WO2017104052A1

WO2017104052A1 - Body bolster and railroad vehicle structure provided with same

Info

Publication number: WO2017104052A1
Application number: PCT/JP2015/085374
Authority: WO
Inventors: 翔太栗木; 充雄岩崎; 博桧垣; 敏彦用田; 忠正金保; 武市　通文; 寛越智
Original assignee: 株式会社日立製作所; 東レ株式会社
Priority date: 2015-12-17
Filing date: 2015-12-17
Publication date: 2017-06-22
Also published as: JPWO2017104052A1; JP6535757B2; EP3392118A4; EP3392118B1; EP3392118A1

Abstract

The purpose of the present invention is to provide a highly-reliable, lightweight body bolster allowing a reduction in life cycle energy and a railroad vehicle structure provided with the body bolster. The present invention provides: a body bolster (14) which is characterized by comprising a metal core material (50) and composite materials (33, 35) sealing the metal core material (50); or a railroad vehicle structure provided with the body bolster.

Description

Pillow beam and rail vehicle structure including the same

The present invention relates to a plate-like pillow beam that forms a frame that forms the floor surface of the rail vehicle structure and is provided on the lower surface of the frame along the sleeper direction, and a rail vehicle structure that includes the plate-shaped pillow beam.

In general, a rail vehicle structure (hereinafter referred to as a structure) is a stand frame that forms a floor, side structures that are erected at both ends in the width direction of the cradle, and both ends in the longitudinal direction of the cradle. This is a hexahedron structure composed of a house structure and a side structure and a roof structure disposed at the upper end of the wife structure. In a later manufacturing process, a bogie that travels on the track is provided on the lower surface of both ends in the longitudinal direction of this structure, and various electrical equipment that supplies electric power for driving the bogie and interior parts such as seats and lighting devices are provided. Provided.

The frame is mainly provided along side beams provided along the longitudinal direction at both ends in the width direction of the frame, end beams connecting the longitudinal ends of the side beams, and the end beams. And a pillow beam that is spaced apart by a predetermined size on the side of the central portion in the longitudinal direction of the structure, and a coupler for connecting the end beam and the pillow beam along the longitudinal direction of the structure and connecting the vehicles to each other It is comprised from the middle beam provided with.

The center pin provided in a manner that hangs downward on the lower surface of the pillow beam forming the structure (base frame) is connected to the bogie frame forming the cart via a traction device having a connecting link. Since the propulsive force during acceleration and deceleration of the rail vehicle is transmitted from the carriage to the pillow beam of the frame that forms the structure through the traction device and the center pin, the pillow beam has high strength and rigidity. It is necessary to prepare. Patent Document 1 discloses a railway vehicle structure having the above-described structure.

International Publication No. 2013/157464

高まり Due to the growing concern about environmental issues, there is a strong demand for reduction of life cycle energy, which is the total amount of energy in each stage of procurement, production, use (operation), and reuse. Since the weight reduction of the structure contributes to resource saving and energy saving during operation, it is possible to reduce the energy used for procuring and manufacturing, which occupies most of the life cycle energy.

Furthermore, since the weight reduction reduces the impact on the track when the rail vehicle travels, the track maintenance cost can be reduced.

In order to promote weight reduction, the structure has been manufactured with a hollow extruded shape made of aluminum alloy. However, the current hollow extruded shape having two face plates and a plurality of ribs connecting these face plates is thinned to the limit of the extrusion capability, and it is becoming difficult to further reduce the weight. .

An object of the present invention is to provide a lightweight pillow beam that is highly reliable and capable of reducing life cycle energy, and a rail vehicle structure including the pillow beam.

In order to solve the above-mentioned problems, one of the pillow beams constituting the frame of the typical rail vehicle structure of the present invention is composed of a metal core material and a composite material provided along the core material. The above-mentioned problem can be solved by a rail vehicle structure including this pillow beam.

