CN105015571B - Chassis of low-floor trailer body - Google Patents

Chassis of low-floor trailer body Download PDF

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Publication number
CN105015571B
CN105015571B CN201510517413.1A CN201510517413A CN105015571B CN 105015571 B CN105015571 B CN 105015571B CN 201510517413 A CN201510517413 A CN 201510517413A CN 105015571 B CN105015571 B CN 105015571B
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China
Prior art keywords
longeron
sleeper beam
cover plate
plate
upper cover
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CN201510517413.1A
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CN105015571A (en
Inventor
杨建帆
杨俊杰
郭水根
姚锡斌
黄国庆
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Guangzhou Electrical Locomotive Co Ltd
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Guangzhou Electrical Locomotive Co Ltd
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Publication of CN105015571A publication Critical patent/CN105015571A/en
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Abstract

The invention discloses a chassis of a low-floor trailer body. The chassis comprises a bolster, longitudinal beams, side beams and seat support beams, wherein the bolster transversely penetrates through the whole trailer body; the bolster comprises a bolster lower cover plate, a bolster upper cover plate, a bolster side plate, a bolster vertical plate and a bolster support plate; the longitudinal beams are connected to two sides of the middle of the bolster respectively; each longitudinal beam comprises an end beam and a longitudinal beam body and further comprises a longitudinal beam lower cover plate, a longitudinal beam upper cover plate, an end plate, an end cover and a longitudinal beam side plate; the longitudinal beam lower cover plate extends horizontally at the end beam, then obliquely and upwards extends and finally horizontally extends; the longitudinal beam upper cover plate extends horizontally at the end beam, then obliquely and upwards extends and finally horizontally extends; a horizontal plane is taken as a standard, the angle between the obliquely and upwards extending longitudinal beam upper cover plate and the horizontal plane is smaller than the angle between the obliquely and upwards extending longitudinal beam lower cover plate and the horizontal plane, and the cross sections of the obliquely and upwards extending sections of the longitudinal beam upper cover plate and the longitudinal beam lower cover plate are gradually reduced. The chassis structure is light in weight, good in strength and stiffness and most importantly good in force transmission performance.

Description

A kind of low-floor trailer bodies underframe
Technical field
The present invention relates to low-floor trailer bodies, especially low-floor trailer bodies underframe.
Background technology
Trailer bodies underframe is one of pith of trailer, for the trailer bodies underframe on non-powered bogie, its The weight of car body is assume responsibility for, and needs that tractive force is delivered on non-powered bogie, it is therefore desirable to trailer bodies underframe tool There are certain strength and stiffness, and need preferable transmission force property.
It is the patent for being 2014.6.27 publication date the CN104015745A applyings date for 2014.9.3 in China Patent Publication No. A kind of 100% modern city tramcar vehicle body bottom frame is disclosed in document, and is specifically disclosed, including sleeper beam, longeron, first End carriage, the second end carriage, first side beam, second side beam, the sleeper beam is welded into closing " bow " word box, the longitudinal beam welding Into the box-structure of closing, the whole car body of insertion.The sleeper beam, longeron, end carriage, side girders are welded together to form " well " font Frame structure.Underframe is all welded using high strength carbon Steel material, and each part is individually welded into underframe after welding, underframe with Car body miscellaneous part passes through riveting.The vehicle body bottom frame of this structure, although have the advantages that it is more, but,(1)For pillow For beam, the vertical stress at two ends is less, if all not only bringing trouble to manufacture using the sleeper beam of box-structure, and And the weight of whole vehicle body bottom frame is increased, so as to increase driving power, increase the consumption of energy;(2)Because longeron is Through whole car body, and the longitudinal length of vehicle body bottom frame is far longer than lateral length, therefore, whole longeron is in bearing body or hangs Flexural deformation is susceptible to during dress;(3)The transmission force property of the vehicle body bottom frame of said structure is bad.
