Telescopic forklift portal frame

Abstract

The utility model discloses a telescopic forklift portal frame which comprises a fork arm carrier body, an installation rod is fixedly connected to the fork arm carrier body, two fork pieces are connected to the installation rod in a sliding and sleeved mode, a driving shaft is rotatably installed on the fork arm carrier body, the driving shaft comprises a polished shaft part and screw rod parts symmetrically arranged on the two sides of the polished shaft part, and the screw rod parts are connected with the polished shaft part. Ball sleeves are mounted at the tops of the pallet fork pieces, the screw rod parts penetrate through the tops of the pallet fork pieces and are matched with the ball sleeves, and the two pallet fork pieces can be driven to move in the opposite directions or in the opposite directions in the axial direction of the mounting rod along with rotation of the screw rod parts; a driving assembly for driving the driving shaft to rotate is arranged on the fork arm carrier main body; the motor controls the driving shaft to rotate to drive the pallet fork pieces to move synchronously, the distance between the pallet forks can be efficiently adjusted, the working efficiency is improved, manual intervention is reduced, and operation safety is ensured.

Description

Technical Field

[0001] This utility model belongs to the technical field of logistics and warehousing equipment, and in particular relates to a telescopic forklift mast. Background Technology

[0002] In the logistics and warehousing industry, forklifts are the primary means of goods handling, and their performance and flexibility directly affect the efficiency of warehouse operations. Traditional forklift mast designs typically include a fixed vertical support and one or more adjustable crossbeams, with the forks mounted at the ends of the crossbeams. This design allows forklift operators to move goods of varying heights by raising and lowering the crossbeams. However, when handling goods of different widths or lengths, adjusting the spacing between the forks becomes crucial.

[0003] Existing forklift masts have significant shortcomings in adjusting fork spacing. Most designs rely on operators manually adjusting the fork position, which typically involves loosening fixing bolts, moving the forks to the new position, and then retightening the bolts. This manual adjustment method is not only time-consuming and labor-intensive, but also requires operators to have a certain level of skill and physical strength, and poses safety hazards. Furthermore, frequent manual adjustments can lead to inaccurate fork positioning, affecting operational efficiency and cargo safety. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a telescopic forklift mast that can efficiently adjust the fork spacing, improve operating efficiency, reduce manual intervention, and ensure operational safety.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a telescopic forklift mast, including a fork carriage body, a mounting rod fixedly connected to the fork carriage body, two fork pieces slidably sleeved on the mounting rod, a drive shaft rotatably mounted on the fork carriage body, the drive shaft including a shaft portion and screw portions symmetrically arranged on both sides of the shaft portion, ball bearing sleeves mounted on the top of each fork piece, the screw portions passing through the top of each fork piece and cooperating with the ball bearing sleeves, and as the screw portions rotate, driving the two fork pieces to move towards or away from each other along the axial direction of the mounting rod; the fork carriage body is provided with a drive assembly for driving the drive shaft to rotate; by controlling the rotation of the drive shaft with a motor, the fork pieces can be moved synchronously, which can efficiently adjust the fork spacing, improve operating efficiency, reduce manual intervention, and ensure operational safety.

[0006] Preferably, the drive assembly includes a driven bevel gear disposed on the optical shaft, a drive motor disposed on the fork carriage body, and a driving bevel gear disposed on the output shaft of the drive motor. The driving bevel gear and the driven bevel gear mesh, and the drive motor is signal-connected to the control system.

[0007] Preferably, the fork carriage body is provided with several intermediate support plates, and the optical axis and mounting rod pass through the intermediate support plates.

[0008] Preferably, the fork assembly is further provided with a load-bearing plate, the load-bearing plate is provided with a load-bearing groove, and the fork assembly is provided with a load-bearing block, the load-bearing block being inserted into the load-bearing groove and being movable relative to the load-bearing groove.

[0009] Preferably, the bottom of the load-bearing block is provided with load-bearing rollers.

[0010] Preferably, one end of the load-bearing block passes through the load-bearing groove and is fixedly connected to a limiting plate, the height of which is greater than the height of the load-bearing groove.

[0011] The technical advantages of this invention are as follows: by setting up a drive shaft and ball bearing sleeve, the motor controls the rotation of the drive shaft, which drives the fork components to move synchronously. This can efficiently adjust the fork spacing, improve work efficiency, reduce manual intervention, and ensure operational safety. Attached Figure Description

[0012] Figure 1 This is a first structural schematic diagram of the present invention.

[0013] Figure 2 This is a schematic diagram of the second structure of the present invention.

[0014] Figure 3 This is a schematic diagram of the third structure of this utility model.

[0015] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0016] The reference numerals for the main technical features in the figure are as follows: 1. Fork carriage body; 11. Base frame; 12. First hydraulic cylinder; 13. Second hydraulic cylinder; 14. Lifting frame; 2. Mounting rod; 3. Fork assembly; 4. Drive shaft; 41. Screw section; 42. Screw section; 5. Intermediate support plate; 6. Ball bearing sleeve; 71. Driven bevel gear; 72. Drive motor; 73. Driven bevel gear; 81. Load-bearing plate; 82. Load-bearing groove; 83. Load-bearing block; 85. Limiting plate. Detailed Implementation

[0017] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0018] like Figures 1-4As shown, a telescopic forklift mast includes a fork carriage body 1, which is existing technology. It generally includes a base frame 11 hinged to the forklift body, a first hydraulic cylinder 12 that can drive the base frame 11 to rotate, a lifting frame 14 that is slidably connected to the base frame 11, and a second hydraulic cylinder 13 that drives the lifting frame 14 to move up and down. The first hydraulic cylinder 12 is generally hinged at one end to the forklift body and at the other end to the base frame 11. The second hydraulic cylinder 13 is generally mounted on the base frame 11, and its output end is fixed to the lifting frame 14 to drive the lifting frame 14 to move up and down.

