Products
KWD Rail Coupling
KWD company is located in Dresden, Germany. Founded in 1887, it is a company specializing in the manufacture of couplings and occupies a special position in the German machinery industry. The company's products cover a wide range of fields and have the world's advanced technology. We focus on customer needs, provide high-standard, high-quality products, with certain competitive advantages, known as the German coupling expert.
KWD was awarded Q1 supplier by Deutsche Bahn and is currently one of a few manufacturers in Europe with a full range of couplings for rail vehicles.
The production capacity of rail transit couplings is 30,000 sets per year.
Application areas:
High-speed trains, subways and light rails, trams and trolleybuses, electric locomotives, rack cars, passenger cars
Brief Product information
I、Input coupling
1、Drive unit for flanged connection of two-bearing traction motors and gearboxes
Star elastic coupling（EZK）
·Has torsional and bending stiffness
·Compensation of radial displacement, axial displacement and angular displacement through star-shaped elastic elements
·Blind assembly
Double Membrane Disc Coupling (MEM)
Double diaphragm coupling can be equipped with torque limiter
-Dual gimbal for torsional and bending stiffness
·Compensate for radial and angular displacements by thin-walled profiles of the diaphragms on both sides
-Compensate for small radial displacement through the diaphragm on both sides
-Configurable torque limiter
-No wear
Duplex coupling: star elastic-diaphragm coupling (EZK-MEM)
·Have the dual characteristics of EZK type coupling and MEM type coupling.
-Compensate for radial displacement and angular displacement through the thin-walled profiles of the diaphragms on both sides
-Axial displacement is compensated by star-shaped elastic coupling
·Blind assembly
Gear Coupling (ZK)
Oil bath lubrication, no seals
·Double universal, with torsional stiffness, self-centering gear teeth, high specific power characteristics
-Compensate for axial displacement, radial displacement and angular displacement
-Integrated in the drive unit (gearbox), oil bath lubrication, no seals
2、Drive unit for flanged connection of single bearing traction motor to gearbox
Diaphragm Coupling (MEM)
Single-diaphragm disc, the hubs on both sides are connected with the shaft by interference
-Has torsional and bending stiffness
-Compensate for small axial and angular displacements
-High radial stiffness
-Overload protection by slip bushing
-No wear
Spiral tooth end tooth double diaphragm coupling (MEN)
Double diaphragm, one side interference connection, one end face tooth connection
-Has torsional and bending stiffness
-Compensate for small axial and angular displacements
-igh radial stiffness
-No wear
Diaphragm Coupling (MEM)
Single-diaphragm disc, the hubs on both sides are connected with the shaft by interference, with insulating function
-Has torsional and bending stiffness
-Compensate for small axial and angular displacements
-High radial stiffness
-Slip bushing is optional to realize overload protection function.
-No wear
Diaphragm Coupling (MEM)
Single-diaphragm disc, the hubs on both sides are connected with the shaft by interference
-Has torsional and bending stiffness
-Compensate for small axial and angular displacements
-High radial stiffness
-With fan function
-Integrated labyrinth seal structure
-No wear
3、For semi-suspension drives
Gear Coupling (ZK)
Adopt metal bellows seal patent structure, oil lubrication is recommended
-Double universal, with torsional stiffness, self-centering gear teeth, high specific power characteristics.
