JP3868203B2 - Pillow beam / floor connection structure in railcar frame - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pillow beam / floor coupling structure in a frame supported by various carts such as a bolsterless cart of a railway vehicle.
[0002]
[Prior art]
10 and 11 show the relationship between the bolsterless cart and the frame. The bolsterless carriage a generally includes a pulling portion d at the center in the left-right direction of the main body c connecting the central portions of the left and right side beams b, b, left and right ends of the main body c, and left and right side beams b. The frame f of the vehicle body is supported by air springs e and e at the center in the front-rear direction of b. In order to receive the support of the bolsterless carriage a, the underframe f has a pillow beam h made of a single piece passed to the left and right between the side beams g. The center plate d1 of the pulling portion d shown in FIGS. 9 and 10 is fastened to the lower surface of the pillow beam h by a bolt d2, and the center plate center pin d3 protruding to the center of the center plate is a hole shown in FIGS. The air springs e and e are connected to both ends of the lower surface of the pillow beam h and are elastically supported mainly in the vertical direction by being fitted to d4 and receiving a longitudinal force from the bolsterless carriage a side. The longitudinal force and the longitudinal force when the vehicle body travels are transmitted by transmitting the longitudinal force.
[0003]
Such a bolsterless carriage a has a simple structure and improved support performance compared to the bolster carriage, and is widely used.
[0004]
[Problems to be solved by the invention]
However, recently, abnormal noise is generated from the lower part of the vehicle body during the running of the vehicle. This is particularly remarkable in the vehicle body supported by the bolsterless carriage a as described above. This abnormal noise is often generated when the vehicle suddenly accelerates or decelerates, when the vehicle moves from a straight road to a curved road, and conversely, when the vehicle moves from a curved road to a straight road. When the present inventors conducted various experiments and studies on the bolsterless carriage a as described above for the generation of this abnormal noise, it was found that the part was the pillow beam h of the underframe f and the floor j supported by this. found. As a result of further investigations on the cause of the abnormal noise, it was found that the difference was caused by repeated sliding and colliding of the relatively wide upper surface of the pillow beam h, for example, 2496 mm × 740 mm, and the lower surface of the floor j opposite to the upper surface. It was found that sound was generated.
[0005]
Therefore, when the connection structure between the pillow beam h and the floor j in this part was examined, the pillow beam h has a wide surface, but the relationship that can be assembled to the underframe f as a single unit formed of a shape material or the like. The weld joints k shown in FIGS. 9 and 10 applied to the floor j with the through-shaped member over the entire length of the vehicle body are only on both sides and both sides of the pillow beam h. The upper surface has a structure in which the lower surface of the floor j is not joined to almost the four-round position. This is a special circumstance caused by, for example, a light metal hollow large shape being used for a frame or a floor.
[0006]
Accordingly, the strength around the frame f in the above-described traveling situation in which abnormal noise of the vehicle body occurs is reviewed, and the upper pillow plate h1 that forms the upper surface of the pillow beam h and the lower floor plate j1 that forms the lower surface of the floor j. We observed and observed the behavior. As a result, it was found that although there is no problem in strength, the pillow beam upper plate h1 and the underfloor plate j1 are deformed due to insufficient deformation rigidity under the above-described vehicle running condition.
[0007]
That is, since the pillow beam upper plate h1 and the underfloor plate j1 are both plate-like parts, depending on the load conditions acting on the vehicle body, torsional deformation may occur and the plate may be deformed in the out-of-plane direction. For example, when a brake is applied to a traveling vehicle body, a force in the longitudinal direction of the vehicle body acts on the pillow beam h from the carriage a. At that time, the pillow beam h receives a torsional load on the entire cross section. For this reason, the pillow beam upper plate h1 is deformed out of plane and slides or suddenly collides with the underfloor plate j1 which is in contact with a slight air gap, and abnormal noise is generated. As another example, when a vehicle body enters a curved road from a straight road, the track surface of the track must pass through a track that transitions from a straight road horizontal in the left-right direction to a curved road inclined in the left-right direction. Since the raceway surface at such a location is a torsional surface, the vehicle body passing there is twisted. At this time, both the pillow beam h and the floor j are twisted under a torsional load. Then, both the pillow beam upper plate h1 and the underfloor plate j1 are deformed out of plane, so that they slide or collide with each other to generate an abnormal noise.
