QJY Reducer

Overview of QJY Reducer

The QJY Reducer is a hard-tooth surface gearbox, featuring a carburized and quenched tooth surface. Designed specifically for cranes, it plays a vital role in various crane mechanisms. Furthermore, it is well-suited for other types of machinery, such as transportation systems, metallurgy equipment, mining operations, chemical processing units, and light industrial tools, where reliable power transmission is crucial.

Features

• Materials:
  Engineers utilize high-quality, low-carbon alloy steel to craft the gears. After carburizing and quenching, these gears achieve a remarkable accuracy grade of 6.
• Performance:
  The gearbox delivers several advantages, including high precision, exceptional efficiency, smooth transmission, and reduced noise levels. Compared to the QJ series tempered gearbox, it surpasses its predecessor with a more compact size, lighter weight, higher load capacity, and enhanced reliability.
• Structure:
  The design incorporates a welded housing, providing robustness and durability. Additionally, the structure supports both three-point mounting and base mounting options, ensuring flexibility.
• Output Shaft Types:
  The QJY Reducer offers four output shaft configurations: flat key, involute spline, gear shaft end, and hollow shaft, catering to diverse application needs.
• Lubrication and Cooling:
  For lubrication, manufacturers typically use an oil sump system paired with natural cooling. However, for vertical gearboxes, they adopt a circulating oil lubrication system. Additionally, the reducer employs rolling bearings to enhance performance.

Operating Conditions

• Input Speed:
  The gearbox operates effectively at input speeds below 1500 r/min.
• Temperature Range:
  With a wide operational range, it functions reliably in temperatures between -40°C and +50°C.
• Directional Operation:
  Its ability to perform bi-directional operation increases adaptability across various crane gearbox types.
• Mounting Options:
  The QJY Reducer provides multiple assembly configurations, offering versatile solutions for a variety of applications.

Assembly form

QJYD2: Shape and dimensions table

QJYD3: Shape and dimensions table

QJYD23: Shape and dimensions table

QJYD34: Shape and dimensions table

Output Shaft Types and Dimensions

allowable maximum radial loads for the gearbox’s output shaft

Center distance		140	170	200	236	280	335	370	400	450	500	560	630	710	800
Maximum permissible radial load（KN）	2	9	15	21	28	35	43	55	60	75	100	107	120	150	170
	3,4	9	15	28	35	48	55	64	93	120	150	170	200	240	260