Portal frame of forklift
By adopting asymmetric structure and reinforcement rib design on the forklift door frame, the problem of insufficient bending ability of the door frame is solved, the stiffness and load-bearing capacity are improved, shaking is reduced, and the operator's field of view is improved.
Patent Information
- Application Number
- CN202421879214.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-05
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-08-05
AI Technical Summary
The existing forklift door frames have insufficient bending resistance, which is prone to deformation and shaking, affecting the load-bearing capacity and the operator's field of view.
The door frame design adopts an asymmetric structure. By providing a first reinforcement rib and a second reinforcement rib on the rear side of the outer and inner door frames, an accommodation space is formed to accommodate the main lifting cylinder, thereby improving the stiffness and compactness of the door frame.
It improves the stiffness and load-bearing capacity of the gantry, reduces deformation and shaking, improves the operator's field of view, and makes the positioning of the main lifting cylinder more reasonable.
Smart Images
Figure CN222935131U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of industrial vehicles, in particular to a mast of a forklift truck. Background Art
[0002] A forklift truck is an industrial handling vehicle used for loading, unloading, stacking and short-distance transportation operations of palletized goods. It plays a very important role in the logistics system and is widely used in various departments of the national economy such as stations, ports, airports, factories, warehouses, etc.
[0003] Currently, the profiled steel used for the mast on a forklift truck mainly uses C-shaped steel and H-shaped steel (symmetrical profiled steel), with insufficient bending resistance. When the forklift truck is working, the mast is prone to deformation and the shaking will increase. In addition, the main lifting cylinder is usually arranged on the side or the middle position at the back of the profiled steel, and such an arrangement is not compact enough and is not conducive to the operator's vision. Summary of the Utility Model
[0004] The main purpose of the utility model is to overcome the defect of insufficient bending resistance of the existing mast, and to provide a mast of a forklift truck, which adopts an asymmetrical structure to improve the stiffness of the mast, reduce the deformation amount, and further improve the load-bearing capacity of the mast.
[0005] The utility model adopts the following technical solutions:
[0006] A mast of a forklift truck includes an outer mast and at least one inner mast, and the inner mast is in sliding fit with the adjacent outer mast; a first reinforcing rib is arranged at the rear side of the outer mast, and a second reinforcing rib is arranged at the rear side of the inner mast adjacent to the outer mast. A receiving space is formed between the first reinforcing rib and the second reinforcing rib to accommodate the main lifting cylinder.
[0007] The outer mast includes two first columns and two first connecting plates. The two first columns are arranged in parallel at intervals, and first tracks are respectively arranged on the inner sides thereof. The two first connecting plates are respectively connected between the two ends of the two first columns in the height direction; the first reinforcing rib is formed at the rear side of the first column and extends along the height direction of the first column; the outer mast adjacent to the inner mast is in sliding fit with the first track.
[0008] A first groove is arranged on the inner side of the first reinforcing rib and extends along the height direction of the first column.
[0009] The size of the first reinforcing rib in the height direction of the first column is smaller than the size of the first column in the height direction.
[0010] A third reinforcing rib is further arranged at the rear side of the first reinforcing rib and extends along the height direction of the first column.
[0011] A third groove is further provided inside the third reinforcing rib, and the third groove extends along the height direction of the first upright post.
[0012] The dimension of the third reinforcing rib in the height direction of the first upright post is smaller than the dimension of the first reinforcing rib in the height direction of the first upright post.
[0013] The inner gantry adjacent to the outer gantry includes two second upright posts and two second connecting plates. The two second upright posts are arranged in parallel at intervals, and the two second connecting plates are respectively connected between the two ends in the height direction of the two second upright posts; the second reinforcing rib is formed on the rear side of the second upright post and extends along the height direction of the second upright post.
[0014] A second groove is provided on the side of the second reinforcing rib opposite to the first reinforcing rib, and the second groove extends along the height direction of the second upright post.
[0015] The dimension of the second reinforcing rib in the height direction of the second upright post is smaller than the dimension of the second upright post in the height direction.
