HK1205489B - Railway vehicle bogie - Google Patents

Description

Bogie for railway vehicle

Technical Field

The present invention relates to a bogie for a railway vehicle.

Background

In order to suppress so-called sway of a railway vehicle and to alleviate impact on a vehicle body during traveling, a bolster spring is provided between a bogie of the railway vehicle and the vehicle body. For example, in an electric vehicle, as shown in fig. 7 and 8, a bolster spring 30 is provided between a bogie 10 and an underframe 21 of a vehicle body 20 of the electric vehicle. In this case, the bolster spring 30 is placed such that the lower end surface 30a of the bolster spring 30 is placed on the upper surface 11a of the side member 11 of the bogie 10.

Patent document 1: chinese utility model No. CN201619580 specification

Disclosure of Invention

Problems to be solved by the invention

However, in a state in which the bolster spring 30 is placed on the upper surface 11a of the side member 11 of the bogie 10 as shown in fig. 7 and 8, the upper end surface 30b of the bolster spring 30 is positioned at a position corresponding to the height of the bolster spring 30. As a result, the bottom surface of the vehicle body 20 has to be made high, or in order to suppress the rise in height of the bottom surface of the vehicle body 20, as shown in fig. 7, the following design is made: only a portion of the vehicle body under frame 21 corresponding to the occipital spring 30 is processed into a concave shape to secure the installation space 22 of the occipital spring 30 and the like. When the installation space 22 is provided, the space for mounting equipment in the vehicle body 20 is reduced, which leads to a need to increase the length of the vehicle body accordingly, and thus to an increase in the manufacturing cost of the motorcycle.

The present invention has been made to solve the above-described problems, and an object thereof is to provide a railway vehicle bogie which can secure an installation space for a mounting device in a vehicle body and can reduce vehicle manufacturing costs compared to the conventional bogie.

Means for solving the problems

To achieve the above object, the present invention is configured as follows.

That is, a railway vehicle bogie according to claim 1 of the present invention is a railway vehicle bogie that supports a vehicle body via a railway sleeper spring, the railway vehicle bogie including a pair of side members having a recess for accommodating the railway sleeper spring, each of the side members including: a side sill outer wall located on the vehicle width direction outer side and extending in the vehicle length direction; a side member inner wall located on the vehicle width direction inner side of the side member outer wall and extending in the vehicle length direction; a side member lower wall extending in the vehicle longitudinal direction and on which the bolster spring is placed; and a side rail upper wall that includes an opening through which an upper portion of the housed occipital spring protrudes and extends in a vehicle length direction, wherein the recess is formed by a side rail outer wall, a side rail inner wall, and a side rail lower wall, and houses the occipital spring through the opening, and a cross-sectional area of an opening-containing portion in which the opening is provided is larger than a cross-sectional area of a non-opening portion in which the opening is not provided in each of the side rails.

With this configuration, the railway vehicle bogie frame is configured such that the bolster spring is accommodated in the recess in the side rail of the bogie and the upper portion of the bolster spring protrudes from the opening in the upper wall of the side rail, and therefore the height of the bolster spring from the bogie can be reduced compared to the conventional bogie frame. Thus, it is not necessary to provide a recessed arrangement space for the spring on the vehicle body side as in the conventional case, and the vehicle manufacturing cost can be reduced as compared with the conventional case.

ADVANTAGEOUS EFFECTS OF INVENTION

The present invention can provide a railway vehicle bogie that can secure an installation space for a mounting device in a vehicle body and can reduce vehicle manufacturing costs compared to conventional bogies.

Drawings

Fig. 1 is a side view showing an example of a railway vehicle bogie according to an embodiment of the present invention.

Fig. 2 is a plan view of the railway vehicle bogie shown in fig. 1.

Fig. 3 is a sectional view of the portion a-a shown in fig. 2.

Fig. 4A is a cross-sectional view showing a modification of the recess shown in fig. 3.

Fig. 4B is a plan view of the modification shown in fig. 4A.

Fig. 4C is a plan view of another modification of the recess shown in fig. 3.

