JP2001080512A - Bogie frame for rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light bogie frame for rolling stock having the simple structure easy to be manufactured by forming a side beam of an integrated formed body formed by connecting a side beam member and a spring cap part to each other. SOLUTION: A first side beam member 10a and a second side beam member 10b respectively having a U-shaped cross section are connected to each other so as to form a side beam body part 10. The first side beam member 10a and the second side beam member 10b form a rectangular closed cross section by joining edges of top surface parts 11a, 11b and edges of bottom surface parts 12a, 12b and spring cap projecting parts 20a, 20b to each other. The spring cap part 20 and the side beam body part 10 are integrally formed with each other through an arc opposite to an arc having the center inside of a bogie frame of the spring cap part 20, an arc having the center outside of the carrier, and an opposite arc in a boundary part between the side beam main body 10 formed with a linear rectangular top surface and the spring cap part 20 having the circular top surface. With this structure, quality of products is evened, and automatic welding is possible, and welding reliability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bogie frame of a railway vehicle, and more particularly to a bogie frame of a railway vehicle suitable for a material manufactured by press molding.

[0002]

2. Description of the Related Art The structure of a side beam of a bogie frame for accommodating an axle box supporting device is such that a spring cap portion is formed in a cylindrical or square tube shape in accordance with the shape of the coil spring of the axle box supporting device to be accommodated. It was connected to the side beam portion (see Japanese Patent Application Laid-Open No. 6-329021). This spring cap can be made as a cast or
Alternatively, it has a cylindrical or rectangular tube shape manufactured as a welded structure, and the lower surface has a closed portion for accommodating the shaft spring. On the other hand, the side beam main body is formed by pressing a plate material into a U-shaped channel and joining the flat-plate-side burr material to the opening position of the U-shaped channel by abutting or pressing the plate material. A side beam member having a U-shaped cross section in which a box-shaped cross section is halved was manufactured, and the side of the opening of the U-shaped cross section of each side beam member was butted and welded to manufacture a side beam main body. The side beams are formed by welding one by one each of the above-mentioned cast or welded cylindrical or square tube-shaped spring caps to both ends of the side beam main body.

[0003]

In the conventional bogie frame, when a vertical load is applied from the axle box support device, a bending load acts on the welded portion between the spring cap portion and the side beam main body. High stress is generated. In particular, the bending load of the side beam acts on the welded portion around the side burr in the direction intersecting the longitudinal direction of the side beam between the spring cap portion and the side beam main body portion. In this way, in the bogie frame in which the pressed product of the spring cap and the side beam body is welded and joined, high stress is generated in the welded joint due to sudden change in rigidity, so high welding quality is required, and the welding beat is carefully finished with a grinder. And the operation was complicated.

[0004] Further, since it is necessary to improve the accuracy of the combination of the spring cap portion and the side beam main body of the pressed product, careful attention must be paid to the positioning and restraint of each member, and a great deal of time, labor and skill are required. Required skill and work efficiency was poor.

Accordingly, an object of the present invention is to provide a bogie frame for a railway vehicle which has a simple structure, is easy to manufacture, and is lightweight.

[0006]

According to the present invention, a bogie for a railway vehicle includes a side beam member to which a cross beam is attached, and a spring cap portion for accommodating an axle box support device formed at both longitudinal ends of the side beam member. A structure is provided in which the side beam is formed by an integrally formed part in which the side beam member and the spring cap portion are continuous.

A truck of a railway vehicle according to a second aspect of the present invention comprises a side beam member and a spring cap member formed at both ends in a longitudinal direction of the side beam member in a convex shape by a continuous integral molding. And a second side beam member having the same shape is formed by abutting and joining the end faces of the openings.

According to a fourth aspect of the present invention, there is provided a bogie frame for a railway vehicle, wherein a U-shaped side beam member having a U-shaped cross section in a width direction, and a spring formed in a cylindrical shape at both longitudinal ends of the U-shaped side beam member. There is provided a configuration in which a side beam member made of a molding material formed by continuous integral molding of a cap member and a plate body that closes an opening are joined.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a bogie frame for a railway vehicle or the like according to the present invention will be described below with reference to the drawings. (Embodiment 1) FIGS. 1 to 4 show an embodiment of a bogie frame according to the present invention. FIG. 1 is a perspective view showing a spring cap portion and a part of a side beam main body portion, and FIGS. Is a plan view and a side view showing the entire side beam of the bogie frame, and FIG. 4 is a cross-sectional view showing a state in which the shaft spring, the axle box, and the axle beam are installed on the bogie frame including the spring cap portion and the side beam main body portion. .

