Forklift portal anti-overtravel device

Abstract

The utility model belongs to the technical field of forklift protection, when a steel fork is about to slide out of a forklift portal frame, a protection beam intercepts the steel fork to prevent the steel fork from exceeding a due stroke, and when the steel fork collides with the protection beam, the steel fork drives a supporting plate to move upwards through a transmission assembly to prevent the steel fork from sliding out of the forklift portal frame. A supporting plate drives a movable plate to move upwards together through a connecting column, the supporting plate and the connecting column extrude damping liquid in a movable groove at the same time, the pressure intensity of the damping liquid in the movable groove is changed, and the damping liquid flows to the other side through a circular groove of the movable plate; meanwhile, the damping liquid flows to the side, away from the movable plate, in the movable groove again through the square groove of the supporting plate, friction force can be generated when the damping liquid passes through the circular groove of the movable plate and the square groove of the supporting plate, the generated friction force can generate impact force on collision between the steel fork and the protection beam, and the damage degree of the protection beam is reduced; by means of the structure, the service life of an existing overtravel prevention device is prolonged to a certain degree.

Description

Technical Field

[0001] This utility model relates to the field of forklift protection technology, specifically a forklift mast anti-overrun device. Background Technology

[0002] Forklifts are industrial handling vehicles primarily used for loading, unloading, stacking, and short-distance transport of goods such as pallets. They are very common in warehouses, logistics centers, manufacturing plants, and other locations where heavy objects need to be moved frequently. Forklifts are designed in a variety of ways to adapt to different operational needs, such as indoor and outdoor use, handling of goods of different weights, and operation in special environments.

[0003] Existing forklifts are basically composed of steel forks and a mast. The steel forks can move up and down within the mast and are used to move goods. To ensure the stability of the equipment, manufacturers have installed anti-overrun devices on the mast to prevent the steel forks from accidentally detaching from the mast. Existing anti-overrun devices are basically protective beams, which are fixed inside the mast. The protective beam limits the movement trajectory of the steel forks and prevents the steel forks from detaching from the mast. However, due to the function of the protective beam, the limiting action is basically achieved by the steel forks colliding with the protective beam. The protective beam, through its own stability, intercepts the moving steel forks to prevent them from detaching from the mast. This situation can cause serious damage to the protective beam, which to some extent reduces its service life. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a forklift mast anti-overrun device, which solves the problem that existing limiters primarily work by having the steel fork collide with the protective beam, and the protective beam uses its own stability to intercept the moving steel fork and prevent it from detaching from the mast. This situation can lead to serious damage to the protective beam, which to some extent reduces the service life of the protective beam.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a forklift mast anti-overrun device, which is fixedly installed inside the forklift mast. The forklift mast is provided with a steel fork that can move up and down. The anti-overrun device includes a protective beam, which is fixedly installed inside the forklift mast. The protective beam has a movable groove inside, and a protective mechanism is installed inside the movable groove.

[0006] The protective mechanism includes a transmission assembly located at the bottom of the protective beam. The bottom of the transmission assembly is slidably connected to the top of the steel fork, and the top of the transmission assembly extends into the interior of the movable groove. The transmission assembly is slidably connected to the movable groove. A support plate is fixedly provided at the top of the transmission assembly. The top of the support plate has multiple square grooves. Two connecting columns are fixedly provided at the top of the support plate. Movable plates are provided at the tops of the two connecting columns. The movable plates are fixedly connected to the tops of the two connecting columns. The tops of the movable plates have multiple circular grooves.

[0007] As a preferred technical solution of this utility model, the transmission assembly includes two transmission columns, which are located at the bottom of the protective beam. The top ends of the two transmission columns extend into the interior of the movable groove. The two transmission columns are slidably connected to the movable groove. The top ends of the two transmission columns are fixedly connected to the bottom of the support plate. The bottom ends of the two connecting columns are slidably connected to the top of the steel fork.

[0008] As a preferred technical solution of this utility model, the outer surfaces of the two connecting columns are fitted with annular sealing gaskets, the tops of the two annular sealing gaskets are fixedly connected to the bottom of the protective beam, and the tops of the movable plate are fixedly provided with multiple springs, the tops of the multiple springs are respectively fixedly connected to the side wall of the movable groove.

[0009] As a preferred technical solution of this utility model, guide members are fixedly provided at both ends of the support plate, and the two guide members extend to the inside of the side wall of the protective groove at the ends away from the support plate, and the outer surfaces of the two guide members are slidably connected to the inner surface of the protective groove.

[0010] As a preferred technical solution of this utility model, the guide component includes a guide block, one end of which is fixedly connected to one end of the support plate. A guide groove is provided on the side wall of the movable groove, and the end of the guide block away from the support plate extends into the guide groove. The outer surface of the guide block is slidably connected to the inner surface of the guide groove.

