Inner swing door driving device, door system and vehicle

Abstract

The invention discloses an inner swing door driving device, a door system and a vehicle, the inner swing door driving device comprises a rack, a stand column, a motor assembly, a bearing seat and a lead screw, the stand column is installed on the lead screw in a swing mode through a swing rod assembly and a nut assembly, and one end of the lead screw is fixedly connected with the motor output end of the motor assembly; when the motor assembly drives the lead screw to rotate, the nut assembly drives the stand column to swing through the swing rod assembly, and door leaf opening and closing movement is achieved. The driving component is always connected with the transmission component, so that the motor can drive the door leaf to be in a closed state under the abnormal conditions of insufficient air pressure or air leakage of an air channel, the situation that the door leaf is opened abnormally is avoided, potential safety hazards are reduced, and the running reliability of a vehicle is improved.

Description

Technical Field

[0001] The invention relates to a city public transportation vehicle and a door system, and in particular to an inner swing door driving device, a door system and a vehicle. Background Art

[0002] Most electric inner swing door drive devices are swing-type clutch unlocking structures. The two electric swing door drive mechanisms disclosed in Chinese patents CN216866383U and CN210067792U use a self-locking motor as a driving source to achieve full-range locking during the movement of the door leaf, and use a motor swing scheme to achieve the clutch of the locking motor gear and the main gear to meet the emergency unlocking requirements of the door system. The locking principle of the above locking scheme is simple, but when the cylinder or the tension spring fails, the locking motor will be separated from the main gear, so that the door system cannot maintain the locked state and will open abnormally, threatening the personal safety of vehicle passengers. In addition, the single drive device in Chinese patent CN210067792U realizes the linkage of two doors through a crank connecting rod. In an emergency, if one door is blocked, the other door cannot be opened, which creates a huge safety hazard. In addition, the driver cannot know the location and cause of the fault in the event of a fault, which causes inconvenience to fault inspection and recovery. Summary of the invention

[0003] Purpose of the invention: The present invention aims to provide an inner swing door drive device which ensures that the motor-driven door leaf remains in a closed state under abnormal conditions such as insufficient air pressure or air leakage in the air circuit; another object of the present invention is to provide a door system and a vehicle containing the above-mentioned inner swing door drive device.

[0004] Technical solution: The inward swing door driving device described in the present invention includes a frame, a column, a motor assembly, a bearing seat, and a screw rod. The column is swingably mounted on the screw rod through a rocker arm assembly and a nut assembly. One end of the screw rod is fixedly connected to the motor output end of the motor assembly, and the other end is fixedly mounted on the frame through the bearing seat. When the motor assembly drives the screw rod to rotate, the nut assembly drives the column to swing through the rocker arm assembly to realize the opening and closing movement of the door leaf.

[0005] Furthermore, the nut assembly includes upper / lower studs, upper / lower rollers and a nut sleeve, the rollers are installed at both ends of the nut sleeve through the studs, the bearing is located between the lower roller and the lower stud on the side of the nut sleeve close to the frame, and the bearing is rollingly installed in the guide groove of the frame.

[0006] Furthermore, the inner swing door driving device also includes an in-place switch assembly, and the nut assembly also includes a trigger plate, which is located on the side of the nut sleeve close to the in-place switch assembly. When the door is closed, the nut sleeve moves to the door closing position, and the trigger plate triggers the in-place switch assembly.

[0007] Furthermore, the swing arm assembly is a U-shaped structure, and the rollers of the nut assembly are respectively installed in the upper / lower waist holes of the swing arm assembly. When the swing arm assembly swings, the two rollers slide synchronously.

[0008] Furthermore, the inner swing door drive device also includes a locking assembly fixed above the motor assembly and a gear installed on the screw rod, the locking assembly includes a locking mounting plate, a cylinder, a trigger shaft, a connecting shaft, a rack rocker and a locking switch, the protruding end of the cylinder is fixedly connected to the rear end of the connecting shaft, the front end of the connecting shaft is fixedly connected to the trigger shaft, a connecting rod is installed on the trigger shaft, the other end of the connecting rod is hinged to the swing end of the gear rocker through a pin shaft, the rotating end of the gear rocker is rotatably mounted on the locking mounting plate through a positioning shaft, the rack of the gear rocker is meshed with the gear, and the tooth width direction overlaps symmetrically; the end of the trigger shaft is inserted into the limit slot of the locking mounting plate, the trigger point of the locking switch is located at one end of the limit slot to form a trigger end, and the other end of the limit slot is the release end.

