CN205617983U - Automatic move a system - Google Patents

Abstract

The utility model discloses an automatic move a system, including the crossbeam, locating actuating mechanism and stop gear on the crossbeam, actuating mechanism connecting sleeve subassembly through door carrying frame connection door leaf, is equipped with the direction locking piece on the crossbeam, actuating mechanism includes by motor drive's lead screw and nut component, nut component includes that gear frame, cover locate nut on the lead screw, fix the follow -up part on the nut, the nut is installed in the gear frame, transmission frame connected sleeve subassembly, lead screw reciprocating axially is followed to lead screw drive nut subassembly, the lead screw forward rotates the in -process, when follow -up part touches the direction locking piece, stops to stop gear and by this stop gear in the downstream of leading of direction locking piece upper surface, and follow -up part rotates the side that gets into the locking piece that leads and the space between the stop gear along with the lead screw and the quilt is locked, during the lead screw antiport, follow -up part relieves the locking along with lead screw antiport to the restriction that breaks away from the locking piece that leads, then along lead screw axial motion.

Description

Automatic moving door system

Technical field

The utility model relates to automatic control system field, is specifically applied to a kind of automatic moving door system of automatically-controlled door.

Background technology

Existing automatic moving door system, generally electric motor driven screw, drive the nut assembly being arranged on screw rod to carry out past Multiple motion, and then drive the door leaf being connected with nut assembly.Typically, sliding door system more application in track traffic, The mass transportation facilities door fields such as big bus, it also has locking and unlocking function simultaneously.It is commonly used to the shifting in above-mentioned field Door system, is locked to nut assembly by electromagnetic lock, and then realizes the function locked a door.The sliding door system of this form, Electromagnetic lock must be energized the stability that guarantee is locked a door at any time, if after electromagnetic lock power-off, then can there is door and automatically open up Risk, and prior art enters line-locked structure with mechanical lock opposite house, mostly there is baroque problem, as master The system to be made up of frame for movement, structure complexity can bring poor reliability, from the problem such as great, wayward, especially When being applied to public transport field, the personal safety of passenger can be threatened.

Utility model content

Utility model purpose: a kind of automatic moving door system that the utility model provides, to solve in prior art, answers electricity consumption The problem that power-off back door existing for the door system of magnetic padlock can automatically open up, and existing for the door system of application mechanical lock Structure is complicated, from the problem such as great, wayward.

Technical scheme: for solving above-mentioned technical problem, of the present utility model kind of automatic moving door system, including crossbeam, be located at Drive mechanism on crossbeam and position-limit mechanism, drive mechanism branch sleeve assembly, connect door leaf, described horizontal stroke by taking door frame Beam is provided with guiding lock dog；Described drive mechanism includes by motor-driven screw mandrel and nut assembly；Described nut assembly bag Include gear frame, the nut being sheathed on screw mandrel, the follow-up unit being fixed on nut；Nut is arranged in gear frame, passes Moving frame branch sleeve assembly；Screw mandrel drives nut assembly along screw mandrel axially reciprocating；During screw mandrel rotates forward, when When follow-up unit touches guiding lock dog, move downwardly to position-limit mechanism and by this position restrainer guiding leading of lock dog upper surface Structure stops, follow-up unit is rotated into the space between the side of guiding lock dog and position-limit mechanism with screw mandrel and is locked；Silk When bar rotates backward, follow-up unit rotates backward with screw mandrel and unlocks to the restriction departing from guiding lock dog, then along silk Bar axially-movable.

Further, described gear frame has the mechanism limiting nut with screw mandrel rotational angle range.

Further, described gear frame has the installation portion being connected with sleeve assembly, and installation portion upwardly extends formation by four The nut installation portion that column is constituted, nut is arranged in the space that four root posts are constituted, wherein towards the two of crossbeam side Root post top is provided with the spacer pin limiting nut with screw mandrel rotational angle range.

Further, the external diameter of described nut is more than the distance between two heel posts, and therefore nut is limited in two heel posts Between space in, nut along screw mandrel axially-movable when, by thrust is applied to the column of not homonymy, drive gear frame Move with nut.

Further, described nut is made up of inner ring and outer ring, and inner ring coordinates with wire rod thread, outer ring sleeve on inner ring simultaneously Being cooperated by anti-slop serrations, outer ring is outward extended with the mounting seat of follow-up unit towards crossbeam side.

