Forklift portal frame stabilizing structure

Abstract

The utility model relates to a forklift portal frame stabilizing structure which comprises an outer portal frame, a pallet fork arranged on the outer portal frame in a sliding mode, a guide assembly vertically sliding on the outer portal frame and a driving piece driving the guide assembly to vertically move, a plurality of lifting wheels are arranged on the guide assembly, and a connecting piece is arranged between the outer portal frame and the pallet fork. The distance between the highest end of the pallet fork and the position where the connecting piece is connected to the pallet fork is smaller than the distance between the lower end of the lifting wheel located at the limit height and the upper end of the outer portal frame. Under the condition that the inner portal frame is not arranged, the guide assembly is used for driving the connecting piece to move so as to drive the pallet fork to move upwards, and meanwhile, the upper end of the pallet fork cannot be higher than the upper end face of the outer portal frame after the pallet fork reaches the limit position by limiting the displacement distance and the height of the guide assembly.

Description

Technical Field

[0001] The present application relates to the technical field of forklifts, and in particular to a forklift mast stabilizing structure. Background Art

[0002] Forklifts are important logistics handling equipment, and their gantry structure is a key part that affects the performance of forklifts. A conventional gantry is composed of an outer gantry and an inner gantry. The fork is set on the inner gantry, and the inner gantry is driven to move vertically by the driving assembly, thereby synchronously driving the fork to move vertically. When the inner gantry drives the fork to move vertically, when the height that the fork needs to lift increases, the upper end of the inner gantry will be higher than the upper end of the outer gantry. When used in some places with height restrictions, the inner gantry will rise higher than the limited height and a collision will occur, affecting the normal use of the forklift.

[0003] Therefore, it is necessary to propose a new technical solution to solve the above problems. Utility Model Content

[0004] In order to ensure that the upper end of the fork does not exceed the upper end surface of the outer mast after the fork moves upward and reaches the limit position, the present application provides a forklift mast stabilizing structure.

[0005] The present application provides a forklift gantry stabilizing structure, which adopts the following technical solutions:

[0006] A forklift mast stabilizing structure comprises an outer mast, a fork slidably arranged on the outer mast, a guide assembly slidably arranged on the outer mast, and a driving member driving the guide assembly to move vertically, wherein a plurality of lifting wheels are arranged on the guide assembly, and a connecting member is arranged between the outer mast and the fork, wherein the connecting member bypasses the upper end of the lifting wheel and slidably cooperates with the lifting wheel, and the distance between the highest end of the fork and the position where the connecting member is connected to the fork is smaller than the distance between the lower end of the lifting wheel at the limit height and the upper end of the outer mast.

[0007] By adopting the above technical solution, in the case where an inner mast is not set, the guide assembly is used to drive the connecting member to move and thus drive the fork to move upward. At the same time, the displacement distance and height of the guide assembly are also limited, so that after the fork reaches the limit position, the upper end of the fork will not be higher than the upper end surface of the outer mast.

[0008] Optionally: the guide assembly includes a guide frame, a plurality of first guide wheels respectively arranged at both ends of the guide frame, and a plurality of second guide wheels, and vertically arranged guide rails are respectively arranged on the side walls of the outer door frame that are away from each other, and the first guide wheel and the second guide wheel are respectively abutted against the side walls of the guide rails that are away from each other and adjacent to the outer door frame.

[0009] By adopting the above technical solution, the first guide wheel and the second guide wheel are used to abut against the guide rail, so as to limit the horizontal position of the guide assembly in two directions, so that the guide assembly can move stably vertically along the outer door frame.

[0010] Optionally: a plurality of third guide wheels are respectively provided at both ends of the guide frame, and the third guide wheels abut against the side wall of the guide track away from the outer door frame.

[0011] By adopting the above technical solution, the third guide wheel is used to limit the position of the guide assembly in two directions on the horizontal plane again, so that when the guide assembly is vertically displaced along the outer door frame, the guide assembly will not produce a horizontal position, so that the guide assembly can move vertically stably.

[0012] Optional: The guide frame includes an upper guide plate, a lower guide plate and two limit plates arranged therebetween, the limit plates are respectively arranged at the two ends of the upper guide plate and the lower guide plate and connect the upper guide plate and the lower guide plate, the first guide wheel, the second guide wheel and the third guide wheel are all arranged on the limit plates, an installation plate is arranged between the upper guide plate and the lower guide plate, and the lifting wheel is rotatably connected to the installation plate.

[0013] By adopting the above technical solution, the upper guide plate, the lower guide plate, the limit plate and the mounting plate can form a stable shape, so that the guide assembly is not easily deformed when subjected to force. At the same time, the lifting wheel is arranged between the upper guide plate and the lower guide plate, so that the connecting part is not easily detached from the lifting wheel.

