阅读说明：本技术 一种公交车塞拉门机构 (Bus sliding plug door mechanism ) 是由 陈都 韩锋钢 蔡永恒 黄宝有 吴文菁 于 2019-09-27 设计创作，主要内容包括：本发明公开一种公交车塞拉门机构,包括门体、携门架、安装支架和驱动机构,滑动架上具有固定架、安装轨道和导向滑柱,携门架滑动安装在导向滑柱上,安装轨道上安装有驱动两携门架相向和相背平移并带动滑动架前后平移的上述驱动机构；两固定架下方分别设有摆臂轴,两单门体处于两摆臂轴之间,摆臂轴的上端部转动安装在安装支架上,摆臂轴的下端部转动安装在车体上,固定架与摆臂轴的上端上设有带动摆臂轴转动的摆臂传动机构,摆臂轴的下端与单门体的下部上安装有随摆臂轴的转动而在单门体上左右滑动的摆臂滑动机构。与现有技术相比,能使每一单门体的上下两端受力均匀,保证门体的启闭运行平稳；且整体结构较为紧凑,并不易被他人打开,运行安全。(The invention discloses a bus sliding plug door mechanism, which comprises a door body, door carrying frames, a mounting bracket and a driving mechanism, wherein the sliding frame is provided with a fixed frame, a mounting rail and a guide sliding column; the swing arm sliding mechanism is characterized in that swing arm shafts are respectively arranged below the two fixing frames, the two single door bodies are positioned between the two swing arm shafts, the upper end parts of the swing arm shafts are rotatably installed on the installation support, the lower end parts of the swing arm shafts are rotatably installed on the vehicle body, swing arm transmission mechanisms for driving the swing arm shafts to rotate are arranged at the upper ends of the fixing frames and the swing arm shafts, and swing arm sliding mechanisms which slide on the single door bodies left and right along with the rotation of the swing arm shafts are installed at the lower ends of the swing arm shafts and the lower parts of the single door bodies. Compared with the prior art, the upper end and the lower end of each single door body can be uniformly stressed, and the opening and closing operation of the door bodies is ensured to be stable; and the whole structure is compact, the door is not easy to be opened by others, and the operation is safe.)

1. A bus sliding plug door mechanism comprises a door body, door carrying frames, a mounting support and a driving mechanism, wherein the door body is composed of two single door bodies which are arranged close to each other left and right, the mounting support is positioned above the door body, a sliding frame which moves in a front-and-back mode is mounted on the mounting support, the driving mechanism drives the door bodies to open and close the door, the driving mechanism is mounted on the mounting support, the door carrying frames are respectively arranged at the upper parts of the two single door bodies, the two door carrying frames are arranged close to each other left and right, one end of each door carrying frame is mounted on the single door body, and the other end; the method is characterized in that:

The sliding frame is provided with two fixed frames which are oppositely arranged at a left and a right interval, and an installation track and a guide sliding post which are arranged between the two fixed frames and extend along the left and right directions, the two fixed frames are slidably installed on the installation support, the two guide sliding posts are arranged, the installation track is arranged between the two guide sliding posts, one door carrying frame is slidably installed on one guide sliding post in a sliding manner along the axial direction of the guide sliding post, the other door carrying frame is correspondingly slidably installed on the other guide sliding post in a sliding manner along the axial direction of the guide sliding post, and the installation track is provided with the driving mechanism which drives the two door carrying frames to translate oppositely and drive the sliding frame to translate back and forth;

the swing arm transmission mechanism is characterized in that swing arm shafts extending along the vertical direction are respectively arranged below the two fixing frames, the two single door bodies are arranged between the two swing arm shafts, the swing arm shafts are located in front of the single door bodies, the upper end portions of the swing arm shafts are rotatably installed on the installation support, the lower end portions of the swing arm shafts are rotatably installed on the vehicle body, swing arm transmission mechanisms driving the swing arm shafts to rotate along with the translation of the fixing frames are arranged on the upper ends of the fixing frames and the swing arm shafts, and swing arm sliding mechanisms sliding left and right on the single door bodies along with the rotation of the swing arm shafts are installed on the lower ends of the swing arm shafts and the lower portions of the single door bodies.

2. A bus sliding plug door mechanism according to claim 1, wherein: the mounting bracket is provided with a left mounting plate and a right mounting plate which are vertically distributed at a relative interval, a connecting beam is arranged between the rear ends of the two mounting plates, the two ends of the connecting beam are correspondingly locked and mounted on the two mounting plates, opposite surfaces of the two mounting plates, which are opposite, are respectively concavely provided with a strip-shaped chute extending along the front-back direction, the fixing frame is of a plate structure, the fixing frame is vertically arranged outside a notch of the strip-shaped chute, one surface of each of the two fixing frames, which is opposite to each other, is respectively provided with a bearing which is arranged in the strip-shaped chute and slides in the strip-shaped chute, a limiting groove which is communicated with the left side and the right side and extends along the front side and the rear side is arranged.

