JP2012121505A - Truck for railway vehicle and railway vehicle using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a truck for a railway vehicle and the railway vehicle using it, having an advantage of realizing a floor in form of a connection structure, which is lower than an axle containing a connection frame between right and left axle boxes and a synchronous rotary shaft.SOLUTION: The truck for the railway vehicle includes a portal synchronous rotation system 7 connected via a gear mechanism 6 by axles 3, 4 of wheels 1, 2 on the right and left ends and synchronous rotary shafts 5 which is lower than thereof. The axles 3, 4 of the wheels 1, 2 and right and left ends of the synchronous rotary shaft 5 are born at a side corresponding to axle boxes 8, 9 on the right and left and are connected with each other by the gear mechanism 6. An interval between the axle boxes 8, 9 is connected on the inside of the wheels 1, 2 and in position below the 3, 4 by the connection frame 11. A plurality of synchronous rotary shafts 5 are provided around the axle axis. The gear mechanism 6 is formed of connection gears 12, 13 provided at each right and left end of the plurality of synchronous rotary shafts 5, a connection gear 14 on the axle 3 on the left side, in which each left side connection gears 12, 12 are engaged from front and rear, and a connection gear 15 on the axle 4 on the right side, in which each right side connection gears 13, 13 are engaged from front and rear. In this manner, the problem is solved.

Description

  The present invention relates to a railcar bogie, and more specifically, a frame having a left and right side beam supported by an axle box by four wheels on the front and rear left and right sides and a connecting portion at a position lower than the axle between the side beams. The present invention relates to a low-floor railway vehicle carriage and a railway vehicle using the same.

  Such a railcar bogie is known, for example, from Patent Document 1 below. Patent Document 1 has a frame having left and right side beams supported by four wheels on the front and rear sides via an axle box and a primary suspension, and having a connecting portion at a position lower than the axle between the side beams. Discloses a low-floor railway vehicle carriage that supports a vehicle body on a side beam via a secondary suspension and a railway vehicle using the same.

  On the other hand, in Patent Document 2 described below, the left and right axle boxes are connected by a connecting frame lower than the axle, and a rotation synchronizing shaft lower than the axle is passed between the left and right axle boxes separately from each other. By connecting each end of the rotation synchronization shaft to the corresponding left and right wheel axles in the box, it supports low flooring and supports the bogie frame via the primary suspension on each axle box. Discloses a railway carriage that supports the vehicle body via a secondary suspension.

JP 2006-142987 A JP 2004-276730 A

  However, the cart having independent wheels disclosed in Patent Document 1 is driven by one rail because the left and right wheels rotate independently and the restoring force does not work regardless of whether the cart is a driving cart or a non-driving cart without a motor. Wheel flanges and rail shoulders tend to wear out.

  In the cart that connects the left and right wheels with the synchronous rotating shaft disclosed in Patent Literature 2, problems such as the cart disclosed in Patent Literature 1 are avoided. However, between the left and right axle boxes, there are two frames that straddle the left and right wheels and one synchronous rotating shaft, respectively. Maintenance for adhesion of dirt and dirt becomes troublesome. Further, since the frame is divided with the synchronous rotation shaft interposed therebetween, it is difficult to increase the connection strength between the left and right axle boxes.

  In view of such a problem, the present invention uses a railcar bogie that makes the form of a connecting structure lower than the axle including the connecting frame between the left and right axle boxes and the synchronous rotating shaft advantageous for lowering the floor, and the same. The purpose is to provide a railway vehicle.

  In order to achieve the above-described object, the railway vehicle carriage according to the present invention includes a portal-type synchronous rotation system that is connected to each axle of the left and right wheel pairs and a synchronous rotation shaft lower than these axles via a gear mechanism. Bearing the left and right ends of the pair of left and right wheels and the left and right ends of the synchronous rotation shaft on the corresponding sides of the left and right axle boxes, and connecting them with a gear mechanism. A plurality of synchronous rotating shafts are provided around the axle axis, and a gear mechanism is provided at each of left and right ends of the plurality of synchronous rotating shafts. And a connection gear on the left axle where the left connection gears mesh with each other from the front and back, and a connection gear on the right axle where the right connection gears mesh with each other from the front and rear.

  In such a configuration, the left and right wheel pair axles and the left and right ends of the synchronous rotating shafts lower than the axles are supported on the corresponding sides of the left and right axle boxes, and both are gear mechanisms. In order to allow the left and right wheel pairs to rotate synchronously, the connecting gear and the synchronous rotating shaft are around the axle axis, and a plurality of necessary transmission torques can be shared.