[0009] Furthermore, the gear rocker is a T-shaped structure, with through holes on both sides of the gear rocker to form a swing end and a rotation end, and the rack under the gear rocker is inserted through the locking mounting plate.

[0010] Furthermore, a locking spring is provided at the extended end of the cylinder, and the locking spring is located between the cylinder body and the connecting shaft.

[0011] Furthermore, the rocker arm assembly includes a U-shaped rocker arm and a clamping block, the U-shaped rocker arm is provided with upper / lower through holes and upper / lower waist holes, the clamping block is provided with a positioning hole coaxial with the upper / lower through holes, and the column is penetrated with the positioning hole and the upper / lower through holes.

[0012] The door system of the present invention comprises a door sill, a door leaf and the above-mentioned inner swing door driving device.

[0013] The vehicle of the present invention comprises a vehicle body, and the vehicle body is equipped with a door system, which is the above-mentioned door system.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: 1. The driving component of the present invention is always connected to the transmission component to ensure that under abnormal conditions such as insufficient air pressure or air leakage in the air path, the motor can drive the door leaf to remain closed, avoiding abnormal opening of the door leaf, reducing safety hazards, and improving vehicle operation reliability; 2. The present invention adopts an independent locking unit to separate the driving function from the locking function, avoiding the driving component from directly bearing the reaction force of the door system, thereby increasing service life and reducing maintenance and repair costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the inner swing door driving device;

[0016] Figure 2 is a structural schematic diagram of a nut assembly;

[0017] Figure 3 It is a structural schematic diagram of the locking assembly in a locked state;

[0018] Figure 4 It is a structural schematic diagram of the unlocked state of the locking component;

[0019] Figure 5 is a structural schematic diagram of a swing rod assembly;

[0020] Figure 6 It is the structural diagram of the gear swing rod;

[0021] Figure 7 is a schematic diagram of the lock switch in the unlocked state;

[0022] Figure 8 A schematic diagram of a locking switch when the locking assembly is in a locked state;

[0023] Fig. 9 is a schematic diagram of the structure of the motor assembly;

[0024] Fig.10 It is a top view of the inner swing door driving device in a free state;

[0025] Fig.11 A top view of the inner swing door drive device in a closed and locked state;

[0026] Fig.12 It is a top view of the inner swing door drive device in the open and locked state. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] The inner swing door driving device of the present invention comprises a frame 1, a column 2, a swing rod assembly 3, a locking assembly 4, a motor assembly 5, a bearing seat 6, a screw rod 7, a nut assembly 8, an in-position switch assembly 9 and a gear 10. The frame 1 is fixedly connected to the vehicle body, a guide groove 101 is provided at the lower part of the frame 1, a mounting seat 501 is fixedly installed on the frame 1, a motor 502 is fixedly installed on the mounting seat 501, one end of the screw rod 7 is fixedly connected to the motor output end 503, and the other end is fixedly connected to the bearing seat 6, and the bearing seat 6 is fixedly installed on the frame 1; the nut assembly 8 is installed on the screw rod 7, and is driven by the screw rod 7 to reciprocate along the axial direction of the screw rod; the nut assembly 8 is hinged to the swing arm assembly 3; the swing rod assembly 3 is fixedly connected to the column 2, the motor assembly 5 drives the screw rod 7 to rotate, and the nut assembly 8 transmits the driving force to the column 2 through the swing rod assembly 3 to realize the door leaf opening and closing movement. The locking assembly 4 is fixed above the motor assembly 5. The gear 10 is fixed to one end of the screw rod 7 close to the motor assembly 5 and symmetrically overlaps with the rack 4083 of the locking assembly 4 in the tooth width direction.

