Chassis and railway vehicle

Abstract

The invention relates to the technical field of railway vehicles, in particular to a chassis and a railway vehicle. The chassis includes a bolster assembly. The sleeper beam assembly comprises a sleeper beam, two secondary spring seats, a first traction seat and two cooling liquid pipelines. The sleeper beam comprises a bottom plate, a top plate spaced from the bottom plate, two end plates connected to the bottom plate and the top plate, and two side plates connected between the bottom plate and the top plate. A containing cavity is defined by the bottom plate, the top plate, the two end plates and the two side plates, the two end plates are arranged in the first direction in a spaced mode, the two side plates are arranged in the second direction in a spaced mode, and the first direction is perpendicular to the second direction. The two secondary spring seats are both installed in the containing cavity. The first traction base is arranged on the bottom plate and located between the two secondary spring bases in the second direction. The two cooling liquid pipelines are arranged in the containing cavity at intervals in the second direction and located between the two secondary spring seats, the two cooling liquid pipelines extend in the first direction, and the two ends of the cooling liquid pipelines penetrate through the two end plates correspondingly.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicles, and in particular to an underframe and a rail vehicle. Background Art

[0002] The bolster is a key load-bearing component in the underframe of a rail vehicle. The bolster of a traditional rail vehicle only bears vertical loads, and the weight above the secondary spring is transferred to the bogie through the secondary spring seat installed on the bolster. Usually, the bogie needs to use a traction rod to pull the rail vehicle, and the traction rod transfers the traction force to the traction seat installed under the end traction beam or side beam, thereby realizing the traction force transmission along the route of the bogie, traction rod, underframe, and rail vehicle.

[0003] In the related art, the above-mentioned traction force transmission route is relatively complicated, and the existence of the traction rod will occupy the space under the bolster for arranging the coolant pipeline for conveying the cooling liquid. Summary of the invention

[0004] The invention provides an underframe and a rail vehicle, which are used to prevent a traction rod from occupying the space of a coolant pipeline.

[0005] In a first aspect, the present invention provides a chassis, comprising a bolster assembly, wherein the bolster assembly comprises:

[0006] A bolster, the bolster comprising a bottom plate, a top plate spaced apart from the bottom plate, two end plates connected to the bottom plate and the top plate, and two side plates connected between the bottom plate and the top plate, the bottom plate, the top plate, the two end plates and the two side plates enclosing a receiving cavity, wherein the two end plates are spaced apart along a first direction, the two side plates are spaced apart along a second direction, and the first direction is perpendicular to the second direction;

[0007] Two secondary spring seats, both of which are installed in the accommodating cavity;

[0008] A first traction seat, the first traction seat is disposed on the bottom plate, and the first traction seat is located between the two second spring seats in the second direction; and

[0009] Two coolant pipes, the two coolant pipes are arranged in the accommodating cavity at intervals in the second direction and are located between the two second spring seats, the two coolant pipes both extend along the first direction, and the two ends of the coolant pipes respectively pass through the two end plates.

[0010] In some embodiments, the bolster assembly further comprises:

[0011] a first rib plate, the first rib plate being disposed in the accommodating cavity and connected between the second spring seat and the adjacent side plate; and

[0012] A second rib plate is disposed in the accommodating cavity and connected between the second spring seat and the end plate.

[0013] In some embodiments, the bolster assembly further comprises:

[0014] a first vertical plate, the first vertical plate being disposed in the accommodating cavity and connected between the two end plates, wherein the first vertical plate is disposed between each of the second spring seats and the adjacent coolant pipe; and

[0015] A third rib plate is connected between the second spring seat and the adjacent first vertical plate.

[0016] In some embodiments, the bolster assembly further comprises:

[0017] A second vertical plate, the second vertical plate is arranged in the accommodating cavity, and the second vertical plate is connected between the two end plates, wherein a first vertical plate is arranged on a side of each of the coolant pipes away from the adjacent first vertical plate;

[0018] a third vertical plate, the third vertical plate being disposed in the accommodating cavity and connected between two of the second vertical plates; and

[0019] A fourth rib plate, wherein the fourth rib plate is disposed in the accommodating cavity and connected between the first vertical plate and the adjacent second vertical plate, and the fourth rib plate is provided with an avoidance hole for the coolant pipeline to pass through.

[0020] In some embodiments, the bottom plate is provided with two first through holes, and the top plate is provided with two second through holes, and the two first through holes, the two second through holes and the two second spring seats correspond to each other one by one, wherein the bottom of the second spring seat is welded to the edge of the corresponding first through hole surrounded by the bottom plate, the top of the second spring seat protrudes the corresponding second through hole, and the side surface of the second spring seat is welded to the edge of the corresponding second through hole surrounded by the bottom plate.

