Spliced ​​car body and rail vehicle

Abstract

The present invention discloses a spliced ​​car body and a rail vehicle, wherein the roof, chassis, side roof and side wall of the spliced ​​car body are respectively formed by splicing double-layer pultruded profiles, and the double-layer pultruded profiles include an outer plate, an inner plate and a cavity separated by ribs in the interlayer of the outer plate and the inner plate; the upper edge and the lower edge of the side roof are respectively connected to the edge of the roof and the upper edge of the side wall through a lap joint, and the lower edge of the side wall is connected to the edge of the chassis through a side wall connector; the side wall connector is a single double-layer pultruded profile, the upper edge of which is connected to the lower edge of the side wall through a plug joint, and the lower edge of which is connected to the edge of the chassis through a push joint. Under the same strength conditions, the car body structure has the characteristics of high rigidity, light weight, high production efficiency, etc., and can meet the complex working load requirements such as the air tightness load and torsional load of the rail vehicle body.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicles, in particular to a spliced ​​vehicle body structure of a rail vehicle. The present invention also relates to a rail vehicle provided with the spliced ​​vehicle body structure. Background Art

[0002] As the speed of rail vehicles continues to increase, higher requirements are placed on the structural strength, rigidity and lightweight design of rail vehicles.

[0003] The metal car bodies of existing rail vehicles are mostly assembled by welding metal materials such as carbon steel, stainless steel and aluminum alloy. Compared with composite car bodies, they have disadvantages such as heavy weight, low strength and easy corrosion. Composite car bodies are mainly plate-beam assembly structures or single-layer profile splicing structures. The product structure is divided into many blocks, and the assembly workload is large. The blocks are connected by rivets or adhesive rivets. There are many connection holes, the rivet holes need to be processed a lot, and it is easy to leak rain. The various structures of the car body use a large number of metal connectors, which have poor weight reduction effects and low production efficiency. The car body wall panels are mostly sandwich structures, and the core materials are prone to quality defects during molding, and the sound insulation effect is poor.

[0004] It can be seen that the body structure of rail vehicles has shortcomings such as complex structure, heavy overall weight and low production efficiency. It can no longer meet the vehicle's higher technical requirements for lightweight, corrosion resistance, etc., and further improvements are needed. Summary of the invention

[0005] The purpose of the present invention is to provide a spliced ​​car body. Under the same strength conditions, the car body structure has the characteristics of high rigidity, light weight, high production efficiency, etc., and can meet the complex working load requirements such as air tightness load and torsion load of rail vehicle body.

[0006] Another object of the present invention is to provide a rail vehicle provided with the spliced ​​vehicle body.

[0007] To achieve the above-mentioned purpose, the present invention provides a spliced ​​vehicle body, comprising a roof, an underframe, and side roofs and side walls on both sides; the upper edge of the side roof is connected to the edge of the roof, the upper edge of the side wall is connected to the lower edge of the side roof, and the lower edge of the side wall is connected to the edge of the underframe; the roof, underframe, side roof and side wall are respectively formed by splicing double-layer pultruded profiles of different shapes, and the double-layer pultruded profile comprises an outer plate, an inner plate and a cavity separated by ribs in the interlayer of the outer plate and the inner plate; the upper edge and the lower edge of the side roof are respectively connected to the edge of the roof and the upper edge of the side wall through a lap joint, and the lower edge of the side wall is connected to the edge of the underframe through a side wall connector; the side wall connector is a single double-layer pultruded profile, the upper edge of which is connected to the lower edge of the side wall through a plug-in joint, and the lower edge of which is connected to the edge of the underframe through a push-joint joint.

[0008] Preferably, the lap joint includes a first lap end and a second lap end respectively formed on the edges of two connected double-layer pultruded profiles, the outer side of the first lap end has a first lap edge formed by extending the outer plate, the inner side of the second lap end has a second lap edge formed by extending the inner plate, the outer side of the second lap end is formed with a step portion that can be engaged with the first lap edge, and the inner side of the first lap end is formed with a step portion that can be engaged with the second lap edge.

[0009] Preferably, the end face, inner side surface and inner surface of the first overlapping edge of the first overlapping end are formed with grooves or recesses; or, the end face, outer side surface and inner surface of the second overlapping edge of the second overlapping end are formed with grooves or recesses.

[0010] Preferably, the plug connector comprises a male plug and a female plug respectively formed on the edges of two connected double-layer pultruded profiles, the female plug having an outer edge and an inner edge of a socket formed by extending an outer plate and an inner plate, a step portion capable of being engaged with the outer edge of the socket being formed on the outer plate of the male plug, and a step portion capable of being engaged with the inner edge of the socket being formed on the inner plate of the male plug.

[0011] Preferably, the end surface of the male plug, the outer surface of the outer plate and the inner plate are formed with grooves or recesses; or, the inner end surface of the female plug, the outer plate and the inner surface of the inner plate are formed with grooves or recesses.

[0012] Preferably, the push-joint includes a push-joint groove formed on the upper surface of the edge of the base frame and a push-joint formed on the lower edge of the side wall connector; the push-joint groove includes a first push-joint plate and a second push-joint plate, the first push-joint plate is located on the outside, the second push-joint plate is located on the inside, and the spacing between the first push-joint plate and the second push-joint plate gradually increases from top to bottom, forming a trapezoidal push-joint groove with an opening upward; the push-joint of the side wall connector is in a trapezoidal shape in cross section that can be pushed into the push-joint groove from the end.

