GB2589404A

GB2589404A - Railway vehicle bogie

Info

Publication number: GB2589404A
Application number: GB2011205.8A
Authority: GB
Inventors: Yoshimura Kimiyasu; Sawada Takahiko; Badalotti Timoteo; Mochida Toshihiko; Koreishi Kazuto; Takahara Kyouji; Nakahara Ayumi
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 2019-08-01
Filing date: 2020-07-20
Publication date: 2021-06-02
Anticipated expiration: 2040-07-20
Also published as: JP2021024362A; JP7214590B2; GB2589404B; GB202011205D0

Abstract

A railway vehicle bogie (1, figure 1) having a structure in which a bogie cover 12 can be easily positioned when the bogie cover 12 is fixed to the bogie. The railway vehicle bogie includes a bogie frame 4 including a side beam 2, a bogie cover provided at an end portion in a longitudinal direction X of the side beam, a lock portion 13 or a mounting portion (15, figure 4) provided on the bogie cover 12, and a reception portion 14 provided on the side beam and configured to receive the lock portion 13 or the mounting portion 15 provided on the bogie cover 12. The bogie may also comprise a bogie frame including a side beam; a bogie cover provided at an end portion in a longitudinal direction of the side beam; a lock portion provided on the bogie cover and configured to receive the lock portion provided on the side beam.

Description

DESCREPTION

Title of Invention: RAILWAY VEHICLE BOGIE

Technical Field

The present invention relates to a railway vehicle bogie, and particularly to a railway vehicle bogie provided in a railway vehicle.

Background Art

A railway vehicle includes a hexahedral vehicle body structure (hereinafter, referred to as a "body structure") for passengers or the like to board, and a railway vehicle bogie (hereinafter, referred to as a "bogie") provided below two end portions in a longitudinal direction of the vehicle body structure.

The bogie includes a bogie frame that rotatably holds a wheel axle including a wheel and an axle. The bogie frame is connected to a lower surface of the body structure by a traction device or the like. The bogie frame is movable relative to the body structure so that the railway vehicle can turn in a substantially horizontal plane when the railway vehicle passes through a curve or the like and can perform a pitching operation when the railway vehicle passes through a vertical curve or the like.

On the other hand, Patent Literature 1 discloses a technique of providing a cover (bogie cover) on a bogie frame to reduce air resistance to a railway vehicle.

Citation List Patent Literature Patent Literature 1: JP-A-2018-184164

Summary of Invention

Technical Problem As described in Patent Literature 1, air resistance caused by a high-speed flow can be reduced by providing the bogie cover on a bogie. At this time, the bogie cover is fixed to the bogie frame of the bogie by bolts. In order to reduce the air resistance, the bogie cover may have three surfaces respectively corresponding to a side surface, an upper surface, and a longitudinal end surface of a side beam constituting the bogie frame. For example, when the bogie cover having the three surfaces is fixed to the bogie frame, the bogie cover is positioned on screw seats provided on the side beam and is fixed by bolts. However, when the bogie cover is fixed by the bolts, positions for positioning the bogie cover are hidden by the bogie cover and positioning points cannot be directly seen. Accordingly, a large number of man-hours may be required for positioning.

The invention has been made in view of the above circumstances and an object thereof is to provide a railway vehicle bogie having a structure in which a bogie cover can be easily positioned when the bogie cover is fixed to the bogie.

Problems, configurations, and effects other than those described above will be apparent from the following description of embodiments.

Solution to Problem To solve the above problems, a representative railway vehicle bogie according to the invention includes a bogie frame including a side beam, a bogie cover provided at an end portion in a longitudinal direction of the side beam, a lock portion or a mounting portion provided on the bogie cover, and a reception portion provided on the side beam and configured to receive the lock portion or the mounting portion provided on the bogie cover.

Advantageous Effect According to the invention, the bogie cover can be easily positioned on the railway vehicle bogie when the bogie cover is fixed to the bogie.

Brief Description of Drawings

FIG. 1 is a perspective view illustrating an example of a railway vehicle bogie including no bogie cover.

FIG. 2 is a perspective view illustrating a railway vehicle bogie according to an embodiment of the invention, which illustrates an example of a railway vehicle bogie including a bogie cover.

FIG. 3 is a cross-sectional view illustrating a first example of the railway vehicle bogie and taken along a line A-A in FIG. 2.

