Forklift portal frame

Abstract

The utility model relates to a forklift portal frame which comprises an outer portal frame, an inner portal frame arranged in the outer portal frame in a sliding mode, a pallet fork arranged on the inner portal frame and a driving part driving the outer portal frame to incline, a pin shaft frame is arranged on the outer portal frame, and the pin shaft frame is arranged below the driving part. The pin shaft frame and the driving piece are arranged on the side, away from the pallet fork, of the outer portal frame. Guide rails parallel to the length direction of the inner door frame are arranged on the side walls, close to the outer door frame, of the inner door frame and slide on the outer door frame, and the end, away from the pallet fork, of the inner door frame is arranged on the side, close to the driving piece, of the guide rails. The gravity center of the inner door frame is moved towards the direction of the driving piece, so that when the driving piece drives the outer door frame and the inner door frame to incline, the outer door frame and the inner door frame can incline by a larger angle under the condition that the force capable of being borne by the driving piece is not changed.

Description

Technical Field

[0001] This application relates to the technical field of forklifts, and particularly to a forklift mast. Background Art

[0002] In some areas, there are strict height limit regulations for trucks. Since forklifts also belong to the category of trucks, and at the same time, forklifts need to perform the task of unloading goods from high places, this may cause the overall height of the forklift mast to exceed the specified limit, thus affecting the use of the forklift.

[0003] Currently, it is usually adopted to tilt the mast of the forklift to reduce the height of the forklift, and when in use, the mast of the forklift is rotated to the vertical state. However, the current tilt angle of the forklift mast is usually between 6 and 12 degrees, and sometimes it still cannot meet the handling requirements and height limit regulations.

[0004] Therefore, a new technical solution is needed to solve the above problems. Summary of the Utility Model

[0005] In order to enable the outer mast to have a larger tilt angle, this application provides a forklift mast.

[0006] A forklift mast provided by this application adopts the following technical solutions:

[0007] A forklift mast includes an outer mast, an inner mast slidably arranged in the outer mast, a fork provided on the inner mast, and a driving member for driving the outer mast to tilt. A pin shaft frame is provided on the outer mast, the pin shaft frame is arranged below the driving member, and both the pin shaft frame and the driving member are arranged on the side of the outer mast away from the fork;

[0008] Guide rails parallel to the length direction of the inner mast are provided on the side walls of the inner mast close to the outer mast. The guide rails are arranged to slide on the outer mast, and one end of the inner mast away from the fork is arranged on the side of the guide rail close to the driving member.

[0009] By adopting the above technical solutions, the center of gravity of the inner mast is moved towards the direction of the driving member. Thus, when the driving member drives the outer mast and the inner mast to tilt, with the force that the driving member can bear remaining unchanged, the outer mast and the inner mast can tilt at a larger angle.

[0010] Optionally: Mounting brackets are further provided on the side walls of the outer mast away from each other. Mounting holes are provided on the mounting brackets, and one end of the driving member, the driving frame, is connected to the mounting holes.

[0011] By adopting the above technical solutions, the driving member is connected to the mounting bracket. After the installation part between the mounting bracket and the driving member is worn due to long-term use, the mounting bracket can be disassembled and replaced, enabling the outer mast to continue to be used normally.

[0012] Optionally, the number of the mounting holes is several, and the several mounting holes are arranged along the length direction of the outer gantry, and the driving member can be connected to different mounting holes.

[0013] By adopting the above technical solution, by connecting the driving member to different mounting holes, the overall inclination angle of the outer gantry can be changed without changing the driving member, so as to adapt to different working conditions.

[0014] Optionally, the pin shaft frame is arranged close to the lower end face of the outer gantry.

[0015] By adopting the above technical solution, when the outer gantry rotates along the pin shaft frame, the lower end of the outer gantry is not likely to move towards the forklift, so that the outer gantry will not contact the forklift after tilting, and the outer gantry can have a larger tilting angle.

