Source: https://patents.google.com/patent/US20070283843A1/en
Timestamp: 2020-01-25 20:31:54
Document Index: 403048949

Matched Legal Cases: ['art 60', 'art 60', 'art 60', 'arts 60', 'art 60', 'art 60']

US20070283843A1 - Transportation machine with energy absorbing structure - Google Patents
Transportation machine with energy absorbing structure Download PDF
US20070283843A1
US20070283843A1 US11/638,495 US63849506A US2007283843A1 US 20070283843 A1 US20070283843 A1 US 20070283843A1 US 63849506 A US63849506 A US 63849506A US 2007283843 A1 US2007283843 A1 US 2007283843A1
object barrier
US11/638,495
2006-05-10 Priority to JP2006-131260 priority Critical
2006-05-10 Priority to JP2006131260A priority patent/JP4712604B2/en
2006-12-14 Assigned to HITACHI, LTD. reassignment HITACHI, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: YAMAMOTO, TAKAHISA, YAMAGUCHI, TAKASHI, KAWASAKI, TAKESHI, MOCHIDA, TOSHIHIKO
2007-12-13 Publication of US20070283843A1 publication Critical patent/US20070283843A1/en
238000004642 transportation engineering Methods 0 abstract claims description title 23
230000004083 survival Effects 0 abstract description 26
For a transportation machine such as a railway vehicle, a space for a driver is secured while collision energy is absorbed at a time of collision with a large obstacle, and entry of a flying object into a driving cab is prevented by a rigid structure at a time of collision with the flying object. Windows 40, 40 are provided in a flying object barrier plate 50 provided at a tip end portion of a driving cab 25, and energy absorbing members 100, 100 are penetrated through the windows 40, 40 to be disposed in a form extending outward of the flying object barrier plate 50 from an inside of the driving cab 25. The energy absorbing members 100, 100 of a large absorbing capacity can be efficiently disposed by utilizing a space of the driving cab 25 provided in a vehicle body. A beam member of a crushable zone 11 a including the flying object barrier plate 50 is firmly placed and can be connected to a survival zone 10.
In a crushable zone 11 a, a flying object barrier plate 50 in a planar shape with its in-plane orientation being in the direction orthogonal to the traveling direction is disposed at the end portion in the traveling direction, of the driving cab 25. In the crushable zone 11 a, two energy absorbing members 100 and 100 are disposed to penetrate through the flying object barrier plate 50 and to be spaced in a vehicle width direction.
In FIG. 2, the main members which construct the crushable zone 11 are the flying object barrier plate 50, a beam member 60 and the energy absorbing members 100 and 100. Each of the energy absorbing members 100 is firmly connected to the survival zone 10, and is disposed to extend outward of the vehicle body along a rail direction (vehicle body longitudinal direction). The energy absorbing members 100 and 100 are at both end sides in the vehicle body width direction. The flying object barrier plate 50 is firmly connected to a vertical pillar 20 at an end portion of the survival zone 10 by the beam member 60. The beam member 60 includes a horizontal beam part 60 a at a floor side and a horizontal beam part 60 b parallel with the horizontal beam part 60 a and disposed at an intermediate height, root sides of the horizontal beam parts 60 a and 60 b are firmly connected at the opening 25 of the survival zone 10, and tip end portions are connected to the flying object barrier plate 50. Connecting portions of the horizontal beam part 60 b and the flying object barrier plate 50 and an upper end of the opening 25 of the survival zone 10 are connected by an inclined beam part 60 c of the beam member 60.
The energy absorbing member 100 is constructed by disposing two body structures 100 a and 100 b differing in outer shape by connecting them in the vehicle body longitudinal direction. Namely, the outer shape of the energy absorbing member 100 a disposed at the foremost end portion is small as compared with the energy absorbing member 100 b which is placed adjacently to it at the body structure side. The energy absorbing member 100 b is connected to the survival zone 10 via a connecting member 80.
FIG. 3 shows the view of the crushable zone 11 a in which the driving cab is disposed seen from the end portion in the vehicle longitudinal direction. The energy absorbing members 100 and 100 penetrate through the flying object barrier plate 50 to project, seal members 30 are coated therebetween to inhibit entry of water from gaps. The seal member 30 has such strength as not to restrain the action when the energy absorbing member 100 deforms and absorbs energy at the time of collision.
