Press-in type cooling soft air duct

Abstract

This utility model discloses a snap-fit ​​type flexible cooling duct, relating to the field of electric locomotive technology. It includes a flexible duct body, a flexible duct frame, and an auxiliary locking assembly. The flexible duct body consists of a supporting frame and inner and outer flame-retardant fabric coverings. The flexible duct frame includes an inner flexible duct frame and an outer flexible duct frame. The auxiliary locking assembly is a screwless snap-fit ​​structure, including a locking assembly shell, guide slide, guide slide plate, snap plate with snap groove, buckle, and connecting rod with positioning components. This utility model replaces the traditional screw fixing method with a mechanical locking structure using flame-retardant fabric covering the inner and outer sides of the supporting frame and snap grooves and buckles. It has advantages such as stable connection, strong airtightness, and fire resistance, effectively extending the service life of the flexible duct and preventing damage to the motor from component detachment. Simultaneously, the auxiliary locking assembly enables quick assembly and disassembly, significantly improving maintenance efficiency.

Description

Technical Field

[0001] This utility model relates to the field of electric locomotive technology, specifically to a crimped cooling flexible air duct. Background Technology

[0002] The flexible air duct for electric locomotive motors is a duct structure used for ventilation and cooling of the traction motors of this type of electric locomotive. Its main function is to guide the cooling airflow to the traction motor, remove the heat generated during motor operation, prevent the motor from overheating, ensure its stable operation within the normal temperature range, and improve the motor's efficiency and service life.

[0003] Currently, the traction motor flexible air ducts used in AC locomotives are made of a single layer of rubber sheeting, with steel wire rings used to integrate the pleats. They are then fixed to the traction motor with screws to achieve a sealing effect. Vibrations generated during locomotive operation cause friction between the fixing screws and the flexible air duct fabric. Over time, this friction can wear through the single layer of fabric, and in severe cases, structural tearing can cause the flexible air duct to separate, reducing its lifespan. Prolonged vibration can also cause the fixing screws to fall off or break. These loose or broken screws not only cause the connection between the flexible air duct and the traction motor to fail, leading to air leakage and reduced sealing, resulting in insufficient motor cooling, but also risk falling into the motor and causing damage. Utility Model Content

[0004] The purpose of this utility model is to provide a crimped cooling flexible air duct to solve the problems mentioned in the background art, such as the wear of the flexible air duct fabric by the fixing screws, and the reduction of motor air tightness caused by screw breakage or falling off, or the damage to the motor caused by screws falling into the motor.

[0005] To achieve the above objectives, this utility model provides a snap-fit ​​type flexible cooling duct, including a flexible cooling duct body, a flexible duct frame, a traction motor connection port, and auxiliary locking components. The flexible cooling duct body includes a support frame and flame-retardant fabric, with the flame-retardant fabric covering the inner and outer sides of the support frame. The flexible duct frame includes an outer flexible duct frame and an inner flexible duct frame, both of which are hollow rectangular structures. The outer flexible duct frame is positioned above the flexible cooling duct body, and the inner flexible duct frame is positioned inside the outer flexible duct frame. The traction motor connection port is a cylindrical structure with a rectangular cross-section, positioned above the outer flexible duct frame.

[0006] The auxiliary locking component is located on the outside of the connection between the flexible air duct outer frame and the traction motor connection port.

[0007] Preferably, the auxiliary locking assembly includes a locking assembly housing, a guide column, a guide slide plate, a buckle plate, a latch, and a connecting rod. The locking assembly housing has a regular box-like structure and is fixed to the outside of the flexible air duct outer frame. The guide column has a cylindrical structure and is located in the middle of the locking assembly housing. The guide slide plate has a slide plate hole in the middle that matches the cross-section of the guide column, and the guide column passes through the slide plate hole. The buckle plate is fixed to the outside of the traction motor connection port, and the buckle plate has buckle slots. There are two sets of buckle slots, and the two sets of buckle slots are located on both sides of the buckle plate. There are two sets of latches, and the two sets of latches are located on both sides of the upper surface of the guide slide plate, and the two sets of latches and the two sets of buckle slots correspond to and match each other. The connecting rod is located between the two sets of latches, and a fixing component is provided in the middle of the connecting rod for fixing the connecting rod.