[0016] Optionally, the fork includes a fixed part connected to the inner gantry and a movable part rotatably connected to the fixed part. The fixed part is arranged parallel to the length direction of the inner gantry, the movable part is arranged perpendicular to the fixed part, a contact block is fixed at the lower end of the fixed part, the contact block is arranged perpendicular to the fixed part, the upper end of the contact block abuts against the lower end of the movable part arranged perpendicular to the fixed part, and a limiting component for limiting the rotation of the movable part is further arranged on the fixed part, and the limiting component is connected to the movable part.

[0017] By adopting the above technical solution, when the outer gantry tilts, the movable part can be rotated towards the fixed part, so that the movable part and the fixed part approach each other to reduce the distance between the fork and the forklift, and thus it is no longer necessary to move the fork upward, and the outer gantry can have a larger tilting angle.

[0018] Optionally, the limiting component includes a connecting rod and fixed rods respectively arranged at the ends of the connecting rod. A limiting hole is formed at the upper end of the contact block, the fixed rod can be inserted into the limiting hole, and the connecting rod abuts against the side wall of the movable part far from the fixed part that rotates towards the fixed part.

[0019] By adopting the above technical solution, the position of the connecting rod is limited by the fixed rod, and then the connecting rod abuts against the movable part, so that the movable part will not move relative to the fixed part, and the position of the movable part is not likely to change after rotating towards the fixed part.

[0020] Optionally, fastening grooves parallel to each other are formed on the side walls of the fixed part and the movable part close to each other, and the fixed rods respectively penetrate through the fastening grooves on the fixed part and the movable part.

[0021] By adopting the above technical solution, with the fixed part and the movable part kept perpendicular, the fixed rods are respectively inserted into the fixed part and the movable part, so that the movable part will not rotate upward when subjected to force, enabling the forklift forks to stably drive the goods to move.

[0022] Optionally: the connecting rod is bent, the connecting rod is bent towards the space between the two fixed rods, and the two bent parts of the connecting rod are perpendicular to each other and can be attached to the fixed part and the movable part.

[0023] By adopting the above technical solution, after the movable part is perpendicular to the fixed part, the connecting rod will not protrude from the connection between the fixed part and the movable part, so that the loading of the goods is not easily affected.

[0024] In summary, the present application includes the following beneficial technical effects:

[0025] By moving the inner gantry towards the driving part and at the same time reducing the height of the pin shaft frame, the outer gantry can have a larger tilt angle, so that the overall height of the outer gantry will not exceed the height limit after the height increases. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of Embodiment 1 of the present application;

[0027] Figure 2 is a schematic diagram of the present application in Embodiment 1 for showing the positional relationship between the inner gantry and the outer gantry;

[0028] Figure 3 is a schematic diagram of Embodiment 2 of the present application for showing the forklift fork structure.

[0029] In the figure, 1. outer gantry; 11. guide groove; 12. first guide wheel; 13. second guide wheel; 14. pin shaft frame; 15. mounting frame; 151. mounting hole; 2. inner gantry; 21. guide rail; 3. forklift fork; 31. fixed part; 32. movable part; 33. abutting block; 331. limiting hole; 34. fastening groove; 4. driving part; 5. limiting component; 51. connecting rod; 52. fixed rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following further describes the present application in detail with reference to the accompanying drawings.

