Single-leaf large-opening-degree sliding plug door system

Abstract

A single-leaf large-opening-degree sliding plug door system comprises a door plate and a fixed frame module fixed to a vehicle body, and a sliding frame module is arranged on the fixed frame module in a sliding mode; the door plate is connected with the sliding cylinder assembly through the door carrying frame, and the sliding cylinder assembly is arranged on the sliding frame module in a sliding mode. The sliding cylinder assembly is connected with the driving connecting rod module, and the driving connecting rod module drives the sliding cylinder assembly to move; a rocker arm assembly is arranged in the driving connecting rod module and connected with a door shaft through a connecting rod, and the door plate is connected with the door shaft. Compared with the prior art, the invention has the following beneficial effects: 1, a parallel-bar structure is used, the overall rigidity is improved, the space occupied by the mechanism is greatly reduced, the structure is compact, the overall size of the mechanism is small, the requirements of more vehicle types are met, and the vehicle is not limited by an air duct any more; 2, a plane crank sliding block dead point structure is adopted as a locking structure, and the vehicle door unlocking problem occurring in the vehicle bumping or emergency braking process is solved;

Description

Technical Field

[0001] The present invention relates to the field of vehicle doors, and particularly to a single-leaf large-opening plug door system. Background Art

[0002] Plug door systems can be divided into two types according to the state of the door leaf: double-leaf and single-leaf. With the market demand, the demand for a single double-leaf plug door configuration can no longer meet the needs of customers, especially in the front doors of buses and vehicles with a body length of 26 meters and multiple door arrangements. Generally, the front doors of buses mostly use the inward-swing door method to meet the configuration requirements (inward-swing doors have obvious shortcomings in aesthetics and safety), and at the same time, double-leaf plug doors cannot be matched to the front doors. Therefore, the development of conventional single-leaf (opening ≤ 750 mm) and large-opening single-leaf (opening ≥ 950 mm) can effectively solve the configuration requirements of the front doors of buses. While ensuring the opening, the problem of interference between the door running track and components such as the rearview mirror of the vehicle body is solved. How to ensure that a single-leaf plug door has a larger opening and better passability is a problem that needs to be solved preferentially for the reliability and safety of the single-leaf plug door. To solve this problem, additional door closing and locking mechanisms and emergency unlocking structures in the closed state are required to ensure the safety mechanism of the vehicle.

[0003] Currently, there are mainly two ways to use the door closing and locking mechanism: The first is the locking lead screw. The electromagnetic clutch is used to energize the locking lead screw. In the closed state, the electromagnetic clutch is energized to ensure that the lead screw is locked. In the open state, the electromagnetic clutch is de-energized, and the lead screw is unlocked to achieve unlocking. When emergency opening is required in the closed state, the electromagnetic clutch is de-energized and the lead screw is unlocked to ensure that the door can be opened in the emergency state. There is a risk of abnormal opening of the door when the electromagnetic clutch of this structure is in the non-energized state. The second is the mechanical dead point locking. The crank-slider structure in the four-bar linkage structure is used for locking. When the track of the crank connecting rod and the slider stroke is in a straight line; at this time, the two axes of the connecting rod and the center of rotation of the crank are in a straight line at three points, that is, two dead points are formed; one of the two dead points is 0°, and the other is 180°; the usage methods of different structures will be slightly different. Currently, the mechanical dead point structure mainly has a planar method and a vertical method. Among them, the mechanical dead point of the vertical method has the fault of being easily automatically unlocked during the vehicle bumping process, and there are many deficiencies compared with the mechanical dead point of the planar method. Emergency unlocking in the mechanical dead point method requires external force to force the mechanism to pass through the dead point, otherwise the structure cannot be unlocked in the emergency state. As a mechanical dead point structure requires relatively more unlocking mechanisms, how to make the structure simple and reliable is the key to ensuring the safety of the door, especially when applied in the field of public transportation, the requirement for safety is more critical.

[0004] As a plug door system used in passenger cars, while ensuring the door opening, the structure also needs to be more compact to ensure that the plug mechanism assembly can be effectively arranged in the air duct to meet the requirements of various vehicle models. The prior art generally adopts the following two methods: First: The front door mostly adopts an inward-swinging door structure configuration or a conventional single-leaf plug door (opening ≤ 750 mm) configuration; it is difficult to meet the requirements when there is a need for a larger opening (opening ≥ 950 mm).

[0005] Second: Due to the requirement of a large opening (opening ≥ 950 mm), the length of the single light bar (or single-track) mechanism is relatively long, and there is insufficient air duct space, making it impossible to arrange the door pump mechanism. Summary of the Invention

[0006] The technical problem to be solved by the present invention is: how to ensure a larger opening of a single-leaf plug door and ensure the reliability and safety of the single-leaf plug door. Therefore, a single-leaf large-opening plug door system is provided.

[0007] To solve the above problems, the present invention is realized through the following technical solutions: A single-leaf large-opening plug door system includes a door panel and a fixed frame module fixed to the vehicle body. Among them, a carriage module is slidably arranged on the fixed frame module; the door panel is connected to a sliding cylinder assembly through a door carrier, and the sliding cylinder assembly is slidably arranged on the carriage module; and the sliding cylinder assembly is connected to a driving link module, and the driving link module drives the sliding cylinder assembly to move; a rocker arm assembly is arranged in the driving link module, the rocker arm assembly is connected to a door shaft through a link, and the door panel is connected to a door shaft.

