CN112554652A

CN112554652A - Gear transmission mechanism and intelligent door lock

Info

Publication number: CN112554652A
Application number: CN202011589385.1A
Authority: CN
Inventors: 任克要
Original assignee: Shenzhen Jingdian Intelligent Technology Co Ltd
Current assignee: Shenzhen Jingdian Intelligent Technology Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-03-26

Abstract

The invention discloses a gear transmission mechanism and an intelligent door lock, comprising: the power device comprises an output end and a first gear, and the first gear is fixed on the output end; the speed reducing device comprises an outer shell, an end cover, a gear structure and a first sensing element; the end cover is fixedly connected with the outer shell to form an accommodating cavity; the gear structure is arranged in the cavity, and the first sensing element is fixed on the gear structure; the gear structure is meshed with the first gear; a master control PCBA component; and a drive detection PCBA assembly comprising a sensor adapted to the first inductive element; the transmission detects the PCBA subassembly and fixes inside the end cover, and with main control PCBA subassembly communication connection. The gear transmission mechanism is reasonable in spatial layout and high in mechanical transmission replacement efficiency.

Description

Gear transmission mechanism and intelligent door lock

Technical Field

The invention relates to the technical field of intelligent door locks, in particular to a gear transmission mechanism and an intelligent door lock.

Background

The supporting gear drive of current intelligent lock product constructs: the universal door lock is mainly characterized in that a common standard reduction gearbox and a motor on the market are selected and used in a matched mode, the influence of factors such as the height deviation of the power supply voltage of the door lock, the space layout and the structure clearance is influenced, accurate stroke management and control are difficult to achieve at the output end of a transmission mechanism, the compensation modes such as increasing the movement idle stroke clearance and increasing time driving can be used for making up, and the poor results such as low transmission efficiency, high noise and high power consumption are easily generated to a certain extent.

Therefore, the prior art is still in need of further improvement.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide a gear transmission mechanism and an intelligent door lock, and aims to solve the problem that the output end of the gear transmission mechanism used with the existing intelligent door lock is difficult to realize accurate stroke control.

In a first aspect, the present invention provides a gear transmission mechanism, comprising:

the power device comprises an output end and a first gear, and the first gear is fixed on the output end;

the speed reducing device comprises an outer shell, an end cover, a gear structure and a first sensing element;

the end cover is fixedly connected with the outer shell to form an accommodating cavity; the gear structure is arranged in the cavity, and the first sensing element is fixed on the gear structure; the gear structure is meshed with the first gear;

a master control PCBA component; and

a drive detection PCBA assembly including a sensor adapted to the first inductive element; the transmission detects the PCBA subassembly and fixes inside the end cover, and with main control PCBA subassembly communication connection.

Optionally, the gear transmission mechanism, wherein the inner wall of the outer casing is provided with teeth, the gear structure includes:

a planetary gear set including a planetary gear, the planetary gear meshing with the teeth; and

the transmission frame comprises a body, a first fixing part and a second gear with an output shaft; the first fixing part and the second gear are respectively fixed on two end faces of the body; the planetary gear is rotatably fixed to the first fixing portion.

Optionally, the gear transmission mechanism further includes:

the bottom plate is arranged between the outer shell and the end cover and is respectively and fixedly connected with the outer shell and the end cover;

a clutch gear engaged with the second gear; and

a third gear engaged with the clutch gear;

the third gear and the clutch gear are arranged between the bottom plate and the end cover.

Optionally, the gear transmission mechanism further includes:

a first rotating piece and a second rotating piece, wherein the clutch gear is clamped between the first rotating piece and the second rotating piece; when driven, the gear mechanism performs meshing rotary motion around the second gear;

the second sensing element is fixed on the clutch gear; and

the clutch detection PCBA component comprises an inductor matched with the second induction element; the separation and reunion detects PCBA subassembly and fixes the bottom plate orientation on decelerator's the side, and with master control PCBA subassembly communication connection.

