A double-leaf sliding door system

Abstract

The application discloses a double-leaf sliding door system, which comprises a bearing driving mechanism, a door leaf, a lower swing guiding device, a vertical synchronous rod assembly and a middle constraint lock hook, and the door leaf, the lower swing guiding device, the vertical synchronous rod assembly and the middle constraint lock hook are symmetrically arranged about the center of the door system. End constraint devices on the bearing driving mechanism realize constraint on the two ends of a cross beam, combined with a middle nut assembly over-passing dead point locking device, a multi-point constraint device of the cross beam assembly of the cross beam is constructed; a rotating arm on the vertical synchronous rod assembly reliably constrains the upper part of a backstop of the door leaf; the vertical synchronous rod assembly drives the lower swing guiding device to realize X and Y direction locking of the lower part of the backstop of the door leaf, and the lower part of the door leaf can be inserted at an angle of about 35 degrees, and a blocking pin can form constraint on the lower part of a front stop of the door leaf; combined with the mutual coupling effect of the backstop middle constraint lock hook and a lock catch, a reliable multi-point constraint system of the door system is constructed, the door system has high bearing strength, and the door system has good static and dynamic sealing performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rail vehicle door, in particular to a double-sliding plug door system. BACKGROUND

[0002] In recent years, with the increase of the running speed of urban rail vehicles, the length of vehicle formation and the reduction of tunnel cross section, the aerodynamic load of the door system during vehicle operation is becoming larger and larger, and it is more and more difficult to ensure the sealing performance of the double-sliding plug door. The sealing performance of the double-sliding plug door is closely related to the door leaf constraint stiffness, the structure of the sealing rubber strip, etc.

[0003] Patent CN112901002A discloses a double-sliding plug door system with a multi-point constraint system and an air-tight rubber strip, which has good dynamic sealing performance. However, it transmits power to the ends of the cross beam through a transmission shaft that is almost equal in length to the mechanism to realize the side constraint and power transmission of the door system, which has high system complexity and occupies a large space. The structure of the side auxiliary locking device used is complex and has high cost. The three-roller swing arm + balance wheel is used to realize the lower guide and solve the problem of easy separation of the two door leaves in the X direction (vehicle length direction), but the balance wheel will form a force amplification lever in the door system, generating a large downward load, thereby bringing a large load to the mechanism, which is easy to cause problems such as large transmission resistance, jamming and even component fracture. In addition, the double-lip air-tight rubber strip structure used has a large door closing rubber strip rebound force when the rubber strip compression amount is large, which affects the door closing function, and when the rubber strip compression amount is small, the compression force provided by the rubber strip support arm decreases, and the sealing performance decreases, i.e. it is impossible to maintain a moderate compression force on both lips at different compression amounts.

[0004] In summary, the purpose is to realize effective constraint of the door system, and further, the purpose is to improve the static and dynamic sealing performance of the door system under effective constraint. SUMMARY

[0005] The purpose of the present application is to provide a double-sliding plug door system with a constraint system having high stiffness and a rubber strip having good sealing performance, and the constraint system has a simple structure and occupies a small space, and will not bring a large load to the bearing and driving mechanism.

[0006] To achieve the above purpose, the present application adopts the following technical scheme:

[0007] The present application discloses a double-sliding plug door system, a bearing and driving mechanism, the bearing and driving mechanism is fixed on the vehicle body, and an end constraint device is rotatably installed on the bearing and driving mechanism.

[0008] A pair of door leaves, two said door leaves are movably arranged on said carrying driving mechanism, two said door leaves have a first position of inner plug closing and a second position of apart unfolding, said door leaves are switched from said second position to said first position, so as to make said end part restraining device limit said door leaves;

[0009] A middle part restraining hook, said middle part restraining hook is fixed on a vehicle body, said door leaves are in said first position, said middle part restraining hook is coupled with a second lock catch of a middle part of a door leaf backstop;

[0010] A lower part swing guiding device, said lower part swing guiding device is fixed on a vehicle body bottom, said lower part swing guiding device comprises a swing arm driving shaft and a stopper, a vertical synchronization rod assembly is connected between said swing arm driving shaft and said carrying driving mechanism, said carrying driving mechanism drives said vertical synchronization rod assembly when said door leaves are switched from said second position to said first position, in turn, said swing arm driving shaft is driven, so as to make said stopper realize movement guiding and limiting of a lower part of said door leaves.

[0011] Further, said carrying driving mechanism further comprises a rack, a rotary driving rod, a nut assembly, a transmission rack, a crossbeam and a door carrying rack assembly; said rack is fixedly connected to a vehicle body, said rotary driving rod is rotationally connected to said rack, said nut assembly is connected with said rotary driving rod in a screw-nut pair, said transmission rack, said nut assembly and said crossbeam are rotationally connected; said crossbeam is supported by said rack and can move along a vehicle width horizontal direction on said rack, said door carrying rack assembly can move along a length direction of said crossbeam, said door leaves are fixed on said door carrying rack assembly; said nut assembly, said transmission rack and said crossbeam constitute a crank slider mechanism; when approaching said first position, said rotary driving rod drives said nut assembly to rotate, so as to realize driving and over dead point locking of said crossbeam along said vehicle width horizontal direction; when said door leaves are plugged into position, said end part restraining device realizes restraining of two end parts of said crossbeam.

[0012] Further, said end part restraining device is located in a vicinity of two end parts of said crossbeam, said end part restraining device comprises a cam mechanism and a lock catch restraining pair; said cam mechanism comprises a cam and a follower, said cam is fixed on an end part of said rotary driving rod, said follower is rotationally connected to said rack; said lock catch restraining pair comprises a lock hook and a first lock catch, said lock hook is fixed on said follower, said first lock catch is fixed on said crossbeam;

[0013] Movement of said lock hook and said first lock catch is coordinated with each other, when said rotary driving rod and said cam rotate together, said follower swings together with said lock hook, cooperates with plug-pull movement of said crossbeam, so that said lock hook is coupled with said first lock catch, to realize restraining of two end parts of said crossbeam.

[0014] Further, the angle ψz between the line connecting the rotation center of the hook and the rotation center of the cam and the line connecting the rotation center of the cam and the maximum lift point of the cam is -35°≤ψz≤-1° when the hook is coupled with the first lock, and the hook and the first lock have a certain overlap amount.