The content of the invention
To solve above-mentioned technical problem, the invention provides a kind of low-floor trailer bodies underframe.
Solving the technical scheme of above-mentioned technical problem is:A kind of low-floor trailer bodies underframe, including sleeper beam, longeron, side Beam and Seat support beam;
The whole car body of sleeper beam lateral direction penetrating;Sleeper beam includes sleeper beam lower cover, sleeper beam upper cover plate, sleeper beam side plate, sleeper beam riser With sleeper beam support plate;Sleeper beam upper cover plate is located at the top of sleeper beam lower cover, is folded upward at forming institute at the two ends of sleeper beam lower cover The sleeper beam riser stated, sleeper beam riser is connected with sleeper beam upper cover plate, and in the upper end of each sleeper beam riser outside sleeper beam is connected with Support plate, in the both sides of sleeper beam lower cover and sleeper beam upper cover plate described sleeper beam side plate is connected to, and sleeper beam side plate is extended to The outer end of sleeper beam support plate and it is connected with sleeper beam riser and sleeper beam support plate, in the position of sleeper beam support plate, sleeper beam side plate is higher than Sleeper beam support plate;Sleeper beam gusset is provided between sleeper beam lower cover and sleeper beam upper cover plate;
Longeron is connected in the middle part both sides of sleeper beam;Described longeron includes end carriage and longeron body, end carriage and vertical Beam body is structure as a whole, and longeron is in T fonts;Described longeron include longeron lower cover, longeron upper cover plate, end plate, end cap and Longeron side plate;Longeron lower cover be in T fonts, from end to sleeper beam direction, longeron lower cover at end carriage it is horizontal-extending retread to It is upper to extend and then horizontal-extending;Longeron upper cover plate is in T fonts, from end to sleeper beam direction, longeron upper cover plate level at end carriage Extension is retreaded and is upwardly extended and then horizontal-extending;On the basis of horizontal plane, the angle that longeron upper cover plate extends obliquely is less than vertical The angle that beam lower cover extends obliquely so that longeron upper cover plate and longeron lower cover extension obliquely cross section gradually Reduce;End plate connection longeron upper cover plate and longeron lower cover away from sleeper beam side;End cap is connected to the longeron positioned at end carriage The two ends of upper cover plate and longeron lower cover;Longeron side plate is connected in the both sides of the inner side of end carriage and longeron body;Vertical Longeron gusset is connected between beam upper cover plate and longeron lower cover;
In the side bar that is respectively provided on two sides with of vehicle body bottom frame, side bar is connected with sleeper beam, longeron and Seat support beam;
Seat support beam is connected with sleeper beam, longeron and side bar.
Said structure, is the box-structure being made up of sleeper beam upper cover plate, sleeper beam lower cover and sleeper beam side plate in the middle part of sleeper beam, For carrying larger horizontal, longitudinal direction and distortion power so that stress evenly, is less prone to stress concentration, and structure is more stable, no Easily there is local fatigue destruction, and for the vehicle body bottom frame of the present invention, the vertical force that both sides are subject to is less, therefore, only Platy structure is designed to, so, the requirement for using can not only be reached, and the weight of whole vehicle body bottom frame can be mitigated, to manufacture Bring conveniently, reduce manufacturing cost, reduce tractive force, reduce the consumption of energy.For longeron, it is arranged to Two longerons, longeron is less likely to occur flexural deformation in bearing body or lifting, and structure is more stable.For longeron body For end carriage, using integral structure, then longeron lower cover and longeron upper cover plate are structure as a whole, so, whole car body bottom The good rigidity of frame, the transmission of power is more smoothly;In addition, horizontal-extending after extending obliquely, its section gradually reduces, when Continuous longeron lower cover and continuous longeron upper cover plate are employed, the phenomenon for stress concentration occur in bending place is avoided that.
