Door lock drive output shaft, door lock drive device and intelligent door lock

Abstract

The present invention discloses a door lock drive output shaft, a door lock drive device and an intelligent door lock. A door lock drive device comprises an actuator and an output assembly; the output assembly comprises an output gear and an output shaft; the output gear comprises a bushing and a gear ring, and a friction portion is provided between the bushing and the gear ring; the output shaft is provided in the bushing, and the output shaft has a connecting cavity for cooperating with the lock core shaft, and an elastic portion with radial elastic force is provided in the connecting cavity. The door lock drive device of the present invention can easily make the output shaft and the lock core shaft concentric or nearly concentric during the installation and debugging of the door lock; when the output shaft and the lock core shaft are misaligned, the elastic force of the elastic portion can ensure that the two shafts can be stably connected, and the torque transmission efficiency is high. Even when there is an excessive torque output, when it is greater than the critical value of the friction force, relative sliding occurs between the bushing and the gear ring to avoid tooth knocking or even breakage and jamming.

Description

Technical Field

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

[0002] At present, most of the fully automatic smart door locks, such as the Chinese invention patent, disclose a fully automatic smart lock, including a housing, a circuit board, a gear box and a direct drive clutch mechanism; the circuit board is installed at the upper end of the housing, and the circuit board is provided with an MCU control unit, a gyroscope sensor and an acceleration sensor; the gear box is fixed at the lower end of the housing, and the direct drive clutch mechanism is arranged in the gear box; the direct drive clutch mechanism includes a motor drive dial, a motor, a clutch, a spring, a first transmission gear, a dial, a lock cylinder, a second transmission gear, a lock cylinder connecting rod and a handle; a Hall sensor is also arranged on the circuit board, and the Hall sensor is arranged in the gear box, and the Hall sensor is arranged on one side of the motor drive dial, and the Hall sensor is used to accurately control the number of revolutions of the motor. The electronic program is mainly used to control the number of revolutions of the motor to avoid excessive rotation causing stalling and causing damage to the motor.

[0003] However, in actual use, electronic program control requires sensors such as Hall sensors to collect and feedback position signals and control the shutdown of the motor accordingly. This not only makes the overall cost of the door lock high, but also the sensor is easily affected by the surrounding environment. For example, the Hall element is easily affected by the magnetic field and temperature, and there are problems of performance degradation or offset. In existing purely mechanically controlled drive devices, the torque output by the motor itself fluctuates, and there will be losses in the transmission through the input and output components. Generally, after the lock tongue reaches the limit position, the motor will continue to input working current for a few seconds to ensure that the lock tongue rotates in place to avoid the lock tongue from not rotating in place and failing to unlock. However, if this continues for a long time, the probability of the motor being blocked increases, and there is a risk of gear teeth being worn. Moreover, whether it is a purely mechanical control method or a mechanical combined with electronic program control method, in order to facilitate the installation and debugging of the door lock, the shaft hole of the drive output shaft and the lock core shaft are matched with a clearance greater than 0, generally a clearance of 1-2mm. During the specific installation and debugging process, since the shaft hole is hollow, it is difficult to objectively and intuitively reflect the center point of the shaft hole. Even if the installers perform repeated debugging, it is difficult to ensure the concentricity of the output shaft and the lock core shaft. After installation and debugging, the lock core shaft is suspended without support. Affected by gravity, the movable lock core shaft will sag to form a seesaw shape, and the vibration caused by long-term opening and closing of the door further aggravates the problem of poor concentricity, resulting in a decrease in the torque transmission efficiency of the drive device. In this way, in order to drive the lock core shaft to rotate into place, the current must be increased. For the drive device with pure mechanical control, the probability of stalling, tooth wear, and even tooth breakage will be further aggravated, and the service life will be significantly shortened. In addition, increasing the current is prone to generate loud noise. Moreover, the door frame and the door may be misaligned due to installation or long-term use, and the lock requires a larger torque to open and close normally. To meet daily use, the maximum torque of the drive motor is 6 to 7 times greater than the working torque, which accelerates the possibility of tooth breakage and significantly reduces the service life of the door lock drive device. Summary of the invention

[0004] Based on this, it is necessary to address the above technical problems, and the present invention provides a door lock drive output shaft, a door lock drive device and a smart door lock.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] In a first aspect, a door lock driving device comprises:

[0007] An actuator for providing a rotational driving force;

[0008] An output assembly, which is in driving connection with the actuator; the output assembly comprises an output gear and an output shaft;

[0009] The output gear includes a bushing and a gear ring sleeved on the bushing, and a friction portion is provided between the bushing and the gear ring to transmit torque through the friction force between the bushing and the gear ring;

[0010] The output shaft is arranged in the bushing, and the output shaft has a connecting cavity for being matched and connected with the lock core shaft, and an elastic part with radial elastic force is arranged in the connecting cavity.

