20Ton Span 22.5M European Style Double Girder Crane End Carriage
For Bridge Crane
Technical Parameters:
| Drive System | Standard three-phase asynchronous motor + hardened tooth surface
reducer |
| End Beam Design | Open tooth transmission with gear-rack meshing drive |
| Applicable Main Beam Span | 22.5 meters |
| Safety Protection | Limit switch, buffer device, overload protection |
| Warranty | 12 Months |
| Braking Device | Normally closed electromagnetic brake for automatic locking |
| Condition | New |
| Wheel Set | Equipped with cast steel wheels, adapted to QU-type tracks |
| Carrying Capacity | 20tons, suitable for medium industrial scenarios |
| Adaptability | High-strength bolt connection with the main beam, expandable
configuration |
1. Precision connection and leveling mechanism:
High-strength connection flange: The top of the end beam is rigidly
connected to the ends of the two main beams through a large,
high-precision processed flange. The connection bolts are of high
specifications and large quantities, and the preload requirements
are strict.
Leveling device: Usually equipped with a precision pin joint + shim
set or hydraulic leveling device. It is used to compensate for
track height differences, installation errors or foundation
settlement during installation or later to ensure that the two main
beams are on the same horizontal plane, which is crucial for the
normal operation of double-beam cranes.
2. Ultra-large capacity buffer device:
Heavy-duty polyurethane buffers or hydraulic buffers are installed
at both ends of the end beam, with extremely high energy absorption
capacity (much greater than single beams) to safely absorb
collision energy at a full load speed of 20tons.
3. Integrated safety device interface:
Trolley travel limit impact ruler: Strong and reliable, triggering
the limit switches installed at both ends of the track.
Anti-collision system interface: Supports the installation of
laser/radar ranging sensors for multiple cranes sharing tracks or
close to obstacles.
Load monitoring interface: Connect accurate electronic weighing
sensor (often installed on the main beam or lifting mechanism).
Anemometer interface (outdoor): Monitor wind speed, alarm or shut
down when over limit.
Sound and light alarm: Integrated installation point.
4. Strict track requirements:
Track specifications: Tracks with extremely strong load-bearing
capacity must be used, such as QU80, QU100, QU120 special crane
rails, or strictly verified heavy-duty welded box beams/H-shaped
steel (such as IPB series). Ordinary I-beams or light QU rails
cannot meet the requirements.
Installation accuracy: The straightness, horizontality (especially
the relative height difference between the two rails), gauge
accuracy, joint gap and smoothness, and fixing strength
(high-strength pressure plates, bolts) of the track have extremely
strict standards. The installation must be completed by a
professional team.
Frequency conversion control system (almost standard):
Necessity: For 20-ton double-beam cranes, frequency conversion
speed regulation is standard or highly recommended. Reasons:
Eliminate start-stop shock: Smooth acceleration and deceleration
under huge inertial force to protect structures and cargo.
Millimeter-level precision positioning: Achieve fine operation
under heavy load.
Precise synchronization of multiple motors: Ensure consistent drive
speeds at all four corners to avoid distortion.
Wide speed range: High speed at no load improves efficiency, and
low speed at heavy load ensures safety.
