CA1213470A - Drive for electric rail traction vehicles - Google Patents
Drive for electric rail traction vehiclesInfo
- Publication number
- CA1213470A CA1213470A CA000415049A CA415049A CA1213470A CA 1213470 A CA1213470 A CA 1213470A CA 000415049 A CA000415049 A CA 000415049A CA 415049 A CA415049 A CA 415049A CA 1213470 A CA1213470 A CA 1213470A
- Authority
- CA
- Canada
- Prior art keywords
- motor
- shaft
- pinion
- drive
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
- H02K7/1163—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Automatic Cycles, And Cycles In General (AREA)
- Control Of Electric Motors In General (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Machines For Laying And Maintaining Railways (AREA)
- Escalators And Moving Walkways (AREA)
Abstract
ABSTRACT
A drive for an electric rail traction vehicle including a motive rotatable driving rail wheel supported on an axle with a driven bull gear secured to drive the rail wheel, a pinion gear in driving mesh with the bull gear, a driving electric motor with a unitary housing having parts rigidly interconnected for the gears and motor with the motor having a central hollow shaft supporting a rotor and the pinion gear having a driving pinion shaft extending into the hollow center of the motor shaft and connected thereto with the motor shaft to drive the pinion shaft and the motor shaft and pinion shaft being coaxial with each other centered by a bushing and bearing supporting the pinion shaft.
A drive for an electric rail traction vehicle including a motive rotatable driving rail wheel supported on an axle with a driven bull gear secured to drive the rail wheel, a pinion gear in driving mesh with the bull gear, a driving electric motor with a unitary housing having parts rigidly interconnected for the gears and motor with the motor having a central hollow shaft supporting a rotor and the pinion gear having a driving pinion shaft extending into the hollow center of the motor shaft and connected thereto with the motor shaft to drive the pinion shaft and the motor shaft and pinion shaft being coaxial with each other centered by a bushing and bearing supporting the pinion shaft.
Description
., , lo SPECIFICATION
The invention relates to a drive for electric rail traction vehicles which includes a traction motor driving a drive shaft, which through a pinion drives a large toothed bull gear connected to the driving rail wheel.
Drives heretofore have used various mechanisms including such as that shown in German LO 25 14 265 in which ' a traction drive motor is included positioned between two driving axles driven by an angular gear. A coupling allowing longitudinal displacements is disposed between at least one of the angular gears, and the rotor of the traction motor with the coupling requiring a bearing and the angular gear requiring two bearings.
It is an object of the present invention to provide a drive for electric rail traction vehicles which overcomes disadvantages in structures heretofore used such as that referred Jo above, and which makes it possible to drive the axles of an electric rail traction vehicle by means of single motors or the halves of a double motor through reduction of the number of pinion shaft bearings and obtaining a short overall structural length of the motor and gearing lit A further object of the invention is to provide a drive for electric rail vehicles wherein a coupling is included between the drive motor and the Pinion shaft which allows longitudinal or axial displacements without damage to the pinion due to axial displacements of shafts during operation.
A feature of the invention which obtains the foregoing objectives to attained by providing a drive motor which is constructed to have a hollow shaft which supports .. . . . . ...
~23L3~7~;13 the rotor of the drive motor and providing a pinion shaft which is located within and coaxial with the hollow motor shaft Because of this construction, a long pinion shaft can be provided which can guide and support the motor shaft at the side of the pinion so that only two radial bearings are provided for the drive motor and the axle gearing unit Thus, the number of bearings required is as low as possible, and even with double motors a short structural length is achieved, and this also makes it possible to reduce the axle base of the bogies.
As a feature of the invention, the motor shaft which is hollow includes a guide bushing for the pinion shaft.
With this arrangement, the guidance of the motor shaft and the pinion shaft together behave like a statically unitary supported overall system. By the selection of a suitable material, for example, My, the formation of rust is avoided despite the fact that little relative movement will occur between the guide bushing and the pinion shaft.
It is a further feature of the invention that the motor shaft is hollow and the pinion shaft which extends therein are interconnected to each other in driving relationship with a friction type lock, such as by a releasable clamping ring to thus form a motor shaft pinion shaft which are essentially a unitary structure in operation. By means of employing a releasable connection, an easy and simple disassembly of the motor and gearing arrangement is obtained, and disassembly is accomplished by releasing the clamping ring with subsequent extraction of the pinion shaft from the hollow shaft. Thus, despite the compact design of the motor shaft and pinion shut unit an . .
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easy and simple replacement of both and of the motor as jell as the axle gearing is possible.
A further feature is the construction where the friction type lock is disposed at the side of the traction motor opposite the pinion. In this construction, a pinion shaft of the longest possible length without requiring further length of the structure is obtained.
