EP4026749B1 - Motor bogie for rail vehicle - Google Patents

Description

The present invention relates to a motor bogie for a railway vehicle, of the type comprising: a frame extending in a horizontal longitudinal direction corresponding to a direction of movement of the vehicle; a motor ; and a transmission device, adapted to be rotated relative to the frame, around a horizontal axis perpendicular to the longitudinal direction; the motor bogie further comprising a first fixing rod, the motor and the frame being adapted to be fixed to each other in an assembled configuration by said first fixing rod.

Such a motor bogie, known for example from the document US2017/0282939 , makes it possible to reversibly separate the chassis and the engine, in particular for the purpose of maintenance of said engine.

Another engine bogie is known from the document WO 2009/056415 A1 .

However, for a heavy engine, a significant vertical force is exerted on the mounting(s) connecting the engine and the frame. There is then a risk of the fixing(s) breaking, which could cause the engine to fall.

Furthermore, it is preferable to be able to disassemble the engine from below the rail vehicle. Otherwise, it is necessary to dissociate the engine bogie and the body of the vehicle before any intervention on said engine, which considerably increases the maintenance operations.

In order to solve these problems, the subject of the invention is a motor bogie according to claim 1.

• le dispositif de transmission comprend une bielle de réaction, ladite bielle étant déportée par rapport au moteur selon la direction transversale ; et le châssis comporte une attache de bielle, disposée entre ladite bielle et ledit moteur selon ladite direction transversale, l'attache étant de préférence intégrée à une des pattes de fixation du moteur ;
• le châssis et le moteur comportent respectivement une première et une deuxième surfaces sensiblement horizontales, telles que, dans la configuration assemblée, lesdites première et deuxième surfaces sont au contact l'une de l'autre et respectivement orientées vers le haut et vers le bas ;
• une dimension de la première et/ou de la deuxième surfaces selon la direction longitudinale est comprise entre 8 et 25 mm ;
• le bogie moteur comprend en outre une deuxième tige de fixation, destinée à traverser les deuxièmes patte et zone de fixation dans la configuration assemblée ;
• le pion de blocage est apte à coulisser dans les première et deuxième ouvertures selon une direction perpendiculaire à la première tige de fixation ;
• la deuxième ouverture de blocage est ménagée dans une zone du moteur, ledit zone étant adjacent de l'espace central ;
• la première ouverture de blocage du premier organe de blocage est portée par la première patte de fixation ; et le bogie moteur comprend en outre un deuxième organe de blocage du moteur et du châssis, porté par la deuxième patte de fixation.

According to other advantageous aspects of the invention, the motor bogie comprises one or more of the following characteristics, taken in isolation or in all technically possible combinations:

• the transmission device comprises a reaction rod, said rod being offset relative to the engine in the transverse direction; and the chassis includes a connecting rod attachment, disposed between said connecting rod and said engine in said direction transverse, the attachment preferably being integrated into one of the engine mounting brackets;
• the chassis and the engine respectively comprise a first and a second substantially horizontal surfaces, such that, in the assembled configuration, said first and second surfaces are in contact with one another and respectively oriented upwards and downwards;
• a dimension of the first and/or of the second surfaces in the longitudinal direction is between 8 and 25 mm;
• the motor bogie further comprises a second fixing rod, intended to pass through the second lug and fixing zone in the assembled configuration;
• the locking pin is able to slide in the first and second openings in a direction perpendicular to the first fixing rod;
• the second blocking opening is provided in a zone of the motor, said zone being adjacent to the central space;
• the first blocking opening of the first blocking member is carried by the first fixing lug; and the motor bogie further comprises a second member for blocking the motor and the frame, carried by the second fixing lug.

The invention further relates to a railway vehicle comprising a body, wheels capable of entering into rotation relative to the body; and at least one motor bogie as described above, able to actuate the wheels; said motor bogie being arranged adjacent to a lower space located under the body.

• [Fig 1] la figure 1 est une représentation schématique d'un véhicule ferroviaire selon un mode de réalisation de l'invention, comprenant un bogie moteur ;
• [Fig 2] la figure 2 est une vue de détail, de dessous, du bogie moteur de la figure 1 ; et
• [Fig 3] [Fig 4] [Fig 5] les figures 3, 4 et 5 sont des vues de détail, en coupe partielle, du bogie moteur de la figure 2.

