Reduction gearbox for lock

Abstract

The invention belongs to the technical field of locksets, and particularly relates to a reduction gearbox for a lockset, which comprises a box body, a driving piece arranged in the box body, a transmission piece arranged at the output end of the driving piece, and a rack connected with the transmission piece and used for driving the lockset to open and close, the transmission part comprises a plurality of transmission gears which are meshed with one another, and the transmission gears are installed in the embedded grooves with different depths in a stepped mode. The embedded grooves of different depths are formed in the box body, and the transmission gears are installed in the embedded grooves of different depths in a stepped mode, so that the size of the box body in the length direction can be reduced under the condition that large torque output of the box body is guaranteed, and then the box body can be reasonably installed in the lock conveniently.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of locks, and particularly relates to a speed reducer for a lock. BACKGROUND

[0002] In the field of locks, especially in the application scenarios of intelligent locks for power industry Internet of Things, there are special and stringent requirements for lock driving devices.

[0003] Intelligent locks for power industry Internet of Things are mainly applied to scenarios such as distribution boxes and meter boxes. These scenarios often have complex environments, and there are generally conditions such as smoke accumulation, salt spray corrosion, and high humidity. At the same time, such locks are often in a long-time unattended state, and under the influence of complex environments, rust and dust accumulation are prone to occur, which significantly increases the resistance of opening and closing the lock. Therefore, the speed reducer for the lock must have sufficient driving force to ensure that the lock tongue can smoothly extend and retract, and to ensure that the lock can reliably complete the locking and opening actions. Moreover, due to the small internal space of the lock for the power industry, and the need for the lock to adapt to various installation scenarios, strict requirements are placed on the size of the speed reducer for the lock.

[0004] However, in order to ensure that the lock can reliably complete the opening and closing actions, the speed reducer for the lock in the prior art increases the number of gear stages, but this also leads to an increase in the size of the speed reducer, which cannot adapt to the limited installation space inside the lock. If the size is simply reduced, it will result in insufficient output torque, making it difficult to meet the power requirements of the lock when locking and opening.

[0005] Therefore, there is an urgent need for a speed reducer that has a small size and can ensure a large torque, which is of great practical significance for improving the stable operation of the lock in complex environments, enhancing the safety performance and service life of the lock, and improving the performance and applicability of the lock. SUMMARY

[0006] In order to overcome the shortcomings of the prior art, the application provides a speed reducer for a lock, which comprises a box body, a driving member mounted in the box body, a transmission member provided on the output end of the driving member, and a rack connected with the transmission member and used for driving the opening and closing work of the lock. The box body is recessed inward to form a plurality of embedded grooves with different depths. The transmission member comprises a plurality of transmission gears that are engaged with each other. The plurality of transmission gears are installed in the embedded grooves with different depths in a stepped manner.

[0007] The application opens embedded grooves with different depths in the box body, and installs a plurality of transmission gears in the embedded grooves with different depths in a stepped manner, so that the box body can reduce the size in the length direction while ensuring the output of a large torque, thereby facilitating reasonable installation in the lock.

[0008] Optionally, the depths of the embedded grooves gradually increase or decrease.

[0009] Optionally, the transmission gear set comprises a driving gear fixed on the output end of the driving member, a first-stage transmission gear meshingly connected with the driving gear, a second-stage transmission gear meshingly connected with the first-stage transmission gear, a third-stage transmission gear meshingly connected with the second-stage transmission gear, a fourth-stage transmission gear meshingly connected with the third-stage transmission gear, and a gear shaft for supporting the rotation of the transmission gears; the fourth-stage transmission gear is meshingly connected with the rack.

[0010] Optionally, the first-stage transmission gear, the second-stage transmission gear, the third-stage transmission gear and the fourth-stage transmission gear are connected with each other through a double connection structure.

[0011] Optionally, the first-stage transmission gear, the second-stage transmission gear, the third-stage transmission gear and the fourth-stage transmission gear are combined by two gears of large and small sizes and integrally formed.

[0012] Optionally, the large gear on the first-stage transmission gear is meshingly connected with the driving gear, the small gear on the first-stage transmission gear is meshingly connected with the large gear on the second-stage transmission gear, the small gear on the second-stage transmission gear is meshingly connected with the large gear on the third-stage transmission gear, the small gear on the third-stage transmission gear is meshingly connected with the large gear on the fourth-stage transmission gear, and the small gear on the fourth-stage transmission gear is meshingly connected with the teeth of the rack.