Further, described mounting seat has a screw, and follow-up unit has a screw rod, and screw rod is screwed in screw, makes servo-actuated Parts and the fixing connection of nut.

Further, described follow-up unit is roller, uses roller and guides lock dog collocation, by guiding lock dog surface When can reduce the running resistance of nut assembly to greatest extent, promote the use stationarity of system.

Further, the outer ring both sides of described nut lay respectively between corresponding adjacent upright posts, and screw mandrel passes through nut outer ring Gear frame is driven to move axially along screw mandrel.

Further, described nut assembly also comprises the elastomeric element applying twisting resistance to nut.

Further, described elastomeric element is torsion spring, and one end rides against on gear frame, and the other end rides against on nut.

Further, described nut outer ring is outward extended with block, and one end rides against on this block.

Further, described guiding lock dog has the smooth upper surface that a guiding follow-up unit moves to position-limit mechanism.

Further, described guiding lock dog has one towards the side of position-limit mechanism, is formed between this side and position-limit mechanism The space of follow-up unit can be fallen into.

Further, described side is for limiting the inclined-plane that follow-up unit ejects.

Further, the angle between described side and vertical plane is 0-10 °, in this angular range, has both guided lock dog Can apply active force to follow-up unit, follow-up unit will not be caused because angle is excessive again by locked problem, this angle is excellent Elect 3 ° as.

Further, be additionally provided with the slide rail moving for follow-up unit, this slide rail with guide lock dog connect and with guide pad Upper surface seamlessly transits.Slide rail is set, makes follow-up unit move under the restriction of slide rail, nut group can be increased further The stationarity of part motion.

Further, described position-limit mechanism includes a limiting plate being arranged on crossbeam, and this limiting plate has one side guide To the side of lock dog, this side is configured to fall into the space of follow-up unit with the side guiding lock dog.

Further, described limiting plate is rotatably installed on crossbeam by bearing pin, and this limiting plate is towards guiding lock dog one Side has the riser of bending；It is provided with back-moving spring between limiting plate and bearing pin.

Further, described limiting plate can trigger switch in spinning movement.

Further, described limiting plate is provided with waist hole, and described crossbeam is provided with spacer pin, and spacer pin stretches in waist hole Limit limiting plate rotational steps.

Further, described position-limit mechanism includes a man-operated mechanism, and this man-operated mechanism includes that one is arranged on crossbeam Fixed support and a travel(l)ing rest being arranged on bearing pin, be provided with back-moving spring between two supports, and travel(l)ing rest leads to Cross manual stay cord and drive around bearing pin rotation, can be by follow-up unit between guiding lock dog and position-limit mechanism in rotation process Space in transfer to.

Further, described travel(l)ing rest and limiting plate are arranged on same bearing pin.

Further, described crossbeam two ends are provided with hanger, parallel between hanger are provided with long guide pillar, and sleeve assembly is located at long leading On post, and can move back and forth on long guide pillar.

Further, it is provided with two root length guide pillars between described hanger, each long guide pillar is respectively equipped with a sleeve assembly, One of them sleeve assembly connects drive mechanism, and connects another sleeve assembly by link gear.

Further, described link gear includes the roller being respectively arranged on each hanger and the tractive unit being arranged on roller Part, traction element forms closed loop between the rollers 27 and 28, and the both sides of this closed loop traction element are respectively with each sleeve assembly even Connect.

Beneficial effect: a kind of automatic moving door system of the present utility model, nut assembly and guiding lock dog, the group of position-limit mechanism Close, solve existing electromagnetic lock automatic moving door system lost efficacy when door automatically open up, the problem bringing security risk, also than The automatic moving door system of existing machinery lock construction is more simple and reliable, and nut assembly relative in prior art with chute phase The form coordinating, structure is more succinct, runs also more steady, and the number of components owing to constituting its entirety is few, is thus susceptible to Process and conduct oneself with dignity little, it is not necessary to excessive installing space.

Brief description

Fig. 1 is the utility model overall structure schematic diagram；

Fig. 2 is the utility model the second embodiment structural representation；

Fig. 3 is for guiding the first embodiment of lock dog；

Fig. 4 is for guiding the second embodiment of lock dog；

Fig. 5 is nut assembly structural representation；

Fig. 6 is the combining structure schematic diagram of nut assembly and gear frame；

Fig. 7 is gear frame structural representation；

Fig. 8 is nut structure schematic diagram；

Fig. 9 is for guiding lock dog and position-limit mechanism, the mated condition schematic diagram of follow-up unit；

Figure 10 is man-operated mechanism structural representation；

Figure 11 is the structural representation comprising link gear on crossbeam.

