CN106333536B

CN106333536B - Automatic folding seat

Info

Publication number: CN106333536B
Application number: CN201610993498.5A
Authority: CN
Inventors: 王洪奇; 孔凡昌; 解鹏程; 李洪波; 陈乃龙; 何秀全; 王宏; 丁涛
Original assignee: Nanjing Kangni Mechanical and Electrical Co Ltd; CRRC Tangshan Co Ltd
Current assignee: Nanjing Kangni Mechanical and Electrical Co Ltd; CRRC Tangshan Co Ltd
Priority date: 2016-11-10
Filing date: 2016-11-10
Publication date: 2023-06-23
Anticipated expiration: 2036-11-10
Also published as: CN106333536A

Abstract

The invention discloses an automatic folding seat, which comprises a seat plate capable of rotating, a locking system and a controller for controlling the seat plate to rotate, wherein the locking system comprises an upper locking device and a lower locking device; when the seat board rotates to a flat state, the upper locking device automatically locks the seat board; when the seat board rotates to a turned-up state, the lower locking device automatically locks the seat board. The invention has simple structure, good stability and low cost.

Description

Automatic folding seat

Technical Field

The invention relates to a seat, in particular to an automatic folding seat.

Background

With the development of scientific technology, an automatic folding seat has been developed and applied to various occasions. The seat board of the automatic folding seat can be automatically turned up or put down under the control of the controller. However, the automatic folding seat in the prior art often cannot realize locking when the seat plate is in a flat state or in a turned state, and has a complex structure, poor stability and high cost.

Disclosure of Invention

The invention aims to: the invention aims to provide an automatic folding seat which can realize locking when a seat board is in a flat state or in a turned state, and has the advantages of simple structure, good stability and low cost.

The technical scheme is as follows: the invention relates to an automatic folding seat, which comprises a seat board capable of rotating, a locking system and a controller for controlling the seat board to rotate, wherein the locking system comprises an upper locking device and a lower locking device; when the seat board rotates to a flat state, the upper locking device automatically locks the seat board; when the seat board rotates to a turned-up state, the lower locking device automatically locks the seat board.

Further, the structure of the upper locking device is the same as that of the lower locking device, the upper locking device comprises a rotatable trigger mechanism, a driving mechanism for driving the trigger mechanism to rotate, a switch and a rotatable locking mechanism, the trigger mechanism comprises a reset part for resetting the trigger mechanism, the trigger mechanism can trigger the switch to send an unlocking signal to the controller in the rotating process, the locking mechanism is movably connected with the trigger mechanism, when the locking mechanism and the trigger mechanism relatively rotate, the locking mechanism and the trigger mechanism can be separated, and the locking pin can push the locking mechanism to rotate and can be fixed with the locking mechanism. The locking of the lock pin can be realized, the manual control of the driving mechanism can also be realized, the trigger mechanism is driven to rotate and the trigger switch sends an unlocking signal to the controller, so that the trigger mechanism is separated from the locking mechanism, and the controller controls the lock pin to rotate, thereby realizing the functions of manual unlocking and controlling the lock pin to rotate; the trigger mechanism can be separated from the locking mechanism directly by manual rotation, so that the functions of manually unlocking and manually rotating the lock pin are realized, and the trigger mechanism is particularly useful in the case of failure of the driving mechanism or power failure of the whole system.

Further, trigger mechanism still includes thumb nail, switch board and pivot, and thumb nail and switch board are all fixed in the pivot, and reset part cover is located in the pivot, and the switch board can trigger the switch and send unlocking signal to the controller at pivoted in-process, is equipped with the first draw-in groove that is used for the block thumb nail on the locking mechanism.

Further, the locking mechanism comprises a locking fork and a rotating shaft, and a first clamping groove for clamping the triggering mechanism and a second clamping groove for clamping the locking pin are formed in the locking fork.

Further, a third clamping groove for clamping the triggering mechanism is further formed in the lock fork, and when the triggering mechanism rotates to a position capable of triggering the switch, the triggering mechanism is clamped into the third clamping groove. Thus, the stability of the locking mechanism can be improved, and the locking fork can be accurately rotated to a certain position without shaking left and right.

Further, the locking mechanism comprises a rotating shaft, and a rotating component is sleeved on the rotating shaft. The continuous rotation part can enable the locking mechanism to rotate for a distance under the drive of the lock pin, and the lock pin can continue to rotate for a distance after leaving the locking mechanism, so that the lock pin can be conveniently clamped into the locking mechanism again.

Further, the driving mechanism comprises an electromagnet and an attracting component which can be attracted by the electromagnet, and the attracting component is connected with the triggering mechanism.

Further, the device also comprises a damper, wherein one telescopic end of the damper is connected with the rotating shaft of the seat board, and the other end of the damper is rotationally fixed. Therefore, the influence of the weight of the seat board can be overcome, the motion impact is eliminated, and the safety is improved.

Further, the seat plate driving device also comprises a motor capable of driving the seat plate to rotate, and the motor is controlled by a controller.

