Ventilation channel structure for a locomotive traction motor and locomotive

Abstract

The application relates to the field of rail transit technology, and particularly discloses a ventilation channel structure for a locomotive traction motor and a locomotive. The flange of a hose of a soft air duct assembly is fixed with a first pressing plate. A mounting seat is provided with a placing groove, the bottom wall of the placing groove is provided with an air passing hole, one side wall is provided with a limiting hole along a first direction, the first pressing plate is inserted into the placing groove along a second direction and is inserted into the limiting hole along the first direction. A locking assembly is installed on the other side wall, the locking assembly is slidably connected with the mounting seat along the first direction, and an elastic member makes the locking tongue always have a tendency to move to the first position. When assembling, the vehicle body is assembled with the bogie along the second direction, and the first pressing plate is inserted into the mounting groove, and in the subsequent locking process, the first pressing plate and the locking tongue are adjusted along the first direction, and the first direction is perpendicular to the second direction, so that the operation space is larger and the operation is more convenient.

Description

Technical Field

[0001] This invention relates to the field of rail transit technology, and in particular to a ventilation duct structure for a locomotive traction motor and a locomotive. Background Technology

[0002] Currently, most locomotive traction motors are cooled by airflow to the rotor and windings. The cooling air generated by the traction fan on the vehicle is blown to the traction motor through the steel air duct on the vehicle and the soft air duct connecting the steel air duct and the air inlet of the traction motor. After passing through the rotor and windings of the motor, the cooling air is blown out from the air outlet at the other end, thus achieving the cooling of the traction motor.

[0003] Flexible air ducts are typically installed at one end by bolts to the air outlet of the steel air duct in the car body, with the flange and gasket attached. The other end is installed at the air inlet of the motor using bolts or mounting brackets. Because the distance between the car body underframe and bogies is small after the locomotive is completed, and the operating space of the bogies themselves is also limited, it is very difficult to replace the flexible air ducts without jacking up the locomotive. Usually, the car body is raised to increase the space between the underframe and bogies for air duct replacement, which is time-consuming and labor-intensive.

[0004] Therefore, there is an urgent need for a ventilation duct structure for locomotive traction motors and a locomotive in order to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a ventilation duct structure for a locomotive traction motor and a locomotive, so as to solve the technical problem that the ventilation duct structure for a locomotive traction motor is difficult to install and fix during the assembly process of the car body and bogie.

[0006] On one hand, the present invention provides a ventilation duct structure for a locomotive traction motor, the ventilation duct structure for a locomotive traction motor comprising:

[0007] The flexible air duct assembly includes a flexible hose and a first pressure plate, wherein the axial end of the flexible hose forms a flange extending radially outward from the air passage, and the flange is fixed to the first pressure plate.

[0008] The mounting base has a placement groove, which includes a bottom wall and opposing side walls spaced apart in a first direction. The bottom wall has an air vent, and one of the side walls has a limiting hole along the first direction. The first pressure plate is inserted into the placement groove along the second direction and into the limiting hole along the first direction.

[0009] A locking assembly is installed on another of the aforementioned side walls. The locking assembly includes a locking tongue and an elastic element. The locking tongue is slidably connected to the mounting base along the first direction. When the locking tongue is in the first position, the first pressure plate is clamped between the locking tongue and the bottom wall of the mounting base along the second direction. When the locking tongue is in the second position, the locking tongue and the first pressure plate are spaced apart in the first direction. The elastic element ensures that the locking tongue always has a tendency to move towards the first position. The flange is fixed to the mounting base by the first pressure plate. The air passage of the hose is connected to the air hole.

[0010] The first direction mentioned above is perpendicular to the second direction mentioned above.

[0011] As a preferred embodiment of the ventilation duct structure for the locomotive traction motor, the flange and the first pressure plate are fixed and sealed by a flange structure.

[0012] As a preferred embodiment of the ventilation duct structure for the locomotive traction motor, the flange is sandwiched between the first pressure plate and the bottom wall of the placement groove along the second direction.