It is a further feature of the invention that the pinion shaft and motor shalt, which is hollow, are connected to one another through a coupling. This solution is utilized in a form of the invention when the pinion shaft does not extend fully through the hollow shaft over its entire length, but extends only through a portion of a recessed or hollowed-out suction of the motor shaft. This variation in structure is somewhat longer than the arrangement with a pinion shaft which extends through the full length of the hollow motor shaft, but has the advantage that torsional elasticity can be achieved through the coupling.
It is a further feature of the invention that the motor shaft and pinion shaft unitary arrangement is constructed so that the pinion is locate in the axle gear housing Thus, the arrangement of the short structure is attained having a pinion shaft that provides a substantial spacing for the bearings.
A further feature of the invention is the possibility of providing a traction motor which is designed as a double motor. With a double motor, it is possible to simu7.ataneously drive two driving axles emanating from one motor housing. This makes possible the elimination of a coupling for allowing longitudinal displacements, and the -overall structural length can be shortened.
A further feature of the invention is that the drive provides a thrust bearing such as a two row shoulder bearing for the axial adjustment of the motor pinion shaft unit.
This results from the disposition of the thrust bearing at the pinion so that an expansion of the motor shaft and pinion shaft unit due to heating during operation does not change the adjustment of the pinion. The expansion that results extends from the pinion bearing in the direction of the other radial bearing which allows expansion and contraction of the pinion shaft. As a result of the foregoing construction, a coupling between the motor and the axle gearing can be eliminated thereby eliminating the negative consequences which occur with the addition of such coupling. The correct position of the pinion relative to drive gear as wow as the provision of a bearing which is free from the tension or stresses which are induced by expansion and contraction, is guaranteed.
A further feature of the invention is that the traction motor axle and drive axle are positioned parallel to each other. In other form, the axle gearing it designed as a herringbone gearing with the tenth arranged so that no axial thrust or stress is transferred to the drive shaft or driven shaft. As a result of the parallel relationship in shafts, the possibility is created fox special use in cases of providing a motor disposition parallel to the driving axle with the aforementioned elimination of the couplings and with the provision of only two bearings. With the herringbone gearing, good assembly and dismantling possibilities derive. In this arrangement, the motor pinion shaft is supported and seated as determined by static I
limitations, and operational factors do not induce unforeseen stresses and problems An advantage of the arrangement is that the control and guidance of the axle for the drive wheel occurs automatically a a result of the herringbone gearing so that a thrust bearing can be eliminated. In viewing the structure from the center of the herringbone gearing, the motor shaft and pinion shaft can freely expand when heated so that no axial forces occur to adversely affect the inter meshing toothed driving relationship.
Other objects, advantages and features will become more apparent with the additional teachings of the principles of the invention in the following description of the preferred embodiments in the specification, drawings and claims, in which:
Figure 1 is a sectional view taken through a drive unit along the axis of the pinion shaft ox a structure constructed and operating in accordance with the principles of the present invention;
Figure 2 it a vertical sectional view of another form of the invention taken along the axis of the pinion drive shaft; and Figure 3 is a sectional view taken along the axis ox the drive shaft of another form of the invention As illustrated in Figure 1, the structure shown can be constructed as the housing of a moo or single drive, but it can also be constructed as halt of a bimotor drive in a monoblock structure as is, for example, well suited for short haul tray f to .
In the case of a bimotor drive in a monoblock structure support is not required since two sides of the 3~7~
monoblock are held by the axle gearings Otherwise, a support of the motor housing occurs in the center of gravity of the axle gearing and motor unit, that is, at the axle gearing at the side of the traction motor.
In the structure shown the drywall motor is shown to the right of the figure, and the driving rail wheel and its driving gear are shown to the left, all enclosed in a rigid housing of parts suitably interconnected. These housing parts may be secured to each other in various suitable ways which need not be described in detail, but will be apparent to those versed in the art from the description of the overall structure. The enclosure includes a housing 1 for the driving electric motor which includes a stators winding 2 mounted within the housing, and a rotor winding 3 which is rotatable carried in the housing. The rotor winding 3 is coccal mounted on a hollow shaft 4. Extending coccal within the hollow shaft 4 is a pinion shaft 5. The pinion shaft 5 is drivingly and releasable connected to the motor hollow shaft 4 by a friction type lock with a releasable clamping ring such as including a bi-conical ring 12, which is a preferred form, although other forms of releasable driving connections between the shafts 4 and 5 may be adopted.
The pinion shaft 5 is supported radially for rotation in radial bearings it and 7 which are suitably carried on the overall housing, which housing includes the motor housing 1 and the gear housing 17. Also included within the structure it a thrust bearing 8 which supports the pinion shaft 5 and which is located between the motor and a pinion gear 14 on the shaft so that essentially all of the driving portion of the shaft 5 is between the thrust I
bearing 8 and the connection of the shaft 5 to the hollow motor shaft 4. The connection 12 which drivingly interconnects the motor shaft 4 and the gear shaft Jo it constructed so that relative axial movement can be countenanced between the hollow motor shaft 4 an the drive shaft 5 and therefore no internally induced axial stresses will be transmitted to the thrust bearing 8 so that this contributes to retaining the alignment between the drive pinion 14 and the driven bull gear 15.