[0014] Optionally: the driving member is fixed to the lower end of the outer door frame, and the driving end of the driving member is passed through the lower guide plate and fixed to the upper guide plate.

[0015] By adopting the above technical solution, the driver can directly apply force to the upper guide plate when pushing the guide assembly to move, so that the upper guide plate produces vertical movement, and the lower guide plate is driven to move by the upper guide plate without transmitting the force from bottom to top, so that the force applied to the guide assembly can be stably kept vertical, making the vertical displacement of the guide assembly smoother.

[0016] Optionally, the rotation axis of the lifting wheel and the axis of the free end of the driving member are in the same vertical plane.

[0017] By adopting the above technical solution, the upward force and the downward force acting on the guide assembly are in the same vertical plane, so that the forces acting on the guide assembly can offset each other without causing deflection, and the guide assembly can stably move vertically along the outer door frame.

[0018] Optionally: a plurality of first limiting wheels and a plurality of second limiting wheels are arranged on the fork, and guide grooves are arranged on the inner walls of the outer door frame, the first limiting wheels are arranged in the guide grooves and abut against two inner walls of the guide grooves which are away from each other, and the second limiting wheels abut against the inner wall of the guide groove which is away from its own opening.

[0019] By adopting the above technical solution, the first limiting wheel and the second limiting wheel are used to limit the vertical movement of the fork, so that the fork can move stably along the outer mast.

[0020] Optionally: The outer door frame is also provided with an adjustment assembly for limiting the upward distance of the guide assembly, the adjustment assembly includes an adjustment plate arranged on the outer door frame and a plurality of adjustment bolts for limiting the position of the adjustment plate, the adjustment plate is arranged above the guide assembly, the adjustment bolts pass through the adjustment plate and are connected to the outer door frame, and the upper end of the adjustment plate can abut against the upper end of the guide assembly.

[0021] By adopting the above technical solution, after the overall height of the fork is changed by installing accessories on the fork, the moving distance of the guide assembly can be limited by adjusting the height of the adjustment plate, so that the upper end of the fork can still be lower than the upper end surface of the outer frame when it rises to the limit position.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The guide assembly is used to push the fork to move vertically, and the distance between the highest end of the fork and the position where the connecting piece is connected to the fork is smaller than the distance between the lower end of the lifting wheel at the limit height and the upper end of the outer mast. Therefore, after the fork moves to the limit height, the upper end of the fork will not be higher than the upper end surface of the outer mast, so that it can be used at the height-limited position;

[0024] 2. By aligning the axis of the lifting wheel and the axis of the driving member in the same vertical plane, the forces acting on the guide assembly are kept vertical and can offset each other, so that the resultant force of the forces acting on the guide assembly can be kept vertical, thereby enabling the guide assembly to stably move vertically along the outer door frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of Example 1 of the present application;

[0026] Figure 2 This is a schematic diagram of the structure of the guide assembly for displaying the embodiment 1 of the present application;

[0027] Figure 3 This is a schematic diagram for illustrating the connection structure between the fork and the outer mast in Example 1 of the present application;

[0028] Figure 4This is a schematic diagram for illustrating the structure of the adjustment component according to Example 2 of the present application.

[0029] In the figure, 1, outer door frame; 11, fork; 12, connecting piece; 13, guide rail; 14, first limiting wheel; 15, second limiting wheel; 16, guide groove; 17, threaded hole; 2, guide assembly; 21, guide frame; 211, upper guide plate; 212, lower guide plate; 213, limiting plate; 214; mounting plate; 22, first guide wheel; 23, second guide wheel; 24, third guide wheel; 25, lifting wheel; 3, driving piece; 4, adjustment assembly; 41, adjustment plate; 42, adjustment bolt. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings.

[0031] The present application discloses a forklift gantry stabilizing structure, embodiment 1, as shown in Figure 1 As shown, it includes an outer mast 1, a fork 11 arranged on the outer mast 1, a guide assembly 2 vertically sliding on the outer mast 1 and a driving member 3 driving the guide assembly 2 to move vertically, and the fork 11 and the guide assembly 2 are respectively arranged on both sides of the outer mast 1.

[0032] Two lifting wheels 25 are provided on the guide assembly 2, and the axes of the two lifting wheels 25 coincide. A connecting member 12 is commonly provided on the outer mast 1 and the fork 11. In this embodiment, the connecting member 12 is a chain, one end of the connecting member 12 is fixed to the lower end of the outer mast 1, and the other end of the connecting member 12 is fixed to the fork 11. The connecting member 12 bypasses the top of the lifting wheel 25, and the distance between the highest end of the fork 11 and the position where the connecting member 12 is connected to the fork 11 is smaller than the distance between the lower end of the lifting wheel 25 at the limit height and the upper end of the outer mast 1, so that in the process of the driving member 3 driving the guide assembly 2 to move vertically, the fork 11 can also be driven to move vertically, and when the guide assembly 2 moves to the highest point, the upper end of the fork 11 will not be higher than the upper end of the outer mast 1.

