Reduction clutch mechanism for door lock

Abstract

The invention discloses a deceleration clutch mechanism for a door lock, comprising a base, a driving motor and a driving gear, wherein a deceleration gear, a first driven gear, a lifting gear, a damper and a second driven gear are matched between the driving gear and the driving motor, the deceleration gear is transmission-connected with the output end of the driving motor, the first driven gear, the lifting gear and the second driven gear are coaxially arranged, the second driven gear is meshed with the driving gear, the first driven gear is meshed with the deceleration gear, a lifting groove is arranged on the first driven gear, a lifting boss plugged with the lifting groove is arranged on the end surface of the lifting gear, the first driven gear and the second driven gear are respectively provided with a first matching tooth and a second matching tooth, a reset spring is also abutted between the first driven gear and the second driven gear, and the damper is arranged on one side of the lifting gear and meshed with the lifting gear. The structure is simple, the clutch operation response is rapid, the transmission structure is reliable, and the use effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of locks, and in particular to a speed reduction clutch mechanism for a door lock. Background Art

[0002] In the existing smart lock or electronic door lock product system, the motor structure is an extremely critical component, which shoulders the heavy responsibility of realizing automatic unlocking and locking actions. When the user issues an unlocking command through fingerprint recognition, password input, card swiping, etc., the motor responds quickly, converts electrical energy into mechanical energy, drives the relevant components to operate, and easily completes the unlocking or locking operation, greatly improving the user's convenient experience. However, in order to ensure the safety of the use of smart locks and to deal with special situations such as battery exhaustion and emergency unlocking, it is particularly necessary to set a clutch mechanism on the transmission structure of the motor. In normal state, the clutch mechanism ensures the smooth transmission of motor power; in emergency, it can quickly cut off or reconnect power to avoid safety hazards caused by abnormal conditions, and ensure that the door lock can be opened by external force. Many existing clutch devices rely on inertial force to achieve clutch, rely on their large devices and high output speed to achieve separation, but in locks, they usually need to be decelerated, which makes clutching difficult in the lock structure.

[0003] For example, the authorized patent with patent number CN201811525522.8, entitled "Ball clutch structure for door closers", discloses a clutch structure. However, this clutch structure, like the common clutch structures on the market, requires controlling and increasing external force to separate the clutch structure during the clutch process. This causes the clutch to react slowly and there is a certain delay. In addition, the overall structure is relatively cumbersome, which is not conducive to space utilization and affects the user experience. The structural assembly is also cumbersome, which affects the production and processing efficiency and is not conducive to improving the economic benefits of the product. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a deceleration clutch mechanism for a door lock, which has a simple structure, rapid clutch operation response, reliable transmission structure and good use effect.

[0005] To achieve the above-mentioned purpose, the present invention provides a deceleration clutch mechanism for a door lock, comprising a base, a driving motor and a driving gear for driving a main lock tongue, a gear set is matched between the driving gear and the driving motor, the gear set comprises a reduction gear, a first driven gear, a lifting gear, a damper and a second driven gear, the reduction gear is transmission-connected to the output end of the driving motor, the first driven gear, the lifting gear and the second driven gear are coaxially arranged and rotatably connected in the base, the second driven gear is meshed with the driving gear, the first driven gear is meshed with the reduction gear, the lifting gear is arranged below the first driven gear, and a damper is arranged circumferentially on the first driven gear. A plurality of lifting grooves are arranged, and a lifting boss is arranged at the position of the lifting groove corresponding to the end surface of the lifting gear. The cross-section of the lifting boss is a trapezoidal setting with a small upper part and a large lower part. The lifting boss is inserted in the lifting groove. A first mating tooth is arranged at one end of the first driven gear facing the second driven gear, and a second mating tooth is arranged at one end of the second driven gear facing the first driven gear. The first mating tooth is meshed with the second mating tooth to form a transmission connection between the first driven gear and the second driven gear. A return spring for loosening the first mating tooth and the second mating tooth is also abutted between the first driven gear and the second driven gear. The damper is arranged on one side of the lifting gear and meshed with the lifting gear.

