Pit-type Fixed Jacking Unit for 6-Car Metro Train Lifting & Maintenance
- Category： Railway Maintenance Workshop Equipment
- Lifting capacity: ≤ 200t
- Overall length: approximately.110m
- Installation type: Pit type
- Synchronous lifting precision:8mm
Pit-type Fixed Jacking Unit for 6-Car Metro Train Lifting & Maintenance
1. Brief introduction:
Our integrated underground fixed jacking unit is specifically designed for metro maintenance, installed in underground foundation pits to realize safe lifting and lowering operations for entire trains (6 cars), train units (3 cars) or single cars. It provides a safe, reliable and efficient working environment for metro maintenance personnel, ensuring smooth and secure daily inspection and maintenance of metro trains.
Capable of safely lifting metro trains weighing up to approximately 200 tons, this fixed jacking unit relies on the dual protection of an intelligent control system and a robust mechanical structure, making it a core equipment for modern metro maintenance workshops.
2. Core features & technical advantages:
• High Synchronization Precision: The intelligent control system displays the height of each jacking point in real time. Within the overall length of about 110 meters, the synchronization precision of 24 jacking points is ≤ ±4mm. When the height difference between any two jacking points reaches 8mm, the system automatically adjusts to keep the difference below 8mm, ensuring stable lifting.
• Stable Lifting Mechanism: The lifting unit is driven by a motor reduction gearbox (Siemens, Germany) and adopts screw transmission, which enables smooth and steady lifting of the train without vibration, effectively protecting the train body and internal components.
• Compact & Space-Saving Design: All lifting units are hidden in underground pits when not in use. After the lifting and lowering operation, all equipment is lowered back into the pit, leaving the garage floor flat and obstacle-free, maximizing the utilization of workshop space.
• Comprehensive Safety Protection: Equipped with full and reliable detection and safety protection systems, adopting advanced Siemens (Germany) PLC control and self-locking screw load-bearing structure. It ensures safe maintenance operations (both on-board and under-vehicle) in both jacking mechanism support state (without lowering the bogie) and car body bracket support state (with bogie lowered), and long-term support operation will not affect the equipment performance and service life.
3. Equipment composition:
With an overall length of about 110 meters, the unit consists of 1 set of intelligent control system and 12 or 6 sets of jacking devices. Each jacking device includes:
• 1 set of bogie lifting unit
• 1 set of car body lifting unit
• 1 set of fixed track bridge
• 1 set of fixed cover plate
4. Main technical parameters:
Parameter Item
Technical Specification
Remarks
Overall Length
Approx. 110 m
Along the train track direction
Marshalling Capacity
6-car entire train / 3-car unit / single car
Supports flexible operation modes
Equipment Composition
1 set of intelligent control system + 12 sets of jacking devices
Each set includes bogie lifting unit, car body lifting unit, fixed track bridge and fixed cover plate
Installation Type
Pit-type (installed in underground foundation pit)
Fully lowered into the pit after operation, no obstacles on the ground
Maximum Total Lifting Weight
≤ 200 t
Suitable for 6-car entire metro train
Number of Lifting Points
24
Distributed within 110 meters
Synchronous Lifting Precision
≤ ±4 mm
Real-time dynamic control
Height Difference Protection Threshold
8 mm
Automatic adjustment when threshold is reached to ensure safety
Lifting Drive Mode
Screw transmission (self-locking function)
Driven by reduction motor, with mechanical self-locking
Operation Status
Jacking mechanism support / car body bracket support
Both states support long-term safe operation
Core of Control System
Siemens PLC
Genuine German import, advanced performance
Drive Motor
Siemens reduction motor
Genuine German import, stable power
Operation Mode
Console centralized control + wireless remote control
Dual operation modes, convenient and efficient
Safety Protection
Comprehensive detection system + multiple interlock protection
Including overload, limit, synchronization deviation protection, etc.
5. Working process:
5.1 Lifting Operation:
- A shunting locomotive or road-rail vehicle pulls the train to the jacking position and aligns it correctly.
- The jacking mechanism lifts the vehicle (with bogie) to the set height.
- Disconnect the connection between the bogie and the car body.
- Raise the car body bracket to support the car body, lower the jacking mechanism together with the bogie, and push out the bogie.
5.2 Lowering Operation:
It is the reverse process of the lifting operation. After the completion of lifting and lowering operations, all equipment is lowered into the pit, ensuring the garage floor is flat and unobstructed.
6.Application scenario:
Widely used in metro maintenance workshops, it is suitable for daily inspection, bogie replacement, and key component maintenance of metro trains. It effectively improves maintenance efficiency, reduces labor intensity, and ensures the safe operation of metro lines.
We are committed to providing high-quality, reliable metro maintenance equipment. With advanced technology, strict quality control and perfect after-sales service, we bring professional solutions to global metro operation and maintenance customers. Contact us for more details and customized services.
7. Detail photos:
8. Video:
