Clutch transmission device of intelligent door lock

Abstract

The invention provides a clutch transmission device of an intelligent door lock. The clutch transmission device comprises a shell, a gearbox, an elastic clutch piece, a mandrel and a handle. Wherein the shell comprises a front end cover and a rear end cover, and a front through hole of the front end cover and a rear through hole of the rear end cover are located on the same axis; the core shaft is arranged in a front through hole of the front end cover in a penetrating manner and is used for being connected with a lock cylinder of the intelligent door lock; the gear box is arranged in the rear through hole of the rear end cover in a penetrating manner and can transmit torque generated by the motor to the mandrel; the elastic clutch piece is located at the front end of the gearbox and can separate the mandrel from a transmission piece on the gearbox. The handle is located at the rear end of the gearbox and can enable a transmission piece of the gearbox to be meshed with the mandrel. The door handle has the advantages that the electric clutch transmission device and the manual clutch transmission device are integrally arranged in the door handle, non-destructive clutch installation can be achieved, and universality is high.

Description

Technical Field

[0001] The present invention relates to the technical field of door lock control, and in particular to a clutch of an intelligent door lock. Background Art

[0002] The door handle is an important part of the door lock. By controlling the door handle to drive the door lock transmission part to rotate, the door lock can be opened. In the prior art, the handle of the electronic door lock is only a component that transmits the force of people twisting to unlock the door. Generally, such handles are solid. Even if the handle is a hollow structure, the built-in space is very narrow. Therefore, people usually design the clutch control mechanism and electronic components of the complex electronic door lock in the lock body instead of the handle. Since there is sufficient space in the lock body to accommodate all the detection and automation control mechanisms, such a lock body structure is generally large in size, expensive, and inconvenient to install and maintain.

[0003] We know that the clutch control mechanisms of electronic door locks currently on the market are divided into two categories. One type is that the clutch is on the electronic lock panel, and the clutch controls the disengagement and connection of the electronic lock handle and the square rod, so that when the clutch is closed, the square rod can transmit the rotation of the handle to the lock body to open the door. The advantage of this type of lock is that the lock body is a purely mechanical component, with good reliability and low cost. However, there are also major adaptability issues. There are many types of mechanical lock bodies on the market, and there is no unified standard for the various sizes and specifications of the square rod position. What's more troublesome is that some mechanical lock bodies can only open one oblique tongue for the square rod connection hole outside the door, which cannot meet the needs of the electronic lock to open all the lock tongue functions. Therefore, when installing this type of electronic lock, it is necessary to remove the lock body on the original door and replace it with a mechanical lock body that matches the electronic lock to ensure the normal operation of the electronic lock. The other type is to build the clutch into the lock body. The door handle is connected to the square rod hole on the lock body inside the door through a square rod. After the authentication is passed, the electronic module controls the clutch in the lock body to connect and close the square rod hole of the lock body and the actuator of the lock body. In this way, the square rod can convert the force on the handle into the force to control the lock tongue of the lock body, thereby opening the door. This type of electronic lock with a clutch in the lock body must replace the mechanical lock body on the door during installation, and faces the same process of lock body disassembly as the first type of electronic lock. Since the opening of the new lock body on the door may be different from the position of the lock body during the replacement of the lock body, a new hole needs to be opened on the door. In a worse situation, the position and size of the insertion hole of the lock tongue on the door frame also need to be adjusted according to different lock bodies. This installation method destroys the original structure of the door and door frame. The industry calls it "destructive" installation. It will directly lead to the destruction of the user's original door and door frame. The installation worker's work error will lead to the replacement of the door and door frame, which brings great trouble to the user. What is even more troublesome is that since different electronic locks use different lock bodies, when users replace electronic locks with other ones, the door and door frame are likely to be damaged again.

