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US 12,692,906 B2Granted
Propeller shaft yoke and propeller shaft
AssigneeHitachi Astemo, Ltd.
InventorsMasashi Kubo, Kenichiro Ishikura
Life of this patent
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Abstract
A first arm outer edge chamfered portion and a second arm outer edge chamfered portion are formed along both side edges on an outer side of each of a first arm base portion and a second arm base portion. With this structure, it is possible to reduce a radius (radii) of rotation of a first arm portion and a second arm portion of a first yoke. The reduced radius (radii) can thereby increase a layout property of the first yoke and a propeller shaft using this first yoke.
Claims6
A yoke of a propeller shaft comprising:
- a fixing portion fixed to a rotation shaft;
- a first arm portion and a second arm portion which are a pair of arm portions extending from the fixing portion along an axial direction that is a direction of a rotation axis of the rotation shaft and facing each other in a radial direction that is orthogonal to the axial direction across the rotation axis;
- a cruciform shaft supporting the first arm portion and the second arm portion;
- an arm base portion provided at a base end side of each of the first arm portion and the second arm portion;
- an arm top end portion provided at a top end side with respect to the arm base portion of each of the first arm portion and the second arm portion, the arm top end portion being formed thin relative to the arm base portion by an inner side portion, in the radial direction, thereof being recessed;
- and
- arm outer edge chamfered portions provided at both side edges, in a circumferential direction of the rotation axis, on an outer side, in the radial direction, of the arm base portion of each of the first arm portion and the second arm portion so as to extend along the both side edges of the arm base portion in the axial direction, the arm outer edge chamfered portion being chamfered from the outer side of the arm base portion toward the rotation axis,
- wherein the arm outer edge chamfered portion has an arm outer edge C-chamfered portion having C-chamfering whose cutting surface is a plane surface, an arm outer edge first R-chamfered portion having R-chamfering smoothly connecting the arm outer edge C-chamfered portion and one side surface, in the circumferential direction, of the arm base portion and an arm outer edge second R-chamfered portion having R-chamfering smoothly connecting the arm outer edge C-chamfered portion and the other side surface, in the circumferential direction, of the arm base portion.
5 more elements
A yoke of the propeller shaft comprising:
- a fixing portion fixed to a rotation shaft;
- a first arm portion and a second arm portion which are a pair of arm portions extending from the fixing portion along an axial direction that is a direction of a rotation axis of the rotation shaft and facing each other in a radial direction that is orthogonal to the axial direction across the rotation axis;
- a cruciform shaft supporting the first arm portion and the second arm portion;
- an arm base portion provided at a base end side of each of the first arm portion and the second arm portion;
- an arm top end portion provided at a top end side with respect to the arm base portion of each of the first arm portion and the second arm portion, the arm top end portion being formed thin relative to the arm base portion by an inner side portion, in the radial direction, thereof being recessed;
- and
- arm outer edge chamfered portions provided at both side edges, in a circumferential direction of the rotation axis, on an outer side, in the radial direction, of the arm base portion of each of the first arm portion and the second arm portion so as to extend along the both side edges of the arm base portion in the axial direction, the arm outer edge chamfered portion being chamfered from the outer side of the arm base portion toward the rotation axis,
- wherein each of the first arm portion and the second arm portion has a countersunk portion at an outer end portion of an arm penetration hole in which the cruciform shaft is inserted, and
- wherein the countersunk portion is provided so that a part of the countersunk portion overlaps the arm outer edge chamfered portion in the axial direction.
6 more elements
A propeller shaft comprising:
- a shaft portion;
- and
- a yoke,
- wherein the yoke has
- a fixing portion fixed to a rotation shaft;
- a first arm portion and a second arm portion which are a pair of arm portions extending from the fixing portion along an axial direction that is a direction of a rotation axis of the rotation shaft and facing each other in a radial direction that is orthogonal to the axial direction across the rotation axis;
- a cruciform shaft supporting the first arm portion and the second arm portion;
- an arm base portion provided at a base end side of each of the first arm portion and the second arm portion;
- an arm top end portion provided at a top end side with respect to the arm base portion of each of the first arm portion and the second arm portion, the arm top end portion being formed thin relative to the arm base portion by an inner side portion, in the radial direction, thereof being recessed;
- and
- arm outer edge chamfered portions provided at both side edges, in a circumferential direction of the rotation axis, on an outer side, in the radial direction, of the arm base portion of each of the first arm portion and the second arm portion so as to extend along the both side edges of the arm base portion in the axial direction, the arm outer edge chamfered portion being chamfered from the outer side of the arm base portion toward the rotation axis,
- wherein the arm outer edge chamfered portion has an arm outer edge C-chamfered portion having C-chamfering whose cutting surface is a plane surface, an arm outer edge first R-chamfered portion having R-chamfering smoothly connecting the arm outer edge C-chamfered portion and one side surface, in the circumferential direction, of the arm base portion and an arm outer edge second R-chamfered portion having R-chamfering smoothly connecting the arm outer edge C-chamfered portion and the other side surface, in the circumferential direction, of the arm base portion.
9 more elements
Dependencies are inferred from the claim text.