CN104015747B - Freight wagon steering frame and middle crossed supporting device thereof - Google Patents

Abstract

The invention provides a freight wagon steering frame and a middle crossed supporting device thereof. The freight wagon steering frame can effectively improve strength of a pole body and reduce vibration of the pole body, operational reliability is high, positioning control ability on the steering frame is improved, and the freight wagon steering frame has better dynamical performance. The middle crossed supporting device comprises a first pole and a second pole which are arranged in a crossed way and also comprises a connecting piece, wherein the connecting piece is used for fixedly connecting the first pole with the second pole. The middle crossed supporting device is provided with the connecting piece, so that the first pole is fixedly connected with the second pole, and the first pole and the second pole can not move relatively when a vehicle moves, so that the positioning control ability of the middle crossed supporting device to the steering frame is improved, especially capacity resistant to snakelike deformation can be improved; meanwhile, stabilities of the first pole and the second pole are improved, vibration of the first pole and the second pole when the vehicle moves and abrasion of the pole body are reduced; and besides, strength of the pole body is also effectively improved, structure of the pole body is simplified, and weight of the pole body is reduced.

Description

A kind of railway goods train bogie and wherein cross-braced device

Technical field

The present invention relates to railway transportation technology field, the middle cross support dress of more particularly to a kind of railway goods train bogie Put.The invention still further relates to a kind of railway goods train bogie using above-mentioned middle cross-braced device.

Background technology

Bogie is the important component part of rail truck, the weight for bearing body it is ensured that vehicle along circuit run, Directly affect security and the stationarity of vehicle operation.

For improving the performance of bogie, intersect in generally installing additional on the basis of traditional three piece truck in prior art Support meanss, thus improving the snakelike unstability critical speed of bogie and the stability of lorry linear running, improve vehicle performance.

Refer to Fig. 1-3, Fig. 1 is a kind of top view of set-up mode of bogie in prior art；Fig. 2 is to turn shown in Fig. 1 A kind of top view of set-up mode of middle cross-braced device to frame；Fig. 3 is the side view of middle cross-braced device shown in Fig. 2.

Existing bogie is provided with middle cross-braced device 1 ', and middle cross-braced device 1 ' includes the first bar arranged in a crossed manner 11 ' and second bar 12 ', two bars are connected with the side frame 2 ' of homonymy with its two ends respectively；As shown in Figures 2 and 3, the first bar 11 ' Intersect with the second bar 12 ', and both crossover sites fit tightly or there is small gap.

Using the middle cross-braced device of said structure, in running, the first bar 11 ' and the second bar 12 ' are all for vehicle Can move in its bearing of trend, thus limited to the normotopia control ability of bogie；Additionally, in vehicle runs, the first bar 11 ' and Second bar 12 ', it also occur that vibration, affects the dynamic performance of vehicle；Meanwhile, in the relative motion of two bars, shaft can be sent out Raw contact, produces abrasion；Furthermore, because the length of shaft is longer, for improving shaft intensity, need larger shaft section, enter And increased the weight of middle cross-braced device.

Therefore, how to design a kind of middle cross-braced device of railway goods train bogie, to improve its dependability, excellent Change its performance, be the current technical issues that need to address of those skilled in the art.

Content of the invention

It is an object of the invention to provide a kind of middle cross-braced device of railway goods train bogie, shaft can be effectively improved Intensity, reduces shaft vibration, and its dependability is higher.

It is a further object of the present invention to provide a kind of railway goods train bogie with above-mentioned middle cross-braced device, it is just Position control ability is higher, has preferable dynamic performance.

For solving above-mentioned technical problem, the present invention provides a kind of middle cross-braced device of railway goods train bogie, including First bar arranged in a crossed manner and the second bar, also include being provided with connector, and described connector is by described first bar and described second bar It is connected.

The middle cross-braced device of the present invention is provided with connector, thus the first bar and the second bar are fixedly connected, it is to avoid car Both relative movements in motion process, such that it is able to the normotopia control ability to bogie for the cross-braced device in improving, especially It can improve the ability of anti-snakelike deformation；Meanwhile, the first bar and the second bar are fixedly connected, and can improve both stability, Reduce both vibrations during vehicle runs, in order to avoid the dynamic performance of impact vehicle；Furthermore, the first bar and the second bar are fixedly connected Afterwards, can effectively improve the intensity of shaft, and then simplify the structure of shaft, reduce its weight；Finally, connector by the first bar and Second bar can also avoid both shafts to wear away because of relative motion it is ensured that the use of middle cross-braced device can after being connected By property.Preferably, the cross part of described first bar and described second bar is additionally provided with cushion, and described cushion dottle pin is described Between one bar and the second bar.