3. A bus sliding plug door mechanism according to claim 2, wherein: the connecting beam is composed of an upper top plate and a rear side plate, two ends of the upper top plate are correspondingly stacked on the two mounting plates and are in locking fit with the mounting plates, the mounting plate is matched with the rear side plate in an attaching way and is positioned in front of the rear side plate, the right side of the bottom surface of the upper top plate is provided with a curve guide rail which extends along the left-right direction and is enclosed by the top surface, the front side surface and the rear side surface, the curved guide rail is provided with an arc-shaped section and a straight line section, the arc-shaped section is positioned at the left side of the straight line section, the left end of the arc-shaped section extends out of the front part of the connecting beam, the right end of the arc-shaped section and the straight line section are positioned under the upper top plate and are matched with the upper top plate in a sticking way, the left end of the arc-shaped section is located in front of the right end of the arc-shaped section, the arc-shaped section is installed on the upper top plate in a mode of being capable of being adjusted in a left-right translation mode through the connecting piece, and the right end of the straight line section is installed on the upper top plate in a mode of being adjusted in a left-right translation mode.

4. A bus sliding plug door mechanism according to claim 2, wherein: the opposite face rear ends that two mounting panels are relative all are equipped with relative lug, set up the through-hole that runs through from top to bottom on the above-mentioned lug, the upper end terminal surface central point department of above-mentioned swing arm axle upwards extends and has stretched into in the through-hole and the bearing frame of rotary installation in the through-hole.

5. A bus sliding plug door mechanism according to claim 2, wherein: the swing arm transmission mechanism is provided with a crank and a connecting rod, an L-shaped block with a vertical part and a transverse part is arranged on the bottom surface of each fixing frame in a downward extending mode, the transverse parts of the L-shaped blocks on the two fixing frames extend oppositely, the first end of the connecting rod is located below the transverse parts and is matched with the transverse parts in an overlapped mode, the first end of the connecting rod is movably hinged to the transverse parts, the second end of the connecting rod extends backwards, the end part of the second end of the connecting rod is overlapped on the end part of the first end of the crank and is movably hinged to the end part of the first end of the crank, and the end part of the second end of the crank is connected with the front side of the upper end.

6. a bus sliding plug door mechanism according to claim 2, wherein: the swing arm sliding mechanism is provided with a swing arm, a rod end joint bearing and a roller, wherein the swing arm is an arc-shaped rod body with a backward notch, the first end of the swing arm is fixed on the outer side wall of the lower end of the swing arm shaft, the second end of the swing arm extends towards the door body direction, a pulley profile is arranged on the front side face of the lower part of the single door body, the pulley profile is embedded in the single door body and extends along the left and right directions of the single door body, a strip-shaped groove penetrating from left to right is arranged on the front side face of the pulley profile, the roller is vertically and slidably arranged in the strip-shaped groove, a bearing seat outside the notch of the strip-shaped groove is arranged on the end face of the roller, the rod end joint bearing is connected with the bearing seat, and.

7. the bus sliding plug door mechanism according to claim 6, wherein: the upper groove wall and the lower groove wall of the strip-shaped groove are positioned at the groove opening and are provided with clamping strips which are relatively spaced up and down and extend along the length direction of the strip-shaped groove, the wheel surface of the roller is concavely provided with a closed-loop groove which surrounds along the circumferential direction of the roller, the upper clamping strip and the lower clamping strip are correspondingly clamped into the closed-loop groove, the bearing seat is provided with an upper sheet body, a lower sheet body and a rear sheet body which is positioned between the upper sheet body and the lower sheet body which are integrally formed, the mounting end of the rod-end joint bearing is positioned between the upper sheet body and the lower sheet body and is locked together through the matching of a bolt and a nut, the rear sheet body is provided with a mounting through hole, the center of the roller is provided with a central through hole which extends along the axial direction of the roller, a damping shaft sleeve is sleeved in the central through hole, a roller shaft of which one end penetrates out of the central through hole into the mounting, the roller shaft is tightly matched with the damping shaft sleeve through a gasket sleeved outside the roller shaft.

8. A bus sliding plug door mechanism according to claim 2 or 6, characterized in that: the lower end part of the swing arm shaft is locked with a lower mounting plate, the lower mounting plate is provided with an upper transverse part and a rear vertical part positioned behind the upper transverse part, the rear vertical part is locked on a vehicle body, the lower end surface of the swing arm shaft is overlapped on the front end of the upper transverse part and is rotatably mounted on the upper transverse part through a bearing, the rear end of the upper transverse part is provided with two limiting holes which are arranged at intervals left and right, the outer side wall of the lower end part of the swing arm shaft is convexly provided with a lower lug which is overlapped above the rear end of the upper transverse part and can be oppositely overlapped with any limiting hole along with the rotation of the swing arm shaft, the lower lug is provided with an aligning hole which is opposite to the limiting hole, a mounting sleeve is embedded in the aligning hole, a positioning pin is mounted in the mounting sleeve, the lower end part of the positioning pin is convexly provided with a convex arc part which extends out of the lower lug to the limiting hole along with the outward, a compression spring is, the convex arc part of the positioning pin penetrates through the support ring to the outside of the lower lug, the outer side wall of the top end of the positioning pin is provided with a closed-loop convex ring in an outward protruding mode, the compression spring is tensioned between the support ring and the closed-loop convex ring, and a nut cap positioned above the positioning pin is arranged in an upper end port of the mounting sleeve in a threaded mode.

9. a bus sliding plug door mechanism according to claim 3, wherein: a synchronous swing arm shaft is arranged between the two mounting plates, the end parts of the two ends of the synchronous swing arm shaft are respectively and correspondingly rotatably mounted in the two mounting plates through bearings, the synchronous swing arm shaft is positioned above the front guide sliding column, the two ends of the synchronous swing arm shaft are respectively and fixedly sleeved with a connecting swing arm extending downwards, and the lower end of the connecting swing arm is positioned in front of the front guide sliding column and is mounted at the front end of the fixing frame through a bolt.