[0013] Preferably, a groove or a concave position is formed on the inner surface of the push-joint groove or the outer surface of the push-joint joint.

[0014] Preferably, the upper edge and the lower edge of the side roof are respectively connected to the edge of the roof and the upper edge of the side wall via lap joints in opposite lap directions.

[0015] Preferably, in cross section, the distance between the outer plate and the inner plate of the double-layer pultruded profile of the side roof first gradually increases and then gradually decreases from the upper edge to the lower edge; in cross section, the distance between the outer plate and the inner plate of the double-layer pultruded profile of the side wall gradually decreases and then gradually increases from the upper edge to the lower edge line.

[0016] Preferably, it further comprises an air duct profile connected to the bottom of the roof, wherein the air duct profile is used to form a sealed roof ventilation air duct.

[0017] Preferably, the interior of the air duct profile has an axial channel opened upward, and the axial channel forms the roof ventilation duct together with the lower surface of the double-layer pultruded profile of the roof.

[0018] Preferably, the axial channel includes a main channel located at a central position and secondary channels located at both sides of the main channel.

[0019] Preferably, the secondary channel comprises a first secondary channel located outside the main channel and a second secondary channel located outside the first secondary channel; the main channel is generally rectangular, the first secondary channel is generally trapezoidal, and the second secondary channel is generally triangular.

[0020] Preferably, the axial channel of the duct profile is divided by a vertical partition plate, and the upper edge of the partition plate and the upper edges on both sides of the duct profile are provided with a bent connecting portion, which is attached to the lower surface of the roof and connected to the lower surface of the roof by riveting.

[0021] Preferably, the duct profile includes a left profile and a right profile that are symmetrical on both sides and a connecting plate located in the middle. The connecting plate forms the bottom of the main channel, and its left and right edges respectively overlap and connect the extended edges of the bottom of the left and right profiles.

[0022] Preferably, the double-layer pultruded profile of the roof includes a first roof profile located in the middle and a second roof profile and a third roof profile that are bilaterally symmetrical, and the first roof profile is connected to the second roof profile and the third roof profile respectively through plug-in connectors.

[0023] Preferably, the double-layer pultruded profile of the side roof comprises a first side roof profile and a second side roof profile, wherein the first side roof profile and the second side roof profile are connected via a plug-in joint.

[0024] Preferably, the lap joint position of the upper edge of the side roof is the same as the position of the roof air conditioner mounting seat, and its lap joint structure is consistent with the roof equipment mounting seat joint; the lap joint position of the lower edge of the side roof is the same as the upper edge of the window opening.

[0025] Preferably, the side roof is provided with a mounting rib plate at the upper edge of the door for assembling the door.

[0026] Preferably, the double-layer pultruded profile of the side wall includes a first side wall profile, a second side wall profile, a third side wall profile and a fourth side wall profile, the first side wall profile is connected to the second side wall profile via a plug-in joint, the second side wall profile and the third side wall profile are connected via a lap joint, and the third side wall profile and the fourth side wall profile are connected via a plug-in joint.

[0027] Preferably, the height position of the lap joint between the second side wall profile and the third side wall profile is consistent with the height of the lower edge of the vehicle window, and the first side wall profile and the second side wall profile are disconnected at the vehicle body window, and the disconnection size is consistent with the length of the vehicle window to form a window opening.

[0028] Preferably, the double-layer pultruded profile of the chassis includes a first chassis profile located in the middle and a second chassis profile, a third chassis-shaped groove, a fourth chassis profile and a fifth chassis profile, a sixth chassis-shaped groove, and a seventh chassis profile symmetrically distributed on both sides. The seven double-layer pultruded profiles are connected by six plug-in joints.

[0029] Preferably, the height of the first chassis profile is higher than the second chassis profile and the fifth chassis profile on both sides, and the second chassis profile and the fifth chassis profile have bending parts extending obliquely upward to transitionally connect with the first chassis profile.

[0030] Preferably, a platform step formed by removing the flange of the socket is provided at the connection between the side wall and the base frame at the door position to install the door mechanism.

[0031] Preferably, the cavity of the double-layer pultruded profile comprises a triangular cavity, a trapezoidal cavity, a rectangular cavity and a combination thereof.

[0032] Preferably, the cavity of the double-layer pultruded profile of the roof, the chassis, the side roof or the side wall is filled with a heat insulating material, a vibration isolating material or a noise reducing material.

[0033] Preferably, the double-layer pultruded profile is a carbon fiber composite material, and adjacent double-layer pultruded profiles are connected at joints by adhesive; or

[0034] The double-layer pultruded profiles are made of aluminum alloy material, and adjacent double-layer pultruded profiles are connected at joints by welding.

[0035] To achieve the above-mentioned other object, the present invention further provides a rail vehicle, comprising a vehicle body, windows and doors arranged on the vehicle body, and a roof air conditioning device, wherein the vehicle body is a spliced ​​vehicle body as described in any one of the above-mentioned items.

