A dual output drive device applied to an electric curtain

Abstract

The application provides a double-output driving device applied to an electric curtain, comprising a shell, a first gearbox, a driving motor, a control module and a second gearbox arranged in the shell in sequence, wherein the control module comprises a power board and a control board, one side output end of the driving motor is in transmission connection with the first gearbox, the other output end is in transmission connection with the second gearbox through a transmission shaft, and the transmission is arranged between the power board and the control board, the first gearbox, the driving motor, the control module and the second gearbox are integrated in the shell, the internal space of the device is reasonably arranged, the structure is compact, the size of the overall structure of the device and the occupied space are reduced, and product assembly and application are facilitated.

Description

Technical Field

[0001] This application relates to the field of electric curtains, and more specifically to a dual-output drive device for electric curtains. Background Technology

[0002] With the continuous development of smart homes, electric curtains are being used more and more widely. The reason why electric curtains can be operated electrically is mainly because they are equipped with a drive device. The drive devices of electric curtains are generally single motor single output drive devices, single motor dual output drive devices, and dual motor dual output drive devices.

[0003] Existing single-motor dual-output drive devices, such as the modular dual-output tubular motor disclosed in CN222706359U, have drive unit 2 connected to transmission unit 3 at both ends and integrated into housing 1, while drive unit 2 is externally connected to control unit 4, which is located on the outside of housing 1. This design has problems of complex structure and low assembly efficiency, and occupies more space for electric curtains, which is particularly prominent in space-constrained application environments, such as small windows or compact interior spaces, so improvements are urgently needed. Utility Model Content

[0004] This utility model aims to solve the problems of complex structure and space occupation of existing dual-output drive devices, and provides a compact dual-output drive device for electric curtains. The first gearbox, drive motor, control module and second gearbox are integrated into the housing, and the internal space of the device is reasonably arranged. The compact structure helps to reduce the size and space occupied by the overall structure of the device, and facilitates product assembly and application.

[0005] This application provides a dual-output drive device for electric curtains, including a housing, and a first gearbox, a drive motor, a control module, and a second gearbox sequentially disposed within the housing;

[0006] The control module includes a power board and a control board;

[0007] The drive motor has a first output end and a second output end at both ends. The first output end is connected to the first gearbox. The second output end has a drive shaft extending towards the second gearbox. The drive shaft passes between the power board and the control board and is connected to the second gearbox.

[0008] As described above, a dual-output drive device for electric curtains includes a housing comprising a detachably assembled first housing and a second housing, with a mounting cavity formed between the first housing and the second housing. A first gearbox, a drive motor, a control module, and a second gearbox are sequentially disposed within the mounting cavity.

[0009] As described above, in a dual-output drive device for electric curtains, the first and second housings have L-shaped longitudinal sections along their length. When the two are snapped together, they form a housing with an overall hollow cuboid structure.

[0010] As described above, a dual-output drive device for electric curtains has a plurality of first positioning slots on the inner wall of the first housing and / or the second housing, near the first gearbox side and a plurality of second positioning slots on the side near the second gearbox side.

[0011] A first positioning seat is fixed between the first gearbox and the drive motor, and the first positioning seat can be positioned and installed on the first positioning slot.

[0012] The second gearbox is fixedly provided with a second positioning seat, which can be positioned and installed on the second positioning slot.

