The invention relates to an automatic windproof braking device of a portal crane, which solves the problem that a bearing wheel needs to be manually locked, the inner side of the bearing wheel is fixedly connected with one side of an inner gear ring, and a pressure spring and a piston rod are arranged at two symmetrical ends of a U-shaped shell; the upper end of the push-pull rod is hinged to the upper end of the supporting plate through a second hinge shaft, the other end of the tension spring is connected with one end of the pull rod, and the other end of the pull rod is hinged to the lower end of the push-pull rod through a third hinge shaft. The short edge of the rectangular frame is fixedly connected with one diameter of the same-diameter cylinder of the symmetrical hemispherical piston, the same-diameter cylinder of the hemispherical piston is in movable fit with the middle of the U-shaped shell, and the middle of the U-shaped shell is provided with a left vent hole and a right vent hole which are in sealing fit with the outer wall of the long edge of the rectangular frame. The rectangular frame moves left and right in the U-shaped shell, air is continuously inflated into the two sides of the cavity of the U-shaped shell, and the bearing wheels cannot be clamped when the push-pull rod is lifted. When the machine is stopped, air does not enter the machine any more, the pressure release valve continuously exhausts air under the action of the pressure spring, and the push-pull rod clamps the bearing wheel.
本发明为门式起重机自动防风制动装置,解决承重轮需人工锁定的问题,承重轮的内侧与内齿圈的一侧固定连接,凵形外壳的对称两端有压力弹簧和活塞杆,活塞杆通过第1铰轴与弧形推拉杆铰接,推拉杆的上端通过第2铰轴与支撑板的上端铰接,拉力弹簧的另一端与拉杆的一端连接,拉杆的另一端与通过第3铰轴与推拉杆的下端铰接,矩形框17的长边有水平通槽和对称的内齿条,矩形框的短边与对称的半球活塞的同径圆柱的一直径固定连接,半球活塞的同径圆柱与凵形外壳的中部动配合,凵形外壳的中部有左右通气孔与矩形框的长边外壁密封配合。矩形框在凵形外壳左右运动,不断的向凵形外壳腔体两侧内充气,推拉杆抬起不会卡住承重轮。停机时由于不再进气,在压力弹簧的作用下,泄压阀不断排气,推拉杆卡住承重轮。
Automatic windproof braking device of portal crane
门式起重机自动防风制动装置
2025-05-06
Patent
Electronic Resource
Chinese