Rotational driving force transmission mechanism

Patent metadata

Field	Value
Publication number	US-11428271-B2
Application number	US-201816132649-A
Country	US
Kind code	B2
Filing date	Sep 17, 2018
Priority date	Sep 19, 2017
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

Abstract

A rotational driving force transmission mechanism includes a cylindrical shaft made of fiber reinforced plastic, and a first constant velocity joint. The shaft is joined to the first constant velocity joint via a metallic intervening member which is attached to one end of the shaft in the axial direction. The intervening member includes a shaft portion and a main body portion. The shaft portion is inserted into the one end of the shaft from a distal end side thereof. The main body portion is of a bottomed tubular shape made up from a bottom part joined to a proximal end side of the shaft portion, and a tubular portion fitted over the one end of the shaft. The first constant velocity joint includes an inner ring fitted externally over the tubular portion of the intervening member.

First claim

What is claimed is:

1. A rotational driving force transmission mechanism, comprising a cylindrical shaft made of fiber reinforced plastic, and a constant velocity joint, wherein:
the shaft is joined to the constant velocity joint via a metallic intervening member which is attached to at least one end of the shaft in an axial direction of the shaft;
the intervening member includes a shaft portion configured to be inserted into the one end of the shaft from a distal end side thereof, and a main body portion of a bottomed tubular shape, made up from a bottom part joined to a proximal end side of the shaft portion, and a tubular portion configured to be fitted externally over the one end of the shaft;
the tubular portion and the shaft portion extend toward the shaft from the bottom part;
the one end of the shaft is sandwiched between the shaft portion and the tubular portion;
the constant velocity joint includes an annular member fitted externally over the tubular portion of the intervening member;
the tubular portion is sandwiched between the shaft and the annular member; and
the shaft and the intervening member are fixed in a state that the shaft and the intervening member do not move relative to each other.

2. The rotational driving force transmission mechanism according to claim 1 , wherein:
protrusions extending along an axial direction of the shaft portion are disposed in plurality on an outer circumference of the shaft portion at intervals in a circumferential direction of the shaft portion, whereby ridges and valleys are arranged alternately in the circumferential direction; and
on the shaft portion, an outer diameter of the ridges is greater than an inner diameter of the shaft, and an outer diameter of the valleys is less than the inner diameter of the shaft.

3. The rotational driving force transmission mechanism according to claim 1 , wherein an adhesive layer is disposed between an outer circumferential surface of the shaft portion and an inner circumferential surface of the shaft.

4. The rotational driving force transmission mechanism according to claim 1 , wherein an adhesive layer is disposed between an outer circumferential surface of the shaft and an inner circumferential surface of the tubular portion.

5. The rotational driving force transmission mechanism according to claim 1 , wherein serrations configured to be fitted mutually together are formed on an outer circumference of the tubular portion and an inner circumference of the annular member.

6. The rotational driving force transmission mechanism according to claim 1 , wherein the tubular portion is press-fitted into the annular member.

7. The rotational driving force transmission mechanism according to claim 1 , wherein the tubular portion is thicker on a side of an opening than on a side of the bottom part.

Assignees

• Honda Motor Co Ltd

Inventors

• Kamikawa Mitsuru
• Sakakibara taisuke
• Suto Junichi

Classifications

• F16D3/223 Primary

  the rolling members being guided in grooves in both coupling parts · CPC title

• F16C2326/02

  Wheel hubs or castors · CPC title

• F16C3/026 Primary

  Shafts made of fibre reinforced resin · CPC title

• B29C65/565

  involving interference fits, e.g. force-fits or press-fits (B29C65/66 takes precedence) · CPC title

• B29C65/64

  Joining a non-plastics element to a plastics element, e.g. by force (B29C65/44 takes precedence) · CPC title