Sealing element for door carrying frame of sliding plug door

Abstract

The utility model discloses a sealing element for a door carrying frame of a sliding plug door, the sealing element is cylindrical, the outer wall of the sealing element is provided with a serrated edge used for fixing a built-in sealing element, and the opening end of the sealing element is provided with a flaring used for limiting the built-in depth of the sealing element. During use, the sealing piece is arranged in the mounting end, close to the door leaf, of the door carrying frame, the sawtooth edge and the inner pipe of the door carrying frame are in interference fit to fix the sealing piece, the flaring limits the built-in depth, the sealing piece is located between the door carrying frame and the door leaf, moisture permeation is prevented, and meanwhile the working performance of the sliding plug door is not affected.

Description

Technical Field

[0001] The utility model relates to a sealing device, in particular to a sealing member for a plug door carrying frame. Background Art

[0002] The plug-type sliding door has two functions: plugging and pulling. The door leaf is mainly connected to the mechanism that guides the movement of the door leaf through the door carrying frame. When the door leaf is opened, the door leaf is driven by the door carrying frame to extend out of the vehicle body. In the prior art, the mounting surface of the door carrying frame and the door leaf is directly connected by screws. For example, the utility model patent with publication number CN 210714278 U discloses a plug-type sliding door panel driving device for buses. With this installation method, when it rains, rainwater will penetrate into the threading hole from the gap between the door carrying frame and the mounting surface of the door leaf and then flow into the inner cavity of the curved pipe. The door carrying frame is usually made of ordinary carbon steel, and the outer surface is sprayed with plastic, but the inner cavity of the curved pipe cannot be surface treated. Once water flows into the inner cavity of the curved pipe, rust will occur. When rusty water is formed, it will seep outward through the gap in the mounting surface of the door carrying frame, resulting in traces of rusty water on the inner surface of the door leaf, affecting the appearance. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to provide a sealing member for a plug door carrier frame that prevents moisture intrusion.

[0004] Technical solution: The utility model discloses a seal for a plug door carrier frame, wherein the seal is cylindrical, the outer wall of the seal is provided with a serrated edge for fixing a built-in seal, and the open end of the seal is provided with a flared opening for limiting the built-in depth of the seal.

[0005] After the serrated edge is set, the maximum diameter of the seal is larger than the inner diameter of the door frame tube. When in use, the seal is built into the installation end of the door frame close to the door leaf. The serrated edge and the inner end of the door frame are interference fit to fix the seal. The expansion makes the installation gap between the door frame and the door leaf initially sealed and prevents the seal from being excessively stuffed into the inner cavity of the door frame tube. Adding a seal inside the door frame prevents moisture from penetrating without affecting the working performance of the plug door.

[0006] Preferably, in order to further strengthen the seal and prevent the sealing performance from being reduced due to improper installation of the flared opening, the open end of the seal is sleeved on the lip inside the flared opening.

[0007] Preferably, the lip includes a trumpet-shaped first lip and a contracted second lip, and the second lip is sleeved inside the first lip. The first lip and the second lip form an "eight" shape, and when the lip abuts against the mounting surface, the end of the first lip is bent toward the outer wall of the sealing ring, and the end of the second lip is bent toward the inside of the sealing ring to form a better seal.

[0008] Preferably, in order to facilitate deformation when abutting against the door leaf and enhance sealing, the front end of the lip is tapered.

[0009] Preferably, the inner wall of the seal is inclined, and the wall thickness of the open end is greater than the wall thickness of the bottom end. When the seal is fixed to the inner tube of the door carrier, the maximum diameter of the seal is greater than the inner diameter of the door carrier tube, and its side wall is in an extruded state, and the end tends to open outward. The inclined inner wall can increase the support strength of the open end and ensure the sealing performance.

[0010] Preferably, a cavity is provided between the first lip and the flared opening to accommodate the deformed first lip. The end of the first lip abuts against the door leaf, and its front end is slightly bent or curled. If there is an installation error, the front end installation deformation is larger. The cavity is provided to accommodate the front end of the first lip to prevent the lip from affecting the flared opening and ensure the sealing.

[0011] Preferably, a through hole is provided at the sealing end of the sealing ring for the lead wire of the door frame to pass through.

[0012] Preferably, the sealing element is made of an elastic material, and the elastic material is EPDM rubber.

[0013] Beneficial effects: Compared with the prior art, the utility model has the following advantages: 1. It effectively prevents moisture from penetrating through the installation gap; 2. It is easy to install and has no effect on the movement of the plug door; 3. It prevents moisture from penetrating into the interior of the door carrier tube cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of a plug sliding door in the prior art;

[0015] Figure 2 for Figure 1 Middle AA section view;

[0016] Figure 3 This is a rear view of the seal of the utility model;

[0017] Figure 4 It is the BB section view in 3;

[0018] Figure 5 This is a cross-sectional view of the seal of the utility model in the installed state. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.

[0020] like Figure 1 As shown, it is a schematic diagram of the plug-type door structure in the prior art, and the door carrying frame is installed on one side of the top of the door leaf.

