Plug door driving device and plug door

Abstract

The present invention relates to the field of plug sliding doors, and discloses a plug sliding door driving device and a plug sliding door, wherein a set of coupling drive mechanisms are respectively installed at both ends of a base, the two sets of coupling drive mechanisms are fixedly connected by a sliding rod and rotatably connected by a pull rod, at least one sliding sleeve is 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; the 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 coupling drive mechanism reciprocates relative to the base under the drive of the power source. The device disperses the force originally concentrated on the guide wheel to the guide wheel and the coupling drive mechanisms on both sides thereof by setting the coupling drive mechanism and changing the installation position of the plug sliding door power source, so that the plug sliding door is very stable when opened or closed, avoiding the phenomenon that the guide wheel automatically disengages from the guide groove, and can reduce the damage of the guide wheel.

Description

Technical Field

[0001] The present invention relates to the field of plug sliding doors, and in particular to a plug sliding door driving device and a plug sliding door. 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-in door driving device and a plug-in door. In the plug-in door driving device, by setting a coupling drive mechanism and changing the installation position of the plug-in 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-in 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 of the guide wheel, save power, and be environmentally friendly.

[0006] Technical solution: The present invention provides a Sierra door driving device, comprising a base, with a group of coupling drive mechanisms installed at both ends of the base respectively, the two groups of the coupling drive mechanisms are fixedly connected by a sliding rod and rotatably connected by a pulling rod, at least one sliding sleeve is 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; the power source of the Sierra door is fixed on the pulling 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] Further, the guide mechanism is a guide wheel or a guide block, which is mounted on the sliding bracket, and the guide wheel or the guide block is limited in the bracket guide groove provided on the base; under the driving action 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. 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 under the cooperation of the sliding roller or the guide block and the bracket guide groove, and then the two sets of shaft coupling drive mechanisms, the pull rod, the power source, the sliding rod, the sliding sleeve and the guide wheel can absolutely synchronously reciprocate linearly up and down relative to the base, ensuring that the two side door panels are opened or closed absolutely synchronously, and effectively ensuring the balance of the two side door panels when closing or opening the door panels; in practical applications, at least one set of shaft coupling drive mechanisms is provided with a guide wheel or a guide block to cooperate with the bracket guide groove, and guide wheels or guide blocks to cooperate with the bracket guide groove can also be provided in both sets of shaft coupling drive mechanisms.

[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 distance 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 it abuts against the rotation connection point between the driving arm and the pull rod when the above four points are just in the same straight line; if the power source is a driving motor, the limit block is adjusted by adjusting the adjusting bolt so that it abuts against the rotation connection point between the driving arm and the pull rod after the above four points just exceed the above straight line. Furthermore, sliding rollers are respectively installed on one side of the sliding brackets in the two groups of the coupling drive mechanisms, and the sliding rollers cooperate with the slide rails arranged on the base. The sliding rollers and slide rails are arranged to make the reciprocating linear motion of the coupling drive mechanisms on both sides smoother.

[0012] Preferably, the slide rail is a U-shaped slide rail.

[0013] Furthermore, if there are two sliding sleeves, the plug sliding door is a double plug sliding door, and the plug sliding door driving device 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 driving device can be a single plug sliding door driving device or a double plug sliding door driving device. The single plug sliding door driving device only needs to add a wire drawing, two wire drawing wheels and a sliding sleeve to become a double plug sliding door driving device.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] The present invention also provides a plug sliding door, comprising the above-mentioned plug sliding door driving device.

[0019] Working principle: When the plug door driving device is in use, when the driving end of the power source pulls or pushes at least one sliding sleeve, the sliding sleeve slides along the slide rod, and then the guide wheel moves 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 slide 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.

[0020] Beneficial effects: Compared with the prior art, the plug sliding door drive device has the following advantages:

[0021] (1) Since the power source in the Sierra door drive device 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 it 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. This means that 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.

[0022] (2) Due to the structural setting of the drive device of this Sierra door, 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 this Sierra door can be very stable when closing or opening.

[0023] (3) The plug door drive device is applied to the plug door. Since the guide wheel on the plug door can reciprocate 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 on the same straight line at this time. If the power source is a driving motor, the above four points just exceed the above straight line. In this way, when the door panel is closed, the pulling force or pushing force on the pull rod (when the driving source is a driving motor) can be released to achieve the self-locking effect of the door; 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 self-locking effect of the door, saving power, and being green and environmentally friendly.

[0024] (4) The plug sliding door drive device can be either a single plug sliding door drive device or a double plug sliding door drive device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the double-plug sliding door driving device when it is closed;

[0026] Figure 2 for Figure 1 A schematic diagram of the enlarged structure within the middle dotted circle S1;

[0027] Figure 3 for Figure 1 A schematic diagram of the enlarged structure within the middle dotted circle S2;

[0028] Figure 4 It is a schematic diagram of the overall structure of the double-sliding door driving device when it is opened;

[0029] Figure 5 for Figure 4 A schematic diagram of the enlarged structure within the middle dotted circle S1;

[0030] Figure 6 for Figure 4 A schematic diagram of the enlarged structure within the middle dotted circle S2;

[0031] Figure 7 It is a schematic diagram of the overall structure of the double-sliding door drive device when it is installed on the double-sliding door and closed;

[0032] Figure 8 for Figure 7 A schematic diagram of the enlarged structure within the middle dotted circle S1;