[0031] Embodiment 1, a forklift gantry disclosed in the present application, as Figure 1 and Figure 2As shown in the figure, it includes an outer gantry 1, an inner gantry 2 slidably arranged inside the outer gantry 1, a forklift fork 3 arranged on the inner gantry 2, and a driving member 4 for driving the outer gantry 1 to tilt towards the forklift fork 3. In this embodiment, the driving member 4 is selected as an oil cylinder, and the driving member 4 is arranged on the side of the outer gantry 1 away from the forklift fork 3. Guide rails 21 parallel to the length direction of the inner gantry 2 are arranged on two side walls of the inner gantry 2 close to the outer gantry 1. Guide grooves 11 for guiding the movement of the inner gantry 2 are formed on the inner wall of the outer gantry 1, and the guide rails 21 are arranged to move in the guide grooves 11. A first guide wheel 12 is rotatably connected at a position in the guide groove 11 close to the upper end face of the outer gantry 1. The first guide wheel 12 abuts against the side wall of the guide rail 21 close to the forklift fork 3, so that the side wall of the guide rail 21 away from the first guide wheel 12 abuts against the inner wall of the guide groove 11. A second guide wheel 13 is also installed in the guide groove 11, and the second guide wheel 13 abuts against the side wall of the inner gantry 2 close to the outer gantry 1. The side wall of the inner gantry 2 away from the forklift fork 3 is arranged on the side of the guide rail 21 close to the driving member 4, so that the whole of the inner gantry 2 and the forklift fork 3 deflects towards the side of the outer gantry 1 close to the driving member 4. Thus, when the outer gantry 1 tilts, the overall center of gravity can be close to the driving member 4, so that the outer gantry 1 can tilt more under the condition that the pressure borne by the driving member 4 remains unchanged.

[0032] Two pin shafts frames 14 are arranged on the side wall of the outer gantry 1 away from the forklift fork 3. The two pin shafts frames 14 are both arranged close to the lower end face of the outer gantry 1. The pin shafts frames 14 are used to connect to the forklift, so that when the outer gantry 1 rotates along the axis on the pin shafts frames 14, the distance that the lower end of the outer gantry 1 moves towards the forklift can be reduced. After the tilting angle of the outer gantry 1 increases, the lower end of the outer gantry 1 will not directly abut against the forklift, enabling the outer gantry 1 to tilt at a greater amplitude.

[0033] Mounting frames 15 are also installed on two side walls of the outer gantry 1 away from each other. One end of the mounting frame 15 extends towards the direction of the outer gantry 1 away from the forklift fork 3. A plurality of mounting holes 151 for connecting the driving member 4 are formed in the mounting frame 15. The mounting holes 151 are arranged along the length direction of the outer gantry 1. The piston rod of the driving member 4 can be connected to the mounting holes 151 through a pin shaft, so as to control different tilting angles of the outer gantry 1 by different positions of the connected mounting holes 151.

[0034] Embodiment 2, as Figure 3As shown in the figure, the difference from Embodiment 1 is that the fork 3 is no longer an integral structure. The fork 3 includes a fixed part 31 mounted on the inner gantry 2 and a movable part 32 rotatably connected to the fixed part 31. The fixed part 31 is arranged parallel to the length direction of the inner gantry 2, and the movable part 32 is arranged at the lower end of the fixed part 31 and perpendicular to the fixed part 31. A contact block 33 is further mounted at the lower end of the fixed part 31. The upper end of the contact block 33 can contact the lower end of the horizontally arranged movable part 32, so that the movable part 32 will not rotate downward when bearing a downward force, and the movable part 32 is not easily affected when lifting an object.

[0035] A limiting component 5 for limiting the rotation of the movable part 32 in the direction away from the movable part 32 is further arranged between the movable part 32 and the fixed part 31. The limiting component 5 includes a connecting rod 51 and fixed rods 52 respectively arranged at the ends of the connecting rod 51. The two fixed rods 52 are parallel to each other. Two limiting holes 331 are opened at the upper end of the contact block 33, and the fixed rod 52 is inserted into the limiting holes 331. When the movable part 32 is parallel to the fixed part 31, the connecting rod 51 can contact the position of the side wall of the movable part 32 away from the fixed part 31 and away from the contact block 33 as much as possible, so that the position of the movable part 32 relative to the fixed part 31 is not easily changed.

[0036] Fastening grooves 34 parallel to each other are opened on the side walls of the vertically arranged fixed part 31 and the movable part 32 close to each other. The fixed rod 52 can be respectively inserted into the fastening grooves 34 on the movable part 32 and the fixed part 31, so as to limit the relative position of the vertically arranged fixed part 31 and the movable part 32.

