QTZ63 Tower Crane

    The Tielisi QTZ63(5010) tower crane is an upper-rotating, self-erecting tower crane with a horizontal jib, developed by Hongda Group based on over two decades of tower crane design and manufacturing expertise. It complies with standards including GB/T5031 <> and GB5144<<Safety Regulations for Tower Cranes>>. This crane features the following characteristics:

    1) Advanced performance parameters, high lifting capacity, great lifting height, large working radius, extensive operating range, and high operational efficiency.

    2) The machine features an aesthetically pleasing design, lightweight steel structure, and premium materials that undergo shot peening and rustproofing pretreatment. Standard sections are fabricated using jig welding and machining for excellent interchangeability. The forward-inclined tower top simplifies stress distribution. Pin-and-high-strength-bolt connections facilitate easy assembly and disassembly. The side-mounted operator cab provides expansive visibility, with an ergonomically adjustable seat for comfortable operation.

    3) This machine features fixed and attached working configurations, meeting the needs of various construction projects such as mid-to-high-rise buildings in urban areas, industrial plants, power station dams, and bridges.

    4) The hoisting mechanism employs three-speed motor speed regulation technology to achieve optimal lifting speeds and precise load positioning. The slewing mechanism utilizes variable frequency stepless speed control technology or a hydraulic coupling for smooth operation. The traction mechanism is driven by a dual-speed motor, ensuring accurate positioning.

    5) The electrical control system adopts an internationally standardized configuration, featuring imported low-voltage electrical components arranged in a modular assembly with DIN rail mounting. Operation is centralized via two cross-type master controllers and pushbutton switches located in the driver's cab. The entire electrical control cabinet is compatible with 380V-440V (50Hz-60Hz) power supplies.

    6) All safety devices are fully equipped, featuring torque, weight, boom extension, and height monitoring functions, along with alarm and self-locking capabilities.

QTZ63 (5010) Technical Specifications 

【Hoisting Mechanism】:

     The hoisting mechanism employs an YZTD200L2-4/8/24 wound-rotor motor. The motor drives the gearbox via a spline coupling, which in turn drives the drum. This configuration enables three distinct hoisting speeds, ensuring smooth start/stop operation with minimal impact. With a 2-rope configuration, speeds reach 58 m/min, 29 m/min, and 8 m/min. A 4-rope setup achieves 29 m/min, 14.5 m/min, and 4 m/min.

【Rotary Mechanism】:

     The slewing mechanism is the transmission device that provides power for the upper slewing of the tower crane. This device consists of a torque motor (equipped with a normally closed brake at the rear), a planetary reducer, a pinion gear, and a slewing limiter. A standard slewing mechanism comprises a wound-rotor motor, hydraulic coupling, electromagnetic brake, planetary gear reducer, pinion gear, and slewing limiter. This tower crane employs such a mechanism mounted on one side of the slewing bearing, installed on the upper support. Its pinion gear meshes with the large ring gear of the slewing bearing.

【Variable-Angle Mechanism】:

      The boom hoist mechanism employs a dual-speed YEZS112L-4/8 motor. This motor drives the drum via a planetary gear reducer, enabling the load trolley to traverse the boom at three speeds—40 m/min, 20 m/min—through wire rope operation. A disc brake is integrated at the motor tail, providing delayed braking when the trolley motor power is cut off. The boom limit switch prevents misoperation by halting the trolley before it contacts the buffer at the boom base.

【Upper and Lower Supports】:

     The upper bearing is mounted on the slewing ring and connected to its inner ring. The lower bearing is a box-shaped support for the non-rotating section of the crane. Its upper surface is fitted with the outer gear ring of the slewing ring. The lower bearing is bolted to the outer ring of the slewing ring, enabling relative rotational movement between the upper and lower bearings via the slewing mechanism. The upper bearing connects to the rotating tower body above, while the lower bearing connects to the standard tower sections below.

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【Rotary Limit Switch】:

【Tower Top】

    The top of the tower is a truncated cone, its upper end connected to the lifting arm and counterweight arm via tie rods to maintain the horizontal alignment of both arms, while its lower end is secured with four pins to

    The rotating tower body connection features a work platform and pulley system at the top of the tower to facilitate the installation of the boom tie rods and counterweight boom tie rods.

【Driver's Cab】

   The cab serves as the operator's workstation for controlling the tower crane, fixed to the right side of the rotating tower body. The indicator lights and control handles of the integrated control console are positioned on both sides of the operator's seat, offering convenient operation and a wide field of view.

   The cab electrical control box is located at the rear of the cab, housing the main circuit breaker, lighting circuit breakers, auxiliary circuit breakers, and other devices.

【Load Limiters】:

【Electrical Control System and Safety Devices】 :

      The QTZ63 electronic control system employs a state-of-the-art PLC + variable frequency drive (VFD) control approach, significantly enhancing system reliability, operability, stability, and machine efficiency. The incorporation of a VFD enables stepless speed regulation for the slewing mechanism, substantially improving overall equipment stability. This results in markedly enhanced positioning performance and higher operational efficiency.

     The electrical control components of this system are globally sourced from leading manufacturers such as OMRON, Yaskawa, Schneider Electric (TE), and Taiwan's Mingwei. This global procurement strategy significantly reduces the failure rate of the electrical control system, providing effective assurance for enhancing users' production efficiency.  Comprehensive and reliable safety devices are included, such as: lifting height limiters, slewing limiters, and multifunctional limiters for lifting moment, load capacity, and trolley span. Additionally, electrical safety devices like anemometers and obstruction lights, as well as mechanical safety devices such as trolley shaft break protection and traction rope break anti-runaway protection, are incorporated.