10. A bus sliding plug door mechanism according to claim 3, wherein: the driving mechanism is provided with a driving motor, a first rack, a second rack and a transmission gear, the driving motor is fixedly and horizontally arranged on the top surface of the mounting rail, an output shaft of the driving motor is arranged towards the left or the right, the transmission gear is horizontally arranged below the mounting rail, a gear reversing transmission box which is connected with the transmission gear and drives the transmission gear to rotate is arranged on the output shaft of the driving motor, sliding sleeves are respectively sleeved outside two guide sliding columns which are arranged in front and back, a mounting block for mounting a portal frame is locked on the bottom surface of the sliding sleeve, the back surface of the sliding sleeve on the front side is fixedly provided with the first rack which extends along the axial direction of the sliding sleeve, teeth of the first rack are meshed with the transmission gear, the front surface of the sliding sleeve on the back side is fixedly provided with the second rack which extends along the axial direction of the sliding sleeve, and teeth of the second rack are meshed with the transmission gear, and the first rack and the second rack are distributed on the left and right of the sliding frame, the top surface of the sliding sleeve at the rear side is rotatably provided with a guide roller which is horizontally arranged, and the guide roller is arranged in the curve guide rail in a sliding manner.

Technical Field

the invention relates to the field of buses, in particular to a sliding plug door mechanism of a bus.

Background

The traditional buses mostly adopt outward-opening or inward-opening type doors, and the outward-opening or inward-opening type doors are easy to cause the problem of personnel clamping injury during opening and closing, so that the conventional buses gradually start sliding-plug doors like movable doors for the sake of safety. The sliding plug door mainly means that the door has two actions of plugging and pulling, namely, the door is plugged into the door opening from the outside of the vehicle when being closed so as to be closed and sealed; when the door is opened, the sliding plug door moves outwards to the door opening for a certain distance and slides along the outer side of the vehicle body. The most important thing when the car is using is to guarantee the stability of operation, and the transmission of the existing sliding plug door mostly adopts the combination mode of the motor and belt, for example, Chinese patent CN208347544U discloses a sliding plug door transmission device, which includes the driving motor arranged in the middle position, the front end of the driving motor is provided with the swinging disk connected with the stator of the driving motor and the motor toothed belt wheel connected with the output shaft of the driving motor; the motor bracket is used for supporting the driving motor, and the front lower end of the motor bracket is bilaterally and symmetrically provided with two reversing wheels for tensioning and reversing belt transmission; two belt pulleys symmetrically arranged at two sides of the reversing wheel, wherein a belt is wound on the belt pulleys and a motor toothed belt wheel of the driving motor in a closed loop manner; two belt clamping plates for outputting linear motion are obliquely and symmetrically arranged on the belt along two sides of the driving motor; in the above scheme, the whole structure of the transmission mechanism is complex, the stress points of the whole sliding plug door are concentrated on the upper part, the stress is uneven, and the operation is not stable.

in view of the above, the present inventors have conducted extensive studies to solve the above problems.

Disclosure of Invention

The invention aims to provide a bus sliding plug door mechanism to solve the problems of complex integral structure, uneven stress on a door body and unstable operation of the sliding plug door in the prior art.

in order to achieve the purpose, the invention adopts the following technical scheme:

A bus sliding plug door mechanism comprises a door body, door carrying frames, a mounting support and a driving mechanism, wherein the door body is composed of two single door bodies which are arranged close to each other left and right, the mounting support is positioned above the door body, a sliding frame which moves in a front-and-back mode is mounted on the mounting support, the driving mechanism drives the door bodies to open and close the door, the driving mechanism is mounted on the mounting support, the door carrying frames are respectively arranged at the upper parts of the two single door bodies, the two door carrying frames are arranged close to each other left and right, one end of each door carrying frame is mounted on the single door body, and the other end;

The sliding frame is provided with two fixed frames which are oppositely arranged at a left and a right interval, and an installation track and a guide sliding post which are arranged between the two fixed frames and extend along the left and right directions, the two fixed frames are slidably installed on the installation support, the two guide sliding posts are arranged, the installation track is arranged between the two guide sliding posts, one door carrying frame is slidably installed on one guide sliding post in a sliding manner along the axial direction of the guide sliding post, the other door carrying frame is correspondingly slidably installed on the other guide sliding post in a sliding manner along the axial direction of the guide sliding post, and the installation track is provided with the driving mechanism which drives the two door carrying frames to translate oppositely and drive the sliding frame to translate back and forth;

The swing arm transmission mechanism is characterized in that swing arm shafts extending along the vertical direction are respectively arranged below the two fixing frames, the two single door bodies are arranged between the two swing arm shafts, the swing arm shafts are located in front of the single door bodies, the upper end portions of the swing arm shafts are rotatably installed on the installation support, the lower end portions of the swing arm shafts are rotatably installed on the vehicle body, swing arm transmission mechanisms driving the swing arm shafts to rotate along with the translation of the fixing frames are arranged on the upper ends of the fixing frames and the swing arm shafts, and swing arm sliding mechanisms sliding left and right on the single door bodies along with the rotation of the swing arm shafts are installed on the lower ends of the swing arm shafts and the lower portions of the single door bodies.

