Product Description
The Hydraulic Four Bar Linkage Balance Crane is a heavy-duty lifting equipment that utilizes hydraulic drive and a four-link balancing mechanism. Primarily used in ports, shipyards, and large cargo yards requiring efficient loading/unloading operations, its core feature lies in harnessing hydraulic power to achieve smooth cargo movement during boom adjustment through the four-link mechanism. This design minimizes energy loss while significantly enhancing operational efficiency.
1. Basic Composition
The hydraulic balanced four-link gantry crane is mainly composed of the following parts:
(1) Portal Frame (Gantry Structure)
High-strength steel structure is adopted to support the weight of the entire machine and provide stability.
The bottom is equipped with a traveling mechanism (tire or track) to move within the working area.
The portal frame design allows vehicles or equipment to pass underneath, improving space utilization.
(2) Four-Link Balance Mechanism
It consists of four key components:
Boom (Lifting Arm): The main load-bearing structure, determining the crane's working radius.
Elephant Nose Beam: Connects the boom and the hook to optimize the movement trajectory of the cargo.
Large Pull Rod & Small Pull Rod: Through the linkage of hinge points, a geometric balance is formed to keep the cargo moving horizontally during adjustments.
Function: Reduces energy loss during amplitude changes, improves stability, and prevents excessive shaking of the cargo.
(3) Hydraulic Drive System
Hydraulic Cylinder: Drives amplitude, lifting, and other actions.
Hydraulic Motor: Used for rotation and traveling (if equipped).
Hydraulic Pump Station: Provides high-pressure oil to control the actuators.
Control Valve Group: Adjusts flow and direction to achieve precise control.
(4) Rotary Mechanism
Uses a rotary support driven by a hydraulic motor or electric motor, enabling 360° rotation of the upper structure.
(5) Lifting Mechanism
The hydraulic motor drives the winch, working in conjunction with the wire rope and hook to lift cargo.
2. Working Principle
(1) Amplitude Action
The hydraulic cylinder pushes the four-link mechanism to change the boom angle.
Due to the geometric balance design of the four linkages, the height change of the cargo during amplitude adjustment is minimal and stable.
(2) Lifting and Rotation
Lifting: The hydraulic motor drives the drum to wind and release the wire rope, enabling cargo lifting.
Rotation: The hydraulic motor drives the rotary support, allowing the crane's upper structure to rotate horizontally.
(3) Traveling (if equipped)
The hydraulic motor or electric motor drives the tires/tracks to expand the operational range.
3. Main Features
Efficient and Stable Four-Link Mechanism: Ensures smooth amplitude adjustment, and the hydraulic system enables precise speed regulation, making it suitable for precision lifting.
Strong Load Capacity: The lifting capacity typically ranges from dozens to hundreds of tons, making it ideal for heavy cargo (e.g., containers, steel).
Flexible Adaptation: The portal frame design is suitable for narrow spaces, and the rotation + traveling function expands coverage.
Energy Saving and Environmental Protection: The hydraulic system can recover part of the kinetic energy, and its noise level is lower than that of purely electric cranes.
4. Typical Applications
- Ports: Container and bulk cargo handling.
- Shipyards: Lifting large hull sections.
- Rail Freight Yards: Heavy cargo handling.
- Large Construction Sites: Steel structure and prefabricated component installation.
5.Design Specifications
The hydraulic crane is designed and manufactured according to:
GB3811-2008 Crane Design Code
GB6067-85 Safety Code for Lifting Machinery
|
model |
safety load (KN) |
Maximum working radius (m) |
Speed of acceleration (m/min) |
Rotational speed (r/min) |
Amplitude change time (s) |
lifting altitude (m) |
Rotation Angle (°) |
Allowable inclination (longitudinal/ transverse)(°) |
power (KW) |
|
YQ1 |
10 |
6-2 |
15 |
1 |
60 |
30 |
360° |
2°/5° |
7.5 |
|
YQ1.5 |
15 |
8-22 |
15 |
1 |
60 |
30 |
360° |
2°/5° |
11 |
|
YQ2 |
20 |
5-24 |
15 |
1 |
60 |
30 |
360° |
2°/5° |
15 |
|
YQ3 |
30 |
8-25 |
15 |
0.9 |
70 |
30 |
360° |
2°/5° |
22 |
|
YQ5 |
50 |
12-25 |
15 |
0.75 |
80 |
30 |
360° |
2°/5° |
37 |
|
YQ8 |
80 |
12-25 |
15 |
0.75 |
100 |
40 |
360° |
2°/5° |
55 |
|
YQ10 |
100 |
12-25 |
15 |
0.75 |
110 |
40 |
360° |
2°/5° |
75 |
|
YQ15 |
150 |
12-28 |
15 |
0.6 |
110 |
30 |
360° |
2°/5° |
90 |
|
YQ20 |
200 |
16-30 |
15 |
0.6 |
120 |
35 |
270° |
2°/5° |
75*2 |
|
YQ25 |
250 |
20-35 |
15 |
0.5 |
130 |
40 |
270° |
2°/5° |
90*2 |
|
YQ30 |
300 |
35 |
15 |
0.4 |
140 |
40 |
270° |
2°/5° |
90*2 |
|
YQ35 |
350 |
20-40 |
15 |
0.5 |
150 |
45 |
360° |
2°/5° |
110*2 |
|
YQ45 |
400 |
20-40 |
15 |
0.5 |
150 |
45 |
360° |
2°/5° |
140*2 |
|
YQ45 |
450 |
25-40 |
15 |
0.45 |
160 |
50 |
360° |
2°/5° |
140*2 |
|
YQ50 |
500 |
20-40 |
15 |
0.45 |
170 |
50 |
360° |
2°/5° |
165*2 |
6. Maintenance Points
- Hydraulic System: Regularly check oil cleanliness and seals to prevent leaks.
- Four-Link Mechanism: Lubricate joints to reduce wear.
- Steel Structure: Inspect welds and bolt connections to prevent fatigue cracks.
Summary
The hydraulic four-bar balance crane achieves "force self-balancing" through a parallel four-bar linkage mechanism. It features high-power custom motors and a modular winding system, delivering high efficiency (1400 tons/hour), adaptability (for environments ranging from -30°C to 50°C), and energy savings in bulk cargo handling. The design addresses traditional crane challenges like lifting force, maintenance costs, and environmental constraints, offering a revolutionary solution for heavy material handling in ports, steel mills, and mines.
Hot Tags: Hydraulic Four Bar Linkage Balance Crane, China Hydraulic Four Bar Linkage Balance Crane manufacturers, suppliers, factory, crane, hydraulic grab, Four Link Portal Crane, special grab, Fixed Funnel, Hybrid Rubber Tyre Crane