[0008] Long circular holes are arranged on both the left and right sides of the fixed frame module, and both ends of the carriage module slide in the long circular holes in the Y direction; and a track guide plate support is arranged on the inner side of the fixed frame back plate of the fixed frame module, a track guide plate is arranged on the front side of the track guide plate support, a track groove is arranged in the track guide plate, the track groove is an arc groove, and the carriage module slides in the track groove through a guide bearing.

[0009] The carriage module includes a first guide light bar and a second guide light bar, the first guide light bar and the second guide light bar are arranged in parallel, the left ends of the first guide light bar and the second guide light bar are commonly connected with a left hanging plate, and the right ends of the first guide light bar and the second guide light bar are commonly connected with a right hanging plate; rolling bearings are arranged at both ends of the first guide light bar and the second guide light bar, and the rolling bearings at both ends are respectively arranged to roll in the long circular holes of the fixed frame module; a sliding cylinder assembly is slidably arranged on the first guide light bar and the second guide light bar.

[0010] The sliding cylinder assembly includes a sliding cylinder body, two through holes are arranged in the sliding cylinder body, at least two linear bearings are arranged in each through hole, and two guide light bars are arranged on the two linear bearings; At least one link connecting bolt is arranged on the side of the sliding cylinder body, and the sliding cylinder body is connected to the driving link module through the link connecting bolt; A guide wheel fixing frame is arranged on the top of the slide cylinder body, and a guide bearing is arranged on the guide wheel fixing frame.

[0011] The bottom of the slide body is connected to the door-carrying frame rotating plate through a pin shaft, the door-carrying frame rotating plate is connected to the door-carrying frame, and the door-carrying frame is connected to the door plate.

[0012] The driving connecting rod module includes a screw fixing bracket, to which a Sierra door beam profile is fixedly connected, and a screw is connected to the screw fixing bracket via a bearing, the screw is connected to the motor reducer through a transmission mechanism, the cylinder body of the motor reducer is fixed on the motor fixing bracket, and the motor fixing bracket is fixedly connected to the Sierra door beam profile; a screw nut is sleeved on the screw, and the screw nut is fixedly connected to the slide assembly; the rocker arm assembly is connected to the left and right ends of the Sierra door beam profile via U-shaped clamps respectively.

[0013] The rocker arm assembly includes a first rocker arm, a first end of the first rocker arm is connected to a U-shaped clamp through a first hinge shaft, a third hinge shaft is provided at the other end of the first rocker arm, and the third hinge shaft is connected to a fixed frame module; the middle part of the first rocker arm is connected to one end of the second rocker arm through a second hinge shaft, a through hole is provided at the other end of the second rocker arm, the through hole is connected to a connecting rod through a fourth hinge shaft, and the other end of the connecting rod is hinged to the door shaft.

[0014] The lead screw nut is connected with a lead screw nut support.

[0015] An emergency unlocking module is provided in the driving connecting rod module, and the emergency unlocking module includes an unlocking spring, one end of which is fixed on an unlocking fixing frame, and the unlocking fixing frame is fixed on the fixed frame module. The other end of the unlocking spring is connected to the output shaft of the unlocking cylinder, and the cylinder body of the unlocking cylinder faces the slide module.

[0016] The fixed frame module includes a left bracket and a right bracket, and a fixed frame back plate and a wire trough bracket are arranged between the left bracket and the right bracket, and the left bracket, the right bracket, the fixed frame back plate and the wire trough bracket together form a rectangular frame; An adjustment plate is connected at the bottom of the left bracket and the right bracket, and an adjustment hole is arranged on the adjustment plate. The right bracket is fastened to the vehicle body through front and rear adjustment bolts and stop pads; a height adjustment bolt is arranged on the adjustment plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The double-bar structure improves the overall rigidity while greatly reducing the space occupied by the mechanism. The structure is compact and the overall size of the mechanism is small, which can meet the needs of more vehicle models and no longer restrict the vehicle from being restricted by the air duct; 2. The locking structure adopts a flat crank slider dead point structure, which can prevent door unlocking problems during vehicle bumps or emergency braking; 3. The emergency unlocking structure is simple and practical, solving problems such as complex structure, large gravity, and complex control logic during mechanical unlocking. Description of the Drawings

[0018] Figure 1 It is the overall structure diagram of the present invention; Figure 2 It is the structure diagram of the fixed frame module; Figure 3 It is the structure diagram of the carriage module; Figure 4 It is the structure diagram of the sliding cylinder assembly; Figure 5 It is the structure diagram of the driving link module; Figure 6 It is the structure diagram of the rocker arm assembly; Figure 7 It is the state diagram of the rocker arm assembly in the closed door state; Figure 8 It is the state diagram of the rocker arm assembly in the open door state; Figure 9 It is the three-dimensional view of the fixed frame module 46, the carriage module 210 and the driving link module 146 assembled together; Figure 10 For the closed door state Figure 9 Top view; Figure 11 For the open door state Figure 9 Top view; Figure 12 It is the schematic diagram of the closed door position; Figure 13 It is the schematic diagram of the open door position; Figure 14 It is the structure diagram of the door panel assembly; Figure 15 It is the limit structure in the door panel assembly; Figure 16 It is the overall structure diagram of the present invention.

