EP0571961B1 - A bogie for a railway vehicle with drive motors and reduction units suspended from the chassis - Google Patents
A bogie for a railway vehicle with drive motors and reduction units suspended from the chassis Download PDFInfo
- Publication number
- EP0571961B1 EP0571961B1 EP93108449A EP93108449A EP0571961B1 EP 0571961 B1 EP0571961 B1 EP 0571961B1 EP 93108449 A EP93108449 A EP 93108449A EP 93108449 A EP93108449 A EP 93108449A EP 0571961 B1 EP0571961 B1 EP 0571961B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bogie
- chassis
- motor
- wheel
- axle
- 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 - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F3/00—Types of bogies
- B61F3/16—Types of bogies with a separate axle for each wheel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C9/00—Locomotives or motor railcars characterised by the type of transmission system used; Transmission systems specially adapted for locomotives or motor railcars
- B61C9/38—Transmission systems in or for locomotives or motor railcars with electric motor propulsion
- B61C9/48—Transmission systems in or for locomotives or motor railcars with electric motor propulsion with motors supported on vehicle frames and driving axles, e.g. axle or nose suspension
- B61C9/50—Transmission systems in or for locomotives or motor railcars with electric motor propulsion with motors supported on vehicle frames and driving axles, e.g. axle or nose suspension in bogies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F3/00—Types of bogies
- B61F3/02—Types of bogies with more than one axle
- B61F3/04—Types of bogies with more than one axle with driven axles or wheels
Definitions
- the present invention relates to a bogie for railway vehicles, including vehicles for light or conventional metropolitan networks.
- Such a transmission normally includes a reduction unit and one or more couplings operable to compensate for relative movements between the motor and the axles.
- each wheel is mounted on a structure carrying also the motion transmitting gears and the relevant motor.
- the structure is mounted on the chassis by means of an articulation pin, whereas the motor is mounted on the structure with its rotation axis perpendicular to the axis of the articulation pin. Therefore, a rotation of the structure around the articulation pin causes a corresponding oscillation of the motor, the geras and the motor axis perpendicularly to the articulation pin.
- the object of the invention is to provide a bogie for railway vehicles which is extremely simple and safe in operation, and eliminates the disadvantages of the prior art listed above.
- the bogie for railway vehicles including a rigid chassis, at least two pairs of wheels with each wheel fixed to a corresponding axle, at least one of the wheels being driven by a corresponding drive motor, a structure articulated on the chassis and rotatably mounting the axle of said at least one driven wheel, said structure mounting said motor and transmission means for transmitting drive from the motor to the axle, and primary resilient suspension means between the chassis and the structure, said structure being articulated on the chassis by means of an articulation pin, characterised in that said motor is positioned on said structure with its axis of rotation coincident with the axis of said articulation pin, whereby the centre of gravity of said motor lies on the axis of said articulation pin.
- Such a bogie achieves the result of carrying the weight of the drive motor, or motors, so that they are entirely suspended while a considerable portion of the weight of the reduction unit is also suspended so that the transmission means do not have to absorb relative movements between the axle and the chassis due to the primary suspension of the bogie.
- the invention thus simplifies the problem, enabling the motor to be entirely suspended, the reduction unit to be semi-suspended and the drive to be transmitted directly from the motor to the reduction unit and from this to the wheel.
- the chassis of a railway bogie is generally indicated 5 and includes a pair of robust symmetrical longitudinal members 6, of inverted-U shape, of which only part of one is visible in the drawings.
- the longitudinal members 6 are connected to each other by at least two cross-members 4, each of which may be shaped, for example, like a tubular bar.
- the bogie includes two pairs of wheels 10.
- One end of a longitudinal member 6 is illustrated schematically in the drawings and a structure 8, commonly known as a "reduction unit” and which acts as a wishbone, is fixed to the said end by means of an articulation pin 7.
- the structure 8 encloses a speed reducer 20 and houses bearings 14 and 15 carrying an axle 9 on which a wheel 10 is mounted.
- the two wheels 10 are therefore independent. This is particularly useful both for high-speed railway vehicles and for vehicles for city and suburban lines which are often required to travel on tortuous networks.
- the independent wheels 10 avoid the risk of snaking movements caused by the cone angle of the wheel rims and therefore avoid any resulting transverse instability of the bogie.
