Underframe and railway vehicle

Abstract

Embodiments of the present application provide an underframe and a railway vehicle. The underframe comprises an underframe body, side beams, and a plurality of cross beams, wherein the side beams are arranged on two sides of the underframe body in a transverse direction, each of the cross beams is connected to the underframe body, the cross beams are arranged in sequence at intervals in a longitudinal direction of the underframe body, two ends of each of the cross beams are respectively connected to the side beams at the two ends, and the cross beams are configured to connect to a suspended apparatus. The underframe of the present application may be configured without a longitudinal beam, with the cross beams serving as a main load-bearing structure, wherein the cross beams are directly connected to the side beams at two ends and are connected to the suspended apparatus. The underframe of the present application meets lightweight design requirements. The underframe is lightweight and simple while providing high strength and rigidity, good stability, and satisfying the requirement of suspending a heavy apparatus.

Description

A chassis and a rail vehicle TECHNICAL FIELD

[0001] The present application relates to the technical field of rail vehicles, and in particular to a chassis and a rail vehicle. BACKGROUND

[0002] At present, the speed of the high-speed motor train unit put into use in China has reached 350km / h. It is an urgent need to push the world leader in high-speed rail to create a 400km / h motor train unit with higher speed, higher safety, more environmental protection, more energy saving, and more intelligence. The key top-level technical indicators are composed of running speed, braking distance, running energy consumption, and noise control. The increase of speed will lead to more complex stress states such as the increase of aerodynamic load, vibration load, connection load between cars, and connection load between car body and bogie. In order to obtain good braking distance, excellent running energy consumption, and reduce the damage of wheel-rail energy consumption to the line, the car body needs more deep-level lightweight design under the premise of speed improvement.

[0003] Based on the structure characteristics of the car body, the lightweight technology of the car body focuses on the chassis. The main purpose of the chassis underneath is to hoist equipment. An excellent hoisting structure can not only ensure the hoisting requirement of the equipment, but also increase the stiffness of the car body, and maximize the lightweight requirement. Therefore, the design of the hoisting structure is very important in the design of the chassis.

[0004] In the related technology, the chassis includes a cross beam, a longitudinal beam, a side beam, and a small cross beam. Two longitudinal beams are arranged at intervals, and the two longitudinal beams are connected to two side beams respectively. Each cross beam and small cross beam is located between the two side beams and connected to the corresponding longitudinal beam at both ends. The longitudinal beam is provided with a hanging hole which can be used to connect the hoisting equipment. The chassis is designed in the mode of hoisting the cross beam by the longitudinal beam. The longitudinal beam and the side beam can well transmit external force, but the frame has a large cross-sectional area, which causes the whole frame to be heavy and is not conducive to the lightweight design of the car body. If the longitudinal beam is short, the weld will bear a large torque and fatigue failure will occur. If the longitudinal beam is long, it will increase the weight and is not conducive to the lightweight of the whole vehicle. The longitudinal beam is designed in close contact with the side beam, and the distance between the two longitudinal beams is large, which will inevitably cause the frame of the installed equipment at this position to be large, indirectly causing the weight of the whole vehicle to increase.

[0005] SUMMARY

[0006] The present application provides a chassis and a rail vehicle to solve the problem of heavy chassis which is not conducive to the lightweight design of the car body.

[0007] According to a first aspect of the present application, a chassis is provided, comprising:

[0008] a chassis body;

[0009] a side beam arranged on both sides of the chassis body in the transverse direction;

[0010] a plurality of crossbeams, each of the crossbeams being connected to the chassis body, each of the crossbeams being arranged in sequence along the longitudinal direction of the chassis body, and two ends of each of the crossbeams being connected to the side beams at the two ends, respectively;

[0011] The crossbeams are used for connecting hoisting equipment.

[0012] Optionally, the chassis comprises a sliding block.

[0013] The crossbeams have a lumen, a connecting hole and a mounting port, the connecting hole and the mounting port being arranged in sequence along the length direction of the crossbeams, and the connecting hole and the mounting port being in communication with the lumen.