[0011] As a preferred implementation of the door lock drive device provided by the present invention, the friction portion is a C-type or C-type-like friction portion.

[0012] As a preferred embodiment of the door lock driving device provided by the present invention, one or more protrusions are provided on the friction portion to adjust the friction force between the bushing and the gear ring.

[0013] As a preferred embodiment of the door lock driving device provided by the present invention, the bushing or the gear ring is provided with a groove for supporting the friction part.

[0014] As a preferred implementation of the door lock driving device provided by the present invention, the elastic force of the elastic part gradually increases from the end to the middle of the connecting cavity.

[0015] As a preferred embodiment of the door lock driving device provided by the present invention, the elastic portion includes an elastic sheet arranged axially along the shaft hole.

[0016] As a preferred implementation of the door lock drive device provided by the present invention, a clutch is provided between the output shaft and the bushing.

[0017] As a preferred embodiment of the door lock drive device provided by the present invention, the door lock drive device also includes a housing and an input component, the actuator is transmission-connected to the output component via the input component, and the output component and the input component are arranged in the housing; one end of the output component facing the lock core shaft is connected to the housing via a rolling bearing, and the other end is connected to the housing via a sliding bearing.

[0018] In a second aspect, a smart door lock includes the above-mentioned door lock drive device, and also includes a lock core and a knob, wherein the lock core and the knob are both drivingly connected to both ends of the output shaft of the door lock drive device.

[0019] In a third aspect, a door lock drive output shaft comprises an output shaft for connecting the lock core shaft, the output shaft having a connecting cavity and a plurality of elastic parts arranged on the cavity wall of the connecting cavity, the elastic force direction of each elastic part being the radial direction of the output shaft.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The door lock drive device provided by the present invention, through the mutual cooperation of the output gear with the friction part and the output shaft with the elastic part, well solves the problem that the prior art door lock installation and debugging requires deliberate repeated debugging but still cannot ensure the concentricity effect of the output shaft and the lock core shaft, and the gravity and the vibration of long-term door opening and closing aggravate the problem of poor concentricity, which leads to the reduction of the torque transmission efficiency of the drive device, so the current is increased but it is easy to generate large noise; it also solves the existing door frame and door due to installation or long-term use. There will be misalignment, the output shaft and the lock core shaft are not connected stably, and the lock buckle needs a larger torque to work normally. To meet daily use, the maximum torque of the drive motor is 6 to 7 times larger than the working torque, that is, it is still necessary to increase the current, so as to accelerate the possibility of broken teeth and significantly reduce the service life of the door lock drive device. In addition, the present invention is a purely mechanical control method, low cost, not affected by the environment, and will not cause misoperation due to extreme weather.

[0022] Specifically, by adding an elastic part in the connecting cavity of the output shaft, when the lock core shaft is inserted into the connecting cavity, the elastic force of the elastic part on the lock core shaft makes the lock core shaft have a self-adjusting function relative to the connecting cavity. It is easy to make the output shaft and the lock core shaft concentric or nearly concentric during installation and debugging of the door lock, thereby improving the installation efficiency. When the door lock is installed and used, the door frame and the door may be misaligned due to installation or long-term use. That is, when the output shaft and the lock core shaft are misaligned, the elastic force of the elastic part can ensure that the two shafts can be stably connected, and the torque transmission efficiency is high. Even when there is excessive torque output, since the friction part is added between the bushing and the gear ring in this embodiment, the bushing, the friction part and the gear ring transmit torque to each other through friction. When the external torque is greater than the critical value of the friction force, relative sliding occurs between the bushing and the gear ring, that is, it is ensured that there is an upper limit of torque for gear transmission, avoiding tooth clashing or even breakage and jamming. When the lock tongue reaches the limit position, it will stop rotating, that is, the lock core shaft will also stop rotating, and the output shaft will also stop rotating accordingly. Although the motor continues to be energized to ensure that the lock core shaft rotates into place, the output shaft and the gear ring will slide relative to each other, thereby preventing the motor from stalling and avoiding the problem of tooth wear or tooth breakage caused by the instantaneous force of the driving motor.