[0013] Optionally, the projection area of the large gear of the first-stage transmission gear is located on the projection area of the large gear of the second-stage transmission gear, the projection area of the large gear of the second-stage transmission gear is located on the projection area of the large gear of the third-stage transmission gear, and the projection area of the large gear of the third-stage transmission gear is located on the projection area of the large gear of the fourth-stage transmission gear.

[0014] Optionally, the upper end of the box body is connected with a cover body, the cover body and the box body are both provided with corresponding mounting holes, and the gear shaft is installed in the mounting holes at both ends.

[0015] Optionally, the bottom of the box body is provided with a groove for facilitating the installation of the box body in the lock, and the groove is arc-shaped.

[0016] Optionally, one end of the box body is provided with a slot, the rack is slidingly installed in the slot, and one end of the rack is connected with the lock in a driving manner after being pulled out of the slot.

[0017] Compared with the prior art, the beneficial effects of the present scheme are as follows:

[0018] 1. By optimizing the internal space of the box body and reasonably distributing the transmission ratio, the length of the box body is greatly reduced under the premise of meeting the transmission performance, and the internal installation space of various locks can be easily adapted.

[0019] 2. The four-stage double connection gear transmission mechanism can achieve a large transmission ratio, meeting the demand of the lock for low-speed and large-torque power output.

[0020] 3. This solution uses a combination of arc-shaped locking blocks and arc-shaped grooves to enhance the fixing effect of the box body installed in the lock and improve the positioning effect of the box body installed in the lock. By changing the structure of the box body, the box body can be better arranged in the effective space of the lock. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the gearbox for locks provided by the present invention;

[0022] Figure 2 yes Figure 1 The diagram shows a sectional view of the gearbox used for the lock.

[0023] Figure 3 yes Figure 1 An exploded view of the gearbox used in the lock assembly;

[0024] Figure 4 yes Figure 3 The diagram shows the structural design of the gearbox housing for the lock assembly.

[0025] Figure 5 yes Figure 3 The diagram shows the structural design of the cover of the gearbox for the lock.

[0026] Figure 6 yes Figure 3 The diagram shows the structural schematic of the drive component of the gearbox for locks.

[0027] Figure 7 yes Figure 3 The diagram shows the structure of the primary transmission gear of the gearbox for the lock.

[0028] Figure 8 yes Figure 3 The diagram shows the structure of the two-stage transmission gear in the gearbox for the lock.

[0029] Figure 9 yes Figure 3 The diagram shows the structure of the three-stage transmission gear in the lock gearbox.

[0030] Figure 10 yes Figure 3 The diagram shows the structure of a four-stage transmission gearbox for a lock.

[0031] Figure 11 yes Figure 3 The diagram shows the structure of the rack and pinion gearbox for the lock.

[0032] 1. Housing; 2. Cover; 3. Drive component; 4. Drive gear; 5. Primary transmission gear; 6. Secondary transmission gear; 7. Tertiary transmission gear; 8. Quaternary transmission gear; 9. Gear shaft; 10. Rack; 11. Mounting cavity; 12. Mounting hole; 13. Slot; 14. Output shaft; 15. Primary large gear; 16. Primary small gear; 17. Secondary large gear; 18. Secondary small gear; 19. Tertiary large gear; 20. Tertiary small gear; 21. Quaternary large gear; 22. Quaternary small gear; 23. Tooth profile; 24. Inset groove; 25. Groove; 26. Slot; 27. Opening; 28. Arc groove; 29. ​​Clearance groove. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0034] refer to Figures 1-11 A gearbox for locks includes a housing 1, a cover 2, a drive component 3, a drive gear 4, a transmission component, and a rack 10. The housing 1 has an opening at its upper end, through which the drive mechanism is installed inside the housing 1. The cover 2 is fastened to the opening of the housing 1 and can be detached from the housing 1 by bolts or clips. This facilitates the removal of the drive mechanism from the housing 1 for replacement and maintenance. An installation cavity 11 is provided inside the housing 1, where the drive component 3, drive gear 4, transmission component, and rack 10 are all located. The drive component 3 utilizes existing technologies such as motors and electric motors, which are not limited in this application and will not be described in detail here. The drive gear 4 is fixedly mounted on the output shaft 14 of the drive component 3. One end of the transmission component is driven and connected to the drive component 3, and the other end is connected to the rack 10. One end of the rack 10 can extend movably outside the housing 1 to drive and connect with other related components of the lock, thereby driving these other related components. The lock described in this application is prior art. Locks used in the power industry all have locking teeth. By driving the locking teeth, the lock tongue of the lock is opened and closed; thereby, the rack 10 is driven to move through the transmission component, so that the lock can complete the locking and unlocking functions.