Further, the controller detects the current of the motor, and in the process of rotating the motor, the anti-extrusion method is executed according to the following steps:

s1: judging whether the current detected at this time exceeds a preset current: if yes, performing step S2; otherwise, repeating the step S1;

s2: judging whether the currents detected continuously for N times exceed preset currents or not, wherein N is preset times: if yes, go on step S3; otherwise, controlling the motor to stop rotating, maintaining the stop state within the preset time, controlling the motor to resume rotating after the preset time is over, and returning to the step S1 to continue detecting;

s3: and the control seat board returns to the initial position of the current movement.

The beneficial effects are that: the invention discloses an automatic folding seat, which can realize locking when a seat board is in a flat state through an upper locking device and can realize locking when the seat board is in a turned-up state through a lower locking device. Simple structure, good stability and low cost.

Drawings

FIG. 1 is a side view of a seat in an embodiment of the present invention;

FIG. 2 is a rear view of a seat in an embodiment of the invention;

FIG. 3 is a top view of a seat in an embodiment of the invention;

FIG. 4 is a schematic view of a locking system when a seat pan is laid flat according to an embodiment of the present invention;

FIG. 5 is a schematic view of the locking system when the seat pan is turned up in accordance with the embodiment of the present invention;

FIG. 6 is a front view of the upper locking device in an embodiment of the present invention;

FIG. 7 is a view in the A-A direction of FIG. 6;

FIG. 8 is a side view of the upper locking means in an embodiment of the present invention;

FIG. 9 is a schematic view of the structure of the isolation locking system when the seat pan is laid flat according to the embodiment of the present invention;

FIG. 10 is a schematic view of the isolation locking system when the seat pan is flipped up in accordance with an embodiment of the present invention;

FIG. 11 is a front view of an upper isolation lock in an embodiment of the present invention;

FIG. 12 is a top view of an upper isolation lock in an embodiment of the present invention;

FIG. 13 is a schematic view of a seat with a damper according to an embodiment of the present invention;

FIG. 14 is a schematic view of a second stage worm gear assembly and associated structure with the second stage worm gear shaft in "engaged" with the output shaft in accordance with an embodiment of the present invention;

FIG. 15 is a schematic view of a seat with a cylinder assembly according to an embodiment of the present invention;

fig. 16 is a schematic view of a cylinder according to an embodiment of the present invention.

Detailed Description

The technical scheme of the invention is further described below with reference to the accompanying drawings and the specific embodiments.

The embodiment discloses an automatic folding seat, which comprises a seat back 1 and a seat plate 3, as shown in figure 1. A seat board rotating shaft 21 is arranged between the seat back 1 and the seat board 3, as shown in fig. 2, the seat board rotating shaft 21 passes through a seat bearing 22, and the seat bearing 22 and the seat back 1 are fixed together. The chair back 1 is provided with an upper locking device 11, an emergency operation device 13, a disconnecting switch 14 and a controller 15. A lower fixing plate 4 is connected below the chair back 1, and a lower locking device 41 and a motor 44 are arranged on the lower fixing plate 4. Wherein the upper locking means 11 and the lower locking means 41 together constitute a locking system. An isolation locking system 1243 is also provided between the seat back 1 and the lower fixed plate 4, as shown in fig. 2. A lower baffle 6 is also arranged below the chair back 1 and is used for protecting each device below the chair back 1. Furthermore, a damper 5 may be provided on the seat, as shown in fig. 2 and 3. Fig. 13 shows a schematic structure of the damper 5, and the seat back 1 is not shown in fig. 13. In fig. 13, a first transition plate 531 is disposed on the seat board 3, the first transition plate 531 is coplanar with the seat board 3, the side portion of the first transition plate 531 extends out of a second transition plate 532 at an angle, a second pin 521 is disposed on the second transition plate 532, the second pin 521 is connected to the telescopic end of the damper 5, and the other end of the damper 5 is connected to the mounting seat 52 through a first pin 511. Fig. 13 shows two cases where the seat plate 3 is in the flat state and the flipped up state.

The damper 5 of fig. 13 may also be replaced with a cylinder assembly comprising a cylinder as shown in fig. 15 and a solenoid valve as shown in fig. 16. The cylinder comprises a cylinder body 81 and a piston rod 82, the cylinder body 81 is rotationally fixed, one end of the piston rod 82 is arranged inside the cylinder body 81, and the other end of the piston rod 82 is connected with the seat board rotating shaft 21.

In addition, the controller 15 detects the current of the motor 44, and performs the anti-squeeze method during the rotation of the motor 44 according to the following steps:

s2: judging whether the currents detected continuously for N times exceed preset currents or not, wherein N is preset times: if yes, go on step S3; otherwise, the motor 44 is controlled to stop rotating, and the stop state is maintained in a preset time, and after the preset time is over, the motor 44 is controlled to resume rotating, and the step S1 is returned to continue detecting;

s3: the control seat plate 3 returns to the initial position of the current movement.