According to the present invention, it is possible to provide a lightweight pillow beam that is highly reliable and capable of reducing life cycle energy, and a rail vehicle structure including the pillow beam.
Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

FIG. 1 is a side view of a railway vehicle. FIG. 2 is a perspective view of the railway vehicle structure as viewed from below. FIG. 3 is a plan view of the pillow beam. FIG. 4 is a plan view of a panel constituting the pillow beam shown in FIG. FIG. 5 is a plan view of a center pin mounting seat provided in the core shown in FIG. 6 is a cross-sectional view taken along the line AA of the pillow beam shown in FIG. 7 is a cross-sectional view taken along the line BB of the pillow beam shown in FIG. 8 is a CC cross-sectional view of the pillow beam shown in FIG. 9 is a DD cross-sectional view of the pillow beam shown in FIG. FIG. 10 is an enlarged view of the F part of the BB cross section of the pillow beam shown in FIG. FIG. 11 is an EE cross-sectional view (see FIG. 3) of the pillow beam constituting the underframe.

A rail vehicle is a general term for vehicles operated along a laid track, and means a rail vehicle, a monorail vehicle, a new transportation system vehicle, a tram, and the like.
In addition, the embodiment disclosed herein is a pillow beam composed of a metal core material and a composite material provided on both upper and lower surfaces of the core material, and this pillow beam is attached to the side beam and the middle beam constituting the underframe. The present invention relates to a structure provided by mechanical fastening means such as rivets or bolts.
In the following, an embodiment of the present invention will be described with reference to the drawings, taking a railway vehicle as an example of a rail vehicle.

In addition, each direction related to the railway vehicle provided for the following description intersects the longitudinal direction (rail direction) 100 of the railway vehicle, the width direction (sleeper direction) 110 of the railway vehicle, the longitudinal direction 100, and the width direction 110. It is defined as the height direction 120 of the railway vehicle. Hereinafter, they are simply referred to as a longitudinal direction 100, a width direction 110, and a height direction 120.

Fig. 1 is a side view of a railway vehicle. The railway vehicle is composed of a railway vehicle structure (hereinafter referred to as structure 1), a carriage 5, and electrical and interior parts. The structure 1 is erected at a frame 10 (see FIG. 2) forming a floor, side structures 20 erected at both ends in the width direction of the framing 10, and both ends of the frame 10 in the longitudinal direction. And a roof structure 40 supported by the upper end of the side structure 20 and the upper end of the wife structure 30. The side structure 20 includes a window portion 22 for daylighting and ventilation, a side doorway 21 used for passengers and the like.

Both ends in the longitudinal direction 100 of the structure 1 are supported by a carriage 5 so as to be movable on the track. A plate-shaped pillow beam 14 is provided along the width direction of the underframe 10 at the lower surface of the underframe forming the floor of the structure 1 and provided with the carriage 5. The structure 1 is elastically supported by a pair of air springs 8 (only one shown) disposed in the central portion in the longitudinal direction 100 of the carriage frame 6 of the carriage 5 provided below the pillow beam 14. The air spring 8 suppresses the vibration of the carriage 5 caused by the track irregularity and the like from propagating to the structure 1, or the height of the floor surface of the structure 1 that is displaced in the height direction 120 according to the increase or decrease of the number of passengers. Responsible for maintaining a constant level.

FIG. 2 is a perspective view of the railway vehicle structure as viewed from below. The underframe 10 forming the floor surface of the structure 1 supports the weight of passengers and equipment provided under the floor, and has high rigidity because a compressive load and a tensile load are applied from vehicles connected to the front and rear. The underframe 10 includes side beams 11 extending from the side structure 20 at both ends in the width direction 110, and end beams 13 at both ends in the longitudinal direction 100. Further, two middle beams 12 are provided in such a manner as to extend along the longitudinal direction 100 of the frame 10 from the central portion of the end beam 13 in the width direction 110. The middle beam 12 includes a coupler (not shown) that couples the vehicles.

