A coupling is a mechanical part that connects two axes (drive shaft and driven shaft) in different mechanisms so that they rotate together to transmit torque. Some couplings also play a role in cushioning, damping and improving the dynamic performance of shafting in high-speed and heavy-duty power transmission. The connecting shaft is composed of two half parts, respectively connecting the drive shaft and the driven shaft. General power machinery mostly adopts the way of coupling and working machinery connection.

Coupling is divided into two categories: material bending and mechanical bending. Flexible materials are obtained by stretching or compressing an elastic material (such as rubber) or a metal sheet or mesh. With the exception of gate couplings, material flexible couplings require no lubrication.

Flexible couplings can withstand misalignments caused by rocking, rolling or sliding metal surfaces. All metal mechanical flexible joints need lubrication.

First, material flexible coupling.

Material flexible couplings generally do not require lubrication, can operate in shear or compression conditions, and can withstand Angle, parallelism and axial misalignment.

For example, jaw type, sleeve type, wheel type, disk type, mesh format, diaphragm type and other materials flexible coupling.

1. Jaw coupler

A gripper connector is a material flexible connector that transmits torque through the pressure of an elastic star joint between two meshing grippers.

Elastic elements are usually made of NBR, PU, Hytrel or bronze.

Suitable for all kinds of axial errors

Transfer moment

Torsional damping

Small torque, multi-purpose.

2, sleeve coupling

Sleeve couplings transmit a low to moderate torque to cut between connected devices through elastic inserts that have a raised spline to fit with the splined hub. The material of the interpolator is usually EPDM, neoprene, or Hytrel, and the interpolator may be in one or both forms.

Medium error of different axes.

Torque damping

Floating end, small axial clearance.

Torque medium, suitable for average.

3. Wheel coupling.

The utility model has a rubber or polyurethane element connecting two wheel hubs. Rubber parts transfer torque through shear.

Reduce the transmission of impact force and vibration.

Highly calibrated capability.

It can be easily assembled without moving hubs or connecting devices.

Mid-course driving

Wide torque range.

4, disc coupling

A disc clutch is formed by transferring torque through a flexible disc element. The method of operation is to tighten the string segment on the ordinary bolt circle and press the bolt alternately between the drive and the driven side. The coupling generally consists of two hubs, two disc units and a central component. Separate disc packaging accommodates angular and axial misalignments. In order to make the parallel misalignment, two disc packs are required.

The allowable angles are parallel and axial.

This is the true ultimate floating design.

Zero backlash design

High speed rating and balance.

/, diaphragm coupling.

Diaphragm couplings use one or a series of plates or diaphragms as flexible elements. Torque is transmitted from the outside diameter of the soft plate to the inside diameter and then from the inside diameter to the outside diameter through the spool or gasket. The deviation of the outer diameter from the inner diameter occurs when the diaphragm is not punctual. For example, axial displacement attempts to stretch the diaphragm, thereby extending and bending the diaphragm profile.

Allowable angular, parallel, and high axis deviations.

Suitable for high speed and high torque.

Second, mechanical flexible coupling.

Flexible couplings can withstand coaxial errors due to rocking, rolling or sliding metal surfaces. All metal mechanical flexible joints need lubrication.

Examples of flexible couplings are gear, lattice, and roller chain couplings.

1, gearbox coupling

Geared couplings deliver maximum torque and torque at the smallest diameter of any flexible coupling.

Each coupling consists of two wheel hubs with crown teeth. Splined flange sleeve inside hub joined by two bolts. The tooth surface coupling can adjust the Angle and axial misalignment by the crown gear tooth against the swing and slide of the sleeve tooth. Parallel misalignment can be resolved by two adjacent hub/sleeve bend points. The gear coupling is lubricated regularly according to the needs of use. They are very sensitive to lubrication failures, but if properly installed and maintained, these couplings can last 3-5 years and sometimes even decades.

2, grid coupling.

The lattice coupling consists of two radially slotted hubs engaged with serpentine spring steel, and the lattice provides torsional damping of elastic rubber and high strength flexibility.

The grille coupling transmits torque in a way that matches the axially biased conical grille and ADAPTS to parallel and axial misalignment angles from one hub to the other. The cross section of the grid is usually tapered to allow better contact with the hub and easier assembly. Lubrication is required because there is movement between the metal parts in contact with the wheel hub and the grid.

3, rolling chain coupling.

A rolling chain coupling consists of two radial chain hubs which are meshed together by a pair of pitch pitches of the roller chain. The link is suitable for low to medium torque and speed applications. The meshing of sprocket teeth and chain transmits torque, and the relevant clearance can be adapted to the case that the Angle of parallel alignment is not aligned in the axial direction.

The link needs to be lubricated periodically, depending on the use. In general, brush lubricant on the chain and keep the coupling lubricated with a lid.