[0004] The Chinese patent publication number is CN106223731A, and its name is a direct-drive transmission device for a door lock motor. The patent discloses a direct-drive transmission device for a door lock motor, including a lock core, a pull bar, an unlocking knob, a driving bevel gear, a reduction motor, a motor bevel gear, a photoelectric switch, a grating encoder disk, an inner door panel, a bottom plate, a buffer pad, and a locking cover; the driving bevel gear is meshed with the motor bevel gear, and the reduction motor is connected and matched with the motor bevel gear through its power output end; specifically, the motor bevel gear and the driving bevel gear are a pair of mutually meshing bevel gears, and the reduction motor transmits the power level torque to the motor bevel gear through its power output end, and the motor bevel gear is meshed with the driving bevel gear to transmit the power to the pull bar through the buffer pad inside the driving bevel gear, and the rotation of the pull bar drives the lock core and the unlocking knob to rotate, thereby realizing automatic locking or unlocking; the unlocking knob is arranged on the inner door panel, and the inner door panel is installed during installation. Installed on the inner side of the door; the driving bevel gear, reduction motor, motor bevel gear, photoelectric switch, grating code disk, buffer pad and locking cover are arranged on the bottom plate, and the buffer pad is tightly combined with the driving bevel gear; the grating code disk is arranged between the reduction motor and the end face of the motor bevel gear, and the notch of the photoelectric switch cooperates with the grating code disk; when the reduction motor is in motion, its power output end drives the grating code disk to rotate, and the photoelectric switch is used to detect the rotation signal of the grating code disk; the buffer pad is arranged inside the driving bevel gear, and the raised part of the driving bevel gear passes through the circular hole of the bottom plate and is fixedly connected with the locking cover; the pull bar passes through the inner panel of the door, and passes through the driving bevel gear, the bottom plate, the lock core, the buffer pad and the locking cover in sequence. Specifically, the pull bar passes through the center of the driving bevel gear, one end is connected to the unlocking knob, and the other end is connected to the lock core. However, this scheme has the following disadvantages: 1. The motor direct drive transmission device is installed in the lock body, and the lock body must be disassembled during installation and maintenance, which is costly. 2. The handle of this patent is a pure torque component.

[0005] In short, on the one hand, how to solve the non-destructive installation will be an important issue in the electronic lock aftermarket. On the other hand, in order to reduce the cost and size of electronic door locks while realizing the function of electronic unlocking, technicians are trying to explore whether all the functions of door lock electronic control can be realized in the rear handle. The clutch drive mechanism set in the rear handle is the key component. Summary of the invention

[0006] In order to overcome the deficiencies of the prior art, the present invention provides a clutch transmission device for a smart door lock. The clutch transmission device uses an electric and manual clutch integrated in a handle, has high integration, strong versatility, and can achieve non-destructive clutch installation.

[0007] The technical solution of the present invention is achieved by the following methods:

[0008] The present invention discloses a clutch transmission device of an intelligent door lock, comprising: a shell, a gear box, an elastic clutch, a core shaft and a handle; wherein the shell comprises a front end cover and a rear end cover, the front through hole of the front end cover and the rear through hole of the rear end cover are both located on the same axis; the core shaft is passed through the front through hole of the front end cover and is used to connect the lock core of the intelligent door lock; the gear box is passed through the rear through hole of the rear end cover and can transmit the torque generated by the motor to the core shaft; the elastic clutch is located at the front end of the gear box and can separate the core shaft from the transmission member on the gear box; the handle is located at the rear end of the gear box and can mesh the transmission member of the gear box with the core shaft.

[0009] As a further limitation of the present invention, a torsion spring is provided between the rear end cover and the gear box for rotational connection therebetween; a shaft sleeve is provided between the front through hole of the front end cover and the core shaft, and the core shaft can rotate relative to the housing.

[0010] As a further limitation of the present invention, the output shaft section of the core shaft is located on the outside of the front end cover of the shell, and a square hole is provided at its distal end along the axial direction of the core shaft for plugging in a square rod; the input shaft section of the core shaft is located on the inside of the front end cover of the shell, for receiving the output torque of the gear box; the driven grinding disc of the core shaft is provided at the connection between the output shaft section and the input shaft section, for meshing the transmission part of the gear box with the core shaft; wherein the outer diameter of the driven grinding disc is larger than the outer diameter of the input shaft section and the outer diameter of the output shaft section.

[0011] As a further limitation of the present invention, an annular ring is provided on the rotating part of the gearbox along the axial direction of the rotating part, and the inner ring of the annular ring has inner teeth extending radially inward; external teeth are provided on the input shaft section of the core shaft along the radial direction; the external teeth and the internal teeth are each provided in two numbers, which are distributed at intervals along the circumferential direction.

