CN105507729B - The nut assembly of automatic door drive system - Google Patents

Abstract

The invention discloses a kind of nut assembly of automatic door drive system, including gear frame, the nut being sheathed on screw mandrel, the follow-up unit that is fixed on nut；Nut is arranged in gear frame, gear frame connection door mechanism；Have in the gear frame and limit mechanism of the nut with screw mandrel rotational angle range, screw mandrel drive nut component is along screw mandrel axially reciprocating.The form being engaged relative to nut assembly of the prior art needs with chute of the present invention, it is not necessary to chute, therefore structure is more succinct, operation is also more steady, due to forming, its overall number of components is few therefore easy to process and deadweight is small, it is not necessary to excessive installing space.

Description

The nut assembly of automatic door drive system

Technical field

The present invention relates to automatic control system field, specifically a kind of nut assembly of automatic door drive system.

Background technology

Screw drives control system, generally electric motor driven screw, the nut assembly being arranged on screw rod is driven to carry out past Multiple motion, and then drive the controlled device being connected with nut assembly.Typically, screw drives control system more application is in rail Sect, electrically operated gate field, it also has locking and unlocking function simultaneously.It is commonly used to the screw drives control system in above-mentioned field System, is locked by electromagnetic lock to nut assembly, and then realizes the function of locking a door.The screw drives control system of this form, Electromagnetic lock must be powered the stability that just can guarantee that and lock a door at any time, if after electromagnetic lock power-off, can have door and automatically open up wind Danger, and enter line-locked structure on the door with mechanical lock in the prior art, the problem of complicated mostly be present, as mainly by machine The system that tool structure is formed, to realize preferable locking effect, the structure of nut assembly is typically more complicated, it is necessary to special cunning Groove coordinates, complicated to bring poor reliability, from the problems such as great, whard to control, especially applied to public transport field When, the personal safety of passenger can be threatened during failure.

The content of the invention

Goal of the invention：A kind of nut assembly of automatic door drive system provided by the invention, should to solve in the prior art The problem of being automatically opened up with the power-off back door present in the door system of electromagnetic lock, and present in the door system of application mechanical lock Nut assembly it is complicated, it is necessary to special chute coordinates, from great, the problems such as being difficult to control.

Technical scheme：In order to solve the above technical problems, a kind of nut assembly of automatic door drive system of the present invention, including Gear frame, the nut being sheathed on screw mandrel, the follow-up unit being fixed on nut；Nut is arranged in gear frame, and gear frame connects Jie Men mechanisms；Have in the gear frame and limit mechanism of the nut with screw mandrel rotational angle range, screw mandrel drive nut component is along silk Bar axially reciprocating

Further, the gear frame has the installation portion being connected with controlled device, and installation portion upwardly extends to be formed by four The nut installation portion that root post is formed, nut is arranged in the space that four root posts are formed, wherein towards the two of crossbeam side Root post top, which is provided with, limits spacer pin of the nut with screw mandrel rotational angle range.

Further, the external diameter of the nut is more than the distance between two heel posts.

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

Further, the mounting seat has a screw, and follow-up unit has a screw rod, and screw rod is screwed in screw, makes to be servo-actuated Part is fixedly connected with nut.

Further, the follow-up unit is roller.

Further, the outer ring both sides of the nut are respectively between corresponding adjacent upright posts, screw mandrel by nut outside Circle driving gear frame moves axially along screw mandrel.

Further, the elastomeric element for applying twisting resistance to nut is also included in the nut assembly.

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

Further, the nut outer ring is outward extended with block, and one end is ridden against on the block.

Beneficial effect：The nut assembly of a kind of automatic door drive system of the present invention, relative to nut of the prior art Component needs the form being engaged with chute, it is not necessary to chute, therefore structure is more succinct, operation is also more steady, due to forming Its overall number of components is few therefore easy to process and deadweight is small, it is not necessary to excessive installing space.

