CN112937623A - Rail vehicle chassis with large-section traction and bolster buffering structure - Google Patents
Rail vehicle chassis with large-section traction and bolster buffering structure Download PDFInfo
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- CN112937623A CN112937623A CN202110332946.8A CN202110332946A CN112937623A CN 112937623 A CN112937623 A CN 112937623A CN 202110332946 A CN202110332946 A CN 202110332946A CN 112937623 A CN112937623 A CN 112937623A
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- floor
- traction
- sleeper
- bolster
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F1/00—Underframes
- B61F1/08—Details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F1/00—Underframes
- B61F1/08—Details
- B61F1/10—End constructions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F19/00—Wheel guards; Bumpers; Obstruction removers or the like
- B61F19/04—Bumpers or like collision guards
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
- B61G9/00—Draw-gear
- B61G9/20—Details; Accessories
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Abstract
The invention discloses a rail vehicle underframe with a large-section traction and bolster structure, which comprises a traction and bolster buffer, a front end beam, a left side beam, a right side beam and a floor, wherein the first traction and bolster buffer comprises a small traction beam, a buffer beam, a large traction beam and a bolster, the floor comprises an inner bolster floor, an outer pillow left floor, an outer pillow right floor, an end floor, a middle cover plate and a floor transition profile, the front end beam is connected with the left side beam, the right side beam and the small traction beam, the end floor is arranged on the left side beam and the right side beam, the middle cover plate is arranged on the large traction beam, the outer pillow left floor is arranged on the large traction beam and the left side beam, the outer pillow right floor is arranged on the large traction beam and the right side beam, the floor transition profile is arranged on the bolster beam, the inner pillow floor is inserted into the floor transition profile, the inner pillow floor is arranged on the left side beam and the right side beam, the upper surfaces of the one-position buffer beam, the one-position large traction beam and the one-position sleeper beam are flush with the upper surface of the floor. The structural strength is improved.
Description
Technical Field
The invention relates to the technical field of rail vehicle structures, in particular to a rail vehicle underframe with a large-section traction and bolster buffering structure.
Background
The subway is a rapid, large-traffic and electric power traction rail transit built in cities, and belongs to one of urban rail transit types.
The train runs on a totally closed line, conventionally, the line located in a central urban area is basically arranged in an underground tunnel, the line outside the central urban area is generally arranged on a viaduct or the ground, and the subway is an urban rail transit system which covers various underground and overground rights of roads in the urban area, is high in density and high in traffic volume.
At present, in some subway vehicles in operation, the problem of cracks can occur at the lower cover plate of the traction and bolster buffering area of the underframe, vehicles with cracks in the traction and bolster buffering area mainly appear on aluminum alloy vehicle bodies operated for 10 to 15 years, and the vehicle bodies are structurally characterized in that the traction and bolster buffering is welded to the lower surface of a full-length floor, the sections of the traction and bolster buffering are small, and the longitudinal rigidity is poor.
The traction and bolster buffer assembly is not only an important component of a railway passenger car underframe, but also a basic part formed by a car body steel structure, and comprises three parts, namely a buffer beam, a bolster beam and a traction beam. It should also be noted that the size of the rear set of the traction and bolster restraint can directly affect the size of the steel structure of the car body, and even can affect the quality of the whole car.
Therefore, how to provide a railway vehicle underframe with a large-section traction and bolster buffering structure to improve the structural strength is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a railway vehicle underframe with a large-section traction and bolster buffering structure, so as to improve the structural strength.
In order to achieve the purpose, the invention provides the following technical scheme:
a rail vehicle underframe with a large-section traction and bolster buffer structure comprises a traction and bolster buffer, a front end beam, a left side beam, a right side beam and a floor,
the one-position traction and bolster buffer comprises a one-position small traction beam, a one-position buffer beam, a one-position large traction beam and a one-position bolster which are connected in sequence,
the floor comprises an inner sleeper floor, an outer sleeper left floor, an outer sleeper right floor, a first end floor, a first middle cover plate and a first floor transition section,
the two ends of the front end beam are respectively connected with one end of the left side beam and one end of the right side beam, the middle part of the front end beam is connected with the small traction beam,
the one-position small traction beam is provided with the one-position end floor, two sides of the one-position end floor are respectively erected and fixed on the left side beam and the right side beam,
the one-position big traction beam comprises a left big traction beam and a right big traction beam which are arranged at intervals, two sides of the one-position middle cover plate are respectively erected and fixed on the one-position left big traction beam and the one-position right big traction beam, two sides of the one-position sleeper outer left floor are respectively erected and fixed on the one-position left big traction beam and the left side beam, two sides of the one-position sleeper outer right floor are respectively erected and fixed on the one-position right big traction beam and the right side beam,
the first end floor is abutted against one end of the first middle cover plate, the first outer sleeper left floor and the first outer sleeper right floor, the other end of the first middle cover plate, the first outer sleeper left floor and the first outer sleeper right floor is erected and fixed on the first sleeper beam,
the one-position floor transition section is erected on the one-position sleeper beam, one end of the sleeper inner floor is inserted on the one-position floor transition section, two sides of the sleeper inner floor are respectively erected and fixed on the left side beam and the right side beam,
the upper surfaces of the one-position buffer beam, the one-position large traction beam and the one-position sleeper beam are flush with the upper surface of the floor.
