Novel upper rotary cantilever crane structure
Through the combination of external toothed rotary support and slewing reducer motor drive gear, combined with safety protection hook plate, the complex structure and insufficient safety of the cantilever crane are solved, and a new upper rotary cantilever crane structure with simple assembly and improved safety is realized.
Patent Information
- Application Number
- CN202420934320.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The existing cantilever cranes have complex structures, high cost and lack protection functions, especially when constructing near intensive business lines.
External toothed rotary support is used to connect the cantilever and column, and the rotation is achieved through the slewing reducer motor drive gear, combining safety protection hook plate to prevent bolts from loosening, limit stops and rollers to limit the rotation angle.
It achieves simple structure and convenient assembly, improves safety, prevents cantilever tilt, and enhances construction safety.
Smart Images
Figure CN223073805U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cranes, in particular to a new structure of an upper slewing jib crane. Background Art
[0002] The jib crane belongs to industrial components and is a light-duty crane, which plays a very important role in modern production and construction projects. When constructing near intensive operating lines, due to site restrictions, a truck crane needs to apply for a lifting order, and the waste of mechanical working shifts is relatively serious, while a tower crane will intrude into the operating line.
[0003] In the prior art, application number CN202321779513.8 is a full-slewing jib crane, which is assembled by setting multiple groups of gears and bearing assemblies, with a complex structure and high cost, and this structure does not have a protection function.
[0004] Therefore, it is necessary to design a new structure of an upper slewing jib crane to solve the above problems. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a new structure of an upper slewing jib crane to overcome the above-mentioned deficiencies existing in the current prior art.
[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0007] A new structure of an upper slewing jib crane includes a vertically arranged column 1 and a jib placed at the top of the column and perpendicular to the column. The jib is installed in cooperation with the column through a slewing assembly. The slewing assembly includes an external gear slewing bearing placed between the jib and the column, a slewing reduction motor arranged on the jib, and a gear driven by the slewing reduction motor. The tooth part of the gear is meshed with the tooth part of the outer ring of the external gear slewing bearing. A safety protection hook plate is arranged at the bottom of the connection surface between the jib and the external gear slewing bearing.
[0008] Preferably, the installation protection hook plate is in a C-shaped structure, the upper end is fixed to the bottom surface of the jib through a nut, the lower end is placed below the connection surface between the column and the external gear slewing bearing, and at least two groups of the installation protection hook plates are arranged, respectively placed at both ends of the slewing reduction motor.
[0009] Preferably, a limit stop block is arranged on the side surface of the top of the column, and a limit roller is installed at the bottom of the jib through a nut. The limit stop block is on the movement track of the limit roller.
[0010] Preferably, a column bottom plate is arranged at the bottom of the column.
[0011] The beneficial effects of the present utility model are as follows: In this technical solution, the outer gear slewing bearing is respectively connected to the column and the cantilever, and then the gear is driven by the slewing reduction motor to achieve slewing. The structure is simple and convenient to assemble. Moreover, a safety protection hook plate is provided to prevent the bolts of the outer gear slewing bearing from loosening, playing a protective role and improving safety. Brief Description of the Drawings
[0012] Figure 1 It is a structural schematic diagram of a novel upper slewing jib crane structure of the present utility model;
[0013] Figure 2 It is a side view of a novel upper slewing jib crane structure of the present utility model;
[0014] Figure 3 It is a partial explosion view of a novel upper slewing jib crane structure of the present utility model;
[0015] In the figure: 1, column; 2, cantilever; 3, outer gear slewing bearing; 4, slewing reduction motor; 5, gear; 6, bolt; 7, nut; 8, pin shaft; 9, safety protection hook plate; 10, limit stop block; 11, limit roller; 12, column base plate. Detailed Description of the Preferred Embodiment
[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0017] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
[0018] Refer to Figures 1 to 3 , a novel upper slewing jib crane structure, which includes a vertically arranged column 1 and a cantilever 2 disposed at the top of the column and perpendicular to the column. The cantilever is installed in cooperation with the column through a slewing assembly;
[0019] In order to improve stability and facilitate installation, a column base plate 12 is provided at the bottom of the column.
