Working principle of Serpentine Spring Coupling structure

The Serpentine Spring Coupling is a flexible coupling with metal elastic elements. It consists of several 

groups of serpentine springs wound between the teeth of the two halves of the coupling to transmit motion and 

power. The two halves of the coupling are made on the flange. There are teeth of a specific shape. Snake springs 

are embedded between the teeth, and the outside is covered by a closed shell to prevent the snake spring from 

being thrown away under the action of centrifugal force during the operation of the coupling. out. At the same time, 

there is lubricating oil inside the protective cover to lubricate the contact between the spring and the tooth surface 

to avoid dry friction.

When the serpentine spring works, the teeth on the two half couplings and the serpentine spring squeeze each 

other, thereby transmitting the torque of the driving shaft to the driven shaft. The tooth shapes on the two halves 

of the Serpentine Spring Coupling are generally linear and curved. When the linear teeth are operating 

normally, the contact point between the serpentine spring and the two half coupling teeth does not change with 

the change of the transmission torque. The transmission torque has a linear relationship with the relative torsion 

angle of the two half couplings. Therefore, the stiffness of the coupling remains unchanged. The snake spring 

coupling with this tooth shape becomes a constant stiffness snake spring coupling. It is easy to manufacture and is 

suitable for situations where the torque changes little. Curved teeth. During normal operation, the bending of the 

snake spring on the tooth block surface approximates line contact in the direction of the section plane. The distance 

between the contact points between the snake spring and the teeth on the two halves of the coupling will increase 

as the torque increases. Reducing, the torque has a nonlinear relationship with the relative torsion angle of the two 

half couplings, so the stiffness of the coupling changes. The snake spring coupling with this tooth shape becomes a 

stiffness snake spring coupling.

There are nine types of serpentine spring couplings, which can be divided into:

JS cover radial mounting type (basic type) serpentine spring coupling

JSB cover axially mounted serpentine spring coupling

JSS double flange connection type snake spring coupling

JSD single flange connection type serpentine spring coupling

SJS connected to intermediate shaft type serpentine spring coupling

JSG high speed serpentine spring coupling

JSZ serpentine spring coupling with brake wheel

JSP serpentine spring coupling with brake disc

JSA safety serpentine spring coupling, etc.

The Snake Spring Coupling connects two coaxial medium and high-power transmission shaft systems. It has 

certain compensation for the relative offset of the two axes and vibration damping and buffering properties. The 

working temperature is -30℃~+150℃, and it transmits nominal rotational speed. Moment 45~800000N.m. Mainly 

used in stone crushers, crank reciprocating motion, reducers, metallurgy, mining, lifting machinery, etc.