Lower swing arm of sliding plug door

Abstract

The utility model discloses a lower swing arm of a sliding-plug door, which comprises a swing arm connected with a stand column to support a door leaf to move in a sliding mode and a connecting rod connected with a vehicle body to support the door leaf to slide, the lower swing arm is hinged with the front end of the connecting rod through a connecting plate, and a roller matched with a slideway at the bottom of the door leaf is arranged on the connecting plate. The swing arm, the connecting rod and the connecting plate are approximately of a parallelogram structure, the connecting rod is driven by the swing arm to rotate, after installation, the door leaf can rotationally stretch out, plug back and slide relative to the stand column and the vehicle body, the opening degree can be increased, and the parallelogram structure enables connecting pieces between the bottom of the door leaf and the vehicle body to be increased, so that the supporting strength of the door leaf is improved; and the operation stability of the door leaf under various working conditions is ensured.

Description

Technical Field

[0001] The utility model relates to a rail vehicle accessory, in particular to a lower swing arm of a plug sliding door. Background Art

[0002] The plug-type sliding door is a door leaf that moves in the front-to-rear direction and the width direction of the vehicle body at the same time, that is, it has a plug-type sliding action. The door leaf is connected to the vehicle body by a swing arm, and the plug-type sliding action is driven by the swing arm. The opening size of the door leaf is related to the swing arm structure. In the prior art, the opening of the electric plug-type sliding door of a public bus is small. Directly increasing the opening will cause the door leaf to shake during the door opening and closing process, causing noise and shortening the service life of the door leaf. Publication number CN 115680415 A discloses a plug-type sliding door device and a rocker arm mechanism. In this scheme, the lower swing arm is a three-section hinged structure. This scheme helps to increase the opening of the door leaf, but cannot solve the shaking problem during the opening and closing process. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to provide a lower swing arm for a sliding door that increases the opening degree while ensuring the stability of the opening and closing process.

[0004] Technical solution: The utility model describes a lower swing arm for a sliding door, including a swing arm connected to a column to support the sliding movement of the door leaf, and a connecting rod connected to a vehicle body to support the sliding movement of the door leaf. The lower swing arm and the front end of the connecting rod are hinged through a connecting plate, and the connecting plate is provided with a roller that cooperates with the bottom slide of the door leaf.

[0005] The swing arm, connecting rod and connecting plate are approximately a parallelogram structure. The connecting rod is driven to rotate by the swing arm. After installation, the door leaf can not only be extended, retracted and slid relative to the column and the car body, but also the opening degree can be increased. The parallelogram structure increases the connecting parts between the bottom of the door leaf and the car body, improves the supporting strength of the door leaf, and ensures the stability of the door leaf under various working conditions.

[0006] Preferably, the connecting rod is arranged below the swing arm, and the cross section of the connecting rod is Z-shaped. The connecting rod is bent at one end close to the door leaf, and its front end and the rotating arm are located in the same plane, which is convenient for connection with the roller shaft.

[0007] Preferably, a bracket for connecting to a vehicle body is hingedly connected to the rear end of the connecting rod.

[0008] Preferably, the bracket comprises a vertical plate and a horizontal plate connected to each other, the vertical plate is provided with a first mounting hole for connecting with the vehicle body, and the horizontal plate is hinged to the rear end of the connecting rod.

[0009] Preferably, the cross-section of the cross-plate is L-shaped, the corner of the cross-plate is hinged to the connecting rod, and a second mounting hole for connecting to the column is provided on the cross-plate.

[0010] Preferably, the side branches connecting the horizontal plate and the vertical plate are provided with chamfered portions for avoiding the door leaf when the door leaf is closed.

[0011] Preferably, the bottom surface of the horizontal plate is provided with reinforcing ribs connected to the vertical plates.

[0012] Beneficial effects: Compared with the prior art, the utility model has the following advantages: 1. The connecting rod structure increases the opening degree and at the same time increases the supporting strength; 2. The structure is simple and easy to install; 3. The door leaf opening and closing sliding process is highly stable and has no shaking noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the assembly structure with the door leaf of the utility model;

[0014] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0015] Figure 3 When the door is closed Figure 1 Middle BB view;

[0016] Figure 4 When the door is open Figure 1 Middle BB view. DETAILED DESCRIPTION

[0017] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.

