A sliding plug door and its driving mechanism and emergency unlocking device

Abstract

The utility model relates to passenger door technical field of vehicle, specifically relates to a plug door and drive mechanism, emergency unlocking device thereof. Plug door emergency unlocking device includes energy accumulator and pull wire, and one end of pull wire is used for transmission connection with the opening and closing drive system of plug door, and the other end is transmission connection with the pull rod output end of energy accumulator, so as to make the opening and closing drive system unlock through the pull rod pulling pull wire when energy accumulator releases, and the output end of pull rod is equipped with one-way transmission structure, and one-way transmission structure includes the fixed connection of the connecting sleeve pipe of pull rod, and the end head fixed with pull wire corresponding end is installed in the connecting sleeve pipe, and the end head fixed with pull wire corresponding end and connecting sleeve pipe are one-way transmission cooperation in the direction of pulling pull wire to pull pull wire when energy accumulator releases and make connecting sleeve pipe relatively pull wire and end head active when energy accumulator energy storage resets, and the pull wire cannot be pushed to bend, avoid pull wire damaging due to bending, improve use reliability.

Description

Technical Field

[0001] This utility model relates to the field of passenger door technology for vehicles, specifically to a sliding door and its drive mechanism and emergency unlocking device. Background Technology

[0002] Sliding doors offer advantages such as good sealing, minimal space occupation, and an aesthetically pleasing overall appearance, making them widely used in bus doors, subway doors, and high-speed rail doors. The basic structure of a sliding door can be found in a sliding door mechanism disclosed in Chinese invention patent CN107989521B. This mechanism utilizes a drive motor in conjunction with a linkage mechanism and a lead screw and nut mechanism to drive the opening and closing of the sliding door, and leverages the dead-point principle of the linkage mechanism to achieve a passive locking function when the door is fully closed.

[0003] To handle emergencies, the sliding doors are also equipped with an emergency unlocking device. In special circumstances such as vehicle fire, submersion in water, or collision, where power fails, the emergency unlocking device can be used to open the door, allowing occupants to evacuate quickly and ensuring their safety. The emergency unlocking device consists of an accumulator and a steel cable. The accumulator includes a spring pre-compressed and a lever fixed to the cable. When the emergency unlocking device is activated, the spring releases its force, generating tension on the cable via the lever. The cable pulls a linkage mechanism, causing the linkage to swing past its dead center, thus unlocking the door. Then, personnel can manually push the sliding door open. When the emergency unlocking device needs to be reset, the accumulator stores energy, causing the spring to recompress and simultaneously moving the lever. The lever then exerts a thrust on the cable. Because the cable is flexible, it may bend under the pushing force; excessive bending can easily damage the cable. Utility Model Content

[0004] The purpose of this utility model is to provide an emergency unlocking device for sliding doors, so as to solve the problem that the pull wire of the current emergency unlocking device for sliding doors is easily damaged by bending during reset; the purpose of this utility model is also to provide a sliding door and its driving mechanism to solve the above problems.

[0005] The technical solution of this utility model's emergency unlocking device for sliding doors is as follows:

[0006] An emergency unlocking device for a sliding door includes an accumulator and a pull cable. One end of the pull cable is connected to the opening and closing drive system of the sliding door, and the other end is connected to the output end of the pull rod of the accumulator. When the accumulator is released, the pull rod pulls the pull cable to unlock the opening and closing drive system. The output end of the pull rod is provided with a one-way transmission structure, which includes a connecting sleeve fixedly connected to the pull rod. The corresponding fixed end of the pull cable is installed in the connecting sleeve. The connecting sleeve and the corresponding fixed end of the pull cable are engaged in a one-way transmission in the direction of pulling the pull cable so that the pull cable is pulled when the accumulator is released, and the connecting sleeve moves relative to the pull cable and the end when the accumulator is recharged.

[0007] Furthermore, the one-way drive structure includes an outer sleeve for fixing to a connecting seat fixed to the vehicle body of the opening and closing drive system, with the connecting sleeve inserted inside the outer sleeve.

[0008] Furthermore, the outer sleeve includes a main body and a reduced diameter structure located at one end of the main body for the pull wire to pass through, and the other end of the main body is provided with a port for the connecting sleeve to pass through.