[0036] The car body provided by the present invention is composed of a car roof, a chassis, and side car roofs, side walls, and side wall connectors located on both sides, which are assembled by overlapping, plugging, and pushing joints, and together form a barrel-shaped car body structure, and each component is a double-layer pultruded profile, and the multi-cavity profile has the characteristics of high strength, high rigidity, and light weight, so that the car body structure has the characteristics of high rigidity, low deadweight, and high production efficiency under the same strength conditions, which can meet the complex working conditions such as the air tightness load and torsion load of the rail vehicle body. The requirements, which solve the problems of heavy deadweight, low strength, and easy corrosion of the existing metal car body of the rail vehicle, are well solved. At the same time, it also solves the problems of many blocks, poor sealing, poor weight reduction effect, and low production efficiency of the existing composite material car body. In addition, the car body can also flexibly adjust the product assembly method according to the actual production resources of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a side view of a spliced ​​vehicle body disclosed in an embodiment of the present invention;

[0038] Figure 2 for Figure 1 AA view of the spliced ​​body shown;

[0039] Figure 3 for Figure 2 A partial enlarged schematic diagram of the I portion shown in FIG.

[0040] Figure 4 The cross-sectional structure diagram of the roof and the air duct profile forming the roof ventilation air duct;

[0041] Figure 5 for Figure 4 A partial enlarged schematic diagram of part II shown in FIG.

[0042] Figure 6 It is a schematic diagram of the cross-sectional structure of the side roof;

[0043] Figure 7 It is a schematic diagram of the cross-sectional structure of the side wall;

[0044] Figure 8 for Figure 1 BB view of the spliced ​​body shown;

[0045] Fig. 9 for Figure 8 A partial enlarged schematic diagram of part III shown in FIG.

[0046] Fig.10 for Figure 1 CC view of the spliced ​​body shown;

[0047] Fig.11 for Fig.10 Schematic diagram of the cross-sectional structure of the underframe where the door is located is shown in FIG.

[0048] In the figure:

[0049] 1. Roof 1-1. First roof profile 1-2. Second roof profile 1-3. Third roof profile 1-4. Male plug 1-5. Female plug 1-6. Groove 2. Chassis 2-1. First chassis profile 2-2. Second chassis profile 2-3. Third chassis-shaped groove 2-4. Fourth chassis profile 2-5. Fifth chassis profile 2-6. Sixth chassis-shaped groove 2-7. Seventh chassis profile 2-8. First push-on plate 2-9. Second push-on plate 2-10. Platform step 3. Side roof 3-1. First side roof profile 3- 2. Second side roof profile 3-3. First lap end 4. Side wall 4-1. First side wall profile 4-2. Second side wall profile 4-3. Third side wall profile 4-4. Fourth side wall profile 4-5. Second lap end 5. Side wall connector 5-1. Push-fit joint 6. Air duct profile 6-1. Connecting plate 6-2. Left profile 6-3. Right profile 6-4. Divider 6-5. Connecting part 6-6. Bearing part 7. Roof ventilation duct 8. Door mounting rib 9. Air conditioning mounting seat interface 10. Window mounting rib 11. Vehicle body DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0051] In this article, the terms "upper, lower, left, right" and the like are established based on the positional relationships shown in the drawings. The corresponding positional relationships may also change depending on the drawings, and therefore cannot be understood as absolute limitations on the scope of protection; moreover, relational terms such as "first" and "second" and the like are merely used to distinguish one component from another with the same name, and do not necessarily require or imply any actual relationship or order between these components.

[0052] Please refer to Figure 1 , Figure 2 , Figure 1 It is a side view of a spliced ​​vehicle body disclosed in an embodiment of the present invention; Figure 2 for Figure 1 AA view of the spliced ​​body shown.

[0053] Carbon fiber composite materials have excellent comprehensive properties of light weight, high strength and high weather resistance, making them the preferred material for solving problems such as lightweighting of rail vehicles.

[0054] As shown in the figure, in a specific embodiment, a spliced ​​car body 11 provided by the present invention is mainly composed of double-layer pultruded profiles of carbon fiber composite materials in a spliced ​​manner. Adjacent double-layer pultruded profiles are connected by adhesive at the joints to achieve seamless connection of each module. The double-layer pultruded profiles are produced by pultrusion technology. The main section of the car body is composed of twenty-seven pieces of composite double-layer pultruded profiles, which are assembled into a barrel-shaped composite car body main structure through sixteen plug-in joints, six lap joints and two push-joint joints of the self-expanding adhesive bonding profiles. The structural car body has excellent strength, rigidity, and air tightness, and can meet the complex working load requirements of rail vehicle car body air tightness load, torsion load and other complex working conditions. Moreover, under the same strength conditions, the dead weight is small, the car body section structure is simple, the structure is divided into fewer blocks, the assembly workload is small, the car body profile can be quickly assembled and connected, and the car body production efficiency is high and the quality is stable.

[0055] Specifically, the vehicle body 11 is mainly composed of a roof 1, a base frame 2, and side roofs 3 and side walls 4 located on both sides. The upper edge of the side roof 3 is connected to the edge of the roof 1, the upper edge of the side wall 4 is connected to the lower edge of the side roof 3, and the lower edge of the side wall 2 is connected to the edge of the base frame 2.

