A type of electric front-end lifting device hydraulic boom

Abstract

This utility model discloses an electric reach stacker hydraulic boom, including a vehicle body. A lifting mechanism for lifting containers is mounted on the upper end of the vehicle body. The lifting mechanism includes a boom, a container clamping device, a movable arm, a first hydraulic cylinder, a second hydraulic cylinder, and a first counterweight. The boom is movably mounted on the upper end of the vehicle body via a pivot. The container clamping device is located at one end of the boom. A movable arm is movably mounted on one side of the inner side of the boom. The first hydraulic cylinder is movably mounted on the upper end of the vehicle body via a pin. The movable end of the first hydraulic cylinder is movably connected to the boom via the pin. The second hydraulic cylinder is fixedly mounted on one side of the upper end of the boom. The advantage of this utility model is that it adds a dynamic counterweight adjustment structure to the hydraulic boom, allowing for real-time adjustment of the front and rear weight of the hydraulic boom. This enables the device to lift containers of different weights in the most labor-saving manner.

Description

Technical Field

[0001] This utility model relates to the technical field of container front cranes, specifically to an electric front crane hydraulic boom. Background Technology

[0002] Container front-end cranes, as mobile lifting equipment designed specifically for loading, unloading, stacking, and handling international standard containers, play a vital role in ports, docks, railway stations, and logistics centers, and are widely used.

[0003] However, under current technological conditions, this type of container front crane has a significant problem in practical use. Since the weight of the containers handled by each vehicle is not fixed, and existing container front crane spreader hydraulic booms lack a dynamic counterweight structure, they cannot dynamically adjust the weight at both ends of the boom according to actual needs. Consequently, they cannot effectively reduce the resistance torque faced by the boom during each lifting or lowering process. To solve this problem, it is necessary to make targeted improvements and optimizations to the spreader hydraulic boom of electric front cranes. Utility Model Content

[0004] The purpose of this utility model is to provide an electric front-end lifting device with a hydraulic boom to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an electric front-end crane hydraulic boom, comprising a vehicle body, a lifting mechanism for lifting containers being provided at the upper end of the vehicle body, the lifting mechanism comprising a boom, a container clamping device, a movable arm, a first hydraulic cylinder, a second hydraulic cylinder, and a first counterweight. The boom is movably mounted on the upper end of the vehicle body via a pivot, a container clamping device is provided at one end of the boom, a movable arm is movably mounted on one side inside the boom, a first hydraulic cylinder is movably mounted on the upper end of the vehicle body via a pin, the movable end of the first hydraulic cylinder is movably connected to the boom via the pin, a second hydraulic cylinder is fixedly mounted on one side of the upper end of the boom, and a first counterweight is fixedly mounted at one end of the movable arm.

[0006] Preferably, a second counterweight is provided on one side of the first counterweight, and a fixing mechanism is provided between the first and second counterweights. The fixing mechanism includes a slot, a plug, a limiting groove, and a limiting pin. The second counterweight has a slot on its surface, and the first counterweight has a plug fixedly provided on its surface. The plug has a limiting groove on its surface, and a limiting pin is movably inserted into the upper end of the slot. The fixing mechanism can engage and fix the first and second counterweights together. In this way, when dealing with overweight containers, the second counterweight can be installed as needed to ensure the weight balance at both ends of the boom.

[0007] Preferably, a limiting ring is fixedly provided on the outer surface of the limiting pin, and a spring is sleeved on the surface of the limiting pin between the limiting ring and the second counterweight. The upper end of the spring is fixedly connected to the limiting ring, and the lower end of the spring is fixedly connected to the second counterweight. The spring can automatically contract to drive the limiting pin to move down and reset.

[0008] Preferably, the upper outer surface of the limiting pin has a lifting hole, which allows for easy connection to the hook of a crane. During lifting, the limiting pin moves upward, stretching the spring and causing it to move out of the slot. The crane then aligns the slot of the second counterweight with the insert of the first counterweight and lowers the hook. Under the influence of gravity and the spring, the limiting pin automatically resets, inserting itself into the limiting groove. This secures the first and second counterweights. Similarly, when the second counterweight needs to be removed, the hook and lifting hole are connected, and the crane lifts the limiting pin upward, pulling it out of the limiting groove. The second counterweight is then removed from the surface of the first counterweight by horizontal lifting.

[0009] Preferably, the vehicle body surface is provided with support legs on both sides, which can be deployed when needed to provide better support for the device.

[0010] Preferably, the movable end of the second hydraulic cylinder is fixedly connected to the movable arm. The retraction of the second hydraulic cylinder can push the movable arm to move, thereby dynamically adjusting the position of the first counterweight block from the boom pivot, so as to balance the lifting of containers of different weights. In this way, the device can lift containers of different weights in the most labor-saving manner.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model can move the movable arm by retracting the second hydraulic cylinder, thereby dynamically adjusting the position of the first counterweight block from the boom pivot, so as to balance the lifting of containers of different weights. In this way, this device can lift containers of different weights in the most labor-saving way.

