Quick-release connection device

A quick-release connection device, comprising:

• a main load-bearing structural rod assembly;
• a safety pin;
• a cam handle;
• a spring piece;
• and
• a clamping piece;
• wherein the main load-bearing structural rod assembly has an elongated rod shape;
• and a free end of the main load-bearing structural rod assembly is provided with a pin hole;
• the safety pin is insertable into the pin hole;
• the cam handle is rotatably connected to an end of the main load-bearing structural rod assembly opposite to the free end;
• a first end of the spring piece is fixedly connected with the cam handle, and a second end of the spring piece is provided with an insertion hold, such that the spring piece is configured to be sleeved on the free end of the main load-bearing structural rod assembly, and to be limited by the safety pin to form a locking connection with the main load-bearing structural rod assembly;
• and
• a first end of the clamping piece is fixedly connected with the cam handle or the spring piece, and a second end of the clamping piece is provided with an opening communicated with outside such that the clamping piece is configured to be sleeved on the free end of the main load-bearing structural rod assembly, and to be limited by the spring piece to form a locking connection with the main load-bearing structural rod assembly.