CN207453745U - The transmission component of automatic door drive system - Google Patents

Abstract

The utility model discloses a kind of transmission components of automatic door drive system, including gear frame, the nut assembly being sheathed on screw, fixed locking idler wheel over the nut component, nut assembly is mounted in gear frame, the lower end of gear frame is connected with controlled device, and screw driving nut assembly drives gear frame to connect controlled device along screw axially reciprocating；Backing pin is fixed on gear frame, with offering limit hole at the corresponding nut assembly of the backing pin, can be slidably reciprocated in backing pin one end insertion limit hole and along limit hole, to limit rotational angle range of the nut assembly with screw.The structure that nut assembly is connected with gear frame by axle sleeve with clamp spring in the utility model is not generated and moved radially and stable drive, also passes through concealed backing pin and limit hole realizes rotation angle of the control nut assembly with respect to gear frame；Structure is more succinct, and operation is also more steady, few due to forming its whole number of components, and easy to process and dead weight is small, and excessive installation space is not required.

Description

The transmission component of automatic door drive system

Technical field

The utility model is related to automatic control system fields, are specifically a kind of transmission component of automatic door drive system.

Background technology

Screw drives control system, generally electric motor driven screw drive the nut assembly being arranged on screw rod to carry out past Multiple movement, and then drive the controlled device being connected with nut assembly.Typically, the transmission component of automatic door drive system is more Applied to Rail Door, electrically operated gate field, also there is locking and unlocking function simultaneously.It is usually applied to the automatically-controlled door in above-mentioned field The transmission component of drive system locks nut assembly by electromagnetic lock, and then realizes the function of locking a door.This form from The transmission component of dynamic door drive system, electromagnetic lock must be powered the stability that just can guarantee and lock a door at any time, if electromagnetic lock power-off Afterwards, then risk can be automatically opened there are door, and in the prior art with mechanical lock on the door into line-locked structure, there are structures mostly It is the problem of complicated, complicated to bring poor reliability as the system being mainly made of mechanical structure, it is not easily-controllable from great The problems such as processed, especially when applied to public transport field, can threaten the personal safety of passenger.

Utility model content

Purpose of utility model：A kind of transmission component of automatic door drive system provided by the utility model, it is existing to solve In technology, the door of the problem of being automatically opened using the power-off back door present in the door system of electromagnetic lock and application mechanical lock It is complicated present in system, from the problems such as great, not easy to control.

Technical solution：In order to solve the above technical problems, a kind of transmission component of automatic door drive system of the utility model, Including gear frame, the nut assembly being sheathed on screw, fixed locking idler wheel over the nut component, nut assembly, which is mounted on, to be passed In moving frame, the lower end of gear frame is connected with controlled device, and screw driving nut assembly drives gear frame to connect controlled device along silk Bar axially reciprocating；Backing pin is fixed on the gear frame, with offering limit hole at the corresponding nut assembly of the backing pin, It can slidably reciprocate in backing pin one end insertion limit hole and along limit hole, to limit rotational angle model of the nut assembly with screw It encloses.

Wherein, the lower end of the gear frame has the mounting portion being connected with controlled device, and the upper end of the gear frame has For being arranged the sleeve of nut assembly.

Preferably, the nut assembly is installed in the endoporus of gear frame sleeve, and one end of the gear frame sleeve passes through The axial movement of clamp spring and axle sleeve the limitation nut assembly set gradually from outside to inside, the other end by setting successively from outside to inside The axial movement of step surface and axle sleeve the limitation nut assembly of some gear frame sleeves.

Furthermore the nut assembly is made of inner ring and outer ring, and outer ring extends outwardly towards bearing support one side to be useful for The mounting base of locking idler wheel is installed, screw hole is offered in the mounting base, there is a screw rod on locking idler wheel, screw rod screws in screw hole It is interior, and pass through nut and locking idler wheel is fixed in mounting base.

Further, race diameter phase of the internal diameter of the internal diameter of the right end sleeve of the gear frame, axle sleeve with nut assembly Adaptation, the outer diameter of the axle sleeve are adapted with the internal diameter of the left end sleeve of gear frame.

Furthermore the nut assembly is equipped with to apply the locking torsional spring of twisting resistance, the locking torsional spring to nut assembly One end ride against on gear frame, on the block that the outer ring that the other end rides against nut assembly extends outward.