[0009] Furthermore, a sealing ring is provided at the end of the outer sleeve into which the connecting sleeve is inserted, and the sealing ring is in a sealing fit with the outer circumferential surface of the connecting sleeve.

[0010] Furthermore, the outer sheath of the pull wire is fixedly connected to the outer sleeve.

[0011] Furthermore, the accumulator includes a cylinder and a spring. The cylinder includes a cylinder body and a piston located inside the cylinder body. A pull rod is connected to one end of the piston, and the other end of the piston is connected to a accumulator rod. A stop is provided at one end of the accumulator rod that extends out of the cylinder body, and the spring is installed between the stop and the cylinder body.

[0012] Furthermore, the unidirectional transmission structure also includes a connector, one end of which is connected to the connecting sleeve for anti-rotation, and the other end is threaded to the tie rod.

[0013] Furthermore, the connecting sleeve has an inner ring platform at one end of the pull cable, through which the pull cable adapts. The inner ring platform is located on the side of the corresponding end away from the pull rod to form a stop engagement with the end when the pull cable is pulled.

[0014] Beneficial effects: This utility model improves the emergency unlocking device for sliding doors. A one-way transmission structure is set between the pull cable and the pull rod to form a movable connection. When emergency unlocking is required, the accumulator releases and drives the pull rod to move. The connecting sleeve and the corresponding end fixed to the pull cable engage in one-way transmission in the direction of pulling the pull cable, generating a pulling force on the pull cable. This causes the pull cable to drive the opening and closing drive system to unlock. When the accumulator resets and stores energy, the pull rod moves and resets. The connecting sleeve can move relative to the pull cable and the end. The inner cavity of the connecting sleeve provides space for relative movement, preventing the pull cable from bending and avoiding damage to the pull cable due to bending, thus improving the reliability of use.

[0015] The technical solution of the sliding door drive mechanism of this utility model is as follows:

[0016] The sliding door drive mechanism includes an opening and closing drive system for realizing the opening and closing of the sliding door and a sliding door emergency unlocking device. For the structure and beneficial effects of the sliding door emergency unlocking device, please refer to the above-mentioned technical solution of the sliding door emergency unlocking device.

[0017] The technical solution of this utility model's sliding door is:

[0018] The sliding door includes a door body and a drive mechanism for driving the door body. The drive mechanism includes an opening and closing drive system and a sliding door emergency unlocking device. For the structure and beneficial effects of the sliding door emergency unlocking device, please refer to the above-mentioned technical solution for the sliding door emergency unlocking device. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of one embodiment of a sliding door;

[0020] Figure 2 yes Figure 1 A perspective structural diagram of the sliding door drive mechanism in the image;

[0021] Figure 3 yes Figure 2 A schematic diagram of the connecting seat in the middle;

[0022] Figure 4 yes Figure 2 A schematic diagram of the structure of the door module in the middle;

[0023] Figure 5 yes Figure 2 A schematic diagram of the driver module in the diagram;

[0024] Figure 6 yes Figure 1 A schematic diagram of the sliding door drive mechanism from a lower view.

[0025] Figure 7 yes Figure 6 A schematic diagram of the emergency unlocking device in the diagram;

[0026] Figure 8 yes Figure 7 A cross-sectional schematic diagram of the structure in which the pull wire assembly and the one-way transmission structure work together.

[0027] In the diagram: 1. Connecting seat; 101. Flanged edge; 102. Connecting hole; 103. Front hinge seat; 104. Rear hinge seat; 105. Track plate; 106. Stop block; 107. Track hole; 108. Limit switch; 2. Door body; 3. Drive module; 301. Lead screw seat; 302. Front module connecting rod; 303. Rear module connecting rod; 304. Lead screw; 305. Power unit; 306. Nut; 307. Synchronous belt; 4. Door carrying module; 401. Guide frame; 402. Moving seat; 403. 1. Portal frame; 404. Roller; 405. Ball joint assembly; 406. Guide rod; 407. Guide wheel; 5. Portal hinge; 501. Crank arm; 502. Auxiliary rod; 503. Transmission rod; 6. Locking linkage; 7. Accumulator; 71. Pull rod; 72. Cylinder; 73. Energy storage spring; 74. Spacer ring; 8. One-way transmission structure; 81. Connecting sleeve; 82. Outer sleeve; 83. Connector; 9. Pull cable assembly; 91. Pull cable; 92. Pull cable sheath; 93. Pull cable end; 94. Sheath connector. Detailed Implementation

[0028] The basic concept of this utility model's emergency unlocking device for sliding doors is to set up a one-way transmission structure between the pull cable and the pull rod to form a movable connection. When the accumulator is resetting and storing energy, it will not push the pull cable to bend, thus avoiding damage to the pull cable due to bending and improving the reliability of use.

