CN206220685U - A kind of motor drive mechanism for locking device - Google Patents

Abstract

The utility model is related to locking device, and more specifically to a kind of motor drive mechanism for locking device, it includes：One motor a, power transmission shaft for setting on the motor a, helical spring for being arranged at power transmission shaft also includes：One servo axis that can be axially displaced in helical spring, one be located on servo axis can precession helical spring pin, the servo axis put in helical spring and are slidably matched with the helical spring.Compared with prior art, servo axis of the present utility model remain the state to cylindrical spring radial constraint to the utility model in cylindrical spring rotates and is servo-actuated post axial displacement process, efficiently against the vibration problem that spring causes by rotation.

Description

A kind of motor drive mechanism for locking device

Technical field

The utility model is related to locking device, more specifically to for the electricity with electronically controlled locking device Motivation structure.

Background technology

It is existing with the universal locking mechanism driven using micro dc motor of electronically controlled locking device.Wherein One of technical scheme be using the helical spring being enclosed within rotating shaft and the pin being fixed in rotating shaft, by the rotary motion of motor The linear motion between spring and pin is converted into, and then pushes or pull on a barrier element to control dead bolt to withdraw.

For using the scheme of pin rotation, when pin is performed relative motion along spring coils, because spring receives pin Pressure and compress, thus produce larger friction, the friction produces the power for making spring be rotated with axle again, easily causes spring with axle Rotate and circular runout, prevent spring from stable axial displacement, not only cause the abrasion between spring and sliding block, can also produce Pin can not smoothly into the failure of spring helical trajectory.Additionally, the contact friction between pin and spring can cause pin and The abrasion of spring.Chinese utility model patent CN201110244325.0 discloses a kind of pin rotation forces spring axial direction position Move, and then promote the barrier element technical scheme stretching out and withdraw, and proposed for spring transfer shake and bounce and set The spring tertiary winding is put to absorb the vibration and impact that pin pin is produced to spring when buffering motor is started and turned to, spring is prevented Distortion or the technical measures of bounce.

Can also use to be fixed on helical spring on motor drive shaft and be rotated with motor, pin is fixed on into one can axle To the mode on the barrier element for sliding, can equally realize pushing or pull on barrier element stretch out in latched position or withdraw in Open position.Such as, applicant Schlage Lock Company obtain the United States Patent (USP) US5 for authorizing, and 628,216 disclose A kind of locking device, the locking device is located in door lock, including motor, the gear train being connected with motor, is connected with gear train The axis of guide, free end is fixed on the cylindrically coiled spring on the axis of guide, the helical spring can be partially inserted into one it is coaxial Line set plunger sleeve pipe in, pin is vertically inserted on plunger sleeve pipe, at the same from enter plunger sleeve pipe spring adjacent two Pass through in circle.Helical spring is driven to rotate with motor, pin precession in helical spring two adjacent rings makes plunger sleeve pipe along motor Axis is slided between latched position and open position, is achieved in locking and unlatching control to door lock.

The patent further discloses the locking device of another door lock, and the device is to be somebody's turn to do with the difference of above-mentioned technical proposal Pin is located on a framework for lockplate end bosses in scheme, and helical spring passes through from framework, and pin is inserted in spring phase Between two adjacent circles, the lockplate in the presence of spring and pin precession, between latched position and open position axially Displacement.

The technical scheme that above-mentioned patent is disclosed, its advantage is that because spring is fixed with power transmission shaft, rotary inertia is small, also not There are problems that spring transfer and circular runout.But place unsatisfactory is there is also, such as, due to load（Plunger sleeve pipe and Lockplate）Volume and weight is all larger, the position frictional force for making spring be contacted with pin during spring precession pin due to being stretched Increase, easily causes the abrasion of spring and pin.

Additionally, need one end to fix in some motor drive mechanisms, and the unfixed spring more long of the other end, in such case Under, can produce the whipping of disalignment and cause spring vibration when rotated due to no radial constraint compared with distal part from power transmission shaft It is dynamic.

As can be seen here, for " pin and helical spring interact, by the convert rotational motion of motor be helical spring with Linear motion between pin, and then a barrier element is pushed or pull on to control locking device " this technical theme, for For for the motor drive mechanism of locking device, also in the presence of further Improvement requirement.