Brief description of the drawings

Fig. 1 is schematic structural view of the invention；

Fig. 2 is the combining structure schematic diagram of nut assembly and gear frame；

Fig. 3 is gear frame structural representation；

Fig. 4 is nut structure diagram；

The structural representation for the double open plug door that Fig. 5 is applied for the present invention；

Fig. 6 is the assembled state partial schematic diagram of fixed mount and crossbeam；

Fig. 7 is that Fig. 6 left part hides the partial schematic diagram of mounting bracket；

Fig. 8 is the assembled state partial schematic diagram of crossbeam, mounting bracket, hanger, long guide pillar and synchronizing bar；

Fig. 9 is the position view between guide and limit bar and limiting plate under door closure state；

Figure 10 is the position view between guide and limit bar and limiting plate in the state of door is opened；

Figure 11 is the first embodiment for being oriented to closing piece；

Figure 12 is second of embodiment for being oriented to closing piece；

Figure 13 is guiding closing piece and position-limit mechanism, the mated condition schematic diagram of follow-up unit；

Figure 14 is man-operated mechanism structural representation；

Figure 15 is the structural representation for including link gear on crossbeam.

Embodiment

The present invention is further described below in conjunction with the accompanying drawings.

The nut assembly of automatic door drive system as shown in Figures 1 to 4, including nut 31 and connect with the rigidity of nut 31 The follow-up unit 7 connect, nut 31 and screw mandrel 2 form screw pair, are provided with gear frame 9 in the outside of nut 31, gear frame 9 with It can be movable relatively between nut 31, gear frame 9 connects door mechanism；Torsion spring 10, torsion spring 10 are provided between gear frame 9 and nut 31 Pressure is applied to follow-up unit 7 for support with gear frame 9, gear frame 9 connects controlled device 6, in a particular application, this controlled pair As 6 can be the electronic of the Electric plug sliding door either vehicle such as the door leaf of sliding door system or bus of subway in field of track traffic Door.And also have in gear frame 9 and limit nut 31 with the mechanism of the rotational angle range of screw mandrel 2, the mechanism is a space, nut Follow-up unit 7 on 31 moves up and down with nut 31 within this space, and the top and bottom in the space define follow-up unit 7 Slewing area, and then define slewing area when nut 31 moves with screw mandrel 2.

Gear frame 9 has the installation portion 91 being connected with controlled device 6, and installation portion 91 upwardly extends to be formed by four root posts 92 The nut installation portion of composition, nut 31 are arranged in the space that four root posts 92 are formed, and the two root posts 92 of side are pushed up wherein End be provided with limit nut 31 with the rotational angle range of screw mandrel 2 spacer pin 12, therefore, the bottom of this two root posts 92 with it is spacing Rotation space when nut 31 rotates with screw mandrel 2 is formd between pin 12, spacer pin 12 is above-mentioned upper end, and two root posts The bottom in space is then lower end between 92.The external diameter of nut 31 is more than the distance between two heel posts 92, therefore nut 31 is limited Make in the space between two heel posts 92, when nut 31 moves, by applying thrust to the column 92 of not homonymy, drive and pass Moving frame 9 is moved with nut 31, and nut 31 is made up of inner ring and outer ring, and inner ring coordinates with screw mandrel, and outer ring is enclosed on inner ring simultaneously Cooperated by anti-slop serrations, outer ring is outward extended with the mounting seat of follow-up unit 7, and mounting seat has a screw, and follow-up unit 7 has One screw rod, screw rod are screwed in screw, follow-up unit 7 is fixedly connected with nut 31.Follow-up unit 7 can use roller, But the small part of the smooth running resistance in other types surface, the smooth sliding shoe in such as surface.In nut assembly 3 also include to Nut 31 applies twisting resistance torsion spring 10, and one end is ridden against on gear frame 9, and the other end is ridden against on nut 31, and torsion spring uses Internal diameter is more than the model of the screw mandrel diameter coordinated with nut, and is enclosed on outside screw mandrel, and the outer ring of nut 31 is outward extended with block 32, one end is ridden against on the block 32.

