CN205971353U - Low floor railway side beam of framework and install bogie of this end beam for vehicle - Google Patents

Abstract

The utility model relates to a frame end beam for a low-floor rail vehicle and a bogie equipped with the end beam. The end beam is installed at the end of the frame side beam. The two ends of the two side beams are butt-welded with the ends of the corresponding two side beams. The frame of the utility model is optimized for the overall structure. By adopting the I-shaped end beam, the end beam can be installed in the middle of two independent wheels, which fully benefits the limited space between the wheels, and not only has a reasonable and compact frame structure. , light in weight, and greatly reduce the height of the floor surface of the car body, meeting the use requirements of 100% low-floor vehicles.

Description

Frame end beam for low-floor rail vehicle and bogie equipped with the end beam

technical field

The utility model relates to a rail vehicle bogie, in particular to a frame end beam structure for a low-floor rail vehicle and a bogie equipped with the end beam, which belongs to the technical field of rail vehicle manufacturing.

Background technique

Low-floor urban rail vehicles play an increasingly important role in many urban traffic because of their advantages such as flexibility, convenience, strong adaptability, short construction period, low unit comprehensive cost and operating cost, and low-floor urban rail vehicles Among them, the bogie is the most important structural component, and its structure and various parameters directly determine the stability of the vehicle and the comfort of the ride.

Due to the low floor of the existing 100% low-floor urban rail vehicles, the space under the vehicle is limited, which limits the design of the vehicle bogies. In addition, the existing 100% low-floor urban rail vehicle bogies generally have small curves and poor passing capacity , The floor surface is too high, it is difficult to get on and off the car, and the traction device is bulky. With the continuous progress of urban rail vehicles, the requirements for urban rail vehicles are getting higher and higher. Therefore, it is necessary to provide a low-floor hinge that can lower the floor surface to facilitate the setting of getting on and off, and has a simple and compact structure, strong curve passing ability, and light weight. rail vehicle bogies.

In the bogie, the driving motor, braking device, traction device, primary suspension device, secondary suspension device and other equipment need to be fixedly installed on the frame, so the overall structural strength of the frame plays a key role in the overall operating performance of the rail vehicle role.

Utility model content

The main purpose of the utility model is to solve the above-mentioned problems and deficiencies, and provide a frame end for low-floor rail vehicles that has a simple and compact structure, improves the overall structural strength and bearing capacity of the end beam, and can make full use of the space, which is beneficial to reduce the height of the car body floor surface. beam.

Another main purpose of the present utility model is to provide a bogie equipped with the above-mentioned end beam.

In order to achieve the above object, the technical solution of the utility model is:

A frame end beam for a low-floor rail vehicle, which is installed at the end of the frame side beam. The end beam is an I-shaped structure cast integrally. End butt weld connection.

Further, one end beam is respectively welded and fixed at the two ends of the side beam.

Further, there are thickened parts at the two ends inside the end beam, and the side wall at the thickened end of the end beam has an inwardly concave structure, and the top and bottom edges of the thickened end of the end beam correspond to the top plate of the side beam. It is butt-welded with the side beam bottom plate, and the side beam reinforcement plate between the side beam top plate and the side beam bottom plate is lengthened and extends into the inside of the concave structure at the thickened end of the end beam and is butt-welded with the side wall of the end beam.

Further, a transverse stopper opening is opened on the middle beam of the end beam, and two secondary spring mounting seats are arranged symmetrically on both sides of the transverse stopper opening, and each of the four corners of the end beam The set has a primary spring mount.

Further, the secondary spring mounting seat is a downwardly recessed cylindrical structure.

Further, an upward protruding protrusion is provided at the bottom of the secondary spring mounting seat.

Further, a lifting opening for installing a lifting rod is provided between the transverse stop opening and the secondary spring mounting seats on both sides.

Further, a vertical shock absorber installation seat is provided on the two ends outside the end beam, and a transverse vibration absorber installation seat is provided on the middle beam.

