JP6932097B2 - Bogie for rail vehicles - Google Patents

Description

The present invention relates to a bogie for rail vehicles.

The running resistance of a rail car traveling at high speed, for example, a rail car, is the mechanical resistance caused by the wheels rolling on the track, the frictional resistance between the surface of the rail car and the air, and the connection between the cars. It can be roughly divided into the pressure resistance caused by the air gap in the part and the turbulence of the air passing through the trolley and the current collector. Friction resistance and pressure resistance are collectively called air resistance.

In the region where the speed of trains is high, pressure resistance is particularly dominant, but there is a demand to suppress the air resistance of railway vehicles as much as possible in order to realize energy saving. Patent Document 1 discloses a large cover loaded on the trolley and a trolley provided with the cover in order to reduce the air resistance around the trolley.

International Publication No. 2012/0626969

By the way, in a bogie used for a railroad vehicle, the amount of lubricating oil sealed in the axle box having bearings, the degree of wear of the brake pads that brake the wheels, or the slip that is sprayed between the wheels and the rails. Regular maintenance and inspection is required, such as checking the remaining amount of sand for stopping.

Therefore, when covering the side of the trolley with a cover or the like in order to reduce the air resistance, it is desirable not to impair the workability of these maintenance and inspection as much as possible. However, according to the technique relating to the trolley provided with the large cover described in Patent Document 1, it can be expected to reduce the air resistance, but from the viewpoint of improving the workability of the maintenance and inspection of the trolley, a problem to be solved further. There is.

An object of the present invention is to provide a bogie for rail vehicles capable of reducing air resistance without impairing workability related to maintenance and inspection of each part of the bogie.

In order to solve the above problems, one of the typical rail vehicles of the present invention is a rail vehicle bogie provided with a pair of yaw dampers that suppress yawing of the rail vehicle bogie.
The yaw damper is provided with a windshield cover on the end side of the rail vehicle in the width direction in contact with air flowing in the vicinity of the rail vehicle carriage.
The yaw damper has a large-diameter portion and a small-diameter portion coaxially and telescopically connected to the large-diameter portion.
The windshield cover is connected to the large-diameter portion, and is provided at one end of the yaw damper in the longitudinal direction on the vehicle body side and at the other end of the yaw damper in the longitudinal direction on the bogie side. Achieved by covering the part and.

Since the present invention has the above configuration, it is possible to provide a bogie for rail vehicles capable of reducing air resistance without impairing workability related to maintenance and inspection of each part of the bogie.
Issues, configurations and effects other than those described above will be clarified by the description of the following embodiments.

FIG. 1 is a side view of the railway vehicle 1. FIG. 2 is a perspective view of a bogie provided for the railroad vehicle 1. FIG. 3 is a plan view of a bogie provided for the railroad vehicle 1. FIG. 4 is a perspective view of the yaw damper provided on the trolley. FIG. 5 is a plan view of the yaw damper provided on the trolley. FIG. 6 is a side view of the yaw damper provided on the trolley. FIG. 7 is an end face view (AA arrow viewing end face) of the yaw damper provided for the bogie.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, each direction to be used for explanation is defined. The longitudinal direction or rail direction of the rail vehicle is the X direction, the width direction or sleeper direction of the rail vehicle is the Y direction, the height direction of the rail vehicle is the Z direction, and hereinafter, simply referred to as the X direction, the Y direction, and the Z direction.

Rail vehicles are vehicles that are operated along the track to be laid, and include railway vehicles, monorail vehicles, road trains, new transportation vehicles, and the like. As a typical example of the rail vehicle, a railroad vehicle will be taken up and an embodiment of the present invention will be described.

FIG. 1 is a side view of a railroad vehicle. The railcar 1 has an underframe forming a floor surface, side structures 10 erected at both ends of the underframe in the Y direction, and a wife structure erected at both ends of the underframe in the X direction (not shown). It is composed of a railroad vehicle structure composed of a side structure 10 and a roof structure 11 mounted on the upper end of the wife structure, and a carriage 20 that movably supports the railroad vehicle structure along the track 5. NS.

