CN111186455B

CN111186455B - Protection plate subassembly and rail vehicle under car

Info

Publication number: CN111186455B
Application number: CN202010065331.9A
Authority: CN
Inventors: 李现远; 田洪雷; 田帅; 李树海; 王利
Original assignee: CRRC Qingdao Sifang Co Ltd
Current assignee: CRRC Qingdao Sifang Co Ltd
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2021-02-23
Anticipated expiration: 2040-01-20
Also published as: CN111186455A

Abstract

The invention discloses an under-vehicle protection plate assembly and a railway vehicle, wherein the under-vehicle protection plate assembly comprises a plurality of protection plates arranged in a protection area below a vehicle body underframe, the protection area comprises a first protection area and a second protection area which are positioned at the outer side of a sleeper beam and distributed left and right, and a third protection area and a fourth protection area which are positioned at the inner side of the sleeper beam and distributed left and right; at least two protection plates are arranged in the first protection area and the second protection area respectively, and at least three protection plates are arranged in the third protection area and the fourth protection area respectively; the periphery of each protection plate is provided with connecting holes at positions close to the edges, and the edges are provided with reinforcing rib protrusions. This fender subassembly has simplified the guard plate structure under the car, has reduced the guard plate kind, can carry out the modularized design to improve the suitability of guard plate, under the prerequisite that satisfies the rigidity requirement, alleviateed the guard plate dead weight, through improving and unified mounting means, can show improvement production efficiency.

Description

Protection plate subassembly and rail vehicle under car

Technical Field

The invention relates to the technical field of railway vehicles, in particular to an under-vehicle protection plate component of a railway vehicle. The invention also relates to a railway vehicle provided with the under-vehicle protection plate component.

Background

The bogie of the rail vehicle such as a high-speed rail, a motor train unit and the like is arranged below the vehicle body underframe, and an equipment cabin is also arranged below the vehicle body underframe so as to protect the equipment under the vehicle such as a waste discharge unit, a traction converter, an air conditioner inverter, a brake air cylinder, a storage battery box, a toilet and the like in the equipment cabin.

If the sleeper beam of the bogie is used as a boundary, the side of the sleeper beam close to the end part of the vehicle body is the outer side, and the side far away from the end part of the vehicle body is the inner side, and pipelines, circuits and the like of equipment under the vehicle body need to be arranged in the area below the underframe of the vehicle body and above the bogie to realize interconnection and intercommunication from the outer side to the inner side or from the inner side to the outer side. To the region that is not taken up by the bogie, can directly protect the equipment under the car through equipment cabin bottom plate, to the region that is taken up by the bogie, because can't set up equipment cabin bottom plate, in order to protect the outside and the inboard region of sleeper beam, need set up the guard plate here, the guard plate is located the bogie top, keeps suitable interval with the automobile body chassis simultaneously, forms intermediate layer space between the lower plane with the automobile body floor usually to arrange brake pipe, cable etc. under the car in the intermediate layer.

Traditional guard plate, because of parts such as dodging brake pipe way and cable under the car need adapt to the change of automobile body chassis height simultaneously, and remain sufficient safe distance with the bogie of below, various limiting factor have caused the guard plate form difference of each department great, lead to the guard plate form too much, and the mounting means is also different, has caused certain difficulty for the manufacturing and the installation of guard plate.

In addition, in order to ensure that the rolled sand and stone can be effectively prevented from impacting and the rain and snow can be prevented from invading when the vehicle runs, the protective plate is generally made of a 304 stainless steel plate with the thickness of about 2mm, the thickness is large, the excessively thick protective plate is not only not beneficial to realizing the light weight design, but also has high cost, is not easy to install and is easy to generate vibration noise.

Disclosure of Invention

The invention aims to provide an under-vehicle protection plate assembly. This guard plate subassembly has simplified the guard plate structure under car, has reduced the guard plate kind, can carry out the modularized design to improve the suitability of guard plate, through lightweight design, under the prerequisite that satisfies the rigidity requirement, alleviateed the guard plate dead weight, through improving and unified mounting means, can show improvement production efficiency.

