CN211524425U - Gear driving device of intelligent door lock - Google Patents

Abstract

The utility model discloses a gear drive of intelligence lock, including casing and motor, output wheel subassembly, the drive wheel subassembly of setting in the casing. The shell comprises a lower shell and an upper shell which are buckled with each other; the output wheel assembly and the driving wheel assembly are rotatably arranged between the upper shell and the lower shell. The output wheel assembly comprises a bolt driving wheel and a connecting wheel which is coaxially arranged with the bolt driving wheel; the motor drives the connecting wheel to rotate through the transmission wheel component. An output port opposite to the position of the bolt driving wheel is arranged on the lower shell. A worm for driving the driving wheel assembly to rotate is arranged on a rotating shaft of the motor; one end of the worm, which is far away from the motor, is provided with an arc-shaped end; the worm and the transmission wheel component are made of plastics. Compared with the prior art, the utility model discloses can effectual reduction worm rotate the frictional resistance that the in-process received, the effectual transmission efficiency that has improved and reduced the noise that produces in the drive process simultaneously.

Description

Gear driving device of intelligent door lock

Technical Field

The utility model relates to an intelligence lock technical field, especially a gear drive of intelligence lock.

Background

The electronic intelligent door lock can realize automatic unlocking, and a gear driving device of the intelligent door lock is a key component of the electronic intelligent door lock. The gear driving device generally comprises a motor, a driving wheel assembly and an output wheel assembly engaged with the lock tongue, wherein the motor drives the lock tongue to move through the driving wheel assembly.

In the prior art, the meshing between the motor and the transmission wheel assembly is usually driven by a worm, an output shaft of the motor is connected with the worm, and the worm is meshed with helical teeth of the transmission wheel assembly. The motor can produce the axial force that extends along the axial direction of worm at the drive worm transmission in-process, and this axial force can increase the frictional force between worm terminal surface and the corresponding holding surface, not only increases the friction torque of worm, causes the reduction of transmission efficiency, has also increased the noise in the transmission process moreover.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a gear drive of intelligence lock to solve not enough among the prior art, it can effectual reduction worm rotate the frictional resistance that the in-process received, improved transmission efficiency and reduced the noise that produces in the driving process simultaneously.

The utility model provides a gear driving device of an intelligent door lock, which comprises a shell, and a motor, an output wheel component and a transmission wheel component which are arranged in the shell; the shell comprises a lower shell and an upper shell which are buckled with each other; the output wheel assembly and the driving wheel assembly are rotatably arranged between the upper shell and the lower shell;

the output wheel assembly comprises a bolt driving wheel and a connecting wheel which is coaxially arranged with the bolt driving wheel; the motor drives the connecting wheel to rotate through the driving wheel assembly;

an output port opposite to the position of the bolt driving wheel is arranged on the lower shell; a worm for driving the driving wheel assembly to rotate is arranged on a rotating shaft of the motor;

one end of the worm, which is far away from the motor, is provided with an arc-shaped end; the shell is provided with an axial limiting groove matched with the arc-shaped end; the worm and the transmission wheel component are made of plastics.

As a further improvement of the utility model, the lead angle of the worm is in the range of 20-30 degrees.

As a further improvement of the utility model, a motor positioning groove and an output wheel assembly positioning groove for mounting the motor are arranged on the lower shell;

the output wheel assembly is rotatably arranged in the output wheel assembly positioning groove, and the bolt driving wheel is positioned between the connecting wheel and the lower shell;

an arc-shaped concave part corresponding to the position of the bolt driving wheel is formed on the lower shell, and the output port is formed in the side wall of the arc-shaped concave part.

As a further improvement of the present invention, the driving wheel assembly comprises a primary gear assembly and a secondary gear assembly, wherein the primary gear assembly is provided with a helical gear engaged with the worm and a first gear coaxially arranged with the helical gear;

and a second gear meshed with the first gear and a third gear coaxially arranged with the second gear are arranged on the secondary gear assembly, and the third gear is meshed with the connecting wheel.

As a further improvement of the present invention, the diameter of the helical gear is larger than the diameter of the first gear;

the diameter of the second gear is larger than the diameter of the third gear.

As a further improvement, the material of fifth wheel is plastics, the material of spring bolt drive wheel is the metal, the fifth wheel is inlayed and is moulded plastics on the spring bolt drive wheel.

As a further improvement, the spring bolt driving wheel is provided with a plurality of locating holes, be provided with on the fifth wheel with locating hole interference fit's reference column.