The hollow shaft 4 of the motor 1, and the elements carried thereon are not seated in ball bearings, but rather are supported on the pinion shaft 5 held on a bushing 9 positioned between the pinion shaft 5 and the hollow shaft 4 on the left side of the motor, as shown in the drawing, which is the opposite end of the motor from the location of the drive connection 12. The bushing positively carries the hollow shaft 4, but accommodates relative limited axial movement such as might occur with changes in length due to temperature variation. The other end of the hollow shaft 4, opposite the bushing is axial supported by the drive connection 12.
The bearings 6 an 7 which radially support the pinion shaft 5 are sealed and protected by a labyrinth seal 13, protecting the bearing 6 and by flanged seal 11, protecting the radial bearing 7 and the thrust bearing 8.
The hollow motor shaft 4 alto carries a fan 18 which ventilates the interior of the housing 1 through end openings aye and 18b in the housing for cooling the motor.
A driving axle 16 is secured to the driving rail wheel and carries a bull gear 15 driven by the pinion 14.
Pro the purpose of accepting the pinion bearing 7, the axle , . . , . . .
I
gearing housing 17 has an annular extension or neck portion 19 which is flanged so as to be secured to the motor housing 1 by suitable means. The drive unit thus is compact and retains adjuster with the pinion 14 maintaining its proper axial position relative to the bull gear 15 as determined by the radial support bearing 7 and the thrust bearing 8, which are locked in positive adjustment at the time the mechanism is assembled. The pinion shaft 5 is of considerable length to permit torsional and radial elasticity due to drive stresses and due to changes in dimension with thermal changes, and the drive power for the mechanism is positively delivered from the electric motor rotor through the gearing to the driving rail wheel with a compact construction.
In the arrangement of Figure 2, another torsionally elastic arrangement is provided with further torsional elasticity introduced, and this construction provides a slightly longer structure than the arrangement of Figure 1, but employs similar principles in utilizing a motor shalt which can be fully hollow but need only be only be partially hollow. The motor shaft I is supported in radial bearings 21 and 23 which are supported in a motor housing 1'. The motor includes a stators 2' within the housing and a rotor 3' which is carried directly on the shaft 20 as is a ventilating fan 18l. The motor shalt 20 has a hollow or bored portion into which an end Z3 of the pinion shaft 5' is inserted. The end 23 is guided or centered with a bushing 22 between the interior of the motor shaft 20 anal the extension 23.
The rotational drive between the motor and the pinion shaft 5' is accomplished by a torsionally elastic connection 24 providing a driving coupling. the torsionally ~3~7~
elastic connection, or coupling 24, is suitably connected such as by splints shown diagrammatically by the dotted lines to the motor shaft 20 and Jo the pinion shaft 5'0 A bull gear 29 is ion driving mesh with the pinion 31 on the pinion shaft 5 , and the bull gear 29 it carried on a rail wheel axle 16'. The bull gear I and the drive pinion 31 are carried in the axle gearing housing 35 which has a flange-like neck extension 33 to connect to the motor housing 1'. The neck 33 is of sufficient length to accommodate the elastic coupling 24. A bearing flange 30 holds a thrust bearing 32 and a radial bearing 27 which are assembled by being inserted into the housing neck 33, and these bearings radially and axially position the pinion shaft 5 maintaining the pinion 31 in proper mesh with the bull gear 29. The coupling 24 is connected to the pinion shaft by splints as above described or by means of a screwed-on bushing 25. this arrangement can be designed as both a jingle motor drive having a support in the center of gravity or as a bimotor arrangement in monoblock structure.
In the arrangement of Figure 3, a herringbone gear drive is utilized Driving rail wheels 60 and 61 are shown mounted on an axle 16", A pinion shaft 44 extends through a hollow shaft 43 which supports the rotor winding 42 of the motor with a ventilating fan 480 The motor is enclosed by a housing 40 which surrounds the twitter winding 41. A right hand end bearing 28" at the end opposite a pinion 52 is supported in the housing. A labyrinth seal having part I and 46 protects the bearing from the motor. A labyrinth seal I at the other end of the pinion shaft protects a bearing 50 which supports the pinion end of the pinion shaft 44. the I
bearing 28i' and 50 are radial bearings, and the need for an axial thrust bearing is eliminated by the use of the herringbone pinion and herringbone bull gears 53 which have teeth cut in opposite directions to eliminate axial thrust.