And a cross beam (not shown).
The side beam 100 has a side beam main body 10 and a spring cap portion 20, and the side beam main body 10 has a hollow column shape, and a vertical cross section in the width direction thereof is formed in a box shape. The spring cap portions 20 are formed at both ends in the longitudinal direction of the side beam main body 10, and a storage space for vertically storing the coil spring 31 is formed.

The width dimension R ₁ of the side beam main body 10 is
0 narrower than the width R ₂ of the vertical (height) of the side beams body portion 10
Dimensions are configured higher than the vertical (height) dimension of H ₂ spring cap portion 20. A lateral beam is joined to the center of the side beam main body 10. The height H ₁ near the center is configured to be the highest. The lower surface of the side beam main body 10 is tapered so that the height of the beam main body 10 gradually decreases. That is, the upper surfaces of the side beam main body portion 10 and the spring cap portion 20 are configured to be flat, and the lower surface of the side beam main body portion 10 is configured so that both longitudinal ends are inclined with respect to the upper surface.

A shaft spring 31 and a shaft beam 30 which constitute the axle box support device are installed at the end of the side beam in the bogie traveling direction.
The shaft beam 30 has one end rotatably attached to the lower surface of the side beam main body 10. At the other end of the shaft beam 30 is formed an axle box for housing a bearing for rotatably supporting the axle,
A shaft spring 31 is provided above the shaft box. The shaft spring 31 is inserted and installed from below into the storage space of the spring cap portion 20 of the side beam 100. A shaft spring seat 32 is disposed between the shaft spring 31 and the upper surface of the spring cap 20. The bogie frame composed of the side beams and the cross beams is elastically supported by the shaft spring 31 with respect to the axle. In addition, the embodiment shown in this drawing is a side beam main body 10 and a spring cap 20.
Although the example in which the upper surface is configured to be flat is shown, a configuration in which the side beam main body 10 is provided with a step relative to the spring cap 20 may be adopted. Further, the vertical (height) dimension of the side beam main body 10 may be configured to be equal to the vertical (height) dimension H ₂ of the spring cap 20.

The side beam main body 10 comprises a first side beam member 10a and a second side beam member 10b having a U-shaped cross section. The first side beam member 10a and the second side beam member 10b have plane-symmetric shapes. The first side beam member 10a is formed by bending a long flat plate by bending both side edges in the width direction by press working.
An upper surface 11a and a lower surface 12a are formed on both sides of 3a.
Furthermore, squeezing the longitudinal opposite edges, deeply press-molded by plastic working overhang, forming the spring cap convex portion 20a of the semicircular around O ₁ having a center inside the member.
At this time, the boundary with the first side beam member 10a is opposite to the center O ₁ inside the member, and an arc of the center O ₂ having a center outside the member and an inverted arc portion 17 are provided. Similarly, a flat plate is bent by press working, drawn, and stretched out, and has a top surface 11b and a bottom surface 12b on both sides of a side surface 13b by plastic working. 17, the second side beam member 10b is formed.

The side beam main body 10 is formed by connecting the first side beam member 10a and the second side beam member 10b thus formed in a U-shaped cross section. At this time, the first side beam member 10a and the second side beam member 10b are
b, lower surface portions 12a, 12b, spring cap convex portion 20a,
The edges of 20b are butted and the butted portions are joined by means such as welding to form a rectangular closed cross section. The spring cap projections 20a and 20b are formed by joining their opening edges and joining them by means such as welding to form a cylindrical closed cross section. Thus, the spring cap projection 2
A side beam 100 in which the side beam members 10a and 10b integrally formed at both ends with 0a and 20b are joined by butt is a rectangular side beam main body 10 having a straight joint 15 as a center line,
A semicircular spring cap projection 20a, 2
The cylindrical spring cap portion 20 is formed by joining the butt portions 0b with each other. A spring cap portion 2 having a circular top surface is formed with respect to the side beam main body 10 having a rectangular top surface.
In the boundary portion with 0, the arc opposite to the arc centered inside the bogie frame of the spring cap portion 20, the arc centered outside the bogie frame, and the spring cap portion 20 via the inverted arc portion 17 The side beam main body 10 is integrally formed.

