Reclining jib crane
By using the rotating column and locking lug structure of the inverted cantilever crane to achieve the folding of the cantilever beam and reinforcing beam, the problem of excessive height and width of the cantilever crane in vehicle transportation is solved, and a safe, reliable, space-saving, and easy-to-operate lifting function is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WEIHAI YIHE SPECIAL EQUIP MFG CO LTD
- Filing Date
- 2025-07-03
- Publication Date
- 2026-07-21
AI Technical Summary
When existing cantilever cranes are installed on top of box trucks or modular vehicles, the vehicle's height and width exceed transportation limits, making it impossible to meet the requirements for road transport.
Design a collapsible cantilever crane that folds the cantilever beam and reinforcing beam by rotating the column and locking lug structure. Utilize bearing assemblies to withstand forces in different directions, ensuring that it is folded flat during transportation and unfolded for lifting operations during work.
It solves the problems of vehicles exceeding height and width limits, saves space, is simple to operate, safe and reliable, and meets transportation requirements.
Smart Images
Figure CN224530488U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cantilever cranes, specifically a type of inverted cantilever crane. Background Technology
[0002] As is well known, there are many types of cantilever cranes. Generally, cantilever cranes can only be used in environments where height is not restricted, such as rooftops or ground level. If installed on the top of a van or modular vehicle, the vehicle height will exceed the road transport limit, thus failing to meet the transport requirements. Summary of the Invention
[0003] In order to overcome the shortcomings of the existing technology, this utility model provides a tilting cantilever crane, which can be unfolded for lifting work during operation and folded up and flattened during transportation.
[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a cantilever crane with a roof panel, characterized in that a fixed column is connected to a fixed base on the roof panel via a hinged shaft, locking lugs are installed at the top and bottom of the fixed column, a rotating column is connected to the fixed column via a bearing assembly, a rotating column locking lug is installed at the bottom of the rotating column, the pivot ends of the cantilever beam and the reinforcing beam are respectively hinged to the rotating column, a cantilever beam locking lug is installed in the middle of the cantilever beam, and the non-pivot ends and the middle part of the reinforcing beam are respectively fitted with locking lugs. The vehicle is equipped with a reinforcing beam support lock lug and a reinforcing beam center lock lug. The lock lug below the fixed column is locked to the working locking seat fixed on the roof panel via a quick-release pin a. The reinforcing beam support lock lug of the reinforcing beam is connected to the cantilever beam lock lug of the cantilever beam via a quick-release pin c. The lock lug above the fixed column can be locked to the transport locking seat fixed on the roof panel via a quick-release pin b. The rotating column lock lug can be hinged to the reinforcing beam support lock lug via a quick-release pin d. The reinforcing beam center lock lug can be hinged to the cantilever beam lock lug via a quick-release pin c.
[0005] The bearing assembly is located between the rotating column and the fixed column, and the upper deep groove ball bearing, thrust ball bearing, and lower deep groove ball bearing of the bearing assembly are connected to the inner wall of the fixed column.
[0006] The beneficial effects of this utility model are that it solves the problem of excessive vehicle height by tilting the vehicle, and solves the problem of excessive vehicle width or interference with other equipment on the roof by folding the cantilever beam and reinforcing beam. It saves space, is simple to operate, and is safe and reliable. Attached Figure Description
[0007] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0008] Figure 1 This is a front view of the present invention in its working state.
[0009] Figure 2This is a left view of the present invention in its working state.
[0010] Figure 3 This is a top view of the present invention in its working state.
[0011] Figure 4 This is a top view of the present invention in its transportation state.
[0012] Figure 5 This is a cross-sectional view of the bearing assembly of this utility model.
[0013] Figure 6 This is a schematic diagram of the bottom fixing method of this utility model.
