Gear clutch mechanism for locks and its smart door lock

Abstract

This utility model relates to the field of lock technology, and in particular to a gear clutch mechanism for locks and its intelligent door lock. The gear clutch mechanism for locks includes a housing body, an output gear, a planetary gear swing arm mechanism, and a driving component. The planetary gear swing arm mechanism includes a driving gear, a planet carrier, a first planetary gear, and a second planetary gear. The driving gear meshes with both the first and second planetary gears for transmission. The driving component drives the driving gear in a forward direction, and the planetary gear swing arm mechanism swings to a first position, causing the first planetary gear to mesh with the output gear for transmission. The driving component drives the driving gear in a reverse direction, and the planetary gear swing arm mechanism swings to a second position, causing the second planetary gear to mesh with the output gear for transmission. This clutch mechanism engages the output gear oscillatingly through the planetary gear swing arm mechanism. The output gear can drive the lock tongue in and out, thereby realizing the locking and unlocking action. The overall structure is relatively simple, the manufacturing cost is low, and the clutch is reliable.

Description

Technical Field

[0001] This utility model belongs to the field of lock technology, and in particular relates to a gear clutch mechanism for locks and its intelligent door lock. Background Technology

[0002] With the advancement of science and technology, people's demand for smart technology is increasing, giving rise to a series of smart home products to help people live more conveniently. As an important component of modern home security, smart door locks not only provide convenient usage methods, such as fingerprint unlocking and facial recognition unlocking, but also bring a high-end intelligent experience and thoughtful security functions, such as visual doorbells and door lock alarms.

[0003] Existing smart door locks generally use gear movement to achieve clutch engagement. Typically, a door lock is equipped with a moving gear. When the lock needs to be opened or closed, the unlocking motor ejects the moving gear and engages the bolt's transmission mechanism. The bolt is engaged or disengaged by the forward and reverse rotation of the motor. However, this gear-moving clutch structure has the problems of complex product structure, high manufacturing cost, and poor clutch reliability.

[0004] Therefore, this utility model addresses the aforementioned technical problems by providing a gear clutch mechanism for locks and its intelligent door lock. The output gear is engaged oscillatingly through a planetary gear swing arm mechanism, and the output gear can drive the lock tongue to engage and disengage. The structure is simple, the cost is low, and the clutch is reliable, thus solving one or more of the aforementioned problems. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides a gear clutch mechanism for locks, comprising:

[0006] The shell body includes an upper shell cover and a lower shell, the upper shell cover is fastened to the lower shell, and the upper shell cover closes the lower shell to form a receiving cavity;

[0007] An output gear is rotatably mounted in the receiving cavity. An opening slot is provided on one side of the lower housing. The teeth of the output gear extend radially out of the opening slot, and the output gear outputs power through the teeth protruding from the opening slot.

[0008] A planetary gear swing arm mechanism is oscillatingly mounted within the receiving cavity. The planetary gear swing arm mechanism includes a driving gear, a planet carrier, a first planetary gear, and a second planetary gear. The driving gear is rotatably mounted at the center of the planet carrier. The first planetary gear and the second planetary gear are rotatably mounted on the planet carrier. The first planetary gear and the second planetary gear are symmetrically located on both sides of the driving gear. The driving gear meshes with both the first planetary gear and the second planetary gear for transmission.

[0009] A drive component is fastened to the bottom side of the lower housing, and the output shaft of the drive component extends into the receiving cavity, the output shaft engaging and driving the drive gear;

[0010] The driving component drives the driving gear in the forward direction, and the planetary gear swing arm mechanism swings to the first position so that the first planetary gear meshes with the output gear for transmission.

[0011] The driving component drives the driving gear in the opposite direction, and the planetary gear swing arm mechanism swings to the second position so that the second planetary gear meshes with the output gear for transmission.

[0012] The upper shell cover is provided with a first limiting part and a second limiting part. When the planetary mechanism is rotated to the first position, the first limiting part abuts against the first end face of the planetary carrier. When the planetary mechanism is rotated to the second position, the second limiting part abuts against the second end face of the planetary carrier.

