CN205976777U - A electronic mechanism for locking device - Google Patents

Abstract

The utility model relates to a tool to lock technical field, more specifically say, especially relates to the electronic mechanism of trick lock, and it includes: a solid motor, a transmission shaft of fixing on motor shaft, but cover on the transmission shaft and axial displacement's cylindrical spring, but one establish the adjacent pin between two rings at the epaxial precession cylindrical spring of transmission, one with the casket of the coaxial setting of motor physically, its characterized in that: this casket body includes the cavity that can hold cylindrical spring and establishes the second spout on the casket body, cylindrical spring's both ends are provided with the retaining ring that stretches out in the cylindrical spring excircle, the retaining ring is located the second spout in order to prevent cylindrical spring to rotate. The utility model discloses a two and the half caskets body combines the structure of the cavity of back formation, forms the cambered surface of circumference equipartition, makes the ability of injecing cylindrical spring diameter runout show and improves to the operational reliability of device has been improved.

Description

A kind of motor drive mechanism for locking device

Technical field

This utility model is related to lock technology field, more specifically, the motor drive mechanism of more particularly, to coded lock.

Background technology

Present patent application is to make on the basis of technical scheme disclosed in Chinese patent CN201110244325.0 Improve.

Existing electronic password lock, the locking mechanism that commonly used micromotor drives.One of technical scheme therein is Using the helical spring being enclosed within rotating shaft and the pin being fixed in rotating shaft, the convert rotational motion of motor is spring and pin Between linear motion, and then push or pull on a barrier element with control dead bolt withdraw.

Due to cost reason, commonly used micro dc motor in electronic password lock.Due to micro dc motor manufacture Parameters decentralization present in process, and supplying cell change in voltage, its speed error is very big, even if adopting train of reduction gears Control the stroke with respect to helical spring for the pin with controlling conduction time also to be difficult to.Therefore in most cases, it is all row to bullet Spring end（Last lap）Place, if motor not yet power-off, the rotation or pin skids herein, or stall, thus produce relatively Big friction or cause spring shake and distortion.

When pin performs relative motion along spring coils, because spring is compressed by pin pressure, thus produce larger rubbing Wipe, this friction produces the power making spring rotate with axle again, easily cause spring and rotate and circular runout with axle, so that spring can not be put down Steady axial displacement, not only causes the abrasion between spring and slide block, and also can produce pin can not smooth precession spring spiral track The fault of mark.Meanwhile, the contact friction between pin and spring can cause the abrasion of pin and spring.

Technical scheme disclosed in Chinese patent CN201110244325.0, shakes and proposition of beating to controlling spring transfer The setting spring tertiary winding, to absorb the vibration that when buffering motor starts and turns to, pin pin produces and impact to spring, prevents Spring distortion or the technical measures beated.For solving the problems, such as pin and spring frictionally damage, CN201110244325.0 is not public Open technical scheme.

In sum, the shake that solution spring transfer causes and tripping problems also have other technological approaches can follow, pin Need to be resolved with spring frictionally damage problem, and for " pin is interacted with helical spring, by the rotation fortune of motor The dynamic linear motion being converted between helical spring and pin, and then push or pull on a barrier element to control dead bolt to receive Return " this technical theme, so as to performance is further enhanced there are further improved need for the motor drive mechanism of lock Ask.

Content of the invention

The purpose of this utility model is, provides a kind of motor drive mechanism of the lock that structure is simple, security reliability is high.

A kind of motor drive mechanism for locking device, including：One solid motor, fixation transmission on the motor Axle, one is enclosed within power transmission shaft and axially displaceable cylindrical spring, one be located on power transmission shaft can precession cylindrical spring phase Pin between adjacent two circles, a body with motors setting, this body includes accommodating the cavity of cylindrical spring and sets The second chute in body, the two ends of described cylindrical spring are provided with and stretch out in the cylindrical back-up ring of cylindrical spring, described back-up ring Positioned at the second chute to stop cylindrical spring from rotating.

Preferably, described second chute includes two symmetrically arranged inclined-planes, and described back-up ring is included by the two of cylindrical spring Two annulus that individual free end is formed, two annulus stretch out in cylindrical spring two ends, and the axis of annulus is hung down with cylindrical spring axis Directly, described inclined-plane and the anchor ring of back-up ring offset.