[0014] In the diagram: 1. Cantilever beam, 2. Reinforcing beam, 3. Rotating column, 4. Bearing assembly, 5. Fixed column, 6. Transport locking seat, 7. Fixed base, 8. Working locking seat, 9. Upper deep groove ball bearing, 10. Upper deep groove ball bearing retaining ring, 11. Thrust ball bearing, 12. Thrust ball bearing retaining ring, 13. Lower deep groove ball bearing, 14. Lower deep groove ball bearing retaining cover, 15. Fixing bolt, 16. Roof panel, 17. Hinge shaft, 18. Quick-release pin a, 19. Quick-release pin b, 20. Quick-release pin c, 21. Quick-release pin d. Detailed Implementation
[0015] In the figure, this utility model is installed and fixed on the roof plate of a vehicle (or carriage, container, etc.) with a certain strength, referred to here as the roof plate 16. The fixing base 7, the working locking seat 8, and the transport locking seat 6 are all installed on the roof plate 16. Locking lugs are provided above and below the fixing column 5, and the fixing column 5 is connected to the fixing base 7 via the hinge shaft 17. The rotating column 3 is connected to the fixing column 5 through the bearing assembly 4, and the rotating column 3 has a rotating column locking lug at its bottom. The rotating shaft ends of the cantilever beam 1 and the reinforcing beam 2 are respectively hinged to the rotating column 3. The middle part of the cantilever beam 1 has a cantilever beam locking lug, and the non-rotating shaft end and the middle part of the reinforcing beam 2 have reinforcing beam support locking lugs and reinforcing beam middle locking lugs, respectively. Bearing assembly 4 is located between rotating column 3 and fixed column 5. The upper deep groove ball bearing 9, thrust ball bearing 11, and lower deep groove ball bearing 13 of bearing assembly 4 are connected to the inner wall of fixed column 5. An upper deep groove ball bearing retaining ring 10 is fitted on the rotating column 3 between the upper deep groove ball bearing 9 and the thrust ball bearing 11, and a thrust ball bearing retaining ring 12 is fitted on the rotating column 3 between the thrust ball bearing 11 and the lower deep groove ball bearing 13. A lower deep groove ball bearing retaining cover 14 is installed at the lower end of rotating column 3 via fixing bolts 15. Quick-release pin a18 is inserted into the working locking seat 8, quick-release pin b19 is inserted into the transport locking seat 6, quick-release pin c20 is inserted into the cantilever beam locking lug of the cantilever beam 1, and quick-release pin d21 is inserted into the rotating column locking lug of the rotating column 3.
[0016] In the transport state, the fixed column 5 is parallel to the roof panel 16. The locking lugs on the top of the fixed column 5 are locked to the transport locking seat 6 by quick-release pin b19. The reinforcing beam support locking lugs of the reinforcing beam 2 are locked to the rotating column locking lugs of the rotating column 3 by quick-release pin d21. The cantilever beam locking lugs of the cantilever beam 1 are locked to the reinforcing beam locking lugs of the reinforcing beam 2 by quick-release pin c20.
[0017] In the working state, the fixed column 5 is perpendicular to the roof panel 16. The locking lugs below the fixed column 5 are locked to the working locking seat 8 by quick-release pin a18, and the cantilever beam locking lugs of the cantilever beam 1 are locked to the reinforcing beam support locking lugs of the reinforcing beam 2 by quick-release pin c20. When the mechanism lifts heavy objects, the upper deep groove ball bearing 9 bears the vertical downward force, the thrust ball bearing 11 bears the horizontal force, and the lower deep groove ball bearing 13 is used to prevent the rotating column 3 from coming off.
[0018] During operation, a lifting device (electric hoist) is installed on the end face of the cantilever beam 1. The rotating column 3 is pushed to position the lifting device above the load. After lifting the load, the rotating column 3 is pushed again to position the load above a suitable landing point (such as the side of the vehicle) before the load is lowered.
Claims
1. A type of inverted cantilever crane, equipped with a roof panel, characterized in that, The fixed column is connected to the fixed base on the roof panel via a hinge. Locking lugs are installed at the top and bottom of the fixed column. The rotating column is connected to the fixed column via a bearing assembly. A rotating column locking lug is installed at the bottom of the rotating column. The pivot ends of the cantilever beam and the reinforcing beam are hinged to the rotating column. A cantilever beam locking lug is installed in the middle of the cantilever beam. Reinforcing beam support locking lugs and reinforcing beam center locking lugs are installed at the non-pivot ends and middle of the reinforcing beam, respectively. The locking lugs at the bottom of the fixed column are locked to the working locking seat fixed on the roof panel via quick-release pin a. The reinforcing beam support locking lugs of the reinforcing beam are connected to the cantilever beam locking lugs of the cantilever beam via quick-release pin c. The locking lugs at the top of the fixed column can be locked to the transport locking seat fixed on the roof panel via quick-release pin b. The rotating column locking lugs can be hinged to the reinforcing beam support locking lugs via quick-release pin d. The reinforcing beam center locking lugs can be hinged to the cantilever beam locking lugs via quick-release pin c.
2. The inverted cantilever crane according to claim 1, characterized in that... The bearing assembly is located between the rotating column and the fixed column, and the upper deep groove ball bearing, thrust ball bearing, and lower deep groove ball bearing of the bearing assembly are connected to the inner wall of the fixed column.