[0013] Optionally, in some technical solutions, a first mounting seat is provided on the inner bottom surface of the lower housing, and the first mounting seat is adapted to be rotatably mounted on the output gear.

[0014] Optionally, in some technical solutions, a first bearing is formed in the first mounting base, a second bearing is provided on the inner side of the upper shell cover, and the output gear is rotatably connected to the first bearing and the second bearing via a first gear shaft.

[0015] Optionally, in some technical solutions, a limiting ring is formed on the first mounting base, and a stabilizing ring is provided on one end face of the output gear. The stabilizing ring is nested within the limiting ring, and the stabilizing ring is limited by the limiting ring, thereby enabling the output gear to rotate stably.

[0016] Optionally, in some technical solutions, a second mounting seat is provided on the bottom side of the lower housing, the drive component is fastened in the second mounting seat, and the output shaft passes through the lower housing and extends into the receiving cavity.

[0017] Optionally, in some technical solutions, the second mounting base is provided with a first through hole, and the inner side of the upper shell cover is also provided with a third shaft seat, the output shaft passes through the first through hole and is rotatably mounted and connected to the third shaft seat.

[0018] Optionally, in some technical solutions, the output shaft is formed as a D-shaped shaft, the drive gear is formed with a D-shaped hole, the planet carrier is provided with a second through hole, the output shaft passes through the D-shaped hole and the second through hole and is installed and connected to the third shaft seat, and the output shaft is tightly fitted with the second through hole.

[0019] Optionally, in some technical solutions, both the first planetary gear and the second planetary gear are equipped with a second gear shaft that is rotatably mounted on the planet carrier. The upper end of the second gear shaft is provided with a first slot, and the first slot is adapted with an E-type buckle to engage the second gear shaft on the planet carrier.

[0020] Optionally, in some technical solutions, the lower housing is provided with a positioning post and a mounting post, and the upper housing cover is provided with a positioning hole and a mounting hole. The positioning post is adapted to the positioning hole to install the upper housing cover, and the mounting post is adapted to the mounting hole to securely install the upper housing cover.

[0021] In addition, this utility model also provides an intelligent door lock that applies the above-mentioned gear clutch mechanism for locks.

[0022] The technical solution of this utility model has the following advantages or beneficial effects:

[0023] The gear clutch mechanism for locks provided by this utility model includes a housing body, an output gear, a planetary gear swing arm mechanism, and a driving component. The housing body includes an upper housing cover and a lower housing. The upper housing cover is fastened to the lower housing, and the upper housing cover closes the lower housing to form a receiving cavity. The output gear is rotatably mounted in the receiving cavity. An opening slot is provided on one side of the lower housing, and the teeth of the output gear extend radially out of the opening slot, outputting power. The planetary gear swing arm mechanism is oscillatingly mounted in the receiving cavity. The planetary gear swing arm mechanism includes a driving gear, a planet carrier, a first planetary gear, and a second planetary gear. The driving gear is rotatably mounted at the center of the planet carrier. Both the first and second planetary gears are rotatably mounted on the planet carrier. The planetary gears are symmetrically located on both sides of the driving gear, and the driving gear meshes with both the first and second planetary gears for transmission. The drive component is fastened to the bottom side of the lower housing, and its output shaft extends into the receiving cavity, engaging and driving the driving gear. When the drive component drives the driving gear in the forward direction, the planetary gear swing arm mechanism rotates to the first position, causing the first planetary gear to mesh with the output gear for transmission. When the drive component drives the driving gear in the reverse direction, the planetary gear swing arm mechanism rotates to the second position, causing the second planetary gear to mesh with the output gear for transmission. The upper housing cover is provided with a first limiting part and a second limiting part. When the planetary mechanism rotates to the first position, the first limiting part abuts against the first end face of the planetary carrier; when the planetary mechanism rotates to the second position, the second limiting part abuts against the second end face of the planetary carrier. This clutch mechanism uses the drive component to drive the planetary gear swing arm mechanism to swing and engage the output gear, which in turn drives the locking tongue in and out, thereby realizing the locking and unlocking action. The overall structure of this clutch mechanism is relatively simple, the manufacturing cost is low, and the clutch engagement is reliable. Attached Figure Description

[0024] Embodiments of the present invention will be described more fully with reference to the accompanying drawings. However, the accompanying drawings are for illustration and explanation only and do not constitute a limitation on the scope of the present invention.

