Passenger door of a bus and installation method thereof

Abstract

The present invention relates to the technical field of passenger doors for buses, and discloses a passenger door for a bus and a method for installing the same, comprising a bus body and two doors, both of which are provided with rubber edges around them, the two doors being respectively installed in a frame of the bus body via two parallel opening and closing assemblies, the inner side of the bus body being provided with a driving assembly for driving the movement of the parallel opening and closing assemblies, the inner side of the bus body being provided with a positioning assembly for positioning the opening and closing positions of the two doors, the positioning assembly comprising a magnetic positioning mechanism and a photoelectric positioning mechanism. The present invention achieves a primary seal between the two doors and the bus body via the rubber edges, and then achieves a secondary seal between the two doors and the bus body via the secondary sealing assembly, thereby achieving not only waterproof and dustproof properties but also preventing heating or cooling air inside the bus body from leaking out, and achieving a violent removal operation of the doors via the top material assembly and the destructive assembly, and enabling the doors to be opened manually, thus providing increased safety.

Description

Technical Field

[0001] The present invention relates to the technical field of bus passenger doors, in particular to a bus passenger door and an installation method thereof. Background Art

[0002] The passenger door of a bus is the core channel for passengers to get on and off the bus. Its design directly affects the safety, comfort and operational efficiency of the vehicle. Most existing buses use double-leaf passenger doors that open inward.

[0003] A search revealed Chinese patent publication number CN2513812Y, which discloses an improved opening and closing device for double-leaf passenger doors on buses. This device is installed beneath the second step inside the passenger door. Two opening and closing cylinders are connected to the vertical axis of the frame. The piston rods of the cylinders are connected to the tie rod connecting the frame to the passenger door and the balance bar. Above the passenger door, there is also a door connecting arm connected to a support arm within the upper door frame via a pivot. This passenger door opening and closing device is located completely behind the passenger door, making it easy to open and close the door and ensuring the airtightness of the passenger door. However, the following problems still exist during use:

[0004] 1. Due to the inherent characteristics of the mechanical linkage door structure, there is inevitably some deviation between the two doors when closing. Even with a sealing ring installed between the door and the body, its sealing performance is still limited.

[0005] 2. When encountering an accident or sudden power outage, the car door is often difficult to open easily, which will undoubtedly significantly reduce the passengers' probability of escape and pose a potential threat to their life safety. Summary of the Invention

[0006] In response to the shortcomings of the existing technology, the present invention provides a passenger door for a bus and an installation method thereof, mainly to solve the problem that due to the inherent characteristics of the mechanical linkage opening and closing door structure, there is inevitably a deviation between the two doors when closing. Even if a sealing ring is set between the door and the body, its sealing performance still has certain limitations. When encountering an accident or sudden power outage, the door is often difficult to open easily, which will undoubtedly significantly reduce the probability of passengers' escape and pose a potential threat to the passengers' life safety.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A passenger door for a bus comprises a bus body and two doors, both of which are provided with rubber edges on all sides, the two doors being respectively installed in a frame of the bus body via two parallel opening and closing assemblies, the inner side of the bus body being provided with a driving assembly for driving the parallel opening and closing assemblies to move, the inner side of the bus body being provided with a positioning assembly for positioning the opening and closing positions of the two doors, the positioning assembly comprising a magnetic positioning mechanism and a photoelectric positioning mechanism, the inner side of the bus body being provided with a lifting assembly for quickly disengaging the driving assembly from the parallel opening and closing assembly, and the outer sides of the two doors being provided with a secondary sealing assembly for performing a secondary seal between the door and the bus body.

[0009] As a further solution of the present invention, the parallel opening and closing assembly includes two groups of upper bearing seats and bearing seats with blind plates fixedly connected to the inner side of the vehicle body, and a rotating shaft is provided between the two opposite upper bearing seats and bearing seats with blind plates. Two swing arms are fixedly connected to one side of the rotating shaft, and one end of the two swing arms is rotatably connected to the vehicle door through a stainless steel universal ball head. The top and bottom of the two doors are rotatably connected to connecting arms through stainless steel universal ball heads, and the end of the connecting arm is rotatably connected to the vehicle body through a stainless steel universal ball head.

[0010] As a further solution of the present invention, the driving assembly includes a base frame fixedly connected to the inner side of the vehicle body, a transverse guide rail is fixedly connected to the inner wall of one side of the base frame, a two-way threaded rod is rotatably connected to the inside of the base frame through a bearing, one side of the two-way threaded rod is threadedly connected to two threaded platforms slidably connected to the transverse guide rail, and two groups of transverse light rods are respectively installed on the inner side of the vehicle body through two groups of vertical fixed seats, and the two groups of transverse light rods are slidably connected to racks through slides, and the two racks are respectively fixed to the two threaded platforms through two connecting plates, and a servo motor for driving the two-way threaded rod to rotate along the axial direction is provided on one side of the base frame, and the top ends of the two rotating shafts are provided with gears through key slots, and the gears are meshed with the racks.

[0011] As a further solution of the present invention, the top material assembly includes four groups of vertical polished rods fixed to the inner side of the vehicle body through four groups of vertical fixing seats, and the two adjacent groups of vertical polished rods are slidably connected to the vertical slides through the slide, and a lifting polished rod is fixedly connected between the two vertical slides, and one side of the lifting polished rod is fixedly connected to the lifting handle, wherein one side of the two vertical slides is fixedly connected to the top material mounting frame, and the bottom ends of the two gears are fixedly connected to the connecting cylinder, and the circumferential outer wall of the connecting cylinder is provided with an annular groove, and a retaining ring is sleeved in the annular groove, and one side of the retaining ring is fixed to the two top material mounting frames through two connecting rods.

[0012] As a further solution of the present invention, the photoelectric positioning mechanism includes a slot-type photoelectric switch 1 and a slot-type photoelectric switch 2 fixedly connected to one side of the base frame, wherein the top of one of the threaded tables is fixedly connected to an induction frame that cooperates with the slot-type photoelectric switch 1 and the slot-type photoelectric switch 2, and the magnetic positioning mechanism includes two rectangular electromagnet suction cups fixedly connected to the inner side of the vehicle body, one side of the two connecting plates is fixedly connected to a positioning mounting frame, and one side of the positioning mounting frame is fixedly connected to an iron plate that cooperates with the rectangular electromagnet suction cup.

[0013] As a further solution of the present invention, the secondary sealing assembly includes a pressure frame 1 and a pressure frame 2 respectively arranged on the outer sides of the two vehicle doors, and the inner sides of the pressure frame 1 and the pressure frame 2 are each provided with two groups of sealing rings, and the two groups of sealing rings are respectively in contact with the vehicle door and the vehicle body, and the adjacent sides of the pressure frame 1 and the pressure frame 2 are each provided with a pressure groove that cooperates with each other, and the top corner position of the pressure groove is fixedly connected with a sealing strip, and the four inner corners of the two vehicle doors are fixedly connected with a push-pull electromagnet, one end of the push-pull electromagnet push rod passes through the vehicle door and is respectively fixed to the pressure frame 1 and the pressure frame 2, and the other end of the push-pull electromagnet push rod is fixedly connected with a positioning iron block, and the four inner corners of the two vehicle doors are provided with a through hole for avoiding the positioning iron block, and a mounting sleeve is fixedly connected in the through hole, and a circular electromagnet suction cup that cooperates with the positioning iron block is fixedly connected in the mounting sleeve, and a sealing gasket is provided at the contact position between the push-pull electromagnet push rod and the vehicle door.