The content of the invention

The purpose of this utility model is, there is provided one kind can prevent from causing spring vibration because of rotation, and reduce pin The motor drive mechanism for locking device of frictional force between spring.

Content of the present utility model includes：

A kind of motor drive mechanism for locking device, including：One motor, a power transmission shaft for setting on the motor, one The individual helical spring for being arranged at power transmission shaft, it is characterised in that：Also include：One axially displaced in helical spring can be servo-actuated Axle, one be located on servo axis can precession helical spring pin, the servo axis put in helical spring with the spiral bullet Spring is slidably matched.

Wherein, the helical spring is cylindrical spring, and the cylindrical spring includes precession portion and buffer part, and the pin exists Axial displacement in the range of precession portion.

Wherein, the pitch of the buffer part is zero, and the pitch in the precession portion is more than pin diameter.

Wherein, the servo axis external diameter and the unilateral gap of the cylindrical spring internal diameter are 0.15mm-0.30mm, the rotation The pitch for entering portion is 1.1-1.3 times of pin diameter.

Wherein, two free ends of the cylindrical spring are respectively equipped with the first retainer plate and the second retainer plate and first and consolidate Fixed the first connected U-bend of circle and the second U-bend being connected with the second retainer plate；The power transmission shaft is provided with ring rib, Ring rib includes the raised line head matched with the first U-bend, and the first U-bend is sheathed on raised line head, the first retainer plate dress In ring rib outside.

Wherein, the end of the servo axis is provided with the cylindroid for protruding from servo axis outer round surface.

Wherein, the power transmission shaft includes first shaft shoulder and second shaft shoulder, including between power transmission shaft and motor case Fixed mount, the fixed mount includes being fixed on two fix bars and the 3rd U perpendicular to fix bar of motor case bottom Shape is curved, and the 3rd U-bend is located between first shaft shoulder and second shaft shoulder to limit the axial displacement of power transmission shaft.

Wherein, the fixed mount is bent into a steel wire, and the 3rd U-bend diameter is less than first shaft shoulder and is more than Two shaft shoulders.

Wherein, the motor drive shaft is flat axle, and the power transmission shaft includes the flat axis hole matched with flat axle.

Wherein, the servo axis include column pin hole, and the pin includes the head between helical spring two adjacent rings With the afterbody for being fixed on column pin hole.

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

1. compared with prior art, servo axis of the present utility model rotate and are servo-actuated post axial displacement in cylindrical spring During remain state to cylindrical spring radial constraint, efficiently against the vibration problem that spring causes by rotation.

2. the structure that buffer part is set on cylindrical spring that the utility model is used, in pin post relative to cylinder bullet During spring axial displacement, buffer part is also stretched, and makes stretching and compression reduction that the precession portion of spring is subject to, can be effectively reduced post Frictional force between pin and spring, so as to reduce the abrasion of part.

3. part used by the technical solution of the utility model is few, simple structure, it is easy to processing and installation.

Brief description of the drawings

Fig. 1 is the dimensional structure diagram of the utility model embodiment.

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

Fig. 3 is the cylindrical spring dimensional structure diagram of the utility model embodiment.

Fig. 4 is the utility model embodiment power transmission shaft dimensional structure diagram.

Fig. 5 is the dimensional structure diagram at another visual angle of the utility model embodiment power transmission shaft.

Fig. 6 is the dimensional structure diagram of the servo axis of the utility model embodiment.

Fig. 7 is the assembling structure schematic diagram that is in the locked position in face equipment of driving lever of the utility model embodiment.

Fig. 8 is the assembling structure schematic diagram that is in the open position in face equipment of driving lever of the utility model embodiment.

Specific embodiment

In order to allow those skilled in the art to further appreciate that the utility model, below in conjunction with drawings and Examples pair The utility model is described in detail.