[0019] Door lock 1, first guiding optical bar 2, second guiding optical bar 3, rolling bearing 4, anti-reverse pad 5, rocker arm assembly 6, connecting rod bolt 7, door carrier rotating plate 8, guide wheel fixing bracket 9, guiding bearing 10, lead screw fixing bracket 11, plug door crossbeam profile 12, lubricating nozzle 13, transmission mechanism 14, motor fixing bracket 15, lead screw 16, door shaft fixing support 17, pin shaft 18, left hanging plate 20, right hanging plate 21, left bracket 22, sliding cylinder assembly 23, U-shaped clamp 24, limit block 26, door panel limit block 27, height limit block 28, lateral limit block 29, proximity switch 30, lead screw nut support 31, motor reducer 32, rubber strip 33, right bracket 34, lead screw nut 35, drag chain 37, unlocking fixing bracket 38, wire groove bracket 39, unlocking cylinder 40, front and rear adjusting bolt 41, oblong hole 42, track guide plate 43, adjusting plate 44, track guide plate support 45, fixed frame module 46, bolt 47, unlocking spring 49, emergency unlocking module 50, first rocker 61, second rocker 62, third hinge shaft 63, through hole 64, connecting rod 68, door shaft 81, door panel 91, door carrier 122, driving connecting rod module 146, sliding frame module 210, sliding cylinder body 231, linear bearing 232, track groove 431. Detailed implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0021] As Figure 1 shown, a single-leaf large-opening plug door system includes a door panel 91 and a fixed frame module 46 fixed to the vehicle body. Among them, a sliding frame module 210 is slidably arranged on the fixed frame module 46; the door panel 91 is connected to the sliding cylinder assembly 23 through a door carrier 122, and the sliding cylinder assembly 23 is slidably arranged on the sliding frame module 210; and the sliding cylinder assembly 23 is connected to a driving connecting rod module 146, and the driving connecting rod module 146 drives the sliding cylinder assembly 23 to move; a rocker arm assembly 6 is arranged in the driving connecting rod module 146, the rocker arm assembly 6 is connected to the door shaft 81 through a connecting rod 68, and the door panel 91 is connected to a door shaft 81.

[0022] As Figure 2 、 Figure 3As shown, the fixed frame module 46 includes a left bracket 22 and a right bracket 34. A fixed frame back plate and a wire trough bracket 39 are arranged between the left bracket 22 and the right bracket 34. In this way, the left bracket 22, the right bracket 34, the fixed frame back plate and the wire trough bracket 39 jointly enclose a rectangular frame. Among them, the left bracket 22 and the right bracket 34 are mainly used to connect with the vehicle body and can be adjusted in the front-back and up-down directions with the vehicle body. Taking the right bracket 34 as an example to illustrate the adjustment method, an adjusting plate 44 is connected to the bottoms of the left bracket 22 and the right bracket 34. Adjusting holes are provided on the adjusting plate 44. The right bracket 34 is fastened to the vehicle body through front-back adjusting bolts 41 and anti-loosening washers 5. Since the position of the front-back adjusting bolts 41 in the adjusting holes can be adjusted, the front-back installation position of the fixed frame module 46 and the vehicle body can be adjusted. In addition, by adding or reducing adjusting shims below the adjusting plate 44, the heights of the two ends of the left bracket 22 and the right bracket 34 and the vehicle body in the Z direction can be made consistent (not shown in the figure). Therefore, by adding or reducing adjusting shims, the up-down installation position (Z axis) of the fixed frame module 46 and the vehicle body can also be adjusted.

[0023] A carriage module 210 is slidably arranged on the fixed frame module 46. Long circular holes 42 are provided in both the left bracket 22 and the right bracket 34. The two ends of the carriage module 210 achieve Y-direction sliding in the long circular holes 42. And a track guide plate support 45 is arranged on the inner side of the fixed frame back plate of the fixed frame module 46. A track guide plate 43 is arranged on the front side of the track guide plate support 45. A track groove 431 is provided in the track guide plate 43. The track groove 431 is an arc-shaped groove. The carriage module 210 slides in the track groove 431 through a guide bearing 10 to ensure that the carriage module 210 operates along a fixed track. Thus, the carriage module 210 performs a "plug and pull" action within the rectangular frame of the fixed frame module 46.

[0024] As Figure 2 shown, a door shaft fixed support 17 is fixed to the inner side of the fixed frame back plate in the fixed frame module 46. The door shaft fixed support 17 hinges the door shaft 81 to the fixed frame module 46. In this way, when the carriage module 210 performs a plug and pull action, the action is transmitted to the lower stabilizer (existing component) through the door shaft, making the door have greater strength and stiffness, better synchronism, more uniform and smooth plug and pull movement, and better stability at the lower part of the door.

[0025] Furthermore, a drag chain 37 is arranged on the wire trough bracket 39 in the fixed frame module 46. The communication line of the carriage module 210 is transmitted through the drag chain 37 to ensure that the signals required by the door can interact with the door controller. At the same time, other fixed cables are transmitted to the door controller through the wire trough bracket 39.