Detailed description of the invention

Below in conjunction with the accompanying drawings the utility model is further described.

A kind of automatic moving door system as shown in Figure 1, including crossbeam 11 and be arranged on crossbeam 11 past for driving gate The drive mechanism of multiple movement, drive mechanism branch sleeve assembly 6, sleeve assembly 6 connects door 48 by taking door frame；At horizontal stroke Beam 11 two ends are respectively mounted hanger 49, and parallel equipped with two root length guide pillars 50 between hanger 49, sleeve assembly 6 is sleeved on On long guide pillar 50, and can move back and forth on long guide pillar 50.

As shown in Figures 3 to 10, drive mechanism include the motor being fixed on crossbeam 11 the 1st, guide lock dog 51 and limit Position mechanism 4, motor 1 is connected with controller；The axle connection wire rod 2 of motor 1, complete on screw mandrel 2 is configured with nut Assembly 3；Nut assembly 3 include nut 31 and with nut 31 rigidly connected follow-up unit 7, nut 31 and screw mandrel 2 composition screws are secondary, be provided with gear frame 9, can relative transport between gear frame 9 with nut 31 outside nut 31 Dynamic；Be provided with torsion spring 10 between gear frame 9 and nut 31, torsion spring 10 with gear frame 9 for support to follow-up unit 7 Apply pressure, gear frame 9 branch sleeve assembly 6, during screw mandrel 2 rotates forward, drive nut 31 and follow-up unit 7 move simultaneously, when move to follow-up unit 7 with guide lock dog 51 contact after, follow-up unit 7 guiding lock dog 51 on Leading of surface moves downwardly to position-limit mechanism 4 and is stopped by this position-limit mechanism 4, and follow-up unit 7 is rotated into screw mandrel 2 Guide the space between the side of lock dog 51 and position-limit mechanism 4 and be locked；When screw mandrel 2 rotates backward, follow-up unit 7 Rotate backward with screw mandrel 2 and unlock to the restriction departing from guiding lock dog 51, then along screw mandrel 2 axially-movable.Lead Have one towards the side of position-limit mechanism 4 to lock dog 51, formed between this side and position-limit mechanism 4 can fall into servo-actuated The space of parts 7.Side is for limiting the inclined-plane that follow-up unit 7 ejects, and the angle between side and vertical plane is 0-10 °, in this angular range, guiding lock dog 51 can apply active force to follow-up unit 7, again will not be because of angle mistake Causing follow-up unit 7 by locked problem greatly, this angle is preferably 3 °.And also have in gear frame 9 and limit nut 31 with the mechanism of screw mandrel 2 rotational angle range, and this mechanism is a space, and the follow-up unit 7 on nut 31 is at this sky Moving up and down with nut 31 between, the top and bottom in this space define the slewing area of follow-up unit 7, and then limit Determine slewing area when nut 31 moves with screw mandrel 2.

As it is shown on figure 3, as the first embodiment, guide lock dog 51 and there is a guiding follow-up unit 7 to position restrainer The smooth upper surface that structure 4 moves, in follow-up unit 7 motion process, when it does not connects with guiding lock dog 51 upper surface It when touching, is in free state, be i.e. positioned at the lower end in the space that above-mentioned restriction follow-up unit 7 rotates, be arranged on nut 31 And the torsion spring 10 between gear frame 9 may be configured as being in the compressive state of relaxation state or less, does not executes to nut 31 Add twisting resistance, or apply less twisting resistance to nut 31, can make nut 31 in driving follow-up unit 7 to run, More steady.When follow-up unit 7 is by guiding lock dog 51 upper surface, torsion spring 10 is compressed, and applies to nut 31 Torsion, thereby it is ensured that follow-up unit 7 can be rotated by screw mandrel 2 and drive nut after touching limiting plate 13 31 and the twisting resistance that applies of torsion spring 10, limiting plate 13 and the space guiding between lock dog 51 can be smoothly entered.