[0016] As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following beneficial effects:
[0017] 1. In the present invention, a first reinforcing rib and a second reinforcing rib are respectively provided on the rear sides of the outer gantry and the inner gantry adjacent thereto. The first reinforcing rib and the second reinforcing rib are used to improve the stiffness of the gantry, thereby reducing the deformation amount of the gantry, improving the shaking, and improving the load-bearing capacity of the gantry. A receiving space is formed between the first reinforcing rib and the second reinforcing rib to accommodate the main lifting oil cylinder, and the components are compact and reasonable.
[0018] 2. In the present invention, the outer gantry includes a first upright post and a first connecting plate. The first reinforcing rib is formed on the rear side of the first upright post and extends along the height direction of the first upright post. A first groove that is locally adapted to the main lifting oil cylinder is provided inside the first reinforcing rib. The inner gantry adjacent to the outer gantry is provided with a second upright post and a second connecting plate. The second reinforcing rib is formed on the rear side of the second upright post and extends along the height direction of the second upright post. A second groove that is locally adapted to the main lifting oil cylinder is provided inside the second reinforcing rib, so that the first reinforcing rib and the second reinforcing rib can better position the main lifting oil cylinder.
[0019] 3. In the present utility model, a third reinforcing rib is further provided at the rear side of the first reinforcing rib, and a third groove is further provided inside the third reinforcing rib. The third groove cooperates with the first groove and the second groove to position the main lifting oil cylinder. Among them, the dimensions of the first reinforcing rib, the second reinforcing rib, and the third reinforcing rib in the height direction of the gantry are smaller than the dimensions of the corresponding upright columns in the height direction, which can be set according to actual situations. On the premise of ensuring rigidity, it does not affect the layout of other structures of the forklift. Description of the Drawings
[0020] Figure 1 It is a structural diagram of the present utility model;
[0021] Figure 2 It is an exploded view of the present utility model;
[0022] Figure 3 It is a structural diagram of the first upright column;
[0023] Figure 4 It is a structural diagram of the second upright column;
[0024] Figure 5 It is a schematic diagram of the gantry upright column;
[0025] Figure 6 It is a cooperation diagram of the main lifting oil cylinder and the gantry;
[0026] Among them:
[0027] 10. Outer gantry; 11. First upright column; 12. First connecting plate; 13. First reinforcing rib; 14. First groove, 15. Third reinforcing rib, 16. Third groove; 17. First track; 18. First roller; 20. Inner gantry, 21. Second upright column; 22. Second connecting plate; 23. Second reinforcing rib; 24. Second groove, 25. Guide groove; 26. Third upright column; 27. Third connecting plate; 28. Second roller; 29. Accommodation space; 30. Main lifting oil cylinder. Detailed Embodiment
[0028] The following further describes the present utility model through specific embodiments.
[0029] The terms "first", "second", etc. that appear in the present utility model are only for convenient description to distinguish different components with the same name, and do not represent a sequence or primary-secondary relationship.
[0030] In the description of the present utility model, the orientation or positional relationship indicated by "upper", "lower", "left", "right", "front", and "rear" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present utility model.
[0031] In addition, in the description of the present application, unless otherwise specified, "a plurality of" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the front and rear associated objects.
[0032] See Figures 1 to 6 , a mast of a forklift, including an outer mast 10 and at least one inner mast 20. The inner mast 20 is in sliding fit with the adjacent outer mast 10. The number of inner masts 20 can be one or two. If there is one inner mast 20, the outer mast 10 and the inner mast 20 form a two-stage mast. If there are two inner masts 20, the middle inner mast 20 serves as the middle mast, and the outer mast 10, the middle mast, and the inner mast 20 form a three-stage mast.
[0033] In the present utility model, a first reinforcing rib 13 is provided at the rear side of the outer mast 10, and a second reinforcing rib 23 is provided at the rear side of the inner mast 20 adjacent to the outer mast 10. The reinforcing ribs are provided on the outer mast 10 and the inner mast 20 to improve the stiffness of the mast. A receiving space 29 is formed between the first reinforcing rib 13 and the second reinforcing rib 23 to accommodate the main lifting cylinder 30. The main lifting cylinder 30 is a cylinder for lifting the inner mast 20. Among them, the rear side of the outer mast 10 refers to the side of the outer mast 10 facing away from the forklift forks, and the rear side of the inner mast 20 refers to the side of the inner mast 20 facing away from the forklift forks. Then, the first reinforcing rib 13 and the second reinforcing rib 23 are located on the same side of the mast, and there is a gap between them to form the receiving space 29. The arrangement of the receiving space 29 surrounding the main lifting cylinder 30 can better limit the main lifting cylinder 30.