Preferably, described second chute includes two symmetrically arranged inclined-planes, and described back-up ring is included by the two of cylindrical spring Cervical region and the annulus being connected with cervical region that individual free end is formed, two annulus stretch out in the two ends of cylindrical spring, the axis of annulus With the diameter parallel of cylindrical spring, described inclined-plane is offseted with the cervical region of back-up ring.

Wherein, described body includes two the first half body of axisymmetrical setting along body and the second half body, institute State the first half body and the second half body combine the described cavity of rear formation, this cavity includes：Circular cylindrical cavity and being symmetrically set in The truncated cone cavity of circular cylindrical cavity both sides, radially the revolving around cylindrical spring axis with diameter greater than pin of described circular cylindrical cavity The diameter turning, the axis of small circle of truncated cone cavity is more than external diameter, the axis of great circle of truncated cone cavity and the circle of cylindrical spring Cylindrical chamber diameter is identical.

Wherein, the end of the end of described the first half body or the second half body is provided with buckle, described the second half body End or the end of the first half body be provided with the grab matching with buckle, the first half body and the second half body are equipped with use Rivet hole in riveting the first half body and the second half body.

Wherein, the first half body are symmetrically provided with depression with the second half corresponding faying faces of body, and this depression includes one Individual inclined-plane, the first half body and the second half body combine rear depression and form the second chute.

Preferably, the angle on two inclined-planes of described second chute is 35 degree to 45 degree.

Preferably, also include the bearing shell with pin cooperation, described power transmission shaft is provided with the bearing shell installing hole matching with bearing shell.

Preferably, described bearing shell is annular, and described pin includes two pins head to head arranging, and described pin has Head with diameter greater than bearing shell endoporus.

Preferably, also include a locating piece between two pin head.

Using the technical solution of the utility model, following Advantageous Effects can be obtained：

1. adopt the fit structure of two back-up rings and body second chute, back-up ring is contacted with the second chute inclined-plane or cambered surface, Uniform force, can efficiently reduce spring during stopping cylindrical spring transfer and beat and distortion.

2. adopt two and half body to combine the cavity body structure of rear formation, compared with the framework of prior art, cylinder will be limited The plane of spring circular runout becomes and becomes uniform cambered surface along cylindrical spring circumferential profile, makes restriction cylindrical spring circular runout Ability significantly improve, thus improve the operational reliability of motor drive mechanism.Additionally, the buckle structure in two and half body settings Solve half body strong bonded with rivet arrangement and be accurately positioned problem.

3., using the technical measures that the oil-containing bearing shell being slidably matched with pin is arranged on power transmission shaft, sliding friction is changed into Rolling friction, significantly reduces the friction of pin and cylindrical spring, efficiently solves the wear problem of pin and cylindrical spring.

4. part used by the technical solution of the utility model is few, and structure is simply it is easy to processing and installing.

Brief description

Fig. 1 is the perspective view of this utility model first embodiment.

Fig. 2 is the stereochemical structure decomposing schematic representation of this utility model first embodiment.

Fig. 3 is the perspective view of this utility model second embodiment.

Fig. 4 is the stereochemical structure decomposing schematic representation of this utility model second embodiment.

Fig. 5 is the perspective view of body described in the utility model.

Fig. 6 is the perspective view at another visual angle of body described in the utility model.

Fig. 7 is the perspective view of the cylindrical spring described in this utility model first embodiment.

Fig. 8 is the perspective view of the cylindrical spring described in this utility model second embodiment.

Fig. 9 is the schematic diagram that this utility model first embodiment is in the locked position in lock housing.

Figure 10 is the schematic diagram that this utility model first embodiment is in lockset position of coupler in lock housing.

Specific embodiment

For the ease of the understanding of those skilled in the art, this utility model is made further with accompanying drawing with reference to embodiment Explanation, the content that embodiment refers to is not to restriction of the present utility model.

Figures 1 and 2 show that the structure of first embodiment of the present utility model, Fig. 3 and Fig. 4 shows this utility model The structure of two embodiments.It can be seen that the motor 10 included by two embodiments, power transmission shaft 20 and body 40 are all phases With, and the profile of whole motor drive mechanism is all identical with size, and difference is helical spring 30 and helical spring 35 Back-up ring structure is different, and whether employs the bearing bush structure matching with pin 5.Two helical springs 30 and helical spring 35 are all It is symmetrically arranged at the back-up ring 34 at cylindrical spring 31 two ends including cylindrical spring 31 and two, wherein cylindrical spring 31 is identical, gear The shapes and sizes of circle 34 are also identical, and simply the length that back-up ring 34 stretches out and direction have for helical spring 30 and helical spring 35 Institute is different, and it is somewhat different to thus result in a few thing state of the present utility model, can be later with regard to this point and bearing bush structure Describe in detail.