[0018] like Figures 1 to 3 As shown, the utility model discloses a lower swing arm of a plug sliding door, which is mainly composed of a swing arm 1, a connecting rod 2, and a connecting plate 3. The swing arm 1 is approximately C-shaped, with the end close to the door leaf as the front end, and the rear end of the swing arm 1 is connected to the column 4 of the rotating arm assembly. When the door is opened, the swing arm 1 rotates and swings with the column 4 to support and push the door leaf 5 to extend from the vehicle body. When the door is closed, the door leaf is driven to be inserted back into the vehicle body door frame. The swing arm 1 and the front end of the connecting rod 2 are hinged to the connecting plate 3, and the connecting plate 3 is used to support the sliding of the door leaf 5. A roller is installed on the connecting plate 3, and when assembled with the door leaf, the roller 3 is located in the lower slide track at the bottom of the door leaf.

[0019] The front ends of the connecting rod 2 and the swing arm 1 are both hinged through the rotating shaft of the roller and the connecting plate 3 to simplify the connection structure. The lower slide is arranged horizontally, and the rollers arranged on the connecting plate 3 need to be in the same plane. The connecting rod 2 is arranged below the swing arm 1. In order to smoothly hinge the connecting rod 2 with the rotating shaft of the roller, a bending portion is arranged at the front end of the connecting rod 2, that is, the cross section of the connecting rod 2 is Z-shaped. The connecting rod 2 is arranged below the swing arm 1 to prevent the connecting rod 2 and the swing arm 1 from blocking or interfering with each other when the door leaf is opened or closed.

[0020] The rear end of the connecting rod 2 is hinged with a bracket 6, and the bracket 6 is connected to the vehicle body. The bracket 6 is mainly composed of a vertical plate and a horizontal plate, which can be integrally formed or fixed by welding. The vertical plate is provided with a mounting hole, and when installed, it is fixed to the side wall of the vehicle body through the mounting hole; the horizontal plate is approximately L-shaped, and the front end of the side branch connected to the vertical plate is provided with a chamfered surface 61 to avoid the door leaf when the door leaf is closed. The corner of the horizontal plate is hinged to the rear end of the connecting rod 2 through a rotating shaft to support the connecting rod 2. The other side arm of the horizontal plate is provided with a mounting hole for connecting to the column rotating shaft. The bottom surface of the horizontal plate is provided with a reinforcing rib connected to the vertical plate to increase the connection strength of the horizontal plate.

[0021] like Figure 2 and Figure 3 As shown, during installation, the rear end of the swing arm 1 is connected to the bottom shaft of the column, the rear end of the connecting rod 2 is connected to the vehicle body through the bracket 6, and the roller of the connecting plate 3 is in the lower slide of the door leaf. When the column rotates, the swing arm 1, the connecting plate 3, and the roller are driven to rotate, and then the door leaf is driven to rotate. Since the two rollers are connected by the connecting plate and are in the lower slide, the connecting rod 2 is driven to rotate when the door leaf rotates. When it rotates to the appropriate position, the connecting rod 2 and the swing arm 1 jointly support the sliding of the door leaf; when the door leaf is closed, the principle is the same and will not be repeated.

Claims

1. A lower swing arm of a plug door, comprising a swing arm (1) for connecting with a column to support the plug movement of a door leaf, characterized in that: It also comprises a connecting rod (2) for connecting with the vehicle body to support the sliding movement of the door leaf, the swing arm (1) and the front end of the connecting rod (2) are hinged via a connecting plate (3), and the connecting plate (3) is provided with a roller that cooperates with a slideway at the bottom of the door leaf.

2. The lower swing arm of the plug door according to claim 1, characterized in that: The connecting rod (2) is arranged below the swing arm, and the cross section of the connecting rod (2) is Z-shaped.

3. The lower swing arm of the plug door according to claim 1, characterized in that: The rear end of the connecting rod (2) is hingedly connected with a bracket (6) for connecting to a vehicle body.

4. The lower swing arm of the plug door according to claim 3, characterized in that: The bracket (6) comprises a vertical plate and a horizontal plate connected to each other, the vertical plate is provided with a first mounting hole for connecting to a vehicle body, and the horizontal plate is hinged to the rear end of the connecting rod (2).

5. The lower swing arm of the plug door according to claim 4, characterized in that: The horizontal plate is L-shaped, the corner of the horizontal plate is hinged to the connecting rod (2), and a second mounting hole for connecting to the column is provided on the horizontal plate.

6. The lower swing arm of the plug door according to claim 4, characterized in that: The side branches connecting the horizontal plate and the vertical plate are provided with chamfered portions (61) for avoiding the door leaf when the door leaf is closed.

7. The lower swing arm of the plug door according to claim 4, characterized in that: The bottom surface of the horizontal plate is provided with reinforcing ribs connected with the vertical plates.

Images