Rotary buffer with limit switch for platform crane
A technology of limit switches and buffers, which is applied to cranes and other directions, can solve problems such as inaccurate positioning, easy crushing of limit switches, and difficult adjustment of limit switches, and achieves the effect of simple structure
Inactive Publication Date: 2013-12-04
BAOJI PETROLEUM MASCH CO LTD
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Problems solved by technology
[0003] The purpose of the present invention is to provide a rotary buffer with limit switches for platform cranes, which solves the difficulty in adjusting the limit switches of platform cranes in the prior art, inaccurate positioning, and easy crushing of the limit switches. The problem
Method used
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[0012] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0013] figure 1 It is the installation position diagram of the rotary type belt limit switch buffer for the platform crane of the present invention on the platform crane. Two sets of rotary type belt limit switch buffers 21 are installed on one set of platform crane. Two sides of 20 respectively symmetrically install a cover, wherein the limit switch installation hydraulic limit switch on a cover, can install electric limit switch on another cover. The arm frame 1 of the platform crane can rotate along the lower pin shaft when the luffing winch 19 is pulled or lowered, and the luffing winch 19 drives the arm frame 1 to rotate through a set of pulley blocks. The mast 20 is used to support the luffing transmission mechanism and install the buffer.
[0014] figure 2 It is a structural schematic diagram of the rotary buffer with limit switch ...
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The invention discloses a rotary buffer with a limit switch for a platform crane. The rotary buffer comprises an assembly lug plate 1 and an assembly lug plate 2 which are arranged on a gantry, wherein a limiting plate is arranged on the lower edge of the assembly lug plate 1; the limit switch is arranged in the limiting plate; the assembly lug plate 1 is hinged with the buffer; a pressure spring and a guide sleeve are arranged inside the buffer; the port of the guide sleeve of the buffer is provided with a buffer ejector rob; the outer end of the buffer ejector rob is connected with the pressure head of the buffer ejector rob; a limiting edge is formed on the lower surface of the buffer close to a pin shaft and is provided with a pressing plate; a buffer fulcrum pressing plate is arranged on an arm support corresponding to the pressure head of the buffer ejector rob; the assembly lug plate 2 is hinged with a repositor; a pressure spring 2 is arranged inside a guide sleeve 2; pressing rods are arranged at both ports of the guide sleeve 2; and the outer ends of the pressing rods are hinged with the buffer. The rotary buffer has a simple structure, and the operability, the accuracy and the safety of the rotary buffer meet technical requirements.
Description
technical field [0001] The invention belongs to the technical field of marine drilling equipment, and relates to a rotary buffer with a limit switch for a platform crane. Background technique [0002] The offshore platform crane uses a luffing winch (or oil cylinder) to change the amplitude. When the boom reaches the maximum angle limited by the design, a buffer is installed between the boom and the mast to prevent the boom from rotating backwards excessively. Commonly used buffers are installed on the mast and cannot be rotated. When the boom is rotated to the maximum allowable angle, after the bumper push rod contacts the boom, the push rod does not rotate with the boom. During the rotation of the frame, the contact point with the boom will produce slippage or the buffer itself will deform to eliminate the displacement caused by the fixed contact point. Since the shock absorber cannot rotate with it, the shock absorber push rod bears a large down force while retracting. ...
Claims
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IPC IPC(8): B66C23/88B66C23/94
Inventor 冯文龙徐小鹏周亚辉蔡娟张茄新
Owner BAOJI PETROLEUM MASCH CO LTD