[0014] The sliding block is loaded into the lumen through the mounting port, and the sliding block is slidable to one side of the connecting hole.

[0015] A connecting piece for connecting hoisting equipment is connectable to the sliding block through the connecting hole.

[0016] Optionally, the crossbeams have a top plate, a bottom plate and two side plates.

[0017] The top plate is connected to the chassis body, the bottom plate is arranged in sequence with the top plate, and the two side plates are located at the two sides of the bottom plate along the width direction and are connected to the top plate and the bottom plate, respectively.

[0018] The top plate, the bottom plate and the side plates enclose the lumen.

[0019] The connecting hole and the mounting port are formed on the bottom plate.

[0020] Optionally, a guide rail is arranged on the bottom plate.

[0021] The guide rail is located inside the lumen.

[0022] A sliding groove is arranged on the sliding block, and the sliding block is slidably connected to the guide rail through the sliding groove.

[0023] Optionally, the thickness of the bottom plate is greater than the thicknesses of the side plates and the top plate.

[0024] Optionally, the width of the top plate is greater than the width of the bottom plate.

[0025] Optionally, the top plate has extension edges protruding from the side plates on both sides.

[0026] In the length direction of the crossbeams, the extension edges have a plurality of disconnected portions.

[0027] Optionally, the chassis comprises a crossbeam assembly, and the crossbeam assembly is connected to the chassis body.

[0028] The crossbeam assembly is connected to each of the crossbeams and the side beams, respectively.

[0029] Optionally, the beam assembly comprises a plurality of longitudinal segments and two inclined segments, and a spacing region is arranged between two adjacent longitudinal segments;

[0030] Each of the cross beams passes through the spacing region between two adjacent longitudinal segments, and the cross beam connects the two adjacent longitudinal segments;

[0031] The two inclined segments are arranged at two ends of each longitudinal segment, and one end of each of the two inclined segments is connected to the longitudinal segment at the end, and the other end is connected to the side beam.

[0032] Optionally, the chassis comprises a plurality of reinforcing plates;

[0033] The beam assembly, the cross beam and the side beam enclose a plurality of cavities;

[0034] Each of the reinforcing plates is arranged in a corresponding cavity, and the reinforcing plate is connected to the corresponding cross beam, beam assembly and side beam.

[0035] Optionally, the reinforcing plate is provided with a notch.

[0036] According to a second aspect of the present application, a rail vehicle is provided, comprising:

[0037] The chassis described above;

[0038] A hoisting device connected to the cross beam on the chassis.

[0039] By adopting the above technical solution, the present application has the following beneficial effects:

[0040] The chassis of the present application can not be provided with longitudinal beams, and the cross beam is the main load-bearing structure, and the cross beam is directly connected to the side beam at two ends, and the hoisting device is connected through the cross beam. The chassis of the present application meets the lightweight design requirement, and is light and simple and has high strength and rigidity, good stability, and meets the requirement of hoisting heavy equipment. BRIEF DESCRIPTION OF DRAWINGS

[0041] The accompanying drawings, which are included to provide a further understanding of the present application, constitute a part of the present application, and the illustrative embodiments of the present application and their descriptions serve to explain the present application and do not constitute improper limitations on the present application. In the drawings:

[0042] FIG. 1 shows a side view of a chassis on which a hoisting device is installed according to an embodiment of the present application;

[0043] FIG. 2 shows a bottom view of the chassis according to an embodiment of the present application;

[0044] FIG. 3 shows a partial structure view of the chassis according to an embodiment of the present application;

[0045] Fig. 4 shows a cross-sectional view of a crossbeam of the chassis according to an embodiment of the present application;

[0046] Fig. 5 shows a partial structural view of a crossbeam of the chassis according to an embodiment of the present application.