Preferably, the underframe of the railway vehicle with the large-section traction and bolster buffer structure further comprises a two-position traction and bolster buffer, a rear end beam, a two-position outer left floor, a two-position outer right floor, a two-position end floor, a two-position middle cover plate and a two-position floor transition section,
the two-position traction bolster comprises a two-position small traction beam, a two-position buffer beam, a two-position large traction beam and a two-position bolster which are connected in sequence,
two ends of the rear end beam are respectively connected with the other ends of the left side beam and the right side beam, the middle part of the rear end beam is connected with the two-position small traction beam,
the two-position end floor is arranged on the two-position small traction beam, two sides of the two-position end floor are respectively erected and fixed on the left side beam and the right side beam,
the two-position big traction beam comprises a two-position left big traction beam and a two-position right big traction beam which are arranged at intervals, two sides of the two-position middle cover plate are respectively erected and fixed on the two-position left big traction beam and the two-position right big traction beam, two sides of the two-position left floor outside the pillow are respectively erected and fixed on the two-position left big traction beam and the left side beam, two sides of the two-position right floor outside the pillow are respectively erected and fixed on the two-position right big traction beam and the right side beam,
the two-position end floor is abutted against one end of the two-position middle cover plate, one end of the two-position pillow outer left floor and one end of the two-position pillow outer right floor, the other ends of the two-position middle cover plate, the two-position pillow outer left floor and the two-position pillow outer right floor are erected and fixed on the two-position pillow beam,
the two-position floor transition section bar is erected on the two-position sleeper beam, the other end of the sleeper inner floor is inserted on the two-position floor transition section bar,
the upper surfaces of the two-position buffer beam, the two-position large traction beam and the two-position sleeper beam are flush with the upper surface of the floor.
Preferably, the underframe of the railway vehicle with the large-section traction and bolster buffering structure further comprises an energy absorption device, the energy absorption device is fixedly connected with the front end beam,
the energy absorption device comprises a corrugated bottom plate and an end cross beam, two ends of the end cross beam are respectively connected with the front end beam through an energy absorption side beam which is a bent beam,
an energy-absorbing longitudinal beam is arranged between the end cross beam and the front end beam, and the corrugated bottom plate is laid on the end cross beam, the energy-absorbing longitudinal beam and the energy-absorbing side beam and is fixedly connected with the end cross beam, the energy-absorbing longitudinal beam and the energy-absorbing side beam.
Preferably, the one-position floor transition section bar and the in-sleeper floor are in an inserted connection structure and are welded and fixed.
Preferably, the one-position sleeper beam and the one-position floor transition section are in an overlapping structure and are welded and fixed.
Preferably, the left side beam and the sleeper inner floor are in a lap joint structure and are welded and fixed.
Preferably, the one-position end floor and the left side beam are in a lap joint structure and are welded and fixed.
Preferably, two sides of the one-position middle cover plate are respectively erected and fixed on the inner side of the one-position left big traction beam and the inner side of the one-position right big traction beam and welded by adopting HV welding seams,
the upper surface of the one-position middle cover plate is flush with the upper surfaces of the one-position left big traction beam and the one-position right big traction beam,
the one-position sleeper outer left floor is erected and fixed on the one-position left big traction beam, the front side of the one-position sleeper outer left floor is welded by adopting HV welding seams, the back side of the one-position sleeper outer left floor is welded by adopting lap fillet welding seams,
and the right floor outside the one-position pillow is erected and fixed on the one-position right big traction beam, the front side of the one-position right big traction beam is welded by adopting an HV welding line, and the back side of the one-position right big traction beam is welded by adopting an overlap fillet welding line.
Preferably, the front end beam, the left side beam and the right side beam are welded by tailor welding with a rib-removing groove at the end part of the section bar.
Preferably, the railway vehicle underframe with the large-section traction and bolster buffering structure further comprises a frame seat, a bogie stop seat, a trailer hook and an anti-side-rolling torsion rod seat, wherein the frame seat, the bogie stop seat, the trailer hook and the anti-side-rolling torsion rod seat are riveted on the left side beam and the right side beam through blind rivets.
The invention provides a rail vehicle underframe with a large-section traction and bolster structure, which comprises a traction and bolster buffer, a front end beam, a left side beam, a right side beam and a floor, wherein the traction and bolster buffer comprises a small traction beam, a buffer beam, a large traction beam and a bolster beam which are sequentially connected, the floor comprises an inner bolster floor, an outer sleeper left floor, an outer sleeper right floor, a first end floor, a middle cover plate and a floor transition profile, two ends of the front end beam are respectively connected with one ends of the left side beam and the right side beam, the middle part of the front end beam is connected with the small traction beam, the first end floor is arranged on the small traction beam, two sides of the first end floor are respectively erected and fixed on the left side beam and the right side beam, the first large traction beam comprises a left large traction beam and a right large traction beam which are arranged at intervals, the two sides of the one-position middle cover plate are respectively erected and fixed on the one-position left big traction beam and the one-position right big traction beam, the two sides of the one-position left floor outside the pillow are respectively erected and fixed on the one-position left big traction beam and the left side beam, the two sides of the one-position right floor outside the pillow are respectively erected and fixed on the one-position right big traction beam and the right side beam, the one-position end floor is abutted against one end of the one-position middle cover plate, the one-position left floor outside the pillow and one end of the one-position right floor outside the pillow, the other end of the one-position middle cover plate, the one-position left floor outside the pillow and the other end of the one-position right floor outside the pillow are erected and fixed on the one-position pillow beam, the one-position floor transition section bar is erected on the one-position pillow beam, one end of the inner floor is inserted and connected on the one-position floor transition section bar, the two sides of, the upper surfaces of the one-position buffer beam, the one-position large traction beam and the one-position sleeper beam are flush with the upper surface of the floor.
