Electric drive
The drive device, which uses a dual-motor gear pair transmission, solves the problem of insufficient motor output force in smart locks, and realizes the functions of thin lock body and mechanical key unlocking.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG JIAHE LOCK CO LTD
- Filing Date
- 2025-05-21
- Publication Date
- 2026-05-01
AI Technical Summary
Existing smart locks have small motors with low output force, resulting in a thick lock body. Furthermore, the motors cannot be unlocked by mechanical keys or levers in any state.
The drive unit employs dual motors working together, connected by a gear pair, which increases output power and reduces overall thickness. Hall sensors and magnets are also used to detect the position of the rack so that the motor can be stopped when power is cut off.
It achieves increased output force without increasing the thickness of the lock body and allows the lock to be opened using a mechanical key or lever handle in any state.
Smart Images
Figure CN224187340U_ABST
Abstract
Description
An electric drive Technical Field
[0001] This utility model belongs to the field of lock technology and relates to an electric drive. Background Technology
[0002] Some smart locks on the market work by using a motor to extend or retract the bolt. The motor drives the bolt to move through a transmission device such as a gear pair. The output force (torque) of the motor mainly depends on the following factors:
[0003] 1. Magnetic field strength: Determined by the size and material of the magnet (permanent magnet or electromagnet). Smaller size may result in a smaller magnet area or fewer coil turns. 2. Current capacity: Small motors, limited by the cross-sectional area of the conductors and their heat dissipation capacity, may not be able to withstand large currents.
[0004] Therefore, under the same technical conditions, the smaller the size of the motor, the smaller its output force.
[0005] To ensure smooth operation of the lock, the motor's output force cannot be too small, so the motor's size cannot be too small either. Such a motor would take up a lot of space, resulting in an increase in the overall thickness of the lock body. Summary of the Invention
[0006] The purpose of this invention is to address the aforementioned problems with the motors in existing smart locks by proposing a drive device that uses two motors working together to output power.
[0007] The objective of this utility model can be achieved through the following technical solutions:
[0008] An electric drive includes a mounting box and two drive motors, a drive rack, and a transmission gear disposed within the mounting box. A gear pair three is provided between the drive motors and the transmission gear. The two drive motors are respectively connected to the transmission gear through the gear pair three. The two drive motors work together to provide power to the transmission gear to drive the transmission gear to rotate. A gear pair four is provided between the transmission gear and the drive rack. The transmission gear drives the drive rack to translate through the gear pair four.
[0009] In the aforementioned electric drive, the gear pair three includes a cylindrical gear one, a cylindrical gear two, and a face gear. The cylindrical gear one is fixedly connected to the output shaft of the drive motor, the cylindrical gear two is coaxially fixedly connected to the face gear, the cylindrical gear one meshes with the face gear, and the cylindrical gear two meshes with the aforementioned transmission gear.
[0010] In one of the aforementioned electric drives, the axis of the cylindrical gear is perpendicular to the axis of the face gear.
[0011] In one of the above-mentioned electric drives, two drive motors are arranged in parallel intervals and symmetrically relative to the transmission gears, and two sets of gear pairs are arranged symmetrically relative to the transmission gears.
[0012] In the aforementioned electric drive, the gear pair four includes a large gear one, a large gear two, a large gear three, a small gear one, a small gear two, and a small gear three. Small gear one is coaxially fixed to the large gear, small gear two is coaxially fixed to the aforementioned transmission gear, and small gear three is coaxially fixed to the large gear two. Large gear one meshes with small gear two, small gear one meshes with large gear two, small gear three meshes with large gear three, and large gear three meshes with the aforementioned drive rack.
[0013] In one of the aforementioned electric drives, the electric drive further includes a detection device for detecting the moving position of the drive rack.
[0014] In one of the aforementioned electric drives, the detection device includes a Hall sensor and a magnet. The Hall sensor is fixed inside the mounting box, and the magnet is fixed on the drive rack, which drives the magnet to translate.
[0015] In one of the above-mentioned electric drives, the mounting box is provided with a locking position, an unlocking position, and a stopping position. After the drive motor is powered on, it drives the drive rack and magnet to move horizontally. When the magnet moves to the locking position, unlocking position, and stopping position respectively, the motor is powered off to stop the rack and magnet from moving.
[0016] In one of the aforementioned electric drives, the drive rack is fixedly connected to a mounting plate, and the magnet is fixedly mounted on the mounting plate.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] 1. Two drive motors, with both motors working together on a single gear, can increase output power, and compared to motors with the same output force, the overall thickness of the dual motors is smaller;
[0019] 2. The gears and gear plate are engaged without locking, and the motor can be unlocked with a mechanical key or handle in any state. Attached Figure Description
[0020] Figure 1 is a schematic diagram of the electric drive of this utility model;
[0021] Figure 2 is a schematic diagram of the internal transmission of the electric drive of this utility model;
[0022] Figure 3 is a schematic diagram of the transmission of the two drive motors of this utility model.
[0023] In the diagram: 1. Mounting box; 2. Drive motor; 3. Drive rack; 4. Transmission gear; 5. Cylindrical gear one; 6. Cylindrical gear two; 7. Face gear; 8. Large gear one; 9. Large gear two; 10. Large gear three; 11. Small gear one; 12. Small gear two; 13. Small gear three; 14. Magnet; 15. Mounting plate. Detailed Implementation
[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0025] As shown in Figures 1 and 2, the electric drive of this utility model includes a mounting box 1 and two drive motors 2, a drive rack 3, and a transmission gear 4 disposed in the mounting box 1. A gear pair 3 is provided between the drive motors 2 and the transmission gear 4. The two drive motors 2 are respectively connected to the transmission gear 4 through the gear pair 3. The two drive motors 2 work together to provide power to the transmission gear 4 to drive the transmission gear 4 to rotate. A gear pair 4 is provided between the transmission gear 4 and the drive rack 3. The transmission gear 4 drives the drive rack 3 to translate through the gear pair 4.