Another object of the present invention is to provide a railway vehicle provided with the under-vehicle fender assembly.

In order to achieve the purpose, the invention provides an under-vehicle protection plate assembly, which comprises a plurality of protection plates arranged in a protection area below a vehicle body underframe, wherein a safety distance is reserved between each protection plate and a bogie below the protection plate, and an accommodating space is formed between each protection plate and the vehicle body underframe; at least two protection plates are arranged in the first protection area and the second protection area respectively, and at least three protection plates are arranged in the third protection area and the fourth protection area respectively; connecting holes distributed at intervals are formed in the periphery of each protection plate at positions close to the edges, and reinforcing rib protrusions formed after downward bending are arranged on the edges; the vehicle body chassis is provided with replaceable screw seats corresponding to the connecting holes, and the protection plate is connected with the replaceable screw seats through bolts arranged in the connecting holes.

Preferably, the protection plates in the first protection area and the second protection area are arranged in a bilateral symmetry mode, and the protection plates in the third protection area and the fourth protection area are arranged in a bilateral symmetry mode.

Preferably, a first protection plate and a second protection plate which are distributed bilaterally and symmetrically are arranged in the first protection area and the second protection area, the first protection plate and the second protection plate are substantially rectangular, the first protection plate is connected with the sleeper beam, the traction beam and the vehicle body floor, the second protection plate is connected with the traction beam, the boundary beam and the vehicle body floor, the first protection plate is located between the second protection plate and the sleeper beam, and the width of the second protection plate is larger than that of the first protection plate.

Preferably, a third protection plate, a fourth protection plate and a fifth protection plate which are symmetrically distributed at left and right are arranged in the third protection area and the fourth protection area, the third protection plate, the fourth protection plate and the fifth protection plate are substantially rectangular, the third protection plate is connected with the sleeper beam, the longitudinal beam and the vehicle body floor, the fourth protection plate is connected with the vehicle body floor and the side beam, the fifth protection plate is connected with the longitudinal beam and the vehicle body floor, the third protection plate is located between the fourth protection plate, the fifth protection plate and the sleeper beam, and the fourth protection plate is located on the outer side of the fifth protection plate.

Preferably, the overall width of the fourth protection plate and the fifth protection plate is greater than that of the third protection plate, the right-angle part of the fourth protection plate, which is adjacent to the third protection plate, is designed into a bevel edge shape, and a rectangular concave part is arranged on the bevel edge.

Preferably, the reinforcing rib protrusions are bent edges with the height of 15 mm-20 mm, wherein the bending angle between the reinforcing rib protrusions close to the edge beam and the surface of the protection plate is larger than the bending angle between the other reinforcing rib protrusions and the surface of the protection plate.

Preferably, the reinforcing rib bulges close to the side beams form bending angles of 115-155 degrees with the guard plate, and the other reinforcing rib bulges form bending angles of 70-110 degrees with the guard plate.

Preferably, the right-angle parts at the two raised ends of the reinforcing ribs are designed into a bevel edge shape, and an arc-shaped concave part positioned on the protection plate body is arranged between the two adjacent raised ends of the reinforcing ribs.

Preferably, the protection plate connected with the sleeper beam is provided with a first plate body and a second plate body which are parallel to each other, and the protection plate is connected with the sleeper beam through the first plate body; the second plate body is higher than and is longer than the first plate body, between the two through the slant plate body with reverse first bend angle and the second bend angle transitional coupling.

Preferably, the guard plate is formed with "U" shape open slot towards the outside respectively at the both ends of first bent angle and the second bent angle, is located "U" shape open slot both sides be equipped with the inside lining backing plate between the strengthening rib arch, the inside lining backing plate is the perpendicular to be the form of bending on the direction of guard plate face, its both ends respectively with correspond the strengthening rib arch is riveted mutually.