The nut assembly of the automatic door drive system of the present invention, can be applied to stopping sliding door or the shifting in track communicating door field Door system, it is applied to the mode of double open plug door system with reference to it, the present invention is described in detail.

As shown in figure 5, the double open plug door system applied of the present invention, including fixed mount 40, it is arranged on fixed mount 40 Plug draw track 41, crossbeam 11 and be used to drive the drive mechanism that moves back and forth of a side door on crossbeam 11, with driving What mechanism coordinated is used to draw the link gear that another side door moves back and forth；Drive mechanism connection active sleeve assembly 6, actively covers Cartridge module 6 draws driven socket component 61 by link gear, link gear driving drive the door 48 of active sleeve assembly 6 with from The door 48 of moving sleeve component 61 is opposite or moves opposite to each other, and active sleeve assembly 6 is with driven socket component 61 respectively by taking door Frame connects two side doors 48；The roller for drawing track 41 to be engaged with plug is additionally provided with driven socket component 61；At crossbeam both ends point Other mounting hung rack 49, parallel between hanger 49 that two root long guide pillars 50 are housed, active sleeve assembly 6 is distinguished with driven socket component 61 It is sleeved on different long guide pillars 50, and can be moved back and forth on each corresponding long guide pillar 50, each long both ends of guide pillar 50 passes through Hanger 49, and rolling member is installed in end, rolling member is the device or parts that bearing etc. has rolling function, in fixation One group of mounting bracket 43 is set on frame 40, and rolling member is engaged with being arranged on the slideway of the inner side of mounting bracket 43.Mounting bracket A piece synchronizing bar for being capable of axial rotation 47 can also be set between 43, and the both ends of synchronizing bar 47 are fixedly connected with transmission arm 64, each Transmission arm 64 is flexibly connected by connecting rod with hanger 49.As shown in figure 15, link gear includes being separately mounted to each hanger 49 On roller and the traction element 63 that is wound on roller, traction element 63 form closed loop between the rollers 27 and 28, closed loop traction One side of part 63 is connected with active sleeve assembly 6, and another side is connected with driven socket component 61, and traction element 63 can be Timing belt, steel wire rope, driving-chain etc., gear is replaced by using roller during driving-chain.

As shown in Fig. 7 to Figure 14, motor 1 that drive mechanism includes being fixed on crossbeam 11, closing piece 51 and spacing is oriented to Mechanism 4, motor 1 are connected with controller；The axis connection screw mandrel 2 of motor 1, it is complete on screw mandrel 2 to be configured with nut assembly 3；Nut Component 3 includes nut 31 and follow-up unit rigidly connected with nut 31 7, and nut 31 forms screw pair with screw mandrel 2, The outside of nut 31 is provided with gear frame 9, can be movable relatively between gear frame 9 and nut 31；Set between gear frame 9 and nut 31 There is torsion spring 10, torsion spring 10 applies pressure for support with gear frame 9 to follow-up unit 7, and gear frame 9 connects active sleeve assembly 6, silk During bar 2 rotates forward, drive nut 31 moved simultaneously with follow-up unit 7, when move to follow-up unit 7 and guiding closing piece 51 After contact, follow-up unit 7 moves downwardly to position-limit mechanism 4 and stopped by the position-limit mechanism 4 being oriented to leading for closing piece 51 upper surface, Follow-up unit 7 is rotated into the space being oriented between the side of closing piece 51 and position-limit mechanism 4 with screw mandrel 2 and is locked；Screw mandrel 2 is anti- To when rotating, follow-up unit 7 is rotated backward to the limitation for departing from guiding closing piece 51 and unlocked with screw mandrel 2, then along screw mandrel 2 It is axially moved.Being oriented to closing piece 51 has one towards the side of position-limit mechanism 4, is formed to fall between the side and position-limit mechanism 4 Enter the space of follow-up unit 7.Side is the inclined-plane that can limit the ejection of follow-up unit 7, and the angle between side and vertical plane is 0-10 °, in this angular range, active force can be applied to follow-up unit 7 by being oriented to closing piece 51, will not be led again because angle is excessive Cause follow-up unit 7 by it is locked the problem of, the angle is preferably 3 °.And there is restriction nut 31 to be rotated with screw mandrel 2 in gear frame 9 The mechanism of angular range, the mechanism are a space, and the follow-up unit 7 on nut 31 is transported with nut about 31 within this space Dynamic, the top and bottom in the space define the slewing area of follow-up unit 7, and then when defining that nut 31 moves with screw mandrel 2 Slewing area.

