handle chute Lifting screw rear shorter L=51 cm mixer truck LIEBHERR
Product Details
liebherr truck oil cooler
,liebherr mixer truck parts
cheap price handle chute
Lifting screw rear shorter L=51 cm mixer truck LIEBHERR
Durable mixer parts, exquisite workmanship
Color:Customized
Lead Time:30 days
ISO 9001:2015 certification
1. Product Parameter (specification)
The lifting screw at the rear of the Liebherr mixer truck with a length (L = 51space cm) is an important component for adjusting the height and angle of the discharge chute.
Structure: Usually, it consists of a screw rod, a nut, a support frame, and a drive mechanism. The screw rod is threaded and meshes with the nut. The support frame fixes the screw rod and nut, and the drive mechanism provides the power to rotate the screw rod.
Function: By rotating the screw rod, the nut moves along the thread of the screw rod, thereby driving the connected discharge chute to move up or down. This allows for precise adjustment of the height and angle of the discharge chute, enabling the concrete to be accurately discharged at the desired position and angle, which is very important for different construction site requirements and pouring operations.
Detailed Explanation of Core Technical Parameters
(1) Dimension Specifications
|
Parameter Category |
Value Range |
Remarks |
|
Lifting Stroke |
2–3m for regular models; up to 4–5m for high-end models |
Lifting height of the discharge chute, adapted to pouring height requirements of different scenarios |
|
Rod Diameter |
Hydraulic main cylinder: φ80–120mm; Auxiliary support rod: φ50–80mm |
The diameter of the main cylinder determines the thrust, and the auxiliary support rod is used for stability |
|
Rod Length |
1.5–2.5m in retracted state; 3–5m in extended state |
Matched with the length of the discharge chute according to the vehicle model. For common L53 and L55 series, it is about 2.2–2.8m |
|
Mounting Hole Distance |
Distance between main hinge points: 300–500mm; Hole diameter: φ20–25mm |
The common hole diameter of manual discharge support rods is φ21mm, adapted to pin shaft fixation |
|
Telescopic Speed |
0.15–0.3m/s |
Determined by the flow rate of the hydraulic pump and cylinder diameter, balancing stability and efficiency |
(2) Load Capacity and Mechanical Parameters
|
Parameter Category |
Value Range |
Remarks |
|
Rated Lifting Force |
15–30kN (1.5–3 tons) |
Safe lifting force for fully-loaded discharge chutes (including concrete) |
|
Maximum Thrust |
35–50kN |
Peak output of the hydraulic system, used to overcome heavy loads and inertia |
|
Rated Working Pressure |
20–25MPa |
Working pressure of the main hydraulic cylinder, matched with the vehicle hydraulic system (mostly 21–24MPa) |
|
Safety Factor |
≥1.5 |
Structural design redundancy to prevent overload and fatigue fracture |
|
Overturning Stabilizing Torque |
≥50kN·m |
Ensure the rollover stability of the whole vehicle when lifted to the maximum height |
(3) Service Life and Reliability Parameters
|
Parameter Category |
Value Range |
Remarks |
|
Designed Service Life |
8,000–12,000 working hours |
Calculated based on 8 working hours per day and 250 working days per year, about 4–6 years |
|
Fatigue Cycle Times |
≥5×10⁴ cycles |
Full-stroke lifting cycles, guaranteed by materials and heat treatment processes |
|
Seal Service Life |
2,000–3,000 working hours |
Need regular replacement, adapted to working temperatures from -20℃ to 80℃ |
|
Wear-resistant Coating Life |
≥4,000 hours |
Chrome-plated/ceramic coating on the rod surface, resistant to corrosion and wear |
|
Maintenance Cycle |
500–1,000 working hours |
Including hydraulic oil replacement, pin shaft lubrication and seal inspection |
Key Factors Affecting Parameters
Vehicle Model and Configuration: Small mixer trucks (6–8m³) have short stroke and low lifting force; large trucks (12–16m³) have upgraded parameters, adapted to heavy load and high pouring requirements.
Hydraulic System: The flow rate of the pump, response speed of the valve group and pressure level directly affect the lifting speed and thrust.
Working Conditions and Maintenance: Frequent heavy load operation, high/low temperature environment or improper maintenance will shorten the actual service life.
Key Points for Selection and Maintenance
Selection Matching: Select lifting rods with corresponding stroke and lifting force according to the mixing tank capacity, discharge height and operation frequency to avoid under-matching.
Maintenance Key Points: Regularly check the cleanliness of hydraulic oil (within NAS 8 level), seal leakage, pin shaft lubrication and rod coating, and replace vulnerable parts according to the cycle.
Safe Operation: It is strictly prohibited to use the equipment with overload or over-stroke. Keep the whole vehicle level when lifting to avoid structural damage caused by eccentric load
Precautions for Special Working Conditions and Emergency Handling
Extreme Environment Operation: Under high-temperature environment (exceeding 80℃), it is necessary to shorten the operation time, regularly check the hydraulic oil temperature, and take cooling measures if necessary; under low-temperature environment (below -20℃), preheat the hydraulic system before operation to ensure good fluidity of hydraulic oil and avoid seal failure due to hardening at low temperature.
Fault Emergency Handling: When faults such as leakage, jamming, weakness, or abnormal noise occur during operation, stop the operation immediately, lower the lifting rod to a safe position (if it cannot be lowered, set up warning signs and support the discharge chute), cut off the power source before troubleshooting; it is strictly prohibited to force operation before the fault is eliminated.
Emergency Disposal: In case of emergencies such as sudden falling of the lifting rod or vehicle tilting, operators shall immediately evacuate to a safe area, call the emergency rescue number, and it is strictly prohibited to rescue blindly; later, professional maintenance personnel shall inspect and repair the equipment, and it can be put back into use only after confirming safety.
·
Concrete Mixer Truck Drum Handle Chute
OEM part number:533595603700
Parameters:
- cylinder length: approx. 510 mm
- inner pitch on bracket: approx. 60 mm
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