[0013] As described above, a dual-output drive device for electric curtains includes a first gearbox comprising a first gearbox housing, and a first input planetary gear set, a first brake spring, and a first driven planetary gear set sequentially disposed within the first gearbox housing. The first input planetary gear set is connected to a first output end. The first input planetary gear set has a first positive drive portion and a first reverse drive portion extending toward the first driven planetary gear set. The first driven planetary gear set has a first driven portion extending toward the first input planetary gear set to the space between the first positive drive portion and the first reverse drive portion. The first brake spring is spirally sleeved around the first positive drive portion, the first reverse drive portion, and the first driven portion. The first brake spring has a first spring head end and a first spring tail end, with the first spring head end positioned between the first positive drive portion and the first driven portion. The end of the spring is positioned between the first driven part and the first reverse drive part. When the first input planetary gear set rotates forward, the first driven part contacts the first driven part and the first end of the spring, causing the first driven planetary gear set to rotate forward synchronously and causing the first brake spring to rotate, thus causing the first brake spring to retract inward. When the first input planetary gear set rotates in reverse, the first reverse drive part contacts the first driven part and the end of the first spring, causing the first driven planetary gear set to rotate in reverse synchronously and causing the first brake spring to rotate, thus causing the first brake spring to retract inward. When the first input planetary gear set is stationary and the first driven planetary gear set rotates relative to the first input planetary gear set, the first driven part contacts the first end of the spring or the end of the spring, causing the first brake spring to rotate, thus causing the first brake spring to expand outward and rub against the inner wall of the first transmission housing.

[0014] As described above, a dual-output drive device for electric curtains includes a second gearbox comprising at least a second gearbox housing, and a second input planetary gear set, a second brake spring, and a second driven planetary gear set sequentially disposed within the second gearbox housing. The second input planetary gear set is connected to a drive shaft. The second input planetary gear set has a second positive drive portion and a second reverse drive portion extending towards the second driven planetary gear set. The second driven planetary gear set has a second driven portion extending towards the second input planetary gear set to the space between the second positive drive portion and the second reverse drive portion. The second brake spring is spirally sleeved around the second positive drive portion, the second reverse drive portion, and the second driven portion. The second brake spring has a second spring head end and a second spring tail end, with the second spring head end positioned between the second positive drive portion and the second driven portion. The end of the spring is positioned between the second driven part and the second reverse drive part. When the second input planetary gear set rotates forward, the second driven part contacts the second driven part and the first end of the second spring, causing the second driven planetary gear set to rotate forward synchronously and causing the second brake spring to rotate, thus causing the second brake spring to retract inward. When the second input planetary gear set rotates in reverse, the second reverse drive part contacts the second driven part and the end of the second spring, causing the second driven planetary gear set to rotate in reverse synchronously and causing the second brake spring to rotate, thus causing the second brake spring to retract inward. When the second input planetary gear set is stationary and the second driven planetary gear set rotates relative to the second input planetary gear set, the second driven part contacts the first end or the end of the second spring, causing the second brake spring to rotate, thus causing the second brake spring to expand outward and rub against the inner wall of the second transmission housing.

[0015] As described above, in a dual-output drive device for electric curtains, a plurality of first brake springs are arranged side by side between the first input planetary gear set and the first driven planetary gear set; and a plurality of second brake springs are arranged side by side between the second input planetary gear set and the second driven planetary gear set.

[0016] As described above, in a dual-output drive device for electric curtains, a number of first transmission planetary gear sets are provided in the first transmission housing at the rear end of the first driven planetary gear set and are connected by gear transmission.

[0017] As described above, in a dual-output drive device for electric curtains, the second transmission housing is further provided with several sets of second transmission planetary gear sets connected by gear transmission at the rear end of the second driven planetary gear set.

[0018] As described above, a dual-output drive device for electric curtains has a first output hole and a second output hole at each end of the housing;

[0019] The output end of the first gearbox is located in the first output hole, and the first shaft coupling sleeve is detachably inserted into the output end of the first gearbox.

[0020] The output end of the second gearbox is located in the second output hole, and a second shaft coupling sleeve is detachably inserted into the output end of the second gearbox.

[0021] The first and second shaft couplings are provided with square or hexagonal slots.

[0022] As described above, in a dual-output drive device for electric curtains, a shock-absorbing ring for buffering is fitted between the outer periphery of the first gearbox and / or the second gearbox and the housing.

[0023] As described above, in a dual-output drive device for electric curtains, a shock-absorbing sleeve is provided around the outer periphery of the housing.

[0024] As described above, a dual-output drive device for electric curtains has a magnetic ring on the second output end of the drive motor, and a Hall element corresponding to and cooperating with the magnetic ring is provided on the control board.

