Straddle vehicle

Patent metadata

Field	Value
Publication number	US-10112677-B2
Application number	US-201315102501-A
Country	US
Kind code	B2
Filing date	Dec 19, 2013
Priority date	Dec 19, 2013
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A straddle-type vehicle comprises a vehicle body frame; an axle which is rotatable integrally with a wheel; a swing arm having a front end portion pivotably mounted to the vehicle body frame, and a rear end portion to which the axle is rotatably mounted; a first coupling member to which rotational driving power from a driving source is transmitted is coaxially, rotatably mounted to the axle via a bearing; and a second coupling member coaxial with the axle and including a joining portion non-rotatably joined to the axle, a fitting portion fitted to the first coupling member via a buffering member, and a coupling portion for coupling the joining portion to the fitting portion, wherein the coupling portion is placed axially outward relative to the first coupling member, and the joining portion extends from axially outside between the first coupling member and the axle.

First claim

The invention claimed is:

1. A straddle vehicle comprising:
a vehicle body frame to which a driving source for generating traveling driving power is mounted;
an axle which is rotatable integrally with a wheel;
a swing arm having a front end portion mounted to the vehicle body frame in such a manner that the swing arm is pivotable, and a rear end portion to which the axle is rotatably mounted;
a first coupling member which includes a driven member to which rotational driving power from the driving source is transmitted, is placed coaxially with the axle, and is mounted to the axle via a bearing in such a manner that the first coupling member is relatively rotatable with respect to the axle;
a second coupling member including a joining portion joined to the axle in such a manner that the joining portion is rotatable together with the axle, a fitting portion fitted to the first coupling member via a buffering member, and a coupling portion for coupling the joining portion to the fitting portion, the second coupling member being placed coaxially with the axle; and
a hub coupled to the axle,
wherein the first coupling member and the second coupling member are fastened from a first side in an axial direction by use of a first fastener member, and
wherein the hub is fastened from a second side in the axial direction by use of a second fastener member,
wherein the axle is provided with a first spline groove and a second spline groove,
wherein the second coupling member is provided with a coupling spline groove which is spline-coupled to the first spline groove,
wherein the hub is provided with a hub spline groove which is spline-coupled to the second spline groove, and
wherein the axle includes a first stepped portion and a second stepped portion which are placed between the first spline groove and the second spline groove.

2. The straddle vehicle according to claim 1 ,
wherein the first coupling member includes a tubular wall provided coaxially with the axle, and
wherein the driven member is provided integrally with the tubular wall.

3. The straddle vehicle according to claim 1 ,
wherein the coupling portion is provided with a rib protruding outward in the axial direction.

4. The straddle vehicle according to claim 1 ,
wherein the bearing is placed between an inner peripheral surface of the first coupling member and an outer peripheral surface of the axle,
wherein an inner race of the bearing is supported from inside in a vehicle width direction, by a protruding portion of the axle which protrudes radially outward, and
wherein an outer race of the bearing is supported from inside in the vehicle width direction, by the first coupling member.

5. A straddle vehicle comprising:
a vehicle body frame to which a driving source for generating traveling driving power is mounted;
an axle which is rotatable integrally with a wheel;
a swing arm having a front end portion mounted to the vehicle body frame in such a manner that the swing arm is pivotable, and a rear end portion to which the axle is rotatably mounted;
a first coupling member which includes a driven member to which rotational driving power from the driving source is transmitted, is placed coaxially with the axle, and is mounted to the axle via a bearing in such a manner that the first coupling member is relatively rotatable with respect to the axle;
a second coupling member including a joining portion joined to the axle in such a manner that the joining portion is rotatable together with the axle, a fitting portion fitted to the first coupling member via a buffering member, and a coupling portion for coupling the joining portion to the fitting portion, the second coupling member being placed coaxially with the axle; and
a hub coupled to the axle,
wherein the axle is provided with a first spline groove and a second spline groove,
wherein the second coupling member is provided with a coupling spline groove which is spline-coupled to the first spline groove,
wherein the hub is provided with a hub spline groove which is spline-coupled to the second spline groove, and
wherein the axle includes a first stepped portion and a second stepped portion which are placed between the first spline groove and the second spline groove.

6. The straddle vehicle according to claim 5 ,
wherein an axial dimension of the joining portion is substantially equal to that of the first coupling member.

7. The straddle vehicle according to claim 5 ,
wherein an axial outer end surface of the joining portion is located outward in the axial direction relative to the coupling portion.

8. A straddle vehicle comprising:
a vehicle body frame to which a driving source for generating traveling driving power is mounted;
an axle which is rotatable integrally with a wheel;
a swing arm having a front end portion mounted to the vehicle body frame in such a manner that the swing arm is pivotable, and a rear end portion to which the axle is rotatably mounted;
a first coupling member which includes a driven member to which rotational driving power from the driving source is transmitted, is placed coaxially with the axle, and is mounted to the axle via a bearing in such a manner that the first coupling member is relatively rotatable with respect to the axle;
a second coupling member including a joining portion joined to the axle in such a manner that the joining portion is rotatable together with the axle, a fitting portion fitted to the first coupling member via a buffering member, and a coupling portion for coupling the joining portion to the fitting portion, the second coupling member being placed coaxially with the axle; and
a hub coupled to the axle,
wherein the first coupling member further includes a tubular inner peripheral wall provided coaxially with the axle, a tubular outer peripheral wall which is provided coaxially with the axle and located radially outward relative to the inner peripheral wall, and a side wall of an annular disc shape which is provided coaxially with the axle and couples the outer peripheral wall to the inner peripheral wall, and
wherein the driven member is placed at an intermediate portion of the outer peripheral wall in an axial direction.

9. A straddle vehicle comprising:
a vehicle body frame to which a driving source for generating traveling driving power is mounted;
an axle which is rotatable integrally with a wheel;
a swing arm having a front end portion mounted to the vehicle body frame in such a manner that the swing arm is pivotable, and a rear end portion to which the axle is rotatably mounted;
a first coupling member which includes a driven member to which rotational driving power from the driving source is transmitted, is placed coaxially with the axle, and is mounted to the axle via a bearing in such a manner that the first coupling member is relatively rotatable with respect to the axle;
a second coupling member including a joining portion joined to the axle in such a manner that the joining portion is rotatable together with the axle, a fitting portion fitted to the first coupling member via a buffering member, and a coupling portion for coupling the joining portion to the fitting portion, the second coupling member being placed coaxially with the axle; and
a hub coupled to the axle,
wherein the driven member is placed to overlap with the joining portion when viewed from a direction perpendicular to an axial direction.

10. A straddle vehicle comprising:
a vehicle body frame to which a driving source for generating traveling driving power is mounted;
an axle which is rotatable integrally with a wheel;
a swing arm having a front end portion mounted to the vehicle body frame in such a manner that the swing arm

Assignees

• Kawasaki Heavy Ind Ltd

Inventors

• Ishii Hiroshi
• Yamamoto Tomo
• Saeki Daisuke

Classifications

• B62M9/00

  Transmissions characterised by use of an endless chain, belt, or the like (cycle chain guards B62J13/00) · CPC title

• B62J2099/002

  Operations & Transport · mapped topic

• B62J99/00

  Subject matter not provided for in other groups of this subclass · CPC title

• B62K25/005 Primary

  characterised by the axle being supported at one end only · CPC title

• B62K25/04 Primary

  for mounting axles resiliently on cycle frame or fork (for sidecars, forecars or the like B62K27/06) · CPC title