[0026] As Figure 3As shown, the carriage module 210 includes a first guiding optical bar 2 and a second guiding optical bar 3. The first guiding optical bar 2 and the second guiding optical bar 3 are arranged in parallel. The left ends of the first guiding optical bar 2 and the second guiding optical bar 3 are jointly connected with a left hanging plate 20, and the right ends of the first guiding optical bar 2 and the second guiding optical bar 3 are jointly connected with a right hanging plate 21. This structure is a double optical bar structure, which has the following advantages compared with the currently used single optical bar structure: it is more compact in the length direction (X direction) and vehicle height direction (Z axis), and the use of the double optical bar structure to carry the carriage module 210 has better rigidity.

[0027] Bolts 47 are respectively used at both ends of the first guiding optical bar 2 and the second guiding optical bar 3 to connect rolling bearings 4, and the roller bearings 4 at both ends are respectively arranged to roll in the long circular holes 42 of the left bracket 22 and the right bracket 34.

[0028] A sliding cylinder assembly 23 is slidably arranged on the first guiding optical bar 2 and the second guiding optical bar 3, and the sliding cylinder assembly 23 enables the carriage module 210 to have the function of moving back and forth on the vehicle.

[0029] As Figure 4 shown, the sliding cylinder assembly 23 includes a sliding cylinder body 231. Two through holes are arranged in the sliding cylinder body 231, and at least two linear bearings 232 are arranged in each through hole. In this way, the two guiding optical bars are arranged on the two linear bearings 232, enabling the sliding cylinder assembly 23 to slide on the guiding optical bars. The lubrication of the linear bearings 232 is filled through a lubricating oil nozzle 13, and the lubricating oil nozzle 13 is arranged at the top of the sliding cylinder body 231.

[0030] In addition, at least one connecting rod connecting bolt 7 is arranged on the side of the sliding cylinder body 231, and the sliding cylinder body 231 is connected to the driving connecting rod module 146 through the connecting rod connecting bolt 7.

[0031] A guiding wheel fixing frame 9 is arranged at the top of the sliding cylinder body 231, and a guiding bearing 10 is arranged on the guiding wheel fixing frame 9. The guiding bearing 10 is slidably arranged in the track groove 431 of the track guide plate 43. In this way, the sliding cylinder body 231 is matched with the track guide plate 43 in the fixed frame module 46 through the guiding bearing 10 to move along a preset track.

[0032] The bottom of the sliding cylinder body 231 is connected to the door-carrying frame rotating plate 8 through a pin shaft 18. The door-carrying frame rotating plate 8 is connected to the door-carrying frame 122, and the door-carrying frame 122 is connected to the door panel 91, thus realizing the connection between the door panel 91 and the sliding cylinder assembly 23. To ensure that there are no problems with the upper and lower inconsistencies during the opening process of the door panel 91, the door-carrying frame rotating plate 8 is connected to the bottom of the sliding cylinder body 231 through the pin shaft 18 and has a certain degree of rotational freedom to avoid jamming of the door panel 91 during the door opening process.

[0033] It can be seen from the above description that the carriage module 210 is mainly used to connect the door panel 91 to realize the Serra running track of the door panel 91. In this way, the carriage module 210 must have the conditions for movement in both the X direction and the Y direction. To ensure the movement in the X direction, the carriage module 210 adopts a double light bar method. This method can effectively solve the problem that the mechanism should not be too long. At the same time, the double light bar can well solve the problem of mechanism rigidity and save the space occupied by the mechanism. The operation in the Y direction is realized by adding rolling bearings 4 at both ends of the double light bar structure. In this way, the weight of the car door is transferred to the fixed frame module 46 through the rolling bearings 4 at both ends of the light bar.

[0034] The slide assembly 23 of the carriage module 210 is connected to the driving link module 146, and the driving link module 146 drives the slide assembly 23 to move. Figure 5 As shown, the driving connecting rod module 146 includes a screw fixing bracket 11, to which the plug sliding door cross beam profile 12 is fixedly connected, and the screw fixing bracket 11 is connected with a screw 16 through a bearing, and the screw 16 is connected to the motor reducer 32 through a transmission mechanism 14, and the cylinder of the motor reducer 32 is fixed on the motor fixing bracket 15, and the motor fixing bracket 15 is fixedly connected to the plug sliding door cross beam profile 12; the screw 16 is sleeved with a screw nut 35, and the screw nut 35 is fixedly connected to the slide cylinder assembly 23, specifically, the screw nut 35 is fixedly connected to the connecting rod connecting bolt 7 in the slide cylinder body 231. In this way, the motor reducer 32 is actuated to drive the screw 16 to rotate, so that the screw nut 35 is translated along the axial direction of the screw 16, and then the slide cylinder assembly 23 is translated.