[0008]
In order to cope with this, the present inventors correspond to the central region that leaves the end regions on both sides of the upper surface of the pillow beam h at the stage of the floor j integrally joined including the side beam g of the through-shaped member. A rectangular window m is formed by cutting out the part first, and a support frame q is fitted into the window m, and a welded joint k is provided between the front and back rims of the window m to be coupled. The support frame q is a rectangular frame n in which a box material n1 is arranged and connected to each other, a central bone o parallel to one direction is arranged, and a welded joint k is provided at the abutting boundary with the frame n and coupled. It is. In order to apply and connect the pillow beam h to the floor j configured as described above, the welded joint k is provided between the both sides of the pillow beam h, the both sides and the floor, and the top surface of the pillow beam h. And a welded joint k is applied to the abutting boundary between the frame n and the middle bone o and the upper surface of the pillow beam h, and finally the auxiliary floor plate p that covers the window m is attached to the support frame q. In this case, an attempt was made to connect the periphery of the floor j to the edge of the window m on the floor j by applying a weld joint k. Accordingly, the upper surface of the pillow beam h and the lower surface of the floor j are prevented from sliding and colliding with each other due to the fact that they are not joined in a wide range, so that no abnormal noise can be generated. It was confirmed that there was no doubt the cause of the abnormal noise considered by the present inventors.
[0009]
However, in such an improved structure, the floor j made of the breakthrough threading material is divided at the window m portion, the rigidity of the threading material is lowered, the number of members and the number of operations are large, and the cost is significantly increased. Because it does not endure practical use.
[0010]
An object of the present invention is to provide a pillow beam / floor coupling structure in a railcar frame that can prevent abnormal noise from being generated by a simple improved structure.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the pillow beam / floor coupling structure in the undercarriage of the railway vehicle of the present invention includes a pillow beam upper plate that forms the upper surface of a pillow beam made of a single piece supported by various carts, The underfloor plate that forms the lower surface of the floor made of a profile placed on the upper plate of the pillow beam is welded to both sides of the upper plate of the pillow beam and both side edges and the lower surface of the underfloor plate. In the combined pillow beam / floor structure in the frame of the combined railway vehicle, the pillow beam upper plate and the lower floor plate are plate-shaped between the center portion in the width direction excluding both sides on the upper surface of the pillow beam upper plate and the floor. The present invention is characterized in that a gap is formed to prevent the upper and lower floor plates from sliding and colliding with each other due to out-of-plane deformation .
[0012]
In such a configuration, the gap provided in the central portion in the width direction between the upper surface of the upper plate of the pillow beam and the lower surface of the lower floor plate, excluding the side portions where the pillow beam is joined to the floor, Even if the entire cross section is twisted and the pillow beam upper plate and the underfloor plate are plate-shaped, they may be deformed out of plane, and the out-of-plane deformation causes the pillow beam upper plate and the underfloor plate to slide together. Prevents collisions, so no abnormal noise is generated.
[0013]
The gap can be formed by a recess formed on the upper surface of the pillow beam upper plate, or can be formed by a spacer sandwiched between the pillow beam and the floor. In any case, the structure and assembly of the underframe are not particularly complicated and do not cause an increase in cost. In particular, in the case of a recess, there is an advantage that can be dealt with by selecting a cross-sectional shape at the time of extrusion forming for forming a shape of a pillow beam. No matter how the concave portion is formed, if the pillow beam is formed so as to be positioned higher than the height dimension required for strength and rigidity, there will be a problem in strength and rigidity due to the presence of the concave portion. There is nothing. Further, according to the spacer, there is an advantage that a simple plate material may be sandwiched, and the spacers can be simultaneously bonded by welding and joining the pillow beam and the floor.