Cushion can also be set between the first bar and the second bar, to buffer the first bar and the second vibration of bar, improve The dynamic performance of bogie；Meanwhile, the increase of cushion can avoid the first bar and the shaft of the second bar to contact, Jin Eryou Effect avoids the abrasion of shaft, improves intensity and the toughness of shaft.

Preferably, described connector includes the first side plate being arranged in the middle part of described first bar and is arranged on described second bar Second side plate at middle part, described first side plate and described second side plate are removably secured connection.

The middle part of the first bar and the second bar can arrange side plate, then both middle parts is connected, due to the first bar and The two ends of two bars are fixed by side frame, then the middle part of two bars can improve the intensity of shaft after side plate is fixing on the whole, The serviceability of cross-braced device in lifting.

Need further exist for illustrating, in prior art, limited by bolster central space structure, the first bar and the second bar Cannot realize connecting, in the application, side plate is set at the middle part of the first bar and the second bar, by the structure improvement to shaft, permissible Rationally utilize the small space of inner chamber in the middle part of bolster, thus realizing the first bar and the connection of the second bar, cross support dress in lifting The serviceability put.

Preferably, described first side plate is integrally formed with described first bar or welds connected；Described second side plate with described Second bar is integrally formed or welds connected, to improve the connection reliability of the first bar and the second bar, simplified processing process.

Preferably, described first side plate and described second side plate by described first bar and described second bar cross part to One end extends preset distance, and both head ends are connected, so that the first bar and the second bar are carried out with lateral confinement, improves bogie Anti- snakelike deformability.

Preferably, the both sides of described first bar are equipped with described first side plate, and the first side plate described in two is respectively facing described The two ends of the first bar extend；The both sides of described second bar are equipped with described second side plate, and described in two, the second side plate is respectively facing institute The two ends stating the second bar extend, and the head end of described first side plate and described second side plate that are in same one end is connected.

The both sides of the first bar and the second bar all can arrange side plate, formed in the position near both two ends to connect Point, improves degree of restraint to both, it is to avoid both relative motions are it is ensured that the dependability of middle cross-braced device.

Preferably, there is at least two tie points, each described tie point between described first side plate and described second side plate Spaced apart to butt by both head ends, to improve connection reliability, it is to avoid occur connecting weak ring.

Preferably, each described tie point is fixedly connected using bolt and nut, and described bolt and nut passes through a point solid welding after connecting Fixed；Or, described nut is stop nut, it is to avoid because Vehicular vibration affects connection reliability.

Preferably, described connector includes the first holder being detachably connected and the second holder, described first clamping The cross part of described first bar and described second bar is fixedly clamped by part and the second holder.

When positioning to the first bar and the second bar using holder, assembling process can be simplified, improve easy to use Property；Meanwhile, the reliability of clamping and positioning is higher.

The present invention also provides a kind of railway goods train bogie, including the middle cross-braced device described in any of the above-described.

Because the railway goods train bogie of the present invention has the middle cross-braced device described in any of the above-described, therefore above-mentioned Technique effect produced by middle cross-braced device described in one is all applied to the railway goods train bogie of the present invention, herein not Repeat again.

Brief description

Fig. 1 is a kind of top view of set-up mode of bogie in prior art；

Fig. 2 is a kind of top view of set-up mode of middle cross-braced device of bogie shown in Fig. 1；

Fig. 3 is the side view of middle cross-braced device shown in Fig. 2；

Fig. 4 is a kind of top view in specific embodiment for the bogie provided by the present invention；

Fig. 5 is the structural representation after bogie shown in Fig. 4 removes bolster；

Fig. 6 is a kind of top view in specific embodiment for the middle cross-braced device provided by the present invention；

Fig. 7 is the side structure schematic diagram of middle cross-braced device shown in Fig. 6；

Fig. 8 is a kind of top view of set-up mode of the first bar in middle cross-braced device shown in Fig. 6；

Fig. 9 is the close-up schematic view at the middle part of the first bar shown in Fig. 8；

Figure 10 is the side structure schematic diagram of the first bar shown in Fig. 8；

Figure 11 is the close-up schematic view at the middle part of the first bar shown in Figure 10；

Figure 12 is a kind of top view of set-up mode of cushion provided by the present invention.

