Plug door assembly

Abstract

The invention relates to the field of plug sliding door, and discloses a plug sliding door assembly, wherein a set of coupling drive mechanisms are respectively installed at both ends of a base fixed on the upper part of a door frame, the two sets of coupling drive mechanisms are fixedly connected by a sliding rod and rotatably connected by a pull rod, two sliding sleeves are sleeved on the sliding rod, and the two ends of the wire drawing are connected to the two sliding sleeves after passing through two wire drawing wheels respectively; a guide wheel rotatably connected to one of the sliding sleeves is limited in a guide groove on the base; a power source of the plug sliding door is fixed on the pull rod, and its driving end is fixedly connected to the sliding sleeve connected to the guide wheel; the two sliding sleeves are respectively fixedly connected to door panels through door carrying frames, and the coupling drive mechanism reciprocates relative to the base under the drive of the power source. The device is arranged to disperse the force originally concentrated on the guide wheel to the guide wheel and the coupling drive mechanisms on both sides thereof, so that the plug sliding door is very stable when opening or closing, avoiding the phenomenon that the guide wheel automatically disengages from the guide groove, and reducing the damage of the guide wheel.

Description

Technical Field

[0001] The invention relates to the field of driving mechanisms, and in particular to a plug-and-slide door assembly. Background Art

[0002] At present, Sierra doors are usually used for bus doors, subway doors or high-speed rail doors. Sierra doors have good sealing properties and take up little space, making the overall vehicle model beautiful and elegant. The quality of Sierra door locks directly affects the safety and sealing properties of Sierra doors. In order to improve the safety of Sierra doors, researchers in the field mainly focus on the structure of Sierra door locks.

[0003] The Sierra door lock structure currently used usually guides a guide wheel on the door lock into a guide groove on the frame when the door is closed, and limits the movement of the door lock through the guide groove. The door lock is fixed on the door, which limits the movement of the door and achieves the purpose of locking the door. On the one hand, this door lock structure has great safety hazards, because when the vehicle is driving, the road surface is bumpy and the guide wheel on the door lock will roll back and forth in the guide groove, which will cause the door to be poorly closed. When running at high speed, airflow will enter the car through the door gap, affecting the passenger experience; when the vibration is large, the guide wheel may even slide back from the guide groove, causing the door to open automatically, which poses a great safety hazard. On the other hand, in this door lock structure, the power source is fixed on the door frame, and the driving end of the power source is fixed on the guide wheel. When the door is closed or opened, the force applied by the power source is all applied to the guide wheel. The guide wheel is the only stress point, which is prone to damage and acceleration due to stress concentration. And because there is only this stress point, when closing or opening the door, the door panels on both sides cannot be guaranteed to be absolutely synchronized. This will result in the inability to guarantee absolute balance when the doors on both sides are closed or opened, which can easily cause the door panels to shake.

[0004] In order to solve the above-mentioned safety hazard problem, the common solution is to add a cylinder or a motor to pull the guide wheel after the car door is closed, so that the guide wheel is confined in the guide groove. However, this method requires a large pulling force to limit the guide wheel after the car door is closed. The problem of unstable closing or opening of the door has not been well solved, which does not conform to the concept of green environmental protection in today's society. Summary of the invention

[0005] Purpose of the invention: In view of the problems existing in the prior art, the present invention provides a plug sliding door assembly. In the plug sliding door assembly, by providing a coupling drive mechanism and changing the fixed position of the plug sliding door power source, the force originally concentrated on the guide wheel can be dispersed to the guide wheel and the coupling drive mechanism on both sides thereof, so that when the plug sliding door is opened or closed, the door panels on both sides can ensure absolute synchronous opening or closing, which is very stable and reliable, and effectively avoids the phenomenon of the guide wheel automatically disengaging from the guide groove, and can greatly reduce the damage to the guide wheel, save power, and be environmentally friendly.

[0006] Technical solution: The present invention provides a Sierra door assembly, comprising a base fixed on the upper part of the door frame, with a group of coupling drive mechanisms installed at both ends of the base, respectively, and the two groups of coupling drive mechanisms are fixedly connected by a sliding rod and rotatably connected by a pull rod; at least one and at most two sliding sleeves are sleeved on the sliding rod, a guide wheel rotatably connected to one of the sliding sleeves is limited in a guide groove on the base, and each of the sliding sleeves is fixedly connected to a door panel through a door carrying frame; the power source of the Sierra door is fixed on the pull rod, and the driving end of the power source is fixedly connected to the sliding sleeve connected to the guide wheel; the coupling drive mechanism can make reciprocating motion relative to the base under the drive of the power source.

[0007] Furthermore, in the two groups of the coupling drive mechanisms, the sliding bracket is fixedly connected by the sliding rod, and the driving arm is rotationally connected by the pulling rod; in the two groups of the coupling drive mechanisms, the sliding bracket in at least one group is installed on the base through a guiding mechanism, and can reciprocate relative to the base under the action of external force and the guiding mechanism; one end of the driving arm is rotationally connected to the base, and the other end is rotationally connected to the pulling rod; one end of the connecting arm is rotationally connected to the middle part of the driving arm, and the other end is rotationally connected to the sliding bracket. When the power source pulls or pushes the pull rod, the rotation connection point between the pull rod and the driving arms in the coupling drive mechanisms on both sides moves away from or approaches the rotation connection point between the connecting arm and the sliding bracket, so that the driving arm rotates counterclockwise or clockwise around the rotation connection point between it and the base, and the connecting arm rotates clockwise or counterclockwise around the rotation connection point between it and the driving arm, thereby forcing the sliding bracket to reciprocate relative to the base under the action of the guide mechanism; when the sliding bracket moves to the extreme position under the guidance of the guide mechanism, the coupling drive mechanisms on both sides are in a self-locking state, at which time the rotation connection point between the pull rod and the driving arm, the rotation connection point between the driving arm and the base, the rotation connection point between the driving arm and the connecting arm, and the rotation connection point between the connecting arm and the sliding bracket The four dynamic connection points are all located in the same straight line. At this time, even if the external force of the power source on the pull rod is released, the above four points will not easily deviate from the straight line because they are located in the same straight line; and the guide wheel arranged on the sliding sleeve moves along the sliding rod together with the sliding sleeve, and the sliding rod is an integrated structure with the sliding brackets on both sides, so when the door panel is closed, the guide wheel is just located in the guide groove, and the above four points are just located in the same straight line, so that when the door panel is closed, the pulling force or pushing force of the power source can be released, or the power source only needs to apply a smaller pulling force or pushing force to ensure that the above four points do not deviate from the same straight line, which can effectively prevent the guide wheel from sliding out of the guide groove, thereby achieving an effective door self-locking effect, saving power, and being green and environmentally friendly.

[0008] Furthermore, the guide mechanism is a guide wheel or a guide block, the guide wheel or the guide block is installed on the sliding bracket, and the guide wheel or the guide block is limited in a bracket guide groove opened on the base; under the drive of the power source and the guiding action of the bracket guide groove, the guide wheel or the guide block can reciprocate in the bracket guide groove. The guide wheel or guide block and the bracket guide groove are provided to enable the coupling drive mechanism to realize reciprocating motion. In actual application, at least one set of coupling drive mechanisms is provided with a guide wheel or guide block to cooperate with the bracket guide groove, or both sets of coupling drive mechanisms are provided with a guide wheel or guide block to cooperate with the bracket guide groove; when the power source pulls or pushes the pull rod, the connecting arm is driven by the driving arm, and then the sliding bracket is driven to reciprocate linearly up and down relative to the base in the cooperation of the guide wheel or guide block and the bracket guide groove, and then the two sets of coupling drive mechanisms, the pull rod, the power source, the sliding rod, the sliding sleeve and the guide wheel can reciprocate linearly up and down relative to the base absolutely synchronously, ensuring that the door panels on both sides are opened or closed absolutely synchronously, and effectively ensuring the balance of the door panels on both sides when closing or opening the door panels.