According to the railway vehicle underframe with the large-section traction and bolster buffering structure, the section height of the traction and bolster buffering area is lifted to the floor surface, the design concept that the traction and bolster buffering is welded to the lower surface of the floor in the traditional scheme is changed, the longitudinal rigidity of the traction and bolster buffering structure is greatly increased, the structural strength is improved, and fatigue cracks generated in the coupler seat and the area nearby the coupler seat under the impact of coupler load for a long time are effectively avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a back explosion structure of a railway vehicle underframe with a large-section traction and bolster buffering structure according to an embodiment of the present invention;
FIG. 2 is a schematic view of a connection structure of a sleeper beam, a floor transition section and an in-sleeper floor according to an embodiment of the present invention;
FIG. 3 is a schematic view of a connection structure of a left side rail and an in-pillow floor according to an embodiment of the present invention;
FIG. 4 is a schematic view of a connection structure of a left out-of-pillow floor, a right out-of-pillow floor, a left large draft sill, a right large draft sill, and a middle cover plate according to an embodiment of the present invention;
FIG. 5 is a schematic view of a back-side connection structure of an energy absorber and a front end beam according to an embodiment of the present invention;
FIG. 6 is a schematic view of a mounting attachment provided on a left side rail according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of an air spring mounting location for a bolster according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a single-bit draft according to an embodiment of the present invention;
FIG. 9 is a schematic back view of an energy absorber according to an embodiment of the present invention.
In the above FIGS. 1-9:
a one-position traction bolster buffer 1, an energy absorption device 2, an inner bolster floor 3, a left side beam 4, a right side beam 5, a front end beam 6, a one-position floor transition section 7, a two-position floor transition section 8, a one-position end floor 9, a one-position outer left floor 10, a one-position outer right floor 11, a one-position middle cover plate 12, a two-position end floor 13, a two-position traction bolster buffer 14, a mounting accessory 15, a one-position bolster beam 16, a one-position left big traction beam 17, a one-position right big traction beam 18, a section end reinforcement removing groove tailor-welding 19, a peripheral fillet welding seam 20, a towing hook 21, a blind rivet 22, an anti-side torsion bar seat 23, a driving seat 24, an air spring mounting surface 25, an air spring air inlet seat 26, a nitrile rubber cushion 27, a one-position small traction beam 28, a one-position buffer beam 29, a coupler seat 30, a friction stir welding seam 31, an end cross beam 32, a corrugated bottom plate 33, an energy absorption 34, a, A right outer floor 37 of the two-position sleeper, a rear end beam 38.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 9, fig. 1 is a schematic diagram of a back explosion structure of a railway vehicle underframe with a large-section tie-down buffering structure according to an embodiment of the present invention; FIG. 2 is a schematic view of a connection structure of a sleeper beam, a floor transition section and an in-sleeper floor according to an embodiment of the present invention; FIG. 3 is a schematic view of a connection structure of a left side rail and an in-pillow floor according to an embodiment of the present invention; FIG. 4 is a schematic view of a connection structure of a left out-of-pillow floor, a right out-of-pillow floor, a left large draft sill, a right large draft sill, and a middle cover plate according to an embodiment of the present invention; FIG. 5 is a schematic view of a back-side connection structure of an energy absorber and a front end beam according to an embodiment of the present invention; FIG. 6 is a schematic view of a mounting attachment provided on a left side rail according to an embodiment of the present invention; FIG. 7 is a schematic diagram of an air spring mounting location for a bolster according to an embodiment of the present invention; FIG. 8 is a schematic structural diagram of a single-bit draft according to an embodiment of the present invention; FIG. 9 is a schematic back view of an energy absorber according to an embodiment of the present invention.
The railway vehicle underframe with the large-section traction and bolster structure comprises a traction and bolster buffer 1, a front end beam 6, a left side beam 4, a right side beam 5 and a floor, wherein the traction and bolster buffer 1 comprises a small traction beam 28, a buffer beam 29, a large traction beam and a bolster beam 16 which are sequentially connected, the floor comprises an inner bolster floor 3, an outer bolster left floor 10, an outer bolster right floor 11, a one-position end floor 9, a middle cover plate 12 and a one-position floor transition section bar 7, two ends of the front end beam 6 are respectively connected with one ends of the left side beam 4 and the right side beam 5, the middle part of the front end beam 6 is connected with the one-position small traction beam 28, the one-position end floor 9 is arranged on the one-position small traction beam 28, two sides of the one-position end floor 9 are respectively erected and fixed on the left side beam 4 and the right side beam 5, the one-position large traction beam comprises a left large traction beam 17 and a right large traction beam 18 which are arranged at intervals, two sides of a middle cover plate 12 are respectively erected and fixed on a left big traction beam 17 and a right big traction beam 18, two sides of a left sleeper-out floor 10 are respectively erected and fixed on a left big traction beam 17 and a left side beam 4, two sides of a right sleeper-out floor 11 are respectively erected and fixed on a right big traction beam 18 and a right side beam 5, a one-position end floor 9 is abutted against one end of the middle cover plate 12, the one-position left sleeper-out floor 10 and the one-position right sleeper-out floor 11, the other ends of the middle cover plate 12, the one-position left sleeper-out floor 10 and the one-position right sleeper-out floor 11 are erected and fixed on a sleeper beam 16, a one-position floor transition section 7 is erected on a sleeper beam 16, one end of an inner sleeper-in floor 3 is inserted and welded on a floor transition section 7, two sides of the inner sleeper-in floor 3 are respectively erected and fixed on the left side beam 4 and the right side beam 5, a buffer beam 29, a, The upper surfaces of a large draft sill and a bolster 16 are flush with the upper surface of the floor.
According to the railway vehicle underframe with the large-section traction and bolster buffering structure provided by the embodiment of the invention, the section height of the traction and bolster buffering area is lifted to the floor surface, and the design concept that the traction and bolster buffering is welded below the floor in the traditional scheme is changed, so that the longitudinal rigidity of the traction and bolster buffering structure is greatly increased, the structural strength is improved, and fatigue cracks generated in the lower hook seat and the area nearby the lower hook seat due to long-term impact of a coupler load are effectively avoided.