[0025] Figure 1 This is a schematic diagram of the gear clutch mechanism for locks according to the present invention.

[0026] Figure 2 This is an exploded view of the gear clutch mechanism for locks according to this utility model;

[0027] Figure 3 This is a schematic diagram of the lower shell of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the upper shell cover of this utility model;

[0029] Figure 5 This is a schematic diagram of the planetary carrier of this utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the drive gear of this utility model;

[0031] Figure 7 This is a schematic diagram of the output gear of this utility model;

[0032] Figure 8 A schematic diagram showing the position of the gear clutch mechanism for a lock in the disengaged state;

[0033] Figure 9 This is a schematic diagram of the first position of the gear clutch mechanism for a lock in the engaged state.

[0034] Figure 10 This is a schematic diagram of the second position of the gear clutch mechanism for a lock in the engaged state.

[0035] Illustration:

[0036] 1. Main body; 2. Output gear; 3. Planetary gear swing arm mechanism; 4. Drive component; 5. Upper shell cover; 6. Lower shell; 7. Receiving cavity; 8. Opening slot; 9. Drive gear; 10. Planet carrier; 11. First planetary gear; 12. Second planetary gear; 13. Output shaft; 14. First limiting part; 15. Second limiting part; 16. First end face; 17. Second end face; 18. Gear tooth part; 19. First mounting seat; 20. First shaft seat; 21. Second shaft seat; 22. First gear shaft; 23. Limiting ring; 24. Stabilizing ring; 25. Second mounting seat; 26. First through hole; 27. Third shaft seat; 28. D-shaped hole; 29. ​​Second through hole; 30. Second gear shaft; 31. First slot; 32. E-type buckle; 33. Positioning post; 34. Mounting post; 35. Positioning hole; 36. Mounting hole;

[0037] S1, first position; S2, second position. Detailed Implementation

[0038] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many other different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0039] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0040] In the description of this utility model, unless otherwise defined, 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 utility model pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0041] In the description of this utility model, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0042] like Figure 1-10As shown, an embodiment of this utility model provides a gear clutch mechanism for a lock, including a housing body 1, an output gear 2, a planetary gear swing arm mechanism 3, and a drive component 4. The housing body 1 includes an upper housing cover 5 and a lower housing 6. The upper housing cover 5 is fastened to the lower housing 6, and the upper housing cover 5 closes the lower housing 6 to form a receiving cavity 7. The output gear 2 is rotatably installed in the receiving cavity 7. An opening slot 8 is provided on one side of the lower housing 6. The gear teeth 18 of the output gear 2 extend radially out of the opening slot 8, and the output gear 2 outputs power through the gear teeth 18 protruding from the opening slot 8. The planetary gear swing arm mechanism 3 is swingably installed in the receiving cavity 7. The planetary gear swing arm mechanism 3 includes a drive gear 9, a planet carrier 10, a first planetary gear 11, and a second planetary gear 12. The drive gear 9 is rotatably installed at the center of the planet carrier 10. The first planetary gear 11 and the second planetary gear 12 are both rotatably installed on the planet carrier 10. Planetary gears 12 are symmetrically located on both sides of the driving gear 9. The driving gear 9 meshes with the first planetary gear 11 and the second planetary gear 12 respectively. The driving component 4 is fastened to the bottom side of the lower housing 6. The output shaft 13 of the driving component 4 extends into the receiving cavity 7. The output shaft 13 engages with and drives the driving gear 9. The driving component 4 drives the driving gear 9 in the forward direction. The planetary gear swing arm mechanism 3 swings to the first position S1, so that the first planetary gear 11 meshes with the output gear 2. The driving component 4 drives the driving gear 9 in the reverse direction. The planetary gear swing arm mechanism 3 swings to the second position S2, so that the second planetary gear 12 meshes with the output gear 2. The upper housing cover 5 is provided with a first limiting part 14 and a second limiting part 15. When the planetary mechanism swings to the first position S1, the first limiting part 14 abuts against the first end face 16 of the planetary carrier 10. When the planetary mechanism swings to the second position S2, the second limiting part 15 abuts against the second end face 17 of the planetary carrier 10. This clutch mechanism drives the planetary gear swing arm mechanism 3 to swing and engage the output gear 2 through the drive component 4. The output gear 2 can drive the lock tongue to move in and out, thereby realizing the opening and closing action. The overall structure of this clutch mechanism is relatively simple, the manufacturing cost is low, and the clutch is reliable.