[0009] Preferably, the support guide groove is a waist-shaped groove. The waist-shaped support guide groove enables the guide wheel or guide block on the sliding support to perform linear reciprocating motion along the support guide groove.

[0010] Preferably, a group of the coupling drive mechanisms close to the guide wheel also includes a limit block, the limit block is fixed on the base, and the limit block and the pull rod are respectively located on both sides of the driving arm; when the rotation connection point between the pull rod and the driving arm moves to one side to the extreme position, the limit block presses against one side of the rotation connection point between the driving arm and the pull rod; when the rotation connection point between the pull rod and the driving arm moves to the other side to the extreme position, the limit block and the driving arm do not contact each other. The setting of the limit block makes it possible for the limit block to press against one side of the rotation connection point between the pull rod and the driving arm when the rotation connection point between the pull rod and the driving arm moves to the extreme position to one side (at this time the door panel is closed), the limit block presses against one side of the rotation connection point between the driving arm and the pull rod; if the power source used is a driving cylinder, then at this time the rotation connection point between the pull rod and the driving arm, the rotation connection point between the driving arm and the base, the rotation connection point between the driving arm and the connecting arm, and the rotation connection point between the connecting arm and the sliding bracket are located in the same straight line. At this time, the limit block presses against one side of the rotation connection point between the driving arm and the pull rod, so that the above four points can be kept in the same straight line. Even if the external force of the power source on the pull rod is released, the above four points will not easily deviate from the straight line because they are located in the same straight line; and the guide wheel arranged on the sliding sleeve slides along the sliding sleeve together with the sliding sleeve The rod moves, and the sliding rod is an integrated structure with the sliding brackets on both sides, so when the door panel is closed, the guide wheel is just located in the guide groove, and the above four points are just located in the same straight line. In this way, the pulling force or pushing force of the power source can be released when the door panel is closed, or the power source only needs to apply a smaller pulling force or pushing force to ensure that the above four points do not deviate from the same straight line, which can effectively prevent the guide wheel from sliding out of the guide groove, thereby achieving an effective self-locking effect of the car door, saving power, and being green and environmentally friendly; if the power source used is a driving motor, the above four points must exceed the above straight line and then tilt slightly to the side of the limit block, so that the driving motor has a self-locking function. At this time, the limit block is pressed against one side of the rotation connection point of the driving arm and the pull rod, which can also achieve an effective self-locking effect of the car door.

[0011] Preferably, the limit block is fixedly connected to the base by an adjusting bolt. With this design, the spacing between the limit block and the driving arm is adjustable. After the door panel is closed, if the power source is a driving cylinder, the limit block is adjusted by adjusting the adjusting bolt so that the above four points are just located in the same straight line and abut against the rotation connection point between the driving arm and the pull rod; if the power source is a driving motor, the limit block is adjusted by adjusting the adjusting bolt so that the above four points just exceed the above straight line and abut against the rotation connection point between the driving arm and the pull rod.

[0012] Furthermore, one side of the sliding brackets in the two groups of the shaft coupling drive mechanisms is also respectively provided with sliding rollers, and the sliding rollers cooperate with the slide rails provided on the base. The sliding rollers and the slide rails are provided to make the reciprocating motion of the shaft coupling drive mechanism more stable.

[0013] Preferably, the slide rail is a U-shaped slide rail.

[0014] Furthermore, if there are two sliding sleeves, there are two door panels, and the opposite side edges of the two door panels are respectively installed with center seam sealing strips, and the opposite side edges and the upper and lower side edges are respectively installed with side seam sealing strips; after closing the door panels on both sides, the center seam sealing strips on the door panels on both sides are sealed with each other by mortise and tenon joints, and the side seam sealing strips on the door panels on both sides are respectively sealed with the door frames on both sides; if there is one sliding sleeve, there is one door panel, and the four side edges of the door panel are all installed with the side seam sealing strips; after closing the door panel, the side seam sealing strips are respectively sealed with the door frames on the four sides of the door panel. The provision of the center seam sealing strip and the side seam sealing strip enables the plug door assembly to effectively seal the door panel after the door panel is closed, and prevent the door panel from shaking, wind, rain, etc. during vehicle operation.

[0015] Furthermore, the opposite sides of the strip bodies of the center seam sealing strips on both sides are respectively provided with mortise and tenon grooves and mortise and tenon protrusions for mortise and tenon matching, the mortise and tenon grooves of the strip body on one side are arranged opposite to the mortise and tenon protrusions of the strip body on the other side, and the opposite sides of the two strip bodies are respectively provided with center seam door panel claws for clamping in the door panel profiles on both sides. When installing the center seam sealing strips on the door panels on both sides, the center seam door panel claws on one side of the strip bodies on both sides can be clamped in the profiles on the opposite sides of the door panels on both sides, and it is necessary to pay attention to the positional relationship between the mortise and tenon grooves and the mortise and tenon protrusions to achieve an effective sealing effect.

[0016] Furthermore, the ends of the tenon grooves of the rubber strip bodies on both sides are respectively provided with middle seam water guide strips. The middle seam water guide strips are provided to prevent rainwater from the outside of the door panel from entering the door panel through the gap between the rubber strip bodies on both sides, and the middle seam water guide strips can timely guide rainwater entering through the gap between the rubber strip bodies on both sides from the outside of the vehicle to the bottom of the door panel to flow out.

[0017] Furthermore, the outer walls of the rubber strip bodies on both sides which are opposite to each other are respectively provided with middle seam outer sealing edges, which are used to seal the gap between the rubber strip body and the outer wall plane of the door panel.

[0018] Furthermore, the inner walls of the rubber strip bodies on both sides which are opposite to each other are respectively provided with inner sealing edges of the middle seam, which are used to seal the gap between the rubber strip body and the inner wall plane of the door panel.

[0019] Furthermore, the side of the side seam sealing rubber strip opposite to the door panel is provided with a side seam door panel clamping claw for clamping in the door panel profile. When installing the side seam sealing rubber strip, the side seam door panel clamping claw on one side thereof is clamped in the door panel profile.

[0020] Furthermore, the outer wall of the side seam sealing strip located on the same side as the side seam door panel claw is also provided with a door panel sealing edge, which is used to seal the gap between the side seam sealing strip and the plane of the door panel outer wall.

[0021] Furthermore, a door frame sealing edge is arranged on the outer side of the side seam sealing strip relative to the door frame, and the door frame sealing edge is used to seal the gap between the side seam sealing strip and the plane of the door frame outer wall.

[0022] Furthermore, a side seam water guide strip is provided on the inner wall of the side seam sealing strip opposite to the door frame. The side seam water guide strip is provided to prevent rainwater outside the door panel from entering the door panel through the gap between the side seam sealing strip and the door frame, and the side seam water guide strip can guide the rainwater entering from the outside to the bottom of the door panel in time to flow out.

[0023] Furthermore, a buffer hollow cavity is provided in the strip body of the side seam sealing strip. The provision of the buffer hollow cavity can, on the one hand, provide a certain buffering effect on the side seam sealing strip when the door is closed, and at the same time, make the side seam sealing strip have a greater deformation effect after being squeezed with the door frame, thereby improving the sealing effect of the side seam sealing strip, and on the other hand, can reduce the weight of the side seam sealing strip and save the cost of raw materials.