[0025] Compared with the prior art, the beneficial effects of this application are as follows:

[0026] This application provides a dual-output drive device for electric curtains, including a housing, and a first gearbox, a drive motor, a control module, and a second gearbox sequentially disposed within the housing. The control module includes a power board and a control board. One output end of the drive motor is connected to the first gearbox via a drive shaft, and the other output end is connected to the second gearbox via a drive shaft, with the drive shaft passing between the power board and the control board. This application integrates the first gearbox, the drive motor, the control module, and the second gearbox within the housing, rationally arranging the internal space of the device, resulting in a compact structure. This helps to reduce the overall size and space occupied by the device, facilitating product assembly and application. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0028] Figure 1 This is a schematic diagram of the structure of a dual-output drive device applied to electric curtains in an embodiment of this application;

[0029] Figure 2 This is a schematic diagram of the internal structure of a dual-output drive device for electric curtains according to an embodiment of this application;

[0030] Figure 3 This is a cross-sectional schematic diagram of a dual-output drive device applied to electric curtains in an embodiment of this application;

[0031] Figure 4 This is an exploded view of a dual-output drive device applied to electric curtains in an embodiment of this application;

[0032] Figure 5 This is a cross-sectional schematic diagram of the first gearbox / second gearbox in the embodiments of this application;

[0033] Figure 6 This is a schematic diagram of the internal structure of the first gearbox / second gearbox in the embodiments of this application;

[0034] Figure 7 This is a partially exploded schematic diagram of the first gearbox / second gearbox in the embodiments of this application;

[0035] Figure 8 This is an exploded view of the first gearbox / second gearbox in the embodiments of this application. Detailed Implementation

[0036] like Figure 1-8 As shown, this application provides a dual-output drive device for electric curtains, including a housing 1, and a first gearbox 2, a drive motor 3, a control module 4, and a second gearbox 5 sequentially disposed within the housing 1; the control module 4 includes a power board 41 and a control board 42; the drive motor 3 has a first output end 31 and a second output end 32 at both ends, the first output end 31 is connected to the first gearbox 2, and the second output end 32 has a drive shaft 30 extending towards the second gearbox 5, the drive shaft 30 passes between the power board 41 and the control board 42 and is connected to the second gearbox 5.

[0037] The dual-output drive device for electric curtains according to the embodiments of this application includes a housing, and a first gearbox, a drive motor, a control module, and a second gearbox sequentially disposed within the housing. The control module includes a power board and a control board. One output end of the drive motor is connected to the first gearbox, and the other output end is connected to the second gearbox via a drive shaft, with the drive shaft passing between the power board and the control board. This application integrates the first gearbox, drive motor, control module, and second gearbox within the housing, rationally arranging the internal space of the device, resulting in a compact structure. This helps to reduce the overall size and space occupied by the device, facilitating product assembly and application.

[0038] Furthermore, in conventional electric curtain drive devices, the housing for the motor and reducer is a hollow tubular structure with openings at both ends to allow the motor and reducer to be inserted axially from these openings. This makes it difficult to assemble and disassemble the motor and reducer relative to the housing. In this embodiment, to facilitate component installation, such as... Figure 3-4As shown, the housing 1 includes a first housing 11 and a second housing 12 that can be detachably assembled. The first housing 11 and the second housing 12 form an installation cavity 10. The first gearbox 2, the drive motor 3, the control module 4 and the second gearbox 5 are sequentially arranged in the installation cavity 10. The housing in this embodiment adopts a detachable cover assembly method, which can improve the assembly and disassembly efficiency.

[0039] Furthermore, in this embodiment, the first shell 11 and the second shell 12 have L-shaped longitudinal sections along their length. When they are fastened together, they form a shell 1 with an overall hollow cuboid structure, such as... Figure 4 As shown, the first shell 11 and the second shell 12 with L-shaped longitudinal sections are mirror symmetrical structures, and their interiors form hollow triangular prism structures. This structure facilitates the installation of components. When the two shells are fitted together, they form a square elongated column shell 1. More preferably, the end faces where the two shells are connected have protrusions and recesses for easy snap-fit ​​engagement, which can improve installation stability and waterproofing. Specifically, in the embodiments of this application, the connection between the first shell 11 and the second shell 12 is locked by multiple sets of fasteners to further improve installation stability. This application adopts a shell with a half-structure, which can be easily disassembled and assembled.