Further, a plurality of longitudinal and transverse ribs are arranged on the back of the end beam.

Another technical scheme of the utility model is:

A low-floor rail vehicle truck having a frame end beam as described above.

To sum up, compared with the prior art, a low-floor articulated rail vehicle bogie frame and bogie according to the present invention has the following advantages:

(1) The frame of the present utility model optimizes the design of the overall structure. By adopting the I-shaped end beam, the end beam can be installed in the middle of two independent wheels, which fully benefits the limited space between the wheels, and not only the frame structure It is reasonable and compact, light in weight, and greatly reduces the height of the floor surface of the car body, meeting the use requirements of 100% low-floor vehicles.

(2) The end beam of the utility model adopts castings, which can greatly reduce the amount of welding, improve the process performance and assembly efficiency of the frame, and greatly improve the strength, stiffness, fatigue resistance and bearing capacity of the overall structure of the frame, and meet the needs of high-speed rails. Vehicle safety requirements.

Description of drawings

Fig. 1 is the structural representation of bogie of the present utility model;

Fig. 2 is a schematic diagram of the framework structure of the utility model;

Fig. 3 is a schematic diagram of the rear structure of Fig. 2;

FIG. 4 is a plan view of the structure of FIG. 2 .

As shown in Figures 1 to 4, the slewing mechanism 1, frame 2, bolster 3, traction rod 4, wheel set 5, transverse shock absorber 6, vertical shock absorber 7, side beam 8, side beam longitudinal beam 8a , side beam beam 8b, end beam 9, installation beam 10, installation beam longitudinal beam 10a, installation beam beam 10b, center beam 11, side beam top plate 12, side beam bottom plate 13, side beam reinforcement plate 14, installation beam top plate 15, Install beam bottom plate 16, install beam reinforcement plate 17, open slot 18, traction rod mounting seat 19, traction rod mounting seat 20, brake stop seat 21, motor mounting seat 22, secondary spring mounting seat 23, primary spring mounting Seat 24, transverse shock absorber mounting seat 25, vertical shock absorber mounting seat 26, protrusion 27, transverse stopper opening 28, mounting hole 29, longitudinal stopper 30, lifting opening 31, rib plate 32, side cover Plate mounting seat 33, drain hole 34, drain hole 35, mounting hole 36, opening 37, fixing seat 38, U-shaped opening 39, bolt hole 40.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

As shown in Figure 1, a low-floor articulated rail vehicle bogie is installed on a low-floor articulated rail vehicle, and a bogie is installed below the junction of every two cars, and the two cars are respectively connected to the bogie by turning Agency 1 is connected.

The bogie consists of a frame 2, two bolsters 3, two sets of traction rods 4, two sets of wheels 5, four driving motors, two sets of magnetic track brakes, two sets of axle bridges, eight primary springs, four secondary The four driving motors independently drive the four wheels, and a set of slewing mechanism 1 is installed on the two bolsters 3, and the two bolsters 3 are respectively installed in the middle of the two sets of wheels 5, and each set of traction rods The two ends of 4 are respectively fixedly connected with the bolster 3 and the frame 2, and a transverse shock absorber 6 and a vertical shock absorber 7 are installed between the outside of each group of bolster 3 and the frame 2, and a series of springs are installed on the axle bridge Between the frame 2, the secondary spring is installed between the frame 2 and the bolster 3.