[0013] As a preferred embodiment of the ventilation duct structure for the locomotive traction motor, the flexible air duct assembly further includes a sealing ring, which is sandwiched between the flange and the bottom wall of the mounting base.

[0014] As a preferred embodiment of the ventilation duct structure for the locomotive traction motor, it also includes a limiting block, which is fixed to the mounting base. Multiple limiting blocks are provided, with at least two of the limiting blocks spaced apart from opposite sides of the first pressure plate in a third direction. The limiting blocks can abut against the first pressure plate in the third direction.

[0015] The first direction, the second direction, and the third direction mentioned above are all perpendicular to each other.

[0016] As a preferred embodiment of the ventilation duct structure for the locomotive traction motor, the locking assembly further includes a mounting bracket and a locking nut. The mounting bracket is fixed to the mounting base, and one end of the locking tongue passes through the mounting bracket and is threadedly connected to the locking nut. The locking nut can abut against the mounting bracket in the second direction.

[0017] As a preferred embodiment of the ventilation duct structure for the locomotive traction motor, the locking tongue forms a guide surface on one side of the bottom wall of the placement slot, the first pressure plate applies a force to the guide surface in the second direction, and the guide surface can generate a component force in the first direction.

[0018] As a preferred embodiment of the ventilation duct structure for the locomotive traction motor, the flexible duct assembly further includes a handrail, which is fixed to the first pressure plate and located around the flexible hose.

[0019] On the other hand, a locomotive is also provided, including a body, a bogie, and the aforementioned ventilation duct structure for a locomotive traction motor. The body, the aforementioned ventilation duct structure for a locomotive traction motor, and the aforementioned bogie are assembled along the aforementioned second direction. The steel ventilation duct of the body and the air inlet of the traction motor of the bogie are connected through the aforementioned ventilation duct structure for a locomotive traction motor.

[0020] As a preferred embodiment of the locomotive, two mounting seats are provided, with the mounting seats installed at both ends of the hose. One of the mounting seats is connected to the end face of the steel air duct via a flange structure, and the other mounting seat is connected to the end face of the air inlet of the traction motor via a flange structure.

[0021] The ventilation duct structure for locomotive traction motors provided by this invention has at least the following beneficial effects:

[0022] This application provides a locomotive, including a body, a bogie, and a ventilation duct structure for the locomotive traction motor. The body, the ventilation duct structure, and the bogie are assembled along a second direction. The steel ventilation duct of the body is connected to the air inlet of the traction motor of the bogie through the ventilation duct structure. The ventilation duct structure for the locomotive traction motor includes: a flexible ventilation duct assembly, a mounting base, and a locking assembly. The flexible air duct assembly includes a flexible hose and a first pressure plate. The axial end of the flexible hose forms a flange extending radially outward from the air passage, and the flange is fixed to the first pressure plate. The mounting base has a placement groove, which includes a bottom wall and two opposing side walls spaced apart in a first direction. The bottom wall has an air passage hole, and one side wall has a limiting hole along the first direction. The first pressure plate is inserted into the placement groove along a second direction and into the limiting hole along the first direction. A locking assembly is mounted on the other side wall. The locking assembly includes a locking tongue and an elastic element. The locking tongue is slidably connected to the mounting base along the first direction. When the locking tongue is in the first position, the first pressure plate is clamped between the locking tongue and the bottom wall of the mounting base along the second direction. When the locking tongue is in the second position, the locking tongue and the first pressure plate are spaced apart in the first direction. The elastic element ensures that the locking tongue always tends to move towards the first position. The air passage of the flexible hose is connected to the air passage hole. The first direction is perpendicular to the second direction.

