Ferris wheel car four point contact ball slewing support

• When the driving system of the Ferris wheel drives the rotating shaft to rotate, the inner ring connected to the rotating shaft also rotates. Due to the four point contact between the steel ball and the raceway of the inner and outer rings, the steel ball rolls in the raceway under
• the driving of the inner ring, thereby achieving smooth rotation of the outer ring and the Ferris wheel car connected to the outer ring. In this process, the four point contact design enables the steel ball to evenly transmit the weight of the car, centrifugal force, and other external forces to the inner and outer rings, while bearing loads from different directions, ensuring the safe and stable operation of the Ferris wheel.

• • Inner ring: It is usually made of high-strength alloy steel, such as 50Mn or 42CrMo. The inner ring is connected to the rotating shaft of the Ferris wheel and ensures synchronous rotation with the shaft through interference fit or key connection, providing internal support for the entire slewing support.
    Outer Ring: Similar in material to the inner ring, it is a component connected to the Ferris wheel car. Its outer surface usually has mounting holes, which are used to fix the car to the slewing support through bolts or rivets and other connecting parts, bearing the weight and various forces from the car.
    Steel ball: As a rolling element, it is generally made of carbon chromium bearing steel that has been quenched as a whole, such as GCr15, which has high hardness, strength, and wear resistance. The steel ball forms a four point contact with the circular arc raceway of the inner and outer rings, evenly distributed between the inner and outer rings, achieving relative rolling between the inner and outer rings while bearing and transmitting a load of 124.
    Retainer: It is usually made of materials such as copper alloy, aluminum alloy, or high-strength engineering plastic. Its function is to evenly separate and keep the steel balls in the correct position, prevent collisions and friction between the steel balls, ensure the uniform distribution of the steel balls on the raceway, and enable the load to be evenly transmitted.
    Sealing device: generally composed of rubber sealing rings, metal sealing rings, or combination seals, installed between the inner and outer rings, used to prevent lubricating oil leakage, and prevent external dust, moisture, and impurities from entering the interior of the slewing bearing, ensuring its normal operation and service life.

• • High load-bearing capacity: The design of the four point contact increases the contact area between the steel ball and the raceway, which can simultaneously withstand large axial forces, radial forces, and overturning moments, meeting the various load requirements generated by the Ferris wheel car during operation.
    Good turning stability: When the steel ball rolls in the raceway, the four point contact method can effectively reduce the vibration and noise during the rolling process, making the turning motion of the Ferris wheel car smoother and providing passengers with a comfortable riding experience.
    Compact structure: Compared with other types of slewing bearings, the structure of a single row four point contact ball slewing bearing is relatively simple and compact, occupying less space, which is conducive to the overall design and layout of the Ferris wheel. While meeting the requirements of bearing capacity, it can reduce the overall weight of the Ferris wheel.
    Easy installation: The installation holes on the inner and outer rings are designed to make the installation and disassembly between the slewing bearing, the rotating shaft of the Ferris wheel, and the car more convenient and efficient, facilitating the installation, debugging, and later maintenance of the equipment.

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