Preferably, at least one of the protection plates is provided with a material cutting area which is concave inwards at the edge position of the plate body, an opening groove which is enlarged inwards is formed at the corner cutting position of the material cutting area, a lining base plate is arranged between the reinforcing rib protrusions at the two sides of the opening groove, the lining base plate is bent at the angle consistent with the angle cutting position, and the two ends of the lining base plate are respectively riveted with the corresponding reinforcing rib protrusions.

Preferably, at least one of the protection plates is provided with a connecting hole on the plate body, the lower surface of the floor of the vehicle body chassis is provided with a replaceable screw seat avoiding pipelines or lines under the vehicle, and the connecting hole on the plate body is connected with the corresponding replaceable screw seat through a bolt.

Preferably, the replaceable screw seat is welded on a sleeper beam, a boundary beam, a traction beam, a longitudinal beam and an underfloor plane of the car body underframe.

Preferably, a rubber gasket is arranged between the protection plate and the replaceable screw seat, and a flat gasket and an elastic gasket are arranged between the bolt and the protection plate.

Preferably, the protection plate is a stainless steel plate integrally formed by punching, and the thickness of the protection plate is 1.4-1.6 mm.

In order to achieve the other purpose, the invention provides a railway vehicle, which comprises a vehicle body and a bogie arranged below the vehicle body, wherein a protective structure is arranged on an underframe of the vehicle body in a bogie area, and the protective structure comprises the under-vehicle protective plate component.

The invention provides an under-vehicle protection plate assembly, which takes a sleeper beam as a boundary, divides the outer side of the sleeper beam into a first protection area and a second protection area which are distributed left and right, divides the inner side of the sleeper beam into a third protection area and a fourth protection area which are distributed left and right, wherein at least two protection plates are respectively arranged in the first protection area and the second protection area, at least three protection plates are respectively arranged in the third protection area and the fourth protection area, and the edge of each protection plate is provided with a reinforcing rib bulge and is connected with a corresponding replaceable screw seat through a connecting hole and a bolt, thereby simplifying the protection plate structure, reducing the types of the protection plates, carrying out modularized design and improving the applicability of the protection plates, because of the design of the reinforcing rib bulges, lightening the self weight of the protection plates on the premise of meeting the rigidity requirement, and improving and unifying the installation mode, the production efficiency can be obviously improved. When the device is used, the impact of sand, stone, wind and snow on equipment and pipelines under the vehicle can be effectively reduced, the risk of equipment failure caused by the invasion of foreign matters is reduced, and the normal operation of the equipment in the running process of the vehicle is ensured.

The railway vehicle provided by the invention is provided with the under-vehicle protection plate component, and the under-vehicle protection component has the technical effects, so that the railway vehicle provided with the under-vehicle protection plate component also has the corresponding technical effects.

Drawings

Fig. 1 is a schematic structural diagram of an under-vehicle protection panel assembly disclosed in an embodiment of the present invention;

FIG. 2 is a top view of the under-vehicle fender assembly of FIG. 1;

FIG. 3 is a schematic structural view of the first guard plate shown in FIG. 2;

FIG. 4 is a left side view of FIG. 3;

FIG. 5 is a bottom view of FIG. 3;

FIG. 6 is a partial enlarged view of portion I of FIG. 3;

FIG. 7 is a schematic structural view of the second guard shown in FIG. 2;

FIG. 8 is a partial enlarged view of portion II of FIG. 7;

FIG. 9 is a schematic view of the third prevention plate shown in FIG. 3;

FIG. 10 is a schematic view of the fourth containment sheet shown in FIG. 3;

FIG. 11 is a left side view of FIG. 10;

FIG. 12 is a bottom view of FIG. 10;

FIG. 13 is a schematic view of the fifth fender shown in FIG. 3;

FIG. 14 is a left side view of FIG. 13;

FIG. 15 is a bottom view of FIG. 13;

fig. 16 is a partial cross-sectional view of the attachment of the shield plate to the replaceable screw set by a screw.

