POSITIVE BOOM LATCH SYSTEM

摘要

PURPOSE: A positive boom latch system is provided to positively deal with movement of a boom toward not only front and rear but also right and left. CONSTITUTION: A swing body rotation unit(32) is formed on a swing body fixation unit(34). A boom latch(14) is fixed on the swing body rotation unit(32) by a support pin(22) to endure tension and compression in a boom(38). A counter wait(24) is formed on one end of the boom latch(14) and a boom holder pin(12) supporting the boom(38) is formed on the other side. A rotation pin(18) causing the rotation part of the boom latch(14) to move is formed on one side of the boom latch(14). Two wire rope fixation points(16) moving the rotation part of the boom latch(14) are formed on the upper side of the boom latch(14) at specific distance. A hydraulic cylinder(30) combined to the wire rope point(16) by a wire rope(20) is formed on one side of the swing body fixation unit(34). A limit switch(28) is formed on the swing body fixation unit(34) toward the hydraulic cylinder(30) and a limit switch(36) is formed on the lower part of the boom holder pin(12).