[0040] Furthermore, to improve assembly efficiency and installation stability, such as Figure 3-4 As shown in the specific embodiment of this application, the inner walls of the first housing 11 and the second housing 12 are provided with a plurality of first positioning slots 13 near the first gearbox 2 and a plurality of second positioning slots 14 near the second gearbox 5; a first positioning seat 15 is fixed between the first gearbox 2 and the drive motor 3, and the first positioning seat 15 can be positioned and installed on the first positioning slot 13; a second positioning seat 16 is fixed on the second gearbox 4, and the second positioning seat 16 can be positioned and installed on the second positioning slot 14. Specifically, the positioning slots are symmetrically arranged on both sides of the connection between the first housing 11 and the second housing 12, and the positioning seat is provided with a protruding structure that can be adapted to be embedded in the positioning slot. During assembly, the first gearbox 2 and the drive motor 3 are first installed with the first positioning seat 15, and then the first positioning seat 15 is inserted into the first positioning slot 13; and the second positioning seat 16 is installed on the second gearbox 4, and then the second positioning seat 16 is inserted into the second positioning slot 14. This facilitates positioning and assembly, has the advantage of simple installation, and improves the stability of the internal space of the assembly.

[0041] Furthermore, such as Figure 5-8 As shown in the specific embodiment of this application, the first gearbox 2 and the second gearbox 5 have the same structure and are respectively disposed at both ends of the housing, for transmitting the torque force output by the drive motor 3 to the lifting component;

[0042] The first gearbox 2 includes a first gearbox housing 20, and a first input planetary gear set 21, a first brake spring 23, and a first driven planetary gear set 22 sequentially disposed within the first gearbox housing 20. The first input planetary gear set 21 is connected to the first output end 31. The first input planetary gear set 21 has a first positive drive portion 212 and a first reverse drive portion 213 extending toward the first driven planetary gear set 22. The first driven planetary gear set 22 has a first driven portion 221 extending toward the first input planetary gear set 21 to the space between the first positive drive portion 212 and the first reverse drive portion 213. The first brake spring 23 is spirally sleeved around the outer periphery of the first positive drive portion 212, the first reverse drive portion 213, and the first driven portion 221. The first brake spring 23 has a first spring head end 231 and a first spring tail end 232. The first spring head end 231 is located between the first positive drive portion 212 and the first driven portion 221, and the first spring tail end 232 is located at the outer periphery of the first driven portion 221. Between the first driven part 221 and the first reverse drive part 213, when the first input planetary gear set 21 rotates forward, the first driven part 221 and the first spring head end 231 are contacted by the first forward drive part 212, which drives the first driven planetary gear set 22 to rotate forward synchronously, and drives the first brake spring 23 to rotate, causing the first brake spring 23 to retract inward. When the first input planetary gear set 21 rotates in reverse, the first reverse drive part 213 is contacted by the first driven part 221 and the first spring end 232, which drives the first driven planetary gear set 22 to rotate in reverse synchronously, and drives the first brake spring 23 to rotate, causing the first brake spring 23 to retract inward. When the first input planetary gear set 21 is stationary and the first driven planetary gear set 22 rotates relative to the first input planetary gear set 21, the first driven part 221 contacts the first spring head end 231 or the first spring end 232, which drives the first brake spring 23 to rotate, causing the first brake spring 23 to expand outward to make frictional contact with the inner wall of the first transmission housing 20.