[0021] In some embodiments, the secondary spring seat includes:

[0022] A surrounding plate, the bottom of the surrounding plate and the edge of the corresponding first through hole surrounded by the bottom plate are welded to form a first weld; and

[0023] A top seat, wherein the bottom of the top seat is welded to the top of the enclosure plate, and the corresponding second through hole protrudes from the top of the top seat, and the side surface of the top seat is welded to the edge of the corresponding second through hole surrounded by the bottom plate to form a second weld;

[0024] The second weld is staggered with the first weld in a third direction, the third direction is perpendicular to the first direction and the third direction is perpendicular to the second direction.

[0025] In some embodiments, the number of the bolster assemblies is two, and the two bolster assemblies are spaced apart along the first direction; the chassis further includes:

[0026] A left beam and a right beam, wherein the left beam and the right beam are spaced apart along the second direction, and the bolster is connected between the left beam and the right beam;

[0027] a front end traction beam and a rear end traction beam, wherein the front end traction beam and the rear end traction beam are spaced apart in the first direction, and the front end traction beam and the rear end traction beam are both connected between the left beam and the right beam, wherein two of the bolster beam assemblies are located between the front end traction beam and the rear end traction beam in the first direction; and

[0028] An intermediate longitudinal beam, the intermediate longitudinal beam extends along the first direction and is located between the left beam and the right beam, and the two ends of the intermediate longitudinal beam are respectively connected to the front end traction beam and the rear end traction beam, and the first traction seat is connected to the intermediate longitudinal beam through the transition plate.

[0029] In some embodiments, a transformer beam assembly is further included, wherein the transformer beam assembly is located between the two bolster beam assemblies, and the transformer beam assembly includes:

[0030] two transformer beams, the two transformer beams are connected between the left beam and the right beam, and the two transformer beams are spaced apart along the first direction; and

[0031] Four second traction seats, one second traction seat is provided at both ends of each transformer beam, wherein the type of bogies connected to the second traction seats is different from the type of bogies connected to the first traction seats.

[0032] In some embodiments, the thickness of the two ends of the transformer beam in the first direction is greater than the thickness of the middle position of the transformer beam in the first direction.

[0033] In a second aspect, the present invention further provides a rail vehicle comprising the above-mentioned underframe.

[0034] The above technical features can be combined in various suitable ways or replaced by equivalent technical features as long as the purpose of the present invention can be achieved.

[0035] The underframe and rail vehicle provided by the present invention have at least the following beneficial effects compared with the prior art:

[0036] In an underframe and a rail vehicle of the present invention, a coolant pipeline is arranged in an accommodating cavity, thereby avoiding the phenomenon of interference between the bogie and the coolant pipeline when the coolant pipeline is arranged under the bolster, and at the same time, the space under the bolster can be further saved, and more space can be further provided for the arrangement of other components of the underframe, and the flow path of the coolant is optimized. In addition, the bolster not only protects the coolant pipeline and prolongs the service life of the coolant pipeline, but also has a certain insulation effect on the coolant flowing in the coolant pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0038] Figure 1 A schematic diagram of the partial structure of the underframe provided in an embodiment of the present application at the position of the bolster assembly;

[0039] Figure 2 A schematic diagram of the structure inside the bolster provided in an embodiment of the present application;

[0040] Figure 3 A schematic structural diagram of the bottom plate of the bolster provided in an embodiment of the present application;

[0041] Figure 4 A schematic diagram of the structure of a bolster assembly provided in an embodiment of the present application;

[0042] Figure 5 A schematic diagram of the structure of a secondary spring seat provided in an embodiment of the present application;

[0043] Figure 6 A schematic diagram of the structure of the base frame provided in an embodiment of the present application;

[0044] Figure 7 A schematic diagram of the structure of a second traction seat provided in an embodiment of the present application;

[0045] Figure 8 This is a schematic structural diagram of the first traction seat provided in an embodiment of the present application.

[0046] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.

[0047] Reference numerals:

[0048] 1- bottom frame;

[0049] 11-corrugator assembly;

[0050] 111-pillar beam; 1111-bottom plate; 1111a-first through hole; 1112-top plate; 1112a-second through hole; 1113-end plate; 1114-side plate; 1115-accommodating cavity;

[0051] 112-secondary spring seat; 1121-enclosing plate; 1122-top seat; 1123-guide pin;

[0052] 113 - first traction seat; 1131 - second stop surface; 1132 - third stop surface; 1133 - second mounting hole; 1134 - third mounting hole;

[0053] 114-coolant pipe;

[0054] 1151-first rib plate; 1152-second rib plate; 1153-first vertical plate; 1154-third rib plate; 1155-second vertical plate; 1156-third vertical plate; 1157-fourth rib plate;

[0055] 12- left beam; 13- right beam;

[0056] 14-front end traction beam; 15-rear end traction beam;

[0057] 16-middle longitudinal beam;

[0058] 17- transition plate;

[0059] 18-transformer beam assembly; 181-transformer beam; 182-second traction seat; 1821-countersunk hole; 1822-first stop surface; 1823-first mounting hole; 183-first support beam; 184-second support beam. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0061] In this application, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0062] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0063] The technical solution of the present application will be further described below in conjunction with specific embodiments and drawings.

