A multi-stage sealing structure for subway vehicle door

Abstract

The present invention provides a multi-stage sealing structure for a subway vehicle door, comprising a vehicle body interface, a sealing fastener, a door panel interface and a sealing strip. The sealing strip and the sealing fastener form a three-stage seal between the vehicle body interface and the door panel interface, thereby greatly improving the sealing and sound insulation performance of the door, solving the problem of rain leakage at the door, and enhancing the maintainability, sealing and sound insulation performance of the rail vehicle.

Description

Technical Field

[0001] The invention belongs to the technical field of rail vehicle manufacturing, and in particular relates to a multi-stage sealing structure for a subway vehicle door. Background Art

[0002] In existing subway vehicle technology, the door seals are typically welded or bonded together, consisting of door panels, sealant, door sealing frames, and single-stage door sealing strips. For example, subway vehicles commonly used in Beijing, Shenzhen, and Shanghai suffer from various issues, including aging of exposed sealant, heavy weight, short sealing lifespan, and operational leaks. These issues hinder vehicle use and increase repair and maintenance costs. Therefore, developing a completely new structure capable of replacing this series of components currently used in vehicles—a sealing fastener structure with improved sealing and sound insulation, high integration, ease of maintenance, and a longer lifespan—is a key requirement for improving the maintainability, functionality, and usability of rail vehicles. Summary of the Invention

[0003] The present invention aims to solve the problems of aging and leakage of exposed sealant, heavy weight, short repair and maintenance cycle, poor door sealing and sound insulation performance, and operational leakage, thereby providing a multi-level sealing structure for subway vehicle doors, improving the maintainability, sealing and sound insulation performance of rail vehicles, and reducing the repair and maintenance costs of the door assembly structure.

[0004] In order to achieve the above-mentioned purpose of the invention, the present invention provides a multi-stage sealing structure for the door of a subway vehicle, including a vehicle body interface, a sealing fastener, a door panel interface and a sealing strip, wherein the vehicle body interface is a square tubular profile, and the cross section of the sealing fastener profile is a right-angled trapezoid at the sealing position, the lower bottom of the right-angled trapezoid is fixedly connected to the vehicle body interface, the right-angled side of the right-angled trapezoid faces outside the vehicle, the lower part of the right-angled side is a first-level sealing position, the plate-shaped upper bottom of the right-angled trapezoid extending toward the outside of the vehicle forms a second-level sealing position, and the outer side of the right-angled trapezoid upper bottom is a third-level sealing position; the door panel interface is at the edge of the door panel, and a profile opening is set at the edge of the door panel, and the upper and lower parts of the profile opening are two opposite installation parts. Groove; the sealing strip is provided with an upper protrusion and a lower protrusion on the outer side, the upper protrusion and the lower protrusion are clamped in the mounting groove of the door panel, the upper inner side of the sealing strip is the upper sealing position with the toothed sealing surface facing downward, the middle raised ring is the middle sealing position, and the lower rectangular strip is the lower sealing position; when the door is closed, the door panel moves toward the vehicle body, the first-level sealing position contacts the lower sealing position, and the strip is compressed to form a first-level sealing structure; the second-level sealing position squeezes the upper part of the ring of the middle sealing position, the strip is compressed, the ring is concave, and it is close to the rear side of the strip surface to form a second-level sealing structure; the deformation of the intermediate sealing position pulls the upper sealing position to stick to the third-level sealing position to form a third-level sealing structure.

[0005] Furthermore, a concave water diversion groove and a pressure relief hole are provided in the middle of the right-angled side of the right-angled trapezoid. The water diversion groove is a groove surrounding the door in the middle of the right-angled side. A plurality of through holes penetrating the right-angled side of the right-angled trapezoid cavity are provided at the bottom of the water diversion groove as pressure relief holes. A drainage guide groove is provided on the lower side of the pressure relief hole to guide the water out of the water diversion groove.

[0006] Furthermore, the square tubular profile of the vehicle body interface 1 is provided with a slide groove, and the lower bottom of the right-angled trapezoid is provided with a mounting hole. A mounting bolt is provided in the slide groove and passes through the mounting hole, and the sealing fastener 2 is fixed to the vehicle body with a nut.

[0007] Furthermore, the bottom of the sealing fastener profile extends toward the outside of the vehicle and forms an L-shaped corner, which fits onto the outside of the square tubular profile of the vehicle body connection 1. Two mounting grooves are provided at the L-shaped corner, and vehicle body sealing rubber rings are provided in the mounting grooves.

[0008] Furthermore, it also includes a water stop, wherein a water stop parallel to the right-angle side is provided on the outside of the right-angle trapezoidal cavity, and a lower drainage hole is provided at the lower part of the water stop.

[0009] Furthermore, a process operation hole for installing bolts is provided on the inner side of the right-angled trapezoid.

