Liftable sealing device for built-in sliding door and door system

Abstract

The utility model discloses a lifting sealing device for a built-in sliding door and a door system. A collision block of the lifting sealing device is fixedly connected with a sliding rod, the sliding rod is connected with a connecting rod through a first cylindrical pin, the connecting rod is installed on a support through a second cylindrical pin, a pressure spring is arranged between the tail of the connecting rod and the support, and a rubber strip is installed at the bottom of the support. When the door closing collision block is extruded, the collision block moves, the sliding rod moves along with the collision block, the sliding rod drives the connecting rod to rotate around the first cylindrical pin, the tail of the connecting rod rotates downwards around the second cylindrical pin, downward pressure is applied to the compression spring and the support, and sealing between the rubber strip and the door leaf is achieved. Through the cooperation of the collision block, the sliding rod, the connecting rod and the compression spring, the rubber strip is pressed towards the door leaf direction after the built-in sliding door is closed, the air tightness of the built-in sliding door is improved, after the built-in sliding door is opened, the rubber strip rebounds and resets to leave a sealing face under the action of the compression spring, and the sealing effect is improved. The problem that in the door opening process, the scraping resistance between the rubber strip and the sealing face is large or the door cannot be opened is solved.

Description

Technical Field

[0001] The utility model relates to an urban rail transit vehicle device, in particular to a liftable sealing device and a door system for a built-in sliding door. Background Art

[0002] Built-in sliding doors rely primarily on front and rear rubber strips and sealing brushes to achieve sealing. However, to reduce the resistance of the door leaf during opening and closing, a brush seal is used on the upper part. However, the brush seal is poor, which can easily allow external impurities and airflow to enter the vehicle, resulting in poor sealing on the upper part. Similarly, to accommodate the smooth movement of the sliding door, the lower part of the design usually leaves a gap, which also causes a lack of sealing on the lower part, resulting in insufficient sealing on the lower part. The sealing structure of existing built-in sliding doors has obvious defects in both the upper and lower parts, resulting in limited improvement in the airtightness of the door system. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to provide a sealing device for a built-in sliding door that forms a rubber strip compression seal when closing; another purpose of the utility model is to provide a door system including the above-mentioned liftable sealing device.

[0004] Technical solution: The liftable sealing device for built-in sliding doors described in the utility model is symmetrically installed on the left and right door leaves, and the liftable sealing device includes an installation baffle, a collision block, a sliding rod, a connecting rod, a compression spring and a bracket. The collision block is fixedly connected to the sliding rod, and the sliding rod is connected to the connecting rod through a first cylindrical pin. The connecting rod is installed on the bracket through a second cylindrical pin. A compression spring is provided between the tail of the connecting rod and the bracket, and the rubber strip is installed at the bottom of the bracket; when the door closing collision block is subjected to extrusion pressure, the collision block moves in the opposite direction of the extrusion force, and the sliding rod moves with the collision block. The sliding rod drives the connecting rod to rotate around the first cylindrical pin, and the tail of the connecting rod rotates downward around the second cylindrical pin. The tail of the connecting rod applies downward pressure to the compression spring and the bracket, and the rubber strip moves downward with the bracket to achieve sealing between the rubber strip and the door leaf.

[0005] Furthermore, an anti-rotation block and an adjuster are provided between the collision block and the slide rod.

[0006] Furthermore, the mounting baffle is provided with a square groove, and when the door closing collision block is subjected to an extrusion force, the collision block moves along the square groove in a direction opposite to the extrusion force.

[0007] Furthermore, the mounting baffle is provided with a limit block to limit the maximum movement position of the slide rod.

[0008] Furthermore, the connecting rod includes a U-shaped main body and an extension portion, and the extension portion is fixedly connected to one end of the compression spring.

[0009] Furthermore, the strip is an eight-shaped sealing strip.

[0010] The door system of the utility model comprises a left door leaf and a right door leaf, and the top and bottom of the door leaf are equipped with the above-mentioned liftable sealing device.

[0011] Beneficial effects: Compared with the prior art, the utility model has the following advantages: 1. The utility model realizes that the rubber strip is pressed toward the door leaf after the built-in sliding door is closed through the cooperation of the collision block, the sliding rod, the connecting rod and the compression spring, thereby realizing compression sealing of the pressure strip, effectively improving the airtightness of the built-in sliding door, and solving the problem of poor airtightness of the built-in sliding door; 2. At the same time, after the built-in sliding door is opened, the compression spring acts to make the rubber strip rebound and reset away from the sealing surface, avoiding the problem of large resistance of the rubber strip and the sealing surface scraping during the door opening process or the inability to open the door; 3. The utility model has a simple structure, is easy to install and replace, and can be applied to the sealing improvement and transformation of existing built-in sliding door projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of a liftable sealing device;

[0013] Figure 2 is a side view of a liftable sealing device;

[0014] Figure 3 Schematic diagram of the movement of the liftable sealing device during the door closing process;

[0015] Figure 4 This is a schematic diagram of the installation of the liftable sealing device;

[0016] Figure 5 Schematic diagram of the movement of the rubber strip during the door opening and closing process;

[0017] Figure 6 This is a schematic diagram of the installation of the liftable sealing device. DETAILED DESCRIPTION

[0018] The technical solution of the present utility model will be further described below with reference to the accompanying drawings.