The mounting bracket is provided with a left mounting plate and a right mounting plate which are vertically distributed at a relative interval, a connecting beam is arranged between the rear ends of the two mounting plates, the two ends of the connecting beam are correspondingly locked and mounted on the two mounting plates, opposite surfaces of the two mounting plates, which are opposite, are respectively concavely provided with a strip-shaped chute extending along the front-back direction, the fixing frame is of a plate structure, the fixing frame is vertically arranged outside a notch of the strip-shaped chute, one surface of each of the two fixing frames, which is opposite to each other, is respectively provided with a bearing which is arranged in the strip-shaped chute and slides in the strip-shaped chute, a limiting groove which is communicated with the left side and the right side and extends along the front side and the rear side is arranged.

The connecting beam is composed of an upper top plate and a rear side plate, two ends of the upper top plate are correspondingly stacked on the two mounting plates and are in locking fit with the mounting plates, the mounting plate is matched with the rear side plate in an attaching way and is positioned in front of the rear side plate, the right side of the bottom surface of the upper top plate is provided with a curve guide rail which extends along the left-right direction and is enclosed by the top surface, the front side surface and the rear side surface, the curved guide rail is provided with an arc-shaped section and a straight line section, the arc-shaped section is positioned at the left side of the straight line section, the left end of the arc-shaped section extends out of the front part of the connecting beam, the right end of the arc-shaped section and the straight line section are positioned under the upper top plate and are matched with the upper top plate in a sticking way, the left end of the arc-shaped section is located in front of the right end of the arc-shaped section, the arc-shaped section is installed on the upper top plate in a mode of being capable of being adjusted in a left-right translation mode through the connecting piece, and the right end of the straight line section is installed on the upper top plate in a mode of being adjusted in a left-right translation mode.

The opposite face rear ends that two mounting panels are relative all are equipped with relative lug, set up the through-hole that runs through from top to bottom on the above-mentioned lug, the upper end terminal surface central point department of above-mentioned swing arm axle upwards extends and has stretched into in the through-hole and the bearing frame of rotary installation in the through-hole.

The swing arm transmission mechanism is provided with a crank and a connecting rod, an L-shaped block with a vertical part and a transverse part is arranged on the bottom surface of each fixing frame in a downward extending mode, the transverse parts of the L-shaped blocks on the two fixing frames extend oppositely, the first end of the connecting rod is located below the transverse parts and is matched with the transverse parts in an overlapped mode, the first end of the connecting rod is movably hinged to the transverse parts, the second end of the connecting rod extends backwards, the end part of the second end of the connecting rod is overlapped on the end part of the first end of the crank and is movably hinged to the end part of the first end of the crank, and the end part of the second end of the crank is connected with the front side of the upper end.

The swing arm sliding mechanism is provided with a swing arm, a rod end joint bearing and a roller, wherein the swing arm is an arc-shaped rod body with a backward notch, the first end of the swing arm is fixed on the outer side wall of the lower end of the swing arm shaft, the second end of the swing arm extends towards the door body direction, a pulley profile is arranged on the front side face of the lower part of the single door body, the pulley profile is embedded in the single door body and extends along the left and right directions of the single door body, a strip-shaped groove penetrating from left to right is arranged on the front side face of the pulley profile, the roller is vertically and slidably arranged in the strip-shaped groove, a bearing seat outside the notch of the strip-shaped groove is arranged on the end face of the roller, the rod end joint bearing is connected with the bearing seat, and.

the upper groove wall and the lower groove wall of the strip-shaped groove are positioned at the groove opening and are provided with clamping strips which are relatively spaced up and down and extend along the length direction of the strip-shaped groove, the wheel surface of the roller is concavely provided with a closed-loop groove which surrounds along the circumferential direction of the roller, the upper clamping strip and the lower clamping strip are correspondingly clamped into the closed-loop groove, the bearing seat is provided with an upper sheet body, a lower sheet body and a rear sheet body which is positioned between the upper sheet body and the lower sheet body which are integrally formed, the mounting end of the rod-end joint bearing is positioned between the upper sheet body and the lower sheet body and is locked together through the matching of a bolt and a nut, the rear sheet body is provided with a mounting through hole, the center of the roller is provided with a central through hole which extends along the axial direction of the roller, a damping shaft sleeve is sleeved in the central through hole, a roller shaft of which one end penetrates out of the central through hole into the mounting, the roller shaft is tightly matched with the damping shaft sleeve through a gasket sleeved outside the roller shaft.

The lower end part of the swing arm shaft is locked with a lower mounting plate, the lower mounting plate is provided with an upper transverse part and a rear vertical part positioned behind the upper transverse part, the rear vertical part is locked on a vehicle body, the lower end surface of the swing arm shaft is overlapped on the front end of the upper transverse part and is rotatably mounted on the upper transverse part through a bearing, the rear end of the upper transverse part is provided with two limiting holes which are arranged at intervals left and right, the outer side wall of the lower end part of the swing arm shaft is convexly provided with a lower lug which is overlapped above the rear end of the upper transverse part and can be oppositely overlapped with any limiting hole along with the rotation of the swing arm shaft, the lower lug is provided with an aligning hole which is opposite to the limiting hole, a mounting sleeve is embedded in the aligning hole, a positioning pin is mounted in the mounting sleeve, the lower end part of the positioning pin is convexly provided with a convex arc part which extends out of the lower lug to the limiting hole along with the outward, a compression spring is, the convex arc part of the positioning pin penetrates through the support ring to the outside of the lower lug, the outer side wall of the top end of the positioning pin is provided with a closed-loop convex ring in an outward protruding mode, the compression spring is tensioned between the support ring and the closed-loop convex ring, and a nut cap positioned above the positioning pin is arranged in an upper end port of the mounting sleeve in a threaded mode.