[0035] refer to Figures 2-3 In one specific embodiment, the transmission component includes a primary transmission gear 5, a secondary transmission gear 6, a tertiary transmission gear 7, a quaternary transmission gear 8, and a gear shaft 9. The primary transmission gear 5 is meshed with the drive gear 4, the secondary transmission gear 6 is meshed with the primary transmission gear 5, the tertiary transmission gear 7 is meshed with the secondary transmission gear 6, the quaternary transmission gear 8 is meshed with the tertiary transmission gear 7, and the quaternary transmission gear 8 is meshed with the rack 10. Several gear shafts 9 are rotatably provided inside the housing 1, and each transmission gear corresponds one-to-one with each gear shaft 9, all of which are fixedly connected. The gear shafts 9 are used to support the rotation of the transmission gears.

[0036] In actual operation, the driving component 3 drives the driving gear 4 to rotate, the driving gear 4 drives the first-stage transmission gear 5 to rotate, the first-stage transmission gear 5 drives the second-stage transmission gear 6 to rotate, the second-stage transmission gear 6 drives the third-stage transmission gear 7 to rotate, the third-stage transmission gear 7 drives the fourth-stage transmission gear 8 to rotate, and the fourth-stage transmission gear 8 drives the rack 10 to move, thereby completing the locking and unlocking functions.

[0037] In one specific embodiment, the housing 1 is made of high-strength engineering plastic material. Preferably, the housing 1 can be made of materials such as PC+GF, POM, H65, and SUS304. Its internal contour is precisely designed according to the layout of the drive mechanism, and the transmission ratio is reasonably allocated to maximize the use of space and reduce the overall size.

[0038] refer to Figures 2-3 In one specific embodiment, the primary transmission gear 5, secondary transmission gear 6, tertiary transmission gear 7, and quaternary transmission gear 8 are all interconnected via a double-link structure. This increases torque while simultaneously reducing the speed of the electric motor, further simplifying the internal structure and reducing the size of the reduction gearbox, making it suitable for various smart locks with limited space and enhancing the user experience. Through proper lubrication and wear-resistant treatment, as well as precision gear machining and assembly, energy loss and component wear during transmission are reduced, improving the transmission efficiency and service life of the gearbox.

[0039] refer to Figure 2 In another embodiment, the primary transmission gear 5, the secondary transmission gear 6, the tertiary transmission gear 7, and the quaternary transmission gear 8 are installed in a stepped manner within the housing 1. This increases the torque while simplifying the internal structure of the reduction gear and reducing its size.

[0040] In another embodiment, the primary transmission gear 5, the secondary transmission gear 6, the tertiary transmission gear 7, and the quaternary transmission gear 8 are installed in a staggered manner within the housing 1. This increases the torque while simplifying the internal structure of the reduction gear and reducing its size.

[0041] refer to Figures 3-5 In another embodiment, a cover 2 is connected to the upper end of the housing 1. Both the cover 2 and the housing 1 have corresponding mounting holes 12, and both ends of the gear shaft 9 are respectively installed in the mounting holes 12. This facilitates the installation and positioning of the gear shaft 9.

[0042] refer to Figures 3-5 In another embodiment, a slot 13 is provided at one end of the housing 1, and the rack 10 is slidably installed in the slot 13. After one end of the rack 10 passes through the slot 13, it is driven and connected to other related components of the lock, thereby completing the driving of other related components.