[0064] Please also read Figure 1 and Figure 2 In the first aspect, an embodiment of the present invention provides a chassis 1, comprising a bolster assembly 11. The bolster assembly 11 comprises a bolster 111, two secondary spring seats 112, a first traction seat 113 and two coolant pipes 114. Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The bolster 111 includes a bottom plate 1111, a top plate 1112 spaced apart from the bottom plate 1111, two end plates 1113 connected to the bottom plate 1111 and the top plate 1112, and two side plates 1114 connected between the bottom plate 1111 and the top plate 1112. The bottom plate 1111, the top plate 1112, the two end plates 1113 and the two side plates 1114 form a receiving cavity 1115, wherein the two end plates 1113 are arranged along a first direction (such as Figure 2 The two side plates 1114 are arranged in a spaced relationship along the second direction (as shown in the X direction). Figure 2 The first direction is perpendicular to the second direction. The two secondary spring seats 112 are both installed in the accommodating cavity 1115. The first traction seat 113 is arranged on the bottom plate 1111, and the first traction seat 113 is located between the two secondary spring seats 112 in the second direction. The two coolant pipes 114 are arranged in the accommodating cavity 1115 and between the two secondary spring seats 112 in the second direction. The two coolant pipes 114 extend along the first direction, and the two ends of the coolant pipes 114 pass through the two end plates 1113 respectively.

[0065] Among them, the end plate 1113 and the bottom plate 1111 as well as the end plate 1113 and the top plate 1112 are connected by welding. Similarly, the side plate 1114 and the bottom plate 1111 as well as the side plate 1114 and the top plate 1112 are connected by welding, and the end plate 1113 and the side plate 1114 are also connected by welding, so as to enhance the connection strength of the pillow beam 111 and ensure the stability of the pillow beam 111.

[0066] The two secondary spring seats 112 are respectively adjacent to the side plates 1114 on both sides, so that the first traction seat 113 is located between the two secondary spring seats 112 in the second direction. The two coolant pipes 114 are located between the two secondary spring seats 112 in the second direction, and each coolant pipe 114 is respectively adjacent to the secondary spring seat 112 on the same side.

[0067] In this embodiment, the secondary spring seat 112 and the first traction seat 113 are both installed on the bolster 111, wherein the secondary spring seat 112 is used to connect with the secondary spring, and the first traction seat 113 is used to connect with the traction pin of the bogie, so that the bolster 111 can not only realize the transmission of the weight on the secondary spring to the bogie, but also transmit the traction force and braking force of the bogie to the chassis 1 through the traction seat, so as to simplify the transmission route of the traction force of the bogie. In addition, the first traction seat 113 is arranged between the two secondary spring seats 112, which helps to more evenly transmit the traction force and braking force from the bogie to the chassis 1. The secondary spring seat 112 and the first traction seat 113 can work together to better control the relative movement between the chassis 1 and the bogie, reduce the swaying and vibration of the rail vehicle during driving, and reduce local stress concentration, thereby improving the durability and reliability of the chassis 1.

[0068] It should be noted that in the embodiment of the present application, the bogie is directly connected to the first traction seat 113 through a traction pin. Compared with the prior art in which the bogie is connected to the traction seat through a traction rod, the number of required parts is less and the structure is simpler, which indirectly improves the assembly efficiency and maintenance efficiency between the bogie and the first traction seat 113, and reduces the cost of the first traction seat 113. In addition, the bogie is connected to the first traction seat 113 through a traction pin, which can improve the longitudinal stiffness between the bogie and the first traction seat 113, and can more stably transmit traction and braking forces. At the same time, due to the high stiffness of the traction pin, the relative movement between the chassis 1 and the bogie can be better constrained, thereby reducing the vibration and impact between the chassis 1 and the bogie, making the rail vehicle more stable during operation. Furthermore, the bogie is connected to the first traction seat 113 through a traction pin, which can reduce the proportion of space occupied below the bolster 111, and provide more space for the arrangement of other components of the chassis 1.