-Large compensation capacity of axial displacement, radial displacement and angular displacement
-Complete sealing of the coupling through metal bellows
-Thanks to the good sealing structure, the lubricating oil replacement cycle is long (long maintenance-free cycle)
-the lubricating medium can be replaced without disassembly (applicable to lubricating oil)
-Self-lubricating (applicable to lubricating oil or grease)
-Optional sliding bushing realizes overload protection function
-Optional insulation function
Gear Coupling (ZK)
Elastomeric seal
-Double gimbal, with torsional stiffness, self-centering gear teeth, high specific power characteristics
-Compensate for axial displacement, radial displacement and angular displacement
-Grease lubrication
-Optional sliding bushing realizes overload protection function
-Optional insulation function
Gear Coupling (ZK)
Before leaving the factory, the slip torque is pre-adjusted by the manufacturer according to the technical requirements
-Double gimbal, with torsional stiffness, self-centering gear teeth, high specific power characteristics
-Compensate for axial displacement, radial displacement and angular displacement
-Self-lubricating (applicable to lubricating oil or grease)
Gear Coupling (ZK)
Adopt metal bellows seal patent structure, oil lubrication recommended, connecting flange, with torsional rigidity
-Double universal, with torsional stiffness, self-centering gear teeth, high specific power, transitional elastic element for adjusting stiffness
-Compensate for axial displacement, radial displacement and angular displacement
-Complete sealing of the coupling through metal bellows
-Thanks to the good sealing structure, the lubricating oil replacement cycle is long (long maintenance-free cycle)
-The lubricating medium (lubricating oil) can be replaced without disassembly ··Self-lubricating (applicable to lubricating oil or grease)
Flexible Laminated Couplings (SRS)
-Dual gimbal for torsional and bending stiffness
-Compensation of axial, radial and angular displacement through flexible lamination assemblies
-No wear
-Optional insulation function
4、For hollow shaft drives
Flexible Laminated Couplings (SRS)
Gearbox hollow shaft coupling or traction motor hollow shaft coupling
-Dual gimbal for torsional and bending stiffness
-Compensation of axial, radial and angular displacement through flexible lamination assemblies
-Through the gearbox or motor, saving installation space
-No wear
-Optional insulation function
Duplex Coupling
Gear-Flexible Laminated Coupling (ZK-SRS)
Gearbox hollow shaft coupling or traction motor hollow shaft coupling
-Double universal, with torsional stiffness, bending stiffness and gear teeth self-centering, high specific power characteristics
-Compensate for radial displacement, axial displacement and angular displacement
-Compensation of large axial displacement by gear half coupling
-The use of flexible lamination couplings and gear half couplings integrated in the gearbox saves installation space
-Less maintenance
-Optional insulation function
II、Output coupling
1、for full suspension drives
Link Coupling (LK)
-Dual gimbal for torsional and bending stiffness
-Compensate for large radial displacement, axial displacement and angular displacement through connecting rods on both sides
-Suitable for high-power railway locomotives
Duplex Coupling
Gear-Flexible Laminated Link Coupling (ZK-SLK)
-Double gimbal, with torsional and bending stiffness, self-centering gear teeth
-Compensate for axial displacement, radial displacement and angular displacement
-Compensation of large axial displacement by gear half coupling
-Gearbox adopts hollow shaft design
-Adopt connecting rod type half coupling, saving installation space
-Less maintenance
Rubber wedge coupling (KPK)
-Dual gimbal for torsional and bending stiffness
-Compensate for radial displacement, axial displacement and angular displacement, compact lateral space
-Replacement of rubber wedges without dismantling the drive
2、for semi-suspension drives
Rubber wedge coupling (KPK)
-Single gimbal with torsional and bending stiffness
-Compensate for angular displacement and axial displacement, compact lateral space
-High radial stiffness
-Replacement of rubber wedges without dismantling the drive
III、Suitable for low-floor tram drives
1、Gear coupling
Gear Coupling (ZK)
-Grease lubrication
-Double universal, with torsional stiffness, self-centering gear teeth, high specific power characteristics
-Compensate for axial displacement, radial displacement and angular displacement
-Flange connection between gear coupling and gearbox hollow shaft
-Less maintenance
Gear Coupling (ZK)
Suitable for permanent magnet motor drives, grease lubricated
-Double universal, with torsional stiffness, self-centering gear teeth, high specific power characteristics.
-ompensate for axial displacement, radial displacement and angular displacement
-Quickly disconnect and disconnect from the motor during maintenance
- Less maintenance
2、Duplex Coupling
Duplex coupling: gear-rubber wedge coupling (ZK-KPK)
-Has the dual characteristics of ZK type coupling and KPK type coupling.
-Compensate for axial displacement, radial displacement and angular displacement
-Axial displacement is compensated by single-sided gear coupling
-Flange connection between gear coupling and gearbox hollow shaft
-Directly connected to the wheel (independent wheel drive)
Duplex coupling: gear-ring rubber wedge coupling (ZK-KPR)
·Have the dual characteristics of ZK type coupling and KPR type coupling
-Compensate for axial displacement, radial displacement and angular displacement
-Axial displacement is compensated by single-sided gear coupling
-The gear coupling integrated into the hollow shaft of the gearbox saves installation space
-Direct connection with the wheelset through the face teeth
-The annular rubber can be designed with radial separation
Duplex Coupling: Gear-Flexible Laminate Coupling (ZK-SRS)
-Have the dual characteristics of ZK type coupling and SRS type coupling.
