Bending telescopic arm device suitable for fork loading of crops

Abstract

The utility model discloses a bending telescopic arm device suitable for fork loading of crops, which comprises a fixed arm, an inner wall, a telescopic oil cylinder, a lifting oil cylinder and a telescopic oil cylinder, the inner wall is arranged in the fixed arm, the telescopic oil cylinder is arranged at the rear end of the fixed arm, the other end of the telescopic oil cylinder is connected with the front end of the inner arm, and the lifting oil cylinder drives the inner arm to extend and retract forwards and backwards. A lifting oil cylinder is arranged at the lower end of the fixed arm, the other end of the lifting oil cylinder is fixed to a vehicle body and controls lifting and descending of the fixed arm, a tipping oil cylinder is arranged at the front end of the inner arm, and the other end of the tipping oil cylinder is connected to a tipping frame and drives the fork arm carrier to turn up and down. The bending telescopic arm device suitable for forking the crops has a large forward extending distance and a large lifting height, the forking space of the crops is effectively increased, the operation efficiency is improved, a driver in a cab can obtain a larger visual field through the bending telescopic device, and the problem of potential safety hazards of operation is solved.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery and equipment technology, specifically to a bending telescopic boom device suitable for forklift loading of agricultural crops. Background Technology

[0002] In existing technologies, telescopic boom lifts are widely used in construction sites, ports, docks, and other operational environments. However, when these telescopic boom lifts are used for farm operations, the following problems often arise: due to the small size of the goods being handled and the high frequency of operation, their operational efficiency is difficult to meet the demands. Furthermore, due to the complex environment of the work site, the driver's field of vision is significantly limited when the goods are raised to a high position, which places higher demands on operational precision and safety.

[0003] Currently, the design characteristics of telescopic boom units make it difficult for operators to directly observe the specific status of goods at height, especially when lifting or stacking them. To address this issue, traditional techniques typically improve driver visibility by increasing the cab's installation height. However, this method faces numerous limitations in practical applications. For example, for equipment requiring operation within containers or low-ceilinged spaces, the overall vehicle height is strictly limited, making adjusting the cab height ineffective. Furthermore, increasing the cab height can reduce vehicle stability, further impacting operational safety. Utility Model Content

[0004] The purpose of this invention is to provide a bending telescopic boom device suitable for forklift loading of agricultural crops, thereby solving the problems existing in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a bending telescopic boom device suitable for forklift loading of agricultural crops, comprising:

[0006] Fixed arm;

[0007] Inner arm, which is disposed inside the fixed arm;

[0008] A telescopic cylinder is provided at the rear end of the fixed arm, and the other end of the telescopic cylinder is connected to the front end of the inner arm to drive the extension and retraction of the inner arm.

[0009] A lifting cylinder is provided at the lower end of the fixed arm, and the other end of the lifting cylinder is fixed to the vehicle body to control the lifting and lowering of the fixed arm.

[0010] A tilting cylinder is provided at the front end of the inner arm, and the other end of the tilting cylinder is connected to the tilting frame to drive the fork carriage to tilt up and down.

[0011] Preferably, the inner arm is fitted inside the fixed arm.

[0012] Preferably, the front end of the inner arm is connected to a tilting frame via a fixed pin, and the front end of the tilting frame is connected to a fork carriage via a fixed pin.

[0013] Preferably, the tilting cylinder is connected in series with a compensating cylinder, and one end of the compensating cylinder is connected to the fixed arm.

[0014] Preferably, the fixed arm and the lifting cylinder are rotatably connected to the boom rotation shaft.

[0015] Preferably, the tilting cylinder and the tilting frame are rotatably connected by a tilting frame rotation shaft.