[0029] The nut assembly 8 includes an upper stud 801, an upper roller 802, a nut sleeve 803, a baffle 804, a trigger plate 805, a nut 806, a lower roller 807, a bearing 808 and a lower stud 809. The upper stud 801 is fixed to the upper part of the nut sleeve 803, the upper roller 802 is fixedly connected to the upper stud 801, the lower stud 809 is fixed to the lower part of the nut sleeve 803, the lower roller 807 and the bearing 808 are fixedly connected to the lower stud 809, the upper roller 802 is installed in the upper waist hole 3012 of the swing rod 301, and the lower roller 807 is installed in the lower waist hole 3014. The upper and lower rollers are coaxial and slide synchronously in the waist hole. The bearing 808 is installed in the guide groove 101 at the lower part of the frame 1 to ensure that the nut assembly 8 moves stably along the axial direction of the screw rod 7 without deflection.

[0030] The nut sleeve 803 is fixedly connected to the nut 806, and baffles 804 and trigger plates 805 are fixed at both ends of the nut sleeve 803 to restrict the relative sliding of the nut 806 and the nut sleeve 803. The trigger plate 805 is installed toward one end of the motor assembly 5, and will move along the axial direction of the screw rod to approach the switch assembly 9 when the door is closed.

[0031] The swing arm assembly 3 includes a swing arm 301 and a clamping block 302. The swing arm 301 is in a U-shaped structure, the clamping block 302 is placed in the middle of the U-shaped structure and is fixedly connected to the swing arm 301, and the column 2 passes through a positioning hole 3021 and is fixedly connected to the clamping block 302. The positioning hole 3021 is coaxial with the upper through hole 3011 and the lower through hole 3013 on the swing arm 301.

[0032] The locking assembly 4 includes a locking mounting plate 401, a trigger shaft 402, a connecting shaft 403, a locking spring 404, a cylinder 405, a connecting rod 406, a positioning shaft 407, a rack rocker 408, a pin 409 and a locking switch 410. The locking assembly 4 is fixed above the motor assembly 5. The gear 10 is fixed to one end of the screw rod 7 close to the motor assembly 5, and symmetrically overlaps with the rack 4083 of the locking assembly 4 in the tooth width direction. A cylinder 405 is fixedly installed on the outer side of the locking mounting plate 401, the rear end of the connecting shaft 403 is fixedly connected to the extended end of the cylinder 405, and the front end is fixedly connected to the trigger shaft 402, and the locking spring 404 is installed between the connecting shaft 403 and the cylinder 405, and is coaxial with the extended end of the cylinder; the end of the trigger shaft 402 passes through the limit groove 4012 and extends to the outside of the locking mounting plate 401, which is used to trigger the locking switch 410, one end of the connecting rod 406 is hinged to the trigger shaft 402, and the other end is hinged to the swing end 4082 of the gear rocker 408 through the pin shaft 409, the positioning shaft 407 is fixedly installed on the locking mounting plate 401, and the rotating end 4081 of the rocker is hinged to the positioning shaft 407.

[0033] The gear rocker 408 is a T-shaped structure, with through holes on both sides of the gear rocker 408 forming a swing end 4082 and a rotation end 4081 , and a rack 4083 below the gear rocker 408 is penetrated through the locking mounting plate 401 .

[0034] The door system of the present invention comprises a door sill, a door leaf and the above-mentioned inner swing door driving device.

[0035] The vehicle of the present invention comprises a vehicle body, and the vehicle body is equipped with a door system, which is the above-mentioned door system.

[0036] When ventilated, the cylinder 405 is ventilated and retracted, driving the trigger shaft 402 hinged with the connecting shaft 403 to move toward the trigger point 4011, and the trigger shaft 402 drives the connecting rod 406 to swing, and the connecting rod 406 drives the swing end 4082 of the rack rocker 408 to swing downward with the rotating end 4081 as the center, and the rack 4083 at the lower end of the rocker engages with the gear 10 to constrain and lock the screw rod 7. At the same time, when the trigger shaft 402 moves to the trigger end 4011, the locking switch 410 is triggered, and a locking signal is generated and fed back to the door controller.

[0037] When the air is cut off, the connecting shaft 403 is pushed by the locking spring 404 to move toward the release point 4013, driving the connecting rod 406 hinged thereto to pull the swing end 4082 of the rack rocker 408 to move, and the rack rocker 408 swings around the rotating end 4081, and the rack 4083 at the lower end of the rocker swings and disengages from the gear 10, and the screw rod 7 is unlocked, which can drive the nut assembly 8 to reciprocate.

