Electric curtain driving mechanism and electric curtain driving device applying same

Abstract

The application provides an electric curtain driving mechanism and an electric curtain driving device using the same. The electric curtain driving mechanism comprises a driving shell, a driving assembly and a speed reduction assembly. The driving shell is internally provided with a speed reduction accommodating cavity; the driving assembly is arranged in the speed reduction accommodating cavity and comprises a first bearing and a rotor disc, the rotor disc is movably connected with the driving shell via the first bearing; the speed reduction assembly is arranged in the speed reduction accommodating cavity and comprises a gear ring and a planetary speed reduction component, the gear ring is fixedly connected with the driving shell, the planetary speed reduction component is engaged with the gear ring, the planetary speed reduction component is drivingly connected with the rotor disc and is used for outputting a rotating torque. The electric curtain driving device comprises a curtain winding and unwinding end cover box and the electric curtain driving mechanism, and the electric curtain driving mechanism is detachably arranged in the curtain winding and unwinding end cover box.

Description

Technical Field

[0001] This application relates to the field of electric curtain technology, and in particular to an electric curtain drive mechanism and an electric curtain drive device using the same. Background Technology

[0002] With the continuous development and popularization of smart home technology, motorized curtains, as an important product for improving living quality and convenience, have been widely used in homes and commercial spaces. The stable operation of motorized curtains relies on its core drive unit, namely the retractable end box installed at the end of the curtain track. This end box typically integrates a drive motor, a reduction mechanism, and a winding component for coiling the pull cord or belt within a limited housing space. The compactness and reliability of its overall design directly affect the product's ease of installation, aesthetics, and market competitiveness. To drive the relatively heavy curtain curtain to open and close smoothly, the drive motor within the end box needs to be reduced in speed and torque increased by the reduction mechanism to provide sufficient output torque. In existing technology, there are two main schemes for the reduction mechanism to achieve this function: one is to use a multi-stage cylindrical gear set in series transmission, and the other is to use a worm gear mechanism. These two technical solutions have been used for a long time due to their simple structure and mature technology, and can meet the basic driving torque requirements, forming the basis of current motorized curtain drive technology.

[0003] However, the aforementioned traditional reduction schemes have certain limitations in miniaturization, becoming a major technical bottleneck restricting further miniaturization and weight reduction of the motorized curtain retractor box. Specifically, the multi-stage cylindrical gear reduction scheme requires multiple gears to be arranged along the motor output shaft to achieve a large reduction ratio, inevitably resulting in an excessively long axial dimension of the reduction mechanism. While the worm gear mechanism scheme can achieve a large single-stage transmission ratio, its transmission efficiency is relatively low, and to ensure output torque and meshing strength, the radial dimensions of the worm gear and worm itself must be large. These factors combined result in the current retractor box being bulky and cumbersome, contradicting the modern home design trend of simplicity, compactness, and concealment, and significantly increasing transportation and logistics costs.

[0004] How to solve the above problems is something that those skilled in the art need to consider. Utility Model Content

[0005] To address the problems in the prior art, this application provides an electric curtain drive mechanism and an electric curtain drive device using the same.

[0006] This application provides an electric curtain drive mechanism, including a drive housing, a drive assembly, and a reduction assembly. The drive housing has a reduction receiving cavity inside; the drive assembly is disposed within the reduction receiving cavity and includes a first bearing and a moving disc, the moving disc being movably connected to the drive housing via the first bearing; the reduction assembly is disposed within the reduction receiving cavity and includes a gear ring and a planetary reduction component, the gear ring being fixedly connected to the drive housing, the planetary reduction component meshing with the gear ring, and the planetary reduction component being drivenly connected to the moving disc for outputting rotational torque.