[0011] As a preferred technical solution of this utility model, a slider is fixedly provided on one side of the movable plate, and a sliding groove is provided on the side wall of the movable groove. The slider extends into the sliding groove from the side away from the movable plate, and the outer surface of the slider is slidably connected to the inner surface of the sliding groove.

[0012] Compared with the prior art, this utility model provides a forklift mast anti-overrun device, which has the following beneficial effects:

[0013] When the fork is about to slide off the forklift mast, the protective beam intercepts it, preventing it from exceeding its intended travel. Upon collision with the protective beam, the fork drives the support plate upwards via the transmission assembly. This, in turn, drives the movable plate upwards via the connecting column. Simultaneously, the support plate and connecting column compress the damping fluid inside the movable groove, causing a pressure change. The damping fluid then flows through the circular groove of the movable plate to the other side, and then again through the square groove of the support plate to the side of the movable groove furthest from the movable plate. As the damping fluid passes through the circular groove of the movable plate and the square groove of the support plate, friction is generated. This friction reduces the impact of the collision between the fork and the protective beam, minimizing damage to the protective beam. This structure improves the service life of existing anti-overtravel devices to some extent and further slows down the fork's movement speed, thus enhancing the practical effectiveness of the anti-overtravel device. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of the forklift mast anti-overrun device provided by this utility model;

[0015] Figure 2 for Figure 1 The diagram shows the structure of the protective beam.

[0016] Figure 3 for Figure 2 The diagram shows a cross-sectional structure.

[0017] Figure 4 for Figure 3 The diagram shows the structure of the protective mechanism.

[0018] Figure 5 for Figure 4 The diagram shows a partial structure.

[0019] Figure 6 for Figure 3 The diagram shows a partial structural schematic of the protective beam.

[0020] In the diagram: 1. Forklift mast; 2. Steel fork; 3. Protective beam; 4. Movable slot; 5. Support plate; 6. Square slot; 7. Connecting column; 8. Movable plate; 9. Circular slot; 10. Drive column; 11. Annular sealing gasket; 12. Spring; 13. Guide block; 14. Guide slot; 15. Slider; 16. Slide groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-6In this embodiment: a forklift mast anti-overrun device is fixedly installed inside the forklift mast 1. The forklift mast 1 is equipped with a steel fork 2 that can move up and down. The anti-overrun device includes a protective beam 3, which is fixedly installed inside the forklift mast 1. The protective beam 3 has a movable groove 4 inside, and a protective mechanism is installed inside the movable groove 4. The protective mechanism includes a transmission component, which is located at the bottom of the protective beam 3. The bottom of the transmission component is slidably connected to the top of the steel fork 2, and the top of the transmission component extends into the movable groove 4. The transmission component is slidably connected to the movable groove 4. A support plate 5 is fixedly installed at the top of the transmission component. Multiple square grooves 6 are opened at the top of the support plate 5. Two connecting columns 7 are fixedly installed at the top of the support plate 5. Movable plates 8 are installed at the top of the two connecting columns 7. The movable plates 8 are fixedly connected to the top of the two connecting columns 7. Multiple circular grooves 9 are opened at the top of the movable plates 8.

[0023] The transmission assembly includes two transmission columns 10, which are located at the bottom of the protective beam 3. The tops of the two transmission columns 10 extend into the interior of the movable groove 4 and are slidably connected to the movable groove 4. The tops of the two transmission columns 10 are fixedly connected to the bottom of the support plate 5. The bottoms of the two connecting columns 7 are slidably connected to the tops of the steel fork 2. The outer surfaces of the two connecting columns 7 are fitted with annular sealing gaskets 11, and the tops of the two annular sealing gaskets 11 are fixedly connected to the bottom of the protective beam 3. The top of the movable plate 8 is fixedly provided with multiple springs 12, and the tops of the multiple springs 12 are respectively fixedly connected to the side wall of the movable groove 4. The two ends of the support plate 5 are respectively fixedly provided with guide members, and the ends of the two guide members away from the support plate 5 extend into the interior of the side wall of the protective groove. The outer surfaces of the two guide members are slidably connected to the inner surface of the protective groove.

[0024] The guide includes a guide block 13, one end of which is fixedly connected to one end of the support plate 5. A guide groove 14 is provided on the side wall of the movable groove 4. The end of the guide block 13 away from the support plate 5 extends into the interior of the guide groove 14. The outer surface of the guide block 13 is slidably connected to the inner surface of the guide groove 14. A slider 15 is fixedly provided on one side of the movable plate 8. A sliding groove 16 is provided on the side wall of the movable groove 4. The side of the slider 15 away from the movable plate 8 extends into the interior of the sliding groove 16. The outer surface of the slider 15 is slidably connected to the inner surface of the sliding groove 16.