As shown in Figure 4, as the second embodiment, crossbeam 11 is also installed with and moves for follow-up unit 7 Slide rail 5, this slide rail 5 with guide lock dog 51 connect and with guide lock dog 51 upper surface seamlessly transit, specifically, Guide lock dog 51 and be arranged on slide rail 5 one end near limiting component, and there is the upper surface of level, upper with slide rail 5 Surface connects becomes an integral level surface.After arranging slide rail 5, follow-up unit 7 is i.e. with slide rail 5 upper surface simultaneously Can move back and forth on this upper surface, under this setup, follow-up unit 7 is positioned at above-mentioned restriction follow-up unit 7 turns Between the top and bottom in dynamic space, not with upper end or lower end in contact, the now torsion between nut 31 and gear frame 9 Spring 10 is in compressive state, and after follow-up unit 7 moves to contact with limiting plate 13, screw mandrel 2 rotates and drives nut 31 The twisting resistance that nut 31 is applied by the power rotating and torsion spring 10, it is ensured that follow-up unit 7 can enter limiting plate smoothly Space between 13 and guiding lock dog 51.Slide rail 5 is set, makes follow-up unit 7 move under the restriction of slide rail 5, energy Enough stationarities increasing nut assembly 3 motion further.

As shown in Fig. 5 to Fig. 8, gear frame 9 has the installation portion 91 being connected with sleeve assembly 6, and installation portion 91 is upwards Extending and forming the nut installation portion being made up of four root posts 92, nut 31 is arranged in the space that four root posts 92 are constituted, Two root post 92 tops towards crossbeam 11 side are provided with restriction nut 31 with screw mandrel 2 rotational angle range wherein Spacer pin 12, therefore, between the bottom of two root posts 92 of spacer pin 12 and crossbeam 11 side and spacer pin 12 formed Rotation space when nut 31 rotates with screw mandrel 2, spacer pin 12 is above-mentioned upper end, and two root posts 92 it Between space bottom then be lower end.The external diameter of nut 31 is more than the distance between two heel posts 92, therefore nut 31 quilt Be limited in the space between two heel posts 92, nut 31 along screw mandrel 2 axially-movable when, by not homonymy is stood Post 92 applies thrust, drives gear frame 9 to move with nut 31, and nut 31 is made up of inner ring and outer ring, inner ring With screw mandrel 2 threaded engagement, outer ring sleeve is on inner ring and is cooperated by anti-slop serrations, outer ring towards crossbeam 11 side to Being extended with outward the mounting seat of follow-up unit 7, mounting seat has a screw, and follow-up unit 7 has a screw rod, and screw rod is screwed in spiral shell In hole, make follow-up unit 7 and the fixing connection of nut 31.Follow-up unit 7 can use roller, it is possible to is other types The little parts of smooth surface running resistance, such as ganoid sliding shoe etc..Roller is used to arrange in pairs or groups with guiding lock dog 51, Can reduce the running resistance of nut assembly 3 when by guiding lock dog 51 surface to greatest extent, the use promoting system is put down Stability.The outer ring both sides of nut 31 lay respectively between corresponding adjacent upright posts 92, and screw mandrel 2 passes through nut 31 outer ring Gear frame 9 is driven to move axially along screw mandrel 2.Nut assembly 3 also comprises apply twisting resistance torsion spring 10 to nut 31, One end rides against on gear frame 9, and the other end rides against on nut 31, and torsion spring uses internal diameter to be more than screw mandrel 2 diameter Model, be enclosed within screw mandrel 2 outside, nut 31 outer ring is outward extended with block 32, and one end rides against this block On 32.

As it is shown in figure 9, position-limit mechanism 4 includes a limiting plate being arranged on crossbeam 11 13, this limiting plate 13 has Towards the side guiding lock dog 51, this side is configured to fall into the space of follow-up unit 7 with the side guiding lock dog 51, Limiting plate 13 is rotatably installed on crossbeam 11 by bearing pin 14, and this limiting plate 13 is towards guiding lock dog 51 side Having the riser 26 of bending, the angle of this riser 26 manufactures when applying according to reality, specifically, at follow-up unit 7 not When contacting with riser 26, the upper semisection of this bending riser 26 is vertical, and lower semisection bends to the direction guiding lock dog 51, And after follow-up unit 7 contacts with riser 26, driving limiting plate 13 to rotate, after rotating stopping, lower semisection becomes vertical Direction, upper semisection is to the direction bending guiding lock dog 51, and the bending degree of riser 26, according to the angle of rotation of limiting plate 13 Spend and set, if the rotational angle of limiting plate 13 is α, then folded obtuse angle between the upper semisection of riser 26 and lower semisection Angle be 180 ° of-α；Being additionally provided with back-moving spring between limiting plate 13 and bearing pin 14, back-moving spring can be torsion spring, Torsion spring set is on bearing pin 14, and its one end is fixed on limiting plate 13, and the other end is fixed on crossbeam 11, limiting plate 13 15 can be switched by its edge triggered signal in spinning movement, limiting plate 13 have waist hole 27, on crossbeam 11 Being provided with spacer pin 19, spacer pin 19 limits limiting plate 13 anglec of rotation in stretching into waist hole 27.