[0023] 2. The present invention also provides a door lock drive output shaft, which adds an elastic part in the connecting cavity. When the lock core shaft is inserted into the connecting cavity, the elastic force of the elastic part on the lock core shaft makes the lock core shaft have a self-adjusting function relative to the connecting cavity. When the door lock is installed and used, if the output shaft is misaligned with the lock core shaft, the elastic force of the elastic part can ensure that the two shafts can be stably connected. Moreover, when installing and debugging the door lock, it is easy to make the output shaft and the lock core shaft concentric or nearly concentric, which improves the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the solutions in the present application or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of the structure of the door lock drive output shaft in Embodiment 1 of the present invention;

[0026] Figure 2 A top view of the door lock drive output shaft in Embodiment 1 of the present invention;

[0027] Figure 3 Schematic diagram of the door lock drive output shaft in Embodiment 1 of the present invention;

[0028] Figure 4 It is a top view of the door lock drive output shaft in Embodiment 1 of the present invention, and the lock core shaft is not shown in the figure;

[0029] Figure 5 for Figure 4 A sectional stereogram at AA in the middle;

[0030] Figure 6 Schematic diagram of the structure of the door lock driving device in Embodiment 2 of the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of the front side of the door lock driving device in Embodiment 2 of the present invention, in which the front side of the housing is not shown;

[0032] Figure 8 This is a schematic structural diagram of the back side of the door lock driving device in Embodiment 2 of the present invention, wherein the back side of the housing is not shown in the figure;

[0033] Fig. 9 It is a schematic diagram of the structure of the output gear, the output shaft and the lock core shaft in Example 2 of the present invention;

[0034] Fig.10 for Fig. 9 Schematic diagram of the decomposition of

[0035] Fig.11 It is an exploded schematic diagram of the output gear and the output shaft in Embodiment 2 of the present invention;

[0036] Fig.12 A top view of the output gear and the output shaft in Embodiment 2 of the present invention;

[0037] Fig.13 for Fig.12 A cutaway stereogram of the middle BB;

[0038] Fig.14 for Fig.13 Schematic diagram of the decomposition of

[0039] Fig.15 for Fig.12 The sectional stereoscopic diagram at the middle BB shows that the output shaft and the output gear are in a disengaged state, that is, the convex position is disengaged from the concave position. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0041] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0042] Example 1

[0043] Please refer to Figure 1-5 , which shows the door lock drive output shaft 10 provided in this embodiment.

[0044] The door lock drive output shaft 10 includes an output shaft 11, which is used to connect the lock core shaft 20 of the lock body and drive the lock core shaft 20 to rotate. Furthermore, a connecting cavity 12 for connecting the lock core shaft 20 is opened in the middle of the output shaft 11, and a plurality of elastic parts 13 are arranged on the cavity wall of the connecting cavity 12, wherein the elastic force direction of each elastic part 13 is the radial direction of the output shaft 11.

[0045] Furthermore, the shape of the connecting cavity 12 matches the shape of the lock core shaft 20. When the lock core shaft 20 is square, the connecting cavity 12 is also a square cavity or a quasi-square cavity; when the lock core shaft 20 is rectangular, the connecting cavity 12 is also a rectangular cavity or a quasi-rectangular cavity. It is worth noting that other shapes are also possible.

[0046] In this embodiment, if Figure 4 As shown, the plurality of elastic parts 13 are arranged along the circumference of the connecting cavity 12. Preferably, the cavity wall of each connecting cavity 12 is provided with at least one elastic part 13, which is not only convenient for plugging the lock core shaft 20, but also further ensures the connection stability between the output shaft 11 and the lock core shaft 20 when the output shaft 11 and the lock core shaft 20 rotate synchronously.

[0047] In this embodiment, if Figure 5 As shown, each of the elastic parts 13 includes an elastic sheet 131 axially arranged along the output shaft 11. It should be noted that the elastic sheet 131 can be integrally formed on the connecting cavity 12, or connected to the connecting cavity 12 through a fixing member 132. In this embodiment, the connection mode of the fixing member 132 is taken as an example for explanation. Each of the elastic parts 13 also includes a fixing member 132, and the elastic sheet 131 is connected to the connecting cavity 12 through the fixing member 132. It can be understood that the elastic sheet 131 can be integrally formed on the fixing member 132, or can be formed by stamping the fixing member 132, or can be an independent part of the fixing member 132, that is, the fixing member 132 is used to fasten the elastic sheet 131 in the connecting cavity 12.