As shown in fig. 7, as the first embodiment, being oriented to closing piece 51 has a guiding follow-up unit 7 to position-limit mechanism 4 Mobile smooth upper surface, in the motion process of follow-up unit 7, when it is not with being oriented to 51 upper surface of closing piece, it is in Free state, the i.e. lower end positioned at the space that above-mentioned restriction follow-up unit 7 rotates, are arranged between nut 31 and gear frame 9 Torsion spring 10 may be configured as being in relaxation state or less compressive state, not apply twisting resistance to nut 31, or to nut 31 apply less twisting resistance, can make nut 31 in driving follow-up unit 7 to run, more steadily.When follow-up unit 7 is by leading During to 51 upper surface of closing piece, torsion spring 10 is compressed, and applies torsion to nut 31, thereby it is ensured that follow-up unit 7 can contact To after limiting plate 13, the twisting resistance for driving nut 31 and torsion spring 10 to apply is rotated by screw mandrel 2, limiting plate can be smoothly entered Space between 13 and guiding closing piece 51.

As shown in figure 8, as second of embodiment, also it is installed with what is moved for follow-up unit 7 on crossbeam 11 Slide rail 5, the slide rail 5 connects with guiding closing piece 51 and the upper surface with being oriented to closing piece 51 seamlessly transits, specifically, being oriented to closing piece 51 Slide rail 5 is arranged on close to one end of limiting component, and there is horizontal upper surface, is connected with the upper surface of slide rail 5 as one Integral level surface.After setting slide rail 5, follow-up unit 7 i.e. with the upper surface of slide rail 5 and can back and forth transport on this upper surface Dynamic, under this setup, follow-up unit 7 is located between the top and bottom in the space of above-mentioned restriction follow-up unit 7 rotation, Not with upper end or lower end in contact, now the torsion spring 10 between nut 31 and gear frame 9 be in compressive state, when follow-up unit 7 is transported Move after being contacted with limiting plate 13, the torsion that screw mandrel 2 rotates the power for driving nut 31 to rotate and torsion spring 10 applies to nut 31 Power, it ensure that follow-up unit 7 can smoothly enter limiting plate 13 and the space being oriented between closing piece 51.Slide rail 5 is set, makes to be servo-actuated Part 7 moves under the limitation of slide rail 5, can further increase the stationarity of the motion of nut assembly 3.