[0024] Furthermore, a rotating arm is provided on one side of the door panel, the upper end of the rotating arm is rotatably connected to the base, the two sets of the shaft coupling drive mechanisms are also rotatably connected to the upper part of the rotating arm through a rocker arm, and the lower end of the rotating arm is rotatably connected to the bottom of the door frame through a set of door panel positioning mechanisms. When the door panel is closed or opened, the reciprocating motion of the two sets of shaft coupling drive mechanisms will drive the rotating arms on both sides to rotate through the rocker arm, and when the door panel is closed, the rotating arm will position the door panel through the door panel positioning mechanism to prevent the door panel from shaking during the bumpy process of the vehicle.

[0025] Furthermore, in the door panel positioning mechanism, the door frame positioning plate is fixed on the door frame, and the positioning groove block is fixed on the door frame positioning plate; one end of the swing arm bracket is fixed on the lower part of the swing arm, and the other end is connected with a positioning roller, and the positioning roller is limited in the roller guide groove at the lower part of the door panel; the door panel positioning plate is fixed on the door panel, and the positioning protrusion on the door panel positioning plate cooperates with the positioning groove on the positioning groove block. When the power source pulls or pushes the pull rod, the shaft coupling mechanism reciprocates relative to the base, and the shaft coupling mechanism drives the swing arm to rotate through the rocker arm, and then the swing arm drives the swing arm bracket to rotate. The positioning roller rolls in the roller guide groove at the lower part of the door panel under the drive of the swing arm bracket. When the door panel is closed, the positioning protrusion is just embedded in the positioning groove to achieve the positioning of the door panel, so as to prevent the door panel from shaking when the vehicle is bumpy.

[0026] Furthermore, the door frame positioning plate is provided with a spacing adjustment slot, and the door frame positioning plate is fixed to the door frame after the bolt passes through the positioning groove block and the spacing adjustment slot. When the door panel positioning mechanism is installed on the plug door, if the spacing between the positioning groove block and the door panel positioning plate is larger or smaller after installation, the positioning protrusion on the door panel positioning plate cannot fit tightly with the positioning groove after the door is closed, or if the spacing is too tight, the door panel positioning mechanism may be easily damaged, and the door panel cannot be effectively prevented from shaking. At this time, the bolt needs to be loosened, and the position of the positioning groove block on the door frame positioning plate needs to be adjusted through the spacing adjustment slot, so that the positioning groove block is close to or away from the door panel positioning plate, and the bolt is tightened after the spacing between the two is appropriate. After the door is closed, the positioning protrusion just fits tightly with the positioning groove but not too tightly, so as to effectively prevent the door panel from shaking.

[0027] Furthermore, a top screw is fixed on the door panel positioning plate through a top screw shaft, and the top screw is embedded in the hollow inner wall at the bottom end of the rotating arm. The bottom end of the rotating arm is sleeved on the top screw on the door frame positioning plate, so that the rotating arm and the door frame positioning plate are an integrated structure with a compact and reasonable structure.

[0028] Preferably, the positioning groove is a long V-shaped groove parallel to the ground, and correspondingly, the positioning protrusion is a long triangular protrusion parallel to the ground. The cooperation between the long V-shaped groove and the long triangular protrusion can effectively position the positioning protrusion, so that the positioning protrusion can enter and exit the positioning groove without resistance in the horizontal direction, and will not move up and down in the vertical direction, so as to effectively prevent the door panel from shaking.

[0029] Furthermore, if there are two sliding sleeves, the plug sliding door is a double plug sliding door, and the plug sliding door assembly further includes a wire drawing and two wire drawing wheels respectively fixed on the two sets of the coupling drive mechanisms, and the two ends of the wire drawing are respectively passed around the two wire drawing wheels and then connected to one of the sliding sleeves. The plug sliding door assembly can be either a single plug sliding door assembly or a double plug sliding door assembly. The single plug sliding door assembly can be converted into a double plug sliding door assembly by only adding a wire drawing, two wire drawing wheels and a sliding sleeve.

[0030] Preferably, the power source is a driving cylinder, the driving cylinder is fixed on the pull rod, and the telescopic rod of the driving cylinder is fixedly connected to the sliding sleeve connected to the guide wheel.

[0031] Preferably, the power source is a driving motor, the driving motor is fixed on the pull rod, a lead screw is fixed on the output shaft of the driving motor, a lead screw nut is threadedly connected to the lead screw, and the lead screw nut is fixedly connected to the sliding sleeve connected to the guide wheel. The forward or reverse rotation of the driving motor drives the lead screw to rotate forward or reverse, and then the lead screw nut drives the sliding sleeve connected to the guide wheel to move right, left or right along the sliding rod, and then the guide wheel moves into or out of the guide groove.

[0032] Furthermore, if the power source is a drive motor, the plug door assembly further includes an emergency unlocking cylinder, which is fixed on the pull rod, and an unlocking spring fixed on the telescopic rod is parallel to the lead screw and is arranged opposite to the lead screw nut and the fixed connecting piece of the sliding sleeve. Under normal circumstances, when the plug door is closed, the emergency unlocking cylinder contracts, and the unlocking spring is always in a state of being compressed by the fixed connecting piece. When an emergency occurs and the drive motor is out of power and the door panel is in a closed state, the drive motor cannot drive the lead screw to reverse, and the sliding sleeve connected to the guide wheel cannot be driven to translate along the slide rod through the lead screw nut, and the guide wheel cannot be moved out of the guide groove. However, when the drive motor is out of power, it will not self-lock. At this time, the emergency unlocking cylinder can be manually pulled, and the compressed unlocking spring on the telescopic rod will quickly push out and push the fixed connecting piece, thereby pushing the lead screw nut to move along the lead screw in a direction away from the drive motor, and then the lead screw nut drives the sliding sleeve connected to the guide wheel to move until the guide wheel moves out of the guide groove, and at this time, the passengers in the car can push open the door panels on both sides to escape.

[0033] Preferably, the slide bar and the pull rod are parallel to each other. This design can realize the slide bar, the pull rod, the two sets of shaft coupling drive mechanisms, the sliding sleeve, the power source and the guide wheel to move in and out at the same time.

[0034] Working principle: When the plug sliding door assembly is in use, the driving end of the power source pulls or pushes at least one sliding sleeve, driving the guide wheel to move into or out of the guide groove. At the same time, the power source also exerts a force on the pull rod relative to the sliding sleeve, driving the pull rod to pull or push the two-side coupling drive mechanism together with the sliding rod to reciprocate relative to the base; under the above dual action, the sliding sleeve drives the door panel to close or open through the door carrier.

[0035] Beneficial effects: Compared with the prior art in which the power source is fixed on the door frame, the plug sliding door assembly has the following advantages:

[0036] (1) Since the power source in the present Sierra door assembly is fixed on the pull rod and its driving end is fixedly connected to the sliding sleeve, when the power source pulls or pushes the sliding sleeve to slide along the slide rod to close or open the door panel, the power source will also follow the shaft drive mechanisms on both sides to make reciprocating motion relative to the base. As a result, when the power source pulls or pushes the sliding sleeve to move, according to the interaction of forces, the power source will also pull or push the pull rod to move in the opposite direction. As a result, when closing or opening the door panel, the force applied by the power source to the sliding sleeve (i.e., the force applied by the power source to the guide wheel) will not only be applied to the guide wheel, but will also be dispersed to the shaft drive mechanisms on both sides, which can greatly reduce the damage to the guide wheel, save power, and be environmentally friendly.