[0035] like Figure 6As shown, at the left and right ends of the sliding door crossbeam profile 12, the rocker arm assemblies 6 are respectively connected by U-shaped clips 24. The rocker arm assembly 6 includes a first rocker 61. The first end of the first rocker 61 is connected to the U-shaped clip 24 through a first hinge shaft. The other end of the first rocker 61 is provided with a third hinge shaft 63, and the third hinge shaft 63 is connected to the fixed frame module 46. Therefore, the third hinge shaft 63 can only rotate in the fixed frame module 46 and cannot be displaced. For the rocker arm assembly 6 on the right side, the middle part of the first rocker 61 on the right side is connected to the second rocker 62 through a hinge shaft. The other end of the second rocker 62 is provided with a through hole 64, and the through hole 64 is connected to the pin shaft of the right hanging plate 21 through a hinge shaft. For the rocker arm assembly on the left side, the middle part of the first rocker 61 on the left side is connected to one end of the second rocker 62 through a hinge shaft. The other end of the second rocker 62 is provided with a through hole 64, and the through hole 64 is connected to the pin shaft of the left hanging plate 20 through a hinge shaft. The bottom of the left hanging plate 20 is hinged to the door shaft 81 through the other end of the connecting rod 68. The first rockers 61 of the left rocker arm assembly and the first rockers 61 of the right rocker arm assembly form a parallelogram structure to achieve the synchronization of the left hanging plate 20 and the right hanging plate 21 in the Y direction when rotating in the carriage module 210, as Figure 12 and Figure 13 shown in the position states of opening and closing the door.

[0036] It should be noted that the second rocker 62 can be an aluminum connecting rod.

[0037] such as Figure 5 、 Figure 9 、 Figure 10 、 Figure 11As shown in the figure, the motor reducer 32 transmits the output rotational force to the lead screw 16 through the transmission mechanism 14 (synchronous belt). By adjusting the position of the motor reducer 32, the belt tightness can be adjusted to ensure efficient transmission of the motor torque to the lead screw 16. The rotation of the lead screw 16 drives the lead screw nut 35 to translate. The lead screw nut 35 is fixedly connected to the sliding cylinder assembly 23, and the translation of the lead screw nut 35 drives the sliding cylinder assembly 23 to translate. Since the carrying door frame rotating plate 8 is provided at the bottom of the sliding cylinder assembly 23, the carrying door frame 122 is connected through the carrying door frame rotating plate 8, and the carrying door frame 122 is connected to the door panel 91, thereby realizing the movement of the door panel 91. However, only the translational movement of the door panel 91 is achieved above, and the plug and slide composite movement of the door panel 91 requires the action of the rocker arm assembly 6. While the sliding cylinder assembly 23 is translating (in the X-axis direction), the guide bearing 10 on the sliding cylinder assembly 23 runs in the track guide plate 43 (track groove 431) on the fixed frame module 46 to ensure that the sliding cylinder assembly 23 moves along the designed running track. Since the running track is arc-shaped, it forces the sliding cylinder assembly 23 not only to translate but also to have a certain displacement in the Y direction. Since the motor reducer 32 is continuously rotating, the sliding cylinder assembly 23 will exert a reaction force on the motor fixing bracket 15. In this way, the reaction force drives the motor reducer 32, the lead screw 16, the plug and slide door crossbeam profile 12, and the rocker arm assemblies 6 at both ends to move in the Y direction. In the above process, the third hinge shaft 63 in the rocker arm assembly 6 cannot translate. Therefore, the other end of the first rocker 61 will swing. With the drive of the first rocker 61, the second rocker 62 hinged in the middle of the first rocker 61 will also swing. Therefore, the other end of the second rocker 62 will also swing. The specific action states are as Figure 7 , Figure 8 shown. The rocker arm assemblies 6 on both sides adopt a parallelogram structure, which has two functions. One is to ensure that the motor reducer 32 realizes the plug action, and the other is to ensure the synchronous operation of both ends of the carriage module 210. In this way, it is ensured that the carriage module 210 realizes the plug and slide action and ensures the synchronous plug and slide of the carriage module 210, avoiding the problems caused by the non-synchronization of both ends.

[0038] Such as Figure 12 , Figure 13As shown, the driving connecting rod module 146 needs to ensure that the door can be opened and closed normally. When the door is closed, it cannot open suddenly. To achieve this function, this case adopts the dead point theory of the crank connecting rod and the slider. When the trajectory of the crank connecting rod and the slider stroke is in a straight line; at this time, the two axes of the connecting rod and the center of the crank rotation are in a straight line, that is, two dead points are formed; one point of the two dead points is 0°, and the other point is 180°; due to structural requirements, this case uses the 0° dead point position, and uses a section of the running trajectory. At the same time, considering that the acceleration in the vehicle height direction when the vehicle is running is obviously higher than the acceleration in the other two directions, so when we use the dead point of the crank slider, we must avoid the acceleration direction and the running direction in the same direction, so that the unlocking problem caused by the vehicle bumping can be effectively eliminated. It can be seen that the vehicle bumps mainly in the vehicle height direction, and the direction with greater acceleration is also mainly in this direction, so the running direction of our connecting rod mechanism cannot be arranged in the vehicle height direction, but in the horizontal direction. Figure 12 Figure 13 In the figure, point C is the axis of the third hinge shaft 63, and the slide module 210 is the slider A in the mechanism motion diagram. The moving distance of the slider A is the length of the oblong hole 42; the line segments BC and AB in the figure are the rockers in the rocker assembly 6. At this time, during the rotation of the crank, the slider makes a straight reciprocating motion. When the trajectory of the crank connecting rod and the slider stroke is in a straight line; at this time, the two axis centers of the connecting rod and the center of the crank rotation are in a straight line, forming a dead point position, that is, the door closing position. When opening the door, the crank connecting rod rotates to drive the slider to move. In order to ensure that the door does not interfere with the body skin during the translation stage, the effective stroke of the mechanism is required to reach 65mm. In order to ensure that the two ends of the slide module 210 perform the plug-pull action at the same time, two sets of connecting rods are used and a parallelogram structure is formed through the plug-pull door crossbeam profile 12 to ensure that the running trajectories of the two sets of crank connecting rods are consistent.