In this embodiment, the bogie is connected to the car bodies of the two adjacent carriages through the slewing mechanism 1 through two bolsters 3, and each bolster 3 is directly connected to the central beam of the frame 2 through a set of traction rods 4. 11 connection to achieve traction and braking, not only can better realize the transmission of traction and braking force when the vehicle is running, carry vertical, lateral and longitudinal loads, but also greatly improve the vehicle's ability to pass through small curves, and at the same time reduce vehicle formation The configuration quantity of middle bogie 1 saves vehicle manufacturing, maintenance cost. The two bolsters 3 are respectively connected to the central beam 11 of the frame 2 through a set of traction rods 4, so that the two bolsters 3 and the two sets of traction rods 4 do not affect each other, and one bolster 3 does not affect each other when it moves longitudinally. to the longitudinal movement of another bolster 3, and the vibration shock of one compartment will not be transmitted to the other compartment without affecting each other, realizing the decoupling between two adjacent car bodies, greatly improving the ride comfort and operation reliability.

As shown in FIGS. 2 to 4 , the frame 2 provided by the present invention includes two side beams 8 , two end beams 9 , two installation beams 10 and a central beam 11 .

Wherein, the two side beams 8 have the same structure and are arranged symmetrically with respect to the longitudinal centerline of the vehicle body (referring to the longitudinal direction of the vehicle body). The two side beams 8 are π-shaped structures composed of a side beam longitudinal beam 8 a and two side beam cross beams 8 b, so as to improve the overall structural strength and bearing capacity of the side beam 8 . The side beam longitudinal beam 8a is a straight structure, the two side beam beams 8b are parallel to each other and perpendicular to the side beam longitudinal beam 8a, and the two side beam beams 8b are arranged in the lateral direction of the vehicle body of the side beam longitudinal beam 8a (referring to the width direction of the vehicle body). ) on the outer side, a side beam longitudinal beam 8a and two side beam beams 8b are integrally on a horizontal plane, in order to reduce the height of the vehicle body floor surface.

The side beam 8 adopts a box-shaped structure, which is spliced and welded by the side beam top plate 12, the side beam bottom plate 13 and a plurality of side beam reinforcement plates 14, and the side beam top plate 12 and the side beam bottom plate 13 are integrated π-shaped structural steel plates The side sill ribs 14 are also made of steel plates, which are vertically welded between the side sill top plate 12 and the side sill bottom plate 13 to form a box-shaped structure. The position of the edge is to improve the structural strength of the side beam 8 and minimize the generation of welding internal stress.

On the sides of the two side beam beams 8b, respectively fix a brake stop seat 21 of a magnetic rail brake, the brake stop seat 21 is a square steel plate, welded and fixed on the side beam beam 8b. On the back side of the brake stop seat 21 protrudes a lap platform (not shown), the side beam top plate 12 and the side beam bottom plate 13 at the side beam cross beam 8b place protrude a fixing seat 38 outwards here, The upper and lower fixing bases 38 are respectively overlapped on the upper and lower surfaces of the overlapping platform for welding connection.

A mounting beam 10 is fixedly installed on the lateral outer side of the vehicle body of each side beam 8. The mounting beam 10 can adopt a straight structure. In this embodiment, the mounting beam 10 preferably adopts a π-shaped structure. The beam 10 also consists of a mounting beam longitudinal beam 10a and two mounting beam beams 10b, the two mounting beam beams 10b are parallel to each other and perpendicular to the mounting beam longitudinal beam 10a, and the two mounting beam beams 10b are shorter in length and arranged The inner side of the beam 10 a in the vehicle transverse direction (that is, the side facing the side member 8 ).

The installation beam 10 adopts a box-shaped structure, which is spliced and welded by the installation beam top plate 15, the installation beam bottom plate 16 and a plurality of installation beam reinforcement plates 17, and the installation beam top plate 15 and the installation beam bottom plate 16 are all integrated π-shaped structural steel plates , the installation beam reinforcement plate 17 also adopts the steel plate, and the vertical welding is enclosed between the installation beam top plate 15 and the installation beam bottom plate 16 to form a box-shaped structure. The welding position of the installation beam reinforcement plate 17 is staggered from the position of the side edge of the installation beam top plate 15 and the installation beam bottom plate 16, so as to improve the structural strength of the installation beam 10 and minimize the generation of welding internal stress.