[0014] As a further solution of the present invention, it also includes two groups of destructible components arranged on the inside of the vehicle body, the destructible components include an upper destructible mounting seat and a lower destructible mounting seat installed on the inside of the vehicle body, the rotating shaft is arranged inside the upper destructible mounting seat and the lower destructible mounting seat, the bottom of the lower destructible mounting seat is provided with a lower limit plate for supporting the bottom end of the rotating shaft, the upper destructible mounting seat and the lower destructible mounting seat both include an inner fixing seat fixedly connected to the inside of the vehicle body, and limiting slide grooves are provided on both sides of the inner fixing seat, and an outer slide seat is slidably connected between the two limiting slide grooves. A mounting cavity is formed between the inner fixed seat and the outer sliding seat, and a mounting bearing is provided in the mounting cavity to limit the rotating shaft, and the bottom of the outer sliding seat is an opening structure for avoiding the mounting bearing, and top grooves are provided on both sides of the outer sliding seat, and a destructible fixing mechanism is provided between the inner fixed seat and the outer sliding seat, and one side of the two vertical slides is fixedly connected with a lifting plate, and the end of the lifting plate is fixedly connected with two lifting blocks that can contact the top groove, and the top of the lifting block is provided with a lifting slope, and an auxiliary force mechanism for destroying the destructible fixing mechanism is provided on the inner side of the vehicle body.

[0015] As a further solution of the present invention, the destructible fixing mechanism includes semicircular grooves on both sides of the inner fixed seat and the outer sliding seat, and pin rods are clamped in the semicircular grooves on both sides of the inner fixed seat and the outer sliding seat. Both sides of the inner fixed seat and the outer sliding seat are fixedly connected with cast iron brackets for limiting the position of the pin rods, and the stress concentration side of the cast iron bracket is provided with an induced fracture groove, and the induced fracture groove is a V-shaped structure.

[0016] As a further solution of the present invention, the auxiliary force mechanism includes an upper fixed iron block and a lower fixed iron block fixedly connected to the outer side of the circumference of the lifting rod, and a slide driven by a lifting handle is sleeved on the outer side of the circumference of the lifting rod and between the upper fixed iron block and the lower fixed iron block. The top end of the slide is fixedly connected to an impact iron block that can contact and collide with the upper fixed iron block, and the bottom end of the slide is fixedly connected to a magnetic ring that can generate magnetic attraction with the lower fixed iron block.

[0017] A method for installing a passenger door of a bus comprises the following steps:

[0018] S1: During installation, first install the base frame, rectangular electromagnet suction cup, and multiple sets of transverse polished rods on the inside of the vehicle body with screws. Then, install the connecting plate and threaded table, positioning mounting frame, and rack with screws. Now install multiple internal fixing seats on the inside of the vehicle body with screws. Then, clamp the rotating shaft inside the internal fixing seat through the mounting bearing. Then, clamp the external sliding seat on the internal fixing seat and limit the mounting bearing. At this time, clamp the pin rod in the semicircular slot and limit it with the cast iron clamp.

[0019] S2: Then install the vertical polished rod and vertical slide on the inner side of the vehicle body respectively, and then install the fixed iron block, impact iron block, slide cylinder, magnetic ring and lower fixed iron block on the lifting polished rod in sequence, and then install the lifting polished rod between the two vertical slides. At this point, the preliminary installation is completed;

[0020] S3: Then assemble the door. First, install the secondary sealing assembly to the outside of the door and stick the sealing strip and sealing ring. Then, fix and connect the rubber edge on the outside of the door. Then, install the stainless steel universal ball joint on the inside of the door and connect it to the swing arm and connecting arm respectively through the stainless steel universal ball joint. The other end of the connecting arm is connected to the inner side of the car body through the stainless steel universal ball joint. At this point, the entire door installation is completed.

[0021] S4: When the car door is in use, the opening and closing position of the car door is determined by the cooperation between the induction frame and the slot-type photoelectric switch 1 and the slot-type photoelectric switch 2. Then, by starting the servo motor, the servo motor rotates to cause the bidirectional threaded rod to drive the two threaded tables to move toward both ends along the transverse guide rails. At this time, the two threaded tables drive the two racks to move outward along the transverse light rods respectively through the two connecting plates. Since the racks are engaged with the gears, the gears rotate through the key slots to drive the rotating shaft to rotate. The rotating shaft rotates through the two swing arms and the cooperation of the two connecting arms to drive the car door to flip outward. Due to the arrangement of the two connecting arms, the vibration of the car door during the outward swing is reduced and more stable.

[0022] S5: When the door is closed, the servo motor is started and the servo motor reverses to realize the inward flipping and closing of the door. At this time, the rectangular electromagnet suction cup is started, and the rectangular electromagnet suction cup generates magnetic force and magnetically fixes the iron plate, thereby locking the door in the closed position;

[0023] S6: After the two doors are closed, the push-pull electromagnets at the four corners of the first pressing frame are simultaneously activated, and the push rods of the push-pull electromagnets move backward, driving the first pressing frame to move inward, and making the two sets of sealing rings provided in the first pressing frame contact the door and the body respectively. At this time, the push-pull electromagnets at the four corners of the second pressing frame are activated again, making the two sets of sealing rings provided in the second pressing frame contact the door and the body respectively. At this time, the circular electromagnet suction cup is activated to magnetically fix the positioning iron block provided at the rear end of the push rod of the push-pull electromagnet. At the same time, the pressure grooves on the adjacent sides of the first pressing frame and the second pressing frame overlap with each other, and the top corners are sealed by the sealing strip, thereby completing the secondary sealing operation between the two doors and the body.

[0024] S7: When an accident or power failure occurs in a passenger car, the lifting handle is quickly pulled upward, and the lifting handle drives the slide to move upward quickly, and collides with the upper fixed iron block by hitting the iron block. At this time, the upper fixed iron block drives the lifting rod to move upward quickly under the dual forces of tension and inertia. At this time, the vertical slide drives the lifting block to move upward. At this time, the lifting slope opened at the top of the lifting block applies force to the pin rod, forcing the pin rod to disengage from the semicircular groove and apply force to the cast iron bracket. At this time, the stress concentration edge of the cast iron bracket is subjected to force and breaks from the induced fracture groove. The pin rod disengages from the semicircular groove, thereby releasing the fixed state between the inner fixed seat and the outer sliding seat, and then the ejector block continues to move upward and applies an upward force to the outer sliding seat through the ejector groove, so that the outer sliding seat slides upward and quickly disengages from the inner fixed seat. At the same time, through the ejector mounting bracket and the retaining ring, the gear moves upward and completes the disengagement operation from the rotating shaft and the keyway, thereby realizing the violent dismantling of the outer sliding seat, and releasing the fixed installation state of the rotating shaft, and breaking one of the fixed parts of the car door. At this time, the car door can be opened freely within a certain range to facilitate passengers to escape from the car.