The invention will be better understood on reading the following description, given solely by way of non-limiting example and made with reference to the drawings in which:

• [ Fig 1 ] there figure 1 is a schematic representation of a railway vehicle according to one embodiment of the invention, comprising a motor bogie;
• [ Fig 2 ] there figure 2 is a detail view, from below, of the motor bogie of the figure 1 ; And
• [ Fig.3 ] [ Fig 4 ] [ Fig.5 ] THE figure 3 , 4 And 5 are detail views, in partial section, of the motor bogie of the picture 2 .

There figure 1 shows a railway vehicle 10 according to one embodiment of the invention. The railway vehicle 10, for example of the train type, comprises at least one motor car 12 and preferably at least one passenger car 14, connected to said motor car.

The motor car 12 comprises a body 16, wheels 18 and at least one motor bogie 20 arranged under the body 16. The motor bogie 20, which will be described below, is capable of rotating the wheels 18 with respect to the crate 16.

In the remainder of the description, an orthonormal base (X, Y, Z) is considered, the direction Z representing the vertical.

The railway vehicle 10 is intended to move on rails 22, in a direction of movement parallel to the direction X, called the longitudinal direction.

A lower space 24 of the motor car 12 is defined vertically between the motor bogie 20 and a lower end of the wheels 18, in contact with the rails 22.

Motor bogie 20, shown alone in figure 2 , comprises a frame 30, at least one motor 32 and at least one transmission device 34, connected to said motor. The motor bogie 20 further comprises at least one element 35 for fixing the motor 32 to the frame 30 in an assembled configuration, shown in figures 2 to 5 .

Optionally, motor bogie 20 further comprises at least one safety device 36 for assembling motor 32 to frame 30.

In the embodiment shown, the frame 30 comprises a front part 37 and a rear part 38, said front and rear parts 37, 38 being substantially symmetrical. More specifically, the front 37 and rear 38 parts are symmetrical with respect to a point center 40, located between said parts. The terms “front” and “rear” are understood relative to the longitudinal direction X and to a direction of movement of the driving car 12.

With the exception of their orientation along X, the front 37 and rear 38 parts of the frame 30 are substantially identical and will be described simultaneously below.

The front or rear part 37, 38 of the chassis comprises: a transverse beam 42, arranged close to the center 40 of symmetry of the chassis; a first 44 and a second 46 fixing lugs; and first 48 and second 50 mounting brackets.

The transverse beam 42 extends along Y. The first 44 and second 46 fixing lugs are aligned along said transverse beam 42 and spaced from each other. Each of said first and second legs 44, 46 extends along X relative to the transverse beam 42, opposite the center 40 of symmetry, said tabs being substantially coplanar in a plane (X, Y).

One end of each of said first and second fixing lugs 44, 46, opposite to the transverse beam 42, is secured to a support 48, 50 for fixing. Each mounting bracket 48, 50 extends along Z on either side of the corresponding mounting bracket 44, 46. More specifically, each support 48, 50 for fixing comprises an upper member 52 and a lower member 54, projecting along Z with respect to the tab 44, 46 for corresponding fixing.

As will be described below, each upper 52 and lower 54 member has at least one assembly orifice 56 capable of cooperating with a fixing rod. Said assembly orifices are substantially arranged at the vertices of a rectangle whose sides extend along Y and along Z.

The front or rear part 37, 38 of the frame further comprises a receiving surface 60, substantially horizontal and oriented upwards.

In the embodiment shown, each mounting bracket 48, 50 comprises a receiving strip 62, substantially horizontal and oriented upwards, the two strips 62 forming the receiving surface 60 . Each reception band 62 is for example arranged at the level of the lower limb 54, as visible on the figures 3 to 5 .

Each receiving strip 62 extends substantially along Y. Preferably, each receiving strip 62 has a small dimension 63 along X, for example between 8 and 25 mm.

The motor 32 is intended to transfer a rotary motion to the wheels 18 relative to the body 16, by means of the device 34 of transmission. In particular, the transmission device 34 has an axis of rotation 65 parallel to Y.

In the embodiment shown, each of the front 37 and rear 38 parts of the frame 30 is assembled with a motor 32 and a separate transmission device 34 . In particular, the front and rear motors 32, assembled to the front 37 and rear 38 parts of the chassis, are substantially identical and will be described simultaneously below.

The motor 32 comprises a body 64, at least one attachment area 66; and a bearing surface 68.

The body 64 has a substantially cylindrical shape of revolution along an axis substantially parallel to Y. The at least one attachment zone 66 forms a projection with respect to said cylinder.

In the embodiment shown, the motor 32 comprises four fixing zones 66, substantially arranged at the vertices of a rectangle. Each fixing zone 66 includes an assembly hole 70 intended to cooperate with a fixing rod.