A plate that connects one side beam 11 to the other side beam 11 along the width direction 110 of the frame 10 at a position away from the end beam 13 toward the center of the longitudinal direction 100 of the frame 10 by a predetermined distance. A shaped pillow beam 14 is provided. The pillow beam 14 is connected to the side beam 11 by a mechanical fastening means such as a bolt at a fastening portion 82a (see FIG. 3) at both ends in the width direction 110, and a fastening portion closer to the center in the width direction 110. At 82b (see FIG. 3), the two middle beams 12 are fastened by mechanical fastening means such as bolts.

3 is a plan view of the pillow beam, and FIG. 4 is a plan view of the panel 51 constituting the pillow beam shown in FIG. The pillow beam 14 is a plate-like component, and has a symmetrical shape with respect to an imaginary line showing the EE cross section. Both ends of the pillow beam 14 in the width direction 110 are fastening portions 82 a at both ends fastened to the side beam 11. Further, a central fastening portion 82 b fastened to the middle beam 12 projects in a direction along the longitudinal direction 100 at the central portion in the width direction 110 of the pillow beam 14.

The pillow beam 14 in the present embodiment includes a metal core member 50 and a composite material provided along the core member 50. That is, at least a part of the surface of the metal core member 50 and the surface of the composite material exists substantially in parallel. The core member 50 includes a metal panel 51 and a metal center pin mounting seat 75 (see FIG. 5) connected to the center of the panel 51.
By taking such a structure, the pillow beam of a present Example can promote weight reduction compared with the conventional pillow beam comprised only with a metal component.

Further, preferably, the pillow beam 14 includes a metal core member 50 (see FIG. 6), a first composite member 33 provided with the core member 50 on the upper surface in the height direction 120, and a second member provided on the lower surface. The composite material 35 is used.
By taking such a configuration, the pillow beam of the present embodiment mainly bears the load even when a bending load acts on the pillow beam 14 because the composite material having excellent tensile strength and compressive strength bears the load. It is possible to promote weight reduction and to have high bending strength and rigidity.

Further, preferably, the pillow beam 14 is sealed by covering a substantially entire surface of the core material 50 with a first composite material 33 covering the upper surface of the core material 50 and a second composite material 35 covering the lower surface of the core material 50. (See FIG. 6). That is, the composite material is a cylindrical body that includes the core material 50 therein.

By adopting such a configuration, the pillow beam of the present embodiment can provide a rail vehicle that can have high strength and rigidity and durability (weather resistance) of metal parts and can reduce life cycle cost. it can.
Moreover, since the pillow beam 14 is a hybrid structure composed of the metal core material 50 and the first composite material 33 and the second composite material 35, even if the mechanical strength of the composite material is impaired due to deterioration over time or the like. Since the metallic core member 50 can ensure the residual strength, it can have high reliability.

Although not shown, instead of the first composite material 33 and the second composite material 35, the core member 50 is inserted from the opening of the tubular portion knitted into a tubular shape, and then the opening is closed. The pillow beam 14 may be configured by impregnating and curing a cylindrical body containing the core material 50 with resin.

FIG. 4 is a plan view of the panel 51 constituting the pillow beam 14. The panel 51 is made of, for example, an aluminum alloy, and is provided along a rectangular first member 53 having a long side arranged in the width direction 110 at the center and both edges of the first member 53 in the longitudinal direction 100. The second member 55, the third member 57 provided along the longitudinal direction 100 at both end edges in the width direction 110 of the first member 53 and the second member 55, and the second member 55 connected to the second member 55 and the third member 57. It consists of four members 58. Instead of the separately prepared second member 55 and third member 57, an integrated member obtained by integrating the second member 55 and the third member 57 may be prepared.

The opening 61 for providing the center pin attachment seat 75 (refer FIG. 5) is provided in the width direction center part of the 1st member 53 which comprises the panel 51. As shown in FIG. Further, in order to elastically support the structure 1, an opening 60 is provided at a portion where an air spring provided on the upper surface of the carriage 5 is in contact.

FIG. 5 is a plan view of the center pin mounting seat 75 provided in the core shown in FIG. The center pin mounting seat 75 is, for example, a rectangular plate-like member having a dimension in the longitudinal direction 100 that is manufactured by cutting an aluminum alloy and is larger than a dimension in the width direction 110. A flange 75b along the longitudinal direction and a flange 75c along the width direction 110 are provided on the periphery of the center pin mounting seat 75.