Advantageous effect：The structure that nut assembly is connected with gear frame by axle sleeve with clamp spring in the utility model, is not produced Life moves radially and stable drive, also realizes rotation of the control nut assembly relative to gear frame by concealed backing pin and limit hole Angle；Structure is more succinct, and operation is also more steady, few due to forming its whole number of components, easy to process and dead weight It is small, excessive installation space is not required.

Description of the drawings

Fig. 1 is the structure diagram of transmission component in the utility model；

Fig. 2 is the side view of transmission component in the utility model；

Fig. 3 be Fig. 2 in A-A to sectional view；

Fig. 4 is the structure diagram under transmission component released state in the utility model；

Fig. 5 is the structure diagram under transmission component locking states in the utility model；

Fig. 6 is the structure diagram for concealing gear frame in the utility model in transmission component；

Fig. 7 is the assembling explosive view of Fig. 6；

Fig. 8 is the utility model overall structure diagram；

Fig. 9 is the mated condition schematic diagram of transmission component and interlock assembly in the utility model；

Figure 10 is the front view of locking mechanism in the utility model；

Figure 11 is the view before locking mechanism emergency release in the utility model；

Figure 12 is the view after locking mechanism emergency release in the utility model；

Figure 13 is the structure diagram of hand-operating unlocking mechanism in the utility model；

Figure 14 is the scheme of installation that lock support is solved in the utility model；

Figure 15 is the usage state diagram of hand-operating unlocking mechanism in the utility model；

Figure 16 is the reset state figure of hand-operating unlocking mechanism in the utility model.

Specific embodiment

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

As shown in Figure 1, the transmission component 5 includes gear frame 501, nut assembly 502 and connects with 502 rigidity of nut assembly The locking idler wheel 503 connect, nut assembly 502 form screw pair with screw 2, and nut assembly 502 is mounted on gear frame 501 It is interior, and nut assembly can relatively rotate in gear frame；Locking torsional spring 504 is set between gear frame 501 and nut assembly 502, Locking torsional spring 504 applies pressure using gear frame as support to locking idler wheel 503, and gear frame 501 is connected with controlled device.Such as Fig. 2 Shown in Fig. 3, backing pin 506 is fixed on above-mentioned gear frame 501, with being offered at the 506 corresponding nut assembly 502 of backing pin Limit hole 505,506 one end of backing pin insertion limit hole 505 is interior and can slidably reciprocate along limit hole 505, to limit nut assembly 502 form with 2 rotational angle range of screw, i.e. scope of activities of the backing pin 506 in limit hole 505 and limit nut assembly 502 With the space of 2 rotational angle range of screw, the locking idler wheel 503 on nut assembly 502 is within this space on nut assembly 502 Lower movement, the kidney-shaped hole length of limit hole 505 defines the slewing area of locking idler wheel 503, and then defines nut assembly 502 Slewing area when being moved with screw 2, as shown in Figure 4 and Figure 5.The lower end of above-mentioned gear frame 501 has to be connected with controlled device The mounting portion connect, the upper end of the gear frame 501 have the sleeve for being arranged nut assembly 502.Nut assembly 502 is installed on biography In the endoporus of 501 sleeve of moving frame, one end of 501 sleeve of gear frame passes through the clamp spring 509 and axle sleeve 507 that set gradually from outside to inside The axial movement of nut assembly 502 is limited, the other end passes through the step surface for 501 sleeve of gear frame being equipped with successively from outside to inside The axial movement of nut assembly 502 is limited with axle sleeve 508.Internal diameter, axle sleeve 507 and the axle sleeve 508 of the right end sleeve of gear frame 501 Race diameter of the internal diameter with nut assembly 502 be adapted, right end telescopic spindle generation of wherein gear frame 501 in, is as shown in Figure 3 The right end of gear frame 501.The outer diameter of the axle sleeve 507 is adapted with the internal diameter of the left end sleeve of gear frame 501, wherein gear frame 501 left end telescopic spindle is for the left end of gear frame 501 as shown in Figure 3.When nut assembly 502 is axially moved along screw 2, lead to It crosses and thrust is applied to the sleeve of both sides axle sleeve and gear frame 501, gear frame 501 is driven to be moved with nut assembly 502, nut Component 502 is made of inner ring and outer ring, and inner ring and 2 thread fitting of screw, outer ring is sleeved on inner ring and passes through anti-slop serrations phase interworking It closes, outer ring extends outwardly towards 3 one side of bearing support is useful for the mounting base of installation locking idler wheel 503, is opened up in the mounting base There is screw hole, there is a screw rod, screw rod is screwed in screw hole, and is passed through nut 510 and fixed locking idler wheel 503 on locking idler wheel 503 In in mounting base.Locking idler wheel 503 may also be the small component of the smooth running resistance in other types surface, such as the slip that surface is smooth Block etc..Nut assembly 502 is equipped with to apply the locking torsional spring 504 of twisting resistance, the locking torsional spring 504 to nut assembly 502 One end ride against on gear frame 501, on the block that the outer ring that the other end rides against nut assembly 502 extends outward, such as Fig. 6 Shown in Fig. 7.

