A compact intelligent curtain motor

Abstract

The utility model relates to the technical field of smart home equipment, more specifically to a compact intelligent curtain motor, including shell frame and Z shape bottom shell, shell frame is used for with curtain rail assembly, and Z shape bottom shell is located shell frame bottom and is formed with shell frame jointly closed cavity, the lower left corner of shell frame is equipped with square corner, is used for with curtain rail plug -in assembly cooperation realizes horizontal positioning, including shell frame and Z shape bottom shell, shell frame is used for with curtain rail assembly, and Z shape bottom shell is located shell frame bottom and is formed with shell frame jointly closed cavity, the lower left corner of shell frame is equipped with square corner, is used for with curtain rail plug -in assembly cooperation realizes horizontal positioning etc. The utility model passes through the three -dimensional nesting design of Z shape bottom shell and shell frame, and the motor, the speed reducer, the clutch and the power module are arranged vertically in layers in the very small space, solve the installation problem of traditional curtain motor in the narrow rail space, reach the effect of miniaturization, high reliability and easy deployment.

Description

Technical Field

[0001] This utility model relates to the field of smart home equipment technology, and more specifically to a compact smart curtain motor. Background Technology

[0002] Traditional curtain motors generally suffer from two major drawbacks: poor spatial adaptability and low functional integration. Their motor bodies often employ a horizontally stacked structure, resulting in an overall length exceeding 120mm. This makes them unsuitable for older homes or narrow curtain tracks (with an internal cavity width typically <50mm), forcing users to modify the track or sacrifice installation concealment. Power transmission relies on a single reduction gear set, necessitating an increase in gear module to meet torque requirements, further exacerbating the size expansion. Installation is cumbersome and tool-dependent—requiring multiple points of bolt fixation between the motor base and the track, making operation extremely inconvenient in narrow overhead spaces, averaging over 5 minutes. Safety protection mechanisms are also lacking. Weaknesses: The clutches mostly use mechanical ratchet structures, which are prone to tooth breakage damage under overload. The impact force is directly transmitted to the motor windings, causing them to burn out. The control accuracy is severely limited, and the position of the curtain can only be indirectly estimated through the encoder at the motor end. Due to the cumulative error of gear backlash, the stroke positioning deviation often reaches ±10mm or more, making it impossible to achieve precise segmented control. In addition, the external or separate design of the power module increases the complexity of wiring. The rigid shaft connection between the reducer and the clutch is prone to resonance noise (>45dB). Maintenance requires complete disassembly, which greatly increases after-sales costs. These defects together restrict the popularization and reliable application of smart curtains in compact space scenarios. Utility Model Content

[0003] The purpose of this utility model is to solve the defects of traditional curtain motors, such as bulky size making them difficult to fit narrow guide rails, low installation efficiency, weak overload protection, insufficient positioning accuracy, and high maintenance costs. This utility model provides a miniaturized, highly reliable, and easy-to-deploy compact intelligent curtain motor.

[0004] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0005] This utility model proposes a compact intelligent curtain motor, including an outer frame and a Z-shaped bottom shell. The outer frame is used to assemble with the curtain rail, and the Z-shaped bottom shell is located at the bottom of the outer frame and together with the outer frame forms a closed cavity. The lower left corner of the outer frame is provided with a square notch, which is used to insert and cooperate with the curtain rail to achieve lateral positioning.

[0006] The motor is fixed to the right bottom end of the Z-shaped base shell via a base plate;

[0007] The vertical plate is fixed between the base plate and the right half of the outer frame, and the power module is located on its right side.

[0008] The reducer is located at the top of the housing frame and on the left side of the vertical plate;

[0009] The clutch is mounted on the left bottom end of the Z-shaped base;

[0010] The motor output end is connected to the reducer drive end for transmission.

[0011] The output end of the reducer is connected to the drive end of the clutch.

[0012] The clutch output extends through the Z-shaped bottom shell into the inner cavity of the curtain track, and is used to drive the belt movement of the curtain hook.

[0013] As a preferred technical solution of this utility model, the left side of the outer frame is provided with a buckle device for snapping and assembling with the curtain track.