[0029] The present invention will be described in detail below with reference to specific embodiments.

[0030] An embodiment of the sliding door of this utility model:

[0031] To facilitate understanding, let's first combine... Figure 1-5 The main structure and working process of the sliding door in this embodiment are described. The sliding door includes a door body 2 and a drive mechanism for driving the door body 2. The sliding door drive mechanism includes an opening and closing drive system, which includes a connecting seat 1 for fixing to the side of the vehicle body. The connecting seat 1 adopts a frame structure. The front and rear ends of the connecting seat 1 are respectively provided with flanges 101, and the flanges 101 are provided with connecting holes 102 for fasteners to fix and connect. The front and rear ends of the connecting seat 1 are respectively provided with a front hinge seat 103 and a rear hinge seat 104. Both hinge seats are cantilever structures. The front hinge seat 103 extends rearward, and the rear hinge seat 104 extends forward for connecting the drive module 3.

[0032] The main components of the sliding door opening and closing drive system are the door-carrying module 4 and the drive module 3. The door-carrying module 4 is used to "carry" the door body 2, and connects to the door body 2 during use and limits the movement path of the door body 2. The drive module 3 is used to provide power for the door body 2 when it moves and transmits the power to the door body 2.

[0033] The door-carrying module 4 includes a guide frame 401 and a movable seat 402 mounted on the guide frame 401. The movable seat 402 has a door-carrying bracket 403 for fixed connection to the door body 2, allowing the door body 2 to move directly via the movable seat 402. The sliding door is used as the front door of the vehicle and is a single-leaf sliding door. The front end of the guide frame 401 is hinged to the front end of the connecting seat 1, allowing its rear end to swing in the left-right direction; that is, the rear end of the guide frame 401 forms a swing end. When the guide frame 401 and the connecting seat 1 are parallel in the front-rear direction, the door is closed, and the door body 2 is flush with the side of the vehicle body. When the swing end of the guide frame 401 swings outwards, the rear end of the door body 2 tilts outwards, increasing the distance between it and the outer side of the vehicle body, creating a tilted posture. Moving the door body 2 backwards at this time further increases the distance between its rear end and the outer side of the vehicle body. To prevent unwanted swaying during the movement of the movable seat 402 and to limit the opening and closing trajectory, a track plate 105 is fixedly installed on the connecting seat 1. The track plate 105 can limit the movement trajectory of the movable seat 402 to a left-right inclined trajectory. When the movable seat 402 moves, it can only move along the inclined trajectory set by the track plate 105.

[0034] When the door opens, the rear end of the door 2 must first swing outwards from the vehicle body. To achieve this, the drive module 3 should have the function of driving the guide frame 401 to swing before the movable seat 402 moves (when the door opens). Based on the above requirements, such as Figure 5 As shown, the drive module 3 includes a lead screw seat 301, which adopts a "beam + shaft seat structure". The two ends of the lead screw seat 301 are connected to the connecting seat 1 through the module connecting rod to form an asymmetrical quadrilateral, so that the movement of the lead screw seat 301 relative to the connecting seat 1 is a composite motion combining oscillation in the left and right direction and translation in the front and back direction. Here, the module link located at the front end of the lead screw seat 301 is defined as the front module link 302, and the module link located at the rear end of the lead screw seat 301 is defined as the rear module link 303. The front module link 302 is connected to the front hinge seat 103 on the connecting seat 1, and the rear module link 303 is connected to the rear hinge seat 104 on the connecting seat 1. The four sides of the aforementioned asymmetrical quadrilateral are formed by the lines connecting the lead screw seat 301, the front module link 302, the rear module link 303, and the front hinge seat 103 and the rear hinge seat 104, respectively. The compound motion of the lead screw seat 301 relative to the connecting seat 1 can be achieved by matching the length of the lead screw seat 301, the length of the front module link 302, and the length of the rear module link 303, which will not be elaborated here.