A guide bushing 47 is provided at the pinion end of the pinion shaft 44 supporting and centering the hollow shaft 43 of the motor. The other end of the pinion shaft supports the hollow motor shaft 43 at the location of a releasable bi-conical ring drive 12". The drive acts as a clutch and may take various forms, but is shown as a bit conical arrangement with a center hub that has sloping shoulders and outer rings which clamp to the shoulders when pressed together. The outer rings are connected to an end ring mounted on the shaft so that when the outer rings are pressed together, the shaft 44 will be drivingly connected to the hollow shaft 43. Spreading of the rings will release the two shafts. The arrangement transmits rotary driving torque from the motor hollow shaft 43 to the pinion shaft 44 at the right end providing a pinion shaft of substantial length to accommodate operational factors such as drive torsion, misalignment, vibration and temperature changes.
The pinion shaft 44 is seated coccal and statically in the bearings 28" and 50" at its ends. The arrangement of the coaxial parallel nested shafts is particularly well suited for driving axles with three phase motors. Within the framework of the concepts of the invention, other traction motors can be employed. The advantages of low structural size and a low number of bearings is accomplished through both arrangements.
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Thus it will be seen that we have provided an improved drive for an electrical rail traction vehicle which achieves the advantages and objectives above set forth, and applicants wish to cover all equivalent structures and embodiments embraced within the concepts of the foregoing described invention.
-lo-
The invention relates to a drive for electric rail traction vehicles which includes a traction motor driving a drive shaft, which through a pinion drives a large toothed bull gear connected to the driving rail wheel.
Drives heretofore have used various mechanisms including such as that shown in German LO 25 14 265 in which ' a traction drive motor is included positioned between two driving axles driven by an angular gear. A coupling allowing longitudinal displacements is disposed between at least one of the angular gears, and the rotor of the traction motor with the coupling requiring a bearing and the angular gear requiring two bearings.
It is an object of the present invention to provide a drive for electric rail traction vehicles which overcomes disadvantages in structures heretofore used such as that referred Jo above, and which makes it possible to drive the axles of an electric rail traction vehicle by means of single motors or the halves of a double motor through reduction of the number of pinion shaft bearings and obtaining a short overall structural length of the motor and gearing lit A further object of the invention is to provide a drive for electric rail vehicles wherein a coupling is included between the drive motor and the Pinion shaft which allows longitudinal or axial displacements without damage to the pinion due to axial displacements of shafts during operation.
A feature of the invention which obtains the foregoing objectives to attained by providing a drive motor which is constructed to have a hollow shaft which supports .. . . . . ...
~23L3~7~;13 the rotor of the drive motor and providing a pinion shaft which is located within and coaxial with the hollow motor shaft Because of this construction, a long pinion shaft can be provided which can guide and support the motor shaft at the side of the pinion so that only two radial bearings are provided for the drive motor and the axle gearing unit Thus, the number of bearings required is as low as possible, and even with double motors a short structural length is achieved, and this also makes it possible to reduce the axle base of the bogies.
As a feature of the invention, the motor shaft which is hollow includes a guide bushing for the pinion shaft.
With this arrangement, the guidance of the motor shaft and the pinion shaft together behave like a statically unitary supported overall system. By the selection of a suitable material, for example, My, the formation of rust is avoided despite the fact that little relative movement will occur between the guide bushing and the pinion shaft.
It is a further feature of the invention that the motor shaft is hollow and the pinion shaft which extends therein are interconnected to each other in driving relationship with a friction type lock, such as by a releasable clamping ring to thus form a motor shaft pinion shaft which are essentially a unitary structure in operation. By means of employing a releasable connection, an easy and simple disassembly of the motor and gearing arrangement is obtained, and disassembly is accomplished by releasing the clamping ring with subsequent extraction of the pinion shaft from the hollow shaft. Thus, despite the compact design of the motor shaft and pinion shut unit an . .
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easy and simple replacement of both and of the motor as jell as the axle gearing is possible.
A further feature is the construction where the friction type lock is disposed at the side of the traction motor opposite the pinion. In this construction, a pinion shaft of the longest possible length without requiring further length of the structure is obtained.
It is a further feature of the invention that the pinion shaft and motor shalt, which is hollow, are connected to one another through a coupling. This solution is utilized in a form of the invention when the pinion shaft does not extend fully through the hollow shaft over its entire length, but extends only through a portion of a recessed or hollowed-out suction of the motor shaft. This variation in structure is somewhat longer than the arrangement with a pinion shaft which extends through the full length of the hollow motor shaft, but has the advantage that torsional elasticity can be achieved through the coupling.
It is a further feature of the invention that the motor shaft and pinion shaft unitary arrangement is constructed so that the pinion is locate in the axle gear housing Thus, the arrangement of the short structure is attained having a pinion shaft that provides a substantial spacing for the bearings.