Optionally, the gear transmission mechanism, wherein the clutch gear includes a first circular shaft and a second circular shaft for fixing; the first rotating piece includes: a first through hole for the second gear to pass through and a joint part adapted to the first round shaft; the second rotating sheet comprises an engaging part matched with the second round shaft and a second through hole for the output shaft to pass through; the second sensing element is fixed on the first circular shaft, and when the second sensing element triggers the sensor to output a signal adaptive to the second sensing element, the master control PCBA component judges the signal, closes the power device, and enables the clutch gear to be separated from the third gear.

Optionally, the gear transmission mechanism further includes a planet carrier and a sun gear, the sun gear is fixed on the planet carrier, and the sun gear is meshed with the planet gear.

Optionally, the gear transmission mechanism, wherein the planet carrier includes a primary planet carrier and a secondary planet carrier; the planetary gear comprises a primary planetary gear, a secondary planetary gear and a tertiary planetary gear; the first-stage planetary gear is meshed with the first gear, a sun gear on the first-stage planet carrier is meshed with the second-stage planetary gear, and a sun gear on the second-stage planet carrier is meshed with the third-stage planetary gear.

Optionally, in the gear transmission mechanism, a cavity is formed in the bottom plate, and an arc end surface is formed in the cavity;

the end cover is provided with a raised rib position, and an arc end face is arranged on the raised rib position;

when the third gear and the clutch gear are meshed to rotate, the arc end surface of the first rotating sheet is superposed with the arc end surface of the bottom plate for limiting;

the arc end face of the second rotating sheet is overlapped with the arc end face of the protruding rib position of the end cover for limiting, so that the meshing transmission of the third gear and the clutch gear is effective.

Optionally, the gear train, wherein the master PCBA assembly comprises: the power device comprises a driving chip for driving the power device, a voltage stabilizing chip for controlling and inputting the voltage of the power device, a current control chip for controlling and inputting the current of the power device and an external port for outputting a connecting wire.

In a second aspect, an intelligent door lock comprises the gear transmission mechanism.

Drawings

FIG. 1 is a perspective view of a gear assembly according to an embodiment of the present invention;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

fig. 3 is an exploded view of a reduction gear according to an embodiment of the present invention;

fig. 4 is an exploded view from another perspective of the reduction gear according to the embodiment of the present invention;

FIG. 5 is a partial exploded view of another gear system provided in accordance with an embodiment of the present invention;

FIG. 6 is a perspective view of another gear system provided in accordance with an embodiment of the present invention;

FIG. 7a is an exploded view of the gear assembly shown in FIG. 6;

FIG. 7b is a schematic view of the bottom plate structure;

FIG. 7c is a schematic view of the end cap configuration;

FIG. 8 is a sectional view taken along line A-A of FIG. 6;

FIG. 9 is a sectional view taken along line C-C of FIG. 6;

FIG. 10 is a sectional view taken along line D-D of FIG. 6;

FIG. 11 is a schematic gear mesh diagram of a gear system according to an embodiment of the present invention;

fig. 12a and 12b are schematic diagrams illustrating a rotation deviation of the gear transmission mechanism according to the embodiment of the present invention.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The existing electronic anti-theft door lock needs to adopt a gear rotating mechanism to be matched with a motor, but the existing gear rotating device is difficult to realize accurate stroke management and control due to the layout and space factors when the power supply voltage of the intelligent door lock fluctuates.

Based on this, the present invention provides a solution to the above technical problem, and the details thereof will be explained in the following embodiments.

Referring to fig. 1 to 2, as shown in the drawings, an embodiment of the present invention provides a gear transmission mechanism, including: a power plant 10, a power plant mounting plate 30, a reduction gear 60, a master PCBA assembly 20, and a drive test PCBA assembly 72. The center hole of the power device fixing plate 30 is in interference fit with the shell positioning cylinder of the power device 10 and is fixed at the front end of the power device shell through a screw 33, and the speed reducer 60 is fixed on the power device fixing plate 30. The master PCBA assembly 20 may be fixed at the power unit end (opposite the power unit mounting plate 30) and the drive test PCBA assembly 72 fixed within the reduction unit 60. Through the running signal of decelerator that transmission detection PCBA obtained, main control master control PCBA subassembly can be controlled decelerator according to this signal to realize the stroke of accurate management and control gear drive's output.