As a further improvement of the present invention, the output wheel assembly further comprises a rotating shaft, and two ends of the rotating shaft are respectively fixed on the upper housing and the lower housing;

the connecting wheel and the bolt driving wheel are respectively matched with the rotating shaft in a rotating way.

As a further improvement of the present invention, the output wheel assembly further comprises a rotating shaft, and the connecting wheel, the spring bolt driving wheel and the rotating shaft are in clearance fit;

the lower shell is provided with an annular bulge part for supporting the bolt driving wheel;

and a limiting groove for positioning the rotating shaft is arranged at the central position of the annular bulge.

As a further improvement of the present invention, the output wheel assembly further includes a rotating shaft, the connecting wheel and the spring bolt driving wheel are fixed respectively in the rotating shaft, the two ends of the rotating shaft are respectively rotatably installed on the upper casing and the lower casing.

Compared with the prior art, the embodiment of the utility model provides a through designing the end of worm for the arc end, reduced the area of contact between the axial stop part of worm terminal surface and support worm end to can reduce the friction torque that the worm terminal surface formed, not only improve the transmission efficiency among the transmission process, and reduce the friction noise that produces among the transmission process. Simultaneously, the worm and the transmission assembly are designed into plastic structures, so that the production and assembly cost is saved and the noise generated in the transmission process is reduced compared with the steel structure adopted in the prior art.

Drawings

Fig. 1 is a perspective view of a gear driving device of an intelligent door lock disclosed in an embodiment of the present invention;

fig. 2 is a schematic view of a first internal structure of a gear driving device of an intelligent door lock disclosed in an embodiment of the present invention;

fig. 3 is a schematic view of a second internal structure of the gear driving device of the intelligent door lock disclosed in the embodiment of the present invention;

fig. 4 is a first structural schematic diagram of a lower housing of a gear driving device of an intelligent door lock disclosed in an embodiment of the present invention;

fig. 5 is a second schematic structural diagram of a lower housing in the gear driving device of the intelligent door lock disclosed in the embodiment of the present invention;

fig. 6 is a front view of a lower housing in the gear driving device of the intelligent door lock disclosed in the embodiment of the present invention;

fig. 7 is a schematic view of an installation structure of a worm and a primary gear assembly in the gear driving device of the intelligent door lock disclosed in the embodiment of the present invention;

fig. 8 is a schematic structural diagram of a secondary gear assembly in the gear driving device of the intelligent door lock disclosed in the embodiment of the present invention;

fig. 9 is a schematic structural diagram of an output wheel assembly in the gear driving device of the intelligent door lock disclosed in the embodiment of the present invention;

FIG. 10 is a schematic illustration of the output wheel assembly of FIG. 9 after installation;

FIG. 11 is an enlarged view of a portion of coating 10;

fig. 12 is a schematic structural diagram of an output wheel assembly in a gear driving device of an intelligent door lock according to another embodiment of the present invention;

FIG. 13 is a schematic view of the output wheel assembly of FIG. 12 with bearings mounted on the shaft;

FIG. 14 is a schematic illustration of the output wheel assembly of FIG. 12 after installation;

fig. 15 is a partial enlarged view of fig. 14;

fig. 16 is a schematic structural diagram of a special-shaped positioning hole of a worm in a gear driving device of an intelligent door lock disclosed in an embodiment of the present invention;

description of reference numerals: 1-shell, 11-output port, 12-arc depressed part, 13-axial limit groove, 14-lower shell, 141-motor positioning groove, 142-output wheel component positioning groove, 143-limit groove, 144-annular convex part, 145-transmission component positioning groove, 1451-first positioning groove, 1452-second positioning groove, 15-upper shell, 151-rotating shaft limit groove,

2-the motor is driven by the motor,

3-output wheel assembly, 31-bolt driving wheel, 311-positioning hole, 32-connecting wheel, 321-positioning column, 33-rotating shaft, 331-first bearing, 332-second bearing,

4-drive wheel component, 41-first-stage gear component, 411-helical gear, 412-first gear, 413-first rotating shaft, 42-second-stage gear component, 421-second gear, 422-third gear, 423-second rotating shaft,

5-worm, 50-special-shaped positioning hole and 51-arc end.