[0043] refer to Figures 2-3 In a specific embodiment, the primary transmission gear 5, secondary transmission gear 6, tertiary transmission gear 7, and quaternary transmission gear 8 are all composed of two gears, one large and one small, integrally formed. Specifically, the primary large gear 15 on the primary transmission gear 5 meshes with the drive gear 4; the primary small gear 16 on the primary transmission gear 5 meshes with the secondary large gear 17 on the secondary transmission gear 6; the secondary small gear 18 on the secondary transmission gear 6 meshes with the tertiary large gear 19 on the tertiary transmission gear 7; the tertiary small gear 20 on the tertiary transmission gear 7 meshes with the quaternary large gear 21 on the quaternary transmission gear 8; and the quaternary small gear 22 on the quaternary transmission gear 8 meshes with the tooth profile 23 of the rack 10. Thus, the drive component 3 can drive the rack 10, converting rotational motion into translational motion.

[0044] Part of the projected area of ​​the first-stage large gear 15 lies on the projected area of ​​the second-stage large gear 17, part of the projected area of ​​the second-stage large gear 17 lies on the projected area of ​​the third-stage large gear 19, and part of the projected area of ​​the third-stage large gear 19 lies on the projected area of ​​the fourth-stage large gear 21. This makes the installation of the transmission gear set more compact, reduces the space occupied by the transmission gear set inside the housing 1, and thus reduces the length of the housing 1, allowing the housing 1 to be better installed inside the lock.

[0045] The mounting groove is formed by the inward embedding of the housing 1. Several embedded grooves 24 of varying depths are formed within the housing 1, and these grooves 24 are interconnected to form the mounting groove. The depth of adjacent embedded grooves 24 gradually increases. The first-stage transmission gear 5, the second-stage transmission gear 6, the third-stage transmission gear 7, and the fourth-stage transmission gear 8 are sequentially installed within the embedded grooves 24 of different depths, thus creating a stepped installation of the first-stage transmission gear 5, the second-stage transmission gear 6, the third-stage transmission gear 7, and the fourth-stage transmission gear 8 within the housing 1. In existing technologies, to ensure a high transmission ratio and high torque, additional transmission gears are added to increase the output force of the gearbox. However, this also increases the length of the housing 1, making it difficult to install the housing 1 effectively within the lock. The installation method of this application reduces the length of the housing 1, thus ensuring a high transmission ratio and high torque in a four-stage transmission gearbox while reducing the length of the housing 1, allowing the gearbox to be better and more rationally installed within the limited space inside the lock.

[0046] The bottom of the housing 1 has two curved grooves 25, which allow the housing 1 to be better and more properly installed inside the lock, facilitating its fit within the lock's internal space. The lock also includes a curved locking block (not shown in the attached diagram). This block, in conjunction with the curved grooves 25, enhances the fixation of the housing 1 within the lock and improves its positioning. By altering the structure of the housing 1, its layout within the lock's effective space is optimized.

[0047] The end of the housing 1 is provided with a slot 26 that engages with a lock. The slot 26 is connected to the groove 25 and has a T-shaped structure. This improves the installation efficiency of the housing 1, enhances its fixation, and provides good positioning.

[0048] An opening 27 is provided on the housing 1, which facilitates the installation of the drive component 3 inside the housing 1.

[0049] An arc-shaped groove 28 is provided at one end of the housing 1, and the arc-shaped groove 28 is connected to the slot 13. The arc-shaped groove 28 is used to enlarge the slot 13, making it easier for the rack 10 to move out of the housing 1. At the same time, it makes it easier for the rack 10 to drive and connect with other related components of the lock. This avoids the housing 1 from hindering the connection between the rack 10 and the lock components, allowing the rack 10 to better drive the opening and closing of the lock, thereby improving the volume of the housing 1 and making the housing 1 more rationally installed inside the lock.

[0050] The cover 2 has a clearance groove 29. When the box 1 is installed in the lock, the clearance groove 29 can prevent the box 1 from affecting the operation of the lock and the operation of other parts of the lock, thus making the structure of the box 1 more reasonable.