In Fig. 1-3:

Cross-braced device, 11 ' first bars, 12 ' second bars in 1 '

In Fig. 4-12:

1 first bar, 2 second bars, 3 connectors, 31 first side plates, 32 second side plates, 4 cushions, 5 side frames, 6 Bolster, 7 wheels are right

Specific embodiment

The core of the present invention is to provide a kind of middle cross-braced device of railway goods train bogie, can effectively improve shaft Intensity, reduces shaft vibration, and its dependability is higher.

Another core of the present invention is to provide a kind of railway goods train bogie with above-mentioned middle cross-braced device, and it is just Position control ability is higher, has preferable dynamic performance.

In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description The present invention is described in further detail.

Refer to Fig. 4 and Fig. 5, Fig. 4 is a kind of top view in specific embodiment for the bogie provided by the present invention；Figure 5 is the structural representation after bogie shown in Fig. 4 removes bolster.

In a kind of specific embodiment, the railway goods train bogie (hereinafter referred to as bogie) of the present invention can pass through one Two or more wheels are formed dollies to 7 by individual bolster 6 and two side frames 5, are moved with relative orbit；Bolster 6 and side frame 5 phase Even, for controlling the motion of side frame 5, side frame 5 is connected to 7 with wheel, and the fortune to 7 by frictional force control wheel between the two Dynamic.

Also include middle cross-braced device, to improve the dynamic performance of vehicle；Can be by middle cross-braced device and side Frame 5 connects, and middle cross-braced device includes the first bar 1 arranged in a crossed manner and the second bar 2, the end formation connection end of two bars, To be connected with the side frame 5 being in both sides.

As shown in Figure 4 and Figure 5, the bogie of the present invention also includes middle cross-braced device, described middle cross-braced device Can be connected with side frame 5, to submit the diamond resistant rigidity of bogie to, reduce wheel to the serpentine locomotion between 7 and bogie, improve and turn To the snakelike unstability critical speed of frame, can also effectively ensure the normotopia state that bogie is in operation, improve bogie Runnability, reduces the abrasion between wheel track.

It should be noted that for ease of the structure showing cross-braced device of the present invention, bolster 6 is removed in Fig. 5, not It is understood that as, in the bogie of the present invention, cross-braced device can be not passed through bolster 6.

Please further refer to Fig. 6 and Fig. 7, Fig. 6 is middle cross-braced device provided by the present invention in a kind of specific embodiment party Top view in formula；Fig. 7 is the side structure schematic diagram of middle cross-braced device shown in Fig. 6.

The middle cross-braced device of the present invention includes the first bar 1 and the second bar 2, and the first bar 1 and the second bar 2 are arranged in a crossed manner, I.e. the first bar 1 intersects with the second bar 2 and forms the structure of similar x type；The middle cross-braced device of the present invention also includes connecting Part 3, connector 3 is used for connecting the first bar 1 and the second bar 2, so that the first bar 1 and the second bar 2 are relatively fixed, such as Fig. 6 and Fig. 7 Shown.

Middle cross-braced device due to the present invention is provided with connector 3, is capable of the first bar 1 and the fixation of the second bar 2 Connect, then the first bar 1 and the second bar 2 and then can improve steering with relative restraint to improve the normotopia control ability to bogie The dynamic performance of frame；After first bar 1 is fixedly connected with the second bar 2, both stability can also be improved, and then reduce vehicle The vibration of shaft in operation, not only can improve the restraining force to bogie, can also avoid because shaft vibration cause relative Friction, reduces shaft abrasion；Furthermore, after the first bar 1 is fixedly connected with the second bar 2, entirely middle cross-braced device can be improved Intensity, and then simplify structure, the weight of cross-braced device in reduction.

Incorporated by reference to Fig. 8-11, Fig. 8 is a kind of top view of set-up mode of the first bar in middle cross-braced device shown in Fig. 6； Fig. 9 is the close-up schematic view at the middle part of the first bar shown in Fig. 8；Figure 10 is the side structure schematic diagram of the first bar shown in Fig. 8； Figure 11 is the close-up schematic view at the middle part of the first bar shown in Figure 10.