[0007] Understandably, the electric curtain drive mechanism provided in this application integrates the drive component, which serves as the power source, and the reduction component, which is used for deceleration and torque amplification, in a coaxial stacked manner within the same reduction housing cavity. The mover disc is directly driven by the planetary reduction component, achieving tight coupling and space sharing between the drive and reduction components. Compared to prior art solutions that use multi-stage cylindrical gears in series (to solve the problem of excessive axial length) or worm gears (to solve the problems of excessive radial length and low efficiency), this application utilizes the advantages of planetary gear transmission—compact structure, large transmission ratio, strong load-bearing capacity, and high transmission efficiency—to shorten the overall axial dimension of the drive mechanism and effectively control the radial dimension. While ensuring torque, it solves the technical problems of the large size and heavy structure of existing drive mechanisms. The electric curtain drive mechanism of this application can achieve miniaturization and lightweight design, meeting the modern home's design requirements for simplicity, compactness, and concealment, while also reducing logistics costs.

[0008] In one embodiment, the drive housing includes an upper drive housing and a lower drive housing, which are detachably connected by a snap-fit ​​structure.

[0009] Understandably, using a snap-fit ​​structure to connect the upper and lower drive housings simplifies the assembly process of the drive housing, eliminating the need for additional fasteners such as screws. This improves assembly efficiency on the production line and reduces the weight of the electric curtain drive mechanism to some extent. Simultaneously, the detachable connection between the upper and lower drive housings facilitates future product repairs and replacement of core components, reducing maintenance difficulty and costs.

[0010] In one embodiment, a toothed sleeve positioning groove is provided at the engagement point of the upper drive housing and the lower drive housing, and a toothed sleeve positioning protrusion is provided on the outer periphery of the toothed ring, the toothed sleeve positioning protrusion being engaged in the toothed sleeve positioning groove.

[0011] Understandably, by setting a gear sleeve positioning groove at the engagement point of the upper and lower drive housings, which cooperates with the gear sleeve positioning protrusion on the gear ring, rapid and precise positioning of the gear ring can be achieved during assembly, ensuring that it maintains the correct meshing relationship with the planetary reduction components. Furthermore, the clamping force after the upper and lower drive housings are closed effectively prevents the gear ring from rotating or axially moving when subjected to reaction torque, ensuring the stability of the reduction assembly transmission and the reliability of its long-term operation.

[0012] In one embodiment, the upper drive housing includes an upper housing body and a bearing housing portion. The bearing housing portion is connected to the upper housing body and protrudes toward the lower drive housing. A first bearing is disposed in the cavity of the bearing housing portion and located on the side of the upper drive housing away from the lower drive housing. The lower drive housing includes a lower housing body with a through drive hole. The through drive hole and the bearing housing portion are coaxially arranged along the stacking direction of the drive assembly and the reduction assembly. The reduction torque output end of the planetary reduction component is exposed through the through drive hole. The upper housing body and the lower housing body are detachably connected.

[0013] Understandably, the bearing housing provides a stable and precise mounting position for the first bearing, ensuring the smooth rotation and coaxiality of the moving disc. The coaxial arrangement of the bearing housing, moving disc, planetary reduction gear, and drive through hole along the stacking direction ensures a coaxial and continuous force flow path from power input to torque output, reducing transmission errors, vibration, and noise that may be caused by eccentricity or misalignment. While maintaining a low thickness, this improves the overall operating accuracy and service life of the electric curtain drive mechanism.

[0014] In one embodiment, the drive assembly further includes a first drive locking component and a second drive locking component. The first drive locking component locks the moving disc and the inner ring of the first bearing, and the second drive locking component locks the bearing receiving portion and the outer ring of the first bearing. The inner ring of the first bearing is rotatably connected to the outer ring of the first bearing.

