Patent Description:
In prior art, speed change devices of bicycle includes exposed speed change device and internal speed change device hidden in wheel hub. Controlling of the speed change device is executed by manual way or electric way.

In the known technology of current electric speed change device, related industries invest hard works in the field of electrical controlling of speed change device to develop an ideal product with high industrial utilization and economic benefits.

Prior speed change device has electrical controlling function, while these prior arts has disadvantages of complex structure, large amount of components, high costs, heavy volume and weights. Therefore these prior arts are not an ideal solution to satisfy the requirement of high industrial utilization and economic benefits.

As a result, there is an eager demand to have a novel structure with simple structure, less components, low costs, light weights, high industrial utilization and economic benefits.

<CIT> discloses an interior clutch-used control mechanism comprises a driving rod being installed on a center shaft of an internal clutch; a radial control cam ring and an axial control cam ring being installed on an outer side of the center shaft; a spacing ring being installed between the radial control cam ring and the axial control cam ring; a power rotation unit being installed with a sliding ring which is used as a linking device; a plurality of axial springs being installed between an outer side of the sliding ring and the rotation unit; and an interior of the sliding ring being installed with a plurality of pins and a plurality of radial spring; the radial control cam ring and the axial control cam ring being installed at an inner side of the sliding ring.

<CIT> discloses an interior clutch-used control mechanism comprises a driving rod being installed on a center shaft of an internal clutch; a control claw actuating seat and a rotation ring being installed at an outer side of the center shaft; the control claw actuating seat being positioned at a center of the rotation ring; an inner side of the rotation ring being installed with a plurality of upper planet power ratchet claws and lower planet power ratchet claws; a ratchet claw control panel being installed at an inner side of the upper and lower planet power ratchet claws; the ratchet claw control panel being installed with a plurality of left control claws and right control claws; and the left and right control claws being installed on the ratchet claw control panel and being driven by the ratchet claw control panel to rotate.

<CIT> discloses a hub for a human-powered vehicle, wherein the hub has a hub axle having a central axis. A hub main portion is arranged rotatably about the central axis. A rotatable structure is rotatably arranged relative to the hub axle to transmit a driving force to the hub main portion during rotation in a first rotational direction about the central axis. An electric motor is operatively coupled to the rotatable structure for selectively rotating the rotatable structure while the rotatable structure does not transmit rotation to the hub main portion.

Accordingly, the object of the present invention is to provide a control device of an internal speed change device of a wheel hub for clutching operation, wherein advantages of the present invention are that the present invention provides a control device of an internal speed change device of a wheel hub for clutching operation, which controls the moving of the lever by force of attraction or repulsion. The control device of the present invention also provides a simple structure, less components, low costs, light weights and high practicability. The present invention also has high safety, practicability, industrial utilization and economic benefits.

To achieve above object, the present invention provides a control device of an internal speed change device of a wheel hub for clutching operation as recited by claim <NUM>, and a control device of an internal speed change device of a wheel hub for clutching operation as recited by claim <NUM>. Preferred features are set out in the dependent claims.

In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope of the present invention defined in the appended claims.

The present invention provides a control device of an internal speed change device of a wheel hub for clutching operation. In application, the control device is installed in the internal speed change device of the wheel hub, which serves to control the clutching of the internal speed change device through axial moving of a lever. The axial moving of the lever is controlled by force of attraction or repulsion of the control device.

