JP2012025325A - Underframe structure of rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an underframe structure of a rolling stock of a simple structure which is reduced in manufacturing cost and weight and compliant to barrier-free.SOLUTION: In a truck bolster 3, a lower surface 3Ba of both sides 3B located on both sides of a center part 3A is assumed to have the same height as an upper surface 4a of an air spring 4 in a position higher than the lower surface 3Aa of the center part 3A. A central part under surface 3Aa of the truck bolster 3 is connected to both sides lower surface 3Ba at an inclination part 3C. A lower pad plate 5 of both sides 3B of the truck bolster 3 connects to inside surface plate 2a of a side beam 2. The part to which the lower patch 5 of this inside surface plate 2a is connected is the part to which the end of a web plat part 2c is connected.

Description

  The present invention relates to a frame structure of a railway vehicle, and more particularly to a pillow beam structure of a frame frame.

  In recent years, in railway vehicles, the height of the floor surface tends to be reduced from the viewpoint of reducing the level difference between the floor surface and the upper surface of the platform to satisfy barrier-free requirements. On the other hand, there is a limit in reducing the height of the upper surface of the air spring that is the pillow spring of the carriage. In particular, since the height of the upper surface of the air spring is relatively high in a direct mount type (bolster anchor type) cart or the like, it may be necessary to place the upper part of the air spring in the pillow beam of the vehicle body.

  Thus, until now, the body pillow beam was provided with a cylindrical recess into which the upper part of the air spring fits, thereby avoiding interference and ensuring rigidity and strength.

  In the structure in which a cylindrical recess is provided in the pillow beam of the vehicle body, the number of parts and the number of welds are increased in order to form the recess, which causes an increase in cost. Even if the recess is formed by cutting without welding, the cost is not improved. In addition, such a recess is disadvantageous in terms of weight because it is necessary to increase the plate thickness in order to maintain strength.

  Therefore, at least the pillow beam joints of the pair of left and right side beams have a channel shape with the vehicle inside open, and the pillow beam is a portion extending from the air spring receiver to both ends of the sleeper beam in the sleeper direction with respect to the bottom surface in the center of the sleeper direction. The vertical dimension of both ends of the sleeper beam in the sleeper direction is made smaller than the vertical dimension of the central part of the sleeper direction and smaller than the vertical dimension of the side beam, and the both ends of the sleeper beam in the sleeper direction It has been proposed to join the side beam and the pillow beam by inserting both ends of the sleeper direction of the pillow beam into the pillow beam joint part of the side beam in a state where the spacer is arranged at the lower part of the part (for example, Patent Document 1). reference).

JP 2008-230320 A (paragraphs 0010 to 0011 and FIG. 3)

  In the thing of the said patent document 1, in the state which formed the side beam by the three channel members and the reinforcement member, and has arranged the spacer in the lower part of the sleeper direction both ends of the pillow beam at the pillow beam joint part of this side beam. Since it is inserted and the side beam and the pillow beam are joined, there are many welded parts, and the structure becomes complicated.

  Therefore, the inventor pays attention to having a web plate portion inside a side beam formed of an extruded shape member without using such a channel member. The present invention has been conceived in that the load from the pillow beam can be transmitted to the portion of the side beam where the high-strength web plate portion is provided if it is connected to the position where the web plate portion of the beam is provided. It was made. In this way, the present invention is not limited to the case where the side beam is formed of an extruded profile, and it has also been found that the same can be applied to a side beam having one or more web plate portions therein. .

  An object of the present invention is to provide a railcar frame structure that is simple in structure, has reduced manufacturing costs and weight, and is barrier-free.

  The invention of claim 1 includes left and right side beams extending in the longitudinal direction of the vehicle body and having one or a plurality of web plate portions therein, and pillow beams extending in the lateral direction of the vehicle body and coupled to the left and right side beams, The bottom surface of the central portion of the pillow beam is disposed below the upper surface of the air spring of the carriage in the vertical direction of the vehicle body, and the pillow beam is located on both sides of the central portion. The lower surface of the side portion is flush with the upper surface of the air spring at a position higher than the lower surface of the central portion, the lower surface of the central portion of the pillow beam and the lower surface of the left and right side portions are connected by an inclined surface, and the pillow beam The lower surface plate portion at the end of the left and right side portions of the side beam is connected to the inner side surface plate portion of the side beam, and the portion of the inner side surface plate portion to which the lower surface plate portion is connected is connected to the end portion of the web plate portion. It is the site | part currently made.

  In this way, even when the lower surface of the central portion of the pillow beam is arranged below the upper surface of the air spring of the carriage in the vertical direction of the vehicle body, it is not necessary to provide a cylindrical recess, and the left and right sides of the pillow beam are not provided. Since the bottom plate at the end of the side part is simply connected according to the position of the web plate on the side beam, the floor surface height can be lowered with a simple structure, making it barrier free. it can. In addition, since the welding amount is reduced, the manufacturing cost is reduced and the weight is also reduced.

  In this case, as described in claim 2, the web plate portion connected to the portion to which the lower surface plate portion of the inner surface plate portion is connected includes the inner surface plate portion and the outer surface plate portion of the side beam. It is desirable to be a web plate portion that connects the two and extends in the horizontal direction.

  If it does in this way, the load from the pillow beam extended in a horizontal direction can be smoothly received by the web board part of the side beam extended in a horizontal direction.

  As described in claim 3, it is desirable that a reinforcing member is provided at a portion of the pillow beam corresponding to the inclined surface.

  If it does in this way, the inclination part (part corresponding to an inclined surface) with a possibility that rigidity may fall is reinforced with a reinforcement member.

  In this case, as described in claim 4, the reinforcing member is provided on the front and rear surface plate portions of the pillow beam, and the lower surface of the central portion of the pillow beam and the lower surface of the left and right side portions are inclined to the inclined surface. It can be set as the plate-shaped member connected with an inclination angle smaller than an angle.

  If it does in this way, the part corresponding to an inclined surface can be reinforced with a simple structure, and the fall of rigidity can be avoided.

  According to a fifth aspect of the present invention, the side beam may be an extruded shape member having one or a plurality of web plate portions that connect the inner side surface plate portion and the outer side surface plate portion.

  In this way, an extruded shape can be used, so that the cost can be reduced.

  As described in claim 6, the left and right side portions of the pillow beam and the portion constituting the inclined surface are formed by cutting or cutting a lower surface portion, and a lower plate is provided on the lower surface side. It can be.

  In this way, by providing the lower plate, it becomes possible to receive the air spring of the carriage by the lower plate, and further avoiding a decrease in rigidity due to the lower surface side being cut or cut. Is done.

  As described above, according to the present invention, in order to reduce the floor surface height, the lower surface plate portion of the left and right side portions of the pillow beam is connected in accordance with the position where the web plate portion of the side beam is provided. As a result, the structure becomes simple and the welding amount is reduced, so that the manufacturing cost is reduced and the weight is also reduced. And it can cope with barrier-free.

1 shows an embodiment of a railcar frame structure according to the present invention, (a) is a sectional view showing the relationship between a pillow beam, a side beam and a side structure, and (b) is a part of a pillow beam portion of the frame frame. It is an enlarged view. It is a figure which shows a pillow beam, (a) is the perspective view seen from the downward direction, (b) is the perspective view seen from the top. It is the top view seen from the upper direction of a pillow beam. It is sectional drawing in the AA of FIG. FIG. 4 is a sectional view taken along line BB in FIG. 3. (A) and (b) are the front views and side views which show a lowering board.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 (a) and 1 (b), a vehicle body frame 1 is coupled to left and right side beams 2 of a closed cross-sectional structure extending in the longitudinal direction of the vehicle body and to the left and right side beams 2 extending in the lateral direction of the vehicle body. A pillow beam 3 is provided. The side beam 2 includes an inner side surface plate portion 2a and an outer side surface plate portion 2b extending in the vertical direction of the vehicle body, and a web plate portion 2c that connects the both surface plate portions 2a and 2b and extends in the horizontal direction. A side structure 11 extending in the vertical direction of the vehicle body is provided above the side beam 2.

  The pillow beam 3 is disposed below the upper surface 4a of the air spring 4 of the carriage (not shown) at the substantially same position as the lower surface 2d of the side beam 2 in the vertical direction of the vehicle body. A central stopper rubber attachment 12 is provided on the lower surface 3Aa of the central portion 3A.

  As shown in FIGS. 2A and 2B and FIGS. 3 to 5, the pillow beam 3 is formed by cutting or cutting a part of an extruded shape whose extrusion direction corresponds to the lateral direction of the vehicle body. is there.

  That is, the pillow beam 3 includes front and rear surface plate portions 3a and 3b, upper and lower surface plate portions 3c and 3d, web plate portions 3e and 3f connecting the upper and lower surface plate portions 3c and 3d, and lower end edges of the front and rear surface plate portions 3a and 3b. Although it has a shape having front and rear flange portions 3g, 3h extending in the front-rear direction, the lower portions of the left and right side portions 3B, 3B located on the left and right sides of the center portion 3A are cut or cut. By this excision or cutting, the central portion 3A of the pillow beam 3 and the left and right side portions 3B, 3B are connected via the left and right inclined portions 3C, 3C, and the vehicle body top and bottom are extended from the central portion 3A to the left and right side portions 3B, 3B. The direction length gradually decreases.

  Thereby, the lower surfaces 3Ba of the left and right side portions 3B, 3B are positioned higher than the lower surface 3Aa of the central portion 3A. The lower surface 3Ba of the side portion 3B has the same height as the upper surface 4a of the air spring 4 in the vertical direction of the vehicle body. The lower part of the air spring 4 is located below the lower surface 3Aa of the central part 3A. By utilizing such a positional relationship between the surfaces, the air springs 4 and 4 are arranged below the left and right side portions 3B and 3B, and the upper surface 4a of the air spring 4 is positioned above the lower surface 2d of the side beam 2. It can be located, and it can be set as an advantageous structure for achieving a low floor.

  4 and 5, it is clear that the front and rear surface plate portions 3a and 3b, the web plate portions 3e and 3f, and the front and rear flange portions 3g and 3h are removed by cutting or cutting in the side portions 3B and 3B. The length (length in the vertical direction of the vehicle body) is shorter than the central portion 3A. And, as shown in FIGS. 2 (a) and 2 (b) from the left and right side portions 3B, 3B to the left and right inclined portions 3C, 3C, the lower plates 5 and 5 are attached to the lower surface side by welding. Yes.

  As shown in FIGS. 6A and 6B, the lower plate 5 has an inclined plate portion 5b corresponding to the inclined portion 3C at a certain angle with respect to the horizontal plate portion 5a corresponding to the side portion 3B. It is bent to The lower plate 5 is formed with two rows of weld holes 5c, and the lower plate 5 is welded to the web plate portions 3e and 3f extending in the vertical direction of the body of the pillow beam 3 through the weld holes 5c. Thus, the lower plate 5 constitutes a part of the pillow beam 3 (lower surface plate portion).

  Cutout portions 5d and 5d are formed at portions of the lower backing plate 5 corresponding to the inclined portions 3C. As a result, in the state where the lower plate 5 is attached to the lower side of the pillow beam 3, the lower plate 5 extends from the vicinity of the connecting portion between the horizontal plate portion 5a and the inclined plate portion 5b to the inclined plate portion 5b. 3 (extruded shape member) is inserted between the front and rear surface plate portions 3a and 3b (see FIG. 1B). Further, in order to compensate for the decrease in rigidity of the pillow beam 3 due to the provision of the inclined portion 3C, a rectangular plate-shaped reinforcing member 7 is provided at the front and rear of the vehicle body at the lower end edge of the front and rear surface plate portions 3a and 3b in the portion of the inclined portion 3C. It is provided so as to protrude in the direction (see only the rear reinforcing member 7 in FIG. 5).

  The reinforcing member 7 is provided on the front and rear surface plate portions 3 a and 3 b of the pillow beam 3. The lower surfaces of the front and rear surface plate portions 3a and 3b where the reinforcing member 7 is provided are inclined portions smaller than the inclined angle of the inclined surface (inclined portion 3C), and the reinforcing member 7 is provided on the inclined portion. Therefore, the reinforcing member 7 has a plate shape that connects the lower surface of the central portion 3A of the pillow beam 3 and the lower surfaces of the left and right side portions 3B with an inclination angle smaller than the inclination angle of the inclined surface (inclined portion 3C). It is a member.

  In this way, the lower plate 5 functions as a lower surface plate portion of the pillow beam 3 in the left and right side portions 3B and the inclined portion 3C of the pillow beam 3 (portions where the lower portion has been removed by cutting or cutting). Will do.

  And the horizontal board part 5a which becomes a lower face board part of the pillow beam 3 (side part 3B), and extends in a horizontal direction is connected to the inner side board part 2a of the side beam 2 by welding. The site | part to which the lower plate 5 of this inner surface board part 2a is connected is a site | part with which the edge part of the web board part 2c is connected. Thereby, the load input to the side beam 2 from the lower plate 5 of the pillow beam 3 is received by the portion of the side beam 2 where the web plate portion 2c is provided and the rigidity is high.

  As shown in FIG. 5, the pillow beam 3 is formed by joining a front side member 3F and a rear side member 3R, which are extruded shapes, and has a stopper and an abnormal rise stop on the bottom surface inside the central portion 3A. Screw seats 6A and 6B for mounting the metal fittings are provided, and reinforcing members 8A and 8B in the vertical direction of the vehicle body are provided inside the left and right side portions 3B. Further, a bolster anchor receiving seat 13 is provided at a connection portion between the left and right side beams 2 and the pillow beam 3 (front side member 3F).

  If comprised as mentioned above, even if it is a case where lower surface 3Aa of pillow beam center part 3A is arrange | positioned in the same position as the lower surface of side beam 2 in the up-down direction of the vehicle body and lower than upper surface 4a of air spring 4 of the carriage. It is not necessary to provide a cylindrical recess as in the conventional structure, and the end portions of the horizontal plate portion 5a of the lower plate 5 (which constitutes the bottom plate portions of the left and right side portions 3B and 3B of the pillow beam 3), Since the side beam 2 is simply connected in accordance with the position where the web plate portion 2c is provided, the structure is simplified and the welding amount is reduced, so that the manufacturing cost is reduced and the weight is also reduced. In addition, the floor surface height can be lowered with such a simple structure, and barrier-free can also be supported.

  In addition to the above-described embodiment, the present invention can be implemented with the following modifications.

  (i) In the above embodiment, the web plate portion 2c of the side beam 2 connecting the lower surface plate portion (lower surface 3Ba) of the pillow beam 3 extends in the horizontal direction, but is not limited thereto, and is inclined in the horizontal direction. It is also possible to use a web plate portion extending as a result.

  (ii) In the above embodiment, the plate thickness of the horizontal plate portion 5a of the underlay plate 5 of the pillow beam 3 is thicker than the thickness of the web plate portion 2c of the side beam 2, and in the connected state, the horizontal plate portion 5a. However, the present invention is not limited to this, and the load from the horizontal plate portion 5a is applied to the web plate portion of the side beam 2. Any positional relationship that can be received in 2c may be used.

DESCRIPTION OF SYMBOLS 1 Vehicle body frame 2 Side beam 2a Inner side surface plate part 2b Outer side surface plate part 2c Web plate part 2d Side beam lower surface 3 Pillow beam 3A Pillow beam center part 3Aa Central part lower surface 3B Side part 3Ba Lower surface 3a Front plate part 3b Rear plate Part 4 Air spring 4a Upper surface 5 of air spring 5 Lower plate 5a Horizontal flat part (lower face plate part)
5b Inclined plate part 7 Reinforcing member

Claims (6)

A left and right side beam extending in the longitudinal direction of the vehicle body and having one or more web plate portions therein; and a pillow beam extending in the horizontal direction of the vehicle body and coupled to the left and right side beams; A railcar frame structure that is disposed below the upper surface of the carriage air spring in the vertical direction of the vehicle body,
In the pillow beam, the lower surfaces of the left and right side portions located on both sides of the central portion are at the same height as the upper surface of the air spring at a position higher than the lower surface of the central portion.
The lower surface of the central portion of the pillow beam and the lower surface of the left and right side portions are connected by an inclined surface,
The lower surface plate portion of the end portion of the left and right side portions of the pillow beam is connected to the inner side surface plate portion of the side beam, and the portion of the inner side surface plate portion to which the lower surface plate portion is connected is the end of the web plate portion. A railcar frame structure characterized in that the parts are connected to each other.
The web plate portion connected to a portion of the inner side plate portion to which the lower plate portion is connected is a web plate portion that connects the inner side plate portion and the outer side plate portion of the side beam and extends in the horizontal direction. The railcar frame structure according to claim 1.
The base frame structure for a railway vehicle according to claim 1 or 2, wherein a reinforcing member is provided at a portion of the pillow beam corresponding to the inclined surface.
The reinforcing member is provided on the front and rear plate portions of the pillow beam, and connects the lower surface of the central portion of the pillow beam and the lower surfaces of the left and right side portions with an inclination angle smaller than the inclination angle of the inclined surface. The railcar frame structure according to claim 3, wherein
The railcar according to any one of claims 1 to 4, wherein the side beam is an extruded shape member having one or a plurality of web plate portions that connect the inner side surface plate portion and the outer side surface plate portion. Underframe structure.
  The left and right side portions of the pillow beam are formed by cutting or cutting a lower surface portion and a portion constituting an inclined surface, and a lower plate is provided on the lower surface side. A railcar frame structure according to any one of the above.

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