[0016] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0017] This bending telescopic boom device, suitable for forklifting agricultural products, utilizes an inner boom design combined with the driving function of a telescopic cylinder to achieve a wide range of fork carriage extension and retraction, thereby increasing the coverage of forklift operations. The tilting function of the fork carriage is achieved by a tilting cylinder, enabling rapid loading and unloading of goods and improving operational efficiency. The bending structure at the front of the inner boom, combined with the lifting function of the fixed boom, allows the driver to maintain a good operating view even when the goods are raised to a high position, overcoming the operational safety issues caused by limited visibility in traditional telescopic boom devices. The tilting cylinder and the compensation cylinder are connected in series; the compensation cylinder automatically adjusts the hydraulic flow of the tilting cylinder, ensuring that the fork carriage remains horizontal during lifting or lowering. Effectively preventing cargo tipping and ensuring operational safety, the rotating connection design of the fixed arm, lifting cylinder, and boom rotation shaft allows the arm to rotate and lift flexibly, meeting operational needs in different scenarios, such as forklift operations in confined farm spaces. The tilting frame and tilting cylinder are connected via the tilting frame rotation shaft, providing greater flexibility and adapting to cargo stacking at various angles. This device has a large forward reach and lifting height, allowing not only loading and unloading of goods to higher places but also the ability to access items over obstacles. The bending structure at the front of the inner arm effectively increases the forklift space for crops, improving operational efficiency. The bending telescopic device provides the driver in the cab with a wider field of vision, solving operational safety hazards. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure assembly of this utility model;

[0019] Figure 2 This is a schematic diagram of the area for forking crops according to this utility model.

[0020] In the diagram: 1. Fixed boom; 2. Inner boom; 3. Tilting frame; 4. Fork carriage; 5. Telescopic cylinder; 6. Tilting cylinder; 7. Lifting cylinder; 8. Compensation cylinder; 9. Boom rotation shaft; 10. Tilting frame rotation shaft. 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] like Figure 1 and Figure 2 As shown, a bending telescopic boom device suitable for forklifts used in agricultural products includes a fixed boom 1; an inner boom 2, which is located inside the fixed boom 1; a telescopic cylinder 5, located at the rear end of the fixed boom 1, with the other end of the telescopic cylinder 5 connected to the front end of the inner boom 2, used to drive the extension and retraction of the inner boom 2; a lifting cylinder 7, located at the lower end of the fixed boom 1, with the other end of the lifting cylinder 7 fixed to the vehicle body, used to control the lifting and lowering of the fixed boom 1; and a tilting cylinder 6, located at the front end of the inner boom 2, with the other end of the tilting cylinder 6 connected to a tilting frame 3, used to drive the fork carriage 4 to tilt up and down.

[0023] This device uses a telescopic cylinder 5 to extend and retract the inner boom 2, allowing for flexible adjustment of the loading and unloading range of crops. A lifting cylinder 7 is installed at the lower end of the fixed boom 1 and connected to the vehicle body. Driven by the lifting cylinder 7, the fixed boom 1 can be raised and lowered as a whole to meet the needs of different operating heights. A tilting cylinder 6 is installed at the front end of the inner boom 2, with its other end connected to the tilting frame 3. Pushing the tilting cylinder 6 enables the fork carriage 4 to tilt up and down, further optimizing the adjustment of loading angle and direction. This bending telescopic boom device has a compact structure and multiple functions. Through the cooperation of the telescopic cylinder 5 and the tilting cylinder 6, the boom length and fork tilting angle can be flexibly adjusted. Simultaneously, the lifting cylinder 7 allows the entire device to adapt to different operating heights, improving loading efficiency and ease of operation.

[0024] In the above scheme, the inner arm 2 can be made of high-strength alloy steel, carbon fiber composite material, or other high-strength lightweight materials to enhance the durability of the device and reduce its weight. The connection between the fixed arm 1 and the vehicle body can be achieved by bolting, welding, or quick-release connection to meet the installation requirements of different vehicles.

[0025] In one possible implementation, the inner arm 2 is fitted inside the fixed arm 1. The inner arm 2 and the fixed arm 1 are connected by a fitting, and the inner arm 2 slides along a guide groove within the fixed arm 1, ensuring smooth and reliable extension and retraction of the inner arm 2. This design simplifies the assembly process of the inner arm and the fixed arm, while improving the guiding accuracy of the inner arm 2, effectively reducing friction and wear during device operation, and extending the service life of the device.