The center pin mounting seat 75 has an opening 75e at the center thereof, and a plurality of cylindrical portions 75d having an axis along the height direction 120 are cut out around the opening 75e. The center pin mounting seat 75 is fastened to the pillow beam 14 by a bolt inserted into the cylindrical portion 75d (see FIG. 9).

FIG. 6 is a cross-sectional view of the pillow beam at AA in FIG. Reference numeral 50 in FIG. 6 indicates the range of the core material 50. In this cross section, the core member 50 includes a panel 51 including a first member 53 and a second member 55, a center pin mounting seat 75 provided in the panel 51, and the like. 6 indicates a range of the center pin mounting seat 75. Moreover, 61 in FIG. 6 has shown the opening part.

Further, the core member 50 including the panel 51 and the center pin mounting seat 75 is sealed with a first composite material 33 and a second composite material 35 having a shell structure divided in the height direction 120.

FIG. 7 is a cross-sectional view of the pillow beam 14 taken along BB in FIG. The pillow beam 14 forms the core member 50 in this cross section, and the first and second

composite members

33 and 35 having a shell structure in which the first member 53 and the second member 55 are divided in the height direction 120. The whole surface is sealed.

That is, the pillow beam 14 sandwiched the metallic member (core material 50) disposed as a core between the composite materials (first composite material 33, second composite material 35) from both sides in the vertical direction (height direction 120). This shows a hybrid structure, in which two composite materials (33, 35) are spaced apart from each other in the height direction 120 with the core material 50 interposed therebetween.
The first composite material 33, the second composite material 35, and the first member 53 or the second member 55 that is a part of the core material 50 are formed with a cylindrical body 59 that penetrates in the height direction 120. Yes.

FIG. 8 is a cross-sectional view taken along the line CC of FIG. Also in this cross section, the pillow beam 14 is configured by sealing the entire core material 50 assembled from the first composite material 33 and the second composite material 35 having a shell structure divided in the height direction 120.

FIG. 9 is a cross-sectional view of the pillow beam at DD in FIG. In FIG. 9, reference numeral 75 denotes a range of the center pin mounting seat 75. The center pin mounting seat 75 has a flange 75 b fitted into the opening of the face plate 53 c below the first member 53. Except for the cylindrical portion 75d, the entire surface is sealed by the first composite material 33 and the second composite material 35 having a shell structure, as in the case of the other cross-sectional views.

FIG. 10 is an enlarged view of the F part of the BB cross section of the pillow beam shown in FIG. 10 has an insulating material 36 (glass fiber layer or GFRP) on the surface of a core material 50 (panel 51, center pin mounting seat 75, etc.), and the outside of this insulating layer is a composite material. The structure sealed with (the 1st composite material 33, the 2nd composite material 35) is shown.

This configuration can suppress deterioration due to electric corrosion of the core material 50 made of aluminum alloy, thereby providing a rail vehicle including the pillow beam 14 with high reliability.

Next, the first composite material 33 and the second composite material 35 that cover the core material 50 will be described. The first composite material 33 and the second composite material 35 are made of carbon fiber reinforced plastic (hereinafter referred to as CFRP) in which carbon fiber is selected as the reinforcing fiber and epoxy resin is selected as the matrix resin. The reinforcing fiber is not limited to carbon fiber, and glass fiber or aramid fiber may be selected as the reinforcing fiber. Similarly, the matrix resin is not limited to an epoxy resin, and an unsaturated polyester resin, vinyl ester resin, phenol resin, or the like may be selected as the matrix resin.

In addition, in order to make the elastic modulus of CFRP equal to that of the core material made of aluminum alloy, CFRP may have a quasi-isotropic laminated structure without giving anisotropy, and the strength according to the load condition (load direction) may be CFRP. It is good also as a laminated structure which gives anisotropy in order to give to.

Hereinafter, the manufacturing process of the pillow beam 14 will be described. First, the panel 51 which makes the core material 50 is manufactured. A first member 53, a second member 55, a third member 57, and a fourth member 58 constituting the panel 51 are prepared.