In the figure:

1. the vehicle body underframe 2, the sleeper beam 3, the first protection plate 31, the first plate body 32, the second plate body 33, the inclined plate body 4, the second protection plate 5, the longitudinal beam 6, the vehicle body floor 7, the edge beam 8, the connecting hole 9, the replaceable screw seat 10, the bolt 11, the reinforcing rib protrusion 12, the arc-shaped concave part 13, the U-shaped open slot 14, the lining backing plate 15, the rivet 16, the blanking area 17, the opening slot 18, the third protection plate 19, the fourth protection plate 20, the fifth protection plate 21, the traction beam 22, the concave part 23, the rubber washer 24, the flat washer 25, the elastic washer 25

Detailed Description

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

In this document, terms such as "upper, lower, left, right" and the like are established based on positional relationships shown in the drawings, and the corresponding positional relationships may vary depending on the drawings, and therefore, they are not to be construed as absolute limitations on the scope of protection; moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of an under-vehicle protection panel assembly according to an embodiment of the present invention; fig. 2 is a top view of the under-vehicle fender assembly of fig. 1.

As shown in the drawings, in a specific embodiment, the under-vehicle protection plate assembly provided by the invention can be suitable for an inter-city motor train unit and mainly comprises a plurality of protection plates arranged in a protection area below a vehicle body underframe 1, a sufficient safety distance is reserved between each protection plate and a bogie below the protection plate, and a proper distance (160 mm at the highest part and 202mm at the lowest part) is reserved between each protection plate and the vehicle body underframe 1 so as to form an accommodating space which can penetrate through components such as a brake pipeline, an under-vehicle cable and the like.

Through analysis and unified equipment interface, according to the sleeper beam inboard and outside, divide the protection zone into four plates, every plate sets up two to three guard plates, is a protection unit, and every guard plate unit is punching press integrated into one piece's stainless steel board to set up the strengthening rib arch at the panel edge.

Specifically, the protection area is divided into a first protection area and a second protection area which are positioned outside the sleeper beam 2 and distributed left and right, and a third protection area and a fourth protection area which are positioned inside the sleeper beam and distributed left and right; at least two protection plates are arranged in the first protection area and the second protection area respectively, the protection plates in the first protection area and the second protection area are arranged in a bilateral symmetry mode, three protection plates are arranged in the third protection area and the fourth protection area respectively, and the protection plates in the third protection area and the fourth protection area are arranged in a bilateral symmetry mode.

First guard plate 3 and second guard plate 4 that the bilateral symmetry distributes are equipped with in first guard area and the second guard area, take the second guard area as an example, first guard plate 3 and second guard plate 4 that set up in it are the rectangle roughly, first guard plate 3 is close to sleeper beam 2, position between second guard plate 4 and sleeper beam 2, first guard plate 3 is connected with sleeper beam 2, draw beam 21 and automobile body floor 6, second guard plate 4 is connected with draw beam 21, boundary beam 7 and automobile body floor 6, the width of second guard plate 4 is greater than first guard plate 3, the inboard border that both are close draw beam 21 aligns each other, together protect the second guard area with the mode of combination.

Referring to fig. 3, 4, 5 and 6, fig. 3 is a schematic structural view of the first protection plate shown in fig. 2; FIG. 4 is a left side view of FIG. 3; FIG. 5 is a bottom view of FIG. 3; fig. 6 is a partially enlarged view of the portion I in fig. 3.

As shown in the figure, the first protection plate 3 is substantially square, material is properly removed at a position possibly interfering with equipment under the vehicle to form a step-shaped avoidance position, the periphery of the first protection plate 3 is provided with connecting holes 8 distributed at intervals at positions close to the edge, the vehicle body underframe 1 is provided with replaceable screw seats 9 corresponding to the connecting holes 8, and the first protection plate 3 is connected with the replaceable screw seats 9 through bolts 10 arranged in the connecting holes 8.

First guard plate 3 is provided with the protruding 11 of strengthening rib that forms after bending downwards at the edge, and the protruding 11 of strengthening rib is high 15mm or 20 mm's bending edge, can guarantee first guard plate 3's bulk rigidity through setting up the protruding 11 of strengthening rib, guarantees that the structure can have sufficient rigidity to resist the deformation, makes first guard plate 3 have sufficient safety margin under intercity EMUs operating speed.