As shown in Figure 9, Figure 10, position-limit mechanism 4 also includes a man-operated mechanism, and this man-operated mechanism includes that one is arranged on Fixed support 20 on crossbeam 11 and a travel(l)ing rest being arranged on bearing pin 14 17, be provided with between two supports Back-moving spring, back-moving spring can be torsion spring, and torsion spring set is at bearing pin 14, and its one end is fixed on fixed support 20, separately One end is fixing with travel(l)ing rest 17 to be connected, and travel(l)ing rest 17 can be by follow-up unit 7 from guiding lock dog in rotary course Space between 51 and position-limit mechanism 4 is transferred to, specifically, dialling of a bending can be arranged in travel(l)ing rest 17 bottom Motion block 21, it is dialled below follow-up unit 7 from the space guiding between lock dog 51 and position-limit mechanism 4 by slide block 21 Going out, travel(l)ing rest 17 manually stay cord 8 can drive and rotates around bearing pin 14, and manual stay cord 8 is connected with solving lock-switch, Solving lock-switch can be a manual knob, can pull manual stay cord 8 during rotation.In actual applications, its actual peace It is contained on the position that subway inwall etc. can make people readily access.When turn solution lock-switch drives travel(l)ing rest 17 With bearing pin 14 for center of rotation rotate when, slide block 21 promotes follow-up unit 7 upwards to move.Travel(l)ing rest 17 and limit Position plate 13 is arranged on same bearing pin 14, and the two will not interfere with each other, and integrated level is high, can save peace Dress space.

Foregoing is recited as a sliding door system singly opened, and when arranging two sleeve assemblies 6, as in figure 2 it is shown, Two sleeve assemblies 6 are connected by link gear, and each sleeve assembly 6 connects door 48 by taking door frame, then respectively Constitute a double sliding door system of opening, two doors 48 under the drive of link gear in opposite directions or opposing motion.Such as Figure 11 institute Showing, link gear includes the roller being separately mounted on each hanger 49 and the traction element 63 being wound on roller, traction Parts 63 form closed loop between the rollers 27 and 28, being connected with sleeve assembly 6 of this closed loop traction element 63, another Limit is connected with driven socket assembly 61, and traction element 63 can be Timing Belt, steel wire rope, driving-chain etc., uses and passes During dynamic chain, roller is replaced by gear.

A kind of automatic moving door system of the present utility model, can be divided into following motion process and state:

1st, electronic lock a door: controller sends signal to motor 1, makes motor 1 drive screw mandrel 2 to rotate, and screw mandrel 2 passes through Nut assembly 3 drives follow-up unit 7 to move along screw mandrel 2 is axial to position-limit mechanism 4, when follow-up unit 7 touches guiding During lock dog 51, move downwardly to limiting plate 13 guiding leading of lock dog 51 upper surface and stopped by this limiting plate 13, with Dynamic component 7 is rotated into the space between the side of guiding lock dog 51 and limiting plate 13 with screw mandrel 2 and is locked, at this During, limiting plate 13 rotates, and triggers the signaling switch 15 being arranged on below, and signaling switch 15 sends to controller Putting in place after signal, controller controls motor 1 stall, completes to lock a door.

2nd, electric open-door: controller sends signal to motor 1, makes motor 1 drive screw mandrel 2 to rotate backward, servo-actuated portion Part 7 rotates backward with screw mandrel 2 and unlocks to the restriction departing from guiding lock dog 51, and departs from limiting plate 13, limit Position plate 13 return under the effect of torsion spring, trigger switch 15 sends unlocking signal to controller, then limiting component 7 along screw mandrel 2 axially-movable.When follow-up unit 7 moves to screw mandrel 2 other end, motor 1 stall, complete to open the door.

