faced surface configured to engage a second side face of the drive belt; and
an engine braking assembly operatively coupled to the second sheave portion and the sleeve coupler to axially move the second sheave portion toward the first sheave portion to engage the first conical-faced surface of the first sheave portion with the first side face of the drive belt and the second conical-faced surface of the second sheave portion with the second side face of the drive belt when the sleeve coupler attempts to overrun the post of the first sheave portion in a rotational direction provided by a rotational output of an engine operatively coupled to the primary clutch.
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Accused Products
Abstract
A continuously variable transmission (CVT) system including a primary clutch assembly with an engine braking assembly is provided. The primary clutch assembly includes first and second sheave assemblies, a cylindrical sleeve coupler and an engine braking assembly. The first sheave portion has a centrally extending post. The cylindrical sleeve coupler is rotationally mounted on a portion of the post. The sleeve coupler has an engaging surface that is configured to engage an inner face of a drive belt. The second sheave portion has a central passage that is rotationally mounted on the sleeve coupler. The engine braking assembly is operatively coupled to the second sheave portion and the sleeve coupler to axially move the second sheave portion toward the first sheave portion to engage first and second side faces of the drive belt when the sleeve coupler attempts to overrun the post of the first sheave portion in a rotational direction provided by a rotational output of an engine operatively coupled to the primary clutch.
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Citations
25 Claims
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1. A primary clutch assembly comprising:
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a first sheave portion having a first conical-faced surface, the first conical-faced surface configured to engage a first side face of a drive belt, the first sheave portion further having a post centrally extending from the first conical-faced surface; a cylindrical sleeve coupler rotationally mounted on a portion of the post proximate the first conical-faced surface, the sleeve coupler having an engaging surface configured to engage an inner face of the drive belt; a second sheave portion having a central passage rotationally mounted on the sleeve coupler, the second sheave portion having a second conical-faced surface positioned to face the first conical-faced surface of the first sheave portion, the second conical-faced surface configured to engage a second side face of the drive belt; and an engine braking assembly operatively coupled to the second sheave portion and the sleeve coupler to axially move the second sheave portion toward the first sheave portion to engage the first conical-faced surface of the first sheave portion with the first side face of the drive belt and the second conical-faced surface of the second sheave portion with the second side face of the drive belt when the sleeve coupler attempts to overrun the post of the first sheave portion in a rotational direction provided by a rotational output of an engine operatively coupled to the primary clutch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A continuously variable transmission (CVT) comprising:
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a primary clutch configured to receive a rotational output of an engine, the primary clutch including, a first sheave portion having a first conical-faced surface, the first conical-faced surface configured to engage a first side face of a drive belt, a post centrally extending from the first conical-faced surface, and a second sheave portion having a central passage rotationally mounted on the post, the second sheave portion having a second conical-faced surface positioned to face the first conical-faced surface, the second conical-faced surface configured to engage a second side face of the drive belt; an engine braking assembly including, a cylindrical sleeve coupler rotationally mounted on a portion of the post of the first sheave portion proximate the first conical-faced surface, the sleeve coupler having a engaging surface configured to engage an inner face of the drive belt, the sleeve coupler further having a portion positioned between the post and the second sheave portion, and a one way clutch (OWC) in rotational communication with the post of the first sheave portion and the sleeve coupler, the OWC configured to cause the second sheave portion to move towards the first sheave portion when the sleeve coupler attempts to overrun the rotation of the post of the first sheave portion; and a second clutch, the secondary clutch including, a secondary sheave system configured to engage the drive belt, the secondary sheave assembly configured to provide a rotational output to a drive train. - View Dependent Claims (15, 16, 17)
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18. A one way clutch (OWC) comprising:
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generally a ring shaped housing having a central passage, the housing further including a plurality of cavities, each cavity including a central passage opening to the central passage, the central passage configured to receive a rotating sleeve, a one way assembly including a plurality of roller pins, each roller pin received in an associated cavity in the housing, the one way assembly configured to allow the housing to rotate freely about the sleeve when the sleeve rotates in a first direction and lock onto the rotation of the sleeve when the sleeve rotates in a second direction; and at least one moving member extending from a surface of the housing configured and arranged to selectively move an adjacent part away from the housing when the OWC is locked onto the rotation of the sleeve. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification