JP7617429B2 - Railroad car bogies - Google Patents

Description

This disclosure relates to bogies for railway vehicles.

A railway vehicle comprises a bogie and a car body supported on the bogie. When a railway vehicle runs on rails, the wheels wear out. When the wheels become significantly worn, the tread shape becomes distorted. In this case, the wheels are re-ground to return the tread shape to its normal state. When the wheels are re-ground, the wheel diameter becomes smaller, and the height of the car body decreases. For this reason, it is necessary to adjust the height of the car body in a timely manner in accordance with the amount of wheel re-grounding.

For example, Patent Document 1 describes a method of adjusting the height of the car body by adjusting the height of the air spring relative to the bogie. In the method described in Patent Document 1, a liner is inserted between the underside of the air spring and the bogie frame, or an already installed liner is pulled out.

JP 2002-347619 A

Car body height adjustment using liners is usually performed with the car body lifted from the bogie. Lifting the car body from the bogie requires large-scale equipment equipped with car body jacks, which is extremely time-consuming. On the other hand, wheel grinding can be performed with the car body placed on the bogie. The amount of wheel grinding required per time is not so large that it requires car body height adjustment. For this reason, car body height adjustment using liners is often performed in conjunction with a comprehensive inspection of the railway vehicle, rather than every time a wheel is grinded.

Here, wheel grinding is carried out once or twice a year. Comprehensive inspections of railway vehicles are carried out once every four years. This means that when the car body height is adjusted during a comprehensive inspection of the railway vehicle, the wheels have already been ground several times, and the car body height has been significantly reduced from its initial height. In other words, the amount of reduction in car body height during the period between comprehensive inspections, i.e., during the normal operation period of the railway vehicle, is large. In this case, a large difference in height occurs between the platform and the car body floor. If the initial height of the car body had been set high, the difference in height would be small at the end of normal operation, but large at the beginning of normal operation. This creates problems with barrier-free access.

If it were possible to easily adjust the vehicle height using liners, it would be possible to adjust the vehicle height appropriately each time the wheels were ground. Therefore, it would be sufficient if the vehicle height adjustment using liners could be performed while the vehicle was in place. For example, Patent Document 1 describes a method of adjusting the vehicle height while the vehicle was in place. However, Patent Document 1 performs vehicle height adjustment using liners for air springs, and does not anticipate vehicle height adjustment for the center pan or side supports.

The objective of this disclosure is to provide a bogie that allows for easy adjustment of the car body height using liners at the center plate or side support while the car body is placed on the bogie.

The bogie for a railway vehicle according to the present disclosure includes a left rib, a right rib, a cross rib, a bolster, a core plate, a central lower plate, a central upper plate, and a core plate liner. Each of the left rib and the right rib extends in the front-rear direction. The cross rib extends in the left-right direction and is joined to the left rib and the right rib. The bolster extends in the left-right direction. The core plate supports a center portion of the bolster. The central lower plate is disposed below the core plate and is fixed to the cross rib. The central lower plate has an attachment portion to which a push-up device can be attached. The push-up device includes a rod that can be extended and contracted in the up-down direction. The central upper plate is disposed between the core plate and the central lower plate and is fixed to the cross rib. An opening is formed in the central upper plate above the attachment portion of the central lower plate. The core plate liner is inserted between the core plate and the central upper plate.

Another bogie for a railway vehicle according to the present disclosure includes a left rib, a right rib, a cross rib, a bolster, a left support, a right support, a left lower plate, a left upper plate, a left support liner, a right lower plate, a right upper plate, and a right support liner. Each of the left and right ribs extends in the front-rear direction. The cross rib extends in the left-right direction and is joined to the left and right ribs. The bolster extends in the left-right direction. The left support supports the left end of the bolster. The right support supports the right end of the bolster. The left lower plate is disposed below the left support and fixed to the left rib. The left lower plate has an attachment portion to which a push-up device including a rod that can be extended and contracted in the up-down direction can be attached. The left upper plate is disposed between the left support and the left lower plate and fixed to the left rib. An opening is formed in the left upper plate above the attachment portion of the left lower plate. The left support liner is inserted between the left support and the left upper plate. The right lower plate is disposed below the right support and fixed to the right burr. The right lower plate has an attachment portion to which a push-up device including a rod that can extend and retract in the vertical direction can be attached. The right upper plate is disposed between the right support and the right lower plate and fixed to the right burr. The right upper plate has an opening formed above the attachment portion of the right lower plate. The right support liner is inserted between the right support and the right upper plate.

The bogie disclosed herein allows for easy adjustment of the car body height using liners at the center plate or side support while the car body is placed on the bogie.

FIG. 1 is a schematic diagram showing the overall configuration of a railway vehicle equipped with a bogie according to a first embodiment. FIG. 2 is a top view of the bogie frame in the bogie of the first embodiment. FIG. 3 is a cross-sectional view of the bogie of the first embodiment. FIG. 4A is a cross-sectional view showing an initial state of a carbody height adjustment operation of a railway vehicle equipped with the bogie according to the first embodiment. FIG. 4B is a cross-sectional view showing a state during the body height adjustment work. FIG. 4C is a cross-sectional view showing a state when the vehicle body height adjustment work is completed. FIG. 5 is a cross-sectional view showing a state during the body height adjustment work. FIG. 6 is a top view of the bogie frame in the bogie of the second embodiment. FIG. 7 is a top view of the bogie frame in the bogie of the third embodiment.

The bogie for a railway vehicle according to this embodiment includes a left rib, a right rib, a cross rib, a bolster, a core plate, a central lower plate, a central upper plate, and a core plate liner. The left rib and the right rib each extend in the front-rear direction. The cross rib extends in the left-right direction and is joined to the left rib and the right rib. The bolster extends in the left-right direction. The core plate supports the center of the bolster. The central lower plate is disposed below the core plate and is fixed to the cross rib. The central lower plate has an attachment portion to which a push-up device can be attached. The push-up device includes a rod that can be extended and contracted in the up-down direction. The central upper plate is disposed between the core plate and the central lower plate and is fixed to the cross rib. An opening is formed in the central upper plate above the attachment portion of the central lower plate. The core plate liner is inserted between the core plate and the central upper plate (first configuration).

According to the bogie of the first configuration, it is possible to attach the lifting device to the mounting portion of the central lower plate in the existing state. The central upper plate has an opening formed above the mounting portion of the central lower plate. Therefore, when the lifting device is attached to the central lower plate, the rod of the lifting device can be inserted through the opening and extended upward. When the lifting device is activated, the rod lifts the core plate located above the central upper plate together with the car body. When the car body is lifted by the lifting device, the gap between the core plate and the central upper plate widens. This allows the core plate liner to be inserted between the core plate and the central upper plate. At this time, if a core plate liner is already installed between the core plate and the central upper plate, an additional core plate liner can be inserted. It is also possible to pull out the core plate liner already installed between the core plate and the central upper plate. In such a car body height adjustment using the core plate liner, no large-scale equipment is required to lift the car body from the bogie. Therefore, the car body height adjustment using the core plate liner can be easily performed in the existing state with the car body placed on the bogie.

There is no particular limitation on the shape of the opening, so long as the opening penetrates the central upper plate. In a typical example, the opening is a hole. The opening may also be a notch.

In the first configuration of the trolley, the core plate liner may be divided into two and consist of a first core plate liner and a second core plate liner (second configuration).

If the core plate liner is divided into two, as in the second configuration of the trolley, an opening can be provided between the first core plate liner and the second core plate liner. Then, when the push-up device is attached to the central lower plate, the rod inserted through the opening will not interfere with the first core plate liner and the second core plate liner.

In a typical example of a bogie with the second configuration, the opening is located at the center of the central upper plate in the fore-and-aft direction. In this case, the first core plate liner and the second core plate liner are arranged to sandwich the opening in the fore-and-aft direction (third configuration). The first core plate liner and the second core plate liner can evenly support the core plate in the fore-and-aft direction after the car body height has been adjusted.

In the third configuration of the trolley, the first core plate liner and the second core plate liner preferably have shapes that are symmetrical to each other in the front-to-rear direction (fourth configuration). In this case, the first core plate liner and the second core plate liner can be used in common. In this case, it is sufficient to manufacture one type of core plate liner for the first core plate liner and the second core plate liner. This makes it easier to manufacture and manage the core plate liners.

In the bogie of the third or fourth configuration, the opening is preferably composed of two openings, and the two openings are arranged at a distance from each other in the left-right direction (fifth configuration). By providing the two openings at a distance from each other in the left-right direction, it is possible to lift the core plate evenly in the left-right direction using two lifting devices. Therefore, the core plate is kept in a stable raised state while the car body height is being adjusted by the core plate liner.

In another typical example of the second configuration of the bogie, the opening is located at the left-right center of the central upper plate. In this case, the first core plate liner and the second core plate liner are arranged so as to sandwich the opening in the left-right direction (sixth configuration). The first core plate liner and the second core plate liner can support the core plate evenly in the left-right direction after the car body height has been adjusted.

In the sixth configuration of the trolley, the first core plate liner and the second core plate liner preferably have shapes that are symmetrical to each other in the left-right direction (seventh configuration). In this case, the first core plate liner and the second core plate liner can be used in common with each other. In this case, it is sufficient to manufacture one type of core plate liner for the first core plate liner and the second core plate liner. This makes it easier to manufacture and manage the core plate liners.

In the bogie of the sixth or seventh configuration, the opening is preferably composed of two openings, and the two openings are arranged at a distance from each other in the fore-and-aft direction (eighth configuration). By providing two openings at a distance in the fore-and-aft direction, it becomes possible to lift the core plate evenly in the fore-and-aft direction using two lifting devices. Therefore, the core plate is kept in a stable raised state while the car body height is being adjusted by the core plate liner.

The bogie for a railway vehicle according to this embodiment includes a left rib, a right rib, a cross rib, a bolster, a left support, a right support, a left lower plate, a left upper plate, a left support liner, a right lower plate, a right upper plate, and a right support liner. The left and right ribs each extend in the front-rear direction. The cross rib extends in the left-right direction and is joined to the left and right ribs. The bolster extends in the left-right direction. The left support supports the left end of the bolster. The right support supports the right end of the bolster. The left lower plate is disposed below the left support and fixed to the left rib. The left lower plate has an attachment portion to which a push-up device including a rod that is extendable in the up-down direction can be attached. The left upper plate is disposed between the left support and the left lower plate and fixed to the left rib. An opening is formed in the left upper plate above the attachment portion of the left lower plate. The left support liner is inserted between the left support and the left upper plate. The right lower plate is disposed below the right support and fixed to the right burr. The right lower plate has an attachment portion to which a push-up device including a rod that can extend and retract in the vertical direction can be attached. The right upper plate is disposed between the right support and the right lower plate and fixed to the right burr. An opening is formed in the right upper plate above the attachment portion of the right lower plate. The right support liner is inserted between the right support and the right upper plate (ninth configuration).

According to the bogie of the ninth configuration, the lifting device can be attached to the mounting portion of the left lower plate in the existing state. An opening is formed in the left upper plate above the mounting portion of the left lower plate. Therefore, when the lifting device is attached to the left lower plate, the rod of the lifting device can be inserted through the opening and extended upward. When the lifting device is activated, the rod lifts the left support located above the left upper plate together with the car body. When the car body is lifted by the lifting device, the gap between the left support and the left upper plate widens. This allows the left support liner to be inserted between the left support and the left upper plate. At this time, if a left support liner is already installed between the left support and the left upper plate, an additional left support liner can be inserted. Also, the left support liner already installed between the left support and the left upper plate can be pulled out. Such car body height adjustment using the left support liner in the left support can be performed in the right support in the same way. In such car body height adjustment using the left support liner and the right support liner, no large-scale equipment is required to lift the car body from the bogie. Therefore, the left and right support liners can be used to easily adjust the vehicle height while the vehicle is still mounted on the bogie.

The opening formed in the left upper plate penetrates the left upper plate. The opening formed in the right upper plate penetrates the right upper plate. The shapes of these openings are not particularly limited, and in a typical example, the openings are holes. The openings may also be cutouts.

Specific examples of the bogies of each embodiment will be described below with reference to the drawings. The same or equivalent parts in the drawings will be given the same reference numerals and their description will not be repeated.

[First embodiment]
[Cart configuration]
Fig. 1 is a schematic diagram showing the overall configuration of a railway vehicle 1 equipped with a bogie 10 for a railway vehicle according to this embodiment. Fig. 1 shows the railway vehicle 1 as viewed along the direction of travel. In this specification, the direction of travel of the railway vehicle 1 is referred to as the front-rear direction, the width direction of the railway vehicle 1 is referred to as the left-right direction, and the height direction of the railway vehicle 1 is referred to as the up-down direction.

Referring to FIG. 1, the railway vehicle 1 comprises a car body 2 and a bogie 10. The bogie 10 comprises a bolster 20, a bogie frame 30, and a pair of wheels 40 on the left and right. The car body 2 is supported by the bolster 20 via a pair of air springs 3 on the left and right. The bolster 20 extends in the left-right direction. The pair of air springs 3 are provided at both ends of the bolster 20, respectively.

A pair of wheels 40 are fixed to both ends of an axle 41 that extends in the left-right direction. The pair of wheels 40 and the axle 41 form a wheel set. The wheel set is disposed at the front end and rear end of the bogie frame 30. An axle box 42 is disposed at both ends of the axle 41 of each wheel set. The axle 41 is rotatably supported by bearings (not shown) provided in the axle box 42. The bogie frame 30 is supported by the axle box 42 via an axle spring 43.

The bogie 10 includes a core plate 50, a left support 60, and a right support 70 between the bolster 20 and the bogie frame 30. The bolster 20 is supported by the bogie frame 30 via the core plate 50, the left support 60, and the right support 70. The core plate 50 supports the center of the bolster 20. The left support 60 supports the left end of the bolster 20. The right support 70 supports the right end of the bolster 20.

A core plate liner 51 is provided between the core plate 50 and the bogie frame 30. A left side support liner 61 is provided between the left side support 60 and the bogie frame 30. A right side support liner 71 is provided between the right side support 70 and the bogie frame 30. Each of the core plate liner 51, the left side support liner 61, and the right side support liner 71 is used to adjust the car body height of the railway vehicle 1. Each of the liners 51, 61, and 71 is, for example, a steel plate. A specific method for adjusting the car body height will be described later.

2 is a top view of the bogie frame 30 of the bogie 10 of this embodiment. In FIG. 2, the positions of the core plate liner 51, the left support liner 61, and the right support liner 71 provided above the bogie frame 30 are indicated by dashed lines. The bogie frame 30 includes a left beam 31, a right beam 32, and a cross beam 33. The left beam 31 and the right beam 32 each extend in the front-rear direction. The cross beam 33 extends in the left-right direction and is joined to the left beam 31 and the right beam 32. Specifically, the cross beam 33 is disposed in the center in the front-rear direction. The left end of the cross beam 33 is joined to the inner side surface (right side surface) of the left beam 31 by welding, for example, and the right end of the cross beam 33 is joined to the inner side surface (left side surface) of the right beam 32 by welding, for example. In the example of this embodiment, two cross beams 33 are provided side by side in the front-rear direction.