[0033] like Figure 1 and Figure 2As shown, the guide assembly 2 includes a guide frame 21, a plurality of first guide wheels 22 and a plurality of second guide wheels 23 respectively arranged at both ends of the guide frame 21, the guide frame 21 is arranged horizontally, and the guide frame 21 includes a horizontally arranged upper guide plate 211, a horizontally arranged lower guide plate 212 and two limit plates 213 arranged therebetween, the two limit plates 213 are installed between the upper guide plate 211 and the lower guide plate 212 and are respectively close to the upper guide plate 211 and the ends of the guide plates. The first guide wheel 22 and the second guide wheel 23 are both installed on the limit plate 213, and two first guide wheels 22 and two second guide wheels 23 are arranged on the same limit plate 213. The outer door frame 1 is vertically arranged on two side walls that are far away from each other, and the first guide wheel 22 and the second guide wheel 23 are arranged on both sides of the guide track 13 in the length direction, and the first guide wheel 22 and the second guide wheel 23 are respectively abutted against the side walls of the guide track 13 that are adjacent to the outer door frame 1 and far away from each other. A third guide wheel 24 is also respectively installed on the two limit plates 213, and the third guide wheel 24 is passed through the limit plates 213 and abuts against the side wall of the guide track 13 away from the outer door frame 1. The axes of the first guide wheel 22, the second guide wheel 23 and the third guide wheel 24 are all arranged horizontally, so that the first guide wheel 22, the second guide wheel 23 and the third guide wheel 24 are used to limit the position of the guide assembly 2 in the horizontal direction, so that the guide assembly 2 only produces vertical displacement when moving along the guide track 13.

[0034] like Figure 1 As shown, two mounting plates 214 are installed between the upper guide plate 211 and the lower guide plate 212. The two mounting plates 214 are vertically arranged with a gap between them, and the distance between the two mounting plates 214 and the nearest limit plate 213 is equivalent. The lifting wheels 25 are respectively installed on the side walls of the two mounting plates 214 close to each other, and the axes of the lifting wheels 25 arranged on the two mounting plates 214 coincide. In this embodiment, the driving member 3 uses a hydraulic cylinder, the cylinder body of the driving member 3 is installed at the lower end of the outer door frame 1, and the piston rod of the driving member 3 is passed through the lower guide plate 212 and installed at the lower end of the upper guide plate 211, and the piston rod of the driving member 3 passing through the lower guide plate 212 is left with a gap between the lower guide plate 212 and the piston rod of the driving member 3. The driving member 3 is respectively arranged on both sides of the two limit plates 213 that are far away from each other. The axis of the piston rod of the driving member 3 and the axis of the lifting wheel 25 are in the same vertical plane. Therefore, when the driving member 3 drives the guide assembly 2 to move vertically, the force applied by the driving member 3 to the guide assembly 2 is opposite to the pressure applied by the fork 11 to the guide assembly 2, but the position of the force is located between the two driving members 3, so that the force applied to the guide assembly 2 is not easy to be deflected, so that the guide assembly 2 can move stably in the vertical position.

[0035] like Figure 3As shown, the fork 11 is also provided with a plurality of first limiting wheels 14 and a plurality of second limiting wheels 15. A vertically arranged guide groove 16 is provided on two inner walls of the outer mast 1 that are away from each other. In this embodiment, the number of the first limiting wheels 14 and the second limiting wheels 15 is two. The first limiting wheel 14 is installed on the fork 11, and the first limiting wheel 14 is respectively arranged in one guide groove 16, and the side wall of the first limiting wheel 14 abuts against the two side walls of the guide groove 16 that are away from each other. The second limiting wheel 15 is installed on the fork 11, and the second limiting wheel 15 is arranged lower than the first limiting wheel 14, and the side wall of the second limiting wheel 15 abuts against the inner wall of the guide groove 16 that is away from its own opening. The axes of the first limiting wheel 14 and the second limiting wheel 15 are both arranged horizontally. The first limiting wheel 14 and the second limiting wheel 15 are used to limit the movement of the fork 11 relative to the outer mast 1, so that the fork 11 can move stably vertically along the outer mast 1.

[0036] The implementation principle of this embodiment is: when the fork 11 needs to move, the piston rod of the driving member 3 moves to drive the guide assembly 2 to produce a vertical displacement along the outer mast 1. When the guide assembly 2 moves upward, it drives the connecting member 12 to move upward, thereby causing the fork 11 to move upward. When the guide assembly 2 moves downward, it drives the connecting member 12 to move downward, and the fork 11 moves downward under the action of gravity.