[0069] It can be understood that since the first traction seat 113 is arranged on the bottom plate 1111, the bogie will inevitably occupy the space below the bolster 111 when it is connected to the first traction seat 113. In order to avoid the problem of interference between the coolant pipe 114 and the bogie, the coolant pipe 114 is arranged in the accommodating cavity 1115 in the embodiment of the present application, so as to avoid the interference between the bogie and the coolant pipe 114 when the coolant pipe 114 is arranged below the bolster 111. At the same time, the space below the bolster 111 can be further saved, and more space can be provided for the arrangement of other components of the chassis 1, and the flow path of the coolant can be optimized. In addition, the bolster 111 not only protects the coolant pipe 114 and prolongs the service life of the coolant pipe 114, but also has a certain insulation effect on the coolant flowing in the coolant pipe 114.

[0070] See also Figure 2 In some embodiments, the bolster assembly 11 further includes a first rib plate 1151 and a second rib plate 1152. The first rib plate 1151 is disposed in the accommodating cavity 1115, and the first rib plate 1151 is connected between the second spring seat 112 and the adjacent side plate 1114. The second rib plate 1152 is disposed in the accommodating cavity 1115, and the second rib plate 1152 is connected between the second spring seat 112 and the end plate 1113.

[0071] In this embodiment, the first rib plate 1151 and the second rib plate 1152 are disposed in the accommodating cavity 1115 , thereby preventing the first rib plate 1151 and the second rib plate 1152 from occupying the space outside the bolster 111 .

[0072] Among them, the first rib plate 1151 is connected between the second spring seat 112 and the adjacent side plate 1114, and the first rib plate 1151 extends substantially along the second direction, and can fix the second spring seat 112 in the second direction. Similarly, the second rib plate 1152 is connected between the second spring seat 112 and the end plate 1113, and the second rib plate 1152 extends substantially along the first direction, and can fix the second spring seat 112 in the first direction. The first rib plate 1151 and the second rib plate 1152 can make the connection between the second spring seat 112 and the bolster 111 more stable, and prevent the second spring seat 112 from falling off.

[0073] Please continue reading Figure 2 In some embodiments, the bolster assembly 11 further includes a first vertical plate 1153 and a third rib plate 1154. The first vertical plate 1153 is disposed in the accommodating cavity 1115, and each of the first vertical plates 1153 is connected between the two end plates 1113, wherein each first vertical plate 1153 is disposed between each secondary spring seat 112 and an adjacent coolant pipe 114. The third rib plate 1154 is connected between the secondary spring seat 112 and an adjacent first vertical plate 1153.

[0074] There are two first vertical plates 1153, and both ends of the first vertical plates 1153 are respectively welded to the two end plates 1113, one of the first vertical plates 1153 is located between the second spring seat 112 and the coolant pipe 114 on one side, and the other first vertical plate 1153 is located between the second spring seat 112 and the coolant pipe 114 on the other side. The first vertical plates 1153 separate the second spring seat 112 and the coolant pipe 114, so as to prevent the second spring seat 112 from hitting the coolant pipe 114 when it falls off.

[0075] The third rib plate 1154 is welded between the second spring seat 112 and the first vertical plate 1153 on the same side, and the third rib plate 1154 extends substantially along the second direction, so as to cooperate with the first rib plate 1151 in the second direction to further fix the second spring seat 112, thereby further preventing the second spring seat 112 from falling off.

[0076] Please continue reading Figure 2 In some embodiments, the bolster assembly 11 further includes a second vertical plate 1155, a third vertical plate 1156, and a fourth rib plate 1157. The second vertical plate 1155 is disposed in the accommodating cavity 1115, and each of the second vertical plates 1155 is connected between the two end plates 1113, wherein each coolant pipe 114 is provided with a first vertical plate 1153 on a side away from the adjacent first vertical plate 1153. The third vertical plate 1156 is disposed in the accommodating cavity 1115, and the third vertical plate 1156 is connected between the two second vertical plates 1155. The fourth rib plate 1157 is disposed in the accommodating cavity 1115, and the fourth rib plate 1157 is connected between the first vertical plate 1153 and the adjacent second vertical plate 1155, and the fourth rib plate 1157 is provided with an avoidance hole for the coolant pipe 114 to pass through.

[0077] There are two second vertical plates 1155, and both ends of the second vertical plates 1155 are respectively welded to the two end plates 1113. The two second vertical plates 1155 are arranged between the two coolant pipes 114, and the two second vertical plates 1155 are both adjacent to the coolant pipes 114 on the same side, that is, the two coolant pipes 114 are both located between the adjacent first vertical plates 1153 and the adjacent second vertical plates 1155, which can further protect the coolant pipes 114.