The structure and operation of the locking system and isolation locking system 1243, respectively, are described below.

1. Locking system

As shown in fig. 4 and 5, the locking system includes an upper locking device 11, a lower locking device 41, and a locking pin 31 provided between the upper locking device 11 and the lower locking device 41. One end of the lock pin 31 is fixed to the end of the seat plate 3 near the seat back 1, and as shown in fig. 3, the other end of the lock pin 31 is a free end, and the lock pin 31 is coplanar with the seat plate 3. The lock pin 31 comprises two parallel longitudinal bars, and a plurality of transverse bars are arranged between the two longitudinal bars in parallel. After the controller 15 controls the motor 44 to rotate, the motor 44 drives the seat plate 3 to rotate, and the lock pin 31 rotates along with the seat plate 3.

The upper locking means 11 and the lower locking means 41 are of the same construction. The upper locking device 11 includes an upper locking drive mechanism, an upper locking trigger mechanism, an upper locking mechanism, a first micro switch 116, and an upper lock body 1112, as shown in fig. 4, 5, and 6. The upper locking driving mechanism includes an upper electromagnet 111 and an upper engaging member 1113, as shown in fig. 7, a housing of the upper electromagnet 111 is fixed on the upper lock body 1112, an emergency operation device 13 is provided on the seat, the upper electromagnet 111 can be started by operating the emergency operation device 13, and the upper engaging member 1113 can be made of ferromagnetic material. The upper lock triggering mechanism includes an upper lock triggering mechanism rotating shaft 114 fixed on the upper lock body 1112, and an upper pawl 112 and a first switch board 113 are fixedly disposed on the upper lock triggering mechanism rotating shaft 114, as shown in fig. 6, and one end of the upper pawl 112 is connected to an upper suction member 1113 through an upper connecting member 1115, as shown in fig. 7. An upper lock reset mechanism is also sleeved on the upper lock trigger mechanism rotating shaft 114, and the upper lock reset mechanism can adopt a first torsion spring 115. The locking mechanism comprises a locking fork rotating shaft 118 fixed on the locking body 112, a locking fork 117 is fixedly arranged on the locking fork rotating shaft 118, and a second torsion spring 119 is sleeved on the locking fork rotating shaft 118. The upper locking fork 117 is provided with an upper first clamping groove 1110 and an upper second clamping groove 1111, the other end of the upper pusher dog 112 can be clamped in the upper first clamping groove 1110, and the cross bar at the free end of the locking pin 31 can be clamped in the upper second clamping groove 1111. In order to improve stability of the upper locking mechanism, so that the locking fork 117 can be precisely rotated to a certain position without shaking left and right, an upper third clamping groove 1114 may be further provided on the locking fork 117, as shown in fig. 7. The first microswitch 116 is fixed to the upper lock 1112 as shown in figure 8.

Similarly, the lower latch device 41 includes a lower latch drive mechanism, a lower latch trigger mechanism, a lower latch mechanism, a second micro switch 416, and a lower latch body 4112, as shown in fig. 4 and 5. The lower locking driving mechanism includes a lower electromagnet 411 and a lower engaging member (not shown), wherein a housing of the lower electromagnet 411 is fixed on a lower lock body 4112, an emergency operation device 13 is arranged on the seat, and a switch for starting the lower electromagnet 411 can be started by operating the emergency operation device 13, and the lower engaging member (not shown) can be made of ferromagnetic material. The lower locking triggering mechanism comprises a lower locking triggering mechanism rotating shaft 414 fixed on a lower lock body 4112, a lower pusher dog 412 and a third switch plate 413 are fixedly arranged on the lower locking triggering mechanism rotating shaft 414, and one end of the lower pusher dog 412 is connected with a lower suction component (not shown) through a lower connecting component (not shown). The lower locking trigger mechanism rotating shaft 414 is also sleeved with a lower locking reset mechanism, and the lower locking reset mechanism can adopt a third torsion spring 415. The lower locking mechanism comprises a lower locking fork rotating shaft 418 fixed on a lower locking body 4112, a lower locking fork 417 is fixedly arranged on the lower locking fork rotating shaft 418, and a fourth torsion spring 419 is sleeved on the lower locking fork rotating shaft 418. The lower lock fork 417 is provided with a lower first clamping groove 4110 and a lower second clamping groove 4111, the other end of the lower pusher dog 412 can be clamped in the lower first clamping groove 4110, and the cross bar at the free end of the lock pin 31 can be clamped in the lower second clamping groove 4111. In order to improve stability of the lower locking mechanism, the lower locking fork 417 can be precisely rotated to a certain position without shaking left and right, and a lower third clamping groove (not shown) may be further provided on the lower locking fork 417. The third microswitch 416 is fixed to the lower lock 4112.