Further, first hollow out of more than two is provided with sleeper beam lower cover, two is provided with sleeper beam upper cover plate The second hollow out above;The 3rd hollow out of more than two is provided with sleeper beam support plate, the structure can mitigate the weight of sleeper beam, and And do not interfere with the strength and stiffness of sleeper beam.
Further, sleeper beam side plate forms transition arc and lower transition arc, the knot corresponding to the position of sleeper beam riser Structure can reduce the phenomenon of stress concentration, improve the strength and stiffness of sleeper beam.
Further, gusset is welded between sleeper beam riser and sleeper beam support plate, the structure is reducing sleeper beam weight On the basis of further increase the strength and stiffness of sleeper beam.
Further, the 4th hollow out of more than two is provided with longeron lower cover, two is provided with longeron upper cover plate The 5th hollow out above, the structure compared with the weight of stringer, and can not interfere with the strength and stiffness of longeron.
Further, longeron lower cover is away from being outwardly formed the first protuberance, longeron upper cover plate in the middle part of the side of sleeper beam Away from the second protuberance is outwardly formed in the middle part of the side of sleeper beam, it is connected between the first protuberance and the second protuberance and is hinged Plate, the first protuberance, the second protuberance and articulated slab form hinged seat.The structure, hinged seat forms integrative-structure, energy with longeron The intensity of hinged seat is improved, in addition, after power is delivered on hinged seat, because it is structure as a whole, therefore, the power of Jing hinged seats Can smoothly be delivered on longeron, be not in the phenomenon for being interrupted power transmission so that the transfer performance of power is good.
Further, hole for hoist is provided with end cap, to facilitate lifting, and the sleeper beam as a result of the present invention and vertical Girder construction, especially designs into a single integrated structure by longeron body and end carriage, in lifting, is less likely to occur in the middle part of vehicle body bottom frame Deformation.
Further, described side bar includes side bar body and is connected to the buttress brace at side bar body two ends, and described adds Brutal includes the first vertical beam, the second vertical beam, the first longeron, the second longeron, first crossbeam and the first diagonal brace;First vertical beam Lower end be connected with end carriage, the upper end of the first vertical beam is connected with side bar body;The lower end of the second vertical beam connects with the first longeron Connect, the upper end of the second vertical beam is connected with side bar body;One end of first longeron is connected with end carriage, the other end of the first longeron with First crossbeam connects;One end of second longeron is connected with end carriage, and the other end of the second longeron is connected with first crossbeam;First crossbeam One end be connected with longeron body;First diagonal brace is connected between the first vertical beam and the second vertical beam.The side bar of the structure is strong Spend, it is not easy to deform.
Further, Seat support beam constitutes frame by many 3rd vertical beams, many 3rd longerons and Duo Gen second cross beams Frame structure, wherein, it is platy structure near the 3rd vertical beam of sleeper beam, near the lower end of the 3rd vertical beam of sleeper beam and longeron sheet Body connects, and with transition circle arc portion.In the present invention because a part for longeron body tilts upward extension, when end carriage stress Afterwards, horizontal component and moment of flexure can be formed in horizontal-extending section of the longeron near sleeper beam, therefore, the longeron near sleeper beam is horizontal-extending Section is susceptible to deformation, and because the lower end of the 3rd vertical beam near sleeper beam is connected with longeron body, therefore, hang down the 3rd The part that straight beam is connected with longeron body deforms, and easily causes the phenomenon of stress concentration, after transition circle arc portion is provided with, Above-mentioned technical problem can then be solved.
Further, the central bottom in sleeper beam is welded with middle base;Wherein a longeron and positioned near sleeper beam water Traction connecting seat is welded with flat extension;Laterally subtract in another longeron and positioned at being welded with horizontal-extending section of sleeper beam Shake connecting seat.Different for middle base, traction connecting seat and horizontal shock-absorbing connecting seat, the stress of this three, middle base is in trailer It is not forced in the case that running status is good, the stress for drawing connecting seat can be very big, and the stress of horizontal shock-absorbing connecting seat is relatively It is little, it is so, three is separately positioned, then it is unaffected each other so that the operation of trailer is more stable.