The cylindrical portion of the shaft spring seat 32 is inserted into the upper surface of the spring cap portion 20 of the side beam 100 thus configured in a state where the first and second side beam members 10a and 10b are butt-joined. The hole 21 to be formed is formed. In addition, a hole 22 is formed on the lower surface for inserting a shaft spring 31 made of a coil spring. Reinforcing means is provided at each welded portion.
That is, the first side beam member 10a and the second side beam member 10
b at the welding portion of the butted portion 15 with the upper surface portion 11a,
The upper back metal 4 is in contact with the back side of the butting portion 11b, and the lower back metal 5 is in contact with the butting portion of the lower surfaces 12a and 12b, and welding is performed from the surface of the side beam. Also,
The contact plate 7 is installed inside the upper surface of the spring cap 20,
The plate 7 is cut to form a surface for receiving the shaft spring seat 31.

As the reinforcement of the side beam main body 10, the side beam 100
The reinforcing member 2 is installed on the side beam main body side of the inverted circular arc portion 17 at the boundary portion between the spring cap portion 20 and the side beam main body portion 10. Reinforcement 2
Are welded to the inner surfaces of the side beam members 10a and 10b. Further, a plurality of reinforcing members 3 are installed inside the side beam main body 10, and upper surface portions 11 a and 11 b, side surface portions 13 a and 13 b, and lower surface portion 12 of the side beam members 10 a and 10 b.
a, 12b. These reinforcing members 3 have a shape divided into right and left by an upper backing metal 4 and a lower backing metal 5. The hole 6 in the side beam main body 10 corresponds to a cross beam joint, and a tubular cross beam is inserted. Around the hole 6, a cross beam reinforcing material 61 is provided.

In the first side beam member 10a and the second side beam member 10b manufactured by press-molding the flat plate member as described above, the upper back support 4, the lower back support 5, the support plate 7, The reinforcing member 2 and the reinforcing member 3 are the side beam members 10a and 10
b is welded in advance after press forming. And
After the first side beam member 10a and the second side beam member 10b in which each member is attached to a predetermined position are combined and butted,
The side beam 100 is formed by welding. After the butt welding of the side beam members 10a and 10b is completed, the respective holes 6, 21 and 22 are processed. And the horizontal beam joint hole 6
After the cross beam is inserted into the frame, the two are welded to complete the bogie frame.

In the bogie frame having such a configuration,
When a vertical bending load is applied to a portion of the side beam 100, the spring cap portion 20 and the side beam main body portion 10 are constituted by side beam members integrally formed continuously in the longitudinal direction of the side beam. There is no portion where the rigidity changes suddenly in the longitudinal direction of the side beam 100, and no stress concentration occurs. In particular, since the first side beam member 10a and the second side beam member 10b have a continuous welding line 15 in the longitudinal direction of the side beam 100, stress concentration is caused by a bending load acting on the side beam. This makes it possible to simplify the welding bead finishing process required for the conventional side beam. further,
On the side surfaces of the first side beam member 10a and the second side beam member 10b, a portion where the shapes of the spring cap portion 20 and the side beam main body portion 10 change is formed in an arc shape opposite to the arc of the spring cap portion 20. Is formed to prevent concentration of stress at a portion where the shape of the spring cap portion 20 and the shape of the side beam main body portion 10 change.

The side beam member 10a and the side beam member 10b
Since the spring cap portion 20 and the side beam main body portion 10 are integrally formed by press molding, the number of parts is small, and the upper backing backing 4, the lower backing backing 5, and the reinforcing member 2 are provided on the inner surface of the side beam member. , Reinforcement 3
After the attachment and the like, the first and second side beam members 10a and 10b are butt-welded to complete the side beam 100, thereby improving workability. Further, the first side beam member 10a and a second side beams 100 formed by combining the side beam member 10b has a narrow width dimension R ₁ side beam main body portion 10 than the width R ₂ of the spring cap 20 With the configuration (R ₂ > R ₁ ), the weight of the side beam 100 itself can be reduced.

(Embodiment 2) Next, Embodiment 2 will be described with reference to FIGS. 5, 6, and 7. FIG. In order to facilitate the press-forming operation of the U-shaped cross section of the side beam 200 of this embodiment, the end of the side beam is opened, and a press-formed product of the U-shaped cross section is butt-joined and then separately press-formed or welded. The closing plate formed by the structure is welded to close the opening. 1
The side beam members 10c and 10d having a U-shaped cross section are formed by bending both edges in the width direction of the plate members. Furthermore, the both ends in the longitudinal direction are deeply pressed to form the spring cap projections 20c and 20d. The shape of the spring cap projections 20c, 20d is such that a distal end opening 25 is formed when the first side beam member 10c and the second side beam member 10d are butt-joined. Then, a closing plate 10e that forms a cylindrical shape for storing the spring by covering the opening 25 is prepared by press molding, and is welded to the opening 25 to form the side beam 200 having a spring cap. Side beam 200 shown in this embodiment
Since the formation of the circular spring cap portion is made up of three members, the press forming becomes easy. The side beam 200 shown in this embodiment also has a configuration in which the side beam member and the spring cap are integrally formed, so that stress concentration with respect to the load acting on the side beam of the bogie is unlikely to occur.