[0048] In this embodiment, the fixing member 132 is preferably detachably connected to the output shaft 11 , and the detachable connection mode may be hooking or clamping, or other connection modes. Such a design facilitates the disassembly and replacement of the elastic part 13 .

[0049] In order to facilitate the installation and debugging of the door lock, the connection cavity 12 and the lock core shaft 20 are clearance-matched with a clearance greater than 0, generally 1-2mm. During the installation and debugging process, the installer needs to perform repeated debugging in order to achieve the concentricity of the output shaft 11 and the lock core shaft 20; moreover, the connection cavity 12 is a cavity, and its center point is difficult to intuitively reflect, which increases the difficulty of installation and debugging concentricity. After the installation is completed, it is difficult to ensure the high concentricity of the output shaft 11 and the lock core shaft 20. In addition, the gravity and the vibration of long-term opening and closing of the door further aggravate the problem of poor concentricity, resulting in reduced torque transmission efficiency of the drive device, increased current, and easy to generate loud noise.

[0050] To solve this problem, in this embodiment, an elastic portion 13 is added to the connecting cavity 12. When the lock core shaft 20 is inserted into the connecting cavity 12, the elastic force of the elastic portion 13 on the lock core shaft 20 enables the lock core shaft 20 to have a self-adjusting function relative to the connecting cavity 12. Figure 2 When the door lock is installed and used, if the output shaft 11 is misaligned with the lock core shaft 20, the elastic force of the elastic portion 13 can ensure that the two shafts are stably connected. Moreover, when installing and debugging the door lock, there is no need to deliberately meet the requirement that the output shaft 11 and the lock core shaft 20 are concentric, which improves the installation efficiency.

[0051] Example 2

[0052] Please refer to Figure 6-15 , which shows the door lock driving device provided in this embodiment. The door lock driving device includes an actuator 30 for providing a rotational driving force and an output assembly drivingly connected to the actuator 30. The output assembly includes an output gear 40 and the door lock driving output shaft 10 as described in Example 1.

[0053] Please refer to Fig.11 , 13 The output gear 40 includes a bushing 41, a ring gear 42 and a friction portion 43; the output shaft 11 described in Example 1 is arranged in the inner cavity of the bushing 41; the ring gear 42 is sleeved on the outside of the bushing 41; the friction portion 43 is arranged between the bushing 41 and the ring gear 42 to transmit torque through the friction force of the bushing 41 and the ring gear 42.

[0054] In this embodiment, a friction portion 43 is additionally provided between the bushing 41 and the gear ring 42, so that the bushing 41, the friction portion 43 and the gear ring 42 transmit torque to each other through friction. When the external torque is greater than the critical value of the friction force, relative sliding occurs between the bushing 41 and the gear ring 42, thereby ensuring that there is an upper torque limit for gear transmission, thereby avoiding tooth knocking or even breakage and jamming.

[0055] The bushing 41 or the gear ring 42 is provided with a groove 44, which is used to carry the friction part 43. It is convenient to simplify the structure and facilitate manufacturing. Fig.11 As shown, in this embodiment, the groove 44 is preferably provided on the outside of the bushing 41 to facilitate the bearing and positioning of the friction part 43 and also facilitate assembly. In order to facilitate the assembly of the gear ring 42, further, a positioning platform 45 is provided on the bushing 41. The positioning platform 45 is preferably but not limited to being located on one side of the groove 44, such as the upper side or the lower side, so that the gear ring 42 can be carried and positioned by the positioning platform 45. During assembly, the friction part 43 is sleeved in the groove 44, and then the gear ring 42 is sleeved on the positioning platform 45, and the assembly of the output gear 40 can be completed.

[0056] In this embodiment, the friction portion 43 is a C-shaped or C-shaped structure, which is convenient for assembling and disassembling the friction portion 43 .

[0057] In this embodiment, if Fig.11 , 13 As shown in FIG. 15 , the friction portion 43 is provided with one or more protrusions 431 for adjusting the friction force between the bushing 41 and the gear ring 42. Specifically, in this embodiment, the friction portion 43 is used to adjust the matching clearance between the gear ring 42 and the bushing 41, thereby changing the radial pressure f between the gear ring 42, the friction portion 43 and the bushing 41. 径 , assuming that the friction coefficient between the bushing 41 and the friction portion 43 is μ s , then the minimum tangential force F of the relative rotation between the friction part 43 and the gear ring 42 meets the following formula: F = μ s *f 径 .