Figures 1 and 2 show that the utility model preferred embodiment structure, as depicted in figs. 1 and 2, motor drive mechanism includes Motor 10, power transmission shaft 30, cylindrical spring 20, servo axis 40, pin 60.Motor 10 is common direct current generator, power transmission shaft 30 with Motor drive shaft 11 coordinates transmitting torque using flat axle, and motor drive shaft 11 is fixed with the axis hole 35 of power transmission shaft using interference fit.Cylinder bullet Two free ends of spring 20 are arranged to and around first retainer plate 21 and the second retainer plate 22 of 1-2 circles, respectively with the first retainer plate 21 and the second retainer plate 22 connection be both direction negative shape and size identical the first U-bend 23 and the second U-bend 24.The ring rib 31 do not closed is provided with power transmission shaft 30, the ring rib 31 includes two raised line heads 32, one of them Raised line head and the first U-bend 23 are coincide, and the first U-bend 23 can just be embedded in a raised line head 32, the first retainer plate 21 The outside of raised line head 32 is enclosed within, the axial displacement of cylindrical spring 20 is limited by ring rib 31, and cylindrical spring 20 is relative to transmission The radial displacement of axle 30 is limited by the first U-bend 23 and raised line head 32.The mode that pin 60 is located on servo-actuated post 40 can be It is cylindrical that two pintle heads symmetrically stretch out in servo axis 40, it is also possible to unidirectional to stretch out a pintle head, using which kind of Mode depends on the object that motor drive mechanism drives, in the present embodiment, the utility model drive pair as if be located at servo-actuated post 40 Under a rotatable driving lever 50, therefore only need to pin 60 a pintle head 61 load driving lever 50 chute 55 It is interior, it is not necessary that two pintle heads are set.When 60 straight-line displacement of pin, pintle head 61 acts on chute 55, promotes and dials Bar 50 is rotated.The diameter of pin afterbody 62 is larger than the diameter of pintle head 61, and it uses interference fit with column pin hole 41, Therefore it is provided with annular knurl in the cylindrical of pin afterbody 62.When motor 10 drives cylindrical spring 20 to rotate, pin 60 is by chute 55 Limit, it is impossible to rotated with cylindrical spring 20, can only be along the axis direction displacement of cylindrical spring 20（Referring to Fig. 6 and Fig. 7）.

Fig. 3 shows the structure of cylindrical spring 20, it can be seen in figure 3 that cylindrical spring 20 can precession post including one section The buffer part 26 of the larger precession portion 25 of the pitch of pin 60 and one section of pitch close to zero, precession portion about 15-17 circles, pitch is pin 1.1-1.3 times of 60 diameter, buffer part 26 this section is tightly around 7-9 circles.Tightly around this section of role be buffering rotation Enter the thrust of the pin 60 suffered by portion 25, the thrust can stretch precession portion 25.Set tightly around buffer part 26 this section after, Power is stretched in precession portion 25 simultaneously, buffer part 26 is also stretched, equivalent to increased the number of coils that is stretched, identical The total amount of tension of spring it is constant under conditions of, spring often encloses suffered tensile force and reduces, and thus tensile force suffered by precession portion 25 reduces, And the tensile force for reducing precession portion 25 means that cylindrical spring 20 reduces with the frictional force of pin 60, such that it is able to reduce cylinder bullet The abrasion of spring 20 and pin 60.

Fig. 4, Fig. 5 and Fig. 6 respectively illustrate the structure of power transmission shaft 30 and servo axis 40.Power transmission shaft 30 is included near motor 10 First shaft shoulder 34, second shaft shoulder 37 adjacent with first shaft shoulder 34 axle journal 33 adjacent with second shaft shoulder 37 and the phase of axle journal 33 Adjacent ring rib 31 and the shaft extension 36 adjacent with ring rib 31.First retainer plate 21 of cylindrical spring 20 is enclosed within axle journal On 33, the first U-bend 23 is fastened on raised line head 32, tightly around buffer part 26 have several snares in shaft extension.Column pin hole 41 is located at Near one end of motor 10, after servo axis 40 load cylindrical spring 20, column pin hole 41 is placed exactly in precession portion 25 servo-actuated post 40 The position of the heart.

Be can see with reference to Fig. 7 and Fig. 8, the length of the length more than cylindrical spring 20 of servo axis 40, at servo axis 40 When position is slided into, it reaches buffer part 26 always, at servo axis 40 when position is skidded off, the half of precession portion 25 be still enclosed within On dynamic post 40, consequently, it is possible in the rotation of cylindrical spring 20 and the axial displacement process of servo axis 40, it is right that servo axis 40 are all maintained The radial constraint of cylindrical spring 20.The diameter of servo axis 40 is more smaller than circular diameter in cylindrical spring, the unilateral gap between them Not influence the axial sliding fit between them, the deviation produced when cylindrical spring can be rotated again is limited to less Degree is advisable.In the present embodiment, the unilateral clearance range is 0.15mm-0.30mm.