Description of the drawings
Fig. 1 is the stereogram of low-floor trailer bodies underframe.
Fig. 2 is low-floor trailer bodies underframe top view.
Fig. 3 is the side schematic view of low-floor trailer bodies underframe.
Fig. 4 is A-A sectional views in Fig. 1.
Fig. 5 is B-B sectional views in Fig. 1.
Specific embodiment
With reference to the accompanying drawings and detailed description the present invention will be described in further detail.
As shown in Figures 1 to 5, low-floor trailer bodies underframe include sleeper beam 1, longeron 2, side bar 3, Seat support beam 4, in Between seat 5, traction connecting seat 6 and horizontal shock-absorbing connecting seat 7.
As shown in Figure 1, Figure 2 with shown in Fig. 5, the whole car body of the lateral direction penetrating of sleeper beam 1;Sleeper beam 1 is included on sleeper beam lower cover 11, sleeper beam Cover plate 12, sleeper beam side plate 13, sleeper beam riser 14 and sleeper beam support plate 15.
Sleeper beam upper cover plate 12 is located at the top of sleeper beam lower cover 11;The first of more than two is provided with sleeper beam lower cover 11 Hollow out 111, is provided with second hollow out 121 of more than two on sleeper beam upper cover plate 12, to mitigate the weight of sleeper beam 1, and will not Affect the strength and stiffness of sleeper beam;Sleeper beam gusset 16, sleeper beam gusset are provided between sleeper beam lower cover 11 and sleeper beam upper cover plate 12 16 are made up of horizontal and vertical gusset;It is folded upward at forming described sleeper beam riser 14, sleeper beam at the two ends of sleeper beam lower cover 11 Riser 14 is connected with sleeper beam upper cover plate 12, and in the upper end of each sleeper beam riser 14 outside sleeper beam support plate 15 is connected with; The both sides of sleeper beam lower cover 11 and sleeper beam upper cover plate 12 are connected to described sleeper beam side plate 13, and sleeper beam side plate 13 extends to pillow The outer end of beam support plate and it is connected with sleeper beam riser 14 and sleeper beam support plate 15, position of the sleeper beam side plate 13 corresponding to sleeper beam riser 14 Put to form transition arc 131 and lower transition arc 132 so that the section of sleeper beam side plate 13 is of substantially equal, so, reducing should The phenomenon that power is concentrated, improves the strength and stiffness of sleeper beam 1, and in the position of sleeper beam support plate 15, sleeper beam side plate is higher than sleeper beam Board.The 3rd hollow out 151 of more than two is provided with sleeper beam support plate 15.Described sleeper beam lower cover 11, sleeper beam upper cover plate 12nd, sleeper beam side plate 13 constitutes box-structure, is mainly used in carrying larger horizontal, longitudinal direction and distortion power so that stress evenly, Stress concentration is less prone to, structure is more stable, is less prone to local fatigue destruction, and for the vehicle body bottom frame of the present invention, The vertical force that both sides are subject to is less, therefore, platy structure is designed simply to, so, the requirement for using, Er Qieneng can not only be reached Mitigate the weight of whole vehicle body bottom frame, bring conveniently to manufacture, reduce manufacturing cost, reduce tractive force, reduce energy The consumption of amount.
Gusset 17 is welded between sleeper beam riser 14 and sleeper beam support plate 15, is entered on the basis of sleeper beam weight is reduced One step improves the strength and stiffness of sleeper beam.
As shown in Figures 1 to 5, longeron 2 is connected in the middle part both sides of sleeper beam 1, i.e., is welded respectively in the both sides of sleeper beam 1 It is connected to longeron 2.Described longeron 2 includes end carriage 201 and longeron body 202, and end carriage 201 and longeron body 202 are structure as a whole, Longeron 2 is in T fonts.