[0043] The second gearbox 5 includes at least a second gearbox housing 50, and a second input planetary gear set 51, a second brake spring 53, and a second driven planetary gear set 52 sequentially disposed within the second gearbox housing 50. The second input planetary gear set 51 is connected to the drive shaft 30. The second input planetary gear set 51 has a second positive drive portion 512 and a second reverse drive portion 513 extending toward the second driven planetary gear set 52. The second driven planetary gear set 52 has a second driven portion 521 extending toward the second input planetary gear set 51 to the area between the second positive drive portion 512 and the second reverse drive portion 513. The second brake spring 53 is spirally sleeved around the second positive drive portion 512, the second reverse drive portion 513, and the second driven portion 521. The second brake spring 53 has a second spring head end 531 and a second spring tail end 532. The second spring head end 531 is located between the second positive drive portion 512 and the second driven portion 521, and the second spring tail end 532 is located at the... Between the second driven part 521 and the second reverse drive part 513, when the second input planetary gear set 51 rotates forward, the second driven part 521 and the first end 531 of the second spring are touched by the second forward drive part 512, which drives the second driven planetary gear set 52 to rotate forward synchronously and drives the second brake spring 53 to rotate, causing the second brake spring 53 to retract. When the second input planetary gear set 51 rotates in reverse, the second reverse drive part 513 touches the second driven part 521 and the end 532 of the second spring, which drives the second driven planetary gear set 52 to rotate in reverse synchronously and drives the second brake spring 53 to rotate, causing the second brake spring 53 to retract. When the second input planetary gear set 51 is stationary and the second driven planetary gear set 52 rotates relative to the second input planetary gear set 51, the second driven part 521 contacts the first end 531 or the end 532 of the second spring, which drives the second brake spring 53 to rotate, causing the second brake spring 53 to expand outward to make frictional contact with the inner wall of the second transmission housing 50.

[0044] The specific working principle of the brake structure in this application can be found in a spring brake disclosed in CN219263034U. It utilizes the interaction between the inner wall of the housing and the outer circumferential surface of the brake spring to achieve deceleration and braking. Specifically, when the first input planetary gear set 21 / second input planetary gear set 51 rotates with the drive motor, the brake spring contracts radially, creating a gap between the outer circumferential surface of the brake spring and the inner wall of the housing. This gap does not affect the rotation of the lifting component. Through the setting of this gap, the first driven planetary gear set 22 / second driven planetary gear set 52 can be relatively circumferentially opposite to the first… When the input planetary gear set 21 / second input planetary gear set 51 rotates, after the drive motor stops rotating, the first driven planetary gear set 22 / second driven planetary gear set 52 rotates relative to the first input planetary gear set 21 / second input planetary gear set 51 due to the weight of the lifting component. At this time, the brake spring expands radially outward, and the outer circumferential surface of the brake spring gradually approaches and contacts the inner wall of the housing, thereby achieving the effect of deceleration and braking. For heavier lifting components, their weight can be converted into braking friction, which can achieve more stable braking and prevent the occurrence of safety accidents.

[0045] More specifically, the internal structure principle of the planetary gear set in this application adopts the common planetary secondary gear set structure of reducers in the existing field, specifically, such as... Figure 5-8 As shown, the first forward drive unit 212 and the first reverse drive unit 213 are disposed on the two end faces of the C-shaped protrusion structure on the rear side of the planetary carrier, and the first driven unit 221 is disposed on the protrusion on the front side of the planetary carrier. Regardless of whether it rotates forward or reverse, it pushes the first brake spring in the direction of the first brake spring's helix, thereby causing the first brake spring to retract radially inward. Similarly, the second forward drive unit 512 and the second reverse drive unit 513 are disposed on the two end faces of the C-shaped protrusion structure on the rear side of the planetary carrier, and the second driven unit 521 is disposed on the protrusion on the front side of the planetary carrier. Regardless of whether it rotates forward or reverse, it pushes the second brake spring in the opposite direction of the second brake spring's helix, thereby causing the second brake spring to expand radially outward.

[0046] More specifically, since the brake spring is a coiled strip structure, it gradually contracts inward or expands outward from the end during braking. To improve the braking effect, it is preferable that multiple first brake springs 23 are arranged side by side between the first input planetary gear set 21 and the first driven planetary gear set 22; and multiple second brake springs 53 are arranged side by side between the second input planetary gear set 51 and the second driven planetary gear set 52. The multi-segment brake spring structure can make the transmission more sensitive and the braking effect better. In the specific embodiment of this application, two brake springs are used together, which can further improve the braking response speed. Of course, the specific number of brake springs can be adjusted according to the situation.