[0006] The beneficial effect of such arrangement is that, when the driving motor is running, the output end of the driving motor drives the reduction gear to rotate, and the reduction gear drives the first driven gear to rotate. Since the first driven gear and the lifting gear cooperate with each other through the lifting groove and the lifting boss, the first driven gear and the lifting gear rotate synchronously, but the damper is arranged on one side of the lifting gear and meshes with it, so that the lifting gear and the first driven gear have a speed difference, so that the first driven gear slides along the side wall inclined surface of the lifting boss in the height direction and compresses the reset spring. Of course, the resistance force of the reset spring here is smaller than the component force driving the first driven gear to move in the height direction, so that The first mating tooth on the first driven gear meshes with the second mating tooth on the second driven gear to achieve transmission cooperation between the first driven gear and the second driven gear, and at the same time drive the main lock tongue to slide. When the driving motor stops running, the first driven gear stops rotating due to loss of power source, so that under the action of the reset spring, the first mating tooth and the second mating tooth are loosened, so that the second driven gear can idle, completing the overall clutch action. The clutch operation of this structure responds quickly, the structure is simple and reliable, and the layout is very reasonable, which effectively improves the reliability of the overall structure, ensures that the lock can be unlocked smoothly during emergency unlocking, ensures safe use, and has good use effect.

[0007] As a further configuration of the present invention, a connecting sleeve is provided on the end face of the first driven gear facing the second driven gear wheel, a tooth groove is provided at the end of the connecting sleeve, the first mating tooth is provided in the tooth groove, and the reset spring sleeve is provided outside the connecting sleeve.

[0008] The beneficial effect of such arrangement is that the tooth groove at the end of the connecting sleeve provides an effective protective barrier for the first matching tooth. When the gear system is running, the first matching tooth is in the tooth groove, avoiding its direct exposure to the outside, thereby greatly reducing the risk of damage to the first matching tooth due to external impact, collision or impurity intrusion, ensuring the integrity of its structure and the stability of its meshing performance, and effectively guaranteeing the reliability and accuracy of the entire transmission process. At the same time, the tooth groove also has a guiding function for the second matching tooth. In the dynamic process of gear interaction, the specific shape and size of the tooth groove can accurately guide the second matching tooth into the correct meshing position, so that it can achieve close and efficient matching with the first matching tooth. This guiding effect not only reduces the friction and jamming phenomenon during gear meshing, improves the transmission efficiency, but also reduces the noise and vibration caused by poor meshing, creating a more stable and quiet operating environment for the entire mechanical device. In addition, the reset spring sleeved outside the connecting sleeve can buffer the impact force during the gear meshing process to a certain extent, further enhancing the stability and durability of the entire structure, so that it can adapt to complex and changeable working conditions and ensure long-term stable operation of the equipment.

[0009] As a further configuration of the present invention, a matching platform is provided on the end surface of the first driven gear, the lifting groove is provided on the matching platform, and a protruding block is provided on the end of the lifting boss.

[0010] The beneficial effect of such a setting is that, by setting a matching platform on the end face of the first driven gear and arranging the lifting groove thereon, this design effectively improves the structural strength of the first driven gear at the lifting groove position. The existence of the matching platform provides additional support and reinforcement for the surrounding area of ​​the lifting groove, so that this part can better resist deformation and fatigue damage when it is subjected to the frequent lifting force of the lifting gear and the transmission torque. This not only ensures the structural integrity of the first driven gear itself, but also ensures the stability and reliability of the entire transmission system during long-term operation, reduces the possibility of failure caused by insufficient local structural strength, and thus reduces the maintenance cost and downtime of the equipment. The protruding block set at the end of the lifting boss further optimizes the stability of the transmission structure. When lifting to the maximum position, the protruding block is closely matched with the lifting groove, which can accurately limit the displacement of the first driven gear and prevent it from unnecessary shaking or offset. This close combination greatly enhances the combination stability of the lifting gear and the first driven gear at the lifting groove position, ensuring the accuracy and efficiency of power transmission. Even in the case of high-speed operation or under heavy load, the positions of the two can be kept stable, ensuring the stable operation of the structure.