With reference to <FIG>, the structure of the first embodiment of the present invention is illustrated. <FIG> show the second embodiment of the present invention. <FIG> show the third embodiment of the present invention. <FIG> show the fourth embodiment of the present invention. <FIG> shows an assembly schematic view of the elements of the second to fourth embodiment of the present invention. All embodiments use common features to achieve special effects. The present invention comprises a rod <NUM>, a controlling claw sliding block <NUM>, a lever <NUM>, an electric sliding block <NUM>, a lever sleeve <NUM>, an electric bushing <NUM> and a controlling ring <NUM>. The lever <NUM> is installed on the rod <NUM>. The lever <NUM> is connected to a controlling claw sliding block <NUM>. The electric sliding block <NUM> is installed on a lever sleeve <NUM>. The lever sleeve <NUM> serves to receive a back end of the lever <NUM>. The back end of the lever <NUM> connects to the electric sliding block <NUM>. The electric bushing <NUM> is located at an outer side of the lever sleeve <NUM>. The controlling ring <NUM> is located at an outer side of the electric bushing <NUM>. Force of attraction or repulsion between the controlling ring <NUM> and the electric sliding block <NUM> drives the electric sliding block <NUM> to rotate or move axially so as to drive the lever <NUM> to move axially. Moving of the lever <NUM> drives the controlling claw sliding block <NUM> to control the clutching of an internal speed change device.

Referring to <FIG>, it shows the first embodiment of the present invention, wherein the electric sliding block <NUM> is rotatable by a swinging way. The rod <NUM> has a guiding groove <NUM> which extends along a direction of a center axis of the rod <NUM>. The lever <NUM> is installed in the guiding groove <NUM> of the rod <NUM>. The controlling claw sliding block <NUM> extends from a front end of the lever <NUM>. A back end of the lever <NUM> forms teethed strip <NUM>. At least one guiding notch <NUM> is formed at an inner side of the lever sleeve <NUM>. The back end of the lever <NUM> extends into one of the at least one guiding notch <NUM>. At least one installing hole <NUM> is formed on the lever sleeve <NUM> and the installing hole <NUM> connects the respective guiding notch <NUM>. The electric sliding block <NUM> is engaged to the teethed strip <NUM> of the lever <NUM>. The electric sliding block <NUM> is installed in one of the at least one installing hole <NUM>. Referring to <FIG>, the electric sliding block <NUM> has a teethed surface <NUM> engaged to the teethed strip <NUM> of the lever <NUM>. The electric sliding block <NUM> is installed with a second magnetic unit <NUM> which has an S pole and an N pole. The second magnetic unit <NUM> is a permanent magnet.

The controlling ring <NUM> surrounds an outer side of the lever sleeve <NUM>. The electric bushing <NUM> surrounds the outer side of the lever sleeve <NUM>. The controlling ring <NUM> surrounds an outer side of the electric bushing <NUM>. The controlling ring <NUM> is rotatable. The rod <NUM> pass through the lever sleeve <NUM>. An inner side of the controlling ring <NUM> is installed with a first magnetic unit <NUM> which has an S pole and an N pole. The first magnetic unit <NUM> is a permanent magnet or an electromagnet. An outer side of the controlling ring <NUM> is installed with a gear <NUM>. When the gear <NUM> is driven to rotate with a predetermined angle by an external force, the controlling ring <NUM> rotates synchronously with the predetermined angle. When the controlling ring <NUM> rotates to move the S pole or the N pole of the first magnetic unit <NUM> to a positon locating the electric sliding block <NUM>, a force of attraction or repulsion between the first magnetic unit <NUM> and the second magnetic unit <NUM> drives the electric sliding block <NUM> to move so that the N pole or the S pole of the second magnetic unit <NUM> attracts a respective one of the S pole and the N pole of the first magnetic unit <NUM>.

<FIG> shows the first embodiment of the present invention. When the controlling ring <NUM> rotates with the predetermined angle to rotate the S pole of the first magnetic unit <NUM> to a position locating the second magnetic unit <NUM> of the electric sliding block <NUM>, the electric sliding block <NUM> is driven to rotate counterclockwise by a force of attraction or repulsion between the S pole of the first magnetic unit <NUM> and the second magnetic unit <NUM> so as to drive the lever <NUM> to move backwards horizontally along an axial direction by the teethed surface <NUM> of the electric sliding block <NUM>.