The right angle position at 11 both ends of strengthening rib designs into the hypotenuse shape, and is equipped with the arc indent position 12 that is located the guard plate body between the tip of two adjacent strengthening rib archs 11, and strengthening rib arch 11 is personally submitted 90 with the guard plate board. Of course, the reinforcing rib protrusions 11 and the surface of the protection plate can form other included angles of 70-110 degrees.

Because the first protection plate 3 is connected with the sleeper beam 2, the first protection plate 3 and the second protection plate 32 are parallel to each other, the first protection plate 3 is connected with the sleeper beam 2 through the first plate 31, in the longitudinal height direction, the height of the second plate 32 is slightly higher than that of the first plate 31, the length of the second plate 32 is also larger than that of the first plate 31, the first plate 31 and the second plate 32 are in transition connection through the inclined plate 33 and the reverse first bending angle alpha and second bending angle beta, and the angles of the first bending angle alpha and the second bending angle beta can be controlled to be 120-125 degrees.

The first protection plate 3 is formed with "U" shape open slot 13 towards the outside respectively at the both ends of first bend angle alpha and second bend angle beta, is located and is equipped with inside lining backing plate 14 between the strengthening rib arch 11 on "U" shape open slot 13 both sides, and inside lining backing plate 14 is the form of bending in the direction of perpendicular to protection plate face, and its both ends are riveted through rivet 15 with corresponding strengthening rib arch 11 respectively. Through setting up "U" shape open slot 13 and inside lining backing plate 14, can show the structural strength who improves first guard plate 3 at first bend angle and the second bend angle position, prevent to appear warping, defect such as fracture and lead to the guard plate inefficacy in the position of bending.

Referring to fig. 7 and 8, fig. 7 is a schematic structural view of the second protection plate shown in fig. 2; fig. 8 is a partially enlarged view of a portion II in fig. 7.

As shown in the figure, the structure of second guard plate 4 is the same with first guard plate 3 generally, except that whole shape, size and set up the position difference, the difference mainly lies in, because second guard plate 4 is not connected with sleeper beam 2, consequently it is whole for smooth plate body structure, its board body is not bent, and simultaneously, because it needs to be connected with boundary beam 7, consequently, the protruding 11 of strengthening rib and the contained angle of guard plate face that is close to boundary beam department are greater than the contained angle of the protruding 11 of all the other three side strengthening ribs and guard plate face, its protruding 11 of strengthening rib and the guard plate face that is close to boundary beam department personally submits 135's contained angle, so that better with boundary beam 7 phase-match, guarantee the guard action.

In addition, the second protection plate 4 is further provided with a rectangular blank area 16 recessed inwards at the edge position of the plate body, two corner cutting positions of the blank area 16 are provided with opening grooves 17 expanding inwards, a lining backing plate 14 is arranged between the reinforcing rib bulges 11 at two sides of the opening grooves 17, the lining backing plate 14 is bent at the same angle with the corner cutting positions, and two ends of the lining backing plate are respectively riveted with the corresponding reinforcing rib bulges 11. Through setting up opening groove 17 and inside lining backing plate 14, can show the structural strength who improves two corner cuts positions of second guard plate 4, prevent to appear defects such as deformation, cracks at corner cuts position and lead to the guard plate to become invalid.

Referring to fig. 9, fig. 9 is a schematic structural diagram of the third prevention plate shown in fig. 3.

As shown in the figure, a third protection plate 18, a fourth protection plate 19 and a fifth protection plate 20 are symmetrically distributed in the third protection area and the fourth protection area, for example, the third protection plate 18, the fourth protection plate 19 and the fifth protection plate 20 are substantially rectangular, the third protection plate 10 is located between the fourth protection plate 19, the fifth protection plate 20 and the sleeper beam 2, and the fourth protection plate 19 is located outside the fifth protection plate 20.