[0025] Compared with the prior art, the present invention provides a passenger door for a bus and an installation method thereof, which has the following beneficial effects:

[0026] 1. The present invention realizes parallel opening of two doors by driving the parallel opening and closing assembly through the driving assembly. Not only does it open and close stably and at a uniform speed, but it also does not occupy vertical space inside or outside the vehicle, forming an almost complete opening. This allows passengers to get on and off the vehicle without having to avoid the door's moving path, making it particularly convenient for passengers carrying luggage, strollers, or in wheelchairs to pass quickly, thereby improving boarding and alighting efficiency and reducing the risk of congestion. In addition, the present invention has fewer parts and fewer failure points, making it easier to inspect and replace parts during daily maintenance. In addition, the manufacturing cost and subsequent maintenance cost are lower than those of complex folding doors, making it suitable for high-frequency use.

[0027] 2. The present invention realizes the primary sealing between the two doors and the vehicle body through the rubber edge, and then realizes the secondary sealing between the two doors and the vehicle body through the secondary sealing component, which is not only waterproof and dustproof, but also prevents the heating or cooling air inside the vehicle body from leaking out.

[0028] 3. The present invention realizes the disengagement operation of the driving component and the parallel opening and closing component through the lifting component, and enables the door to be opened manually, which is safer.

[0029] 4. The present invention determines the opening and closing position of the vehicle door by cooperating with the sensing frame and the slot-type photoelectric switch 1 and the slot-type photoelectric switch 2, and generates magnetic force through the rectangular electromagnet suction cup to magnetically fix the iron plate, thereby locking the vehicle door in the closed position. In addition, when a fault occurs and the power is cut off, the magnetic force of the rectangular electromagnet suction cup disappears, thereby not affecting the manual opening operation of the vehicle door.

[0030] 5. The present invention drives the lifting rod and the vertical slide to move upward along the vertical rod by moving the lifting handle upward, so that the gear is completely disengaged from the rotating shaft and the keyway, thereby realizing the conversion of the car door from electric to manual opening, which is suitable for emergency situations such as power outages.

[0031] 6. The present invention uses a push-pull electromagnet to make the two sets of sealing rings provided on the pressing frame 1 and the pressing frame 2 contact the vehicle door and the vehicle body respectively in turn. At the same time, the pressing grooves opened on the adjacent sides of the pressing frame 1 and the pressing frame 2 overlap with each other, and the top corners are sealed by sealing strips, thereby completing the secondary sealing operation between the two vehicle doors and the vehicle body.

[0032] 7. The present invention adopts a destructive assembly consisting of a cast iron clamp and a pin rod. In an emergency, a force is applied to the pin rod through the top material slope, forcing the pin rod to disengage from the semicircular clamping groove and causing the cast iron clamp to break from the induced fracture groove, thereby releasing the fixed state of the outer slide. The design is ingenious, which can not only provide installation engagement during normal use, but also can be violently destroyed when needed.

[0033] 8. The present invention drives the slide to move upward rapidly by pulling the handle, and collides with the upper fixed iron block by hitting the iron block. At this time, the upper fixed iron block drives the lifting rod to move upward rapidly under the dual force of tension and inertia, thereby realizing the violent dismantling of the outer slide seat. The violent disassembly is easier, more suitable for violent dismantling operations by the weak, and safer.

[0034] 9. The present invention can effectively monitor and prevent people from being pinched by car doors by using an infrared sensor and a displacement sensor in combination. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the outer three-dimensional structure of a first embodiment of a passenger door for a bus proposed by the present invention;

[0036] Figure 2 This is a schematic diagram of the door structure of a passenger door for a bus according to a first embodiment of the present invention;

[0037] Figure 3 The present invention provides a passenger door embodiment of a bus Figure 2 Schematic diagram of the rear structure;

[0038] Figure 4 The present invention provides a passenger door embodiment of a bus Figure 3 A schematic diagram of the enlarged structure of part A;

[0039] Figure 5 The present invention provides a passenger door embodiment of a bus Figure 3 A schematic diagram of a partial cross-sectional structure;

[0040] Figure 6 The present invention provides a passenger door embodiment of a bus Figure 1 Schematic diagram of the inner three-dimensional structure;

[0041] Figure 7 This is a schematic structural diagram of a driving assembly of a first embodiment of a passenger door for a bus proposed by the present invention;

[0042] Figure 8 This is a structural schematic diagram of a magnetic positioning mechanism of a passenger door of a bus according to a first embodiment of the present invention;

[0043] Figure 9 This is a schematic structural diagram of a lift assembly of a passenger door for a bus according to a first embodiment of the present invention;

[0044] Figure 10 The present invention provides a passenger door embodiment of a bus Figure 9 Schematic diagram of the local explosion structure;

[0045] Figure 11This is a schematic diagram of the inner three-dimensional structure of a second embodiment of a passenger door for a bus proposed by the present invention;

[0046] Figure 12 This is a schematic diagram of the destructible assembly structure of a second embodiment of a passenger door for a bus proposed by the present invention;

[0047] Figure 13 This is a partially enlarged structural diagram of a destructible assembly of a second embodiment of a passenger door for a bus proposed by the present invention;

[0048] Figure 14 The second embodiment of the passenger door of a bus proposed by the present invention Figure 13 Schematic diagram of the explosion structure;

[0049] Figure 15 This is a schematic diagram of the cast iron bracket structure of a passenger door for a bus according to a second embodiment of the present invention;

[0050] Figure 16 This is a schematic structural diagram of a lower limit plate of a passenger door for a bus according to a second embodiment of the present invention;

[0051] Figure 17 This is a structural schematic diagram of the auxiliary force mechanism of a second embodiment of a passenger door for a bus proposed by the present invention.

[0052] In the figure: 1, vehicle body; 2, vehicle door; 201, rubber edge;

[0053] 3. Secondary sealing assembly; 301. Pressing frame 1; 302. Pressing frame 2; 303. Pressing groove; 304. Sealing strip; 305. Sealing ring; 306. Positioning iron block; 307. Push-pull electromagnet; 308. Mounting sleeve; 309. Round electromagnet suction cup;

[0054] 4. Drive assembly; 401. Servo motor; 402. Base frame; 403. Bidirectional threaded rod; 404. Connecting plate; 405. Threaded table; 406. Transverse guide rail; 407. Rack; 408. Transverse polished rod; 409. Gear; 410. Keyway;

[0055] 5. Parallel opening and closing assembly; 501. Upper bearing seat; 502. Rotating shaft; 503. Bearing seat with blind plate; 504. Stainless steel universal ball joint; 505. Swing arm; 506. Connecting arm;

[0056] 6. Magnetic positioning mechanism; 601. Positioning mounting frame; 602. Iron plate; 603. Rectangular electromagnet suction cup;

[0057] 7. Photoelectric positioning mechanism; 701. Induction frame; 702. Slot-type photoelectric switch 1; 703. Slot-type photoelectric switch 2;

[0058] 8. Ejector assembly; 801. Vertical polished rod; 802. Vertical slide; 803. Lifting handle; 804. Lifting polished rod; 805. Connecting rod; 806. Snap ring; 807. Connecting cylinder; 808. Ring groove; 809. Ejector mounting bracket; 810. Ejector block; 811. Ejector slope; 812. Ejector plate;

[0059] 9. Destructible assembly; 901. Upper destructible mounting seat; 902. Lower destructible mounting seat; 903. Internal fixing seat; 904. External slide seat; 905. Pin; 906. Top groove; 907. Limiting slide groove; 908. Semicircular retaining groove; 909. Mounting bearing; 910. Cast iron retaining bracket; 911. Fracture induction groove; 912. Lower limit plate;