[0014]
In addition to the above configuration, it is further provided at the center of the upper plate of the pillow beam so as to fit the center pin of the lower plate of the pillow beam at the center of the lower plate of the pillow beam so as to fit the center plate center pin of the traction portion of the bolsterless carriage. One hole is provided opposite the center hole, or the center part of the upper plate of the pillow beam is fitted with the center pin of the lower plate of the pillow beam and the center pin of the central part of the traction portion of the bolsterless carriage. One hole is provided opposite to the hole provided in this manner, and one hole is provided opposite to the air spring air supply seat mounting holes at both ends of the pillow beam between the pillow beam and the floor. A metal plate is provided for closing the one hole from above and filling the gap in the vicinity of the one hole. The metal plate is joined to the floor by a welded joint between its peripheral portion and the lower surface of the floor. The welded joint between the lower surface and the edge of the other hole It can be made to be coupled to the beam.
[0015]
According to such a configuration, the portion of the one hole that is opposite to the hole that fits with the center pin of the center plate of the bolsterless carriage in the wide gap formed between the upper plate and the underfloor plate, At one hole part and the air spring air supply seat mounting hole part at both ends of the pillow beam, the pillow beam receives the longitudinal force from the pulling part of the underframe or is supported by this part and the air spring. The center part of the upper plate of the pillow beam corresponding to the portion to be connected is connected to the under floor plate and the metal plate, so that the torsional deformation of the upper plate of the pillow beam and the under floor plate is suppressed, and the decrease in rigidity due to the gap is compensated. be able to. In addition, the metal plate has a welded joint between the bottom surface of the floor under the floor material before being attached to the pillow beam, and the center of the traction portion on the bottom plate of the pillow beam when the floor material is placed on the pillow beam. It is only necessary to make a welded joint between the hole edge of the top plate of the pillow beam through a hole that fits into the center pin of the plate, and the structure and assembly are not particularly complicated, and it does not cause an increase in cost. .
[0016]
The present invention is particularly effective when the pillow beam and the floor are made of a light metal shape that is likely to generate the above-mentioned noise, especially a hollow shape.
[0017]
Further objects and features of the present invention will become apparent from the following detailed description and drawings. Each feature of the present invention can be used alone or in combination in various combinations as much as possible.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the pillow beam / floor coupling structure in the undercarriage of the railway vehicle according to the embodiment of the present invention will be described with some examples with reference to FIG. 1 to FIG. 5 for the understanding of the present invention.
[0019]
The present embodiment has a pillow beam 2 using a hollow large shape member 1 made of light metal such as aluminum as shown in FIGS. 1 to 5 and a bolsterless carriage 7 having a pulling portion 6 as shown in FIG. In the railcar frame 3 that is supported by the vehicle and transmits the longitudinal force, the floor 5 using the hollow large shape member 4 made of light metal such as aluminum and supported by the frame 3 and the pillow beam 2 It is an example in the case of combining. However, the present invention is not limited to this, and the pillow frame 2 and the floor 5 which are formed as a single unit using various shapes and the like in a frame supported by various carts are used as pillows. Pillow beam / floor coupling structure having a structure in which welded joints are applied to the floor 5 on both sides 2a1 and both ends 2a2 of the pillow beam upper plate 2a in the beam 2 and no welded joints are applied to the other parts. It is effective in general application.
[0020]
As described above, the underframe 3 has a relatively large pillow beam 2 that passes between the side beams 11 and 11 in order to receive support from the bolsterless cart and various types of carts. The pillow plate 2 is fastened to the bottom plate 12 of the pulling portion 6 with a bolt 13 on the lower surface, and the center plate center pin 14 protruding in the center of the plate 12 is a pillow plate lower plate 2b in the pillow beam 2 shown in FIG. Are fitted into the holes 15 formed in the upper and lower ends of the bolsterless carriage 7 and receive a longitudinal force from the bolsterless carriage 7 side. The longitudinal force and the longitudinal force are transmitted when the vehicle body travels by being supported and transmitted by the traction unit 6.