The transmission component of the automatic door drive system of the utility model, can be applied to track communicating door field stopping sliding door or Person's sliding door system is applied to the mode of double open plug door system with reference to it, the utility model is described in detail.

As shown in Figure 8 and Figure 9, which includes the motor 1, the left and right symmetrically arranged lock that are fixed on bearing support 3 Slideway 9 and locking slideway 10 and locking mechanism 4 are closed, motor 1 is connected with controller；The axis connection screw 2 of motor 1, in screw 2 The upper complete structure phase for being configured with the transmission component 5 being symmetrical set and transmission component 6, transmission component 5 and transmission component 6 Together, the gear frame 501 of transmission component 5 connects controlled device 12, and the gear frame 501 of transmission component 6 connects controlled device 11, having In body application, the controlled device 11 and controlled device 12 also can be the Electric plug sliding door of subway or shifting in field of track traffic The electrically operated gate of door or other field；During screw 2 rotates forward, nut assembly 502 and locking idler wheel 503 are driven simultaneously Along 2 sliding motion of screw, move in locking mechanism 4 along left and right locking slideway and be blocked mechanism 4 and stop, locking idler wheel 503 The locking space between the side of 9/ locking slideway 10 of locking slideway and locking mechanism 4 is rotated into screw 2 and is locked；Silk When bar 2 rotates backward, locking idler wheel 503 is rotated backward to the limitation for departing from locking mechanism 4 with screw 2 and unlocked, then It is axially moved along screw 2.

As shown in Figure 1, the screw drives control system of the utility model can operate in double-door system, controlled device 11 It is slide cartridge with controlled device 12, two fan door controlled device 11 of connection is connected by taking door frame 14 with one side door leaf, controlled pair It is connected as 12 by taking door frame 13 with another door leaf.The both ends difference installing mechanism mounting bracket 7 of bearing support 3 and mechanism installation Frame 8, parallel equipped with long guide post 15 between rack mounting bracket 7 and rack mounting bracket 8, controlled device 11 and controlled device 12 cover respectively On long guide post 15, and it can be moved back and forth along long guide post 15.A kind of double open plug door system that the utility model is applicable in, each portion Cooperation between part is compact, and the structure of all parts is again relatively easy, not only steady in the process of running, but also is not susceptible to failure, And due to simple in structure, moreover it is possible to the weight of whole system is brought to decline, and into production cost reduction, in large-area applications in track Traffic, vehicle have good effect when fields.

The locking slideway 9 and locking slideway 10 for being useful for the movement of locking idler wheel 503, locking are fixedly mounted on bearing support 3 The upper surface of slideway 9 and locking slideway 10 is an integral level surface.After locking slideway 9 and locking slideway 10 are set, locking Idler wheel 503 is contacted with the upper surface of locking slideway 9 and locking slideway 10 and can moved back and forth on this upper surface, is set this Put under mode, locking idler wheel 503 be located at the utility model restriction locking idler wheel 503 rotate space top and bottom it Between, not with upper end or lower end in contact, the locking torsional spring 504 between nut assembly 502 and gear frame 501, which is in, at this time compresses shape State, after locking idler wheel 503, which is moved to, to be contacted with baffle plate assembly 402 and baffle plate assembly 407, screw 2, which rotates, drives nut assembly The twisting resistance that 502 power rotated and locking torsional spring 504 apply nut assembly 502, ensure that locking idler wheel 503 can be smooth The locking space and/or locking idler wheel 503 formed into baffle plate assembly 402 and 9 side of locking slideway can smoothly enter baffle The locking space that component 407 is formed with 10 side of locking slideway.Locking slideway 9 and locking slideway 10 are set, make locking idler wheel 503 It is moved under the limitation of locking slideway 9 and locking slideway 10, can further increase the stationarity of the movement of transmission component 5.