3rd, manually lock a door: manual actuation sleeve assembly 6, make nut assembly 3 move to position-limit mechanism 4 screw mandrel 2 is axial, Now screw mandrel 2 is passive rotation.When follow-up unit 7 touches guiding lock dog 51, guiding lock dog 51 upper surface Leading and moving downwardly to limiting plate 13 and stopped by this limiting plate 13, follow-up unit 7 is rotated into guiding lock dog with screw mandrel 2 Space between the side of 51 and limiting plate 13 and be locked, in the process, limiting plate 13 rotates, and triggering is arranged on Signaling switch 15 below, after signaling switch 15 sends, to controller, the signal that puts in place, completes to lock a door.

4th, open Door by Hand: during locked door condition, solve lock-switch by rotating so that manual stay cord 8 pulls travel(l)ing rest 17 do rotationally clockwise around bearing pin 14, and the slide block 21 of travel(l)ing rest 17 is stirred from bottom by follow-up unit 7, Making follow-up unit 7 leave latched position, torsion spring drives limiting plate 13 to rotate clockwise around bearing pin 14 simultaneously, and triggers letter Number switch 15, unclamp solution lock-switch after, travel(l)ing rest 17 rotates to original position under the driving of back-moving spring, then Manual actuation sleeve assembly 6, makes nut assembly 3 axial to the direction motion away from position-limit mechanism 4 at screw mandrel 2, it is achieved Open Door by Hand.

The above is only preferred embodiment of the present utility model, it should be pointed out that: for the ordinary skill of the art For personnel, on the premise of without departing from the utility model principle, can also make some improvements and modifications, these improve Also should be regarded as protection domain of the present utility model with retouching.

Claims (25)

1. an automatic moving door system, including crossbeam (11), the drive mechanism being located on crossbeam (11) and position-limit mechanism (4), drive mechanism branch sleeve assembly (6), connect door leaf by taking door frame, it is characterised in that: described crossbeam (11) is provided with guiding lock dog (51)；Described drive mechanism includes screw mandrel (2) and the nut assembly (3) being driven by motor (1)；Described nut assembly (3) includes gear frame (9), the nut being sheathed on screw mandrel (2), the follow-up unit (7) being fixed on nut；Nut is arranged in gear frame (9), and gear frame (9) connects actively sleeve assembly (6)；Screw mandrel (2) drives nut assembly (3) along screw mandrel (2) axially reciprocating；During screw mandrel (2) rotates forward, when follow-up unit (7) touches guiding lock dog (51), moving downwardly to position-limit mechanism (4) guiding leading of lock dog (51) upper surface and being stopped by this position-limit mechanism (4), follow-up unit (7) is rotated into the space between the side of guiding lock dog (51) and position-limit mechanism (4) with screw mandrel (2) and is locked；When screw mandrel (2) rotates backward, follow-up unit (7) rotates backward with screw mandrel (2) and unlocks to the restriction departing from guiding lock dog (51), then along screw mandrel (2) axially-movable.

2. automatic moving door system according to claim 1, it is characterised in that: described gear frame (9) has the mechanism with screw mandrel (2) rotational angle range for the restriction nut (31).

3. automatic moving door system according to claim 2, it is characterized in that: described gear frame (9) has the installation portion (91) being connected with controlled device (6), installation portion (91) upwardly extends and forms the nut installation portion being made up of four root posts (92), nut is arranged in the space that four root posts (92) are constituted, and two root posts (92) top towards crossbeam (11) side is provided with the spacer pin (12) limiting nut (31) with screw mandrel (2) rotational angle range wherein.

4. automatic moving door system according to claim 3, it is characterised in that: the external diameter of described nut (31) is more than the distance between two heel posts (92).

5. automatic moving door system according to claim 3, it is characterized in that: described nut (31) is made up of inner ring and outer ring, inner ring and screw mandrel (2) threaded engagement, outer ring sleeve is on inner ring and is cooperated by anti-slop serrations, and outer ring is outward extended with the mounting seat of follow-up unit (7) towards crossbeam (11) side.

6. automatic moving door system according to claim 5, it is characterized in that: described mounting seat has a screw, follow-up unit (7) has a screw rod, and screw rod is screwed in screw, makes follow-up unit (7) and the fixing connection of nut (31).