As shown in Fig. 9 to Figure 12, gear frame 9 is upward with the installation portion 91 being connected with active sleeve assembly 6, installation portion 91 Extension forms the nut installation portion being made up of four root posts 92, and nut 31 is arranged in the space that four root posts 92 are formed, at it In towards the side of crossbeam 11 the top of two root posts 92 be provided with limit nut 31 with the rotational angle range of screw mandrel 2 spacer pin 12, therefore, nut 31 is formd between the bottom of the two root posts 92 of spacer pin 12 and the side of crossbeam 11 and spacer pin 12 with screw mandrel 2 Rotation space during rotation, spacer pin 12 is above-mentioned upper end, and the bottom in space is then lower end between two root posts 92.Spiral shell The external diameter of mother 31 is more than the distance between two heel posts 92, therefore nut 31 is limited in the space between two heel posts 92, When nut 31 is axially moved along screw mandrel 2, by applying thrust to the column 92 of not homonymy, gear frame 9 is driven with nut 31 1 Motion is played, nut 31 is made up of inner ring and outer ring, and inner ring coordinates with the screw thread of screw mandrel 2, and outer ring is enclosed on inner ring and passes through anti-slop serrations Cooperate, outer ring is outward extended with the mounting seat of follow-up unit 7 towards the side of crossbeam 11, and mounting seat has a screw, is servo-actuated portion Part 7 has a screw rod, and screw rod is screwed in screw, follow-up unit 7 is fixedly connected with nut 31.Follow-up unit 7 can use rolling Wheel or the small part of the smooth running resistance in other types surface, the smooth sliding shoe in such as surface.Using roller with being oriented to Closing piece 51 is arranged in pairs or groups, and the running resistance of nut assembly 3 can be minimized when by being oriented to 51 surface of closing piece, lifting system Use stationarity.Respectively between corresponding adjacent upright posts 92, screw mandrel 2 is driven by the outer ring of nut 31 for the outer ring both sides of nut 31 Dynamic gear frame 9 moves axially along screw mandrel 2.Also included in nut assembly 3 to nut 31 and apply twisting resistance torsion spring 10, one end is taken Lean against on gear frame 9, the other end is ridden against on nut 31, and torsion spring is more than the model of the diameter of screw mandrel 2 using internal diameter, is enclosed on screw mandrel 2 Outside, the outer ring of nut 31 are outward extended with block 32, and one end is ridden against on the block 32.

As shown in figure 13, position-limit mechanism 4 includes a limiting plate 13 being arranged on crossbeam 11, and the limiting plate 13 has face To the side for being oriented to closing piece 51, the side is configured to fall into the space of follow-up unit 7, limiting plate with being oriented to the side of closing piece 51 13 are rotatably installed on crossbeam 11 by bearing pin 14, and the limiting plate 13 has the riser of bending towards the side of closing piece 51 is oriented to 26, manufactured when the angle of the riser 26 is according to practical application, specifically, when follow-up unit 7 does not contact with riser 26, the bending The upper semisection of riser 26 is vertical, and lower semisection is bent to the direction for being oriented to closing piece 51, and after follow-up unit 7 contacts with riser 26, Driving limiting plate 13 rotates, and after stopping is rotated, lower semisection is changed into vertical direction, and upper semisection is curved to the direction for being oriented to closing piece 51 Folding, the bending degree of riser 26, sets, if the rotational angle of limiting plate 13 is α according to the rotational angle of limiting plate 13, then vertical The angle at folded obtuse angle is 180 ° of-α between the upper semisection and lower semisection of plate 26；It is additionally provided between limiting plate 13 and bearing pin 14 multiple Position spring, back-moving spring can be torsion spring, and 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 can switch 15 in spinning movement by its edge triggered signal, and waist is provided with limiting plate 13 Hole 27, spacer pin 19 is provided with crossbeam 11, and spacer pin 19 stretches into the limitation anglec of rotation of limiting plate 13 in waist hole 27.

As shown in Figure 5, Figure 6, guide and limit bar 42 is additionally provided with fixed mount 40, its one end is fixed with fixed mount 40 to be connected Connect, the other end is free end；Limiting plate 13 is rotatably installed on crossbeam 11, when two side doors 48 are in drive mechanism and gear When being closed under the drive of structure, the rotation of limiting plate 13 limits a trailed side door until the free end of stop guide and limit bar 42 Return；When two side doors 48 are opened under the drive of drive mechanism and link gear, limiting plate 13 inverts and releases and limit being oriented to The stop of the position free end of bar 42, makes a trailed side door back move, limiting plate 13 is inverted and released to guide and limit bar 42 After the stop of free end, guide and limit bar 42 approaches the edge of limiting plate 13, and limitation limiting plate 13 rotates.