[0056] The roof 1, the chassis 2, the side roof 3 and the side wall 4 are each formed by splicing double-layer pultruded profiles of different shapes, and the double-layer pultruded profile includes an outer panel, an inner panel and a cavity formed by ribs in the sandwich between the outer panel and the inner panel; the upper edge and the lower edge of the side roof 3 are respectively connected to the edge of the roof 1 and the upper edge of the side wall 4 through lap joints, and the lower edge of the side wall 3 is connected to the edge of the chassis 2 through a side wall connector 5; the side wall connector 5 is a single double-layer pultruded profile, and its upper edge is connected to the lower edge of the side wall 4 through a plug joint, and its lower edge is connected to the edge of the chassis 2 through a push joint.

[0057] According to the different technical requirements of strength, rigidity, sealing, lightweight and other parts of the vehicle body structure, the vehicle body profile is a variable-size cross-sectional structure. The spacing between the outer panel and the inner panel of the double-layer pultruded profile of the side roof 3 gradually increases and then gradually decreases from the upper edge to the lower edge. The spacing between the outer panel and the inner panel of the double-layer pultruded profile of the side wall 4 gradually decreases and then gradually increases from the upper edge to the lower edge line. The cavities of each profile are different combinations of triangular cavities, trapezoidal cavities, rectangular cavities and the like.

[0058] Please refer to Figure 4 , Figure 4 It is a schematic diagram of the cross-sectional structure of the roof ventilation duct formed by the roof and the duct profile.

[0059] As shown in the figure, the double-layer pultruded profile of the roof 1 mainly consists of a first roof profile 1-1 located in the middle and a second roof profile 1-2 and a third roof profile 1-3 that are symmetrical on both sides. The first roof profile 1-1 is connected to the second roof profile 1-2 and the third roof profile 1-3 respectively through plug-in connectors.

[0060] The three roof profiles are bonded together by two plug-in joints using self-expanding adhesive. The inner cavity of the profile is designed as a trapezoidal cavity based on the strength and installation interface requirements and the weight reduction requirements. The plug-in joints should be set in the low stress area of ​​the roof structure.

[0061] An air duct profile 6 is provided below the vehicle roof 1 . The interior of the air duct profile 6 has an axial channel that opens upward. The axial channel and the lower surface of the double-layer pultruded profile of the vehicle roof 1 together form a sealed roof ventilation duct 7 .

[0062] The air duct profile 6 is formed by bonding three profiles, namely, a left profile 6-2 and a right profile 6-3 which are symmetrical on the left and right, and a connecting plate 6-1 located in the middle. The axial channel of the air duct profile 6 is divided into a main channel located in the central position and auxiliary channels located on both sides of the main channel. The left and right edges of the connecting plate 6-1 overlap and connect the extended edges of the bottom of the left profile 6-2 and the right profile 6-3 respectively to form the bottom of the main channel. The main channel is generally rectangular, and the auxiliary channel includes a first auxiliary channel located outside the main channel and a second auxiliary channel located outside the first auxiliary channel. The first auxiliary channel is generally trapezoidal, and the second auxiliary channel is generally triangular.

[0063] The axial channel of the duct profile 6 is divided by a vertical partition plate 6-4. The upper edge of the partition plate 6-4 and the upper edges of both sides of the duct profile 6 are provided with a bent connection portion. The connection portion 6-5 is attached to the lower surface of the roof 1 and is riveted and connected to the lower surface of the roof 1.

[0064] The lower surface of the duct profile 6 is symmetrically provided with two groups of bearing parts 6-6 bent at right angles, one group of bearing parts 6-6 is bent inwardly, and the other group of bearing parts 6-6 is bent outwardly, and the spacing between the bearing parts 6-6 bent inwardly is greater than the spacing between the bearing parts 6-6 bent outwardly.

[0065] After the air duct structure is riveted to the roof, a sealed channel cavity is formed to meet the requirements of vehicle ventilation and equipment pipeline passage. After the roof ventilation duct 7 is consolidated with the structure of the roof 1, it can participate in the load-bearing of the vehicle body as an integral structure, thereby improving the strength and rigidity of the vehicle body and meeting the technical requirements of vehicle body strength, rigidity and lightweight.

[0066] The roof structure cavity can be filled with corresponding functional materials according to the needs of structural heat insulation, vibration isolation, noise reduction, etc., so as to improve the functional indicators of the structure.

[0067] Please refer to Figure 6 , Figure 7 , Figure 6 It is a schematic diagram of the cross-sectional structure of the side roof; Figure 7 Schematic diagram of the cross-sectional structure of the side wall.

[0068] As shown in the figure, the double-layer pultruded profile of the side roof 3 mainly includes a first side roof profile 3-1 and a second side roof profile 3-2. The first side roof profile 3-1 and the second side roof profile 3-2 are bonded and connected by a plug-in joint using self-expanding adhesive. The inner cavity of the profile is mainly designed to be a trapezoidal cavity and a triangular cavity according to the strength and installation interface requirements, and the plug-in joint position should be set in the low stress area of ​​the structure.

[0069] The two sides of the side roof 3 are designed as lap joints. The position and structure of the upper lap joint match the lap joint of the roof 1, meeting the assembly and installation requirements of the roof and air-conditioning seat. The position of the lower lap joint is the same as the window opening position, and the structure meets the glass installation and sealing requirements.