The operation of the locking system is described below:

when the seat plate 3 is in the flat state, as shown in fig. 4, the cross bar at the free end of the lock pin 31 is engaged in the upper second slot 1111 of the upper lock fork 117, the other end of the upper finger 112 is engaged in the upper first slot 1110 of the upper lock fork 117, the lower finger 412 is disengaged from the lower first slot 4110 of the lower lock fork 417, and the lower second slot 4111 of the lower lock fork 417 faces upward. If the lower lock fork 417 is further provided with a lower third clamping groove 4114, then the lower pawl 412 is clamped in the lower third clamping groove (not shown) of the lower lock fork 417. When the seat board 3 needs to be changed from the flat state to the turned-up state, the emergency operation device 13 is manually operated, the upper electromagnet 111 attracts the upper attracting component 1113, the upper attracting component 1113 drives the upper pusher dog 112 to rotate around the upper locking trigger mechanism rotating shaft 114 through the upper connecting component 1115, so that the other end of the upper pusher dog 112 is separated from the upper first clamping groove 1110, meanwhile, the first switch board 113 also rotates along with the rotation of the upper locking trigger mechanism rotating shaft 114, when the first switch board 113 rotates to be in contact with the first micro switch 116, the first micro switch 116 is triggered to send an unlocking signal to the controller 15, the controller 15 controls the upper electromagnet 111 to stop attracting and simultaneously controls the motor 44 to rotate, the seat board 3 is driven to rotate upwards, and meanwhile, the lock pin 31 rotates downwards and is separated from the upper second clamping groove 1111 of the upper locking fork 117. After the upper electromagnet 111 stops being attracted, the upper pusher dog 112 returns to the flat position of the seat plate 3 under the action of the first torsion spring 115, and the upper locking fork 117 stops after continuing to rotate for a period of time under the action of the second torsion spring 119, so that the upper second clamping groove 1111 faces downwards when the upper locking fork 117 stops, and thus the locking pin 31 can be smoothly clamped into the upper second clamping groove 1111 when rotating upwards again. The lock pin 31 rotates downward under the indirect control of the controller 15 until the cross bar at the free end of the lock pin 31 is clamped into the lower second clamping groove 211 of the lower lock fork 27, the lower lock fork 27 is pushed to rotate until the lower pusher dog 22 is clamped into the lower first clamping groove 4110 of the lower lock fork 417, the lock pin 31 stops rotating and is locked, and the seat plate 3 reaches the turned-up state and is locked. If the upper third clamping groove 1114 is further formed in the upper locking fork 117, when the upper locking fork 117 rotates to a certain position under the action of the second torsion spring 119 and the upper pusher dog 112 rotates to a certain position under the action of the first torsion spring 115, the upper pusher dog 112 can be clamped in the upper third clamping groove 1114 of the upper locking fork 117, so that the upper locking fork 117 can precisely rotate to a preset position, and thus, when the lock pin 31 rotates upwards, the cross bar at the free end of the lock pin 31 can precisely be clamped in the upper second clamping groove 1111 of the upper locking fork 117.

When the seat plate 3 is in the turned-up state, as shown in fig. 5, the cross bar at the free end of the lock pin 31 is engaged in the lower second slot 4111 of the lower lock fork 417, the other end of the lower finger 412 is engaged in the lower first slot 4110 of the lower lock fork 417, and the upper finger 12 is disengaged from the upper first slot 1110 of the upper lock fork 117, and the upper second slot 111 of the upper lock fork 17 faces downward. If the locking fork 117 is further provided with an upper third clamping groove 1114, then the upper finger 12 now engages in the upper third clamping groove 1114 of the locking fork 17. When the seat board 3 needs to be changed from the turning-up state to the flat-down state, the emergency operation device 13 on the seat is operated, the lower electromagnet 411 attracts the lower attracting component (not shown), the lower attracting component (not shown) drives the lower pusher dog 412 to rotate around the lower locking trigger mechanism rotating shaft 414 through the lower connecting component (not shown), so that the other end of the lower pusher dog 412 is separated from the lower first clamping groove 4110, meanwhile, the third switch plate 413 also rotates along with the rotation of the lower locking trigger mechanism rotating shaft 414, when the third switch plate 413 rotates to be in contact with the third micro switch 416, the third micro switch 416 is triggered to send an unlocking signal to the controller 15, the controller 15 controls the lower electromagnet 411 to stop attracting and simultaneously controls the motor 44 to rotate, the seat board 3 is driven to rotate downwards, and meanwhile, the lock pin 31 rotates upwards and is separated from the lower second clamping groove 4111 of the lower lock fork 417. After the lower electromagnet 411 stops being attracted, the lower pawl 412 returns to the position when the seat board 3 turns up under the action of the third torsion spring 415, and the lower lock fork 417 stops after continuing to rotate for a period of time under the action of the fourth torsion spring 419, so that the lower second clamping groove 4111 faces upwards when the lower lock fork 417 stops, and thus the lock pin 31 can be smoothly clamped into the lower second clamping groove 4111 when rotating downwards again. The lock pin 31 rotates upward under indirect control of the controller 15 until the cross bar at the free end of the lock pin 31 is caught in the upper second catching groove 1111 of the upper locking fork 117, pushing the upper locking fork 117 to rotate until the upper pusher dog 112 is caught in the upper first catching groove 1110 of the upper locking fork 117, the lock pin 31 stops rotating and locks, and the seat plate 3 reaches a flat state and locks. If the lower lock fork 417 is further provided with a lower third clamping groove (not shown), when the lower lock fork 417 rotates to a certain position under the action of the fourth torsion spring 419 and the lower pawl 412 rotates to a certain position under the action of the third torsion spring 415, the lower pawl 412 can be clamped in the lower third clamping groove (not shown) of the lower lock fork 417, so that the lower lock fork 417 can precisely rotate to a preset position, and thus when the lock pin 31 rotates downward, the cross bar at the free end of the lock pin 31 can precisely clamp into the lower second clamping groove 4111 of the lower lock fork 417.