Referring to <FIG>, when the controlling ring <NUM> rotates successively with the predetermined angle to rotate the N pole of the first magnetic unit <NUM> to a position locating the second magnetic unit <NUM> of the electric sliding block <NUM>, the electric sliding block <NUM> is driven to rotate clockwise by a force of attraction or repulsion between the N pole of the first magnetic unit <NUM> and the second magnetic unit <NUM> so as to drive the lever <NUM> to move forwards horizontally along an axial direction by the teethed surface <NUM> of the electric sliding block <NUM>.

Referring to <FIG>, <FIG>and <FIG>, it shows the second embodiment of the present invention, wherein the electric sliding block <NUM> is linear movable. In this embodiment, those elements identical to those in the first embodiment are illustrated by the same numerals and they have the same functions and effects. Therefore, the details will not be further described herein. Only the difference there between are described herein.

The second embodiment has a linear driving structure, wherein the controlling ring <NUM> has a unipolar magnetic structure and the electric sliding block <NUM> has a bipolar magnetic structure.

The lever <NUM> is installed on the rod <NUM>. The lever <NUM> is connected to a controlling claw sliding block <NUM>. The electric sliding block <NUM> is installed on a lever sleeve <NUM>. The lever sleeve <NUM> serves to receive a back end of the lever <NUM>. The back end of the lever <NUM> connects to the electric sliding block <NUM>. The electric bushing <NUM> is located at an outer side of the lever sleeve <NUM>. The controlling ring <NUM> is located at an outer side of the electric bushing <NUM>. Force of attraction or repulsion between the controlling ring <NUM> and the electric sliding block <NUM> drives the electric sliding block <NUM> to move axially to drive the lever <NUM> move axially. Moving of the lever <NUM> drives the controlling claw sliding block <NUM> to control the clutching of an internal speed change device.

Referring to <FIG>, the rod <NUM> has a guiding groove <NUM> which extends along a direction of a center axis of the rod <NUM>. The lever <NUM> is installed in the guiding groove <NUM> of the rod <NUM>. The controlling claw sliding block <NUM> extends from a front end of the lever <NUM>. At least one guiding notch <NUM> formed at an inner side of the lever sleeve <NUM>. The back end of the lever <NUM> extends into one of the at least one guiding notch <NUM>. At least one installing hole <NUM> is formed on the lever sleeve <NUM> and the installing hole <NUM> connects the respective guiding notch <NUM>. In the second embodiment, the electric sliding block <NUM> is fixed on the back end of the lever <NUM> and is located in the guiding notch <NUM> and one of the at least one installing hole <NUM>. An outer side of the at least one installing hole <NUM> is closed by a sleeve cover <NUM>.

When the controlling ring <NUM> rotates with the predetermined angle to rotate the S pole of the first magnetic unit <NUM> to a position locating the second magnetic unit <NUM> of the electric sliding block <NUM>, the electric sliding block <NUM> is driven to move backwards by a force of attraction or repulsion between the S pole of the first magnetic unit <NUM> and the second magnetic unit <NUM> so as to drive the lever <NUM> to move backwards horizontally along an axial direction.

Referring to <FIG>, when the controlling ring <NUM> rotates successively with the predetermined angle to rotate the N pole of the first magnetic unit <NUM> to a position locating the second magnetic unit <NUM> of the electric sliding block <NUM>, the electric sliding block <NUM> is driven to move forwards by a force of attraction or repulsion between the N pole of the first magnetic unit <NUM> and the second magnetic unit <NUM> so as to drive the lever <NUM> to move forwards horizontally along an axial direction.

Referring to <FIG>, <FIG>, it shows the third embodiment of the present invention, wherein the electric sliding block <NUM> is linear movable. In this embodiment, those elements identical to those in the first embodiment are illustrated by the same numerals and they have the same functions and effects. Therefore, the details will not be further described herein. Only the difference there between are described herein.

The third embodiment has a linear driving structure, wherein the controlling ring <NUM> has a bipolar magnetic structure and the electric sliding block <NUM> has a unipolar magnetic structure.

