Brake for shearing machine

The utility model relates to a shearer stopper, which is to insert a joint sleeve which passes through the through hole of a cylinder piston, an adjustment seat, a gear board and a friction plate on the basis of the existing stopper; the joint sleeve is tightly matched with the gear board and the end in the stopper has an edge which bulges outside and is blocked on the gear board and the friction plate; the top of the joint sleeve does not extend out of the friction plate; an annular groove is arranged on the external ring surface of the joint sleeve out of the brake and one side is flush with the end face of the cylinder piston. Two half ring-shaped panels are inserted in the groove; the panel and an annular pressure plate sleeved on the external ring surface of the joint sleeve are connected together by a fastener which passes through the corresponding through holes; only six stay bolts are positioned between the air cylinder piston and the gear board; a location piece which is connected with the gear board through the rest bolt hole by threaded connection and the distance between the top plane and the adjustment seat is the moving stroke of the piston of the air cylinder. The utility model completely eliminates the hidden trouble of closedown caused by failure, and can improve the production efficiency of the shearing and cutting procedure and can reduce the cost. 一种剪切机制动器，它是在现有制动器的基础上增设一个插在气缸活塞、调整座、齿轮板及摩擦板中心通孔的连接套，其与齿轮板过盈配合且位于制动器内的一端设向外凸并卡在齿轮板和摩擦板上的边沿，其端顶不超出摩擦板，该连接套位于制动器外的外环面上设有环形凹槽，且其一个侧边与气缸活塞端面平齐。两个半环形嵌板插在该凹槽内，该嵌板与套在连接套外环面上的环形压板由穿过它们对应通孔的紧固件固定在一起，气缸活塞与齿轮板之间只设6根拉杆螺栓，齿轮板上余下的螺孔中设有与其螺纹连接且顶部平面到调整座之间的距离为气缸活塞移动行程的定位块。本实用新型彻底地消除了故障停机的隐患，使剪切下料工序生产效率高、成本低。