[0035] A lead screw 304 and its power unit 305 are mounted on the lead screw seat 301. A nut 306 is mounted on the lead screw 304. The lead screw 304 and nut 306 together constitute the lead screw 304-nut 306 mechanism. When the two rotate relative to each other, one of them will inevitably undergo axial movement. At the closed position of the sliding door, there is a set angle between the lead screw 304 and the inclined track. If the power unit 305 drives the lead screw 304 to rotate at this time, the nut 306 cannot move in the back-and-forth direction due to the restriction of the track plate 105. Therefore, the lead screw 304 will move forward and drive the lead screw seat 301 to move synchronously. The lead screw seat 301 then swings under the action of the aforementioned asymmetrical quadrilateral and drives the guide frame 401 to swing. Due to the action of the module connecting rod, it will swing in the back-and-forth direction. The movement is simultaneously transmitted to the movable seat 402 and the guide frame 401 via the nut 306. Therefore, the rear end of the guide frame 401 will also swing until the lead screw 304 is parallel to the inclined trajectory defined by the track plate 105. At this point, the lead screw 304 is stopped, and the nut 306 will move backward under the action of the lead screw 304, driving the movable seat 402 and the door body 2 to move backward, thus realizing the door opening action. During this process, to ensure that the lead screw 304 can stably stay at its limit position, a stop block 106 can be provided on the connecting seat 1 to stop it. When it is necessary to close the door, the lead screw 304 can be rotated in the opposite direction.

[0036] A long strip-shaped limiting hole is provided on the connecting seat 1 at the swing end of the guide frame 401. A roller 404 that cooperates with the long strip-shaped limiting hole is provided at the swing end of the guide frame 401. The swing end of the guide frame 401 cooperates with the connecting seat 1 through the roller 404. The cooperation of the roller 404 reduces the resistance when the guide frame 401 swings, which can prevent jamming.

[0037] The guide frame 401 and the connecting seat 1 are hinged together by a ball joint assembly 405, such as Figure 4 As shown, the ball joint assembly 405 includes a cylindrical ball seat and a ball head disposed in the ball seat. The ball seat is fixedly connected to the connecting seat 1, and the ball head is connected to the guide frame 401. The guide frame 401 includes at least two parallel guide rods 406. The adjacent ends of each guide rod 406 are connected by an end frame, and the guide frame 401 is hinged to the connecting seat 1 through the end frame at the corresponding end. The swing end of the guide rod 406 passes through the end frame at that end, and the roller 404 of the swing end of the guide frame 401 is directly mounted on the part of the guide rod 406 that protrudes from the end frame. The movable seat 402 is sleeved on the corresponding guide rod 406 through the guide sleeve provided thereon, thereby guiding and engaging with the guide rod 406.

[0038] A track hole 107 is provided on the track plate 105, and a guide head extending into the track hole 107 is provided on the movable seat 402. The movement trajectory of the movable seat 402 is limited to the inclined trajectory by the cooperation of the track hole 107 and the guide head. A guide wheel 407 is provided on the guide head, and the guide head cooperates with the track hole 107 through the guide wheel 407.

[0039] The power unit 305 is specifically an electric motor, and the power unit 305 and the lead screw 304 are connected by a synchronous belt 307. The connecting seat 1 is equipped with a limit switch 108 that cooperates with the lead screw seat 301. When the sliding door is closed to the end, the limit switch 108 is triggered by the lead screw seat 301 to shut off the power unit 305. The lead screw seat 301 can trigger the limit switch 108 through the module connecting rod 303 behind it.

[0040] A door hinge 5 is provided at one end of the connecting seat 1 near the swing end of the guide frame 401. A crank arm 501 is provided on the door hinge 5. The structure of the door hinge 5 and how it drives the door body 2 through forward and reverse rotation are existing technologies in the field, as detailed in the applicant's patent specification with authorization announcement number CN218815877U, and will not be elaborated here. Unlike the prior art, in the sliding door drive mechanism of this utility model, as... Figure 1 , Figure 3 As shown, the crank arm 501 forms a four-bar linkage via an auxiliary rod 502 mounted on the connecting seat 1. This four-bar linkage is connected to the swing end of the guide frame 401 via a transmission rod 503. The swinging of the guide frame 401 drives the door hinge 5 to reciprocate. Compared to the prior art where the corresponding slider is directly connected to the crank arm 501 on the door hinge 5 via a connecting rod, this invention converts the crank arm 501 into one link of the four-bar linkage by configuring an auxiliary rod 502. This allows for the driving of the door hinge 5 through a shorter transmission rod 503.