In this embodiment, referring to fig. 7, a baffle 50 is further disposed between the device fixing plate 30 and the reduction gear 60, and the friction between the fixing plate and the reduction gear can be reduced by the baffle.

In this embodiment, the power device 10 includes an output end 11 and a first gear 40, and the first gear 40 is fixed on the output end 11; the reduction gear 60 includes: the outer shell 61, the end cover 80, the gear structure 62 and the first sensing element 57; the outer housing 61 and the end cap 80 may be fixed together by bolts 33. The power unit 10 and the outer casing 61 of the reduction gear unit 60 are fixed together by fixing bolts.

In this embodiment, referring to fig. 7, the power device includes a motor 12, a first gear (motor gear) 40 is sleeved on an output shaft 11 of the motor, and the motor gear 40 is in interference fit with the motor rotating shaft 11. Teeth 63 are arranged inside the outer shell 61; the gear structure 62 may be a three-stage planetary gear including a primary planetary gear 65, a secondary planetary gear 66, a tertiary planetary gear 67, a primary planet carrier 68, a secondary planet carrier 69, a sun gear 55, and a transmission carrier 87, wherein the planetary gears, planet carriers, and sun gear combine to form a planetary gear set. The planet gear is installed on the planet carrier through the installation fixed column fixed on the planet carrier, and the sun gear is fixed in the middle of the planet carrier, so that the planet gear and the sun gear on the same planet carrier are arranged in a different plane. The planetary gears are engaged with teeth on the inner wall of the outer shell 61 to form a complete three-stage planetary gear speed reducer.

In this embodiment, the transmission frame 87 includes a body 86, a first fixing portion 88 and the second gear 59 with an output shaft; the first fixing portion 88 and the second gear 59 are fixed to both end surfaces of the body 86, respectively; the third-stage planetary gear is rotatably fixed to the first fixing portion 88.

In this embodiment, the first inductive element 57 is fixed to the body of the turret for mating with a sensor on a drive sensing PCBA assembly 72. The first sensing element 57 may be a magnetic steel, and the corresponding sensor on the transmission detection PCBA assembly 72 is a magnetic control sensor. The transmission detection PCBA component is fixed inside the end cover. The motor gear rotates to drive the planetary gear to rotate and further drive the second gear to rotate, when the magnetic steel fixed on the transmission frame body is close to the magnetic control sensor on the transmission detection PCBA component, the signal is transmitted to the master control PCBA by the transmission detection PCBA component, and the rotary stroke of the output rotary shaft is controlled by the master control PCBA.

Furthermore, different numbers of sensors and magnetic steels can be arranged, and control of different rotating angles of the output rotating shaft can be realized on the main control PCBA by adopting a method of matching in a row.

In this embodiment, referring to fig. 7a, the main control PCBA assembly is soldered to the tail end of the motor through an electrical contact on the motor, and the main control PCBA assembly is provided with an external port for outputting an external connection line to receive an external command signal; the master control PCBA component realizes signal transmission with a clutch detection PCBA arranged in the end cover and a transmission detection PCBA arranged in the bottom plate 70 through communication connecting wires; the master control PCBA component is provided with a driving chip (not shown), a voltage stabilizing chip (not shown) and a current control chip (not shown), and reasonable and effective driving of a motor driving process is achieved.

In one implementation manner of this embodiment, with reference to fig. 7, the gear transmission mechanism further includes: the bottom plate 70 is arranged between the outer shell 61 and the end cover 80 and is fixedly connected with the outer shell 61 and the end cover 80 respectively; a clutch gear 17, the clutch gear 17 meshing with the second gear 59; and a third gear 90, the third gear 90 being engaged with the clutch gear 17; the third gear 90 and the clutch gear 17 are disposed between the bottom plate 70 and the end cover 80.