[0021]
However, the pillow beam upper plate 2a of the pillow beam 2 and the underfloor plate 5a of the floor 5 in the underframe 3 are welded to the both sides 2a1 and both end sides 2a2 of the pillow beam upper plate 2a and the underfloor plate 5a of the floor 5. In the structure that is coupled only at the portion 16, as described above, abnormal noise is generated between the pillow beam upper plate 2a and the underfloor plate 5a during the traveling of the vehicle body.
[0022]
Therefore, in this embodiment, as shown in the examples of FIGS. 1 and 2 and the example of FIG. 3, the pillow beam upper plate 2 a that forms the upper surface of the pillow beam 2 and the underfloor plate 5 a that forms the lower surface of the floor 5. In the pillow beam / floor joint structure in which the weld joint 16 is provided between the side surface of the pillow beam upper plate 2a and the lower surface of the floor lower plate 5a, the width excluding the two side edges 2a1 on the upper surface of the pillow beam upper plate 2a A gap 21 is formed between the direction center portion 2a3 and the underfloor plate 5a.
[0023]
As described above, the longitudinal direction of the pillow beam 2 provided at the center portion 2a3 in the width direction excluding the two side portions 2a1 where the pillow beam 2 is coupled to the floor 5 between the upper surface of the pillow beam upper plate 2a and the lower surface of the floor lower plate 5a. Even if the gap 21 vertically passes through the entire cross section of the pillow beam 2 and the pillow beam upper plate 2a and the underfloor plate 5a are plate-shaped, they may be deformed out of plane. The pillow beam upper plate 2a and the underfloor plate 5a are prevented from sliding and colliding with each other, so that no abnormal noise is generated. Therefore, the gap 21 only needs to prevent such sliding and collision due to the out-of-plane deformation between the pillow beam upper plate 2a and the under-floor plate 5a, and should be larger than the sum of the maximum values of the two out-of-plane deformations on the side approaching each other. That's fine. This differs depending on the relationship between the vehicle body and the bolsterless carriage 7, the relationship between the pillow beam and the floor, and therefore varies depending on the vehicle type. However, in the experience of the present inventors, about 5 mm is sufficient in the relationship between the pillow beam 2 and the floor 5 using a hollow shape made of light metal. However, the size of the gap 21 can be set in any way, such as when the conditions differ due to changes in the vehicle type or design.
[0024]
The gap 21 can be formed by a recess 22 formed on the upper surface of the pillow beam upper plate 2a in the pillow beam 2 as shown in the above example. However, it can also be formed by a spacer sandwiched between the pillow beam 2 and the floor 5 (not shown). In any case, the structure and assembly of the underframe 3 are not particularly complicated and do not cause an increase in cost. In particular, in the case of the concave portion 22, there is an advantage that can be dealt with by selecting a cross-sectional shape at the time of extrusion forming for forming the profile 1 of the pillow beam 2. 1 and 3 in which the pillow beam 2 has a height dimension required for strength and rigidity, for example, 140 mm or more in the standard specification and 150 mm in the high-speed vehicle specification, regardless of how the recess 22 is formed. It forms so that it may be located more than H shown. According to this, there is no problem in strength and rigidity due to the presence of the recess 22. Further, according to the spacer, a simple plate material may be sandwiched, and there is an advantage that the spacers are simultaneously coupled by welding and joining the pillow beam and the floor. However, the concave portion 22 is not necessarily provided on the pillow beam 2 side from the principle of preventing abnormal noise, and may be provided on the lower surface of the floor 5.
[0025]
In the example of FIGS. 1 and 2, the center of the traction portion 6 in the bolsterless carriage 7 is further provided in the center of the pillow beam upper plate 2 a of the pillow beam 2 and in the center of the pillow beam lower plate 2 b forming the lower surface of the pillow beam 2. The other hole 23 provided opposite to the hole 15 provided so as to be fitted to the dish center pin 14 is provided, and the one hole 23 is closed from above between the center portion of the pillow beam 2 and the floor 5. A metal plate 24 that partially fills the gap 21 is provided. This metal plate 24 is joined to the floor 5 by a welded joint 25 provided between the peripheral portion and the lower surface of the floor 5, and welded between the lower surface and the inner peripheral surface of the one hole 23. The joint 26 is coupled to the pillow beam 2.