[0025] The guide block 13 limits the support plate 5 through the guide groove 14 to prevent the support plate 5 from shifting at an angle during movement. At the same time, the slider 15 limits the movable plate 8 through the slide groove 16 to prevent the movable plate 8 from shifting at an angle during movement. The annular sealing gasket 11 is used to prevent the damping fluid inside the movable groove 4 from leaking from the gap of the transmission column 10.

[0026] When the steel fork 2, after colliding with the protective beam 3, performs a reset movement, it releases the drive of the transmission column 10 and the drive of the spring 12. Based on the extensibility of the spring 12, the spring 12 drives the movable plate 8 to move downward. At the same time, the movable plate 8 drives the support plate 5 to move downward together through the connecting column 7, so that the support plate 5 drives the transmission column 10 to perform a reset movement.

[0027] The working principle and usage process of this utility model are as follows: When the steel fork 2 is about to slide out of the forklift mast 1, the protective beam 3 intercepts the steel fork 2 to prevent it from exceeding its intended stroke. When the steel fork 2 collides with the protective beam 3, the steel fork 2 drives the support plate 5 to move upward through the transmission column 10, causing the support plate 5 to drive the movable plate 8 to move upward together through the connecting column 7. At the same time, the movable plate 8 drives multiple springs 12 to be in a compressed state. The support plate 5 and the connecting column 7 simultaneously squeeze the damping fluid inside the movable groove 4, causing the pressure of the damping fluid inside the movable groove 4 to change. This causes the damping fluid to flow to the other side through the circular groove 9 of the movable plate 8. At the same time, the damping fluid flows again through the square groove 6 of the support plate 5 to the side of the movable groove 4 away from the movable plate 8. When the damping fluid passes through the circular groove 9 of the movable plate 8 and the square groove 6 of the support plate 5 respectively, friction is generated. The friction generated reduces the impact force of the collision between the steel fork 2 and the protective beam 3, thus reducing the damage to the protective beam 3.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A forklift mast anti-overrun device, the anti-overrun device being fixedly installed inside the forklift mast (1), the forklift mast (1) being provided with vertically movable steel forks (2), characterized in that: The anti-overrun device includes a protective beam (3), which is fixed inside the forklift mast (1). The protective beam (3) has a movable groove (4) inside, and a protective mechanism is installed inside the movable groove (4). The protective mechanism includes a transmission component, which is located at the bottom of the protective beam (3). The bottom of the transmission component is slidably connected to the top of the steel fork (2). The top of the transmission component extends into the interior of the movable groove (4). The transmission component is slidably connected to the movable groove (4). A support plate (5) is fixedly provided at the top of the transmission component. Multiple square grooves (6) are provided at the top of the support plate (5). Two connecting columns (7) are fixedly provided at the top of the support plate (5). Movable plates (8) are provided at the top of the two connecting columns (7). The movable plates (8) are fixedly connected to the tops of the two connecting columns (7). Multiple circular grooves (9) are provided at the top of the movable plates (8).

2. The forklift mast anti-overrun device according to claim 1, characterized in that: The transmission assembly includes two transmission columns (10), which are located at the bottom of the protective beam (3). The tops of the two transmission columns (10) extend into the interior of the movable groove (4). The two transmission columns (10) are slidably connected to the movable groove (4). The tops of the two transmission columns (10) are fixedly connected to the bottom of the support plate (5). The bottoms of the two connecting columns (7) are slidably connected to the top of the steel fork (2).

3. The forklift mast anti-overrun device according to claim 2, characterized in that: The outer surfaces of the two connecting columns (7) are fitted with annular sealing gaskets (11), the tops of the two annular sealing gaskets (11) are fixedly connected to the bottom of the protective beam (3), and the tops of the movable plate (8) are fixedly provided with multiple springs (12), the tops of the multiple springs (12) are respectively fixedly connected to the side wall of the movable groove (4).

4. The forklift mast anti-overrun device according to claim 3, characterized in that: Guide members are fixed at both ends of the support plate (5). The two guide members extend to the inside of the side wall of the protective groove at the ends away from the support plate (5). The outer surfaces of the two guide members are slidably connected to the inner surface of the protective groove.

5. A forklift mast anti-overrun device according to claim 4, characterized in that: The guide includes a guide block (13), one end of which is fixedly connected to one end of the support plate (5). The side wall of the movable groove (4) is provided with a guide groove (14). The end of the guide block (13) away from the support plate (5) extends into the guide groove (14). The outer surface of the guide block (13) is slidably connected to the inner surface of the guide groove (14).

6. A forklift mast anti-overrun device according to claim 5, characterized in that: A slider (15) is fixedly provided on one side of the movable plate (8), and a sliding groove (16) is provided on the side wall of the movable groove (4). The slider (15) extends into the sliding groove (16) from the side away from the movable plate (8), and the outer surface of the slider (15) is slidably connected to the inner surface of the sliding groove (16).

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