[0037] (2) Due to the structural setting of the sliding door assembly, the coupling drive mechanisms on both sides, the guide wheel in the middle, the sliding rod, the pull rod and the power source can all reciprocate relative to the base in absolute synchronization, so that the forces distributed to the guide wheel and the coupling drive mechanisms on both sides can be balanced at three points, thereby ensuring that the sliding door can be very stable when closing or opening.

[0038] (3) In the present Sierra door assembly, the guide wheel on the Sierra door can make reciprocating motion relative to the base synchronously with the sliding bracket. When the door panel is closed under the action of the coupling drive mechanism, the guide wheel is just located in the guide groove. If the power source is a driving cylinder, the above four points are just located in the same straight line at this time. If the power source is a driving motor, the above four points are just beyond the above straight line. In this way, when the door panel is closed, the pulling force or pushing force on the pull rod can be released (when the driving source is a driving motor), so that the door self-locking effect can be achieved; or only a small pulling force or pushing force needs to be applied to the pull rod (when the driving source is a driving cylinder) to ensure that the above four points do not deviate from the same straight line, which can effectively prevent the guide wheel from sliding out of the guide groove, thereby achieving an effective door self-locking effect, saving power, and being green and environmentally friendly.

[0039] (4) The sliding plug door assembly can be either a single sliding plug door assembly or a double sliding plug door assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structure when the double-sliding door is closed;

[0041] Figure 2 for Figure 1 Schematic diagram of some structures in ;

[0042] Figure 3 for Figure 2 A schematic diagram of the enlarged structure within the middle dotted circle S1;

[0043] Figure 4 for Figure 2 A schematic diagram of the enlarged structure within the middle dotted circle S2;

[0044] Figure 5 It is a schematic diagram of the overall structure when the double-sliding door is opened;

[0045] Figure 6 for Figure 5 Schematic diagram of some structures in ;

[0046] Figure 7 for Figure 6 A schematic diagram of the enlarged structure within the middle dotted circle S1;

[0047] Figure 8 for Figure 6 A schematic diagram of the enlarged structure within the middle dotted circle S2;

[0048] Fig. 9 It is a schematic diagram of the overall structure when the double-sliding door is closed;

[0049] Fig.10 for Fig. 9 A schematic diagram of the enlarged structure within the middle dotted circle S1;

[0050] Fig.11 for Fig. 9 A schematic diagram of the enlarged structure within the middle dotted circle S2;

[0051] Fig.12 for Fig. 9 A schematic diagram of the enlarged structure within the middle dotted circle S3;

[0052] Fig.13 for Fig. 9 A schematic diagram of the enlarged structure within the middle dotted circle S4;

[0053] Fig.14 It is a three-dimensional structural schematic diagram of the door panel positioning mechanism;

[0054] Fig.15 for Fig.14 A partial structural diagram of

[0055] Fig.16 for Fig.14 A front view of

[0056] Fig.17 It is a top view of part of the structure when the double-sliding door is closed;

[0057] Fig.18 for Fig.17 A partial structural diagram of

[0058] Fig.19 It is a top view of part of the structure when the double sliding doors are opened;

[0059] Fig. 20 for Fig.19 A partial structural diagram of

[0060] Fig.21 It is a top view of the coupling drive mechanism when the door panel is fully closed;

[0061] Fig. 22 It is a top view of the coupling drive mechanism when the door panel is half-opened;

[0062] Fig.23 It is a top view of the coupling drive mechanism when the door panel is fully opened;

[0063] Fig.24 This is a cross-sectional view of the middle seam sealing strip assembly after being combined with the door panel;

[0064] Fig.25It is a cross-sectional view of the center seam sealing strip assembly;

[0065] Fig.26 This is a cross-sectional view of the side seam sealing strip combined with the door panel and door frame;

[0066] Fig. 27 It is a cross-sectional view of the side seam sealing strip;

[0067] Fig.28 It is a partial structural schematic diagram of a double-sliding door when the power source is a driving motor;

[0068] Fig.29 for Fig.28 It is a schematic diagram of the enlarged structure within the middle dotted circle S1;

[0069] Fig.30 It is a partial structural schematic diagram of a double-sliding door when the power source is a driving motor;

[0070] Among them, base 1, bracket guide groove 101, guide groove 102, roller guide groove 103, shaft driving mechanism 2, sliding bracket 201, driving arm 202, connecting arm 203, limit block 204, adjusting bolt 205, sliding rod 3, pull rod 4, sliding sleeve 5, drawing 6, drawing wheel 7, guide wheel 8, driving cylinder 9, door carrier 10, door panel 11, sliding roller 12, slide rail 13, guide wheel or guide block 14, door panel positioning mechanism 15, door panel positioning plate 1501, spacing adjustment groove 1502, positioning groove block 1503, bolt 1504, door frame positioning plate 1505, rotating arm bracket 1506, positioning roller 1507, positioning groove 1508, positioning protrusion 1509 , top screw shaft 1510, locking block 1511, limiting rod 1512, rotating arm 16, rocker arm 17, center seam sealing strip 18, strip body 1801, mortise and tenon groove 1802, mortise and tenon protrusion 1803, center seam water guide strip 1804, center seam door panel claw 1805, center seam outer sealing edge 1806, center seam inner sealing edge 1807, hollow cavity 1808, side seam sealing strip 19, side seam door panel claw 1901, door panel sealing edge 1902, door frame sealing edge 1903, side seam water guide strip 1904, buffer hollow cavity 1905, door frame 20, drive motor 21, screw 22, screw nut 23, emergency unlocking cylinder 24, fixed connecting piece 25, unlocking spring 26. DETAILED DESCRIPTION

[0071] The present invention is described in detail below in conjunction with the accompanying drawings.

[0072] Implementation 1:

[0073] This embodiment provides a double plug sliding door assembly, such as Figures 1 to 11As shown in 17 to 23, it mainly consists of a base 1 fixed on a door frame 20, two sets of coupling drive mechanisms 2, a sliding rod 3, a pulling rod 4, two sliding sleeves 5, a wire drawing 6, two wire drawing wheels 7, a guide wheel 8, a power source, two door carrying frames 10 and two door panels 11.

[0074] Two sets of shaft coupling drive mechanisms 2 are respectively installed at both ends of the upper part of the base 1. The two sets of shaft coupling drive mechanisms 2 are mainly composed of a sliding bracket 201, a driving arm 202 and a connecting arm 203. The sliding brackets 201 in the two sets of shaft coupling drive mechanisms 2 are fixedly connected by a sliding rod 3, and the driving arm 202 is rotatably connected by a pull rod 4. The sliding rod 3 and the pull rod 4 are parallel to each other. In each set of shaft coupling drive mechanisms 2, a sliding bracket 201 in one set is installed on the base 1 through a guide mechanism, and can reciprocate relative to the base 1 under the action of external force and the guide mechanism; the guide mechanism is a guide wheel or a guide block 14, which is installed on the sliding bracket 201, and the guide wheel or the guide block 14 is limited in a waist-shaped bracket guide groove 101 opened on the base 1; under the driving action of the power source and the guiding action of the bracket guide groove 101, the guide wheel or the guide block 14 can reciprocate in the bracket guide groove 101. One side of the sliding bracket 201 in the two sets of shaft coupling drive mechanisms 2 is also respectively installed with a sliding roller 12, and the sliding roller 12 cooperates with the U-shaped slide rail 13 set on the base 1. One end of the driving arm 202 in the shaft coupling drive mechanism 2 is rotatably connected to the base 1, and the other end is rotatably connected to the pull rod 4; one end of the connecting arm 203 is rotatably connected to the middle part of the driving arm 202, and the other end is rotatably connected to the sliding bracket 201. The set of shaft coupling drive mechanisms 2 near the guide wheel 8 also includes a limit block 204 fixed to the base 1 by an adjusting bolt 205, and the limit block 204 and the pull rod 4 are respectively located on both sides of the driving arm 202.