[0020] The slewing assembly includes an external gear slewing bearing 3 disposed between the cantilever and the column, a slewing reduction motor 4 provided on the cantilever, and a gear 5 driven by the slewing reduction motor; the tooth portion of the gear is engaged with the tooth portion of the outer ring of the external gear slewing bearing.
[0021] In order to effectively connect the cantilever and the column and effectively cooperate with the slewing, the outer ring of the external gear slewing support is fixed to the column through bolts 6 and nuts 7, and an activity space is formed between the bolts and the nuts, so as to limit the rotation of the outer ring of the external gear slewing support, thereby playing a role in fixed installation. The inner ring of the external gear slewing support is fixed to the cantilever through a pin shaft 8;
[0022] In order to improve safety and prevent the bolts of the external gear slewing bearing 3 from loosening, a safety protection hook plate 9 is provided at the bottom of the connection surface between the cantilever 2 and the external gear slewing bearing 3. The installation protection hook plate is in a C-shaped structure, and the upper end is fixed to the bottom surface of the cantilever 2 through a nut, and the lower end is placed below the connection surface between the column and the external gear slewing bearing 3. At least two groups of the installation protection hook plates are provided, and are respectively placed at both ends of the slewing reduction motor 4. When the bolts of the external gear slewing bearing 3 are loose and the cantilever tilts, the installation protection hook plate will hook the bottom surface of the column to achieve a protection effect.
[0023] In order to effectively limit the slewing angle, a limit stop block 10 is provided on the side surface of the top of the column, and a limit roller 11 is installed at the bottom of the cantilever through a nut. The limit stop block is placed on the movement track of the limit roller, so as to play a role in limiting and blocking;
[0024] In this embodiment, the slewing reduction motor drives the gear to rotate, so that the external teeth of the external gear slewing bearing move to achieve a slewing action. During the slewing action, the limit roller rotates synchronously and stops running until it reaches the limit stop block.
[0025] The beneficial effects of the present utility model are as follows: In this technical solution, the external gear slewing bearing is respectively connected to the column and the cantilever, and then the gear is driven by the slewing reduction motor to achieve slewing. The structure is simple and convenient to assemble. Moreover, a safety protection hook plate is also provided to prevent the bolts of the external gear slewing bearing from loosening, playing a protection role and improving safety.
[0026] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.
Claims
1. A novel structure of an upper slewing jib crane, which comprises a vertically arranged column and a jib disposed at the top of the column and perpendicular to the column, and the jib is installed in cooperation with the column through a slewing assembly, and is characterized in that: The slewing assembly includes an external gear slewing bearing disposed between the cantilever and the column, a slewing reduction motor provided on the cantilever, and a gear driven by the slewing reduction motor. The tooth portion of the gear is engaged with the tooth portion of the outer ring of the external gear slewing bearing. A safety protection hook plate is provided at the bottom of the connection surface between the cantilever and the external gear slewing bearing.
2. The structure of a novel upper slewing jib crane according to claim 1, characterized in that: The installation protection hook plate is in a C-shaped structure. The upper end is fixed to the bottom surface of the cantilever by a nut, and the lower end is placed below the connection surface between the column and the external gear slewing bearing. And at least two groups of the installation protection hook plates are provided, which are respectively placed at both ends of the slewing reduction motor.
3. A novel upper slewing jib crane structure according to claim 1, characterized in that: A limit stop block is provided on the side surface of the top of the column, and a limit roller is installed at the bottom of the cantilever by a nut. The limit stop block is placed on the movement track of the limit roller.
4. A novel structure of an upper slewing jib crane according to claim 1, characterized in that: A column bottom plate is provided at the bottom of the column.