[0037] After the fixed rod 52 is inserted into the vertically arranged fixed part 31 and the movable part 32, the connecting rod 51 will block the included angle between the fixed part 31 and the movable part 32, thus affecting the transportation of goods. Therefore, the connecting rod 51 is bent. The connecting rod 51 is bent towards the space between the two fixed rods 52 and the two parts of the connecting rod 51 are perpendicular. And after the fixed rod 52 is inserted into the fastening groove 34, the two parts of the connecting rod 51 can respectively fit on the fixed part 31 and the movable part 32, so that no protrusion will be generated between the fixed part 31 and the movable part 32.

[0038] The implementation principle of this embodiment is as follows: when the outer door needs to be tilted, the connecting rod 51 and the fixed rod 52 are detached from the movable part 32 and the fixed part 31. Then the movable part 32 is rotated to contact the fixed part 31, and the fixed rod 52 is inserted into the limiting hole 331, so that the movable part 32 and the fixed part 31 are kept in a parallel state. Then the driving part 4 extends, so that the outer gantry 1 tilts away from the forklift.

[0039] The embodiments of the specific implementation manners are all preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A forklift mast, characterized in that: It includes an outer gantry (1), an inner gantry (2) slidably arranged inside the outer gantry (1), a fork (3) arranged on the inner gantry (2), and a driving member (4) for driving the inclination of the outer gantry (1). A pin shaft frame (14) is arranged on the outer gantry (1), and the pin shaft frame (14) is arranged below the driving member (4). Both the pin shaft frame (14) and the driving member (4) are arranged on the side of the outer gantry (1) away from the fork (3). Guide rails (21) parallel to the length direction of the inner gantry (2) are arranged on the side walls of the inner gantry (2) close to the outer gantry (1). The guide rails (21) slide on the outer gantry (1), and one end of the inner gantry (2) away from the fork (3) is arranged on the side of the guide rail (21) close to the driving member (4).

2. A forklift mast according to claim 1, characterized in that: Mounting brackets (15) are further arranged on the side walls of the outer gantry (1) away from each other. Mounting holes (151) are arranged on the mounting brackets (15), and one end of the driving member (4) is drivingly connected to the mounting hole (151).

3. A forklift mast according to claim 2, characterized in that: The number of the mounting holes (151) is several, and several of the mounting holes (151) are arranged along the length direction of the outer gantry (1). The driving member (4) can be connected to different mounting holes (151).

4. A forklift mast according to claim 1, characterized in that: The pin shaft frame (14) is arranged close to the lower end face of the outer gantry (1).

5. A forklift mast according to claim 1, characterized in that: The fork (3) includes a fixed part (31) connected to the inner gantry (2) and a movable part (32) rotatably connected to the fixed part (31). The fixed part (31) is arranged parallel to the length direction of the inner gantry (2), and the movable part (32) is arranged perpendicular to the fixed part (31). An abutting block (33) is fixed at the lower end of the fixed part (31), and the abutting block (33) is arranged perpendicular to the fixed part (31). The upper end of the abutting block (33) abuts against the lower end of the movable part (32) arranged perpendicular to the fixed part (31). A limiting component (5) for limiting the rotation of the movable part (32) is further arranged on the fixed part (31), and the limiting component (5) is connected to the movable part (32).

6. The forklift mast according to claim 5, characterized in that: The limiting component (5) includes a connecting rod (51) and fixed rods (52) respectively arranged at the ends of the connecting rod (51). A limiting hole (331) is opened at the upper end of the abutting block (33), and the fixed rod (52) can be inserted into the limiting hole (331). The connecting rod (51) abuts against the side wall of the movable part (32) away from the fixed part (31) and rotating towards the fixed part (31).

7. A forklift mast according to claim 6, characterized in that: Fastening grooves (34) parallel to each other are opened on the side walls of the fixed part (31) and the movable part (32) close to each other, and the fixed rods (52) are respectively inserted into the fastening grooves (34) on the fixed part (31) and the movable part (32).

8. A forklift mast according to claim 7, characterized in that: The connecting rod (51) is bent, and the connecting rod (51) bends towards the space between the two fixed rods (52). The two bent parts of the connecting rod (51) are perpendicular to each other and can be attached to the fixed part (31) and the movable part (32).

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