[0008] Preferably, the positioning assembly includes a threaded hole, a threaded rod, a rotating cap, an extension ring, and a positioning ring. The threaded hole is located in the middle of the connecting rod, and the threaded hole and the threaded rod are fixedly connected by threads that match. The threaded rod has a rotating cap at its top and an extension ring at its bottom. The positioning ring is located on the top surface of the locking assembly housing, and the extension ring matches the size of the positioning ring and can be inserted into the positioning ring for fixation.

[0009] Preferably, the inner frame of the flexible air duct is a mounting groove structure made of bent steel plate, and the mounting groove structure matches the connection size of the traction motor connection port. A sealing strip is provided between the inner frame and the outer frame of the flexible air duct.

[0010] Preferably, the lower surface of the groove and the upper surface of the buckle are matching bevels, and the bevel surfaces are smooth.

[0011] Preferably, a return spring is provided on the outer periphery of the guide slide column, the axis of the return spring coincides with the axis of the guide slide column, and the two ends of the return spring are respectively fixed to the inner wall of the guide slide plate and the locking assembly housing to form an elastic connection structure.

[0012] Preferably, the outer diameter of the extension ring is larger than the inner diameter of the threaded hole.

[0013] This utility model has the following advantages over the prior art:

[0014] 1. This utility model adopts a snap-locking structure (auxiliary locking component) to replace the traditional screw fixing. The mechanical locking is achieved by the cooperation of the buckle and the snap groove, which improves the connection stability of the device, avoids direct contact between the flexible air duct fabric layer and the screw, eliminates the risk of the flexible air duct separating from the upper and lower parts due to the friction of the screw on the flexible air duct fabric layer, and greatly extends the service life of the flexible air duct.

[0015] 2. The snap-locking structure of this utility model ensures connection stability through a screwless design and a fixing method that combines the threaded rod with the positioning ring. A sealing strip is installed between the outer and inner frames of the flexible air duct. The extension ring at the lower end of the threaded rod is inserted into the positioning ring to form an interlock. Combined with the screwless design, this avoids air leakage caused by connection failure due to screw breakage or detachment, ensuring the airtightness of motor cooling. The outer diameter of the extension ring is larger than the inner diameter of the threaded hole to prevent the threaded rod from falling into the motor.

[0016] 3. This utility model improves the fire safety of the device by covering the support frame with flame-retardant cloth, and locks or releases the positioning component by rotating the rotating cap to drive the threaded rod to rise or fall, which facilitates quick disassembly and maintenance, greatly reduces maintenance difficulty and time cost, and meets the safety requirements of locomotives in high-temperature environments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the layered structure of this utility model;

[0019] Figure 3 This is a partial cross-sectional structural diagram of the present invention;

[0020] Figure 4 This is a schematic diagram of the traction motor connection port of this utility model;

[0021] Figure 5 This utility model Figure 3 Enlarged view of point A in the middle.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1—Cooling flexible air duct main body; 11—Main air duct; 12—Air duct layout;

[0024] 13—Support frame; 14—Connecting flange; 2—Flexible duct sleeve;

[0025] 21—Framed air duct; 22—Sealing groove; 23—Sealing gasket;

[0026] 3—Traction motor connection port; 4—Auxiliary locking assembly; 4-1—First locking component;

[0027] 4-2—Second locking component; 41—Locking assembly housing; 42—Guide slide;

[0028] 43—Guide slide; 44—Slide hole; 45—Snap plate;

[0029] 46—Matching groove; 46-1—First snap groove; 46-2—Second snap groove;

[0030] 47—Snap fastener; 47-1—First snap fastener; 47-2—Second snap fastener;

[0031] 48—Connecting rod; 49—Return spring; 5—Positioning assembly;

[0032] 51—Threaded hole; 52—Threaded rod; 53—Rotating cap;

[0033] 54—Extension ring; 55—Positioning ring; 6-1—First outer shell opening;

[0034] 6-2—Second outer shell opening; 71—Snap-on bevel; 72—Snap-on plate bevel. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0036] like Figures 1 to 5 As shown, this utility model provides a snap-fit ​​type flexible cooling duct, including a flexible cooling duct body 1, a flexible duct frame 2, a traction motor connection port 3, and an auxiliary locking component 4. The flexible cooling duct body 1 includes a support frame 11 and a flame-retardant cloth 12, with the flame-retardant cloth 12 covering the inner and outer sides of the support frame 11. The flexible duct frame 2 includes an outer flexible duct frame 21 and an inner flexible duct frame 22, both of which are hollow rectangular structures. The outer flexible duct frame 21 is positioned above the flexible cooling duct body 1, and the inner flexible duct frame 22 is positioned inside the outer flexible duct frame 21. The traction motor connection port 3 is a cylindrical structure with a rectangular cross-section and is positioned above the outer flexible duct frame 21. The auxiliary locking component 4 is positioned on the outside of the connection between the outer flexible duct frame 21 and the traction motor connection port 3.

