Coupling drive device, plug sliding door drive device including the device, and plug sliding door

Abstract

The present invention relates to the field of driving mechanisms, and discloses a coupling drive device, a plug-type sliding door drive device and a plug-type sliding door including the device. In the coupling drive device, 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, 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-type sliding door is fixed on the pull rod, and its driving end is fixedly connected to one of the sliding sleeves; the coupling drive mechanism reciprocates relative to the base under the drive of the power source. The coupling drive device is applied to the plug-type sliding door, and can disperse the force originally concentrated on the guide wheel to the guide wheel and the coupling drive mechanisms on both sides of the guide wheel, so that the plug-type sliding door is very stable when opened or closed, effectively avoiding the phenomenon that the guide wheel automatically disengages from the guide groove, and can greatly reduce the damage of the guide wheel, save power, and be green and environmentally friendly.

Description

Technical Field

[0001] The present invention relates to the field of driving mechanisms, and in particular to a coupling driving device, a plug-sliding door driving device including the 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 coupling drive device, a Sierra door drive device and a Sierra door comprising the device. The coupling drive device is applied to the Sierra door, and can disperse the force originally concentrated on the guide wheel to the guide wheel and the coupling drive mechanism on both sides thereof. The door panels on both sides can ensure absolute synchronous opening or closing, so that the Sierra door is very stable when opening or closing, and the phenomenon of the guide wheel automatically disengaging from the guide groove is effectively avoided. It can also greatly reduce the damage of the guide wheel, save power, and be environmentally friendly.

[0006] Technical solution: The present invention provides a coupling drive device, including a base, wherein a group of coupling drive mechanisms including a sliding bracket, a driving arm and a connecting arm are respectively installed at both ends of the base, and one end of the driving arm in the two groups of the coupling drive mechanisms is rotatably connected through a pull rod; in each group of the coupling drive mechanisms, the other end of the driving arm is rotatably connected to the base, 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; the sliding bracket in at least one group of the coupling drive mechanisms is installed on the base through a guide mechanism, and can reciprocate relative to the base under the action of external force and the guide mechanism.

[0007] Furthermore, 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 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 setting of the guide wheel or the guide block and the bracket guide groove is to enable the coupling drive mechanism to realize reciprocating motion. In practical applications, at least one set of 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 coupling drive mechanisms; 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 guide wheel or the guide block and the bracket guide groove, and the pull rod will also reciprocate linearly up and down relative to the base.

[0008] Preferably, the support guide groove is a waist-shaped groove. The waist-shaped support guide groove enables the guide wheel on the sliding support to perform linear reciprocating motion along the support guide groove.

[0009] Preferably, one group of the coupling drive mechanisms also includes a limit block, which 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. When the coupling drive device is applied to the Sierra door, one end of the driving source is fixed on the pull rod and the other end is connected to the guide wheel. The guide wheel and the sliding bracket on one side of the coupling drive device are arranged to be able to reciprocate synchronously relative to the base. The setting of the limit block makes it possible for the door panel to close when the rotation connection point between the pull rod and the driving arm moves to the extreme position to one side, and the guide wheel is located in the guide groove. The limit block abuts 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, 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 abuts against one side of the rotation connection point between the driving arm and the pull rod. The four points can be kept in the same straight line by the pull rod, and even if the external force of the power source on the pull rod is released, the four points will not easily deviate from the straight line because they are located in the same straight line; in this way, the pulling force or pushing force on the pull rod can be released when the door panel is closed, or only a small pulling force or pushing force needs to be applied to the pull rod to ensure that the four points do not deviate from the same straight line, which can effectively prevent the guide wheel from slipping out of the guide groove, thereby achieving an effective self-locking effect of the door, saving power, and being green and environmentally friendly; if the power source used is a driving motor, the four points must exceed the straight line and then tilt slightly toward 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 between the driving arm and the pull rod, which can also achieve an effective self-locking effect of the door.

[0010] 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. When the device is applied to the Sierra door, 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 the limit block is 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 the limit block is against the rotation connection point between the driving arm and the pull rod. 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 the slide rails are arranged to make the reciprocating motion of the coupling drive mechanism smoother.

[0011] Preferably, the slide rail is a U-shaped slide rail.

[0012] The present invention also provides a plug sliding door driving device, comprising the above-mentioned coupling driving device.

[0013] The present invention also provides a plug sliding door, comprising the above-mentioned coupling drive device.