[0026] The connection between the inner arm 2 and the fixed arm 1 can be made by using a rolling guide rail, a slider guide mechanism, or other forms of sliding mechanism to further improve the guiding effect and adapt to different working conditions.

[0027] In one possible implementation, the front end of the inner arm 2 is connected to the tilting frame 3 via a fixed pin, and the front end of the tilting frame 3 is connected to the fork carriage 4 via a fixed pin. The inner arm 2 and the tilting frame 3 are connected by pins, forming a rotatable fulcrum. The tilting frame 3 and the fork carriage 4 are also connected by pins. The action of the tilting cylinder 6 is transmitted to the tilting frame 3, driving the fork carriage 4 to tilt, thereby tilting or securing the goods. This design, which connects the tilting frame 3 and the fork carriage 4 via pins, not only simplifies the structure but also improves the stability and reliability of the device, resulting in smoother fork tilting during operation. The pin connection can be replaced with a ball joint or high-strength bolt connection to adapt to different load requirements and working conditions.

[0028] In one possible implementation, the tilting cylinder 6 is connected in series with a compensating cylinder 8, one end of which is connected to the fixed arm 1. The compensating cylinder 8, by being connected in series with the tilting cylinder 6, provides auxiliary hydraulic compensation. When the fork carriage 4 is subjected to different loads, the compensating cylinder 8 can balance the pressure fluctuations in the hydraulic system, ensuring the stability of the tilting action. The inclusion of the compensating cylinder 8 significantly improves the smoothness and control accuracy of the tilting cylinder 6 under heavy loads, extends the cylinder's service life, and enhances operational safety. The compensating cylinder 8 can be replaced with a pneumatic buffer device or a spring buffer mechanism to achieve a similar pressure compensation effect while reducing system complexity.

[0029] In one possible implementation, the fixed arm 1 and the lifting cylinder 7 are rotatably connected by a boom rotation shaft 9. Through the boom rotation shaft 9, the fixed arm 1 and the lifting cylinder 7 form a rotatable connection point. When the lifting cylinder 7 actuates, the boom rotation shaft 9 provides a fulcrum, driving the fixed arm 1 to complete the corresponding lifting or lowering action. The boom rotation shaft 9 improves the rotational flexibility of the fixed arm 1, ensures the smoothness of the lifting action, reduces the shear force borne by the cylinder, and extends its service life. The boom rotation shaft 9 can employ a self-lubricating bearing or a double bearing structure to improve the durability and stability of the rotating components.

[0030] In one possible implementation, the tilting cylinder 6 and the tilting frame 3 are rotatably connected by a tilting frame rotating shaft 10. The tilting cylinder 6 is connected to the tilting frame 3 via the tilting frame rotating shaft 10, and under the drive of the hydraulic system, the tilting frame 3 is flexibly tilted through the action of the rotating shaft. The design of the tilting frame rotating shaft 10 makes the movement of the tilting frame 3 more precise and stable, while reducing the direct force on the tilting cylinder 6, thus improving the stability and durability of the system. The tilting frame rotating shaft 10 can be replaced with a rotating mechanism supported by two-way bearings to further improve its service life and load-bearing capacity.

[0031] Working process: During the lifting of the telescopic boom, the piston rod of the telescopic cylinder 5 extends, pushing the inner arm 2 to slide along the inside of the fixed arm 1, gradually extending forward to achieve the forward movement of the fork carriage 4. When it is necessary to retract the telescopic boom, the piston rod of the telescopic cylinder 5 retracts, causing the inner arm 2 to retract relative to the fixed arm 1, completing the backward movement of the fork carriage 4. The telescopic cylinder 5, through precise hydraulic control, ensures smooth movement of the inner arm 2, avoiding vibration or damage caused by inertia.