[0038] Locking:

[0039] When the door is fully closed or fully opened, the cylinder 405 is ventilated and retracted, and the rack 4083 swings downward to mesh with the gear 10, restricting the rotation of the screw rod 7 to complete the locking action. At the same time, the trigger shaft 402 moves to the trigger end 4011 to trigger the locking switch 410, and the locking switch 410 transmits a signal to the door controller, which controls the motor assembly 5 to stop.

[0040] Opening the door:

[0041] When the door controller receives the door opening signal, the air cylinder 405 is de-energized, and the rack 4083 at the lower end of the rocker arm swings and disengages from the gear 10; the motor assembly 5 performs the door opening action, drives the screw rod 7 to rotate, and the screw rod 7 drives the nut assembly 8 to transmit the driving force to the rocker arm assembly 3, driving the column 2 to rotate around its own axis to realize the door opening movement; when the door controller recognizes that the door leaf is in place, the air cylinder 405 is controlled to be ventilated and retracted, and the rack 4083 at the lower end of the rocker arm meshes with the gear 10 to form a constraint lock. At the same time, when the trigger shaft 402 moves to the trigger end 4011, the locking switch 410 is triggered, and a locking signal is generated to the door controller, and the door controller controls the motor assembly 5 to stop rotating to complete the door opening action.

[0042] close the door:

[0043] When the door controller receives the door closing signal, the air cylinder 405 is de-energized, and the rack 4083 is disengaged from the gear 10; the motor assembly 5 performs the door closing action, drives the screw rod 7 to rotate, and the screw rod 7 drives the nut assembly 8 to transmit the driving force to the rocker assembly 3, driving the column 2 to rotate to realize the door opening movement; the nut sleeve 8 translates to approach the door closing position, triggering the in-position switch assembly 9; when the door controller recognizes the door leaf in-position signal, the air cylinder 405 is controlled to be ventilated and retracted, and the rack 4083 is meshed with the gear 10 to form a constraint lock. At the same time, when the trigger shaft 402 triggers the locking switch 410, a locking signal is generated to the door controller, and the door controller controls the motor assembly 5 to stop rotating to complete the door closing action.

[0044] Emergency unlock:

[0045] When the emergency unlocking device is operated, the air is cut off, the locking compression spring 404 is released, the cylinder 405 extends, the rack 4083 swings upward and disengages from the gear, and the drive device is unlocked; the door is pushed manually, and the door leaf opens to complete the emergency unlocking.

[0046] Unexpected door opening:

[0047] 1. When the vehicle is at low speed or stationary, the system or component fails and the door system is accidentally unlocked. At this time, the door controller does not recognize the emergency unlocking and door opening signals, but the in-place switch component 9 accidentally loses the signal due to the door leaf activity, and then it can be determined that the door system is in an abnormal unlocking state. The door controller controls the motor component 5 to rotate and keep the door leaf locked to ensure the safety of passengers.

[0048] 2. During the driving of the vehicle, the cylinder 405 is accidentally cut off due to a gas line fault, and the locking switch 410 releases a lost locking signal. At this time, the door controller recognizes that the vehicle is in a driving state and the in-place switch assembly 9 accidentally loses the signal due to the door leaf activity, and it can be determined that the door system is about to open abnormally. The door controller controls the motor assembly 5 to rotate and block, keeping the door leaf locked to ensure the safety of passengers.

[0049] Intelligent anti-pinch:

[0050] An in-position switch assembly 9 is provided on the frame 1. When the screw rod 7 drives the nut assembly 8 along the screw rod axis to approach the door closing in-position state, the trigger plate 805 installed on the nut assembly 8 will trigger the in-position switch assembly 9 and send an in-position signal to the door controller.

[0051] The motor 502 is a brushless motor with a Hall sensor inside. The Hall sensor can detect the number of rotations and speed of the motor and transmit them to the door controller in real time, thereby determining the movement position and status of the door leaf.

[0052] If an obstacle is encountered when opening or closing the door, the current and speed of the motor will change. The door controller will make a judgment based on the motor speed, current signal, in-place switch signal and door leaf position, thereby realizing the intelligent anti-pinch function.