Between the two cross beams 33, a central upper plate 34 for supporting the core plate 50 is provided. The central upper plate 34 is disposed in the center of the two cross beams 33 in the left-right direction and is fixed to the two cross beams 33. An opening is formed in the central upper plate 34. In this embodiment, the central upper plate 34 has two holes 341 formed as openings. The two holes 341 are disposed at a distance from each other in the left-right direction. Each of the two holes 341 is located at the center of the central upper plate 34 in the front-rear direction. However, the number of openings provided in the central upper plate 34 is not limited to this. For example, one hole 341 may be provided near the center of the central upper plate 34.

The core plate liner 51 is divided into two. That is, the core plate liner 51 is composed of a first core plate liner 511 and a second core plate liner 512. The first core plate liner 511 and the second core plate liner 512 have shapes that are symmetrical to each other in the front-to-back direction. The first core plate liner 511 is arranged in front of the two hole portions 341. The second core plate liner 512 is arranged behind the two hole portions 341. In short, the first core plate liner 511 and the second core plate liner 512 are arranged so as to sandwich the two hole portions 341 in the front-to-back direction.

A left upper plate 36 for supporting the left support 60 is provided on the outer side surface (left side surface) of the left rib 31. The left upper plate 36 is disposed in the center of the left rib 31 in the front-to-rear direction and is fixed to the left rib 31. An opening is formed in the left upper plate 36. In this embodiment, the left upper plate 36 has two holes 361 formed as openings. The two holes 361 are disposed at a distance from each other in the front-to-rear direction. Each of the two holes 361 is located in the center of the left upper plate 36 in the left-to-right direction. The left support liner 61 is disposed between the two holes 361.

A right upper plate 38 for supporting the right support 70 is provided on the outer side surface (right side surface) of the right rib 32. The right upper plate 38 is disposed in the center of the right rib 32 in the front-to-rear direction and is fixed to the right rib 32. An opening is formed in the right upper plate 38. In this embodiment, the right upper plate 38 has two holes 381 formed as openings. The two holes 381 are disposed at a distance from each other in the front-to-rear direction. Each of the two holes 381 is located in the center of the right upper plate 38 in the left-to-right direction. The right support liner 71 is disposed between the two holes 381.

Figure 3 is a cross-sectional view of the trolley 10. In this specification, unless otherwise specified, a cross-section refers to a cross-section of the trolley 10 cut along a plane perpendicular to the front-rear direction.

Referring to FIG. 3, the core plate 50 is composed of, from top to bottom, an upper core plate 52, a core plate grinding plate 54, and a lower core plate 53. The upper core plate 52, the core plate grinding plate 54, and the lower core plate 53 are stacked in this order. The upper core plate 52 is fixed to the underside of the center of the bolster 20. The underside of the lower core plate 53 contacts the core plate liner 51. In this embodiment, multiple core plate liners 51 are already arranged between the lower core plate 53 and the central upper plate 34.

The above-mentioned central upper plate 34 is disposed below the core plate 50, and the central lower plate 35 is disposed further below it. In other words, the central lower plate 35 is disposed below the core plate 50, and the central upper plate 34 is disposed between the core plate 50 and the central lower plate 35. The central lower plate 35 faces the central upper plate 34 in the vertical direction. The central lower plate 35 is provided between the two cross beams 33 and is fixed to the center of the two cross beams 33 in the left-right direction. The space between the central upper plate 34 and the central lower plate 35 is open to the outside on both the left and right sides. The central lower plate 35 has an attachment portion 351 to which a push-up device can be attached. In the example of this embodiment, two attachment portions 351 are provided side by side in the left-right direction. Therefore, two push-up devices can be attached to the central lower plate 35. The push-up devices are used for adjusting the height of the car body, which will be described later.

As described above, the central upper plate 34 is disposed between the core plate 50 and the central lower plate 35. Two holes 341 are formed in the central upper plate 34. The holes 341 are located above the mounting portion 351 of the central lower plate 35.

The left side support 60 is composed of, from top to bottom, a left side support portion 62, a left side support rubber 64, and a left side support base 63. The left side support portion 62, the left side support rubber 64, and the left side support base 63 are stacked in this order. The left side support portion 62 is fixed to the underside of the left end portion of the bolster 20. The underside of the left side support base 63 contacts the left side support liner 61. In this embodiment, multiple left side support liners 61 are already arranged between the left side support base 63 and the left side upper plate 36.

The above-mentioned left upper plate 36 is disposed below the left support 60, and the left lower plate 37 is disposed below it. In other words, the left lower plate 37 is disposed below the left support 60, and the left upper plate 36 is disposed between the left support 60 and the left lower plate 37. The left lower plate 37 faces the left upper plate 36 in the vertical direction. The left lower plate 37 is provided on the outer side surface (left side surface) of the left rafter 31, and is fixed to the center of the left rafter 31 in the front-to-rear direction. The space between the left upper plate 36 and the left lower plate 37 is open to the outside on the left side. The left lower plate 37 has an attachment portion 371 to which a push-up device can be attached. The attachment portion 371 is provided, for example, at the center of the left lower plate 37 in the left-right direction.

As described above, the left upper plate 36 is disposed between the left support 60 and the left lower plate 37. A hole 361 is formed in the left upper plate 36. The hole 361 is located above the mounting portion 371 of the left lower plate 37.