[0015] Further, the force of the hook and the first lock acts on the swing center of the hook when the hook is coupled with the first lock.

[0016] Further, the bearing driving mechanism further comprises an upper slide, which is arranged on the frame and comprises a straight section, a curved section and a groove section, the straight section, the curved section and the groove section are connected by a circular arc, the groove section is perpendicular to the straight section, and the groove section is used to constrain the door leaf in the X direction in the closed state.

[0017] The top end of the door carrying frame assembly is fixed with a roller, which is clamped in the upper slide to control the motion trajectory of the door leaf.

[0018] Further, the vertical synchronization rod assembly comprises a synchronization rod, an upper rotating arm and a connecting rod, the upper part of the synchronization rod is rotatably connected to the vehicle body, the upper rotating arm is fixedly connected to the upper part of the synchronization rod, the connecting rod is rotatably connected to the upper rotating arm and the cross beam assembly at both ends, and the lower part of the synchronization rod is fixedly connected with the swing arm driving shaft.

[0019] Further, the front of the door leaf is provided with a finger protection adhesive tape.

[0020] The upper, lower and rear of the door leaf are provided with a continuous peripheral sealing adhesive tape, and the peripheral sealing adhesive tape comprises a flared lip.

[0021] When the door leaf is inserted into place, the finger protection adhesive tapes of the left and right door leaves are in contact and extrusion with each other, and the flared lip of the peripheral sealing adhesive tape is in contact and extrusion with the sealing surface on the vehicle body. The vehicle body is fixed with a door sill and a pressing strip, and the outer surfaces of the door sill and the pressing strip form the sealing surface. The door leaf is further provided with a blocking pin fixed to the bottom of the door leaf, and the two door leaves are closed and affected by the lower swing guide device, so that the blocking pin is coupled with the embedding block on the door sill to limit the lower part of the front of the door leaf.

[0022] Further, the peripheral sealing adhesive tape further comprises an installation anchor point, an inner support arm, an outer support arm and a pressure balance hole.

[0023] The inner support arm and the outer support arm form an adhesive tape cavity therebetween, the flared lip is arranged at the intersection of the inner support arm and the outer support arm, and the flared lip is cantilevered and arranged at the installation anchor point of the peripheral sealing adhesive tape; the pressure balance hole is arranged on the inner support arm, and the outer support arm is recessed towards the adhesive tape cavity and maintains the recessed tendency under the negative pressure working condition outside the vehicle.

[0024] Further, the peripheral sealing rubber strip further comprises a leaning arm, one end of the leaning arm is connected with the mounting anchor point, and the other end is connected with the outer supporting arm, one end of the inner supporting arm is connected with the outer supporting arm, and the other end is connected with the mounting anchor point.

[0025] The distance from the intersection of the leaning arm and the outer supporting arm to the mounting anchor point is greater than the distance from the mounting anchor point to the vertical line of the eight-shaped lip and the outer side of the leaning arm.

[0026] The beneficial effects of the present application are:

[0027] The end restraint device of the present application realizes the restraint of the two ends of the cross beam, and in combination with the over-passing dead point locking device of the middle nut assembly, a cross beam multi-point restraint device of the cross beam assembly is constructed; based on the cross beam multi-point restraint device and the vertical synchronous rod assembly, the hook-shaped part of the upper swing arm can reliably restrain the upper part of the door leaf backstop; the lower swing guiding device can realize the X and Y direction locking and X direction compression of the lower part of the door leaf backstop, and the lower swing guiding device can also make the lower part of the door leaf be inserted at an angle of about 35° so that the blocking pin can form a restraint on the lower part of the door leaf front stop; in combination with the mutual coupling effect of the backstop middle part restraint hook and the lock catch, a reliable multi-point restraint system of the door system is constructed, and the door system has high bearing strength.

[0028] When the door system is in the multi-point restraint state, in the static working condition, the peripheral sealing rubber strip is in extrusion contact with the sealing surface, and the finger protection rubber strips of the left and right door leaves are extruded with each other, and the door system has good sealing performance; in the positive pressure working condition outside the vehicle, the outer sealing lip can be more reliably pressed on the sealing surface, and effective peripheral sealing in this working condition is realized; in the negative pressure working condition outside the vehicle, the door system is in the multi-point restraint state, the Y direction displacement of each point of the door leaf under the action of the air pressure is small, and the pressure difference makes the vehicle interior gas enter the cavity of the peripheral sealing rubber strip through the pressure balance hole, the cavity is directionally expanded, the outer supporting arm always maintains the concave trend, the displacement of the intersection of the eight-shaped lip is very small, and the inner sealing lip can always be in contact and extrusion with the sealing surface, so that the door system still has effective peripheral sealing in the negative pressure working condition, and in summary, the reliable multi-point restraint of the door system in combination with the design of the sealing rubber strip makes the door system have good static and dynamic sealing performance. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the double-leaf sliding door of the present application;

[0030] Figure 2 It is a schematic diagram of the cross section of the bearing driving mechanism of the present application;

[0031] Figure 3 It is a schematic diagram of the cross section of the double-leaf sliding door system of the present application;

[0032] Figure 4 It is a schematic diagram of the side upper restraint structure of the door system of the present application (side upper restraint structure movement stage);

[0033] Figure 5 The gap δ between the different ψz of the application and the hook and the first lock is plotted;

[0034] Figure 6 The schematic diagram of the middle hook restraint structure in the application is shown in the figure;

[0035] Figure 7 The schematic diagram of the lower swing guide device structure in the application is shown in the figure;

[0036] Figure 8 The schematic diagram of the blocking pin restraint structure in the application is shown in the figure.

[0037] 1, bearing drive mechanism; 2, door leaf; 3, lower swing guide device; 4, vertical synchronization rod assembly; 5, middle restraint hook; 6, door sill; 7, compression strip;

[0038] 101, rack; 102, rotating drive rod; 103, nut assembly; 104, transmission frame; 105, cross beam assembly; 1051, cross beam; 1052, first lock;

[0039] 106, door carrying frame assembly; 107, upper slide rail; 108, end restraint device; 1081, cam; 1082, follower; 1083, hook;

[0040] 201, blocking pin; 202, peripheral sealing rubber strip; 2021, inner support arm; 2022, outer support arm; 2023, eight-shaped lip; 2024, pressure balance hole;

[0041] 203, finger protection rubber strip; 204, second lock;

[0042] 301, swing arm drive shaft;

[0043] 401, synchronization rod; 402, upper rotating arm; 403, connecting rod. DETAILED DESCRIPTION

[0044] In order to make the technical means, creative features, purposes and effects realized by the application easy to understand, the application is further described below in combination with specific embodiments.