[0021] Figure 2 for Figure 1In the AA section view, the door carrier is a nearly L-shaped tube with a hollow interior. When the plug door is in use, the door leaf 3 is supported by the door carrier 2 and slides out of the vehicle body. The end of the door carrier 2 close to the door leaf 3 is the installation end, and there is no shielding structure / device on the top, which is exposed to the natural environment and is prone to water seepage on rainy days. If a shielding structure is added to the top of the installation end of the door carrier 2, it will be difficult to recycle the door leaf 3.

[0022] like Figures 3 to 5 As shown, the solution adopted by the utility model is to install a sealing member 1 in the inner cavity of the tube body of the door carrying frame 2. The sealing member 1 is made of an elastic material, and the elastic material can be EPDM rubber. The sealing member 1 is a cylindrical structure with one end open. The open end surface is formed with a flared opening 12, and the outer wall is provided with a serrated edge 11. The serrations 11 fix the sealing member in the inner cavity of the tube body of the door carrying frame 2. The flared opening 12 prevents / limits the sealing member 1 from being excessively stuffed into the inner cavity of the tube body of the door carrying frame, and on the other hand, facilitates the sealing member to contact the mounting surface of the door leaf, so that the mounting gap between the door carrying frame and the door leaf is initially sealed.

[0023] The open end of the seal 1 is provided with a lip 13 and a lip 14 which are sleeved inside the flared opening 12. The lip 13 and the lip 14 are used to prevent the sealing performance of the seal 1 from being reduced due to improper installation of the flared opening 12. The axial projection length of the lip 13 and the lip 14 is slightly greater than the axial projection length of the flared opening 12. When the flared opening 12 contacts the door leaf 3, the front ends of the lip 13 and the lip 14 abut against the mounting surface of the door leaf 3 and deform to form a close contact with the mounting surface of the door leaf. The end where the lip 13 and the lip 14 are connected to the seal 1 is the rear end, and its front end is conical, gradually narrowing, with reduced hardness and enhanced elastic deformation, which helps the lip 13 and the lip 14 abut against the mounting surface of the door leaf and produce a certain deformation, so that a seal is formed between the open end of the seal and the door leaf. The lip 13 and the flare 12 are in approximately the same direction and are trumpet-shaped, while the lip 14 and the flare are in opposite directions and are gathered. From the cross-section, the lip 13 and the lip 14 form an "eight"-shaped support. When abutting, the two lips extend in opposite directions respectively, which can improve the sealing performance of the flare 12 to a certain extent and reduce moisture infiltration.

[0024] A cavity 16 is formed between the lip 13 and the flared opening 12 . After installation, when the front end of the lip 13 is slightly deformed, the front end of the lip 13 curls backward and is located in the cavity 16 , reducing the influence of the lip 13 on the flared opening 12 .

[0025] The inner wall of the seal 1 is inclined, that is, the wall thickness of the open end is greater than that of the bottom end. The serrated edge 11 of the outer wall of the seal 1 has a certain thickness, and the maximum diameter of the outer wall of the seal is greater than the inner diameter of the tube cavity of the door frame 2. When the bottom end of the seal 1 extends into the tube cavity of the door frame 2, the side wall of the seal 1 is in a squeezed state, and its open end has a tendency to expand outward. This state helps the open end of the seal to be in close contact with the inner wall of the tube cavity of the door frame 2, preventing the expansion 12 or the lip from failing and moisture from penetrating into the tube cavity. The bottom end of the seal 1 is provided with a through hole 15 for the lead wire to pass through.

[0026] When in use, pass the lead wire through the through hole 15, align the bottom end of the seal 1 with the tube cavity of the door carrying frame 2, press to make the seal enter, then put the door carrying frame against the door leaf installation surface, and fix the door leaf and the door carrying frame.

Claims

1. A sealing member for a plug door carrying frame, characterized in that: The seal (1) is cylindrical, the outer wall of the seal (1) is provided with a serrated edge (11) for fixing the built-in seal, and the open end of the seal (1) is provided with a flared opening (12) for limiting the built-in depth of the seal.

2. The sealing member for a plug door carrier according to claim 1, characterized in that: The opening end of the sealing member (1) is provided with a lip which is sleeved inside the expanded opening.

3. The sealing member for a plug door carrier according to claim 2, characterized in that: The lip edge comprises a trumpet-shaped first lip edge (13) and a contracted second lip edge (14), wherein the second lip edge (14) is sleeved inside the first lip edge (13).

4. The sealing member for a plug door carrier according to claim 2, characterized in that: The front end of the lip is tapered.

5. The sealing member for a plug door carrier according to claim 1, characterized in that: The inner wall of the sealing member (1) is inclined, and the wall thickness at the opening end of the sealing member is greater than the wall thickness at the bottom end.

6. The sealing member for a plug door carrier according to claim 3, characterized in that: A cavity (16) for accommodating the front end of the deformed first lip is formed between the first lip (13) and the expanded opening (12).

7. The sealing member for a plug door carrier according to claim 1, characterized in that: The bottom end of the sealing member is provided with a through hole (15) for the lead wire of the door frame to pass through.

8. The sealing member for a plug door carrier according to claim 1, characterized in that: The sealing element is made of an elastic material, and the elastic material is EPDM rubber.

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