In two embodiments of the present utility model, motor 10 adopts common DC micromotor, and power transmission shaft 20 can be adopted With metal material, it would however also be possible to employ composite engineering material makes, power transmission shaft 20 is fixed with motor drive shaft suit, and it adopts interference fit Fixing, the external cylindrical surface 21 of power transmission shaft 20 and the internal diameter of cylindrical spring 31 are slidably matched, in the external cylindrical surface 21 of power transmission shaft 20 Portion is vertically provided with installing hole 23, and after pin 5 loads installing hole, two ends are slightly cylindrical beyond cylindrical spring 31, and the diameter of pin 5 is slightly Less than cylindrical spring 31 spring pitch in a free state, in order to precession between two circles adjacent in spring.Power transmission shaft 20 After together with being attached to cylindrical spring 31 and pin 5, power transmission shaft 20, cylindrical spring 31 and the face of cylinder 21 are on the same axis.

Can be seen that described body 40 from Fig. 1 with reference to Fig. 5 and Fig. 6 and include two axisymmetrical settings along body 40 The first half body 41 and the second half body 42, described the first half body 41 and the second half body 42 combine the described cavity of rear formation 50, this cavity includes：Circular cylindrical cavity in the middle part of cavity and the truncated cone cavity being symmetrically set in circular cylindrical cavity both sides, Described circular cylindrical cavity with diameter greater than pin around cylindrical spring axis radial rotary diameter, the roundlet of truncated cone cavity is straight Footpath is more than the external diameter of cylindrical spring 31, and the axis of great circle of truncated cone cavity is identical with circular cylindrical cavity diameter.

Specifically, body 40 is made up of two symmetrical the first half body 41 and the second half body 42, the first half body 41 and the second half the shape of body 42 can be cylindrical half-shell or cuboid half-shell, each of which includes body The half of end 43, the half of body head 45, and the half of complete cavity 50.For complete cavity 50, in it Between be partly rotating diameter with diameter greater than pin 5 circular cylindrical cavity, the two side portions of circular cylindrical cavity are from cylindrical cavity Gradually to the truncated cone cavity of two ends transition, its minimum diameter is close to but slightly larger than cylindrical spring 31 external diameter to body.The first half The end of body 41 and the second half body 42 is provided with the diameter semicircle orifice more slightly larger than transmission collar 22 diameter, the first half body 41 It is the formation of after combining with the second half body 42 being driven collar 22 and can pass through circular hole, cylindrical spring 31 axial displacement is defined Between 50 two inner faces of cavity.

Can see with reference to Fig. 7 from Fig. 2, back-up ring 34 is that two being formed by two free ends of cylindrical spring 31 are symmetrical Annulus, it is cylindrical that back-up ring not only stretches out cylindrical spring 31, and has stretched out cylindrical spring 31 two ends.The axis of annulus and cylinder bullet Spring 31 axis is vertical, and after assembling, back-up ring 34 is located in the second chute 48 of body 40, the contact surface of back-up ring 34 and the second chute 48 It is two inclined-planes 47, when cylindrical spring 31 is subject to pin 5 frictional force transfer, a corresponding inclined-plane 47 props up back-up ring 34 and stops circle Post spring 31 rotates（During reversion, another inclined-plane props up back-up ring）.

Fig. 5 and Fig. 6 shows the structure of the first half body 41 and the second half body 42 it can be seen that the first half body 41 It is respectively provided with a depression with the second half corresponding faying faces of body 42, smooth inclined-plane 47 is located in this depression, the first half caskets Body 41 and the second half body 42 define second chute 48 with symmetrical slope, when cylindrical spring 31 occurs transfer after combining Back-up ring 34 can be touched on inclined-plane 47 with plane earth.Through measuring and calculating, the angle between the second chute 48 two inclined-plane 47 be 35 degree extremely When 45 degree, cylindrical spring 31 jitter amplitude is minimum.