The right side support 70 is composed of, from top to bottom, a right side support portion 72, a right side support rubber 74, and a right side support base 73. The right side support portion 72, the right side support rubber 74, and the right side support base 73 are stacked in this order. The right side support portion 72 is fixed to the underside of the right end portion of the bolster 20. The underside of the right side support base 73 contacts the right side support liner 71. In this embodiment, multiple right side support liners 71 are already arranged between the right side support base 73 and the right side upper plate 38.

The above-mentioned right upper plate 38 is disposed below the right support 70, and the right lower plate 39 is disposed below it. In other words, the right lower plate 39 is disposed below the right support 70, and the right upper plate 38 is disposed between the right support 70 and the right lower plate 39. The right lower plate 39 faces the right upper plate 38 in the vertical direction. The right lower plate 39 is provided on the outer side surface (right side surface) of the right beam 32, and is fixed to the center of the right beam 32 in the front-to-rear direction. The space between the right upper plate 38 and the right lower plate 39 opens to the outside on the right side. The right lower plate 39 has an attachment portion 391 to which a push-up device can be attached. The attachment portion 391 is provided, for example, at the center of the right lower plate 39 in the left-right direction.

As described above, the right-side upper plate 38 is disposed between the right-side support 70 and the right-side lower plate 39. A hole 381 is formed in the right-side upper plate 38. The hole 381 is located above the mounting portion 391 of the right-side lower plate 39.

[How to adjust the vehicle height]
4A to 4C, an example of a method for adjusting the carbody height of the railway vehicle 1 using the bogie 10 according to this embodiment will be described below. In this method for adjusting the carbody height, the height of the carbody 2 is adjusted by the center pan liner 51, the left support liner 61, and the right support liner 71 in an existing state.

Figure 4A is a cross-sectional view showing the initial state of the vehicle body height adjustment work. With reference to Figures 2 and 4A, the space between the central upper plate 34 and the central lower plate 35 is open to the outside on both the left and right sides. A push-up device 80 is inserted into the space between the central upper plate 34 and the central lower plate 35 from each opening. The inserted push-up device 80 is attached to the mounting portion 351 of the central lower plate 35. Figure 4A shows the state in which the push-up devices 80 are attached to each of the two mounting portions 351 of the central lower plate 35.

The space between the left upper plate 36 and the left lower plate 37 is open to the outside on the left side. A push-up device 80 is inserted into the space between the left upper plate 36 and the left lower plate 37 through the opening. The inserted push-up device 80 is attached to the mounting portion 371 of the left lower plate 37. In addition, the space between the right upper plate 38 and the right lower plate 39 is open to the outside on the right side. A push-up device 80 is inserted into the space between the right upper plate 38 and the right lower plate 39 through the opening. The inserted push-up device 80 is attached to the mounting portion 391 of the right lower plate 39.

Each push-up device 80 includes a rod 81 that can expand and contract in the vertical direction. The central upper plate 34 has a hole 341 above the push-up device 80 attached to the central lower plate 35. The rod 81 of the push-up device 80 is inserted into the hole 341 and extended upward. The left upper plate 36 has a hole 361 above the push-up device 80 attached to the left lower plate 37. The rod 81 of the push-up device 80 is inserted into the hole 361 and extended upward. The right upper plate 38 has a hole 381 above the push-up device 80 attached to the right lower plate 39. The rod 81 of the push-up device 80 is inserted into the hole 381 and extended upward.

Figure 4B is a cross-sectional view showing the state during the body height adjustment work. By the operation of each lifting device 80, the rod 81 of each lifting device 80 attached to the central lower plate 35 extends, and the tip of the rod 81 abuts the underside of the core plate 50 (lower core plate 53). The rod 81 extends further upward, and the core plate 50 is lifted. The rod 81 of the lifting device 80 attached to the left lower plate 37 extends, and the tip of the rod 81 abuts the underside of the left receiver 60 (left receiver 63). The rod 81 extends further upward, and the left receiver 60 is lifted. The rod 81 of the lifting device 80 attached to the right lower plate 39 extends, and the tip of the rod 81 abuts the underside of the right receiver 70 (right receiver 73). The rod 81 extends further upward, and the right receiver 70 is lifted. This allows the bolster 20 supported by the center plate 50, the left support 60, and the right support 70, and the car body 2 (Figure 1) supported by the bolster 20 to be lifted.

When the bolster 20 is raised, the distance between the core plate 50 and the central upper plate 34 increases. This creates a gap between the lower core plate 53 (core plate 50) and the core plate liner 51 that was already installed on the railway vehicle 1. By inserting a new core plate liner 51 into this gap, the height of the railway vehicle 1 can be increased. Also, by pulling out the already installed core plate liner 51, the height of the railway vehicle 1 can be decreased.

In addition, when the bolster 20 is lifted, the distance between the left side support 60 and the left side upper plate 36 increases. This creates a gap between the left side support base 63 (left side support 60) and the left side support liner 61 that was already installed. By inserting a new left side support liner 61 into this gap, the height of the railway car 1 can be increased. Also, by pulling out the already installed left side support liner 61, the height of the railway car 1 can be decreased.