[0078] The third vertical plate 1156 is welded between the two second vertical plates 1155, and can support the two second vertical plates 1155 in the second direction to prevent deformation of the second vertical plates 1155. Exemplarily, there are two third vertical plates 1156, and the two third vertical plates 1156 are adjacent to the two end plates 1113 respectively.

[0079] The fourth rib 1157 is welded between the first vertical plate 1153 and the second vertical plate 1155, which can prevent the first vertical plate 1153 and the second vertical plate 1155 from deforming and squeezing toward the middle to affect the coolant pipe 114. It should be noted that the number of the fourth ribs 1157 is at least two, and the welding positions of a part of the fourth ribs 1157 welded to the first vertical plate 1153 and the welding positions of the third ribs 1154 welded to the first vertical plate 1153 are not staggered in the first direction, and the welding positions of the other part of the fourth ribs 1157 welded to the second vertical plate 1155 and the welding positions of the third vertical plate 1156 welded to the second vertical plate 1155 are not staggered in the first direction.

[0080] Among them, the welding position where a part of the fourth rib 1157 is welded to the first vertical plate 1153 and the welding position where the third rib 1154 is welded to the first vertical plate 1153 are not staggered in the first direction, so that the force transmitted to the first vertical plate 1153 by the third rib 1154 will offset the force transmitted to the first vertical plate 1153 by the fourth rib 1157, and no torque will be formed between the part of the fourth rib 1157 to cause deformation of the first vertical plate 1153.

[0081] Similarly, the welding position where another part of the fourth rib 1157 is welded to the second vertical plate 1155 and the welding position where the third vertical plate 1156 is welded to the second vertical plate 1155 are not staggered in the first direction, so that the force transmitted to the second vertical plate 1155 by the third vertical plate 1156 will offset the force transmitted to the second vertical plate 1155 by the fourth rib 1157, and will not form a torque between the part of the fourth rib 1157 to cause deformation of the second vertical plate 1155.

[0082] It can be understood that the first vertical plate 1153 and the second vertical plate 1155 are both substantially extended in the first direction, which can enhance the stability of the end plate 1113 in the first direction and effectively prevent the deformation of the end plate 1113. The first rib plate 1151, the third rib plate 1154, the fourth rib plate 1157 and the third vertical plate 1156 are all substantially extended in the second direction, which can enhance the stability of the side plate 1114, the first vertical plate 1153 and the second vertical plate 1155 in the second direction and effectively prevent the deformation of the side plate 1114, the first vertical plate 1153 and the second vertical plate 1155. At the same time, the second spring seat 112 is connected to the side plate 1114 through the first rib plate 1151, connected to the end plate 1113 through the second rib plate 1152, and connected to the first vertical plate 1153 through the third rib plate 1154, which can enhance the stability of the connection between the second spring seat 112 and the pillow beam 111 in the first direction and the second direction, and effectively prevent the vibration in the first direction and the second direction from causing the second spring seat 112 to separate from the pillow beam 111.

[0083] Please also read Figure 3and Figure 4 In some embodiments, the bottom plate 1111 is provided with two first through holes 1111a, and the top plate 1112 is provided with two second through holes 1112a, and the two first through holes 1111a, the two second through holes 1112a and the two second spring seats 112 correspond to each other one by one, wherein the bottom of the second spring seat 112 is welded to the edge of the corresponding first through hole 1111a surrounded by the bottom plate 1111, the top of the second spring seat 112 protrudes the corresponding second through hole 1112a, and the side surface of the second spring seat 112 is welded to the edge of the corresponding second through hole 1112a surrounded by the bottom plate 1111.

[0084] The bottom of the second spring seat 112 is welded to the edge of the corresponding first through hole 1111 a formed by the bottom plate 1111 , so that the second spring can extend through the first through hole 1111 a and connect with the second spring seat 112 .

[0085] It can be understood that, usually, the upper surface of the top plate 1112 of the bolster 111 and the upper surface of the side beam of the chassis 1 are roughly in the same plane, and the top surface of the second spring seat 112 and the upper surface of the bolster 111 are also roughly in the same plane. If the length of the second spring is long and fixed, the second spring seat 112 cannot match the second spring, and the installation position of the bolster 111 and the second spring seat 112 needs to be moved upward, resulting in the upper surface of the bolster 111 being higher than the upper surface of the side beam, causing stress concentration to easily occur at the connection position between the bolster 111 and the side beam. In order to solve this problem, in this embodiment, a second through hole 1112a is provided on the top plate 1112 of the bolster 111, and the top of the second spring seat 112 protrudes the corresponding second through hole 1112a. Moving the installation position of the second spring seat 112 upward can keep the upper surface of the bolster 111 and the upper surface of the side beam roughly coplanar, so that the second spring seat 112 can adapt to the longer second spring.