(Embodiment 3) This embodiment will be described with reference to FIGS. 8, 9 and 10. FIG. The side beam 400 includes a side beam main body 40 having an inverted U-shaped cross section and a lower plate 45 for closing an opening. The side beam main body 400 is formed by pressing one sheet material to form a box-shaped side beam member 40 having a U-shaped cross section with one surface opened and five surfaces connected, and a lower plate 45 joined to the opening surface. Thus, the side beam 400 having a closed cross section is configured. At both ends in the longitudinal direction of the side beam member 40, the press depth is increased to form a cylindrical spring cap portion 43. Side beam member 40
A plurality of reinforcing members 3 are disposed on the inner surface of
The reinforcing member 2 is disposed at the boundary between the spring cap 43 and the spring cap 43.

FIGS. 9 and 10 show an overall view of a side beam 400 according to the configuration of this embodiment. Here, FIG. 9 is a top view, and a half thereof shows a state in which the upper plate is seen through. The side beam 400 has the side plate upper plate 430 of the spring cap 43 provided with a contact plate 71 disposed between the side beam upper plate 430 and the shaft spring seat. The width of the abutment plate 71 is sufficient to allow sufficient contact with the shaft spring seat, and the length in the longitudinal direction is extended from the end of the side beam to the contact portion with the shaft spring seat. And the length connected to the reinforcing member 2. With this configuration, the contact plate 71 is connected to the side beam lower plate 45 via the reinforcing member 2. When a load is applied to the bogie from the shaft spring, the side beam 400 receives the shaft spring received in the spring cap 43 and the shaft spring seat and the abutment plate 7.
1, the load is received by the side beam upper plate 430. However, since the reinforcing member 2 is configured to connect the contact plate 71 and the side beam upper plate 430, the load that the side beam upper plate 430 bears Is transmitted to the lower plate 45 via the reinforcing member 2, and the load is dispersed. At this time, the attachment position of the reinforcing member 2 is provided at an appropriate place in consideration of the load transmission from the spring cap portion 430.

The side beam member 40 is formed integrally with a spring cap portion, and there is no portion where the rigidity changes suddenly in the longitudinal direction of the side beam, so that stress concentration does not occur. The side beam member 40 of the side beam 400 does not have a joining line extending in the longitudinal direction.
1 is connected to the reinforcing member 2 to disperse the load and avoid concentration of stress. In this configuration, FIG.
As shown in FIG. 1, an opening 43B is formed at the tip of the spring cap portion 43A of the side beam member 40A, and the side beam member 40A and the lower plate 4 are formed.
After welding 5, the opening 43B is closed with a closing plate 43C,
A side beam 400A can also be used. This method of manufacturing the side beam 400A can facilitate the workability of the inverted U-shaped forming.

(Embodiment 4) This embodiment will be described with reference to FIG. The first side beam member 50a having an L-shaped cross section having a side wall portion 51a and an upper plate portion 53a, and the side wall portion 51b and the upper plate portion being pressed by pressing one sheet material. A second side beam member 50b having an L-shaped cross section and having 53b is formed. Then, the press depth is increased at both ends in the longitudinal direction, and the spring cap 55a and the spring cap 55
b is formed. Then, the edges of the upper plate portion 53a and the upper plate portion 53b of the first side beam member 50a and the second side beam member 50b are abutted to form a U-shaped cross section. And the side plate 500 which joins the bottom plate 57 to an opening part and forms a closed cross section is comprised.

Although this side beam 500 has one more component than the first embodiment, it facilitates press forming, and is continuously integrated in the longitudinal direction of the side beam 500 when a vertical bending load is applied. In the formed side beam member, stress concentration does not occur in the longitudinal direction of the side beam 500, and the first side beam member 50a and the second side beam member 50b
Since the welding line is continuously formed in the longitudinal direction of 0, stress concentration hardly occurs even with a bending load acting on the side beam 500.

