Column type cantilever crane
By setting up a connecting structure and safety hook between the cantilever and the column, the complex and inefficient structure of traditional cantilever cranes is solved, and more efficient lifting operations are achieved.
Patent Information
- Application Number
- CN202421139525.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-23
AI Technical Summary
Traditional cantilever cranes prevent rolling by adding counterweights to the side of the cantilever, resulting in complex structure, high cost, extended lifting time and low working efficiency.
By setting up a connecting structure between the cantilever and the column, including a connecting shaft, a collar, a bearing and a cover plate, the cantilever and the column are rotatably connected, and a safety hook is provided on the outside of the cantilever to tighten the column, ensuring a stable connection between the cantilever and the column. Prevent rollover while the rotary mechanism bracket is located at the lower end of the column center of gravity to enhance stability.
It improves the connection stability between the cantilever and the column, prevents rollover, reduces lifting time, and improves work efficiency.
Smart Images
Figure CN222348558U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cranes, in particular to a column type cantilever crane. Background Art
[0002] The working strength of the cantilever crane is light. The crane is mainly composed of a column, a slewing arm slewing drive device and an electric hoist. The lower end of the column is fixed to the concrete foundation by anchor bolts, and the slewing arm is driven by a cycloidal pinwheel reducer. The electric hoist runs straight left and right on the slewing arm I-beam and lifts heavy objects. Since the weight of the heavy objects hoisted on the cantilever is generally around several tons, the stability of the connection between the column and the cantilever is particularly important. The traditional method is to add a counterweight block to the side of the cantilever and adjust the counterweight block so that the torque generated by the counterweight block on the column and the torque generated by the heavy object on the column offset each other to ensure that the crane maintains good stability and is not easy to tip over. However, if this method is used, the crane structure is complex and the cost is high. At the same time, the time to lift the goods will also increase, and the work efficiency is not high. Utility Model Content
[0003] With regard to existing cranes, a counterweight is arranged on the side of the cantilever to prevent the crane from tipping over, which results in a complex crane structure, a longer time for lifting goods, and low working efficiency. The utility model provides a column-type cantilever crane, which prevents tipping over by strengthening the connection stability between the cantilever and the column, and at the same time has a higher working efficiency for lifting heavy objects.
[0004] The technical solution is as follows: a column-type cantilever crane, comprising a column and a cantilever, the cantilever being rotatably connected to the column, an electric hoist being provided on the cantilever, characterized in that: the cantilever is connected to the upper end of a rotating mechanism bracket near the column, the lower end of the rotating mechanism bracket is provided with a rotating drive device that rotates with the column, the length of the rotating mechanism bracket is greater than half the length of the column, a fixedly connected safety hook is provided on the outer side surface of the cantilever, the hook at the lower end of the safety hook extends downward and is hooked and connected with the protruding outer edge surface at the top of the column; the cantilever and the column are rotatably connected via a connecting structure.
[0005] Its further feature is that: the connection structure includes a connection shaft, a shaft body of the connection shaft is provided with a shaft ring, the shaft ring of the connection shaft and its lower end are inserted from the central axis of the column, the upper end of the shaft ring of the connection shaft is sequentially covered with a first bearing, a bearing seat, a spacer, a second bearing, a spacer and a cover plate, a bearing sleeve is provided between the bearing seat and the cover plate, the bearing sleeve is embedded in the cantilever, and the cover plate is fixedly connected to the top of the connection shaft by bolts;
[0006] A gap is provided between the bearing sleeve and the cover plate.