[0047] Specifically, the first transmission housing 20 is provided with several sets of first transmission planetary gear sets 24 connected by gear transmission at the rear end of the first driven planetary gear set 22; the second transmission housing 50 is provided with several sets of second transmission planetary gear sets 54 connected by gear transmission at the rear end of the second driven planetary gear set 52. The reducer of this application adopts a multi-stage planetary gear structure, which can better output torque and improve output stability.

[0048] Furthermore, the housing 1 has a first output hole 101 and a second output hole 102 at both ends; the output end of the first gearbox 2 is located in the first output hole 101, and a first shaft coupling sleeve 103 is detachably inserted into the output end of the first gearbox 2; the output end of the second gearbox 5 is located in the second output hole 102, and a second shaft coupling sleeve 104 is detachably inserted into the output end of the second gearbox 5; the plug-in shaft coupling sleeve structure facilitates application to different output shaft types, increasing product applicability, for example, such as Figure 8 As shown in the specific embodiment of this application, the first shaft sleeve 103 and the second shaft sleeve 104 are provided with square or hexagonal slots, which can be used for square or hexagonal output shafts and increase application scenarios.

[0049] Furthermore, to improve the internal shock absorption effect of the product, in a specific embodiment of this application, a shock-absorbing ring 17 for buffering is sleeved between the outer periphery of the first gearbox 2 and the second gearbox 5 and the housing 1; more preferably, to improve the shock absorption effect when the device is used, a shock-absorbing sleeve 18 is sleeved on the outer periphery of the housing 1, so that the vibration generated by the motor operation can be filtered by the shock-absorbing sleeve, thereby playing the role of vibration reduction and noise reduction.

[0050] Furthermore, a magnetic ring 33 is provided on the second output terminal 32 of the drive motor 3, and a Hall element 43 corresponding to and cooperating with the magnetic ring 33 is provided on the control board 42. The Hall element 43 is used to control the operation of the drive motor on the one hand, and can also cooperate with the output terminal position detector to provide feedback on the position information of the curtain on the other hand. This design can accurately detect the motor output angle and driving direction, so that the control module can better control the drive motor.

[0051] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual-output drive device for electric curtains, characterized in that: It includes a housing, and a first gearbox, a drive motor, a control module, and a second gearbox sequentially disposed within the housing; The control module includes a power board and a control board; The drive motor has a first output end and a second output end at both ends. The first output end is connected to the first gearbox. The second output end has a drive shaft extending towards the second gearbox. The drive shaft passes between the power board and the control board and is connected to the second gearbox. The housing includes a detachable first housing and a second housing, with a mounting cavity formed between the first housing and the second housing. The first gearbox, the drive motor, the control module, and the second gearbox are sequentially disposed within the mounting cavity.

2. The dual-output drive device for electric curtains according to claim 1, characterized in that: The first and second shells have L-shaped longitudinal sections along their length. When they are snapped together, they form a shell with an overall hollow rectangular parallelepiped structure.

3. A dual-output drive device for electric curtains according to claim 1 or 2, characterized in that: The inner walls of the first housing and / or the second housing are provided with a plurality of first positioning slots near the first gearbox and a plurality of second positioning slots near the second gearbox. A first positioning seat is fixed between the first gearbox and the drive motor, and the first positioning seat can be positioned and installed on the first positioning slot. The second gearbox is fixedly provided with a second positioning seat, which can be positioned and installed on the second positioning slot.