- bogies with independent wheels 10 eliminate the anti-steering effect of the axle 9, which is due to the different developments of the inner and outer tracks 13, and therefore any longitudinal slippage between the wheels 10 and tracks 13. In this way, any annoying flats are eliminated from the rolling face of the wheel, thus reducing the need for expensive re-turning of the wheels 10.
- a brake disc 16 is securely fixed to one end of the axle 9, in the case described the axle 9 inwards of the chassis 5.
- a brake calliper 17, acting on the disc 16, is carried by the structure 8.
- the usual primary suspension assembly for the bogie, generally indicated 11, is also fixed to the ends of the longitudinal members 6.
- the assembly 11 includes, in particular, resilient suspension means of any type, operable to ensure the optimum suspension of the vehicle and acting through a fulcrum 21 on an arm 18 fixed to the structure 8.
- a drive motor 12 for the wheel 10 is mounted on the side of the structure 8 ( Figure 1), its position being fixed so that its axis of rotation, on which its centre of gravity also lies, coincides with the axis of the pin 7 articulating the chassis 5 to the structure 8.
- the speed reducer 20 is operable to reduce and transmit the rotation from the shaft of the motor 12 to the axle 9 and thereby to the wheel 10. Therefore the weight of the motor 12 bears only on the primary suspension 11.
- the need is eliminated for any devices on the bogie to compensate for any relative movements between the motor 12 and the wheel 10 due to the primary suspension.
- the geared drive transmission unit is carried by the same structure 8 as that which supports the motor 12, eliminates the need for devices to compensate for relative movements.
- the structure 8 is perfectly adapted for the independent drive of each wheel 10 of the bogie, thereby satisfying the requirements of high-speed vehicles and those of suburban vehicles.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
- Platform Screen Doors And Railroad Systems (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
Description
- The present invention relates to a bogie for railway vehicles, including vehicles for light or conventional metropolitan networks.
- In railway vehicles it is important to reduce that portion of the weight of the bogie which bears directly on the wheels without interposed resilient suspension means, that is, to reduce the non-suspended weight of the bogie. In fact, as this weight increases, the bogie becomes more aggressive towards the tracks, increasing the stresses and vibrations transmitted to the latter when a train passes.
- This problem is more serious in the case of drive bogies, in which the weight of the bogie itself is increased by the presence of a motor, for example an electric motor, and the transmission required to transmit the drive from the motor to the wheels. Such a transmission normally includes a reduction unit and one or more couplings operable to compensate for relative movements between the motor and the axles.
- In order to reduce the aggressiveness of the drive bogie towards the track, bogies have been proposed which have their motors entirely suspended from the bogie chassis, but have the weight of the reduction unit bearing on the axle. Other prior art arrangements provide for the reduction unit to be entirely suspended from the bogie chassis. However these arrangements involve a complicated drive transmission between the reduction unit and the axle/wheel assembly.
- From the document DE-A-2 910 392, a bogie for a tramway vehicles is known, wherein each wheel is mounted on a structure carrying also the motion transmitting gears and the relevant motor. The structure is mounted on the chassis by means of an articulation pin, whereas the motor is mounted on the structure with its rotation axis perpendicular to the axis of the articulation pin. Therefore, a rotation of the structure around the articulation pin causes a corresponding oscillation of the motor, the geras and the motor axis perpendicularly to the articulation pin.
- The object of the invention is to provide a bogie for railway vehicles which is extremely simple and safe in operation, and eliminates the disadvantages of the prior art listed above.
- This object is achieved by the bogie for railway vehicles according to the invention, including a rigid chassis, at least two pairs of wheels with each wheel fixed to a corresponding axle, at least one of the wheels being driven by a corresponding drive motor, a structure articulated on the chassis and rotatably mounting the axle of said at least one driven wheel, said structure mounting said motor and transmission means for transmitting drive from the motor to the axle, and primary resilient suspension means between the chassis and the structure, said structure being articulated on the chassis by means of an articulation pin, characterised in that said motor is positioned on said structure with its axis of rotation coincident with the axis of said articulation pin, whereby the centre of gravity of said motor lies on the axis of said articulation pin.
- Such a bogie achieves the result of carrying the weight of the drive motor, or motors, so that they are entirely suspended while a considerable portion of the weight of the reduction unit is also suspended so that the transmission means do not have to absorb relative movements between the axle and the chassis due to the primary suspension of the bogie.