[0060] 10. Auxiliary mechanism; 1001. Upper fixed iron block; 1002. Impact iron block; 1003. Slide; 1004. Magnetic ring; 1005. Lower fixed iron block. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0062] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or component being referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0063] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature. Example 1

[0064] Reference Figures 1-10 A passenger door for a bus includes a body 1 and two doors 2. The two doors 2 are provided with rubber edges 201 around them. The two doors 2 are respectively installed in the frame of the body 1 through two parallel opening and closing components 5. A plurality of infrared sensors are provided on the top of the body 1. A plurality of displacement sensors are provided in the rubber edges 201 of the contact edges of the two doors 2. A box body is provided on one side of the body 1. A single-chip microcomputer controller A and a single-chip microcomputer controller B are provided in the box body. The input end of the single-chip microcomputer controller A is connected to the infrared sensor through a wire. The infrared sensor component consists of a positioning screw, a positioning plate and an infrared sensor body. Therefore, when a human body is detected by the infrared sensor, When the vehicle is close to the vehicle, the single-chip controller A will control the vehicle door 2 to stop opening and closing, thereby playing the role of preventing people from being pinched. The input end of the single-chip controller B is connected to the displacement sensor through a wire. Therefore, when the vehicle door 2 pinches a person, the single-chip controller B will control the vehicle door 2 to stop opening and closing, thereby playing the role of preventing people from being pinched. The inner side of the vehicle body 1 is provided with a driving component 4 for driving the parallel opening and closing component 5 to move. The inner side of the vehicle body 1 is provided with a positioning component for positioning the opening and closing positions of the two vehicle doors 2. The positioning component includes a magnetic positioning mechanism 6 and a photoelectric positioning mechanism 7. The inner side of the vehicle body 1 is provided with a top material for quickly separating the driving component 4 from the parallel opening and closing component 5. Component 8, the outer side of the two doors 2 is provided with a secondary sealing component 3 for secondary sealing between the door 2 and the body 1, and the parallel opening and closing component 5 is driven by the driving component 4 to realize the parallel opening of the two doors 2. Not only is the opening range small, but the opening channel width is large, which is conducive to the passengers entering and exiting the channel, and the opening and closing speed is stable and uniform, without occupying the vertical space inside or outside the car, forming an almost complete opening, which makes it unnecessary for passengers to avoid the moving path of the door 2 when getting on and off the car, especially convenient for passengers carrying luggage, strollers or wheelchairs to pass quickly, improving the efficiency of getting on and off the car, and reducing the risk of congestion. In addition, there are fewer parts and the failure point is low. During daily maintenance, inspection and replacement of parts are required. It is more convenient, and its manufacturing cost and subsequent maintenance cost are lower than those of complex folding doors, and it is suitable for high-frequency use. Due to the use of a mechanical connecting rod structure, there is an error in the closing of the two doors 2, so that the initial sealing between the two doors 2 and the vehicle body 1 is achieved through the rubber edge 201, and then the secondary sealing component 3 is used to achieve the secondary sealing between the two doors 2 and the vehicle body 1. It is not only waterproof and dustproof, but also the heating or cooling air inside the vehicle body 1 is not easy to leak out. In the event of an accident or a power outage, the door 2 cannot be opened. Therefore, the driving component 4 and the parallel opening and closing component 5 can be disengaged through the top material component 8, and the door 2 can be opened manually, which is safer.

[0065] In order to solve the problem of stable opening and closing of the two car doors 2, the parallel opening and closing component 5 in the present invention includes two groups of upper bearing seats 501 and blind plate bearing seats 503 fixed to the inner side of the car body 1 by bolts, and a rotating shaft 502 is provided between the two opposite upper bearing seats 501 and the blind plate bearing seats 503. Two swing arms 505 are welded to one side of the rotating shaft 502. One end of the two swing arms 505 is rotatably connected to the car door 2 through a stainless steel universal ball head 504. The top and bottom of the two car doors 2 are rotatably connected to the connecting arm 506 through the stainless steel universal ball head 504, and the end of the connecting arm 506 is rotatably connected to the car body 1 through the stainless steel universal ball head 504. By rotating the rotating shaft 502, the rotating shaft 502 is connected through the two swing arms 505 and the two connecting arms. The cooperation of the connecting arm 506 drives the car door 2 to flip outward, and due to the arrangement of the two connecting arms 506, the vibration of the car door 2 is reduced and more stable during the outward swing process. The driving assembly 4 includes a base frame 402 fixed to the inner side of the car body 1 by bolts, and a transverse guide rail 406 is fixed to the inner wall of one side of the base frame 402 by bolts. A two-way threaded rod 403 is rotatably connected to the inside of the base frame 402 through a bearing, and one side of the two-way threaded rod 403 is threadedly connected to two threaded platforms 405 slidably connected to the transverse guide rail 406. Two groups of transverse light rods 408 are respectively installed on the inner side of the car body 1 through two groups of vertical fixing seats. The two groups of transverse light rods 408 are slidably connected to the rack 407 through a sliding platform, and the two racks 407 are respectively connected to the two through two connecting plates 404. The two threaded tables 405 are fixed together, and a servo motor 401 is provided on one side of the base frame 402 to drive the bidirectional threaded rod 403 to rotate along the axial direction. The top ends of the two rotating shafts 502 are both provided with gears 409 through key slots 410, and the gears 409 are meshed with the racks 407. By starting the servo motor 401, the servo motor 401 rotates to make the bidirectional threaded rod 403 drive the two threaded tables 405 to move to both ends along the transverse guide rails 406 respectively. At this time, the two threaded tables 405 respectively drive the two racks 407 to move outward along the transverse light rod 408 through the two connecting plates 404, and because the racks 407 are meshed with the gears 409, the gears 409 rotate and drive the rotating shafts 502 to rotate through the key slots 410, which not only ensures uniform speed, but also The rotation angle of the rotating shaft 502 is adjustable and controllable. The photoelectric positioning mechanism 7 includes a slot-type photoelectric switch 1 702 and a slot-type photoelectric switch 2 703 fixed to one side of the base frame 402 by bolts. The top of one of the threaded platforms 405 is fixed with a sensing frame 701 that cooperates with the slot-type photoelectric switch 1 702 and the slot-type photoelectric switch 2 703 by bolts. The magnetic positioning mechanism 6 includes two rectangular electromagnet suction cups 603 fixed to the inner side of the vehicle body 1 by bolts. The model of the rectangular electromagnet suction cups 603 is: MH-P100 / 50 / 40. One side of the two connecting plates 404 is fixed with a positioning mounting frame 601 by bolts. One side of the positioning mounting frame 601 is fixed with an iron plate 602 that cooperates with the rectangular electromagnet suction cup 603 by bolts.The sensor frame 701 cooperates with the slot-type photoelectric switch 1 702 and the slot-type photoelectric switch 2 703 to determine the opening and closing position of the vehicle door 2. When the vehicle door 2 is in the closed position, relying solely on the self-locking function of the thread in the drive assembly 4 would result in poor self-locking performance. Therefore, when the vehicle door 2 is in the closed position, the rectangular electromagnet suction cup 603 is activated. The rectangular electromagnet suction cup 603 generates a magnetic force and magnetically fixes the iron plate 602, thereby locking the vehicle door 2 in the closed position. In the event of a power failure, the magnetic force of the rectangular electromagnet suction cup 603 disappears, thus not affecting the manual opening operation of the vehicle door 2.

