Novel window frame inside and outside flush structure
By using a flush structure with a raised window frame and laser welding of the inner and outer skins, the problem of gaps in the assembly of window and door frames and skins for urban rail and intercity rail vehicles has been solved, improving the strength and sealing of the door panels, simplifying operation and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-04-03
AI Technical Summary
During the assembly of existing urban rail and intercity scissor windows and doors, there is a height difference between the window frame and the skin, which requires filling with repair agent, making the operation complicated and inconvenient.
The window frame with protrusions is connected to the inner and outer skins by laser welding. The inner and outer skins are designed with an L-shaped curved structure. The inner and outer sides of the window frame are flush, eliminating the need for filler and repair agent, and using laser welding for permanent connection.
It improves the strength and sealing of urban rail and intercity sliding door panels, simplifies the assembly process, enhances ease of use and door panel reliability, and reduces painting and production costs.
Smart Images

Figure CN224078958U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a door system for rail transit vehicles, and more particularly to a novel window frame with flush inner and outer sides. Background Technology
[0002] In the existing door panel structure of urban rail and intercity sliding doors, the window frame needs to be constantly adjusted during assembly to ensure it meets design requirements. During frame assembly, the gaps reserved on the inner and outer skins are larger than the window frame, creating a certain distance. The height difference between the window frame and the skin necessitates the use of putty and other repair agents, making the process complex and inconvenient.
[0003] Therefore, it is necessary to develop new window frame structures to improve ease of use. Utility Model Content
[0004] Purpose of the utility model: In view of the shortcomings and defects of the existing technology, this utility model provides a new type of window frame with flush inner and outer structures. The flush structure of the window frame improves the strength and sealing performance of the door panel of urban rail and intercity sliding doors, solves the problem of filling the gaps generated during the assembly process of the window frame and the skin with repair agent, and improves the convenience of use.
[0005] Technical solution: The present invention provides a novel window frame with flush inner and outer edges, characterized in that: it includes a window frame with protrusions, the window frame with protrusions being connected to an inner skin and an outer skin respectively by laser welding; the inner skin is an L-shaped curved structure with a flange that fits the lower part of the window frame with protrusions, and the outer skin is an L-shaped curved structure with a flange that fits the upper part of the window frame with protrusions.
[0006] The raised window frame is located on the door panel of the urban rail and intercity sliding door.
[0007] The urban rail and intercity sliding door panel includes a window frame with protrusions, an inner skin, an outer skin, and a door panel frame.
[0008] The window frame with protrusions is fixedly connected to the door panel frame.
[0009] The upper perimeter adhesive strip of the door panel frame covers the top of the door panel frame.
[0010] The window frame with protrusions has a flush structure inside and out.
[0011] Beneficial effects: Compared with the prior art, this utility model has the following significant advantages: The inner and outer frames of this utility model are flush, which improves the strength and sealing of the door panels of urban rail and intercity sliding doors, solves the problem of filling the gaps between the window frame and the skin during assembly, and improves the convenience of use. At the same time, the permanent laser welding connection of this structure is superior to the pure adhesive structure, effectively improving the reliability of the door panel. Attached Figure Description
[0012] Figure 1 A structural diagram illustrating the assembly of a window frame using a repair agent in the prior art.