[0041] To ensure the sliding door is locked when closed, a locking link 6 is provided between the rear module link 303 and the swing end of the guide frame 401 to lock the sliding door in the closed state. The locking link 6 can lock the sliding door using the dead point principle of the linkage mechanism. The principle is a known technology and will not be described in detail here.

[0042] Considering that the sliding door should be able to be opened in case of emergencies, the lead screw 304 and nut 306 are mutually controlling components. When the lead screw 304 rotates, it drives the nut 306 to move axially, and when the nut 306 moves, it drives the lead screw 304 to rotate. When the opening and closing drive system unlocks, that is, when the locking link 6 of the linkage mechanism swings past its dead point, causing the guide frame 401 to swing parallel to the tilt trajectory, the door 2 can be pushed open manually.

[0043] To enable the guide frame 401 to swing from its position when the sliding door is closed to a position parallel to its tilt trajectory, thereby unlocking, the sliding door drive mechanism also includes a sliding door emergency unlocking device mounted on the connecting seat 1. Combined with... Figure 6 , Figure 7 , Figure 8 The emergency unlocking device for the sliding door includes an accumulator 7 and a pull cable assembly 9. The pull cable assembly 9 includes a pull cable 91, which can be made of steel wire rope. Both ends of the pull cable 91 are fixed for connection with corresponding components. The two ends of the pull cable 91 are defined as a mechanism connection end and a force transmission connection end, respectively. The mechanism connection end of the pull cable 91 is used for transmission connection with the front module connecting rod 302 or lead screw seat of the sliding door's opening and closing drive system, and the force transmission connection end is connected to the output end of the pull rod 71 of the accumulator 7. When the accumulator 7 releases energy, the pull cable 91 is pulled by the pull rod 71, which can pull the guide frame 401 to a position parallel to the tilt trajectory, thereby unlocking the opening and closing drive system.

[0044] To prevent the flexible pull wire 91 from bending and being damaged when the accumulator 7 resets, the output end of the pull rod 71 is equipped with a one-way transmission structure 8. The one-way transmission structure 8 includes a connecting sleeve 81. The pull wire end 93, with its force transmission connection fixed, is installed inside the connecting sleeve 81. The connecting sleeve 81 and the pull wire end 93 are in a one-way transmission engagement in the direction of pulling the pull wire 91, so that when the accumulator 7 releases, the pull rod 71 pulls the pull wire 91, and when the accumulator 7 stores energy and resets, the connecting sleeve 81 moves relative to the pull wire 91 and the pull wire end 93. One end of the connecting sleeve 81 used for pulling the pull wire end 93 has an inner ring platform. The inner diameter of the inner ring platform is smaller than the inner diameter of the main body of the connecting sleeve. The pull wire adapts to pass through the inner ring platform. The inner ring platform is located on the side of the end away from the pull rod to form a stop engagement with the pull wire end when pulling the pull wire.

[0045] When emergency unlocking is required, the accumulator 7 releases and drives the pull rod 71 to move. The end of the connecting sleeve 81 and the corresponding end of the pull cable 91 are fixed in a one-way transmission cooperation in the direction of pulling the pull cable 91, generating a pulling force on the pull cable 91, so that the pull cable 91 drives the opening and closing drive system to unlock. When the accumulator 7 resets and stores energy, the pull rod 71 moves and resets. The connecting sleeve 81 can move relative to the pull cable 91 and the end. The inner cavity of the connecting sleeve 81 provides space for relative movement, which will not push the pull cable 91 to bend, avoid damage to the pull cable 91 due to bending, and improve the reliability of use.

[0046] The reset of the pull cable 91 can be achieved by the closing action of the plug door, or by the swing of the front module connecting rod 302 of the opening and closing drive system or the screw seat pulling the mechanism connection end of the pull cable 91, thus maintaining the pull end 93 of the force transmission connection end of the pull cable 91 in a one-way stop fit with the inner wall of the connecting sleeve 81.