For convenience of understanding, the rail vehicle underframe with a large-section tie-down and buffer structure according to the present invention is determined in front, rear, left, and right with reference to fig. 1, but is not limited thereto.
In order to further optimize the scheme, the underframe of the railway vehicle with the large-section traction and bolster buffer structure further comprises a two-position traction and bolster buffer 14, a rear end beam 38, a two-position outer left floor 36, a two-position outer right floor 37, a two-position end floor 13, a two-position middle cover plate and a two-position floor transition section bar 8,
the two-position traction and bolster 14 comprises a two-position small traction beam, a two-position buffer beam, a two-position big traction beam and a two-position bolster which are connected in sequence,
two ends of the rear end beam 38 are respectively connected with the other ends of the left beam 4 and the right beam 5, the middle part of the rear end beam 38 is connected with the two-position small traction beam,
a two-position end floor 13 is arranged on the two-position small traction beam, two sides of the two-position end floor 13 are respectively erected and fixed on the left side beam 4 and the right side beam 5,
the two-position big traction beam comprises a two-position left big traction beam and a two-position right big traction beam which are arranged at intervals, two sides of a two-position middle cover plate are respectively erected and fixed on the two-position left big traction beam and the two-position right big traction beam, two sides of a two-position pillow outer left floor 36 are respectively erected and fixed on the two-position left big traction beam and the left edge beam 4, two sides of a two-position pillow outer right floor 37 are respectively erected and fixed on the two-position right big traction beam and the right edge beam 5,
the two-position end floor 13 is abutted against one end of a two-position middle cover plate, a two-position outer left floor 36 and a two-position outer right floor 37, the other end of the two-position middle cover plate, the two-position outer left floor 36 and the two-position outer right floor 37 is erected and fixed on a two-position sleeper beam,
the two-position floor transition section bar 8 is erected on the two-position sleeper beam, the other end of the inner sleeper floor 3 is inserted on the two-position floor transition section bar 8,
the upper surfaces of the two-position buffer beam, the two-position large traction beam and the two-position sleeper beam are flush with the upper surface of the floor.
According to the rail vehicle underframe with the large-section traction and bolster buffering structure provided by the embodiment of the invention, the floor is arranged in a blocking manner, and comprises the inner bolster floor, the first-position outer left floor, the first-position outer right floor, the second-position outer left floor and the second-position outer right floor, so that the height of the first-position traction and bolster buffering and the height of the second-position traction and bolster buffering are increased relative to the prior art, and the upper surfaces of the traction and bolster buffering participate in forming a floor surface plane. The height of the traction and bolster buffer is increased, so that the traction and bolster buffer can be larger, the cross section is increased, and the structural strength is improved.
In order to further optimize the scheme, the underframe of the large-section traction and bolster buffering structure of the railway vehicle further comprises an energy absorption device 2, the energy absorption device 2 is fixedly connected with a front end beam 6,
the energy absorption device 2 comprises a corrugated bottom plate 33 and an end cross beam 32, two ends of the end cross beam 32 are respectively connected with the front end beam 6 through an energy absorption side beam 35, the energy absorption side beam 35 is a bent beam,
an energy-absorbing longitudinal beam 34 is arranged between the end cross beam 32 and the front end beam 6, and the corrugated bottom plate 33 is laid on the end cross beam 32, the energy-absorbing longitudinal beam 34 and the energy-absorbing side beam 35 and is fixedly connected with the end cross beam 32, the energy-absorbing longitudinal beam 34 and the energy-absorbing side beam 35.
Specifically, the one-position floor transition profile 7 and the sleeper inner floor 3 adopt an insertion structure and are welded and fixed, and the specific structure is that a welding backing plate is arranged in one side of the one-position floor transition profile 7, and an opening profile is arranged in one side of the sleeper inner floor 3, as shown in fig. 2.
Specifically, the one-position sleeper beam 16 and the one-position floor transition section bar 7 adopt an overlapping structure and are welded and fixed, and the concrete structure is that a first concave surface is arranged on the upper surface of the one-position sleeper beam 16, a first extending plate is arranged on the side wall of the one-position sleeper beam 16 and below the first concave surface,
a second extension plate is arranged on the other side of the floor transition profile 7, the second extension plate is arranged on the first concave surface in a lap mode, the upper surface of the sleeper beam 16 is flush with the upper surface of the floor transition profile 7,
a floor transition profile 7 is placed on the first extension panel at its lower part.
Specifically, the left side beam 4 and the in-pillow floor 3 adopt an overlapping structure and are welded and fixed, and the concrete structure is that the left side beam 4 comprises a left beam body, a left convex part is arranged on the right side wall of the left beam body, a second concave surface is arranged on the upper surface of the left convex part, a third extending plate is arranged on the side wall of the left side beam 4 and below the second concave surface,
a fourth extending plate is arranged on the in-pillow floor 3, the fourth extending plate is overlapped on the second concave surface, the upper surface of the left convex part is flush with the upper surface of the in-pillow floor 3,
the lower part of the in-pillow floor 3 is erected on the third extension board.
The first-position end floor 9 and the left beam 4 adopt a lap joint structure and are welded and fixed, and the concrete structure is that a fifth extending plate is arranged on the first-position end floor 9, the fifth extending plate is overlapped on the second concave surface, the upper surface of the left convex part is flush with the upper surface of the first-position end floor 9,
the lower part of the one-end floor 9 is erected on the third extension board.