[0026]
As a result, the pillow beam upper plate 2a corresponding to the portion where the pillow beam 2 receives the longitudinal force from the pulling portion 6 of the underframe 3 in the wide gap 21 between the pillow beam upper plate 2a and the under floor plate 5a. Is connected to the underfloor plate 5a via the metal plate 24, torsional deformation of the pillow beam upper plate 2a and the underfloor plate 5a can be suppressed, and a reduction in rigidity due to the gap 21 can be compensated. Moreover, the metal plate 24 has a welded joint 25 between the lower surface of the underfloor plate 5a and the peripheral portion of the profile 4 before being attached to the pillow beam 2, and the profile 4 of the floor 5 is placed on the pillow beam 2. It is only necessary to provide a welded joint 26 between the mouth edge of the hole 23 provided in the pillow plate upper plate 2a through the hole 15 that fits the center plate 14 of the pull plate 6 of the pulling portion 6 in the pillow plate lower plate 2b. The structure and assembly are not particularly complicated and do not cause an increase in cost. The metal plate 24 is made of the same material as the pillow beam 2 and the floor 5 in the welded structure. Therefore, in this embodiment, the metal plate 24 is preferably made of aluminum. For example, the width of the recess 22 is 560 mm, whereas the width dimension of the recess 22 of the metal plate 24 is Is about 180 mm, and the longitudinal direction of the pillow beam 2 may be the same dimension, or may be shortened as shown in the figure. In some cases, the length may be increased.
[0027]
As shown in the left end portion of the pillow beam 2 in FIG. 4, the metal plate 24 utilizes a hole 17 for connection with the air spring and a hole 23 provided in the pillow beam upper plate 2 a opposite thereto, It can also be provided at both ends where the air spring of the pillow beam 2 is connected.
[0028]
As shown in FIGS. 1 and 2, the pillow beam 2 of the present embodiment has two aluminum extruded extruded members having the same cross-sectional shape symmetrically attached to each other and the pillow beam upper plates 2a and the pillow. What is integrally joined by a welded joint portion 31 provided between the lower beam plates 2b is adopted, and the pillow beam upper plate 2a and the pillow beam upper plate 2a are projected to the outside of the three hollow portions 32 arranged side by side. The both sides 2a1 of the shape are formed. And the recessed part 22 is formed in the area | region between this flange-shaped both-sides 2a1, and has the design which does not have a problem in intensity | strength substantially. The metal plate 24 of the one hole 23 corresponding to the center plate 14 is formed in a quadrangular shape having a size close to the diameter of the hole 23, and between the portions connected to the lower surface of the floor 5. The increase in distance is suppressed as much as possible, so that it is unlikely that an abnormal noise will occur secondarily in a portion where a load is easily applied due to the longitudinal force from the traction portion 6. The metal plate 24 in the part of the hole 23 corresponding to the air spring is made larger than that of the part corresponding to the center plate center pin 14 with respect to the diameter of the hole 23. Note that the pillow beam 2 may be formed in any shape, but it is preferable that the pillow beam 2 has an integrated structure in terms of strength, and is already formed integrally at the stage of assembling the frame 3 in terms of assembly workability. It is preferable.
[0029]
Further, as shown in FIG. 5, the shape 4 of the floor 5 is formed so as to be a hollow shape having five aluminum truss cross-sections on the left and right sides. And the side beam 11 are integrally coupled by a weld joint 29. However, the cross-sectional shape 4 of this floor 5 may be used, but if it is provided through as described above, the number of parts is reduced and the rigidity of the vehicle body is improved.
[0030]
【The invention's effect】
According to the present invention, as is apparent from the above description, the pillow is provided by a gap provided between the upper surface of the upper plate of the pillow beam and the lower surface of the underfloor plate except for the side portions where the pillow beam is joined to the floor. Even if the beam and floor are twisted and the pillow beam upper plate and underfloor plate are plate-shaped, they may be deformed out of plane. , It is possible to prevent the occurrence of abnormal noise by preventing collisions.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part showing one example of a coupling structure between a pillow beam and a floor in a railcar frame according to an embodiment of the present invention.