The first member 53 and the second member 55 are hollow extruded profiles having two face plates 53a (55a) and face plates 53c (55c) facing each other, and ribs 53b (55b) connecting these face plates. Are extruded. The panel 51 positions the four members of the first member 53, the second member 55, the third member 57, and the fourth member 58, and then welds (or friction stir welds) along the joining

lines

71, 72, 73. ).

Subsequently, a portion where a center pin mounting seat 75 described later is fitted is processed into the panel 51. The face plate 53c below the center of the first member 53 (panel 51) is removed according to the rectangular shape of the center pin mounting seat 75 (the rectangular shape in which the dimension in the longitudinal direction 100 is larger than the dimension in the width direction 110). Further, a plurality of holes 80 into which a plurality of cylindrical portions 75d provided in the center pin mounting seat 75 are fitted are processed in the upper face plate 53a opposite to the removed lower face plate (FIGS. 3, 4, and 9). reference).

Next, the center pin mounting seat 75 is manufactured by cutting an aluminum alloy. A rectangle having a dimension in the longitudinal direction 100 larger than a dimension in the width direction 110 is formed, and an opening 75e is processed at the center. A flange 75b extending along the longitudinal direction 100 and a flange 75c extending along the width direction 110 are disposed at the entire periphery of the center pin mounting seat 75, and a plurality of cylindrical portions 75d around which the center pin 15 is fastened are formed around the opening 75e. It is cut out in such a manner that the axial direction is directed to the direction 120.

Subsequently, the center pin mounting seat 75 is connected to the panel 51 to manufacture the core material 50. First, the center pin mounting seat 75 is fitted into the processed part of the panel 51 (first member 53). The flange 75b (75c) provided on the periphery of the center pin mounting seat 75 is fitted until it contacts the face plate 53a of the first member 53, and the plurality of cylindrical portions 75d of the center pin mounting seat 75 are connected to the panel 51 (first member). 53) are fitted into the plurality of holes 80 processed. At this time, after confirming that the flange 75c of the center pin mounting seat 75 overlaps the joining line 71 of the first member 53 and the second member 55, the first member 53 and the center pin mounting seat 75 are welded. By mounting in this way, the center pin mounting seat 75 can be firmly fixed to the panel 51.

Next, the first composite material 33 and the second composite material 35 that have been autoclave (pressurized and heated) through a prepreg process in which an epoxy resin is preliminarily blended with carbon fiber, and the core material 50 are subjected to a difference in linear expansion coefficient. Assemble with a room-temperature curable adhesive so that no residual stress occurs. At this time, electrolytic corrosion is performed by electrically insulating the surface of the composite material (first composite material 33, second composite material 35) in contact with the aluminum alloy core material 50 (panel 51, center pin mounting seat 75, etc.). A thin insulating material 36 (glass fiber layer or GFRP, see FIG. 10) is provided. Furthermore, in order to obtain a strong bonding surface, screws (small screws) or the like may be additionally provided at intervals of several hundred mm to ensure the surface pressure during bonding.

As an example of the composite material manufacturing method, a manufacturing method in which autoclave molding is performed after the prepreg process has been shown. Instead of this manufacturing method, press molding, RTM (Resin Transfer Molding) method, RIM (Reaction Injection) The members formed by the continuous molding method such as the molding method or the pultrusion method may be cut into appropriate dimensions, and then these members may be joined and assembled. Furthermore, an integral molding method (SCRIMP method) or the like in which a diffusion material of a matrix resin to be injected at the same time that the molding part is decompressed may be employed.

After the assembly is completed, the hole 81 into which the cylindrical body 59 (bush, see FIG. 7) is inserted is machined, and then the first composite material 33, the second composite material 35, and the core material 50 are penetrated in the height direction 120. At the same time, the cylindrical body 59 that restrains them in the vertical direction is fixed to complete the pillow beam 14.