The two sides of the middle cover plate 12 are respectively erected and fixed on the inner side of a left big traction beam 17 and the inner side of a right big traction beam 18, the concrete structure is that the inner side of the left big traction beam 17 is provided with a sixth extension plate, the inner side of the right big traction beam 18 is provided with a seventh extension plate, the two sides of the middle cover plate 12 are respectively erected and fixed on the sixth extension plate and the seventh extension plate and welded by adopting HV welding seams,
the upper surface of an intermediate deck 12 is flush with the upper surfaces of a left large draft sill 17 and a right large draft sill 18,
the one-position sleeper outer left floor 10 is erected and fixed on a one-position left big traction beam 17, the front surface of the one-position sleeper outer left floor is welded by HV welding seams, the back surface of the one-position sleeper outer left floor is welded by lap fillet welding seams,
the one-position sleeper outer right floor 11 is erected and fixed on a one-position right large traction beam 18, the front side of the one-position sleeper outer right floor is welded by HV welding seams, and the back side of the one-position sleeper outer right floor is welded by lap fillet welding seams.
The front end beam 6 is welded with the left beam 4 and the right beam 5 by the edge-removing groove tailor welding 19 at the end part of the section bar, as shown in fig. 5.
In order to further optimize the scheme, the railway vehicle underframe with the large-section traction and bolster buffering structure further comprises a frame saddle 24, a bogie stop seat, a trailer hook 21 and a side rolling resistance rod seat 23, wherein the frame saddle 24 is riveted on the left side beam 4 and the right side beam 5 through blind rivets 22.
The invention provides a railway vehicle underframe with a large-section traction and bolster buffering structure, which is designed to solve the problem that cracks appear on a lower cover plate of a traction and bolster buffering area of the subway vehicle underframe in operation. Through investigation, vehicles with cracks in the traction and bolster buffering area mainly appear on aluminum alloy vehicle bodies operated for 10 to 15 years, and the vehicle bodies are structurally characterized in that the traction and bolster buffering area is welded to the lower surface of the full-length floor, the section of the traction and bolster buffering area is small, and the longitudinal rigidity is poor.
The invention provides a railway vehicle underframe with a large-section traction and bolster buffering structure, which is an underframe structure for tailor welding of a large-section profile traction and bolster buffering and a segmented floor.
The invention provides a railway vehicle underframe with a large-section traction and bolster buffering structure, which is formed by welding various profiles and plates, wherein the key positions of the traction and bolster buffering are welded by using an advanced friction stir welding technology, and the specific technical route is as follows:
(1) the underframe adopts a structural form of tailor welding of a large-section profile draft bolster and a block floor, the upper surface of the whole draft bolster structure is flush with the floor surface, and the sleeper beam composition, the draft beam composition and the coupler seat 30 composition are welded and formed by Friction Stir Welding (FSW), namely a welding seam 31 of the friction stir welding shown in figure 8, so that the effect of improving the integral rigidity of the car body is achieved;
(2) the front end of the underframe is provided with a collision energy-absorbing area structure, when a vehicle collides, the open pore beam on the energy-absorbing structure deforms orderly and stably, so that the vehicle body participates in energy absorption, and the passenger room area is effectively ensured not to deform, thereby ensuring the life safety of passengers and conforming to the anti-collision design concept;
(3) the frame saddle 24, the bogie stop seat, the anti-side rolling torsion bar seat 23, the trailer hook 21 and other accessories with interfaces outside on the underframe are arranged on the edge beam of the underframe in a riveting mode of blind rivets 22, so that the repair and the replacement are convenient.
The invention provides a railway vehicle underframe with a large-section traction and bolster buffering structure, which adopts the overall scheme that:
the sections of the traction beam and the sleeper beam are enlarged, and the upper surfaces of the traction beam and the sleeper beam are lifted to be flush with the upper surface of the aluminum floor, so that the traditional full-length aluminum floor is changed into a block design.
The in-sleeper floor 3 is connected with the sleeper beam through the front and rear floor transition section bars, the in-sleeper floor 3 and the floor transition section bar are installed in an inserting mode, and the floor transition section bar and the sleeper beam are installed in an overlapping mode, as shown in fig. 2.
The joint of the sleeper beam and the sleeper inner floor 3 is designed into a form of increasing the connection of transition section bars, and has two functions: (1) after the transition section is added, the butt weld joint is converted into an overlap fillet weld joint, the weld joint strength is improved, and stress concentration is not easy to generate; (2) the transition profile lap joint mode is adopted to provide longitudinal adjustment amount for the underframe assembly.
The in-pillow floor 3 is mounted in lap joint with the left and right side rails 4, 5, the floor is lapped on the side rails, and the end floor and the side rails are mounted in the same manner, as shown in fig. 3.
Welding joints are arranged on two sides of the upper surface of the traction beam, a support rib plate is arranged on the outer side of the vertical surface of the traction beam, a floor outside the sleeper is lapped on the support rib plate of the traction beam, an HV welding seam is adopted on the front surface, and an overlap fillet welding seam is adopted on the back surface; the intermediate cover plate 12 is mounted in the middle of the draft sill and the circumference is welded with HV welds, as shown in fig. 4.
The front end beam, the rear end beam and the side beam adopt a traditional section bar end reinforcement-removing groove-opening tailor welding mode, the main welding line mode is an HV welding line, and a fillet welding line is locally adopted. The front end of the underframe is designed with a car body energy absorption area structure, the middle two energy absorption longitudinal beams 34 and the left and right energy absorption side beams 35 are connected with the front end beam 6 and are respectively welded by a circumferential fillet weld 20 and an HV butt weld, as shown in figure 5.
Mounting accessories 15 such as an overhead seat assembly, a bogie stop seat assembly, a trailer hook 54, an anti-side-rolling torsion rod seat 56 and the like are riveted on a side beam through blind rivets 55, as shown in fig. 6, an air spring air inlet seat 26 is mounted in the air spring coil center area of a sleeper beam and connected through inner hexagonal countersunk head screws, and a butadiene acrylonitrile rubber pad 27 serving as an adjusting pad is additionally mounted on an air spring mounting surface 25 as shown in fig. 7.