[0043] Specifically, the upper cover 5 is a plate structure, and the lower cover 6 is a rectangular shell structure. The upper cover 5 is fitted onto the lower cover 6 to form a receiving cavity 7. The planetary gear swing arm mechanism 3 and the output gear 2 are both installed in the receiving cavity 7. The planetary gear swing arm mechanism 3 can swing to a first position S1 and a second position S2. To facilitate the transmission connection between the output gear 2 and external components (such as the latch assembly), an opening slot 8 is provided on one side of the lower cover 6. The gear teeth 18 of the output gear 2 extend outward from the opening slot 8 to facilitate the connection between the output gear 2 and the latch transmission assembly. The planetary gear swing arm mechanism 3 includes a planet carrier 10, a driving gear 9, a first planetary gear 11, and a second planetary gear 12. The first planetary gear 11 and the second planetary gear 12 have the same structure. The planet carrier 10 is similar to a V-shaped structure, with its V-shaped opening facing the output gear 2, which can shorten the swing stroke of the planetary gear swing arm mechanism 3. More specifically, the driving gear 9 is rotatably mounted at the center of the included angle of the V-shape. The first planetary gear 11 and the second planetary gear 12 are symmetrically arranged and mounted at both ends of the V-shape. The driving gear 9 meshes with both the first planetary gear 11 and the second planetary gear 12, so that when the driving gear 9 rotates, both the first planetary gear 11 and the second planetary gear 12 rotate in the same direction. In this embodiment, the driving component 4 is a geared motor, and the output shaft 13 of the geared motor is rigidly connected to the driving gear 9. The geared motor can be controlled to rotate forward and backward via a microchip. Normally, forward rotation of the geared motor is set to lock the device, and reverse rotation is set to unlock the device. More specifically, when the geared motor rotates, it drives the driving gear 9 to rotate. The rotation of the driving gear 9 generates a certain frictional force and inertial force on the planetary carrier 10, causing the planetary gears to rotate together with the planetary carrier 10. When the planetary gears mesh with the output gear 2, the power of the driving gear 9 is output to the output gear 2 through the planetary gears, thereby realizing the power output of the output gear 2. It should be noted that when the geared motor rotates in the forward direction, the friction and inertia between the driving gear 9 and the planetary carrier 10 cause the planetary carrier 10 to swing towards the first position S1. When the planetary carrier 10 swings to the first position S1, the first planetary gear 11 engages the output gear 2, and the power of the driving gear 9 is output to the output gear 2 via the second planetary gear 12, realizing the locking action. When the geared motor rotates in the reverse direction, the friction and inertia between the driving gear 9 and the planetary carrier 10 cause the planetary carrier 10 to swing towards the second position S2. When the planetary carrier 10 swings to the second position S2, the second planetary gear 12 engages the output gear 2, and the power of the driving gear 9 is output to the output gear 2 via the second planetary gear 12, realizing the unlocking action. Obviously, if neither the first planetary gear 11 nor the second planetary gear 12 engages the output gear 2, the planetary gear swing arm mechanism 3 is in an idle or disengaged state.