[0075] When the rotation connection point between the pull rod 4 and the driving arm 202 moves to one side to the extreme position, the limit block 204 presses against one side of the rotation connection point between the driving arm 202 and the pull rod 4; at this time, the rotation connection point between the pull rod 4 and the driving arm 202, the rotation connection point between the driving arm 202 and the base 1, the rotation connection point between the driving arm 202 and the connecting arm 203, and the rotation connection point between the connecting arm 203 and the sliding bracket 201 are located on the same straight line; when the rotation connection point between the pull rod 4 and the driving arm 202 moves to the other side to the extreme position, the limit block 204 and the driving arm 202 do not contact each other.

[0076] Two sliding sleeves 5 are sleeved on the sliding rod 3, and the two ends of the wire drawing 6 are connected to the two sliding sleeves 5 after passing through two drawing wheels 7 fixed on two sliding brackets 201; the guide wheel 8 rotatably connected to one of the sliding sleeves 5 is limited in the guide groove 102 on the base 1, and the two sliding sleeves 5 are respectively fixedly connected with door panels 11 through door carrying frames 10; the power source of the Sierra door is fixed on the pull rod 4. In this embodiment, the power source preferably uses a driving cylinder 9, which is fixed on the pull rod 4, and its telescopic rod is fixedly connected to the sliding sleeve 5 connected with the guide wheel 8.

[0077] The working principle of the plug sliding door assembly in this embodiment is as follows:

[0078] When the door panels 11 on both sides of the plug sliding door assembly need to be closed, the driving end of the driving cylinder 9 pulls the sliding sleeve 5 on one side, and the sliding sleeves 5 on both sides slide relatively along the slide rod 3 under the action of the wire drawing 6, and then the guide wheel 8 follows the sliding sleeve 5 and moves into the guide groove 102 under the guidance of the guide groove 102. At the same time, the driving cylinder 9 also exerts a force on the pull rod 4 opposite to the sliding sleeve 5, driving the pull rod 4 to push the two side coupling drive mechanisms 2 together with the slide rod 3 to make a straight line movement close to the inside of the vehicle. The specific process is as follows:

[0079] The driving cylinder 9 drives the rotation connection point between the pull rod 4 and the driving arm 202 in the two-side coupling drive mechanism 2 to approach the rotation connection point between the connecting arm 203 and the sliding bracket 201, so that the driving arm 202 rotates clockwise around the rotation connection point between it and the base 1, and the connecting arm 203 rotates counterclockwise around the rotation connection point between it and the driving arm 202, thereby forcing the sliding bracket 201 in the one-side coupling drive mechanism 2 to be guided by the guide wheel 14 and the bracket guide groove 101 and the sliding roller 12 and the slide rail 13, and the sliding bracket 201 in the other-side coupling drive mechanism 2 to be guided by the sliding roller 12 and the slide rail 13. It moves linearly toward the inside of the vehicle relative to the bracket guide groove 101; the guide wheel 8 and the door carrying frame 10 arranged on the sliding sleeve 5 move along the sliding rod 3 together with the sliding sleeve 5, and the sliding rod 3 and the pull rod 4 are connected with the sliding brackets 201 on both sides. Therefore, when the sliding bracket 201 moves to the extreme position of the bracket guide groove 101 close to the inside of the vehicle, the sliding rod 3, the pull rod 4, the driving cylinder 9, the sliding sleeve 5 and the guide wheel 8 and the door carrying frame 10 thereon, as well as the door panels 11 on both sides fixed under the door carrying frame 10 will all move linearly toward the inside of the vehicle together with the sliding bracket 201. Under the above dual effects, the door panels 11 on both sides are closed.

[0080] In the above process, when the guide wheel 14 of the sliding bracket 201 moves to the extreme position of the bracket guide groove 101 close to the inner side of the vehicle, the coupling drive mechanisms 2 on both sides are in a self-locking state. At this time, the four points of the rotation connection point between the pull rod 4 and the driving arm 202, the rotation connection point between the driving arm 202 and the base 1, the rotation connection point between the driving arm 202 and the connecting arm 203, and the rotation connection point between the connecting arm 203 and the sliding bracket 201 are all located on the same straight line, and the limit block 204 just rests on one side of the rotation connection point between the pull rod 4 and the driving arm 202. At this time, even if the external force of the driving cylinder 9 on the pull rod 4 is released, the above four points will not easily deviate from the straight line because they are located on the same straight line. In this way, when the door panel 11 is closed, the pulling force of the driving cylinder 9 can be released, or the driving cylinder 9 only needs to apply a smaller pulling force to ensure that the above four points do not deviate from the same straight line, which can effectively prevent the guide wheel 8 from sliding out of the guide groove 102, thereby achieving an effective door self-locking effect, saving power, and being green and environmentally friendly.

[0081] When the door panels 11 on both sides of the plug sliding door assembly need to be opened, the driving end of the driving cylinder 9 pushes the sliding sleeve 5 on one side, and the sliding sleeves 5 on both sides slide toward each other along the slide rod 3 under the action of the wire drawing 6 and the wire drawing wheel 7, and then the guide wheel 8 follows the sliding sleeve 5 and moves out of the guide groove 102 under the guidance of the guide groove 102. At the same time, the driving cylinder 9 also exerts a force on the pull rod 4 relative to the sliding sleeve 5 connected with the guide wheel 8, driving the pull rod 4 to push the two side coupling drive mechanisms 2 together with the slide rod 3 to move linearly away from the inside of the vehicle. The specific process is as follows:

[0082] The driving cylinder 9 drives the rotation connection point between the pull rod 4 and the driving arm 202 in the two-side coupling drive mechanism 2 to move away from the rotation connection point between the connecting arm 203 and the sliding bracket 201, so that the driving arm 202 rotates counterclockwise around the rotation connection point between it and the base 1, and the connecting arm 203 rotates clockwise around the rotation connection point between it and the driving arm 202, thereby forcing the sliding bracket 201 in the coupling drive mechanism 2 on one side to move under the dual guidance of the guide wheel 14 and the bracket guide groove 101 and the sliding roller 12 and the slide rail 13, and the sliding bracket 201 in the other side can move under the dual guidance of the guide wheel 14 and the bracket guide groove 101 and the sliding roller 12 and the slide rail 13. The sliding bracket 201 in the one-side coupling drive mechanism 2 moves linearly toward the outside of the vehicle relative to the bracket guide groove 101 under the action of the sliding roller 12 and the sliding rail 13; when the sliding bracket 201 moves to the extreme position of the bracket guide groove 101 away from the inside of the vehicle, the sliding rod 3, the pull rod 4, the driving cylinder 9, the sliding sleeve 5 and the guide wheel 8 and the door carrying frame 10 thereon, as well as the door panels 11 on both sides fixed under the door carrying frame 10 will all move linearly away from the inside of the vehicle together with the sliding bracket 201. Under the above dual action, the door panels 11 on both sides are opened.