In such a construction, the relative relationship of the energy absorbing member and the flying object barrier plate when the crushable zone to which the present invention is applied is collided will be shown in FIG. 5. A state 1 in (a) shows the state before collision. A state 2 in (b) shows the state immediately after the collision begins. It is the energy absorbing member 100 a existing at the head that starts contact at first as the vehicle body structure. The seal member 30 exists between the energy absorbing member 100 a at the tip end side and the flying object barrier plate 50. At this time, the sectional area of the energy absorbing member 100 a at the tip end side is small as compared with the sectional area of the energy absorbing member 100 b at the root side, and therefore, the energy absorbing member 100 a at the tip end side starts local deformation. A state 3 in (c) shows the state in which the collision further proceeds from the state 2. When the collision further proceeds from the state 2, and the energy absorbing member 100 a proceeds with deformation, the seal member 30 which connects the flying object barrier plate 50 and the energy absorbing member 100 a breaks. Thereby, the direct load caused by collision does not act on the flying object barrier plate 50 at all, and the load caused by the collision acts on only the energy absorbing member 100. Therefore, deformation of the energy absorbing member 100 a proceeds, and the energy absorbing member 100 a deforms until there is no room for deformation. Thereafter, the energy absorbing member 100 b starts deformation. A state 4 in (d) shows the state in which deformation advances until there is no room for deformation any more. At this time, a crashed remnant amount L3 of the energy absorbing member 100 is long as compared with L2, and therefore, even after deformation of the energy absorbing member 100 is finished, the tip end of the energy absorbing member 100 projects from the flying object barrier plate 50, and the flying object barrier plate 50 can avoid being deformed by the obstacle which collides with the energy absorbing member 100.
Deformation occurs to only the energy absorbing member 100 so that both of the energy absorbing member 10 a projecting from the flying object barrier plate 50 and the energy absorbing member 100 b disposed in the space of the driving cab 25 deform as above, and therefore, the space of the driving cab 25 where a crew is on board is left uncrushed. Since the energy absorbing member 100 and the flying object barrier plate 50 are connected by the seal member 30, vibration during vehicle operation is reduced and at the same time, entire buckling can be prevented, in terms of the energy absorbing member 100. Therefore, the energy absorbing member 100 buckles to be small in the bellow shape, and can absorb a large load.
There exists a cover, which covers the end body structure 3, and the energy absorbing member 100, at the front side of the end body structure 3. This cover is an apparent cover. The cover which is constructed by the flying object barrier plate 50, the members 60 a, 60 b and 60 c can be the to be a reinforcement cover.
A second embodiment in the case where the present invention is applied to a railway vehicle body structure will be described with reference to FIG. 6. The structures of the flying object barrier plate 50 and the beam member 60 are the same as the case of the first embodiment. In this case, an energy absorbing member 200 which differs from that in the first embodiment will be described. The energy absorbing member 200 projecting from the flying object barrier plate 50 is constructed as two upper and lower units. In the portions constructed into the two upper and lower units, energy absorbing member portions 200 c and 200 d are disposed on an upper unit side, and energy absorbing member portions 200 e and 200 f are disposed at the lower unit side. The energy absorbing member portions 200 c and 200 d are connected side by side in the vehicle body longitudinal direction. The energy absorbing member portions 200 e and 200 f are also connected side by side in the vehicle body longitudinal direction. The energy absorbing member portions 200 d and 200 f are both connected to an energy absorbing member 200 g. The energy absorbing member 200 g is connected to an energy absorbing member 200 h, and the energy absorbing member 200 h is firmly connected to the survival zone 10 via a connecting member 80. Here, with an end portion of the survival zone 10, which is the nearest to the crushable structure, as the reference, a distance to the tip end of the flying object barrier plate 50 is L10, a distance to the tip end of the energy absorbing member portion 200 e from the survival zone 10 is L11, and a distance to the tip end of the energy absorbing member portion 200 c is L12. Here, L10<L11<L12 is satisfied.
Further, the distance from the endportion of the survival zone 10, which is the nearest to the crushable structure, when the energy absorbing member finishes deformation is L120 for the energy absorbing member portion 200 c, and is L110 for the energy absorbing member 200 d (L110, L120 not shown). In this case, L10<L110<L120 is satisfied.