After cylindrical spring 31 loads cavity 50, not only the scope of its axial displacement is limited exactly, and its radial direction Displacement or beat also is limited effectively.Although power transmission shaft 20 has restriction effect to the radial displacement of cylindrical spring 31, Because cylindrical spring 31 power transmission shaft 20 relatively will move between locking and the state unlocking, the gap between them is difficult If too small, otherwise can cause axial displacement obstacle during compression and release for the cylindrical spring 31 because of friction.Therefore, adopt Cylindrical body cavity 50 structure matching with cylindrical spring 31 profile can limit beating or trembling of cylindrical spring 31 effectively Dynamic, and then significantly increase motor drive mechanism operational reliability.Using the first half body 41 and the second half body 42 structures, Ke Yizeng Plus the contact area that cavity 50 is cylindrical with cylindrical spring 31, make body 40 that the restriction effect of cylindrical spring 31 is become apparent from.This Outward, this design of part also allows for processing.

Can be seen that end or the second half body 42 of described the first half body 41 from Fig. 5 and Fig. 6 with reference to Fig. 1 and Fig. 2 End be provided with buckle 51, the end of the end of described the second half body 42 or the first half body 41 is provided with and is matched with buckle 51 Grab, 52 the first half body 41 and the second half body 42 are equipped with for riveting the first half body 41 and the second half body 42 Rivet hole.Specifically, the combination fixed form of described the first half body 41 or the second half body 42 is in the first half body 41 Hes Outside the second half body 42 body end portions, the buckle 51 cooperating for a pair and grab 52 are set that is to say, that in one and half body Setting buckle 51, arranges grab 52 in another half body correspondence position, it is clear from fig. 3 that, they are one countershaft To entering the mutually groove of button and projection, i.e. groove in corresponding the second half body 42 of the first half body 41 upper protruding blocks, the first half caskets Projection in corresponding the second half body 42 of groove on body 41.In addition it is provided with rivet hole 53 in body head 45, with rivet 6 by Half body 41 or the second half body 42 are fixed together.In order to change position, by one and half body head rivet holes 53 Side arranges semicircular locating slot 54, the positioning strip 55 that the setting of another half body head is matched with locating slot 54.

Fig. 7 represents the structure of the helical spring 30 for first embodiment, and Fig. 8 shows the spiral shell for second embodiment The structure of rotation spring 35, the structure of two helical springs except back-up ring 34 stretch out mode difference in addition to, remainder is identical. In helical spring 30, the axis of back-up ring 34 is vertical with cylindrical spring 31, between back-up ring 34 and cylindrical spring end circle 31 There is a bending 37, when cylindrical spring 31 occurs transfer, the anchor ring of two back-up rings 34 is against wherein the one of the second chute 48 On individual inclined-plane 47, block cylindrical spring 31 transfer.When this external pin 5 precession is to bending 37 position, if motor not yet power-off, Pin 5 can be bent 37 to be stopped and can not be rotated further, and stall therefore occurs.

In helical spring 35, described back-up ring 34 include the cervical region 38 being formed by two free ends of cylindrical spring 31 and with The annulus that cervical region 38 connects, two annulus stretch out in the two ends of cylindrical spring 31, the axis of the axis of annulus and cylindrical spring 31 Parallel, described inclined-plane 47 is offseted with the cervical region 38 of back-up ring 34.Specifically, have between the annulus of back-up ring 34 and cylindrical spring 31 end circle One extension, that is, the cervical region 38 of back-up ring, this cervical region 38 smoothly extends out from the end of cylindrical spring 31 circle, and has There is an inclined-plane 47 identical inclination angle with the second chute 48, when cylindrical spring 31 occurs transfer, two back-up ring cervical regions 38 support On one of inclined-plane 47 of the second chute 48, stop cylindrical spring 31 transfer.Due to being flat between cylindrical spring and back-up ring Slip over the cervical region crossing, when pin rotation 5 proceeds to cervical region 38 position of back-up ring, if motor 10 not yet power-off, due to there is no spiral Line is available for pin precession, does not also stop the bending of pin 5 rotation, and pin 5 can skid in this position.It may be noted that this practicality The coiling direction of two back-up rings 34 in new is different, but their shape and size are identicals, and their position is Symmetrical, role is identical, therefore says that they are symmetrical.