FIG. 4 is a cross-sectional view illustrating a second example of the railway vehicle bogie and taken along the line A-A in FIG. 2.

FIG. 5 is a cross-sectional view illustrating a third example of the railway vehicle bogie and taken along a line B-B in FIG. 2.

FIG. 6 is a perspective view illustrating a first specific example of positioning by a reception portion fixed to an end surface or a side surface of a bogie frame and a lock portion provided on the bogie cover.

FIG. 7 is a perspective view illustrating a second specific example of positioning by the reception portion fixed to the end surface or the side surface of the bogie frame and the lock portion provided on the bogie cover.

FIG. 8 is a perspective view illustrating a third specific example of positioning by a reception portion fixed to an upper surface of the bogie frame and a mounting portion provided on the bogie cover.

Description of Embodiments

Hereinafter, embodiments of the invention will be described in detail with reference to the drawings. In the drawings, the same components are denoted by the same names and reference numerals and repetitive descriptions thereof will be omitted. Directions are defined in the drawings. A longitudinal direction (rail direction) of a bogie is defined as X, a width direction (sleeper direction) of the bogie is defined as Y, and a height direction of the bogie perpendicular to both X and Y directions is defined as Z. In the following description, the directions may be simply described as an X direction, a Y direction, and a Z direction.

FIG. 1 is a perspective view illustrating an example of a railway vehicle bogie including no bogie cover. A railway vehicle includes a vehicle body including a hexahedral vehicle body structure for passengers or the like to board, and a bogie 1 that is a railway vehicle bogie provided below two end portions in the longitudinal direction of the vehicle body. The bogie 1 in FIG. 1 includes a bogie frame including two side beams 2 that are spaced apart in parallel in the X direction and a middle beam 3 provided in the Y direction to connect the two side beams 2 at central portions in the X direction of the two side beams 2. The bogie 1 includes two wheel axles 11 each including an axle 4 and wheels 6 at two end portions of the axle 4. Each of the wheel axles 11 is held by the bogie frame at two corresponding end portions in the X direction of the side beams 2 and is rotatable via axle boxes 5 at two sides of the wheel axle 11.

An axle spring 7 (primary spring) is provided between an upper end portion of the axle box 5 and a lower end portion of the side beam 2. Apair of air springs 8 (secondary springs) are provided at two end portions in the Y direction of the middle beam 3 of the bogie frame and face upward from the middle beam 3 so that the vehicle body provided above the bogie 1 is elastically supported by the air springs 8.

A pair of yaw dampers 9 are provided on corresponding lateral sides (sides far from a central portion C in the Y direction of the wheel axle 11) of the side beams 2. The pair of yaw dampers 9 prevent the bogie 1 from vibrating in a horizontal plane (X-Y plane) when the railway vehicle travels at high speed. One end portion in the X direction of the yaw damper 9 is fixed to the side beam 2 and the other end portion is fixed to a yaw damper receiver 10 provided in a manner of hanging down from a lower surface of the vehicle body.

FIG. 2 is a perspective view illustrating a railway vehicle bogie according to an embodiment of the invention, which illustrates an example of a railway vehicle bogie including bogie covers 12 in contrast with the bogie 1 in FIG. 1. The bogie cover 12 includes end portion covers 12a provided at two end portions in the X direction of the side beam 2 constituting the bogie frame, and a central portion cover 12b provided at the central portion in the X direction of the side beam 2.

The end portion cover 12a has three surfaces including an upper plate 12au that covers an upper surface of the side beam 2, a side plate 12as that covers a side surface of the side beam 2, and an end plate 12ae that covers an end surface in the longitudinal direction (X direction) of the side beam 2. The end portion cover 12a covers the end portion in the longitudinal direction (X direction) of the side beam 2, the axle box 5, the axle spring 7, the yaw damper receiver 10, a part of the yaw damper 9, and the like. The central portion cover 12b includes a single plate and mainly covers the yaw damper 9.

The end portion cover 12a is mechanically fixed to the side beam 2 or the like constituting the bogie frame at a plurality of places (not illustrated) by bolts or the like. The central portion cover 12b is fixed to the yaw damper 9. (First Example) FIG. 3 is a cross-sectional view illustrating a first example of the railway vehicle bogie and taken along a line A-A in FIG. 2.

