Trailer connecting mechanism and trailer

A trailer connecting mechanism, comprising:

• a first connecting assembly, a connecting member movably connected to the first connecting assembly, and a second connecting assembly connected to the connecting member;
• the first connecting assembly is constructed to be further connected to a trailer, and the second connecting assembly is constructed to be further connected to a power-assisted vehicle;
• and the second connecting assembly is adjustably arranged relative to the connecting member;
• wherein the second connecting assembly comprises:
• a quick-lock member, a threaded rod fixedly connected to the quick-lock member, and a fixing base connected to the threaded rod in a sleeved manner, wherein the threaded rod may be adjustably fixed at any position relative to the fixing base;
• and
• wherein the fixing base comprises:
• an outer sleeve sleeved on the threaded rod, an outer nut located outside the outer sleeve and threadedly connected to the threaded rod, an inner sleeve sleeved on the threaded rod, and an inner nut located inside the inner sleeve and threadedly connected to the threaded rod.

A trailer connecting mechanism, comprising:

• a first connecting assembly, a connecting member movably connected to the first connecting assembly, and a second connecting assembly connected to the connecting member;
• the first connecting assembly is constructed to be further connected to a trailer, and the second connecting assembly is constructed to be further connected to a power-assisted vehicle;
• the second connecting assembly is adjustably arranged relative to the connecting member;
• the second connecting assembly comprises:
• a quick-lock member, the quick-lock member comprises:
• a clamping block to be hingedly opened and closed and a screw rod that penetrates through the clamping block;
• and
• the clamping block comprises a front clamping plate, a rear clamping plate, and a rotating shaft, wherein one end of the front clamping plate is hinged to one end of the rear clamping plate through the rotating shaft, a plurality of through holes are formed at hinge positions of the front clamping plate or the rear clamping plate, the rotating shaft is adjustably inserted into a through hole of the plurality of through holes, a waist-shaped hole is further formed at opening-closing ends of the front clamping plate and the rear clamping plate, and the screw rod is adjustably connected to the waist-shaped hole.