[0015] Understandably, by setting up the first and second drive locking components, the inner and outer rings of the first bearing are reliably fixed, respectively. This ensures that the rotational movement of the moving disc can be achieved through relative rotation between the inner and outer rings of the first bearing, preventing undesirable relative sliding or free-spinning between the moving disc and the inner ring of the first bearing, or between the outer ring of the first bearing and the drive housing (bearing housing). Simultaneously, the first bearing is located in the cavity of the bearing housing and on the side of the drive housing away from the drive housing. This utilizes the drive housing to support the first bearing, avoiding the introduction of other support structures that would increase structural dimensions. Furthermore, the mounting point of the first bearing is located on the outside of the drive housing, facilitating the installation of the first and second drive locking components, ensuring a small overall thickness while also considering assembly efficiency.

[0016] In one embodiment, the drive assembly further includes a stator component, which is disposed between the drive upper housing and the mover disk, and located on the side of the mover disk away from the reduction assembly; the mover disk has a spline groove on the side facing the reduction assembly, and the spline groove, drive through hole and bearing receiving part are coaxially arranged along the stacking direction of the drive assembly and the reduction assembly; the planetary reduction component includes a sun gear, part of which is disposed in the spline groove and drivenly connected to the mover disk via the spline groove.

[0017] Understandably, the stator and mover (as the motor rotor) configuration enables the conversion of electrical energy into mechanical energy. Simultaneously, by directly creating a spline groove on the mover and engaging the sun gear (which serves as the input end of the planetary reduction gear), a drive connection between the motor rotor and the input end of the reduction assembly is achieved. Eliminating intermediate transmission components such as couplings further shortens the axial dimension, improves transmission rigidity and response speed, resulting in a more compact structure, shorter transmission chain, and higher efficiency for the electric curtain drive mechanism.

[0018] In one embodiment, the planetary reduction gear includes a sun gear, multiple planet gears, a planetary gear carrier, and a planetary carrier. The sun gear is driven and connected to the mover disk. The multiple planet gears are arranged around the sun gear and mesh with the sun gear and the ring gear, respectively. The multiple planet gears are rotatably disposed between the planetary gear carrier and the planetary carrier to drive the planetary gear carrier to rotate.

[0019] Understandably, power is transmitted from the mover to the sun gear. The sun gear drives multiple planetary gears to perform planetary motion within a fixed gear ring. The revolution of the planetary gears drives the planetary gear carrier to rotate, thus achieving speed reduction and torque increase, which is then output as torque. Multiple planetary gears are rotatably positioned between the planetary gear carrier and the fixed planetary gear carrier, which both fixes the position of the planetary gears and integrates them with the planetary gear carrier into a single rotating unit. The design of multiple planetary gears sharing the load gives the reduction assembly a higher load-bearing capacity and impact resistance than a single pair of gears within the same volume. Furthermore, the symmetrical structural layout helps balance radial forces, making the transmission smoother and improving the quietness of the electric curtain drive mechanism.

[0020] In one embodiment, the reduction assembly further includes a second bearing, which is disposed around the planetary gear carrier and located between the planetary gear carrier and the gear ring. The inner ring of the second bearing is connected to the planetary gear carrier, and the outer ring of the second bearing is connected to the gear ring; the inner ring and the outer ring of the second bearing are rotatably connected.

[0021] Understandably, by setting a second bearing to support the planetary gear carrier, which serves as the output component, stable rotational support is provided for the torque output end. While transmitting large torques, the planetary gear carrier bears radial and axial loads. The introduction of the second bearing precisely constrains its motion trajectory, effectively absorbing and dispersing these loads, preventing the planetary gear carrier from tilting or radially wobbling under load, ensuring the smoothness and accuracy of the output shaft rotation, reducing frictional losses, and extending the service life of the reduction assembly. Furthermore, the electric curtain drive mechanism provided in this application, with a first bearing corresponding to the drive assembly and a second bearing corresponding to the reduction assembly, ensures both the accuracy and reliability of the rotational transmission process, while avoiding over-positioning, increased production costs, and excessive overall weight caused by introducing too many bearings. This ensures that the electric curtain drive mechanism meets functional requirements while reducing production and logistics costs.