[0086] In addition, compared with the prior art in which a connecting plate is arranged between the side surface of the portion of the second spring seat 112 protruding from the second through hole 1112a and the upper surface of the bolster 111, the embodiment of the present application arranges the first rib plate 1151, the second rib plate 1152 and the third rib plate 1154 connecting the second spring seat 112 in the accommodating cavity 1115, which can save the space above the bolster 111 and avoid encroaching on the space of the cables arranged above the bolster 111.

[0087] Please also read Figure 1 , Figure 3 and Figure 5In some embodiments, the secondary spring seat 112 includes a surrounding plate 1121 and a top seat 1122. The bottom of the surrounding plate 1121 is welded to the edge of the corresponding first through hole 1111a surrounded by the bottom plate 1111 to form a first weld. The bottom of the top seat 1122 is welded to the top of the surrounding plate 1121, and the top of the top seat 1122 protrudes a corresponding second through hole 1112a, and the side of the top seat 1122 is welded to the edge of the corresponding second through hole 1112a surrounded by the bottom plate 1111 to form a second weld. The second weld is in the third direction (such as Figure 4 The third direction is perpendicular to the first direction and the third direction is perpendicular to the second direction.

[0088] See also Figure 1 The secondary spring seat 112 further includes a guide pin 1123, which is connected to the bottom of the top seat 1122 and is used to connect the secondary spring.

[0089] In this embodiment, the second weld is staggered with the first weld in the third direction, which can disperse the stress and avoid stress concentration on the secondary spring seat 112. At the same time, it can ensure that the secondary spring seat 112 has a good bending and shear resistance in the third direction, thereby ensuring the structural strength of the secondary spring seat 112 in the third direction.

[0090] Please also read Figure 1 and Figure 6 In some embodiments, the number of the bolster assemblies 11 is two, and the two bolster assemblies 11 are arranged at intervals along the first direction. The chassis 1 further includes a left beam 12 and a right beam 13, a front traction beam 14 and a rear traction beam 15, and an intermediate longitudinal beam 16. The left beam 12 and the right beam 13 are arranged at intervals along the second direction, and the bolster 111 is connected between the left beam 12 and the right beam 13. The front traction beam 14 and the rear traction beam 15 are arranged at intervals in the first direction, and the front traction beam 14 and the rear traction beam 15 are both connected between the left beam 12 and the right beam 13, wherein the two bolster assemblies 11 are located between the front traction beam 14 and the rear traction beam 15 in the first direction. The intermediate longitudinal beam 16 extends along the first direction and is located between the left beam 12 and the right beam 13, and the two ends of the intermediate longitudinal beam 16 are respectively connected to the front traction beam 14 and the rear traction beam 15, and the first traction seat 113 is connected to the intermediate longitudinal beam 16 through a transition plate 17.

[0091] The front traction beam 14, the rear traction beam 15, the left beam 12 and the right beam 13 are connected to form a basic frame of the chassis 1. The two bolster beam assemblies 11 can be respectively adjacent to the front traction beam 14 and the rear traction beam 15, which can better disperse and transfer the load, improve the bearing capacity of the chassis 1, and better resist the impact of the rail vehicle during operation to maintain the stability of the chassis 1.

[0092] In addition, the middle longitudinal beam 16 is connected between the front traction beam 14 and the rear traction beam 15, which can further enhance the stability of the chassis 1. The first traction seat 113 is connected to the middle longitudinal beam 16 through the transition plate 17, which can further enhance the stability of the first traction seat 113.

[0093] See also Figure 6 In some embodiments, the chassis 1 further includes a transformer beam assembly 18, and the transformer beam assembly 18 is located between the two bolster beam assemblies 11. The transformer beam assembly 18 includes two transformer beams 181 and four second traction seats 182. The two transformer beams 181 are connected between the left beam 12 and the right beam 13, and the two transformer beams 181 are spaced apart along the first direction. A second traction seat 182 is provided at both ends of each transformer beam 181, wherein the type of bogie connected to the second traction seat 182 is different from the type of bogie connected to the first traction seat 113.

[0094] The tops of the two transformer beams 181 are connected to the middle longitudinal beam 16, and the middle positions of the two transformer beams 181 are used to install the transformer and stably support the transformer to prevent the transformer from being displaced or damaged due to external vibration or impact.

[0095] In the embodiment of the present application, a second traction seat 182 is provided at both ends of each transformer beam 181, which can form multi-point support, enhance the stability of the connection between the bogie and the transformer beam 181, and effectively prevent the bogie from shifting or loosening relative to the transformer beam 181 during operation, thereby ensuring the stability of the rail vehicle operation. In addition, it also helps to achieve balanced transmission and dispersion of force between the bogie and the transformer beam 181, and improve the transmission efficiency of traction and braking force between the bogie and the transformer beam 181.