[0045] It should be noted that in the description of the application, the terms "front", "back", "left", "right", "up", "down", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and not required to be constructed and operated in a particular orientation, therefore cannot be understood as a limitation of the application. The terms "front", "back", "left", "right", "up", "down" used in the description of the application refer to the directions in the drawings, and the terms "inner", "outer" respectively refer to the directions towards or away from the geometric center of a particular component.

[0046] As Figures 1-7 shown, the application discloses a double-sliding door system, which comprises a bearing driving mechanism 1, a door leaf 2, a lower swing guiding device 3, a vertical synchronous rod assembly 4 and a middle constraint lock hook 5, and the door leaf 2, the lower swing guiding device 3, the vertical synchronous rod assembly 4 and the middle constraint lock hook 5 are arranged symmetrically about the center of the door system.

[0047] The bearing driving mechanism 1 comprises a rack 101, a rotating driving rod 102, a nut assembly 103, a crossbeam 1051, a door carrying rack assembly 106 and an end constraint device 108; the rack 101 is fixedly connected to a vehicle body, the rotating driving rod 102 is rotationally connected to the rack 101, the crossbeam 1051 is supported by the rack 101 and can move along the horizontal direction of the vehicle width on the rack 101, the door carrying rack assembly 106 can move along the length direction of the crossbeam, and the door leaf 2 is fixed to the door carrying rack assembly 106; the nut assembly 103 is rotationally connected to the rotating driving rod 102, the rotating driving rod 102 drives the nut assembly 103 to rotate to drive the crossbeam along the horizontal direction of the vehicle width and to lock the crossbeam over the dead point; when the door leaf 2 is inserted into place, the end constraint device 108 constrains the two ends of the crossbeam.

[0048] The lower swing guiding device 3 is fixed to the lower part of the vehicle body, and comprises a swing arm driving shaft 301 and a stopper; the top end of the vertical synchronous rod assembly 4 is connected to the crossbeam, and the bottom end is connected to the swing arm driving shaft 301, so that when the crossbeam moves, the swing arm driving shaft 301 is driven to move through the vertical synchronous rod assembly 4, and the stopper restrains the separation of the door leaf 2 along the longitudinal direction of the vehicle during the insertion of the door leaf 2 and after the door leaf 2 is inserted into place.

[0049] The middle constraint lock hook 5 and the door sill 6 are fixed to the vehicle body, the middle constraint lock hook 5 is coupled with the second lock buckle 204 in the middle of the rear of the door leaf 2 after the door leaf 2 is inserted into place, and the lower part of the front of the door leaf 2 is provided with a blocking pin 201, which is coupled with the embedding block on the door sill 6 after the door leaf 2 is inserted into place.

[0050] When the door is opened, the rotating driving rod 102 starts to rotate, the rotation of the rotating driving rod 102 is transmitted to the crossbeam through the nut assembly 103, and the crossbeam is pushed to move along the horizontal direction of the vehicle width. The movement of the crossbeam drives the door carrying rack assembly 106 to move along the length direction of the crossbeam, and further drives the door leaf 2 to open outward. With the movement of the door carrying rack assembly 106, the door leaf 2 starts to expand outward. While the door leaf 2 moves, the vertical synchronous rod assembly 4 rotates with the movement of the crossbeam, and further drives the swing arm driving shaft 301 in the lower swing guiding device 3 to move. The movement of the swing arm driving shaft 301 moves the stopper away from the limiting position, allowing the door leaf 2 to move freely along the longitudinal direction of the vehicle.

[0051] When the door is closed, the rotating drive rod 102 is reversed. The reverse rotation of the rotating drive rod 102 is transmitted to the cross beam through the nut assembly 103, pushing the cross beam to move in the reverse direction along the horizontal direction of the vehicle width.

[0052] The movement of the cross beam drives the door carrier assembly 106 to move along the length direction of the cross beam, and in turn drives the door leaf 2 to close inward. With the movement of the door carrier assembly 106, the door leaf 2 starts to close inward. The movement of the door leaf 2 drives the swing arm drive shaft 301 to move through the vertical synchronization rod assembly 4, so that the stopper returns to the limiting position, thereby inhibiting the separation of the door leaf 2 along the longitudinal direction of the vehicle during the insertion process and after the insertion is completed. The rotating drive rod 102 drives the nut assembly 103 to rotate to achieve the driving of the cross beam along the horizontal direction of the vehicle width and the over-center locking; after the door leaf 2 is inserted in place, the end restraint device 108 locks the cross beam, achieving the end restraint of the cross beam.

[0053] The middle restraint lock hook 5 is coupled with the second lock catch 204 in the middle part of the rear of the door leaf 2, further enhancing the stability of the door leaf 2. The blocking pin 201 in the front lower part of the door leaf 2 is coupled with the embedded block on the door sill 6, ensuring the sealing performance at the front lower part of the door leaf 2.

[0054] In summary, the end restraint device 108 of the present application achieves the restraint of the two ends of the cross beam, in combination with the over-center locking device of the middle nut assembly 103, constructing a multi-point restraint device of the cross beam assembly of the cross beam; based on the multi-point restraint device of the cross beam and the vertical synchronization rod assembly, the hook-shaped part of the upper swing arm can reliably restrain the upper part of the rear of the door leaf; in addition to the X, Y direction locking and X direction compression of the lower swing guide device to the lower part of the rear of the door leaf, the lower part of the door leaf can also be inserted at an angle of about 35°, so that the blocking pin can form a restraint to the lower part of the front of the door leaf; in combination with the mutual coupling effect of the rear middle part restraint lock hook and the lock catch, a reliable multi-point restraint system of the door system is constructed, and the bearing strength of the door system is high.

[0055] The present application will be described below through specific examples.