The third gear can also be called a transmission gear 90, and one end of the transmission gear 90 extends out of a flat shaft (the flat shaft extends out of the end cover) to serve as an output rotating shaft of the gear transmission mechanism.

In this embodiment, a clutch gear 17 is disposed at a side of the second gear 59 to engage with the second gear, and a third gear 90 is disposed at the same time to serve as a transmission gear, so that torque output effects with different reduction ratios can be achieved through cooperation among the second gear 59, the clutch gear 17 and the third gear 90.

In one implementation manner of this embodiment, the clutch gear is further provided with a first rotating piece 28 and a second rotating piece 27 at two ends, and the clutch gear is sandwiched between the first rotating piece 28 and the second rotating piece 27. With reference to fig. 7b to 7c, the bottom plate 70 is provided with a cavity 703, the cavity 703 is respectively provided with an arc end surface 705, the end cover 80 is provided with a raised rib position 803, the raised rib positions 803 are respectively provided with an arc end surface 805, the third gear 90 and the clutch gear 17 rotate in a meshing manner, and the arc end surface 285 of the first rotating plate 28 and the arc end surface 705 of the bottom plate 70 are overlapped for limiting; the arc end surface 275 of the second rotating sheet 27 is overlapped and limited with the arc end surface 805 of the raised rib position 283 of the end cover 80, so that the meshing transmission of the third gear 90 and the clutch gear 17 is effective.

Which, when driven, can perform an intermeshing rotational movement around said second gear 17. A second inductive element 56 is further fixed to the clutch gear 17, and the second inductive element 56 may be a magnetic steel. A clutch detection PCBA component 72 is fixed on the side of the base plate facing the reduction gear and is in communication connection with the master PCBA component. The clutch detection PCBA assembly includes a sensor, such as a magnetic sensor, adapted to the second inductive element. It is easy to understand that the magnetic steel is fixed on the end face of the clutch gear close to the magnetic control inductor. Clutch detection PCBA subassembly with it has the fender magnetic sheet 37 to press from both sides between the bottom plate, can prevent through setting up the fender magnetic sheet that the magnetic control inductor is triggered by the mistake.

In the present embodiment, the clutch gear 17 includes a first circular shaft and a second circular shaft (not shown) for fixing; the first rotating piece 28 includes: a first through hole 280 through which the second gear 17 passes and an engagement portion 281 for fitting with the first circular shaft; the second rotating piece comprises an engaging part 271 adapted to the second round shaft and a second through hole 270 for the output shaft to pass through; the second sensing element is fixed on the first circular shaft, and when the second sensing element 56 triggers the sensor adapted to itself to output a signal, the main control PCBA assembly determines the signal, turns off the motor, and disengages the clutch gear from the third gear, as shown in fig. 12 b.

In an implementation manner of this embodiment, the transmission gear 90 is provided with a circular shaft (not shown) for fixing, the circular shaft is sleeved in circular holes 700 and 800 adapted to the bottom plate and the end cover, the transmission gear 90 can be fixed between the bottom plate and the end cover, meanwhile, a magnetic steel 58 can be fixedly arranged on an end surface of the transmission gear 90 close to the bottom plate, and when the clutch gear engages with the transmission gear to drive the transmission gear to rotate, the magnetic steel cooperates with a magnetic control sensor on a transmission detection PCBA assembly mounted on the bottom plate to output a signal; by arranging different numbers of sensors and magnetic steels and adopting a method of matching in rows, the control of different rotation angles of the output rotating shaft can be realized on the master control PCBA component.

In this embodiment, as shown in fig. 12a, when the motor is in the non-driving stationary state: reverse rotation power is applied to the output rotating shaft on the transmission gear 90, the transmission gear 90 rotates to drive the clutch gear to rotate to a certain angle, the transmission gear and the clutch gear can be disengaged, and the resistance of the rotation motion of the transmission gear can greatly reduce the engagement of the transmission gear and the clutch gear.

