Smart lock motor and smart lock

Abstract

The present invention relates to the technical field of door locks, and specifically to a smart lock motor and a smart lock. The smart lock motor comprises a motor, a gear transmission device, and a speed reduction device; the gear transmission device is used for transmitting a driving force of the motor to the speed reduction device; the speed reduction device comprises a housing; two stages of planet gears transmittingly connected in sequence are provided in the housing; a second planet carrier is fixedly connected to an output shaft of the speed reduction device; an internal gear is provided on the inner side of the housing; and a first planet gear and a second planet gear among the two stages of planet gears are both engaged with the internal gear. The present invention can increase the transmission ratio, reduce the back driving force, and easily achieve unlocking.

Description

Smart lock motor and smart lock Technical Field

[0001] The present invention relates to the technical field of door locks, and in particular to a smart lock motor and a smart lock. Background Art

[0002] A smart lock is an improvement on the traditional mechanical lock. It is more intelligent and simple in terms of user security, identification and management. During the use of the smart lock, the smart lock motor provides power output to the lock cylinder through the transmission mechanism, which is used to drive the lock cylinder of the door body so that the lock tongue on the side of the door body can move back and forth between the position of being completely retracted into the door body or the position of being extended to the side of the body.

[0003] However, in the current conventional design of smart lock motors, multiple scattered gears are mostly used to mesh and transmit energy. However, this structure is not compact enough, the transmission ratio range is small, and there is a large reverse driving force, which makes unlocking more difficult. Summary of the Invention

[0004] The purpose of the present invention is to provide a smart lock motor and a smart lock with a compact structure, improved transmission ratio, reduced back-driving force, and easy unlocking.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] On the one hand, the present invention provides a smart lock motor, comprising: a motor, a gear transmission device and a reduction device, wherein the motor output shaft is connected to the gear transmission device, the gear transmission device is in driving connection with one end of the reduction device input shaft, and the gear transmission device is used to transmit the driving force of the motor to the reduction device;

[0007] The reduction gear includes a housing, the other end of the reduction gear input shaft extends into the housing and is transmission-connected to the first sun gear, a first planetary carrier is provided above the first sun gear, a plurality of first gear shafts are provided at the lower end of the first planetary carrier, a plurality of first gear shafts are sleeved with first planetary gears meshing with the first sun gear, a second sun gear is fixedly connected to the upper end face of the first planetary carrier, a second planetary carrier is provided above the first planetary carrier, a plurality of second gear shafts are provided at the lower end of the second planetary carrier, a plurality of second gear shafts are sleeved with second planetary gears meshing with the second sun gear, the second planetary carrier is fixedly connected to the output shaft of the reduction gear, an inner ring gear is provided on the inside of the housing, and the first planetary gears and the second planetary gears are meshed with the inner ring gear.

[0008] Preferably, the gear transmission device includes a first gear, a second gear, a third gear, a fourth gear, a fifth gear and a sixth gear, the first gear is connected to the output shaft of the motor, the second gear is meshed with the first gear, the third gear is coaxially arranged with the second gear, the fourth gear is meshed with the third gear, the fifth gear is coaxially arranged with the fourth gear, the sixth gear is meshed with the fifth gear, and the sixth gear is connected to the input shaft of the reduction device, the bottom surfaces of the first gear, the second gear, the fourth gear and the sixth gear are located in the same horizontal plane, and the bottom surfaces of the third gear and the fifth gear are located in the same horizontal plane.

[0009] Furthermore, the radius of the second gear is greater than the radius of the first gear, the radius of the fourth gear is greater than the radius of the third gear, the radius of the sixth gear is greater than the radius of the fifth gear, and the sum of the radii of the second gear and the fifth gear is less than the sum of the radii of the third gear and the fourth gear.

[0010] Preferably, it further includes a bottom plate, the motor output shaft passes through the bottom plate to be connected to the gear transmission device, and the reduction device input shaft passes through the bottom plate and extends into the housing.

[0011] Furthermore, a positioning structure is provided above the second planetary carrier, and the output shaft of the reduction gear passes through the positioning structure. The positioning structure is bolted to the upper end face of the housing, and the lower end of the housing is bolted to the base plate.

[0012] In a second aspect, the present invention provides a smart lock having any smart lock motor described in the first aspect.