In addition, when the bolster 20 is raised, the distance between the right side support 70 and the right side upper plate 38 increases. This creates a gap between the right side support base 73 (right side support 70) and the right side support liner 71 that was already installed. By inserting a new right side support liner 71 into this gap, the height of the railway car 1 can be increased. Also, by pulling out the already installed right side support liner 71, the height of the railway car 1 can be decreased.

Figure 4C is a cross-sectional view showing the state when the car body height adjustment work is completed. Here, as an example of the car body height adjustment work, the state when the height of the railway car 1 is raised is shown. Referring to Figure 4C, a new core plate liner 51 is inserted below the lower core plate 53 (core plate 50). In addition, a new left side support liner 61 is inserted below the left side support base 63 (left side support 60). In addition, a new right side support liner 71 is inserted below the right side support base 73 (right side support 70).

After each liner 51, 61, and 71 is inserted, the rod 81 of the push-up device 80 is retracted. Then, each push-up device 80 is removed from the cart 10.

In the above-described method for adjusting the vehicle body height, the center plate liner 51, the left support liner 61, and the right support liner 71 are inserted simultaneously. However, the vehicle body height adjustment work using each liner may be performed separately.

[effect]
According to the bogie 10 of this embodiment, it is possible to attach the push-up devices 80 to the mounting portion 351 of the central lower plate 35, the mounting portion 371 of the left lower plate 37, and the mounting portion 391 of the right lower plate 39, respectively. As described above, when the rod 81 is extended upward by the operation of each push-up device 80, the bolster 20 and the car body 2 can be lifted from the bogie frame 30. In short, in the work of adjusting the car body height of the railway car 1 using the core plate liner 51, the left support liner 61, and the right support liner 71, no large-scale equipment is required to lift the car body 2 from the bogie 10. Therefore, the car body height adjustment using the core plate liner 51, the left support liner 61, and the right support liner 71 can be easily performed in a state in which the car body 2 is placed on the bogie 10.

In this embodiment, the core plate liner 51 is divided into two, and is composed of a first core plate liner 511 and a second core plate liner 512. The two holes 341 in the central upper plate 34 are provided between the first core plate liner 511 and the second core plate liner 512. Therefore, in the push-up device 80 attached to the mounting portion 351 of the central lower plate 35, the rod 81 inserted through the hole 341 does not interfere with the first core plate liner 511 and the second core plate liner 512.

In the bogie 10 of this embodiment, each of the two holes 341 in the central upper plate 34 is located at the center of the central upper plate 34 in the front-rear direction. The first core plate liner 511 and the second core plate liner 512 are arranged to sandwich the two holes 341 in the front-rear direction. With this configuration, the first core plate liner 511 and the second core plate liner 512 can evenly support the core plate 50 in the front-rear direction after the car body height has been adjusted.

In this embodiment, the first core plate liner 511 and the second core plate liner 512 have shapes that are symmetrical to each other in the front-to-rear direction. In this case, the first core plate liner 511 and the second core plate liner 512 can be used in common with each other. In this case, it is sufficient to manufacture one type of core plate liner for the first core plate liner 511 and the second core plate liner 512. Therefore, the manufacturing and management of the core plate liner 51 becomes easier.

In the bogie 10 of this embodiment, the two holes 341 in the central upper plate 34 are spaced apart from each other in the left-right direction. In addition, two mounting portions 351 are provided on the central lower plate 35. This makes it possible to lift the core plate 50 evenly in the left-right direction using two lifting devices 80. Therefore, the core plate 50 remains stable in the lifted state while the car body height is being adjusted by the core plate liner 51.

(Modification of the push-up device)
If the extension amount of the rod 81 of the push-up device 80 is insufficient, the bolster 20 and the car body 2 cannot be sufficiently lifted. For example, this situation occurs when a large number of core plate liners 51 have already been installed. This situation also occurs when a large number of left side support liners 61 have already been installed, or when a large number of right side support liners 71 have already been installed. When this situation occurs, the insufficient extension amount of the rod 81 can be eliminated by using a jig 82 in the push-up device 80.

Figure 5 is a cross-sectional view showing the state during the body height adjustment work. The push-up device 80 shown in Figure 5 differs from the push-up device 80 shown in Figure 4B in that it has a jig 82 connected to the end of the rod 81. The jig 82 is, for example, a steel block. The jig 82 is detachable from the rod 81. In this case, the rod 81 of each push-up device 80 extends upward, and the bolster 20 and the body 2 can be lifted via the jig 82.

In FIG. 5, the jig 82 is connected to the tip of the rod 81. However, the jig 82 may be disposed, for example, on the central lower plate 35 to which the push-up device 80 is attached. It may be disposed on the left lower plate 37. It may be disposed on the right lower plate 39. In this case, since each of the push-up devices 80 is raised, the bolster 20 and the vehicle body 2 can be lifted even if the extension of the rod 81 is insufficient.

[Second embodiment]
Fig. 6 is a top view of the bogie frame 30a of the bogie 10a of the second embodiment. Referring to Fig. 6, two holes 341a are formed in the central upper plate 34a. The two holes 341a are arranged at a distance from each other in the front-rear direction. In this embodiment, each of the two holes 341a is located at the center of the central upper plate 34a in the left-right direction.