[0034] Furthermore, the outer mast 10 includes two first columns 11 and two first connecting plates 12. The two first columns 11 are arranged in parallel at intervals, and first tracks 17 are respectively provided on the inner sides. The two first connecting plates 12 are respectively connected between the two ends of the two first columns 11 in the height direction, that is, one first connecting plate 12 is connected to the tops of the two first columns 11, and the other first connecting plate 12 is connected to the bottoms of the two first columns 11. The first reinforcing rib 13 is formed at the rear side of the first column 11 and extends along the height direction of the first column 11. The outer mast 10 adjacent to the inner mast 20 is in sliding fit with the first track 17. The first track 17 extends along the height direction of the first column 11, and rotatable first rollers 18 can be respectively connected to both ends inside the first track 17. The outer mast 10 adjacent to the inner mast 20 is in sliding fit with the first rollers 18.
[0035] A first groove 14 is provided inside the first reinforcing rib 13, and the first groove 14 extends along the height direction of the first upright post 11. The inner side of the first reinforcing rib 13 refers to the side opposite to another first reinforcing rib 13. The dimension of the first reinforcing rib 13 in the height direction of the first upright post 11 is smaller than the dimension of the first upright post 11 in the height direction, that is, one end or both ends of the first reinforcing rib 13 in the height direction have a distance from the corresponding ends of the first upright post 11 in the height direction.
[0036] A third reinforcing rib 15 is further provided at the rear side of the first reinforcing rib 13, and the third reinforcing rib 15 extends along the height direction of the first upright post 11. A third groove 16 is further provided inside the third reinforcing rib 15, and the third groove 16 extends along the height direction of the first upright post 11. The inner side of the third reinforcing rib 15 refers to the side opposite to another third reinforcing rib 15. The third groove 16 is docked with the first groove 14 to better fit the shape of the outer periphery of the main lifting oil cylinder 30. The dimension of the third reinforcing rib 15 in the height direction of the first upright post 11 is smaller than the dimension of the first reinforcing rib 13 in the height direction of the first upright post 11, that is, both ends of the third reinforcing rib 15 in the height direction have a distance from the corresponding ends of the first reinforcing rib 13 in the height direction, and the third reinforcing rib 15 can be located in the middle of the first reinforcing rib 13 in the height direction.
[0037] The inner gantry 20 adjacent to the outer gantry 10 includes two second upright posts 21 and two second connecting plates 22. The two second upright posts 21 are arranged in parallel at intervals, and the two second connecting plates 22 are respectively connected between the two ends of the two second upright posts 21 in the height direction; that is, one second connecting plate 22 is connected to the tops of the two second upright posts 21, and the other second connecting plate 22 is connected to the bottoms of the two second upright posts 21. The main body of the first upright post 11 is made of H-shaped steel. The second reinforcing rib 23 is formed at the rear side of the second upright post 21 and extends along the height direction of the second upright post 21, making the second upright post 21 an asymmetric structure. A guide groove 25 is provided on the side of the second upright post 21 opposite to the outer gantry 10, and the guide groove 25 extends along the height direction of the second upright post 21. The first roller 18 on the first upright post 11 is slidably embedded in the guide groove 25.
[0038] The second reinforcing rib 23 is located at one end of the rear side of the second upright post 21 away from the first reinforcing rib 13. A second groove 24 is provided on the side of the second reinforcing rib 23 opposite to the first reinforcing rib 13, and the second groove 24 extends along the height direction of the second upright post 21. The first groove 14, the second groove 24 and the third groove 16 adopt arc-shaped grooves, such as circular arc grooves. Then, the area circled by the second groove 24, the first groove 14 and the third groove 16 can surround a partial surface of the outer periphery of the main lifting oil cylinder 30.