[0011] As a further configuration of the present invention, a contact platform is provided on the contact surface between the lifting gear and the first driven gear, the diameter of the contact platform is larger than the diameter of the lifting gear, and the lifting bosses are arranged on the contact platform at intervals.

[0012] The beneficial effects of this arrangement are as follows: With this arrangement, since the diameter of the contact table is larger than the diameter of the lifting gear, the contact area between the two is greatly increased. First, a larger contact area can make the force distribution more even. When the lifting gear is running and interacting with the first driven gear, it will not cause excessive wear due to excessive local force, thereby significantly extending the service life of the gear. Secondly, during the transmission process, a larger contact area can effectively reduce the vibration and noise caused by poor tooth surface contact, ensure the smooth operation of the entire transmission system, reduce noise interference during equipment operation, and improve the comfort of equipment use and the quietness of the working environment. This structure is simple and easy to produce and process. It provides a solid and reliable foundation for achieving precise mechanical movements, enhances the ability of the equipment to work continuously and stably under complex working conditions, reduces the occurrence of failures due to unstable transmission, and improves the reliability and durability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0014] Figure 2 is a schematic cross-sectional structure diagram of the position of a gear set according to an embodiment of the present invention;

[0015] Figure 3is a schematic structural diagram of a first driven gear in an embodiment of the present invention;

[0016] Figure 4 This is a schematic diagram of the structure of the lifting gear in an embodiment of the present invention;

[0017] Figure 5 It is a schematic diagram of the assembly structure of the lifting gear and the first driven gear in an embodiment of the present invention;

[0018] Figure 6 Schematic diagram of the structure of the second driven gear in an embodiment of the present invention.

[0019] Base 1; driving gear 2; driving motor 3; reduction gear 4; first driven gear 5; matching platform 51; lifting groove 52; connecting sleeve 53; first matching tooth 54; second driven gear 6; second matching tooth 61; lifting gear 7; lifting boss 71; protruding block 72; contact platform 73; damper 8; reset spring 9. DETAILED DESCRIPTION

[0020] The present invention provides an embodiment of a deceleration clutch mechanism for a door lock, such as Figures 1 to 6As shown, it includes a base 1, a driving motor 3 and a driving gear 2 for driving the main lock tongue, a gear set is matched between the driving gear 2 and the driving motor 3, and the gear set includes a reduction gear 4, a first driven gear 5, a lifting gear 7, a damper 8 and a second driven gear 6, the reduction gear 4 is drivingly connected to the output end of the driving motor 3, the first driven gear 5, the lifting gear 7 and the second driven gear 6 are coaxially arranged and rotatably connected in the base 1, the second driven gear 6 is meshed with the driving gear 2, the first driven gear 5 is meshed with the reduction gear 4, the lifting gear 7 is arranged below the first driven gear 5, and a plurality of lifting grooves 52 are circumferentially arranged on the first driven gear 5, and the lifting gear 7 faces the end A lifting boss 71 is provided at the position of the lifting groove 52. The cross-section of the lifting boss 71 is a trapezoidal setting with a small upper part and a large lower part. The lifting boss 71 is inserted in the lifting groove 52. The first driven gear 5 is provided with a first matching tooth 54 at one end facing the second driven gear 6, and the second driven gear 6 is provided with a second matching tooth 61 at one end facing the first driven gear 5. The first matching tooth 54 is meshed with the second matching tooth 61 to form a transmission connection between the first driven gear 5 and the second driven gear 6. A return spring 9 for loosening the first matching tooth 54 and the second matching tooth 61 is also provided between the first driven gear 5 and the second driven gear 6. The damper 8 is provided on one side of the lifting gear 7 and meshed with the lifting gear 7. The beneficial effect of such arrangement is as follows: when the driving motor 3 is running, the output end of the driving motor 3 drives the reduction gear 4 to rotate, and the reduction gear 4 drives the first driven gear 5 to rotate. Since the first driven gear 5 and the lifting gear 7 cooperate with each other through the lifting groove 52 and the lifting boss 71, the first driven gear 5 and the lifting gear 7 rotate synchronously, but the damper 8 is arranged on one side of the lifting gear 7 and meshes with it, so that the lifting gear 7 and the first driven gear 5 have a speed difference, so that the first driven gear 5 slides in the height direction along the side wall inclined surface of the lifting boss 71 and compresses the reset spring 9. Of course, the resistance force of the reset spring 9 here is smaller than the component force driving the first driven gear 5 to move in the height direction. Thereby, the first mating tooth 54 on the first driven gear 5 is meshed with the second mating tooth 61 of the second driven gear 6, thereby realizing the transmission cooperation between the first driven gear 5 and the second driven gear 6, and driving the main lock tongue to slide. When the driving motor 3 stops running, the first driven gear 5 stops rotating due to the loss of power source, so that the first mating tooth 54 and the second mating tooth 61 are loosened under the action of the reset spring 9, so that the second driven gear 6 can idle and complete the overall clutch action. The clutch operation of this structure responds quickly, the structure is simple and reliable, and the layout is also very reasonable, which effectively improves the reliability of the overall structure, ensures that the lock can be unlocked smoothly during emergency unlocking, ensures safe use, and has a good use effect.