The two side beams 8b on the side beam 8 are butt-welded with the two installation beams 10b on the corresponding installation beam 10, and the side beam 8 and the installation beam 10 are butt-welded to form a II-shaped structure with a square opening 37, This structure can not only ensure the overall structural strength and bearing capacity of the frame 2, but also reduce the overall weight of the frame 2.

At the butt joint between the side beam beam 8b and the installation beam beam 10b, the installation beam rib 17 at the end of the installation beam beam 10b is extended outward by a length, and the side beam rib 14 at the end of the side beam beam 8b is shortened by a length inward. The extended part of the installation beam reinforcement plate 17 extends into the inside of the side beam beam 8b, the ends of the installation beam reinforcement plate 17 and the side beam reinforcement plate 14 are butt welded, the installation beam top plate 15 and the side beam top plate 12 are butt welded, and the installation beam bottom plate 16 and the side sill bottom plate 13 butt welded, the butt joint weld of the installation beam top plate 15 and the side sill top plate 12 and the butt weld seam of the installation beam bottom plate 16 and the side sill bottom plate 13 and the butt joint of the side sill rib 14 and the installation beam rib 17 The welding seams are staggered from each other to avoid the stress concentration of the welding seams and further improve the overall structural strength of the frame 2 .

The main body of the mounting beam 10 and the side beam 8 are integrally on a horizontal plane, and the whole is a flat structure to reduce the height of the floor surface of the vehicle body. A motor mounting base 22 is respectively arranged at the two ends of the mounting beam longitudinal beam 10a. , in order to ensure that the axis of the drive motor and the axis of the wheel set 5 are on a straight line, in this embodiment, both ends of the mounting beam longitudinal beam 10a are tilted upwards, forming an upwardly curved arc structure at the ends , the drive motor is directly fixed on the motor mount 22 by bolts, so that its axis and the axis of the wheel pair 5 can be in a straight line, and the installation and disassembly are very simple and convenient.

The central crossbeam 11 is a straight structure, integrally cast by cast steel, the two ends of the central crossbeam 11 are welded and fixed on the side beam ribs 14 of the side beams 8 on both sides, and the central crossbeam 11 and the side beams 8 are on the same horizontal plane. At the position of welding the central cross beam 11, the side beam longitudinal beam 8a inwardly recesses a U-shaped opening 39, and the end of the central cross beam 11 has a widened part, and the widened end is inserted into the U-shaped opening 39 for welding. In this embodiment, the side wall of the widened end of the central crossbeam 11 has an inwardly concave structure, and the top edge of the widened end of the central crossbeam 11 is butt-welded with the side beam top plate 12 at the U-shaped opening 39. The central crossbeam 11 The bottom edge of the widened end is butt-welded with the side beam bottom plate 13 at the U-shaped opening 39, and the side beam ribs 13 on both sides of the U-shaped opening 39 are lengthened and extended to the inside of the concave structure of the central beam 11 and the central beam The side wall of 11 is butt welded and connected, so that the butt welds of the central beam 11 and the side beam top plate 12 and the side beam bottom plate 13 and the butt welds of the central beam 11 and the side beam reinforcement plate 14 are staggered from each other, which can not only improve the center beam 11 The structural strength of the center beam 11 can be improved, the load-carrying capacity can be improved, and the welding stress concentration at the weld seam can be effectively avoided, so as to further improve the structural strength of the central beam 11.

The central beam 11 is provided with elongated opening slots 18 extending transversely along the vehicle body, and one opening slot 18 is respectively provided on the upper surface and the lower surface of the central beam 11 . As shown in Figure 1, there are bolt holes 40 on the side walls of both sides of the upper and lower open slots 18, which are used to fix and install the traction rod mounting seat 19, and the sides of the two bolsters 3 are also provided with traction The pull rod mounting base 20 and the two ends of the traction rod 4 are respectively fixed on the corresponding traction rod mounting base 19 and the traction rod mounting base 20 . Two traction rods 4 are respectively installed on both sides of the central crossbeam 11, and the two traction rods 4 are arranged parallel to each other. Therefore, there is no need to install another anti-roll torsion bar mechanism, which not only makes the vehicle run more smoothly, but also makes the structure of the frame 2 simple and compact, reducing the weight of the frame 2.