[0096] It should be noted that the type of bogie that the second traction seat 182 is used to connect is different from the type of bogie that the first traction seat 113 is used to connect, so that the chassis 1 can be suitable for different types of bogies, which increases the flexibility and adaptability of the chassis 1, so that the chassis 1 can select a suitable bogie according to different operating requirements and line conditions.

[0097] It is understandable that the type of bogie that the second traction seat 182 is used to connect to is different from the type of bogie that the first traction seat 113 is used to connect to, which may be caused by the difference in structure between the second traction seat 182 and the first traction seat 113.

[0098] See also Figure 7Exemplarily, the second traction seat 182 may be provided with a countersunk hole 1821 having a first stop surface 1822, and the second traction seat 182 may also be provided with a plurality of first mounting holes 1823 arranged around the countersunk hole 1821, and the plurality of first mounting holes 1823 are used to install the traction pins of the bogie adapted to the second traction seat 182, thereby connecting the second traction seat 182 with the adapted bogie.

[0099] See also Figure 8 The first traction seat 113 may have a second stop surface 1131 and a third stop surface 1132 that are opposite to each other in the first direction, and the first traction seat 113 is provided with a plurality of second mounting holes 1133 and a plurality of third mounting holes 1134, and the plurality of second mounting holes 1133 and the plurality of third mounting holes 1134 are both located between the second stop surface 1131 and the third stop surface 1132 in the first direction, wherein the plurality of second mounting holes 1133 are arranged at intervals along the second direction and are adjacent to the second stop surface 1131, and the plurality of third mounting holes 1134 are arranged at intervals along the second direction and are adjacent to the third stop surface 1132. The plurality of second mounting holes 1133 and the plurality of third mounting holes 1134 are used to install the traction pins of the bogie matched with the first traction seat 113, so as to connect the first traction seat 113 with the matched bogie.

[0100] Please refer again Figure 6 In some embodiments, the transformer beam assembly 18 further includes a first support beam 183 and a second support beam 184, both of which are connected between the two transformer beams 181, and the first support beam 183 and the second support beam 184 are respectively located on both sides of the middle longitudinal beam 16 in the second direction. The provision of the first support beam 183 and the second support beam 184 not only further enhances the structural rigidity between the two transformer beams 181, but also improves the bearing capacity of the chassis 1 while ensuring the stability of the chassis 1.

[0101] In some embodiments, the thickness of the two ends of the transformer beam 181 in the first direction is greater than the thickness of the middle position of the transformer beam 181 in the first direction.

[0102] The middle position of the transformer beam 181 is used to install the transformer.

[0103] Increasing the thickness of both ends of the transformer beam 181 in the first direction can improve the ability of the ends of the transformer beam 181 to bear the force applied to the transformer beam 181 by the second traction seat 182, thereby avoiding damage or deformation of the ends of the transformer beam 181.

[0104] In addition, the first support beam 183 can be adjacent to the left beam 12, the second support beam 184 can be adjacent to the right beam 13, the two ends of the first support beam 183 can be respectively connected to the ends of the two transformer beams 181 connected to the left beam 12, and the two ends of the second support beam 184 can be respectively connected to the ends of the two transformer beams 181 connected to the right beam 13.

[0105] In a second aspect, the present invention further provides a rail vehicle (not shown in the figure), comprising the above-mentioned underframe 1.

[0106] The rail vehicle provided in the embodiment of the present application includes the above-mentioned chassis 1, which avoids the interference between the bogie and the coolant pipe 114 when the coolant pipe 114 is arranged under the bolster 111, and can further save the space under the bolster 111, further provide more space for the arrangement of other components of the chassis 1, and optimize the flow path of the coolant. In addition, the bolster 111 not only protects the coolant pipe 114 and prolongs the service life of the coolant pipe 114, but also has a certain insulation effect on the coolant flowing in the coolant pipe 114. In addition, the rail vehicle can be compatible with different types of bogies, which increases the flexibility and adaptability of the rail vehicle, so that the rail vehicle can select a suitable bogie according to different operating requirements and line conditions.

[0107] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0108] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the features of the various dependent claims and herein may be combined in a manner different from that described in the original claims. It should also be understood that the features described in conjunction with the individual embodiments may be used in other embodiments.

