Motorcycle front suspension

Patent metadata

Field	Value
Publication number	US-11319016-B2
Application number	US-201917044167-A
Country	US
Kind code	B2
Filing date	Apr 19, 2019
Priority date	Apr 27, 2018
Publication date	May 3, 2022
Grant date	May 3, 2022

Abstract

A motorcycle front suspension includes a fork having a steering member mechanically connected or adapted to be connected to a handlebar of a motorcycle, and an oscillating arm having a first end and a second end. The motorcycle front suspension also includes a rod having a first end, pivotally joined to the steering member, and having a second end pivotally joined to the first end of the oscillating arm, and a shock absorber group, including a spring and a damper, the shock absorber group extending from an attachment head, mechanically connected to the steering member, to an attachment foot, pivotally joined to the second end of the oscillating arm.

First claim

The invention claimed is:

1. Motorcycle front suspension comprising:
a fork having a steering member mechanically connected or adapted to be connected to an handlebar of a motorcycle;
an oscillating arm having a first end and a second end;
a rod having a first end, pivotally joined to the steering member, and having a second end pivotally joined to the first end of the oscillating arm; and
a shock absorber group, comprising a spring and a damper, the shock absorber group extending from an attachment head, mechanically connected to the steering member, to an attachment foot, pivotally joined to the second end of the oscillating arm;
wherein the oscillating arm carries a rotation pin of an associable front wheel, the rotation pin defining a rotation axis (X-X) for the front wheel, and wherein the shock absorber group at the attachment foot is rotatably and slidingly coupled to the rotation pin.

2. The motorcycle front suspension according to claim 1 , wherein the first end portion of the oscillating arm is rotatably joined to said steering member at the attachment head.

3. The motorcycle front suspension according to claim 1 , wherein the rod is pivotally hinged or adapted to be pivotally hinged to the steering member through coupling means that define a hinge axis substantially parallel to the rotation axis (X-X).

4. The motorcycle front suspension according to claim 1 , wherein the damper comprises:
a first portion connected to the attachment head and a second portion connected to the attachment foot, wherein the first portion and the second portion are adapted to slide relative to each other; and
a third portion surrounded by the first portion and adapted to slide inside the second portion.

5. The motorcycle front suspension according to claim 4 , wherein the first portion is a jacket, the second portion is a lining, and the third portion is a stem.

6. The motorcycle front suspension according to claim 5 , wherein the damper comprises two bushings operatively interposed between the first portion and the second portion, and wherein the first and second portion are adapted to slide relative to each other on the bushings.

7. The motorcycle front suspension according to claim 6 , wherein the bushings are axially spaced apart one from the other so that a distance is defined between the two bushings.

8. The motorcycle front suspension according to claim 7 , wherein the distance varies during the mutual sliding between the first portion and the second portion.

9. The motorcycle front suspension according to claim 2 , wherein the rotation axis (X-X) is inclined with respect to a horizontal plane of a preset angle such that when the motorcycle front suspension supports at least part of a motorcycle weight, the rotation axis (X-X) is parallel to the horizontal plane.

10. The motorcycle front suspension according to claim 2 , wherein the steering member cantilevers with respect to the fork so that the associable front wheel longitudinal plane passes on the fork axis.

11. Motorcycle comprising at least one motorcycle front suspension according to claim 1 .

12. Motorcycle ( 1 ) The motorcycle according to claim 11 , wherein the motorcycle comprises a front mudguard, comprising two lateral walls and a top wall interposed between the lateral walls, wherein the two lateral walls and the top wall delimit an internal space of the front mudguard, and wherein the first end of the rod is housed within the internal pace.

13. Motorcycle ( 1 ) The motorcycle according to claim 11 , wherein the motorcycle is a scooter.

Assignees

• Piaggio & C Spa

Inventors

• Raffaelli Andrea

Classifications

• B60G2300/12

  Cycles; Motorcycles · CPC title

• B62K25/16

  for front wheel · CPC title

• B62K21/02

  Front wheel forks or equivalent, e.g. single tine · CPC title

• B62K25/08 Primary

  for front wheel · CPC title

• B60G2200/44

  steerable · CPC title