[0047] The accumulator 7 includes a cylinder and a spring, namely the energy storage spring 73. The cylinder includes a cylinder body 72 and a piston located inside the cylinder body 72. A pull rod 71 is connected to one end of the piston, and the other end of the piston is connected to a accumulator rod. The pull rod 71 and the accumulator rod pass through the cylinder body 72 to form a sliding seal. The inner cavity of the cylinder body 72 has air passage interfaces on both sides of the piston axis for connecting air passages. A stop is provided at the end of the accumulator rod that protrudes from the cylinder body 72. The energy storage spring 73 is installed between the stop and the cylinder body 72. The energy storage spring 73 is a compression spring and is sleeved on the accumulator rod. When the accumulator 7 is accumulating energy, the cavity where the accumulator rod is located in the cylinder body 72 is inflated. The accumulator rod retracts, the pull rod 71 extends, and the stop at the end of the accumulator rod moves toward the cylinder body 72, thereby compressing the energy storage spring 73 and realizing energy storage. When the door is in the locked state, the cable end 93 is engaged with the stop wall inside the connecting sleeve 81. When the accumulator 7 is released, the air circuit can be opened via the emergency button inside the vehicle, depressurizing the chamber containing the accumulator rod in the cylinder. The accumulator spring 73 releases its elasticity, pulling the accumulator rod, piston, and pull rod 71 to move. The pull rod 71, through the connecting sleeve 81, generates a pulling force on the pull cable 91, thereby driving the opening and closing drive system to unlock the door. At this time, personnel only need to gently push the door outward to open it, enabling evacuation from inside the vehicle to the outside.

[0048] The one-way transmission structure 8 also includes a fixed outer sleeve 82, which is fixed to the connecting seat 1 by a fixed bracket. The connecting sleeve 81 is inserted inside the outer sleeve 82, and the movement of the outer sleeve 82 and connecting sleeve 81 can be used for guidance, which is beneficial to reliable use. In other embodiments, the connecting sleeve may not be provided, and its position may be maintained solely by the limiting connection between the connecting sleeve and the pull rod.

[0049] The outer sleeve 82 has a reduced-diameter structure at one end for the pull wire 91 to pass through, and an opening at the other end for the connecting sleeve 81 to enter. The outer and inner diameters of the reduced-diameter structure of the outer sleeve 82 are both smaller than the outer and inner diameters of the main body. The inner diameter of the main body is adapted to the outer diameter of the connecting sleeve 81. A baffle wall is formed inside the reduced-diameter structure within the outer sleeve 82, located at the junction of the reduced-diameter structure and the main body. The connecting sleeve 81 is inserted from the opening at the end of the outer sleeve 82 furthest from the reduced-diameter structure. The baffle wall limits the insertion of the connecting sleeve 81, and the inner wall of the reduced-diameter structure guides the movement of the pull wire 91. In other embodiments, the outer sleeve can also be a tube of uniform diameter with the same dimensions throughout.

[0050] The inner wall of the end of the outer sleeve 82 into which the connecting sleeve 81 passes is provided with a sealing ring. The sealing ring slides and seals with the outer circumferential surface of the connecting sleeve 81, which can protect the connection between the pull wire 91 and the connecting sleeve 81 and improve reliability. In other embodiments, the sealing ring may not be provided.

[0051] The pull cable assembly 9 includes a pull cable sheath 92 that covers the pull cable 91. The sheath is shorter than the pull cable 91 so that both ends of the pull cable 91 extend beyond the sheath. One end of the sheath is fixedly connected to the outer sleeve 82, which helps stabilize the sheath. The end of the pull cable sheath 92 extends into the inner hole of the reduced-diameter structure of the outer sleeve 82. The pull cable assembly 9 also includes a sheath connector 94, which is fitted over and fixed to the reduced-diameter structure of the sheath and the outer sleeve 82. In other embodiments, the pull cable sheath may be omitted.

[0052] The connecting sleeve 81 and the pull rod 71 are separate components. The pull rod 71 can indirectly apply force to the pull wire 91 through the connecting sleeve 81. The one-way transmission structure 8 also includes a connector 83. One end of the connector 83 is connected to the connecting sleeve 81 for anti-rotation, and the other end is threaded to the pull rod 71. The anti-rotation connection can be achieved by a pin. The ends of the connector 83 and the pull rod 71 are provided with hexagonal structures for easy screwing, facilitating assembly and disassembly. In other embodiments, the pull rod and the connecting sleeve can also be an integral structure.