More specifically, connector 3 can include the first side plate 31 and the second side plate 32, and the first side plate 31 is arranged on first The middle part of bar 1, the second side plate 32 is arranged on the middle part of the second bar 2, as illustrated in figs. 6-11；First side plate 31 and the second side plate 32 can Releasably it is fixedly connected, that is, both be fixedly connected is dismountable, can release both as needed is fixedly connected relation, makes Obtain the first bar 1 and the second bar 2 relative motion.

The structure of the first bar 1 and the second bar 2 can be same or like, Fig. 8-11 and with the first bar 1 be only hereinafter Example illustrates, but it will be understood by those skilled in the art that the second bar 2 can also be set using the structure of similar first bar 1 Put, as space is limited, below repeat no more.

The middle part of described first bar 1 refers to extend, to its two ends, the part that certain distance is formed from the midpoint of shaft, also It is to say, middle part is for two ends, not definitely refer to the middle of shaft.In the same manner, the middle part of the second bar 2 is also phase For its two ends.

Generally, in railway freight-car, the direction parallel to vehicle traffic direction is longitudinally, and the direction that vehicle runs is front, phase Answer, deviate from vehicle operation direction be after；In the plane parallel to orbital plane, the direction being transversely to the machine direction is horizontal, Transversely, see along the traffic direction of vehicle, the side being in left-hand side is left side, being in dexter side is right side；Vertically It is vertical in the direction of orbital plane, on vertical, under the direction of close orbital plane is, the direction away from orbital plane is upper.

During installation, the first bar 1 can be extended to the right afterwards by left front, the second bar 2 can from before the right side to left back extension, therefore first The end of bar 1 and the second bar 2 is in fore-and-aft direction, and the first side plate 31 and the second side plate 32 all can be by the first bars 1 and second The cross part of bar 2 extends towards one end, and that is, the first side plate 31 and the second side plate 32 all can extend in fore-and-aft direction.

Further, the first side plate 31 and the second side plate 32 can also the cross part of the first bar 1 and the second bar 2 be rising of extending Point, in other words, the first side plate 31 and the second side plate 32 can described cross part be root, forwards or rear extends pre- spacing From the end of extension constitutes head end, then the first side plate 31 is fixedly connected with its head end respectively with the second side plate 32, as shown in Figure 6.

Described preset distance is configured according to the length of the first bar 1 and the second bar 2, to ensure that the first side plate 31 is in The middle part of one bar 1, the second side plate 32 is in the middle part of the second bar 2.

It can be seen that, the first side plate 31 and the second side plate 32 can the cross part of the first bar 1 and the second bar 2 be root, forward end Or rear end extends preset distance, is then fixedly connected with head end；Because the first bar 1 and the second bar 2 are in the direction near two ends Less stable, therefore can fix, will pass through the first side plate 31 and the second side the head end of the first side plate 31 and the second side plate 32 Plate 32 constrains to the first bar 1 and the second bar 2, is the first bar 1 and the second bar 2 provides inside pulling force, it is to avoid both relative movements, Thus assisting the mechanical property improving bogie, enable in particular to improve the anti-water chestnut performance of bogie；Again due to the first side plate 31 He Second side plate 32 with described cross part as root, and to one end extend preset distance, therefore both tie point distance the first bars 1 or The end of the second bar 2 farther out, does not interfere with the first bar 1 and the normal use of the second bar 2.

Because the first side plate 31 and the second side plate 32 are using described cross part as root, for realizing both connections, both Bearing of trend should be consistent；Meanwhile, the root of the first side plate 31 and the second side plate 32 is described cross part, and both can be preferable Ground laminating, to achieve a fixed connection, it is to avoid both interfere and affect the arranged in a crossed manner of the first bar 1 and the second bar 2；Furthermore, The cross part of the first bar 1 and the second bar 2 needs guiding through bolster 6, when the first side plate 31 and the second side plate 32 are with described cross part as root During portion, considerable influence will not be produced to the size of described cross part, be easily installed.

It is contemplated that the first side plate 31 can be arranged on the optional position at the first bar 1 middle part, it is not limited to the first bar 1 and the The cross part of two bars 2；In the same manner, the second side plate 32 can also be arranged on the optional position at the second bar 2 middle part, as long as being capable of two Person connects.