[0058] By adding a convex portion 431 to the friction portion 43, in specific implementation, the size, position and number of the convex portion 431 can be adjusted according to actual needs to adjust the matching clearance between the gear ring 42 and the bushing 41 to change the radial pressure between the gear ring 42, the friction portion 43 and the bushing 41, that is, to adjust the friction force to adjust the torque. It is understandable that the matching clearance between the gear ring 42 and / or the outer diameter of the bushing 41 can also be adjusted by adjusting the inner diameter of the gear ring 42 and / or the outer diameter of the bushing 41 to adjust the radial pressure to adjust the friction force.

[0059] It should be noted that the protrusion 431 can be arranged on the inner side of the friction portion 43, that is, the side facing the bushing 41; it can also be arranged on the outer side of the friction portion 43, that is, the side facing the ring gear 42; it is also possible that a part of the protrusion 431 is arranged on the inner side of the friction portion 43, and the other part of the protrusion 431 is arranged on the outer side of the friction portion 43.

[0060] For the convenience of manufacturing, the convex portion 431 is formed by stamping the friction portion 43. It is understandable that it can also be formed by an integral molding process.

[0061] In this embodiment, if Fig.14 As shown, a clutch 50 is provided between the output shaft 11 and the bushing 41. The clutch 50 is a concave-convex structure provided in the contact area between the output shaft 11 and the bushing 41, that is, if a concave position 51 is provided on either the output shaft 11 or the bushing 41, a convex position 52 is provided on the other correspondingly. When the convex position 52 and the concave position 51 are matched, the bushing 41 and the output shaft 11 are integrated and can rotate synchronously, that is, the automatic unlocking mode is achieved. Fig.13When the convex position 52 and the concave position 51 are dislocated, the output shaft 11 is independent of the bushing 41 and cannot rotate synchronously, that is, the manual unlocking mode, such as Fig.15 Such design can realize both manual and automatic unlocking modes to meet the needs of different customers.

[0062] Please refer to Figure 6-8 The door lock driving device further comprises a housing 60 and an input assembly, wherein the actuator 30 is in transmission connection with the output assembly through the input assembly, and the output assembly and the input assembly are arranged in the housing 60. The input assembly comprises a first gear set 70 and a second gear set 80, wherein both the first gear set 70 and the second gear set 80 can rotate relative to the housing 60; the first gear set 70 comprises a coaxially arranged helical gear 71 and a spur gear 72, wherein the helical gear 71 is in transmission connection with the driving end of the actuator 30; the second gear set 80 comprises a coaxially arranged large gear 81 and a small gear 82, wherein the large gear 81 is in transmission connection with the spur gear 72, and the small gear 82 is in transmission connection with the ring gear 42.

[0063] In this embodiment, the actuator 30 is a motor, but it is understandable that it is not limited to this. When the automatic unlocking is performed, the motor drives the helical gear 71 through the worm 31 at the driving end, drives the large gear 81 through the spur gear 72, and the small gear 82 drives the ring gear 42 to rotate, thereby driving the output shaft 11 to rotate, and the lock core shaft 20 rotates synchronously with the output shaft 11, and finally drives the lock tongue connected to the lock core shaft 20 to rotate, so as to realize automatic unlocking.

[0064] In this embodiment, one end of the bushing 41 of the output assembly facing the lock core shaft 20 is connected to the housing 60 via a rolling bearing 61, and the other end is connected to the housing 60 via a sliding bearing 62. In this way, a mixed bearing method is used to meet the use requirements and reduce costs.

[0065] The door lock drive device provided in this embodiment solves the above-mentioned technical problems well through the mutual cooperation between the output gear 40 with the friction part 43 and the output shaft 11 with the elastic part 13. It is a purely mechanical control method with low cost, is not affected by the environment, and will not cause malfunction due to extreme weather.