[0056] A double-opening sliding door system is composed of a bearing drive mechanism 1, a door leaf 2, a lower swing guide device 3, a vertical synchronization rod assembly 4, a middle restraint lock hook 5 fixed to the vehicle body, a door sill 6, a compression strip 7, etc., wherein the bearing drive mechanism 1, the lower swing guide device 3, the middle restraint lock hook 5, the door sill 6, and the compression strip 7 are all fixed to the vehicle body, and the door leaf 2, the lower swing guide device 3, the vertical synchronization rod assembly 4, and the middle restraint lock hook 5 are all arranged symmetrically about the center of the door system.

[0057] The description of the bearing drive mechanism 1 in this embodiment is as follows:

[0058] As Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the load-bearing drive mechanism 1 includes a frame 101 fixed to the vehicle body, a rotary drive rod 102 rotatably connected to the frame 101, a nut assembly 103, a transmission frame 104 rotatably connected to the nut assembly 103, a crossbeam assembly 105 rotatably connected to the transmission frame 104, a gantry assembly 106 movable along the length of the crossbeam assembly 105, and an end restraint device 108, etc.; the crossbeam assembly 105 includes a crossbeam 1051 and a first latch 1052 provided at the end of the crossbeam 1051.

[0059] The end restraint device 108 consists of a cam 1081, a follower 1082, and a locking hook 1083. The cam 1081 is fixed to the vicinity of both ends of the rotary drive rod 102. The follower 1082 is rotatably connected to the frame 101. The locking hook 1083 is fixed to the follower 1082. The cam 1081, which rotates together with the rotary drive rod 102, and the follower 1082 form a cam mechanism. The follower 1082 swings under the drive of the cam 1081. When the door is closed, the swinging locking hook 1083 couples with the first latch 1052 on the crossbeam 1051, forming a Y-direction (Y-direction, the horizontal direction of the vehicle width) restraint on the end of the crossbeam assembly 105.

[0060] In one embodiment, such as Figure 2 As shown, the load-bearing drive mechanism 1 also includes an upper slide rail 107, which is mounted on the frame 101 and includes a straight section, a curved section, and a grooved section. The straight section is arranged along the length of the vehicle, and the grooved section is perpendicular to the straight section. The sections are connected by a circular arc transition. The grooved section is used to form an X-direction constraint on the door leaf 2 when the door is closed. The rollers above the door frame assembly 106 are engaged in the upper slide rail 107 to control the upper movement trajectory of the door leaf 2.

[0061] Furthermore, such as Figure 3 As shown, the nut assembly 103 is rotatably mounted on the rotary drive rod 102, which has threads. The nut assembly 103 and the rotary drive rod 102 form a screw-nut pair connection. Furthermore, a transmission frame 104 is also included. One end of the transmission frame 104 is rotatably connected to the nut assembly 103, and the other end is rotatably connected to the crossbeam 1051. The nut assembly 103, the transmission frame 104, and the crossbeam 1051 constitute a crank-slider mechanism. When the door is closed, the rotary drive rod 102 rotates, causing the end of the transmission frame 104 to rotate and reach a dead center state, achieving central locking.

[0062] Furthermore, such as Figure 3 As shown, the transmission frame 104 has a receiving cavity. When the rotary drive rod 102 rotates clockwise, causing the nut assembly 103 to be located within the receiving cavity, it is in a dead-point state, and the transmission frame 104 cannot continue to rotate, thus locking the crossbeam 1051 at the dead-point. To unlock, simply rotate the rotary drive rod 102 counterclockwise.

[0063] As shown in Figure 4 , the end restraint device 108 of the present application comprises a follower 1082, a cam 1081 and a locking hook 1083. The cam 1081 is symmetrically arranged about the center of the rotating drive rod 102. The follower 1082 is rotationally connected to the side of the frame 101. The locking hook 1083 is fixedly connected or integrated with the follower 1082, and the swing centers of the two are the same, denoted as O2. The first lock 1052 is fixedly installed on the cross beam 1051 and can follow the cross beam 1051 to move in the Y direction, i.e. the pull-up motion. The mechanism drives the rotating drive rod 102 to rotate, thereby driving the cam 1081 to rotate, without the need for an additional power source and transmission rod, etc. to realize distributed power transmission of the mechanism.

[0064] In a further embodiment, as shown in Figure 4 (b), the cam 1081 is fixedly connected with the rotating drive rod 102 in a certain phase, and the fixed connection mode can adopt end face pressing, set screws, etc.

[0065] The follower 1082 and the cam 1081 constitute a cam mechanism. In some further embodiments, the cam mechanism formed by the cam 1081 and the follower 1082 can be a conventional cam mechanism, as shown in Figure 4 (a), or can preferably be in the form of an eccentric wheel and a fork-shaped follower (with an open slot body). The fork-shaped follower can be removed without disassembling the end structure of the rotating drive rod, and has strong maintainability. Since the fork-shaped follower does not close the open slot structure, it also has the advantage of small space occupation. In other embodiments, the follower 1082 can also adopt a closed slot form. The closed slot form has good stress, but the maintainability is reduced. The present application preferably adopts the open slot body form.

[0066] The end restraint device 108 will be further described below by analyzing the coupling process thereof.

[0067] After the mechanism of the door system enters the pull-up section, the relative motion of the locking hook 1083 and the first lock 1052 mainly includes three stages: a separation stage, a waiting coupling stage and a coupling stage.

[0068] In the separation stage, the locking hook 1083 swings periodically about the swing center, and the first lock 1052 moves in the Y direction. The locking hook 1083 and the first lock 1052 are far apart, and the motion trajectories of the two do not interfere with each other.

[0069] During the coupling phase, the locking hook 1083 first rotates clockwise and swings away from the first locking buckle 1052. At this time, the first locking buckle 1052 continues to enter along the Y direction and approaches the rear of the locking hook. Then, the locking hook 1083 swings counterclockwise towards the first locking buckle 1052, and the locking hook reaches above the first locking buckle 1052. The two continue to move, and the locking buckle reaches the inside of the locking hook 1083 until the sliding motion of the first locking buckle 1052 basically stops.

[0070] During the coupling phase, the spool stops moving, and the locking hook 1083 continues to swing counterclockwise, hooking the first latch 1052 with a certain overlap amount 'a'. The interaction force F1 between the two points towards the swing center of the locking hook 1083, so that the force F1 exerted by the first latch 1052 on the locking hook 1083 acts on the swing center and not on the transmission chain from the cam 1081 to the follower 1082. The locking hook 1083 hooks the first latch 1052, thereby forming a Y-direction locking and constraint on the end of the crossbeam 1051.