The carriage 20 is configured to turn in the horizontal plane and in the vertical plane in order to follow the curvature of the track 5 in the horizontal plane and the vertical curve of the start and end points of the gradient. Therefore, a space is provided around the bogie 20 so that the bogie 20 can turn. Below the front and rear underframes of the carriage 20 in the X direction, side covers 12 are provided that cover the various devices provided below the underframe with the carriage 20 and the space interposed therebetween.

The bogie 20 is provided so as to be bridged between the lower ends of the yaw damper receivers 14 provided at both ends of the underframe of the railcar 1 in the Y direction and the side beams forming the bogie frame forming the bogie 20. Connected via. The yaw damper 40 does not interfere with the yawing motion in which the bogie 20 turns along the curvature of the track 5 in the horizontal plane, but when the bogie 20 vibrates at a high frequency in the horizontal plane due to hunting or the like. , Has a function of suppressing this vibration. Further, the bogie 20 includes an anti-rolling device 29 that suppresses deterioration of riding comfort by suppressing rolling vibration in which the railroad vehicle 1 vibrates around an axis along the X-axis.

FIG. 2 is a perspective view of a bogie provided for the railroad vehicle 1. The carriage 20 includes a pair of side beams 22 extending in the X direction and spaced substantially parallel to each other, and a middle beam 24 provided along the Y direction while connecting the central portions of the side beams 22 in the X direction. It has a bogie frame composed of. The bogie frame has a substantially H-shaped shape as a bird's-eye view in the Z direction.

Wheel sets and axles 26 are provided at both ends of the bogie frame in the X direction. The wheel sets 26 are rotatably held by a shaft box 27 provided at both ends in the Y direction and having a built-in bearing. The axle box 27 is displaceably supported by the bogie frame in the X and Z directions by a shaft beam 28 connected below the side beam 22 forming the bogie frame.

The railcar structure is supported by a pair of air springs 23 mounted on both ends of the middle beam 24 forming the bogie frame in the Y direction. The bogie 20 and the railroad vehicle structure are connected via an anti-rolling device 29. The anti-rolling device 29 has a function of suppressing rolling vibration around the axis of the railroad vehicle structure along the X axis with respect to the bogie 20.

Specifically, the anti-rolling device 29 connects a pair of vertical members 29V hanging from the lower surfaces of both side ends in the width direction of the underframe and the lower ends of these vertical members 29V to each other and below the carriage 20 along the Y direction. It is composed of a horizontal member 29H arranged in. In the anti-rolling device 29, when rolling vibration occurs in the railway vehicle structure, a twist acts on the horizontal member 29H connected to the vertical member 29V, and the horizontal member 29H resists this twist, thereby causing the rolling vibration. Demonstrates an anti-rolling function that suppresses.

FIG. 3 is a plan view of a bogie provided for the railroad vehicle 1. The bogie 20 is connected to the railroad vehicle structure forming the railroad vehicle 1 via the yaw damper 40 and the anti-rolling device 29. At this time, on each side, the end side surface of the yaw damper 40 in the Y direction, the yaw damper receiver 14, the vertical member 29V (a part of the anti-rolling device 29), and the side cover 12 are formed on a virtual vertical surface B along the XZ plane. It is located in substantially the same plane.

With this configuration, after the air flowing along the side cover 12 provided below the railway vehicle 1 is separated from the side cover 12, the side surface of the yaw damper 40, the yaw damper receiver 14, and the vertical member 29V forming the anti-rolling device 29 are formed. The air resistance of the railroad vehicle 1 is increased by reducing the turbulence of the air flow caused by these members and suppressing the air from flowing into the space provided in the Y direction of the trolley 20. Can be suppressed.

FIG. 4 is a perspective view of the yaw damper provided on the trolley, and FIG. 5 is a plan view of the yaw damper provided on the trolley. Further, FIG. 6 is a side view of the yaw damper provided on the bogie, and FIG. 7 is an end view of the yaw damper provided on the bogie (AA arrow viewing end face of FIG. 6).

