Combinable aluminum alloy subway car body profiles

Abstract

The present invention relates to a combinable aluminum alloy subway car body profile, including a roof profile, a roof side member profile, a sidewall profile, a floor side member profile and a floor profile, the roof profile includes roof side profile members of two different widths and is suitable for A-type cars and B-type cars respectively, the roof side member profile includes drum car roof side member and trapezoid car roof side member and is suitable for drum car and trapezoid car respectively, the sidewall profile includes drum car sidewall middle profile member and trapezoid car sidewall middle profile member and is suitable for drum car and trapezoid car respectively, the floor side member profile includes drum car floor side member and trapezoid car floor side member and is suitable for drum car and trapezoid car respectively, and the floor profile includes chassis side profile members of two different widths and is suitable for A-type cars and B-type cars respectively. The present invention optimizes the design of the profile and improves the commonality of the profile, thereby enabling the profile to be adapted to a wide variety of vehicle types to the maximum extent possible, and realizing the construction of the body cross sections of A-type trapezoidal car, A-type drum car, B-type trapezoidal car, and B-type drum car using only 17 types of profile.

Description

[Technical Field]

[0001] The present invention relates to rail vehicle body structure, especially to a combinable aluminum alloy subway body profile section, which is mainly used in the production of A-type / B-type, drum-type / trapezoidal car bodies. [Background technology]

[0002] Currently, there are two main types of aluminum alloy subway car bodies widely used in China: Type A and Type B. Each of these car bodies has two cross sections: drum type and trapezoid type. The assembly of each car body component is mainly performed by welding. The large number of types of car body sections not only requires large amounts of design and mold opening costs, but also hinders the improvement of product process stability and quality.

[0003] If we ignore the joints between the car body and other systems and only consider the combination of car shape and cross section, there are four types of car body. Welded aluminum alloy car body sections are typically made up of 22 sections of 12 types, and if the cross sections of the four car shapes were designed individually, 48 types of sections would be required. Currently, the cross sections of the section material for each type of car body are often designed individually. Type A and Type B cars are not universal, and drum type cars and trapezoidal cars are not universal. The lack of affinity and compatibility between the four car body types increases development and production costs. Summary of the Invention [Problem to be solved by the invention]

[0004] The object of the present invention is to provide a combinable aluminum alloy subway car body section, which can be used to produce different car shapes and bodies with different cross sections by replacing a small amount of section material, mainly to address the problem of the four types of car bodies not being universally available in the prior art. [Means for solving the problem]

[0005] In order to solve the above technical problems, the present invention provides a combinable aluminum alloy subway car body section comprising a roof section, a roof side member section, a sidewall section, a floor side member section and a floor section, and adjacent sections are fixedly connected to form a car body, the roof section comprising roof side section sections of two different widths and suitable for A-type cars and B-type cars respectively, the roof side member section comprising drum car roof side members and trapezoid car roof side members and suitable for drum car and trapezoid car respectively, the sidewall section comprising drum car sidewall middle section and trapezoid car sidewall middle section and suitable for drum car and trapezoid car respectively, the floor side member section comprising drum car floor side members and trapezoid car floor side members and suitable for drum car and trapezoid car respectively, and the floor section comprising chassis side section sections of two different widths and suitable for A-type cars and B-type cars respectively.

[0006] Furthermore, the roof profile includes a first roof profile located in the center of the roof and a second roof profile located between the first roof profile and the roof side profile, and the first roof profile, second roof profile, and roof side profile are inserted and welded together in that order to secure the structure.

[0007] Furthermore, the floor profile includes a first floor profile located in the center of the floor and a second floor profile located between the first floor profile and the floor side profile, and the first floor profile, second floor profile, and floor side profile are inserted and welded in order to be fixed.