4. The dual-output drive device for electric curtains according to claim 1, characterized in that: The first gearbox includes a first gearbox housing, and a first input planetary gear set, a first brake spring, and a first driven planetary gear set sequentially disposed within the first gearbox housing. The first input planetary gear set is drive-connected to a first output end. The first input planetary gear set has a first positive drive portion and a first negative drive portion extending toward the first driven planetary gear set. The first driven planetary gear set has a first driven portion extending toward the first input planetary gear set to the area between the first positive drive portion and the first negative drive portion. The first brake spring is spirally sleeved around the outer periphery of the first positive drive portion, the first negative drive portion, and the first driven portion. The first brake spring has a first spring head end and a first spring tail end. The first spring head end is located between the first positive drive portion and the first driven portion, and the first spring tail end is located between the first driven portion and the first driven portion. Between the reverse drive units, when the first input planetary gear set rotates forward, the first forward drive unit contacts the first driven unit and the first spring's head end, causing the first driven planetary gear set to rotate synchronously forward, and also causing the first brake spring to rotate, causing the first brake spring to retract inward. When the first input planetary gear set rotates in reverse, the first reverse drive unit contacts the first driven unit and the first spring's end, causing the first driven planetary gear set to rotate synchronously in reverse, and also causing the first brake spring to rotate, causing the first brake spring to retract inward. When the first input planetary gear set is stationary and the first driven planetary gear set rotates relative to the first input planetary gear set, the first driven unit contacts the first spring's head end or the first spring's end, causing the first brake spring to rotate, causing the first brake spring to expand outward to make frictional contact with the inner wall of the first transmission housing; and / or The second gearbox includes at least a second gearbox housing, and a second input planetary gear set, a second brake spring, and a second driven planetary gear set sequentially disposed within the second gearbox housing. The second input planetary gear set is connected to a drive shaft. The second input planetary gear set has a second positive drive portion and a second reverse drive portion extending towards the second driven planetary gear set. The second driven planetary gear set has a second driven portion extending towards the second input planetary gear set to the area between the second positive drive portion and the second reverse drive portion. The second brake spring is spirally sleeved around the second positive drive portion, the second reverse drive portion, and the second driven portion. The second brake spring has a second spring head end and a second spring tail end. The second spring head end is located between the second positive drive portion and the second driven portion, and the second spring tail end is located within the second driven portion. Between the second input planetary gear set and the second reverse drive unit, when the second input planetary gear set rotates forward, the second forward drive unit contacts the second driven part and the first end of the second spring, causing the second driven planetary gear set to rotate forward synchronously, and causing the second brake spring to rotate, causing the second brake spring to retract inward. When the second input planetary gear set rotates in reverse, the second reverse drive unit contacts the second driven part and the end of the second spring, causing the second driven planetary gear set to rotate in reverse synchronously, and causing the second brake spring to rotate, causing the second brake spring to retract inward. When the second input planetary gear set is stationary and the second driven planetary gear set rotates relative to the second input planetary gear set, the second driven part contacts the first end or the end of the second spring, causing the second brake spring to rotate, causing the second brake spring to expand outward to make frictional contact with the inner wall of the second transmission housing.

5. A dual-output drive device for electric curtains according to claim 4, characterized in that: Multiple first brake springs are arranged side by side between the first input planetary gear set and the first driven planetary gear set; Multiple second brake springs are arranged side-by-side between the second input planetary gear set and the second driven planetary gear set.

6. A dual-output drive device for electric curtains according to claim 4, characterized in that: Inside the first transmission housing, at the rear end of the first driven planetary gear set, there are also several sets of first transmission planetary gear sets connected by gear transmission. Inside the second transmission housing, at the rear end of the second driven planetary gear set, there are also several sets of second transmission planetary gear sets connected by gear transmission.

7. A dual-output drive device for electric curtains according to claim 1, characterized in that: The housing is provided with a first output hole and a second output hole at both ends; The output end of the first gearbox is located in the first output hole, and the first shaft coupling sleeve is detachably inserted into the output end of the first gearbox. The output end of the second gearbox is located in the second output hole, and a second shaft coupling sleeve is detachably inserted into the output end of the second gearbox. The first and second shaft couplings are provided with square or hexagonal slots.

8. A dual-output drive device for electric curtains according to claim 1, characterized in that: A damping ring for cushioning is fitted between the outer periphery of the first gearbox and / or the second gearbox and the housing; and / or The outer periphery of the housing is fitted with a shock-absorbing sleeve.

9. A dual-output drive device for electric curtains according to claim 1, characterized in that: A magnetic ring is provided on the second output terminal of the drive motor, and a Hall element corresponding to the magnetic ring is provided on the control board.

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