As shown in Figure 10, the utility model locking mechanism 4 includes mounting base 401 and left and right symmetrically arranged baffle group Part 402 and baffle plate assembly 407, mounting base 401 are fixedly connected with bearing support 3, also can be directly mounted on locking mechanism 4 and be held It carries on stent 3, i.e., bearing support 3 is used as mounting base.Baffle plate assembly 402 and baffle plate assembly 407 pass through fixing axle respectively 403 and fixing axle 408 is symmetrical is fixed on mounting base 401, baffle plate assembly 402 can be on mounting base 401 around fixation Axis 403 rotates, and baffle plate assembly 407 can also rotate on mounting base 401 around fixing axle 408, baffle plate assembly 402 and baffle plate assembly 407 slewing areas are symmetrical.One end of reduction torsion spring 404 is fixed on by axis pin 405 on mounting base 401, the other end with Baffle plate assembly 402 is fixedly connected and limits the rotation of baffle plate assembly 407；Reduction torsion spring 409 is fixed on installation by fixing axle 408 On bottom plate 401, one end is stuck on the notch 422 of mounting base 401.Above-mentioned baffle plate assembly 402 and baffle plate assembly 407 are bending Part, the bending part have towards the side of locking slideway 9 and locking slideway 10, the side and locking slideway 9 and locking slideway 10 Side be configured to fall into the locking space of locking idler wheel 503, the angle root of 407 bending of baffle plate assembly 402 and baffle plate assembly It is manufactured during according to practical application, specifically, the bending plate is 3 sections of bendings, ensures that locking idler wheel 503 can steadily fall into locking space It is interior；Baffle plate assembly 402 and baffle plate assembly 407 can distinguish trigger signal switch 406 and letter in spinning movement by its edge Number switch 411.

As shown in figure 13, locking mechanism 4 further includes a hand-operating unlocking mechanism, which includes unlock shift fork 412nd, lock support 414 and reduction torsion spring 418 are solved, unlock shift fork 412 is mounted on by fixing axle 408 on mounting base 401, and should Unlock shift fork 412 can be rotated around fixing axle 408；Reduction torsion spring 418 is fixed on by fixing axle 408 on mounting base 401, is resetted 418 one end of torsional spring by 410 /V of axis pin, be fixed on unlock shift fork 412 by one end.As shown in figure 14, solving lock support 414 has two Tiled configuration is symmetrically for the cantilever end for limiting locking idler wheel 503 and the connecting pin being connected with unlock shift fork 412, wherein cantilever The lower end in the locking space for above-mentioned limitation locking idler wheel 503 is held, the lower part of connecting pin offers U-type groove, and fixing axle 415 passes through U-type groove on solution lock support 414 is connected lock support 414 is solved with mounting base 401.It is further opened with limiting on mounting base 401 Position hole 421, unlock fork 412 are L-type part, open up connecting hole on an external part of the unlock fork 412, axis pin 413 is worn successively The connecting pin of the connecting hole reconciliation lock support 414 of unlock shift fork 412 is crossed, and in the limit hole 421 being inserted on mounting base 401, Realize unlock shift fork 412 with solving being connected for lock support 414；When unlocking the rotation of shift fork 412, solution lock support 414 can be driven It moves up and down, wherein limit hole 421 and fixing axle 415 define the vertical upper and lower motion range of solution lock support 414.Manual unlocking Mechanism further includes unlocking signal switch 416, and unlocking signal switch 416 is fixed by switch mounting 420 and mounting base 401 Connection.It unlocks and is fixed with switch triggering plate 419 on another external part of fork 412, the switch triggering plate 419 in spinning movement Unlocking signal switch 416 is can trigger, unlocks and unlock steel wire rope 417 is connected on fork 412, which is erected at On mounting base 401.As is illustrated by figs. 11 and 12, shift fork 412 is unlocked by the way that unlock steel wire rope 417 is pulled to drive its rotation, Shift fork 412 is unlocked in rotation process drives solution lock support 414 to move upwards, and solves two cantilever end lifting both ends of lock support 414 To certain altitude to leave locking space, trigger switch plate 419 triggers unlocking signal switch 416 and sends manually locking idler wheel 503 Unlocking signal completes manual unlocking, as shown in figure 15；Unlock steel wire rope 417 is unclamped, unlock shift fork 412 is in reduction torsion spring 418 Counter-rotating under the action of screen resilience, driving solution lock support 414 are moved downward and resetted, as shown in figure 16.Unlock steel wire rope 417 Be connected with solution lock-switch, solution lock-switch can be a manual knob, and when rotation, which can pull, unlocks steel wire rope 417.In reality In, the actual subway inner wall etc. that is mounted on can be made one on the position readily accessed.Unlock shift fork 412 and baffle Component 407 is mounted in fixing axle 408, and unlock shift fork 412, baffle plate assembly 402 and baffle plate assembly 407 are mounted on mounting base The same face, three will not interfere between each other, and integrated level is high, can save installation space.