[0008] Furthermore, the sidewall section includes a first sidewall section, a second sidewall section, a middle sidewall section, and a third sidewall section, which are connected in this order from top to bottom, and the first sidewall section, the second sidewall section, the middle sidewall section, and the third sidewall section are inserted into and welded to each other in this order, the upper end of the first sidewall section is inserted into and welded to a roof side member, and the third sidewall section is inserted into and welded to a floor side member, and The present invention also provides a design method for an aluminum alloy subway car body, which is realized based on the aluminum alloy subway car body section described in claim 1, and is characterized in that the roof side section, drum car roof side member, trapezoid car roof side member, drum car sidewall middle section, trapezoid car sidewall middle section, drum car floor side member, trapezoid car floor side member, and chassis side section can be replaced to adapt to car bodies with different cross sections. [Effects of the Invention]

[0009] The present invention optimizes the design of the sections and improves the commonality of the sections, thereby maximizing the compatibility of the sections with various vehicle types, and using only 17 types of sections to achieve the construction of the body sections of A-type trapezoidal cars, A-type drum cars, B-type trapezoidal cars, and B-type drum cars. The car body sections of the present invention take into account both the A-type and B-type car shapes and the trapezoidal and drum-type cross sections, achieving maximum commonality of the car body sections among various vehicle types. This invention saves design costs and mold opening costs, stabilizes the car body welding process, and stabilizes product quality. [Brief explanation of the drawings]

[0010] [Figure 1] This is a schematic diagram of the replacement of an A-type drum car body with an A-type trapezoidal car body. [Figure 2] This is a schematic diagram of the replacement of a B-type drum car body with a B-type trapezoidal car body. [Figure 3]It is a schematic diagram of the replacement of the A-type drum-shaped car body and the B-type trapezoidal car body. [Figure 4] It is a schematic diagram of the replacement of the B-type drum-shaped car body and the A-type trapezoidal car body.

Embodiments for Carrying out the Invention

[0011] Hereinafter, embodiments of the present invention will be interpretively described in conjunction with the drawings.

[0012] As shown in FIGS. 1 to 4, the combinable aluminum alloy subway car body profiles of this embodiment include a roof profile, a roof side member profile, a side wall profile, a floor side member profile, and a floor profile. Between adjacent profiles, the car body is formed by inserting, welding, and fixing them.

[0013] The roof profile includes a first roof profile 1 located in the middle of the roof, a second roof profile 2 located on both sides of the first roof profile 1, and a roof side profile located outside the second roof profile 2. The roof side profile has two types of dimensions, namely the A-type car roof side profile 3a and the B-type car roof side profile 3b, which are respectively adapted to the A-type car and the B-type car. The first roof profile 1, the second roof profile 2, and the roof side profiles (3a, 3b) are inserted, welded, and fixed in sequence.

[0014] The roof side member profile has two types of specifications, namely the drum-shaped car roof side member 4a and the trapezoidal car roof side member 4b, which are respectively adapted to the drum-shaped car and the trapezoidal car. The drum-shaped car roof side member 4a has a larger inner inclination angle, preferably an inclination angle of 7 degrees (the form in FIG. 1), and the trapezoidal car roof side member 4b has a smaller inner inclination angle, preferably an inclination angle of 5 degrees (the form in FIG. 1). The upper end of the roof side member profile is inserted into the roof side profiles (3a, 3b) and fixed by welding.

[0015] The sidewall section includes a first sidewall section 5, a second sidewall section 6, a middle sidewall section, and a third sidewall section 8, which are inserted and welded from top to bottom. The middle sidewall sections have two sizes: a drum-shaped wheel middle sidewall section 7a and a trapezoidal wheel middle sidewall section 7b, which are suitable for drum-shaped wheels and trapezoidal wheels, respectively. The drum-shaped wheel has an outward protrusion in the middle of the sidewall, the width of the drum-shaped wheel at the middle of the sidewall is greater than the width of the trapezoidal wheel, and the middle of the sidewall has a large inward inclination angle, preferably 7 degrees (in this embodiment). The trapezoidal wheel has a small inward inclination angle in the middle of the sidewall, preferably 5 degrees (in this embodiment). The upper ends of the first sidewall shapes 5 are inserted into the roof side members (4a, 4b) and fixed by welding, and the third sidewall shapes 8 are inserted into the floor side member shapes (9a, 9b) and fixed by welding.

[0016] The floor side member profiles also come in two specifications: drum-type car floor side member 9a and trapezoidal car floor side member 9b, which are suitable for drum-type cars and trapezoidal cars, respectively. The floor side member for drum-type cars has a larger outward tilt angle, preferably 4 degrees, and the floor side member for trapezoidal cars is approximately perpendicular to the chassis floor.