The invention provides a railway vehicle underframe with a large-section traction and bolster structure, which adopts a friction stir welding technology and a large-section profile traction and bolster structure, and comprises the following components in parts by weight:
the traction and bolster buffer structure comprises a car coupler mounting seat assembly, a buffer beam, a large traction beam assembly, a small traction beam assembly and a bolster. Wherein, the large traction beam assembly, the coupler seat assembly and the sleeper beam assembly adopt the friction stir welding technology.
The large traction beam assembly is formed by welding an upper section and a lower section; the sleeper beam assembly is formed by welding three two sectional materials, the coupler seat assembly is formed by symmetrically welding two same sectional materials, and a middle welding line is welded by single-shaft shoulder friction stir welding; the coupler seat assembly is connected with the bumper beam at two sides respectively, and is welded by single-shaft-shoulder friction stir welding in the same way, as shown in fig. 8.
The invention provides a railway vehicle underframe with a large-section traction and bolster buffering structure, wherein an energy absorption structure at the front end of the underframe is as follows:
the energy-absorbing structure consists of end cross beams, energy-absorbing side beams 35, perforated energy-absorbing beams, namely energy-absorbing longitudinal beams 34 and a corrugated floor 33. An anticreeper mounting interface is designed on the end cross beam 32, the energy-absorbing side beam 35 is designed into a middle bending structure, and a plurality of long holes are formed in the inner side of the energy-absorbing side beam to play a role in deformation guiding together, so that an orderly and stable deformation effect is achieved when collision occurs. Four long round holes are uniformly formed in the middle two energy-absorbing longitudinal beams 34 in the longitudinal direction, energy is absorbed in collision, and a corrugated aluminum plate with the thickness of 3mm is paved on the upper surface of the energy-absorbing structure to serve as a corrugated floor 33, so that the corrugated aluminum plate participates in energy absorption and serves as a cab floor, and as shown in fig. 9.
The invention provides a railway vehicle underframe with a large-section traction and bolster buffering structure, which comprises:
(1) the section height of the traction and bolster buffering area is lifted to the floor surface, the design concept that the traction and bolster buffering is welded to the lower surface of the floor in the traditional scheme is changed, the longitudinal rigidity of the traction and bolster buffering is greatly increased, and fatigue cracks generated by a lower hook seat and a nearby area of the lower hook seat after long-term impact of a coupler load are effectively avoided;
(2) the large traction beam assembly, the coupler seat assembly and the sleeper beam assembly on the underframe traction and bolster buffer structure are all formed by welding sectional materials together, and a friction stir welding technology is adopted, wherein the friction stir welding technology comprises double-shaft-shoulder friction stir welding and single-shaft-shoulder friction stir welding; the welding quality of the traction and bolster buffer is improved, and the deformation of the welding of the traction and bolster buffer is reduced.
(3) The traction and bolster buffering height rises to the position of the upper plane of the floor, the floor of the whole underframe is arranged in a blocking mode, a reasonable installation mode is adopted according to the structural characteristics of each floor, particularly, transition sections are additionally arranged around the pillow inner floor, and then the floor is welded with the sleeper beam, so that the welding quality of the area of the pillow inner floor is improved, and meanwhile, the longitudinal adjustment amount is provided for the assembly of the pillow inner floor.
(4) The front end of the underframe is provided with an energy absorption structure, when a vehicle collides, the energy absorption structure is orderly and stably deformed, the structure of a passenger room area is fully protected from being damaged, and the life safety of passengers is effectively protected. The scheme accords with the anti-collision design concept and plays a role in vehicle body participation energy absorption.
(5) Vulnerable accessories with external interfaces on the chassis are riveted and installed by blind rivets 22, so that the purposes of convenient maintenance and easy replacement are achieved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A rail vehicle underframe with a large-section traction and bolster buffering structure is characterized by comprising a traction and bolster buffering structure, a front end beam, a left side beam, a right side beam and a floor,
the one-position traction and bolster buffer comprises a one-position small traction beam, a one-position buffer beam, a one-position large traction beam and a one-position bolster which are connected in sequence,
the floor comprises an inner sleeper floor, an outer sleeper left floor, an outer sleeper right floor, a first end floor, a first middle cover plate and a first floor transition section,
the two ends of the front end beam are respectively connected with one end of the left side beam and one end of the right side beam, the middle part of the front end beam is connected with the small traction beam,
the one-position small traction beam is provided with the one-position end floor, two sides of the one-position end floor are respectively erected and fixed on the left side beam and the right side beam,
the one-position big traction beam comprises a left big traction beam and a right big traction beam which are arranged at intervals, two sides of the one-position middle cover plate are respectively erected and fixed on the one-position left big traction beam and the one-position right big traction beam, two sides of the one-position sleeper outer left floor are respectively erected and fixed on the one-position left big traction beam and the left side beam, two sides of the one-position sleeper outer right floor are respectively erected and fixed on the one-position right big traction beam and the right side beam,
the first end floor is abutted against one end of the first middle cover plate, the first outer sleeper left floor and the first outer sleeper right floor, the other end of the first middle cover plate, the first outer sleeper left floor and the first outer sleeper right floor is erected and fixed on the first sleeper beam,
the one-position floor transition section is erected on the one-position sleeper beam, one end of the sleeper inner floor is inserted on the one-position floor transition section, two sides of the sleeper inner floor are respectively erected and fixed on the left side beam and the right side beam,
the upper surfaces of the one-position buffer beam, the one-position large traction beam and the one-position sleeper beam are flush with the upper surface of the floor.