[0010] The present invention develops a new multi-stage sealing structure to solve the problem of aging and leakage of exposed sealant, eliminate the welding or bonding door gussets, increase the repair and maintenance cycle, greatly improve the sealing and sound insulation performance of the door, solve the problem of rain leakage at the door, improve the maintainability, sealing and sound insulation performance of rail vehicles, reduce the repair and maintenance cost of the door combination structure, and improve the key needs of subway vehicle maintainability, functionality and usability. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the subway vehicle structure;

[0012] Figure 2 This is a schematic diagram of the position of the multi-stage sealing structure of the present invention;

[0013] Figure 3 This is a schematic cross-sectional view of the multi-stage sealing structure of the present invention;

[0014] Figure 4 This is a schematic diagram of the door panel interface and sealing strip installation of the present invention;

[0015] Figure 5 This is a schematic diagram of the door panel interface of the present invention;

[0016] Figure 6 This is a schematic diagram of the sealing strip of the present invention;

[0017] Figure 7 This is a schematic diagram of the sealing fastener of the present invention;

[0018] Figure 8 This is an exploded view of the sealing fastener of the present invention;

[0019] Figure 9 This is a schematic diagram of the vehicle body interface of the present invention;

[0020] Figure 10 This is an exploded view of the vehicle body interface of the present invention;

[0021] Figure 11 This is a schematic diagram of the sealing fastener body structure of the present invention;

[0022] Figure 12 This is a schematic diagram of the sealing strip structure of the present invention;

[0023] Among them: 1. Car body interface; 2. Sealing fasteners; 3. Door panel interface; 4. Sealing strips;

[0024] 11. Tubular profile; 12. Slideway; 13. Mounting bolts;

[0025] 21. Sealing fastener body; 22. Sealing rubber ring; 211. Secondary sealing position; 212. Water stop; 213. Mounting groove; 214. Third-level sealing position; 215. Mounting hole; 216. Process operation hole; 217. Water diversion groove and pressure relief hole; 218. First-level sealing position; 219. Lower drainage hole; 220. Drainage guide groove;

[0026] 41. Upper protrusion; 42. Upper sealing position; 43. Middle sealing position; 44. Lower sealing position; 45. Lower protrusion. DETAILED DESCRIPTION

[0027] Reference Figure 1 and Figure 2 The application and installation position of the multi-stage sealing structure of the subway vehicle door of the present invention is at the position where the door panel and the vehicle body are connected, and a sealing fastener 2 that cooperates with the door panel and the vehicle body is provided between the door panel and the vehicle body.

[0028] Reference Figure 3The multi-stage sealing structure of the subway vehicle door includes a vehicle body interface 1, a sealing fastener 2, a door panel interface 3 and a sealing strip 4. The vehicle body interface 1 is a square tubular profile 11 welded at the vehicle body door position, with a slide 12 on the upper side. The sealing fastener 2 includes a sealing fastener body 21 and a sealing rubber ring 22. The sealing fastener body 21 is a profile. The sealing position on the right side of the sealing fastener 2 is a right-angled trapezoidal cavity. The mounting bolt 13 extends from the slide 12 through the mounting hole 215 at the bottom of the right-angled trapezoidal cavity and is fixed on the inside with a nut. The right-angled side of the right-angled trapezoid faces the outside of the vehicle. The inside of the right-angled trapezoidal cavity is provided with a process operation hole 216 for mounting the bolt 13. A water stop 212 parallel to the right-angled side is provided on the outside of the right-angled trapezoidal cavity to block water and reduce the water pressure outside the vehicle. A lower drainage hole 219 is provided at the lower part of the water stop 212 to connect to the drainage pipe at the pedal. A concave water channel and pressure relief hole 217 are located in the middle of the right-angled side of the trapezoidal cavity. The water channel is a groove running along the perimeter of the door in the middle of the right-angled side. The bottom of the water channel is provided with multiple through-holes penetrating the right-angled side of the trapezoidal cavity, serving as pressure relief holes. Drain guide grooves 220 are located below the pressure relief holes to guide water from the water channel. Water is then directed to the lower pedal through lower drainage holes 219 and discharged through the drainage holes. The lower portion of the right-angled side of the trapezoidal cavity forms a primary seal 218. A plate extending outward from the upper bottom of the trapezoidal cavity forms a secondary seal 211. The outer side of the upper bottom surface of the trapezoidal cavity forms a tertiary seal 214.

[0029] The lower base of the sealing fastener 2 extends outward from the vehicle, forming an L-shaped corner that fits against the outside of the square tubular profile 11 of the vehicle body interface 1. Two mounting grooves 213 are located at these L-shaped corners of the sealing fastener 2. Body sealing rubber rings 22 are installed in these grooves, creating a two-stage seal between the sealing fastener 2 and the vehicle body interface 1. This eliminates the exposed glue seam on the existing door strike plate and resolves a series of issues caused by sealant aging. Mounting bolts 13 are located in the upper runners 12 of the vehicle body interface 1 and secure the sealing fastener 2 to the vehicle body with nuts.