[0012] As a further limitation of the present invention, the outer teeth of the spindle are inserted into the annular ring of the rotating member to form a pivot mechanism, and the preset rotation stroke of the rotating member of the gear box is greater than the unlocking rotation stroke of the spindle.

[0013] As a further limitation of the present invention, a bearing is provided between the inner ring of the transmission member of the gear box and the outer ring of the annular ring of the rotating member, for rotationally connecting the transmission member and the rotating member.

[0014] As a further limitation of the present invention, the outer ring diameter and the inner ring diameter of the active grinding disc of the transmission member are substantially the same as the outer ring diameter and the inner ring diameter of the driven grinding disc of the mandrel, so as to facilitate complete engagement of the active grinding disc and the driven grinding disc.

[0015] As a further limitation of the present invention, the elastic clutch member is an elastic wave ring, the outer diameter of the elastic wave ring is substantially the same as the outer diameter of the transmission member, and the inner diameter of the elastic wave ring is slightly larger than the outer diameter of the active grinding disc.

[0016] As a further limitation of the present invention, the axis lines of the gear box, the elastic clutch, the core shaft and the handle are located on the same axis.

[0017] As a further limitation of the present invention, the elastic wave ring, the active grinding disc of the transmission member and the driven grinding disc of the core shaft constitute a manual clutch mechanism for manual unlocking of the smart door lock.

[0018] Beneficial effects of the present invention:

[0019] The clutch transmission device of the smart door lock of the present invention adopts a pivot mechanism formed by the rotating part of the gear box and the core shaft to transmit the torque of the gear box to the lock core for unlocking or locking the smart door lock; it also adopts the rotation of the handle to drive the axial movement of the gear box, so that the transmission part of the gear box and the core shaft are engaged, thereby realizing manual unlocking of the smart door lock; the present invention integrates manual and electric clutch transmission mechanisms into the door handle, with high integration, and can realize the installation of non-destructive clutch door handles, so it has good versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 This is one of the schematic diagrams of the exploded structure of the clutch transmission device of the smart door lock according to the embodiment of the present invention;

[0022] Figure 2 This is the second schematic diagram of the exploded structure of the clutch transmission device of the smart door lock according to the embodiment of the present invention;

[0023] Figure 3 Schematic diagram of the overall structure of the clutch transmission device of the smart door lock according to the embodiment of the present invention;

[0024] Figure 4 is a schematic structural diagram of a gear box of a clutch transmission device of an intelligent door lock according to an embodiment of the present invention;

[0025] Figure 5 Schematic diagram of the exploded structure of the gear box of the clutch transmission device of the smart door lock according to the embodiment of the present invention;

[0026] Figure 61 is a schematic structural diagram of a rotating part of a gear box of a clutch transmission device of an intelligent door lock according to an embodiment of the present invention;

[0027] Figure 7 1 is a schematic structural diagram of a transmission member of a gear box of a clutch transmission device of an intelligent door lock according to an embodiment of the present invention;

[0028] Figure 8 1 is a schematic diagram of the structure of the spindle of the clutch transmission device of the smart door lock according to an embodiment of the present invention;

[0029] Fig. 9 is a structural schematic diagram of another perspective of the core shaft of the clutch transmission device of the smart door lock according to an embodiment of the present invention;

[0030] Fig.10 It is a schematic diagram of a manual unlocking structure composed of a gear box, an elastic wave ring and a core shaft of a clutch transmission device of an intelligent door lock according to an embodiment of the present invention;

[0031] Fig.11 Schematic diagram of the gear box and spindle structure of the clutch transmission device of the smart door lock according to the embodiment of the present invention;

[0032] Figure 12a-12e It is a schematic diagram of the working state of the pivot mechanism composed of the spindle and the rotating member of the smart door lock according to an embodiment of the present invention.