A synchronous swing arm shaft is arranged between the two mounting plates, the end parts of the two ends of the synchronous swing arm shaft are respectively and correspondingly rotatably mounted in the two mounting plates through bearings, the synchronous swing arm shaft is positioned above the front guide sliding column, the two ends of the synchronous swing arm shaft are respectively and fixedly sleeved with a connecting swing arm extending downwards, and the lower end of the connecting swing arm is positioned in front of the front guide sliding column and is mounted at the front end of the fixing frame through a bolt.

the driving mechanism is provided with a driving motor, a first rack, a second rack and a transmission gear, the driving motor is fixedly and horizontally arranged on the top surface of the mounting rail, an output shaft of the driving motor is arranged towards the left or the right, the transmission gear is horizontally arranged below the mounting rail, a gear reversing transmission box which is connected with the transmission gear and drives the transmission gear to rotate is arranged on the output shaft of the driving motor, sliding sleeves are respectively sleeved outside two guide sliding columns which are arranged in front and back, a mounting block for mounting a portal frame is locked on the bottom surface of the sliding sleeve, the back surface of the sliding sleeve on the front side is fixedly provided with the first rack which extends along the axial direction of the sliding sleeve, teeth of the first rack are meshed with the transmission gear, the front surface of the sliding sleeve on the back side is fixedly provided with the second rack which extends along the axial direction of the sliding sleeve, and teeth of the second rack are meshed with the transmission gear, and the first rack and the second rack are distributed on the left and right of the sliding frame, the top surface of the sliding sleeve at the rear side is rotatably provided with a guide roller which is horizontally arranged, and the guide roller is arranged in the curve guide rail in a sliding manner.

After the technical scheme is adopted, the opening force applied to each single door body can be further transmitted to the lower end of the single door body through the two swing arm shafts, so that the upper end and the lower end of each single door body are uniformly stressed, and the opening and closing operation of the door bodies is stable; meanwhile, the driving mechanism is arranged on the two fixing frames, so that the whole structure is compact and does not occupy too much space; in addition, the door body has the locking arm force which is difficult to be opened by other people by matching with the swing arm transmission mechanism and the swing arm sliding mechanism, and the operation is safe.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a schematic view of the assembly of the mounting bracket, the driving mechanism and the sliding bracket according to the present invention;

FIG. 3 is a schematic view of the carriage and the driving mechanism of the present invention;

FIG. 4 is another perspective view of the carriage and drive mechanism of the present invention;

FIG. 5 is a schematic view of the swing arm shaft according to the present invention;

FIG. 6 is an enlarged view of portion A of FIG. 5;

FIG. 7 is an enlarged view of portion B of FIG. 5;

FIG. 8 is an exploded perspective view of the lower end of the swing arm shaft of the present invention;

Fig. 9 is a schematic structural view of a mounting bracket according to the present invention.

Detailed Description

In order to further explain the technical scheme of the invention, the following detailed description is combined with the accompanying drawings.

The invention discloses a bus sliding plug door mechanism, which comprises a door body, door carrying frames 2, mounting supports and a driving mechanism, wherein the door body is composed of two single door bodies 1 which are arranged close to each other from left to right, the structure of the door body is the conventional structure, the mounting supports are arranged above the door bodies, sliding frames which move in a front-back mode are mounted on the mounting supports, the driving mechanism drives the door bodies to open and close the doors, the driving mechanism is mounted on the mounting supports, the door carrying frames 2 are arranged on the upper portions of the two single door bodies 1 respectively, the structure of the door carrying frames 2 is the same as that of the conventional door carrying frames 2 and is of an arc structure, the two door carrying frames 2 are arranged close to each other from left to right, one ends of the door carrying frames 2 are mounted on the single door bodies.

The mounting bracket is provided with two mounting plates 31 which are vertically distributed at a left side and a right side at a relative interval, a connecting beam 32 is arranged between the rear ends of the two mounting plates 31, the end parts of the two ends of the connecting beam 32 are correspondingly and fixedly mounted on the two mounting plates 31, namely, the connecting beam 32 is composed of an upper top plate and a rear side plate, the two ends of the upper top plate are correspondingly stacked on the two mounting plates 31 and are respectively and fixedly matched with the mounting plates 31 through the matching of bolts and nuts, the mounting plates 31 are matched with the rear side plate in an attaching mode, and the mounting plates are positioned in front of.

the sliding frame is slidably mounted on the two mounting plates 31, specifically, the sliding frame is provided with two fixing frames 41 which are oppositely arranged at a left and a right interval, and a mounting rail 42 and a guide sliding column 43 which are arranged between the two fixing frames 41 and extend along the left and right directions, the fixing frames 41 are of plate structures, the guide sliding columns 43 are arranged in two numbers, and the mounting rail 42 is arranged between the two guide sliding columns 43. The fixing frame 41 is slidably mounted on the mounting plates 31, opposite surfaces of the two mounting plates 31 are both concavely provided with strip-shaped sliding grooves 311 extending along the front-back direction, the fixing frame 41 is vertically positioned outside a notch of the strip-shaped sliding grooves 311, and opposite surfaces of the two fixing frames 41 are respectively provided with a bearing 411 positioned in the strip-shaped sliding grooves 311 and sliding in the strip-shaped sliding grooves, namely, the end part of each guide sliding column 43 penetrates out of the fixing frame 41, the bearing 411 is rotatably sleeved outside the part of the guide sliding column 43 positioned outside the fixing frame 41, namely, each fixing frame 41 is provided with two bearings 411 distributed front and back, preferably, a limit groove (not shown in the figure) penetrating from left to right and extending along the front and back is arranged on the groove wall of the strip-shaped sliding groove 311, the inner ring of the bearing 411 passes through the bolt 412 and the end part of the guide sliding column 43, and the head part of the bolt is positioned in the limit, on the other hand, the bearing 411 is easy to be assembled and disassembled.