[0014] The latching device includes a latching frame, a button, an elastic element, and a T-hook;

[0015] The snap-on frame is fixed to the side of the outer frame and located above the curtain track;

[0016] The button is slidably connected to the buckle frame, with its left end penetrating through the side of the buckle frame and its right end connected to the buckle frame via an elastic element;

[0017] The bottom of the button is equipped with a T-shaped hook, which is used to pass through the locking hole of the curtain track and form a locking fit.

[0018] As a preferred technical solution of this utility model, the reducer includes an upper cover, a lower cover, a first double gear, a second double gear, and a third double gear;

[0019] The top cover can be detachably installed inside the top of the outer casing frame;

[0020] The lower cover can be detachably installed at the bottom of the upper cover;

[0021] The first double gear, the second double gear, and the third double gear mesh and are assembled between the upper cover and the lower cover from left to right;

[0022] The motor output end passes through the lower cover and meshes with the third double gear through the transmission gear;

[0023] The first double gear is connected to the clutch drive end for transmission.

[0024] As a preferred technical solution of this utility model, the clutch includes an upper clutch shaft, a cam, a clutch stepping gear, two magnetic beads, a reset groove, and a lower clutch shaft;

[0025] The upper end of the clutch shaft is connected to the lower cover bearing and is also connected to the first double gear transmission.

[0026] A cam is mounted on the lower end of the upper shaft of the clutch, and the cam is located inside the clutch stepping gear;

[0027] Two magnetic beads are located within the step teeth of the assembly and are magnetically engaged with the bearing of the lower cover;

[0028] Two reset grooves are provided on the inner side of the total step tooth, and the distance between the two reset grooves is equal to the inner cavity diameter of the total step tooth, which is used for magnetic bead reset;

[0029] The clutch lower shaft is assembled at the bottom end of the clutch stepping gear, and the clutch lower shaft passes through the Z-shaped bottom shell and is connected to the belt gear.

[0030] As a preferred technical solution of this utility model, an external cover is provided at the bottom of the inner cavity of the curtain track;

[0031] A hollow support rod is fixed to the top of the external cover, and the inner end of the hollow support rod is connected to the shaft bearing at the bottom of the belt gear.

[0032] As a preferred technical solution of this utility model, the outer frame and the Z-shaped bottom shell and the reducer, or the Z-shaped bottom shell and the base plate are detachably fixed by threaded connectors.

[0033] As a preferred embodiment of this utility model, the outer shell frame has a length of 100mm, a height of 70mm, and a width of 44mm.

[0034] As a preferred technical solution of this utility model, the left top of the Z-shaped bottom shell is provided with a grating speed measuring device, the working end of which is located on both sides of the clutch step teeth, and is used to detect the number of rotations of the clutch output end.

[0035] As a preferred embodiment of this utility model, a power interface is provided on the top of the outer shell frame, and the power interface is electrically connected to the power module.

[0036] As a preferred embodiment of this utility model, the belt gear is disposed in the inner cavity of the curtain guide rail and is used to directly mesh and drive the curtain belt.

[0037] The beneficial effects of this utility model are as follows:

[0038] This invention solves the installation problem of traditional curtain motors in confined spaces by vertically arranging the motor, reducer, clutch, and power module in a tiny space through a three-dimensional nested design of a Z-shaped base shell and outer frame (100×70×44mm). It achieves tool-free, second-level installation by utilizing the synergistic effect of a square-corner lateral insertion device and a spring-loaded snap-fit ​​mechanism. The composite transmission architecture of a three-stage reduction dual-gear set and a magnetic clutch provides high torque output while achieving millisecond-level overload slippage protection through a cam-magnetic bead reset mechanism. Combined with a grating tachometer for direct monitoring and closed-loop control of the clutch output, the stroke positioning accuracy is improved to the centimeter level. Furthermore, the modular threaded connection design allows for independent maintenance and replacement of core components, enabling the intelligent curtain motor to achieve miniaturization, high reliability, and easy deployment in a very small space. Attached Figure Description

[0039] Figure 1 This is a partial cross-sectional structural diagram of the present invention;

[0040] Figure 2 This is a schematic diagram of the disassembled structure of the clutch part of this utility model;

[0041] Figure 3 This is an exploded structural diagram of the present invention;

[0042] Figure 4 This is a schematic diagram of the structure of this utility model.