[0023] For example, the mounting bracket is used for mounting on the vehicle body and bogie. The mounting slot of the mounting bracket includes a bottom wall and two side walls spaced apart in a first direction. The two side walls are fixed to the bottom wall and are referred to as the first side wall and the second side wall, respectively. The first side wall has a limiting hole along the first direction. A first pressure plate is inserted into the mounting slot along the second direction and into the limiting hole along the first direction. The inner peripheral wall of the limiting hole can restrict the movement of one end of the first pressure plate in the first direction relative to the mounting seat in a direction perpendicular to the first direction. The other end of the first pressure plate in the first direction can be clamped between the latch and the bottom wall to restrict its relative movement with the mounting seat in the second direction. The second side wall can abut against the first pressure plate in the first direction to restrict the movement of the first pressure plate relative to the mounting seat in the first direction. At the same time, the friction between the first pressure plate and the latch and the bottom wall also restricts the movement of the first pressure plate relative to the mounting seat in a direction perpendicular to the second direction, thereby ensuring reliable assembly between the flexible air duct assembly and the mounting seat. Since the latch's opening and closing structure is relatively simple and easy to operate, the assembly process is simplified.

[0024] During assembly, the vehicle body is assembled with the bogie along the second direction, and the first pressure plate is inserted into the mounting slot. Then, the first pressure plate is moved along the first direction so that it is inserted into the limiting hole. Then, the locking tongue is moved to the first position so that the locking tongue locks the first pressure plate. Since the first pressure plate and the locking tongue are adjusted along the first direction during the subsequent locking process, and the first direction is perpendicular to the second direction, there is a larger operating space and it is easier to operate. Attached Figure Description

[0025] Figure 1 This is an axonometric view of the ventilation duct structure for the locomotive traction motor in an embodiment of the present invention;

[0026] Figure 2 This is a front view of the ventilation duct structure for the locomotive traction motor in an embodiment of the present invention;

[0027] Figure 3 This is an axonometric view of the hose in an embodiment of the present invention;

[0028] Figure 4 This is a front view of the hose in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the assembly of the first pressure plate and the handrail in an embodiment of the present invention;

[0030] Figure 6 This is an axonometric view of the mounting base and locking assembly in an embodiment of the present invention;

[0031] Figure 7 This is a top view of the mounting base and locking assembly in an embodiment of the present invention.

[0032] In the picture:

[0033] X, first direction; Y, second direction; Z, third direction;

[0034] 1. Flexible air duct assembly; 11. Flexible hose; 111. Flanged edge; 112. Air passage; 113. Corrugated section; 114. Neck; 12. First pressure plate; 13. Sealing ring; 14. Handrail;

[0035] 2. Mounting base; 21. Placement slot; 22. Bottom wall; 221. Vent hole; 23. First side wall; 231. Limiting hole; 24. Second side wall;

[0036] 3. Locking assembly; 31. Locking tongue; 32. Elastic element; 33. Mounting bracket; 34. Locking nut;

[0037] 4. Limit block. Detailed Implementation

[0038] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0042] This application provides a locomotive, including a body, a bogie, and a ventilation duct structure for a locomotive traction motor. The body, the ventilation duct structure for a locomotive traction motor, and the bogie are assembled along a second direction Y. The steel ventilation duct of the body and the air inlet of the traction motor of the bogie are connected through the ventilation duct structure for a locomotive traction motor.

[0043] like Figures 1 to 7 As shown, this application provides a ventilation duct structure for a locomotive traction motor, including a flexible air duct assembly 1, a mounting base 2, and a locking assembly 3. The flexible air duct assembly 1 includes a flexible hose 11 and a first pressure plate 12. The axial end of the flexible hose 11 forms a flange 111 extending radially outward from the air passage 112, and the flange 111 is fixed to the first pressure plate 12. The mounting base 2 has a placement groove 21, which includes a bottom wall 22 and opposing side walls spaced apart in a first direction X. The bottom wall 22 has an air passage hole 221, and one side wall has a limiting hole 231 along the first direction X. The first pressure plate 12 is inserted into the placement groove 21 along the second direction Y and into the limiting hole 231 along the first direction X. The locking assembly... 3. Installed on another side wall, the locking assembly 3 includes a locking tongue 31 and an elastic element 32. The locking tongue 31 is slidably connected to the mounting base 2 along the first direction X. When the locking tongue 31 is in the first position, the first pressure plate 12 is clamped between the locking tongue 31 and the bottom wall 22 of the mounting base 2 along the second direction Y. When the locking tongue 31 is in the second position, the locking tongue 31 and the first pressure plate 12 are spaced apart in the first direction X. The elastic element 32 makes the locking tongue 31 always have a tendency to move towards the first position. The air passage 112 of the hose 11 is connected to the air hole 221. The first direction X is perpendicular to the second direction Y.