[0071] It is necessary to ensure that the locking hook 1083 and the first locking buckle 1052 still have a certain overlap under working conditions such as impact vibration, assembly error, and long-term wear. Therefore, the overlap amount a is required to be greater than 0 mm, and the preferred value range is a ≥ 3 mm.

[0072] To prevent interference between the movements of the locking hook 1083 and the first latch 1052 during the coupling stage, reasonable parameter configuration (pre-setting the motion law of the cam mechanism) can avoid interference in their motion trajectories, thus achieving coupling between the locking hook and latch constraint pair and the crossbeam pull motion. Specifically, when the rotary drive rod 102 reaches the locking phase along the closing direction, the rotation angle ψ of the cam 1081 reaches the ψz position. Ψz is the angle between the line connecting the rotation center of the locking hook 1083 to the rotation center of the cam 1081 and the line connecting the rotation center of the cam 1081 to the maximum lift point of the cam. The gap δ between the locking hook tip of the locking hook 1083 and the cylinder of the first latch 1052 varies with the rotation of the rotary drive rod under different ψz values. Figure 6 It can be seen that when the value of ψz exceeds the specified range, for example, when ψz=0, there is a gap δ<0, meaning that the locking hook 1083 and the first locking buckle 1052 will interfere. When ψz=-35°, the gap δ is close to 0, and when -35°≤ψz≤-1°, δ>0. Therefore, the preferred value range of ψz is: -35°≤ψz≤-1° (ψ is positive when it is counterclockwise). This can avoid interference between the locking hook 1083 and the first locking buckle 1052 and achieve coupling between the locking hook and locking buckle constraint pair and the crossbeam pull motion.

[0073] During operation, the rotary drive rod 102 rotates clockwise, and the cams 1081 at both ends of the rotary drive rod 102 rotate accordingly. The design of the cams 1081 allows their contours to push or pull the follower 1082. The follower 1082 oscillates according to the changes in the contour of the cams 1081, and the locking hook 1083 on it also oscillates accordingly. At the same time, the crossbeam 1051 performs a sliding motion. With the oscillation of the follower 1082 and the sliding motion of the crossbeam 1051, the locking hook 1083 gradually approaches and eventually couples into the first latch 1052 fixed on the crossbeam 1051. Because the locking hook 1083 and the first latch 1052 are designed with an overlap, a firm connection between the two is ensured. When the locking hook 1083 is coupled into the first latch 1052, the friction and mechanical engagement force between the two work together to provide a strong restraining force. Because the force of the locking hook 1083 acts on its swing center and not on the transmission chain from the cam to the driven member, the constraint reaction force at the end does not directly act on the rotary drive rod 102, preventing deformation of the rotary drive rod 102. Furthermore, this prevents the rotary drive rod 102 from being subjected to force and becoming non-parallel to the crossbeam, thus increasing the resistance to opening and closing the door; and prevents the driven member from being subjected to force and wearing, thus reducing the stability and wear resistance of the system.

[0074] like Figure 4 and Figure 7 As shown, the vertical synchronizing rod assembly 4 consists of a synchronizing rod 401, an upper rotating arm 402, a connecting rod 403, etc. The upper part of the synchronizing rod 401 is rotatably connected to the vehicle body, and the lower part is fixed to the swing arm drive shaft 301 of the lower swing guide device 3. The upper rotating arm 402 is fixed to the upper part of the synchronizing rod 401 and has a hook-shaped part at one end. The two ends of the connecting rod 403 are rotatably connected to the upper rotating arm 402 and the crossbeam assembly 105, respectively.

[0075] Observation Appendix Figure 4 (a) to 4(c), when the door system is in the chamfered section, the movement of the crossbeam 105 drives the connecting rod 401 to rotate, thereby driving the upper rotating arm 402 and the synchronizing rod 401 to rotate. When the door system is locked in place, the upper rotating arm 402 rotates to the position, and its hook-shaped part hooks the door leaf 3 from the inside, thereby achieving upper constraint of the door leaf rear stop.

[0076] like Figure 3 As shown, the lower swing guide device 3 is fixed to the lower part of the vehicle body. The specific structure can be found in patent CN118008075A, a lower swing guide device.

[0077] like Figure 1 , Figure 3 and Figure 6As shown, the door leaf 2 is fixed to the door carrying frame assembly 106, the inner side lower part of which is provided with a blocking pin 201, the upper, lower and rear blocking parts are provided with a continuous peripheral sealing rubber strip 202, the front blocking part is provided with a finger protection rubber strip 203, and the middle part of the rear blocking part is provided with a second lock catch 204; the peripheral sealing rubber strip 202 contains an inner support arm 2021, an outer support arm 2022, a flared lip 2023 and a pressure balance hole 2024 located in the inner support arm 2021, in addition to the anchor point.

[0078] The peripheral sealing rubber strip 202 of the present embodiment will be described below through specific analysis, as follows:

[0079] As shown in Figure 3 and Figure 6 , specifically, a rubber strip cavity is formed between the inner support arm 2021 and the outer support arm 2022, the flared lip 2023 is arranged at the intersection of the inner support arm 2021 and the outer support arm 2022, and the flared lip 2023 is cantilevered at the anchor point of the peripheral sealing rubber strip 202; the pressure balance hole 2024 is arranged on the inner support arm 2021, and the outer support arm 2022 is recessed towards the rubber strip cavity and maintains the recessed tendency under the negative pressure condition outside the vehicle. Further, the peripheral sealing rubber strip 202 further includes a leaning arm, one end of the leaning arm is connected to the anchor point, and the other end is connected to the outer support arm 2022, one end of the inner support arm 2021 is connected to the outer support arm 2022, and the other end is connected to the anchor point; the distance from the intersection of the leaning arm and the outer support arm to the anchor point is greater than the distance from the anchor point to the vertical line of the outer side surface of the flared lip 2023 and the leaning arm.

