Bicycle drive unit and bicycle drive system including bicycle drive unit

Patent metadata

Field	Value
Publication number	US-11059543-B2
Application number	US-201715838490-A
Country	US
Kind code	B2
Filing date	Dec 12, 2017
Priority date	Dec 26, 2016
Publication date	Jul 13, 2021
Grant date	Jul 13, 2021

Abstract

A bicycle drive unit includes a motor that assists propulsion of a bicycle and a wire operation device that operates a wire, which is connectable to a bicycle component.

First claim

What is claimed is:

1. A bicycle drive unit comprising:
a housing;
a crankshaft rotatably supported by the housing with bearings, axial ends of the crankshaft being configured for crank arms of a bicycle to be coupled thereto;
a motor that is supported by the housing and configured to assist propulsion of the bicycle, at least a portion of the motor being accommodated inside the housing;
an output portion arranged to be driven by the motor, the output portion being configured to be coupled to a crank of the bicycle, the output portion being disposed coaxially with respect to the crankshaft; and
a wire operation device that includes an electric actuator different from the motor, the wire operation device being accommodated inside the housing and configured to actuate the electric actuator to operate a wire that is connectable to a bicycle component,
the housing including a hole configured and arranged for the wire to extend out of the housing through the hole.

2. The bicycle drive unit according to claim 1 , wherein
the wire operation device includes a wire connection portion that is connectable to the wire and rotated to operate the wire.

3. The bicycle drive unit according to claim 1 , wherein
the wire operation device includes a wire connection portion that is connectable to the wire and moved in a predetermined direction to operate the wire.

4. The bicycle drive unit according to claim 1 , further comprising
a guide that guides the wire and is provided inside the housing.

5. The bicycle drive unit according to claim 4 , wherein
the guide is one of a plurality of guides.

6. The bicycle drive unit according to claim 4 , wherein
the guide includes a groove provided on the housing.

7. The bicycle drive unit according to claim 4 , wherein
the guide includes a roller that is rotatable relative to the housing.

8. The bicycle drive unit according to claim 4 , wherein
the guide is arranged to guide the wire between the wire operating device and the hole, the guide including a pair of parallel elongated protrusions and a groove defined between the elongated protrusions, the groove being configured to accommodate the wire.

9. The bicycle drive unit according to claim 1 , wherein
the housing includes a frame connection portion that is connectable to a frame of the bicycle.

10. The bicycle drive unit according to claim 1 , wherein
the housing is configured to support a crankshaft of the bicycle.

11. The bicycle drive unit according to claim 10 , wherein
in a state in which the housing is provided on the bicycle, a wire connection portion of the wire operation device is located at a position separated from a center of the frame of the bicycle in a direction in which the crankshaft of the bicycle extends.

12. The drive unit according to claim 1 , further comprising
a detector that detects movement of the wire.

13. The bicycle drive unit according to claim 1 , further comprising
an electronic controller that controls the wire operation device.

14. The bicycle drive unit according to claim 13 , wherein
the electronic controller is configured to control the motor.

15. The bicycle drive unit according to claim 13 , further comprising
a communication unit that is configured to communicate with at least one of an operation device that is operable by a rider and a sensor that detects a condition of the bicycle, the electronic controller being configured to control the wire operation device in accordance with information input to the communication unit.

16. The bicycle drive unit according to claim 15 , wherein
the communication unit is configured to communicate with the at least one of the operation device and the sensor through wireless connection.

17. The bicycle drive unit according to claim 13 , further comprising
a memory device that stores information related to a movement amount of the wire that is required to perform a predetermined action with the bicycle component, and the electronic controller is configured to change the information related to the movement amount of the wire stored in the memory device in accordance with an operation of an external device.

18. The bicycle drive unit according to claim 13 , wherein
the electronic controller is configured to control the wire operation device to move the wire over a first movement amount in one of a first direction and a second direction that is opposite to the first direction, and the electronic controller is then configured to control the wire operation device to move the wire over a second movement amount, which is less than the first movement, in the other one of the first direction and the second direction.

19. The bicycle drive unit according to claim 13 , wherein
the electronic controller is configured control the wire operation device to move the wire over a first movement amount in one of a first direction and a second direction that is opposite to the first direction, and the electronic controller is then configured to control the wire operation device to move the wire over a second movement amount in the one of the first direction and the second direction.

20. A bicycle drive system comprising a bicycle drive unit according to claim 1 ; and further comprising
the wire, and the bicycle component, the bicycle component including at least one of a shifting device, a seatpost assembly, a suspension, and a brake device.

21. The bicycle drive unit according to claim 1 , further comprising:
an attachment portion provided inside the housing, the attachment portion being configured for the wire operation device to be attachable thereto by at least one bolt.

22. The bicycle drive unit according to claim 21 , wherein
the attachment portion including at least one hole that is threaded and configured to receive the bolt.

23. A bicycle drive unit comprising:
a motor configured to assist propulsion of a bicycle;
a housing that supports the motor and in which at least a portion of the motor is accommodated;
a wire operation device configured to operate a wire that is connectable to a bicycle component, the wire operation device comprising a wire connection portion, an electric actuator, and a support that supports the wire connection portion and the electric actuator, the wire connection portion being rotatably supported by the support and the electric actuator being arranged to transmit a torque to rotate the wire connection portion; and
an attachment portion provided on the housing, the attachment portion being configured for the wire operation device to be attachable thereto by a plurality of bolts, and the attachment portion including a plurality of holes through which the plurality of bolts are inserted.

24. The bicycle drive unit according to claim 23 , wherein
the wire operation device is disposed outside the housing.

25. A bicycle drive unit comprising:
a motor configured to assist propulsion of a bicycle;
a housing that supports the motor and in which at least a portion of the motor is accommodated;
a wire operating device provided on the housing, the wire operating device being configured to operate an inner wire of a Bowden cable;
a holder provided on the housing, the holder being configured to hold an end of an outer cable of the Bowden cable, the holder having a through hole including a first hole and a second hole, the first hole having an inner diameter into which the outer cable is insertable and th

Assignees

• Shimano Kk

Inventors

• Ichida Tadashi
• Shahana Satoshi
• Fujii Kazuhiro
• Takeda Kazuhiro

Classifications

• B62J43/13

  on rider-propelled cycles with additional electric propulsion · CPC title

• B62J45/20

  Cycle computers as cycle accessories · CPC title

• F16C1/26

  Construction of guiding-sheathings or guiding-tubes · CPC title

• B62K23/02

  hand actuated (arrangements of controls on handle-bars of engine-driven cycles B62K11/14) · CPC title

• B62M6/55

  power-driven at crank shafts parts · CPC title