[0044] Furthermore, in this embodiment, to limit the excessive rotation of the planetary gear swing arm mechanism 3 and prevent gear jamming, a first limiting part 14 and a second limiting part 15 are respectively provided on the inner side of the upper cover 5 corresponding to the first position S1 and the second position S2 of the planetary carrier 10 rotation. The first limiting part 14 and the second limiting part 15 are limiting protrusions or limiting posts. When the planetary carrier 10 rotates to the first position S1, the first limiting part 14 abuts against the first end face 16 of the planetary carrier 10, and the planetary carrier 10 cannot rotate further and stops. When the planetary carrier 10 rotates to the second position S2, the second limiting part 15 abuts against the second end face 17 of the planetary carrier 10, and the planetary carrier 10 cannot rotate further and stops. By setting the first limiting part 14 and the second limiting part 15 to limit the rotation of the planetary carrier 10, it is prevented that excessive rotation of the planetary carrier 10 will cause jamming when the first planetary gear 11 and the second planetary gear 12 mesh with the output gear 2, resulting in transmission failure.

[0045] Furthermore, in this embodiment, a first mounting seat 19 is provided on the inner bottom surface of the lower housing 6, and the first mounting seat 19 is adapted to rotatably mount the output gear 2. Specifically, in order to facilitate the rotatable mounting of the output gear 2 in the receiving cavity 7, a first mounting seat 19 is provided on the inner bottom surface of the lower housing 6, and a first bearing seat 20 is formed in the first mounting seat 19. A second bearing seat 21 is provided on the inner side surface of the upper housing cover 5. The output gear 2 is rotatably mounted and connected to the first bearing seat 20 and the second bearing seat 21 through a first gear shaft 22. The first gear shaft 22 passes through the center of the output gear 2 and forms a rigid connection with the output gear 2. The lower end of the first gear shaft 22 is rotatably embedded in the first bearing seat 20 for mounting, and the upper end of the first gear shaft 22 is rotatably embedded in the second bearing seat 21 for mounting.

[0046] Furthermore, in this embodiment, a limiting ring 23 is formed on the first mounting base 19, and a stabilizing ring 24 is provided on one end face of the output gear 2. The stabilizing ring 24 is nested within the limiting ring 23, and the stabilizing ring 24 is limited by the limiting ring 23, thereby enabling the output gear 2 to rotate stably. Specifically, in order to enable the output gear 2 to rotate stably within the receiving cavity 7, a limiting ring 23 is provided on the first mounting base 19, and a stabilizing ring 24 is provided on the lower end face of the output gear 2. Both the limiting ring 23 and the stabilizing ring 24 are annular protrusions. The inner diameter of the limiting ring 23 is adapted to the inner diameter of the stabilizing ring 24, so that the stabilizing ring 24 can be nested within the limiting ring 23, and the output gear 2 can rotate with low resistance without wobbling.