[0080] Further, the inner support arm 2021 is a longer cantilever structure, and the wall thickness gradually decreases from the anchor point to the flared lip 2023. Through this design, the wall thickness near the fixed end (anchor point) is larger, which provides sufficient strength and stability to withstand the larger stress from the closing of the vehicle door and the long-term fixed support. The change in wall thickness can bring better elastic deformation capability, so that the sealing rubber strip can fit the sealing surface more closely when under pressure, especially when dynamic deformation occurs during vehicle operation, which can better adapt to these changes and maintain good sealing effect.

[0081] The outer support arm 2022 is concave in shape and is easy to deform. A plurality of pressure balance holes 2024 are arranged on the inner support arm 2021 in the length direction of the peripheral sealing strip 202. The arrangement of the plurality of pressure balance holes can be more evenly distributed in the length direction of the entire sealing strip, which helps to achieve rapid pressure balance at different positions. Especially when encountering rapid changes in the pressure inside and outside the vehicle (such as entering and exiting a tunnel, high-speed driving), it can effectively prevent local pressure accumulation and reduce uneven extrusion on the sealing strip, thereby maintaining the stability of the seal and the smooth operation of the door.

[0082] The intersection of the leaning arm and the outer support arm 2022 is formed at the connection, and the distance from the intersection of the leaning arm and the outer support arm 2022 to the mounting anchor point is greater than the distance from the mounting anchor point to the vertical line of the eight-shaped lip 2023 and the outer side of the leaning arm.

[0083] Through the design, the intersection of the outer support arm 2022 and the leaning arm is away from the mounting anchor point, and the sealing area formed at the eight-shaped lip 2023 is subjected to more uniform compression force when the door is closed. The longer connection section of the leaning arm and the outer support arm 2022 can provide better mechanical support and increase the overall rigidity and stability of the sealing strip under stress.

[0084] Based on the above design, under negative pressure conditions, the strip cavity expands in a specific direction, the outer support arm always maintains a concave trend, the displacement of the intersection of the inner and outer sealing lips is small, and the inner sealing lip is always in contact and extrusion with the sealing surface. Therefore, even a small amount of compression of the sealing strip Δs can ensure good dynamic sealing performance.

[0085] When the outside of the vehicle is under positive pressure, the pressure difference between the inside and outside of the vehicle will press the outer sealing lip of the sealing part more reliably against the sealing surface, thereby achieving effective sealing of the sealing strip under positive pressure conditions outside the vehicle.

[0086] When the door is closed, because of the existence of the strip cavity and the easy deformation of the outer support arm, the gas in the strip cavity enters the vehicle body through the air pressure balance hole, so that the rebound force of the sealing strip is small, and even a large amount of compression of the sealing strip Δs will not affect the closing of the door.

[0087] In summary, the working process of the present application is as follows:

[0088] When the door is closed, (1) the straight line motion section, the rotating drive rod 102 drives the nut assembly 103 to move horizontally, thereby driving the door frame assembly 106 and the door leaf 2 to move horizontally, and the cross beam assembly 105 does not move vertically.

[0089] (2) When the upper part of the door leaf 2 starts to enter the sash, the rollers on the door carrier assembly 106 are in the curved section of the upper slide 107, and are constrained by the slide. The nut assembly 103 rotates while moving along the X direction under the drive of the rotating drive rod 102, and drives the cross beam assembly 105 to move along the Y direction, thereby driving the lock catch 1052 to move, the connecting rod 403 to rotate, the upper swing arm 402 and the synchronization rod 403 to rotate, and the cam drive shaft in the lower swing guide device 3 to start rotating, and the lower part of the door leaf 2 to move in a direction of being inserted at an angle of about 35°. When the peripheral sealing rubber strip 202 comes into contact with the sealing surface (the sealing surface formed by the outer surface of the threshold 6 and the pressing strip 7), the outer support arm 2022 of the peripheral sealing rubber strip 202 is easily deformed, and the gas enters the vehicle body through the pressure balance hole 2024, and the rubber strip has a small rebound force.

[0090] (3) When the door leaf 2 reaches the closed state, the middle crank slider mechanism is in a state of passing through the dead point, the rollers on the door carrier assembly 106 are in the groove section of the upper slide 107, the swing lock hook 1083 is coupled with the lock catch 1052 on the cross beam 1051 to constrain the end of the cross beam assembly 105 (the interaction force F1 between the two points to the swing center of the lock hook 1083), the hook-shaped part of the upper swing arm 402 is coupled with the upper part of the rear frame of the door leaf 2 (the force F2 of the upper swing arm 402 on the door leaf 2 is collinear with the line connecting the two shaft centers of the connecting rod 403), and the end of the cross beam assembly 105 is reliably constrained, thereby establishing a constraint on the upper part of the rear frame of the door leaf. The cam of the lower guide device 3 enters the locking section, the lower part of the rear frame of the door leaf is locked in the X direction and the Y direction, and the lower part of the door leaf is pressed in the X direction, the stop pin 201 at the lower part of the front frame of the door leaf is coupled with the embedded block on the threshold 6 to form a stop pin-embedded block pair, and Y-direction constraint is achieved. The middle constraint lock hook 5 is coupled with the lock catch 204 on the door leaf 2, thereby forming a multi-point constraint system of the door system. At this time, the finger protection rubber strips 203 of the left and right door leaves are in contact and extrusion with each other, the eight-character lips 2023 of the peripheral sealing rubber strips 202 are in contact and extrusion with the outer surface of the pressing strip 7 and the outer surface of the threshold, and the peripheral and middle seals of the door system are formed.

[0091] Under the condition of positive pressure outside the vehicle: the eight-character lips 2023 of the peripheral sealing rubber strips 202 are more reliably pressed on the sealing surface under the action of air pressure, and effective peripheral sealing under this condition is achieved.

[0092] Under the condition of negative pressure outside the vehicle: the door system is in a multi-point constraint state, the points of the door leaf 2 have small Y-direction displacement under the action of air pressure, and the pressure difference causes the vehicle interior gas to enter the cavity of the peripheral sealing rubber strip 202 through the pressure balance hole 2024, the cavity of the peripheral sealing rubber strip 202 expands in a directional manner, the outer support arm 2022 always maintains a concave trend, the eight-character lip intersection point of the eight-character lip 2023 has small displacement, the inner sealing lip can always be in contact and extrusion with the sealing surface, and the door system still has effective peripheral sealing under the condition.