A kind of screw drives control system of the utility model, can be divided into following motion process and state：

1st, it is electronic to lock a door：In the open state, motor 1 drives screw 2 to rotate to door, and screw 2 is driven by nut assembly 502 Dynamic locking idler wheel 503 is moved along locking slideway 9 to shutdown direction, and nut assembly 502 drives controlled device 12 by gear frame 501 Movement, controlled device 12 are connected with door leaf；Locking idler wheel 503 is slided at the right end of locking slideway 9, in 502 He of nut assembly Under the driving of locking torsional spring 504, locking idler wheel 503 is circumferentially rotated along screw 2, into the locking space on 9 right side of locking slideway, limit Position hole 505 and backing pin 506 limit the scope that circumferentially rotates of locking idler wheel 503, and locking idler wheel 503 drives baffle plate assembly 402 around solid Dead axle 403 rotates counterclockwise, and triggers pass signaling switch 406 sends left-hand door and closes signal in place in place, realizes unidirectional locking.It is another The transmission component 6 at end is moved along locking slideway 10 to shutdown direction, and nut assembly 502 passes through controlled pair of the driving of gear frame 501 As 11 movements, controlled device 11 is connected with door leaf；Locking idler wheel 503 is slided at the left end of locking slideway 10, in nut assembly 502 and locking torsional spring 504 driving under, locking idler wheel 503 is circumferentially rotated along screw 2, into the locking in the left side of locking slideway 10 Space, locking idler wheel 503 drive baffle plate assembly 407 to be rotated clockwise around fixing axle 408, and trigger pass signaling switch 411 in place You Menguan signals in place are sent, realize bidirectional electric locking.

2nd, electronic unlock：When door is in locking states, motor 1 drives screw 2 to rotate, and screw 2 is driven by nut assembly 502 Dynamic 503 wire winding rod 2 of locking idler wheel rotates, and locking idler wheel 503 is made to leave the locking space on 9 right side of locking slideway, simultaneously Reduction torsion spring 404 drives baffle plate assembly 402 to be rotated clockwise around fixing axle 403, and triggers pass signaling switch 406 in place, locking Idler wheel 503 leaves locking space and is moved along locking slideway 9 to enabling direction, and nut assembly 502 is driven controlled by gear frame 501 Object 12 moves, and controlled device 12 is connected with door leaf.The locking that the locking idler wheel 503 of the other end leaves 10 left side of locking slideway is empty Between, while reduction torsion spring 409 drives baffle plate assembly 407 to be rotated counterclockwise around fixing axle 408, and trigger pass signaling switch in place 411, locking idler wheel 503 leaves locking space and is moved along locking slideway 10 to enabling direction, and nut assembly 502 passes through gear frame 501 driving controlled devices 11 move, and controlled device 11 is connected with door leaf, realizes electronic unlock.

3rd, manual locking：In the open state, manual force is driven controlled door by the door leaf being connected with controlled device 12 Object 12 is moved to shutdown direction, and controlled device 12 drives nut assembly 502 along screw 2 to shutdown direction by gear frame 501 Movement, locking idler wheel 503 is slided at 9 right end of locking slideway, and under the driving of locking torsional spring 504, locking idler wheel 503 is along screw 2 circumferentially rotate, and into the locking space on 9 right side of locking slideway, locking idler wheel 503 drives baffle plate assembly 402 inverse around fixing axle 403 Hour hands rotate, and trigger pass signaling switch 406 sends left-hand door and closes signal in place in place.The other end, manual force by with controlled pair The door leafs driving controlled devices 11 being connected as 11 are moved to shutdown direction, and controlled device 11 passes through gear frame 501 and drives nut group Part 502 is moved along screw 2 to shutdown direction, and locking idler wheel 503 is slided at 10 left end of locking slideway, in locking torsional spring 504 Under driving, locking idler wheel 503 is circumferentially rotated along screw 2, and into the locking space in 10 left side of locking slideway, locking idler wheel 503 drives Dynamic baffle plate assembly 407 is rotated clockwise around fixing axle 408, and triggers pass signaling switch 411 sends You Menguan signals in place in place, Realize manual locking.

