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Drive concepts
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There is no drive without propulsion. Thus we provide our customers with the best solutions to ensure that their products achieve the dynamic they need.
Drive concepts for standard vehicles
Fully suspended drive systems
Motor and gearbox are fully suspended.
GIH / GMH / GSH types
Pros:
- Low unsuspended masses: motor and gearbox mass not resting on the wheelset
- Drive not directly affected by shock loads from wheel-track contact
- No torque reaction forces from the drive onto the wheelset
- Short lateral construction length
- No speed limit
Cons:
- Head beam needed
- Complex and expensive drive system (normally a two-level gearbox is required for the center distance of the gearbox)
- Higher LCC (elastomers of couplings)
Motor:
Motor is bolted to the gearbox, motor and gearbox form a stiff drive structure
Gearbox:
Gearbox is bolted to the motor, motor
and gearbox form a stiff drive structure;
hollow output-shaft, includes main gear
Coupling (output):
Cardanic coupling (double joint) between output shaft of gearbox and wheelset shaft; coupling compensates the primary spring movements against the drive.
Drive:
Drive is fully supported by 3 suspension elements
GIH 2
GMH 2
GSH 2
GMH 1
Semi-suspended drive systems
Motor and gearbox are partly suspended.
GIK / GMK / GSK types
Pros:
- No head beam needed
- Simple bogie design (no distortion of middle beam)
- Short lateral construction length
Cons:
- High unsuspended masses: approx. 50% of the drive mass is resting on the wheelset
- Drive is affected by shock loads from wheel-track contact (minor damping)
- Torque reaction forces from the drive are loading the wheelset
- Complex drive system (normally a two-level gearbox is required for the center distance of the gearbox)
- Higher LCC (elastomers of couplings)
- Speed limit 160 km/h
Motor:
Motor is bolted to the gearbox, motor and gearbox form a stiff drive structure
Gearbox:
Gearbox is bolted to the motor, motor and gearbox form a stiff drive structure; hollow output-shaft, includes main gear
Coupling (output):
Cardanic coupling (single joint) between output shaft of gearbox and wheelset shaft; coupling compensates the angular movements of the wheelset against the drive; high radial stiffness of the coupling, minor damping
Drive:
Drive is supported by 2 suspension elements on the bogie frame; The third supporting point is the output coupling, the drive is ‘riding’ on the wheelset
GIK 2
GMK 2
GSK 2
Partly suspended drive systems – standard
Motor is fully suspended. Gearbox is partly suspended.
GKD / GHD types
Pros:
- No head beam needed
- Motor is not affected by shock loads from wheel-track contact
- Motor and gearbox can be handled individually
- Low LCC
- No speed limit
Cons:
- Complex bogie design
(distortion of middle beam by motor forces) - Unsuspended masses: approx. 66% of the gearbox mass is resting on the wheelset
- Gearbox is affected by shock loads from wheel-track contact (no damping)
- Torque reaction forces from the drive are loading the wheelset
- High lateral length (motor-coupling-gearbox), lower performance at given construction length
Motor:
Motor can be handled individually
Gearbox:
Gearbox can be handled individually; main gear is directly mounted on the wheelset shaft
Coupling (output):
No output coupling installed, main gear is directly mounted on the wheelset shaft
Drive:
Motor is supported by 3 (or 4) suspension points, typically on the middle beam; gearbox is supported by 2 rolling bearings on the wheelset shaft and by a pendulum support (optionally with a C-bracket) on the middle beam.
GKD 1
GKD 2
GHD 1
with hollow motor
GHD 1
with hollow pinion
Partly suspended drive system – wagon wheel
Motor is almost fully suspended. Gearbox is partly suspended. GKD 1 – wagon wheel type
Pros:
- Motor is not affected by shock loads from wheel-track contact
- Motor and gearbox can be handled individually
- Low LCC
- Shorter lateral construction length (motor-coupling-gearbox) than partly suspended standard drive
Cons:
- Low unsuspended masses: approx. 66% of the gearbox and 25% of the motor mass are resting on the wheelset
- Gearbox is affected by shock loads from wheel-track contact (no damping)
- Torque reaction forces from the drive load onto the wheelset
- Speed limit
Motor:
Motor and gearbox do not form a stiff structure, complex system
Gearbox:
Motor and gearbox do not form a stiff structure, complex system. Main gear is directly mounted on the wheelset shaft
Coupling (output):
No output coupling is installed, main gear is directly mounted on the wheelset shaft.
Drive:
Motor is supported by a suspension point on the side beam and by several suspension points on the gearbox.