Furthermore, the emergency operation device 13 includes a pull-up wire coil and a pull-down wire coil. The wire is wound on the pull-up wire coil, one end of the wire is exposed out of the seat, the other end of the wire is connected with the upper pulling claw 112, the upper pulling claw 112 can be rotated by manually pulling the wire, and accordingly the other end of the upper pulling claw 112 is separated from the upper first clamping groove 1110 of the upper locking fork 117, the seat board 3 can be unlocked, and the seat board 3 can be manually rotated. The wire is wound on the pull-down wire coil, one end of the wire is exposed outside the seat, the other end of the wire is connected with the lower pulling claw 412, the lower pulling claw 412 can be rotated by manually pulling the wire, and therefore the other end of the lower pulling claw 412 is separated from the lower first clamping groove 4110 of the lower locking fork 417, the seat board 3 can be unlocked, and the seat board 3 can be manually rotated.

2. Isolation locking system 1243

As shown in fig. 9 and 10, the isolation lock system 1243 includes an isolation lock system housing 43, an upper isolation lock, a lower isolation lock, and a rotating mechanism. The upper and lower isolation locks are identical in construction and both are secured to the isolation locking system housing 43. The rotation mechanism is a seat support bar 32 having one end fixed to the end of the seat plate 3 near the seatback 1, as shown in fig. 3, and the seat support bar 32 is coplanar with the seat plate 3. After the controller 15 controls the motor 44 to rotate, the motor 44 drives the seat board 3 to rotate, and the seat support rod 32 rotates along with the seat board 3.

The upper isolation locking device includes an upper isolation lock body 121, an upper moving mechanism, an upper blocking mechanism capable of rotating, an upper isolation driving mechanism capable of driving the upper moving mechanism to move and transmitting a signal to the controller 15, and an upper isolation reset mechanism capable of resetting the upper blocking mechanism, as shown in fig. 9 to 12. The upper moving mechanism includes an upper pull rod 127. The upper blocking mechanism comprises an upper block 128, an upper block rotating shaft 129 rotationally fixed on the upper isolation lock body 121 is arranged in the center of the upper block 128, an upper isolation reset mechanism is sleeved on the upper block rotating shaft 129, and the upper isolation reset mechanism can adopt an upper block torsion spring 1210. The upper isolation driving mechanism includes a pull-up wire coil 122, a second switch plate 125, a second micro switch 1211 fixed to the upper isolation lock body 121, and two upper adjusters 124. The center of the pull-up wire coil 122 is provided with a pull-up wire coil rotating shaft 123 rotatably fixed on the upper isolation lock body 121, one end of the second switch plate 125 is fixed on the pull-up wire coil rotating shaft 123, the other end of the second switch plate 125 is provided with a first slope 1251, and when the upper stop block 128 is positioned at the initial position of blocking the upper pull rod 127, the bottom of the first slope 1251 presses the second action reed 1212 of the second micro switch 1211. One end of the upper pull rod 127 is fixed with the upper pull wire coil rotating shaft 123 through an upper connecting rod 126. The upper pulling wire coil 123 is wound with a plurality of coils, and both ends of the coils are respectively penetrated out by two upper adjusters 124 fixed on the upper isolation lock body 121.

Similarly, the lower isolation locking device includes a lower isolation lock 421, a lower movement mechanism, a lower blocking mechanism capable of rotating, a lower isolation driving mechanism capable of driving the lower movement mechanism to move and send a signal to the controller, and a lower isolation reset mechanism capable of resetting the lower blocking mechanism, as shown in fig. 9 and 10. The lower moving mechanism includes a lower pull rod 427. The lower blocking mechanism comprises a lower stop block 428, a lower stop block rotating shaft 429 rotationally fixed on the lower isolation lock body 421 is arranged in the center of the lower stop block 428, a lower isolation reset mechanism is sleeved on the lower stop block rotating shaft 429, and the lower isolation reset mechanism can adopt a lower stop block torsion spring 4210. The lower isolation driving mechanism includes a pull-down wire coil (not shown), a fourth switch board (not shown), a fourth micro switch (not shown) fixed on the lower isolation lock 421, and two lower regulators (not shown). The center of the pull-down wire coil (not shown) is provided with a pull-down wire coil rotating shaft (not shown) rotatably fixed on the lower isolation lock body 421, one end of a fourth switch plate (not shown) is fixed on the pull-down wire coil rotating shaft (not shown), the other end of the fourth switch plate (not shown) is provided with a second slope (not shown), and when the lower stop 428 is positioned at the initial position for blocking the pull-down rod 427, the bottom of the second slope (not shown) presses a fourth action reed (not shown) of the fourth micro switch (not shown). One end of the lower link 427 is fixed to a rotating shaft (not shown) of the lower wire coil by a lower link (not shown). The pull-down wire coil (not shown) is wound with a plurality of loops of wire, and two ends of the wire are respectively penetrated out by two lower adjusters (not shown) fixed on the lower isolation lock body 421.