[0037] Flame-retardant fabric 12 covers the inner and outer sides of the support frame 11, and includes a fiberglass layer and a silicone layer. By changing the material of the flame-retardant fabric, the toughness and fire resistance of the cooling flexible air duct are increased, improving the overall stability and effectively extending the service life of the equipment. By installing a flexible air duct outer frame 21 and a flexible air duct inner frame 22 on the cooling flexible air duct body 1, the traditional flexible air duct screw fixing structure is optimized into a snap-fit ​​installation structure, which facilitates quick installation and disassembly of the cooling flexible air duct body 1, reduces the difficulty of replacing the cooling flexible air duct body 1, and fundamentally avoids the friction of screws on the flexible air duct fabric layer.

[0038] like Figures 3 to 5 As shown, the auxiliary locking assembly 4 includes a locking assembly housing 41, a guide slide post 42, a guide slide plate 43, a buckle plate 45, a latch 47, and a connecting rod 48. The locking assembly housing 41 has a regular box-shaped structure and is fixed to the outside of the flexible air duct outer frame 21. The guide slide post 42 has a cylindrical structure and is located in the middle of the interior of the locking assembly housing 41. The guide slide plate 43 has a slide plate hole 44 in the middle that matches the cross-section of the guide slide post 42, and the guide slide post 42 passes through the slide plate hole 44. The buckle plate 45 is fixed to the outside of the traction motor 3 connection part, and the buckle plate 45 has buckle grooves 46. There are two sets of buckle grooves 46, and the two sets of buckle grooves 46 are located on both sides of the buckle plate 45. There are two sets of latches 47, and the two sets of latches 47 are located on both sides of the upper end of the guide slide plate 43. The two sets of latches 47 correspond to and engage with the two sets of buckle grooves 46. The connecting rod 48 is positioned between two sets of latches 47, and a positioning component 5 is provided in the middle of the connecting rod 48 for fixing the connecting rod 48.

[0039] When the flexible air duct sleeve 2 is connected to the traction motor connection port, the flexible air duct outer sleeve 21 is provided with two sets of movable buckles 47. The two sets of buckles 47 move into the buckle grooves 46 under the action of the inclined plane, and the two sets of buckles 47 match and engage with the two sets of buckle grooves 46, thereby improving the stability of the device connection.

[0040] like Figure 5 As shown, the positioning assembly 5 includes a threaded hole 51, a threaded rod 52, a rotating cap 53, an extension ring 54, and a positioning ring 55. The threaded ring 51 is located in the middle of the connecting rod 48, and the threaded hole 51 and the threaded rod 52 are fixedly connected by threads and the threads are matched.

[0041] By setting a liftable threaded rod 52 in the middle of the connecting rod 48, when the two sets of buckles 47 are matched and engaged with the two sets of buckle slots 46, the connecting rod 48 drives the threaded rod to move above the positioning ring 55. The rotating cap 53 drives the threaded rod 52 to move down, so that the extension ring 54 is inserted into the positioning ring 55 and fixed, thereby fixing the position of the two sets of buckles 47 and improving the stability when the buckles 47 and buckle slots 46 are engaged.

[0042] like Figure 2As shown, the inner frame 22 of the flexible air duct adopts a mounting groove structure made of steel plate bending. The mounting groove structure matches the connection port size of the traction motor connection port 3. A sealing strip 23 is provided between the inner frame 22 of the flexible air duct and the outer frame 21 of the flexible air duct.

[0043] By using a mounting groove structure that matches the size of the connection port 3 on the traction motor connection port, the inner sleeve 22 of the flexible air duct is inserted into the traction motor connection port 3, which fixes the inner sleeve 6 of the flexible air duct inside the connection port of the traction motor connection port 3, improving the airtightness of the cooling flexible air duct device when connected to the traction locomotive. When the traction machine is working, the outer sleeve 21 of the flexible air duct, in conjunction with the sealing strip 23, further enhances the airtightness of the device.