A further feature of the invention is the possibility of providing a traction motor which is designed as a double motor. With a double motor, it is possible to simu7.ataneously drive two driving axles emanating from one motor housing. This makes possible the elimination of a coupling for allowing longitudinal displacements, and the -overall structural length can be shortened.
A further feature of the invention is that the drive provides a thrust bearing such as a two row shoulder bearing for the axial adjustment of the motor pinion shaft unit.
This results from the disposition of the thrust bearing at the pinion so that an expansion of the motor shaft and pinion shaft unit due to heating during operation does not change the adjustment of the pinion. The expansion that results extends from the pinion bearing in the direction of the other radial bearing which allows expansion and contraction of the pinion shaft. As a result of the foregoing construction, a coupling between the motor and the axle gearing can be eliminated thereby eliminating the negative consequences which occur with the addition of such coupling. The correct position of the pinion relative to drive gear as wow as the provision of a bearing which is free from the tension or stresses which are induced by expansion and contraction, is guaranteed.
A further feature of the invention is that the traction motor axle and drive axle are positioned parallel to each other. In other form, the axle gearing it designed as a herringbone gearing with the tenth arranged so that no axial thrust or stress is transferred to the drive shaft or driven shaft. As a result of the parallel relationship in shafts, the possibility is created fox special use in cases of providing a motor disposition parallel to the driving axle with the aforementioned elimination of the couplings and with the provision of only two bearings. With the herringbone gearing, good assembly and dismantling possibilities derive. In this arrangement, the motor pinion shaft is supported and seated as determined by static I
limitations, and operational factors do not induce unforeseen stresses and problems An advantage of the arrangement is that the control and guidance of the axle for the drive wheel occurs automatically a a result of the herringbone gearing so that a thrust bearing can be eliminated. In viewing the structure from the center of the herringbone gearing, the motor shaft and pinion shaft can freely expand when heated so that no axial forces occur to adversely affect the inter meshing toothed driving relationship.
Other objects, advantages and features will become more apparent with the additional teachings of the principles of the invention in the following description of the preferred embodiments in the specification, drawings and claims, in which:
Figure 1 is a sectional view taken through a drive unit along the axis of the pinion shaft ox a structure constructed and operating in accordance with the principles of the present invention;
Figure 2 it a vertical sectional view of another form of the invention taken along the axis of the pinion drive shaft; and Figure 3 is a sectional view taken along the axis ox the drive shaft of another form of the invention As illustrated in Figure 1, the structure shown can be constructed as the housing of a moo or single drive, but it can also be constructed as halt of a bimotor drive in a monoblock structure as is, for example, well suited for short haul tray f to .
In the case of a bimotor drive in a monoblock structure support is not required since two sides of the 3~7~
monoblock are held by the axle gearings Otherwise, a support of the motor housing occurs in the center of gravity of the axle gearing and motor unit, that is, at the axle gearing at the side of the traction motor.
In the structure shown the drywall motor is shown to the right of the figure, and the driving rail wheel and its driving gear are shown to the left, all enclosed in a rigid housing of parts suitably interconnected. These housing parts may be secured to each other in various suitable ways which need not be described in detail, but will be apparent to those versed in the art from the description of the overall structure. The enclosure includes a housing 1 for the driving electric motor which includes a stators winding 2 mounted within the housing, and a rotor winding 3 which is rotatable carried in the housing. The rotor winding 3 is coccal mounted on a hollow shaft 4. Extending coccal within the hollow shaft 4 is a pinion shaft 5. The pinion shaft 5 is drivingly and releasable connected to the motor hollow shaft 4 by a friction type lock with a releasable clamping ring such as including a bi-conical ring 12, which is a preferred form, although other forms of releasable driving connections between the shafts 4 and 5 may be adopted.
The pinion shaft 5 is supported radially for rotation in radial bearings it and 7 which are suitably carried on the overall housing, which housing includes the motor housing 1 and the gear housing 17. Also included within the structure it a thrust bearing 8 which supports the pinion shaft 5 and which is located between the motor and a pinion gear 14 on the shaft so that essentially all of the driving portion of the shaft 5 is between the thrust I
bearing 8 and the connection of the shaft 5 to the hollow motor shaft 4. The connection 12 which drivingly interconnects the motor shaft 4 and the gear shaft Jo it constructed so that relative axial movement can be countenanced between the hollow motor shaft 4 an the drive shaft 5 and therefore no internally induced axial stresses will be transmitted to the thrust bearing 8 so that this contributes to retaining the alignment between the drive pinion 14 and the driven bull gear 15.
The hollow shaft 4 of the motor 1, and the elements carried thereon are not seated in ball bearings, but rather are supported on the pinion shaft 5 held on a bushing 9 positioned between the pinion shaft 5 and the hollow shaft 4 on the left side of the motor, as shown in the drawing, which is the opposite end of the motor from the location of the drive connection 12. The bushing positively carries the hollow shaft 4, but accommodates relative limited axial movement such as might occur with changes in length due to temperature variation. The other end of the hollow shaft 4, opposite the bushing is axial supported by the drive connection 12.
