As a key actuating element in the field of hydraulic transmission, orbital motor is widely used in construction machinery, agricultural equipment and automation systems due to its compact structure and high torque density. HANJIU, as an orbital motor supplier with many years of professional experience, has been developing its products with high efficiency and reliability due to the precise design and manufacture of the following core structures.
1.Core Components and Functions
(1) Cycloid Gear
This is the core of energy conversion. The stator is a fixed internal gear, the rotor is an external gear, and the tooth shape of both is based on a precise pendulum curve design. The key parameters are the fixed eccentric distance between the rotor and stator center and the difference in the number of teeth. This design forces the rotor to roll in the stator for planetary eccentricity.
(2) Sealing Chambers and Volume Change
The planetary motion of the rotor creates a number of separate sealing chambers between the rotor and stator tooth profile. During the rolling process:
Oil inlet area: chamber volume increases → high pressure oil intake
Oil discharge area: chamber volume decreases → low pressure oil discharge
The number of chambers directly affects the smoothness of the output torque.
(3) Power output mechanism
The eccentric shaft runs through the center of the rotor and its eccentric section fits tightly into the rotor bore. The complex planetary motion of the rotor is converted into a pure rotational output around the center of the shaft by the geometrical constraints of the eccentric shaft. This is the core hub of torque transmission.
(4) Hydraulic oil flow control
The flow distribution shaft/disk controls the flow of oil through internal precision oil circuits. It rotates in strict synchronization with the eccentric shaft to ensure that:
High pressure oil is precisely introduced into the chamber with increased volume
Low pressure oil is promptly withdrawn from the chamber with reduced volume
The synchronization accuracy directly determines the efficiency and smoothness of operation of the motor.
(5) Key Auxiliary Components
End caps: provide sealing and structural support
Bearings: support radial/axial loads on the eccentric shaft
Wear-resistant side plates: minimize end leakage and wear
(6) Design Essentials and Performance Advantages
The high performance of the Hanjiu orbital motor is based on three core design principles:
Differential gearing in conjunction with eccentricity: forces planetary motion and creates a variable-volume chamber;
Precise flow timing: ensures that oil flows in and out of the motor in precise phase; Compact space integration: all components work together precisely to achieve high torque density and low noise. Precise flow sequencing: ensures that oil enters and exits the motor precisely in accordance with the phase of motion;
Compact space integration: all components are precisely coordinated to achieve high torque density and low noise.
The outstanding performance of orbital motor is based on the in-depth mastery of the core elements such as stator and rotor tooth shape, eccentricity, motion conversion mechanism and synchronization of flow distribution. As an outstanding supplier of orbital motors, Hanjiu relies on many years of specialized production experience and continuous process innovation to ensure the precise fit and durability of the internal structure of each motor, providing customers around the world with efficient and stable hydraulic drive solutions.
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