[0039] Furthermore, the lead screw nut 35 is connected to the lead screw nut support 31, and the lead screw nut 35 needs a certain margin in the process of connecting with the slide assembly 23, because the movement of the lead screw nut 35 and the running track of the slide body 231 should theoretically remain parallel, but often the mechanism has more or less deformation and processing errors, so it is necessary for the lead screw nut 35 and the slide body 231 to have a certain amount of floating. When the mechanism is deformed, it will not cause the lead screw 16 and the lead screw nut 35 to get stuck. By adding the lead screw nut support 31, the above problems can be effectively solved to ensure the smoothness and stability of the transmission.

[0040] Furthermore, if Figure 2As shown in the figure, a limit block 26 is provided on the left side of the fixed frame module 46, and a proximity switch 30 is provided at the top right side of the fixed frame module 46. The position of the limit block 26 is the stop position after the driving link module 146 rotates 7° after passing through the mechanical dead point. At the same time, the proximity switch 30 triggers a signal for canceling the anti-pinch function of a car door to be in place. At this time, the anti-pinch signal in the door panel is automatically canceled, preventing the situation that the door cannot be closed due to accidental touch of the anti-pinch function. At the same time, it can also solve the problem of having an anti-pinch function within 30 mm, avoiding pinching people during the door closing process.

[0041] Furthermore, an emergency unlocking module 50 is provided in the driving link module 146. The emergency unlocking module 50 includes an unlocking spring 49. One end of the unlocking spring 49 is fixed on the unlocking fixing frame 38, and the unlocking fixing frame 38 is fixedly arranged on the fixed frame module 46. The other end of the unlocking spring 49 is connected to the output shaft of the unlocking cylinder 40, and the cylinder body of the unlocking cylinder 40 faces the carriage module 210. Under normal circumstances, the unlocking cylinder 40 compresses the unlocking spring 49 to store energy in the unlocking spring 49. When an emergency occurs, people can quickly evacuate from the vehicle to the outside of the vehicle. The emergency unlocking device is mainly used to open the car door when the vehicle has no electricity or air, and at the same time, it is necessary to avoid the situation that the car door is opened due to human misoperation during the whole vehicle driving process. When an emergency scenario occurs, people unlock the pre-tightened unlocking spring 49. Under the action of the unlocking spring 49, the unlocking cylinder 40 pops out and pushes the carriage module 210 to move for unlocking. At this time, the unlocking spring 49 pushes the crank-link mechanism past the dead point position under the action of the elastic force, realizing the unlocking of the car door. At this time, people only need to gently push the car door outwards to open the door, realizing the evacuation from the inside of the vehicle to the outside of the vehicle.

[0042] As Figure 14 shown in the figure, the door panel assembly includes a door panel 91. The door panel 91 is connected with a door shaft 81. The door shaft 81 is connected to the pin shaft at the lower part of the left hanging plate 20 of the carriage module 210 through a connecting rod 68, transmitting the Y-direction movement of the carriage module 210 to the lower side of the door panel to realize the synchronous Y-direction movement of the upper and lower parts of the door panel; and the door panel 91 is also connected to the sliding cylinder assembly 23 through a door carrier 122. When the carriage module 210 moves in the in-out direction of the vehicle, the force is transmitted to the door shaft 81 through the connecting rod 68, and the door shaft 81 transmits the rotational force to the lower edge of the door panel. When the carriage module 210 moves at the top, it drives the lower edge of the door panel to run synchronously, thus realizing the function of integral locking.

[0043] A door panel limit block 27, a height limit block 28, and a lateral limit block 29 are provided at the lower part of the door panel 91. These three limit blocks respectively ensure the positions of the car door in the X-axis, Y-axis, and Z-axis directions when the door is in the closed position. At the same time, when the vehicle has large bumps, it largely absorbs the abnormal noise caused by vibration.

[0044] Further, a door lock 1 is installed on the door panel 91, and the door lock 1 is connected to the door controller.

[0045] As Figure 14 shown, a rubber strip 33 is installed on the door panel column profile of the door panel 91, which overlaps with the door frame rubber strip in the closed door state to play a sealing role. At the same time, a sensitive metal strip is installed in the cavity in the middle of the rubber strip 33. When there is an obstacle in the closed door state, the rubber strip deforms, triggering the anti-pinch function of the door controller, and the car door switches from the closed state to the open state to prevent the risk of pinching.

[0046] At the same time, the system includes a door controller, which realizes the functional logic of the entire system according to the functional requirements, making the door system stable, safe and reliable during operation; and can optimize the key data of the operation process according to the operating environment and operation history information to reduce the failure rate of the system.