[0044] like Figure 4 and Figure 5 As shown, the lower surface of the groove 46 and the upper surface of the buckle 47 are mutually matching bevels and the bevel surfaces are smooth.

[0045] By designing a sloping structure and polishing the sloping surface to make it smooth, when the flexible air duct sleeve 2 is connected to the traction motor connection port 3, the two sets of buckles 47 can quickly enter the two sets of buckle slots 46 and engage, without the need to manually adjust the position of the buckles 47 and engage with the buckle slots 46.

[0046] like Figure 5 As shown, a return spring 6 is provided on the outer periphery of the guide slide 42, and the axis of the return spring 6 coincides with the axis of the guide slide 42. The two ends of the return spring 6 are respectively fixed to the guide slide 43 and the inner wall of the locking assembly housing 41 to form an elastic connection structure.

[0047] With one end of the return spring 6 connected to the guide slide plate 43 and the other end connected to the inner wall of the locking assembly housing 41, the two sets of latches 47 can move under the action of their external inclined surfaces, and the guide slide plate 43 compresses the return spring 6, applying a force to the guide slide plate 43 in the direction of the flexible air duct outer frame 21. When the two sets of latches 47 move into the latch groove 49, the elastic restoring force of the return spring 6 drives the guide slide plate 43 to move along the axial direction of the return spring 6 and causes the latches 47 to insert into the latch groove 46 and engage, thereby improving the stability of the device connection.

[0048] like Figure 5 As shown, the outer diameter of the extension ring 54 is larger than the inner diameter of the threaded hole 51.

[0049] The design of the extension ring 54 with a larger outer diameter can prevent the threaded rod 52 from falling out of the threaded hole 51 and being lost, and can also avoid the risk of the threaded rod 52 falling into the traction motor after falling out and causing damage to the motor.

[0050] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A crimped cooling flexible air duct, wherein the crimped cooling flexible air duct is connected to the traction motor connection port (3), characterized in that, include: Cooling flexible air duct body (1), the cooling flexible air duct body (1) is provided with a main air duct (11) for conveying cooling air; A flexible air duct frame (2) is provided. One end of the flexible air duct frame (2) is connected to one end of the cooling flexible air duct body (1), and the other end of the flexible air duct frame (2) is engaged with the traction motor connection port (3). A frame air duct (21) is provided inside the flexible air duct frame (2). One end of the frame air duct (21) is connected to the main air duct (11), and the other end of the frame air duct (21) is connected to the traction motor connection port (3). A sealing groove (22) matching the traction motor connection port (3) is provided at the end of the flexible air duct frame (2) near the traction motor connection port (3). The auxiliary locking component (4) includes a first locking component (4-1) and a second locking component (4-2) that matches and engages with the first locking component (4-1). The first locking component (4-1) is fixedly mounted on the traction motor connection port (3), and the second locking component (4-2) is fixedly mounted on the flexible air duct sleeve frame (2). The second locking component (4-2) is positioned corresponding to the first locking component (4-1).

2. The crimped cooling flexible air duct according to claim 1, characterized in that: The first locking component (4-1) has a latch groove (46) on its upper part, and the second locking component (4-2) includes a buckle (47), wherein the buckle (47) and the latch groove (46) are engaged with each other.

3. The crimped cooling flexible air duct according to claim 2, characterized in that: There are two buckle slots (46), namely the first buckle slot (46-1) and the second buckle slot (46-2). The first buckle slot (46-1) and the second buckle slot (46-2) are respectively located at both ends of the first locking component (4-1). There are also two buckles (47), namely the first buckle (47-1) and the second buckle (47-2). The first buckle slot (46-1) and the first buckle (47-1) are engaged with each other, and the second buckle slot (46-2) and the second buckle (47-2) are engaged with each other.