Further, the both sides of the first bar 1 all can arrange the first side plate 31, and is in first side plate 31 of both sides respectively Extend towards the two ends of the first bar 1, that is, the first side plate 31 being in side extends towards front, is in the first side plate of opposite side 31 extend towards rear, as shown in Figure 8 and Figure 9；In the same manner, the both sides of the second bar 2 can also be respectively provided with the second side plate 32, and two institutes State the two ends extension that the second side plate 32 is respectively facing the second bar 2, then will be in the first side plate 31 and second side plate of same one end 32 are fixedly connected.Specifically, the first side plate 31 and the second side plate 32 can adopt said structure, and are fixedly connected with head end, such as Shown in Fig. 6.

When arranging two the first contrary side plates 31 of bearing of trend and the second side plate 32, the company of the first bar 1 and the second bar 2 Contact is in the two ends of described cross part, then the connection reliability of the first bar 1 and the second bar 2 is higher, can effectively improve to turn To the normotopia control ability of frame, and then improve the dynamic performance of bogie.

Further, at least two tie points can be set by between the first side plate 31 and the second side plate 32, and each described Tie point can be spaced apart to butt by the head end of the first side plate 31 and the second side plate 32, connects reliability to improve further Property, prevent the first bar 1 and the second bar 2 relative motion.

In detail, can be fixedly connected using bolt and nut between the first side plate 31 and the second side plate 32, can also adopt Screwed retaining ring, or fixed by spot welding after bolt and nut is connected, to prevent from occurring in vehicle operation connecting loosening, protect Card connection reliability.

It is contemplated that the fixed form of the first side plate 31 and the second side plate 32 is various, it is not limited to above-mentioned bolt and nut and connects, Can also connect, snap connection etc. other using pin and dismountable be fixedly connected mode.

It is further envisioned that the set location of the first side plate 31 and the second side plate 32 and version are various, as long as can be real Existing first bar 1 and the fixation of the second bar 2, are not limited to above-mentioned concrete structure.

Further, it is envisioned that the first side plate 31 can be made of one piece with the first bar 1, or the first side plate 31 is welded It is connected on the first bar 1；In the same manner, the second side plate 32 can also be integrally formed with the second bar 2, or the second side plate 32 is welded on On two bars 2.Obviously, when the first side plate 31 and the first bar 1, the second side plate 32 and the second bar 2 split setting, can also be using weldering Other fixed forms beyond connecing,

Further it is further envisioned that when the first side plate 31 is fixedly connected with the head end of the second side plate 32, both head ends Size can be more than butt, form enough areas in head end to be used for connecting, as shown in Figure 8 and Figure 9.

Additionally, first, second grade sequencer specifically described herein, only for distinguishing different parts, is not offered as certain special Fixed order is it is impossible to be interpreted as the restriction to structure or set location.

In another kind of specific embodiment, connector 3 can also be the part of similar claw, when the first bar 1 and second After bar 2 intersects, both cross sections form described cross part, now can be by connector 3 by the first bar 1 and the second bar 2 Cross part clamping fix, to realize being fixedly connected of the first bar 1 and the second bar 2；When disassembly is desired, only connector need to be taken off 3, you can release the connection of the first bar 1 and the second bar 2.

It will be understood by those skilled in the art that connector 3 can be even the structure such as strapping, spacer, its structure letter Single, easy to use.

In other specific embodiments, the connector 3 of the present invention can also include the first holder and the second holder, First holder and the second holder are detachably connected, after the first bar 1 and the second bar 2 intersect, by the first holder and second Holder connects, and then the cross part of the first bar 1 and the second bar 2 is fixedly clamped, to realize consolidating of the first bar 1 and the second bar 2 Fixed connection.

That is, the first holder and the second holder can up and down, left and right or connect in front and back, to form a folder Hold mouth, thus cross part is fixedly clamped, prevent the first bar 1 and the relative motion of the second bar 2；For example, the first holder and Two holders can be two pressing plates pressing up and down, after the first bar 1 and the second bar 2 intersect, will be fixed for described cross part compression Position；Or the first clamping element and the second clamping element can be the buckle being capable of clamping, after the first bar 1 and the second bar 2 intersect, the One holder and the second holder clamping, so that the folder that cross part locking positioning is formed in the first holder and the second holder Hold in mouth.

It can be seen that, the concrete form of connector 3 does not limit, every connector being fixedly connected the first bar 1 with the second bar 2 All may be constructed the connector of the present invention.

