Transmission mechanism and bicycle

A transmission mechanism, comprising:

• a main shaft;
• a power input member;
• a gear component, arranged on the main shaft;
• and
• a one-way transmission component, sleeved on the main shaft, connected with the power input member and the gear component, and configured to enable the gear component to perform one-way transmission under an action of the power input member,
• wherein the gear component is connected with a power output member in a transmission way to change a rotation speed transmitted from the power input member to the power output member;
• and
• the power input member performs reciprocating motion with the main shaft as an axis to drive the power output member to move;
• the one-way transmission component is a ratchet component;
• the gear component is a planetary gear component, the main shaft further comprises a shaft sleeve, the shaft sleeve is connected with the one-way transmission component, and the planetary gear component comprises:
• a first planetary carrier, fixedly connected with the shaft sleeve;
• a first planetary gear set, arranged on the first planetary carrier;
• a gear ring, meshed with the first planetary gear set;
• and
• a first solar gear, passing through the main shaft to be connected with the first planetary gear set in a transmission way, and connected with the power output member in a transmission way;
• wherein the ratchet component comprises a ratchet, a pawl plate, a butting piece and a pawl, the pawl is arranged on the pawl plate, the pawl is meshed with the ratchet, the pawl plate is fixedly connected with the power input member, and the ratchet is fixedly connected with the first planetary carrier;
• the butting piece is fixed on the gear ring, and the pawl is pressed down by the butting piece to disengage from meshing with ratchet teeth when rotating to the butting piece, such that the ratchet is rotatable freely;
• wherein the transmission mechanism configured to reverse;
• the power input member rotates to drive the pawl on the plate of the pawl to rotate;
• the pawl is pressed down by the butting piece to disengage from meshing with ratchet teeth when rotating to the butting piece, such that the ratchet is rotatable freely, and the power output member is rotatable freely;
• when meshing is needed again, the power input member is rotated to drive the pawl on the plate of the pawl to rotate, such that the pawl is disengaged from abutment with the butting piece, and the pawl resumes the meshing with the ratchet teeth.