One door carrying frame 2 is slidably mounted on one guide sliding column in a sliding manner along the axial direction of the guide sliding column 43, the other door carrying frame 2 is correspondingly slidably mounted on the other guide sliding column in a sliding manner along the axial direction of the guide sliding column, and a driving mechanism for driving the two door carrying frames to translate in the opposite direction and driving the sliding frame to translate back and forth is mounted on the mounting track 42; specifically, a curve guide rail 33 which extends along the left-right direction and is formed by a top surface, a front side surface and a rear side surface is arranged on the right side of the bottom surface of an upper top plate of a connecting cross beam 32, the curve guide rail is provided with an arc section and a straight section, the arc section is arranged on the left side of the straight section, a notch of the arc section is arranged forwards, the left end of the arc section is arranged in front of the right end of the arc section, the left end of the arc section extends out of the front of the connecting cross beam 32, the right end of the arc section and the straight section are both arranged under the upper top plate and are matched with the upper top plate in an attached mode, the left end of the arc section is arranged on the upper top plate in an adjustable mode of left-right translation through a connecting sheet 34, the right end of the straight section is arranged on the upper top plate in an adjustable mode of left-right translation, specifically, the connecting sheet 34 is in an inverted L shape with a transverse part and, go up and all set up the bar mounting hole that extends along left right direction corresponding to horizontal portion and straightway right-hand member department on the roof, all be equipped with on horizontal portion and the straightway and correspond the cooperation lock solid of upwards wearing out the outer bolt of bar mounting hole and nut together, utilize the bar mounting hole can adjusting bolt's mounted position to make whole curve guide rail 33 can suitably adjust the installation about going on, the installation suitability is strong.

The driving mechanism is provided with a driving motor 51, a first rack 52, a second rack 53 and a transmission gear 54, the driving motor 51 is fixedly and horizontally arranged on the top surface of the mounting rail 42, an output shaft of the driving motor 51 is arranged towards the right side or the left side, the transmission gear 54 is horizontally arranged below the mounting rail 42, a gear reversing transmission box 55 which is connected with the transmission gear and drives the transmission gear to rotate is arranged on the output shaft of the driving motor 51, the gear reversing transmission box 55 is a known technology and comprises a box body and a first bevel gear and a second bevel gear which are arranged in the box body, the first bevel gear is vertically arranged and is rotatably arranged in the box body through a first wheel axle, the end part of the first wheel axle is fixedly matched with the output shaft of the driving motor, the second bevel gear is horizontally arranged and is arranged below the first bevel gear and is meshed with the first bevel gear, and a second wheel axle is fixed on the wheel center, the lower end of the second wheel shaft extends out of the box body and penetrates through the mounting rail 42, the transmission gear 54 is fixedly sleeved outside the end part of the second wheel shaft, two guide sliding columns 43 which are arranged in the front and the back are respectively sleeved with a sliding sleeve 55, a mounting block 551 for mounting a carrying frame is locked on the bottom surface of the sliding sleeve 55, the front end of the mounting block 551 of the sliding sleeve 55 positioned in the back extends to the lower part of the sliding sleeve 55 positioned in the front, a first rack 52 extending along the axial direction of the sliding sleeve is fixedly arranged on the back surface of the sliding sleeve 55 positioned in the front, the teeth of the first rack 52 are arranged backwards, a second rack 53 extending along the axial direction of the sliding sleeve is fixedly arranged on the front surface of the sliding sleeve 55 positioned in the back, the teeth of the second rack 53 are arranged forwards, one end part of the first rack 52 and one end part of the second rack 53 are meshed with the transmission gear 54, and the first rack 52 and the second rack 53 are distributed left and right, namely, the first rack 52 is on the left side, the second rack 53 is on the right side, or the first rack 52 is on the right side, the second rack 53 is on the left side, the top surface of the sliding sleeve 55 on the rear side is rotatably mounted with a guide roller 56 which is above the sliding sleeve 55 and is horizontally arranged through a wheel rod, and the guide roller 53 slides into the track of the curved guide rail 33 through the left end port of the curved guide rail 33. When the door opening and closing device is used, the driving motor 51 rotates, the driving motor 51 drives the transmission gear 54 to rotate through the gear reversing transmission box 55, the transmission gear 54 rotates to drive the first rack and the second rack 53 to move horizontally, the first rack and the second rack are driven to move back and forth or move oppositely because the first rack and the second rack are not on the same plane of the transmission gear, the first rack and the second rack correspondingly drive the sliding sleeve 55 to slide, and the sliding of the sliding sleeve 55 can drive the single door body 1 to slide and slide through the door carrying frame to realize the back-to-back translational door opening or opposite translational door closing of the two single door bodies; meanwhile, the guide roller 56 on the sliding sleeve 55 at the rear side correspondingly slides on the curved guide rail 33, and the arc-shaped section of the curved guide rail 33 enables the guide roller 56 to push the sliding frame to move backwards under the influence of the arc-shaped section, so that the whole door body is enabled to move backwards (namely outwards relative to the vehicle), and the translation of opening the door is realized; when the guide roller 56 slides to the straight line section, the whole door body does not integrally translate any more, and correspondingly, when the guide roller 56 slides to the arc section from the straight line section, the whole door body correspondingly translates forwards, so that the translation of closing the door is realized.