[0021] As a further configuration of this embodiment, a connecting sleeve 53 is provided on the end surface of the first driven gear 5 facing the second driven gear wheel, a tooth groove is provided at the end of the connecting sleeve 53, the first mating tooth 54 is provided in the tooth groove, and the reset spring 9 is sleeved outside the connecting sleeve 53. The beneficial effect of such configuration is that the tooth groove at the end of the connecting sleeve 53 provides an effective protective barrier for the first mating tooth 54, and when the gear system is running, the first mating tooth 54 is in the tooth groove, avoiding its direct exposure to the outside, thereby greatly reducing the risk of the first mating tooth 54 being damaged due to external impact, collision or impurity intrusion, ensuring the integrity of its structure and the stability of the meshing performance, and effectively guaranteeing the reliability and accuracy of the entire transmission process. At the same time, the tooth groove also has a guiding function for the second mating tooth 61. In the dynamic process of gear interaction, the specific shape and size of the tooth groove can accurately guide the second mating tooth 61 into the correct meshing position, so that it can achieve close and efficient fit with the first mating tooth 54. This guiding effect not only reduces the friction and jamming during gear meshing, improves the transmission efficiency, but also reduces the noise and vibration caused by poor meshing, creating a more stable and quiet operating environment for the entire mechanical device. In addition, the reset spring 9 mounted outside the connecting sleeve 53 can buffer the impact force during the gear meshing process to a certain extent, further enhancing the stability and durability of the entire structure, enabling it to adapt to complex and changeable working conditions and ensure long-term stable operation of the equipment.

[0022] As a further configuration of this embodiment, a matching platform 51 is provided on the end face of the first driven gear 5, the lifting groove 52 is provided on the matching platform 51, and a protruding block 72 is provided at the end of the lifting boss 71. The beneficial effect of such a configuration is that, by providing the matching platform 51 on the end face of the first driven gear 5 and arranging the lifting groove 52 thereon, this design effectively improves the structural strength of the first driven gear 5 at the position of the lifting groove 52. The existence of the matching platform 51 provides additional support and reinforcement for the surrounding area of ​​the lifting groove 52, so that this part can better resist deformation and fatigue damage when it is subjected to the frequent lifting force of the lifting gear 7 and the transmission torque. This not only ensures the structural integrity of the first driven gear 5 itself, but also ensures the stability and reliability of the entire transmission system during long-term operation, reduces the possibility of failure caused by insufficient local structural strength, and thus reduces the maintenance cost and downtime of the equipment. The protruding block 72 provided at the end of the lifting boss 71 further optimizes the stability of the transmission structure. When the lifting is at the maximum position, the protruding block 72 and the lifting slot 52 are closely matched, which can accurately limit the displacement of the first driven gear 5 and prevent it from unnecessary shaking or deviation. This close combination greatly enhances the stability of the combination of the lifting gear 7 and the first driven gear 5 in the lifting slot 52, ensuring the accuracy and efficiency of power transmission. Even in the case of high-speed operation or heavy load, the positions of the two can be kept stable, ensuring the stable operation of the structure.