  In the above, the axle box further includes, on the inner side of the wheel, a sub-bearing portion that cooperates with a gear mechanism for coupling the axle and the synchronous rotating shaft to each other, and a double-structure portion from the sub-bearing portion to the axle. And having a main bearing portion that penetrates the wheel to the outer surface side and is supported by the double structure portion with the connection between the projection from the double structure portion of the axle and the wheel.

  In such a configuration, in addition to the above, the axle box further secures a necessary volume corresponding to the support strength of the axle and the wheel without overhanging the inside of the wheel by the main bearing portion penetrating the wheel, and the auxiliary bearing portion. The base frame of the support and the auxiliary bearing portion inside the wheel can support the carriage frame via the primary suspension to the gear mechanism and a small bulk inside the wheel only for connection.

  In the above, the connecting frame may be hollow and accommodate a synchronous rotating shaft.

  In such a configuration, in addition to the above, the synchronous rotating shaft and the connecting frame can be simplified as a double structure, and the connecting frame is not divided by the synchronous rotating shaft and has a hollow box structure. The connection strength can be increased.

  Any one of the above-mentioned bogies for rail vehicles supports the bogie frame via the primary suspension inside the wheel by the axle box, and supports the vehicle body via the secondary suspension on the bogie frame. A rail vehicle is also provided.

  Further objects and features of the present invention will become apparent from the following detailed description and drawings. It can be employed in various combinations alone or in combination as much as possible.

  According to the railcar bogie of the present invention, the portal-type synchronous rotation system connected via the gear mechanism with the respective axles of the left and right wheel pairs and the synchronous rotation shafts lower than these axles is lower than the axle of the railcar. Corresponding to the flooring, the left and right wheel pair is rotated synchronously to move the left and right wheels centered on a straight road due to the gradient of the tread, and is pushed outside the curved road by the centrifugal force on the curved road. The required transmission torque is shared by the synchronous rotation system that secures the function of smoothly passing through the curved road by obtaining the difference in diameter between the inner and outer wheels due to Therefore, it is easy to cope with low flooring by arranging the low-volume synchronous rotation system in accordance with the dead space.

  In addition to the above, the axle box is supported by the wheel and the axle together with the auxiliary bearing portion by securing the necessary volume corresponding to the support strength without stretching inside the wheel at the main bearing portion penetrating the wheel, and the gear mechanism. In addition, by supporting the carriage frame via the primary suspension at the auxiliary bearing part inside the small bulky wheel inside the wheel only for the connection, the low floor width can be increased.

  In addition to the above, the dual structure in which the synchronous rotating shaft is housed in the connecting frame simplifies the form of the synchronous rotating system, which simplifies maintenance for adhesion of snow, dirt, dirt, etc. The connection strength between the left and right axle boxes can be increased by not being divided by the synchronous rotating shaft and by having a hollow box structure.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal front view showing a specific example of a railway vehicle carriage according to an embodiment of the present invention in a state where it is used for a rail vehicle in left and right wheel pair units, and a bottom view in the same wheel pair unit. It is a side view of the cart in the wheel pair unit. It is a top view which shows the low floor part of the whole trolley | bogie and a rail vehicle using the same trolley | bogie. It is sectional drawing which shows the low floor part of a rail vehicle for a part of trolley | bogie of another example which concerns on embodiment of this invention, and the schematic diagram which shows two modifications of the drive mechanism part of the trolley separately.

  Hereinafter, several specific examples of a railway vehicle bogie according to an embodiment of the present invention and a railway vehicle using the same will be described in detail with reference to FIGS. The following description is a specific example of the present invention, and does not limit the matters described in the claims.

  The railcar bogie according to the present embodiment includes the axles 3 and 4 of the left and right wheels 1 and 2 and the axles 3 and 4 as shown in the examples shown in FIGS. A gate-type synchronous rotation system 7 connected via a gear mechanism 6 with a lower synchronous rotation shaft 5 is also provided. The left and right wheels 1 and 2 of the pair of axles 3 and 4 and the left and right ends of the synchronous rotating shaft 5 are supported on the corresponding sides of the left and right axle boxes 8 and 9, and both are connected by the gear mechanism 6. Yes. At the same time, the left and right axle boxes 8 and 9 are connected to each other by the connecting frame 11 at positions inside the left and right wheels 1 and 2 and below the axles 3 and 4.

  In the railcar bogie 100 according to the present embodiment having such a basic structure, in particular, there are a plurality of synchronous rotating shafts 5 around the axle axis as shown in FIG. 1B and FIG. The gear mechanism 6 includes a connecting gears 12 and 13 provided at left and right ends of the plurality of synchronous rotating shafts 5 and a connecting gear on the left axle 3 in which the left connecting gears 12 and 12 are engaged from the front and rear. 14 and a connection gear 15 on the right axle 4 in which the right connection gears 13 and 13 mesh with each other from the front and rear.