[0014] Working principle: In the coupling drive device of the present invention, when external force pulls or pushes the pull rod, the rotation connection point between the pull rod and the driving arm in the coupling drive mechanism on both sides moves away from or close to the rotation connection point between the connecting arm and the sliding bracket, and then 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 this time, the rotation connection point of the pull rod and the driving arm, the rotation connection point of the driving arm and the base, the rotation connection point of the driving arm and the connecting arm, and the rotation connection point of the connecting arm and the sliding bracket are all located on the same straight line. At this time, even if the external force on the pull rod is released, the above four points will not easily deviate from the straight line because they are located on the same straight line.

[0015] Beneficial effects: Compared with the prior art, the coupling drive device has the following advantages:

[0016] (1) When the coupling drive device is applied to a Sierra door, the power source of the Sierra door can be fixed on the pull rod, and the guide wheel on the Sierra door can be set to be able to reciprocate relative to the base in synchronization with the sliding bracket; while the power source pulls or pushes the guide wheel to close or open the door panel, the power source will also follow the coupling drive mechanisms on both sides to reciprocate relative to the base, so that when the power source pulls or pushes the guide wheel 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 guide wheel will not only be applied to the guide wheel, but will also be dispersed to the coupling drive mechanisms on both sides, which can greatly reduce the damage to the guide wheel, save power, and be environmentally friendly.

[0017] (2) The coupling drive mechanisms on both sides of the coupling drive device, the guide wheel in the middle, the pull rod and the power source can all reciprocate relative to the base at the same time, 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 coupling drive device can be very stable when closing or opening the door panel.

[0018] (3) When the coupling drive device is applied to a Sierra door, the guide wheel on the Sierra door is arranged to be able to reciprocate relative to the base in synchronization with the sliding bracket. When the door panel is closed under the action of the coupling drive device, 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 (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.

[0019] (4) The coupling drive device can be applied to both single-sliding doors and double-sliding doors. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the coupling drive device in a fully closed state;

[0021] Figure 2 for Figure 1 Schematic diagram of some structures;

[0022] Figure 3 It is a schematic diagram of the overall structure of the coupling drive device in a semi-open state;

[0023] Figure 4 for Figure 3 Schematic diagram of some structures;

[0024] Figure 5 It is a schematic diagram of the overall structure of the coupling drive device in a fully opened state;

[0025] Figure 6 for Figure 5 Schematic diagram of some structures;

[0026] Among them, the base 1, the bracket guide groove 101, 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 pull rod 4, the sliding roller 12, the slide rail 13, the guide wheel or the guide block 14. DETAILED DESCRIPTION

[0027] The present invention is described in detail below in conjunction with the accompanying drawings.

[0028] Implementation 1:

[0029] This embodiment provides a coupling drive device, such as Figures 1 to 6As shown, it is mainly composed of a base 1 and two sets of shaft-connecting drive mechanisms 2. The two sets of shaft-connecting drive mechanisms 2 are respectively installed at the two ends of the upper part of the base 1. The two sets of shaft-connecting drive mechanisms 2 are mainly composed of a sliding bracket 201, a driving arm 202 and a connecting arm 203. One end of the driving arm 202 in the two sets of shaft-connecting drive mechanisms 2 is rotatably connected through a pull rod 4. The sliding bracket 201 in at least one set of shaft-connecting drive mechanisms 2 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 the waist-shaped bracket guide groove 101 opened on the base 1; under the external force drive and the guiding action of the bracket guide groove 101, the guide wheel or the guide block 14 can reciprocate linearly 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. One set of shaft coupling drive mechanisms 2 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.

[0030] 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; 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.

[0031] The above-mentioned coupling drive device can be installed on the plug sliding door to control the closing or opening of the plug sliding door. It only needs to fix the base 1 of the device to the door frame of the plug sliding door and set the guide wheel of the plug sliding door to be able to reciprocate linearly synchronously with the sliding bracket in the coupling drive device. Figure 5 As shown, when the plug door needs to be closed, the guide wheel of the plug door is exerted with a driving cylinder or a driving motor fixed on the pull rod (the following description is described by taking the driving cylinder as an example, and the telescopic rod of the driving cylinder is connected to the guide wheel of the plug door) Figure 3The external force in the direction indicated by the middle arrow pulls the guide wheel to move in the direction indicated by the arrow. Since the driving cylinder is fixed on the pull rod, while the driving cylinder has a pulling force in the direction of the arrow on the guide wheel, the driving cylinder also has a thrust in the opposite direction of the arrow on the pull rod, causing the rotation connection point between the pull rod 4 and the driving arm 202 to approach the rotation connection point between the connecting arm 203 and the sliding bracket 201, and then 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 to move straight down along the bracket guide groove 101 on the base 1, as shown in FIG. Figure 3 shown.