[0023] As a further configuration of this embodiment, a contact platform 73 is provided on the contact surface between the lifting gear 7 and the first driven gear 5, and the diameter of the contact platform 73 is larger than the diameter of the lifting gear 7, and the lifting boss 71 is arranged on the contact platform 73 at intervals. The beneficial effect of this configuration is that, since the diameter of the contact platform 73 is larger than the diameter of the lifting gear 7, the contact area between the two is greatly increased. First, a larger contact area can make the force distribution more uniform. When the lifting gear 7 is running and interacting with the first driven gear 5, excessive wear will not occur due to excessive local force, thereby significantly extending the service life of the gear. Secondly, during the transmission process, a larger contact area can effectively reduce the vibration and noise caused by poor contact of the tooth surface, ensure the smooth operation of the entire transmission system, reduce noise interference during the operation of the equipment, and improve the comfort of the equipment and the quietness of the working environment. This structure is simple and easy to produce and process, providing a solid and reliable foundation for achieving precise mechanical action, enhancing the ability of the equipment to work continuously and stably under complex working conditions, reducing the failure rate caused by unstable transmission, and improving the reliability and durability of the equipment.

[0024] The above example is only one of the preferred specific examples of the present invention. The common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A deceleration clutch mechanism for a door lock, comprising a base, a drive motor and a drive gear for driving a main lock tongue, characterized in that: A gear set is provided between the driving gear and the driving motor, and the gear set includes a reduction gear, a first driven gear, a lifting gear, a damper and a second driven gear. The reduction gear is transmission-connected to the output end of the driving motor. The first driven gear, the lifting gear and the second driven gear are coaxially arranged and rotationally connected in the base. The second driven gear is meshed with the driving gear, and the first driven gear is meshed with the reduction gear. The lifting gear is arranged below the first driven gear. A plurality of lifting grooves are circumferentially arranged on the first driven gear, and a plurality of lifting grooves are arranged on the end surface of the lifting gear corresponding to the lifting grooves. A lifting boss, the cross-section of the lifting boss is a trapezoidal setting with a small upper part and a large lower part, the lifting boss is inserted in the lifting groove, the first driven gear is provided with a first matching tooth at one end facing the second driven gear, and the second driven gear is provided with a second matching tooth at one end facing the first driven gear, the first matching tooth is meshed with the second matching tooth to form a transmission connection between the first driven gear and the second driven gear, and a return spring for loosening the first matching tooth and the second matching tooth is also provided between the first driven gear and the second driven gear, and the damper is arranged on one side of the lifting gear and meshed with the lifting gear.

2. The deceleration clutch mechanism for a door lock according to claim 1, characterized in that: The end surface of the first driven gear facing the second driven gear is provided with a connecting sleeve, the end of the connecting sleeve is provided with a tooth groove, the first matching tooth is provided in the tooth groove, and the return spring sleeve is provided outside the connecting sleeve.

3. The deceleration clutch mechanism for a door lock according to claim 1, characterized in that: A matching platform is arranged on the end surface of the first driven gear, the lifting groove is arranged on the matching platform, and a protruding block is arranged on the end of the lifting boss.

4. The deceleration clutch mechanism for a door lock according to claim 3, characterized in that: A contact platform is arranged on the contact surface between the lifting gear and the first driven gear. The diameter of the contact platform is larger than the diameter of the lifting gear. The lifting bosses are arranged on the contact platform at intervals.

Images