[0012] 2. When facing the lifting of overweight containers, this device can also be extended with a second counterweight, thus making the device highly adaptable to various lifting conditions. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the hydraulic boom of an electric front-end lifting device according to this utility model; Figure 2 This is a side view of a hydraulic boom for an electric front-end lifting device according to the present invention; Figure 3 This is an overall structural view of the first and second counterweight blocks in the hydraulic boom of an electric front-end lifting device according to this utility model; Figure 4 This utility model relates to an electric front-end lifting device with a hydraulic boom. Figure 1 A magnified view of point A in the middle.

[0014] In the diagram: 1. Vehicle body; 2. Boom; 3. Container clamping device; 4. Movable boom; 5. First hydraulic cylinder; 6. Second hydraulic cylinder; 7. First counterweight; 8. Second counterweight; 9. Slot; 10. Insert block; 11. Limiting slot; 12. Limiting pin; 13. Limiting ring; 14. Spring; 15. Lifting hole; 16. Support structure. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1-4 This utility model provides a technical solution: an electric front-end lifting device hydraulic boom, including a vehicle body 1, with a lifting mechanism for lifting containers installed at the upper end of the vehicle body 1.

[0017] The lifting mechanism includes a boom 2, a container clamping device 3, a movable boom 4, a first hydraulic cylinder 5, a second hydraulic cylinder 6, and a first counterweight 7. The boom 2 is movably mounted on the upper end of the vehicle body 1 via a pivot, allowing the boom 2 to rotate around the pivot to lift and lower containers. A container clamping device 3 is installed at one end of the boom 2 to securely hold the container, ensuring safety during the lifting process.

[0018] A movable boom 4 is movably mounted on one side of the boom 2, providing a structural basis for subsequent counterweight adjustments. A first hydraulic cylinder 5 is movably mounted on the upper end of the vehicle body 1 via a pin. The movable end of the first hydraulic cylinder 5 is movably connected to the boom 2 via the pin. The extension and retraction of the first hydraulic cylinder 5 can drive the boom 2 to perform lifting and lowering movements, thereby realizing the lifting and placement of containers.

[0019] A second hydraulic cylinder 6 is fixedly installed on one side of the upper end of the boom 2, and the movable end of the second hydraulic cylinder 6 is fixedly connected to the movable arm 4. By retracting the second hydraulic cylinder 6, the movable arm 4 can be moved, thereby dynamically adjusting the position of the first counterweight 7 from the pivot of the boom 2. This balances the lifting of containers of different weights, allowing the device to lift containers of different weights in the most labor-saving manner.

[0020] A second counterweight 8 is provided on one side of the first counterweight 7, and a fixing mechanism is provided between the first counterweight 7 and the second counterweight 8. The fixing mechanism includes a slot 9, an insert 10, a limiting groove 11, and a limiting pin 12. The slot 9 is opened on the surface of the second counterweight 8, and the insert 10 is fixedly installed on the surface of the first counterweight 7. The insert 10 has a limiting groove 11 on its surface, and the limiting pin 12 is movably inserted into the upper end of the slot 9. Through this fixing mechanism, the first counterweight 7 and the second counterweight 8 can be engaged and fixed together. In this way, when dealing with overweight containers, the second counterweight 8 can be easily installed according to actual needs to ensure the weight balance at both ends of the boom 2, thereby improving the lifting capacity and stability of the equipment.

[0021] A limiting ring 13 is fixedly installed on the outer surface of the limiting pin 12. A spring 14 is sleeved on the surface of the limiting pin 12 between the limiting ring 13 and the second counterweight 8. The upper end of the spring 14 is fixedly connected to the limiting ring 13, and the lower end of the spring 14 is fixedly connected to the second counterweight 8. Through the elastic action of the spring 14, it can automatically contract to drive the limiting pin 12 to move down and reset, ensuring that the first counterweight 7 and the second counterweight 8 are firmly fixed.

[0022] The upper outer surface of the limiting pin 12 has a lifting hole 15. The lifting hole 15 allows for easy connection to the hook of a crane, enabling lifting operations. During lifting, the crane's pulling force causes the limiting pin 12 to move upwards, stretching the spring 14 and causing it to move out of the slot 9. The crane then aligns the slot 9 of the second counterweight 8 with the insert 10 of the first counterweight 7 and engages it. Next, the crane lowers the hook, at which point the limiting pin 12 automatically resets under the combined action of gravity and the spring 14, inserting itself into the limiting groove 11. This completes the fixation of the first counterweight 7 and the second counterweight 8. When the second counterweight 8 needs to be disassembled, it is similarly connected via the hook and lifting hole 15. Then, the crane lifts the limiting pin 12 upwards, causing it to be pulled out of the limiting groove 11. Subsequently, it is moved horizontally and lifted to remove the second counterweight 8 from the surface of the first counterweight 7. This design makes the installation and disassembly of the second counterweight 8 simpler and faster, greatly improving work efficiency.