- The invention thus simplifies the problem, enabling the motor to be entirely suspended, the reduction unit to be semi-suspended and the drive to be transmitted directly from the motor to the reduction unit and from this to the wheel.
- In order to provide a clearer understanding of the invention, a preferred embodiment of the bogie is described here, purely by way of example and with the assistance of the appended drawings, in which:
- Figure 1 is a partial plan view of a railway bogie according to the invention; and
- Figure 2 is a section taken on the line II-II of Figure 1.
- With reference to Figure 1, the chassis of a railway bogie is generally indicated 5 and includes a pair of robust symmetrical longitudinal members 6, of inverted-U shape, of which only part of one is visible in the drawings. The longitudinal members 6 are connected to each other by at least two
cross-members 4, each of which may be shaped, for example, like a tubular bar. - The bogie includes two pairs of
wheels 10. One end of a longitudinal member 6 is illustrated schematically in the drawings and astructure 8, commonly known as a "reduction unit" and which acts as a wishbone, is fixed to the said end by means of anarticulation pin 7. Thestructure 8 encloses aspeed reducer 20 andhouses bearings wheel 10 is mounted. In the example illustrated, the twowheels 10 are therefore independent. This is particularly useful both for high-speed railway vehicles and for vehicles for city and suburban lines which are often required to travel on tortuous networks. - In fact, for high-speed vehicles, the
independent wheels 10 avoid the risk of snaking movements caused by the cone angle of the wheel rims and therefore avoid any resulting transverse instability of the bogie. In vehicles for city or suburban lines, which have curves of a small radius, often down to 15 metres, bogies withindependent wheels 10 eliminate the anti-steering effect of the axle 9, which is due to the different developments of the inner andouter tracks 13, and therefore any longitudinal slippage between thewheels 10 andtracks 13. In this way, any annoying flats are eliminated from the rolling face of the wheel, thus reducing the need for expensive re-turning of thewheels 10. - A
brake disc 16 is securely fixed to one end of the axle 9, in the case described the axle 9 inwards of thechassis 5. Abrake calliper 17, acting on thedisc 16, is carried by thestructure 8. The usual primary suspension assembly for the bogie, generally indicated 11, is also fixed to the ends of the longitudinal members 6. Theassembly 11 includes, in particular, resilient suspension means of any type, operable to ensure the optimum suspension of the vehicle and acting through afulcrum 21 on anarm 18 fixed to thestructure 8. - In addition, a
drive motor 12 for thewheel 10 is mounted on the side of the structure 8 (Figure 1), its position being fixed so that its axis of rotation, on which its centre of gravity also lies, coincides with the axis of thepin 7 articulating thechassis 5 to thestructure 8. Thespeed reducer 20 is operable to reduce and transmit the rotation from the shaft of themotor 12 to the axle 9 and thereby to thewheel 10. Therefore the weight of themotor 12 bears only on theprimary suspension 11. In addition, the need is eliminated for any devices on the bogie to compensate for any relative movements between themotor 12 and thewheel 10 due to the primary suspension. - The advantages of the bogie of the invention over prior art bogies will be apparent from the above description. In fact, as the centre of gravity of the
motor 12 lies on the axis of articulation of thestructure 8, the weight of themotor 12 does not bear on the axle 9 and therefore its mass does not have to follow the relative movement of thewheel 10 caused by the suspension. - In addition, the fact that the geared drive transmission unit is carried by the
same structure 8 as that which supports themotor 12, eliminates the need for devices to compensate for relative movements. Finally, thestructure 8 is perfectly adapted for the independent drive of eachwheel 10 of the bogie, thereby satisfying the requirements of high-speed vehicles and those of suburban vehicles. - It is clear that alterations and improvements may be made to the bogie described without departing from the scope of the present invention.