[0053] Two or more energy storage springs 73 are provided along the extension direction of the energy storage rod. In this embodiment, two are provided. A spacer ring 74 is provided between each spring. The spacer ring 74 is sleeved on the energy storage rod, and the spring abuts against the spacer ring 74. The cylinder body 72 is fixed to the connecting seat 1 by a bracket. The spring is compressed by the relative movement of the energy storage rod and the rod body. Energy is stored by utilizing the deformation of different energy storage springs 73, which is beneficial to improving the service life of the spring. In other embodiments, only one energy storage spring can be provided to ensure that the force required during release is met.

[0054] An embodiment of the sliding door drive mechanism of this utility model:

[0055] The sliding door drive mechanism in this embodiment is the same as the sliding door drive mechanism in the above-described sliding door embodiment, and will not be described again here.

[0056] Embodiments of the emergency unlocking device for sliding doors of this utility model:

[0057] The emergency unlocking device for the sliding door in this embodiment is the same as the emergency unlocking device for the sliding door in the above embodiment, and will not be described again here.

[0058] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An emergency unlocking device for a sliding door, comprising an accumulator and a pull cable, one end of the pull cable being connected to the opening and closing drive system of the sliding door, and the other end being connected to the pull rod output end of the accumulator, so that the opening and closing drive system is unlocked by pulling the pull cable through the pull rod when the accumulator is released, characterized in that, The output end of the pull rod is equipped with a one-way transmission structure. The one-way transmission structure includes a connecting sleeve that is fixedly connected to the pull rod. The end of the pull line that is fixed at the corresponding end is installed in the connecting sleeve. The connecting sleeve and the end of the pull line that is fixed at the corresponding end cooperate in a one-way transmission in the direction of pulling the pull line so that the pull line is pulled when the accumulator is released and the connecting sleeve moves relative to the pull line and the end when the accumulator is recharged.

2. The emergency unlocking device for a sliding door according to claim 1, characterized in that, The one-way drive structure includes an outer sleeve for fixing to a connecting seat fixed to the vehicle body of the opening and closing drive system, with the connecting sleeve inserted inside the outer sleeve.

3. The emergency unlocking device for a sliding door according to claim 2, characterized in that, The outer sleeve includes a main body and a reduced diameter structure located at one end of the main body for the pull wire to pass through, and the other end of the main body is provided with a port for the connecting sleeve to pass through.

4. The emergency unlocking device for a sliding door according to claim 3, characterized in that, The outer sleeve has a sealing ring at one end into which the connecting sleeve passes, and the sealing ring is in a sealing fit with the outer circumferential surface of the connecting sleeve.

5. The emergency unlocking device for a sliding door according to claim 2, 3, or 4, characterized in that, The outer sheath of the pull cable is fixedly connected to the outer tube.

6. The emergency unlocking device for a sliding door according to any one of claims 1-4, characterized in that, The accumulator includes a cylinder and a spring. The cylinder includes a cylinder body and a piston located inside the cylinder body. A connecting rod is connected to one end of the piston, and a accumulator rod is connected to the other end of the piston. A stop is provided at one end of the accumulator rod that extends out of the cylinder body, and a spring is installed between the stop and the cylinder body.

7. The emergency unlocking device for a sliding door according to claim 6, characterized in that, The unidirectional transmission structure also includes a connector, one end of which is connected to the connecting sleeve for anti-rotation, and the other end is threaded to the tie rod.

8. The emergency unlocking device for a sliding door according to any one of claims 1-4, characterized in that, The connecting sleeve has an inner ring platform at one end of the pull cable. The pull cable adapter passes through the inner ring platform, which is located on the side of the corresponding end away from the pull rod to form a stop engagement with the end when the pull cable is pulled.

9. A sliding door drive mechanism, characterized in that, It includes an opening and closing drive system for realizing the opening and closing of a sliding door and an emergency unlocking device for a sliding door according to any one of claims 1-8.

10. A sliding door, characterized in that, It includes a door body and a drive mechanism for driving the door body to move. The drive mechanism includes an opening and closing drive system and an emergency unlocking device for a sliding door according to any one of claims 1-8.

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