In the first example illustrated in FIG. 3, the side beam 2 constituting the bogie frame includes a reception portion 14 on a side surface of the side beam 2 constituting the bogie frame far from the central portion C in the Y direction of the wheel axle 11 (hereinafter, referred to as a "wheel axle central portion C"). The reception portion 14 receives a lock portion 13. The reception portion 14 is fixed to the side surface of the side beam 2 by welding or the like. A fixed position is, for example, at the side surface of the side beam 2 above the axle box 5.

The lock portion 13 is fixed to a wheel axle central portion C side of the side plate 12as of the end portion cover 12a by a mechanical fastening unit 20 such as a bolt or a rivet.

That is, the lock portion 13 is fixed to the end portion cover 12a to protrude toward the wheel axle central portion C from the side plate 12as. The lock portion 13 has such a shape so as to be received by the reception portion 14. By engaging the lock portion 13 with the reception portion 14, a position of the end portion cover 12a relative to the side beam 2 is determined.

(Second Example)

In the second example illustrated in FIG. 4, the side beam 2 constituting the bogie frame includes a reception portion 16 on an upper surface of the side beam 2. Amounting portion 15 is mounted on the reception portion 16. The reception portion 16 is fixed to an upper surface of the end portion in the X direction of the side beam 2 by welding or the like. A fixed position is, for example, at the upper surface of the side beam 2 above the axle box 5.

The mounting portion 15 is provided on a lower surface side of the upper plate 12au of the end portion cover 12a. The mounting portion 15 is fixed to the upper plate 12au of the end portion cover 12a by the mechanical fastening unit 20 such as a bolt or a rivet. That is, the mounting portion 15 is fixed to the end portion cover 12a to protrude downward from the upper plate 12au. The mounting portion 15 has such a shape so as to be received by the reception portion 16. By mounting (engaging) the mounting portion 15 on (with) the reception portion 16, the position of the end portion cover 12a relative to the side beam 2 is determined.

(Third Example)

In the third example illustrated in FIG. 5, the reception portion 14 that receives the lock portion 13 is provided on an end surface in the X direction, which is the longitudinal direction, of the side beam 2 constituting the bogie frame. The reception portion 14 is fixed to the end surface of the side beam 2 by welding or the like.

The lock portion 13 is fixed to a side beam 2 side of the endplate 12ae of the end portion cover 12a by the mechanical fastening unit 20 such as a bolt or a rivet. That is, the lock portion 13 is fixed to the end portion cover 12a to protrude toward the side beam 2 from the endplate 12ae. The lock portion 13 has such a shape so as to be received by the reception portion 14. By engaging the lock portion 13 with the reception portion 14, the position of the end portion cover 12a relative to the side beam 2 is determined.

(First Specific Example of Positioning) FIG. 6 is a perspective view illustrating a first specific example of positioning by a reception portion fixed to an end surface or a side surface of a bogie frame and a lock portion provided on a bogie cover. Although not illustrated, the side beam 2 constituting the bogie frame is located behind the reception portion 14, and the end portion cover 12a is located near the lock portion 13. The first specific example of the positioning is applicable to the first example in FIG. 3 and the third example in FIG. 5.

The lock portion 13 includes a disk-shaped abutting portion 13a formed on a reception portion 14 side (side beam 2 side) and a cylindrical protruding portion 13b extending from the abutting portion 13a toward a side opposite to the reception portion 14 (end portion cover 12a side). An outer diameter of the abutting portion 13a is larger than an outer diameter of the protruding portion 13b. The protruding portion 13b is formed with a hole 13c on an inner diameter side of the protruding portion 13b, into which the mechanical fastening unit 20 such as a bolt or a rivet can be fixed. When the first specific example of the positioning is applied to the first example in FIG. 3, a protruding direction of the protruding portion 13b is the Y direction and a transverse direction is the X direction. When the first specific example of the positioning is applied to the third example in FIG. 5, the protruding direction of the protruding portion 13b is the X direction and the transverse direction is the Y direction. The lock portion 13 is fixed to the end portion cover 12a (side plate 12as or end plate 12ae) at an end portion (end portion in the Y direction or the X direction) of the protruding portion 13b.