[0033] Figure numerals: housing 1; front end cover 11; front through hole 111; rear end cover 12; rear through hole 121; gear box 2; motor 21; transmission member 22; active grinding disc 221; force-bearing part 222; block 223; countersunk screw hole 224; rotating member 23; annular ring 231; internal teeth 232; middle shaft 233; planetary shaft 234; bearing 24; gear set 25; housing 251; gear 252; slot 253; countersunk screw hole 224; elastic clutch member 3; elastic wave ring 31; spindle 4; output shaft section 41; square hole 411; input shaft section 42; external teeth 421; driven grinding disc 43; handle 5; torsion spring 6; sleeve 7. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not necessarily indicate a quantity limitation. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] See also Figure 1 , Figure 2 and Figure 3 The clutch transmission device of the smart door lock includes: a housing 1, a gear box 2, an elastic clutch member 3, a core shaft 4 and a handle 5, wherein the axis lines of the gear box 2, the elastic clutch member 3, the core shaft 4 and the handle 5 coincide.

[0037] The shell 1 includes a front cover 11 and a rear cover 12, which are snap-fitted together to form a receiving cavity of the shell 1. A front through hole 111 and a rear through hole 121 are respectively provided in the middle of the front cover 11 and the rear cover 12, and the central axes of the front through hole 111 and the rear through hole 121 coincide with each other.

[0038] The core shaft 4 is passed through the front through hole 111 of the front end cover 11 of the shell 1, and the core shaft 4 is used to connect the lock core of the smart door lock; the gear box 2 is passed through the rear through hole 121 of the rear end cover 12 of the shell 1, and the gear box 2 can transmit the torque generated by the motor 21 to the core shaft 4. The core shaft 4 rotates clockwise or counterclockwise under the torque of the motor 21, driving the lock core of the smart door lock to open or close the door.

[0039] The elastic clutch 3 is located between the front end cover 11 of the housing 1 and the front end of the gear box 2 . The elastic clutch 3 is an elastic wave ring 31 . The elastic wave ring 31 can separate the core shaft 4 from the transmission member 22 on the gear box 2 .

[0040] The handle 5 is located at the rear end of the gear box 2, and can engage the transmission member 22 of the gear box 2 with the core shaft 4. Specifically, when the handle 5 is screwed, the transmission member 22 on the gear box 2 is driven to rotate forward along the axial direction of the clutch transmission device, so that the handle 5, the gear box 2 and the transmission member 22 rotate synchronously with the core shaft 4 to achieve manual unlocking.

[0041] A torsion spring 6 is arranged between the outer side of the rear end cover 12 of the shell 1 and the gear box 2. The gear box 2 can be rotated and reset in the rear through hole 121 of the rear end cover 12 of the shell 1. A sleeve 7 is arranged between the front through hole 111 of the front end cover 11 of the shell 1 and the core shaft 4, so that the core shaft 4 can rotate relative to the shell 1.

[0042] like Figure 4 and Figure 5 As shown, it is a schematic diagram of the structure of the gearbox 2, which includes: a motor 21, a transmission member 22, a rotating member 23, a bearing 24 and a gear set 25. Among them, the motor 21 is electrically connected to the control board of the smart door lock, and the control board is used to accurately control the rotation stroke of the output spindle of the motor 21. The output spindle of the motor 21 is connected to the input end of the gear set 25, and the output end of the gear set 25 is connected to the rotating member 23. The gear set 25 is mainly composed of a box 251 and a gear 252. When the motor 21 is powered on, it rotates, and after being transmitted by the gear set 2, the torque is output through the rotating member 23. A transmission member 22 is also installed at the front end of the gear set 25. The transmission member 22 is annular in structure, and a bearing 24 is arranged between the inner ring of the transmission member 22 and the rotating member 23, thereby realizing the rotation connection between the transmission member 22 and the rotating member 23, ensuring that the transmission member 22 and the rotating member 23 are assembled without interference.

[0043] like Figure 6 As shown, on the rotating member 23 of the gear box 2, an annular ring 231 is extended outwardly along the axis direction of the rotating member 23, and the inner ring of the annular ring 231 has inner teeth 232 extending radially inwardly. The number of inner teeth 232 is two and they are spaced apart along the circumferential direction. A central axis 233 is provided at the center of the rotating member 23, and a plurality of planetary shafts 234 are evenly distributed along the circumferential direction of the central axis 233 on the other side of the annular ring 231 of the rotating member 23, and the planetary shafts 234 are used to connect the gear set 25.

