# US 10,309,446 B2 · Connecting shaft and manufacturing method of connecting shaft

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- Number: US 10,309,446 B2
- Document ID: US10309446B2
- Status: Granted
- Kind: B2
- Application number: 15/425,970
- Filed: 2017-02-06
- Published: 2017-08-10
- Granted: 2019-06-04
- Earliest claimed: 2016-02-10
- Assignees: Honda Motor Co., Ltd.
- Applicants: Honda Motor Co., Ltd.
- Inventors: Yuji Katayama; Yasuhiko Saijo; Hiroaki Kikuchi; Hong Bie
- Web page: https://patentgrep.com/patent/US10309446B2

## CPC

- F16C 3/023: {made of several parts, e.g. by welding}
- B29C 65/48: using adhesives {, i.e. using supplementary joining material; solvent bonding}
- B29C 66/12441: {being a single wall}
- B29C 66/12469: {being asymmetric}
- B29C 66/3262: {as after-treatment, e.g. by a separate tool}
- B29C 66/5221: {for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other}
- B29C 66/721: {Fibre-reinforced materials (B29C66/729 takes precedence)}
- B29C 66/7394: {characterised by the material of at least one of the parts being a thermoset}
- B29C 66/742: {to metals or their alloys}
- F16C 3/026: {Shafts made of fibre reinforced resin}
- F16D 1/027: non-disconnectable, e.g. involving gluing, welding or the like
- F16D 1/108: having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling
- B29C 66/7212: {characterised by the composition of the fibres}
- B29L 2031/75: {Shafts}
- F16C 2226/40: with adhesive
- F16C 2326/06: Drive shafts
- F16D 2001/103: {the torque is transmitted via splined connections}
- F16D 2250/0069: Adhesive bonding
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

## Abstract

A connecting shaft including a first shaft made of metal, a second shaft made of resin, and a collar made of metal including a first fitting portion fitting on an outer peripheral surface of the first shaft and a second fitting portion fitting on an outer peripheral surface of the second shaft. A gap between the outer peripheral surface of the second shaft and an inner peripheral surface of the second fitting portion is filled with an adhesive agent, and the adhesive agent is applied to an outer peripheral surface of the collar to cover an end face of the second fitting portion in an axial direction.

## Claims

### Claim 1

A connecting shaft, comprising:
a first shaft made of metal, the first shaft including a serration formed on an outer peripheral surface at an end part thereof, the serration including a first region and a second region;
a second shaft made of resin, the second shaft including an inner peripheral surface fitting on the first region of the serration at an end part thereof; and
a collar made of metal, the collar including a first fitting portion fitting on the second region of the serration and a second fitting portion fitting on an outer peripheral surface of the second shaft,
wherein a gap between the outer peripheral surface of the second shaft and an inner peripheral surface of the second fitting portion is filled with an adhesive agent,
wherein the collar includes a projection projected radially outward from an outer peripheral surface of the collar over a whole circumference thereof, and
wherein the adhesive agent is applied from the gap up to the outer peripheral surface of the collar between an end face of the second fitting portion in an axial direction and the projection to cover the end face of the second fitting portion.

### Claim 2 (depends on 1)

The connecting shaft according to claim 1, wherein a diameter of an outer peripheral surface of the adhesive agent at the outer peripheral surface of the collar is equal to a diameter of the projection.

### Claim 3 (depends on 1)

The connecting shaft according to claim 1, wherein the projection is a first projection, the collar includes a second projection projected radially outward from the outer peripheral surface of the collar over the whole circumference, and the second projection is axially between the first projection and the first fitting portion.

### Claim 4 (depends on 3)

The connecting shaft according to claim 3, wherein an interfacing edge of the adhesive agent is located at a top of the first projection.

### Claim 5 (depends on 1)

The connecting shaft according to claim 1, wherein an anticorrosion coating is applied from the outer peripheral surface of the collar to the outer peripheral surface of the second shaft to cover the adhesive agent applied up to the outer peripheral surface of the collar.

### Claim 6 (depends on 1)

The connecting shaft according to claim 1, a diameter of an inner peripheral surface of the collar is expanded up to the end face of the second fitting portion.