  As a result, the left and right wheels 1 and 2 of the pair of axles 3 and 4 and the left and right ends of the synchronous rotating shaft 5 that are lower than the axles are connected to the corresponding sides of the left and right axle boxes 8 and 9. It is necessary to connect both gears 6 with the gear mechanism 6 so that the left and right wheels 1 and 2 can be rotated synchronously with the connecting gears 12 and 13 and the synchronous rotating shaft 5 around the axle axis. A plurality of transmission torques can be shared.

  Therefore, the portal-type synchronous rotation system 7 connected through the gear mechanism 6 with the axles 3 and 4 of the pair of left and right wheels 1 and 2 and the synchronous rotation shaft 5 lower than these axles 3 and 4, FIG. In response to the lower floor where the floor 21 of the railcar 200 is lower than the axles 3 and 4 as shown in the figure, a straight road due to the gradient of the tread surface by synchronously rotating the left and right wheels 1 and 2 The function is that the left and right wheels 1 and 2 are centered at the time of traveling, the diameter difference between the inner and outer wheels is obtained by being pushed outward by the centrifugal force on the curved road, and the curved road can be passed smoothly. The necessary transmission torque is shared by the portal-type synchronous rotation system 7 in which a plurality of left and right wheels 1 and 2 are arranged around the axle axis, and the low-volume portal-type synchronous rotation system 7 is adjusted to the dead space. It is easy to cope with low flooring as an array.

  The examples shown in FIGS. 1 to 3 will be described in more detail. The left and right axle boxes 8 and 9 are located inside the left and right wheels 1 and 2 as shown in FIGS. 4 is supported by a bearing 22 so as to be positioned in the front and rear of the vehicle body 23, and the left and right axle boxes 8 and 9 are connected to the left and right side beams 24 a of the carriage frame 24 via the primary suspension 25 before and after the vehicle body 23. , 24b is supported. The vehicle body 23 is supported on the side beams 24a and 24b of the carriage frame 24 via the secondary suspension 26 as shown in FIGS. Can be configured.

  Such a railcar bogie 100 can be a non-driving bogie, but is a driving bogie in the examples shown in FIGS. Various types of driving methods may be adopted, but in the example shown in FIG. 3, the left and right wheels 1 and 2 in the front part and the left and right wheels 1 and 2 in the rear part are driven by individual electric motors 31 and 32. It is like that. Specifically, the front wheels 1 and 2 are connected to the axle 3 of the left wheel 1 by a bevel gear mechanism 33, and the rear wheels 1 and 2 are connected to the right side by a bevel gear mechanism 33. An electric motor 32 installed outside the beam 24 b is connected to the axle 4 of the right wheel 2 by a bevel gear mechanism 34, and a caliper brake mechanism 35 is operated at the outer ends of the axles 3 and 4.

  The railway car bogie 100 shown in FIG. 4 will be described in further detail. The axle boxes 8 and 9 are arranged on the inner sides of the left and right wheels 1 and 2 as representatively shown on the left side in FIG. Auxiliary bearing portions 8a and 9a cooperating with a gear mechanism 6 for connecting the axles 3 and 4 and the synchronous rotating shaft 5 to each other, and a dual structure portion of the auxiliary bearing portions 8a and 9a with the axles 3 and 4 41, the left and right wheels 1 and 2 are penetrated to the outer surface side, and the shaft 53 having the flange of the connecting gear 14 (15) and the left and right wheels 1 and 2 are connected.

  As a result, the axle boxes 8 and 9 are formed on the axles 3 and 4 and the wheels 1 and 2 without projecting inside the left and right wheels 1 and 2 by the main bearing portions 8b and 9b penetrating the left and right wheels 1 and 2. It is supported together with the auxiliary bearing portions 8a and 9a while securing a necessary volume corresponding to the supporting strength. The auxiliary bearing portions 8a and 9a inside the wheels 1 and 2 are used only for the gear mechanism 6 and connection therewith. The bogie frame 24 can be supported via the primary suspension 25 on the small bulkiness inside the wheels 1 and 2.