Servo axis 40 are provided with two cylindroids 42 of symmetrical protrusion with the end that locking device is slidably matched, with two ellipses The slide rail that post 42 coordinates is the upper slide rail 75 by being located on panel 1（Referring to Fig. 7）With the glidepath on base plate（Not shown in figure） Composition, upper slide rail 75 on two parallel rectangular strips be provided with two sections just accommodate cylindroid 42 depressions, glidepath be with The relative raised rectangular strip of two sections of depressions（Not shown in figure）, after panel 1 and base plate assembling, cylindroid 42 is located at upper slide rail 75 There is a gap that can keep being slidably matched and glidepath between, between cylindroid 42 and slide rail.Power transmission shaft 30 and servo-actuated Axle 40 can be made of metal material, it would however also be possible to employ other synthetic materials, in the present embodiment using nylon material, in order to Mitigate weight servo axis 40 and use hollow-core construction.

Fig. 7 and Fig. 8 show that the utility model is applied to a kind of embodiment of the face equipment for locking mechanical button, the face Panel assembly includes a panel 1 on case lid, a base plate matched with panel 1（Not shown in figure）, it is located on panel 1 A button 2, whether the lower section that driving lever 50 is located at the stroke of button 2 can be pressed with control button 2, electricity described in the utility model Motivation structure is located at the side of button 2.Driving lever 50 includes a wheel hub 51, and wheel hub 51 is provided with pivot 53, the pivot matched with pivot Axis hole（Not shown in figure）It is located between panel 1 and base plate, driving lever 50 can be rotated around pivot hole, and arm 54 is extended from wheel hub 51, Being provided with arm 54 can load the chute 55 of pintle head 61, and three the first teeth 56 and adjacent three are provided with wheel hub 51 One groove 57, being provided with the inner plane of button 2 can enter the first projection 17 of the first groove 57.When driving lever is in first angle, three One tooth 56 raised with three first 17 is relative, and now the downward stroke of button 2 is stopped by the first tooth 56 of driving lever 50, it is impossible to press Under；When driving lever 50 is shifted onto in second angle by pintle head 61, the first groove 57 raised with first 17 is relative, and button 2 is downward Stroke does not stop that the first projection 17 is put into the first groove 57 when button 2 is pressed.Due to having between pin 60 and pivot 53 There is the arm of force more long so that pin 60 just can promote driving lever 50 to rotate with the power of very little, realize conciliating the locking of button 2 Lock.First position switch 71 is also set on panel 1, the end of arm 54 can touch first position switch 71 in default angle, The present position of driving lever 50 is transferred to the control unit of locking device.

As shown in fig. 7, being now in latched position, the precession portion 25 of cylindrical spring and buffer part 26 are subject to certain simultaneously Stretching, the first tooth 56 on driving lever 50 offsets with the first projection 17 on button 2, stops that button 2 is pressed（In figure 6 and figure 7, The direction that button 2 is pressed is the direction from paper out）, after mandate of unlocking is obtained, motor 10 drives cylindrical spring 20 to rotate, Servo axis 40 are subject to the thrust produced by the precession cylindrical spring 20 of pin 60 axially to be slided to unlocked position from latched position, post Pin 60 acts on chute 55 and promotes driving lever 50 to turn over an angle, and the disengaging of the first tooth 56 of driving lever 50 offsets with the first projection 17, First groove 57 go to the first raised 17 relative positions, during this, left bit from the from coil to coil of pin 60 ground to cylindrical spring 20 Move, suffered tensile force is gradually reduced, at the same time, the end of arm 54 has touched first position switch 71（As shown in Figure 8）, now Button 2 is pressed, because without stop, button 2 just can open case lock after pressing.After pressing the external force revocation of button 2, back-moving spring （Not shown in figure）Button 2 is resetted.After button 2 resets, if the control unit for receiving locking device sends locking signal, motor 10 reversions, cylindrical spring 20 starts from coil to coil ground to the left side displacement of pin 60, while suffered tensile force gradually increases, until pin 60 Driving lever 3 is pushed back into latched position, untill recovering the stop to button 2.