Described longeron 2 includes longeron lower cover 21, longeron upper cover plate 22, end plate 23, end cap 24 and longeron side plate 25;It is vertical Beam lower cover 21 is in T fonts, and from end to sleeper beam direction, horizontal-extending the retreading at end carriage of longeron lower cover 21 upwardly extends so Horizontal-extending afterwards, the horizontal extension near sleeper beam 1 is divided into horizontal-extending section, and on longeron lower cover 21 more than two are provided with 4th hollow out 211, to mitigate the weight of longeron.Longeron upper cover plate 22 is in T fonts, from end to sleeper beam direction, longeron upper cover plate 22 at end carriage horizontal-extending retreading upwardly extend and then horizontal-extending, be divided near the horizontal extension of sleeper beam 1 horizontal-extending Section;The 5th hollow out 221 of more than two is provided with longeron upper cover plate 22, to mitigate the weight of longeron;On the basis of horizontal plane, The angle that longeron upper cover plate 22 extends obliquely is less than the angle that longeron lower cover 21 extends obliquely so that longeron upper cover plate 22 It is gradually reduced in the cross section of extension obliquely with longeron lower cover 21.Between longeron lower cover 21 and longeron upper cover plate 22 Longeron gusset 26 is welded with, the longeron gusset 26 includes horizontal and vertical gusset, to improve the strength and stiffness of longeron.
Longeron lower cover 21 away from being outwardly formed the first protuberance 28 in the middle part of the side of sleeper beam, longeron upper cover plate 22 away from The second protuberance 29 is outwardly formed in the middle part of the side of sleeper beam, is connected between the first protuberance 28 and the second protuberance 29 and is hinged Plate 210, the first protuberance 28, the second protuberance 29 and articulated slab 210 form hinged seat, conveniently the other car bodies of connection, and Hinged seat forms integrative-structure with longeron 2, can improve the intensity of hinged seat, in addition, after power is delivered on hinged seat, due to it It is structure as a whole, therefore, the power of Jing hinged seats can be smoothly delivered on longeron 2, be not in the phenomenon for being interrupted power transmission so that The transfer performance of power is good.
End plate 23 is connected to the side of longeron upper cover plate 22 and longeron lower cover 21 away from sleeper beam 1, while end plate 23 is located at The two ends of articulated slab 210.End cap 24 is connected to the two ends of the longeron upper cover plate positioned at end carriage 201 and longeron lower cover;In end cap 24 are provided with hole for hoist 241, to facilitate lifting, and as a result of the sleeper beam 1 and the structure of longeron 2 of the present invention, especially will Longeron body designs into a single integrated structure with end carriage, in lifting, deformation is less likely to occur in the middle part of vehicle body bottom frame.
Longeron side plate 25 is connected in the both sides of the inner side of end carriage 201 and longeron body 202;Above-mentioned described end The inner side of beam 201 refers to end carriage near the side of sleeper beam 1, due to 2 one-tenth of longeron it is T-shaped, longeron body 202 it is basic with end carriage 201 into Right angle, therefore, longeron side plate 25 can bend in longeron body 202 with the junction of end carriage 201, i.e., positioned at the longeron side plate of side For an overall structure.
As shown in Figures 1 to 5, described side bar 3 includes side bar body 31 and the buttress brace for being connected to side bar body two ends, Described buttress brace includes the first vertical beam 321, the second vertical beam 322, the first longeron 323, the second longeron 324, first crossbeam 325 and first diagonal brace 326;The lower end of the first vertical beam 321 is connected with end carriage 201, upper end and the side bar sheet of the first vertical beam 321 Body 31 connects;The lower end of the second vertical beam 322 is connected with the first longeron 323, upper end and the side bar body of the second vertical beam 322 202 connections;One end of first longeron 323 is connected with end carriage 201, and the other end of the first longeron 323 is connected with first crossbeam 325; One end of second longeron 324 is connected with end carriage 201, and the other end of the second longeron 324 is connected with first crossbeam 325;First crossbeam 325 one end is connected with longeron body 202;First diagonal brace 326 is connected between the first vertical beam 321 and the second vertical beam 322. The side bar intensity of the structure is good, it is not easy to deform.