The reception portion 14 includes a plate-shaped base portion 14a fixed to the side beam 2 by welding or the like and a pocket portion 14b formed of a plate substantially parallel to the base portion 14a. The base portion 14a and the pocket portion 14b defines a gap 14f therebetween. The gap 14f receives a lower side of the disk-shaped abutting portion 13a. The gap 14f has a size that exactly covers a thickness of the abutting portion 13a. The pocket portion 14b includes a concave portion 14c at an end edge (upper end portion) in the Z direction of the pocket portion 14b. The cylindrical protruding portion 13b of the lock portion 13 is locked in the concave portion 14c. The concave portion 14c is a semicircular recess and has a semicircular radius that is substantially the same as the outer diameter of the cylindrical protruding portion 13b. When the first specific example of the positioning is applied to the first example in FIG. 3, a plate-shaped surface of the base portion 14a is parallel to an XZ plane and the transverse direction is the X direction. When the first specific example of the positioning is applied to the third example in FIG. 5, the plate-shaped surface of the base portion 14a is parallel to a YZ plane and the transverse direction is the Y direction.

Next, a positioning method and an effect of the first specific example of the positioning in FIG. 6 will be described with reference to the first example in FIG. 3.

When the end portion cover 12a is positioned to be fixed to the side beam 2 from the side far from the wheel axle central portion C, the lock portion 13 and the reception portion 14 are hidden behind the end portion cover 12a. Accordingly, an attachment operator cannot easily grasp a positional relationship between the lock portion 13 and the reception portion 14.

However, in the configuration in FIG. 6, the attachment operator can abut the end portion cover 12a against the side beam 2 at an approximate position and thereafter can position the end portion cover 12a by lowering (in a -Z direction) the end portion cover 12a in an abutted state. At this time, the abutting portion 13a can enter and fit into the gap 14f of the pocket portion 14b of the reception portion 14 by lowering a surface of the abutting portion 13a of the lock portion 13 of the end portion cover 12a in an operation direction 25 along a surface of the base portion 14a of the reception portion 14 of the side beam 2.

When the lock portion 13 is lowered, the protruding portion 13b extending from the abutting portion 13a is guided to the concave portion 14c provided on the end edge of the pocket portion 14b and is fitted into the gap 14f of the reception portion 14. Since the abutting portion 13a of the lock portion 13 is guided to the pocket of the reception portion 14, a position of the end portion cover 12a in the Y direction (protruding direction of the protruding portion 13b) is determined. When a lower surface of the protruding portion 13b of the lock portion 13 abuts against and fits in the concave portion 14c of the reception portion 14, a position of the end portion cover 12a in the X direction (transverse direction of the plate shape of the abutting portion 13a) and in the Z direction (height direction) is determined and a positioned state of the end portion cover 12a is maintained. With this configuration, the bogie cover 12 can be easilypositionedwhen the bogie cover 12 is fastened to the bogie 1 by bolts or the like.

(Second Specific Example of Positioning) FIG. 7 is a perspective view illustrating a second specific example of positioning by the reception portion fixed to the end surface or the side surface of the bogie frame and the lock portion provided on the bogie cover. Although not illustrated, the side beam 2 constituting the bogie frame is located behind the reception portion 14, and the end portion cover 12a is located near the lock portion 13. The second specific example of the positioning is applicable to the first example in FIG. 3 and the third example in FIG. 5.

The lock portion 13 includes the plate-shaped abutting portion 13a formed on the reception portion 14 side (side beam 2 side) and the protruding portion 13b protruding from the abutting portion 13a toward the side opposite to the reception portion 14 (end portion cover 12a side) and extending in the Z direction (height direction). A transverse width of the abutting portion 13a is larger than a transverse width of the protruding portion 13b so that the abutting portion 13a protrudes from two sides of the protruding portion 13b in the transverse direction. Although a transverse size W of an upper portion of the abutting portion 13a is constant, a transverse size of a lower portion of the abutting portion 13a continuously decreases toward a lower end portion of the abutting portion 13a. The protruding portion 13b is formed with a plurality of holes 13c in the height direction, into which the mechanical fastening unit 20 such as a bolt or a rivet can be fixed. When the second specific example of the positioning is applied to the first example in FIG. 3, the protruding direction of the protruding portion 13b is the Y direction and the transverse direction is theX direction. When the second specific example of the positioning is applied to the third example in FIG. 5, the protruding direction of the protruding portion 13b is the X direction and the transverse direction is the Y direction. The lock portion 13 is fixed to the endportioncover12a (side plate 12as or end plate 12ae) at an end portion (end portion in the Y direction or the X direction) of the protruding portion 13b.

