1、 Main types and characteristics
|* * Classification criteria * * | * * Type * * | * * Characteristics and application scenarios * *|
|--------------------|-------------------------|----------------------------------------------------------------------------------|
|* * Mode of action * * | * * Single action * * | Hydraulic extension, gravity retraction; Low cost, suitable for light load scenarios such as dump trucks. |
|| * * Double acting * * | Hydraulic control for extension and contraction, integrated with bidirectional lock; Suitable for heavy-duty equipment such as cranes and bridge inspection vehicles. |
|* * Structural form * * | * * Piston type * * | Common single rod double acting design, adjustable thrust speed, suitable for most construction machinery. |
|| * * Telescopic Sleeve Type * * | Multi level nesting, short retraction length, long extension stroke (up to 600mm), suitable for space constrained scenarios. |
|* * Installation method * * | * * Fixed * * | Installed through pin holes or feet, with a simple structure. |
|| * * rotatable * * | patented design; Supporting arm with rotating connecting components to adapt to uneven ground; Used for shelters and mining equipment. |
2、 Technological Innovation and Patent Design
1. Rotating legs
-The end of the support arm is equipped with a connecting piece and a fixed piece for rotating connection. The position is locked by a locking pin to improve terrain adaptability and simplify the operation process.
2. Anti leakage secondary chamber structure
-The piston rod is equipped with a secondary chamber and a small piston rod, and the central through-hole is connected to the oil circuit. Combined with a mechanical locking handle, it completely solves the problem of automatic extension of the piston rod during driving.
3. Automatic leveling system
-Integrated tilt angle sensor, PLC controller and solenoid valve, real-time detection of platform tilt, and control of leg micro adjustment and leveling through speed regulating valve.
3、 Technical parameters and performance indicators
Taking the SANCHI leg cylinder as an example:
|* * Parameter * * | * * Range/Value * * | * * Explanation * *|
|-------------------|---------------------|---------------------------------------|
|Piston diameter | 80-250 mm | Bearing area determines thrust|
|Rod diameter | 50-130 mm | Double plated with hard chrome on the surface, shear resistant|
|Travel | ≤ 750 mm | Scalable with multi-level expansion capability|
|Work pressure | ≤ 450 bar | Peak pressure supports instantaneous overload|
|Support capacity | ≤ 2500 kN | Approximately 250 tons of bearing capacity|
|Temperature adaptability | -10 ° C to+80 ° C | Optional low-temperature dedicated model|
> �� ** Safety design: It is recommended that the actual load be ≤ 80% of the rated value (such as ASME B30.1 standard).
4、 Typical application scenarios
1. Engineering lifting equipment
-Truck mounted crane: After the legs extend, the support span increases, stabilizing the vehicle body (such as the 0833M model, which is listed as a new industrial product in Zhejiang Province).
2. Special vehicles
-Road clearing vehicle and bridge inspection vehicle: They need to adapt to sloping road surfaces and can rotate their legs to improve leveling efficiency.
3. Emergency and infrastructure equipment
-Fangcang support legs, high-altitude work platform: rely on automatic leveling system to maintain level in complex terrain.
4. Mining Machinery
-Excavator chassis: high anti vibration sealing design to cope with harsh working conditions.
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