A buffer type speed difference falling protector, comprising:
- a shell (1) which is provided with an opening (10);
- a frame body (2) which is arranged in the shell (1);
- a winding device (3) which is arranged on the frame body (2), wherein a rope body can be wound when the winding device (3) rotates in a forward direction, and the rope body is released when the winding device (3) rotates in a reverse direction;
- an elastic resetting piece (4) which is used for driving the winding device (3) to rotate in the forward direction;
- a braking device (5) which is arranged on the frame body (2) and comprises a locking seat (51) with a plurality of ratchets (510), a fixing piece (52) capable of rotating synchronously with the winding device (4), a plurality of pawls (53) rotationally arranged on the fixing piece (52) and elastic pieces (54) connected with the pawls (53), wherein when the fixing piece (52) rotates to enable the centrifugal force generated by the pawls (53) to be larger than the elastic force of the elastic pieces (54), the pawls (53) are meshed with the ratchets (50) to brake the winding device (3);
- and
- a braking piece (312) which is matched with the winding device (3) through a multi-thread structure, wherein the braking piece (312) rotates synchronously with the winding device (3) and is tightly attached to the braking device;
- wherein a ratchet groove (511) allowing each pawl to be inserted is formed between every two adjacent ratchets (510), each pawl (53) is provided with a cantilever section (531) extending in the direction away from the rotating center of the pawl (53), each cantilever section (531) is provided with a first side edge (5311) and a second side edge (5312), and a plane perpendicular to the axis of a fixing piece (52) serves as a reference plane;
- the end, away from the rotating center of the corresponding pawl (53), of each cantilever section (531) is provided with a tip (532) capable of being clamped into the corresponding ratchet groove (511), each tip (532) is provided with a first cut edge (5321) connected with the corresponding first side edge (5311), and the included angle between the projection of each first cut edge (5321) on the reference plane and the projection of each first side edge (5311) on the reference plane is set to be β1;
- the inner wall of each ratchet groove (511) is of a polygonal structure, a first guide edge (5111), a second guide edge (5112), a third guide edge (5113) and a flange (5114) are sequentially arranged on each ratchet groove (511) in the reverse rotating direction of the fixing piece, and each ratchet (510) is composed of the flange (5114) and the first guide edge (5111) of the adjacent ratchet groove (511);
- the included angle between the projection of each first guide edge (5111) on the reference plane and the projection of each second guide edge (5112) on the reference plane is set to be β2, the included angle between the projection of each second guide edge (5112) on the reference plane and the projection of each third guide edge (5113) on the reference plane is set to be β3, wherein 90°<β1<β2<β3.