There is a strip-shaped groove at the bottom of the opening groove 18 of the central beam 11, and at least two drainage holes 34 are arranged on the groove. The rainwater in the crossbeam 11 opening groove 18 is got rid of.

The two end beams 9 are symmetrically arranged on both sides of the central beam 11, and the two end beams 9 are installed in the middle of the two sets of wheels 5, which not only makes full use of the limited space between the independent wheels, but also helps to reduce the load on the floor surface of the car body. high. In this embodiment, the end beam 9 is an I-shaped structure, which is integrally cast to ensure the structural strength of the end beam 9 and reduce the amount of welding.

The two ends of the inner side of the end beam 9 (that is, the inner ends of the two side beams of the end beam 9 arranged longitudinally along the vehicle body) are butt-welded with the ends of the two side beam longitudinal beams 8a, and the end beam 9 The end that abuts with the side sill longitudinal beam 8a has a thickened portion to match the size of the end of the side sill longitudinal beam 8a, thereby increasing the welding area there, and further improving the structural strength of the connection. In this embodiment, the side wall at the thickened end of the end beam 9 has an inwardly concave structure, the top edge of the thickened end of the end beam 9 is butt-welded with the side beam roof 12 at the end, and the end beam 9 is thickened The bottom edge of the end part is butt-welded with the side beam bottom plate 13 at the end part, and the side beam reinforcement plate 13 butt-welded with the side wall of the central cross beam 11 is extended toward the end beam 9 at the same time, and the extended part extends into the end beam 9 The inside of the concave structure at the thickened end is butt-welded with the side wall of the end beam 9, so that the butt weld between the end beam 9 and the side beam top plate 12 and the side beam bottom plate 13 and the connection between the end beam 9 and the side beam reinforcement plate 14 The butt welds are staggered from each other, which can improve the structural strength of the joint, effectively avoid welding stress concentration at the weld, greatly improve the structural strength of the end beam 9, and increase its bearing capacity.

The back of the end beam 9 has a plurality of transverse and longitudinal ribs 32, and the end beam 9 is also provided with a secondary spring mounting seat 23, a primary spring mounting seat 24, a transverse shock absorber mounting seat 25 and a vertical shock absorber. Mount 26. Rib plate 32, secondary spring mounting seat 23, primary spring mounting seat 24, lateral shock absorber mounting seat 25, vertical shock absorber mounting seat 26 and end beam 9 are integrally cast to improve processing technology and frame 2 The assembly efficiency is improved, and it is also beneficial to improve the overall structural strength and bearing capacity of the end beam 9.

In this embodiment, two secondary spring mounting seats 23 are arranged on each end beam 9, and the two secondary spring mounting seats 23 are arranged symmetrically around the longitudinal centerline of the vehicle body. The secondary spring mounting seat 23 adopts a sunken structure, which is a downwardly concave cylindrical structure. The secondary spring is installed in the secondary spring mounting seat 23, and the top of the secondary spring is installed on the lower surface of the bolster 3. in the mounting seat (not shown in the figure). The secondary spring mounting seat 23 adopts a sunken structure to provide a reliable guarantee for reducing the height of the floor surface of the car body.