[0047] Furthermore, in this embodiment, a second mounting base 25 is provided on the bottom surface of the lower housing 6, and the drive component 4 is securely mounted in the second mounting base 25. The output shaft 13 passes through the lower housing 6 and extends into the receiving cavity 7. Specifically, in order to facilitate the fixed installation and power transmission of the geared motor, a second mounting base 25 is provided on the bottom surface of the lower housing 6. The second mounting base 25 can accommodate the geared motor, and the second mounting base 25 can be fitted with fastening screws to securely install the geared motor. The second mounting base 25 is provided with a first through hole 26, and the inner side of the upper shell cover 5 is also provided with a third shaft seat 27. The output shaft 13 passes through the first through hole 26 and is rigidly connected to the drive gear 9. The upper end of the output shaft 13 is rotatably connected to the third shaft seat 27. When the geared motor drives the output shaft 13 to rotate, the geared motor drives the drive gear 9 to rotate together. The drive gear 9 drives the first planetary gear 11 and the second planetary gear 12 to rotate simultaneously. Power is output synchronously from the first planetary gear 11 and the second planetary gear 12. At the same time, the planet carrier 10 swings, and the first planetary gear 11 or the second planetary gear 12 engages the output gear 2 individually, thereby realizing the power transmission from the geared motor to the output gear 2. Preferably, in this embodiment, the output shaft 13 is formed as a D-shaped shaft, the drive gear 9 is formed with a D-shaped hole 28, and the planet carrier 10 is provided with a second through hole 29. The output shaft 13 passes through the D-shaped hole 28 and is first rigidly connected to the drive gear 9. Then, the upper end of the output shaft 13 passes through the second through hole 29 and is installed and connected to the third shaft seat 27. The output shaft 13 is tightly fitted with the second through hole 29, and the output shaft 13 can rotate within the second through hole 29.

[0048] Furthermore, in this embodiment, both the first planetary gear 11 and the second planetary gear 12 are equipped with second gear shafts 30 and are rotatably mounted on the planet carrier 10. A first slot 31 is provided at the upper end of the second gear shaft 30, and an E-type buckle 32 is adapted to engage the second gear shaft 30 onto the planet carrier 10. Specifically, to facilitate the rotatable mounting of the planetary gears onto the planet carrier 10, both the first planetary gear 11 and the second planetary gear 12 are equipped with second gear shafts 30. A first slot 31 is provided at the upper end of the second gear shaft 30, and an E-type buckle 32 is adapted to engage the second gear shaft 30 with the planet carrier 10. The two planetary gears are rigidly connected to the second gear shafts 30 respectively. Thus, under the action of the driving gear 9, the second gear shaft 30 can overcome the resistance of the E-type and rotate, thereby realizing the power transmission of the planetary gears. It should be noted that in actual product applications, when installing the E-type buckle 32, applying some grease to the first slot 31 can improve the smoothness of the rotation of the second gear shaft 30. Preferably, in some embodiments, the planetary gear can also be configured with a bearing to rotatably connect with the second gear shaft 30, which can effectively improve the smoothness of the planetary gear power transmission and reduce transmission resistance.

[0049] Furthermore, in this embodiment, the lower housing 6 is provided with positioning posts 33 and mounting posts 34, and the upper housing cover 5 is provided with positioning holes 35 and mounting holes 36. The positioning posts 33 are fitted into the positioning holes 35 to position and install the upper housing cover 5, and the mounting posts 34 are fitted into the mounting holes 36 to securely install the upper housing cover 5. Specifically, to facilitate the secure installation of the lower housing 6 and the upper housing cover 5, four mounting posts 34 are evenly arranged on the lower housing 6, and two positioning posts 33 are arranged obliquely on the lower housing 6. The upper housing cover 5 is provided with mounting holes 36 corresponding to the mounting posts 34, and positioning holes 35 corresponding to the positioning posts 33 are provided on the upper housing cover 5. Screws pass through the mounting holes 36 and are securely connected to the mounting posts 34, thereby securing the upper housing cover 5 to the lower housing 6. The positioning posts 33 are embedded in the positioning holes 35, and the obliquely arranged positioning posts 33 can play a foolproof role, avoiding incorrect installation direction of the upper housing cover 5 and effectively improving installation efficiency.

