1.Open pinion type end carriage
Open pinion type end carriage refers to a design in which the transmission gears (primarily large gears) are completely exposed to the outside environment, without the protection of an enclosed gearbox.
Structure and Operating Principle:
● End beam body: as a supporting structure, with wheels mounted at both ends.
● Geared-motor: install on the body of end beam.
● Gear : A small gear is mounted on the output shaft of the reducer, directly meshing with a large gear fixed to the wheel axle. This pair of gears is not covered by any housing and is “open.”
Features:
● Simple structure, low manufacturing and maintenance costs: The gearbox is eliminated, resulting in a small number of parts.
● Good heat dissipation: The gears are directly exposed to the air, making heat dissipation easier.
● Easy inspection: The meshing condition, wear, and lubrication status of the gears can be visually inspected.
Applicable scenarios:
Primarily used in applications with low hygiene requirements, low-level (infrequent) work, slow speeds, and strict cost control, such as older, lightweight, or workshop-based cranes.
2. Hollow Shaft type end carriage
Structure and operating principle:
● body: Also a supporting structure.
“Geared motor: Modern cranes often use a “three-in-one” drive unit that integrates a motor, brake, and reducer.
● Enclosed gearbox: The entire drive system (angular bearings, wheel axles, large and small gears) is sealed in a gearbox filled with lubricating oil. The output shaft of the drive unit (such as Geared motor) directly drives the wheel axle through a coupling.
Features:
● Advantages:
● Excellent lubrication and low wear: Gears and bearings are splash lubricated in an oil sump or use forced lubrication, providing sufficient and reliable lubrication and long service life.
● Excellent sealing and anti-contamination: Effectively prevents the ingress of external impurities, suitable for harsh environments (such as dusty, humid workshops, and outdoor environments).
● Smooth operation and low noise: The gearbox acts as a soundproofing and buffer.
● High safety: All moving parts are enclosed, eliminating the risk of entrapment.
● Long maintenance-free intervals: Only regular inspection or replacement of the gear oil is required, with no frequent relubrication of grease required.
Applicable Applications:
This is the most mainstream and standard configuration for modern bridge and gantry cranes. It is suitable for all medium- and heavy-duty industrial applications with high workloads (busy workloads), harsh environments, and requirements for long equipment life and easy maintenance.
Post time: Oct-10-2025