[0022] In one embodiment, the lower end of the outer side of the planetary gear carrier has a first stepped structure, and the upper end of the inner side of the gear ring has a second stepped structure. The second bearing is sandwiched between the first stepped structure and the second stepped structure. The inner ring of the second bearing abuts against the first stepped structure, and the outer ring of the second bearing abuts against the second stepped structure.

[0023] Understandably, by setting a first and second step structure that cooperates with each other on the planetary gear carrier and the gear ring, a bidirectional axial positioning is provided for the second bearing. During assembly, the second bearing can be easily confined to a predetermined position, effectively preventing axial movement during operation and ensuring that the planetary gear carrier is always in the correct axial working position. Furthermore, the structure is simple and reliable, easy to process and assemble, and guarantees the stability and reliability of the output end at a low cost. On the other hand, based on the characteristic of the axially stacked arrangement of the reduction components, the second bearing is clamped between the gear ring and the planetary gear carrier, achieving positioning of the second bearing without introducing other additional fixing structures. This maintains the low thickness of the electric curtain drive mechanism while improving the operating accuracy and service life of the entire electric curtain drive mechanism.

[0024] This application also provides an electric curtain drive device, including a curtain retraction end cover box and an electric curtain drive mechanism as described in any of the above embodiments, wherein the electric curtain drive mechanism is detachably disposed within the curtain retraction end cover box.

[0025] Understandably, applying the aforementioned electric curtain drive mechanism, which boasts advantages in miniaturization, lightweight design, and high integration, to an electric curtain drive unit significantly reduces the size and weight of the entire drive unit (i.e., the curtain retraction end cover box), resulting in a more refined and compact appearance that better integrates into modern home environments. Simultaneously, the detachable design between the drive mechanism and the end cover box standardizes and universalizes the core power module, facilitating later sales, transportation, maintenance, and product iteration. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of an electric curtain drive mechanism provided in an embodiment of this application.

[0027] Figure 2 This is a three-dimensional schematic diagram of the electric curtain drive mechanism provided in an embodiment of this application from another angle.

[0028] Figure 3 yes Figure 2 A cross-sectional view along the III-III direction.

[0029] Figure 4 yes Figure 2 A cross-sectional view along the IV-IV direction.

[0030] Figure 5 This is a partial perspective view of the electric curtain drive mechanism provided in the embodiments of this application.

[0031] Figure 6 This is a partial perspective view of the electric curtain drive mechanism provided in the embodiments of this application.

[0032] Figure 7 This is a partial perspective view of the electric curtain drive mechanism provided in the embodiments of this application.

[0033] Figure 8 This is a partial perspective view of the electric curtain drive mechanism provided in the embodiments of this application.

[0034] Figure 9 This is a partial perspective view of the electric curtain drive mechanism provided in the embodiments of this application.

[0035] Figure 10 This is a perspective view of the electric curtain drive device provided in the embodiments of this application.

[0036] Explanation of reference numerals in the attached drawings: 11. Drive housing; 110. Reduction chamber; 111. Upper drive housing; 1111. Upper housing body; 1112. Bearing housing; 112. Lower drive housing; 1121. Lower housing body; 1122. Drive through hole; 113. Drive cover plate; 114. Hook structure; 115. Locking structure; 116. Gear sleeve positioning groove; 12. Drive assembly; 121. Moving disc; 1210. Permanent magnet; 1211. Spline groove; 122. Stator assembly; 123. First bearing; 124. First drive locking component; 1241. First locking cover; 1242. First locking bolt; 125. Second drive locking component; 1251. Second locking bolt. 1252. Cover; 13. Second locking bolt; 14. Reduction assembly; 15. Gear ring; 16. Gear sleeve positioning protrusion; 17. Second step structure; 18. Planetary reduction component; 19. Sun gear; 10. First transmission part; 11. Second transmission part; 12. Planetary gear; 13. Planetary transmission frame; 14. First step structure; 15. Planetary fixing frame; 16. Third step structure; 17. Drive positioning shaft; 18. Reduction positioning shaft; 19. Reduction locking bolt; 10. Second bearing; 10. Drive electronic control assembly; 10. Electric curtain drive device; 11. Curtain retraction end cover box. Detailed Implementation

[0037] The following is in conjunction with the appendix Figures 1 to 10 This application will be described in further detail below.