The core plate liner 51a is divided into two. That is, the core plate liner 51a is composed of a first core plate liner 511a and a second core plate liner 512a. The first core plate liner 511a is arranged to the left of the two holes 341a. The second core plate liner 512a is arranged to the right of the two holes 341a. In short, the first core plate liner 511a and the second core plate liner 512a are arranged so as to sandwich the two holes 341a in the left-right direction. In this case, the two holes 341a of the central upper plate 34a are provided between the first core plate liner 511a and the second core plate liner 512a. Therefore, the rod 81 of the push-up device 80 inserted into the hole 341a does not interfere with the first core plate liner 511a and the second core plate liner 512a.

In the bogie 10a of this embodiment, the first core plate liner 511a and the second core plate liner 512a are arranged so as to sandwich the two holes 341a in the left-right direction. With this configuration, the first core plate liner 511a and the second core plate liner 512a can evenly support the core plate 50 in the front-rear direction after the car body height is adjusted.

In the second embodiment, the first core plate liner 511a and the second core plate liner 512a have shapes that are symmetrical to each other in the left-right direction. In this case, the first core plate liner 511a and the second core plate liner 512a can be shared with each other. In this case, it is sufficient to manufacture one type of core plate liner as the first core plate liner 511a and the second core plate liner 512a. Therefore, the manufacturing and management of the core plate liner 51a becomes easier.

In the bogie 10a of this embodiment, the two holes 341a in the central upper plate 34a are spaced apart from each other in the front-to-rear direction. This makes it possible to use the two lifting devices 80 to lift the core plate 50 evenly in the front-to-rear direction. Therefore, the core plate 50 remains in a stable lifted state while the car body height is being adjusted by the core plate liner 51a.

[Third embodiment]
7 is a top view of the bogie frame 30b of the bogie 10b of the third embodiment. Referring to FIG. 7, the central upper plate 34b of the bogie 10b of the present embodiment has two notches 341b formed therein, instead of the two holes 341 provided as openings in the first embodiment. Here, the notches can also be said to be holes provided in the plate so as to include the edge of the plate. The two notches 341b are arranged at a distance from each other in the left-right direction. Of the two notches 341b, the notch 341b provided on the left side cuts out the left edge of the central upper plate 34b. The notch 341b provided on the right side cuts out the right edge of the central upper plate 34b.

Similarly, two notches 361b are formed in the left upper plate 36b instead of the two holes 361 in the first embodiment. The two notches 361b are arranged at a distance from each other in the front-to-rear direction. The notches 361b each cut out the left edge of the left upper plate 36b. However, the shape of the notches 361b is not limited to this. For example, the notch 361b provided on the front side of the two notches 361b may be configured to cut out the front edge of the left upper plate 36b, and the notch 361b provided on the rear side may be configured to cut out the rear edge of the left upper plate 36b.

In addition, two notches 381b are formed in the right upper plate 38b instead of the two holes 381 in the first embodiment. The two notches 381b are arranged at a distance from each other in the front-to-rear direction. The notches 381b each cut out the right edge of the right upper plate 38b. However, the shape of the notches 381b is not limited to this. For example, the notch 381b provided on the front side of the two notches 381b may cut out the front edge of the right upper plate 38b, and the notch 381b provided on the rear side may cut out the rear edge of the right upper plate 38b.

As described above, the space between the central upper plate 34 and the central lower plate 35 opens to the outside on both the left and right sides. The push-up device 80 is inserted into the space between the central upper plate 34 and the central lower plate 35 through each opening. At this time, since the central upper plate 34b has cutout portions 341b on both the left and right sides, the push-up device 80 can be inserted even when the rod 81 of the push-up device 80 is extended.

The space between the left upper plate 36 and the left lower plate 37 opens to the outside on the left side. The push-up device 80 is inserted into the space between the left upper plate 36 and the left lower plate 37 from the opening. At this time, since the left upper plate 36b has a notch 361b on the left side, the push-up device 80 can be inserted even when the rod 81 of the push-up device 80 is extended.

The space between the right upper plate 38 and the right lower plate 39 opens to the outside on the right side. The push-up device 80 is inserted into the space between the right upper plate 38 and the right lower plate 39 from the opening. At this time, since the right upper plate 38b has a notch 381b on the right side, the push-up device 80 can be inserted even when the rod 81 of the push-up device 80 is extended.

The above describes the embodiments of the present disclosure. However, the above-described embodiments are merely examples for implementing the present disclosure. Therefore, the present disclosure is not limited to the above-described embodiments, and can be implemented by modifying the above-described embodiments as appropriate within the scope of the spirit of the present disclosure.

(Number of horizontal beams)
In the above-described embodiment, two cross beams 33 are provided side by side in the front-rear direction. However, the number of cross beams 33 is not limited to this. One cross beam 33 may be joined to the center of the left beam 31 and the right beam 32 in the front-rear direction. In this case, for example, a central upper plate 34 and a central lower plate 35 separate from the cross beam 33 may be fixed to the cross beam 33. Specifically, the central upper plate 34 is fixed to the upper surface of the cross beam 33, and the central lower plate 35 is fixed to the lower surface of the cross beam 33. In another example, the cross beam 33 may include the central upper plate 34 and the central lower plate 35. Specifically, a part of the upper surface of the cross beam 33 becomes the central upper plate 34, and a part of the lower surface of the cross beam 33 becomes the central lower plate 35. In this case, an opening for inserting the push-up device 80 is formed on the front and rear surfaces of the cross beam 33, respectively.