2. The underframe of a railway vehicle with a large-section traction and bolster buffering structure as claimed in claim 1, further comprising a two-position traction and bolster buffer, a rear end beam, a two-position outer left floor, a two-position outer right floor, a two-position end floor, a two-position middle cover plate and a two-position floor transition profile,
the two-position traction bolster comprises a two-position small traction beam, a two-position buffer beam, a two-position large traction beam and a two-position bolster which are connected in sequence,
two ends of the rear end beam are respectively connected with the other ends of the left side beam and the right side beam, the middle part of the rear end beam is connected with the two-position small traction beam,
the two-position end floor is arranged on the two-position small traction beam, two sides of the two-position end floor are respectively erected and fixed on the left side beam and the right side beam,
the two-position big traction beam comprises a two-position left big traction beam and a two-position right big traction beam which are arranged at intervals, two sides of the two-position middle cover plate are respectively erected and fixed on the two-position left big traction beam and the two-position right big traction beam, two sides of the two-position left floor outside the pillow are respectively erected and fixed on the two-position left big traction beam and the left side beam, two sides of the two-position right floor outside the pillow are respectively erected and fixed on the two-position right big traction beam and the right side beam,
the two-position end floor is abutted against one end of the two-position middle cover plate, one end of the two-position pillow outer left floor and one end of the two-position pillow outer right floor, the other ends of the two-position middle cover plate, the two-position pillow outer left floor and the two-position pillow outer right floor are erected and fixed on the two-position pillow beam,
the two-position floor transition section bar is erected on the two-position sleeper beam, the other end of the sleeper inner floor is inserted on the two-position floor transition section bar,
the upper surfaces of the two-position buffer beam, the two-position large traction beam and the two-position sleeper beam are flush with the upper surface of the floor.
3. The underframe of a railway vehicle with a large-section traction and bolster buffering structure as claimed in claim 1, further comprising an energy absorbing device fixedly connected with the front-end beam,
the energy absorption device comprises a corrugated bottom plate and an end cross beam, two ends of the end cross beam are respectively connected with the front end beam through an energy absorption side beam which is a bent beam,
an energy-absorbing longitudinal beam is arranged between the end cross beam and the front end beam, and the corrugated bottom plate is laid on the end cross beam, the energy-absorbing longitudinal beam and the energy-absorbing side beam and is fixedly connected with the end cross beam, the energy-absorbing longitudinal beam and the energy-absorbing side beam.
4. The underframe of a railway vehicle with a large-section traction and bolster buffering structure as claimed in claim 1, wherein the one-position floor transition profile and the in-sleeper floor are in a plug-in structure and are welded and fixed.
5. The underframe of a railway vehicle with a large-section traction and bolster buffering structure as claimed in claim 1, wherein the primary sleeper beam and the primary floor transition profile are in a lap joint structure and are welded and fixed.
6. The underframe of a railway vehicle with a large-section traction and bolster buffering structure as claimed in claim 1, wherein the left side beam and the sleeper inner floor are welded and fixed by adopting an overlapping structure.
7. The underframe of a railway vehicle with a large-section traction and bolster buffering structure as claimed in claim 1, wherein the one-position end floor and the left side beam are in a lap joint structure and are welded and fixed.
8. The underframe of a railway vehicle with a large-section traction and bolster buffering structure as claimed in claim 1, wherein two sides of the single-position middle cover plate are respectively erected and fixed on the inner side of the single-position left large traction beam and the inner side of the single-position right large traction beam and welded by HV welding seams,
the upper surface of the one-position middle cover plate is flush with the upper surfaces of the one-position left big traction beam and the one-position right big traction beam,
the one-position sleeper outer left floor is erected and fixed on the one-position left big traction beam, the front side of the one-position sleeper outer left floor is welded by adopting HV welding seams, the back side of the one-position sleeper outer left floor is welded by adopting lap fillet welding seams,
and the right floor outside the one-position pillow is erected and fixed on the one-position right big traction beam, the front side of the one-position right big traction beam is welded by adopting an HV welding line, and the back side of the one-position right big traction beam is welded by adopting an overlap fillet welding line.
9. The underframe of a railway vehicle with a large-section traction and bolster buffering structure as claimed in claim 1, wherein the front end beam is welded to the left side beam and the right side beam by tailor welding with a bar-end-removed groove.
10. The railway vehicle underframe of claim 1, further comprising a frame seat, a bogie stop seat, a trailer hook and a roll bar seat riveted to the left side rail and the right side rail by blind rivets.