7. the automatic moving door system according to any one of claim 1-6, it is characterised in that: described follow-up unit (7) is roller.

8. automatic moving door system according to claim 5, it is characterized in that: the outer ring both sides of described nut (31) lay respectively between corresponding adjacent upright posts (92), screw mandrel (2) drives gear frame (9) to move axially along screw mandrel (2) by nut (31) outer ring.

9. the automatic moving door system according to claim 1 or 3, it is characterised in that: described nut assembly (3) also comprises the elastomeric element (10) applying twisting resistance to nut (31).

10. automatic moving door system according to claim 9, it is characterised in that: described elastomeric element (10) is torsion spring, and one end rides against on gear frame (9), and the other end rides against on nut (31).

11. automatic moving door systems according to claim 10, it is characterised in that: described nut (31) outer ring is outward extended with block (32), and one end rides against on this block (32).

12. automatic moving door systems according to claim 1, it is characterised in that: described guiding lock dog (51) has the smooth upper surface to limiting plate (13) movement for the guiding follow-up unit (7).

The 13. automatic moving door systems according to claim 1 or 12, it is characterized in that: described guiding lock dog (51) has one towards the side of limiting plate (13), and formation between this side and limiting plate (13) can fall into the space of follow-up unit (7).

14. automatic moving door systems according to claim 13, it is characterised in that: described side is for limiting the inclined-plane that follow-up unit (7) ejects.

15. automatic moving door systems according to claim 14, it is characterised in that: the angle between described side and vertical plane is 0-10 °.

The 16. automatic moving door systems according to claim 1 or 12, it is characterized in that: be additionally provided with the slide rail (5) for follow-up unit (7) movement, this slide rail (5) connects with guiding lock dog (51) and seamlessly transits with the upper surface guiding lock dog (51).

17. automatic moving door systems according to claim 1, it is characterized in that: described position-limit mechanism (4) includes a limiting plate (13) being arranged on crossbeam (11), this limiting plate (13) has one side to the side guiding lock dog (51), and this side is configured to fall into the space of follow-up unit (7) with the side guiding lock dog (51).

18. automatic moving door systems according to claim 17, it is characterized in that: described limiting plate (13) is rotatably installed on crossbeam (11) by bearing pin, this limiting plate (13) has the riser (26) of bending towards guiding lock dog (51) side；It is provided with back-moving spring between limiting plate (13) and bearing pin.

19. automatic moving door systems according to claim 18, it is characterised in that: described limiting plate (13) can trigger switch (15) in spinning movement.

20. automatic moving door systems according to claim 18, it is characterized in that: described limiting plate (13) is provided with waist hole (27), being provided with spacer pin (19) on described crossbeam (11), spacer pin (19) limits limiting plate (13) anglec of rotation in stretching into waist hole (27).

The 21. automatic moving door systems according to claim the 1st, 18 or 19, it is characterized in that: described position-limit mechanism (7) includes a man-operated mechanism, this man-operated mechanism includes a fixed support (20) being arranged on crossbeam (11) and a travel(l)ing rest being arranged on bearing pin (17), between two supports, back-moving spring is installed, travel(l)ing rest (17) manually stay cord (8) drives and rotates around bearing pin, can transfer to follow-up unit (7) in rotation process from the space guiding between lock dog (51) and limiting plate (13).

22. automatic moving door systems according to claim 21, it is characterised in that: described travel(l)ing rest (17) and limiting plate (13) are arranged on same bearing pin (14).

23. automatic moving door systems according to claim 1, it is characterized in that: described crossbeam (11) two ends are provided with hanger (44), it parallel between hanger (44) is provided with long guide pillar (45), sleeve assembly (6) is located on long guide pillar (45), and can be in the upper reciprocating motion of long guide pillar (45).

24. automatic moving door systems according to claim 23, it is characterized in that: between described hanger (44), be provided with two root length guide pillars (45), it is respectively equipped with a sleeve assembly (6) on each long guide pillar (45), one of them sleeve assembly (6) connects drive mechanism, and connects another sleeve assembly (6) by link gear.

25. automatic moving door systems according to claim 24, it is characterized in that: described link gear includes the roller being respectively arranged on each hanger (44) and the traction element (63) being arranged on roller, traction element (63) forms closed loop between the rollers 27 and 28, and the both sides of this closed loop traction element (63) are connected with each sleeve assembly (6) respectively.