The structure of the third protection plate 18 is substantially the same as that of the first protection plate 3, the plate bodies of the third protection plate and the first protection plate are bent to adapt to the change of the height of the vehicle underframe, the difference is mainly that the overall shape, the size and the arrangement position are different, and similarly to the first protection plate 3, the third protection plate 18 is connected with the sleeper beam 2, the longitudinal beam 5 and the vehicle body floor 6 through the connecting hole 8, the bolt 10 and the replaceable screw seat 9.

Referring to fig. 10, 11 and 12, fig. 10 is a schematic structural view of the fourth protection plate shown in fig. 3; FIG. 11 is a left side view of FIG. 10; fig. 12 is a bottom view of fig. 10.

As shown in the figure, the structure of the fourth protection plate 19 is substantially the same as that of the first protection plate 3, except that the overall shape, size and arrangement position are different, the difference is mainly that the fourth protection plate 19 is connected with the vehicle body floor 6 and the boundary beam 7, because the fourth protection plate 19 is not connected with the sleeper beam 2, the fourth protection plate is a flat plate structure on the whole, the plate body is not bent, and meanwhile, because the fourth protection plate is required to be connected with the boundary beam 7, the reinforcing rib protrusion 11 close to the boundary beam is 135 degrees away from the protection plate, so as to be better matched with the boundary beam 7 and ensure the protection effect.

In addition, the right-angled portion of the fourth protection plate 19 adjacent to the third protection plate 18 is designed into a bevel edge shape, and a rectangular concave portion 22 is provided on the bevel edge, so as to better match with the bevel edge portion on the side beam 7, and achieve a better protection effect.

Referring to fig. 13, 14 and 15, fig. 13 is a schematic structural view of the fifth protection plate shown in fig. 3; FIG. 14 is a left side view of FIG. 13; fig. 15 is a bottom view of fig. 13.

As shown in the drawings, the fifth fender 20 has substantially the same structure as the first fender 3, except that the overall shape, size and installation position are different, and the difference is mainly that the fifth fender 20 is connected to the longitudinal beam 5 and the vehicle body floor 6, and since the fifth fender 20 is not connected to the body bolster 2, the fifth fender 20 is of a flat plate structure as a whole, the plate body thereof is not bent, the side of the fifth fender 20 connected to the longitudinal beam 5 is aligned with the side of the third fender 18 connected to the longitudinal beam 5, and the overall width of the fourth fender 19 and the fifth fender 20 is greater than that of the third fender 18.

Referring to fig. 16, fig. 16 is a partial sectional view of the protection plate connected to the replaceable screw seat by a screw.

As shown in the figure, the replaceable screw seat 9 for fixing the protection plates can be welded on the lower planes of the sleeper beam 2, the boundary beam 7, the traction beam 21, the longitudinal beam 5 and the vehicle body floor 6 of the vehicle body underframe 1 according to different mounting positions, so that the installation is convenient, and the maintenance is convenient.

A rubber washer 23 is arranged between the protection plate and the replaceable screw seat 9, and a flat washer 24 and an elastic washer 25 are arranged between the bolt 10 and the protection plate. Through optimizing mounting structure, unified mounting means, can alleviate the intensity of labour of installation guard plate, improve production efficiency, have good economic value, and increase rubber packing ring 25 and lock washer, can effectively resist the guard plate vibration that the vibration arouses probably through rubber packing ring 23 under the prerequisite of guaranteeing that mounting structure is stable, reduce the vibration because of the operation in-process and cause the abnormal sound.

Above-mentioned first guard plate 3 and second guard plate 4 are except having seted up connecting hole 8 in the position that is close the edge, the board that still is simultaneously seted up connecting hole 8 on one's body, automobile body chassis 1's the floor lower surface is equipped with corresponding removable screw seat 9, these removable screw seat 9 optional settings are in the position that can avoid car pipeline or circuit down, and extend downwards from floor lower surface, high steerable is about 160mm, through set up connecting hole 8 on one's body at the board of guard plate, be connected with removable screw seat 9 through bolt 10, with effectively prevent that the tremble phenomenon from appearing in the guard plate in the use.