There is an upward protrusion 27 at the center of the secondary spring mounting seat 23, which is integrally cast with the end beam 9, and a downwardly extending vertical stop is provided at the center of the secondary spring (not shown in the figure). Shown), the projection 27 stretches into the inside of the secondary spring, and is arranged opposite to the vertical stop, and there is a vertical stop gap between the bottom of the vertical stop and the top of the projection 27. When the vehicle is running normally, there is no contact between the bottom of the vertical stop and the top of the protrusion 27. Only when the load is large, when the secondary spring is compressed, the bottom of the vertical stop and the protrusion 27 The top is in contact, and the vertical stop is further compressed. Since the stiffness of the secondary steel round spring is linear, the stiffness of the vertical stop of the rubber material is nonlinear. When the load is large, the vertical stop and the protrusion 27 is in contact with and compressed, which not only acts as a stopper, but also acts as a variable stiffness, which is beneficial to improving the dynamic performance of the vehicle.

A plurality of drainage holes 35 are also provided at the bottom of the secondary spring mounting seat 23 for draining rainwater accumulated in the secondary spring mounting seat 23 .

There is a transverse stop opening 28 at the center of the end beam 9, and a protruding part (not shown in the figure) is provided below the bolster 3, and the protruding part extends into the transverse stop opening 28, and the transverse stop opening 28 There are mounting holes 29 for installing lateral stoppers on both ribs 32 on the lateral sides of the vehicle body, and the lateral stoppers (not shown) are fixed on the end beam 9 by bolts. Longitudinal stops 30 are arranged on the two ribs 32 of the car body longitudinally of the transverse stop opening 28, and the longitudinal stops 30 play the role of longitudinal bearing. When the traction rod 4 fails, the longitudinal stops 30 and the protruding Partial cooperation can still drive the vehicle to run.

There is a lifting opening 31 symmetrically on both sides of the transverse stopper opening 28, and a lifting rod (not shown in the figure) is installed in the lifting opening 31. The top of the lifting rod is fixedly connected with the bolster 3, and the lifting rod The bottom of the bottom extends to the bottom of the lifting opening 31. The lifting rods can not only limit the maximum vertical vibration distance of the car body, but also play the role of overall lifting of the bogie. The two lifting rods can maintain balance.

As shown in Figure 3, a cavity is formed between the ribs 32 on the back of the end beam 9 on both sides of the transverse stop opening 28 and the secondary spring mounting seat 23, and the bottom of the lifting rod is installed in the cavity. It is not only convenient for the installation of the horizontal stopper and the lifting boom, but also convenient for daily maintenance, and there is no need to set up additional structures such as horizontal stopper mounts and vertical stopper mounts, which simplifies the structure of the frame 2 to a certain extent and also The weight of frame 2 is reduced.

Four primary spring mounts 24 are arranged on each end beam 9, and the four primary spring mounts 24 are located at the four corners of the end beam 9. On the primary spring mounts 24, there is a series of spring mounts. Hole 36, the bottom of a series of springs is fixed on the mounting seat of axle bridge.

In this embodiment, one transverse shock absorber mounting seat 25 and two vertical shock absorber mounting seats 26 are arranged on each end beam 9, and the transverse shock absorber mounting seat 25 is arranged on the outer side of the middle beam of the end beam 9 On the wall, it is as large as an inverted L-shaped structure protruding outwards, and a mounting hole (not shown in the figure) for fixing the lateral shock absorber 6 is opened on the lateral shock absorber mounting seat 25 . The vertical shock absorber mounting seat 26 is arranged on the two outer ends of the end beam 9, and the vertical shock absorber mounting seat 26 protrudes toward the longitudinal centerline of the vehicle body, and is also an inverted L-shaped structure. The shock absorber mount 26 is provided with a mounting hole (not shown) for fixing the vertical shock absorber 7 . The other ends of the transverse shock absorber 6 and the vertical shock absorber 7 are fixed on the side wall of the bolster 3 .

Two side cover mounting seats 33 are fixed on the outer side of the installation beam longitudinal beam 10a, and a long strip side cover is installed on the side of the bogie, which is used to cover the inner bogie and side cover. It is fixed on the side cover mounting seat 33 by bolts.