As shown in each figure, the yaw damper 40 that suppresses excessive turning and swinging of the bogie 20 has a large diameter cylinder (large diameter portion) 42 and a small diameter cylinder (small diameter) that is coaxially and telescopically connected to the large diameter cylinder 42. Part) 44, the bogie side fixing portion 48 connected to the end of the large diameter cylinder 42 of the yaw damper 40 in the X direction (longitudinal direction), and the end of the small diameter cylinder 44 of the yaw damper 40 in the X direction (longitudinal direction). It is mainly composed of a vehicle body side fixing portion 47, and a windshield cover 46 that is supported by the large-diameter cylinder 42 and covers most of the sides of the large-diameter cylinder 42 and the small-diameter cylinder 44. As the yaw damper 40, for example, a piston and a cylinder structure having a simple orifice and a damping force can be used by giving resistance to the piston when oil passes through the orifice by the operation of the piston. , Not limited to that.

The vehicle body side fixing portion 47 having a hollow tubular shape of the yaw damper 40 is fitted with the vehicle body side fastening portion 47b via an elastic body 47a included therein, and the vehicle body side fastening portion 47b has bolt holes in the vicinity of both ends. .. Similarly, the trolley-side fixing portion 48 having a hollow tubular shape is fitted with the trolley-side fastening portion 48b via an elastic body 48a included therein, and the trolley-side fastening portion 48b has bolt holes in the vicinity of both ends. .. With reference to FIG. 2, the vehicle body side fastening portion 47b is fastened to the lower end portion of the yaw damper receiver 14 in the Z direction with a bolt (not shown) inserted into the bolt hole, and the bogie side fastening portion 48b is on the bogie 20 side. It is fastened with a bolt (not shown) inserted into the bolt hole in the vicinity of the portion where the shaft beam 28 on the side surface of the beam 22 is connected. As a result, the yaw damper 40 is attached so as to connect the bogie 20 and the yaw damper receiver 14.

In FIG. 4, the windshield cover 46 is provided integrally with the large-diameter cylinder 42 via a flange-shaped support portion 46S provided on the outer periphery of the large-diameter cylinder 42. The windshield cover 46 is provided so as to cover one side surface (outer surface) of the yaw damper 40 in the Y direction over half a circumference.

Further, in FIG. 7, the windshield cover 46 has a pair of horizontal portions 46H having horizontal planes at both ends in the Z direction, and a curvature that connects to the horizontal portions 46H and extends toward the central portion of the yaw damper 40 in the Z direction. It has a pair of curved surface portions 46C and a vertical portion 46V along the XZ plane while connecting both ends in the Z direction to the pair of curved surface portions 46C. The curved surface portion 46C connects the horizontal portion 46H and the vertical portion 46V in a manner of covering both ends of the yaw damper 40 in the height direction (Z direction). By imitating the outer surface of the large-diameter cylinder 42 in this way, the windshield cover 46 can be miniaturized. Further, by providing the horizontal portion 46H, the dimension of the windshield cover 46 in the height direction can be suppressed. It is desirable that the outer surfaces of the horizontal portion 46H, the curved surface portion 46C, and the vertical portion 46V have smooth surfaces so as not to cause air turbulence as much as possible.

Since the windshield cover 46 has a symmetrical shape with the center in the Z direction interposed therebetween, the common parts can be flipped left and right and used, and the cost can be reduced.

As is clear from FIG. 6, one end of the windshield cover 46 (horizontal portion 46H, curved surface portion 46C, and vertical portion 46V) in the X direction covers the vehicle body side fixing portion 47, and the other end portion in the X direction thereof. Covers the trolley side fixing portion 48. This ensures a smooth flow of air and reduces air resistance as much as possible. The windshield cover 46 suffices to cover at least a part of the vehicle body side fixing portion 47 and the bogie side fixing portion 48. In addition to the above-described form, the windshield cover 46 may be formed only by curved surface portions 46C connected to both ends of the vertical portion 46V in the Z direction. Alternatively, the windshield cover 46 may be extended to cover the lower end of the yaw damper receiver 14.