[0044] For example, the mounting bracket 33 is used for mounting on the vehicle body and bogie. The mounting groove of the mounting bracket 33 includes a bottom wall 22 and two side walls spaced apart in the first direction X. The two side walls are fixed to the bottom wall 22 and are respectively referred to as the first side wall 23 and the second side wall 24. The first side wall 23 has a limiting hole 231 along the first direction X. The first pressure plate 12 is inserted into the mounting groove along the second direction Y. The first pressure plate 12 is inserted into the limiting hole 231 along the first direction X. The inner peripheral wall of the limiting hole 231 can restrict one end of the first pressure plate 12 in the first direction X to be perpendicular to the first direction X. As the first pressure plate 12 moves relative to the mounting base 2, the other end of the first pressure plate 12 in the first direction X can be clamped between the latch 31 and the bottom wall 22, thus restricting its relative movement with respect to the mounting base 2 in the second direction Y. The second side wall 24 can abut against the first pressure plate 12 in the first direction X, thereby restricting the movement of the first pressure plate 12 relative to the mounting base 2 in the first direction X. At the same time, the friction between the first pressure plate 12 and the latch 31 and the bottom wall 22 also restricts the movement of the first pressure plate 12 relative to the mounting base 2 in the direction perpendicular to the second direction Y, thereby ensuring reliable assembly between the flexible air duct assembly 1 and the mounting base 2. Since the locking and unlocking structure of the latch 31 is relatively simple and easy to operate, the assembly process is simplified.

[0045] During assembly, the vehicle body is assembled with the bogie along the second direction Y, and the first pressure plate 12 is inserted into the placement slot 21. Then, the first pressure plate 12 is moved along the first direction X so that the first pressure plate 12 is inserted into the limiting hole 231. Then, the locking tongue 31 is moved to the first position so that the locking tongue 31 locks the first pressure plate 12. Since the first pressure plate 12 and the locking tongue 31 are adjusted along the first direction X during the subsequent locking process, and the first direction X is perpendicular to the second direction Y, the operating space is larger and the operation is easier.

[0046] Optionally, the flange 111 is fixed and sealed to the first pressure plate 12 via a flange structure. This arrangement makes the connection between the flange 111 and the first pressure plate 12 more reliable.

[0047] Optionally, the flange 111 is clamped between the first pressure plate 12 and the bottom wall 22 of the placement groove 21 along the second direction Y.

[0048] For example, the hose 11 is a corrugated pipe. The hose 11 includes a corrugated portion 113, a neck 114 and a flange 111 along the axial direction. The first pressure plate 12 is sleeved on the neck 114. The flange 111 is located on the side of the first pressure plate 12 opposite to the corrugated portion 113. When the first plate is assembled with the mounting base 2, the flange 111 is sandwiched between the first pressure plate 12 and the mounting base 2. In this way, the air passage 112 of the hose 11 is directly connected to the air passage 221 of the mounting base 2, reducing the transfer of intermediate parts and thus reducing the number of leakage points.

[0049] Optionally, the flexible air duct assembly 1 also includes a sealing ring 13, which is sandwiched between the flange 111 and the bottom wall 22 of the mounting base 2.

[0050] For example, the sealing gasket is made of rubber, the sealing ring 13 is sleeved on the hose 11, and the sealing gasket is bonded to the flange 111 and / or the bottom wall 22 of the mounting base 2. When the flange 111 and the bottom wall 22 of the mounting base 2 abut against each other in the second direction Y, the sealing gasket is sandwiched between the two. The sealing gasket achieves a sealing effect by undergoing elastic deformation to fill the gap between the two.