The reception portion 14 includes the plate-shaped base portion 14a fixed to the side beam 2 by welding or the like and the pocket portion 14b formed of a plate substantially parallel to the base portion 14a. The base portion 14a and the pocket portion 14b defines the gap 14f therebetween. The gap 14f receives the two sides of the plate-shaped abutting portion 13a. The gap 14f has a size that exactly covers the thickness of the abuttingportion13a. The pocket portion 14b includes a groove 14d at a central portion in the transverse direction of the pocket portion 14b. The groove 14d is formed in the Z direction (height direction) and has an open upper portion. A transverse size in the Z direction of an upper portion of the groove 14d continuously increases toward an upper end portion of the groove 14d. This forms a shape of a funnel opening upward and forms an upper reception portion 14e. A transverse size of a lower end portion of the groove 14d is constant. The transverse size of the groove 14d in this region is slightly larger than a transverse size of the protruding portion 13b so that the protruding portion 13b of the lock portion 13 can pass through the groove 14d. When the second specific example of the positioning is applied to the first example in FIG. 3, the plate-shaped surface of the base portion 14a is parallel to the XZ plane and the transverse direction is theX direction. When the second specific example of the positioning is applied to the third example in FIG. 5, the plate-shaped surface of the base portion 14a is parallel to the YZ plane and the transverse direction is the Y direction.

Next, a positioning method and an effect of the second specific example of the positioning in FIG. 7 will be described with reference to the first example in FIG. 3.

When the end portion cover 12a is positioned to be fixed to the side beam 2 from the side far from the wheel axle central portion C, the lock portion 13 and the reception portion 14 are hidden behind the end portion cover 12a. Accordingly, the attachment operator cannot easily grasp the positional relationship between the lock portion 13 and the reception portion 14.

However, in the configuration in FIG. 7, the attachment operator can abut the end portion cover 12a against the side beam 2 at an approximate position and thereafter can position the end portion cover 12a by lowering (in the -Z direction) the end portion cover 12a in an abutted state. At this time, a plate-shaped surface of the abutting portion 13a of the lock portion 13 of the end portion cover 12a is lowered in the operation direction 25 along the surface of the base portion 14a of the reception portion 14 of the side beam 2. In this process, the protruding portion 13b of the lock portion 13 is guided to a predetermined position in the X direction (transverse direction) by the reception portion 14e, and the abutting portion 13a of the lock portion 13 enters and fits into the gap 14f of the pocket portion 14b of the reception portion 14.

When the lock portion 13 is pressed downward, the protruding portion 13b extending from the abutting portion 13a enters and fits into the groove 14d at a lower end portion of the pocket portion 14b so that the position in the X direction (transverse direction) of the end portion cover 12a is determined and the lock portion 13 is prevented from rotating in the X-Z plane (plane parallel to the plate shape of the abutting portion 13a) by the groove 14d. In the process in which the abutting portion 13a of the lock portion 13 is guided to the gap 14f of the pocket portion 14b of the reception portion 14, the position in the Y direction (protruding direction of the protruding portion 13b) of the end portion cover 12a is determined. When the protruding portion 13b of the lock portion 13 fits in the groove 14d of the reception portion 14, a position of the end portion cover 12a in the X direction (protruding direction of the protruding portion 13b) and in the Z direction (height direction) is determined and a positioned state of the end portion cover 12a is maintained. With this configuration, the bogie cover 12 can be easily positioned when the bogie cover 12 is fastened to the bogie 1 by bolts or the like.

Although FIGS. 6 and 7 showa case where the lock portion 13 is fixed to the end portion cover 12a and the reception portion 14 is fixed to the side beam 2, corresponding objects to which the lock portion 13 and the reception portion 14 are fixed may be interchanged. That is, the lock portion 13 is fixed to the side beam 2, and the reception portion 14 is fixed to the end portion cover 12a. In this case, in FIG. 6 or 7, the reception portion 14 is fixed to the end portion cover 12a in a direction opposite to the Z direction. Accordingly, the reception portion 14 can engage with the lock portion 13 and achieve the same positioning effect.