As shown in Figure 13, Figure 14, position-limit mechanism 4 also includes a man-operated mechanism, and the man-operated mechanism is arranged on including one Fixed support 20 on crossbeam 11 and a travel(l)ing rest 17 being arranged on bearing pin 14, reset bullet is installed between two supports Spring, back-moving spring can be torsion spring, and in bearing pin 14, its one end is fixed on fixed support 20 torsion spring set, and the other end props up with activity Frame 17 is fixedly connected, and travel(l)ing rest 17 can be by follow-up unit 7 between guiding closing piece 51 and position-limit mechanism 4 in rotary course Space in transfer to, specifically, the slide block 21 of a bending can be set in the bottom of travel(l)ing rest 17, slide block 21 is from servo-actuated portion The lower section of part 7 transfers to it from the space being oriented between closing piece 51 and position-limit mechanism 4, and travel(l)ing rest 17 can manually drawstring 8 Driving is rotated around bearing pin 14, and manual drawstring 8 is connected with solution lock-switch, and it can be a manual knob to solve lock-switch, energy during rotation Enough pull manual drawstring 8.In actual applications, it is actual installed in the position that subway inwall etc. can make one to readily access Put.When turn solution lock-switch drives travel(l)ing rest 17 to be rotated with bearing pin 14 for center of rotation, slide block 21 promotes servo-actuated portion Part 7 moves upwards.Travel(l)ing rest 17 is arranged on same bearing pin 14 with limiting plate 13, and the two will not interfere between each other, and And integrated level is high, can save installing space.

A kind of double open plug door system of the present invention, can be divided into following motion process and state：

1st, it is electronic to lock a door：Controller sends signal to motor 1, rotates the drive screw 2 of motor 1, screw mandrel 2 passes through nut group Part 3 drives follow-up unit 7 axially to be moved along screw mandrel 2 to position-limit mechanism 4, when follow-up unit 7, which touches, is oriented to closing piece 51, is leading Move downwardly to limiting plate 13 to leading for the upper surface of closing piece 51 and stopped by the limiting plate 13, follow-up unit 7 with screw mandrel 2 rotate into Enter to be oriented to the space between the side of closing piece 51 and limiting plate 13 and be locked, in the process, limiting plate 13 is rotated, and triggering is set Signaling switch 15 thereunder is put, after signaling switch 15 sends signal in place to controller, controller controlled motor 1 stalls, Completion is locked a door.Now, limiting plate 13 is blocked in the free end of guide and limit bar 42 front portion, when link gear fails, due to actively The door of sleeve assembly 6 has been directed to closing piece locking, therefore will not be opened easily.And if without guide and limit bar 42, it is driven The door of the side of sleeve assembly 61 can be then manually opened, and driven whole crossbeam to carry out plug and pulled work.There is provided guide and limit Bar 42, plug, which pulls, to be made to be blocked, therefore even if pulling the door of the side of driven socket component 61 manually, can not be opened.

2nd, electric open-door：Controller to motor 1 send signal, make motor 1 drive screw mandrel 2 rotate backward, follow-up unit 7 with Screw mandrel 2 is rotated backward to the limitation for departing from guiding closing piece 51 and unlocked, and is departed from limiting plate 13, and limiting plate 13 is in torsion spring In the presence of return, release the stop to guide and limit bar 42, trigger signal switch 15 sends unlocking signal to controller, then Limiting component is axially moved along screw mandrel 2.When follow-up unit 7 moves to 2 other end of screw mandrel, motor 1 stalls, and completes to open the door, this When top of the guide and limit bar 42 in limiting plate 13 and the reversed turning of limiting plate 13 can be limited, avoid false touch signaling switch.