[0093] In summary, the application point of the present application is:

[0094] (1) The key technology of the present application is that the door system has a multi-point restraint system with good rigidity, which includes a cross beam multi-point restraint device, a vertical synchronization rod assembly, a lower swing guide device, a blocking pin and block pair, a middle lock hook, etc.

[0095] The cross beam multi-point restraint device: the cam is fixedly connected to the two ends of the rotary drive rod, when the rotary drive rod and the cam rotate together, the follower swings with the lock hook, cooperates with the sliding motion of the cross beam, so that the lock hook and the lock catch are coupled to realize the restraint of the two ends of the cross beam, combined with the middle driving locking device, the cross beam multi-point restraint device is formed, which transmits the driving force to the end and realizes the upper locking of the door system.

[0096] The vertical synchronization rod assembly: including an upper swing arm, a connecting rod and a synchronization rod, the upper swing arm is rotatably connected to the vehicle body, the connecting rod is rotatably connected to the end of the cross beam and the upper swing arm (non-rotation center) at both ends, and the synchronization rod is fixedly connected to the rotation center of the upper swing arm and the drive shaft of the lower swing guide device at both ends. The Y-direction (vehicle width direction) movement of the cross beam can drive the upper swing arm to rotate, and when the door is closed in place, the end of the cross beam is reliably restrained by the lock hook, and the upper swing arm that is rotated in place forms reliable restraint on the upper part of the door rear.

[0097] The lower swing guide device: the lower end of the synchronization rod is fixedly connected to the drive shaft of the lower swing guide device, and when the cross beam moves in the Y direction, the upper swing arm drives the synchronization rod to rotate, thereby driving the lower swing guide device, and the lower swing guide device adopts a double cam design, which has locking and X-direction compression functions on the X-direction and Y-direction of the lower part of the door, thereby forming reliable restraint on the lower part of the door.

[0098] The blocking pin and block pair: the lower swing guide device makes the lower part of the door insert at an angle of about 35°, and when the door is closed in place, the block on the door sill and the blocking pin on the door form a blocking pin and block pair to form restraint on the front part of the lower part of the door.

[0099] The middle lock hook: the middle lock hook fixedly connected to the vehicle body is coupled with the lock catch in the middle of the door rear, which can form reliable restraint on the middle of the door rear.

[0100] (2) The key technology of the present application is that a support arm is used to maintain a moderate compression force on the eight-shaped lip, which forms continuous sealing at the upper, rear and lower parts of the door system. The structure of the peripheral sealing rubber strip mainly includes an inner support arm, an inner concave outer support arm, an eight-shaped lip arranged in cantilever relative to the rubber strip anchor point, and a pressure balance hole located in the inner support arm, etc. The inner support arm and the outer support arm form a cavity with the installation anchor point.

[0101] By the key technology one, the end constraint device is formed by the cam mechanism and the hook and lock constraint pair, combined with the middle dead point locking device, the beam multi-point constraint device of the beam assembly is constructed; based on the beam multi-point constraint device and the vertical synchronous rod assembly, the hook-shaped part of the upper rotating arm can reliably constrain the upper part of the door leaf back; in addition to the X, Y direction locking and X direction compression of the lower part of the door leaf back by the lower swing guide device, the lower part of the door leaf can be inserted at about 35° direction to make the blocking pin form constraint on the lower part of the door leaf front; combined with the mutual coupling effect of the rear back middle constraint hook and the lock, the reliable multi-point constraint system of the door system is constructed, and the door system has high bearing strength.

[0102] By the key technologies one and two, the door system is in a multi-point constraint state, in the static working condition, the peripheral sealing rubber strip and the sealing part are in extrusion contact, the left and right door leaf protection finger rubber strips are extruded, and the door system has good sealing performance; in the vehicle external positive pressure working condition, the outer sealing lip can be more reliably pressed on the sealing surface, and effective peripheral sealing in this working condition is realized; in the vehicle external negative pressure working condition, the door system is in a multi-point constraint state, the Y direction displacement of each point of the door leaf is small under the action of the air pressure, the pressure difference makes the vehicle interior gas enter the peripheral sealing rubber strip cavity through the pressure balance hole, the cavity is directionally expanded, the outer supporting arm always maintains the concave trend, the displacement of the eight-character lip intersection point is small, and the inner sealing lip can always be in contact and extrusion with the sealing surface, so that the door system still has effective peripheral sealing in the negative pressure working condition, and in summary, the reliable multi-point constraint of the door system combined with the design of the sealing rubber strip makes the door system have good static and dynamic sealing performance.

[0103] By the key technology two, the inner and outer supporting arms can keep the eight-character lip in moderate compression, in the door closing process, the outer supporting arm of the peripheral sealing rubber strip is prone to deformation, and the gas enters the vehicle body interior through the air pressure balance hole, so that the peripheral sealing rubber strip has small rebound force and small door closing resistance, which is beneficial to ensuring the opening and closing functions of the door system.

[0104] By the key technology one, the beam multi-point constraint device avoids the use of an additional transmission rod to realize reliable end constraint of the beam, and has simple structure and small space occupation; the door system avoids the use of a side auxiliary locking device, and further reduces the system complexity and weight.

[0105] The lower swing guide device is adopted instead of the conventional balance wheel and three swing arm structure, and the balance wheel in the door system forms a force lever and generates a large downward load, thereby bringing great load to the mechanism.

[0106] According to the technical knowledge, the application can be realized by other embodiments without departing from the spirit or essential characteristics thereof. Therefore, the above disclosed embodiments are only examples in all aspects, and are not the only ones. All changes within the scope of the application or within the scope equivalent to the application are included in the application.