[0013] The beneficial effects of the present invention are as follows: the gear transmission device is designed with a multi-stage staggered gear transmission, which can improve the transmission ratio compared to a single-stage gear, and the gear transmission device initially decelerates the motor output, and then decelerates it again through the multi-stage planetary gears in the deceleration device, thereby achieving a larger torque output in a limited space and achieving an overall deceleration and force increase effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] FIG1 is a schematic diagram of a three-dimensional structure of the present invention;

[0016] FIG2 is a second schematic diagram of the three-dimensional structure of the present invention;

[0017] FIG3 is a schematic diagram of the explosion structure of the present invention;

[0018] FIG4 is a schematic diagram of the three-dimensional structure of the housing of the present invention;

[0019] Markings in the figure: 1 is the motor, 2 is the gear transmission device, 3 is the reduction device, 4 is the base plate, 11 is the motor output shaft, 21 is the first gear, 22 is the second gear, 23 is the third gear, 24 is the fourth gear, 25 is the fifth gear, 26 is the sixth gear, 31 is the reduction device input shaft, 32 is the housing, 33 is the first sun gear, 34 is the first planetary carrier, 35 is the first planetary gear, 36 is the second planetary carrier, 37 is the second planetary gear, 38 is the positioning structure, 39 is the reduction device output shaft, 321 is the inner ring gear, 341 is the first gear shaft, 342 is the second sun gear, and 361 is the second gear shaft. DETAILED DESCRIPTION

[0020] Example 1

[0021] A smart lock motor as shown in Figures 1-4, as shown in Figure 1, includes: a motor 1, a gear transmission device 2 and a reduction device 3, the motor output shaft 11 is connected to the gear transmission device 2, the gear transmission device 2 is connected to one end of the reduction device input shaft 31, and the gear transmission device 2 is used to transmit the driving force of the motor 1 to the reduction device 3.

[0022] The gear transmission device is specifically shown in Figure 2, including a first gear 21, a second gear 22, a third gear 23, a fourth gear 24, a fifth gear 25 and a sixth gear 26. The first gear 21 is connected to the motor output shaft 11, the second gear 22 is meshed with the first gear 21, the third gear 23 is coaxially arranged with the second gear 22, the fourth gear 24 is meshed with the third gear 23, the fifth gear 25 is coaxially arranged with the fourth gear 24, the sixth gear 26 is meshed with the fifth gear 25, and the sixth gear 26 is connected to the speed reduction device input shaft 31. The bottom surfaces of the first gear 21, the second gear 22, the fourth gear 24 and the sixth gear 26 are located at the same A horizontal plane, the bottom surfaces of the third gear 23 and the fifth gear 25 are located in the same horizontal plane; the motor output shaft 11 drives the first gear 21 to rotate, the first gear 21 drives the second gear 22 meshing therewith to rotate, the third gear 23 is coaxially arranged with the second gear 22, the third gear 23 rotates together with the second gear 22 and at the same speed, the third gear 23 drives the fourth gear 24 meshing therewith to rotate, the fourth gear and the fifth gear 25 are coaxially arranged, the fifth gear 25 rotates together with the fourth gear 24 and at the same speed, the fifth gear 25 drives the sixth gear 26 meshing therewith to rotate, and the reduction device input shaft 31 rotates together with the sixth gear 26.

[0023] In a specific embodiment, the radius of the second gear 22 is greater than the radius of the first gear 21, the radius of the fourth gear 24 is greater than the radius of the third gear 23, the radius of the sixth gear 26 is greater than the radius of the fifth gear 25, and the sum of the radii of the second gear 22 and the fifth gear 25 is less than the sum of the radii of the third gear 23 and the fourth gear 24. The transmission ratio can be adjusted by setting the above-mentioned gear radius, and a larger torque output can be achieved in a limited space. The internal space of the lock body can be utilized to a greater extent, which plays a role in deceleration and force increase.

[0024] As shown in Figure 3, the reduction gear 3 includes a housing 32, the other end of the reduction gear input shaft 31 extends into the housing 32 and is drivingly connected to the first sun gear 33, a first planet carrier 34 is provided above the first sun gear 33, and a plurality of first gear shafts 341 are provided at the lower end of the first planet carrier 34, each of which is sleeved with a first planetary gear 35 that meshes with the first sun gear 33, a second sun gear 342 is fixedly connected to the upper end surface of the first planet carrier 34, a second planet carrier 36 is provided above the first planet carrier 34, and a plurality of second gear shafts 361 are provided at the lower end of the second planet carrier 36, each of which is sleeved with a second planetary gear 37 that meshes with the second sun gear 342, the second planet carrier 36 is fixedly connected to the reduction gear output shaft 39, an inner ring gear 321 is provided inside the housing 32, and the first planetary gears 35 and the second planetary gears 37 are meshed with the inner ring gear 321.

[0025] In a specific embodiment, there are three first planetary gears 35 and three second planetary gears 37 .

[0026] In a specific embodiment, positioning shafts are provided on both the first planet carrier 34 and the second planet carrier 36 , which can effectively ensure that the gears will not be eccentric to one side during reverse driving, and also ensure the concentricity and stability of the internal gear transmission.

[0027] A positioning structure 38 is further provided above the second planetary carrier 36 , through which the output shaft 39 of the reduction gear passes. The positioning structure 38 is bolted to the upper end surface of the housing 32 , and the lower end of the housing 32 is bolted to the base plate 4 .