In such a construction, when colliding with an obstacle, the energy absorbing member portion 200 c on the upper unit side, which is at the longest distance from the end portion of the survival zone 10 which is the nearest to the crushable structure, starts deformation first. When the deformation further proceeds, the energy absorbing member portion 200 e on the lower unit side starts deformation. Since such a deformation mode is established, the same effect as described in the first embodiment can be obtained and at the same time, the peak load occurring when collapse starts can be reduced. Namely, since the timings in which the energy absorbing member portion 200 c on the upper unit side and the energy absorbing member portion 200 e on the lower unit side start deformation differ, and thereby, the timings in which the peak loads occur differ, the peak load as a total is reduced.
A third embodiment in the case where the present invention is applied to a railway vehicle body structure will be described in accordance with FIG. 7. The structures of the flying object barrier plate 50 and the beam member 60 are the same as those in the second embodiment. In this case, in order to distinguish this embodiment from each of the previous embodiments, reference numbers and characters of the 300-level are used with respect to the energy absorbing member, but as compared with the second embodiment, no difference exists except for the difference in the disposition height of the energy absorbing members, and therefore, the explanation of the other respects will be omitted. About the disposition height of the energy absorbing member 300, the energy absorbing member portions 300 c and 300 d disposed on the upper unit side are disposed at the position higher than the floor surface height, and the energy absorbing member portions 300 e and 300 f disposed on the lower unit side are disposed at the position lower than the floor surface.
In such a construction, when colliding with an obstacle, the loads of the energy absorbing members 300 c and 300 e are transmitted to the underframe 5. Since the average height of the energy absorbing members 300 c and 300 e are coincide with the center in the vertical direction of the underframe 5, they do not bend the underframe 5.
A fourth embodiment in the case where the present invention is applied to the railway vehicle body structure will be described with reference to FIG. 8. The structures of the flying object barrier plate 50 and the beam member 60 are the same as those in the first embodiment. In this case, a beam member 460 which differs from that in the first embodiment will be described. In the beam member 460 which connects the flying object barrier plate 50 and the survival zone, beam members 460 a, 460 b and 460 c exist. The connecting position in the height direction of these beam members 460 and the survival zone 10 does not exist at the intermediate height at which an entrance/exit that is an opening 400 provided at an area of the survival zone 10, which is the nearest to the crushable zone 11 a.
2. The transportation machine with an energy absorbing structure according to claim 1, wherein
the energy absorbing material is connected to the flying object barrier plate by a connecting seal member provided at the window.
3. The transportation machine with an energy absorbing structure according to claim 1, wherein
a tip end position which the energy absorbing material occupies at a time of maximum collapse is set at a position outward of the flying object barrier plate.
4. The transportation machine with an energy absorbing structure according to claim 1, wherein
at least a portion of the energy absorbing material, which projects from the flying object barrier plate, is divided into two energy absorbing member portions of upper and lower units, and that
one of tip end sides of both of them projects more than the other.
5. The transportation machine with an energy absorbing structure according to claim 1, wherein
at least a portion of the energy absorbing member, which projects from the flying object barrier plate, is divided into two energy absorbing member portions of upper and lower units, and
the energy absorbing member portions of the two upper and lower units are disposed up and down with a center position in the vertical direction of an underframe of the vehicle body as a center.
6. The transportation machine with an energy absorbing structure according to claim 1, wherein
a cover for covering the transportation machine is provided at a front side of the flying object barrier plate.
US11/638,495 2006-05-10 2006-12-14 Transportation machine with energy absorbing structure Abandoned US20070283843A1 (en)
JP2006-131260 2006-05-10
JP2006131260A JP4712604B2 (en) 2006-05-10 2006-05-10 Transport equipment
US20070283843A1 true US20070283843A1 (en) 2007-12-13
ID=38212241
US11/638,495 Abandoned US20070283843A1 (en) 2006-05-10 2006-12-14 Transportation machine with energy absorbing structure
US (1) US20070283843A1 (en)
EP (1) EP1854694B1 (en)
JP (1) JP4712604B2 (en)
KR (1) KR100836089B1 (en)
CN (1) CN100457520C (en)
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2006-12-13 EP EP20060256332 patent/EP1854694B1/en active Active
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Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KAWASAKI, TAKESHI;YAMAGUCHI, TAKASHI;MOCHIDA, TOSHIHIKO;AND OTHERS;REEL/FRAME:018691/0190;SIGNING DATES FROM 20061013 TO 20061023