Claims

1. A chassis, characterized in that: A bolster assembly is included, the bolster assembly comprising: A bolster, the bolster comprising a bottom plate, a top plate spaced from the bottom plate, two end plates connected to the bottom plate and the top plate, and two side plates connected between the bottom plate and the top plate, the bottom plate, the top plate, the two end plates and the two side plates enclosing a receiving cavity, wherein the two end plates are spaced apart along a first direction, and the two side plates are spaced apart along a second direction, and the first direction is perpendicular to the second direction; Two secondary spring seats, both of which are installed in the accommodating cavity; A first traction seat, the first traction seat is disposed on the bottom plate, and the first traction seat is located between the two second spring seats in the second direction; and Two coolant pipes, the two coolant pipes are arranged in the accommodating cavity at intervals in the second direction and are located between the two second spring seats, the two coolant pipes both extend along the first direction, and the two ends of the coolant pipes respectively pass through the two end plates.

2. The chassis according to claim 1, characterized in that: The bolster assembly further comprises: a first rib plate, the first rib plate being disposed in the accommodating cavity and connected between the second spring seat and the adjacent side plate; and A second rib plate is disposed in the accommodating cavity and connected between the second spring seat and the end plate.

3. The chassis according to claim 2, characterized in that: The bolster assembly further comprises: a first vertical plate, the first vertical plate being disposed in the accommodating cavity and connected between the two end plates, wherein the first vertical plate is disposed between each of the second spring seats and the adjacent coolant pipe; and A third rib plate is connected between the second spring seat and the adjacent first vertical plate.

4. The chassis according to claim 3, characterized in that: The bolster assembly further comprises: A second vertical plate, the second vertical plate is arranged in the accommodating cavity, and the second vertical plate is connected between the two end plates, wherein a first vertical plate is arranged on a side of each of the coolant pipes away from the adjacent first vertical plate; a third vertical plate, the third vertical plate being disposed in the accommodating cavity and connected between two of the second vertical plates; and A fourth rib plate, wherein the fourth rib plate is disposed in the accommodating cavity and connected between the first vertical plate and the adjacent second vertical plate, and the fourth rib plate is provided with an avoidance hole for the coolant pipeline to pass through.

5. The chassis according to any one of claims 1 to 4, characterized in that: The bottom plate is provided with two first through holes, and the top plate is provided with two second through holes, and the two first through holes, the two second through holes and the two second spring seats correspond to each other one by one, wherein the bottom of the second spring seat is welded to the edge of the corresponding first through hole surrounded by the bottom plate, the top of the second spring seat protrudes the corresponding second through hole, and the side surface of the second spring seat is welded to the edge of the corresponding second through hole surrounded by the bottom plate.

6. The chassis according to claim 5, characterized in that: The secondary spring seat comprises: A surrounding plate, the bottom of the surrounding plate and the edge of the corresponding first through hole surrounded by the bottom plate are welded to form a first weld; and A top seat, wherein the bottom of the top seat is welded to the top of the enclosure plate, and the corresponding second through hole protrudes from the top of the top seat, and the side surface of the top seat is welded to the edge of the corresponding second through hole surrounded by the bottom plate to form a second weld; The second weld is staggered with the first weld in a third direction, the third direction is perpendicular to the first direction and the third direction is perpendicular to the second direction.

7. The chassis according to any one of claims 1 to 4, characterized in that: The number of the bolster assemblies is two, and the two bolster assemblies are spaced apart along the first direction; the chassis further includes: A left beam and a right beam, wherein the left beam and the right beam are spaced apart along the second direction, and the bolster is connected between the left beam and the right beam; a front end traction beam and a rear end traction beam, wherein the front end traction beam and the rear end traction beam are spaced apart in the first direction, and the front end traction beam and the rear end traction beam are both connected between the left beam and the right beam, wherein two of the bolster beam assemblies are located between the front end traction beam and the rear end traction beam in the first direction; and An intermediate longitudinal beam, the intermediate longitudinal beam extends along the first direction and is located between the left beam and the right beam, and two ends of the intermediate longitudinal beam are respectively connected to the front end traction beam and the rear end traction beam, and the first traction seat is connected to the intermediate longitudinal beam through a transition plate.

8. The chassis according to claim 7, characterized in that: It also includes a transformer beam assembly, wherein the transformer beam assembly is located between the two bolster beam assemblies; the transformer beam assembly includes: two transformer beams, the two transformer beams are connected between the left beam and the right beam, and the two transformer beams are spaced apart along the first direction; and Four second traction seats, one second traction seat is provided at both ends of each transformer beam, wherein the type of bogies connected to the second traction seats is different from the type of bogies connected to the first traction seats.

9. The chassis according to claim 8, characterized in that The thickness of the two ends of the transformer beam in the first direction is greater than the thickness of the middle position of the transformer beam in the first direction.

10. A rail vehicle, characterized in that: Comprising a chassis as described in any one of claims 1-9.

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