Fig. 5 is a plan view of another modification of the recess shown in fig. 3.

FIG. 6 is a view showing the cross-sectional areas of the A-A portion and the B-B portion shown in FIG. 2.

Fig. 7 is a side view showing an example of a conventional railway vehicle bogie.

Fig. 8 is a plan view of the conventional railway vehicle bogie shown in fig. 7.

Detailed Description

The following describes a railway vehicle bogie according to an embodiment with reference to the drawings. In the drawings, the same or similar components are denoted by the same reference numerals. In the following description and drawings, a 3-axis bogie for an electric locomotive is taken as an example, but the bogie for a railway vehicle according to the present embodiment is not limited thereto, and can be applied to a 2-axis bogie for an electric locomotive or the like.

Fig. 1 and 2 show a 3-axis bogie 101 for an electric locomotive, which corresponds to an example of a railway vehicle bogie according to the present embodiment. The bogie 101 is a bogie that supports the vehicle body 180 by interposing a spring 130 between the bogie 101 and the bottom of the vehicle body 180 of the electric vehicle, and has a side member 110 as a basic structure.

A pair of side members 110 are provided on both left and right sides of the bogie 101 in the vehicle width direction 191, and the side members 110 extend in the vehicle length direction 192, support axles, and have recesses 111 for accommodating the bolster springs 130. In the present embodiment, each side member 110 is a substantially square tubular steel member, and as shown in fig. 3, each side member 110 is formed by joining 4 plate members, i.e., a side member outer wall 112, a side member inner wall 113, a side member lower wall 114, and a side member upper wall 115, by welding. Thus, a portion surrounded by the side frame outer wall 112, the side frame inner wall 113, and the side frame lower wall 114 becomes the recess 111, and the spring sleeper 130 is housed in the recess.

Here, the side rail outer wall 112 is a plate material that is positioned outward in the vehicle width direction 191 and extends in the vehicle length direction 192. The side sill inner wall 113 is a plate member facing the side sill outer wall 112 in the vehicle width direction 191, positioned inward of the side sill outer wall 112, and extending in the vehicle length direction 192. Side member lower wall 114 is a plate member that extends in vehicle longitudinal direction 192 and on which the housed spring rests. The side member upper wall 115 is a plate member that has an opening 115a through which the upper portion 131 of the housed spring 130 protrudes and that extends in the vehicle length direction 192. In the present embodiment, each side member 110 is provided with two openings 115a along the vehicle length direction 192. Thus, in each side member 110, there are two recesses 111 for accommodating the spring 130 in the vehicle longitudinal direction 192. In the present embodiment, two occipital springs 130 are accommodated in each concave portion 111.

In each side member 110, the number of recesses 111 for housing the spring sleeper 130, that is, the number of openings 115a and the number of spring sleepers 130 housed in each recess 111 are not limited to those in the present embodiment.

In the present embodiment, the side member 110 and the recess 111 are formed by 4 plate members of the side member outer wall 112, the side member inner wall 113, the side member lower wall 114, and the side member upper wall 115, but the forming method is not limited thereto. In short, the side member 110 may have a recess 111 for accommodating the occipital spring 130.

Since the force and torsion force from the bolster spring 130 act on the side member 110 of the bogie 101, the side member 110 is required to have strength corresponding to this force. In order to ensure strength, for example, when the plate thickness of the entire steel material of the side member 110 is increased, the weight of the bogie 101 is increased. On the other hand, although the side member 110 is a portion on which the maximum force from the occipital spring 130 acts, the side member upper wall 115 is formed with the opening 115a as described above.