[0047] Reference signs: 100, chassis; 1, chassis body; 2, side beam; 3, crossbeam; 31, top plate; 311, extension side; 3111, disconnection part; 32, side plate; 33, bottom plate; 331, connecting hole; 332, mounting port; 333, guide rail; 4, crossbeam assembly; 41, longitudinal section; 42, inclined section; 43, reinforcing plate; 431, notch part; 200, hoisting equipment. DETAILED DESCRIPTION

[0048] In order to make the technical solutions and advantages of the embodiments of the present application clearer, the exemplary embodiments of the present application are further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0049] Referring to Figs. 1-5, the present application provides a chassis 100, which comprises a chassis body 1, a side beam 2 and a plurality of crossbeams 3. The side beam 2 is arranged on both sides of the chassis body 1 along the transverse direction, each crossbeam 3 is connected to the chassis body 1, each crossbeam 3 is arranged in sequence along the longitudinal direction of the chassis body 1, and the two ends of the crossbeam 3 are connected to the side beams 2 at both ends. Among them, the crossbeam 3 is used to connect the hoisting equipment 200.

[0050] The chassis 100 of the present application can not be provided with longitudinal beams, and the crossbeam 3 is the main load-bearing structure. The present application connects the hoisting equipment 200 through the crossbeam 3, and the crossbeam 3 is directly connected to the side beam 2 at both ends, which has no disconnection in the integrated rigidity, and is conducive to improving the overall fatigue resistance of the structure. The chassis 100 of the present application meets the lightweight design requirement, and has the advantages of lightness, simplicity, high strength and rigidity, good stability, good fatigue resistance, and meets the requirement of hoisting heavy equipment.

[0051] In some possible embodiments, the base frame 100 comprises a sliding block (not shown), the cross beam 3 has a lumen, a connecting hole 331 and a mounting port 332, the connecting hole 331 and the mounting port 332 are sequentially arranged along the length direction of the cross beam 3, the connecting hole 331 and the mounting port 332 both communicate with the lumen, the sliding block is installed in the lumen through the mounting port 332, the sliding block can slide to one side of the connecting hole 331, and a connecting piece of the hoisting device 200 can pass through the connecting hole 331 and be connected to the sliding block. The mounting port 332 has a larger opening area than the connecting hole 331, the sliding block can be smoothly installed in the lumen through the opening, and the sliding block can be conveniently connected with the hoisting device 200 by sliding to one side of the connecting hole 331. The connecting piece of the hoisting device 200 can be a bolt, and the bolt can be threadedly connected to a threaded hole on the sliding block through the connecting hole 331 at the end.

[0052] In some possible embodiments, referring to FIG. 4, the cross beam 3 has a top plate 31, a bottom plate 33 and two side plates 32, the top plate 31 is connected to the base frame body 1, the bottom plate 33 is arranged in a spaced manner with the top plate 31, the two side plates 32 are located on both sides of the bottom plate 33 along the width direction, and the side plates 32 are respectively connected to the top plate 31 and the bottom plate 33, the top plate 31, the bottom plate and the side plates 32 enclose the lumen, and the connecting hole 331 and the mounting port 332 are arranged on the bottom plate 33. The connecting hole 331 and the mounting port 332 arranged on the bottom plate 33 can facilitate the disassembly and assembly of the sliding block and the connection between the hoisting device 200 and the sliding block.

[0053] In some possible embodiments, referring to FIG. 4, the bottom plate 33 is provided with a guide rail 333 inside the lumen, the sliding block is provided with a sliding groove, and the sliding block is slidably connected to the guide rail 333 through the sliding groove. The guide rail 333 can be located at a middle position of the bottom plate 33 along the width direction, and has a guiding effect on the sliding block, so as to limit the movement track of the sliding block. When the sliding block moves to one side of the connecting hole 331 along the guide rail 333, the threaded groove on the sliding block can be directly opposite to the connecting hole 331.

[0054] In some possible embodiments, the thickness of the bottom plate 33 is greater than those of the side plates 32 and the top plate 31. For example, the thickness of the bottom plate 33 can be 12 mm, the bottom plate 33 is thickened and reinforced, is not easy to deform, and can meet the hoisting load requirement. The guide rail 333 can be conveniently arranged on the inner side of the thickened bottom plate 33, and the protruding design of the guide rail 333 further enhances the structural strength of the bottom plate 33.

