Inter housing multi-speed transmission hub provided with a coaster brake

Claim 2

A wheel hub for a bicycle or the like provided with a coaster and a multi-speed transmission gear system, comprising: a. a hub shell having a fixed center shaft and defining a space about said center shaft, said shell being rotatably mounted relative to said shaft, and a first, a second, and a third bearing being provided in said space of the hub shell, b. a driving means mounted on said first bearing of said hub shell to be rotatable relative to said hub shell, and engaging said third bearing to be rotatable relative to said fixed shaft, the outer periphery of said driving means being provided with a sprocket wheel for receiving the driving power to be transmitted, c. a brake cone mounted on said second bearing of said hub shell and secured to said fixed shaft, d. an axially moveable multi-speed transmission gear system mounted between the driving means and the brake cone in the space of the hub shell, e. an actuating means mounted between said gear system and said driving means in the manner that it can transmit to said system the driving power of the driving means that rotates in the normal direction, whereas it pushes the system to move in the axial direction when the driving means rotates reversely, f. a means mounted between said actuating means and said driving means in the manner that it is rotated along with the normal rotation of the driving means so as to transmit the driving power thereof to the actuating means but it works the actuating means to move in the axial direction only when the driving means rotates reversely, g. brake shoes mounted between the brake cone and the end of said gear system facing the same in the manner that they are forced to contact with the inner wall of the hub shell along with said axial movement of the gear shifting mechanism, and h. a restoring resilient means for pressing the gear system against the actuating means thereby to release the pressed contact of said brake shoes.

Claim 3

A wheel hub for a bicycle or the like provided with a coaster brake and a multi-speed transmission gear system, comprising: a. a hub shell having a fixed center shaft and defining a space about said center shaft, said shell being rotatably mounted relative to said shaft, and a first, a second, and a third ball bearing race being provided in said space of the hub shell, b. a driving means mounted on said first ball bearing race of said hub shell to be rotatable relative to said hub shell, and engaging said third ball bearing race to be rotatable relative to said fixed shaft, the outer periphery of said driving means being provided with a sprocket wheel for receiving the driving power to be transmitted, c. a brake cone mounted on said second ball bearing race of said hub shell and secured to said fixed shaft, d. a sun gear mounted almost in the midway of the center shaft disposed in the space of the hub shell, e. a gear frame mounted midway between the driving means and the brake cone in the space of the hub shell and provided with a plurality of planetary gears and power transmitting pawls, said planetary gears engageable with said sun gear, and a ring gear provided with the pawls and the inside teeth engageable with said planetary gears, the gear frame and ring gear being arranged to move in the axial direction, f. actuating means mounted between said ring gear and said drIving means in the manner it can transmit to said ring gear or said gear frame the driving power of the driving means that rotates in the normal direction whereas it pushes the ring gear to move in the axial direction when the driving means rotates in the reverse direction, g. a means mounted between said actuating means and said driving means in the manner that it is rotated along with the normal rotation of the driving means so as to transmit the driving power thereof to the actuating means but it works the actuating means to move only in the axial direction when the driving means rotates in the reverse direction. h. brake shoes mounted between the brake cone and the end of the gear frame facing the same in the manner that they are forced to contact with the inner wall of the hub shell along with said axial movement of the gear frame, and i. a restoring resilient means for pressing the gear frame and the ring gear against the actuating means thereby to release the pressed contact of said brake shoes.

Claim 4

A wheel hub for a bicycle or the like provided with a coaster brake and a multi-speed transmission gear system, comprising: a. a hub shell having a fixed center shaft and defining a space about said center shaft, said shell being rotatably mounted relative to said shaft, and a first, a second, and a third ball bearing race being provided in said space of the hub shell, b. a driving means mounted on said first ball bearing race of said hub shell to be rotatable relative to said hub shell, and engaging said third ball bearing race to be rotatable relative to said fixed shaft, the outer periphery of said driving means being provided with a sprocket wheel for receiving the driving power to be transmitted, c. a brake cone mounted on said second ball bearing race of said hub shell and secured to said fixed shaft, d. a sun gear mounted almost in the midway of the center shaft disposed in the space of the hub shell, e. a gear frame mounted midway between the driving means and the brake cone in the space of the hub shell and provided with a plurality of planetary gears and power transmitting pawls, said planetary gears engageable with said sun gear, and a ring gear provided with the pawls and the inside teeth engageable with said planetary gears, the gear frame and ring gear being arranged to move in the axial direction, f. actuating means mounted between said ring gear and said drIving means in the manner it can transmit to said ring gear or said gear frame the driving power of the driving means that rotates in the normal direction whereas it pushes the ring gear to move in the axial direction when the driving means rotates in the reverse direction, g. a means mounted between said actuating means and said driving means in the manner that it is rotated along with the normal rotation of the driving means so as to transmit the driving power thereof to the actuating means but it works the actuating means to move only in the axial direction when the driving means rotates in the reverse direction. h. brake shoes mounted between the brake cone and the end of the gear frame facing the same in the manner that they are forced to contact with the inner wall of the hub shell along with said axial movement of the gear frame, and i. a restoring resilient means for pressing the gear frame and the ring gear against the actuating means thereby to release the pressed contact of said brake shoes.

Claim 5

A wheel hub as defined in claim 1 wherein the foremost end of the driving means disposed in the hub shell is provided with a face for transmitting the driving power to the actuating means and an inclined face for not transmitting this power to the actuating means when the driving means rotates in the normal direction; said actuating means facing the driving means being provided in its one end with a driving power receiving face and an inclined face which respectively have the same shapes as, and are engageable with the driving power transmitting face and the inclined face of the driving means so that, when this means rotates reversely, said inclined face thereof can slidably move along said inclined face of the actuating means thereby to move the latter in the axial direction.

Claim 6

A wheel hub as defined in claim 1 wherein the foremost end of the driving means disposed in the hub shell is provided with a male screw while the foremost end of the actuating means facing said driving means is provided with a female screw corresponding to said male screw so that, when the driving means rotates in the normal direction, said male screw and said female screw are engaged with each other thereby to transmit the driving power of the driving means to the actuating means, whereas when the driving means rotates reversely, said two screws are helically moved thereby to move the actuating means in the axial direction.

Claim 7

A gear shifting mechanism mounted in the space of the hub shell of said wheel hub as defined in claim 1, comprising a sun gear mounted in the outer periphery of the shaft, a plurality of planetary gears engageable with said sun gear, a gear frame for holding said planetary gears moveably in the axial direction, first pawls mounted in said gear frame and engageable with a ratchet mounted in the inner wall of the hub shell, a ring gear provided with inside teeth engageable with said planetary gears, arranged to be engaged with said gear frame in the axial direction and disposed in contact with one end of the actuating means so that it can move along with the movement of the actuating means, second pawls engageable with another ratchet mounted in the inner wall of the hub shell, a control means for controlling said second pawls, mounted to be detachable of said gear frame and engageable with the actuating means thereby to move in the axial direction into which the driving power is transmitted from the actuating means, and a push rod having a gear shifting key for moving said control means, wherein when the actuating means has been axially moved by the reverse rotation of the driving means, the ring gear and the gear frame are moved in the axial direction without being rotated along with the driving means.

Claim 8

A wheel hub as defined in claim 2 wherein a plate is mounted on one end of said gear frame thereby to hold one end of a spring for pressing said gear frame and said ring gear against the actuating means.

Claim 9

A wheel hub as defined in claiM 6 wherein said plate is mounted to move with the end of said gear frame.