[0047] The operation process and state of the mechanism of the present invention: 1. Electric door opening: The door controller sends an opening signal to the motor reducer 32. The motor reducer 32 drives the lead screw 16 to rotate through a belt. The rotation of the lead screw 16 drives the lead screw nut 35 to move. At the same time, the lead screw nut 35 is connected to the sliding cylinder assembly 23. In this way, the sliding cylinder assembly 23 runs driven by the lead screw nut 35. The guide bearing 10 on the sliding cylinder assembly 23 runs in the track guide plate 43 on the fixed frame module 46 to ensure that the sliding cylinder assembly 23 moves along the designed running track. When the sliding cylinder assembly 23 cannot run due to the force in the front and rear directions of the vehicle, the motor reducer 32 drives the rocker arm assembly 6 in the drive link module 146 to move. At this time, the movement of the drive link module 146 drives the sliding frame module 210 to move outward from the vehicle. At this time, the car door begins to open outward from the vehicle. When the drive link module 146 runs to the limit position, the car door no longer moves outward from the vehicle, and the lead screw nut 35 continues to run. The sliding cylinder assembly 23 begins to perform translational movement, and the car door moves in the front and rear directions of the vehicle, realizing the opening of the car door. The motor reducer 32 calculates the position of the car door operation through an encoder. When an obstacle appears, the anti-pinch function is activated, and the car door will stop opening and remain in that state.

[0048] 2. Electric door closing: The door controller sends a door closing signal to the motor reducer 32. The motor reducer 32 drives the lead screw 16 to rotate reversely through the belt. The rotation of the lead screw 16 drives the lead screw nut 35 to move. At the same time, the lead screw nut 35 is connected to the sliding cylinder assembly 23. In this way, the sliding cylinder assembly 23 runs driven by the lead screw nut 35. The guide bearing 10 on the sliding cylinder assembly 23 runs in the track guide plate 43 on the fixed frame module 46 to ensure that the sliding cylinder assembly 23 moves along the designed running track. When the sliding cylinder assembly 23 is unable to run due to the force in the vehicle interior and exterior direction, the motor reducer 32 drives the door panel 91 to move horizontally. When the sliding cylinder assembly 23 is unable to run due to the force in the vehicle front and rear direction, the rocker arm assembly 6 in the drive link module 146 starts to move. At this time, the movement of the drive link module 146 drives the carriage module 210 to move towards the vehicle interior direction. At this time, the door starts to close towards the vehicle interior. When the rocker arm assembly 6 runs to the dead point position, the door no longer moves towards the vehicle interior. The lead screw nut 35 continues to run, and the link rocker arm no longer rotates under the action of the limit block, and the door is completely closed. When the motor reducer 32 loses power, the motor reducer 32 calculates the running position of the door through the encoder. When an obstacle appears, the anti-pinch function is activated, the door will stop closing, and then execute the opening, and then execute the closing again until the door is completely closed.

[0049] 3. Manual door opening: When the door is in the locked state, by operating the emergency valve inside or outside the vehicle, the emergency unlocking device 50 pops out at this time. The unlocking spring 49 pushes the unlocking cylinder 40, so that the cylinder body of the unlocking cylinder 40 pushes the carriage module 210, thereby enabling the drive link module 146 to pass through the dead point position and opening the door by a finger gap. The person inside the vehicle pushes the door panel 91 to move towards the outside of the vehicle. The sliding cylinder assembly 23 drives the lead screw nut 35 to move passively. At the same time, the lead screw 16 rotates forward, and the motor reducer rotates forward passively. The emergency unlocking device 50 triggers the door controller that the door is in the emergency state.

[0050] 4. Manual door closing: The person pushes the door panel 91 or pulls the door frame 122 inside the vehicle to move towards the vehicle interior. At this time, the door panel 91 drives the sliding cylinder assembly 23 to start moving. The sliding cylinder assembly 23 drives the carriage module 210 to change from the horizontal movement direction to the movement towards the vehicle interior, and synchronously drives the drive link module 146 to rotate reversely, enabling the drive link module 146 to pass through and reach the dead point position, and the link reaches the limit position. At this time, the lead screw nut 35 moves passively. At the same time, the lead screw 16 rotates reversely, and the motor reducer rotates reversely passively. At the same time, it triggers that the door is in the closed state.

[0051] The present invention adopts a double optical bar structure, and an integral locking structure can also be adopted under the condition of meeting the length requirements. The locking mechanism adopts a planar mechanical locking method, with a simple structure, light weight, and high reliability, and can ensure that unlocking does not occur during the vehicle's bumpy process. The emergency unlocking mechanism adopts a simple wire-pulling method or a cylinder ejection method to ensure quick escape in case of emergency. It avoids problems such as poor reliability, heavy weight, and difficult control caused by the complex mechanical structure of the emergency mechanism. This mechanism can meet the requirements of various bus models, with a wider adaptability, and both reliability and safety can meet the requirements.

[0052] The above are only the preferred embodiments of the present invention. It should be noted that for those skilled in the art, without departing from the overall concept of the present invention, several changes and improvements can still be made, and these should also be regarded as the protection scope of the present invention.

Claims

1. A single-leaf large-opening plug door system, characterized in that: It includes a door panel (91) and a fixed frame module (46) fixed to the vehicle body. A carriage module (210) is slidably arranged on the fixed frame module (46); the door panel (91) is connected to a sliding cylinder assembly (23) through a door carrier (122), and the sliding cylinder assembly (23) is slidably arranged on the carriage module (210); and the sliding cylinder assembly (23) is connected to a driving link module (146), and the driving link module (146) drives the sliding cylinder assembly (23) to move; a rocker arm assembly (6) is arranged in the driving link module (146), the rocker arm assembly (6) is connected to a door shaft (81) through a link (68), and the door panel (91) is connected to the door shaft (81).