2 is a cross-sectional view showing a coupling structure between a pillow beam and a traction portion of a bolsterless carriage in the coupling structure portion of FIG. 1;
FIG. 3 is a cross-sectional view of a main part showing another example of a coupling structure between a pillow beam and a floor in a railcar frame according to an embodiment of the present invention.
4 shows the relationship between the pillow beam, the floor, the concave portion, and the metal plate in the frame that employs the pillow beam / floor coupling structure of the example of FIG. 1 and FIG. FIG.
FIG. 5 is a cross-sectional view of the underframe of FIG.
FIG. 6 is a plan view of a main part of a frame and a floor showing a previous improvement example.
7 is a cross-sectional view of FIG. 6. FIG.
8 is a cross-sectional view seen in a direction crossing the pillow beam of FIG. 7;
FIG. 9 is a cross-sectional view of a main part showing a pillow beam / floor coupling structure in a conventional railcar frame.
10 is a cross-sectional view showing a coupling structure between a frame and a bolsterless cart adopting the pillow beam / floor coupling structure of FIG. 9;
11 is a plan view of the main part of FIG.
[Explanation of symbols]
1, 4 Profile 2 Pillow beam 2a Pillow beam upper plate 2b Pillow beam lower plate 2a1 Both sides 2a2 Both ends side 2a3 Center part in width direction 3 Underframe 5 Floor 5a Under floor plate 6 Pulling unit 7 Bolsterless cart 12 Core plate 14 Core plate Center pin 15, 23, 27 Hole 16, 25, 26 Welded joint 21 Clearance 22 Recess 24 Metal plate

Claims (6)

The pillow beam upper plate that forms the upper surface of the pillow beam that is supported by the carriage, and the floor floor plate that forms the lower surface of the floor that is placed on the pillow beam upper plate, In the pillow beam / floor connection structure in the undercarriage of the railway vehicle connected by the welded joint provided between the both sides and both sides and the lower surface of the underfloor plate,
Between the center part in the width direction excluding both sides on the upper surface of the pillow beam upper plate and the floor, the pillow beam upper plate and the lower floor plate are deformed by out-of-plane deformation due to the plate shape of the pillow beam upper plate and the floor lower plate. Pillow beam / floor connection structure in the underframe of a railway vehicle, characterized in that a gap is formed to prevent sliding and collision .   In the center of the pillow beam upper plate, there is now one hole facing the hole provided in the center of the pillow beam lower plate that forms the lower surface of the pillow beam so that it fits with the center plate center pin of the pulling part in the bolsterless cart The center of the upper plate of the pillow beam, or the center of the lower plate of the pillow beam that faces the lower plate of the pillow beam is opposed to the hole provided so as to fit the center pin of the center plate of the traction portion of the bolsterless carriage. One hole is provided opposite to the air spring air supply seat mounting holes at both ends of the pillow beam, and each of the holes is provided between the pillow beam and the floor so that the one hole is closed from above. A metal plate is provided in the vicinity of the one hole, and the metal plate is joined to the floor by a welded joint formed between the peripheral portion and the lower surface of the floor. 2. The pillow beam is connected by a welded joint between the edges. Pillow beams, floor coupling structure in the railway vehicle underframe.   The pillow beam / floor coupling structure in a railcar frame according to any one of claims 1 and 2, wherein the gap is formed by a recess formed on the upper surface of the pillow beam upper plate.   The pillow beam / floor coupling structure in the undercarriage of a railway vehicle according to claim 3, wherein the recess is formed so as to be positioned at a height greater than a required height dimension of the pillow beam.   The pillow beam / floor coupling structure in a railcar frame according to any one of claims 1 and 2, wherein the gap is formed by a spacer sandwiched between the pillow beam and the floor.   The pillow beam / floor coupling structure in a railcar frame according to any one of claims 1 to 5, wherein the pillow beam and the floor are made of a light metal shape.

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