Gearbox is supported by 2 rolling bearings on the wheelset shaft and by a pendulum support on the middle beam.
Partly suspended drive system – head beam
Motor is fully suspended. Gearbox is partly suspended. GKD 2 type
Pros:
- Motor is not affected by shock loads from wheel-track contact
- Motor and gearbox can be handled individually
- Low LCC
- No speed limit
- No torque load on middle beam
Cons:
- Low unsuspended masses: approx. 66% of the gearbox mass is resting on the wheelset
- Gearbox is affected by shock loads from wheel-track contact (minor damping)
- Torque reaction forces from the drive load onto the wheelset
- High lateral construction length (motor-coupling-gearbox), lower performance at given construction length
- Head beam needed
Motor:
Motor and gearbox do not form a stiff structure, complex system
Gearbox:
Motor and gearbox do not form a stiff structure, complex system; main gear is directly mounted on the wheelset shaft
Coupling (output):
No output coupling needed, main gear is directly mounted on the wheelset shaft
Drive:
Motor is supported by 2 suspension points on the middle beam and by 1 suspension point on the head beam.
Gearbox is supported by 2 rolling bearings on the wheelset shaft and by a pendulum support on the middle beam.
Nose-suspended drive systems
Motor and gearbox are (almost) not suspended.
GFT / GMT / GST types
Pros:
- No head beam needed (simple bogie design)
- No distortion of middle beam
- Simple and cost-effective drive design
- Low LCC
Cons:
- Highest unsuspended masses: approx. 66% of the drive mass is resting on the wheelset
- Drive is affected by shock loads from wheel-track contact (no damping)
- Torque reaction forces from the drive load onto the wheelset
- Motor and gearbox cannot be handled individually
- Speed limit 140-160 km/h
Motor:
Motor is bolted to the cannon tube and the gearbox housing, motor and gearbox form a stiff drive structure
Gearbox:
Gearbox is bolted to the motor and cannon tube, motor and gearbox form a stiff drive structure; main gear is directly mounted on the wheelset shaft
Cannon tube:
Comprises the suspension bearings
Drive:
Drive is supported by 1 suspension element on the middle beam. The second and third suspension points are the suspension bearings in the cannon tube.
GFT 1
with hub pinion
GFT 1
with plug-in pinion
GMT 1
GST 1
Drive concepts for 100% low-floor vehicles
Transverse, single-axle, fully suspended drive system
Motor and gearbox are fully suspended.
GFT 6 type
Motor:
Motor is bolted to the gearbox, motor and gearbox form a stiff drive structure
Spur Gearbox:
Gearbox is bolted to the motor, motor and gearbox form a stiff drive structure; hollow output-shaft, includes main gear
Coupling (output):
Cardanic coupling (double joint) between output shaft of gearbox and wheelset shaft; coupling compensates the primary spring movements against the drive
Drive:
Drive is fully supported by 3 suspension elements on the bogie frame.
Transverse, single-axle, partly suspended drive system
Motor is fully suspended. Gearbox is partly suspended.
GKD 2 type
Motor:
Two Motors are bolted to each other and form a stiff structure; motor is supported by 3 (or 4) suspension points on the bogie frame.
Spur Gearbox:
Gearbox can be handled individually; single-stage or two-stage spur gearbox; main gear is directly mounted on the wheelset shaft; gearbox is supported by 2 rolling bearings on the wheelset shaft and by one pendulum support on the middle beam.
Coupling (output):
Cardanic coupling (double joint) between input shaft of gearbox and motor shaft; coupling compensates both axial and radial angular movements of the motor against the gearbox.
Transverse, single-wheel, fully suspended drive system (1)
Motor and gearbox are fully suspended.
GMH 2 type
Motor:
Motor is bolted to the gearbox, motor and gearbox form a stiff drive structure; one motor drives two wheels
Spur Gearbox:
Gearbox is bolted to the motor, motor and gearbox form a stiff drive structure; two-stage spur gearbox; hollow output-shaft, includes main gear
Coupling (output):
Cardanic coupling (double joint) between output shaft of gearbox and wheelset shaft; coupling compensates the primary spring movements against the drive.
Drive:
Drive is fully supported by 3 suspension elements.
Transverse, single-wheel, fully suspended drive system (2)
Motor is (almost) fully suspended.
Motor:
Motor housing is part of the bogie structure.
Spur Gearbox:
No gearbox installed; optionally with planetary or bevel gearbox
Coupling (output):
Cardanic coupling (double joint) between output shaft of gearbox and wheelset shaft; Coupling compensates the primary spring movements against the drive.