In this embodiment, when the controlling ring <NUM> rotates with the predetermined angle to rotate the N pole or the S pole of the first magnetic unit <NUM> to a position locating the second magnetic unit <NUM> of the electric sliding block <NUM>, the electric sliding block <NUM> is driven to move forwards or backwards by a force of attraction or repulsion between the first magnetic unit <NUM> and the second magnetic unit <NUM> so as to drive the lever <NUM> to move forwards or backwards horizontally along an axial direction.

Referring to <FIG>, <FIG>, it shows the fourth embodiment of the present invention, wherein the electric sliding block <NUM> is linear movable. In this embodiment, those elements identical to those in the first embodiment are illustrated by the same numerals and they have the same functions and effects. Therefore, the details will not be further described herein. Only the difference there between are described herein.

The fourth embodiment has a linear driving structure, wherein the controlling ring <NUM> has a bipolar magnetic structure and the electric sliding block <NUM> has a bipolar magnetic structure.

Therefore, in the first to fourth embodiments of the present invention, the axial moving of the lever <NUM> is caused by rotation or axial moving of the electric sliding block <NUM> which is driven by force of attraction or repulsion between the controlling ring <NUM> and the electric sliding block <NUM>. As a result, the lever <NUM> is driven to move forwards or backwards horizontally along an axial direction so as to drive the controlling claw sliding block <NUM> to control the clutching of an internal speed change device.

Claim 1:
A control device of an internal speed change device of a wheel hub for clutching operation comprising:
a rod (<NUM>);
a lever (<NUM>) installed on the rod (<NUM>); the lever (<NUM>) being connected to a controlling claw sliding block (<NUM>); the rod (<NUM>) having a guiding groove (<NUM>) which extends along a direction of a center axis of the rod (<NUM>); the lever (<NUM>) being installed in the guiding groove (<NUM>) of the rod (<NUM>) and being capable of moving forwards or backwards axially;
an electric sliding block (<NUM>) installed on a lever sleeve (<NUM>), the lever sleeve (<NUM>) serving to receive a back end of the lever (<NUM>); wherein a guiding notch (<NUM>) is formed at an inner side of the lever sleeve (<NUM>), the back end of the lever (<NUM>) extending into the guiding notch (<NUM>); the back end of the lever (<NUM>) forming a teethed strip (<NUM>); wherein an installing hole (<NUM>) is formed on the lever sleeve (<NUM>) and the installing hole (<NUM>) is connected to the guiding notch (<NUM>); the electric sliding block (<NUM>) being installed in the installing hole (<NUM>); the electric sliding block (<NUM>) having a teethed surface (<NUM>) engaged to the teethed strip (<NUM>) of the lever (<NUM>); the electric sliding block (<NUM>) being installed with a second magnetic unit (<NUM>);
an electric bushing (<NUM>) located at an outer side of the lever sleeve (<NUM>);
a controlling ring (<NUM>) located at an outer side of the electric bushing (<NUM>); an inner side of the controlling ring (<NUM>) being installed with a first magnetic unit (<NUM>); an outer side of the controlling ring (<NUM>) being installed with a gear (<NUM>); and
wherein the electric sliding block (<NUM>) is rotatable;
wherein the controlling ring (<NUM>), the electric sliding block (<NUM>), the lever (<NUM>) and the controlling claw sliding block (<NUM>) are configured such that, when the gear (<NUM>) is driven to rotate by an external force, the controlling ring (<NUM>) rotates synchronously, force of attraction or repulsion between the first magnetic unit (<NUM>) of the controlling ring (<NUM>) and the second magnetic unit (<NUM>) of the electric sliding block (<NUM>) drives the electric sliding block (<NUM>) to rotate so as to drive the lever (<NUM>) to move forwards or backwards axially, and moving of the lever (<NUM>) drives the controlling claw sliding block (<NUM>) to control clutching of the internal speed change device.