6results about How to "Increased lifting capacity" patented technology

The utility model relates to hoisting tool technical field, especially point to a kind of carrying hoisting tool in field operation without network power supply, solve the problem of inconvenient equipment disassembly and carrying, poor assembly convenience in prior art, including crane frame and crane chassis, be equipped with middle shaft outer sleeve pipe on crane frame, be equipped with chassis central shaft on crane chassis, chassis central shaft and middle shaft outer sleeve pipe plug-in cooperation, the length of chassis central shaft is less than one half of middle shaft outer sleeve pipe length;Rotary drive mechanism is equipped between crane frame and crane chassis;Crane frame is detachably connected with lifting arm, take-up assembly and power generation component on it.Affirmative effect is: reduce assembly labor intensity, improve field deployment efficiency, chassis central shaft length is designed as less than one half of middle shaft outer sleeve pipe length, only need to lift crane frame to slightly higher than chassis central shaft height during assembly, it can be realized that chassis central shaft and middle shaft outer sleeve pipe plug-in cooperation, without auxiliary equipment, substantially improve the deployment efficiency of field operation.

The utility model discloses an assembly type high-strength prestress broken line type roof truss U-shaped hoisting accessory which comprises a hoisting main body, the top of the hoisting main body is fixedly connected with a connecting piece, two through holes are formed in the hoisting main body, and two lock bolts are jointly arranged in the two through holes in a clamped mode. According to the utility model, firstly, the roof truss is punched, after punching, the bidirectional threaded rod is rotated, so that the two threaded sleeves move towards each other or away from each other outside the bidirectional threaded rod, the two limiting sleeves can coincide with the two round holes outside the roof truss through the linkage of the two sliding rods, and then the lock bolt penetrates through the two limiting sleeves, so that the connection operation of hoisting is realized; the drilling distance outside the roof truss does not need to be accurately measured in the process, so that the hoisting and assembling process is more efficient and faster, through the embedded tungsten steel alloy frame, the hardness of the whole device can be improved, the pulling resistance and the hoisting capacity of the whole device in the hoisting operation process can be improved, and meanwhile the durability and the stability in the hoisting process are improved.

This application discloses a luffing tower crane jib head, including a modularly designed jib head frame, hoisting pulley block, and maintenance basket. The jib head frame consists of a lower section structure, a main chord structure, and a first diagonal web member, which is stable and easy to connect. The lower section structure has detachable and modular outriggers at the bottom, which facilitates support during transportation and installation and reduces weight during operation. One end of the main chord member is firmly connected to the jib section, while the other end is closed to enhance strength. The first diagonal web member and the transverse web member form a triangular structure to distribute the force. The hoisting pulley block is equipped with a rope-stopping device, with the rope-stopping ring and rope-stopping rod providing double protection to prevent the wire rope from detaching and ensuring convenient wire rope passage. In addition, a walkway, handrails, and maintenance basket are provided to offer workers a stable working platform. This application improves the spatial adaptability, safety, and operational efficiency of the luffing tower crane jib head while reducing costs.

The utility model relates to the technical field of mining machinery, in particular to a vehicle-mounted hoisting arm for a low and narrow space of a coal mine, which comprises a mounting seat assembly, a rotary seat, a pitching driving piece, a first arm frame, a second arm frame, a third arm frame and a hoisting piece, the rotary seat is mounted on the mounting seat assembly in a transshipment manner, and a back pitching arm is arranged on the rotary seat; the first arm frame is connected to the back pitching arm, and the pitching driving piece is connected between the rotary seat and the first arm frame; the second arm frame is inserted into the first arm frame in a sliding manner; the third arm frame is inserted into the second arm frame in a sliding manner; and the hoisting piece is connected to the tail end of the third arm support. According to the lifting arm, the height of the lifting arm can be fully compressed, the purpose of reducing the size and volume of the lifting arm is achieved, the length of the lifting arm in a retracted state can be further reduced, and the technical problem that in the prior art, a lifting arm arranged on a coal mine underground transport vehicle cannot be suitable for low and narrow roadways is solved.

This utility model relates to the field of boom assembly technology and discloses a lightweight mechanical boom assembly, including a first fixing frame, a second fixing frame welded to the lower surface of the first fixing frame, and an anti-slip pedal welded to the upper surface of the first fixing frame. The outer wall of the first fixing frame is provided with a fixing mechanism for fixing the assembly, and the lower surface of the second fixing frame is provided with a reinforcing mechanism for strengthening the assembly. The fixing mechanism includes four connectors, each welded to both ends of the first fixing frame. A fixing rod is inserted into the interior of each of the four connectors, and a guardrail is welded to the upper surface of the fixing rod. This utility model, by providing an anti-slip pedal on the first fixing frame, facilitates the movement of maintenance personnel on the first fixing frame, thereby facilitating subsequent maintenance of the boom assembly. Furthermore, the fixing rods on the connectors, in conjunction with the guardrails, provide protection.

The utility model relates to the field of engineering machinery, and discloses a chassis structure for an automobile crane and the automobile crane, the chassis structure comprises a box-type frame, a tail supporting leg box body and a slewing bearing mounting seat, the box-type frame extends in the front-back direction, and the cross section of the box-type frame is in an inverted trapezoidal shape; the tail supporting leg box body is arranged at the tail part of the box type frame and is used for installing the tail supporting leg mechanism, the outer end of the tail supporting leg box body is provided with a box body opening for the tail supporting leg mechanism to extend out, and the slewing bearing mounting seat is arranged between the middle part and the tail part of the box type frame. According to the chassis structure for the automobile crane and the automobile crane, the lateral hoisting performance and the tail hoisting performance of the crane can be improved, and therefore the hoisting operation efficiency is improved.