The bearings 6 an 7 which radially support the pinion shaft 5 are sealed and protected by a labyrinth seal 13, protecting the bearing 6 and by flanged seal 11, protecting the radial bearing 7 and the thrust bearing 8.
The hollow motor shaft 4 alto carries a fan 18 which ventilates the interior of the housing 1 through end openings aye and 18b in the housing for cooling the motor.
A driving axle 16 is secured to the driving rail wheel and carries a bull gear 15 driven by the pinion 14.
Pro the purpose of accepting the pinion bearing 7, the axle , . . , . . .
I
gearing housing 17 has an annular extension or neck portion 19 which is flanged so as to be secured to the motor housing 1 by suitable means. The drive unit thus is compact and retains adjuster with the pinion 14 maintaining its proper axial position relative to the bull gear 15 as determined by the radial support bearing 7 and the thrust bearing 8, which are locked in positive adjustment at the time the mechanism is assembled. The pinion shaft 5 is of considerable length to permit torsional and radial elasticity due to drive stresses and due to changes in dimension with thermal changes, and the drive power for the mechanism is positively delivered from the electric motor rotor through the gearing to the driving rail wheel with a compact construction.
In the arrangement of Figure 2, another torsionally elastic arrangement is provided with further torsional elasticity introduced, and this construction provides a slightly longer structure than the arrangement of Figure 1, but employs similar principles in utilizing a motor shalt which can be fully hollow but need only be only be partially hollow. The motor shaft I is supported in radial bearings 21 and 23 which are supported in a motor housing 1'. The motor includes a stators 2' within the housing and a rotor 3' which is carried directly on the shaft 20 as is a ventilating fan 18l. The motor shalt 20 has a hollow or bored portion into which an end Z3 of the pinion shaft 5' is inserted. The end 23 is guided or centered with a bushing 22 between the interior of the motor shaft 20 anal the extension 23.
The rotational drive between the motor and the pinion shaft 5' is accomplished by a torsionally elastic connection 24 providing a driving coupling. the torsionally ~3~7~
elastic connection, or coupling 24, is suitably connected such as by splints shown diagrammatically by the dotted lines to the motor shaft 20 and Jo the pinion shaft 5'0 A bull gear 29 is ion driving mesh with the pinion 31 on the pinion shaft 5 , and the bull gear 29 it carried on a rail wheel axle 16'. The bull gear I and the drive pinion 31 are carried in the axle gearing housing 35 which has a flange-like neck extension 33 to connect to the motor housing 1'. The neck 33 is of sufficient length to accommodate the elastic coupling 24. A bearing flange 30 holds a thrust bearing 32 and a radial bearing 27 which are assembled by being inserted into the housing neck 33, and these bearings radially and axially position the pinion shaft 5 maintaining the pinion 31 in proper mesh with the bull gear 29. The coupling 24 is connected to the pinion shaft by splints as above described or by means of a screwed-on bushing 25. this arrangement can be designed as both a jingle motor drive having a support in the center of gravity or as a bimotor arrangement in monoblock structure.
In the arrangement of Figure 3, a herringbone gear drive is utilized Driving rail wheels 60 and 61 are shown mounted on an axle 16", A pinion shaft 44 extends through a hollow shaft 43 which supports the rotor winding 42 of the motor with a ventilating fan 480 The motor is enclosed by a housing 40 which surrounds the twitter winding 41. A right hand end bearing 28" at the end opposite a pinion 52 is supported in the housing. A labyrinth seal having part I and 46 protects the bearing from the motor. A labyrinth seal I at the other end of the pinion shaft protects a bearing 50 which supports the pinion end of the pinion shaft 44. the I
bearing 28i' and 50 are radial bearings, and the need for an axial thrust bearing is eliminated by the use of the herringbone pinion and herringbone bull gears 53 which have teeth cut in opposite directions to eliminate axial thrust.
A guide bushing 47 is provided at the pinion end of the pinion shaft 44 supporting and centering the hollow shaft 43 of the motor. The other end of the pinion shaft supports the hollow motor shaft 43 at the location of a releasable bi-conical ring drive 12". The drive acts as a clutch and may take various forms, but is shown as a bit conical arrangement with a center hub that has sloping shoulders and outer rings which clamp to the shoulders when pressed together. The outer rings are connected to an end ring mounted on the shaft so that when the outer rings are pressed together, the shaft 44 will be drivingly connected to the hollow shaft 43. Spreading of the rings will release the two shafts. The arrangement transmits rotary driving torque from the motor hollow shaft 43 to the pinion shaft 44 at the right end providing a pinion shaft of substantial length to accommodate operational factors such as drive torsion, misalignment, vibration and temperature changes.