[0013] Figure 2 This is a schematic diagram of the structure of this utility model;
[0014] Figure 3 This is a schematic diagram of the structure of the upper peripheral rubber strip in the prior art;
[0015] Figure 4 This is a schematic diagram of the upper peripheral adhesive strip of this utility model;
[0016] Figure 5 This is a schematic diagram of the structure of the inner skin in the prior art;
[0017] Figure 6 This is a schematic diagram of the structure of the inner skin of this utility model;
[0018] Figure 7 This is a schematic diagram of the structure of the outer skin in the prior art;
[0019] Figure 8 This is a schematic diagram of the structure of the outer skin of this utility model;
[0020] In the diagram, 1 represents a window frame with protrusions; 2 represents the inner skin; 3 represents the outer skin; 4 represents the repair agent; and 5 represents the laser-welded edge seal. Detailed Implementation
[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0022] This utility model discloses a novel window frame with flush inner and outer edges, comprising a window frame 1 with protrusions. The window frame 1 with protrusions is connected to an inner skin 2 and an outer skin 3 via laser-welded edge sealing 5. The inner skin 2 is an L-shaped curved structure with a flange that fits the lower part of the window frame 1 with protrusions, and the outer skin 3 is an L-shaped curved structure with a flange that fits the upper part of the window frame 1 with protrusions. The window frame 1 with protrusions is located on the door panel of a rail or intercity sliding door. The rail or intercity sliding door panel includes the window frame 1 with protrusions, the inner skin 2, the outer skin 3, and the door panel frame. The window frame 1 with protrusions is fixedly connected to the door panel frame. A rubber strip covers the top of the door panel frame. The window frame 1 with protrusions has a flush inner and outer edge structure.
[0023] like Figure 1 In existing technology, window frames use repair agent 4 to connect the raised window frame 1 with the inner skin 2 and the outer skin 3; such as Figure 2 In this invention, the window frame 1 with protrusions is connected to the inner skin 2 and the outer skin 3 respectively by laser welding edge sealing 5. The window frame of this invention has a protruding structure, which facilitates its fit with the inner skin 2 and the outer skin 3.
[0024] like Figure 3 In existing technology, the upper perimeter adhesive strip covers part of the top of the door panel frame; such as Figure 4 The upper perimeter adhesive strip of this utility model covers the top of the door panel frame.
[0025] like Figure 5 The inner skin 2 in the existing technology has a long strip structure; such as Figure 6 The inner skin 2 of this utility model is a curved structure that fits the lower part of the window frame 1 with protrusions.
[0026] like Figure 7 In the prior art, the outer skin 3 is a long strip structure; such as Figure 8 The outer skin 3 of this utility model is a curved structure that fits the upper part of the window frame 1 with protrusions.
[0027] The inner and outer skins serve functions such as appearance. In this utility model, by adding window frame flanges and optimizing the window frame cross-section to the inner and outer skins, the filling and repair agent during the door panel bonding process is eliminated. During window frame assembly, there is no need to consider whether there will be interference with the skin. The gap between the window frame and the skin is eliminated. The window frame and the skin are fixed by laser welding. Compared with the old structure, there is basically no difference in appearance, while improving the reliability of the door panel, increasing production efficiency, and reducing paint and production costs.
[0028] This utility model features a flush inner and outer frame structure, which improves the strength and sealing of the door panels for urban rail and intercity sliding doors. It also eliminates the need for filling gaps in the window frame and skin during assembly, thus enhancing usability. Furthermore, the laser-welded permanent connection of this structure is superior to purely adhesive structures, effectively improving the door panel's reliability.
Claims
1. A novel window frame with flush inner and outer edges, characterized in that: It includes a window frame (1) with protrusions, which is connected to the inner skin (2) and the outer skin (3) respectively by laser welding edge sealing (5); the inner skin (2) is an L-shaped curved structure with a flange that fits the lower part of the window frame (1) with protrusions, and the outer skin (3) is an L-shaped curved structure with a flange that fits the upper part of the window frame (1) with protrusions.
2. The novel window frame with flush inner and outer sides according to claim 1, characterized in that: The raised window frame (1) is located on the door panel of the urban rail and intercity sliding door.
3. The novel window frame with flush inner and outer surfaces according to claim 2, characterized in that: The aforementioned urban rail and intercity sliding door panel includes a window frame (1) with protrusions, an inner skin (2), an outer skin (3), and a door panel frame.
4. The novel window frame with flush inner and outer sides according to claim 3, characterized in that: The window frame (1) with protrusions is fixedly connected to the door panel frame.
5. The novel window frame flush structure according to claim 4, characterized in that: The upper perimeter adhesive strip of the door panel frame covers the top of the door panel frame.
6. The novel window frame with flush inner and outer sides according to claim 1, characterized in that: The window frame (1) with protrusions has a flush structure inside and out.