[0043] Reference numerals: 1-Outer shell frame, 2-Z-shaped bottom shell, 3-Base plate, 4-Motor, 5-Vertical plate, 6-Power module, 7-Reducer, 71-Upper cover, 72-Lower cover, 73-First double gear, 74-Second double gear, 75-Third double gear, 8-Transmission gear, 9-Grate tachometer, 11-External cover, 12-Curtain rail, A-Snap-on device, A1-T-hook, A2-Button, A3-Elastic element, A4-Snap-on frame, A5-Snap hole, B-Clutch, B1-Lower clutch shaft, B2-Clutch stepping gear, B3-Magnetic bead, B4-Cam, B5-Upper clutch shaft, B6-Reset groove, B9-Belt gear, B10-Support hollow rod. Detailed Implementation

[0044] This utility model proposes a compact intelligent curtain motor, including an outer frame and a Z-shaped bottom shell. The outer frame is used to assemble with the curtain rail, and the Z-shaped bottom shell is located at the bottom of the outer frame and together with the outer frame forms a closed cavity. The lower left corner of the outer frame is provided with a square notch, which is used to insert and cooperate with the curtain rail to achieve lateral positioning.

[0045] The motor is fixed to the right bottom end of the Z-shaped base shell via a base plate;

[0046] The vertical plate is fixed between the base plate and the right half of the outer frame, and the power module is located on its right side.

[0047] The reducer is located at the top of the housing frame and on the left side of the vertical plate;

[0048] The clutch is mounted on the left bottom end of the Z-shaped base;

[0049] The motor output end is connected to the reducer drive end for transmission.

[0050] The output end of the reducer is connected to the drive end of the clutch.

[0051] The clutch output extends through the Z-shaped bottom shell into the inner cavity of the curtain track, and is used to drive the belt movement of the curtain hook.

[0052] The outer frame is provided with a buckle device on the left side for snapping and assembling with the curtain track;

[0053] The latching device includes a latching frame, a button, an elastic element, and a T-hook;

[0054] The snap-on frame is fixed to the side of the outer frame and located above the curtain track;

[0055] The button is slidably connected to the buckle frame, with its left end penetrating through the side of the buckle frame and its right end connected to the buckle frame via an elastic element;

[0056] The bottom of the button is equipped with a T-shaped hook, which is used to pass through the locking hole of the curtain track and form a locking fit.

[0057] The reducer includes an upper cover, a lower cover, a first double gear, a second double gear, and a third double gear;

[0058] The top cover can be detachably installed inside the top of the outer casing frame;

[0059] The lower cover can be detachably installed at the bottom of the upper cover;

[0060] The first double gear, the second double gear, and the third double gear mesh and are assembled between the upper cover and the lower cover from left to right;

[0061] The motor output end passes through the lower cover and meshes with the third double gear through the transmission gear;

[0062] The first double gear is connected to the clutch drive end for transmission.

[0063] The clutch includes an upper clutch shaft, a cam, clutch stepping teeth, two magnetic beads, a reset groove, and a lower clutch shaft.

[0064] The upper end of the clutch shaft is connected to the lower cover bearing and is also connected to the first double gear transmission.

[0065] A cam is mounted on the lower end of the upper shaft of the clutch, and the cam is located inside the clutch stepping gear;

[0066] Two magnetic beads are located within the step teeth of the assembly and are magnetically engaged with the bearing of the lower cover;

[0067] Two reset grooves are provided on the inner side of the total step tooth, and the distance between the two reset grooves is equal to the inner cavity diameter of the total step tooth, which is used for magnetic bead reset;

[0068] The clutch lower shaft is assembled at the bottom end of the clutch stepping gear, and the clutch lower shaft passes through the Z-shaped bottom shell and is connected to the belt gear.

[0069] The bottom of the inner cavity of the curtain track is equipped with an external cover;

[0070] A hollow support rod is fixed to the top of the external cover, and the inner end of the hollow support rod is connected to the shaft bearing at the bottom of the belt gear.

[0071] The outer frame and the Z-shaped bottom shell, or the reducer, or the Z-shaped bottom shell and the base plate, are all detachably fixed by threaded connectors.