The operation of the isolation lock system 1243 is described as follows:

when the seat support bar 32 is positioned between the upper and lower isolation locking devices, the upper stopper 128 is positioned at the initial position, that is, the upper stopper 128 blocks the free end of the upper stopper 127, the bottom of the first slope 1251 of the second switch plate 125 presses the second action reed 1212 of the second micro switch 1211, and at this time, the upper stopper 127 cannot move in the direction of the upper stopper 128; the lower stopper 428 is located at an initial position, that is, the lower stopper 428 blocks the free end of the lower stopper 427, and the bottom of the second slope (not shown) of the fourth switch board (not shown) presses the fourth actuating reed (not shown) of the fourth micro switch (not shown), at which time the lower stopper 427 cannot move in the direction of the lower stopper 428.

When the upper control module sends out a command for leveling the seat plate 3, the controller receives the command and controls the seat plate 3 to rotate downwards, so that the seat support rod 32 is driven to rotate upwards. The upward rotation of the seat support bar 32 pushes the upper stopper 128 upward about the upper stopper rotation shaft 129 until both the seat support bar 32 and the upper stopper 128 stop rotating after the seat support bar 32 rotates to a horizontal state. At this time, the seat plate 3 is in a horizontal state, and the upper stopper 128 has not stopped the upper tie rod 127, as shown in fig. 9. If the seat is in fault and needs to be electrically and mechanically isolated for convenient maintenance, the isolating switch 14 can be manually operated to pull the upper regulator 124, so that the upper pull wire coil 122 rotates in one direction to drive the upper pull rod 127 to move towards the direction close to the upper stop block 128, the first slope 1251 at the other end of the second switch plate 125 gradually loosens the second action reed 1212 of the second micro switch 1211, and when the upper pull rod 127 moves towards the direction close to the upper stop block 128 to the maximum extent, the seat support rod 32 is limited to shake downwards, so that the mechanical isolation of the seat plate 3 is realized, and at the moment, the first slope 1251 at the other end of the second switch plate 125 is completely separated from the second action reed 1212 of the second micro switch 1211, the second micro switch 1211 sends an isolation in-place signal to the controller 15, and the controller 15 automatically cuts off communication with the upper control module, so that the electrical isolation between the seat and the upper control module is realized. When the maintenance is completed, the isolation switch 14 is manually operated to restore the communication between the controller 15 and the upper control module, the other upper regulator 124 is pulled to rotate the pull-up wire coil 122 in the opposite direction, the upper pull rod 127 is driven to move away from the upper stop 128, the first slope 1251 at the other end of the second switch plate 125 gradually presses the second action reed 1212 of the second micro switch 1211, when the upper pull rod 127 moves away from the upper stop 128 to the maximum extent, the limitation on the seat support rod 32 is released, so that the mechanical isolation of the seat plate 3 is released, and at the moment, the first slope 1251 at the other end of the second switch plate 125 presses the second action reed 1212 of the second micro switch 1211, the second micro switch 1211 sends a restoration signal to the controller 15, and the controller 15 restores the communication with the upper control module, so that the electrical isolation between the seat and the upper control module is released.