Shown in Fig. 3 and Fig. 4, also including the bearing shell 4 with pin 5 cooperation, described power transmission shaft is provided with and is matched with bearing shell 4 Bearing shell installing hole 24.Specifically, bearing shell 4 is annular, is made up of wear-resisting oil-containing material, its endoporus is slidably matched with pin 5, Cylindrical with bearing shell installing hole 24 interference fit.Pin 5 includes two identical pins, and this pin has with diameter greater than bearing shell 4 endoporus are less than the head of bearing shell installing hole 24, and during assembling, the head of two pins relatively loads in bearing shell installing hole 24, then will Bearing shell 4 is formed for a complete pin 5 after being fixed in bearing shell installing hole 24, this complete pin 5 stretches out rotation shaft portion Diameter with height identical with the pin 5 of first embodiment.In order to avoid the contact friction of two pintle head, can also be A locating piece with bearing shell installing hole 24 interference fit is set between two stem knobs（In figure is to illustrate）.The benefit of setting bearing shell 4 Place is that between spring two adjacent rings during precession, except rotating with power transmission shaft 20, itself can also rotate pin 5, will original and bullet Sliding friction between spring is changed into rolling friction.Thus can be effectively reduced and reduce the abrasion of pin and spring, especially work as , in the cervical region 38 position slipping of back-up ring, now frictional force is maximum, is significantly reduced skidding using after bearing bush structure for pin 5 When friction.It may be noted that the technical scheme of above-mentioned bearing shell 4 can also be adopted in the first embodiment in this utility model, Although, pin 5 is bent 37 stops when back-up ring position and no longer rotates in the first embodiment, only exists pin 5 precession spring Relatively less friction, therefore can not select to adopt bearing bush structure to simplify structure.But after selecting to adopt bearing bush structure, can ground By pin 5 spring two adjacent rings precession frictional force be reduced to less.

The work process of two embodiments of this utility model is described below in conjunction with Fig. 9 and Figure 10.

As shown in figure 9, motor drive mechanism of the present utility model is arranged in a cam lock, body 40 is contained in lock housing 2 In first chute 3, in fig .9, body 40 is in extended position, and in this position, body head 45 is in occupation of the first chute left end Space, if will unlock, external force promote dead bolt 8 rotate be allowed to take in lock housing 2, the pendulum post 7 having matching relationship with dead bolt is simultaneously Rotate to drive block 9 to enter the space of the first chute right-hand member.Under not obtaining unlocking authorization conditions, because body head 45 stops Block 9, external force can not promote dead bolt 8 to rotate and take in lock housing 2, and dead bolt 8 is locked out like this.As it can be seen in figure 9 that casket When body 40 is in extended position, pin 5 is located at the right-hand member of cylindrical spring 31（Cylindrical spring is on the left side of pin in other words）, with the right side The bending 37 of the back-up ring 34 on side offsets, and two back-up rings are against on the inclined-plane 47 below body the second chute 48.

Shown in Figure 10, authorize that is to say, that the control unit of lock receives correct unlocking cipher if receiving and unlocking It is energized to motor 10 afterwards, motor 10 starts to be rotated clockwise（On the right side of motor）, pin 5 deasil starts to cylinder Spring 31 right-hand member precession, simultaneously cylindrical spring 31 to body 40 right-hand member move, when cylindrical spring 31 right-hand member touches body cavity Behind 50 ends, body 40 is promoted by cylindrical spring 31 and moves right, until body head 45 completely disengages from first originally occupying The space of chute 3 left end, now external force promotion dead bolt 8 rotates counterclockwise, and band movable pendulum post 7 rotates clockwise simultaneously, and pendulum post Drive block 9 to rotate counterclockwise again, make block enter the first chute 3, meanwhile dead bolt 8 takes in lock housing 2, and lock is opened.? This position, pin 5 is located at the left end of cylindrical spring 31（Cylindrical spring is on the right of pin in other words）, the back-up ring 34 on the left side curved Folding 37 stop pin 5 rotates, and back-up ring is against on the inclined-plane 47 above body 40 second chute 48.

After unlocking process terminates, external force cancels, and under the effect of dead bolt back-moving spring bias force, dead bolt 8 rotates back into locking shape State, carries movable pendulum post 7 to rotate counterclockwise simultaneously, and then drives block 9 deasil to produce from the first chute 3, now motor 10 leads to Electricity rotates counterclockwise, and pin 5, from cylindrical spring 31 left end precession cylindrical spring, promotes cylindrical spring to move to body 40 left end, And then promote body to be moved to the left, until body head 45 occupies the space of lock housing the first chute 3 left end, return to shown in Fig. 9 Lock-out state to dead bolt.