[0072] The outer frame has a length of 100mm, a height of 70mm, and a width of 44mm.

[0073] The Z-shaped bottom shell has a grating speed measuring device at its top left end, with its working end located on both sides of the clutch step teeth, used to detect the number of rotations at the clutch output end.

[0074] The outer frame has a power interface on its top, which is electrically connected to the power module.

[0075] The belt gear is located inside the curtain track and is used to directly engage and drive the curtain belt.

[0076] Working Principle: When a user issues a command to open or close the curtains via a smart terminal (such as a mobile app or remote control), the power module receives power through the power interface at the top of the outer frame and activates the motor. After the motor starts, its output drives the third double gear in the reducer to rotate through the transmission gear. The power is then transmitted sequentially through the meshing third double gear and second double gear to the first double gear, achieving three-stage reduction and torque increase. The reduced power is output from the first double gear to the clutch upper shaft, which drives the cam at its lower end to rotate. The cam pushes the two magnetic beads inside the clutch stepping teeth to move along the reset groove, causing the clutch stepping teeth to separate from the magnetically fixed lower cover and rotate synchronously. This, in turn, drives the clutch lower shaft at the bottom to rotate. The clutch lower shaft extends through the Z-shaped bottom shell to the curtain rail. The inner cavity drives the connected belt gear to rotate. This gear directly meshes with the closed-loop transmission belt in the curtain guide rail, pulling the curtain hooks fixed on the belt to move horizontally, thereby opening or closing the curtains. During this process, the grating speed sensor monitors the number of rotations of the clutch stepping gear in real time and feeds the speed data back to the control system. The system achieves precise positioning of the curtain travel by dynamically adjusting the motor speed. When encountering resistance or manual operation, the clutch achieves slippage protection through the displacement of the magnetic bead in the reset groove, ensuring the safe operation of the system. The entire power transmission process is efficiently completed in a compact cavity composed of the outer frame and the Z-shaped bottom shell. Its special square notch, the insertion fit of the guide rail, and the locking of the buckle device ensure the structural stability of the motor during operation.

[0077] This utility model solves the installation problem of traditional curtain motors in narrow guide rail space by using a three-dimensional nested design of Z-shaped bottom shell and outer frame (100×70×44mm) to vertically and layer the motor, reducer, clutch and power module in a very small space.

[0078] The square notch and horizontal insertion positioning design in this utility model simplify the assembly process with the guide rail. Combined with the spring-loaded buckle device (T-hook + elastic element), it enables quick one-handed assembly and disassembly, significantly improving installation efficiency.

[0079] This utility model adopts an innovative combination of a three-stage reduction gear set (first to third double gear meshing) and a magnetic clutch: the reducer efficiently amplifies the motor torque through a compact three-stage transmission, while the clutch's cam-magnetic bead reset structure (two magnetic beads + reset groove) ensures precise synchronization of power transmission and allows for instantaneous slippage through magnetic bead displacement under overload conditions, preventing motor burnout or curtain damage. The grating tachometer monitors the clutch output in real time, forming a closed-loop feedback control. Combined with the stable power supply of the power module, the curtain travel positioning error can be controlled within the centimeter level. In addition, the belt design of the belt-driven direct-drive guide rail eliminates intermediate transmission components, reducing mechanical losses and noise. All core components (motor, reducer, clutch) are modularly fixed in a closed cavity through threaded connectors, facilitating maintenance and replacement.

[0080] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0081] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0082] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A compact intelligent curtain motor, comprising a housing frame (1) and a Z-shaped bottom shell (2), wherein the housing frame (1) is used for assembly with a curtain track (12), and the Z-shaped bottom shell (2) is disposed at the bottom of the housing frame and together with the housing frame forms a closed cavity, characterized in that: The lower left corner of the outer frame (1) is provided with a square notch, which is used to insert and cooperate with the curtain rail (12) to achieve lateral positioning; The motor (4) is fixed to the right bottom end of the Z-shaped bottom shell (2) via the base plate (3); The vertical plate (5) is vertically fixed between the bottom plate (3) and the right half of the outer frame (1), and a power module (6) is provided on its right side. The reducer (7) is located at the top inside the outer casing (1) and to the left of the vertical plate (5); The clutch (B) is assembled at the left bottom end of the Z-shaped bottom shell (2); The output end of the motor (4) is connected to the drive end of the reducer (7) for transmission; The output end of the reducer (7) is connected to the drive end of the clutch (B) for transmission; The clutch output end extends through the Z-shaped bottom shell (2) to the inner cavity of the curtain rail (12) to drive the belt movement of the curtain hook.