[0033] Fig. 9 for Figure 7 A schematic diagram of the enlarged structure within the middle dotted circle S2;

[0034] Fig.10 It is a top view of part of the structure when the double-plug sliding door driving device is closed;

[0035] Fig.11 for Fig.10 A partial structural diagram of

[0036] Fig.12 It is a top view of part of the structure when the double-sliding door driving device is opened;

[0037] Fig.13 for Fig.12 A partial structural diagram of

[0038] Fig.14 It is a top view of the coupling drive mechanism when the door panel is fully closed;

[0039] Fig.15 It is a top view of the coupling drive mechanism when the door panel is half-opened;

[0040] Fig.16 It is a top view of the coupling drive mechanism when the door panel is fully opened;

[0041] Fig.17 is a schematic diagram of the structure of the double-plug sliding door driving device when the power source is a driving motor and the device is closed;

[0042] Fig.18 for Fig.17 It is a schematic diagram of the enlarged structure within the middle dotted circle S1;

[0043] Fig.19 A schematic diagram of the structure of the double-plug sliding door driving device when the power source is a driving motor and the device is opened;

[0044] Among them, the base 1, the bracket guide groove 101, the guide groove 102, the roller guide groove 103, the shaft driving mechanism 2, the sliding bracket 201, the driving arm 202, the connecting arm 203, the limit block 204, the adjusting bolt 205, the sliding rod 3, the pull rod 4, the sliding sleeve 5, the wire drawing 6, the wire drawing wheel 7, the guide wheel 8, the driving cylinder 9, the door carrying frame 10, the door panel 11, the sliding roller 12, the slide rail 13, the guide wheel or the guide block 14, the driving motor 21, the screw 22, the screw nut 23, the emergency unlocking cylinder 24, the fixed connecting piece 25, and the unlocking spring 26. DETAILED DESCRIPTION

[0045] The present invention is described in detail below in conjunction with the accompanying drawings.

[0046] Implementation

[0047] This embodiment provides a plug sliding door driving device, such as Figures 1 to 6 As shown in 10 to 16, it mainly consists of a base 1, 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 and a door carrying frame 10.

[0048] 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.

[0049] 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.

[0050] 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, and the power source preferably uses a driving cylinder and a driving motor. If the power source is a driving cylinder 9, the driving cylinder 9 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.

[0051] The working principle of the plug sliding door driving device in this embodiment when applied to a double plug sliding door is as follows (eg Figures 7 to 9 ):

[0052] The base 1 is fixed to the door frame 20 of the double-sliding door, and the upper parts of the door panels 11 on both sides are fixed to the two sliding sleeves 5 through the door carrier 10. When the door panels 11 on both sides need to be closed, the sliding sleeve 5 on one side is pulled by the driving end of the driving cylinder 9, 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 will also exert 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 mechanism 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:

[0053] 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.

[0054] 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.

[0055] When the door panels 11 on both sides of the plug door driving device 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 opposite to the sliding sleeve 5, driving the pull rod 4 to push the two-side coupling drive mechanism 2 together with the slide rod 3 to move in a straight line away from the inside of the vehicle. The specific process is as follows:

[0056] 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.

[0057] Since the driving cylinder 9 in the plug door driving device 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 relative to or towards each other along the slide rod 3 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, so that 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, which 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 driving device, the coupling drive mechanisms 2 on both sides, the middle guide wheel 8, the sliding rod 3, the pulling 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.

[0058] Implementation

[0059] The present embodiment provides a single-plug sliding door drive device, which has roughly the same structure as the double-plug sliding door drive device in Embodiment 1. Only one sliding sleeve, wire drawing and two wire drawing wheels in the double-plug sliding door drive device need to be removed. The remaining structure and working principle are exactly the same and will not be elaborated here.

[0060] Implementation

[0061] 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 .

[0062] like Fig.17 and 18 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.

[0063] 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.

[0064] Apart from this, this embodiment is completely the same as Embodiment 1 and will not be described in detail here.

[0065] Implementation

[0066] This embodiment is a further improvement of the embodiment 3, and the main improvement is that in the plug sliding door assembly in the embodiment 3, 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.

[0067] Specifically, if Fig.19 As shown, the sliding 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.

[0068] 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.

[0069] Apart from this, this embodiment is exactly the same as Embodiment 3 and will not be described in detail here.

[0070] 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 plug door driving device, characterized in that: It comprises a base, and two ends of the base are respectively installed with a group of coupling drive mechanisms, 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 sliding sleeve is 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; 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 sets of the coupling drive mechanisms, the sliding bracket in at least one set 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 driving device 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 driving device according to claim 2, characterized in that: The support guide groove is a waist-shaped groove.

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

7. The plug door drive device according to any one of claims 1 to 6, characterized in that: 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.

8. The plug door drive device according to any one of claims 1 to 6, 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.

9. The plug door driving device according to claim 8, 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.

10. The plug door driving device according to any one of claims 1 to 6, characterized in that: The sliding rod and the pulling rod are parallel to each other.

11. The plug door driving device according to any one of claims 1 to 6, characterized in that: If there are two sliding sleeves, the plug sliding door is a double plug sliding door, and the plug sliding door driving device also includes a wire drawing and two wire drawing wheels respectively fixed on the two groups of the coupling driving 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.

12. A plug door, characterized in that: It comprises a plug door drive device as described in any one of claims 1 to 11.

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