Detailed Description

The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

The embodiment of the utility model provides a: as shown in fig. 1-13, a gear driving device for an intelligent door lock is disclosed, which comprises a housing 1, wherein a space is provided in the housing 1 for installing and fixing a motor 2, an output wheel assembly 3 and a transmission wheel assembly 4, the housing 1 comprises a lower housing 14 and an upper housing 15 which are mutually buckled, and both the output wheel assembly 3 and the transmission wheel assembly 4 are rotatably installed between the lower housing 14 and the upper housing 15. The output wheel assembly 3 includes a tongue driving wheel 31 and a coupling wheel 32 coaxially disposed with the tongue driving wheel 31. Deadbolt drive wheel 31 is disposed between fifth wheel 32 and lower housing 14. The motor 2 drives the connecting wheel 32 to rotate through the transmission wheel assembly 4, and the connecting wheel 32 drives the bolt driving wheel 31 to rotate.

As shown in fig. 1, 4 and 5, an output port 11 is provided on the housing 1, and the latch bolt driving wheel 31 is exposed from the output port 11 to the outside of the housing 1. A latch driving wheel 31 is exposed to the outside of the housing 1 through the output port 11 to be conveniently engaged with a driving member fixed to the latch to effect movement of the driving latch.

The housing 1 includes a lower housing 14 and an upper housing 15 which are fastened to each other. In order to further ensure the firmness of the installation between the upper shell 15 and the lower shell 14, the upper shell 15 and the lower shell 14 are fixed through screw connection.

As shown in fig. 4 to 6, the lower case 14 is provided with a motor positioning groove 141 for mounting the motor 2 and an output wheel assembly positioning groove 142. The output wheel assembly positioning groove 142 is disposed at a position far from the motor positioning groove 141, and a transmission assembly positioning groove 145 is further disposed between the output wheel assembly positioning groove 142 and the motor positioning groove 141. As shown in fig. 3, the transmission assembly 4 is provided with two primary gear assemblies 41 and two secondary gear assemblies 42, respectively, and accordingly, the transmission assembly positioning groove 145 includes a first positioning groove 1451 for installing and positioning the primary gear assembly 41 and a second positioning groove 1452 for installing and positioning the secondary gear assembly 42. The first positioning groove 1451 is disposed at a position close to the motor positioning groove 141.

As shown in fig. 3 to 5, an arc-shaped recess 12 is disposed on an outer side wall of the lower housing 14 at a position opposite to the output wheel assembly positioning groove 142, the arc-shaped recess 12 is concave toward the direction in which the output wheel assembly positioning groove 142 is located, and the output port 11 is disposed on a side wall of the arc-shaped recess 12. The position of bolt drive wheel 31 and delivery outlet 11 is relative, and the width of delivery outlet 11 and the width looks adaptation of bolt drive wheel 31, and the width of delivery outlet 11 slightly is greater than the width of bolt drive wheel 31. Set up arc depressed part 12 and can be favorable to being connected fixedly of spring bolt drive wheel 31 and the driving piece on the spring bolt, compare in the design in the outside that spring bolt drive wheel 31 stretches out casing 1 among the prior art, its structural compacter is favorable to drive arrangement's the design that integrates. The width of the output port 11 is designed to be slightly larger than the width of the bolt driving wheel 31, so that the size of the opening of the output port 11 can be effectively reduced, and the interior of the shell 1 is favorable for dust prevention.

Further, the arc-shaped recess 12 is provided on a side of the lower case 14 away from the upper case 15. In the above structure, the arc-shaped recess 12 is formed at the bottom end of the lower housing 14, and the output port 11 is partially disposed at the bottom of the output wheel assembly positioning groove 142. The design of above-mentioned structure can be further the fixed mode of connection of optimization gear drive, can conveniently realize the cooperation of spring bolt drive wheel 31 and the driving piece on the spring bolt.

As shown in fig. 2-3, in this embodiment, a worm 5 is disposed on an output shaft of the motor 2, the worm 5 drives a transmission wheel assembly 4, and the worm 5 is fixedly connected with the output shaft of the motor 2 through a sliding key. Specifically, as shown in fig. 16, a specially-shaped positioning hole 50 is formed in the worm 5, a connecting portion adapted to the specially-shaped positioning hole 50 is formed in a position of the output shaft of the motor 2, which is opposite to the worm 5, and the output shaft and the specially-shaped positioning hole 50 are in clearance fit, so that the worm 5 can move along the axial direction of the output shaft through the clearance fit.