As shown in Figures 1 to 5, Seat support beam 4 is by many 3rd vertical beams 41, many 3rd longerons 42 and Duo Gen second Crossbeam 43 constitutes frame structure, wherein, it is platy structure near the 3rd vertical beam of sleeper beam, the 3rd vertical beam of close sleeper beam Lower end is connected with longeron body, and with transition circle arc portion 401.Because a part for longeron body 202 tilts upward extension, when After the stress of end carriage 201, horizontal component and moment of flexure can be formed in horizontal-extending section of the longeron near sleeper beam 1, therefore, near sleeper beam 1 Horizontal-extending section of longeron be susceptible to deformation, and because the lower end of the 3rd vertical beam near sleeper beam is connected with longeron body, Therefore, the part being connected with longeron body in the 3rd vertical beam deforms, and easily causes the phenomenon of stress concentration, works as setting After transition circle arc portion, then above-mentioned technical problem can be solved.
Middle base 5 is welded with the central bottom of sleeper beam lower cover 11;Wherein a longeron and positioned near sleeper beam water Traction connecting seat 6 is welded with flat extension;It is in another longeron and horizontal positioned at being welded with horizontal-extending section of sleeper beam Damping connecting seat 7.For middle base 5, traction connecting seat 6 and horizontal shock-absorbing connecting seat 7, the stress of this three is different, middle base 5 It is not forced in the case where trailer running status is good, the stress for drawing connecting seat 6 can be very big, horizontal shock-absorbing connecting seat 7 is received Power is relatively small, so, three is separately positioned, then be unaffected each other so that the operation of trailer is more steady It is fixed.

Claims (10)

1. a kind of low-floor trailer bodies underframe, including sleeper beam, longeron, side bar and Seat support beam;Sleeper beam lateral direction penetrating is whole Car body;In the side bar that is respectively provided on two sides with of vehicle body bottom frame, side bar is connected with sleeper beam, longeron and Seat support beam;It is characterized in that:
Sleeper beam includes sleeper beam lower cover, sleeper beam upper cover plate, sleeper beam side plate, sleeper beam riser and sleeper beam support plate;Sleeper beam upper cover plate position In the top of sleeper beam lower cover, it is folded upward at forming described sleeper beam riser, sleeper beam riser and pillow at the two ends of sleeper beam lower cover Beam upper cover plate is connected, and outside sleeper beam support plate is connected with the upper end of each sleeper beam riser, in sleeper beam lower cover and sleeper beam The both sides of upper cover plate are connected to described sleeper beam side plate, and sleeper beam side plate extends to the outer end of sleeper beam support plate and stands with sleeper beam Plate and sleeper beam support plate connect, and in the position of sleeper beam support plate, sleeper beam side plate is higher than sleeper beam support plate;In sleeper beam lower cover and pillow Sleeper beam gusset is provided between beam upper cover plate;
Longeron is connected in the middle part both sides of sleeper beam;Described longeron includes end carriage and longeron body, end carriage and longeron sheet Body is structure as a whole, and longeron is in T fonts;Described longeron includes longeron lower cover, longeron upper cover plate, end plate, end cap and longeron Side plate;Longeron lower cover is in T fonts, from end to sleeper beam direction, is prolonged obliquely after longeron lower cover is horizontal-extending at end carriage Stretch and then horizontal-extending;Longeron upper cover plate is in T fonts, and from end to sleeper beam direction, longeron upper cover plate is horizontal-extending at end carriage Retread and upwardly extend and then horizontal-extending;On the basis of horizontal plane, the angle that longeron upper cover plate extends obliquely is less than under longeron The angle that cover plate extends obliquely so that longeron upper cover plate gradually subtracts with longeron lower cover in the cross section of extension obliquely It is little;End plate connection longeron upper cover plate and longeron lower cover away from sleeper beam side;End cap is connected on the longeron of end carriage The two ends of cover plate and longeron lower cover;Longeron side plate is connected in the both sides of the inner side of end carriage and longeron body;In longeron Longeron gusset is connected between upper cover plate and longeron lower cover;
Seat support beam is connected with sleeper beam, longeron and side bar.
