Connecting structure for double-arm crank and frame support of mine dumper

The invention discloses a connecting structure for a double-arm crank and a frame support of a mine dumper. The connecting structure comprises the double-arm crank and the frame support, wherein a round shaft installation hole is formed on the double-arm crank; a round shaft is matched in the round shaft installation hole; and the upper and lower ends of the round shaft pass through the frame support respectively and are limited by a limit structure. The connecting structure is characterized in that: a locking pin installation hole is formed on the side face of the round shaft installation hole and is provided with a locking pin in a matching way; the locking pin is pressed against the round shaft to form a locking structure; a U-shaped groove is formed on the pressed side of the round shaft; a bevel angle which is 6 to 9 degrees is formed on the pressed side of the locking pin and matched with the U-shaped groove; and the outer end of the locking pin is provided with a locking nut. The locking pin is pressed