US 12,110,927 B2Granted

Torque transmission shaft

AssigneeNsk Ltd.

InventorsSeiichi Moriyama, Keisuke Nakao

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Abstract

A torque transmission shaft includes a shaft and a clamp. The shaft includes: a male serration in one axial end portion; a slit in the other axial end portion, the slit axially extending and having a closed end on one side and an open end on the other side; a fitting cylinder portion in the other axial end portion; and a female serration provided in of the other axial end portion. The clamp includes: a discontinuous portion arranged at one place in the circumferential direction; a pair of flange portions arranged on both sides of the discontinuous portion; a connecting portion connecting the flange portions; and an insertion hole for fitting cylinder portion. The clamp is fitted onto the fitting cylinder portion to reduce the diameter of the fitting cylinder portion by narrowing the width dimension of the discontinuous portion.

Claims18

Dependent claims

A torque transmission shaft, comprising:

a shaft having a hollow cylindrical shape and including:
a male serration provided on an outer circumferential surface of one end portion in an axial direction;
a slit provided in the other end portion in the axial direction, extending in the axial direction, and having a closed end on one side in the axial direction and an open end on the other side in the axial direction;
a fitting cylinder portion provided in the other end portion in the axial direction;
and a female serration provided on an inner circumferential surface of the other end portion in the axial direction;
and a clamp having an incomplete cylindrical shape and including:
a discontinuous portion arranged at one place in a circumferential direction;
a pair of flange portions arranged on both sides in the circumferential direction of the discontinuous portion and having mounting holes into which a tightening member can be inserted;
a connecting portion having a partially cylindrical shape and connecting the pair of flange portions in the circumferential direction;
and an insertion hole into which the fitting cylinder portion is inserted;
wherein the clamp is externally fitted onto the fitting cylinder portion and is able to reduce a diameter of the fitting cylinder portion by narrowing a width dimension of the discontinuous portion,
wherein the female serration is provided only on an inner circumferential surface of the fitting cylinder portion, and one end portion in the axial direction of the slit is located on the one side in the axial direction from the fitting cylinder portion, and is located at a portion having an outer diameter dimension and an inner diameter dimension larger than the fitting cylinder portion, and
wherein the shaft has a conical cylinder portion in a portion adjacent to the one side in the axial direction of the fitting cylinder portion having an outer diameter dimension and inner diameter dimension that become larger as going toward the one side in the axial direction, and the one end portion in the axial direction of the slit is located on the one side in the axial direction from the conical cylinder portion.

10 more elements

A torque transmission shaft, comprising:

a shaft having a hollow cylindrical shape and including:
a male serration provided on an outer circumferential surface of one end portion in an axial direction;
a slit provided in the other end portion in the axial direction, extending in the axial direction, and having a closed end on one side in the axial direction and an open end on the other side in the axial direction;
a fitting cylinder portion provided in the other end portion in the axial direction;
and a female serration provided on an inner circumferential surface of the other end portion in the axial direction;
and a clamp having an incomplete cylindrical shape and including:
a discontinuous portion arranged at one place in a circumferential direction;
a pair of flange portions arranged on both sides in the circumferential direction of the discontinuous portion and having mounting holes into which a tightening member can be inserted;
a connecting portion having a partially cylindrical shape and connecting the pair of flange portions in the circumferential direction;
and an insertion hole into which the fitting cylinder portion is inserted;
wherein the clamp is externally fitted onto the fitting cylinder portion and is able to reduce a diameter of the fitting cylinder portion by narrowing a width dimension of the discontinuous portion,
wherein the connecting portion includes a notch that is provided on a portion on the other side in the axial direction, and is recessed on the one side in the axial direction from an end surface on the other side in the axial direction of the pair of flange portions, and
wherein the notch has an edge on the one end in the axial direction which is located on the other side in the axial direction from a center axis of the mounting holes and on the one side in the axial direction from an edge on the other end in the axial direction of the mounting holes.

10 more elements

A torque transmission shaft, comprising:

a shaft having:
a male serration provided on an outer circumferential surface of one end portion in an axial direction;
a slit provided in the other end portion in the axial direction, extending in the axial direction, and having a closed end on one side in the axial direction and an open end on the other side in the axial direction;
a fitting cylinder portion provided in the other end portion in the axial direction;
and a female serration provided on an inner circumferential surface of the other end portion in the axial direction;
and a clamp having:
a discontinuous portion arranged at one place in a circumferential direction;
a pair of flange portions arranged on both sides in the circumferential direction of the discontinuous portion and having mounting holes into which a tightening member can be inserted;
a connecting portion configured to connect the pair of flange portions in the circumferential direction;
and an insertion hole into which the fitting cylinder portion is inserted;
wherein the clamp is externally fitted onto the fitting cylinder portion and is able to reduce a diameter of the fitting cylinder portion by narrowing a width dimension of the discontinuous portion, and
wherein the connecting portion includes a notch that is provided on a portion on the other side in the axial direction, and is recessed on the one side in the axial direction from an end surface on the other side in the axial direction of the pair of flange portions, and
wherein the notch has an edge on the one end in the axial direction which is located on the other side in the axial direction from a center axis of the mounting holes and on the one side in the axial direction from an edge on the other end in the axial direction of the mounting holes.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/425,163Filed 22 Jan 2020
Priority: JP 2019-00901123 Jan 2019
Published: US 2022/0120319 A121 Apr 2022
Granted: 8 Oct 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

F16C 3/023
Shafts; Axles: made of several parts, e.g. by welding
F16D 1/0864
With radial clamping between the mating surfaces of the hub and shaft: due to tangential loading of the hub, e.g. a split hub
F16D 1/068
Non-disconnectable: involving gluing, welding or the like
F16D 1/072
Non-disconnectable: involving plastic deformation