4th, manual unlocking：When door is in locking states, unlock shift fork 412 is pulled around fixing axle by unlocking steel wire rope 417 408 do rotationally clockwise, and switch triggering plate 419 triggers unlocking signal switch 416 in spinning movement, unlocks shift fork 412 Driving solution lock support 414 by axis pin 413, solution lock support 414 lifts left and right two along 415 lifting of limit hole 421 and fixing axle The locking idler wheel 503 of side makes locking position of the arranged on left and right sides locking idler wheel 503 respectively away from locking slideway 9 and locking slideway 10 It puts, while reduction torsion spring 404 drives baffle plate assembly 402 to be rotated clockwise around fixing axle 403, and trigger pass signaling switch in place 406, reduction torsion spring 409 drives baffle plate assembly 407 to be rotated counterclockwise around fixing axle 408, and triggers pass signaling switch 411 in place, Unlock steel wire rope 417 is resetted, unlock shift fork 412 rotates to initial position under the driving of reduction torsion spring 418 and drives unlock branch Frame 414 reduces, and left and right locking idler wheel 503 leaves each self-locking space and transported along locking slideway 9 and locking slideway 10 to enabling direction Dynamic, nut assembly 502 drives controlled device 11 and controlled device 12 to move by gear frame 501, controlled device 11 and controlled pair It is connected as 12 with door leaf, realizes manual unlocking.

The above is only the preferred embodiment of the utility model, it should be pointed out that：For the common skill of the art For art personnel, on the premise of the utility model principle is not departed from, several improvements and modifications can also be made, these improve and Retouching also should be regarded as the scope of protection of the utility model.

Claims (6)

1. a kind of transmission component of automatic door drive system, it is characterised in that：Including gear frame (501), it is sheathed on screw (2) Nut assembly (502), the locking idler wheel (503) that is fixed on nut assembly (502), nut assembly (502) is mounted on transmission In frame (501), the lower end of gear frame (501) is connected with controlled device, and screw (2) driving nut assembly (502) drives gear frame (501) controlled device is connected along screw (2) axially reciprocating；Backing pin (506) is fixed on the gear frame (501), with this Limit hole (505) is offered at backing pin (506) corresponding nut assembly (502), backing pin (506) one end insertion limit hole (505) can slidably reciprocate in and along limit hole (505), to limit rotational angle range of the nut assembly (502) with screw (2).

2. the transmission component of automatic door drive system according to claim 1, it is characterised in that：The gear frame (501) Lower end there is the mounting portion that is connected with controlled device, the upper end of the gear frame (501) has to be arranged nut assembly (502) sleeve.

3. the transmission component of automatic door drive system according to claim 2, it is characterised in that：The nut assembly (502) it is installed in the endoporus of gear frame (501) sleeve, one end of gear frame (501) sleeve is by from outside to inside successively Setting clamp spring (509) and axle sleeve (507) limitation nut assembly (502) axial movement, the other end by from outside to inside according to The axial movement of step surface and axle sleeve (508) the limitation nut assembly (502) of secondary gear frame (501) sleeve being equipped with.

4. the transmission component of automatic door drive system according to claim 3, it is characterised in that：The nut assembly (502) it is made of inner ring and outer ring, outer ring extends outwardly towards bearing support (3) one side is useful for installation locking idler wheel (503) Mounting base, screw hole is offered in the mounting base, there is a screw rod, screw rod is screwed in screw hole, and is passed through on locking idler wheel (503) Locking idler wheel (503) is fixed in mounting base by nut (510).

5. the transmission component of automatic door drive system according to claim 4, it is characterised in that：The gear frame (501) The race diameter with nut assembly (502) of internal diameter, the internal diameter of axle sleeve (507,508) of right end sleeve be adapted, the axis The outer diameter of set (507) is adapted with the internal diameter of the left end sleeve of gear frame (501).

6. the transmission component of automatic door drive system according to claim 1, it is characterised in that：The nut assembly (502) it is equipped with to apply the locking torsional spring (504) of twisting resistance, one end of the locking torsional spring (504) to nut assembly (502) It rides against on gear frame (501), on the block that the outer ring that the other end rides against nut assembly (502) extends outward.