In an implementation manner of this embodiment, when the output torque changes greatly in the motor driving process, the position states of the magnetic control sensors of the main control PCBA assembly, the clutch detection PCBA assembly and the transmission detection PCBA assembly can be controlled by the current control chip, the information can be combined and resolved, the abnormal and timely interruption of the driving can be judged, and the function of preventing the motor from stalling can be realized.

Based on the same inventive concept, the invention also provides an intelligent door lock, which comprises the gear transmission mechanism. The specific structure of the gear transmission mechanism is described above, and is not described herein again.

In summary, the present invention provides a gear transmission mechanism and an intelligent door lock, including: the power device comprises an output end and a first gear, and the first gear is fixed on the output end; the speed reducing device comprises an outer shell, an end cover, a gear structure and a first sensing element; the end cover is fixedly connected with the outer shell to form an accommodating cavity; the gear structure is arranged in the cavity, and the first sensing element is fixed on the gear structure; the gear structure is meshed with the first gear; a master control PCBA component; and a drive detection PCBA assembly comprising a sensor adapted to the first inductive element; the transmission detects the PCBA subassembly and fixes inside the end cover, and with main control PCBA subassembly communication connection. This gear drive mechanism, spatial layout is reasonable, and mechanical transmission dress trades efficiently, and the detection device who sets up is located drive mechanism output position, does benefit to the reliability and the accuracy that improve the detection and judge more, and drive mechanism sets up the clutch teeth and breaks away from and the clutching mechanism of meshing, has both guaranteed motor power output end's power transmission effect, has also rationally reduced output pivot end machinery and has rotated frictional force, but the range of application is more extensive, realizes that the performance improves greatly.

It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.

Claims

1. A gear assembly, comprising:

a master control PCBA component; and

2. The gear transmission of claim 1, wherein the inner wall of the outer housing is provided with teeth, the gear structure comprising:

3. The gear assembly of claim 2, further comprising:

a clutch gear engaged with the second gear; and

a third gear engaged with the clutch gear;

4. The gear assembly of claim 3, further comprising:

the second sensing element is fixed on the clutch gear; and

5. The gear transmission of claim 4, wherein said clutch gear includes a first circular shaft and a second circular shaft for fixing; the first rotating piece includes: a first through hole for the second gear to pass through and a joint part adapted to the first round shaft; the second rotating sheet comprises an engaging part matched with the second round shaft and a second through hole for the output shaft to pass through; the second sensing element is fixed on the first circular shaft, and when the second sensing element triggers the sensor to output a signal adaptive to the second sensing element, the master control PCBA component judges the signal, closes the power device, and enables the clutch gear to be separated from the third gear.

6. The gear assembly of claim 2 wherein said planetary gear set further includes a carrier and a sun gear, said sun gear being fixed to said carrier, said sun gear being in mesh with said planet gears.

7. The gear transmission of claim 6, wherein said planet carrier comprises a primary planet carrier and a secondary planet carrier; the planetary gear comprises a primary planetary gear, a secondary planetary gear and a tertiary planetary gear; the first-stage planetary gear is meshed with the first gear, a sun gear on the first-stage planet carrier is meshed with the second-stage planetary gear, and a sun gear on the second-stage planet carrier is meshed with the third-stage planetary gear.

8. The gear transmission mechanism according to claim 3, wherein the bottom plate is provided with a cavity, and a circular arc end face is arranged in the cavity;

9. The gear transmission mechanism of claim 1, wherein the master PCBA assembly comprises: the power device comprises a driving chip for driving the power device, a voltage stabilizing chip for controlling and inputting the voltage of the power device, a current control chip for controlling and inputting the current of the power device and an external port for outputting a connecting wire.

10. An intelligent door lock, characterized in that it comprises a gear transmission according to any one of claims 1 to 9.