Drive:
Wheelset shaft is supported by 2 reaction rods on the middle beam.
Transverse, single-wheel, nose-suspended drive system (1)
Motor and gearbox are (almost) not suspended.
GMD 2 type
Motor:
Motor is bolted to the gearbox, motor and gearbox form a stiff drive structure
Spur Gearbox: (left/right)
Gearbox is bolted to the motor, motor and gearbox form a stiff drive structure; two-stage spur gearbox; main gear is mounted directly on the wheelset shaft
Drive:
Drive is supported by a pendulum support on the bogie frame. The drive structure is part of the bogie frame (swing arm). Gearbox bearing works as wheelset bearing.
Transverse, single-wheel, nose-suspended drive system (2)
Motor and gearbox are nose-suspended.
GFT 6/1 type
Motor:
One motor drives two wheels; motor can be handled individually; motor is bolted to one gearbox, motor and gearbox form a stiff structure
Spur Gearbox: (left/right)
Split of torque to left and right spur gearbox. The drive structure is part of the bogie frame, the gearbox bearings work as wheelset bearings; two-stage spur gearbox.
Coupling (output):
Cardanic shaft between left and right gearbox
Transverse, single-wheel, nose-suspended drive system (3)
Motor is (almost) not suspended
Motor:
Motor with external rotor;
Driving wheel is connected to the external rotor, rubber elements between rotor and wheel rim; motor axle is connected to the swing arms of the bogie, the motor bearings work as wheelset bearings;
Gearbox:
No gearbox installed
Longitudinal, single-axle, fully suspended drive system
Motor and gearbox are fully suspended.
GMH 5 type
Motor:
Motor is bolted to the gearbox, motor and gearbox form a stiff drive structure
Bevel Gearbox:
Gearbox is bolted to the motor, motor and gearbox form a stiff drive structure; two-stage gearbox (bevel-spur), optional spur-bevel or single-stage bevel gearbox; hollow output-shaft, includes main gear
Coupling (output):
Cardanic coupling (double joint) between output shaft of gearbox and wheelset shaft; coupling compensates the primary spring movements against the drive.
Drive:
Drive is supported by 3 suspension elements on the bogie frame.
Longitudinal, single-axle, partly suspended drive system (1)
Motor is fully suspended. Gearbox is partly suspended.
GKD 5 type
Motor:
Motor can be handled individually; optionally with attached reduction gearbox; Motor is supported by 3 (or 4) suspension points on the bogie frame or the vehicle frame.
Bevel Gearbox:
Gearbox can be handled individually; two-stage reduction gearbox (bevel-spur), optional spur-bevel or single reduction bevel gearbox. Main gear is directly mounted on the wheelset shaft; Gearbox is supported by 2 rolling bearings on the wheelset shaft and by a pendulum support on the bogie frame.
Coupling (Input):
Cardanic coupling (double joint) between input shaft of gearbox and motor shaft; coupling compensates axial, radial and angular movements of the motor against the gearbox.
Longitudinal, single-axle, partly suspended drive system (2)
Motor is fully suspended. Gearbox is partly suspended.
GKD 5 type
Motor:
Two motors are bolted to each other and form a stiff drive structure. Motor is supported by 3 (or 4) suspension points on the bogie frame; optionally with attached reduction gearbox.
Bevel Gearbox:
Gearbox can be handled individually; two-stage reduction gearbox (bevel-spur), optional spur-bevel or single reduction bevel gearbox; Main gear is directly mounted on the wheelset shaft. Gearbox is supported by 2 rolling bearings on the wheelset shaft and by a pendulum support on the bogie frame.
Coupling (Input):
Cardanic coupling (double joint) between input shaft of gearbox and motor shaft; Coupling compensates angular, axial and radial movements of the motor against the gearbox
Longitudinal, single-axle, partly suspended drive system (3)
Motor is fully suspended. Gearbox is partly suspended.
GKD 5 type
Motor:
Motor can be handled individually; Motor is supported by 3 (or 4) suspension points on the bogie frame
Bevel Gearbox:
Gearbox can be handled individually; two-stage reduction
gearbox (bevel-spur), optional spur-bevel or single reduction
bevel gearbox; Main gear is directly mounted on the wheelset shaft; Gearbox is supported by 2 rolling bearings on the wheelset shaft and by a pendulum support on the bogie frame.
Coupling (input):
Cardanic coupling (double joint) between input shaft of gearbox and motor shaft; Coupling compensates axial, radial and angular movements of the motor against the gearbox.
Longitudinal, single-wheel, fully suspended drive system (1)
Motor and gearbox are fully suspended.