[0055] In some possible embodiments, referring to FIG. 4, the width of the top plate 31 is greater than the width of the bottom plate 33. The top plate 31 is used to connect the chassis body 1, and the width of the top plate 31 is greater than the width of the bottom plate 33, which is to increase the contact area of the cross beam 3 and the chassis body 1, and to improve the stability and strength of the connection structure of the cross beam 3 and the chassis body 1. In alternative embodiments, the width of the bottom plate 33 can be 140 mm, and the width of the top plate 31 can be 170 mm.

[0056] Both side plates 32 are connected to the top plate 31 perpendicularly, and the top plate 31 has an extension edge 311 protruding from each side plate 32. The extension edge 311 has a plurality of discontinuous portions 3111 in the length direction of the cross beam 3. The discontinuous portions 3111 are beneficial for the design of the weld, for example, in the design of the segment welding process, the discontinuous portions 3111 are the segment welding positions, i.e., the positions where the welding is discontinuous, and the width of the extension edge 311 can be 15 mm. The unique design of the cross section of the cross beam 3 in the present application not only increases the contact area with the chassis body 1 but also ensures the lightweight requirement.

[0057] In some possible embodiments, the chassis 100 includes a cross beam assembly 4 connected to the bottom plate 33 body, and the cross beam assembly 4 is connected to each of the cross beams 3 and the side beams 2. The design of the cross beam assembly 4 can connect each of the cross beams 3 and the side beams 2, further enhancing the structural strength of the chassis 100 and ensuring the stability of the structure.

[0058] In some possible embodiments, referring to FIGS. 2 and 3, the cross beam assembly 4 includes a plurality of longitudinal segments 41 and two inclined segments 42. Each of the longitudinal segments 41 has a spacing region between two adjacent longitudinal segments 41, each of the cross beams 3 penetrates the spacing region between the two adjacent longitudinal segments 41, and the cross beam 3 is connected to the longitudinal segments 41 on both sides. The two inclined segments 42 are located at both ends of each longitudinal segment 41, and each of the two inclined segments 42 is connected to the longitudinal segment 41 at one end and to the side beam 2 at the other end.

[0059] Each longitudinal segment 41 extends in the longitudinal direction of the chassis 100 body, and plays a role in connecting each cross beam 3 and enhancing the structural rigidity, thereby ensuring the stability of the structure. The two inclined segments 42 are connected to the side beams 2 of the chassis 100, ensuring that the longitudinal force directly reaches the side beams 2, which is beneficial for force transmission.

[0060] In some possible embodiments, referring to FIG. 3, the underframe 100 comprises a plurality of reinforcing plates 43, the beam assembly 4, the cross beam 3 and the side beam 2 enclose a plurality of cavities, each reinforcing plate 43 is arranged in a corresponding cavity, and the reinforcing plate 43 is connected to the corresponding cross beam 3, beam assembly 4 and side beam 2. The design of the reinforcing plate 43 further enhances the connection structure strength of each cross beam 3 and beam assembly 4, and increases the stability of the structure. The positions of each longitudinal section 41 and inclined section 42 of the beam assembly 4 can be adjusted according to the hoisting position of the equipment to adapt to different hoisting structure requirements of the equipment.

[0061] In the embodiments of the present application, the cross beam 3, beam assembly 4 and reinforcing plate 43 can be connected to form an overall structure first, and then the hole positions are processed uniformly, which is beneficial to accurately determine the hole positions and realize accurate assembly of the hoisting equipment 200.

[0062] In some possible embodiments, referring to FIG. 3, the reinforcing plate 43 is provided with a notch portion 431. The design of the notch portion 431 has the effect of avoiding stress concentration. The notch portion 431 can be arranged on the corner of the reinforcing plate 43 or on the side between two corners.

[0063] Referring to FIGS. 1 to 3, the present application also provides a railway vehicle, comprising: a hoisting equipment 200 and the above-mentioned underframe 100. The hoisting equipment 200 is connected to the cross beam 3 on the underframe 100, and the specific connection relationship between the hoisting equipment 200 and the cross beam 3 has been described in detail above.