[0083] Since the driving cylinder 9 in the plug door assembly is fixed on the pull rod 4 and its driving end is fixedly connected to the sliding sleeve 5, when the driving cylinder 9 pulls or pushes the sliding sleeve 5 on one side to slide the sliding sleeves 5 on both sides along the slide rod 3 relative to or towards each other to close or open the door panel 11, the driving cylinder 9 will also follow the sliding brackets 201 in the shaft driving mechanism 2 on both sides to make reciprocating motion relative to the base 1. In this way, when the driving cylinder 9 pulls or pushes the sliding sleeve 5 to move, according to the interaction of forces, the driving cylinder 9 will also pull or push the pull rod 4 to move in the opposite direction. When closing or opening the door panels 11 on both sides, the force applied by the drive cylinder 9 to the sliding sleeve 5 (i.e., the force applied by the drive cylinder 9 to the guide wheel 8) will not only be applied to the guide wheel 8, but will also be dispersed to the coupling drive mechanisms 2 on both sides. Due to the structural arrangement of this Sierra door assembly, the coupling drive mechanisms 2 on both sides, the middle guide wheel 8, the slide rod 3, the pull rod 4 and the drive cylinder 9 can all reciprocate relative to the base 1 at the same time, so that the force dispersed to the guide wheel 8 and the coupling drive mechanisms 2 on both sides can be balanced at three points, thereby ensuring that this Sierra door can be very stable when closed or opened.

[0084] Implementation 2:

[0085] The present embodiment provides a single-plug sliding door assembly, which has a structure roughly the same as the double-plug sliding door assembly in Embodiment 1. Only one sliding sleeve, the wire drawing and two wire drawing wheels in the double-plug sliding door assembly need to be removed. The remaining structure and working principle are exactly the same and will not be elaborated here.

[0086] Implementation 3:

[0087] This embodiment is a further improvement of the embodiment 1, and the main improvement is that in the plug door assembly in the embodiment 1, only the top ends of the door panels 11 on both sides enter the guide groove 102 for positioning through the guide wheel 8, and there is no positioning mechanism at the bottom ends of the door panels 11, which will cause the bottom ends of the door panels 11 to shake easily when the vehicle encounters bumpy conditions during driving. In this embodiment, a door panel positioning mechanism 15 for positioning the bottom ends of the door panels 11 on both sides is added to the plug door assembly, which effectively prevents the bottom ends of the door panels 11 on both sides from shaking unsteadily during driving.

[0088] Specifically, if Figures 12 to 16 In the Sierra door assembly in this embodiment, two rotating arms 16 are respectively provided on both sides of the two door panels 11, and the upper and lower ends of the two rotating arms 16 are respectively rotatably connected to the base 1, and the two sets of coupling drive mechanisms 2 are also rotatably connected to the upper parts of the two rotating arms 16 through rocker arms 17, and the lower parts of the two rotating arms 16 are respectively connected to the bottom of the door panels 11 on both sides through a set of door panel positioning mechanisms 15.

[0089] In the door panel positioning mechanism 15, a spacing adjustment groove 1502 is provided on the door frame positioning plate 1505, and the positioning groove block 1503 is fixed to the door frame positioning plate 1505 after the bolt 1504 passes through its bolt hole, the spacing adjustment groove 1502 and the locking block 1511 in sequence, and then the door frame positioning plate 1505 is fixed to the door frame 20 by the bolt 1504; one end of the swing arm bracket 1506 is fixed to the lower part of the swing arm 16, and the other end is connected to the positioning roller 1507, and a limiting rod 1512 is also fixed to the bottom surface of the swing arm bracket 1506. The setting of the limiting rod 1502 enables the swing arm bracket 1506 to resist the door frame positioning plate 1505 when the door panel 11 is opened, so as to prevent the swing arm bracket 1506 from rotating beyond the limit and causing the bottom and upper part of the door panel 11 to be unbalanced. The positioning roller 1507 is limited in the roller guide groove 103 at the lower part of the door panel 11; a top screw is also fixed on the door frame positioning plate 1505, and the top screw is nested in the hollow inner wall at the bottom end of the rotating arm 16 through the top screw shaft 1510, that is, the bottom end of the rotating arm 16 is rotatably connected to the lower part of the door frame 20 through the top screw outer wall sleeved on the door frame positioning plate 1505; the door panel positioning plate 1501 is fixed on the door panel 11, and the positioning protrusion 1509 on the door panel positioning plate 1501 cooperates with the positioning groove 1508 on the positioning groove block 1503. The positioning groove 1508 is preferably a long strip V-shaped groove parallel to the ground, and correspondingly, the positioning protrusion 1509 is preferably a long strip triangular protrusion parallel to the ground. When the door panels 11 on both sides are closed or opened, the reciprocating motion of the sliding brackets 201 in the two sets of shaft driving mechanisms 2 will drive the rotating arms 16 on both sides to rotate through the rocker arms 17 on both sides. When the door panels 11 on both sides are closed, the rotating arms 16 on both sides will position the door panels 11 on both sides through the door panel positioning mechanisms 15 on both sides to prevent the door panels 11 from shaking during the bumpy process of the vehicle. The specific process is as follows:

[0090] When the driving cylinder 9 pulls (or pushes) the sliding sleeve 5, the pull rod 4 pushes (or pulls) the sliding bracket 201 in the shaft driving mechanism 2 to move back and forth in a straight line relative to the bracket guide groove 101 toward (or away from) the inner side of the vehicle. The rocker arm 17, one end of which is rotatably connected to the sliding bracket 201 and the other end of which is rotatably connected to the lower part of the rotating arm 16, drives the rotating arm 16 to rotate counterclockwise (or clockwise) under the drive of the sliding bracket 201, and then the rotating arm 16 drives the rotating arm bracket 1506 to rotate counterclockwise (or clockwise). When rotating clockwise (or counterclockwise), the positioning roller 1507, driven by the swing arm bracket 1506, rolls in the roller guide groove 103 at the lower part of the door panel 11 from a position close to (or away from) the door frame 20 to a position away from (close to) the door frame 20, thereby driving the door panels 11 on both sides to move relative to (or toward) each other until they are closed (or opened), and the positioning protrusion 1509 just fits into (or moves out of) the positioning groove 1508, thereby positioning the door panel 11 and preventing the door panel 11 from shaking when the vehicle is bumpy.

[0091] When the door panel positioning mechanism 15 is installed on the Sierra door, if the spacing between the positioning groove block 1503 and the door panel positioning plate 1501 is larger or smaller after installation, then after the door panels 11 on both sides are closed, the positioning protrusion 1509 on the door panel positioning plate 1501 cannot fit tightly with the positioning groove 1508 or fits too tightly, which may easily damage the door panel positioning mechanism 15 and cannot effectively prevent the door panel 11 from shaking. At this time, it is necessary to loosen the bolt 1504 and adjust the position of the positioning groove block 1503 on the door panel positioning plate 1501 through the spacing adjustment slot 1502 to make the positioning groove block 1503 close to or away from the door panel positioning plate 1501 until the spacing between the two is appropriate, then tighten the bolt 1504, and after closing the door, the positioning protrusion 1509 fits tightly with the positioning groove 1508 but not too tightly, thereby achieving the purpose of effectively preventing the door panel 11 from shaking.

[0092] Apart from this, this embodiment is completely the same as Embodiment 1 and will not be described in detail here.

[0093] Implementation 4:

[0094] This embodiment is a further improvement of the embodiment 3, and the main improvement is that in the plug door assembly of the embodiment 3, after the door panels 11 on both sides are closed, there is a certain gap between the door panels 11 on both sides and between the door panels 11 on both sides and the door frame 20, resulting in insufficient sealing. In windy and rainy weather, wind or rain can easily enter the vehicle through the gap. In addition, the gap will also cause the door panels 11 on both sides to shake unsteadily during the driving of the vehicle. In this embodiment, the above problems are effectively solved by adding a middle seam sealing strip 18 and a side seam sealing strip 19.