-The gearbox adopts an integrated design to save space
- Directly connected to the wheel
-Axial displacement is compensated by single-sided gear coupling
-Less maintenance
3、Rubber wedge coupling
Rubber wedge coupling (KPK)
-Double gimbal, with torsional and bending stiffness
-Compensate for axial displacement, radial displacement and angular displacement
-Gearbox adopts hollow shaft design
-Directly connected to the wheel
-Connect with gear box through face teeth
4、Ring rubber wedge coupling
Ring Rubber Wedge Coupling (KPR)
-Double gimbal, with torsional and bending stiffness
-Compensate for axial displacement, radial displacement and angular displacement
-Gearbox adopts hollow shaft design
-Direct connection to wheels or axles
-The annular rubber can be designed with radial separation
5、Connecting rod coupling
Link Coupling (LK)
-Designed with "Dancing ring"
-Features torsional stiffness and bending stiffness, compact axial installation space
-Compensate for axial displacement, radial displacement and angular displacement
-Installed directly between the gearbox and the wheel
6、Cardan shaft gear couplings for master-slave gearbox drive systems
Universal shaft gear coupling (ZKGW)
-Double universal, with torsional stiffness, self-centering gear teeth, high specific power characteristics
-Compensate for axial displacement, radial displacement and angular displacement
-Self-lubricating (applicable to lubricating oil or grease)
IV、Suitable for monorail drives
Gear Coupling (ZK)
-Double universal, with torsional stiffness, self-centering gear teeth, high specific power characteristics
-Drive unit suitable for inclined and inclined arrangement
-Large axial displacement, radial displacement and angular displacement capability
-Complete sealing of the coupling through metal bellows
-Thanks to the good sealing structure, the lubricating oil replacement cycle is long (long maintenance-free cycle)
-The lubricating medium can be replaced without disassembly (applicable to lubricating oil)
-Self-lubricating (applicable to lubricating oil or grease)
-Optional sliding bushing realizes overload protection function
-Optional insulation function
Gear Coupling (ZK)
-Shaft-hub connection: double-sided flange connection
-Double universal, with torsional stiffness, self-centering gear teeth, high specific power characteristics.
-Compensate for axial displacement, radial displacement and angular displacement
-Special flange design
-Self-lubricating (applicable to lubricating oil or grease)
V、Universal shaft gear coupling
Universal shaft gear coupling (ZK)
-Double universal, with torsional stiffness, self-centering gear teeth, high specific power characteristics.
-Constant speed operation
-Small reaction force
-Optional connecting shafts of different lengths
-Complete sealing of the coupling through metal bellows
-Oil lubrication is preferred
-Long lubricating oil replacement cycle (long maintenance-free cycle)
-The lubricating medium can be replaced without disassembly (applicable to lubricating oil)
VI、Suitable for variable gauge drive systems
Duplex Coupling
-Gear-Link Coupling (ZK-LK)
-Suitable for track gauge adjustment of moving wheels
-Have the dual characteristics of ZK type coupling and LK type coupling
-Compensate for large axial displacement when passing through the gauge adjustment device
-Connect directly with wheel interference
-Self-lubricating (applicable grease)
Double coupling
-Gear-Flexible Laminated Link Coupling (ZK-SLK)
-Have the dual characteristics of ZK type coupling and SLK type coupling.
-Compensate for axial displacement, radial displacement and angular displacement
-Gear type half-coupling is directly connected with the gearbox to compensate for large axial displacement.
-Adopt connecting rod coupling structure, compact installation space
-Self-lubricating (applicable grease)
Gear Coupling (ZK)
-Suitable for trailer bogies
-Double universal, with torsional stiffness, self-centering gear teeth, high specific power characteristics.
-Compensate for radial displacement, axial displacement and angular displacement
-High axial compensation capability
-Self-lubricating (applicable grease)
VII、Elastic coupling
Elastic Couplings (VSK)
-Including roller bearings
-High elasticity, with vibration damping function, suitable for connecting cardan shafts ·
-Strong damping performance
-Integrated overload protection function
Elastic Couplings (VSK)
-With sliding bearing
-High elasticity, with vibration damping function, suitable for connecting cardan shafts