2. The single-leaf large-opening plug door system according to claim 1, characterized in that: Long circular holes (42) are arranged on both the left and right sides of the fixed frame module (46), and the two ends of the carriage module (210) achieve Y-direction sliding in the long circular holes (42); and a track guide plate support (45) is arranged on the inner side of the fixed frame back plate of the fixed frame module (46), a track guide plate (43) is arranged on the front side of the track guide plate support (45), a track groove (431) is arranged in the track guide plate (43), the track groove (431) is an arc groove, and the carriage module (210) slides in the track groove (431) through a guide bearing (10).

3. The single-leaf large-opening plug door system according to claim 2, characterized in that: The carriage module (210) includes a first guide optical bar (2) and a second guide optical bar (3). The first guide optical bar (2) and the second guide optical bar (3) are arranged in parallel. The left ends of the first guide optical bar (2) and the second guide optical bar (3) are jointly connected to a left hanging plate (20), and the right ends of the first guide optical bar (2) and the second guide optical bar (3) are jointly connected to a right hanging plate (21); rolling bearings (4) are respectively arranged at both ends of the first guide optical bar (2) and the second guide optical bar (3), and the rolling bearings (4) at both ends are respectively arranged to roll in the long circular holes (42) of the fixed frame module (46); a sliding cylinder assembly (23) is slidably arranged on the first guide optical bar (2) and the second guide optical bar (3).

4. A single-leaf large-opening plug door system according to claim 2, characterized in that: The sliding cylinder assembly (23) includes a sliding cylinder body (231). Two through holes are arranged in the sliding cylinder body (231), and at least two linear bearings (232) are arranged in each through hole. The two guide optical bars are arranged on the two linear bearings (232). At least one link connection bolt (7) is arranged on the side of the sliding cylinder body (231), and the sliding cylinder body (231) is connected to the driving link module (146) through the link connection bolt (7). A guide wheel fixing frame (9) is arranged on the top of the sliding cylinder body (231), and a guide bearing (10) is arranged on the guide wheel fixing frame (9).

5. A single-leaf large-opening plug door system according to claim 4, characterized in that: The bottom of the sliding cylinder body (231) is connected to a door carrier rotating plate (8) through a pin shaft (18), the door carrier rotating plate (8) is connected to a door carrier (122), and the door carrier (122) is connected to a door panel (91).

6. The single-leaf large-opening plug and slide door system according to claim 1, characterized in that: The described drive link module (146) includes a lead screw fixing bracket (11). A sliding door crossbeam profile (12) is fixedly connected to the lead screw fixing bracket (11). A lead screw (16) is connected to the lead screw fixing bracket (11) through a bearing. The lead screw (16) is drivingly connected to a motor reducer (32) through a transmission mechanism. The cylinder block of the motor reducer (32) is fixed to a motor fixing bracket (15). The motor fixing bracket (15) is fixedly connected to the sliding door crossbeam profile (12). A lead screw nut (35) is sleeved on the lead screw (16). The lead screw nut (35) is fixedly connected to a sliding cylinder assembly (23). The left and right ends of the sliding door crossbeam profile (12) are respectively connected to a rocker arm assembly (6) through U-shaped clips (24).

7. The single-leaf large-opening plug door system according to claim 6, wherein: The rocker arm assembly (6) includes a first rocker (61). The first end of the first rocker (61) is connected to the U-shaped clip (24) through a first hinge shaft. The other end of the first rocker (61) is provided with a third hinge shaft (63). The third hinge shaft (63) is connected to a fixed frame module (46). The middle of the first rocker (61) is connected to one end of a second rocker (62) through a second hinge shaft. The other end of the second rocker (62) is provided with a through hole (64). The through hole (64) is connected to a connecting rod (68) through a fourth hinge shaft. The other end of the connecting rod (68) is hinged to a door shaft (81).

8. A single-leaf large-opening plug and slide door system according to claim 6, characterized in that: The lead screw nut (35) is connected to a lead screw nut support (31).

9. A single-leaf large-opening plug door system according to claim 6, characterized in that: An emergency unlocking module (50) is provided in the drive link module (146). The emergency unlocking module (50) includes an unlocking spring (49). One end of the unlocking spring (49) is fixed to an unlocking fixing bracket (38). The unlocking fixing bracket (38) is fixedly arranged on the fixed frame module (46). The other end of the unlocking spring (49) is connected to the output shaft of an unlocking cylinder (40). The cylinder block of the unlocking cylinder (40) faces the carriage module (210).

10. A single-leaf large-opening plug door system according to claim 1, characterized in that: The fixed frame module (46) includes a left bracket (22) and a right bracket (34). A fixed frame back plate and a wire groove support (39) are arranged between the left bracket (22) and the right bracket (34). The left bracket (22), the right bracket (34), the fixed frame back plate and the wire groove support (39) together enclose a rectangular frame; Adjusting plates (44) are connected to the bottoms of the left bracket (22) and the right bracket (34). Adjusting holes are provided on the adjusting plates (44). The right bracket (34) is fastened to the vehicle body through front and rear adjusting bolts (41) and anti-backlash washers (5). High and low adjusting bolts are provided on the adjusting plates (44).

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