The pinion shaft 44 is seated coccal and statically in the bearings 28" and 50" at its ends. The arrangement of the coaxial parallel nested shafts is particularly well suited for driving axles with three phase motors. Within the framework of the concepts of the invention, other traction motors can be employed. The advantages of low structural size and a low number of bearings is accomplished through both arrangements.
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Thus it will be seen that we have provided an improved drive for an electrical rail traction vehicle which achieves the advantages and objectives above set forth, and applicants wish to cover all equivalent structures and embodiments embraced within the concepts of the foregoing described invention.
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Claims (9)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Drive for electric rail traction vehicles comprising a housing motor having a rotor on a motor shaft fashioned at least partially hollow, said housing motor driving a live axle via an axle gearing whose housing contains a large gearwheel on the live axle and, meshing therewith, a pinion with a pinion shaft which projects at least partly into the motor shaft and is connected thereto and is placed in a radial bearing at at least one end, characterized in that the housing of the motor and the gearing housing are rigidly joined to one another; and in that the pinion shaft is also placed in a radial bearing at its other end and supports the hollow motor shaft over the entire length of the latter, these two shafts comprise a guide bush among one another and are releasably connected to one another by a single drive connection.
2. Drive for electric rail traction vehicles comprising a housing motor having a rotor on a motor shaft fashioned at least partially hollow, said housing motor driving a live axle via an axle gearing whose housing contains a large gearwheel on the live axle and, meshing therewith, a pinion with a pinion shaft which projects at least partly into the motor shaft and is connected thereto and is placed in a radial bearing at at least one end, whereby the motor shaft comprises a radial bearing at the pinion side, characterized in that the housing of the motor and the gearing housing are rigidly joined to one another, the motor shaft accepts the other, free end of the pinion shaft in a bore and supports it via a guide bush; and in that the two shafts are releasably connected to one another via a single drive connection.
3. Drive according to claim 2, characterized in that the drive connection unites the motor shaft and the pinion shaft into a motor-pinion shaft unit, preferably non-positively.
4. Drive according to claim 1 and 3, characterized in that the non-positive drive connection is situated at that side of the motor which lies opposite the pinion.
5. Drive according to one of the claims 1 through 3, characterized in that the motor-pinion shaft unit is seated in the axle gearing housing at the side of the pinion.
6. Drive according to claims 1 or 2 or 3, characterized in that the motor is designed as a dual motor.
7. Drive according to claims 1 or 2 or 3, characterized in that said drive comprises an axial bearing, particularly a two-row separable bearing for the axial adjustment of the motor-pinion shaft unit.
8. Drive according to claim 1, characterized in that motor and live axle are arranged parallel to one another.
9. Drive according to claim 8, characterized in that the axle gearing is fashioned as a herringbone-toothed gearing whose gearwheels are, in particular, executed divided.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3144999.9 | 1981-11-12 | ||
| DE19813144999 DE3144999A1 (en) | 1981-11-12 | 1981-11-12 | DRIVE FOR ELECTRIC RAIL VEHICLES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1213470A true CA1213470A (en) | 1986-11-04 |
Family
ID=6146262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000415049A Expired CA1213470A (en) | 1981-11-12 | 1982-11-08 | Drive for electric rail traction vehicles |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0079455B1 (en) |
| JP (1) | JPS5889459A (en) |
| AT (1) | ATE22373T1 (en) |
| BR (1) | BR8206481A (en) |
| CA (1) | CA1213470A (en) |
| DE (2) | DE3144999A1 (en) |
| ES (1) | ES8306346A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD821930S1 (en) | 2016-06-06 | 2018-07-03 | Axletech International Ip Holdings, Llc | Gearbox assembly for an axle |