[0070] The structural cavity of the side roof 3 can be filled with corresponding functional materials according to the needs of structural heat insulation, vibration isolation, noise reduction, etc., so as to improve the functional indicators of the structure.

[0071] The side wall 4 is composed of four composite pultruded profiles bonded together by two plug-in joints and one lap joint using self-expanding adhesive. The inner cavity of the profile is mainly designed into a triangular cavity and a trapezoidal cavity according to the strength and installation interface requirements, and the plug-in joint position should be set in the low stress area of ​​the structure.

[0072] The double-layer pultruded profiles of the side wall 4 mainly include a first side wall profile 4-1, a second side wall profile 4-2, a third side wall profile 4-3 and a fourth side wall profile 4-4. The first side wall profile 4-1 is connected to the second side wall profile 4-2 by a plug-in joint, the second side wall profile 4-2 and the third side wall profile 4-3 are connected by a lap joint, and the third side wall profile 4-3 and the fourth side wall profile 4-4 are connected by a plug-in joint.

[0073] The upper end of the side wall 4 is designed as a lap joint, and the position and structure match the lap joint of the side roof 3 to meet the assembly requirements of the side roof 3.

[0074] Similarly, the side wall structure cavity can be filled with corresponding functional materials according to the needs of structural heat insulation, vibration isolation, noise reduction, etc., so as to improve the functional indicators of the structure.

[0075] Please refer to Figure 8 , Figure 8 for Figure 1 BB view of the spliced ​​body shown.

[0076] As shown in the figure, the lap joint position of the upper edge of the side roof 3 is the same as the position of the roof air conditioner mounting seat, its lap joint structure is consistent with the roof equipment mounting seat joint, and the lap joint position of the lower edge of the side roof 3 is the same as the upper edge of the window opening.

[0077] The connection points between the two sides of the roof 1 and the side roof 3 are designed as lap joints to meet the installation requirements when the roof is assembled to the vehicle body. The position of the lap joint is the same as the position of the roof air-conditioning mounting seat, and the lap joint structure is consistent with the joints of the roof equipment mounting seat such as the air-conditioning, to meet the technical requirements for the layout and position adjustment of the air-conditioning equipment, as well as the technical requirements for the sealing of the vehicle body structure.

[0078] The structures of plug-in joints, lap joints and push-on joints are further described in detail below:

[0079] Please refer to Figure 5 , Figure 5 for Figure 4 A partial enlarged schematic diagram of site II is shown in FIG.

[0080] As shown in the figure, the plug-in joint between the first roof profile 1-1 and the second roof profile 1-2 consists of a male plug 1-4 and a female plug 1-5. The female plug 1-5 is formed on the left edge of the first roof profile 1-1, and the male plug 1-4 is formed on the right edge of the second roof profile 1-2. The female plug 1-5 has an outer edge and an inner edge of the socket formed by extending the outer plate and the inner plate. A step portion that can be engaged with the outer edge of the socket is formed on the outer plate of the male plug 1-4, and a step portion that can be engaged with the inner edge of the socket is formed on the inner plate of the male plug 1-4, so as to ensure a smooth transition between the inner surface and the outer edge of the two profiles after plugging.

[0081] In order to further improve the reliability of the connection, a plurality of grooves 1-6 or recesses parallel to the axial direction are formed on the end surface of the male plug 1-4, the outer surface of the outer plate and the inner plate. Of course, grooves 1-6 or recesses can also be formed on the inner end surface of the female plug 1-5, the inner surface of the outer plate and the inner plate.

[0082] The plug-in connectors of the side roof 3, the side wall 4 and the bottom frame 2 are similar in structure to the plug-in connectors of the roof 1, and will not be described one by one here.

[0083] Please refer to Fig. 9 , Fig. 9 for Figure 8 A partial enlarged schematic diagram of site III is shown in FIG.

[0084] As shown in the figure, the lap joint between the side roof 3 and the side wall 4 is mainly composed of a first lap end 3-3 formed at the lower edge of the second side roof profile 3-2 and a second lap end 4-5 formed at the upper edge of the first side wall profile 4-1. The outer side of the first lap end 3-3 has a first lap edge formed by extending the outer panel, and the inner side of the second lap end 4-5 has a second lap edge formed by extending the inner panel. The outer side of the second lap end is formed with a step portion that can be engaged with the first lap edge, and the inner side of the first lap end is formed with a step portion that can be engaged with the second lap edge.

[0085] In order to further improve the reliability of the connection, a plurality of grooves 1-6 or concave positions parallel to the axial direction are formed on the end face, the inner side surface and the inner surface of the first overlapping edge of the first overlapping end 3-3. Of course, grooves 1-6 or concave positions can also be formed on the end face, the outer side surface and the inner surface of the second overlapping edge of the second overlapping end 4-5.

[0086] The lap joint between the side roof 3 and the roof 1, and the lap joint of the side wall 4 itself are similar in structure to the above-mentioned lap joints, and will not be described one by one here.

[0087] Please refer to Figure 3 , Figure 3 for Figure 2 A partial enlarged schematic diagram of site I shown in FIG.