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| CN202110332946.8A CN112937623A (en) | 2021-03-29 | 2021-03-29 | Rail vehicle chassis with large-section traction and bolster buffering structure |
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| CN202110332946.8A CN112937623A (en) | 2021-03-29 | 2021-03-29 | Rail vehicle chassis with large-section traction and bolster buffering structure |
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| CN112937623A true CN112937623A (en) | 2021-06-11 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113291342A (en) * | 2021-07-12 | 2021-08-24 | 中车长春轨道客车股份有限公司 | Rail vehicle and chassis thereof |
| CN113371011A (en) * | 2021-07-30 | 2021-09-10 | 中车长春轨道客车股份有限公司 | Intercity EMUs aluminum alloy vehicle body structure |
| CN113602308A (en) * | 2021-08-20 | 2021-11-05 | 中车株洲电力机车有限公司 | Rail vehicle chassis |
| CN113649734A (en) * | 2021-08-24 | 2021-11-16 | 中车唐山机车车辆有限公司 | Underframe floor assembling and welding tool and underframe floor assembling and welding method thereof |
| CN114194240A (en) * | 2022-01-20 | 2022-03-18 | 河北京车轨道交通车辆装备有限公司 | Modular subway underframe and manufacturing method thereof |
| CN114312887A (en) * | 2022-01-05 | 2022-04-12 | 中车青岛四方机车车辆股份有限公司 | Vehicle body chassis and rail vehicle |
| CN114735042A (en) * | 2022-05-10 | 2022-07-12 | 北京轨道交通技术装备集团有限公司 | Rail vehicle chassis structure and front end floor thereof |
| CN117922624A (en) * | 2024-03-21 | 2024-04-26 | 成都中车长客轨道车辆有限公司 | Rail transit vehicle underframe structure and processing method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103832446A (en) * | 2014-03-26 | 2014-06-04 | 南车株洲电力机车有限公司 | Railway vehicle body chassis structure |
| CN104085417A (en) * | 2014-07-24 | 2014-10-08 | 南车南京浦镇车辆有限公司 | Railway vehicle outside-sleeper structure |
| CN204172921U (en) * | 2014-10-20 | 2015-02-25 | 南车株洲电力机车有限公司 | Vehicle body of railway vehicle floor Undercarriage structure |
| WO2015111185A1 (en) * | 2014-01-24 | 2015-07-30 | 株式会社日立製作所 | Rail vehicle structure |
| CN106696982A (en) * | 2016-12-20 | 2017-05-24 | 中车长春轨道客车股份有限公司 | Novel anti-climbing energy absorbing device |
| CN107499326A (en) * | 2017-08-31 | 2017-12-22 | 中车株洲电力机车有限公司 | Railcar and its Undercarriage structure |
| CN112026819A (en) * | 2020-09-10 | 2020-12-04 | 中车青岛四方机车车辆股份有限公司 | Internal combustion motor train unit |
| CN112078619A (en) * | 2020-09-24 | 2020-12-15 | 中车株洲电力机车有限公司 | Rail vehicle chassis structure and rail vehicle |
| CN112224227A (en) * | 2020-09-11 | 2021-01-15 | 中车长春轨道客车股份有限公司 | Equal-section B-shaped stainless steel vehicle body collision-resistant front end underframe structure |
| CN212473461U (en) * | 2020-06-11 | 2021-02-05 | 中车青岛四方机车车辆股份有限公司 | Rail vehicle tip chassis structure and rail vehicle |
-
2021
- 2021-03-29 CN CN202110332946.8A patent/CN112937623A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015111185A1 (en) * | 2014-01-24 | 2015-07-30 | 株式会社日立製作所 | Rail vehicle structure |
| CN103832446A (en) * | 2014-03-26 | 2014-06-04 | 南车株洲电力机车有限公司 | Railway vehicle body chassis structure |
| CN104085417A (en) * | 2014-07-24 | 2014-10-08 | 南车南京浦镇车辆有限公司 | Railway vehicle outside-sleeper structure |
| CN204172921U (en) * | 2014-10-20 | 2015-02-25 | 南车株洲电力机车有限公司 | Vehicle body of railway vehicle floor Undercarriage structure |
| CN106696982A (en) * | 2016-12-20 | 2017-05-24 | 中车长春轨道客车股份有限公司 | Novel anti-climbing energy absorbing device |
| CN107499326A (en) * | 2017-08-31 | 2017-12-22 | 中车株洲电力机车有限公司 | Railcar and its Undercarriage structure |
| CN212473461U (en) * | 2020-06-11 | 2021-02-05 | 中车青岛四方机车车辆股份有限公司 | Rail vehicle tip chassis structure and rail vehicle |
| CN112026819A (en) * | 2020-09-10 | 2020-12-04 | 中车青岛四方机车车辆股份有限公司 | Internal combustion motor train unit |
| CN112224227A (en) * | 2020-09-11 | 2021-01-15 | 中车长春轨道客车股份有限公司 | Equal-section B-shaped stainless steel vehicle body collision-resistant front end underframe structure |
| CN112078619A (en) * | 2020-09-24 | 2020-12-15 | 中车株洲电力机车有限公司 | Rail vehicle chassis structure and rail vehicle |
Non-Patent Citations (1)
| Title |
|---|
| 洪松涛等: "《简明焊工手册（机电工人技术丛书）》", 31 January 2015, 上海科学技术出版社 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113291342A (en) * | 2021-07-12 | 2021-08-24 | 中车长春轨道客车股份有限公司 | Rail vehicle and chassis thereof |
| CN113371011A (en) * | 2021-07-30 | 2021-09-10 | 中车长春轨道客车股份有限公司 | Intercity EMUs aluminum alloy vehicle body structure |
| CN113371011B (en) * | 2021-07-30 | 2024-03-22 | 中车长春轨道客车股份有限公司 | Inter-city motor train unit aluminum alloy vehicle body structure |
| CN113602308A (en) * | 2021-08-20 | 2021-11-05 | 中车株洲电力机车有限公司 | Rail vehicle chassis |
| CN113649734A (en) * | 2021-08-24 | 2021-11-16 | 中车唐山机车车辆有限公司 | Underframe floor assembling and welding tool and underframe floor assembling and welding method thereof |
| CN114312887A (en) * | 2022-01-05 | 2022-04-12 | 中车青岛四方机车车辆股份有限公司 | Vehicle body chassis and rail vehicle |
| CN114312887B (en) * | 2022-01-05 | 2023-08-04 | 中车青岛四方机车车辆股份有限公司 | Car body underframe and rail vehicle |
| CN114194240A (en) * | 2022-01-20 | 2022-03-18 | 河北京车轨道交通车辆装备有限公司 | Modular subway underframe and manufacturing method thereof |
| CN114735042A (en) * | 2022-05-10 | 2022-07-12 | 北京轨道交通技术装备集团有限公司 | Rail vehicle chassis structure and front end floor thereof |
| CN117922624A (en) * | 2024-03-21 | 2024-04-26 | 成都中车长客轨道车辆有限公司 | Rail transit vehicle underframe structure and processing method |
| CN117922624B (en) * | 2024-03-21 | 2024-06-11 | 成都中车长客轨道车辆有限公司 | Rail transit vehicle underframe structure and processing method |
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Application publication date: 20210611 |