[0051] Optionally, the ventilation duct structure for the locomotive traction motor also includes a limiting block 4, which is fixed to the mounting base 2. Multiple limiting blocks 4 are provided, with at least two limiting blocks 4 spaced apart on opposite sides of the first pressure plate 12 in the third direction Z. The limiting blocks 4 can abut against the first pressure plate 12 in the third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0052] With this configuration, the two limiting blocks 4, spaced apart in the third direction Z, limit the first pressure plate 12 in the third direction Z, keeping the first pressure plate 12 and the mounting base 2 relatively fixed, and maintaining the alignment of the air passage 112 of the hose 11 with the air hole 221 of the mounting base 2.

[0053] Optionally, the locking assembly 3 also includes a mounting bracket 33 and a locking nut 34. The mounting bracket 33 is fixed to the mounting base 2. One end of the locking tongue 31 passes through the mounting bracket 33 and is threadedly connected to the locking nut 34. The locking nut 34 can abut against the mounting bracket 33 in the first direction X.

[0054] For example, the mounting bracket 33 includes a support beam and a crossbeam. Two support beams are provided, fixed to the beginning and end of the crossbeam respectively. The support beams are fixed to the mounting bracket 33 and installed on the side of the second sidewall 24 of the placement groove 21 opposite to the first sidewall 23, i.e., outside the placement groove 21. The crossbeam and the mounting base 2 are spaced apart. The locking tongue 31 is simultaneously inserted into the second sidewall 24 and the crossbeam. The second sidewall 24 has a rectangular hole, and one end of the locking tongue 31 is correspondingly rectangular, inserted into the rectangular hole to restrict the locking tongue 31. 1. The locking tongue 31 rotates around its own axis. The other end of the locking tongue 31 extends to the side of the crossbeam opposite to the mounting base 2 and is threadedly connected to the locking nut. The elastic element 32 is located on the side of the crossbeam opposite to the locking nut and is sandwiched between the locking tongue 31 and the crossbeam. Thus, by rotating the locking nut, the locking tongue 31 can be driven to move relative to the mounting bracket 33 along the first direction X, thereby adjusting the extension of the locking tongue 31. When the locking nut and the crossbeam abut against each other along the first direction X, the locking tongue 31 can no longer extend into the placement groove 21.

[0055] Optionally, the locking tongue 31 forms a guide surface on the side opposite to the bottom wall 22 of the placement groove 21, and the first pressure plate 12 applies a force to the guide surface in the second direction Y, so that the guide surface can generate a component force in the first direction X.

[0056] With this configuration, when the first pressure plate 12 is placed in the placement groove 21 along the second direction Y, the first pressure plate 12 applies a force to the locking tongue 31 located in the first position along the second direction Y. This force generates a force along the first direction X through the guide surface, causing the elastic element 32 to deform and drive the locking tongue 31 to move to the second position. When the first pressure plate 12 is in close contact with the bottom wall 22 of the mounting base 2, the guide surface loses the force applied by the first pressure plate 12, and the elastic element 32 recovers its deformation, pushing the locking tongue 31 to the first position and locking the first pressure plate 12.

[0057] Optionally, the flexible air duct assembly 1 also includes a handrail 14, which is fixed to the first pressure plate 12 and located around the flexible hose 11.

[0058] For example, during assembly, the distance between the first pressure plate 12 and the bottom wall 22 of the mounting base 2 in the second direction Y is small, making it inconvenient for the operator to hold and adjust the position of the first pressure plate 12. The handrail 14 provides support for the operator and assists in the installation. The handrail 14 can also prevent the hose 11 from overflowing and coming into contact with other parts and rubbing against them, thus preventing damage.