Claims

1. A double-opening sliding door system, characterized in that, include: The load-bearing drive mechanism (1) is fixed on the vehicle body, and an end restraint device (108) is rotatably mounted on the load-bearing drive mechanism (1). A pair of door panels (2), the two door panels (2) are movably mounted on the load-bearing drive mechanism (1), the two door panels (2) have a first position with the inner plug closed and a second position with the door panels (2) open apart, when the door panels (2) switch from the second position to the first position, so that the end restraint device (108) moves to limit the door panels (2). The central constraint hook (5) is fixed to the vehicle body. When the door leaf (2) is in the first position, the central constraint hook (5) is coupled to the second latch (204) in the middle of the rear section of the door leaf (2). The lower swing guide device (3) is fixed to the bottom of the vehicle body. The lower swing guide device (3) includes a swing arm drive shaft (301) and a stop. A vertical synchronous rod assembly (4) is connected between the swing arm drive shaft (301) and the load-bearing drive mechanism (1). When the door leaf (2) switches from the second position to the first position, the load-bearing drive mechanism (1) drives the vertical synchronous rod assembly (4), and then drives the swing arm drive shaft (301) so that the stop can guide and limit the movement of the lower part of the door leaf. The load-bearing drive mechanism (1) further includes a frame (101), a rotary drive rod (102), a nut assembly (103), a transmission frame (104), a crossbeam (1051), and a gantry assembly (106); the frame (101) is fixed to the vehicle body, the rotary drive rod (102) is rotatably connected to the frame (101), the nut assembly (103) and the rotary drive rod (102) form a screw-nut pair connection, and the transmission frame (104), the nut assembly (103), and the crossbeam (1051) are rotatably connected; the crossbeam (1051) is supported by the frame (101) and can be mounted on the frame (101). The door panel (2) moves along the horizontal direction of the vehicle width. The door frame assembly (106) can move along the length direction of the crossbeam (1051). The door panel (2) is fixed on the door frame assembly (106). The nut assembly (103), the transmission frame (104), and the crossbeam (1051) constitute a crank-slider mechanism. When approaching the first position, the rotary drive rod (102) drives the nut assembly (103) to rotate, thereby driving the crossbeam (1051) along the horizontal direction of the vehicle width and locking it at the dead point. When the door panel (2) is inserted into place, the end constraint device (108) constrains both ends of the crossbeam (1051).

2. The double-opening sliding door system according to claim 1, characterized in that, The end constraint device (108) is located at both ends of the crossbeam (1051). The end constraint device (108) includes a cam mechanism and a hook-and-buckle constraint pair. The cam mechanism includes a cam (1081) and a follower (1082). The cam (1081) is fixed to the end of the rotary drive rod (102), and the follower (1082) is rotatably connected to the frame (101). The hook-and-buckle constraint pair includes a hook (1083) and a first buckle (1052). The hook (1083) is fixed on the follower (1082), and the first buckle (1052) is fixed on the crossbeam (1051). The movements of the locking hook (1083) and the first locking buckle (1052) are coordinated. When the rotary drive rod (102) and the cam (1081) rotate together, the follower (1082) swings together with the locking hook (1083), cooperating with the pull motion of the crossbeam (1051), so that the locking hook (1083) is coupled with the first locking buckle (1052) to achieve the constraint of both ends of the crossbeam (1051).

3. The double-opening sliding door system according to claim 2, characterized in that, When the locking hook (1083) is coupled to the first locking buckle (1052), the angle ψz between the line connecting the rotation center of the locking hook (1083) to the rotation center of the cam (1081) and the line connecting the rotation center of the cam (1081) to the maximum lift point of the cam (1081) is: -35°≤ψz≤-1°, and the locking hook (1083) and the first locking buckle (1052) have a certain overlap.

4. The double-opening sliding door system according to claim 1, characterized in that, The load-bearing drive mechanism (1) further includes an upper slide rail (107), which is mounted on the frame (101). The upper slide rail (107) includes a straight section, a curved section and a grooved section. The straight section, the curved section and the grooved section are connected by a circular arc transition. The grooved section is perpendicular to the straight section. The grooved section is used to form an X-direction constraint on the door leaf (2) in the closed state. The top of the door frame assembly (106) is fixed with a roller, which is engaged in the upper slide rail (107) to control the movement trajectory of the door leaf (2).

5. The double-opening sliding door system according to claim 1, characterized in that, The vertical synchronizing rod assembly (4) includes a synchronizing rod (401), an upper rotating arm (402), and a connecting rod (403). The upper part of the synchronizing rod (401) is rotatably connected to the vehicle body. The upper rotating arm (402) is fixedly connected to the upper part of the synchronizing rod (401). The two ends of the connecting rod (403) are rotatably connected to the upper rotating arm (402) and the crossbeam assembly (105), respectively. The lower part of the synchronizing rod (401) is fixedly connected to the swing arm drive shaft (301).

6. The double-opening sliding door system according to claim 1, characterized in that, The front edge of the door leaf (2) is provided with a finger guard strip (203); The upper, lower and rear sections of the door panel (2) are provided with continuous peripheral sealing strips (202), and the peripheral sealing strips (202) include a figure-eight lip (2023). When the door leaf (2) is inserted into place, the finger guard strips (203) of the left and right door leaves (2) come into contact and squeeze each other, and the figure-eight lip (2023) of the peripheral sealing strip (202) comes into contact and squeezes with the sealing surface on the vehicle body. The vehicle body is fixed with a sill (6) and a pressure strip (7), and the outer surface of the sill (6) and the pressure strip (7) forms the sealing surface. It also includes a stop pin (201) fixed to the bottom of the door leaf (2). When the two door leaves (2) are closed and acted upon by the lower swing guide device (3), the stop pin (201) is coupled to the insert on the threshold (6) to limit the lower part of the front of the door leaf (2).

7. The double-opening sliding door system according to claim 6, characterized in that, The peripheral sealing strip (202) also includes an installation anchor point, an inner support arm (2021), an outer support arm (2022), and a pressure balance hole (2024). A rubber strip cavity is formed between the inner support arm (2021) and the outer support arm (2022). The figure-eight lip (2023) is located at the intersection of the inner support arm (2021) and the outer support arm (2022), and the figure-eight lip (2023) is cantilevered at the installation anchor point of the peripheral sealing rubber strip (202). The pressure balance hole (2024) is located on the inner support arm (2021), and the outer support arm (2022) is concave towards the rubber strip cavity, and maintains the concave trend under negative pressure conditions outside the vehicle.

8. The double-opening sliding door system according to claim 7, characterized in that, The peripheral sealing strip (202) also includes a support arm, one end of which is connected to the mounting anchor point and the other end of which is connected to the outer support arm (2022). One end of the inner support arm (2021) is connected to the outer support arm (2022) and the other end of which is connected to the mounting anchor point. The distance from the intersection of the support arm and the outer support arm (2022) to the installation anchor point is greater than the distance from the installation anchor point to the perpendicular line between the figure-eight lip (2023) and the outer side of the support arm.

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