[0017] The floor section includes a first floor section 12 located in the middle of the floor, second floor sections 11 located on both sides of the first floor section 12, and chassis side sections located on the outside of the second floor section 11. The first floor section 12, second floor section 11, and chassis side sections are inserted into each other in order and fixed by welding. The chassis side sections come in two widths: chassis side section 10a for A-type vehicles and chassis side section 10b for B-type vehicles, which are suitable for A-type vehicles and B-type vehicles, respectively. The outer ends of the chassis side sections are inserted into floor side member sections (9a, 9b) and fixed by welding.

[0018] The present invention realizes the material selection and assembly of trapezoidal and drum-shaped cross-sections of the same vehicle type and the material selection and assembly of trapezoidal and drum-shaped cross-sections of different vehicle types with fewer cross-section profiles. Between the trapezoidal and drum-shaped cross-sections of the same vehicle type, the conversion of the vehicle body structure can be realized by replacing three types (six sheets) of profiles. Between the trapezoidal and drum-shaped vehicle body cross-sections of different vehicle types (type A trapezoid and type B drum, type A drum and type B trapezoid), the conversion of the vehicle body structure can be realized by replacing five types (ten sheets) of profiles in each case.

[0019] For the body of a drum-shaped vehicle, it includes a drum-shaped vehicle roof side member 4a, a drum-shaped vehicle side wall middle profile 7a, and a drum-shaped vehicle floor side member 9a. The body of a trapezoidal vehicle includes a trapezoidal vehicle roof side member 4b, a trapezoidal vehicle side wall middle profile 7b, and a drum-shaped vehicle floor side member 9a. The body of type A vehicle includes a type A vehicle roof side profile 3a and a type A vehicle chassis side profile 10a, and the body of type B vehicle includes a type B vehicle roof side profile 3b and a type B vehicle chassis side profile 10b. The rest are common members.

[0020] Specifically, the bodies of type A drum-shaped vehicle and type A trapezoidal vehicle share the first roof profile 1, the second roof profile 2, the type A vehicle roof side profile 3a, the first side wall profile 5, the second side wall profile 6, the third side wall profile 8, the first floor profile 12, the second floor profile 11, and the type A vehicle chassis side profile 10a. The bodies of type B drum-shaped vehicle and type B trapezoidal vehicle share the first roof profile 1, the second roof profile 2, the type B vehicle roof side profile 3b, the first side wall profile 5, the second side wall profile 6, the third side wall profile 8, the first floor profile 12, the second floor profile 11, and the type B vehicle chassis side profile 10b.

[0021] The present invention further provides a design method for an aluminum alloy subway car body, which is realized based on the profiles of the above aluminum alloy subway car body, and adapts to car bodies with different cross-sections by replacing the roof side profiles (3a, 3b), drum-shaped car roof side members 4a, trapezoidal car roof side members 4b, drum-shaped car side wall middle profiles 7a, trapezoidal car side wall middle profiles 7b, drum-shaped car floor side members 9a, trapezoidal car floor side members 9b, and chassis side profiles (10a, 10b).

[0022] To convert an A-type car body into a B-type car body, it is necessary to perform an operation of replacing the A-type car roof side profile 3a with the B-type car roof side profile 3b, replacing the A-type car chassis side profile 10a with the B-type car chassis side profile 10b, and performing the reverse operation when converting a B-type car body into an A-type car body.

[0023] To convert a drum-shaped car body of the same type into a trapezoidal car body, it is necessary to perform an operation of replacing the drum-shaped car roof side member 4a with the trapezoidal car roof side member 4b, replacing the drum-shaped car side wall middle profile 7a with the trapezoidal car side wall middle profile 7b, replacing the drum-shaped car floor side member 9a with the trapezoidal car floor side member 9b, and performing the reverse operation when converting a trapezoidal car body of the same type into a drum-shaped car body.

[0024] Hereinafter, in conjunction with the drawings, solutions for the conversion of four types of aluminum alloy subway car bodies are provided.

[0025] As shown in FIG. 1, it is a schematic diagram of the replacement between an A-type drum-shaped car body and an A-type trapezoidal car body.