[0039] Further, the dimension of the second reinforcing rib 23 in the height direction of the second column 21 is smaller than that of the second column 21 in the height direction, so there is a distance between the two ends of the second reinforcing rib 23 in the height direction and the corresponding ends of the second column 21 in the height direction.
[0040] For the three-stage gantry, it further includes an inner gantry 20 located in the innermost layer. The inner gantry 20 is in sliding fit with the inner gantry 20 located in the middle. Then, rotatable second rollers 28 can be arranged at both ends of the second column 21 in the height direction. The innermost inner gantry 20 includes two third columns 26 and two third connecting plates 27. The third columns 26 are made of H-shaped steel, and the two third connecting plates 27 are connected between the two third columns 26. It is in sliding fit with the corresponding side of the innermost inner gantry 20 through the second rollers 28.
[0041] In the gantry of the present invention, a first reinforcing rib 13 and a second reinforcing rib 23 are respectively arranged at the rear sides of the outer gantry 10 and the adjacent inner gantry 20, so that the first column 11 and the second column 21 are respectively of asymmetric structures, which increases the bending section modulus of the columns, thereby improving the stiffness and load-bearing capacity of the gantry and reducing shaking. In addition, a receiving space 29 is formed between the first reinforcing rib 13 and the second reinforcing rib 23 to accommodate the main lifting oil cylinder 30. The layout is compact and reasonable, and the main lifting oil cylinder 30 is positioned at a position outside the rear side of the gantry, which can also improve the operator's field of vision.
[0042] The above is only the specific implementation manner of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantive modification made to the present invention using this concept shall fall within the scope of infringement of the protection scope of the present invention.
Claims
1. A mast of a forklift, comprising an outer mast and at least one inner mast, wherein the inner mast is in sliding cooperation with the adjacent outer mast; characterized in that: A first reinforcing rib is disposed at the rear side of the outer mast, and a second reinforcing rib is disposed at the rear side of the inner mast adjacent to the outer mast, and an accommodating space is formed between the first reinforcing rib and the second reinforcing rib to accommodate a main lifting cylinder.
2. A forklift gantry according to claim 1, characterized in that: The outer door frame includes two first columns and two first connecting plates. The two first columns are arranged in parallel and spaced apart and have first rails arranged on the inner sides respectively. The two first connecting plates are respectively connected between the two ends of the first columns in the height direction. The first reinforcing ribs are formed on the rear side of the first columns and extend along the height direction of the first columns. The outer door frame adjacent to the inner door frame slides in cooperation with the first rails.
3. A forklift gantry according to claim 2, characterized in that: A first groove is arranged inside the first reinforcing rib, and the first groove extends along the height direction of the first column.
4. A forklift gantry as claimed in claim 2, characterized in that: A dimension of the first reinforcing rib in a height direction of the first column is smaller than a dimension of the first column in a height direction.
5. A forklift gantry as claimed in claim 2, characterized in that: A third reinforcing rib is further provided on the rear side of the first reinforcing rib, and the third reinforcing rib extends along the height direction of the first column.
6. A forklift mast as claimed in claim 5, characterized in that: A third groove is also provided on the inner side of the third reinforcing rib, and the third groove extends along the height direction of the first column.
7. A forklift mast as claimed in claim 6, characterized in that: The dimension of the third reinforcing rib in the height direction of the first column is smaller than the dimension of the first reinforcing rib in the height direction of the first column.
8. A forklift gantry as claimed in claim 1, characterized in that: The inner door frame adjacent to the outer door frame includes two second columns and two second connecting plates, the two second columns are arranged in parallel and spaced apart, and the two second connecting plates are respectively connected between the two ends of the second columns in the height direction; the second reinforcement ribs are formed on the rear side of the second columns and extend along the height direction of the second columns.
9. A forklift mast as claimed in claim 8, characterized in that: A second groove is provided on a side of the second reinforcing rib opposite to the first reinforcing rib, and the second groove extends along a height direction of the second column.
10. A forklift mast as claimed in claim 8, characterized in that: A dimension of the second reinforcing rib in a height direction of the second column is smaller than a dimension of the second column in a height direction.