2. low-floor trailer bodies underframe according to claim 1, it is characterised in that:Two are provided with sleeper beam lower cover The first hollow out above, is provided with second hollow out of more than two on sleeper beam upper cover plate;Be provided with sleeper beam support plate two with On the 3rd hollow out.
3. low-floor trailer bodies underframe according to claim 1, it is characterised in that:Sleeper beam side plate corresponds to sleeper beam riser Position form transition arc and lower transition arc.
4. low-floor trailer bodies underframe according to claim 1, it is characterised in that:In sleeper beam riser and sleeper beam support plate Between be welded with gusset.
5. low-floor trailer bodies underframe according to claim 1, it is characterised in that:Two are provided with longeron lower cover The 4th hollow out above, is provided with the 5th hollow out of more than two on longeron upper cover plate.
6. low-floor trailer bodies underframe according to claim 1, it is characterised in that:Longeron lower cover away from sleeper beam one Be outwardly formed the first protuberance in the middle part of side, longeron upper cover plate away from being outwardly formed the second protuberance in the middle part of the side of sleeper beam, Articulated slab is connected between first protuberance and the second protuberance, the first protuberance, the second protuberance and articulated slab are formed and be hinged Seat.
7. low-floor trailer bodies underframe according to claim 1, it is characterised in that:Hole for hoist is provided with end cap.
8. low-floor trailer bodies underframe according to claim 1, it is characterised in that:Described side bar includes side bar body With the buttress brace for being connected to side bar body two ends, described buttress brace include the first vertical beam, the second vertical beam, the first longeron, Second longeron, first crossbeam and the first diagonal brace;The lower end of the first vertical beam is connected with end carriage, the upper end of the first vertical beam and side bar Body connects;The lower end of the second vertical beam is connected with the first longeron, and the upper end of the second vertical beam is connected with side bar body;First indulges One end of beam is connected with end carriage, and the other end of the first longeron is connected with first crossbeam;One end of second longeron is connected with end carriage, the The other end of two longerons is connected with first crossbeam;One end of first crossbeam is connected with longeron body;First diagonal brace is connected to first Between vertical beam and the second vertical beam.
9. low-floor trailer bodies underframe according to claim 1, it is characterised in that:Seat support beam is hung down by many 3rd Straight beam, many 3rd longerons and Duo Gen second cross beams composition frame structure, wherein, it is tabular knot near the 3rd vertical beam of sleeper beam Structure, the lower end near the 3rd vertical beam of sleeper beam is connected with longeron body, and with transition circle arc portion.
10. low-floor trailer bodies underframe according to claim 1, it is characterised in that:Weld in the central bottom of sleeper beam There is middle base;A longeron and it is welded with traction connecting seat positioned on horizontal-extending section of sleeper beam wherein;In another longeron And it is welded with horizontal shock-absorbing connecting seat positioned on horizontal-extending section of sleeper beam.
CN201510517413.1A 2015-08-21 2015-08-21 Chassis of low-floor trailer body Active CN105015571B (en)

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CN109808725B (en) * 2017-11-22 2020-10-16 中车唐山机车车辆有限公司 Control vehicle chassis and control vehicle
CN111361590B (en) * 2018-12-25 2021-01-05 中车唐山机车车辆有限公司 Double-deck rail vehicle and automobile body thereof
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CN110682931B (en) * 2019-10-28 2020-08-25 中铁轨道交通装备有限公司 Car body chassis and have its tram

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