I. Model Types
Serpentine spring couplings come in nine standard structural forms, classified by function and application scenario as follows:
‌JS Housed Radial Mounting Type (Basic Type)

• Applicable Scenario: General mechanical transmission, easy installation.
  ‌JSB Housed Axial Mounting Type

• Applicable Scenario: Shaft system connections where space is limited.
  ‌JSS Double Flange Connection Type

• Applicable Scenario: Transmission systems requiring flange butt-joints.
  ‌JSD Single Flange Connection Type

• Applicable Scenario: Light-duty transmission with one-sided flange fixation.
  ‌SJS With Intermediate Shaft Type

• Applicable Scenario: Long-distance shaft system transmission requiring intermediate shaft support.
  ‌JSG High-Speed Type

• Applicable Scenario: High-speed applications (e.g., fans, compressors).
  ‌JSZ With Brake Wheel Type

• Applicable Scenario: Equipment requiring emergency braking (e.g., cranes).
  ‌JSP With Brake Disc Type

• Applicable Scenario: Disc brake systems (e.g., elevators).
  ‌JSA Safety Type

• Applicable Scenario: Applications with overload protection requirements (e.g., conveyors).

II. Structural Composition
The core structure of the serpentine spring coupling consists of the following components:
‌Half-Coupling (Hub)

• One for the driving end and one for the driven end. Shaft bore dimensions are customized according to user requirements.
  ‌Serpentine Spring Leaf

• A spring leaf with a trapezoidal cross-section, made of high-quality spring steel (e.g., 60Si2Mn). It undergoes heat treatment and sandblasting for a long service life.

• Number of leaves: 2-8 (depending on model). Outer diameter: 80-900mm. Thickness: 2.5-20mm.
  ‌Outer Cover (Housing)

• Composed of two semi-circular shells. The enclosed design prevents the spring from being thrown out.
  ‌Sealing Elements

• Includes two sealing rings and two sealing gaskets to prevent lubricant leakage.
  ‌Tension Sleeve Assembly (Optional)

• Adjusts the spring preload to ensure transmission stability.

III. Main Dimensional Parameters
The dimensions of serpentine spring couplings vary by model. The following are typical parameter ranges:
‌Nominal Torque: 45-800,000 N·m (increasing with model type).
‌Shaft Bore Diameter: 40-300mm (common specifications include 41mm, 136mm).
‌Outer Diameter: 80-900mm (matching the outer diameter of the spring leaf).
‌Length: 100-500mm (adjusted based on model and shaft bore length).
‌Allowable Misalignment:
* Radial displacement: 0.5-3mm.
* Axial displacement: 4-20mm.
* Angular displacement: 1°15′.
‌Operating Temperature: -30°C to +150°C (adaptable to extreme environments).

IV. Industry Applications and Selection Recommendations
‌Metallurgical Equipment: Select the JSG High-Speed type or increase the spring cross-sectional thickness (h/b ratio) to enhance torque capacity.
‌Lifting Machinery: Prioritize the JSZ With Brake Wheel type to simplify the connection between the drum and the reducer shaft system.
‌Belt Conveyors: Recommend the SJS With Intermediate Shaft type to accommodate long-distance transmission needs.

‌Installation Tip: During installation, remove impurities from the tooth sleeve, assemble in sequence, and ensure misalignment is within the allowable range.