[0050] Furthermore, when the gear clutch mechanism of this embodiment is applied to smart door locks or other locks, the output gear 2 meshes with the bolt mechanism (not shown), and the output gear 2 is driven in both directions by the reduction motor through the planetary gear swing arm mechanism 3, thereby realizing the bolt engaging and disengaging, and realizing the locking and unlocking action of the smart door lock. The bolt transmission structure of the smart door lock is simpler, the manufacturing cost is lower, and it has a better market prospect.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A gear clutch mechanism for a lock, characterized by, include: The shell body includes an upper shell cover and a lower shell, the upper shell cover is fastened to the lower shell, and the upper shell cover closes the lower shell to form a receiving cavity; An output gear is rotatably mounted in the receiving cavity. An opening slot is provided on one side of the lower housing. The teeth of the output gear extend radially out of the opening slot, and the output gear outputs power through the teeth protruding from the opening slot. A planetary gear swing arm mechanism is oscillatingly mounted within the receiving cavity. The planetary gear swing arm mechanism includes a driving gear, a planet carrier, a first planetary gear, and a second planetary gear. The driving gear is rotatably mounted at the center of the planet carrier. The first planetary gear and the second planetary gear are rotatably mounted on the planet carrier. The first planetary gear and the second planetary gear are symmetrically located on both sides of the driving gear. The driving gear meshes with both the first planetary gear and the second planetary gear for transmission. A drive component is fastened to the bottom side of the lower housing, and the output shaft of the drive component extends into the receiving cavity, the output shaft engaging and driving the drive gear; The driving component drives the driving gear in the forward direction, and the planetary gear swing arm mechanism swings to the first position so that the first planetary gear meshes with the output gear for transmission. The driving component drives the driving gear in the opposite direction, and the planetary gear swing arm mechanism swings to the second position so that the second planetary gear meshes with the output gear for transmission. The upper shell cover is provided with a first limiting part and a second limiting part. When the planetary mechanism swings to the first position, the first limiting part abuts against the first end face of the planetary carrier. When the planetary mechanism swings to the second position, the second limiting part abuts against the second end face of the planetary carrier.

2. The gear clutch mechanism for a lock as defined in claim 1, wherein The inner bottom surface of the lower housing is provided with a first mounting seat, which is adapted to be rotatably mounted on the output gear.

3. The gear clutch mechanism for a lock as defined in claim 2, wherein A first bearing seat is formed inside the first mounting base, and a second bearing seat is provided on the inner side of the upper shell cover. The output gear is rotatably connected to the first bearing seat and the second bearing seat through a first gear shaft.

4. The gear clutch mechanism for a lock as defined in claim 2, wherein A limiting ring is formed on the first mounting base, and a stabilizing ring is provided on one end face of the output gear. The stabilizing ring is nested within the limiting ring and is limited by the limiting ring, thereby enabling the output gear to rotate stably.

5. The gear clutch mechanism for a lock as defined in claim 1, wherein A second mounting base is provided on the bottom side of the lower housing, the drive component is fastened in the second mounting base, and the output shaft passes through the lower housing and extends into the receiving cavity.

6. The gear clutch mechanism for a lock as defined in claim 5, wherein The second mounting base is provided with a first through hole, and the inner side of the upper shell cover is also provided with a third shaft seat. The output shaft passes through the first through hole and is rotatably mounted and connected to the third shaft seat.

7. The gear clutch mechanism for a lock as defined in claim 6, wherein The output shaft is formed as a D-shaped shaft, the drive gear is formed with a D-shaped hole, the planet carrier is provided with a second through hole, the output shaft passes through the D-shaped hole and the second through hole and is installed and connected to the third shaft seat, and the output shaft is tightly fitted with the second through hole.

8. The gear clutch mechanism for a lock as defined in claim 1, wherein Both the first planetary gear and the second planetary gear are equipped with a second gear shaft and are rotatably mounted on the planet carrier. The upper end of the second gear shaft is provided with a first slot, and the first slot is adapted with an E-type buckle to snap the second gear shaft onto the planet carrier.

9. The gear clutch mechanism for a lock as defined in claim 1, wherein The lower housing is provided with a positioning post and a mounting post, and the upper housing cover is provided with a positioning hole and a mounting hole. The positioning post is adapted to the positioning hole to install the upper housing cover, and the mounting post is adapted to the mounting hole to securely install the upper housing cover.

10. A smart door lock characterized by Includes a gear clutch mechanism for locks as described in any one of claims 1-9.

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