In addition, the position of connector 3 does not limit, can be the middle part of the first bar 1 and the second bar 2, or the position near two ends Put, preferably may be provided with the cross part of the first bar 1 and the second bar 2 as the center of circle, circle institute is drawn for radius with any smaller length The zone line being formed, to improve connection reliability, and then improves the serviceability of entirely middle cross-braced device.

Refer to Figure 12, Figure 12 is a kind of top view of set-up mode of cushion provided by the present invention.

On the basis of the above, the middle cross-braced device of the present invention can also include cushion 4, and cushion 4 is arranged on One bar 1 and the cross part of the second bar 2, and dottle pin is between the first bar 1 and the second bar 2, as shown in figures 7 and 12, to prevent One bar 1 and the shaft directly contact of the second bar 2, reduce the abrasion that shaft contact produces；Importantly, cushion 4 can rise To certain cushioning effect, reduce the vibration of shaft during vehicle runs, it is to avoid shaft wears away, in raising, cross-braced device is to turning To the normotopia control ability of frame, and then improve the dynamic performance of bogie.

Cushion 4 can be made using metal or nonmetallic materials, is specifically as follows vertical bar type pad or other shapes The pad of formula；Adopt two the first side plates 31 to two ends extension and two the second side plates 32 extending to two ends in connector 3 When, connecting hole can be set at the two ends of cushion 4, then by itself and the first side plate 31 of both sides and the connection of the second side plate 32 Point connects, so that cushion 4 is fixed between the first bar 1 and the second bar 2, as shown in Figure 7.Certainly, cushion 4 can also be adopted It is fixed in other ways between the first bar 1 and the second bar 2, or the clamping force only relying between the first bar 1 and the second bar 2 is real Now position.

Above railway goods train bogie provided by the present invention and wherein cross-braced device are described in detail.This Apply specific case in literary composition the principle of the present invention and embodiment are set forth, the explanation of above example is only intended to Help understand the core concept of the present invention.It should be pointed out that for those skilled in the art, without departing from this On the premise of inventive principle, the present invention can also be carried out with some improvement and modify, these improve and modification also falls into the present invention In scope of the claims.

Claims (8)

1. the middle cross-braced device of a kind of railway goods train bogie, including the first bar (1) arranged in a crossed manner and the second bar (2), It is characterized in that, also include connector (3), described first bar (1) and described second bar (2) are connected by described connector (3)；Institute State connector (3) to include being arranged on the first side plate (31) in the middle part of described first bar (1) and being arranged in the middle part of described second bar (2) The second side plate (32), described first side plate (31) and described second side plate (32) are removably secured connection；Described first side Plate (31) and described second side plate (32) are extended in advance to one end by the cross part of described first bar (1) and described second bar (2) Set a distance, and both head ends are connected.

2. as claimed in claim 1 middle cross-braced device it is characterised in that described first bar (1) and described second bar (2) Cross part be additionally provided with cushion (4), described cushion (4) dottle pin is between described first bar (1) and the second bar (2).

3. as claimed in claim 1 middle cross-braced device it is characterised in that described first side plate (31) and described first bar (1) it is integrally formed or weld connected；Described second side plate (32) is integrally formed with described second bar (2) or welds connected.

4. as claimed in claim 1 middle cross-braced device it is characterised in that the both sides of described first bar (1) are all provided with State the first side plate (31), the two ends that the first side plate (31) described in two is respectively facing described first bar (1) extend；Described second bar (2) both sides are equipped with described second side plate (32), and the second side plate (32) described in two is respectively facing the two ends of described second bar (2) Extend, the head end of described first side plate (31) and described second side plate (32) that are in same one end is connected.

5. as claimed in claim 4 middle cross-braced device it is characterised in that described first side plate (31) and described second side There are between plate (32) at least two tie points, each described tie point is spaced apart to butt by both head ends.

6. as claimed in claim 5 middle cross-braced device it is characterised in that each described tie point is fixed using bolt and nut Connect, described bolt and nut is fixed by spot welding after connecting；Or, described nut is stop nut.

7. as claimed in claim 1 or 2 middle cross-braced device it is characterised in that described connector (3) include detachably connect The first holder connecing and the second holder, described first holder and the second holder are by described first bar (1) and described The cross part of two bars (2) is fixedly clamped.

8. a kind of railway goods train bogie is it is characterised in that include the middle cross support described in any one of the claims 1-7 Device.