[0032] When the rotation connection point between the driving arm 202 and the pull rod 4 rotates to the limit position in the opposite direction indicated by the arrow, the limit block 204 just abuts against one side of the rotation connection point between the driving arm 202 and the pull rod 4. At this time, the sliding bracket 201 moves straight down along the bracket guide groove 101 to the limit position of the bracket guide groove 101 ( Figure 1 As shown in the lower end, the four points of the rotation connection between the pull rod 4 and the driving arm 202, the rotation connection between the driving arm 202 and the base 1, the rotation connection between the driving arm 202 and the connecting arm 203, and the rotation connection between the connecting arm 203 and the sliding bracket 201 are all located on the same straight line. Figure 1 At this time, the device is in a self-locking state, that is, the plug sliding door is in a self-locking state when it is closed, and the guide wheel of the plug sliding door is located in the guide groove. Even if the external force 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, that is, the plug sliding door will not easily open automatically due to bumps.

[0033] When you want to open the plug door, you push the guide wheel in the opposite direction of the arrow through external force, and then drive the cylinder to move along Figure 2 Pull the pull rod 4 in the same direction as the arrow, and the rotation connection point between the pull rod 4 and the driving arm 202 moves 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 to move up along the bracket guide groove 101 on the base 1. When the rotation connection point between the pull rod 4 and the driving arm 202 moves to the other side to the limit position, that is, the sliding bracket 201 moves up along the bracket guide groove 101 to the limit position of the bracket guide groove 101 ( Figure 5 When the plug door is fully opened, the stopper 204 and the drive arm 202 are not in contact with each other. Figure 5 shown.

[0034] Implementation 2:

[0035] This embodiment is basically the same as embodiment 1, with the only difference being that when the coupling drive device in embodiment 1 is applied to the Sierra door, a driving cylinder is used to apply external force, while when the coupling drive device in this embodiment is applied to the Sierra door, a driving motor is used to apply external force (the driving motor is fixed on the pull rod, a screw is connected to its output shaft, and the screw nut on the screw is connected to the guide wheel of the Sierra door).

[0036] Different from implementation mode 1, when a driving motor is used to apply external force, when the sliding bracket 201 moves straight down along the bracket guide groove 101 to the extreme position of the bracket guide groove 101, 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 must exceed the above-mentioned same straight line for the driving motor to achieve a self-locking effect. That is, when this device is used on a Sierra door and a driving motor is used as the power source of the Sierra door, the above-mentioned four points are not located in the same straight line when the door panel 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.

[0037] Apart from this, this embodiment is completely the same as Embodiment 1 and will not be described in detail here.

[0038] 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 coupling drive device, characterized in that: It comprises a base, and a group of shaft-connecting driving mechanisms including a sliding bracket, a driving arm and a connecting arm are respectively installed at both ends of the base, and one end of the driving arm in the two groups of shaft-connecting driving mechanisms is rotatably connected through a pull rod; in each group of shaft-connecting driving mechanisms, the other end of the driving arm is rotatably connected to the base, 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; the sliding bracket in at least one group of shaft-connecting driving mechanisms is installed on the base through a guide mechanism, and can reciprocate relative to the base under the action of an external force and the guide mechanism; One of the sets of the coupling drive mechanisms further includes a limit block fixed on the base, and the limit block and the pull rod are respectively located on two sides of the drive 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; 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 on the same straight line.

2. The shaft coupling drive 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 driving of external force and the guiding action of the bracket guide groove, the guide wheel or guide block can reciprocate in the bracket guide groove.

3. The shaft coupling drive device according to claim 2, characterized in that: The support guide groove is a waist-shaped groove.

4. The coupling drive device according to claim 1, characterized in that: 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 shaft coupling drive device according to claim 4, characterized in that: The limit block is fixedly connected to the base through an adjusting bolt.

6. The shaft coupling drive device according to any one of claims 1 to 5, characterized in that: 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.

7. The shaft coupling drive device according to claim 6, characterized in that: The slide rail is a U-shaped slide rail.

8. A plug door driving device, characterized in that: The invention comprises a coupling drive device as claimed in any one of claims 1 to 7.

9. A plug door, characterized in that: The invention comprises a coupling drive device as claimed in any one of claims 1 to 7.

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