JP2007530345A5

JP2007530345A5 -

Info

Publication number: JP2007530345A5
Application number: JP2007504906A
Authority: JP
Filing date: 2005-03-10
Publication date: 2008-05-01

Claims

A two-stage suspension assembly, in which a driven wheel is rotatably mounted, for use in a main bicycle frame to which a pedal assembly is mounted, the driven wheel and the pedal assembly each having a fixed axis between each other. A rotating shaft having a distance, wherein the suspension assembly is pivotally attached to the main bicycle frame, and there is a flexible endless drive connection between the pedal assembly and the driven wheel;
The suspension assembly is
A first stage elastically coupled to the main frame to allow a first stage of a driven wheel stroke, wherein the driven wheel is between the driven wheel and the pedal assembly; A first stage that is capable of moving upward relative to the surface on which the driven wheel travels without substantially increasing the distance; and
A second stage that is elastically coupled to the main frame to enable a second stage of a driven wheel stroke and is pivotably coupled to the first stage, the driven wheel comprising: A further distance can be moved upwards relative to the surface on which the driven wheel rides, and thereby increasing the distance between the axis of rotation of the driven wheel and the pedal assembly The second stage,
Including
The first stage,
A swing arm having a wheel end and a frame end;
A support arm having a suspension end and a frame end;
A first shock absorber having a first end and a second end;
Including
The driven wheel is rotatably attached to the wheel end of the swing arm , and the suspension end of the support arm pivots to the swing arm with a first rotational center not adjacent to the frame end of the swing arm. The first end of the first shock absorber is attached to the support arm at a suspension end of the support arm, or is attached to the swing arm at a first rotational center; the frame end of the support arm, the second rotation mind pivotally mounted on said main frame adjacent said pedal assembly, said second end of said first shock absorber is not adjacent to the pedal assembly position Attached to the main frame,
The second stage includes a second shock absorber having first and second ends, said first end of said second damper device is attached to the frame end of the swing arm, and wherein The second end of the second shock absorber is pivotably attached to the second rotational center of the main frame so that the second shock absorber and the support arm share one rotation axis. And
When no pedaling force is applied to the pedal assembly, both the first stage and the second stage are active, and the second shock absorber generally retracts after the first shock absorber. When set and a pedaling force is applied to the pedal assembly, the first stage remains active, but due to the tension in the flexible connection between the driven wheel and the pedal assembly, The second stage is a suspension assembly that is substantially inactivated .

The assembly of claim 1 , wherein the first end of the first shock absorber is attached to the first rotating core.

Wherein the frame end of the swing arm, the first rotating center and the second rotation mind is V-shaped arrangement, in the arrangement, the second rotating mind to form the apex of the V-shape, claim The assembly according to 1 or 2 .

The assembly according to any one of claims 1 to 3 , wherein the spring constant of the first shock absorber is different from the spring constant of the second shock absorber.

The assembly according to any one of claims 1 to 3 , wherein the spring constant of the first shock absorber is the same as the spring constant of the second shock absorber.

The assembly according to any one of claims 1 to 5 , wherein the displacement provided by the first stage of the suspension assembly is less than the displacement provided by the second stage of the suspension assembly.

The assembly according to any one of claims 1 to 5 , wherein the displacement provided by the first stage of the suspension assembly is greater than the displacement provided by the second stage of the suspension assembly.

8. An assembly according to any one of the preceding claims , wherein an idler gear is provided on the support arm and the drive connection is engaged with the idler gear.

9. The assembly of claim 8, wherein the idle gear is disposed on the support arm between the first and second rotational centers.

A combination of a two-stage driven wheel suspension assembly, a bicycle frame and a drive assembly;
The suspension assembly comprises:
A swing arm having a wheel end and a frame end, to which a hub of a driven wheel is attached to the wheel end of the swing arm;
A support arm having a suspension end and a frame end , wherein the frame end of the support arm is pivotally attached to the bicycle frame by a rotation center of the support arm, and the suspension end of the support arm is connected to the wheel end A support arm that is pivotally attached to the swing arm at a rotational center of the swing arm that is not adjacent to the frame end of the swing arm ;
A first shock absorber having one end attached to the swing arm at the suspension end of the support arm or to the swing arm at the center of rotation of the swing arm and the other end attached to the bicycle frame;
One end is a rotation center of the support arm, the support arm and the second shock absorber are pivotably attached to the frame so as to share one rotation axis, and the other end is the frame end of the swing arm. A second shock absorber attached to the
Including
The drive assembly comprises:
A pedal-driven sprocket or pulley attached to the bicycle frame adjacent to a position where the frame end of the support arm is attached;
A passive sprocket or pulley that forms part of the hub of the driven wheel;
A flexible endless drive connection between the pedal-driven sprocket or pulley and the passive sprocket or pulley;
Means coupled to the pedal-driven and passive sprocket or pulley to allow loosening of the endless connection when the pedal-driven sprocket or pulley is not driven;
Including
With this combination, when the pedal drive sprocket or pulley is stopped during use, the support arm causes the first shock absorber to absorb the riding surface impact force on the driven wheel. In the second stage of turning on the frame in a direction of compression toward the frame and absorbing further riding surface impact force on the driven wheel, the swing arm is configured such that the frame end of the swing arm is Swiveling relative to the support arm to compress a second shock absorber toward the frame, the second shock absorber is generally set to retract after the first shock absorber;
When the pedal-driven sprocket or pulley is being driven and the riding surface impact force on the driven wheel is absorbed , the support arm compresses the first shock absorber toward the frame in the direction of the frame. The driving tension in the endless connection that is swiveled up and applied to the driven wheel hub extends in the direction to extend the second shock absorber away from the frame , or extends the second shock absorber. A combination in which the swing arm is pivoted with respect to the support arm in a direction that is generally kept in a state to substantially deactivate the buffer function of the second shock absorber .

The combination according to claim 10, wherein the one end of the first shock absorber is attached by a rotational center of the swing arm.

In the drive assembly, a motorcycle chain the endless connection is attached to the pedal drive sprocket and the driven sprocket, the combination according to claim 10 or 11.

The combination according to any one of claims 10 to 12 , wherein the spring constant of the first shock absorber is different from the spring constant of the second shock absorber.

The combination according to any one of claims 10 to 12 , wherein the spring constant of the first shock absorber is the same as the spring constant of the second shock absorber.

15. A combination according to any one of claims 10 to 14 , wherein the displacement provided by the first stage is less than the displacement provided by the second stage.

15. A combination according to any one of claims 10 to 14, wherein the displacement provided by the first stage is greater than the displacement provided by the second stage.

17. Combination according to any one of claims 10 to 16 , wherein an idler gear is provided on the support arm and the drive connection is engaged with the idler gear.

The combination according to claim 17, wherein the idle gear is disposed on the support arm between a rotation center of the swing arm and a rotation center of the support arm.