  Therefore, the main bearing portions 8b and 9b through which the axle boxes 8 and 9 penetrate the wheels 1 and 2 ensure a necessary volume corresponding to the support strength without being stretched inside the wheels 1 and 2, and the auxiliary bearing portions 8a and 9a. In addition, supported by the wheels 1 and 2 and the axles 3 and 4, the gear mechanism 6 and the auxiliary bearing portions 8 a and 9 a inside the small and bulky wheels 1 and 2 inside the wheels 1 and 2 only for connection therewith. Thus, the bogie frame 24 is supported via the primary suspension 25, and the low floor width can be increased. The railcar bogie 100 of the present example can also constitute the railcar 200 with an unillustrated traction connecting portion as an essential component by supporting the vehicle body 23 on the bogie frame 24 via the secondary suspension 26.

  In order to realize the bearing structure as described above, in the illustrated example, both side portions of the connecting gears 14 and 15 of the axles 3 and 4 are supported by the bearings 51 in the auxiliary bearing portions 8a and 9a, and the connecting gear 12 of the synchronous rotating shaft 5 is provided. , 13 are supported in both radial and thrust directions by bearings 52. Further, the outer ends of the axles 3 and 4 are integrally connected by a shaft 53 having a flange of the connection gear 14 (15). Between the inner periphery of the wheel 1 (2) and the outer periphery of the double structure portion 41, a bearing 54 is used for bearing in both radial and thrust directions. Further, the rotation from the electric motor 57 is transmitted through the spur gear train 58 to the drive shaft 56 connected to the outer surfaces of the wheels 1 and 2 by a flexure joint 55 to drive the wheels 1 and 2. The rotation of the electric motor 57 may be transmitted through the bevel gear mechanism 59 as shown in FIG. 4B, or may be transmitted through the planetary gear mechanism 61 as shown in FIG. .

  Note that, in common with the examples shown in FIGS. 1 to 3 and the example shown in FIG. 4, the connecting frame 11 is hollow and accommodates the synchronous rotating shaft 5. Thereby, the synchronous rotating shaft 5 and the connecting frame 11 can be simplified in form as a double structure, and the connecting frame 11 is not divided by the synchronous rotating shaft 5 and has a hollow box structure. Enhanced.

  Accordingly, the double-type structure in which the synchronous rotating shaft 5 is accommodated in the connecting frame 11 simplifies the form of the gate-type synchronous rotating system 7, which simplifies maintenance for adhesion of snow, dirt, dirt, etc. Since the frame 11 is not divided by the synchronous rotating shaft 5 and has a hollow box structure, the connection strength between the left and right shaft boxes can be increased, and sufficient durability and stable running performance can be guaranteed.

  INDUSTRIAL APPLICABILITY The present invention can be put to practical use in a railcar bogie, because a connecting structure lower than the connecting frame between the left and right axle boxes and the axle including the synchronous rotating shaft is low in volume and is advantageously configured to lower the floor.

DESCRIPTION OF SYMBOLS 100 Rail vehicle bogie 200 Rail vehicle 21 Floor 23 Car body 2 Wheel 4 Axle 5 Synchronous rotating shaft 6 Gear mechanism 7 Portal synchronous rotating system 8, 9 Shaft box 8a, 9a Sub bearing portion 8b, 9b Main bearing portion 11 Connection frame 12 , 13, 14, 15 Connecting gear 22, 51, 52, 54 Bearing 53 Shaft 41 with flange Double structure

Claims (4)

Each of the left and right wheel pairs is equipped with a portal-type synchronous rotation system connected via a gear mechanism with a synchronous rotation shaft lower than these axles, and each axle of the left and right wheel pairs and the left and right ends of the synchronous rotation shaft, This is a railway vehicle bogie in which the left and right axle boxes are bearing on the corresponding sides and both are connected by a gear mechanism, and the left and right axle boxes are connected by a connecting frame inside the left and right wheels and below the axle. And
A plurality of synchronous rotating shafts are provided around the axle axis, and a gear mechanism is provided on the left axle where the connecting gears provided at the left and right ends of the plurality of synchronous rotating shafts and the left connecting gears mesh with each other from the front and rear. A railcar bogie comprising a connecting gear and a connecting gear on a right axle in which each right connecting gear meshes from front to back.   The axle box has a sub-bearing portion that cooperates with a gear mechanism for connecting the axle and the synchronous rotating shaft to each other inside the wheel, and a double structure portion from the auxiliary bearing portion to the axle. The bogie for a railway vehicle according to claim 1, further comprising a main bearing portion that penetrates to the outer surface side and is bearing by a double structure portion with connection between a synchronous rotating shaft and a wheel.   The railcar bogie according to any one of claims 1 and 2, wherein the connecting frame is hollow and accommodates a synchronous rotating shaft.   A railcar bogie according to any one of claims 1 to 3, wherein the bogie frame is supported by the axle box via a first suspension on the inside of the wheel, and a second suspension is mounted on the bogie frame. A railway vehicle characterized in that the vehicle body is supported via