The bearing surface 68 of the motor 32 is intended to come into contact, in the assembled configuration, with the receiving surface 60 of the front or rear part 37, 38 of the chassis.

More precisely, the bearing surface 68 of the motor 32 is substantially horizontal and oriented downwards. In the embodiment shown, the support surface 68 is formed of two support strips 72, capable of coming into contact with one of the receiving strips 62 . Each backing strip 72 preferably has a shape similar to the corresponding receiving strip 62 .

In the embodiment shown, the support strips 72 are arranged close to the attachment zones 66 intended to be assembled with the lower limbs 54 of the supports 48, 50 for attachment.

In the assembled configuration, each fixing zone 66 of a motor 32 is in contact with an upper 52 or lower 54 member of a support 48, 50 for fixing the frame 30. As visible on the picture 2 , in the assembled configuration, a central space 75 is provided along X between said motor 32 and the nearest transverse beam 42. The central space is delimited along Y by the fixing lugs 44, 46 connected to the motor.

In addition, the central space 75 is open above and below the chassis 30. In particular, the central space 75 is open to the lower space 24 of the motor car 12.

The transmission device 34 comprises a reaction rod 76, visible on the figure 2 And 3 . In the embodiment shown, said connecting rod 76 is offset relative to motor 32 in the transverse direction Y; and one of the mounting brackets, in particular the second bracket 50, comprises a connecting rod attachment 78, disposed between said connecting rod 76 and said motor 32 in said transverse direction Y.

A connecting shaft (not shown) connects the connecting rod 76 and the connecting rod attachment 78, said shaft comprising two ends respectively assembled to the connecting rod 76 and the connecting rod attachment 78.

Compared to known solutions, such a configuration frees up the central space 75 and simplifies the connecting shaft, compared to a shaft passing through the connecting rod and connected to the connecting rod attachment by its two ends.

In the assembled configuration, fastener 35 fixedly connects motor 32 to frame 30.

In the embodiment shown, the fixing element 35 associated with a motor 32 comprises four fixing rods 80, for example of the screw type. Each mounting pin 80 is inserted into assembly holes 56 and 70 of both mounting bracket 48, 50 and mounting area 66 of motor 32. In the assembled configuration, each mounting pin 80 extends along X.

The presence of the receiving surface 60 allows the frame 30 to directly take up the weight of the motor 32 via the support surface 68. This configuration reduces the vertical force exerted on the fixing rods 80 in the assembled configuration, which reduces the risks of breakage of said rods and facilitates their dismantling.

In the embodiment shown, the assembly hole 56 of each support 48 is through; and each fixing rod 80 is associated with a screw head 82 enabling said screw to be maneuvered using a tool. In the assembled configuration, each screw head 82 is adjacent to the central space 75 between the motor 32 and the corresponding cross beam 42. As will be described below, this configuration facilitates the removal of said screws.

As a variant, the fixing rod is a stud, itself screwed into a threaded cylinder, which makes it possible to avoid having a thread in the engine.

The safety device 36, optional, is intended to prevent an untimely fall of the motor 32 from the frame 30 during disassembly or breakage of the fixing rods 80.

The safety device 36 comprises at least one member 84 for blocking the motor 32 and the frame 30. The blocking member 84 includes: a first 86 and a second 88 blocking openings, respectively carried by the frame 30 and by the motor 32; and a blocking pin 90.

In the embodiment shown, in particular on the figure 5 , the safety device 36 comprises a first and a second substantially identical blocking members 84, which will be described simultaneously below.

The first blocking opening 86 of each of the first and second blocking members 84 is carried by the upper member 52, respectively of the first 48 and of the second 50 fixing support.

The second blocking opening 88 of each of the first and second blocking members 84 is carried by a zone 92, secured to the body 64 of the motor and forming a projection relative to said body. Said second opening 88 is through.

In the assembled configuration, each of the first 86 and second 88 locking apertures extends along Y and said apertures are aligned.

The blocking pin 90 is able to slide along Y in the first 86 and second 88 aligned blocking openings. In the assembled configuration, said pin 90 is inserted into said openings.

Preferably, the blocking member 84 is configured so that the pin 90 can be maneuvered from the central space 75. In particular, the zone 92 of each blocking member 84 extends into the central space 75 in the configuration assembly.

In the motor bogie 20 described above, it is possible to remove each motor 32 from the frame 30 by intervening from above or below said frame. In particular, it is possible to disassemble and reassemble the engine 32 from the lower space 24 of the motor car 12 of the figure 1 .