[0019] The utility model discloses a liftable sealing device for a built-in sliding door. The liftable sealing device includes a mounting baffle 1, a bumper 18, slide bars 7 and 15, a connecting rod 10, a compression spring 12, and a bracket 8. The bumper 18 is fixedly connected to the slide bars 7 and 15. The slide bars 7 and 15 are connected to the connecting rod 10 via a first cylindrical pin 14. The connecting rod 10 is mounted on the bracket 8 via a second cylindrical pin 13 and a limit screw 9. A compression spring 12 is provided between the tail of the connecting rod 10 and the bracket 8, and a rubber strip 11 is mounted on the bottom of the bracket 8. An anti-rotation block 17 and an adjuster 16 are also provided between the bumper 18 and the slide bars 7 and 15. Plugs 2, 5, and 20 are provided on the mounting baffle 1 and at both ends of the bracket 8, respectively.

[0020] The mounting baffle 1 is provided with a limit block 4 to limit the maximum travel of the slide rod 10. The connecting rod comprises a U-shaped main body and an extension portion, which is fixedly connected to one end of a compression spring 12. Preferably, the rubber strip 11 is an "eight"-shaped sealing strip. The limit block 4 and the rubber strip 11 are secured to the mounting baffle 1 and bracket 8 respectively via fastening screws 3 and 6.

[0021] The door system of the present invention comprises a left door leaf and a right door leaf, and the liftable sealing device is installed on the top and bottom of the door leaf to form a left liftable sealing device 21 and a right liftable sealing device 22.

[0022] When the door closing block 18 is subjected to the extrusion pressure, the block 18 moves in the opposite direction of the extrusion pressure, and the slide bars 7 and 15 move with the block 18. The slide bars 7 and 15 drive the connecting rod 10 to rotate around the first cylindrical pin 14. The tail of the connecting rod 10 rotates downward around the second cylindrical pin 13. The tail of the connecting rod 10 applies downward pressure to the compression spring 12 and the bracket 8, and the rubber strip 11 moves downward with the bracket 8 to achieve sealing between the rubber strip 11 and the door leaf.

[0023] When the door is opened, after the extrusion force F of the end collision block 18 is unloaded, the elevating sealing device moves upward along the second cylindrical pin 13 with the bracket 8 under the restoring force of the compression spring 12, and the connecting rods 10 on the left and right sides of the synchronization device are reset to the initial state under the restoring force of the compression spring 12, and the slide rods 7 and 15 return to their positions.

Claims

1. A lifting and sealing device for a built-in sliding door, symmetrically mounted on the left and right door leaves, characterized in that: The liftable sealing device includes an installation baffle, a collision block, a sliding rod, a connecting rod, a compression spring and a bracket. The collision block is fixedly connected to the sliding rod, the sliding rod and the connecting rod are connected by a first cylindrical pin, the connecting rod is installed on the bracket by a second cylindrical pin, a compression spring is provided between the tail end of the connecting rod and the bracket, and the rubber strip is installed at the bottom of the bracket; when the door closing collision block is subjected to extrusion force, the collision block moves in the opposite direction of the extrusion force, the sliding rod moves with the collision block, the sliding rod drives the connecting rod to rotate around the first cylindrical pin, and the tail end of the connecting rod rotates downward around the second cylindrical pin. The tail end of the connecting rod applies downward pressure to the compression spring and the bracket, and the rubber strip moves downward with the bracket to achieve sealing between the rubber strip and the door leaf.

2. The liftable sealing device for a built-in sliding door according to claim 1, characterized in that: An anti-rotation block and an adjuster are also provided between the collision block and the slide rod.

3. The liftable sealing device for a built-in sliding door according to claim 1, characterized in that: The mounting baffle is provided with a square groove.

4. The liftable sealing device for a built-in sliding door according to claim 3, characterized in that: The mounting baffle is provided with a limiting block.

5. The liftable sealing device for a built-in sliding door according to claim 1, characterized in that: The connecting rod comprises a U-shaped main body and an extension portion, and the extension portion is fixedly connected to one end of the compression spring.

6. The liftable sealing device for a built-in sliding door according to claim 1, characterized in that: The adhesive strip is an eight-shaped sealing adhesive strip.

7. A door system comprising a left door leaf and a right door leaf, characterized in that: The top and bottom of the door leaf are installed with the liftable sealing device according to any one of claims 1 to 6.

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