A hub with disengaging effect of ratchet faces in an idle mode, the hub A comprises:
- a mandrel in the fixed state;
- a hub, screwed in the mandrel, and with a driven end in the axial direction;
- a gear barrel is screwed in the mandrel and is located at the axial interval of the driven end of the hub;
- the outer periphery of the gear barrel has a gear sleeve, and the gear barrel is concave corresponding to one end of the driven end of the hub to form a first housing part and a second housing part in sequence, and the gear barrel is operated in three modes with respect to the hub, including forward rotation, reverse rotation, and non-rotation;
- a ratchet disc is fixed in the driven end of the hub in a synchronous rotational relationship with the hub, the ratchet disc has a first annular ratchet face corresponding to the gear barrel, the first annular ratchet face includes a plurality of first single oblique tooth rim;
- a double-sided free toothed disc is mounted in the first housing part of the gear barrel, the double-sided free toothed disc is in a circumferentially synchronous relationship with the gear barrel, and the double-sided free toothed disc is selectively pushed along the axial displacement of the gear barrel, the double-sided free toothed disc includes a second annular ratchet surface and a pushed face, the second annular ratchet surface includes a plurality of second single oblique tooth rims, the second single oblique tooth rim is in a single steering engagement relationship with the first single oblique tooth rim of the first annular ratchet surface;
- an elastic expansion member is disposed between the ratchet disc and the double-sided free toothed disc to elastically push the double-sided free toothed disc away from the ratchet disc, the gear barrel is in the fixed mode, the first annular ratchet surface and the second annular ratchet surface are disengaged from each other;
- a repulsion disc is mounted in the second housing part of the gear barrel, the repulsion disc is in a limit positioning state at the circumferential direction with respect to the mandrel, and the outer circumference of the repulsion disc and the second housing part of the gear barrel are kept with a gap and not connected, and the repulsion disc has a withstanding face;
- an axial repulsion part includes a first repulsion part and a second repulsion part, wherein the first repulsion part is disposed in the pushed face of the double-sided free toothed disc, and the second repulsion part is disposed in the withstanding face of the repulsion disc;
- when the gear barrel is in the forward rotation mode and the double-sided free toothed disc is rotated relative to the repulsion disc, an axial mutual pushing force is generated between the first repulsion part and the second repulsion part, thereby the double-sided free toothed disc is pushed toward the ratchet disc to engage the second annular ratchet surface with the first annular ratchet surface.