[0066] In order to solve the problem that the car door is often difficult to open easily when encountering an accident or sudden power outage, the lifting assembly 8 in the present invention includes four groups of vertical light rods 801 fixed to the inner side of the car body 1 through four groups of vertical fixing seats, and the two adjacent groups of vertical light rods 801 are slidably connected to the vertical slide plate 802 through a slide, and a lifting light rod 804 is fixed between the two vertical slide plates 802 by bolts, and a lifting handle 803 is fixed to one side of the lifting light rod 804 by bolts, wherein one side of the two vertical slide plates 802 is fixed with a lifting mounting frame 809 by bolts, and the bottom ends of the two gears 409 are fixed with a connecting cylinder 807 by bolts, and the circumferential outer wall of the connecting cylinder 807 is provided with an annular groove 808. 08 is provided with a snap ring 806 on the inner sleeve, and one side of the snap ring 806 is fixed to the two lifting material mounting brackets 809 through two connecting rods 805 respectively. By pulling the lifting handle 803 upward, the lifting handle 803 drives the lifting light rod 804 and the vertical slide 802 to move upward along the vertical light rod 801. At this time, the vertical slide 802 drives the gear 409 to move upward along the key groove 410 opened at the end of the rotating shaft 502 through the lifting material mounting bracket 809 and the snap ring 806 until the gear 409 is completely disengaged from the rotating shaft 502 and the key groove 410. At this time, the electric drive state of the rotating shaft 502 is released, so the car door 2 and the parallel opening and closing component 5 can be manually swung to complete the manual opening operation of the car door 2.

[0067] In order to solve the problem of insufficient sealing of the vehicle door 2, the secondary sealing assembly 3 of the present invention includes a pressing frame 1 301 and a pressing frame 2 302 respectively arranged on the outside of the two vehicle doors 2, and two sets of sealing rings 305 are provided on the inner sides of the pressing frame 1 301 and the pressing frame 2 302. The two sets of sealing rings 305 are in contact with the vehicle door 2 and the vehicle body 1 respectively. The adjacent sides of the pressing frame 1 301 and the pressing frame 2 302 are provided with mutually matching pressing grooves 303, and the top corners of the pressing grooves 303 are bonded with sealing strips 304. The four inner corners of the two vehicle doors 2 are fixed with push-pull electric Magnet 307, the model of push-pull electromagnet 307 is: JX1264B-34, one end of the push rod of push-pull electromagnet 307 passes through the car door 2 and is fixed to the clamping frame 1 301 and the clamping frame 2 302 respectively, the other end of the push rod of push-pull electromagnet 307 is fixed with a positioning iron block 306 by bolts, and the four corners of the inner side of the two car doors 2 are provided with through holes for avoiding the positioning iron block 306, and a mounting sleeve 308 is welded in the through hole. A circular electromagnet suction cup 309 that cooperates with the positioning iron block 306 is fixed in the mounting sleeve 308 by bolts. The model of the electromagnet suction cup 309 is: MH-P40 / 20. The push rod of the push-pull electromagnet 307 is provided with a sealing gasket at the contact position with the door 2. After the two doors 2 are closed, the push-pull electromagnets 307 at the four corners of the pressing frame 1 301 are simultaneously activated. The push rod of the push-pull electromagnet 307 moves backward to drive the pressing frame 1 301 to move inward, and the two sets of sealing rings 305 provided in the pressing frame 1 301 are respectively in contact with the door 2 and the car body 1. At this time, the push-pull electromagnets 307 at the four corners of the pressing frame 2 302 are activated again, so that the pressing frame 2 302 is provided with The two sets of sealing rings 305 are in contact with the car door 2 and the car body 1 respectively. At this time, the circular electromagnet suction cup 309 is activated to magnetically fix the positioning iron block 306 set at the rear end of the push rod of the push-pull electromagnet 307 to prevent the push-pull electromagnet 307 from being damaged due to long-term power-on, thereby fixing the position of the clamping frame 302. At the same time, the pressing grooves 303 opened on the adjacent sides of the clamping frame 1 301 and the clamping frame 2 302 overlap with each other, and the top corners are sealed by the sealing strip 304, thereby completing the secondary sealing operation between the two car doors 2 and the car body 1. Example 2

[0068] In the event of an accident or power outage, the door 2 cannot be opened. Therefore, the driving component 4 and the parallel opening and closing component 5 can be disengaged through the lifting component 8, and the door 2 can be opened manually. This situation is based on the premise that the door 2 and the parallel opening and closing component 5 are in good condition. If the door 2 is deformed or the parallel opening and closing component 5 is slightly deformed during an accident, it will be difficult to manually swing the rotating shaft 502 and the door 2, or even impossible to open. Therefore, further design is required to enable the door 2 to be opened even when the door 2 or the parallel opening and closing component 5 is slightly deformed.

[0069] To solve the above problems: refer to Figures 11-17, two groups of destructible components 9 are provided on the inner side of the vehicle body 1, and the destructible component 9 includes an upper destructible mounting seat 901 and a lower destructible mounting seat 902 installed on the inner side of the vehicle body 1, and the rotating shaft 502 is arranged inside the upper destructible mounting seat 901 and the lower destructible mounting seat 902, and the bottom of the lower destructible mounting seat 902 is provided with a lower limit plate 912 for supporting the bottom end of the rotating shaft 502, and the upper destructible mounting seat 901 and the lower destructible mounting seat 902 both include an inner fixing seat 903 fixed to the inner side of the vehicle body 1 by bolts, and limiting sliding grooves 907 are provided on both sides of the inner fixing seat 903, and an outer sliding seat 904 is slidably connected between the two limiting sliding grooves 907, and an installation cavity is formed between the inner fixing seat 903 and the outer sliding seat 904, and a rotating shaft 502 is provided in the installation cavity. The shaft 502 is limited by the mounting bearing 909, and the bottom of the outer slide 904 is an opening structure for avoiding the mounting bearing 909. Top grooves 906 are provided on both sides of the outer slide 904. A destructible fixing mechanism is provided between the inner fixed seat 903 and the outer slide 904. One side of the two vertical slides 802 is fixed with a top material plate 812 by bolts. The end of the top material plate 812 is fixed with two top material blocks 810 that can contact the top groove 906 by bolts. The top of the top material block 810 is provided with a top material slope 811. The inner side of the vehicle body 1 is provided with an auxiliary force mechanism 10 for destroying the destructible fixing mechanism. The destructible fixing mechanism includes semicircular grooves 908 provided on both sides of the inner fixed seat 903 and the outer slide 904. The inner fixed seat 90 3 and the semicircular slots 908 on both sides of the outer slide 904 are provided with pin rods 905, and both sides of the inner fixed seat 903 and the outer slide 904 are fixed with cast iron brackets 910 for limiting the position of the pin rod 905 by bolts, and the stress concentration side of the cast iron bracket 910 is provided with an induced fracture groove 911, which is a V-shaped structure. Since the cast iron used in the cast iron bracket 910 is a type of metal with higher brittleness, it requires a large external force to fracture, which is suitable for scenes that require a certain load-bearing capacity but fracture when overloaded, and the stress concentration side of the cast iron bracket 910 is provided with an induced fracture groove 911 with a V-shaped structure, so it can not only provide installation engagement during normal use, but also carry out violent destruction when needed. Therefore, in an emergency, The vertical slide 802 drives the ejection block 810 to move upward. At this time, the ejection slope 811 opened at the top of the ejection block 810 exerts a force on the pin 905, forcing the pin 905 to disengage from the semicircular groove 908 and exert a force on the cast iron bracket 910. At this time, the stress concentration edge of the cast iron bracket 910 is subjected to force and breaks from the induced fracture groove 911, while the pin 905 disengages from the semicircular groove 908, thereby releasing the fixed state between the inner fixed seat 903 and the outer slide 904. Then the ejection block 810 continues to move upward and exerts an upward force on the outer slide 904 through the ejection groove 906, so that the outer slide 904 slides upward and quickly disengages from the inner fixed seat 903. At the same time, through the ejection mounting frame 809 and the retaining ring 806,The gear 409 moves upward and disengages from the shaft 502 and keyway 410, thereby releasing the fixed installation state of the shaft 502 and breaking one of the fixing parts of the door 2. At this time, the door 2 can be opened freely within a certain range, allowing passengers to escape from the vehicle.