3rd, lock a door manually：Manual actuation active sleeve assembly 6, nut assembly 3 is set axially to be transported in screw mandrel 2 to position-limit mechanism 4 Dynamic, now screw mandrel 2 is passive rotation.When follow-up unit 7, which touches, is oriented to closing piece 51, the guiding of the upper surface of closing piece 51 is being oriented to Under move to limiting plate 13 and stopped by the limiting plate 13, follow-up unit 7 be rotated into screw mandrel 2 be oriented to the side of closing piece 51 with Space between limiting plate 13 and be locked, in the process, limiting plate 13 rotates, and triggering sets signaling switch thereunder 15, after signaling switch 15 sends signal in place to controller, controller controlled motor 1 stalls, and completes to lock a door.

4th, open Door by Hand：During the locked door condition of both sides, lock-switch is solved by rotating so that the manual pulling activity of drawstring 8 branch Frame 17 is done rotationally clockwise around bearing pin 14, and the slide block 21 of travel(l)ing rest 17 stirs follow-up unit 7 from bottom, makes to be servo-actuated Part 7 leaves latched position, while torsion spring driving limiting plate 13 rotates clockwise around bearing pin 14, and trigger signal switch 15, pine After unwinding lock-switch, travel(l)ing rest 17 rotates to original position under the driving of back-moving spring, then manual actuation controlled device 6, nut assembly 3 is axially moved in screw mandrel 2 to the direction away from position-limit mechanism 4, realization opens Door by Hand.

Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims (9)

1. A kind of 1. nut assembly of automatic door drive system, it is characterised in that：Including gear frame（9）, be sheathed on screw mandrel（2）On Nut（31）, be fixed on nut（31）On follow-up unit（7）；Nut（31）Installed in gear frame（9）It is interior, gear frame（9）Even Jie Men mechanisms；The gear frame（9）In have restriction nut（31）With screw mandrel（2）The mechanism of rotational angle range；Screw mandrel（2）Driving Nut assembly（3）Along screw mandrel（2）Axially reciprocating；The gear frame（9）Have and controlled device（6）The installation portion of connection （91）, installation portion（91）Upwardly extend to be formed by four root posts（92）The nut installation portion of composition, nut are arranged on four root posts （92）In the space of composition, wherein towards crossbeam（11）The two root posts of side（92）Top is provided with restriction nut（31）With Screw mandrel（2）The spacer pin of rotational angle range（12）.
2. 2. the nut assembly of automatic door drive system according to claim 1, it is characterised in that：The nut（31）It is outer Footpath is more than two heel posts（92）The distance between.
3. 3. the nut assembly of automatic door drive system according to claim 1, it is characterised in that：The nut（31）By interior Circle and outer ring are formed, inner ring and screw mandrel（2）Screw thread coordinates, and outer ring is enclosed on inner ring and cooperated by anti-slop serrations, outer ring face To crossbeam（11）Side is outward extended with follow-up unit（7）Mounting seat.
4. 4. the nut assembly of automatic door drive system according to claim 3, it is characterised in that：The mounting seat has a spiral shell Hole, follow-up unit（7）There is a screw rod, screw rod is screwed in screw, makes follow-up unit（7）And nut（31）It is fixedly connected.
5. 5. the nut assembly of the automatic door drive system according to claim any one of 1-4, it is characterised in that：It is described servo-actuated Part（7）For roller.
6. 6. the nut assembly of automatic door drive system according to claim 3, it is characterised in that：The nut（31）It is outer Both sides are enclosed respectively positioned at corresponding adjacent upright posts（92）Between, screw mandrel（2）Pass through nut（31）Outer ring drives gear frame（9）Along silk Bar（2）Axial movement.
7. 7. the nut assembly of automatic door drive system according to claim 1, it is characterised in that：The nut assembly（3） In also include to nut（31）Apply the elastomeric element of twisting resistance（10）.
8. 8. the nut assembly of automatic door drive system according to claim 7, it is characterised in that：The elastomeric element（10） For torsion spring, one end rides against gear frame（9）On, the other end rides against nut（31）On.
9. 9. the nut assembly of automatic door drive system according to claim 8, it is characterised in that：The nut（31）Outer ring It is outward extended with block（32）, one end rides against the block（32）On.