In FIG. 3, when the railroad vehicle 1 travels at high speed, the flow along the surface of the side cover 12 is separated at the end portion of the side cover 12 in the X direction. Since each of the pair of yaw dampers 40 is provided with a windshield cover 46 on the end side (outside) in the Y direction, the flow separated from the side cover 12 is smoothly flowed (rectified) rearward along the surface of the windshield cover 46. Therefore, it is possible to suppress the collision with the side of the trolley 20 and to suppress the appearance of the flow toward the central portion of the trolley 20 in the Y direction. Therefore, it is possible to suppress the flow separated from one side cover 12 in the X direction of the carriage 20 from colliding with the other side cover 12, and thus it is possible to suppress an increase in air resistance.

Although not shown, a pair of vertical members 29V forming the anti-rolling device 29 are provided with a windshield cover having the same configuration as the windshield cover 46 provided on the yaw damper 40 on the end side (outside) of the pair of vertical members 29V in the Y direction. By covering 29V, it is possible to further prevent the flow separated from one side cover 12 in the X direction of the trolley 20 from colliding with the other side cover 12, so that an increase in air resistance can be suppressed.

According to the above-described configuration, instead of providing a large-area cover that covers the entire side of the bogie 20, a relatively small windshield cover 46 that covers the yaw damper 40 is provided, so that the axle box 27 having the bearing of the bogie 20 is used. It is easy for people to access, the amount of lubricating oil sealed in the axle box 27 can be easily confirmed, and the wheel set 26 of the bogie 20 is easily accessible to the operator, and the brake pads that brake the wheels are easily worn. You can check it. Therefore, it is possible to provide a railroad vehicle bogie that can improve the workability of these maintenance and inspections and can also reduce the air resistance by providing the windshield cover 46.

1 ... railroad vehicle, 5 ... track,
10 ... side structure, 11 ... roof structure,
12 ... side cover, 14 ... yaw damper receiver,
20 ... dolly, 22 ... side beam,
23 ... Air spring, 24 ... Middle beam,
26 ... wheel set, 27 ... axle box,
28 ... Shaft beam, 29 ... Anti-rolling device,
29V ... vertical member, 29H ... horizontal member,
40 ... yaw damper, 42 ... large diameter cylinder,
44 ... Small diameter cylinder, 46 ... Windshield cover,
46V ... vertical part, 46H ... horizontal part,
46C ... curved surface, 46S ... support,
47 ... Fixed part on the vehicle body side, 47a ... Elastic body,
47b ... Body side fastening part, 48 ... Bogie side fixing part,
48a ... elastic body, 48b ... trolley side fastening part,
B ... Virtual vertical plane,
X ... Longitudinal (rail) direction, Y ... Width (sleeper) direction,
Z ... Height direction

Claims (4)

In a rail vehicle bogie equipped with a pair of yaw dampers that suppress yawing of the rail vehicle bogie
The yaw damper is provided with a windshield cover on the end side of the rail vehicle in the width direction in contact with air flowing in the vicinity of the rail vehicle carriage.
The yaw damper has a large-diameter portion and a small-diameter portion coaxially and telescopically connected to the large-diameter portion.
The windshield cover is connected to the large-diameter portion, and is provided at one end of the yaw damper in the longitudinal direction on the vehicle body side and at the other end of the yaw damper in the longitudinal direction on the bogie side. Covering the part and
A bogie for rail vehicles featuring. In the rail vehicle bogie according to claim 1.
The windshield cover
A vertical portion that is supported by a support portion that is joined to the large-diameter portion and is provided along a vertical surface, and a vertical portion.
A pair of curved surface portions that are connected to both ends of the vertical portion in the height direction and are provided so as to cover the large diameter portion and the small diameter portion.
To have
A bogie for rail vehicles featuring. In the rail vehicle bogie according to claim 2.
The windshield cover has a horizontal portion extending in the horizontal direction from an end portion of the curved surface portion in the height direction so as to cover the yaw damper.
A bogie for rail vehicles featuring. In the rail vehicle bogie according to any one of claims 1 to 3.
The anti-rolling device is provided with an anti-rolling device that suppresses rolling vibration of the vehicle body supported by the rail bogie.
A pair of vertical members provided in a manner of hanging from both ends in the width direction of the underframe forming the floor surface of the vehicle body, and
A horizontal member connecting the lower ends of the pair of vertical members,
Consists of
Another windshield cover that covers the vertical member is provided on the end side of the vertical member in the width direction of the vehicle body.
A bogie for rail vehicles featuring.

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