[0070] In order to facilitate rapid and violent demolition, the auxiliary force mechanism 10 in the present invention includes an upper fixed iron block 1001 and a lower fixed iron block 1005 fixed to the outer circumference of the lifting rod 804 by bolts, and a slide 1003 driven by the lifting handle 803 is sleeved on the outer circumference of the lifting rod 804 and between the upper fixed iron block 1001 and the lower fixed iron block 1005. The top of the slide 1003 is fixed with a collision iron block 1001 by bolts. 002. The bottom end of the slide 1003 is fixed with a magnetic ring 1004 by bolts, which can generate magnetic attraction with the lower fixed iron block 1005. By quickly pulling the lifting handle 803 upward, the lifting handle 803 drives the slide 1003 to move upward quickly, and collides with the upper fixed iron block 1001 by impacting the iron block 1002. At this time, the upper fixed iron block 1001 drives the lifting rod 804 to move upward quickly under the dual force of tension and inertia, thereby realizing the violent removal of the outer slide seat 904.

[0071] A method for installing a passenger door of a bus comprises the following steps:

[0072] S1: During installation, first install the base frame 402, the rectangular electromagnet suction cup 603 and the multiple sets of transverse light rods 408 on the inner side of the vehicle body 1 by screws, and then complete the installation of the connecting plate 404 and the threaded table 405, the positioning mounting frame 601 and the rack 407 by screws. At this time, install the multiple internal fixing seats 903 to the inner side of the vehicle body 1 by screws, and then clamp the rotating shaft 502 inside the internal fixing seat 903 through the mounting bearing 909. Then, clamp the outer sliding seat 904 on the internal fixing seat 903 and limit the mounting bearing 909 to fix it. At this time, clamp the pin rod 905 in the semicircular slot 908 and limit it by the cast iron clamping frame 910;

[0073] S2: Then install the vertical polished rod 801 and the vertical slide 802 on the inner side of the vehicle body 1 respectively, and then install the fixed iron block 1001, the impact iron block 1002, the slide 1003, the magnetic ring 1004 and the lower fixed iron block 1005 on the lifting polished rod 804 in sequence, and then install the lifting polished rod 804 between the two vertical slides 802. At this point, the preliminary installation is completed;

[0074] S3: Then, assemble the vehicle door 2. First, install the secondary sealing assembly 3 to the outside of the vehicle door 2, and stick the sealing strip 304 and the sealing ring 305. Then, stick the rubber edge 201 to the outside of the vehicle door 2. Then, install the stainless steel universal ball joint 504 on the inside of the vehicle door 2. Connect the stainless steel universal ball joint 504 to the swing arm 505 and the connecting arm 506 respectively. The other end of the connecting arm 506 is connected to the inside of the vehicle body 1 through the stainless steel universal ball joint 504. At this point, the entire installation of the vehicle door 2 is completed.

[0075] S4: When the car door 2 is in use, the opening and closing position of the car door 2 is determined by the cooperation between the sensing frame 701 and the slot-type photoelectric switch 1 702 and the slot-type photoelectric switch 2 703. Then, by starting the servo motor 401, the servo motor 401 rotates to make the bidirectional threaded rod 403 drive the two threaded platforms 405 to move to both ends along the transverse guide rail 406. At this time, the two threaded platforms 405 respectively drive the two racks 407 to move outward along the transverse light rod 408 through the two connecting plates 404. Since the racks 407 are meshed with the gear 409, the gear 409 rotates and drives the rotating shaft 502 to rotate through the keyway 410. The rotating shaft 502 rotates through the two swing arms 505 and the cooperation of the two connecting arms 506 to drive the car door 2 to flip outward. Due to the arrangement of the two connecting arms 506, the vibration of the car door 2 is reduced and more stable during the outward swing process.

[0076] S5: When the door 2 is closed, the servo motor 401 is started and the servo motor 401 rotates in reverse, thereby realizing the inward flipping and closing of the door 2. At this time, the rectangular electromagnet suction cup 603 is started, and the rectangular electromagnet suction cup 603 generates a magnetic force and magnetically fixes the iron plate 602, thereby locking the door 2 in the closed position.

[0077] S6: After the two doors 2 are closed, the push-pull electromagnets 307 at the four corners of the pressing frame 1 301 are simultaneously started, and the push rods of the push-pull electromagnets 307 move backward to drive the pressing frame 1 301 to move inward, and the two sets of sealing rings 305 provided in the pressing frame 1 301 are respectively in contact with the door 2 and the car body 1. At this time, the push-pull electromagnets 307 at the four corners of the pressing frame 2 302 are started again, so that the two sets of sealing rings 305 provided in the pressing frame 2 302 are respectively in contact with the door 2 and the car body 1. At this time, the circular electromagnet suction cup 309 is started to magnetically fix the positioning iron block 306 provided at the rear end of the push rod of the push-pull electromagnet 307, so that the position of the pressing frame 2 302 is fixed. At the same time, the pressing grooves 303 opened on the adjacent sides of the pressing frame 1 301 and the pressing frame 2 302 overlap with each other, and the top corners are sealed by the sealing strip 304, thereby completing the secondary sealing operation between the two doors 2 and the car body 1.

[0078] S7: When an accident or power outage occurs in the passenger car, the lifting handle 803 is quickly pulled upward, and the lifting handle 803 drives the slide 1003 to move upward quickly, and collides with the upper fixed iron block 1001 by hitting the iron block 1002. At this time, the upper fixed iron block 1001 drives the lifting rod 804 to move upward quickly under the dual forces of tension and inertia. At this time, the vertical slide 802 drives the lifting block 810 to move upward. At this time, the lifting slope 811 opened at the top of the lifting block 810 applies force to the pin rod 905, forcing the pin rod 905 to disengage from the semicircular groove 908 and apply force to the cast iron bracket 910. At this time, the stress concentration edge of the cast iron bracket 910 is subjected to force and breaks from the induced fracture groove 911 , and the pin rod 905 disengages from the semicircular groove 908, thereby releasing the fixed state between the inner fixed seat 903 and the outer sliding seat 904, and then the lifting block 810 continues to move upward and applies an upward force to the outer sliding seat 904 through the lifting groove 906, so that the outer sliding seat 904 slides upward and quickly disengages from the inner fixed seat 903. At the same time, through the lifting mounting bracket 809 and the retaining ring 806, the gear 409 moves upward and completes the disengagement operation with the rotating shaft 502 and the keyway 410, thereby realizing the violent dismantling of the outer sliding seat 904, and releasing the fixed installation state of the rotating shaft 502, and breaking one of the fixed components of the car door 2. At this time, the car door 2 can be opened freely within a certain range to facilitate passengers to escape from the car.