[0044] like Figure 5 and Figure 7 As shown, an annular active grinding disc 221 is provided outside the transmission member 22 of the gear box 2 and extends outward between the inner ring and the outer ring of the transmission member 22. The inner ring of the active grinding disc 221 is close to the inner ring of the transmission member 22, and a force-bearing portion 222 is provided between the outer ring of the active grinding disc 221 and the outer ring of the transmission member 22. The force-bearing portion 222 is adapted to the elastic wave ring 31. A clamping block 223 is provided at the edge of the inner side surface of the transmission member 22 of the gear box 2 and extends outward along the circumferential direction. The clamping block 223 is engaged with the clamping groove 253 on the housing 251 of the gear set 25. A plurality of countersunk screw holes 224 are also provided on the force-bearing portion 222. Countersunk screws are installed in the countersunk screw holes 224 to fix the transmission member 22 to the front end of the housing 251 of the gear set 25.

[0045] like Figure 8 and Fig. 9 As shown, the mandrel 4 is located in the front through hole 111 of the front end cover 11 of the housing 1, and a sleeve 7 is arranged between the mandrel 4 and the hole wall of the front through hole 111. The mandrel 4 includes: an output shaft section 41, an input shaft section 42 and a driven grinding disc 43, wherein the output shaft section 41 is located on the outside of the front end cover 11 of the housing 1, and a square hole 411 is arranged at its far end along the axial direction of the mandrel, and the square hole 411 is used to plug in the square rod; the input shaft section 42 is located on the inner side of the front end cover 11 of the housing 1, For receiving the torque outputted by the gearbox 2, an external tooth 421 is provided on the input shaft section 42 extending radially outwards, and the number of external teeth 421 is two, which are spaced apart along the circumference of the input shaft section 42; a driven grinding disc 43 is provided at the connection between the output shaft section 41 and the input shaft section 42, and is used to mesh the transmission member 23 of the gearbox 2 with the mandrel 4; the outer diameter of the driven grinding disc 43 is larger than the outer diameter of the input shaft section 42 and the outer diameter of the output shaft section 41. The outer ring diameter of the driven grinding disc 43 of the mandrel 4 is substantially the same as the outer ring diameter of the active grinding disc 221 of the transmission member 22, and the inner ring diameter of the driven grinding disc 43 of the mandrel 4 is substantially the same as the inner ring diameter of the active grinding disc 221 of the transmission member 22, so as to facilitate the complete meshing of the active grinding disc 221 and the driven grinding disc 43.

[0046] like Fig.10 As shown, in this embodiment, the elastic clutch member 3 is an elastic wave ring 31, the outer diameter of the elastic wave ring 31 is substantially the same as the outer diameter of the transmission member 22, the inner diameter of the elastic wave ring 31 is slightly larger than the outer diameter of the active grinding disc 221, and the active grinding disc 221 is located inside the inner circle of the elastic wave ring 31. The elastic wave ring 31, the active grinding disc 221 of the transmission member 22 of the gear box 2, and the driven grinding disc 43 of the spindle 4 constitute a manual clutch mechanism of the clutch transmission device of the smart door lock, thereby realizing manual unlocking of the smart door lock. Specifically, when the handle 5 is manually driven to rotate clockwise, the gear box 2 is acted upon by the force of the handle 5, and the active grinding disc 221 of the transmission member 22 on the gear box 2 rotates forward along the axis toward the driven grinding disc 43 of the spindle 4, and the elastic wave ring 31 is acted upon by the force of the force-bearing part 222 on the transmission member 22 of the gear box 2, and produces compression deformation along the direction of its central axis. When the active grinding disc 221 of the transmission member 22 on the gear box 2 moves forward and is completely meshed with the driven grinding disc 43 of the spindle 4, the gear box 2 stops moving forward and continues to rotate in the original clockwise direction, thereby driving the spindle 4 to rotate and driving the lock core of the smart door lock to unlock; when the handle 5 is released, due to the reset of the torsion spring 6, the handle 5 rotates counterclockwise relative to the gear box 2, and at the same time, the elastic wave ring 31 is elastically reset to separate the active grinding disc 221 of the transmission member 22 on the gear box 2 from the driven grinding disc 43 of the spindle 4, completing manual unlocking.