[0007] After adopting the above structure, the cantilever and the column are rotatably connected through the connecting structure. A safety hook is provided on the outer side surface of the cantilever, which is hooked with the column through the safety hook to prevent the cantilever from tilting and tipping over when the cantilever lifts heavy objects. At the same time, a rotating mechanism bracket is also provided on the cantilever. The rotating bracket is used to install a rotating drive mechanism and is rotatably connected with the column through the rotating drive mechanism. At the same time, the position of the connection between the cantilever and the column is located at the lower end of the center of gravity of the column, which further ensures the connection stability between the column and the cantilever. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0009] Figure 2 For this utility model Figure 1 A schematic diagram of the enlarged structure in the middle. DETAILED DESCRIPTION
[0010] like Figure 1 , 2 As shown, a column-type cantilever crane comprises a column 1 and a cantilever 2, wherein the cantilever 2 is rotatably connected to the column 1, an electric hoist 3 is provided on the cantilever 1, and a cable pulley frame 6 is provided along the length direction of the cantilever 1. The cantilever 2 is connected to the upper end of a rotating mechanism bracket 4 near the column 1, and a rotating drive device 5 is provided at the lower end of the rotating mechanism bracket 4, which is rotatably connected to the column 1. The cantilever 2 is driven by the rotating drive mechanism 5 to rotate 360° around the column 1, wherein the length of the rotating mechanism bracket 4 is greater than half of the length of the column 1, and the rotating connection between the rotating drive mechanism 5 located on the rotating drive mechanism bracket 4 and the column 1 is located at the lower end of the center of gravity of the column 1, so that the connection between the cantilever 2 and the column 1 can ensure stability. A safety hook 6 is provided on the outer side surface of the cantilever 2. The straight rod hook body of the safety hook 6 is fixedly connected to the outer side surface of the cantilever 2 by an assembly of bolts and nuts. The hook at the lower end of the safety hook 6 extends downward and is tightly hooked with the protruding outer edge surface of the top end of the column 1. During the rotation of the cantilever 2 around the column 1, the safety hook 6 is always tightly hooked with the protruding outer edge surface of the column 1, thereby ensuring the stable connection between the cantilever 2 and the column 1 and preventing abnormalities such as rollover.
[0011] The cantilever 2 and the column 1 are rotatably connected via a connecting structure. Specifically, the connecting structure includes a connecting shaft 7. A shaft ring is provided on the shaft body of the connecting shaft 7. The shaft ring of the connecting shaft 7 and its lower end are inserted from the center axis of the column 1. The upper end of the shaft ring of the connecting shaft 7 is sequentially covered with a first bearing 8, a bearing seat 9, a spacer sleeve 10, a second bearing 11, a spacer sleeve 12 and a cover plate 13. A bearing sleeve 14 is also provided between the bearing seat 9 and the cover plate 13. The bearing sleeve 14 is embedded in the cantilever 2. The cover plate 13 is fixedly connected to the top of the connecting shaft 7 by bolts. A gap is provided between the bearing sleeve 14 and the cover plate 13, and the gap can be 7 mm.
[0012] The above are only preferred specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by anyone familiar with the technology within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A column-type cantilever crane, comprising a column and a cantilever, wherein the cantilever is rotatably connected to the column, and an electric hoist is provided on the cantilever, characterized in that: The cantilever is connected to the upper end of the rotating mechanism bracket near the column, and the lower end of the rotating mechanism bracket is provided with a rotating drive device that rotates with the column. The length of the rotating mechanism bracket is greater than half the length of the column. A fixedly connected safety hook is provided on the outer side surface of the cantilever, and the hook at the lower end of the safety hook extends downward and is tightly hooked with the protruding outer edge surface at the top of the column; the cantilever and the column are rotatably connected via a connecting structure.
2. A column-type cantilever crane according to claim 1, characterized in that: The connecting structure includes a connecting shaft, a shaft ring is provided on the shaft body of the connecting shaft, the shaft ring of the connecting shaft and its lower end are inserted from the central axis of the column, the upper end of the shaft ring of the connecting shaft is sequentially covered with a first bearing, a bearing seat, a spacer sleeve, a second bearing, a spacer sleeve and a cover plate, a bearing sleeve is provided between the bearing seat and the cover plate, the bearing sleeve is embedded in the cantilever, and the cover plate is fixedly connected to the top of the connecting shaft by bolts.
3. A column-type cantilever crane according to claim 2, characterized in that: A gap is provided between the bearing sleeve and the cover plate.