[0088] As shown in the figure, the push-joint between the side wall 4 and the base frame 2 is mainly composed of a push-joint groove formed on the upper surface of the edge of the base frame 2 and a push-joint 5-1 formed at the bottom of the side wall connector 5. The side wall connector 5 is also a double-layer pultruded profile of carbon fiber composite material. The top of the side wall 4 is connected to the side wall 4 through a plug-in joint, and the interior adopts a combination of a triangular cavity and a rectangular cavity to meet the strength requirements of the side wall root connection structure and the profile pultrusion process requirements.

[0089] The push-joint groove of the base frame 2 is composed of a first push-joint plate 2-8 and a second push-joint plate 2-9, wherein the first push-joint plate 2-8 is located on the outside, and the second push-joint plate 2-9 is located on the inside, and the distance between the first push-joint plate 2-8 and the second push-joint plate 2-9 gradually increases from top to bottom, forming a trapezoidal push-joint groove with an opening upward, and the push-joint joint 5-1 of the side wall connector 5 is in a trapezoidal shape in cross section that can be pushed into the push-joint groove from the end.

[0090] In order to further improve the reliability of the connection, the inner surface of the push-joint groove or the outer surface of the push-joint joint 5 - 1 may be processed with multiple grooves 1 - 6 or concave positions parallel to the axial direction.

[0091] Since the side wall connector 5 has a trapezoidal cross section and cannot be plugged into the push-in groove of the base frame 2, a push-in tool can be used to push the side wall connector 5 from the end along the axial direction as a whole and then bond it during assembly.

[0092] Please refer to Fig.10 , Fig.11 , Fig.10 for Figure 1 CC view of the spliced ​​body shown; Fig.11 for Fig.10 Schematic diagram of the cross-sectional structure of the underframe where the door is located is shown in FIG.

[0093] As shown in the figure, the second side roof profile 3 - 2 of the side roof 3 is provided with a corresponding door installation rib 8 at the upper edge of the door according to the door assembly requirements to meet the door installation and sealing requirements.

[0094] The height of the two lap joints of the side wall 4 is consistent with the height of the vehicle window, and the structure meets the requirements for window glass installation. At the vehicle window, only two side wall profiles (i.e., the second side wall profile 4-2 and the third side wall profile 4-3) need to be disconnected. The disconnection size is consistent with the length of the vehicle window to meet the technical requirements for the window opening, reduce the product opening processing steps, and improve production efficiency and quality.

[0095] The chassis 2 is composed of seven composite pultruded profiles bonded together by six plug-in joints using self-expanding adhesive. The inner cavity of the profile is mainly designed into a triangular cavity and a trapezoidal cavity according to the strength and installation interface requirements, and the plug-in joints are located in the low stress area of ​​the structure.

[0096] Specifically, the double-layer pultruded profiles of the chassis 2 mainly include the first chassis profile 2-1 located in the middle and the second chassis profile 2-2, the third chassis-shaped groove 2-3, the fourth chassis profile 2-4, the fifth chassis profile 2-5, the sixth chassis-shaped groove 2-6, and the seventh chassis profile 2-7 symmetrically distributed on both sides. The seven double-layer pultruded profiles are connected by six plug-in joints, and the second chassis profile 2-2 and the seventh chassis profile 2-7 are further connected to the side wall 4 through the side wall connector 5 through the push-joint joint 5-1. If the side wall connector 5-1 is also regarded as a component of the chassis 2, it is equivalent to the chassis 2 having nine composite pultruded profiles.

[0097] The height of the first chassis profile 2-1 is higher than the second chassis profile 2-2 and the fifth chassis profile 2-5 on both sides. The second chassis profile 2-2 and the fifth chassis profile 2-5 have a bending portion extending obliquely upward to transitionally connect with the first chassis profile 2-1. For the second chassis profile 2-2, the thickness of its inner side is greater than the thickness of its outer side. The structure of the fifth chassis profile 2-5 is mirror-symmetrical to the second chassis profile 2-2. For the fourth chassis profile 2-4, the thickness of its outer side is greater than the thickness of its inner side. The structure of the seventh chassis profile 2-7 is mirror-symmetrical to the fourth chassis profile 2-4.

[0098] The upper parts of the fourth chassis profile 2-4 and the seventh chassis profile 2-7 are designed as lap joints. The socket structure not only meets the push-joint installation requirements, but also can remove the socket flange through mechanical processing at the body door installation to form a platform step 2-10 to meet the door mechanism installation and sealing requirements.

[0099] Similarly, the structural cavity of the base frame 2 can be filled with corresponding functional materials according to the needs of structural heat insulation, vibration isolation, noise reduction, etc., to improve the functional indicators of the structure and make its functional effect better than a single sandwich structure.

[0100] The above composite material vehicle body structure is mainly divided into a roof 1, a side roof 3, a side wall 4, a chassis 2 and other parts. Each part can be assembled separately and then assembled as a whole to form a complete vehicle structure; the roof 1, the side roof 3, and the side wall 4 can also be assembled into the upper part of the vehicle, and then assembled with the chassis 2 to form the complete vehicle structure; the assembly and manufacturing method of the vehicle body structure is flexible, and the assembly method can be flexibly selected according to conditions such as order quantity, assembly equipment, and construction site.

[0101] In at least one embodiment, the upper edge and the lower edge of the side roof 3 can be respectively connected to the edge of the roof 1 and the upper edge of the side wall through lap joints with opposite lap directions. The connection strength can be further improved by setting lap joints with opposite lap directions.

