Directional transmission mechanism, directional sprocket apparatus and pedal device

A directional sprocket apparatus, comprising:

• a directional transmission mechanism comprising:
• a driving shaft;
• an output shaft;
• a co-rotating wheel set connected with the driving shaft and the output shaft and configured to drive the output shaft to rotate in a direction that is the same as that of the driving shaft;
• a reverse-rotating wheel set connected with the driving shaft and the output shaft and configured to drive the output shaft to rotate in a direction opposite to that of the driving shaft;
• and
• a switching mechanism configured to switch the driving shaft to drive the co-rotating wheel set or drive the reverse-rotating wheel set to rotate, so as to enable the output shaft to rotate directionally, wherein the switching mechanism includes first meshing teeth configured to drive the reverse-rotating wheel set to rotate, second meshing teeth configured to drive the co-rotating wheel set to rotate, and a sliding member configured to be fittingly connected with the first meshing teeth or the second meshing teeth, and wherein both the first meshing teeth and the second meshing teeth are ratchet teeth, and a ratchet orientation of the first meshing teeth is opposite to a ratchet orientation of the second meshing teeth;
• the sliding member is slidably mounted on the driving shaft, one end of the sliding member has a toothed configuration for meshing with the first meshing teeth, another end of the sliding member has a toothed configuration for meshing with the second meshing teeth, and the driving shaft is provided thereon with a sliding groove for guiding the sliding member to slide back and forth between the first meshing teeth and the second meshing teeth;
• a slave transmission wheel configured to drive the driving shaft of the directional transmission mechanism to rotate;
• a master transmission wheel configured to drive the slave transmission wheel to rotate;
• a transmission shaft supporting the master transmission wheel;
• and
• an output wheel connected with the output shaft.

A pedal device comprising:

• a frame;
• a directional sprocket apparatus comprising:
• a directional transmission mechanism comprising:
• a driving shaft;
• an output shaft;
• a co-rotating wheel set connected with the driving shaft and the output shaft and configured to drive the output shaft to rotate in a direction that is the same as that of the driving shaft;
• a reverse-rotating wheel set connected with the driving shaft and the output shaft and configured to drive the output shaft to rotate in a direction opposite to that of the driving shaft;
• and
• a switching mechanism configured to switch the driving shaft to drive the co-rotating wheel set or drive the reverse-rotating wheel set to rotate, so as to enable the output shaft to rotate directionally, wherein the switching mechanism includes first meshing teeth configured to drive the reverse-rotating wheel set to rotate, second meshing teeth configured to drive the co-rotating wheel set to rotate, and a sliding member configured to be fittingly connected with the first meshing teeth or the second meshing teeth, and wherein both the first meshing teeth and the second meshing teeth are ratchet teeth, and a ratchet orientation of the first meshing teeth is opposite to a ratchet orientation of the second meshing teeth;
• the sliding member is slidably mounted on the driving shaft, one end of the sliding member has a toothed configuration for meshing with the first meshing teeth, another end of the sliding member has a toothed configuration for meshing with the second meshing teeth, and the driving shaft is provided thereon with a sliding groove for guiding the sliding member to slide back and forth between the first meshing teeth and the second meshing teeth;
• a slave transmission wheel configured to drive the driving shaft of the directional transmission mechanism to rotate;
• a master transmission wheel configured to drive the slave transmission wheel to rotate;
• a transmission shaft supporting the master transmission wheel;
• and
• an output wheel connected with the output shaft;
• and
• a foot pedal configured to drive the transmission shaft of the directional sprocket apparatus to rotate, the transmission shaft being mounted on the frame.