The motor bogie 20 being integrated into the motor car 12, a method of dismantling the motor 32 from below the frame 30 is carried out in particular according to the following steps: An operator settles in the lower space 24 under the motor bogie 20 , opposite the central space 75 of the engine 32 concerned; then, by maneuvering from said central space 75, the operator partially unscrews the four fixing rods 80 by actuating the screw heads 82. The operator then positions a lifting table (not shown) under the motor 32, in particular under the body 64 of said motor.

By maneuvering from said central space 75, the operator then extracts the locking pins 90 in the Y direction, as well as the four fixing rods 80 in the X direction.

Then, by means of the lifting table (not shown), the operator moves the motor 32 slightly along X, so that the support surface 68 of said motor is no longer opposite the surface 60 for receiving corresponding. The displacement distance along X is in particular greater than or equal to the dimension 63 of the receiving bands 62 described above.

The motor 32 is thus released from the vertical stop formed by said receiving 60 and bearing 68 surfaces. Said motor is then lowered into the lower space 24 and possibly moved for maintenance operations. It is then reassembled on the frame 30 by a reverse process.

The presence of a clear central space 75, opposite the element 35 for fixing the engine 32 to the chassis 30 and the safety device 36, facilitates work on said engine, in particular from underneath the car. motor 12.

During the manufacture of the motor bogie 20, before assembly with the motor car 12, it is possible to assemble the motor 32 to the frame from above said frame, which is more easily accessible.

Claims (9)

1. A motor bogie (20) for a railway vehicle (10), comprising: a frame (30) extending in a horizontal longitudinal direction (X) corresponding to a direction of travel of the vehicle; a motor (32); and a transmission device (34), capable of being rotated with respect to the frame, about a horizontal axis (65) perpendicular to the longitudinal direction;

   the motor bogie further comprising a first attachment rod (80), the motor and the chassis being adapted to be attached to each other in an assembled configuration by said first attachment rod;

   the frame comprising a first (44, 48) and a second (46, 50) mounting bracket spaced apart in a horizontal transverse direction (Y); the motor comprising a first and a second mounting area (66), able to come into contact with the first and the second mounting bracket respectively in the assembled configuration; the first mounting rod being intended to pass through the first mounting bracket and the second mounting area in the assembled configuration;

   the motor bogie being configured so that, in the assembled configuration, a central space (75) connecting a top face and a bottom face of the chassis (30) is provided between the first and second mounting brackets;

   the motor bogie being characterised in that it further comprises a first member (84) for locking the motor and the chassis; the first locking member comprising: a first (86) and a second (88) locking aperture, respectively carried by the chassis and by the motor; and a locking pin (90), capable of sliding in said first and second apertures.
2. A motor bogie according to claim 1, wherein: the transmission device (34) comprises a reaction rod (76), said rod being offset from the motor (32) in the transverse direction (Y); and the chassis comprises a rod attachment (78), disposed between said rod and said motor in said transverse direction, the attachment (78) preferably being integrated with one of the fixing lugs (44, 50) of the motor (32).
3. A motor bogie as claimed in claim 1 or 2, wherein the frame and motor comprise first (60) and second (68) substantially horizontal surfaces respectively, such that in the assembled configuration said first and second surfaces contact each other and face upwards and downwards respectively.
4. A motor bogie according to claim 3, wherein a dimension (63) of the first (60) and/or second (68) surfaces in the longitudinal direction (X) is between 8 and 25 mm.
5. A motor bogie according to any of the preceding claims, further comprising a second attachment rod (80), intended to pass through the second leg and attachment area in the assembled configuration.
6. A motor bogie according to any of the preceding claims, wherein the locking pin (90) is adapted to slide in the first (86) and second (88) openings in a direction (Y) perpendicular to the first fixing rod (80).
7. A motor bogie according to any of the preceding claims, wherein the second locking aperture (88) is provided in an area (92) of the motor, said area being adjacent the central space (75).
8. A motor bogie according to any of the preceding claims, wherein: the first locking aperture (86) of the first locking member is carried by the first attachment bracket (44, 50); and the motor bogie further comprises a second motor and chassis locking member (84) carried by the second attachment bracket (46, 48).
9. A railway vehicle (10, 12) comprising a body (16), wheels (18) rotatable relative to the body; and at least one motor bogie (20) according to any of the preceding claims, adapted to drive the wheels; said motor bogie being disposed adjacent to a lower space (24) located under the body.

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