Swing arm shafts 6 extending in the up-down direction are respectively arranged below the two fixing frames 41, the two single door bodies 1 are positioned between the two swing arm shafts 6, the swing arm shafts 6 are positioned in front of the single door bodies 1, the upper end parts of the swing arm shafts 6 are rotatably arranged on the mounting bracket, the lower end parts of the swing arm shafts are rotatably arranged on the vehicle body, swing arm transmission mechanisms driving the swing arm shafts to rotate along with the translation of the fixing frames are arranged at the upper ends of the fixing frames 41 and the swing arm shafts 6, and swing arm sliding mechanisms sliding left and right on the single door bodies along with the rotation of the swing arm shafts are arranged at the lower ends of the swing arm shafts and the lower parts of the single door bodies; specifically, the rear ends of the opposite surfaces of the two mounting plates 31 are respectively provided with an opposite lug 312, the lugs 312 are provided with through holes (not shown in the figure) which penetrate through up and down, the central part of the end surface of the upper end of the swing arm shaft 6 extends upwards to form a bearing seat 61 which extends into the through holes and is rotatably mounted in the through holes, the upper end of the swing arm shaft 6 can rotate around the mounting plates 31 by mounting the bearing seat 61, and the rotating mounting mode adopts the prior art; the lower end part of the swing arm shaft 6 is locked with a lower mounting plate 62, the lower mounting plate 62 is provided with an upper transverse part and a rear vertical part which is positioned behind the upper transverse part and is in an inverted L shape, the rear vertical part is attached to the inner side of the vehicle body and is locked on the vehicle body through a bolt, and the lower end face of the swing arm shaft 6 is overlapped on the front end of the upper transverse part and is rotatably mounted on the upper transverse part through a bearing.

the swing arm transmission mechanism is provided with a crank 71 and a connecting rod 72, the crank 71 is of a long strip plate structure with a large end and a small end, the bottom surface of the fixed frame 41 extends downwards to form an L-shaped block 411 with a vertical part and a transverse part, the transverse parts of the L-shaped blocks on the two fixed frames extend oppositely, the transverse part of the L-shaped block 411 on the left side is positioned on the left side of the vertical part, the transverse part of the L-shaped block 411 on the right side is positioned on the right side of the vertical part, the first end of the connecting rod 72 is positioned below the transverse part and is in overlapped fit with the transverse part, the first end and the transverse part of the connecting rod 72 are movably hinged together through a pin shaft, the second end of the connecting rod 72 extends backwards, the end part of the second end of the connecting rod 72 is overlapped on the end part (namely a small end) of the crank and is movably hinged together through a pin shaft, and the end part (namely; thus, when the fixed frame 41 translates, the connecting rod 72 and the crank 71 cooperate to drive the swing arm shaft 6 to rotate around the mounting plate 31 and the lower mounting plate 62.

The swing arm sliding mechanism is provided with a swing arm 81, a rod end joint bearing 82 and a roller 83, the swing arm 81 is an arc-shaped rod body with a backward notch, the first end of the swing arm 81 is fixed on the outer side wall of the lower end of a swing arm shaft 6, namely, the swing arms 81 on the two swing arm shafts 6 are positioned between the two swing arm shafts 6, the second end of the swing arm 81 extends towards the direction of the single door body 1, the front side surface of the lower part of the single door body 1 is provided with a pulley profile 11, the pulley profile 11 is embedded in the single door body 1 and extends along the left and right direction of the single door body, namely, the lower end part of the single door body 1 is recessed backwards and provided with a concave cavity, the pulley profile 11 is fixedly attached in the concave cavity, the front side surface of the pulley profile 11 is matched with the front side surface of the single door body 1, the front side surface of the pulley profile 11 is provided with a strip-shaped groove (not shown in the, rod end joint bearing 82 links together with bearing frame 84, and rod end joint bearing 82's rod end links together with the second end of swing arm 81, and the chucking breach has been seted up to the second end of swing arm 81 promptly, and rod end joint bearing 82's rod end portion imbeds in the chucking breach, and rod portion joint bearing 82 is current product. When the rolling mechanism is used, the swing arm 81 drives the rod end joint bearing 82 to rotate by the rotation of the swing arm shaft 6, and the rotation of the rod end joint bearing 82 can push the roller 83 to horizontally move on the roller profile 11 at a certain distance.