| US10882389B2 (en) | 2016-05-06 | 2021-01-05 | Allison Transmission, Inc. | Axle assembly with electric motor |
| USD927578S1 (en) | 2018-09-27 | 2021-08-10 | Allison Transmission, Inc. | Axle assembly |
| US11247556B2 (en) | 2015-12-17 | 2022-02-15 | Allison Transmission, Inc. | Axle assembly for a vehicle |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3515963C2 (en) * | 1985-04-30 | 1986-12-04 | Licentia Gmbh | Integrated longitudinal drive |
| DE4015380A1 (en) * | 1990-05-14 | 1991-11-21 | Bergische Stahlindustrie | COMPOSED SINGLE-WHEEL CHASSIS FOR RAIL VEHICLES |
| CN1244907A (en) * | 1996-11-07 | 2000-02-16 | 通用信号公司 | Transmission assembly |
| AT404016B (en) * | 1997-02-17 | 1998-07-27 | Heraklith Ag | Sealing material |
| DE102006056238A1 (en) * | 2006-11-27 | 2008-05-29 | Graessner Gmbh & Co. Kg The Gear Company | Short servomotor with angular gear |
| DE102007008658A1 (en) | 2007-02-20 | 2008-08-21 | Flender Industriegetriebe Gmbh & Co. Kg | Bevel gear units, in particular bevel helical gear units |
| FR2946307B1 (en) * | 2009-06-05 | 2011-08-05 | Alstom Transport Sa | BOGIE RAILWAY VEHICLE ENGINE COMPRISING A SEMI-SUSPENDED ENGINE |
| CN102097889B (en) * | 2011-02-17 | 2016-07-13 | 国电联合动力技术有限公司 | A kind of driving chain of wind generating set |
| DE102012213920A1 (en) * | 2012-08-06 | 2014-02-06 | Voith Patent Gmbh | Gear unit and drive unit with a gear unit |
| US8858379B2 (en) | 2012-09-21 | 2014-10-14 | Arvinmeritor Technology, Llc | Axle assembly having an electric motor module |
| DE102012222273A1 (en) * | 2012-12-05 | 2014-06-05 | Schaeffler Technologies Gmbh & Co. Kg | Drive device for use in four-wheel vehicle, has pinion with pinion shaft driven by electrical machine, and pinion shaft bearing provided with series of balls in radial-thrust bearing arrangement and sensor unit |
| CN105292138A (en) * | 2015-11-20 | 2016-02-03 | 南车株洲电力机车有限公司 | High power locomotive transmission device |
| USD883864S1 (en) | 2018-05-10 | 2020-05-12 | Allison Transmission, Inc. | Axle assembly |
| DE102018212041A1 (en) * | 2018-07-19 | 2020-01-23 | Robert Bosch Gmbh | Wiper drive and method for mounting the wiper drive |
| DE102018218974B3 (en) * | 2018-11-07 | 2019-12-12 | Zf Friedrichshafen Ag | Final gear unit for a rail vehicle |
| CN112572478B (en) * | 2020-12-30 | 2024-04-16 | 中车资阳机车有限公司 | Traction transmission device for locomotive |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT154719B (en) * | 1936-05-28 | 1938-10-25 | Bbc Ag Oesterr | Drive for electrically operated vehicles, in particular for light rail vehicles and road vehicles. |
| AT254257B (en) * | 1965-01-27 | 1967-05-10 | Wiener Starkstromwerke Gmbh | Single axle drive for electric traction vehicles |
| DE1965816A1 (en) * | 1969-12-23 | 1971-07-01 | Siemens Ag | Drive for electric locomotives |
| DE2514265C3 (en) * | 1975-03-27 | 1979-06-13 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Drive for an electric rail vehicle |
-
1981
- 1981-11-12 DE DE19813144999 patent/DE3144999A1/en not_active Withdrawn
-
1982
- 1982-09-29 ES ES516076A patent/ES8306346A1/en not_active Expired
- 1982-10-04 DE DE8282109143T patent/DE3273365D1/en not_active Expired
- 1982-10-04 EP EP82109143A patent/EP0079455B1/en not_active Expired
- 1982-10-04 AT AT82109143T patent/ATE22373T1/en not_active IP Right Cessation
- 1982-11-08 CA CA000415049A patent/CA1213470A/en not_active Expired
- 1982-11-09 BR BR8206481A patent/BR8206481A/en unknown
- 1982-11-10 JP JP57196140A patent/JPS5889459A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11247556B2 (en) | 2015-12-17 | 2022-02-15 | Allison Transmission, Inc. | Axle assembly for a vehicle |
| US11951828B2 (en) | 2015-12-17 | 2024-04-09 | Allison Transmission, Inc. | Axle assembly for a vehicle |
| US10882389B2 (en) | 2016-05-06 | 2021-01-05 | Allison Transmission, Inc. | Axle assembly with electric motor |
| USD821930S1 (en) | 2016-06-06 | 2018-07-03 | Axletech International Ip Holdings, Llc | Gearbox assembly for an axle |
| USD869348S1 (en) | 2016-06-06 | 2019-12-10 | Allison Transmission, Inc. | Gearbox assembly for an axle |
| USD927578S1 (en) | 2018-09-27 | 2021-08-10 | Allison Transmission, Inc. | Axle assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| ES516076A0 (en) | 1983-06-01 |
| JPS5889459A (en) | 1983-05-27 |
| ATE22373T1 (en) | 1986-10-15 |
| DE3144999A1 (en) | 1983-05-19 |
| EP0079455A1 (en) | 1983-05-25 |
| DE3273365D1 (en) | 1986-10-23 |
| ES8306346A1 (en) | 1983-06-01 |
| EP0079455B1 (en) | 1986-09-17 |
| BR8206481A (en) | 1983-09-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |