JP2014037212A - Railway vehicle truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a railway vehicle truck including a truck frame made of a press molding material, capable of suppressing thinning, cracks and wrinkles, and size accuracy reduction, and reducing the number of repairing steps concerning problems, and having sufficient strength.SOLUTION: A side beam 10 includes a first side beam 10a disposed over the full length of the side beam 10 in a rail direction 100, a second side beam 10b disposed on a surface opposite the side beam 10a to which a horizontal beam 20 is connected and at both ends of the side beam 10a in a longitudinal direction, and a bottom plate 10c on which the first side beam 10a and the second side beam 10b are placed. Thus, on a side opposite the side beam 10a to which the horizontal beam 20 of the center part of the longitudinal direction of the first side beam 10a is connected, a yaw damper fitting region 40 including a yaw damper 30 is formed.

Description

  The present invention relates to a railcar bogie, and more particularly to a railcar bogie provided with a bogie frame for assembling a press-molded product by welding.

  Conventionally, a bogie frame that constitutes a bogie for a railway vehicle connects a straight side beam arranged along the rail direction and a center portion in the longitudinal direction of the side beam and is arranged along the sleeper direction. The main body is a bogie frame whose shape when viewed from above is a substantially H shape. As a technique for manufacturing the bogie frame including the side beams described above, Patent Document 1 and Patent Document 2 describe that an upper frame and a lower frame constituted by side beams and side beams are integrally formed by press molding into a concave shape. A structure has been devised that is welded in the direction.

JP-A-57-88939 JP 2000-85579 A

In the structure in which the press-molded concave integral molding described in the above-mentioned patent document is abutted and welded, the main members of the bogie frame are integrally molded by pressing, so the number of parts can be reduced and the stress is locally high and the strength is required. The advantage that the site | part made by a base material can be expected.
However, the position of the center part of the side beam in the longitudinal direction is the both ends of the side beam in the longitudinal direction so that the overall appearance of the carriage including the parts (dampers etc.) attached to the carriage frame is within the vehicle limit range. A structure (offset structure) closer to the center in the width direction (sleeper direction) of the bogie frame than the position of the part may be employed.

  When press-molding such a side beam, a flange standing shape whose longitudinal cross section in the longitudinal direction is a groove shape is molded, and there are portions that are locally stretched or brought close to each other. In addition to the material being easily thinned, cracked and wrinkled, there is a problem that the dimensional accuracy is likely to be lowered.

  Furthermore, in addition to the offset structure described above, the height of the central portion in the longitudinal direction of the side beam is lower than the height of both end portions in the longitudinal direction of the side beam (the vertical bending is added to the side beam) In the case of the above-mentioned shape, there is a tendency that the above-described material thinning, cracking, wrinkles, and the like, and dimensional accuracy decrease are remarkable. In particular, the decrease in dimensional accuracy means that when one press-molded product and the other press-molded product are butted and welded together, the combination of the two is not good and it takes a lot of man-hours to correct the shape (dimension) of the press-molded product There's a problem. In addition, when manufacturing side beams with a conventional four-sided structure, problems such as increased man-hours related to grinder finishing after welding and welding due to an increase in the number of parts and an increase in weld lines tend to occur. There is.

  The dimension between the longitudinal center parts of the opposing side beams is smaller than the dimension between both longitudinal end parts of the opposing side beams, and the height dimension from the rail upper surface to the longitudinal center part of the side beams is the rail. When a bogie frame with a shape smaller than the height dimension from the top surface to both ends of the side beam is combined with a press-molded product, material thinning, cracks, wrinkles and dimensional accuracy that occur during press molding are reduced. There is a problem to be solved in terms of suppressing the decrease.

  An object of the present invention is a bogie frame composed of a press-molded product, which suppresses material thinning, cracks, wrinkles, and deterioration of dimensional accuracy that occur during press molding, and reduces repair man-hours related to these defects Another object of the present invention is to provide a railcar bogie including a bogie frame that is capable of being sufficiently strong and rigid.

  In order to achieve the above object, a railway vehicle carriage according to the present invention suppresses yawing by a side beam that is spaced along the rail direction, a lateral beam that connects the longitudinal center of the side beam, and In a railway vehicle bogie having a yaw damper provided at a longitudinal center of the side beam, the side beam is connected to the lateral beam and is arranged over the entire length of the side beam. A second side beam provided at both ends in the longitudinal direction of the first side beam opposite to the first side beam to which the transverse beam is connected, the first side beam and the second side beam, And a yaw damper mounting area to which the yaw damper is mounted.

  ADVANTAGE OF THE INVENTION According to this invention, the bogie for rail vehicles provided with the bogie frame which has sufficient intensity | strength and rigidity while being able to reduce the repair man-hour accompanying the fall of the dimensional accuracy of press molding, etc. can be provided.

FIG. 1 is a plan view of a railcar bogie. FIG. 2 is a front view of the railway vehicle carriage shown in FIG. FIG. 3 is a plan view (corresponding to part B in FIG. 1) of a bogie frame provided for a railcar bogie according to the present invention. FIG. 4 is a perspective view of a bogie frame provided for a railcar bogie according to the present invention. FIG. 5 is a perspective view showing another embodiment of the bogie frame used in the railway car bogie according to the present invention. FIG. 6 is a perspective view showing still another embodiment of the bogie frame used in the railway car bogie according to the present invention.

  With reference to drawings, the Example of the bogie frame provided to the bogie for rail vehicles by this invention is described.

  FIG. 1 is a plan view of a railcar bogie, and FIG. 2 is a front view of the railcar bogie shown in FIG. The carriage is composed of an axle 50 having two wheels at both ends of the axle, and a carriage frame that rotatably supports the axle 50 via a bearing. The bogie frame has two side beams 10 separated in a form along the rail direction 100 in the longitudinal direction, and a central part in the longitudinal direction of the side beams 10 separated in a form along the sleeper direction 110 in the longitudinal direction. And two transverse beams 20 that connect each other. Here, an example is shown in which two lateral beams 20 connect the two side beams 10, but instead of the two lateral beams 20, a single lateral beam 20 having a large width dimension (dimension in the sleeper direction 110) is used. May be.

  A center pin 5 extending vertically downward from a vehicle body supported by the carriage is disposed in a space surrounded by the side beams 10 and the lateral beams 20 constituting the carriage frame, and the carriage frame (cart) is the center pin 5. It is arrange | positioned so that it can rotate in a horizontal surface centering on this. When the railway vehicle travels at a high speed, yawing that oscillates in a horizontal plane around the center pin may occur, so yawing is suppressed in a mode along the longitudinal direction of the side beam 10 that forms the bogie frame. A yodamper 30 is provided. The yaw damper 30 has one end in the longitudinal direction connected to the side beam 10 and the other end is a side beam (not shown, both ends in the width direction of the frame) that form a frame that forms the floor of the vehicle body. In particular, the occurrence of high-frequency yawing is suppressed and deterioration of riding comfort is suppressed.

  The cart shown in FIG. 1 is provided with a pair of yaw dampers 30 (only one is shown) at the center in the longitudinal direction of the side beam 10 constituting the cart frame and in a direction away from the center pin 5. The central portion in the longitudinal direction of the side beam 10 where the yaw damper 30 is disposed has a sleeper direction 110 (direction of the center pin 5) by a dimension D1 so that the entire carriage including the yaw damper 30 is within the vehicle limit range. ).

  A pair of air springs 60 (only one is shown) is provided on the upper surface of the central part in the longitudinal direction of the two side beams 10 constituting the carriage, and the vehicle body (not shown) is placed on the upper surface of the air spring 60. ing. The air spring 60 suppresses the vibration of the carriage accompanying the displacement of the track, the joint, the branch passage, and the like from directly propagating to the vehicle body. A central portion in the longitudinal direction of the side beam 10 constituting the bogie frame in order to dispose the air spring 60 or to lay pipes and wires provided in a manner straddling the bogie in the longitudinal direction of the vehicle body (rail direction 100). The height dimension is made lower by a height dimension D2 (dimension in the height direction 120) than the height dimension at both ends in the longitudinal direction of the side beam 10.

FIG. 3 is a plan view (corresponding to part B in FIG. 1) of a bogie frame provided for a railcar bogie according to the present invention, and FIG. 4 is a perspective view of the bogie frame provided for the railcar bogie according to the present invention. FIG.
The side beam 10 is a side surface on the opposite side of the side beam 10a to which the side beam 10a is connected to the first side beam 10a and the side beam 10a that are arranged over the entire length of the side beam 10 along the rail direction 100. It is comprised from the 2nd side beam 10b provided with the both ends of a longitudinal direction, and the baseplate 10c in which the 1st side beam 10a and the 2nd side beam 10b are mounted.

Second side beams 10b are provided on both sides of the side beam 10a in the longitudinal direction on the side opposite to the side beam 10a to which the horizontal beam 20 is connected. The second side beam 10b has a portion having a substantially constant vertical cross-sectional area in the longitudinal direction from the central portion in the longitudinal direction toward one end thereof, and in the longitudinal direction from the central portion in the longitudinal direction toward the other end portion. The part where the vertical cross-sectional area decreases is connected in series. The second side beam 10b is provided on the side of the first side beam 10a in such a manner that the portion where the vertical cross section in the longitudinal direction of the second side beam 10b decreases is directed to the central portion in the longitudinal direction of the first side beam 10a. ing. The shape of the second side beam 10b shown in the first embodiment and the aspect provided in the first side beam 10a are the same in the second and third embodiments.
With this configuration, the trapezoidal yaw damper mounting region 40 provided with the yaw damper 30 is formed on the side opposite to the side beam 10a to which the lateral beam 20 at the center in the longitudinal direction of the first side beam 10a is connected. .

  The first side beam 10a is a steel material having a cross-sectional shape (inverted U shape) including two vertical plate portions extending in the height direction from both widthwise end portions of the horizontal plate portion, and is formed by pressing. Has been. The second side beam 10b is a steel material having an L-shaped cross section composed of a horizontal plate portion and a vertical plate portion, and is a steel material formed by pressing or welding a plate material. The side beam 10c is a plate-shaped steel material.

  The side beam 10 welds the upper surface of the bottom plate 10c and the tip of the vertical piece of the first side beam 10a, the horizontal plate portion of the second side beam 10b to the first side beam 10a, and the second side beam 10b. It is assembled by welding the tip of the vertical plate to the bottom plate 10c. The front end portion of the cross beam 20 is abutted and welded to the center portion in the longitudinal direction of the side beam 10 assembled through the above steps. The horizontal beam 20 is composed of an upper plate, a lower plate, and a vertical plate that connects the upper plate and the lower plate, and a flange 20a and a front end of the horizontal beam 20 (parts abutted against the side beam 10) 20b.

  The bogie frame is configured by connecting the flanges 20 a and 20 b of the cross beam 20 to the center portion in the longitudinal direction of the side beam 10. The longitudinal ends of the side beam 10 (part C in FIG. 3) are a total of three vertical plates including two vertical plates provided in the first side beam 10a and one vertical plate provided in the second side beam 10b. A plate is provided, and has a strength capable of firmly supporting the wheel shaft 50 and a high vertical bending rigidity. The central portion (D portion in FIG. 3) in the longitudinal direction of the side beam 10 includes a total of three vertical plates: two vertical plates included in the first side beam 10a and a vertical plate constituting the flange 20b of the lateral beam 20. It is disposed and has a strength capable of firmly supporting the air spring 60 and a high vertical bending rigidity. Furthermore, the site | part (equivalent to E part of FIG. 3) where the high stress generate | occur | produces the cross beam 20 is made into a base material instead of a welding part, and the fall of the intensity | strength accompanying welding can be suppressed.

  The side beam 10 having a shape in which the center part of the side beam 10 is reduced in the direction of the center pin 5 by the dimension D1 in the sleeper direction 110 and the center part of the side beam 10 is reduced in the height direction 120 by the dimension D2 is described above. With this construction, a bogie frame having sufficient strength and rigidity can be suppressed while reducing the reduction in thickness, cracks, wrinkles, and dimensional accuracy of materials that occur during press molding, reducing the number of repair man-hours related to these problems. It is possible to manufacture a railcar bogie equipped with.

FIG. 5 is a perspective view showing another embodiment of the bogie frame used in the railway car bogie according to the present invention.
The side beam 10 includes a first side beam 10 a disposed over the entire length of the side beam 10 along the rail direction 100, and a side where the yaw dampers 30 at both ends in the longitudinal direction of the side beam 10 are disposed (lateral beam). And a second side beam 10b provided on the opposite side of the side provided with 20. The first side beam 10a is composed of a first side beam 10a1 and a first side beam 10a2, and the lateral beam 20 is connected to the central portion in the longitudinal direction of the first side beam 10a1.

  The first side beam 10a1 and the first side beam 10a2 are steel members having a C-shaped cross section including a vertical plate and horizontal plates extending from both ends in the height direction of the vertical plate, and are formed by pressing. . Similarly, the second side beam 10b is a steel material having a C-shaped cross section that opens to the side, and is a steel material that is molded by pressing.

  The side beam 10 is welded by first butting the top plate of the upper side plate and the lower side plate of the first side beam 10a1, and the top plate of the first side beam 10a2 and the tip of the lower side plate. As a result, a rectangular tube-shaped first side beam 10a (see FIG. 5) is formed. Next, the end portions of the upper and lower pieces of the second side beam 10b are butted against the side of the first side beam 10a2 forming the first side beam 10a and welded, so that the second side beam 10b becomes the first side beam. The side beams 10a are fixed to both sides in the longitudinal direction.

  The front end portion of the cross beam 20 is abutted and welded to the center portion in the longitudinal direction of the side beam 10a assembled by the above process. The horizontal beam 20 is composed of an upper plate, a lower plate, and a vertical plate that connects the upper plate and the lower plate, and a flange is provided at the tip of the horizontal beam 20 (the portion that abuts against the side beam 10). 20a and 20b are provided.

  Second side beams 10b are provided on both sides of the side beam 10a in the longitudinal direction on the side opposite to the side beam 10a to which the horizontal beam 20 is connected. With this configuration, the trapezoidal yaw damper mounting region 40 provided with the yaw damper 30 is formed on the side opposite to the side beam 10a to which the lateral beam 20 at the center in the longitudinal direction of the first side beam 10a is connected. .

  The bogie frame is configured by connecting flanges 20 a and 20 b provided in the cross beam 20 to a central portion in the longitudinal direction of the side beam 10. Both end portions in the longitudinal direction of the side beam 10 (corresponding to part C in FIG. 3) are two vertical plates provided in the first side beam 10a1 and the first side beam 10a2 and one vertical type provided in the second side beam 10b. A total of three vertical plates with the plate are arranged, and it has strength capable of firmly supporting the wheel shaft 50 and high vertical bending rigidity.

  The central portion in the longitudinal direction of the side beam 10 (corresponding to the D portion in FIG. 3) includes two vertical plates included in the first side beam 10a1 and the second side beam 10a2 and a vertical plate constituting the flange 20b of the side beam 20. A total of three vertical plates are arranged, and have strength capable of firmly supporting the air spring 60 and high vertical bending rigidity. Furthermore, the site | part (equivalent to E part of FIG. 3) where the high stress generate | occur | produces the cross beam 20 is made into a base material instead of a welding part, and the fall of the intensity | strength accompanying welding can be suppressed.

  The side beam 10 having a shape in which the center part of the side beam 10 is reduced in the direction of the center pin 5 by the dimension D1 in the sleeper direction 110 and the center part of the side beam 10 is reduced in the height direction 120 by the dimension D2 is described above. With this construction, a bogie frame having sufficient strength and rigidity can be suppressed while reducing the reduction in thickness, cracks, wrinkles, and dimensional accuracy of materials that occur during press molding, reducing the number of repair man-hours related to these problems. It is possible to manufacture a railcar bogie equipped with.

FIG. 6 is a perspective view showing still another embodiment of the bogie frame used in the railway car bogie according to the present invention.
The side beam 10 has a horizontal plate portion disposed over the entire length of the side beam 10 along the rail direction 100 and a vertical plate portion extending downward from one end portion in the width direction of the horizontal plate portion. The cross-sectional shape in the longitudinal direction is substantially L-shaped, and the other end portion in the width direction of the horizontal plate portion extends from the longitudinal center portion of the horizontal plate portion toward the horizontal beam. The first side beam 10a provided with the flange portion, and the second side provided on the side where the yaw dampers 30 at both ends in the longitudinal direction of the vertical plate portion of the side beam 10a are disposed (opposite the side where the horizontal beam 20 is provided). The side beam 10b, the vertical plate 10d extending from the longitudinal end of the first side beam 10a to the flange portion along the peripheral edge of the horizontal plate of the first side beam 10a, the first side beam 10a and the second side beam 10b and a bottom plate 10c on which a vertical plate 10d is placed.

  Second side beams 10b are provided on both sides of the side beam 10a in the longitudinal direction on the side opposite to the side beam 10a to which the horizontal beam 20 is connected. With this configuration, the trapezoidal yaw damper mounting region 40 provided with the yaw damper 30 is formed on the side opposite to the side beam 10a to which the lateral beam 20 at the center in the longitudinal direction of the first side beam 10a is connected. .

  The first side beam 10a is formed into an L-shaped cross section by pressing. The second side beam 10b is a steel material having an L-shaped cross section composed of a horizontal plate portion and a vertical plate portion, and is a steel material formed by pressing or welding a plate material. The side beams 10c and the vertical plate 10d are plate-shaped steel materials.

  The side beam 10 is assembled in the following procedure. First, one end of the vertical plate 10d is abutted against the peripheral portion of the horizontal plate portion along the peripheral portion of the horizontal plate portion extending from the longitudinal end portion of the horizontal plate portion of the first side beam 10a to the flange portion. Weld. Next, the other end portion of the vertical plate 10d and the end portion of the vertical plate portion of the first side beam 10a are welded to the upper surface of the peripheral portion of the bottom plate 10c. Next, the distal end portion of the horizontal plate portion of the second side beam 10b is welded to the connecting portion between the vertical plate portion and the horizontal plate portion of the first side beam 10a, and the distal end portion of the vertical plate portion of the second side beam 10b. Is welded to the upper surface of the bottom plate 10c.

  The front end portion of the lateral beam 20 is abutted and welded to the end portion of the flange portion provided at the center portion in the longitudinal direction of the side beam 10 assembled through the above steps. The cross beam 20 has a four-sided structure composed of an upper plate, a lower plate, and two vertical plates that connect the upper plate and the lower plate. In addition, the cross beam 20 is not limited to a four-sided structure, but may be configured by abutting members pressed into a C-shaped section, or a plate member and a member pressed into a U-shaped section. May be configured.

The bogie frame includes a flange portion 10a3 that extends integrally from the first side beam 10a at the center in the longitudinal direction of the side beam 10, and the horizontal beam 20 is connected to the end of the flange portion 10a3. . At both ends in the longitudinal direction of the side beam 10 (C portion in FIG. 3), there are a total of three vertical plates: a vertical plate portion provided in the first side beam 10a, a vertical plate provided in the second side beam 10b, and a vertical plate 10d. It is disposed and has a strength capable of firmly supporting the wheel shaft 50 and a high vertical bending rigidity. Further, since the flange portion 10a3 is integrally formed from the first side beam 10a1, a portion (corresponding to an E portion in FIG. 3) where the high stress is generated in the cross beam 20 is used as a base material instead of a weld portion. The accompanying strength reduction can be suppressed.
The side beam 10 having a shape in which the center part of the side beam 10 is reduced in the direction of the center pin 5 by the dimension D1 in the sleeper direction 110 and the center part of the side beam 10 is reduced in the height direction 120 by the dimension D2 is described above. With this construction, a bogie frame having sufficient strength and rigidity can be suppressed while reducing the reduction in thickness, cracks, wrinkles, and dimensional accuracy of materials that occur during press molding, reducing the number of repair man-hours related to these problems. It is possible to manufacture a railcar bogie equipped with.