[0051] Since the main application scenarios for IoT smart locks in the power industry are distribution boxes and metering boxes, these scenarios generally have complex environmental characteristics, such as dust accumulation, salt spray corrosion, high humidity, and prolonged periods of inactivity. These environmental factors easily lead to dust accumulation and corrosion in metering boxes, making it difficult to open the locks. In such cases, locks equipped with the high transmission ratio and high torque reduction gearbox involved in this patent can fully meet the usage requirements of the above scenarios. Therefore, through the above-mentioned design, the small-sized, high transmission ratio, and high torque reduction gearbox for locks proposed in this application can be adapted to the limited space inside the lock body in the power industry due to its compact size. At the same time, relying on the high transmission ratio and high torque output capability, it can ensure smooth extension and retraction of the lock tongue, thereby ensuring that the lock can reliably complete the locking and unlocking actions, maintaining stable and reliable operation in complex usage environments, and effectively improving the safety performance and service life of the lock.

[0052] Finally, it should be noted that the connection and fixing of each part of the gearbox for locks of the present invention can be achieved by conventional mechanical connection structures, and the control system and connection method required between multiple electrical components and drive components can also be achieved by conventional means and can be equipped with corresponding sensors and detectors. As long as the beneficial effect or the specific actions in the above-mentioned work can be achieved, it can be implemented.

[0053] The specification and claims use certain terms to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0054] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0055] The foregoing description presents and describes several preferred embodiments of this application. However, as mentioned above, it should be understood that this application is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the application concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this application should be within the protection scope of the appended claims.

Claims

1. A gearbox for locks, comprising a housing (1), a drive member (3) installed within the housing (1), a transmission member disposed on the output end of the drive member (3), and a rack (10) connected to the transmission member and used for driving the opening and closing of the lock, characterized in that, The housing (1) is recessed inward to form several embedded grooves (24) of different depths. The transmission component includes several transmission gears that mesh with each other. The several transmission gears are installed in a stepped manner in the embedded grooves (24) of different depths.

2. The gearbox for locks according to claim 1, characterized in that, The depth of the embedded groove (24) gradually increases or decreases.

3. The gearbox for locks according to claim 1, characterized in that, The transmission components include a primary transmission gear (5), a secondary transmission gear (6) meshing with the primary transmission gear (5), a tertiary transmission gear (7) meshing with the secondary transmission gear (6), a quaternary transmission gear (8) meshing with the tertiary transmission gear (7), and a gear shaft (9) for supporting the rotation of the transmission gears; the quaternary transmission gear (8) meshes with a rack (10).

4. The gearbox for locks according to claim 3, characterized in that, The first-stage transmission gear (5), the second-stage transmission gear (6), the third-stage transmission gear (7), and the fourth-stage transmission gear (8) are all connected to each other through a double-link structure.

5. The gearbox for locks according to claim 3, characterized in that, The first-stage transmission gear (5), the second-stage transmission gear (6), the third-stage transmission gear (7), and the fourth-stage transmission gear (8) are all composed of two gears, one large and one small, integrally formed.

6. The gearbox for locks according to claim 5, characterized in that, The large gear on the first-stage transmission gear (5) meshes with the drive gear (4), the small gear on the first-stage transmission gear (5) meshes with the large gear on the second-stage transmission gear (6), the small gear on the second-stage transmission gear (6) meshes with the large gear on the third-stage transmission gear (7), the small gear on the third-stage transmission gear (7) meshes with the large gear on the fourth-stage transmission gear (8), and the small gear on the fourth-stage transmission gear (8) meshes with the tooth profile of the rack (10).

7. The gearbox for locks according to claim 6, characterized in that, The projected area of ​​the large gear portion of the first-stage transmission gear (5) is located on the projected area of ​​the large gear of the second-stage transmission gear (6), the projected area of ​​the large gear portion of the second-stage transmission gear (6) is located on the projected area of ​​the large gear of the third-stage transmission gear (7), and the projected area of ​​the large gear portion of the third-stage transmission gear (7) is located on the projected area of ​​the large gear of the fourth-stage transmission gear (8).

8. The gearbox for locks according to claim 3, characterized in that, The upper end of the housing (1) is connected to a cover (2). Both the cover (2) and the housing (1) are provided with corresponding mounting holes (12). The two ends of the gear shaft (9) are respectively installed in the mounting holes (12).

9. The gearbox for locks according to claim 1, characterized in that, The bottom of the box has a groove that facilitates the installation of the box into the lock; the groove is arc-shaped.

10. The gearbox for locks according to claim 1, characterized in that, The housing (1) has a slot (13) at one end, and the rack (10) is slidably installed in the slot (13), and one end of the rack (10) passes through the slot (13) and is connected to the lock drive.

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