In Fig. 1 Fig. 2, it can be seen that the structure of fixed mount 65, in order to prevent power transmission shaft 30 from motor drive shaft axial displacement or Depart from, cause operation troubles, it is slightly thick with one that fixed mount 65. fixed mount 65 is set between rotary shaft 30 and motor 10 Steel wire curve, the diameter of the 3rd U-bend 66 perpendicular to power transmission shaft 30 less than first shaft shoulder 34 and more than second shaft shoulder 37, its quilt The inner side of second shaft shoulder 37 is placed in, two symmetrical U-bends 66 of free end 67 and the 3rd of the 3rd U-bend 66 are at a right angle, form one Fix bar 67 is pressed under the shell of motor 10, after motor 10 is fixed by panel 1 and base plate, fixed mount 65 is fixed therewith. Under normal circumstances, the 3rd U-bend 66 is not contacted with second shaft shoulder 37 and power transmission shaft 40 other any parts, when power transmission shaft 30 occurs To the displacement in the direction of cylindrical spring 20, the U-bend is contacted with second shaft shoulder 37, prevents power transmission shaft 30 from continuing axial displacement.For can For the sake of leaning on, in the correspondence of panel 1 and the position of axle journal 33, there is provided raised 77 gear of a pair of L-shaped is in the inner side of the 3rd U-bend 66, when solid When determining frame 65 by being promoted to inner side, L-shaped projection 77 can play a part of supporting and mounting bracket 65.

Above-described embodiment is the utility model preferably embodiment, and in addition the utility model can be with other manner Realize, on the premise of technical solutions of the utility model design is not departed from, any other obvious replacement is in this practicality Within the scope of novel protected.

Claims (10)

1. a kind of motor drive mechanism for locking device, including：One motor, a power transmission shaft for setting on the motor, one It is arranged at the helical spring of power transmission shaft, it is characterised in that：Also include：One axially displaced in helical spring can be servo-actuated Axle, one be located on servo axis can precession helical spring pin, the servo axis put in helical spring with the spiral bullet Spring is slidably matched.

2. the motor drive mechanism for locking device according to claim 1, it is characterised in that：The helical spring is cylinder Spring, the cylindrical spring includes precession portion and buffer part, pin axial displacement in the range of precession portion.

3. the motor drive mechanism for locking device according to claim 2, it is characterised in that：The pitch of the buffer part is Zero, the pitch in the precession portion is more than pin diameter.

4. the motor drive mechanism for locking device according to claim 3, it is characterised in that：The servo axis external diameter and institute The unilateral gap of cylindrical spring internal diameter is stated for 0.15mm-0.30mm, the pitch in the precession portion is the 1.1-1.3 of pin diameter Times.

5. the motor drive mechanism for locking device according to claim 2, it is characterised in that：Two of the cylindrical spring Free end is respectively equipped with the first U-bend that the first retainer plate and the second retainer plate be connected with the first retainer plate and solid with second The second connected U-bend of fixed circle；The power transmission shaft is provided with ring rib, and ring rib includes what is matched with the first U-bend Raised line head, the first U-bend is sheathed on raised line head, and the first retainer plate is loaded on ring rib outside.

6. the motor drive mechanism for locking device according to claim 1, it is characterised in that：The end of the servo axis sets It is equipped with the cylindroid for protruding from servo axis outer round surface.

7. the motor drive mechanism for locking device according to claim 1, it is characterized in that：The power transmission shaft includes first axle Shoulder and second shaft shoulder, including the fixed mount between power transmission shaft and motor case, the fixed mount include being fixed on outside motor Two fix bars and the 3rd U-bend perpendicular to fix bar of shell bottom, the 3rd U-bend are located at first shaft shoulder and the Limiting the axial displacement of power transmission shaft between two shaft shoulders.

8. the motor drive mechanism for locking device according to claim 7, it is characterized in that：The fixed mount is with a steel Silk is bent into, and the 3rd U-bend diameter is less than first shaft shoulder and is more than second shaft shoulder.

9. the motor drive mechanism for locking device according to claim 1, it is characterised in that：The motor drive shaft is flat axle, The power transmission shaft includes the flat axis hole matched with flat axle.

10. the motor drive mechanism for locking device according to claim 1-9 any one, it is characterised in that：It is described with Moving axis includes column pin hole, and the pin includes the head and the tail for being fixed on column pin hole between helical spring two adjacent rings Portion.