(Left upper plate and left lower plate)
In each of the above embodiments, the left upper plate 36 and the left lower plate 37 are provided on the outer side surface (left side surface) of the left burr 31. However, the configuration of the left upper plate 36 and the left lower plate 37 is not limited to this. For example, the left upper plate 36 may be fixed to the upper surface of the left burr 31, and the left lower plate 37 may be fixed to the lower surface of the left burr 31. In another example, the left burr 31 may include the left upper plate 36 and the left lower plate 37. Specifically, a part of the upper surface of the left burr 31 becomes the left upper plate 36, and a part of the lower surface of the left burr 31 becomes the left lower plate 37. In this case, an opening for inserting the push-up device 80 is formed on the outer side surface (left side surface) of the left burr 31.

(Right side upper plate and right side lower plate)
In each of the above embodiments, the right upper plate 38 and the right lower plate 39 are provided on the right side surface (right side surface) of the right burr 32. However, the configuration of the right upper plate 38 and the right lower plate 39 is not limited to this. For example, the right upper plate 38 may be fixed to the upper surface of the right burr 32, and the right lower plate 39 may be fixed to the lower surface of the right burr 32. In another example, the right burr 32 may include the right upper plate 38 and the right lower plate 39. Specifically, a part of the upper surface of the side burr 32 becomes the right upper plate 38, and a part of the lower surface of the right burr 32 becomes the right lower plate 39. In this case, an opening for inserting the push-up device 80 is formed on the right side surface (right side surface) of the right burr 32.

10, 10a, 10b: bogie 1: railway vehicle 2: car body 20: bolster 30: bogie frame 31: left side beam 32: right side beam 33: cross beam 34: central upper plate 35: central lower plate 36: left side upper plate 37: left side lower plate 38: right side upper plate 39: right side upper plate 341, 361, 381: hole (opening)
351, 371, 391: Mounting portion 50: Center plate 51: Center plate liner 60: Left side support 61: Left side support liner 70: Right side support 71: Right side support liner 80: Push-up device 81: Rod

Claims (9)

A bogie for a railway vehicle, comprising:
a left beam and a right beam each extending in the front-rear direction;
A cross beam extending in the left-right direction and joined to the left beam and the right beam;
A bolster extending in the left-right direction;
a center plate supporting a center portion of the bolster;
A central lower plate is disposed below the core plate and fixed to the cross beam, the central lower plate having an attachment portion to which a push-up device including a rod that can be extended and contracted in the vertical direction can be attached;
a central upper plate disposed between the center plate and the central lower plate and fixed to the cross beam, the central upper plate having an opening formed above the mounting portion of the central lower plate;
a core plate liner inserted between the core plate and the central top plate;
A trolley equipped with: 2. The dolly according to claim 1,
The core plate liner is divided into two parts, and is composed of a first core plate liner and a second core plate liner. The bogie according to claim 2,
The opening is located at the center of the central upper plate in the front-rear direction,
A cart, wherein the first core plate liner and the second core plate liner are arranged so as to sandwich the opening in the front-to-rear direction. The dolly according to claim 3,
A bogie, wherein the first core plate liner and the second core plate liner have shapes symmetrical to each other in the front-to-rear direction. The cart according to claim 3 or 4,
The opening is composed of two openings, and the two openings are arranged at a distance from each other in the left-right direction. The bogie according to claim 2,
The opening is located at the center of the central upper plate in the left-right direction,
A cart, wherein the first core plate liner and the second core plate liner are arranged so as to sandwich the opening in the left-right direction. 7. The bogie according to claim 6,
A bogie, wherein the first core plate liner and the second core plate liner have shapes symmetrical to each other in the left-right direction. A dolly according to claim 6 or 7,
The opening is composed of two openings, and the two openings are arranged at a distance from each other in the front-to-rear direction. A bogie for a railway vehicle, comprising:
a left beam and a right beam each extending in the front-rear direction;
A cross beam extending in the left-right direction and joined to the left beam and the right beam;
A bolster extending in the left-right direction;
a left side support supporting a left end portion of the bolster;
a right side support supporting a right end portion of the bolster;
a left lower plate disposed below the left support and fixed to the left beam, the left lower plate having an attachment portion to which a push-up device including a rod that is extendable in the vertical direction can be attached;
a left upper plate disposed between the left support and the left lower plate and fixed to the left beam, the left upper plate having an opening formed above the mounting portion of the left lower plate;
a left support liner inserted between the left support and the left upper plate;
A right side lower plate is disposed below the right side support and fixed to the right side beam, the right side lower plate having an attachment portion to which a push-up device including a rod that can be extended and contracted in the vertical direction can be attached;
a right upper plate disposed between the right support and the right lower plate and fixed to the right beam, the right upper plate having an opening formed above the mounting portion of the right lower plate;
a right side support liner inserted between the right side support and the right side upper plate;
A trolley equipped with:

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