The work process of second embodiment is essentially identical with above-mentioned first embodiment work process, the difference between them It is：In the first embodiment, blocked and can not rotate by the bending 38 at back-up ring when pin 5 screw into back-up ring 34 position, make Motor 10 is in locked rotor condition；And in a second embodiment, when pin 5 screw into back-up ring 34 position, pin is in back-up ring and circle Between post spring, skid in back-up ring cervical region 39 position, and motor 10 will not be in locked rotor condition.

Because selected micromotor can be in locked rotor condition the short time, do not interfere with motor performance or motor is caused Infringement, therefore, is technically all feasible with both spring structures in practical application.No matter adopted which kind of structure, when opening Lock or after the process of locking terminates, is required for motor power-off.Generally electronically controlled locking device is all configured with similar position switch Element, detecting dead bolt or slide block or other part position change with tongue linked, signal is passed to the control of locking device Unit, stops motor operations in time.

Above-described embodiment is this utility model preferably implementation, and in addition, this utility model can also other side Formula is realized, and on the premise of conceiving without departing from the technical program, any obvious replacement is all in protection model of the present utility model Within enclosing.

Claims (10)

1. a kind of motor drive mechanism for locking device, including：One motor, fixation power transmission shaft on the motor, one Individual be enclosed within power transmission shaft and axially displaceable cylindrical spring, one be located on power transmission shaft can precession cylindrical spring two adjacent rings Between pin, one with motors setting body it is characterised in that：This body includes accommodating the cavity of cylindrical spring With the second chute being located in body, the two ends of described cylindrical spring are provided with and stretch out in the cylindrical back-up ring of cylindrical spring, described Back-up ring is located at the second chute to stop cylindrical spring from rotating.

2. the motor drive mechanism for locking device according to claim 1 it is characterised in that：Described second chute includes two Individual symmetrically arranged inclined-plane, described back-up ring includes two annulus being formed by two free ends of cylindrical spring, and two annulus are stretched For cylindrical spring two ends, the axis of annulus is vertical with cylindrical spring axis, and described inclined-plane is offseted with the anchor ring of back-up ring.

3. the motor drive mechanism for locking device according to claim 1 it is characterised in that：Described second chute includes two Individual symmetrically arranged inclined-plane, described back-up ring includes the cervical region being formed by two free ends of cylindrical spring and the circle being connected with cervical region Ring, two annulus stretch out in the two ends of cylindrical spring, the axis of annulus and the diameter parallel of cylindrical spring, described inclined-plane and back-up ring Cervical region offset.

4. the motor drive mechanism for locking device according to claim 1 it is characterised in that：Described body includes two edges The first half body of axisymmetrical setting of body and the second half body, described the first half body and the second half body combine rear shape The described cavity becoming, this cavity includes：Circular cylindrical cavity and the truncated cone cavity being symmetrically set in circular cylindrical cavity both sides, described Circular cylindrical cavity with diameter greater than pin around cylindrical spring axis radial rotary diameter, the axis of small circle of truncated cone cavity is big In the external diameter of cylindrical spring, the axis of great circle of truncated cone cavity is identical with circular cylindrical cavity diameter.

5. the motor drive mechanism for locking device according to claim 4 it is characterised in that：The end of described the first half body The end of portion or the second half body is provided with buckle, the end of the end of described the second half body or the first half body be provided with The grab that buckle matches, the first half body and the second half body are equipped with the riveting for riveting the first half body and the second half body Nail.

6. the motor drive mechanism for locking device according to claim 4 it is characterised in that：The first half body and the second half The corresponding faying face of body is symmetrically provided with depression, and this depression includes an inclined-plane, the first half body and the second half body knots After conjunction, depression forms the second chute.

7. the motor drive mechanism for locking device according to claim 6 it is characterised in that：Two of described second chute The angle on inclined-plane is 35 degree to 45 degree.

8. the motor drive mechanism for locking device according to claim 1-7 any one it is characterised in that：Also include with The bearing shell of pin cooperation, described power transmission shaft is provided with the bearing shell installing hole matching with bearing shell.

9. the motor drive mechanism for locking device according to claim 8 it is characterised in that：Described bearing shell is annular, Described pin includes two pins head to head arranging, and described pin has the head with diameter greater than bearing shell endoporus.

10. the motor drive mechanism for locking device according to claim 9 it is characterised in that：Also include one located at two Locating piece between individual pin head.