In the embodiment, the special-shaped positioning hole 50 is a semicircular positioning hole or a cross-shaped positioning hole or a straight-line-shaped positioning hole, and the special-shaped positioning hole 50 and the connecting part are connected to effectively avoid relative rotation between the output shaft and the worm 5 in the circumferential rotation process through matching of the special-shaped positioning hole 50 and the connecting part. The design of the structure enables the motor to only transmit the force for driving the worm 5 to rotate in the circumferential direction in the process of driving the worm 5 to rotate. The force generated axially by the worm 5 during the driving of the worm 5 is not transmitted to the rotor inside the motor 2 through the output shaft, thereby influencing the use of the rotor.

The motor 2 is driven by the worm 5, and therefore, a helical gear 411 engaged with the worm 5 is provided on the transmission wheel assembly 4. This application is applicable to the gear drive device of intelligence lock, consequently needs the two-way rotation of motor, and two-way rotation in-process makes the two-way rotation of worm 5 control drive wheel subassembly 4 and then drives the back-and-forth movement of spring bolt in order to realize locking the door or unblank. In order to better realize the bidirectional rotation of the helical gear 411 driven by the worm 5, the lead angle of the worm 5 is designed to be 20-30 degrees in the embodiment of the present invention. ,

in the process of driving the worm 5 to rotate by the motor 2, the worm 5 generates a driving force along the axial direction thereof, and in order to avoid the large position of the worm 5 generated under the action of the driving force, as shown in fig. 2, an axial limiting groove 13 matched with the end of the worm 5 is further arranged on the lower shell 15, the side wall of the axial limiting groove 13 supports the radial direction of the worm 5, and meanwhile, the driving force generated in the rotating process of the worm 5 drives the worm 5 to abut against the groove bottom of the axial limiting groove 13, so that the axial limiting groove 13 supports and limits the worm 5 axially. The arrangement of the axial limiting groove 13 can effectively reduce the swinging condition of the worm 5 in the rotating process.

Specifically, the driving force generated by the worm 5 during the rotation may move the worm 5 in a direction away from the motor 2, or the driving force may move the worm 5 in a direction close to the motor 2. When the driving force makes the worm 5 move towards the direction close to the motor 2, the worm 5 can push the output shaft of the motor 2 to be abutted against the base of the motor, and the output shaft can rub against the worm 5 in the rotating process after the abutment, so that the transmission efficiency is influenced. However, because the end of the output shaft of the motor 2 is generally designed to be a circular arc end, friction generated by small contact area of the output shaft and the base of the motor in the rotating process is small. However, when drive power makes worm 5 produce the trend to keeping away from the direction removal of motor 2, worm 5 can support the tank bottom position at axial spacing groove 13, makes worm 5 produce frictional force at the rotation in-process, as shown in fig. 7, the embodiment of the utility model provides a keep away from on the worm 5 motor 2's one end sets up to arc end 51, makes arc end 51 and the tank bottom frictional contact of axial spacing groove 13, because the area of contact between the design of arc end 51 makes worm 5 and the tank bottom of axial spacing groove 13 little to be favorable to reducing the frictional force that rotates the in-process and produce. By the design of the structure, the friction force applied to the worm 5 in the rotating process can be reduced no matter the worm rotates in the forward direction or in the reverse direction, so that the transmission efficiency is improved.

As shown in fig. 3, in the embodiment of the present invention, the primary gear assembly 41 is disposed away from the output wheel assembly 3, the primary gear assembly 41 is used for being connected to the worm 5, the secondary gear assembly 42 is disposed between the primary gear assembly 41 and the output wheel assembly 3, and the primary gear assembly 41 is connected to the output wheel assembly 3 through the secondary gear assembly 42.

As shown in fig. 7, the helical gear 411 is disposed on the primary gear assembly 41, and a first gear 412 disposed coaxially with the helical gear 411 is further disposed on the primary gear assembly 41, in this embodiment, the helical gear 411 and the first gear 412 are designed to be integrally formed. The helical gear 411 and the first gear 412 are both fixed on a first rotating shaft 413, and both ends of the first rotating shaft 413 are respectively rotatably mounted on the upper casing 15 and the lower casing 14 through respective corresponding bearings. Of course, a first rotation groove which is in clearance fit with the first end of the first rotation shaft 413 may be provided on the upper housing 15, and a second rotation groove which is in clearance fit with the second end of the first rotation shaft 413 may be provided on the lower housing 14, and the clearance fit enables the rotation shaft to rotate in the rotation groove.

As shown in fig. 8, the two-stage gear assembly 42 is provided with a second gear 421 engaged with the first gear 412, a third gear 422 coaxially provided with the second gear 421, and a second rotating shaft 423. The second gear 421 and the third gear 422 are fixed on the second rotating shaft 423, and two ends of the second rotating shaft 423 are rotatably mounted on the upper housing 15 and the lower housing 14 through respective corresponding bearings. In this embodiment, the third gear 422 and the second gear 421 are integrally molded.

