Customized Semi Trailer Lock Towing Bolted King Semi-Trailer King Pin Hot

Product Description


Main National Standard Classifications
Type 50 (2 inch, Φ50.8 mm): For general standard-load semi-trailers, complying with GB/T 4606-2006 (IDT ISO 337); globally interchangeable with all fifth wheel couplings.
Type 90 (3.5 inch, Φ90 mm): For heavy-duty oversized cargo and heavy transport vehicles, complying with GB/T 4607-2006 (IDT ISO 4086); globally interchangeable with all fifth wheel couplings.
Material & Strength Standards
High-quality steel is adopted as raw material. Steel grades vary per customer requirements, including 45# steel, 40Cr, 20CrMnTi, Q235 and 20CrMo. All materials undergo dedicated processing procedures to improve impact resistance and wear resistance.

Product Features

Dual Functions: Bear vertical loads at the front of the trailer while acting as the articulated pivot for steering.

Fast Assembly & Disassembly: Complete trailer coupling and separation within one minute when matched with fifth wheel locks.

Limiting & Locking Structure: Prevents pin disengagement and trailer separation during driving for superior road safety.

Allows large left-right steering angles of the tractor, adapting to curve navigation and reversing operations.
 

Core Functions

Load Bearing & Transfer: Bear all vertical loads at the front of the semi-trailer and transmit cargo weight to the tractor frame.

Articulated Steering: Serve as the pivot of the whole vehicle; the tractor swings left and right around the pin to complete turning.

Locked Connection: Realize quick coupling and uncoupling with fifth wheel locking jaws to prevent accidental separation during travel.
 

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