[0047] like Figure 5 and Fig.11As shown, in this embodiment, the gearbox 2 is mainly composed of a motor 21, a transmission member 22, a rotating member 23, a bearing 24 and a gear set 25. The motor 21 is electrically connected to the control board of the smart door lock, and the output spindle of the motor 21 is connected to the input end of the gear set 25. The output end of the gear set 25 is connected to the rotating member 23. The control board of the smart door lock can accurately control the rotation stroke of the rotating member 23 of the motor 21. The specific structural form of the gearbox 2 can be realized by using existing technology, so it will not be repeated in this article. The gearbox 2 is installed in the rear through hole 121 of the rear end cover 12 of the housing 1. The gearbox 2 can transmit the positive and negative torque generated by the motor 21 to the spindle 4, thereby realizing the unlocking or locking of the lock cylinder of the smart door lock.

[0048] The outer teeth 421 of the input shaft section 42 of the core shaft 4 are inserted into the annular ring 231 of the rotating part 23 on the gear box 2 to form a pivot mechanism. The motor 21 drives the rotating part 23 to rotate clockwise or counterclockwise through the gear set 25. The inner teeth 232 of the annular ring 231 of the rotating part 23 can drive the outer teeth 421 of the input shaft section 42 of the core shaft 4 to rotate, thereby driving the lock core of the smart door lock to unlock or lock, wherein the preset rotation stroke of the rotating part 23 of the gear box 2 is greater than the unlocking rotation stroke of the core shaft 4.

[0049] like Fig.12a Fig.12e 2 is a schematic diagram of the working state of the pivot mechanism composed of the core shaft 4 and the rotating member 23 of this embodiment. The two external teeth 421 of the core shaft 4 are inserted into the annular ring 231 of the rotating member 23 on the gear box 2 to form a pivot mechanism. The two external teeth 421 of the core shaft 4 and the two internal teeth 232 of the rotating member 23 are located in the same plane, thereby forming a clutch matching pair that abuts against each other. Among the two internal teeth 232 of the rotating member 23, the two side walls of one of the internal teeth 232 are A1 and A2 respectively, and the two side walls of the other internal teeth 232 are A3 and A4 respectively; among the two external teeth 421 of the core shaft 4, the two side walls of one of the external teeth 421 are B1 and B2 respectively, and the two side walls of the other external teeth 421 are B3 and B4 respectively. Fig.12a It is the locking working position, and the side walls of the two inner teeth 232 are not in contact with the side walls of the two outer teeth 421; Figure 12b As the gear box 2 drives the inner teeth 232 of the rotating member 23 to rotate clockwise, after the rotating member 23 has traveled a certain distance without load, the side walls A1 and A4 of the inner teeth 232 of the rotating member 23 abut against the side walls B2 and B4 of the outer teeth 421 of the core shaft 4, respectively. Figure 12b A1B2, A4B3 shown in; Fig.12c , the rotating member 23 continues to rotate clockwise, and drives the outer teeth 421 of the core shaft 4 to rotate synchronously clockwise to achieve unlocking.

[0050] Next, if Fig.12d As shown, the gear box 2 drives the inner teeth 232 of the rotating member 23 to rotate counterclockwise until Fig.12e In the working position, after the rotating member 23 has traveled unloaded for a period of time, the side walls A2 and A3 of the inner teeth 232 of the rotating member 23 abut against the side walls B4 and B1 of the outer teeth 421 of the core shaft 4, respectively. Fig.12d A2B4, A3B1 shown in; Fig.12e , the rotating member 23 continues to rotate counterclockwise, and drives the outer teeth 421 of the core shaft 4 to rotate synchronously counterclockwise to achieve locking.