[0102] In some other embodiments, in addition to using carbon fiber composite materials, the double-layer pultruded profile can also be a metal profile, such as an aluminum alloy profile. If it is an aluminum alloy profile, then according to the material properties, adjacent double-layer pultruded profiles are connected by welding at the plug joints, lap joints and push joints, and the rest of the structure is basically the same as the above embodiment, please refer to the above.

[0103] The above embodiments are only preferred solutions of the present invention, and are not limited thereto. On this basis, targeted adjustments can be made according to actual needs to obtain different implementation methods. For example, the inner cavity shapes of the roof 1, the side roof 3, the side wall 4 and the bottom frame 2 are designed to be other forms of a combination of a triangular cavity, a trapezoidal cavity, and a rectangular cavity, or the number of profiles of the roof 1, the side roof 3, the side wall 4 and the bottom frame 2 is further increased or decreased, etc. Since there are many possible implementation methods, they will not be described one by one here.

[0104] The present invention provides a double-layer multi-cavity spliced ​​car body structure, utilizes the characteristics of high strength, high rigidity and light weight of multi-cavity profiles, and assembles them by overlapping, plugging, pushing and other methods. It uses self-expanding adhesive bonding or welding to solve the problems of heavy weight, low strength and easy corrosion of existing metal car bodies of railway vehicles. At the same time, it also solves the problems of many blocks, poor sealing, poor weight reduction effect and low production efficiency of existing composite material car bodies. During the production process, the product assembly method can be flexibly adjusted according to the actual production resources of the product.

[0105] In addition to the above-mentioned spliced ​​car body, the present invention also provides a rail vehicle, including a car body, windows, doors and a roof air-conditioning device arranged on the car body, wherein the car body is the spliced ​​car body described above. Regarding other structures of the rail vehicle, please refer to the prior art, which will not be repeated in this article.

[0106] The above is a detailed introduction to the spliced ​​car body and rail vehicle provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A spliced ​​vehicle body, comprising a roof, a chassis, and side roofs and side walls on both sides; the upper edge of the side roof is connected to the edge of the roof, the upper edge of the side wall is connected to the lower edge of the side roof, and the lower edge of the side wall is connected to the edge of the chassis; the roof, chassis, side roof and side wall are respectively formed by splicing double-layer pultruded profiles of carbon fiber composite materials, and the double-layer pultruded profiles include an outer plate, an inner plate and a cavity separated by ribs in the sandwich between the outer plate and the inner plate; characterized in that, The upper edge and lower edge of the side roof are respectively connected to the edge of the roof and the upper edge of the side wall through lap joints, and the lower edge of the side wall is connected to the edge of the chassis through a side wall connector; the side wall connector is a single double-layer pultruded profile, the upper edge of which is connected to the lower edge of the side wall through a plug joint, and the lower edge of which is connected to the edge of the chassis through a push joint; the push joint includes a push groove formed on the upper surface of the chassis edge and a push joint formed on the lower edge of the side wall connector; the push groove includes a first push plate and a second push plate, the first push plate is located on the outside, and the The second pushing plate is located on the inner side, and the distance between the first pushing plate and the second pushing plate gradually increases from top to bottom, and a trapezoidal pushing groove opening upward is formed between the two; the pushing joint of the side wall connecting piece is in a trapezoidal shape in cross section that can be pushed into the pushing groove from the end; the double-layer pultruded profile of the side wall includes a first side wall profile, a second side wall profile, a third side wall profile and a fourth side wall profile, the first side wall profile is connected to the second side wall profile by a plug-in joint, the second side wall profile and the third side wall profile are connected by a lap joint, and the third side wall profile and the fourth side wall profile are connected by a plug-in joint.

2. The spliced ​​vehicle body according to claim 1, characterized in that: The lap joint includes a first lap end and a second lap end respectively formed on the edges of two connected double-layer pultruded profiles, the outer side of the first lap end has a first lap edge formed by extending the outer plate, the inner side of the second lap end has a second lap edge formed by extending the inner plate, the outer side of the second lap end is formed with a step portion that can be embedded with the first lap edge, and the inner side of the first lap end is formed with a step portion that can be embedded with the second lap edge.

3. The spliced ​​vehicle body according to claim 2, characterized in that: The end face, inner side surface and inner surface of the first overlapping edge of the first overlapping end are formed with grooves or recesses; or the end face, outer side surface and inner surface of the second overlapping edge of the second overlapping end are formed with grooves or recesses.

4. The spliced ​​vehicle body according to claim 1, characterized in that: The plug connector includes a male plug and a female plug respectively formed on the edges of two connected double-layer pultruded profiles, the female plug having an outer edge and an inner edge of a socket formed by extending an outer plate and an inner plate, a step portion capable of being engaged with the outer edge of the socket being formed on the outer plate of the male plug, and a step portion capable of being engaged with the inner edge of the socket being formed on the inner plate of the male plug.

5. The spliced ​​vehicle body according to claim 4, characterized in that: The end surface of the male plug, the outer surface of the outer plate and the inner plate are formed with grooves or recesses; or the inner end surface of the female plug, the outer plate and the inner surface of the inner plate are formed with grooves or recesses.