7, the axial dimension t1 of the cylinder 59 is set to be slightly larger than the dimension between the upper surface of the first composite material 33 and the lower surface of the second composite material 35. The upper end portion of the cylindrical body 59 protrudes upward (in the direction of the frame 10) from the upper surface of the first composite material 33, and the lower end portion of the cylindrical body 59 is below the lower surface (surface on the track side) of the second composite material 35. It is fixed to the pillow beam 14 in such a manner as to protrude to the top.

Further, although not shown in the drawings, a concave portion that matches the shape of the contact surface of the cylinder 59 is processed in a portion where the cylinder 59 (pillow beam 14) of the side beam 11 and the middle beam 12 contacts, The pillow beam 14 may be mechanically fastened to the side beam 11 and the middle beam 12 in a state where the contact portion of the cylindrical body 59 is fitted in the recess provided in the middle beam 12.
In addition, a recessed part may be provided in the side beam 11 and the middle beam 12 which all the cylinders 59 contact | abut, and a recessed part may be provided only in the site | part to which the selected cylinder 59 contacts.

When the side beam 11 and the middle beam 12 are provided with recesses in accordance with the shape of the cylindrical body 59 that protrudes from the upper surface of the first composite material 33 and the surface of the second composite material 35, the cart 5 Even if a traction force or a braking force acts on the pillow beam 14, the fastening can be maintained without the pillow beam 14 slipping with respect to the side beam 11 and the middle beam 12. Furthermore, by providing the recesses, the number (number) of the mechanical fastening portions and the cylinders 59 can be reduced, the manufacturing cost can be reduced, and the weight reduction can be promoted.

The pillow beam 14 is mechanically fastened to the side beam 11 and the middle beam 12 constituting the frame 10 by bolts inserted into the cylindrical body 59. Furthermore, the center pin 15 is mechanically fastened to the pillow beam 14 by a bolt inserted into the cylindrical portion 75d. The cylindrical body 59 is a component provided so as not to buckle due to a seating surface pressure due to a bolt tightening force, and may not necessarily be an aluminum alloy but may be iron or the like having a high buckling strength.

In addition, if the cylindrical body 59 is made of a conductive material, a highly reliable rail vehicle capable of suppressing breakage and resetting of electrical equipment when a current due to a large voltage (hereinafter, surge current) occurs is provided. can do.

For example, when the current collector (pantograph) contacts or is disconnected from the overhead line, or when the vacuum circuit breaker (VCB) provided in the circuit connecting the current collector and the main transformer is turned on and off In addition, a very large voltage is instantaneously generated, and a surge current may be generated due to the large voltage.
This surge current may cause damage to electrical equipment such as a main converter, auxiliary power supply, and air conditioner mounted on the rail vehicle, or cause resetting of these electrical equipment. For this reason, in order to protect an electrical apparatus from a surge current, the structure 1 and the trolley | bogie 5 are electrically connected, and the wheel shaft 7 with which the trolley | bogie 5 is equipped (thing equipped with the wheel at the both ends of an axle shaft) is used. A grounding circuit for grounding the track (track) is provided.

That is, by providing a conductive or well-conductive member that penetrates the upper and lower surfaces in the height direction 120 of the pillow beam covered with the composite material, the structure 1 (the middle beam 12 and the side beams 11 forming the underframe 10). ) Through the pillow beam 14 to the carriage 5 (see FIG. 11). For this reason, even if the pillow beam 14 is covered with a composite material having low conductivity compared to metal or the like, it is possible to provide a highly reliable rail vehicle capable of suppressing breakage and resetting of electrical equipment due to surge current. .

FIG. 11 is an EE cross-sectional view (see FIG. 3) of the pillow beam constituting the underframe. The pillow beam 14 is connected to the side beam 11 and the middle beam 12 constituting the frame of the structure 1 by mechanical fastening means such as bolts. The cylinders 59 (bush) provided in the pillow beam 14 provided for these fastenings are provided in two or one row along the longitudinal direction 100 of the structure 1.