(Third Specific Example of Positioning) FIG. 8 is a perspective view illustrating a third specific example of positioning by a reception portion fixed to an upper surface of the bogie frame and a mounting portion provided on the bogie cover. Although not illustrated, the side beam 2 constituting the bogie frame is located below the reception portion 16, and the upper plate 12au of the end portion cover 12a is located above the mounting portion 15. The third specific example of the positioning is applicable to the second example in FIG. 4.

The mounting portion 15 includes a plate-shaped base portion 15a fixed to the upper plate 12au of the end portion cover 12a and a convex portion 15b protruding downward (-Z direction) from the base portion 15a. When the end portion cover 12a is positioned on the side beam 2, the convex portion 15b of the mounting portion 15 enters and fits into a concave portion 16b of the reception portion 16. A shape of a horizontal cross section of the convex portion 15b is not limited to a rectangle illustrated in FIG. 8 and may be a circle, an ellipse, or the like. The base portion 15a is formed with a plurality of holes 15c on an upper surface side of the base portion 15a. The mechanical fastening unit 20 such as a bolt or a rivet can be fixed into the hole 15c.

The reception portion 16 includes a plate-shaped base portion 16a (bottom portion) fixed to the side beam 2 by welding or the like and the concave portion 16b formed by removing a member in a central portion from an upper side of the base portion 16a (bottom portion). A shape of the concave portion 16b fits the shape of the convex portion 15b of the mounting portion 15. For example, a shape of a horizontal cross section of the concave portion 16b is not limited to a rectangle illustrated in FIG. 8 and may be a circle, an ellipse, or the like. The concave portion 16b may also have a shape in which a portion of the concave portion 16b fits the mounting portion 15. In this case, for example, when the concave portion 16b is circular, the convex portion 15b may have a shape having an arc to abut against and fit a portion of a circumference of the concave portion 16b.

Next, a positioning method and an effect of the third specific example of the positioning in FIG. 8 will be described with reference to the second example in FIG. 4.

When the end portion cover 12a is positioned to be fixed to the side beam 2 from the side far from the wheel axle central portion C, the mounting portion 15 and the reception portion 16 are hidden behind the end portion cover 12a. Accordingly, the attachment operator cannot easily grasp the positional relationship between the mounting portion 15 and the reception portion 16.

However, in the configuration in FIG. 8, the attachment operator abuts the end portion cover 12a against the side beam 2 at an approximate position, and thereafter searches for a position in which the convex portion 15b of the mounting portion fits into the concave portion 16b of the reception portion 16 while slightly moving the end portion cover 12a in the horizontal plane (X-Y plane) in the abutted state. When the convex portion 15b fits into the concave portion 16b, a position of the end portion cover 12a relative to the side beam 2 in the X, Y, and Z directions is determined. With this configuration, the bogie cover 12 can be easilypositionedwhen the bogie cover 12 is fastened to the bogie 1 by bolts or the like.

(Overall Configuration) When the end portion cover 12a includes the upper plate 12au, the side plate 12as, and the end plate 12ae, the end portion cover 12a can be easily positioned with the configuration of including the lock portion 13 on the sideplate 12as and including the reception portion 14 on the side surface in the Y direction of the side beam 2 constituting the bogie frame, the configuration of including the lock portion 13 on the end plate 12ae and including the reception portion 14 on the end surface in the X direction of the side beam 2 constituting the bogie frame, or the configuration of including the mounting portion 15 on the upper plate 12au and including the reception portion 16 on the upper surface of the side beam 2 constituting the bogie frame.

(Fixing After Positioning) With the configurations described above with reference to FIGS. 1 to 8, the bogie cover 12 is fixed to the bogie frame by bolts (not illustrated) after the bogie cover 12 is positioned to the side beam 2 (bogie frame). At this time, since the positioning is completed and the positioned state is maintained, the bolts (not illustrated) can be easily fastened to through holes (not illustrated) provided in the bogie cover 12 and bolt seats (seats where female screws of the bolts are cut, not Illustrated) provided in the bogie frame (side beam 2).

The invention is not limited to the embodiments described above and includes various modifications. For example, the above embodiments have been described in detail for easy understanding of the invention, and the invention is not necessarily limited to those including all the configurations described above. Besides, a part of a configuration of one embodiment can be replaced with a configuration of another embodiment, and a configuration of another embodiment can be added to a configuration of one embodiment. A part of a configuration of the embodiments maybe deleted and may be added and replaced with another configuration.