As shown in fig. 9, the output wheel assembly 3 further includes a rotating shaft 33, the driving latch wheel 31 and the connecting wheel 32 are respectively rotatably engaged with the rotating shaft 33, and both ends of the rotating shaft 33 are respectively fixed to the upper housing 15 and the lower housing 14.

The gear material of the gear drive device of the door lock among the prior art is the metal material, and the noise that the metal material produced in transmission process is great, consequently the embodiment of the utility model provides a noise that produces in order to reduce transmission process has been optimized to the material of gear. Specifically, the worm 5, the helical gear 411, the first gear 412, the second gear 421 and the connecting wheel 32 are all made of plastic. Adopt plastics material can effectual noise reduction in gear drive process. Since the driving wheel 31 is used for driving the movement of the latch, the requirement on the strength of the driving wheel 31 is high, and the driving wheel 31 is made of metal in this embodiment. The connecting wheel 32 is insert molded on the tongue driving wheel 31. The fixed connecting wheel 32 and the bolt driving wheel 31 are installed in an insert injection molding mode, so that the installation stability of the fixed connecting wheel and the bolt driving wheel is improved.

In order to improve the transmission efficiency, a two-stage transmission assembly of a one-stage gear assembly 41 and a two-stage gear assembly 42 is provided, and the diameter of the helical gear 411 is set to be larger than that of the first gear 412; the diameter of the second gear 421 is made larger than that of the third gear 422. The arrangement of the structure can effectively amplify the transmission of the torque of the gear assembly in the transmission process.

As shown in fig. 6 and 11, the connecting wheel 32 and the bolt driving wheel 31 are in clearance fit with the rotating shaft 33, respectively. An annular protrusion 144 for supporting the latch bolt driving wheel 31 is provided on the bottom of the output wheel assembly positioning groove 142. The annular raised portion 144 supports the deadbolt driving wheel 31 such that the contact area between the deadbolt driving wheel 31 and the bottom of the output wheel assembly positioning slot 142 during rotation is small, thereby effectively reducing friction and improving transmission efficiency.

As shown in fig. 6 and 11, a limiting groove 143 for positioning the rotating shaft 33 is disposed at a center of the annular protrusion 144. One end of the rotation shaft 33 is positioned in the stopper groove 143, and the other end of the rotation shaft 33 is positioned on the upper case 15. The arrangement of the above structure causes the gear to rotate around the rotating shaft 33, while the rotating shaft 33 is fixed. In this embodiment, the rotating shaft 33 and the connecting wheel 32 and the driving tongue wheel 31 thereon are rotatably engaged with each other through a gap, and in another embodiment, the connecting wheel 32 and the driving tongue wheel 31 may be further fixed on the rotating shaft 33 through a bearing to rotatably engage with the rotating shaft 33.

Of course, another way can be provided, namely the rotating shaft 33 drives the gear thereon to rotate together, the specific connecting wheel 32 and the bolt driving wheel 31 are both fixed on the rotating shaft 33, and both ends of the rotating shaft 33 are respectively fixed on the upper shell 15 and the lower shell 14 through respective corresponding bearings.

In the above embodiment, the connecting wheel 32 is fixed on the driving wheel 31 by insert injection molding, and the two are connected and fixed into a whole by insert injection molding. In another embodiment, as shown in fig. 12-15, the fifth wheel 32 and the deadbolt drive wheel 31 are of a split design, and the fifth wheel 32 is removably attached to the deadbolt drive wheel 31.

Specifically, as shown in fig. 12, the driving wheel 31 for locking bolt is provided with a plurality of positioning holes 311, and the connecting wheel 32 is provided with positioning posts 321 in interference fit with the positioning holes 311. The driving wheel 31 is fixed to the connecting wheel 32 through the matching of the positioning hole 311 and the positioning post 321. The number of the positioning posts 321 is at least two, and the positioning posts 321 are provided to prevent the bolt driving wheel 31 and the connecting wheel 32 from rotating relative to each other in the circumferential direction. Specifically, the three positioning columns 321 are provided, and the three positioning columns 321 are annularly arranged on the connecting wheel 32. Three positioning holes 311 are also provided in the corresponding latch bolt driving wheel 31.