A central pin 15 serving as a turning center of the carriage 5 is provided at the center in the width direction 110 of the lower surface of the pillow beam 14 (the surface on which the carriage 5 is provided). The center pin 15 and the cart are connected by a traction device, and a traction force and a braking force are transmitted from the trolley 5 to the structure 1 via the traction device. In addition, a pair of air springs 8 is provided in such a manner that the central pin 15 is sandwiched along the width direction 110 at the center of the longitudinal direction 100 of the pillow beam 14.

A sufficient space exists between the lower surface of the underframe 10 and the upper surface of the pillow beam 14, and a pipe (wiring) module 9 in which a plurality of wires and pipes are bundled is provided on the underside of the underframe 10. It is laid along the longitudinal direction 100 from the end portion toward the center portion without interfering with the pillow beam 14. An air tank may be provided in the above space.

As described above, by adopting the configuration of the present embodiment, the pillow beam 14 of the present embodiment is not composed of only metal parts, and thus the weight reduction of the pillow beam 14 can be promoted. Furthermore, the pillow beam 14 includes the first composite material 33 and the second composite material 35 on both sides in the vertical direction (height direction) of the plate-shaped metal core 50, so that a bending load acts on the pillow beam 14. Even in this case, since the composite material having excellent tensile strength and compressive strength mainly bears the load, it is possible to promote weight reduction and to have high bending strength and rigidity.

Furthermore, the pillow beam 14 of the present embodiment is high due to the configuration in which the plate-shaped metal core member 50 is sealed with the first composite material 33 and the second composite material 35 from both sides in the vertical direction (height direction). It is possible to provide a rail vehicle that can be provided with strength, rigidity, durability of metal parts (weather resistance), and can reduce life cycle cost.

Furthermore, since the pillow beam 14 of the present embodiment is a hybrid structure composed of the metal core 50, the first composite material 33, and the second composite material 35, the mechanical strength of the composite material is impaired due to deterioration over time or the like. Even so, since the metallic core material 50 can ensure the remaining strength, high reliability can be provided.

Further, the side beam 11 and the middle beam 12 are provided with a recess, and the pillow beam 14 and the side beam 11 and the middle beam 12 are mechanically fastened with the cylindrical body 59 forming the pillow beam 14 fitted in the recess. Even if a traction force or a braking force acts on the pillow beam 14 from the cart 5, the fastening can be maintained without the pillow beam 14 slipping with respect to the side beam 11 and the middle beam 12. Further, the provision of the recesses can reduce the number (number) of the mechanical fastening portions and the cylinders 59, thereby reducing the manufacturing cost and promoting the weight.

Furthermore, the pillow beam 14 of the present embodiment has a high attenuation rate because a metallic core material and a composite material are assembled with an adhesive. For this reason, when vibration is input from the carriage 5 to the pillow beam 14 via the traction device and the center pin 15, the vibration is attenuated in the process of transmitting the vibration through the pillow beam 14. It is hard to be transmitted. Therefore, since the vehicle interior noise and vibration due to the vibration of the structure 1 from the carriage 5 can be reduced, a comfortable rail vehicle can be provided.

Further, as a modified example of the present embodiment, the pillow beam 14 is provided with an accelerometer 90 on the upper surface of the pillow beam 14 constituting the frame 10 (the surface facing the lower surface of the frame 10). A state monitoring system for monitoring the vibration level may be installed. When the deterioration of the first (2) composite material 33 (35) constituting the pillow beam 14 progresses or the bonding surface between the core material 50 constituting the pillow beam 14 and the composite material is peeled off, the accelerometer 90 The vibration level and natural frequency of the pillow beam 14 to be monitored change. By monitoring the change in the vibration level and the like, the soundness of the pillow beam 14 can be constantly monitored, so that a highly reliable rail vehicle can be provided.

Furthermore, the pillow beam 14 includes a glass fiber layer (see FIG. 10) serving as an insulating material 36 on the boundary surface between the aluminum alloy core material 50 and the composite material (first composite material 33, second composite material 35). . With this configuration, deterioration due to electric corrosion of the core material 50 made of aluminum alloy can be suppressed, so that a rail vehicle including the pillow beam 14 with high reliability can be provided.