[0095] Specifically, if Figures 24 to 27In the Sierra door assembly in this embodiment, the opposite side edges of the two door panels 11 are respectively installed with center seam sealing strips 18, and the opposite side edges and the upper and lower side edges are respectively installed with side seam sealing strips 19; after closing the door panels 11 on both sides, the center seam sealing strips 18 on the door panels 11 on both sides are sealed with mortise and tenon joints, and the side seam sealing strips 19 on the door panels 11 on both sides are respectively sealed with the door frames 20 on both sides and the top base 1. The opposite sides of the strip bodies 1801 of the center seam sealing strips 18 on both sides are respectively provided with mortise and tenon grooves 1802 and mortise and tenon protrusions 1803 for mortise and tenon matching, and the mortise and tenon protrusions 1803 have a hollow cavity 1808. The mortise and tenon grooves 1802 of the strip body 1801 on one side are arranged opposite to the mortise and tenon protrusions 1803 of the strip body 1801 on the other side, and the ends of the mortise and tenon grooves 1802 of the strip bodies 1801 on both sides are also respectively provided with center seam water guide strips 1804; the opposite sides of the two strip bodies 1801 are respectively provided with center seam door panel claws 1805 for clamping in the door panel 11 profiles on both sides, and the opposite outer walls are also respectively provided with center seam outer sealing edges 1806, and the opposite inner walls are also respectively provided with center seam inner sealing edges 1807. A side seam door panel claw 1901 for clamping in the door panel 11 profile is provided on the side of the side seam sealing strip 19 opposite to the door panel 11, and a door panel sealing edge 1902 is also provided on the outer wall of the side seam sealing strip 19 located on the same side as the side seam door panel claw 1901; a door frame sealing edge 1903 is provided on the outer side of the side of the side of the side sealing strip 19 opposite to the door frame 20, and a side seam water guide strip 1904 is provided on the inner wall of the side opposite to the door frame 20; a buffer hollow cavity 1905 is provided in the side seam sealing strip 19.

[0096] When installing the center seam sealing strip 18 on the door panels 11 on both sides, just clamp the center seam door panel claw 1805 on one side of the strip body 1801 on both sides into the profile on the opposite side of the door panels 11 on both sides. When installing the side seam sealing strip 19, just clamp the side seam door panel claw 1901 on one side into the profile of the door panel 11.

[0097] When the door panels 11 on both sides are closed, the mortise and tenon grooves 1802 and the mortise and tenon protrusions 1803 in the above-mentioned center seam sealing strip 18 are mortise and tenoned and squeezed together, and the center seam water guide strip 1804 can promptly guide rainwater entering from the outside of the vehicle through the gap between the strip bodies 1801 on both sides to the bottom of the door panel 11 to flow out, and the center seam outer sealing edge 1806 effectively seals the gap between the center seam sealing strip 18 and the outer wall plane of the door panel 11, and the center seam inner sealing edge 1807 effectively seals the gap between the center seam sealing strip 18 and the inner wall plane of the door panel 11. The door panel sealing edge 1902 in the above-mentioned side seam sealing strip 19 effectively seals the gap between the side seam sealing strip 19 and the outer wall plane of the door panel 11, the door frame sealing edge 1903 effectively seals the gap between the side seam sealing strip 19 and the outer wall plane of the door frame 20 and the base 1, and the side seam water guide strip 1904 can guide rainwater entering from outside the vehicle through the gap between the side seam sealing strip 19 and the door frame 20 to the bottom of the door panel 11 to flow out in time.

[0098] The coordinated use of the center seam sealing strip 18 and the side seam sealing strip 19 enables the Sierra door assembly to effectively seal the door panel 11 after the door panel 11 is closed, thereby preventing the door panel 11 from shaking, being exposed to wind, rain, etc. during vehicle operation.

[0099] Apart from this, this embodiment is exactly the same as Embodiment 3 and will not be described in detail here.

[0100] Implementation 5:

[0101] This embodiment is substantially the same as the first embodiment, with the main difference being that in the Sierra door assembly in the first embodiment, the power source is the drive cylinder 9 , while in this embodiment, the power source is the drive motor 21 .

[0102] like Fig.28 and 29 As shown, the driving motor 21 is fixed on the tie rod 4, and a lead screw 22 is fixed on its output shaft, and a lead screw nut 23 is threadedly connected to the lead screw 22, and the lead screw nut 23 is fixedly connected to the sliding sleeve 5 connected to the guide wheel 8. The forward or reverse rotation of the driving motor 21 drives the lead screw 22 to rotate forward or reverse, and then the lead screw nut 23 drives the sliding sleeve 5 connected to the guide wheel 8 to move right, left or right along the slide rod 3, and then the guide wheel 8 moves into or out of the guide groove 102. Similarly, since the driving motor 21 is fixed on the tie rod 4, the driving motor 21 will also have a force on the tie rod 4 that is opposite to the force on the sliding sleeve 5 connected to the guide wheel 8, driving the tie rod 4 to push the two-side coupling drive mechanism 2 together with the slide rod 3 to move linearly away from the inner side of the vehicle.

[0103] Different from the power source being the driving cylinder 9, when the power source is the driving motor 21, when the door panel 11 is closed, the driving motor 21 can achieve a self-locking effect only when the four points of the rotation connection point between the pull rod 4 and the driving arm 202, the rotation connection point between the driving arm 202 and the base 1, the rotation connection point between the driving arm 202 and the connecting arm 203, and the rotation connection point between the connecting arm 203 and the sliding bracket 201 exceed the above-mentioned same straight line. That is, when the power source is the driving motor 21, the above-mentioned four points are not located in the same straight line when the door panel 11 is closed, but are limited by the limit block 204 against the rotation connection point between the driving arm 202 and the pull rod 4 just after exceeding the above-mentioned same straight line.

[0104] Apart from this, this embodiment is completely the same as Embodiment 1 and will not be described in detail here.

[0105] Implementation 6:

[0106] This embodiment is a further improvement of the embodiment 5, and the main improvement is that in the plug sliding door assembly in the embodiment 5, when an emergency occurs after the plug sliding door is closed and the driving motor 21 is out of power, the lead screw 22 cannot be reversed, and the sliding sleeve 5 connected to the guide wheel 8 cannot be driven to translate along the slide rod 3 through the lead screw nut 23, and the guide wheel 8 cannot be moved out of the guide groove 102, which makes it difficult for passengers in the car to escape. The present embodiment can solve the above problems.

[0107] Specifically, if Fig.30 The plug door assembly in this embodiment also includes an emergency unlocking cylinder 24, which is fixed on the pull rod 4. The unlocking spring 26 fixed on its telescopic rod is parallel to the screw 22 and is arranged opposite to the fixed connecting piece 25 of the screw nut 23 and the sliding sleeve 5.

[0108] When an emergency occurs after the Sierra door is closed and the drive motor 21 is out of power and cannot open the door, the emergency unlocking cylinder 24 can be manually pulled, and the compressed unlocking spring 26 on its telescopic rod will quickly push open the fixed connecting plate 25, thereby pushing the screw nut 23 to move along the screw 22 away from the drive motor 21, and then the screw nut 23 drives the sliding sleeve 5 connected to the guide wheel 8 to move until the guide wheel 8 moves out of the guide groove 102. At this time, the passengers in the car can push open the door panels 11 on both sides to escape.

[0109] Apart from this, this embodiment is exactly the same as embodiment 5 and will not be described in detail here.