Reference Sign List 1 bogie 2 side beam middle beam 4 axle axle box 6 wheel 7 axle spring (primary spring) 8 air spring (secondary spring) 9 yaw damper yaw damper receiver 11 wheel axle 12 bogie cover 12a end portion cover 12au upper plate 12ae end plate 12as side plate 12b central portion cover 13 lock portion 13a abutting portion 13b protruding portion 13c hole 14 reception portion 14a base portion 14b pocket portion 14c concave portion 14d groove 14e reception portion 14f gap mounting portion 15a base portion 15b convex portion 15c hole 16 reception portion 16a base portion (bottom portion) 16b concave portion operation direction central portion in Y direction of wheel axle (wheel axle central portion)

Claims

CLAIMS1. A railway vehicle bogie comprising: a bogie frame including a side beam; a bogie cover provided at an end portion in a longitudinal direction of the side beam; a lock portion or a mounting portion provided on the bogie cover; and a reception portion provided on the side beam and configured to receive the lock -Portion or the mounting portion provided on the bogie cover.
2. The railway vehicle bogie according to claim 1, wherein the bogie cover includes an upper plate that covers an upper surface of the side beam, a sideplate that covers a side surface of the side beam, and an end plate that covers an end surface in the longitudinal direction of the side beam, the reception portion is provided on the side surface of the side beam, and the lock portion is provided on the side plate.
3. The railway vehicle bogie according to claim 1, wherein the bogie cover includes an upper plate that covers an upper surface of the side beam, a sideplate that covers a side surface of the side beam, and an end plate that covers an end surface in the longitudinal direction of the side beam, the reception portion is provided on the end surface in the longitudinal direction of the side beam, and the lock portion is provided on the end plate.
4. The railway vehicle bogie according to claim 1, wherein the bogie cover includes an upper plate that covers an upper surface of the side beam, a sideplate that covers a side surface of the side beam, and an end plate that covers an end surface in the longitudinal direction of the side beam, the reception portion is provided on the upper surface of the side beam, and the mounting portion is provided on the upper plate.
5. A railway vehicle bogie comprising: a bogie frame including a side beam; a bogie cover provided at an end portion in a longitudinal direction of the side beam; a lock portion provided on the side beam; and a reception portion provided on the bogie cover and configured to receive the lock portion provided on the side beam.
6. The railway vehicle bogie according to claim 5, wherein the bogie cover includes an upper plate that covers an upper surface of the side beam, a sideplate that covers a side surface of the side beam, and an end plate that covers an end surface in the longitudinal direction of the side beam, the lock portion is provided on the side surface of the side beam, and the reception portion is provided on the side plate.
7. The railway vehicle bogie according to claim 5, wherein the bogie cover includes an upper plate that covers an upper surface of the side beam, a sideplate that covers a side surface of the side beam, and an end plate that covers an end surface in the longitudinal direction of the side beam, the lock portion is provided on the end surface in the longitudinal direction of the side beam, and the reception portion is provided on the end plate.
8. The railway vehicle bogie according to any one of claims 2, 3, 6, and 7, wherein the reception portion includes a plate-shaped base portion and a pocket portion substantially parallel to the base portion, the pocket portion including a plate formed with a concave portion at an end portion of the plate, the lock portion includes a plate-shaped abutting portion and a protruding portion extending from the abutting portion, and the abutting portion of the lock portion enters a gap of the pocket portion of the reception portion, and the protruding portion of the lock portion abuts against the concave portion of the reception portion, so that a position is determined.
9. The railway vehicle bogie according to any one of claims 2, 3, 6, and 7, wherein the reception portion includes a plate-shaped base portion, and a pocket portion substantially parallel to the base portion, the pocket portion including a plate provided with a groove formed in a height direction in a central portion in a transverse direction of the plate, the lock portion includes a plate-shaped abutting portion and a protruding portion protruding from the abutting portion and extending in the height direction, and the abutting portion of the lock portion enters a gap of the pocket portion of the reception portion, and the protruding portion of the lock portion enters the groove of the reception portion, so that a position is determined.
10. The railway vehicle bogie according to claim 4, wherein the reception portion includes a plate-shaped bottom portion and a concave portion formed on an upper side of the bottom portion, the mounting portion includes a plate-shaped base portion and a convex portion protruding downward from the base portion, and the convex portion of the mounting portion fits into the concave portion of the reception portion so that a position is determined.