Claims

1. An inner swing door driving device, comprising a frame (1), a column (2), a motor assembly (5), a bearing seat (6), and a screw rod (7), characterized in that: The upright post (2) is swingably mounted on the screw rod (7) via a swing rod assembly (3) and a nut assembly (8); one end of the screw rod (7) is fixedly connected to the motor output end (503) of the motor assembly (5), and the other end is fixedly mounted on the frame (1) via a bearing seat (6); when the motor assembly (5) drives the screw rod (7) to rotate, the nut assembly (8) drives the upright post (2) to swing via the swing rod assembly (3), thereby realizing the opening and closing movement of the door leaf.

2. The inner swing door driving device according to claim 1, characterized in that: The nut assembly (8) comprises an upper / lower stud, an upper / lower roller and a nut sleeve (803); the roller is mounted on both ends of the nut sleeve (803) via the stud; the bearing (808) is located between the lower roller (807) and the lower stud (809) on the side of the nut sleeve (803) close to the frame (1); and the bearing (808) is rollingly mounted in a guide groove (101) of the frame (1).

3. The inner swing door driving device according to claim 2, characterized in that: The inner swing door driving device further comprises an in-position switch assembly (9), and the nut assembly (8) further comprises a trigger plate (805), wherein the trigger plate (805) is located on a side of the nut sleeve (803) close to the in-position switch assembly (9); when the door is closed, the nut sleeve (803) moves to a door closing position, and the trigger plate (805) triggers the in-position switch assembly (9).

4. The inner swing door driving device according to claim 2, characterized in that: The swing arm assembly (3) is a U-shaped structure, and the rollers of the nut assembly (8) are respectively installed in the upper / lower waist holes of the swing arm assembly (3). When the swing arm assembly (3) swings, the two rollers slide synchronously.

5. The inner swing door driving device according to claim 1, characterized in that: The invention also comprises a locking assembly (4) fixed above the motor assembly (5) and a gear (10) mounted on the screw rod, wherein the locking assembly (4) comprises a locking mounting plate (401), a cylinder (405), a trigger shaft (402), a connecting shaft (403), a rack rocker (408) and a locking switch (410), wherein the protruding end of the cylinder (405) is fixedly connected to the rear end of the connecting shaft (403), the front end of the connecting shaft (403) is fixedly connected to the trigger shaft (402), a connecting rod (406) is mounted on the trigger shaft (402), and the other end of the connecting rod (406) is connected to the trigger shaft (402) through a pin shaft (409). The trigger shaft (402) is hinged to the swing end (4082) of the gear swing rod (408); the rotating end (4081) of the gear swing rod (408) is rotatably mounted on the locking mounting plate (401) via a positioning shaft (407); the rack (4083) of the gear swing rod (408) is meshed with the gear (10), and the tooth width direction is symmetrically overlapped; the end of the trigger shaft (402) is penetrated by a limiting groove (4012) of the locking mounting plate (401); the trigger point of the locking switch (410) is located at one end of the limiting groove (4012) to form a trigger end (4011); and the other end of the limiting groove (4012) is a release end (4013).

6. The inner swing door driving device according to claim 5, characterized in that: The gear swing rod (408) is a T-shaped structure, and through holes are opened on both sides of the gear swing rod (408) to form a swing end (4082) and a rotating end (4081), and a rack (4083) below the gear swing rod (408) is penetrated by the locking mounting plate (401).

7. The inner swing door driving device according to claim 5, characterized in that: The extended end of the cylinder (405) is provided with a locking spring (404), and the locking spring (404) is located between the cylinder body and the connecting shaft (403).

8. The inner swing door driving device according to claim 1, characterized in that: The swing arm assembly (3) comprises a U-shaped swing arm (301) and a clamping block (302); the U-shaped swing arm (301) is provided with an upper / lower through hole and an upper / lower waist hole; the clamping block (302) is provided with a positioning hole (3021) coaxial with the upper / lower through hole; and the column (2) is penetrated through the positioning hole (3021) and the upper / lower through hole.

9. A door system, comprising a door threshold and a door leaf, characterized in that: It also includes the inner swing door driving device as described in claims 1 to 8.

10. A vehicle, comprising a vehicle body, characterized in that: The vehicle body is equipped with a door system, and the door system is the door system according to claim 9.

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