Manual control device for adjusting angle of pallet fork of electric industrial vehicle

Abstract

The utility model relates to the technical field of electric forklifts, in particular to a manual control device for adjusting the angle of a fork of an electric industrial vehicle, which is characterized in that the upper part of a fixed plate is rotationally connected with the upper part of the rear end of the fork through a fork rotating shaft; the top of the fixing plate is connected with the top end of a jack valve element in the jack through a connecting frame, the lower end of a jack sleeve in the jack is installed on the movable base, the movable base is rotationally installed in the rear end of the warping plate through a base rotating shaft, and the front end of the warping plate is rotationally installed on a shaft hole frame at the bottom of the fixing plate through a warping plate rotating shaft. The front end of the warping plate movably abuts against a back plate of the pallet fork. The fork is pushed to rotate through the lever principle, angle adjustment is achieved, the structure is simple, external energy is not needed, manufacturing and maintenance cost is reduced, meanwhile, operation is convenient and fast, the angle of the fork can be accurately adjusted, springback of the fork is avoided, safety and stability are improved, and the fork is suitable for various working environments.

Description

Technical Field

[0001] This utility model relates to the field of electric forklift technology, specifically to a manual control device for adjusting the fork angle of an electric industrial vehicle. Background Technology

[0002] When electric forklifts are handling, loading, unloading, and stacking goods, the fork angle adjustment is a key function of forklift operation, which directly affects the stability of the goods and the efficiency of loading and unloading.

[0003] Currently, fork angle adjustment mainly relies on hydraulic systems or electric drive mechanisms. Hydraulic drive adjustment is suitable for heavy-duty scenarios, providing a large adjustment force, but it requires additional hydraulic pumps, cylinders, and pipelines, making the overall vehicle structure complex and increasing manufacturing and maintenance costs. Furthermore, hydraulic oil leaks can affect equipment reliability and potentially cause environmental pollution. Electric drive adjustment is suitable for applications requiring high adjustment precision, but motor or pushrod drives may have response delays, limiting adjustment efficiency under high loads, and it relies on external power, potentially resulting in insufficient power in low-temperature or high-load environments. Mechanical lever adjustment is suitable for small forklifts or scenarios with lower power requirements, but it is cumbersome to operate, labor-intensive, difficult to perform precise adjustments, and unsuitable for high-frequency use.

[0004] Existing technical solutions still suffer from insufficient safety and stability in practical applications. For example, during adjustment, the forks may rebound or fail to stop precisely, affecting operational safety. When operating on ramps or stacking at high levels, the fork angle adjustment is not flexible enough, affecting the safe storage and handling of goods. The main reasons for these problems are: hydraulic systems rely on high-pressure fluids, resulting in high manufacturing and maintenance costs, and potential leakage risks with long-term use; electric control systems are limited by motor response speed and load capacity, restricting their application in high-load or unpowered environments; mechanical lever adjustment relies entirely on manual operation, lacking auxiliary power, leading to low adjustment efficiency and poor accuracy; and the lack of efficient human-machine interaction methods makes operation inconvenient and difficult to meet the diverse needs of modern forklifts. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a manual control device for adjusting the fork angle of electric industrial vehicles. This device uses a lever principle to drive the forks to rotate, thereby achieving angle adjustment. It has a simple structure, requires no external energy, reduces manufacturing and maintenance costs, and is easy to operate. It can precisely adjust the fork angle, prevent fork rebound, improve safety and stability, and is suitable for various operating environments.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: it includes a movable base, a jack, a rocker arm, and a fixed plate; the upper part of the fixed plate is rotatably connected to the upper rear end of the fork via a fork rotation shaft; the top of the fixed plate is connected to the top of the jack valve core in the jack via a connecting frame; the lower end of the jack sleeve in the jack is mounted on the movable base; the movable base is rotatably mounted inside the rear end of the rocker arm via a base rotation shaft; the front end of the rocker arm is rotatably mounted on the shaft hole frame at the bottom of the fixed plate via a rocker arm rotation shaft; and the front end of the rocker arm is movably in contact with the back plate of the fork.

[0007] Furthermore, several connecting plates are integrally formed on the upper front side of the fixed plate, and connecting sleeves are fixed on both sides of the upper rear end of the fork. The fork rotation shaft is set through the connecting plates and connecting sleeves.

[0008] Furthermore, the bottom of the movable base has a triangular structure, with one apex of the triangle being rotatably connected to the rocker by a base rotation shaft, and one end of the base rotation shaft is located on the outer side of the rocker, where a hand-tightening nut is installed.

[0009] Furthermore, one end of the rocker's rotating shaft is located on the outer side of the rocker and is fitted with a nut.

[0010] Furthermore, both ends of the fork rotation shaft are located on the outer side of the fork and are equipped with limit nuts.

[0011] Furthermore, the lower end of the jack sleeve is connected and fixed to the top plate of the movable base using screws.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This utility model provides a manual control device for adjusting the fork angle of an electric industrial vehicle. It uses a jack and pushes the fork to rotate through the lever principle to achieve angle adjustment. It has a simple structure, requires no external energy, reduces manufacturing and maintenance costs, and is easy to operate. It can accurately adjust the fork angle, prevent fork rebound, improve safety and stability, and is suitable for various working environments. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is an exploded view of this utility model.