[0079] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The above-described embodiments merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A passenger door for a bus, comprising a bus body (1) and two doors (2), wherein the two doors (2) are provided with rubber edges (201) on all sides, and characterized in that: The two doors (2) are respectively installed in the frame of the vehicle body (1) through two parallel opening and closing components (5). The inner side of the vehicle body (1) is provided with a driving component (4) for driving the parallel opening and closing components (5) to move. The inner side of the vehicle body (1) is provided with a positioning component for positioning the opening and closing positions of the two doors (2). The positioning component includes a magnetic positioning mechanism (6) and a photoelectric positioning mechanism (7). The inner side of the vehicle body (1) is provided with a top material component (8) for quickly separating the driving component (4) from the parallel opening and closing components (5). The outer sides of the two doors (2) are provided with a secondary sealing component (3) for secondary sealing between the door (2) and the vehicle body (1). The component (5) comprises two sets of upper bearing seats (501) and blind plate bearing seats (503) fixedly connected to the inner side of the vehicle body (1), a rotating shaft (502) is provided between the two opposite upper bearing seats (501) and the blind plate bearing seats (503), one side of the rotating shaft (502) is fixedly connected to two swing arms (505), one end of each of the two swing arms (505) is rotatably connected to the vehicle door (2) through a stainless steel universal ball head (504), the top and bottom of each of the two vehicle doors (2) are rotatably connected to a connecting arm (506) through the stainless steel universal ball head (504), and the end of the connecting arm (506) is rotatably connected to the vehicle body (1) through the stainless steel universal ball head (504); The driving assembly (4) comprises a chassis (402) fixedly connected to the inner side of the vehicle body (1), a transverse guide rail (406) fixedly connected to the inner wall of one side of the chassis (402), a bidirectional threaded rod (403) rotatably connected to the interior of the chassis (402) via a bearing, one side of the bidirectional threaded rod (403) being threadedly connected to two threaded platforms (405) slidably connected to the transverse guide rail (406), and two groups of transverse light rods (405) are respectively installed on the inner side of the vehicle body (1) via two groups of vertical fixing seats. 8), the two sets of transverse light rods (408) are slidably connected to the racks (407) through the slide, and the two racks (407) are fixed to the two threaded platforms (405) through two connecting plates (404), and a servo motor (401) is provided on one side of the base frame (402) for driving the bidirectional threaded rods (403) to rotate along the axial direction. The top ends of the two rotating shafts (502) are both provided with gears (409) through keyways (410), and the gears (409) are meshed with the racks (407); The lifting assembly (8) includes four groups of vertical light rods (801) fixed to the inner side of the vehicle body (1) through four groups of vertical fixing seats, two adjacent groups of vertical light rods (801) are slidably connected to the vertical slide plate (802) through a slide, a lifting light rod (804) is fixedly connected between the two vertical slide plates (802), and one side of the lifting light rod (804) is fixedly connected to the lifting mounting frame (809), and the bottom ends of the two gears (409) are fixedly connected to the connecting tube (807), the circumferential outer wall of the connecting tube (807) is provided with an annular groove (808), and a retaining ring (806) is sleeved in the annular groove (808), and one side of the retaining ring (806) is fixed to the two lifting mounting frames (809) through two connecting rods (805); The vehicle body (1) further comprises two groups of destructible components (9), the destructible components (9) comprising an upper destructible mounting seat (901) and a lower destructible mounting seat (902) mounted on the inner side of the vehicle body (1), the rotating shaft (502) being arranged inside the upper destructible mounting seat (901) and the lower destructible mounting seat (902), the bottom of the lower destructible mounting seat (902) being provided with a lower limit plate (912) for supporting the bottom end of the rotating shaft (502), the upper destructible mounting seat (901) and the lower destructible mounting seat (902) both comprising an inner fixing seat (903) fixedly connected to the inner side of the vehicle body (1), both sides of the inner fixing seat (903) being provided with a limit slide groove (907), the two limit slide grooves (907) being slidably connected to each other. An outer slide (904) is connected, an installation cavity is formed between the inner fixed seat (903) and the outer slide (904), a mounting bearing (909) for limiting the rotating shaft (502) is provided in the installation cavity, the bottom of the outer slide (904) is an opening structure for avoiding the mounting bearing (909), top grooves (906) are provided on both sides of the outer slide (904), a destructible fixing mechanism is provided between the inner fixed seat (903) and the outer slide (904), one side of the two vertical slides (802) is fixedly connected to a ejection plate (812), the end of the ejection plate (812) is fixedly connected to two ejection blocks (810) that can contact the top groove (906), and the top of the ejection block (810) is provided with an ejection slope (811); The destructible fixing mechanism comprises semicircular clamping grooves (908) provided on both sides of the inner fixing seat (903) and the outer sliding seat (904); pin rods (905) are clamped in the semicircular clamping grooves (908) on both sides of the inner fixing seat (903) and the outer sliding seat (904); cast iron clamping frames (910) for limiting the position of the pin rods (905) are fixedly connected to both sides of the inner fixing seat (903) and the outer sliding seat (904); an induced fracture groove (911) is provided on a stress concentration side of the cast iron clamping frame (910); and the induced fracture groove (911) is a V-shaped structure.

2. A passenger door for a bus according to claim 1, characterized in that: The photoelectric positioning mechanism (7) includes a slot-type photoelectric switch 1 (702) and a slot-type photoelectric switch 2 (703) fixedly connected to one side of the base frame (402), wherein the top of one of the threaded platforms (405) is fixedly connected to an induction frame (701) that matches the slot-type photoelectric switch 1 (702) and the slot-type photoelectric switch 2 (703), and the magnetic positioning mechanism (6) includes two rectangular electromagnet suction cups (603) fixedly connected to the inner side of the vehicle body (1), and one side of each of the two connecting plates (404) is fixedly connected to a positioning mounting frame (601), and one side of the positioning mounting frame (601) is fixedly connected to an iron plate (602) that matches the rectangular electromagnet suction cup (603).