GSH 5 type
Motor:
Motor is bolted to the gearbox, motor and gearbox form a stiff drive structure.
Bevel Gearbox: (left/right)
Gearbox is bolted to the motor, motor and gearbox form a stiff drive structure; two-stage reduction spur gearbox; hollow output-shaft, includes main gear.
Coupling (output):
Cardanic coupling (double joint) between output shaft of gearbox and wheelset shaft; coupling compensates the primary spring movements against the drive.
Drive:
Drive is fully supported by 4 suspension elements on the
bogie frame.
Longitudinal, single-wheel, fully suspended drive system (2)
Motor and gearbox are fully suspended.
GSH 4 or GMH 5 type
Motor:
Motor is bolted to the gearbox, motor and gearbox form a stiff drive structure; one motor powers two driving wheels.
Bevel Gearbox: (left/right)
Gearbox is bolted to the motor, motor and gearbox form a stiff drive structure; single-stage bevel gearbox; hollow output-shaft, includes main gear
Coupling (output):
Cardanic coupling (double joint) between output shaft of gearbox and wheelset shaft; coupling compensates the primary spring movements against the drive.
Drive:
Drive is fully supported by 3 suspension elements on
the bogie frame.
Longitudinal, single-wheel, fully suspended drive system (3)
Motor and gearbox are fully suspended.
GMH 4 type
Motor:
Motor is bolted to the gearbox, motor and gearbox form a stiff drive structure
Bevel Gearbox:
Gearbox is bolted to the motor, motor and gearbox form a stiff drive structure; main gear directly mounted on the wheelset shaft.
Coupling (output):
Cardanic coupling (double joint) between output shaft of gearbox and wheelset shaft; coupling compensates the primary spring movements against the drive.
Drive:
Drive is fully supported by 3 suspension elements on the bogie frame.
Longitudinal, single-wheel, partly suspended drive system (1)
Motor is fully suspended. Gearbox is partly suspended.
GKD 4/2 type
Motor:
Motor is supported individually on vehicle frame; one motor drives two wheels
Coupling (input):
Cardanic shaft between motor and bevel gearbox
Bevel Gearbox:
Bevel gear level on input side; Split of torque to left and right spur gearbox; Gearbox is bolted to spur gearbox
Coupling (torque split):
Cardanic shaft between left and right gearbox
Spur Gearbox: (left/right)
Two-stage spur gearbox; main gear is mounted directly on the wheelset shaft; drive is supported by a pendulum support on the bogie frame.
Longitudinal, single-wheel, partly suspended drive system (2)
Motor and gearbox are partly suspended.
GKD 5/3 type
Motor:
One motor drives two wheels; motor is supported on bogie frame and gearbox
Coupling (input):
Cardanic coupling (double joint) between input shaft of gearbox and motor shaft; coupling compensates angular movements of the motor against the gearbox.
Bevel Gearbox:
Bevel gear level on input side; Split of torque to left and right spur gearbox; Gearbox is incorporated in one spur gearbox
Coupling (torque split):
Cardanic shaft between left and right gearbox
Spur Gearbox: (left/right)
Single reduction spur gearbox with intermediate gear; Main gear is mounted directly on the wheelset shaft; Drive is supported by a pendulum support on the bogie frame.
Longitudinal, single-wheel, partly suspended drive system (3)
Motor is fully suspended. Gearbox is partly suspended.
GKD 4/1 type
Motor:
One motor drives two wheels; motor is supported individually on bogie frame
Coupling (input):
Cardanic shaft between motor and bevel gearbox
Bevel Gearbox:
Bevel gear level on input side; Split of torque to left and right spur gearbox; Gearbox is incorporated in one spur gearbox.
Coupling (torque split):
Cardanic shaft between left and right gearbox
Spur Gearbox: (left/right)
Two-stage spur gearbox; The drive structure is part of the bogie frame (swing arm), the gearbox bearings work as wheelset bearings.
Longitudinal, single-wheel, nose-suspended drive system
Motor and gearbox are (almost) not suspended.
GMD 5 type
Motor:
Motor is bolted to the gearbox, motor and gearbox form a stiff drive structure
Bevel Gearbox: (left/right)
Gearbox is bolted to the motor, motor and gearbox form a stiff drive structure; two-stage gearbox (spur-bevel); Main
gear is mounted directly on the wheelset shaft
Coupling (output):
No coupling needed, main gear is directly mounted on the wheelset shaft
Drive:
Drive is supported by a pendulum support sided on the bogie frame; Drive is supported gearbox sided by 2 rolling bearings on the wheelset shaft.