[0037] Embodiment 2, as Figure 4 As shown, the difference from Example 1 is that an adjustment assembly 4 for limiting the upward displacement distance of the guide assembly 2 is also provided on the outer mast 1, and the adjustment assembly 4 includes an adjustment plate 41 provided on the outer mast 1 and an adjustment bolt 42 for limiting the position of the adjustment plate 41. A plurality of threaded holes 17 are provided on the outer mast 1 in the vertical direction, and the adjustment bolts 42 are passed through the adjustment plate 41 and threadedly matched with the threaded holes 17, so that the vertical height of the adjustment plate 41 can be adjusted. The adjustment plate 41 is provided above the guide assembly 2, so that after the guide assembly 2 moves upward, the upper guide plate 211 can abut against the adjustment plate 41 to limit the upward movement of the guide assembly 2, and after the height of the fork 11 is increased due to the addition of accessories, the distance of the upward movement of the guide assembly 2 can be limited, so that the upper end of the fork 11 will still not be higher than the outer mast 1.

[0038] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A forklift mast stabilizing structure, characterized in that: The invention comprises an outer door frame (1), a fork (11) slidably arranged on the outer door frame (1), a guide assembly (2) slidably arranged on the outer door frame (1), and a driving member (3) driving the guide assembly (2) to move vertically, wherein a plurality of lifting wheels (25) are arranged on the guide assembly (2), a connecting member (12) is arranged between the outer door frame (1) and the fork (11), the connecting member (12) bypasses the upper end of the lifting wheel (25) and slidably cooperates with the lifting wheel (25), and the distance between the highest end of the fork (11) and the position where the connecting member (12) is connected to the fork (11) is smaller than the distance between the lower end of the lifting wheel (25) at the limit height and the upper end of the outer door frame (1).

2. A forklift mast stabilizing structure according to claim 1, characterized in that: The guide assembly (2) comprises a guide frame (21), a plurality of first guide wheels (22) respectively arranged at both ends of the guide frame (21), and a plurality of second guide wheels (23); side walls of the outer door frame (1) which are away from each other are respectively provided with vertically arranged guide rails (13); the first guide wheel (22) and the second guide wheel (23) respectively abut against the side walls of the guide rails (13) which are away from each other and adjacent to the outer door frame (1).

3. A forklift mast stabilizing structure according to claim 2, characterized in that: A plurality of third guide wheels (24) are respectively arranged at both ends of the guide frame (21), and the third guide wheels (24) abut against the side wall of the guide track (13) away from the outer door frame (1).

4. A forklift mast stabilizing structure according to claim 3, characterized in that: The guide frame (21) comprises an upper guide plate (211), a lower guide plate (212) and two limiting plates (213) arranged therebetween. The limiting plates (213) are respectively arranged at two ends of the upper guide plate (211) and the lower guide plate (212) and connect the upper guide plate (211) and the lower guide plate (212). The first guide wheel (22), the second guide wheel (23) and the third guide wheel (24) are all arranged on the limiting plates (213). A mounting plate (214) is arranged between the upper guide plate (211) and the lower guide plate (212). The lifting wheel (25) is rotatably connected to the mounting plate (214).

5. A forklift mast stabilizing structure according to claim 4, characterized in that: The driving member (3) is fixed to the lower end of the outer door frame (1); the driving end of the driving member (3) is passed through the lower guide plate (212) and is fixed to the upper guide plate (211).

6. A forklift mast stabilizing structure according to claim 1, characterized in that: The rotation axis of the lifting wheel (25) and the axis of the free end of the driving member (3) are in the same vertical plane.

7. The forklift mast stabilizing structure according to claim 1, characterized in that: The fork (11) is provided with a plurality of first limiting wheels (14) and a plurality of second limiting wheels (15); the inner wall of the outer door frame (1) is provided with a guide groove (16); the first limiting wheel (14) is arranged in the guide groove (16) and abuts against two inner walls of the guide groove (16) that are away from each other; the second limiting wheel (15) abuts against the inner wall of the guide groove (16) that is away from its own opening.

8. The forklift mast stabilizing structure according to claim 1, characterized in that: The outer door frame (1) is also provided with an adjustment assembly (4) for limiting the upward distance of the guide assembly (2), the adjustment assembly (4) comprises an adjustment plate (41) provided on the outer door frame (1) and a plurality of adjustment bolts (42) for limiting the position of the adjustment plate (41), the adjustment plate (41) is provided above the guide assembly (2), the adjustment bolts (42) pass through the adjustment plate (41) and are connected to the outer door frame (1), and the upper end of the adjustment plate (41) can abut against the upper end of the guide assembly (2).

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