[0019] Specifically, the lifting frame 14 is provided with a mounting rod 2. The mounting rod can be a round rod or other polygonal straight rod. Two fork pieces are hung side by side on the mounting rod, and the fork pieces are slidably sleeved on the mounting rod.

[0020] Furthermore, a drive shaft 4 is rotatably mounted on the lifting frame 14. The drive shaft 4 is located below the mounting rod 2 and includes a shaft portion 41 and a screw portion 42. Two support plates are symmetrically fixed to the center of the lifting frame 14. The shaft portion 41 and the mounting rod 2 pass through the intermediate support plate 5. Both ends of the shaft portion 41 pass through the intermediate support plate 5 and are respectively fixed with screw portions 42. The ends of the shaft portion 41 are rotatably connected to the two side frame rods of the lifting frame 14. The two screw portions 42 are symmetrically arranged. Rollers are fixedly mounted on the fork assembly 3. The ball sleeve 6, with the screw portion 42 passing through the top of the fork member 3 and engaging with it, forms a ball screw drive mechanism. A driven bevel gear 71 is fixedly connected to the optical shaft portion 41. A drive motor 72 is mounted on the lifting frame 14. The drive motor 72 is existing technology, a geared motor commonly used in high-load environments. A driving bevel gear 73 is fixedly connected to its output shaft, and the driving bevel gear 73 meshes with the driven bevel gear 71. The drive motor 72 is connected to a control system signal, which is existing technology, commonly used in forklift control systems. In other embodiments, the ball screw drive mechanism can be replaced with a worm gear drive mechanism.

[0021] Furthermore, a load-bearing plate 81 is fixedly installed on the lifting frame 14. The load-bearing plate 81 is located below the drive shaft 4 and in the area near the bottom of the fork 3. Load-bearing grooves 82 are symmetrically opened on both sides of the plate. A load-bearing block 83 is fixedly connected to the back of the fork 3. The joint between the load-bearing block 83 and the fork 3 is provided with a rounded chamfer transition. The bottom of the load-bearing block 83 is provided with a load-bearing roller. The load-bearing block 83 is inserted into the load-bearing groove 82 and can move relative to the load-bearing groove 82. The load-bearing roller makes rolling contact with the load-bearing groove 82. One end of the load-bearing block 83 passes through the load-bearing groove 82 and is fixedly connected to a limiting plate 85. The height of the limiting plate 85 is greater than the height of the load-bearing groove 82 to restrict the separation of the load-bearing block 83 and the load-bearing groove 82.

[0022] The specific implementation process of this utility model is as follows: When it is necessary to adjust the distance between the fork pieces 3, press the button of the control system to drive the drive motor 72 to run, and drive the drive shaft 4 to move, thereby driving the fork pieces 3 to move relative to or away from each other, so as to achieve fast, efficient and safe adjustment of the fork pieces 3.

[0023] The above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. The present utility model can be used in similar products. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A telescopic forklift mast, characterized in that: The fork carriage includes a fork carriage body (1), on which a mounting rod (2) is fixedly connected. Two fork pieces (3) are slidably sleeved on the mounting rod (2). A drive shaft (4) is rotatably mounted on the fork carriage body (1). The drive shaft (4) includes a shaft portion (41) and screw portions (42) symmetrically arranged on both sides of the shaft portion (41). A ball bearing sleeve (6) is installed on the top of each fork piece (3). The screw portions (42) pass through the top of each fork piece (3) and cooperate with the ball bearing sleeve (6). As the screw portions (42) rotate, they can drive the two fork pieces (3) to move towards or away from each other along the axial direction of the mounting rod (2). The fork carriage body (1) is provided with a drive assembly for driving the drive shaft (4) to rotate.

2. The telescopic forklift mast according to claim 1, characterized in that: The drive assembly includes a driven bevel gear (71) on the optical shaft (41), a drive motor (72) on the fork carriage body (1), and a driving bevel gear (73) on the output shaft of the drive motor (72). The driving bevel gear (73) and the driven bevel gear (71) mesh. The drive motor (72) is connected to the control system signal.

3. The telescopic forklift mast according to claim 1, characterized in that: The fork carriage body (1) is provided with several intermediate support plates (5), and the optical axis (41) and the mounting rod (2) pass through the intermediate support plates (5).

4. A telescopic forklift mast according to claim 1, characterized in that: The fork assembly (3) is also provided with a load-bearing plate (81), the load-bearing plate (81) is provided with a load-bearing groove (82), the fork assembly (3) is provided with a load-bearing block (83), the load-bearing block (83) is inserted into the load-bearing groove and can move relative to the load-bearing groove (82).

5. A telescopic forklift mast according to claim 4, characterized in that: The load-bearing block (83) is provided with load-bearing rollers, and the load-bearing rollers are in contact with the groove surface of the load-bearing groove (82).

6. A telescopic forklift mast according to claim 4, characterized in that: One end of the load-bearing block (83) passes through the load-bearing groove (82) and is fixedly connected to a limiting plate (85), the height of the limiting plate (85) being greater than the height of the load-bearing groove (82).

7. A telescopic forklift mast according to claim 4, characterized in that: The joint between the load-bearing block (83) and the fork (3) is provided with a rounded chamfer transition.

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