[0064] The underframe 100 of the present application is designed from the perspective of lightweight, greatly reducing the structure weight, and providing a feasible technical solution for speed increase, energy saving and consumption reduction. The structure avoids the shortcomings of other schemes, has excellent mechanical properties, and provides a basic guarantee for the safe operation of the railway vehicle.

[0065] In the description of the present application, it should be understood that the positions or location relationships indicated by the terms "front", "back", "head", "tail" and the like are based on the positions or location relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as limiting the present application.

[0066] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0067] In this application, unless otherwise clearly indicated and limited, the terms "mounting", "connection" and the like should be understood broadly. For example, the connection can be direct connection or indirect connection through an intermediate medium, or internal connection of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0068] Although some optional embodiments of the present application have been described, those skilled in the art can make further changes and modifications to these embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including all optional embodiments and all changes and modifications falling within the scope of the present application.

[0069] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A chassis, characterized in that, The bottom frame body comprises: a bottom frame body; side beams arranged on both sides of the bottom frame body in the transverse direction; a plurality of cross beams, each of which is connected to the bottom frame body and arranged in sequence in the longitudinal direction of the bottom frame body, and the two ends of each cross beam are connected to the two end side beams; wherein the cross beams are used to connect hoisting equipment.

2. The undercarriage of claim 1, wherein, The cross beam comprises a sliding block. The cross beam has a lumen, a connecting hole and a mounting port; the connecting hole and the mounting port are arranged in sequence along the length direction of the cross beam, and both the connecting hole and the mounting port communicate with the lumen; The sliding block is loaded into the lumen through the mounting port, and the sliding block can slide to one side of the connecting hole; The connecting piece for connecting the hoisting equipment can be connected to the sliding block through the connecting hole.

3. The undercarriage of claim 2, wherein, The cross beam has a top plate, a bottom plate and two side plates; The top plate is connected to the bottom frame body, the bottom plate is arranged in a spaced manner with the top plate, and the two side plates are located on both sides of the bottom plate in the width direction and are connected to the top plate and the bottom plate respectively; The top plate, the bottom plate and the side plates enclose the lumen; The connecting hole and the mounting port are formed on the bottom plate.

4. The undercarriage of claim 3, wherein, The bottom plate is provided with a guide rail; The guide rail is located inside the lumen; The sliding block is provided with a sliding groove, and the sliding block is slidably connected to the guide rail through the sliding groove.

5. The undercarriage of claim 4, wherein, The thickness of the bottom plate is greater than that of the side plates and the top plate.

6. The undercarriage of claim 3, wherein, The width of the top plate is greater than that of the bottom plate.

7. The undercarriage of claim 6, wherein, The two sides of the top plate have extension edges protruding from the corresponding side plates; In the length direction of the cross beam, the extension edges have a plurality of disconnected parts.

8. The undercarriage of claim 1, wherein, The cross beam assembly is connected to the bottom frame body; The cross beam assembly is connected to each cross beam and side beam respectively.

9. The undercarriage of claim 8, wherein, The cross beam assembly comprises a plurality of longitudinal segments and two inclined segments, and each two adjacent longitudinal segments have a spacing area therebetween; Each cross beam penetrates the spacing area between each two adjacent longitudinal segments, and the cross beam connects the two side longitudinal segments; The two inclined segments are located at both ends of each longitudinal segment, and each inclined segment has one end connected to the end longitudinal segment and the other end connected to the side beam.

10. The undercarriage of claim 8, wherein, A plurality of reinforcing plates are arranged in the cavities formed by the cross beam assembly, the cross beam and the side beam. The reinforcing plate is provided with a notch. The bottom frame comprises:

11. The undercarriage of claim 10, wherein, The bottom frame of any one of claims 1-11; 12. A rail vehicle, characterized by Hoisting equipment connected to the cross beam of the bottom frame. ​ ​

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