[0026] The roof side members (4a, 4b), the adjacent roof profiles 3a, and the side wall profiles 5 on the first side all have an insertion structure and are connected by welding. Moreover, considering two types of welded joint forms, namely arc welding and friction stir welding (FSW), the maximization of the sharing rate of the vehicle body platform profiles is ultimately achieved. Specifically, the A-type drum-shaped vehicle roof side member 4a, the roof profile 3a, and the first side wall profile 5 have an insertion structure, and the A-type trapezoidal vehicle roof side member 4b, the roof profile 3a, and the first side wall profile 5 have an insertion structure. The side wall profiles (7a, 7b), the adjacent side wall profile 6, and the side wall profile 8 all have an insertion structure and are connected by welding. Specifically, the A-type drum-shaped vehicle side wall middle profile 7a, the side wall profile 6, and the side wall profile 8 all have an insertion structure, and the A-type trapezoidal vehicle side wall profile 7b, the side wall profile 6, and the side wall profile 8 all have an insertion structure. The floor side members (9a, 9b), the adjacent floor profiles 10a, and the adjacent side wall profile 8 all have an insertion structure and are connected by welding. Specifically, the A-type drum-shaped vehicle floor side member 9a, the floor profile 10a, and the side wall profile 8 all have an insertion structure, and the A-type trapezoidal vehicle floor side member 9b, the floor profile 10a, and the side wall profile 8 all have an insertion structure. When replacing the cross-sections of the A-type drum-shaped vehicle and the A-type trapezoidal vehicle body, the drum-shaped vehicle roof side member 4a can be replaced with the trapezoidal vehicle roof side member 4b, the drum-shaped vehicle side wall middle profile 7a can be replaced with the trapezoidal vehicle side wall middle profile 7b, and the drum-shaped vehicle floor side member 9a can be replaced with the trapezoidal vehicle floor side member 9b. The reverse is also true.

[0027] As shown in Fig. 2, it is a schematic diagram of the replacement of the B-type drum-shaped vehicle body and the B-type trapezoidal vehicle body.

[0028] The roof side members (4a, 4b) and the adjacent roof section 3b and sidewall section 5 all have an insert-fit structure and are connected by welding. Specifically, the B-type drum car roof side member 4a and the roof section 3b and the first sidewall section 5 have an insert-fit structure, and the B-type trapezoid car roof side member 4b and the roof section 3b and the first sidewall section 5 have an insert-fit structure. The sidewall sections (7a, 7b) and the adjacent second sidewall section 6 and third sidewall section 8 all have an insert-fit structure and are connected by welding. Specifically, the B-type drum car sidewall section 7a and the second sidewall section 6 and the third sidewall section 8 all have an insert-fit structure, and the B-type trapezoid car sidewall section 7b and the second sidewall section 6 and the third sidewall section 8 all have an insert-fit structure. The floor side members (9a, 9b), the adjacent chassis side profile 10b, and the adjacent third sidewall profile 8 all have an insert-fit structure and are connected by welding. Specifically, the B-type drum car floor side member 9a, floor profile 10b, and sidewall profile 8 all have an insert-fit structure, while the B-type trapezoid car floor side member 9b, floor profile 10b, and sidewall profile 8 all have an insert-fit structure. When interchanging the cross sections of the B-type drum car and trapezoid car bodies, simply replace the drum car roof side member 4a with the trapezoid car roof side member 4b, the drum car sidewall center profile 7a with the trapezoid car sidewall center profile 7b, and the drum car floor side member 9a with the trapezoid car floor side member 9b. The same is true vice versa.

[0029] As shown in Figure 3, this is a schematic diagram of the replacement of the A-type drum-shaped car body with the B-type trapezoidal car body.