2. The compact intelligent curtain motor according to claim 1, characterized in that: The outer frame (1) is provided with a buckle device (A) on the left side for engaging with the curtain rail (12); The snap-fit ​​device (A) includes a snap-fit ​​frame (A4), a button (A2), an elastic element (A3), and a T-hook (A1); The snap-on frame (A4) is fixed to the side of the outer frame (1) and located above the curtain track (12); The button (A2) is slidably connected to the buckle frame (A4), with its left end passing through the side of the buckle frame (A4) and its right end connected to the buckle frame (A4) via an elastic element (A3); The bottom of the button (A2) is provided with a T-shaped hook (A1), which is used to pass through the locking hole (A5) of the curtain rail (12) and form a locking fit.

3. A compact intelligent curtain motor according to claim 1, characterized in that: The reducer (7) includes an upper cover (71), a lower cover (72), a first double gear (73), a second double gear (74), and a third double gear (75); The top cover (71) is detachably installed on the top of the outer casing frame (1); The lower cover (72) is detachably installed at the bottom of the upper cover (71); The first double gear (73), the second double gear (74), and the third double gear (75) mesh and are assembled between the upper cover (71) and the lower cover (72) from left to right; The output end of the motor (4) passes through the lower cover (72) and meshes with the third double gear (75) through the transmission gear (8); The first double gear (73) is connected to the drive end of the clutch (B) for transmission.

4. A compact intelligent curtain motor according to claim 3, characterized in that: The clutch (B) includes an upper clutch shaft (B5), a cam (B4), a clutch stepping tooth (B2), two magnetic beads (B3), a reset groove (B6), and a lower clutch shaft (B1). The upper end of the clutch upper shaft (B5) is connected to the bearing of the lower cover (72) and is connected to the first double gear (73) for transmission. A cam (B4) is mounted on the lower end of the upper clutch shaft (B5), and the cam (B4) is located inside the clutch stepping gear (B2); Two magnetic beads (B3) are located within the total step teeth (B2) and are magnetically engaged with the bearings of the lower cover (72); Two reset slots (B6) are provided on the inner side of the total step tooth (B2), and the distance between the two reset slots (B6) is equal to the inner diameter of the cavity of the total step tooth (B2), which are used for resetting the magnetic bead (B3); The clutch lower shaft (B1) is assembled at the bottom of the clutch stepping gear (B2), and the clutch lower shaft (B1) passes through the Z-shaped bottom shell (2) and is connected to the belt gear (B9).

5. A compact intelligent curtain motor according to claim 4, characterized in that: The bottom of the inner cavity of the curtain track (12) is provided with an external cover (11); The top of the external cover (11) is fixed with a supporting hollow rod (B10), and the inner end of the supporting hollow rod (B10) is connected to the shaft bearing at the bottom of the belt gear (B9).

6. A compact intelligent curtain motor according to claim 1, characterized in that: The outer frame (1) and the Z-shaped bottom shell (2) and the reducer (7), or the Z-shaped bottom shell (2) and the base plate (3) are detachably fixed by threaded connectors.

7. A compact intelligent curtain motor according to claim 1, characterized in that: The outer frame (1) has a length of 100mm, a height of 70mm, and a width of 44mm.

8. A compact intelligent curtain motor according to claim 4, characterized in that: The left top of the Z-shaped bottom shell (2) is provided with a grating speed measuring device (9), whose working end is located on both sides of the total step tooth (B2) and is used to detect the number of rotations of the output end of the clutch (B).

9. A compact intelligent curtain motor according to claim 1, characterized in that: The top of the outer frame (1) is provided with a power interface, which is electrically connected to the power module (6).

10. A compact intelligent curtain motor according to claim 4, characterized in that: The belt gear (B9) is located in the inner cavity of the curtain guide rail (12) and is used to directly engage and drive the curtain belt.

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