Two side beams 8, two end beams 9, two installation beams 10 and a central beam 11 in the utility model are basically in the same plane after welding, and the frame 2 is a flat structure as a whole, and adopts I-shaped end beams 9, π-shaped side beam 8 and the central beam 11 of inline, I-shaped end beam 9 is installed in the middle of two wheels of wheelset 5, and π-shaped side beam 8 is installed between the front and rear two wheels of same side. Through the optimized design of the overall structure of the frame 2, not only the structure of the frame 2 is reasonable and compact, and the weight is light, but also the limited space between the independent wheels is fully utilized, the height of the floor surface of the car body is greatly reduced, which is convenient for getting on and off the car, and meets the requirements 100% required for use in low-floor vehicles.

In the utility model, the side beam 8 and the installation beam 10 adopt a steel plate splicing and welding structure, the end beam 9 and the central beam 11 adopt an integrally cast casting, and the entire frame 2 adopts a combined welding structure of a steel plate and a casting, which greatly reduces The amount of welding improves the process performance and assembly efficiency of the frame 2. Moreover, all the positions of the welding connections are placed on the straight line sections, and the welding seams at the connections also adopt a structure that is staggered from each other, which effectively avoids the concentration of welding stress and makes the structure The internal stress of welding is reduced to the minimum, and the overall structural strength, stiffness, fatigue resistance and bearing capacity of frame 2 are greatly improved, meeting the safe operation requirements of high-speed rail vehicles.

As mentioned above, a similar technical solution can be derived in combination with the content of the solution given in the accompanying drawings. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model without departing from the content of the technical solution of the utility model still belong to the scope of the technical solution of the utility model.

Claims (10)

1. a kind of low-floor rail vehicle truck end sill, be arranged on the end of truck side sill it is characterised in that：Described end carriage is The I-shape construction of integrally casting, the end butt welding of two inside described end carriage end and corresponding two curb girders is in succession Connect.

2. a kind of low-floor rail vehicle truck end sill according to claim 1 it is characterised in that：In described curb girder Two ends are respectively welded fixes an end carriage.

3. a kind of low-floor rail vehicle truck end sill according to claim 1 and 2 it is characterised in that：At described end Two ends inside beam have the part of thickening, and the end sidewalls thickening in end carriage have the structure concaving, and end carriage adds The top margin of thick end and base correspondence are connected with curb girder top board and curb girder base plate butt welding, between curb girder top board and curb girder base plate The curb girder gusset lengthening side wall butt welding of the inside of concave inward structure and end carriage that stretches to end carriage thickened end be connected.

4. a kind of low-floor rail vehicle truck end sill according to claim 1 and 2 it is characterised in that：At described end Horizontal backstop opening is had on the intermediate beam of beam, is symmetrically arranged with two secondary spring peaces in the both sides of described horizontal backstop opening Dress seat, is each provided with a primary spring mounting seat on four angles of described end carriage.

5. a kind of low-floor rail vehicle truck end sill according to claim 4 it is characterised in that：Described secondary spring Mounting seat is the columnar structured of concave downward.

6. a kind of low-floor rail vehicle truck end sill according to claim 5 it is characterised in that：It is bullet described two The bottom of spring mounting seat is provided with a projection protruding upward.

7. a kind of low-floor rail vehicle truck end sill according to claim 4 it is characterised in that：Laterally stop described Stop the lifting opening being provided between mouth and the secondary spring mounting seat of both sides for installing lifting bar.

8. a kind of low-floor rail vehicle truck end sill according to claim 1 and 2 it is characterised in that：At described end Two ends outside beam are each provided with a vertical damper mounting seat, are provided with a lateral damper peace on intermediate beam Dress seat.

9. a kind of low-floor rail vehicle truck end sill according to claim 1 and 2 it is characterised in that：At described end The back side of beam is provided with the gusset of multiple vertical and horizontal.

10. a kind of low-floor articulated track vehicle bogie it is characterised in that：Have as described in any one of claim 1-9 Bogie frame.