[0030] The roof side members (4a, 4b) and the adjacent roof side sections (3a, 3b) and first sidewall section 5 all have an insert-fit structure and are connected by welding. Specifically, the roof side member 4a and roof side section 3a and first sidewall section 5 of an A-type drum-type vehicle have an insert-fit structure, while the roof side member 4b and roof side section 3b and first sidewall section 5 of a B-type trapezoidal vehicle have an insert-fit structure. The second sidewall section 6 and third sidewall section 8 adjacent to the sidewall middle sections (7a, 7b) all have an insert-fit structure and are connected by welding. Specifically, the sidewall middle section 7a and second sidewall section 6 and third sidewall section 8 of an A-type drum-type vehicle have an insert-fit structure, while the sidewall middle section 7b and second sidewall section 6 and third sidewall section 8 of a B-type trapezoidal vehicle have an insert-fit structure. The floor side members (9a, 9b), the adjacent chassis side mold members (10a, 10b), and the adjacent third sidewall mold member 8 all have an insert-fit structure and are connected by welding. Specifically, the floor side member 9a, the chassis side mold member 10a, and the third sidewall mold member 8 of an A-type drum vehicle all have an insert-fit structure, while the floor side member 9b, the chassis side mold member 10b, and the third sidewall mold member 8 of a B-type trapezoidal vehicle all have an insert-fit structure. When interchanging the cross sections of the A-type drum car and B-type trapezoidal car bodies, the A-type drum car roof side section 3a is replaced with the B-type trapezoidal car roof side section 3b, the A-type drum car roof side member 4a is replaced with the B-type trapezoidal car roof side member 4b, the A-type drum car sidewall middle section 7a is replaced with the B-type trapezoidal car sidewall middle section 7b, the A-type drum car floor side member 9a is replaced with the B-type trapezoidal car floor side member 9b, and the A-type drum car chassis side section 10a is replaced with the B-type trapezoidal car chassis side section 10b, and vice versa.

[0031] As shown in Figure 4, this is a schematic diagram of the replacement of the B-type drum-shaped car body with the A-type trapezoidal car body.

[0032] The roof side members (4a, 4b) and the adjacent roof side sections (3a, 3b) and first sidewall section 5 all have an insert-fit structure and are connected by welding. Specifically, the B-type drum-type car roof side member 4a and roof side section 3b and first sidewall section 5 have an insert-fit structure, while the A-type trapezoidal car roof side member 4b and roof side section 3a and first sidewall section 5 have an insert-fit structure. The car sidewall center sections (7a, 7b) and the adjacent second sidewall section 6 and third sidewall section 8 all have an insert-fit structure and are connected by welding. Specifically, the B-type drum-type car sidewall center section 7a and second sidewall section 6 and third sidewall section 8 all have an insert-fit structure, while the A-type trapezoidal car sidewall center section 7b and second sidewall section 6 and third sidewall section 8 all have an insert-fit structure. The floor side members (9a, 9b), the adjacent chassis side mold members (10, 10b), and the adjacent third sidewall mold member 8 all have an insert-fit structure and are connected by welding. Specifically, the floor side member 9a, chassis side mold member 10b, and third sidewall mold member 8 of a B-type drum vehicle all have an insert-fit structure, while the floor side member 9b, chassis side mold member 10a, and third sidewall mold member 8 of an A-type trapezoidal vehicle all have an insert-fit structure. When interchanging the cross sections of the B-type drum car and the A-type trapezoidal car body, the B-type drum car roof side section 3b is replaced with the A-type trapezoidal car roof side section 3a, the B-type drum car roof side member 4a is replaced with the A-type trapezoidal car roof side member 4b, the B-type drum car sidewall middle section 7a is replaced with the A-type trapezoidal car sidewall middle section 7b, the B-type drum car floor side member 9a is replaced with the A-type trapezoidal car floor side member 9b, and the B-type drum car chassis side section 10b is replaced with the A-type trapezoidal car chassis side section 10a, and vice versa.

[0033] As can be seen from the above, the present invention realizes the material selection and assembly of trapezoidal and drum-shaped cross-sections of the same vehicle type and the material selection and assembly of trapezoidal and drum-shaped cross-sections of different vehicle types with fewer cross-sectional profiles. Between the trapezoidal and drum-shaped cross-sections of the same vehicle type, the conversion of the vehicle body structure can be realized by replacing three types (six sheets) of profiles. Between the trapezoidal and drum-shaped vehicle body cross-sections of different vehicle types (type A trapezoid and type B drum, type A drum and type B trapezoid), the conversion of the vehicle body structure can be realized by replacing five types (ten sheets) of profiles in each case.

[0034] In addition to the above embodiments, the present invention can further have other embodiments. Technical solution means formed by equivalent substitution or equivalent transformation are all included in the protection scope of the claims of the present invention.