DESCRIPTION OF SYMBOLS 5 ... Center pin 10 ... Side beam 10a ... 1st side beam 10b ... 2nd side beam 10c ... Bottom plate 10d ... Vertical plate 20 ... Horizontal beam 20a, 20b ... Flange 30 ... Yaw damper 40 ... Yaw damper attachment area 50 ... Wheel axis 100 ... Rail direction 110 indicating the direction of sleeper arrow 120 indicating the direction of sleepers 120 arrow indicating the direction of height

Claims (5)

Side beams spaced along the rail direction;
A lateral beam connecting the longitudinal center of the side beams;
A railcar bogie comprising a yaw damper that is provided at a central portion in the longitudinal direction of the side beam and suppresses yawing vibration of the bogie,
The side beams are
A first side beam connected to the lateral beam and disposed over the entire length of the side beam;
A second side beam provided on both ends of the first side beam in the longitudinal direction opposite to the first side beam to which the transverse beam is connected;
A carriage for a railway vehicle, comprising a yaw damper mounting region formed by the first side beam and the second side beam and to which the yaw damper is mounted. In the bogie for railway vehicles according to claim 1,
The bogie for a railway vehicle, wherein a height of a central portion in a longitudinal direction of the side beam is lower than heights of both end portions of the side beam. In the railcar bogie described in claim 1 or claim 2,
The side beams are
The first side beam having a C-shaped cross-section comprising a horizontal plate portion, and a vertical plate portion extending downward from both ends in the width direction of the horizontal plate portion;
The second side beam having an L-shaped cross-section comprising a horizontal plate portion and a vertical plate portion extending downward from one end in the width direction of the horizontal plate portion;
It is composed of a plate-like member with which both end portions of the vertical plate portion of the first side beam and the front end portion of the vertical plate portion of the second side beam abut,
The other end in the width direction of the horizontal plate portion of the second side beam is welded to the connecting portion between the one vertical plate portion of the first side beam and the horizontal plate portion of the first side beam. And
A bogie for a railway vehicle, wherein both end portions of the vertical plate portion of the first side beam and a front end portion of the vertical plate portion of the second side beam are welded to the plate-like member. . In the railcar bogie described in claim 1 or claim 2,
The side beams are
A rectangular tube in which members having a C-shaped cross-section, each having a vertical plate portion and a horizontal plate portion extending from both ends in the height direction of the vertical plate portion, are welded by abutting the front end portions of the horizontal plate portion. First side beams in the shape of
A second side beam having a C-shaped cross section comprising a vertical plate portion and a horizontal plate portion extending from both ends in the height direction of the vertical plate portion,
The tip of the horizontal plate portion of the second side beam is welded to the connecting portion between the vertical plate portion forming the first side beam and the horizontal plate portion of the first side beam. A rolling stock truck. In the railcar bogie described in claim 1 or claim 2,
The side beams are
An L-shaped cross section having a horizontal plate portion and a vertical plate portion extending downward from one end in the width direction of the horizontal plate portion,
A first side beam comprising: a flange portion extending from a central portion in the longitudinal direction of the horizontal plate portion to the side of the horizontal beam at the other end portion in the width direction of the horizontal plate portion;
The second side beam having an L-shaped cross-section comprising a horizontal plate portion and a vertical plate portion extending downward from one end in the width direction of the horizontal plate portion;
A vertical plate provided across the flange portion from the longitudinal end portion of the first side beam along the other end portion of the horizontal plate portion of the first side beam;
It is composed of a front end portion of the vertical plate portion of the first side beam, a front end portion of the vertical plate portion of the second side beam, and a plate-like member with which the vertical plate abuts.
The other end of the horizontal plate portion of the second side beam is welded to a connection portion between the vertical plate portion of the first side beam and the horizontal plate portion of the first side beam,
One end portion of the vertical plate in the height direction extends from the longitudinal end portion of the first side beam to the flange portion in a form along the one end portion of the horizontal plate portion of the first side beam. Welded across,
The other tip of the vertical plate of the first side beam, the tip of the vertical plate of the second side beam, and the other end of the vertical plate are welded to the plate member. A railcar bogie characterized by the above.

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