As shown in fig. 13 to 15, in this embodiment, the connecting wheel 32 and the bolt driving wheel 31 are fixed to a rotating shaft 33, and both ends of the rotating shaft 33 are rotatably mounted on the upper housing 15 and the lower housing 14, respectively. A first bearing 331 and a second bearing 332 are respectively arranged at two ends of the rotating shaft 33, an inner ring of the first bearing 331 is in interference fit with a first end of the rotating shaft 33, and the first bearing 331 is in interference fit with the limiting groove 143 on the lower shell 14. The inner ring of the second bearing 332 is in interference fit with the second end of the rotating shaft 33, and the outer ring of the second bearing 332 is in interference fit with the rotating shaft limiting groove 151 on the upper shell 15.

The structure, features and effects of the present invention have been described in detail above according to the embodiment shown in the drawings, and the above description is only the preferred embodiment of the present invention, but the present invention is not limited to the implementation scope shown in the drawings, and all changes made according to the idea of the present invention or equivalent embodiments modified to the same changes should be considered within the protection scope of the present invention when not exceeding the spirit covered by the description and drawings.

Claims (10)

1. A gear driving device of an intelligent door lock comprises a shell, and a motor, an output wheel assembly and a transmission wheel assembly which are arranged in the shell; the shell comprises a lower shell and an upper shell which are buckled with each other; the output wheel assembly and the driving wheel assembly are rotatably arranged between the upper shell and the lower shell;

the output wheel assembly comprises a bolt driving wheel and a connecting wheel which is coaxially arranged with the bolt driving wheel; the motor drives the connecting wheel to rotate through the driving wheel assembly;

an output port opposite to the position of the bolt driving wheel is arranged on the lower shell; a worm for driving the driving wheel assembly to rotate is arranged on a rotating shaft of the motor;

the method is characterized in that: one end of the worm, which is far away from the motor, is provided with an arc-shaped end; the shell is provided with an axial limiting groove matched with the arc-shaped end; the worm and the transmission wheel component are made of plastics.

2. The gear driving device for intelligent door lock according to claim 1, wherein the lead angle of the worm is in the range of 20-30 °.

3. The gear driving device of an intelligent door lock according to claim 1, wherein a motor positioning groove and an output wheel assembly positioning groove for mounting the motor are provided on the lower case;

the output wheel assembly is rotatably arranged in the output wheel assembly positioning groove, and the bolt driving wheel is positioned between the connecting wheel and the lower shell;

an arc-shaped concave part corresponding to the position of the bolt driving wheel is formed on the lower shell, and the output port is formed in the side wall of the arc-shaped concave part.

4. The gear driving device of an intelligent door lock according to claim 1, wherein the transmission wheel assembly comprises a primary gear assembly and a secondary gear assembly, the primary gear assembly is provided with a helical gear engaged with the worm and a first gear coaxially arranged with the helical gear;

and a second gear meshed with the first gear and a third gear coaxially arranged with the second gear are arranged on the secondary gear assembly, and the third gear is meshed with the connecting wheel.

5. The gear driving apparatus of an intelligent door lock according to claim 4, wherein the diameter of the helical gear is larger than that of the first gear;

the diameter of the second gear is larger than the diameter of the third gear.

6. The gear driving device of an intelligent door lock according to claim 1, wherein the connecting wheel is made of plastic, the bolt driving wheel is made of metal, and the connecting wheel is embedded and injection-molded on the bolt driving wheel.

7. The gear driving device of an intelligent door lock according to claim 1, wherein the bolt driving wheel is provided with a plurality of positioning holes, and the connecting wheel is provided with positioning columns in interference fit with the positioning holes.

8. The gear driving device of an intelligent door lock according to claim 1, wherein the output wheel assembly further comprises a rotating shaft, and two ends of the rotating shaft are respectively fixed on the upper shell and the lower shell;

the connecting wheel and the bolt driving wheel are respectively matched with the rotating shaft in a rotating way.

9. The gear driving device of the intelligent door lock according to claim 1, wherein the output wheel assembly further comprises a rotating shaft, and the connecting wheel and the bolt driving wheel are in clearance fit with the rotating shaft;

the lower shell is provided with an annular bulge part for supporting the bolt driving wheel;

and a limiting groove for positioning the rotating shaft is arranged at the central position of the annular bulge.

10. The gear driving device of an intelligent door lock according to claim 1, wherein the output wheel assembly further comprises a rotating shaft, the connecting wheel and the bolt driving wheel are respectively fixed on the rotating shaft, and two ends of the rotating shaft are respectively rotatably mounted on the upper shell and the lower shell.

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