[0026] As shown in Figure 3, two drive motors 2 are arranged in parallel intervals and symmetrically relative to the transmission gear 4, and two sets of gear pairs are arranged symmetrically relative to the transmission gear 4.
[0027] The gear pair three includes a first cylindrical gear 5, a second cylindrical gear 6, and a face gear 7. The first cylindrical gear 5 is fixedly connected to the output shaft of the drive motor 2, the second cylindrical gear 6 is coaxially fixedly connected to the face gear 7, the first cylindrical gear 5 meshes with the face gear 7, and the second cylindrical gear 6 meshes with the aforementioned transmission gear 4. The axis of the first cylindrical gear 5 is perpendicular to the axis of the face gear 7.
[0028] The gear pair four includes a large gear 8, a large gear 9, a large gear 3 10, a small gear 11, a small gear 2 12, and a small gear 3 13. The small gear 11 is coaxially fixed to the large gear 8, the small gear 2 12 is coaxially fixed to the aforementioned transmission gear 4, and the small gear 3 13 is coaxially fixed to the large gear 2 9. The large gear 8 meshes with the small gear 2 12, the small gear 11 meshes with the large gear 2 9, the small gear 3 13 meshes with the large gear 3 10, and the large gear 3 10 meshes with the aforementioned drive rack 3.
[0029] The electric drive also includes a detection device for detecting the movement position of the drive rack 3. The detection device includes a Hall sensor and a magnet 14. The Hall sensor is fixed inside the mounting box 1, and the magnet 14 is fixed on the drive rack 3. The drive rack 3 drives the magnet 14 to translate. The drive rack 3 is fixedly connected to a mounting plate 15, and the magnet 14 is fixed on the mounting plate 15.
[0030] The mounting box 1 is provided with a locking position, an unlocking position and a stopping position. After the drive motor 2 is powered on, it drives the drive rack 3 and magnet 14 to move horizontally. When the magnet 14 moves to the locking position, unlocking position and stopping position respectively, the motor is powered off so that the rack 104 and magnet 14 stop moving.
[0031] It should be understood that in the claims and description of this utility model, all instances of "comprising..." should be understood as having an open meaning, that is, their meaning is equivalent to "containing at least...", and should not be understood as having a closed meaning, that is, their meaning should not be understood as "containing only...".
[0032] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
Claims
1. An electric drive, characterized in that It includes a mounting box (1) and two drive motors (2), a drive rack (3), and a transmission gear (4) set in the mounting box (1). There is a gear pair three between the drive motors (2) and the transmission gear (4). The two drive motors (2) are connected to the transmission gear (4) through the gear pair three. The two drive motors (2) work together to provide power to the transmission gear (4) to drive the transmission gear (4) to rotate. There is a gear pair four between the transmission gear (4) and the drive rack (3). The transmission gear (4) drives the drive rack (3) to translate through the gear pair four.
2. An electric drive according to claim 1, characterized in that, The gear pair three includes a first cylindrical gear (5), a second cylindrical gear (6), and a face gear (7). The first cylindrical gear (5) is fixedly connected to the output shaft of the drive motor (2), the second cylindrical gear (6) is fixedly connected to the face gear (7) on the same axis, the first cylindrical gear (5) meshes with the face gear (7), and the second cylindrical gear (6) meshes with the aforementioned transmission gear (4).
3. An electric drive according to claim 2, characterized in that, The axis of the cylindrical gear (5) is perpendicular to the axis of the face gear (7).
4. An electric drive according to claim 1, characterized in that, Two drive motors (2) are arranged in parallel intervals and symmetrically relative to the transmission gear (4), and two sets of gear pairs are arranged symmetrically relative to the transmission gear (4).
5. An electric drive according to claim 1, characterized in that, The gear pair four includes a large gear one (8), a large gear two (9), a large gear three (10), a small gear one (11), a small gear two (12), and a small gear three (13). The small gear one (11) is coaxially fixed to the large gear one (8), the small gear two (12) is coaxially fixed to the aforementioned transmission gear (4), and the small gear three (13) is coaxially fixed to the large gear two (9). The large gear one (8) meshes with the small gear two (12), the small gear one (11) meshes with the large gear two (9), the small gear three (13) meshes with the large gear three (10), and the large gear three (10) meshes with the aforementioned drive rack (3).
6. The electric drive of claim 1, wherein, The electric drive also includes a detection device for detecting the movement position of the drive rack (3).
7. An electric drive according to claim 6, characterized in that The detection device includes a Hall sensor and a magnet (14). The Hall sensor is fixed inside the mounting box (1), and the magnet (14) is fixed on the drive rack (3). The drive rack (3) drives the magnet (14) to translate.
8. An electric drive according to claim 7, characterized in that, The mounting box (1) is provided with a locking position, an unlocking position and a stopping position. After the drive motor (2) is powered on, it drives the drive rack (3) and magnet (14) to move horizontally. When the magnet (14) moves to the locking position, unlocking position and stopping position respectively, the motor is powered off so that the rack (104) and magnet (14) stop moving.
9. The electric drive of claim 7, wherein, The drive rack (3) is fixedly connected to a mounting plate (15), and the magnet (14) is fixedly mounted on the mounting plate (15).