As described above, since the spring cap portion and the side beam member are continuously formed by an integral molding press, the welded portion between the spring cap and the side beam body, which conventionally generates a high stress, is eliminated, and the bogie frame is formed. Quality can be improved. In addition, there is no need to perform the work of aligning the spring cap part and the side beam body before welding work, which can reduce the occurrence of irregularities due to welding of parts that directly affect the accuracy of the wheelbase diagonal, and improve reliability. I can do it.

[0027]

As described above, the bogie according to the present invention has the following advantages.
In addition, the number of parts constituting the side beams can be reduced, and the weight can be reduced. Conventionally, the welding of the spring cap and the side beam was done by hand welding, but by adopting the simple shape of the integrally molded product, uniformity of product quality and automatic welding by a robot are possible, improving welding reliability. I can do it.

[Brief description of the drawings]

FIG. 1 is a perspective view of a side beam according to the present invention.

FIG. 2 is a top view of a side beam according to the present invention.

FIG. 3 is a side view of a side beam according to the present invention.

FIG. 4 is an explanatory sectional view of a bogie frame according to the present invention.

FIG. 5 is a perspective view showing another embodiment of the side beam according to the present invention.

FIG. 6 is a top view of FIG. 5;

FIG. 7 is a side view of FIG. 5;

FIG. 8 is a perspective view showing another embodiment of the side beam according to the present invention.

FIG. 9 is a top view in which a part of FIG. 8 is seen through;

FIG. 10 is a side view of FIG. 8;

FIG. 11 is a perspective view showing another embodiment of the side beam according to the present invention.

FIG. 12 is a perspective view showing another embodiment of the side beam according to the present invention.

[Explanation of symbols]

 2, 3 Reinforcement member 4 Upper backing metal 5 Lower backing metal 6 Cross beam joining hole 7 Applicable plate 10, 40, 50 Side beam body 10a, 10b, 10c, 10d Side beam member 11a, 11b Upper surface portion 12a, 12b Lower surface portion 13a, 13b Side surface 15 Welding line 17 Inverted arc portion 20a, 20b Spring cap projection 21, 22 hole 25 Opening 30 Axle beam 31, 32 Seat 35 Side beam lower plate 43 Hat portion 43B Opening 43C Closure plate 45 Plate 51a, 50b Side wall Part 53a, 53b Upper plate part 57 Bottom plate 61 Cross beam part reinforcement 71 Applicable plate 100, 200, 400, 500 Side beam

Claims (6)

[Claims] 1. A side beam provided with a side beam member to which a cross beam is attached, a side cap member provided at each longitudinal end of the side beam member to accommodate an axle box support device, and a side beam arranged in parallel. In a bogie frame for a railroad vehicle comprising a horizontal beam, the side beam is a bogie for a railroad vehicle comprising a side beam member and a spring cap portion formed of a continuous integral molded part. 2. A side beam having a side beam member to which a cross beam is attached, a side beam provided with a spring cap portion formed at both ends in the longitudinal direction of the side beam member for accommodating an axle box support device, and a side beam arranged in parallel. In the bogie frame of a railway vehicle comprising a cross beam, the side beam is formed of a continuous integrally formed molding material of a side beam member and a spring cap member formed at both ends in a longitudinal direction of the side beam member. A side beam member, a side beam member, and a spring cap member formed at both ends in the longitudinal direction of the side beam member in a protruding shape. The beam is a bogie frame of a railway vehicle formed by joining a first side beam member and a second side beam member. 3. The first side beam member and the second side beam member have a U-shaped cross section in the width direction, and the side beam is formed of the first side beam member and the second side beam member.
3. The bogie frame for a railway vehicle according to claim 2, wherein the open end faces of the side beam members are joined to each other. 4. A side beam provided with a side beam member to which a cross beam is attached, and a side beam provided with spring cap portions formed at both ends in the longitudinal direction of the side beam member for accommodating an axle box support device, and side beams arranged in parallel. In a bogie frame for a railway vehicle comprising a cross beam, a side beam is a U-shaped side beam member having a U-shaped cross section in a width direction, and a spring formed in a cylindrical shape at both longitudinal ends of the U-shaped side beam member. A side beam member comprising a hat member and a molded member formed by continuous integral molding, and a plate closing an opening, wherein the side beam is formed by joining the side beam member and the plate. Bogie frame. 5. The bogie frame for a railway vehicle according to claim 1, wherein a boundary portion between the side beam main body and the spring cap portion has a two-dimensional curved surface. 6. The bogie frame for a railway vehicle according to claim 1, wherein the spring cap has an opening that opens in the width direction, and the opening is closed by a closing plate. .