[0110] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A sliding plug door assembly, characterized in that: It comprises a base fixed on the upper part of the door frame, and a group of coupling drive mechanisms are respectively installed at both ends of the base, and the two groups of coupling drive mechanisms are mainly composed of a sliding bracket, a driving arm and a connecting arm, wherein the sliding bracket is fixedly connected by a sliding rod, and the driving arm is rotatably connected by a pull rod, one end of the driving arm is rotatably connected to the base, and the other end is rotatably connected to the pull rod; one end of the connecting arm is rotatably connected to the middle part of the driving arm, and the other end is rotatably connected to the sliding bracket; at least one and at most two sliding sleeves are sleeved on the sliding rod, and a guide wheel rotatably connected to one of the sliding sleeves is limited in a guide groove on the base, and each of the sliding sleeves is fixedly connected to a door panel through a door carrying frame; the power source of the sliding door is fixed on the pull rod, and the driving end of the power source is fixedly connected to the sliding sleeve connected to the guide wheel; In the two groups of the coupling drive mechanisms, the sliding bracket in at least one group is installed on the base through a guide mechanism, and can reciprocate relative to the base under the action of a power source and the guide mechanism; One side of the sliding bracket in the two sets of the coupling drive mechanisms is also respectively installed with a sliding roller, and the sliding roller cooperates with the sliding rail arranged on the base.

2. The plug door assembly according to claim 1, characterized in that: The guide mechanism is a guide wheel or a guide block, which is installed on the sliding bracket and is limited in a bracket guide groove opened on the base; under the drive of the power source and the guiding action of the bracket guide groove, the guide wheel or the guide block can reciprocate in the bracket guide groove.

3. The plug door assembly according to claim 2, characterized in that: The support guide groove is a waist-shaped groove.

4. The plug door assembly according to claim 1, characterized in that: A group of the coupling drive mechanisms near the guide wheel also includes a limit block, the limit block is fixed on the base, and the limit block and the pull rod are respectively located on both sides of the drive arm; When the rotation connection point between the pull rod and the driving arm moves to one side to an extreme position, the limit block abuts against one side of the rotation connection point between the driving arm and the pull rod; When the rotation connection point between the pull rod and the driving arm moves to the other side to the limit position, the limit block and the driving arm do not contact each other.

5. The plug door assembly according to claim 4, characterized in that: The limit block is fixedly connected to the base through an adjusting bolt.

6. The plug door assembly according to claim 1, characterized in that: The slide rail is a U-shaped slide rail.

7. The plug door assembly according to claim 1, characterized in that: If there are two sliding sleeves, there are two door panels, and the opposite side edges of the two door panels are respectively installed with center seam sealing strips, and the opposite side edges and the upper and lower side edges are respectively installed with side seam sealing strips; after closing the door panels on both sides, the center seam sealing strips on the door panels on both sides are sealed with mortise and tenon joints, and the side seam sealing strips on the door panels on both sides are respectively sealed with the door frames on both sides; If there is one sliding sleeve, there is one door panel, and the four side edges of the door panel are all installed with the side seam sealing strips; after closing the door panel, the side seam sealing strips respectively cooperate with the door frames on the four sides of the door panel to seal.

8. The plug door assembly according to claim 7, characterized in that: The opposite sides of the strip bodies of the center seam sealing strips on both sides are respectively provided with mortise and tenon grooves and mortise and tenon protrusions for mortise and tenon matching, the mortise and tenon grooves of the strip body on one side are arranged opposite to the mortise and tenon protrusions of the strip body on the other side, and the opposite sides of the two strip bodies are respectively provided with center seam door panel claws for clamping in the door panel profiles on both sides.

9. The plug door assembly according to claim 8, characterized in that: The ends of the mortise and tenon grooves of the rubber strip bodies on both sides are also respectively provided with middle seam water guide strips.

10. The sliding plug door assembly according to claim 8, characterized in that: The outer walls of the rubber strip bodies at both sides which are opposite to each other are also provided with middle seam outer sealing edges respectively.

11. The sliding plug door assembly according to claim 8, characterized in that: The inner walls of the rubber strip bodies at both sides which are opposite to each other are also provided with inner sealing edges of the middle seam.

12. The sliding plug door assembly according to claim 7, characterized in that: The side of the side seam sealing rubber strip opposite to the door panel is provided with a side seam door panel clamping claw for clamping in the door panel profile.

13. The plug door assembly according to claim 12, characterized in that: The outer wall of the side seam sealing strip located on the same side as the side seam door panel clamping claw is also provided with a door panel sealing edge.

14. The sliding plug door assembly according to claim 12, characterized in that: A door frame sealing edge is arranged on the outer side of the side seam sealing rubber strip opposite to the door frame.

15. The sliding plug door assembly according to claim 12, characterized in that: The inner wall of the side seam sealing rubber strip opposite to the door frame is provided with a side seam water guide strip.

16. The sliding plug door assembly according to claim 12, characterized in that: A buffer hollow cavity is arranged in the side seam sealing rubber strip.

17. The sliding plug door assembly according to any one of claims 1 to 16, characterized in that: A swivel arm is also provided on one side of the door panel, the upper end of the swivel arm is rotatably connected to the base, the two sets of coupling drive mechanisms are also rotatably connected to the upper part of the swivel arm through rocker arms respectively, and the lower end of the swivel arm is rotatably connected to the bottom of the door frame through a set of door panel positioning mechanisms.

18. The sliding plug door assembly according to claim 17, characterized in that: In the door panel positioning mechanism, a door frame positioning plate is fixed on the door frame, and a positioning groove block is fixed on the door frame positioning plate; one end of a swivel arm bracket is fixed on the lower part of the swivel arm, and the other end is connected with a positioning roller, and the positioning roller is limited in the roller guide groove at the lower part of the door panel; a door panel positioning plate is fixed on the door panel, and the positioning protrusion on the door panel positioning plate cooperates with the positioning groove on the positioning groove block.

19. The sliding plug door assembly according to claim 18, characterized in that: The door frame positioning plate is provided with a spacing adjustment groove, and the door frame positioning plate is fixed to the door frame after bolts pass through the positioning groove block and the spacing adjustment groove.

20. The sliding plug door assembly according to claim 18, characterized in that: A top screw is also fixed on the door frame positioning plate through a top screw shaft, and the top screw is embedded in the hollow inner wall at the bottom end of the rotating arm.

21. The sliding plug door assembly according to claim 18, characterized in that: The positioning groove is a long V-shaped groove parallel to the ground, and correspondingly, the positioning protrusion is a long triangular protrusion parallel to the ground.

22. The sliding plug door assembly according to any one of claims 1 to 16, characterized in that: If there are two sliding sleeves, the plug sliding door is a double plug sliding door, and the plug sliding door assembly also includes a wire drawing and two wire drawing wheels respectively fixed on the two groups of the coupling drive mechanisms, and the two ends of the wire drawing are respectively passed around the two wire drawing wheels and then connected to one of the sliding sleeves.

23. The sliding plug door assembly according to any one of claims 1 to 16, characterized in that: The power source is a driving cylinder, which is fixed on the pull rod, and a telescopic rod of the driving cylinder is fixedly connected to a sliding sleeve connected to the guide wheel.

24. The sliding plug door assembly according to any one of claims 1 to 16, characterized in that: The power source is a driving motor, which is fixed on the pull rod. A lead screw is fixed on the output shaft of the driving motor, a lead screw nut is threadedly connected to the lead screw, and the lead screw nut is fixedly connected to a sliding sleeve connected to the guide wheel.

25. The sliding plug door assembly according to claim 24, characterized in that: It also includes an emergency unlocking cylinder, which is fixed on the pull rod. The unlocking spring fixed on the telescopic rod is parallel to the lead screw and is arranged opposite to the fixed connecting piece of the lead screw nut and the sliding sleeve.

26. The sliding plug door assembly according to any one of claims 1 to 16, characterized in that: The sliding rod and the pulling rod are parallel to each other.

Images