[0051] In this embodiment, in the pivot mechanism formed by the core shaft 4 and the rotating member 23, when the gear box 2 drives the rotating member 23 to switch between clockwise rotation and counterclockwise rotation, the gear box 2 first runs at no load for a certain stroke, and then pivots with the core shaft 4 to drive the core shaft 4 to rotate, thereby reducing the load current of the motor 21 of the gear box 2 at startup, reducing the failure rate of the motor, extending the service life, and enhancing the reliability of the clutch transmission device.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The clutch transmission device of the smart door lock is characterized by: include: A housing (1), a gear box (2), an elastic clutch (3), a core shaft (4) and a handle (5); The housing (1) comprises a front end cover (11) and a rear end cover (12), and the front through hole (111) of the front end cover (11) and the rear through hole (121) of the rear end cover (12) are both located on the same axis; The core shaft (4) is inserted into the front through hole (12) of the front end cover (11) and is used to connect to the lock core of the smart door lock; The gear box (2) is inserted into the rear through hole (121) of the rear end cover (12) and is capable of transmitting the torque generated by the motor to the core shaft (4); The elastic clutch member (3) is located at the front end of the gear box (2) and is capable of separating the core shaft (4) from the transmission member (22) on the gear box (2); The handle (5) is located at the rear end of the gear box (2) and is capable of meshing the transmission member (22) of the gear box (2) with the core shaft (4).

2. The clutch transmission device of the intelligent door lock according to claim 1, characterized in that: A torsion spring (6) is provided between the rear end cover (12) and the gear box (2) for rotational connection between the two; A shaft sleeve (7) is provided between the front through hole (111) of the front end cover (11) and the core shaft (4), and the core shaft (4) can rotate relative to the housing (1).

3. The clutch transmission device of the intelligent door lock according to claim 2, characterized in that: The output shaft section (41) of the core shaft (4) is located outside the front end cover (11) of the housing (1), and a square hole (411) is provided at the far end thereof along the axial direction of the core shaft (4) for inserting a square rod; The input shaft section (42) of the core shaft (4) is located on the inner side of the front end cover (11) of the housing (1) and is used to receive the torque output by the gear box (2); The driven grinding disc (43) of the spindle (4) is arranged at the connection between the output shaft section (41) and the input shaft section (42) and is used to mesh the transmission member (22) of the gear box (2) with the spindle (4); The outer diameter of the driven grinding disc (43) is larger than the outer diameter of the input shaft section (42) and the outer diameter of the output shaft section (41).

4. The clutch transmission device of the intelligent door lock as claimed in claim 3, characterized in that: An annular ring (231) is provided on the rotating member (23) of the gear box (2) and extends outwardly along the axis of the rotating member (23), and the inner ring of the annular ring (231) has inner teeth (232) extending radially inwardly; An input shaft section (42) of the core shaft (4) is provided with external teeth (421) extending radially outward; The outer teeth (421) and the inner teeth (232) are each provided in pairs and are spaced apart and distributed along the circumferential direction.

5. The clutch transmission device of the intelligent door lock as claimed in claim 4, characterized in that: The outer teeth (421) of the spindle (4) are inserted into the annular ring (231) of the rotating member (23) to form a pivot mechanism, and the preset rotation stroke of the rotating member (23) of the gear box (2) is greater than the unlocking rotation stroke of the spindle (4).

6. The clutch transmission device of the intelligent door lock as claimed in claim 5, characterized in that: A bearing (24) is provided between the inner ring of the transmission member (22) of the gear box (2) and the outer ring of the annular ring (231) of the rotating member (23) for rotationally connecting the transmission member (22) and the rotating member (23).

7. The clutch transmission device of the intelligent door lock according to claim 6, characterized in that: The outer diameter and inner diameter of the active grinding disc (221) of the transmission member (22) are substantially the same as the outer diameter and inner diameter of the driven grinding disc (43) of the spindle (4), so that the active grinding disc (221) and the driven grinding disc (43) are fully meshed.

8. The clutch transmission device of the intelligent door lock according to claim 7, characterized in that: The elastic clutch member (3) is an elastic wave ring (31), the outer diameter of the elastic wave ring (31) is substantially the same as the outer diameter of the transmission member (22), and the inner diameter of the elastic wave ring (31) is slightly larger than the outer ring diameter of the active grinding disc (221).

9. The clutch transmission device of the intelligent door lock according to claim 8, characterized in that: The axis lines of the gear box (2), the elastic clutch (3), the core shaft (4) and the handle (5) coincide with each other.

10. The clutch transmission device of the intelligent door lock according to claim 9, characterized in that: The elastic wave ring (31), the active grinding disc (221) of the transmission member (22) and the driven grinding disc (43) of the spindle (4) constitute a manual clutch mechanism for manually unlocking the intelligent door lock.

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