Adjustment mechanism and drive
The present disclosure describes a gearshift mechanism for adjusting a gear ratio between a traction means, such as a chain, and a multi-sprocket gear set which can be rotated around an axle. The gearshift mechanism is configured to move the traction means in relation to the sprockets, such that an adjustment element is moved into the rolling motion of the traction means, thereby causing movement off of one sprocket and movement onto another sprocket.
1. A gearshift comprising:
a switch configured to co-rotate with a plurality of sprockets coupled to an axle, such that the switch and the sprockets rotate about a first rotational axis defined by the axle; and
an electrical control device configured to co-rotate about the first rotational axis along with the switch and the plurality of sprockets;
wherein the electrical control device is configured to control the switch to selectively divert a traction device from a first sprocket of the plurality of sprockets to a second sprocket of the plurality of sprockets.
2. The gearshift of claim 1 , wherein the switch is pivotable about a second axis of rotation radially spaced from the axle, such that the second axis of rotation is non-coplanar with the first axis of rotation.
3. The gearshift of claim 2 , wherein the switch comprises:
a switch body pivotable about the second axis of rotation,
a first switch segment extending from the switch body at a first position along the switch body, the first position being disposed radially outward of the first sprocket, relative to the axle, such that rotation of the switch about the second rotational axis enables the first switch segment to divert the traction device from the first sprocket; and
a second switch segment extending from the switch body at a second position along the switch body, the second position being disposed radially outward of the second sprocket, relative to the axle, such that rotation of the switch about the second rotation axis selectively enables the second switch segment to divert the traction device from the second sprocket.
4. The gearshift of claim 3 , wherein the switch is transitionable between a first position, wherein the first switch segment extends across the first sprocket to divert the traction device from the first sprocket, and a second position, wherein the second switch segment extends across the second sprocket to divert the traction device from the second sprocket.
5. The gearshift of claim 3 , wherein the switch and the plurality of sprockets are attached to a mounting tool rotatable about the axle, and the switch is rotatably attached to the mounting tool between the first and second sprockets.
6. The gearshift of claim 5 , wherein the first switch segment extends from the switch body in a first angular direction, the second switch segment extends from the switch body in a second angular direction, and an acute angle is defined between the first and second angular directions.
7. The gearshift of claim 1 , wherein the plurality of sprockets are part of a bicycle crankset.
8. A gearshift system comprising:
a shifter configured to shift a traction device between at least two sprockets rotatably mounted on an axle, wherein the shifter is pivotably attached to a mounting portion configured to rotate about a rotation axis defined by the axle; and
an electrical control device configured to rotate about the rotation axis along with the shifter;
wherein the electrical control device is configured to control the shifter to selectively pivot into a first path of the traction device, such that a first portion of the shifter diverts the traction device from a first one of the sprockets.
9. The gearshift system of claim 8 , wherein the shifter is configured to pivot about a pivot axis radially spaced from the rotational axis.
10. The gearshift system of claim 9 , wherein the electrical control device is further configured to control the shifter to selectively pivot into a second path of the traction device such that at least a second portion of the shifter diverts the traction device from the second one of the sprockets.
11. The gearshift system of claim 10 , wherein the first portion of the shifter extends from a body of the shifter at a first distance from the pivot axis, and the second portion of the shifter extends from the body of the shifter at a second distance from the pivot axis, the first distance being greater than the second distance.
12. The gearshift system of claim 10 , wherein the first portion of the shifter extends from a body of the shifter at a first angular position, and the second portion of the shifter extends from the body of the shifter at a second angular position oriented at an acute angle relative to the first angular position.
13. The gearshift system of claim 12 , wherein the second portion of the shifter extends transversely from the body of the shifter.
14. The gearshift system of claim 8 , wherein the at least two sprockets are attached to the mounting portion.
15. The gearshift system of claim 14 , wherein the shifter is disposed between the first one of the sprockets and a second one of the sprockets.
16. The gearshift system of claim 8 , wherein the traction device comprises a chain.
17. A gearshift system comprising:
a switch configured to co-rotate, along with at least a first sprocket and a second sprocket, about a rotation axis defined by an axle, the switch comprising:
a switch body; and
a first switch segment extending from the switch body; and
an electrical control device configured to control the switch to selectively shift a traction device between the first sprocket and the second sprocket, the electrical control device being configured to co-rotate along with the switch and the first and second sprockets.
18. The gearshift system of claim 17 , wherein the first end of the switch body is pivotably coupled to a mounting tool configured to rotate about the axle, and wherein controlling the switch to selectively shift the traction device includes selectively pivoting the switch in a first direction, such that the first switch segment diverts the traction device from the first sprocket.
19. The gearshift system of claim 18 , wherein the switch further comprises a second switch segment extending from the switch body, and wherein controlling the switch to selectively shift the traction device further includes selectively pivoting the switch in a second direction opposite the first direction, such that the second switch segment diverts the traction device from the second sprocket.
20. The gearshift system of claim 18 , wherein the first end of the switch body is pivotably coupled to the mounting tool such that the switch body is configured to pivot about a pivot axis radially spaced from the rotational axis.