The first protection plate 3, the second protection plate 4, the third protection plate 18, the fourth protection plate 19 and the fifth protection plate 20 are all 304 stainless steel plates integrally formed by stamping, the thickness of the 304 stainless steel plates is 1.5mm, and compared with the protection plates with the thickness of 2mm in the prior art, the thickness of the 304 stainless steel plates can be reduced by 0.5 mm.

Through optimizing the thickness of selecting the material to the guard plate to rigidity matching, effectively realized at high rigidity, high strength and alleviateed the balance between the dead weight, guaranteed under the prerequisite that there is safety margin at intercity EMUs operation speed level, avoided reducing the rigidity that causes because of thickness not enough, effectively realized the lightweight of guard plate, and through lightweight design, under the prerequisite that satisfies intercity EMUs speed level, lacked the guard plate kind, improved the suitability of single kind of guard plate.

The above embodiments are merely preferred embodiments of the present invention, and are not limited thereto, and on the basis of the above embodiments, various embodiments can be obtained by performing targeted adjustment according to actual needs. For example, due to the use of a modular structure, subsequent protective plate materials can be replaced by composite materials such as carbon fibers, and the like, and the protective plate material is integrally formed, has the characteristics of light weight and high rigidity, and the like. This is not illustrated here, since many implementations are possible.

In order to reduce the types of the protection plates and simplify the installation mode, under the guidance of a modularization thought, the protection plate unit is additionally provided with the reinforcing rib protrusions and the connection points with the underframe of the vehicle body are properly increased, so that the overall rigidity is increased, the interface with equipment is simplified, the installation mode of the protection plates below the underframe is unified, the types of the protection plates are finally reduced, the applicability of the protection plates is high, and the manufacturing cost is saved; meanwhile, the connection points are optimized, the installation is simple, and the production efficiency is improved; the design of passive vibration isolation can avoid abnormal sound in the application process, and has good economic and social benefits.

In addition to the above-mentioned under-vehicle protection plate assembly, the present invention also provides a rail vehicle, which may be various motor train units or high-speed trains, such as an inter-city motor train unit, and includes a vehicle body and a bogie disposed below the vehicle body, wherein a protection structure is disposed on a bogie region of a bottom frame of the vehicle body, and the protection structure is the above-mentioned under-vehicle protection plate assembly.

The under-vehicle protection plate assembly and the rail vehicle provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The under-vehicle protection plate assembly is characterized in that the protection area comprises a first protection area and a second protection area which are positioned on the outer side of a sleeper beam and distributed left and right, and a third protection area and a fourth protection area which are positioned on the inner side of the sleeper beam and distributed left and right; at least two protection plates are arranged in the first protection area and the second protection area respectively, and at least three protection plates are arranged in the third protection area and the fourth protection area respectively; connecting holes distributed at intervals are formed in the periphery of each protection plate at positions close to the edges, and reinforcing rib protrusions formed after downward bending are arranged on the edges; the vehicle body underframe is provided with replaceable screw seats corresponding to the connecting holes, and the protection plate is connected with the replaceable screw seats through bolts arranged in the connecting holes; the protective plate connected with the sleeper beam is provided with a first plate body and a second plate body which are parallel to each other, and the protective plate is connected with the sleeper beam through the first plate body; the second plate body is higher than and longer than the first plate body, and the second plate body and the first plate body are in transition connection through the inclined plate body and the reverse first folding angle and second folding angle; the guard plate is formed with "U" shape open slot towards the outside respectively at the both ends of first bent angle and the second bent angle, is located "U" shape open slot both sides be equipped with the inside lining backing plate between the strengthening rib arch, the inside lining backing plate is the perpendicular to be the form of bending on the direction of guard plate face, its both ends respectively with correspond the strengthening rib arch is riveted mutually.

2. The under-vehicle fender assembly of claim 1, wherein the fender panels of the first and second fender regions are arranged in a left-right symmetrical arrangement, and the fender panels of the third and fourth fender regions are arranged in a left-right symmetrical arrangement.