When the upper control module sends out an instruction for turning up the seat board 3, the controller 15 receives the instruction and controls the seat board 3 to rotate upwards, so as to drive the seat support rod 32 to rotate downwards. The downward rotation of the seat support bar 32 urges the lower stop 428 to rotate downward about the lower stop pivot 429 until both the seat support bar 32 and the lower stop 428 stop rotating after the seat support bar 32 rotates to the flipped up position. At this time, the seat plate 3 is in the flipped up state, and the lower stopper 428 has not stopped the lower link 427, as shown in fig. 10. If the seat is in fault and needs to be electrically and mechanically isolated for convenient maintenance, the isolating switch 14 can be manually operated to pull a lower regulator (not shown) to enable the pull-down wire coil (not shown) to rotate in one direction, drive the lower pull rod 427 to move towards the direction close to the lower stop block 428, the second slope (not shown) at the other end of the fourth switch plate (not shown) gradually loosens the fourth action reed (not shown) of the fourth micro switch (not shown), and when the lower pull rod 427 moves towards the direction close to the lower stop block 428 to the maximum extent, the seat supporting rod 32 is limited to swing upwards, so that the mechanical isolation of the seat plate 3 is realized, and at the moment, the second slope (not shown) at the other end of the fourth switch plate (not shown) is completely separated from the fourth action reed (not shown) of the fourth micro switch (not shown), the fourth micro switch (not shown) sends an isolating signal to the controller 15, and the controller 15 automatically cuts off communication with the upper control module, so that the electrical isolation between the seat and the upper control module is realized. When the maintenance is completed, the communication between the controller 15 and the upper control module needs to be restored, the isolating switch 14 can be manually operated, the other lower regulator (not shown) is pulled to rotate the pull-down wire coil (not shown) in the opposite direction, the pull-down rod 427 is driven to move away from the lower stop block 428, the second slope (not shown) at the other end of the fourth switch board (not shown) gradually presses the fourth action reed (not shown) of the fourth micro switch (not shown), when the pull-down rod 427 moves to the maximum extent in the direction away from the lower stop block 428, the limitation on the seat support rod 32 is released, so that the mechanical isolation of the seat plate 3 is released, and at the moment, the second slope (not shown) at the other end of the fourth switch board (not shown) presses the fourth action reed (not shown) of the fourth micro switch (not shown) to send a restoring signal to the controller 15, and the controller 15 resumes the communication with the upper control module, so that the electrical isolation between the seat and the upper control module is released.

The motor 44 may rotate the seat plate 3 in various ways, and the motor shaft 441 may be directly connected to the seat plate shaft 21, or the motor shaft 441 may be further connected to the seat plate shaft 21 through a two-stage worm gear assembly, as shown in fig. 14. The following focuses on the structure of the two-stage worm gear assembly and its periphery.

As shown in fig. 14, the automatic folding seat of this embodiment is further provided with a secondary worm gear assembly and a clutch mechanism. The second-stage worm and gear assembly comprises a first-stage worm 71, a first-stage worm wheel 72, a second-stage worm 73 and a second-stage worm wheel 74, the end part of the first-stage worm 71 is connected with a rotating shaft of the motor 44, the second-stage worm wheel 74 is sleeved on a second-stage worm wheel shaft 75, one end of the second-stage worm wheel shaft 75 is provided with an output shaft 76, and one end of the output shaft 76 is connected with the seat board rotating shaft 21; the clutch mechanism can rotate the output shaft 76 and the second-stage worm wheel shaft 75 at the same time, and can prevent the output shaft 76 from rotating.

The clutch mechanism comprises a telescopic part and a moving part, the moving part can move in the second-stage worm wheel shaft and the output shaft, and one end of the telescopic part is fixed in the output shaft. The telescopic member includes a compression spring 79 having one end fixed inside the output shaft, the moving member includes a push rod 77 and a spline shaft 78, and one end of the spline shaft 78 is provided with a cavity 781 for accommodating the compression spring 79. The spline shaft 78 has splines on its outer surface and spline grooves on the inner surface of the second stage worm wheel shaft and the inner surface of the output shaft. Push rod 77 can be pushed to move rightward, which drives spline shaft 78 to move rightward. When the compression spring 79 is in a compressed state or the length of the compression spring 79 is smaller than the preset length, part of the spline shaft 78 enters the output shaft 76, and part of the spline remains in the second-stage worm wheel shaft 75, at this time, the spline in the second-stage worm wheel shaft 75 is matched with the second-stage worm wheel shaft 75, the spline in the output shaft 76 is matched with the output shaft 76, the second-stage worm wheel shaft 75 and the output shaft 76 are in a 'combined' state, as shown in fig. 14, at this time, if the motor 44 rotates, the second-stage worm wheel shaft 75 and the output shaft 76 rotate simultaneously, namely the seat plate 3 rotates. When the compression spring 79 is in a natural extension state or the length of the compression spring 79 is not less than a preset length, the splined portion of the spline shaft 78 is separated from the output shaft 76, all the splines are left in the second-stage worm wheel shaft 75, the second-stage worm wheel shaft 75 and the output shaft 76 are in a 'separated' state, and no matter whether the second-stage worm wheel shaft 75 rotates or not, the output shaft 76 is driven to rotate, namely, the seat plate 3 is in a locking state.

In order to facilitate operation, a rotating mechanism can be further arranged, the moving part can be pushed in the process that the rotating mechanism rotates in one direction, and the moving part can be released in the process that the rotating mechanism rotates in the opposite direction. As shown in fig. 14, the rotation mechanism includes a cam 710 and a handle 711 provided on a cam shaft 7103, and the rotation handle 711 can rotate the cam 710. In order to better control the rotation stroke of the cam 710 and improve the accuracy and stability of the clutch, the edge of the cam 710 is further provided with a first limiting protrusion 7101 for limiting the "on" state and a second limiting protrusion 7102 for limiting the "off" state.