[0023] The vehicle body 1 has support legs 16 on both sides of its surface. The support legs 16 can be deployed when needed to provide better support for the device, enhance the stability of the equipment during lifting operations, prevent the equipment from tipping over, and ensure operational safety.

[0024] Working principle: When using this device, the extension and retraction of the first hydraulic cylinder 5 controls the pitch of the boom 2. Then, the container clamping device 3 clamps the container for lifting. This is the lifting principle of the existing electric reach stacker. At the same time, the retraction of the second hydraulic cylinder 6 can push the movable boom 4 to move, thereby dynamically adjusting the position of the first counterweight 7 from the pivot of the boom 2. This balances the lifting of containers of different weights, so that the device can lift containers of different weights in the most labor-saving way. Simultaneously, when handling overweight containers, this device can also extend the second counterweight 8. During extension, it connects to the crane hook and lifting hole 15, and then the crane lifts the container. During lifting, the limit pin 12 moves upward, stretching the spring 14 until its elasticity is balanced with the weight of the second counterweight 8. At this point, the limit pin 12 moves out of the slot 9. The crane then aligns the slot 9 of the second counterweight 8 with the insert block 10 of the first counterweight 7 and engages it. Finally, the crane lowers the hook. Under the action of gravity and spring 14, the positioning pin 12 will automatically reset, so that the limiting pin 12 is inserted into the limiting groove 11, thus completing the fixation of the first counterweight 7 and the second counterweight 8. When it is necessary to disassemble the second counterweight 8, the same method is used to connect the hook and lifting hole 15, and then the crane lifts the limiting pin 12 upward, so that the limiting pin 12 is pulled out of the limiting groove 11. Then, it is moved horizontally and lifted to remove the second counterweight 8 from the surface of the first counterweight 7. In this way, the device has strong expansion performance and can be further adapted to various lifting conditions.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] 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 hydraulic boom for an electric front-end lifting device, comprising a vehicle body (1), characterized in that: The upper end of the vehicle body (1) is provided with a lifting mechanism for lifting containers. The lifting mechanism includes a boom (2), a container clamping device (3), a movable arm (4), a first hydraulic cylinder (5), a second hydraulic cylinder (6), and a first counterweight (7). The upper end of the vehicle body (1) is movably provided with a boom (2) via a pivot. One end of the boom (2) is provided with a container clamping device (3). The movable arm (4) is movably provided on one side inside the boom (2). The upper end of the vehicle body (1) is movably provided with a first hydraulic cylinder (5) via a pin. The movable end of the first hydraulic cylinder (5) is movably connected to the boom (2) via a pin. The upper end of the boom (2) is fixedly provided with a second hydraulic cylinder (6). One end of the movable arm (4) is fixedly provided with a first counterweight (7).

2. The hydraulic boom of an electric front-end lifting device according to claim 1, characterized in that: A second counterweight (8) is provided on one side of the first counterweight (7). A fixing mechanism is provided between the first counterweight (7) and the second counterweight (8). The fixing mechanism includes a slot (9), a plug (10), a limiting groove (11), and a limiting pin (12). A slot (9) is provided on the surface of the second counterweight (8). A plug (10) is fixedly provided on the surface of the first counterweight (7). A limiting groove (11) is provided on the surface of the plug (10). A limiting pin (12) is movably inserted into the upper end of the slot (9).

3. The hydraulic boom of an electric front-end lifting device according to claim 2, characterized in that: A limiting ring (13) is fixedly provided on the outer surface of the limiting pin (12). A spring (14) is sleeved on the surface of the limiting pin (12) between the limiting ring (13) and the second counterweight (8). The upper end of the spring (14) is fixedly connected to the limiting ring (13), and the lower end of the spring (14) is fixedly connected to the second counterweight (8).

4. The hydraulic boom of an electric front-end lifting device according to claim 2, characterized in that: The upper outer surface of the limiting pin (12) is provided with a lifting hole (15).

5. The hydraulic boom of an electric front-end lifting device according to claim 1, characterized in that: The vehicle body (1) has support legs (16) on both sides of its surface.

6. The hydraulic boom of an electric front-end lifting device according to claim 1, characterized in that: The movable end of the second hydraulic cylinder (6) is fixedly connected to the movable arm (4).

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