[0066] Specifically, by adding an elastic portion 13 in the connecting cavity 12 of the output shaft 11, when the lock core shaft 20 is inserted into the connecting cavity 12, the elastic force of the elastic portion 13 on the lock core shaft 20 enables the lock core shaft 20 to have a self-adjusting function relative to the connecting cavity 12. When installing and debugging the door lock, there is no need to deliberately meet the requirement that the output shaft 11 and the lock core shaft 20 are concentric, which improves the installation efficiency. When the door lock is installed and in use, the door frame and the door may be misaligned due to installation or long-term use. That is, when the output shaft 11 is misaligned with the lock core shaft 20, the elastic force of the elastic portion 13 can ensure that the two shafts can be stably connected, and the torque transmission efficiency is high. Even when there is excessive torque output, since the friction part 43 is added between the bushing 41 and the gear ring 42 in this embodiment, the bushing 41, the friction part 43 and the gear ring 42 transmit torque to each other through friction. When the external torque is greater than the critical value of the friction force, relative sliding occurs between the bushing 41 and the gear ring 42, that is, ensuring that there is an upper torque limit for gear transmission, avoiding tooth clashing or even breakage and jamming. When the lock tongue reaches the limit position, it will stop rotating, that is, the lock core shaft 20 will also stop rotating, and the output shaft 11 will also stop rotating accordingly. Although the motor continues to be powered on to ensure that the lock core shaft 20 rotates to the right position, the output shaft 11 and the gear ring 42 will slide relative to each other, thereby preventing the motor from being blocked and avoiding the problem of tooth clashing or tooth breakage caused by the instantaneous force of the driving motor.

[0067] Example 3

[0068] The present embodiment provides a smart door lock, which includes the door lock drive device described in Example 2, and also includes a lock core and a knob. The lock core shaft of the lock core is inserted into one end of the output shaft of the door lock drive device, namely, the connecting cavity, and the knob is connected to the other end of the output shaft. A reset spring is arranged between the knob and the shell.

[0069] When in use, during manual operation, the knob is connected to the lock core shaft through the output shaft. When the knob is pressed by hand, the reset spring is squeezed and simultaneously pushes the output shaft to move axially so that the output shaft escapes from the bushing. At this time, the output shaft and the output gear rotate asynchronously. Then, the knob is turned to drive the output shaft to rotate, and also drives the lock core shaft to rotate, and then drives the lock tongue to rotate, thereby realizing unlocking / locking. When the knob is loosened, the reset spring resets the output shaft, and the clutch hook is engaged, that is, at this time, the output shaft and the output gear rotate asynchronously. When electric operation is required, the actuator is started, and the gear ring of the output assembly is driven to rotate through the input assembly. The output shaft rotates synchronously with the gear ring, driving the lock core shaft to rotate, and then driving the lock tongue to rotate, thereby realizing unlocking / locking.

[0070] In the description of the present invention, in addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0071] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0072] In the description of the embodiments of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present invention.

[0073] In the embodiments of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0075] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific embodiments, or to perform equivalent replacements for some of the technical features therein.

Claims

1. A door lock driving device, characterized in that: It includes: An actuator for providing a rotational driving force; An output assembly, which is in driving connection with the actuator; the output assembly comprises an output gear and an output shaft; The output gear includes a bushing and a gear ring sleeved on the bushing, and a friction portion is provided between the bushing and the gear ring to transmit torque through the friction force between the bushing and the gear ring; The output shaft is arranged in the bushing, and the output shaft has a connecting cavity for being matched and connected with the lock core shaft, and an elastic part with radial elastic force is arranged in the connecting cavity; The friction part is a C-type or C-type friction part; One or more convex parts are arranged on the friction part on a side facing the gear ring, so as to adjust the friction force between the bushing and the gear ring; The bushing or the gear ring is provided with a groove, which is used to carry the friction part; The elastic portion includes an elastic sheet arranged along the axial direction of the output shaft.

2. The door lock driving device according to claim 1, characterized in that: The elastic force of the elastic part gradually increases from the end to the middle of the connecting cavity.

3. The door lock driving device according to claim 1, characterized in that: A clutch is arranged between the output shaft and the bushing.

4. The door lock driving device according to claim 1, characterized in that: The door lock drive device also includes a housing and an input component, the actuator is transmission-connected to the output component via the input component, and the output component and the input component are arranged in the housing; one end of the output component facing the lock core shaft is connected to the housing via a rolling bearing, and the other end is connected to the housing via a sliding bearing.

5. A smart door lock, characterized in that: The door lock drive device comprises the door lock drive device as described in any one of claims 1 to 4, and further comprises a lock core and a knob, wherein the lock core and the knob are both drivingly connected to the output shaft of the door lock drive device.

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