Explanation of Reference Signs

[0035] 1 First roof profile 2 Second roof profile 3a Roof side profile of type A vehicle 3b Roof side profile of type B vehicle 4a Roof side member of drum-shaped vehicle 4b Roof side member of trapezoidal vehicle 5 First side wall profile 6 Second side wall profile 7a Middle side wall profile of drum-shaped vehicle 7b Middle side wall profile of trapezoidal vehicle 8 Third side wall profile 9a Floor side member of drum-shaped vehicle 9b Floor side member of trapezoidal vehicle 10a Chassis side profile of type A vehicle 10b Chassis side profile of type B vehicle 11 Second floor profile 12 First floor profile

Claims

1. A combinable aluminum alloy subway car body profile used to form any one of the car bodies selected from an A-type drum-shaped car body, an A-type trapezoidal car body, a B-type drum-shaped car body, and a B-type trapezoidal car body by a selective combination of profiles, The aluminum alloy subway car body profile includes a roof profile, a roof side member profile, a side wall profile, a floor side member profile, and a floor profile, and adjacent profiles are fixedly connected to form a car body. The roof profile has a roof side profile portion that selectively includes either an A-type car roof side profile (3a) having a width adapted to an A-type car or a B-type car roof side profile (3b) having a width adapted to a B-type car as a component, and is adaptable to an A-type car and a B-type car respectively. The roof side member profile selectively includes either a drum-shaped car roof side member (4a) having a first inward inclination angle adapted to a drum-shaped car or a trapezoidal car roof side member (4b) having a second inward inclination angle smaller than the first inward inclination angle applied to a trapezoidal car as a component respectively, and is adaptable to a drum-shaped car and a trapezoidal car respectively. The side wall profile has a side wall middle profile that selectively includes either a drum-shaped car side wall middle profile (7a) having the first inward inclination angle in the middle and adapted to a drum-shaped car or a trapezoidal car side wall middle profile (7b) having the second inward inclination angle in the middle and adapted to a trapezoidal car as a component respectively, and is adaptable to a drum-shaped car and a trapezoidal car respectively. The floor side member profile selectively includes either a drum-shaped car floor side member (9a) having a first outward inclination angle adapted to a drum-shaped car or a trapezoidal car floor side member (9b) having a second outward inclination angle smaller than the first outward inclination angle applied to a trapezoidal car as a component respectively, and is adaptable to a drum-shaped car and a trapezoidal car respectively. The floor profile has a chassis side profile that selectively includes either an A-type car chassis side profile (10a) having a width adapted to an A-type car or a B-type car chassis side profile (10b) having a width adapted to a B-type car as a component respectively, and is adaptable to an A-type car and a B-type car respectively. The roof profile further includes a first roof profile (1) located in the middle of the roof and a second roof profile (2) located between the first roof profile (1) and the roof side profiles (3a, 3b) as common components. The first roof profile (1), the second roof profile (2), and the roof side profiles (3a, 3b) are inserted, welded, and fixed in sequence. The floor profile further includes a first floor profile (12) located in the middle of the floor and a second floor profile (11) located between the first floor profile (12) and the chassis side profiles (10a, 10b) as common components. The first floor profile (12), the second floor profile (11), and the selected chassis side profile (10a or 10b) are inserted, welded, and fixed in sequence. The sidewall profile further includes a first sidewall profile (5), a second sidewall profile (6), and a third sidewall profile (8) connected in sequence from top to bottom as common components. The selected sidewall middle profile (7a or 7b) is inserted, welded, and fixed between the second sidewall profile (6) and the third sidewall profile (8). The upper end of the first sidewall profile (5) is inserted, welded, and fixed to the selected roof side member (4a, 4b). The third sidewall profile (8) is inserted, welded, and fixed to the selected floor side member profile (9a or 9b). When forming an A-type drum-shaped vehicle body and an A-type trapezoidal vehicle body, the first roof profile (1), the second roof profile (2), the A-type vehicle roof side profile (3a), the first sidewall profile (5), the second sidewall profile (6), the third sidewall profile (8), the first floor profile (12), the second floor profile (11), and the A-type vehicle chassis side profile (10a) are commonly used. When forming a B-type drum-shaped vehicle body and a B-type trapezoidal vehicle body, The first roof profile (1), the second roof profile (2), the B-type subway car roof side profile (3b), the first side wall profile (5), the second side wall profile (6), the third side wall profile (8), the first floor profile (12), the second floor profile (11) and the B-type subway car chassis side profile (10b) are commonly used, and the aluminum alloy subway car body profiles that can be combined are characterized in that they can be combined.