Therefore, in view of these circumstances, in the present embodiment, as shown in fig. 2, the side rail outer wall 112, the side rail lower wall 114, and the side rail upper wall 115 have the convex portion 117 protruding outward in the vehicle width direction 191 at the concave portion 111 for accommodating the bolster spring 130. By forming the projection 117, the cross-sectional area of the opening-containing portion 118a (a-a portion in fig. 2) of the side member 110 in which the opening 115a is provided becomes larger than the cross-sectional area of the non-opening portion 118B (B-B portion in fig. 2) of the side member 110 in which the opening 115a is not provided. Here, as shown in fig. 6, the cross-sectional area refers to an area of a square-shaped portion surrounded by the side sill outer wall 112, the side sill inner wall 113, the side sill lower wall 114, and the side sill upper wall 115, including areas of the side sill outer wall 112, the side sill inner wall 113, the side sill lower wall 114, and the side sill upper wall 115. That is, the cross-sectional area A of the portion A-A shown in FIG. 6 (a) is larger than the cross-sectional area B of the portion B-B shown in FIG. 6 (B).

With this configuration, the torsional strength of the portion with openings 118a can be made the same as the torsional strength of the portion without openings 118 b.

In the present embodiment, the convex portion 117 protruding outward in the vehicle width direction 191 is provided in order to increase the cross-sectional area a to be larger than the cross-sectional area B and to improve the torsional strength.

In the present embodiment, the projection 117 is provided as described above in accordance with the dimensional relationship between the side member 110 and the occipital spring 130, but the projection 117 is not an essential structure in some cases when a reinforcing member 140 (fig. 4A and the like) described later is provided in the opening 118a to secure strength.

As described above, the side member 110 has the concave portion 111 for accommodating the occipital spring 130, and as shown in fig. 1 and 3, at least half of the occipital spring 130 can be accommodated in the side member 110 in the vertical direction 193. Thus, according to the bogie 101 of the present embodiment, the projecting height of the upper surface 131a of the bolster spring 130 from the side rail upper wall 115 can be set to be extremely lower than that of the conventional one. Therefore, it is not necessary to set the height of the bottom surface of the vehicle body high, or it is not necessary to design as follows: only the portion of the underframe of the vehicle body corresponding to the spring is processed into a concave shape to ensure the installation space of the spring. This makes it possible to sufficiently secure an installation space for the mounting device in the vehicle body, and therefore, there is no need to extend the length of the vehicle body, and an increase in the manufacturing cost of the railway vehicle can be suppressed.

As shown in fig. 3, a drain hole 116 may be formed in the recess 111 for accommodating the spring 130 so as to penetrate through the side sill 114. Of course, the drain hole 116 is provided at a position not blocked by the occipital spring 130.

By providing the drainage hole 116 in this manner, rainwater can be prevented from accumulating in the concave portion 111.

As shown in fig. 4 (fig. 4A to 4C), a reinforcing member 140 may be provided in the recess 111 in which the occipital spring 130 is housed. The reinforcing member 140 is a plate material provided in the recess 111 corresponding to the opening 115a of the side sill upper wall 115, and includes, for example, a 1 st reinforcing member 141 and a 2 nd reinforcing member 142 as shown in fig. 4B, a 4 th reinforcing member 143 as shown in fig. 4C as a modification thereof, and a 3 rd reinforcing member 145 as shown in fig. 5.

The 1 st reinforcing member 141 is a plate material that is positioned between the side sill outer wall 112 and the opening 115a and extends in the vehicle length direction 192, and has a lower end joined to the side sill lower wall 114 by welding and an upper end joined to the side sill upper wall 115 by welding. The 2 nd reinforcing member 142 is a plate material that is located between the side sill inner wall 113 and the opening 115a and extends in the vehicle length direction 192, and has a lower end joined to the side sill lower wall 114 by welding and an upper end joined to the side sill upper wall 115 by welding.

In the present embodiment, as shown in fig. 4A, both the 1 st reinforcing member 141 and the 2 nd reinforcing member 142 are disposed so as to contact the circumferential surface of the opening 115a, but the present invention is not limited to this embodiment, and may be disposed so as to be closer to the side sill outer wall 112 or the side sill inner wall 113 than the circumferential surface of the opening 115 a.

As shown in fig. 4C, the 1 st reinforcing member 141 and the 2 nd reinforcing member 142 may be connected along the entire circumference of the opening 115a and integrally formed, thereby constituting a 4 th reinforcing member 143.

As described above, by providing the 1 st reinforcing member 141, the 2 nd reinforcing member 142, or the 4 th reinforcing member 143 in the opening portion 118a, as shown in fig. 4A, the 1 st closed cross section 151 having a rectangular shape is formed by the side sill outer wall 112, the side sill lower wall 114, the side sill upper wall 115, and the 1 st reinforcing member 141, and the 2 nd closed cross section 152 having a rectangular shape is formed by the side sill inner wall 113, the side sill lower wall 114, the side sill upper wall 115, and the 2 nd reinforcing member 142.

As described above, the force and the torsion force from the occipital spring 130 act on the side member 110, and in particular, there is a fear that the strength is reduced at the opening portion 118a where the opening 115a is provided. However, because of the 1 st and 2 nd closed cross sections 151 and 152 described above, the torsional strength of the opening-having portion 118a of the side sill 110 can be designed to be the same as that of the non-opening portion 118b while suppressing an increase in weight of the bogie 101.

The bogie 101 is provided with a cross member 120 for connecting a pair of left and right side members 110 extending in the vehicle width direction 191. As shown in fig. 5, the cross member 120 is located close to the concave portion 111 in which the bolster springs 130 are housed, and a plurality of bolster springs 130 may be housed in the vehicle length direction 192 in 1 concave portion 111. In this configuration, the force from the cross member 120 acts on the recess 111 in which the opening 115a is formed in the side member upper wall 115.

Therefore, the 3 rd reinforcing member 145 can be provided in the recess 111 for accommodating the occipital spring 130.

The 3 rd reinforcing member 145 is a plate member that is positioned between the respective bolster springs 130 disposed in the recess 111 and extends in the vehicle width direction 191, and is welded and fixed to at least the side rail outer wall 112 and the side rail inner wall 113, and more preferably also welded to the side rail lower wall 114 and the side rail upper wall 115.

By providing the 3 rd reinforcing member 145, even in a state where the cross member 120 is disposed close to the recess 111 in which the bolster spring 130 is housed, it is possible to increase the strength of the portion of the side member 110 on which the force from the bolster spring 130 acts, while suppressing an increase in the weight of the bogie 101.

In addition, when the 3 rd reinforcing member 145 is provided, the drainage hole 116 can be disposed at a position as shown in fig. 5, for example, with respect to each concave portion 111 divided by the 3 rd reinforcing member 145.

Further, the 1 st reinforcing member 141 and the 2 nd reinforcing member 142 described above may be provided together with the 3 rd reinforcing member 145, or the 4 th reinforcing member 143 may be provided together with the 3 rd reinforcing member 145.

As described above, according to the railway vehicle bogie of the embodiment, the bolster spring is accommodated in the recess in the side rail of the bogie and the upper portion of the bolster spring is projected from the opening of the side rail upper wall, so that the height of the bolster spring projected from the bogie can be reduced compared to the conventional one. Thus, it is not necessary to provide a concave space for arranging the spring on the vehicle body side as in the conventional case. Therefore, the installation space for mounting the equipment can be secured on the vehicle body side, and the vehicle manufacturing cost can be reduced compared with the conventional one.

In addition, the opening portion further includes: a 1 st reinforcing member located between the side member outer wall and the opening and extending in the vertical direction from the side member lower wall; and a 2 nd reinforcing member located between the side member inner wall and the opening and extending in the vertical direction from the side member lower wall. Here, the notched portion further includes: a rectangular 1 st closed cross section formed by the side frame outer wall, the side frame upper wall, the 1 st reinforcing member and the side frame lower wall, and a rectangular 2 nd closed cross section formed by the side frame inner wall, the side frame upper wall, the 2 nd reinforcing member and the side frame lower wall.

In this way, since the 1 st reinforcing member and the 2 nd reinforcing member are provided in the recess of the opening portion, it is possible to increase the strength of the bogie portion for accommodating the bolster spring while achieving weight reduction of the bogie, as compared with the case where the strength of the entire member constituting the bogie is increased. In addition, there is a concern that the side member of the bogie is provided with an opening, which reduces the torsional strength of the side member in particular. In contrast, by providing the 1 st reinforcing member and the 2 nd reinforcing member and forming the 1 st closed cross section and the 2 nd closed cross section of a rectangle on both the left and right sides of the opening portion, it is possible to ensure the same torsional strength as that of the non-opening portion of the side member.

In addition, in the structure in which the bogie beam is disposed in the vicinity of the recess in which the bolster spring is housed, by providing the 3 rd reinforcing member in the recess, the strength of the bogie portion for housing the bolster spring against the force from the beam can be increased.

Further, since the side member lower wall in the recess in which the anchor spring is housed has the drain hole, rainwater can be prevented from accumulating in the recess.

In addition, any of the above embodiments can exhibit the respective effects by being appropriately combined.

While the present invention has been fully described in connection with the preferred embodiments with reference to the attached drawings, various modifications and alterations will become apparent to those skilled in the art. Such variations and modifications are to be understood as being included within the scope of the present invention as defined by the appended claims, unless they depart therefrom.

The disclosures of the specification, drawings, claims and abstract of Japanese patent application No. 2012-104422, applied on 5/1/2012, are incorporated herein by reference.

Industrial applicability

The present invention is applicable to a bogie for a railway vehicle, and particularly to a bogie for an electric locomotive and various railway vehicles requiring a space for installation of equipment to be mounted.

Description of the reference numerals

101: bogie, 110: side member, 111: recess, 112: side member outer wall, 113: side member inner wall, 114: side member lower wall, 115: side member upper wall, 115 a: opening, 116: drainage hole, 118 a: opening portion, 118 b: non-opening portion, 130: occipital spring, 141: 1 st reinforcing member, 142: no. 2 reinforcing member, 143: 4 th reinforcing member, 145: 3 rd reinforcing member, 151: 1-closed section, 152: 2 nd closed section, 191: vehicle width direction, 192: vehicle length direction, 193: the vertical direction.

Claims (4)

1. A railway vehicle bogie for supporting a vehicle body by a bolster spring, comprising a pair of side members having a recess for accommodating the bolster spring,

each side member has:

a side sill outer wall located on the vehicle width direction outer side and extending in the vehicle length direction;

a side member inner wall located on the vehicle width direction inner side of the side member outer wall and extending in the vehicle length direction;

a side member lower wall extending in the vehicle longitudinal direction and on which the bolster spring is placed;

a side member upper wall including an opening through which an upper portion of the housed bolster spring protrudes and extending in the vehicle length direction,

the recess is formed by a side frame outer wall, a side frame inner wall, and a side frame lower wall, and houses a spring sleeper through the opening,

in each of the side members, a cross-sectional area of an opening portion where the opening is provided is larger than a cross-sectional area of a non-opening portion where the opening is not provided,

the opening portion further includes:

a 1 st reinforcing member that is located between the side sill outer wall and the opening and extends in a vertical direction from the side sill lower wall;

a 2 nd reinforcing member located between the side sill inner wall and the opening and extending in a vertical direction from the side sill lower wall,

the railway vehicle bogie further comprises:

a 1 st closed cross section of a rectangular shape formed by the side frame outer wall, the side frame upper wall, the 1 st reinforcing member, and the side frame lower wall;

and a 2 nd closed cross section of a rectangular shape formed by the side member inner wall, the side member upper wall, the 2 nd reinforcing member, and the side member lower wall.

2. The railway vehicle bogie according to claim 1, wherein at least 2 bolster springs are disposed adjacent to each other in the opening,

the vehicle further includes a 3 rd reinforcing member extending in the vehicle width direction between the bolster springs and fixed to the side rail outer wall and the side rail inner wall.

3. The railway vehicle bogie according to claim 2,

the railway vehicle bogie further comprises:

a cross member extending in the vehicle width direction and connecting the pair of side members,

a plurality of openings are arranged along the vehicle length direction,

the side member has the 3 rd reinforcing member in a recess at least at 1 of the plurality of openings,

the cross member is disposed adjacent to the opening having the 3 rd reinforcing member.

4. The railway vehicle bogie according to claim 1,

the side member lower wall on which the bolster spring is mounted further has a drain hole.