[0028] In a specific embodiment, a bottom plate 4 is further included. The motor output shaft 11 passes through the bottom plate 4 and is connected to the gear transmission device 2 . The reduction device input shaft 31 passes through the bottom plate 4 and extends into the housing 32 .

[0029] The input shaft 31 of the reduction gear drives the first sun gear 33 to rotate, and the first sun gear 33 drives the first planetary gear 35 meshing with it to rotate. The first planetary gear 35 meshes with the inner ring gear 321 inside the housing 32. Since the housing 32 is fixed to the base plate 4 and the positioning structure 38, the first planetary gear 35 rotates relative to the inner ring gear 321, that is, the first planetary gear 35 revolves relative to the first sun gear 33. Since the first planetary gear 35 is sleeved on the first gear shaft 341 on the first planet carrier 34, the revolution of the first planetary gear indirectly drives the rotation of the first planet carrier 34. The first planet carrier 34 is provided with a second sun gear 342. The second sun gear 342 rotates with the rotation of the first planet carrier 34. The positive gear 342 drives the second planetary gear 37 meshing with it to rotate, and the second planetary gear 37 is also meshed with the inner ring gear 321 inside the housing 32, so the second planetary gear 37 also rotates relative to the inner ring gear 321, that is, the second planetary gear 37 revolves relative to the second sun gear 342. Because the second planetary gear 37 is too fixed on the second gear shaft 361 of the second planetary carrier 36, the revolution of the second planetary gear 37 indirectly drives the second planetary carrier 36 to rotate. The second planetary carrier 36 is fixedly connected to the output shaft 39 of the reduction gear, and therefore indirectly drives the output shaft 39 of the reduction gear to rotate, thereby driving the lock cylinder to rotate; the two-stage planetary gear system not only achieves further deceleration, but also improves the transmission ratio and reduces the back drive force.

[0030] In a specific embodiment, the motor 1 uses a hollow cup motor with low self-locking force to reduce the back-driving force from the source; the gear uses synthetic plastic material according to the torque requirement, and the back-driving force is reduced because the friction coefficient of the plastic material itself is small.

[0031] Example 2

[0032] The present invention provides a smart lock having any smart lock motor described in Example 1.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A smart lock motor, characterized in that: include: A motor, a gear transmission device and a reduction gear, wherein the motor output shaft is connected to the gear transmission device, and the gear transmission device is drivingly connected to one end of the reduction gear input shaft, and the gear transmission device is used to transmit the driving force of the motor to the reduction gear; The reduction gear includes a housing, the other end of the reduction gear input shaft extends into the housing and is transmission-connected to the first sun gear, a first planetary carrier is provided above the first sun gear, a plurality of first gear shafts are provided at the lower end of the first planetary carrier, a plurality of first gear shafts are sleeved with first planetary gears meshing with the first sun gear, a second sun gear is fixedly connected to the upper end face of the first planetary carrier, a second planetary carrier is provided above the first planetary carrier, a plurality of second gear shafts are provided at the lower end of the second planetary carrier, a plurality of second gear shafts are sleeved with second planetary gears meshing with the second sun gear, the second planetary carrier is fixedly connected to the output shaft of the reduction gear, an inner ring gear is provided on the inside of the housing, and the first planetary gears and the second planetary gears are meshed with the inner ring gear.

2. The smart lock motor according to claim 1, characterized in that: The gear transmission device includes a first gear, a second gear, a third gear, a fourth gear, a fifth gear and a sixth gear. The first gear is connected to the output shaft of the motor, the second gear is meshed with the first gear, the third gear is coaxially arranged with the second gear, the fourth gear is meshed with the third gear, the fifth gear is coaxially arranged with the fourth gear, the sixth gear is meshed with the fifth gear, and the sixth gear is connected to the input shaft of the reduction device. The bottom surfaces of the first gear, the second gear, the fourth gear and the sixth gear are located in the same horizontal plane, and the bottom surfaces of the third gear and the fifth gear are located in the same horizontal plane.

3. The smart lock motor according to claim 2, characterized in that: The second gear radius is greater than the first gear radius, the fourth gear radius is greater than the third gear radius, the sixth gear radius is greater than the fifth gear radius, and the sum of the radii of the second gear and the fifth gear is less than the sum of the radii of the third gear and the fourth gear.

4. The smart lock motor according to claim 1, characterized in that: It also includes a bottom plate, the motor output shaft passes through the bottom plate and is connected to the gear transmission device, and the reduction device input shaft passes through the bottom plate and extends into the shell.

5. The smart lock motor according to claim 4, characterized in that: A positioning structure is further provided above the second planetary carrier, through which the output shaft of the reduction gear passes. The positioning structure is bolted to the upper end face of the housing, and the lower end of the housing is bolted to the base plate.

6. A smart lock, characterized in that: A smart lock motor according to any one of claims 1 to 5.

Images