The following describes the clutch process in detail:

(1) The process from "off" to "on":

when the handle 711 is rotated clockwise, the cam 710 rotates clockwise, the push rod 77 is pushed to move rightwards, the spline shaft 78 is driven to move rightwards, after the side wall of the inner cavity 781 of the spline shaft 78 contacts the pressure spring 79, the pressure spring 79 is gradually compressed along with the continued movement of the push rod 77, when the cam 710 rotates until the first limiting protrusion 7101 abuts against the push rod 77, the push rod 77 is blocked by the first limiting protrusion 7101 to stop rotating, at the moment, part of the spline shaft 78 enters the output shaft 76, still part of the spline remains in the second-stage worm wheel shaft 75, at the moment, the spline in the second-stage worm wheel shaft 75 is matched with the second-stage worm wheel shaft 75, the spline in the output shaft 76 is matched with the output shaft 76, and the second-stage worm wheel shaft 75 is in a 'combined' state with the output shaft 76, as shown in fig. 14.

(2) The process from "on" to "off":

the handle 711 is rotated counterclockwise, so that the cam 710 rotates counterclockwise, the push rod 77 is released, the compression spring 79 rebounds, the spline shaft 78 and the push rod 77 move leftward under the action of the elastic force, when the cam 710 rotates until the second limit protrusion 7102 abuts against the push rod 77, the push rod 77 is blocked by the second limit protrusion 7102 to stop rotating, at this time, all the splines of the spline shaft 78 are left in the second-stage worm wheel shaft 75, and the second-stage worm wheel shaft 75 and the output shaft 76 are in a "separated" state.

It will be seen that if it is desired to lock the seat pan 3 in a position, the motor 44 can be controlled to stop rotating when the seat pan 3 is rotated to that position, and then the second stage worm gear shaft 75 is brought "out of the way" with the output shaft 76 by rotating the handle 711 so that the seat pan 3 is locked in that position. Therefore, the locking of the seat board 3 at any position in the rotation process can be realized according to the specific embodiment, so that the safety of the seat is improved, and particularly, when the seat is powered off or has an electrical failure, the seat board 3 can be locked, so that the safety is improved, and the seat board is convenient to maintain.

Claims

1. An automatic folding seat, includes rotatable bedplate, its characterized in that: the locking system comprises an upper locking device and a lower locking device; when the seat board rotates to a flat state, the upper locking device automatically locks the seat board; when the seat board rotates to a turned-up state, the lower locking device automatically locks the seat board; the motor can drive the seat board to rotate, and the motor is controlled by the controller; the controller detects the current of the motor, and in the process of rotating the motor, the extrusion preventing method is executed according to the following steps:

2. The automatic folding seat according to claim 1, wherein: the locking device comprises a locking mechanism, a locking pin, a locking mechanism and a controller, wherein the locking pin is fixed with a seat plate, the locking mechanism is identical to the lower locking device in structure, the locking mechanism comprises a trigger mechanism capable of rotating, a driving mechanism used for driving the trigger mechanism to rotate, a switch and a locking mechanism capable of rotating, the trigger mechanism comprises a reset part used for resetting the trigger mechanism, the trigger mechanism can trigger the switch to send an unlocking signal to the controller in the rotating process, the locking mechanism is movably connected with the trigger mechanism, when the locking mechanism and the trigger mechanism relatively rotate, the locking mechanism and the trigger mechanism can be separated, and the locking pin can push the locking mechanism to rotate and can be fixed with the locking mechanism.

3. The automatic folding seat according to claim 2, wherein: the trigger mechanism further comprises a pusher dog, a switch plate and a rotating shaft, wherein the pusher dog and the switch plate are fixed on the rotating shaft, the reset part is sleeved on the rotating shaft, the switch plate can trigger the switch to send an unlocking signal to the controller in the rotating process, and the locking mechanism is provided with a first clamping groove for clamping the pusher dog.

4. The automatic folding seat according to claim 2, wherein: the locking mechanism comprises a locking fork and a rotating shaft, and a first clamping groove for clamping the triggering mechanism and a second clamping groove for clamping the locking pin are formed in the locking fork.

5. The automatic folding seat according to claim 4, wherein: and a third clamping groove for clamping the trigger mechanism is further formed in the lock fork, and when the trigger mechanism rotates to a position capable of triggering the switch, the trigger mechanism is clamped into the third clamping groove.

6. The automatic folding seat according to claim 2, wherein: the locking mechanism comprises a rotating shaft, a rotating component is sleeved on the rotating shaft, and the locking mechanism can continue to rotate for a certain distance after the lock pin leaves the rotating component.

7. The automatic folding seat according to claim 2, wherein: the driving mechanism comprises an electromagnet and an attracting component which can be attracted by the electromagnet, and the attracting component is connected with the triggering mechanism.

8. The automatic folding seat according to claim 1, wherein: the device also comprises a damper, wherein one telescopic end of the damper is connected with the rotating shaft of the seat board, and the other end of the damper is rotationally fixed.