The bus sliding plug door mechanism has the following beneficial effects:

Firstly, opening force applied by the single door body can be distributed at the upper end and the lower end of the single door body by utilizing a specific structure at the upper end and the lower end of the swing arm shaft, so that the upper end and the lower end of each single door body are uniformly stressed, the opening and closing operation of the door bodies is stable, the noise of opening and closing the door is low, and the problem of shaking noise in the door opening and closing process caused by the fact that stress points of the opening force of the traditional door bodies are mainly concentrated at the upper part is solved;

The whole structure is simple, and the limitation of each part in the whole mechanism is easy to realize disassembly and assembly, and easy to maintain and replace;

the whole transmission mechanism has few parts and is easy to install, and compared with the transmission mechanism of the traditional sliding plug door, the opening degree of the vehicle door can be larger;

The driving mechanism is arranged on the two fixing frames, the sliding frame is arranged between the mounting supports, the structure and the position relation of each part are compact in layout, the whole structure is simple, the layout is compact, and excessive space cannot be occupied;

And fifthly, the door body is provided with arm locking force by matching with the swing arm transmission mechanism and the swing arm sliding mechanism, so that the door body is not easy to be opened by other people and is safer to operate.

In the bus sliding plug door mechanism, preferably, the upper groove wall and the lower groove wall of the strip-shaped groove are positioned at the groove opening and provided with the clamping strips 111 which are relatively spaced up and down and extend along the length direction of the strip-shaped groove, the wheel surface of the roller 83 is concavely provided with the closed-loop-shaped groove 831 which surrounds along the circumferential direction of the roller, and the upper clamping strip 111 and the lower clamping strip 111 are correspondingly clamped in the closed-loop-shaped groove 831, so that the offset clearance is smaller when the roller 83 moves by utilizing the structure, the running noise is further reduced, and the installation of the roller 83 is convenient.

preferably, the bearing seat 84 has an integrally formed upper sheet body, a lower sheet body and a rear sheet body located between the upper sheet body and the lower sheet body, the mounting end of the rod end joint bearing (i.e. the end of the rod end joint bearing 82 having the inner ring and the outer ring) is located between the upper sheet body and the lower sheet body and is locked together by the cooperation of a bolt and a nut, the rear sheet body is provided with a mounting through hole 841, the center of the roller 83 is provided with a central through hole extending along the axial direction of the roller, a damping shaft sleeve 85 is sleeved in the central through hole, a roller shaft 86 is sleeved in the damping shaft sleeve 85, one end of the roller shaft 86 penetrates out of the central through hole and is tightly fitted in the mounting through hole, the roller shaft 86 is tightly fitted with the rear sheet body through a gasket sleeved outside the roller shaft; by adopting the structure, the assembly of each part is convenient, and meanwhile, the installation error of the door body can be compensated through the rod end joint bearing 82.

preferably, the rear end of the upper transverse part is provided with two limiting holes 621 arranged at left and right intervals, the outer side wall of the lower end part of the swing arm shaft 6 is convexly provided with a lower lug 60 which is stacked above the rear end of the upper transverse part and can be oppositely overlapped with any limiting hole along with the rotation of the swing arm shaft, the lower lug 60 is provided with an aligning hole (not shown) opposite to the limiting hole, a mounting sleeve 91 is embedded in the aligning hole, a positioning pin 92 is installed in the mounting sleeve 91, the lower end part of the positioning pin 92 is convexly provided with a convex arc part 921 extending out of the lower lug into the limiting hole, a compression spring 93 is sleeved outside the positioning pin 92, the inner side wall of the lower end of the mounting sleeve 91 is convexly provided with a supporting ring, the convex arc part of the positioning pin 92 passes through the inner ring hole of the supporting ring to the outside of the lower lug, the outer side wall of the top end of the positioning pin 92 is convexly provided, the nut cap 94 above the positioning pin is installed in the upper end port of the mounting sleeve 91, the nut cap 94 is used for pressing the compression spring in the mounting sleeve 91, when the swing arm shaft 6 rotates in application, the positioning pin 92 rotates correspondingly, the compression spring 93 is pressed by the tight fit of the convex arc part and the upper transverse part, when the positioning pin 92 rotates into one limiting hole, the compression spring 93 is released, the positioning pin 92 moves downwards, the lower end part of the convex arc part falls into the limiting hole to realize positioning, the swing arm shaft 6 is limited to rotate freely, correspondingly, the convex arc part can be smoothly separated from the limiting hole to be positioned in the other limiting hole by using the arc structure of the convex arc part, thus, the swing arm shaft in the door closing and opening states can be limited by using the structure, the use safety is improved, and the stability of the swing arm shaft is improved.

Preferably, a synchronous swing arm shaft 95 is arranged between the two mounting plates 31, the end parts of the two ends of the synchronous swing arm shaft 95 are correspondingly rotatably mounted in the two mounting plates 31 through bearings, the synchronous swing arm shaft 95 is positioned above the front guide strut 55, the two ends of the synchronous swing arm shaft 95 are externally sleeved with a connecting swing arm 96 which extends downwards, the lower end of the connecting swing arm 96 is positioned in front of the front guide strut 55 and is mounted on the front end of the fixing frame 41 through a bolt; the translation of the fixing frame 41 adopting the structure drives the synchronous swing arm shaft 95 to rotate through the connecting swing arm 96, so that the synchronous swing arm shaft in the front can transmit the force to the front except the stress of the guide roller at the rear when the driving mechanism horizontally translates the sliding frame in the process of plugging and pulling the vehicle door, the stress of the driving mechanism in the horizontal direction is uniform, the uniform and stable stress of the assembly of two single door plates in the opening process of the door body is realized, and the stable operation of the door body is further protected.

the product form of the present invention is not limited to the embodiments and examples shown in the present application, and any suitable changes or modifications of the similar ideas should be made without departing from the patent scope of the present invention.