[0015] Explanation of reference numerals in the attached figures:

[0016] 1. Movable base; 2. Jack valve core; 3. Jack sleeve; 4. Rocker arm; 5. Base rotating shaft; 6. Fixing plate; 6-1. Connecting plate; 6-2. Shaft hole bracket; 7. Fork; 7-1. Connecting sleeve; 8. Fork rotating shaft; 9. Hand-tightening nut; 10. Jack operating lever; 11. Limit nut; 12. Nut; 13. Screw; 14. Rocker rotating shaft. Detailed Implementation

[0017] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. The preferred embodiments described are only examples. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] like Figures 1-2 As shown, this specific embodiment adopts the following technical solution: It includes a movable base 1, a jack, a rocker arm 4, and a fixing plate 6; the back of the fixing plate 6 is mounted on the forklift body, and three connecting plates 6-1 are integrally formed on the upper front side of the fixing plate 6. Connecting sleeves 7-1 are fixed on both sides of the upper rear end of the fork 7. The fork rotation shaft 8 is set through the connecting plate 6-1 and the connecting sleeve 7-1. The two ends of the fork rotation shaft 8 are located on the outer side of the fork 7, and limit nuts 11 are installed on both ends, allowing the fork 7 to rotate around the fork rotation shaft 8; the top of the fixing plate 6 is connected to the top of the jack valve core 2 in the jack via a connecting bracket, and the lower end of the jack sleeve 3 in the jack... The movable base 1 is fixedly mounted on the top plate of the movable base 1 using multiple screws 13. The bottom of the movable base 1 has a triangular structure. One apex of the triangle is rotatably connected to the rear end of the rocker 4 via a base rotation shaft 5. One end of the base rotation shaft 5 is located outside the rocker 4 and is fitted with a hand-tightening nut 9. The movable base 1 can rotate around the base rotation shaft 5. The front end of the rocker 4 is rotatably mounted on the shaft hole bracket 6-2 at the bottom of the fixed plate 6 via a rocker rotation shaft 14. One end of the rocker rotation shaft 14 is located outside the rocker 4 and is fitted with a nut 12. The front end of the rocker 4 can rotate around the rocker rotation shaft 14. The front end of the rocker 4 is movably in contact with the back plate of the fork 7.

[0019] In operation, pressing down the jack operating lever 10 drives the jack valve core 2 to move upward. Since the position of the fixed plate 6 is fixed, the jack valve core 2 drives the jack sleeve 3 to move downward. The jack sleeve 3 drives the movable base 1 to rotate around the base rotation axis 5 and move downward, thereby pressing down the rear end of the rocker 4 and lifting the front end of the rocker 4, thereby lifting the fork 7 and realizing the tilt angle adjustment of the fork 7.

[0020] Compared with the prior art, the beneficial effects of this utility model are: This utility model provides a manual control device for adjusting the fork angle of an electric industrial vehicle. It uses a jack and pushes the fork to rotate through the lever principle to achieve angle adjustment. It has a simple structure, requires no external energy, reduces manufacturing and maintenance costs, and is easy to operate. It can accurately adjust the fork angle, prevent fork rebound, improve safety and stability, and is suitable for various working environments.

[0021] For those skilled in the art, modifications can be made to the technical solutions described in the foregoing embodiments, and equivalent substitutions can be made to 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 manual control device for electric industrial vehicle fork angle adjustment, characterized by: It includes a movable base (1), a jack, a rocker arm (4) and a fixed plate (6); the upper part of the fixed plate (6) is rotatably connected to the upper rear end of the fork (7) via a fork rotation shaft (8); the top of the fixed plate (6) is connected to the top of the jack valve core (2) in the jack via a connecting frame; the lower end of the jack sleeve (3) in the jack is installed on the movable base (1); the movable base (1) is rotatably installed in the rear end of the rocker arm (4) via a base rotation shaft (5); the front end of the rocker arm (4) is rotatably installed on the shaft hole frame (6-2) at the bottom of the fixed plate (6) via a rocker rotation shaft (14); and the front end of the rocker arm (4) is rotatably abutted against the back plate of the fork (7).

2. A manual control device for electric industrial vehicle fork angle adjustment as defined in claim 1, wherein: The upper front side of the fixed plate (6) is integrally formed with several connecting plates (6-1), and the upper sides of the rear end of the fork (7) are fixed with connecting sleeves (7-1). The fork rotation shaft (8) is set through the connecting plate (6-1) and the connecting sleeve (7-1).

3. A manual control device for electric industrial vehicle fork angle adjustment as defined in claim 1, wherein: The bottom of the movable base (1) is a triangular structure. One of the apex corners of the triangle is rotatably connected to the rocker (4) by the base rotation shaft (5). One end of the base rotation shaft (5) is located outside the rocker (4) and is fitted with a hand-tightening nut (9).

4. The manual control device for adjusting the fork angle of an electric industrial vehicle according to claim 1, characterized in that: One end of the rocker rotation shaft (14) is located outside the rocker (4) and is fitted with a nut (12).

5. A manual control device for electric industrial vehicle fork angle adjustment as defined in claim 1, wherein: Both ends of the fork rotation shaft (8) are located on the outside of the fork (7) and are equipped with limit nuts (11).

6. A manual control device for electric industrial vehicle fork angle adjustment as defined in claim 1, wherein: The lower end of the jack sleeve (3) is connected and fixed to the top plate of the movable base (1) by screws (13).

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