[0059] Optionally, two mounting bases 2 are provided, with mounting bases 2 installed at both ends of the flexible hose 11. One mounting base 2 is connected to the end face of the steel air duct via a flange structure; the other mounting base 2 is connected to the end face of the traction motor's air inlet via a flange structure. This arrangement makes the connection between the steel air duct, the ventilation duct structure for the locomotive traction motor, and the air inlet of the traction motor more reliable, less prone to loosening, and provides relatively strong sealing.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A ventilation duct structure for a locomotive traction motor, characterized in that, include: The flexible air duct assembly (1) includes a flexible hose (11) and a first pressure plate (12). The axial end of the flexible hose (11) forms a flange (111) extending radially outward from the air passage (112) of the flexible hose (11). The flange (111) is fixed to the first pressure plate (12). The mounting base (2) has a placement groove (21). The placement groove (21) includes a bottom wall (22) and two opposing side walls spaced apart in a first direction (X). The bottom wall (22) has an air vent (221). One of the side walls has a limiting hole (231) along the first direction (X). The first pressure plate (12) is inserted into the placement groove (21) along the second direction (Y) and into the limiting hole (231) along the first direction (X). A locking assembly (3) is installed on another side wall. The locking assembly (3) includes a latch (31) and an elastic element (32). The latch (31) is slidably connected to the mounting base (2) along the first direction (X). When the latch (31) is in the first position, the first pressure plate (12) is sandwiched between the latch (31) and the bottom wall (22) of the mounting base (2) along the second direction (Y). When the latch (31) is in the second position, the latch (31) and the first pressure plate (12) are spaced apart in the first direction (X). The elastic element (32) makes the latch (31) always have a tendency to move towards the first position. The flange (111) is fixed to the mounting base (2) by the first pressure plate (12). The air passage (112) is connected to the air hole (221). It also includes a limiting block (4), which is fixed to the mounting base (2). Multiple limiting blocks (4) are provided, and at least two of the limiting blocks (4) are spaced apart on opposite sides of the first pressure plate (12) in the third direction (Z). The limiting blocks (4) can abut against the first pressure plate (12) along the third direction (Z). The first direction (X), the second direction (Y), and the third direction (Z) are all perpendicular to each other; The locking assembly (3) further includes a mounting bracket (33) and a locking nut (34). The mounting bracket (33) is fixed to the mounting base (2). One end of the locking tongue (31) passes through the mounting bracket (33) and is threadedly connected to the locking nut (34). The locking nut (34) can abut against the mounting bracket (33) along the first direction (X).

2. The ventilation duct structure for a locomotive traction motor according to claim 1, characterized in that, The flange (111) is fixed and sealed to the first pressure plate (12) by a flange structure.

3. The ventilation duct structure for a locomotive traction motor according to claim 2, characterized in that, The flange (111) is sandwiched between the first pressure plate (12) and the bottom wall (22) of the placement groove (21) along the second direction (Y).

4. The ventilation duct structure for a locomotive traction motor according to claim 3, characterized in that, The flexible air duct assembly (1) also includes a sealing ring (13), which is sandwiched between the flange (111) and the bottom wall (22) of the mounting base (2).

5. The ventilation duct structure for a locomotive traction motor according to claim 1, characterized in that, The locking tongue (31) forms a guide surface on the side opposite to the bottom wall (22) of the placement groove (21), and the first pressure plate (12) applies a force to the guide surface in the second direction (Y), and the guide surface can generate a component force in the first direction (X).

6. The ventilation duct structure for a locomotive traction motor according to claim 1, characterized in that, The flexible air duct assembly (1) also includes a handrail (14), which is fixed to the first pressure plate (12) and located on the periphery of the flexible hose (11).

7. A locomotive, characterized in that, The system includes a car body, a bogie, and a ventilation duct structure for a locomotive traction motor as described in any one of claims 1-6. The car body, the ventilation duct structure for the locomotive traction motor, and the bogie are assembled along the second direction (Y). The steel ventilation duct of the car body is connected to the air inlet of the traction motor of the bogie through the ventilation duct structure for the locomotive traction motor.

8. The locomotive according to claim 7, characterized in that, There are two mounting bases (2). The mounting bases (2) are installed at both ends of the hose (11). One of the mounting bases (2) is connected to the end face of the steel air duct through a flange structure; the other mounting base (2) is connected to the end face of the air inlet of the traction motor through a flange structure.

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