6. The spliced ​​vehicle body according to claim 1, characterized in that: The inner surface of the push-joint groove or the outer surface of the push-joint joint is formed with a groove or a concave position.

7. The spliced ​​vehicle body according to claim 1, characterized in that: The upper edge and the lower edge of the side roof are respectively connected to the edge of the roof and the upper edge of the side wall through overlapping joints with opposite overlapping directions.

8. The spliced ​​vehicle body according to claim 1, characterized in that: In cross section, the distance between the outer panel and the inner panel of the double-layer pultruded profile of the side roof first gradually increases and then gradually decreases from the upper edge to the lower edge; in cross section, the distance between the outer panel and the inner panel of the double-layer pultruded profile of the side wall gradually decreases and then gradually increases from the upper edge to the lower edge line.

9. The spliced ​​vehicle body according to claim 1, characterized in that: It further comprises an air duct profile connected to the bottom of the roof, wherein the air duct profile is used to form a sealed roof ventilation air duct.

10. The spliced ​​vehicle body according to claim 9, characterized in that: The interior of the air duct profile is provided with an axial channel which is open upwards, and the axial channel forms the roof ventilation air duct together with the lower surface of the double-layer pultruded profile of the roof.

11. The spliced ​​vehicle body according to claim 10, characterized in that: The axial channel includes a main channel located at a central position and auxiliary channels located at both sides of the main channel.

12. The spliced ​​vehicle body according to claim 11, characterized in that: The secondary channel includes a first secondary channel located outside the main channel and a second secondary channel located outside the first secondary channel; the main channel is generally rectangular, the first secondary channel is generally trapezoidal, and the second secondary channel is generally triangular.

13. The spliced ​​vehicle body according to claim 10, characterized in that: The axial channel of the air duct profile is divided by a vertical partition plate, and the upper edge of the partition plate and the upper edges of both sides of the air duct profile are provided with a bent connecting portion, which is attached to the lower surface of the roof and riveted to the lower surface of the roof.

14. The spliced ​​vehicle body according to claim 11, characterized in that: The air duct profile includes a left profile and a right profile that are symmetrical on both sides and a connecting plate located in the middle. The connecting plate forms the bottom of the main channel, and its left and right edges respectively overlap and connect the extended edges of the bottom of the left and right profiles.

15. The spliced ​​vehicle body according to claim 1, characterized in that: The double-layer pultruded profile of the roof includes a first roof profile located in the middle and a second roof profile and a third roof profile that are symmetrical to each other. The first roof profile is connected to the second roof profile and the third roof profile through plug-in connectors.

16. The spliced ​​vehicle body according to claim 1, characterized in that: The double-layer pultruded profile of the side roof comprises a first side roof profile and a second side roof profile, wherein the first side roof profile and the second side roof profile are connected via a plug-in joint.

17. The spliced ​​vehicle body according to claim 16, characterized in that: The lap joint position of the upper edge of the side roof is the same as the position of the roof air conditioner mounting seat, and its lap joint structure is consistent with the roof equipment mounting seat joint; the lap joint position of the lower edge of the side roof is the same as the upper edge of the window opening.

18. The spliced ​​vehicle body according to claim 17, characterized in that: The side roof is provided with a mounting rib plate for assembling the door at the upper edge of the door.

19. The spliced ​​vehicle body according to claim 1, characterized in that: The height position of the lap joint between the second side wall profile and the third side wall profile is consistent with the height of the lower edge of the vehicle window. The first side wall profile and the second side wall profile are disconnected at the vehicle body window, and the disconnection size is consistent with the length of the vehicle window to form a window opening.

20. The spliced ​​vehicle body according to claim 1, characterized in that: The double-layer pultruded profile of the chassis includes a first chassis profile located in the middle and a second chassis profile, a third chassis profile, a fourth chassis profile, a fifth chassis profile, a sixth chassis profile, and a seventh chassis profile symmetrically distributed on both sides. The seven double-layer pultruded profiles are connected by six plug-in joints.

21. The spliced ​​vehicle body according to claim 20, characterized in that: The height of the first chassis profile is higher than the second chassis profile and the fifth chassis profile on both sides, and the second chassis profile and the fifth chassis profile have bending parts extending obliquely upward to transitionally connect with the first chassis profile.

22. The spliced ​​vehicle body according to any one of claims 1 to 21, characterized in that: The connection between the side wall and the bottom frame is provided with a platform step formed by removing the flange of the socket at the door position to install the door mechanism.

23. The spliced ​​vehicle body according to any one of claims 1 to 21, characterized in that: The cavity of the double-layer pultruded profile includes a triangular cavity, a trapezoidal cavity, a rectangular cavity and a combination thereof.

24. The spliced ​​vehicle body according to any one of claims 1 to 21, characterized in that: The cavity of the double-layer pultruded profile of the roof, the bottom frame, the side roof or the side wall is filled with heat insulation material, vibration isolation material or noise reduction material.

25. The spliced ​​vehicle body according to any one of claims 1 to 21, characterized in that: The adjacent double-layer pultruded profiles are connected at the joints by adhesive.

26. A rail vehicle, comprising a vehicle body, windows and doors arranged on the vehicle body, and a roof air conditioning device, characterized in that: The vehicle body is a spliced ​​vehicle body as described in any one of claims 1 to 25 above.

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