Claims (2)
- A bogie for railway vehicles, including a rigid chassis (5), at least two pairs of wheels (10) with each wheel fixed to a corresponding axle (9), at least one of the wheels (10) being driven by a corresponding drive motor (12), a structure (8) articulated on the chassis (5) and rotatably mounting the axle (9) of said at least one driven wheel (10), said structure (8) mounting said motor (12) and transmission means (20) for transmitting drive from the motor (12) to the axle (9), and primary resilient suspension means (11) between the chassis (5) and the structure (8), said structure (8) being articulated on the chassis (5) by means of an articulation pin (7), characterised in that said motor (12) is positioned on said structure (8) with its axis of rotation coincident with the axis of said articulation pin (7), whereby the centre of gravity of said motor (12) lies on the axis of said articulation pin (7).
- A bogie according to Claim 1, characterised in that the said structure (8) supports an axle (9) on which a corresponding wheel (10) is fixed, the wheels (10) of a pair being driven by independent motors (12).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITTO920448A IT1257195B (en) | 1992-05-26 | 1992-05-26 | TROLLEY FOR RAILWAY VEHICLES WITH TRACTION MOTORS AND GEARBOXES SUSPENDED ON THE FRAME. |
ITTO920448 | 1992-05-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0571961A1 EP0571961A1 (en) | 1993-12-01 |
EP0571961B1 true EP0571961B1 (en) | 1997-08-06 |
Family
ID=11410489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93108449A Expired - Lifetime EP0571961B1 (en) | 1992-05-26 | 1993-05-25 | A bogie for a railway vehicle with drive motors and reduction units suspended from the chassis |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0571961B1 (en) |
AT (1) | ATE156437T1 (en) |
DE (1) | DE69312803T2 (en) |
IT (1) | IT1257195B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6821269B1 (en) | 1998-05-01 | 2004-11-23 | Roger Boulanger | Sanitary absorbent article having flaps |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4446043C1 (en) | 1994-12-22 | 1996-03-07 | Siemens Ag | Electric rail vehicle running chassis |
DE19515588C1 (en) * | 1995-04-27 | 1996-07-25 | Siemens Ag | Rail vehicle chassis |
DE19819467A1 (en) * | 1998-04-30 | 1999-11-11 | Zahnradfabrik Friedrichshafen | Bogie for rail vehicles |
US7082881B2 (en) | 2003-01-27 | 2006-08-01 | Ensco, Inc. | Mount apparatus for mounting a measurement device on a rail car |
CN102490744A (en) * | 2011-12-09 | 2012-06-13 | 中铁隧道装备制造有限公司 | Tunnel industrial and mining locomotive bogie |
CN109318909A (en) * | 2017-12-22 | 2019-02-12 | 中车长春轨道客车股份有限公司 | Track train and its motor suspension gear |
DE102019211172B4 (en) * | 2019-07-26 | 2021-02-25 | Siemens Mobility GmbH | Single axle drive and rail vehicle |
DE102019216088A1 (en) * | 2019-10-18 | 2021-04-22 | Siemens Mobility GmbH | Arrangement for positioning a wheel of a rail vehicle |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2910392A1 (en) * | 1979-03-16 | 1980-09-25 | Thyssen Industrie | Railway vehicle or tram bogie mounting - has mitre gears inside individually driven wheels on rocker arms |
IT1228887B (en) * | 1989-02-24 | 1991-07-09 | Socimi | MULTI-PURPOSE TROLLEY FOR RAIL VEHICLES |
FR2664222B1 (en) * | 1990-07-05 | 1993-01-15 | Alsthom Gec | BOGIE WITH INDEPENDENT MOTORIZED WHEELS FOR RAIL VEHICLE. |
-
1992
- 1992-05-26 IT ITTO920448A patent/IT1257195B/en active IP Right Grant
-
1993
- 1993-05-25 EP EP93108449A patent/EP0571961B1/en not_active Expired - Lifetime
- 1993-05-25 DE DE69312803T patent/DE69312803T2/en not_active Expired - Fee Related
- 1993-05-25 AT AT93108449T patent/ATE156437T1/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6821269B1 (en) | 1998-05-01 | 2004-11-23 | Roger Boulanger | Sanitary absorbent article having flaps |
Also Published As
Publication number | Publication date |
---|---|
DE69312803D1 (en) | 1997-09-11 |
EP0571961A1 (en) | 1993-12-01 |
ITTO920448A1 (en) | 1993-11-26 |
IT1257195B (en) | 1996-01-10 |
ITTO920448A0 (en) | 1992-05-26 |
DE69312803T2 (en) | 1998-03-12 |
ATE156437T1 (en) | 1997-08-15 |
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