3. The under-vehicle fender assembly of claim 2, wherein the first fender and the second fender are symmetrically arranged in the first fender region and the second fender region, the first fender and the second fender are substantially rectangular, the first fender is connected with the sleeper beam, the traction beam and the vehicle body floor, the second fender is connected with the traction beam, the boundary beam and the vehicle body floor, the first fender is located between the second fender and the sleeper beam, and the width of the second fender is larger than that of the first fender.

4. The under-vehicle protection panel assembly according to claim 2, wherein a third protection panel, a fourth protection panel and a fifth protection panel are symmetrically arranged in the third protection area and the fourth protection area, the third protection panel, the fourth protection panel and the fifth protection panel are substantially rectangular, the third protection panel is connected with the sleeper beam, the longitudinal beam and the vehicle body floor, the fourth protection panel is connected with the vehicle body floor and the side beam, the fifth protection panel is connected with the longitudinal beam and the vehicle body floor, the third protection panel is located between the fourth protection panel, the fifth protection panel and the sleeper beam, and the fourth protection panel is located on the outer side of the fifth protection panel.

5. The under-vehicle protection panel assembly according to claim 4, wherein the overall width of the fourth protection panel and the fifth protection panel is larger than that of the third protection panel, and a right-angled portion of the fourth protection panel adjacent to the third protection panel is designed in a shape of a beveled edge, and a rectangular recessed portion is provided on the beveled edge.

6. The under-vehicle fender assembly of claim 1, wherein the stiffener projections are bent edges having a height of 15mm to 20mm, and wherein the bend angle between the stiffener projection near the side rail and the fender panel surface is greater than the bend angle between the remaining stiffener projections and the fender panel surface.

7. The under-vehicle fender assembly of claim 6, wherein the reinforcement protrusions adjacent to the side rails form bending angles of 115-155 degrees with the fender panel, and the remaining reinforcement protrusions form bending angles of 70-110 degrees with the fender panel.

8. The under-vehicle fender assembly of claim 1, wherein the right-angled portions of the two ends of the protrusions of the reinforcing rib are designed to be in the shape of a bevel edge, and an arc-shaped concave portion located on the fender body is arranged between the two adjacent ends of the protrusions of the reinforcing rib.

9. The under-vehicle protection plate assembly according to claim 1, wherein at least one of the protection plates is provided at an edge of the body thereof with a cut-out region recessed inward, a cut-out groove enlarged inward is formed at a cut-out corner portion of the cut-out region, a lining pad plate is provided between the reinforcing rib protrusions located at both sides of the cut-out groove, the lining pad plate is bent at an angle corresponding to the cut-out corner portion, and both ends of the lining pad plate are respectively riveted with the corresponding reinforcing rib protrusions.

10. The under-vehicle protection panel assembly according to claim 1, wherein at least one of the protection panels has a connection hole on a panel body, the under-floor surface of the under-vehicle chassis has a replaceable screw seat for avoiding an under-vehicle duct or line, and the connection hole on the panel body is connected to the corresponding replaceable screw seat by a bolt.

11. The under-vehicle fender assembly of claim 1, wherein the replaceable screw bosses are welded to the body underframe bolster, edge rail, trailing beam, longitudinal beam, and underfloor plane.

12. The under-hood fender assembly according to any one of claims 1 to 11, wherein a rubber washer is provided between the fender and the replaceable screw seat, and a flat washer and an elastic washer are provided between the bolt and the fender.

13. The under-vehicle fender assembly according to any one of claims 1 to 11, wherein the fender is a stamped and integrally formed stainless steel plate having a thickness of 1.4mm to 1.6 mm.

14. A rail vehicle comprising a vehicle body and a bogie arranged below the vehicle body, the undercarriage of the vehicle body being provided with a guard structure in the region of the bogie, characterized in that the guard structure comprises an under-car guard plate assembly according to any one of the preceding claims 1 to 13.