4. The crimped cooling flexible air duct according to claim 3, characterized in that: The second locking component (4-2) further includes a locking assembly housing (41), a guide slide plate (43), a guide slide post (42), and a return spring (49). The locking assembly housing (41) is disposed on the outside of the flexible air duct frame (2), and the guide slide plate (43) is disposed inside the locking housing (41). The direction of the guide slide plate (43) is parallel to the connection surface between the locking assembly housing (41) and the flexible air duct frame (2). The first buckle (47-1) is fixed to the upper part of one end of the guide slide plate (43), and the second buckle (47-2) is fixed to the upper part of the other end of the guide slide plate (43). The guide slide plate (43) has a slide plate hole (44) in the middle, and the guide slide post (42) passes through the slide plate hole (44). Both ends of the guide slide post (42) are fixedly connected to the locking assembly housing (41), and the direction of the guide slide post (42) is perpendicular to the connection surface between the locking assembly housing (41) and the flexible air duct frame (2). The return spring (49) is fitted on the guide slide post (42), and one end of the return spring (49) is connected to the guide slide plate (43), and the other end of the return spring (49) is connected to the inner wall of the locking assembly housing (41) away from the flexible air duct frame (2).

5. A crimped cooling flexible air duct according to claim 4, characterized in that: A first housing opening (6-1) is provided on one side of the top surface of the locking component housing (41), and a second housing opening (6-2) is provided on the other side of the top surface of the locking component housing (41). Both the first housing opening (6-1) and the second housing opening (6-2) are elongated, and the length direction of both the first housing opening (6-1) and the second housing opening (6-2) is perpendicular to the connection surface between the locking component housing (41) and the flexible air duct frame (2). One end of the first buckle (47-1) is fixedly connected to the guide slide plate (43), and the other end of the first buckle (47-1) passes through the first housing opening (6-1) and engages with the first buckle groove (46-1). One end of the second buckle (47-2) is fixedly connected to the guide slide plate (43), and the other end of the second buckle (47-2) passes through the second housing opening (6-2) and engages with the second buckle groove (46-2).

6. The crimped cooling flexible air duct according to claim 3, characterized in that: The second locking component (4-2) further includes a connecting rod (48) and a positioning component (5). The positioning component (5) is mounted on the connecting rod (48) and is used to fix the connecting rod (48) at a predetermined position on the locking component housing (41). The connecting rod (48) is disposed between the first latch (47-1) and the second latch (47-2). One end of the connecting rod (48) is fixedly connected to the first latch (47-1), and the other end of the connecting rod (48) is fixedly connected to the second latch (47-2). The connecting rod (48) is located on the outside of the locking component housing (41).

7. A crimped cooling flexible air duct according to claim 6, characterized in that: The positioning component (5) includes a threaded rod (52), a rotating cap (53), an extension ring (54), and a positioning ring (55). The connecting rod (48) has a threaded hole (51) in the middle. The threaded rod (52) is connected to the threaded hole (51) by a thread. The direction of the threaded rod (52) is perpendicular to the top surface of the locking component housing (41). One end of the threaded rod (52) is provided with a rotating cap (53), and the other end of the threaded rod (52) is provided with an extension ring (54). The outer diameter of the extension ring (54) is larger than the inner diameter of the threaded hole (51), and the extension ring (54) can be used to prevent the threaded rod (52) from falling out of the threaded hole (51). The positioning ring (55) is fixed at a predetermined position on the top surface of the locking component housing (41). The extension ring (54) matches the size of the positioning ring (55), and the extension ring (54) can be embedded and fixed inside the positioning ring (55).

8. A crimped cooling flexible air duct according to claim 1, characterized in that: The main body (1) of the cooling flexible air duct also includes an air duct sleeve (12), a support frame (13) and a connecting flange (14). The flexible air duct sleeve (12) is composed of two layers of flame-retardant cloth overlapping each other. The support frame (13) is disposed between the two layers of flame-retardant cloth of the air duct sleeve (12) and the support frame (13) is used to provide support for the air duct sleeve (12). The number of support frames (13) is at least two. The connecting flange (14) is fixedly disposed at one end of the air duct sleeve (12) away from the flexible air duct frame (2).

9. A crimped cooling flexible air duct according to claim 2, characterized in that: The buckle (47) is provided with a buckle bevel (71), and the first locking component (4-1) is provided with a buckle plate bevel (72) on the side near the locking component housing (41). The buckle plate bevel (72) matches the buckle bevel (71) and is used to push the buckle (47) to engage with the buckle groove (46) when the auxiliary locking component (4) is locked.

10. A crimped cooling flexible air duct according to claim 1, characterized in that: The bottom of the sealing groove (22) is provided with a sealing gasket (23).

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