2. When forming a drum-shaped car body, the drum-shaped car roof side member (4a), the drum-shaped car side wall middle profile (7a), and the drum-shaped car floor side member (9a) are selected and configured. When forming a trapezoidal car body, the trapezoidal car roof side member (4b), the trapezoidal car side wall middle profile (7b) and the drum-shaped car floor side member (9a) are selected and configured. The aluminum alloy subway car body profiles that can be combined according to claim 1 are characterized in that they can be combined.

3. When forming an A-type car body, the wide A-type car roof side profile (3a) and the wide A-type car chassis side profile (10a) are selected and configured. When forming a B-type car body, the narrow B-type car roof side profile (3b) and the narrow B-type car chassis side profile (10b) are selected and configured. The aluminum alloy subway car body profiles that can be combined according to claim 1 are characterized in that they can be combined.

4. An aluminum alloy subway car body replacement method for replacing the cross-section of any car body selected from an A-type drum-shaped car body, an A-type trapezoidal car body, a B-type drum-shaped car body, and a B-type trapezoidal car body, using the aluminum alloy subway car body profiles that can be combined according to claim 1, comprising: A step of specifying either an A-type car body or a B-type car body, and either a drum-shaped car body or a trapezoidal car body as the type of subway car body to be replaced; According to the type of the specified car body, As the roof side profile part of the roof side profile, either the A-type car roof side profile (3a) or the B-type car roof side profile (3b) is selected; As the roof side member profile, either the drum-shaped car roof side member (4a) or the trapezoidal car roof side member (4b) is selected. As the side wall middle profile part of the side wall profile, select either the drum-shaped vehicle side wall middle profile (7a) or the trapezoidal vehicle side wall middle profile (7b). As the floor side member profile, select either the drum-shaped vehicle floor side member (9a) or the trapezoidal vehicle floor side member (9b). As the chassis side profile part of the floor profile, select either the Type A vehicle chassis side profile (10a) or the Type B vehicle chassis side profile (10b). A step of combining each selected profile part and each profile with the first roof profile (1), the second roof profile (2), the first side wall profile (5), the second side wall profile (6), the third side wall profile (8), the first floor profile (12), and the second floor profile (11) according to the connection relationship described in claim 1 to determine the cross-sectional structure of the specified vehicle body. A method for replacing an aluminum alloy subway vehicle body, characterized by including the above steps.

5. When replacing the profiles of a Type A vehicle body with those of a Type B vehicle body, select to replace the Type A vehicle roof side profile (3a) with the Type B vehicle roof side profile (3b) as the roof side profile part, and select to replace the Type A vehicle chassis side profile (10a) with the Type B vehicle chassis side profile (e) as the chassis side profile part. The method for replacing an aluminum alloy subway vehicle body according to claim 4, characterized in that when converting from the design of a Type B vehicle body to the design of a Type A vehicle body, select to replace the Type B vehicle roof side profile (3b) with the Type A vehicle roof side profile (3a) as the roof side profile part, and select to replace the Type B vehicle chassis side profile (10b) with the Type A vehicle chassis side profile (10a) as the chassis side profile part. When replacing the profile of the drum-shaped vehicle body of type A or B with the profile of the trapezoidal vehicle body, select to replace the drum-shaped vehicle roof side member (4a) with the trapezoidal vehicle roof side member (4b) as the roof side member profile, select to replace the drum-shaped vehicle side wall middle profile (7a) with the trapezoidal vehicle side wall middle profile (7b) as the side wall middle profile part, and select to replace the drum-shaped vehicle floor side member (9a) with the trapezoidal vehicle floor side member (9b) as the floor side member profile. When replacing the profile of the trapezoidal vehicle body of type A or B with the profile of the drum-shaped vehicle body, It is necessary to perform an operation of selecting to replace the trapezoidal vehicle roof side member (4b) with the drum-shaped vehicle roof side member (4a) as the roof side member profile, selecting to replace the trapezoidal vehicle side wall middle profile (7b) with the drum-shaped vehicle side wall middle profile (7a) as the side wall middle profile part, and selecting to replace the trapezoidal vehicle floor side member (9b) with the drum-shaped vehicle floor side member (9a) as the floor side member profile. The method for replacing an aluminum alloy subway vehicle body according to claim 4 or 5, characterized in that.

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