3. A passenger door for a bus according to claim 2, characterized in that: The secondary sealing assembly (3) comprises a first pressing frame (301) and a second pressing frame (302) respectively arranged on the outside of the two vehicle doors (2). The inner sides of the first pressing frame (301) and the second pressing frame (302) are provided with two sets of sealing rings (305). The two sets of sealing rings (305) are in contact with the vehicle door (2) and the vehicle body (1) respectively. The adjacent sides of the first pressing frame (301) and the second pressing frame (302) are provided with mutually matching pressing grooves (303). The top corners of the pressing grooves (303) are fixedly connected with sealing strips (304). The four inner corners of the two vehicle doors (2) are fixedly connected with push-pull electromagnets (307). ), one end of the push-pull electromagnet (307) push rod passes through the vehicle door (2) and is fixed to the first pressing frame (301) and the second pressing frame (302) respectively, the other end of the push-pull electromagnet (307) push rod is fixedly connected to the positioning iron block (306), four through holes for avoiding the positioning iron block (306) are opened at the inner corners of the two vehicle doors (2), a mounting sleeve (308) is fixedly connected in the through hole, a circular electromagnet suction cup (309) matched with the positioning iron block (306) is fixedly connected in the mounting sleeve (308), and a sealing gasket is provided at the contact position between the push-pull electromagnet (307) push rod and the vehicle door (2).

4. A passenger door for a bus according to claim 3, characterized in that: An auxiliary force mechanism (10) for destroying the destructible fixing mechanism is provided on the inner side of the vehicle body (1).

5. A passenger door for a bus according to claim 4, characterized in that: The auxiliary force mechanism (10) comprises an upper fixed iron block (1001) and a lower fixed iron block (1005) fixedly connected to the outer circumference of the lifting rod (804); a slide cylinder (1003) driven by lifting by a lifting handle (803) is sleeved on the outer circumference of the lifting rod (804) and located between the upper fixed iron block (1001) and the lower fixed iron block (1005); a top end of the slide cylinder (1003) is fixedly connected to an impact iron block (1002) capable of contacting and colliding with the upper fixed iron block (1001); and a bottom end of the slide cylinder (1003) is fixedly connected to a magnetic ring (1004) capable of generating magnetic attraction with the lower fixed iron block (1005).

6. A method for installing a passenger door of a bus, applicable to the passenger door of a bus as claimed in claim 5, characterized in that: The following steps are involved: S1: During installation, first, the chassis (402), the rectangular electromagnet suction cup (603) and the plurality of transverse light rods (408) are installed on the inner side of the vehicle body (1) by screws, and then the connection plate (404) and the threaded table (405), the positioning mounting frame (601) and the rack (407) are installed one after another by screws. At this time, the plurality of inner fixing seats (903) are installed on the inner side of the vehicle body (1) by screws, and then the rotating shaft (502) is clamped inside the inner fixing seat (903) through the mounting bearing (909), and then the outer sliding seat (904) is clamped on the inner fixing seat (903) and the mounting bearing (909) is fixed in a limited position. At this time, the pin rod (905) is clamped in the semicircular slot (908) and fixed in a limited position by the cast iron clamping frame (910); S2: Then, a vertical polished rod (801) and a vertical slide plate (802) are respectively installed on the inner side of the vehicle body (1), and then the upper fixed iron block (1001), the impact iron block (1002), the slide cylinder (1003), the magnetic ring (1004) and the lower fixed iron block (1005) are sequentially installed on the lifting polished rod (804), and then the lifting polished rod (804) is installed between the two vertical slide plates (802). At this point, the preliminary installation is completed; S3: Then assemble the car door (2). First, install the secondary sealing assembly (3) to the outside of the car door (2), and stick the sealing strip (304) and the sealing ring (305). Then, stick the rubber edge (201) to the outside of the car door (2). Then, install the stainless steel universal ball head (504) on the inside of the car door (2), and connect it to the swing arm (505) and the connecting arm (506) respectively through the stainless steel universal ball head (504). The other end of the connecting arm (506) is connected to the inside of the car body (1) through the stainless steel universal ball head (504). At this point, the entire installation of the car door (2) is completed. S4: When the door (2) is in use, the opening and closing position of the door (2) is determined by the cooperation between the induction frame (701) and the slot-type photoelectric switch 1 (702) and the slot-type photoelectric switch 2 (703). Then, by starting the servo motor (401), the servo motor (401) rotates to drive the two threaded rods (403) to move to both ends along the transverse guide rail (406). At this time, the two threaded rods (405) drive the two threaded rods (405) to move to both ends respectively through the two connecting plates (404). The rack (407) moves outward along the transverse polished rod (408), and because the rack (407) is meshed with the gear (409), the gear (409) rotates to drive the rotating shaft (502) to rotate through the keyway (410), and the rotating shaft (502) rotates through the two swing arms (505) and in cooperation with the two connecting arms (506), drives the door (2) to flip outward, and due to the arrangement of the two connecting arms (506), the shaking amount of the door (2) during the outward swing process is reduced and more stable; S5: When the vehicle door (2) is closed, the servo motor (401) is started, and the servo motor (401) is reversed, so that the vehicle door (2) is turned inward and closed. At this time, the rectangular electromagnet sucker (603) is started, and the rectangular electromagnet sucker (603) generates a magnetic force and magnetically fixes the iron plate (602), thereby locking the vehicle door (2) in the closed position; S6: After the two doors (2) are closed, the push-pull electromagnets (307) at the four corners of the pressing frame (301) are simultaneously activated, and the push rods of the push-pull electromagnets (307) move backward to drive the pressing frame (301) to move inward, and the two sets of sealing rings (305) provided on the pressing frame (301) are respectively in contact with the door (2) and the vehicle body (1). At this time, the push-pull electromagnets (307) at the four corners of the pressing frame (302) are activated again, so that the two sets of sealing rings (305) provided on the pressing frame (302) are respectively in contact with the door (2) and the vehicle body (1). The sealing ring (305) contacts the vehicle door (2) and the vehicle body (1) respectively. At this time, the positioning iron block (306) provided at the rear end of the push rod of the push-pull type electromagnet (307) is magnetically fixed by activating the circular electromagnet suction cup (309). At the same time, the pressing grooves (303) provided on the adjacent sides of the pressing frame 1 (301) and the pressing frame 2 (302) are overlapped with each other, and the top corners are sealed by the sealing strip (304), thereby completing the secondary sealing operation between the two vehicle doors (2) and the vehicle body (1); S7: When an accident or power failure occurs in the passenger car, the lifting handle (803) is quickly pulled upward, and the lifting handle (803) drives the slide (1003) to move upward quickly, and collides with the upper fixed iron block (1001) by hitting the iron block (1002). At this time, the upper fixed iron block (1001) drives the lifting rod (804) to move upward quickly under the dual force of tension and inertia. At this time, the vertical slide (802) drives the top material block (810) to move upward. At this time, the top material slope (811) opened at the top of the top material block (810) applies force to the pin rod (905), forcing the pin rod (905) to disengage from the semicircular groove (908) and apply force to the cast iron bracket (910). At this time, the stress concentration edge of the cast iron bracket (910) is subjected to force and fractures from the induced fracture groove (911). The pin (905) is disengaged from the semicircular groove (908), thereby releasing the fixed state between the inner fixed seat (903) and the outer slide (904), and then the ejector block (810) continues to move upward and applies an upward force to the outer slide (904) through the ejector groove (906), so that the outer slide (904) slides upward and quickly separates from the inner fixed seat (903). At the same time, the gear (409) moves upward and completes the separation operation with the rotating shaft (502) and the keyway (410) through the ejector mounting frame (809) and the snap ring (806), thereby realizing the violent removal of the outer slide (904) and releasing the fixed installation state of the rotating shaft (502), and breaking one of the fixed components of the door (2). At this time, the door (2) can be opened freely within a certain range to facilitate passengers to escape from the car.

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