[0032] When the angle of the fork carriage 4 needs to be adjusted, the tilting cylinder 6 activates. When its piston rod extends, it pushes the tilting frame rotating shaft 10 to rotate, causing the fork carriage 4 to tilt upwards to adapt to stacking or loading / unloading needs. When the piston rod of the tilting cylinder 6 retracts, it pulls the tilting frame rotating shaft 10 to rotate in the opposite direction, causing the fork carriage 4 to tilt downwards, returning to a horizontal position or other specified angle. The extension and retraction of the tilting cylinder 6 is precisely controlled by the hydraulic system, enabling diverse and flexible adjustment of the fork carriage 4 angle.

[0033] The lifting cylinder 7 controls the raising and lowering of the fixed arm 1. When the piston rod of the lifting cylinder 7 extends, the fixed arm 1 rises upward around the boom rotation shaft 9, thus raising the entire arm to meet different working height requirements. When the piston rod of the lifting cylinder 7 retracts, the fixed arm 1 falls downward around the large pin at its connection with the vehicle body, completing the lowering action of the arm. Throughout the entire lifting and lowering process, the cooperation between the cylinder and the rotation shaft ensures the stability of the device and operational safety.

[0034] The tilting cylinder 6 and the compensating cylinder 8 are interconnected via staggered cavities, forming a dynamic compensation system. When the boom is raised or lowered, the piston rod of the compensating cylinder 8 extends or retracts accordingly, guiding the hydraulic fluid within its cylinder to the corresponding cavity of the tilting cylinder 6. This design causes the piston rod of the tilting cylinder 6 to reverse its movement, thereby driving the tilting frame 3 and the fork carriage 4 to rotate in the opposite direction, compensating for angle changes caused by boom rotation. Through this compensation mechanism, the fork carriage 4 remains horizontal during boom raising and lowering, greatly improving operational accuracy and safety, and preventing accidents caused by cargo tilting.

[0035] Throughout the entire operation, the movements of each cylinder are precisely coordinated through the unified control of the hydraulic system. The telescopic cylinder 5, lifting cylinder 7, tilting cylinder 6, and compensation cylinder 8 work together to ensure that the telescopic movement of the inner boom 2, the lifting and lowering of the fixed boom 1, and the tilting of the fork carriage 4 can all maintain balance during dynamic changes, adapting to complex operational requirements.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bending telescopic boom device suitable for forklift loading of agricultural crops, characterized in that, include: Fixed arm (1); Inner arm (2), the inner arm (2) is disposed inside the fixed arm (1); Telescopic cylinder (5): The telescopic cylinder (5) is provided at the rear end of the fixed arm (1). The other end of the telescopic cylinder (5) is connected to the front end of the inner arm (2) to drive the inner arm (2) to extend and retract. Lifting cylinder (7): The lower end of the fixed arm (1) is provided with a lifting cylinder (7), and the other end of the lifting cylinder (7) is fixed to the vehicle body to control the lifting and lowering of the fixed arm (1); Tilting cylinder (6): The inner arm (2) is provided with a tilting cylinder (6) at the front end. The other end of the tilting cylinder (6) is connected to the tilting frame (3) to drive the fork carriage (4) to tilt up and down.

2. A bending telescopic boom device for forklifting agricultural crops according to claim 1, characterized in that: The inner arm (2) is fitted inside the fixed arm (1).

3. A bending telescopic boom device for forklifting agricultural crops according to claim 1, characterized in that: The front end of the inner arm (2) is connected to the tilting frame (3) via a fixed pin, and the front end of the tilting frame (3) is connected to the fork carriage (4) via a fixed pin.

4. A bending telescopic boom device for forklifting agricultural crops according to claim 1, characterized in that: The tilting cylinder (6) is connected in series with a compensation cylinder (8), one end of which is connected to the fixed arm (1).

5. A bending telescopic boom device for forklifting agricultural crops according to claim 1, characterized in that: The fixed arm (1) and the lifting cylinder (7) are rotatably connected to the boom rotating shaft (9).

6. A bending telescopic boom device for forklifting agricultural crops according to claim 1, characterized in that: The tilting cylinder (6) and the tilting frame (3) are rotatably connected by the tilting frame rotating shaft (10).

Images