[0030] The door panel interface 3 is at the edge of the door panel, and a profile opening is set at the edge of the door panel. The upper and lower parts of the profile opening are two opposite installation grooves. The upper protrusion 41 and the lower protrusion 45 of the sealing strip 4 are clamped in the installation groove to fix the sealing strip 4. The fixing is firm and does not require the use of sealants or bolts to connect, which can achieve quick repair and maintenance. The upper left part of the sealing strip 4 is the upper sealing position 42 with the toothed sealing surface facing downward, the raised ring in the middle is the middle sealing position 43, and the lower rectangular strip is the lower sealing position 44. When the door is closed, the door panel moves toward the vehicle body, the first-level sealing position 218 contacts the lower sealing position 44, and the strip is compressed to form a first-level sealing structure. The second-level sealing position 211 squeezes the upper part of the ring of the middle sealing position 43, the strip is compressed, the ring is concave, and it is close to the rear side strip surface to achieve the sealing function and form a second-level sealing structure. The deformation of the intermediate sealing position pulls the upper sealing position 42 to stick to the third-level sealing position 214 to form a third-level sealing structure. A pressure-retaining chamber is formed between the secondary and tertiary sealing structures, further enhancing sealing and sound insulation. A water channel and pressure relief hole 217 utilize the positive pressure of the vehicle's interior air to guide any water that may seep between the primary and secondary sealing structures through lower drain holes 219 to the lower pedal, where it is then discharged. The secondary seal provides both sealing and sound insulation within the vehicle.

Claims

1. A multi-stage sealing structure for a subway vehicle door, characterized by: The invention comprises a vehicle body interface (1), a sealing fastener (2), a door panel interface (3) and a sealing strip (4), wherein the vehicle body interface (1) is a square tubular profile (11), the sealing fastener (2) has a profile cross section at a sealing position of a right-angled trapezoid, the lower bottom of the right-angled trapezoid is fixedly connected to the vehicle body interface (1), the right-angled side of the right-angled trapezoid faces the outside of the vehicle, the lower part of the right-angled side is a first-level sealing position (218), the upper bottom of the right-angled trapezoid extends toward the outside of the vehicle to form a second-level sealing position (211), and the outer side of the upper bottom of the right-angled trapezoid is a third-level sealing position (214); the door panel interface (3) is at the edge of the door panel, and a profile opening is provided at the edge of the door panel, and the upper and lower parts of the profile opening are two opposite mounting grooves; the sealing strip (4) is provided with an upper protrusion (41) and The lower protrusion (45), the upper protrusion (41) and the lower protrusion (45) are clamped in the installation groove of the door panel, the upper inner side of the sealing strip (4) is the upper sealing position (42) with the toothed sealing surface facing downward, the middle raised ring is the middle sealing position (43), and the lower rectangular strip is the lower sealing position (44); when the door is closed, the door panel moves toward the vehicle body, the first-level sealing position (218) contacts the lower sealing position (44), the strip is compressed, and a first-level sealing structure is formed; the second-level sealing position (211) squeezes the upper part of the ring of the middle sealing position (43), the strip is compressed, the ring is concave, and it is close to the rear side strip surface, forming a second-level sealing structure; the deformation of the middle sealing position pulls the upper sealing position (42) to stick to the third-level sealing position (214), forming a third-level sealing structure.

2. The multi-stage sealing structure for a subway vehicle door according to claim 1, characterized in that: The middle portion of the right-angled trapezoidal right-angled side is provided with an inwardly concave water diversion groove and a pressure relief hole (217). The water diversion groove is a groove surrounding the door in the middle portion of the right-angled side. The bottom portion of the water diversion groove is provided with a plurality of through holes penetrating the right-angled side of the right-angled trapezoidal cavity as pressure relief holes. A drainage guide groove (220) is provided below the pressure relief hole to guide water out of the water diversion groove.

3. The multi-stage sealing structure for a subway vehicle door according to claim 1, characterized in that: The square tubular profile (11) of the vehicle body interface (1) is provided with a slide groove (12), the right-angled trapezoidal bottom is provided with a mounting hole (215), a mounting bolt (13) is provided in the slide groove (12) and passes through the mounting hole (215), and a nut is used to fix the sealing fastener (2) on the vehicle body.

4. The multi-stage sealing structure for a subway vehicle door according to claim 1, characterized in that: The bottom of the sealing fastener (2) profile extends toward the outside of the vehicle and forms an L-shaped corner, which fits onto the outside of the square tubular profile (11) of the vehicle body interface. Two mounting grooves (213) are provided at the L-shaped corner, and a vehicle body sealing rubber ring (22) is provided in the mounting grooves (213).

5. The multi-stage sealing structure for a subway vehicle door according to claim 2, characterized in that: It also includes a water stopper (212), wherein a water stopper (212) parallel to the right-angle side is provided on the outside of the right-angle trapezoidal cavity, and a lower drainage hole (219) is provided at the lower portion of the water stopper (212).

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