Further, since the pillow beam 14 includes a conductive cylinder 59, the carriage 5 passes through the cylinder 59 from the structure 1 (the middle beam 12 and the side beam 11 forming the underframe 10) through the pillow beam 14. A ground circuit (see FIG. 11) leading to can be easily configured. For this reason, it is possible to provide a highly reliable rail vehicle that can suppress breakage and resetting of electrical equipment due to surge current.

With the above configuration, it is possible to provide a lightweight pillow beam that is highly reliable and capable of reducing life cycle energy, and a rail vehicle structure including the pillow beam.

In addition, this invention is not limited to the above-mentioned Example, Various modifications are included. For example, the above-described embodiments have been described in detail in order to easily explain the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of the embodiment can be replaced with another configuration, and another configuration can be added to the configuration of the embodiment. Further, it is possible to add / delete / replace the configuration of a part of the configuration of the embodiment.

DESCRIPTION OF SYMBOLS 1 ... Structure 5 ... Carriage 6 ... Carriage frame 7 ... Wheel shaft 8 ... Air spring 9 ... Piping (wiring) module 10 ... Frame 11 ... Side beam 12 ... Middle beam 13 ... End beam 14 ... Pillow beam 15 ... Center pin 20 ... Side structure 21 ... Side doorway 22 ... Window part 50 ... Core material 30 ... Wife structure 40 ... Roof structure 33 ... First composite material 35 ... Second composite material 36 ... Insulating material 51 ... Panel 53 ... First member 55 ... Second Member 57 ... Third member 58 ... Fourth member 59 ...

Cylindrical body

60, 61 ...

Openings

71, 72, 73 ... Joining line 75 ... Center

pin mounting seats

75b, 75c ... Flange 75d ... Cylindrical portion 75e ... Opening 80, 81 ... holes 82a, 82b ... fastening portion 90 ... accelerometer 100 ... longitudinal direction 110 ... width direction 120 ... height direction

Claims

In the pillow beam constituting the underframe of the rail vehicle structure,
The pillow beam is
A metal core,
A composite provided along the core;
Pillow beam characterized by comprising.
In the pillow beam according to claim 1,
The composite material is
A pillow beam comprising a cylindrical body having the core material therein.
In the pillow beam according to claim 1,
The composite material is
A first composite material provided on an upper surface of the core material;
A second composite material provided on the lower surface of the core material;
Pillow beam characterized by comprising.
The pillow beam according to claim 3,
A pillow beam comprising a conductive member that penetrates the first composite material, the core material, and the second composite material in a height direction of the rail vehicle structure.
In the pillow beam according to claim 4,
The core material is
A metal panel,
A pillow beam comprising a center pin mounting seat provided at the center of the panel.
In the pillow beam according to claim 5,
The panel is
A pillow beam, which is an extruded shape member made of an aluminum alloy having two face plates facing each other and ribs connecting the face plates.
In the pillow beam according to claim 5,
The panel is
A first member disposed along the width direction at the center of the longitudinal direction of the pillow beam;
A pillow beam comprising a second member joined to the first member along both longitudinal ends of the first member.
In the pillow beam according to claim 5,
The center pin mounting seat is
It is a rectangular plate-shaped member whose longitudinal dimension is larger than the width dimension,
A flange that is welded in contact with one face plate at the periphery of the plate-like member;
A pillow beam comprising: a plurality of cylindrical portions into which bolts for fixing the center pin to the center pin mounting seat are inserted.
The pillow beam according to claim 8,
The center pin mounting seat is
A pillow beam, wherein the flange is welded to the panel in such a manner that the flange is superimposed on a joint line.
In the pillow beam according to claim 4,
The pillow beam is
A pillow beam comprising an insulating material at a boundary surface between the core material, the first composite material, and the second composite material.
In the pillow beam according to claim 4,
The conductive member is a cylinder, and an upper end portion of the conductive member protrudes from an upper surface of the first composite material;
Pillow beam characterized by.
A rail vehicle structure comprising the pillow beam according to any one of claims 1 to 11.