US 12,691,973 B2Granted

Automatic internal transmission and bicycle

AssigneeGuangdong Lofandi Intelligent Technology Co., Ltd

InventorsJichu Li, Jiehuang Lin

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Abstract

An automatic internal transmission and a bicycle are provided. The automatic internal transmission includes a hub shaft, an input mechanism, an output mechanism, a transmission mechanism having a first planetary gear train and a second planetary gear train, and an automatic shifting control mechanism having a clutch control unit and a centrifugal block being connected to the output mechanism and the clutch control unit. The centrifugal block can rotate relative to the output mechanism to a first state in a first direction, to drive the clutch control unit to rotate, so that a driving force is transmitted via the first planetary gear train. The centrifugal block can further rotate relative to the output mechanism to a second state in the first direction, to drive the clutch control unit to further rotate, so that the driving force is transmitted via the second planetary gear train.

Claims20

Dependent claims

An automatic internal transmission, comprising a hub shaft, an input mechanism, an output mechanism, a transmission mechanism and an automatic shift control mechanism, wherein

the input mechanism and the output mechanism are both rotatably mounted to the hub shaft, and the input mechanism is configured to provide a driving force to drive the output mechanism to rotate;
the transmission mechanism is mounted to the hub shaft, and is located between the input mechanism and the output mechanism;
wherein
the transmission mechanism at least comprises a first planetary gear train and a second planetary gear train;
the automatic shift control mechanism comprises a centrifugal block and a clutch control unit, the centrifugal block is rotatably connected to the output mechanism, and the centrifugal block is connected to the clutch control unit;
the centrifugal block is configured to rotate with respect to the output mechanism along a first direction to a first state, to drive the clutch control unit to rotate, to make the driving force transmitted by the input mechanism be transmitted to the output mechanism via the first planetary gear train;
and
the centrifugal block is configured to further rotate with respect to the output mechanism along the first direction to a second state, to drive the clutch control unit to further rotate, to make the driving force transmitted by the input mechanism be transmitted to the output mechanism via the second planetary gear train;
and wherein
the clutch control unit comprises a clutch controller, a synchronization ring and a control sleeve, wherein the centrifugal block is connected to the synchronization ring, the control sleeve is connected to the synchronization ring, the clutch controller is located between the transmission mechanism and the output mechanism, and the centrifugal block is configured to drive the synchronization ring to rotate, so as to drive the control sleeve to rotate to control the clutch controller.

7 more elements

An automatic internal transmission, comprising a hub shaft, an input mechanism, an output mechanism, a transmission mechanism and an automatic shift control mechanism, wherein

the input mechanism and the output mechanism are both rotatably mounted to the hub shaft, and the input mechanism is configured to provide a driving force to drive the output mechanism to rotate;
the transmission mechanism is mounted to the hub shaft, and is located between the input mechanism and the output mechanism;
wherein
the transmission mechanism at least comprises a first planetary gear train and a second planetary gear train;
the automatic shift control mechanism comprises a centrifugal block and a clutch control unit, the centrifugal block is rotatably connected to the output mechanism, and the centrifugal block is connected to the clutch control unit;
the centrifugal block is configured to rotate with respect to the output mechanism along a first direction to a first state, to drive the clutch control unit to rotate, to make the driving force transmitted by the input mechanism be transmitted to the output mechanism via the first planetary gear train;
and
the centrifugal block is configured to further rotate with respect to the output mechanism along the first direction to a second state, to drive the clutch control unit to further rotate, to make the driving force transmitted by the input mechanism be transmitted to the output mechanism via the second planetary gear train;
and wherein
the clutch control unit comprises a clutch controller and a control sleeve, the clutch controller comprises a hub bush, a first pawl and a second pawl, the hub bush is connected to the output mechanism, and the first pawl and the second pawl are each rotatably connected to the hub bush;
pawl mounting grooves are provided in an inner surface of the hub bush, and the first pawl and the second pawl are mounted in the pawl mounting grooves respectively;
wherein
in the first state, the control sleeve is configured to control the first pawl to be combined with the first planetary gear train;
and
in the second state, the control sleeve is configured to control the second pawl to be combined with the second planetary gear train.

12 more elements

Dependencies are inferred from the claim text.