[0038] The technical solutions in the embodiments of this application will be further described in detail below with reference to the accompanying drawings. The described embodiments are only possible technical implementations of this application, but are not limited thereto. Other embodiments obtained by those skilled in the art in conjunction with the embodiments of this application without creative effort are also within the protection scope of this application.

[0039] like Figures 1 to 4 As shown, in one embodiment, an electric curtain drive mechanism includes a drive housing 11, a drive assembly 12, and a reduction assembly 13. The drive housing 11 has a reduction receiving cavity 110 inside; the drive assembly 12 is disposed within the reduction receiving cavity 110, and includes a first bearing 123 and a moving disk 121, the moving disk 121 being movably connected to the drive housing 11 via the first bearing 123; the reduction assembly 13 is disposed within the reduction receiving cavity 110, and includes a gear ring 131 and a planetary reduction component 132, the gear ring 131 being fixedly connected to the drive housing 11, the planetary reduction component 132 meshing with the gear ring 131, and the planetary reduction component 132 being drivenly connected to the moving disk 121 for outputting rotational torque.

[0040] Understandably, the electric curtain drive mechanism provided in this application integrates the drive component 12, which serves as the power source, and the reduction component 13, which is used for speed reduction and torque amplification, in a coaxial stacked manner within the same reduction housing cavity 110. The mover disk 121 is directly driven by the planetary reduction component 132, achieving tight coupling and space sharing between the drive component 12 and the reduction component 13. This application utilizes the advantages of planetary gear transmission, such as compact structure, large transmission ratio, strong load-bearing capacity, and high transmission efficiency, to shorten the overall axial dimension of the drive mechanism and effectively control the radial dimension. While ensuring torque, it solves the technical problems of the large size and heavy structure of existing drive mechanisms. The electric curtain drive mechanism of this application can achieve miniaturization and lightweighting, meeting the design requirements of modern homes for simplicity, compactness, and concealment, while also reducing logistics costs.

[0041] In this embodiment, the electric curtain drive mechanism has a flattened overall structure. The drive housing 11 forms the outer contour and internal mounting reference of the electric curtain drive mechanism, and the deceleration cavity 110 formed inside it provides an integrated mounting space for the drive assembly 12 and the deceleration assembly 13. The mover disk 121 (e.g., a motor rotor containing a permanent magnet 1210) and the planetary reduction component 132 for deceleration and torque amplification are closely stacked in the axial direction. The mover disk 121 forms a rotational support with the drive housing 11 through the first bearing 123, ensuring its stable rotation. At the same time, the mover disk 121 is directly connected to the component that serves as the input end of the planetary reduction component 132, transmitting the rotational motion to the deceleration assembly 13. The gear ring 131 in the deceleration assembly 13 is fixed in the drive housing 11 as a stationary component, and the main body of the planetary reduction component 132 performs planetary motion under the constraint of the gear ring 131, thereby achieving deceleration and torque amplification, and finally outputting rotational torque.

[0042] In one embodiment, the drive housing 11 includes an upper drive housing 111 and a lower drive housing 112, which are detachably connected by a snap-fit ​​structure.

[0043] In this embodiment, the upper drive housing 111 and the lower drive housing 112 constitute the upper and lower parts of the drive housing 11, respectively. Several hook structures 114 are provided on the edge of the upper drive housing 111; each hook structure 114 is an elastic cantilever hook. Correspondingly, a locking structure 115 is provided on the lower drive housing 112 to engage with the hook structures 114; the locking structure 115 can be a groove or a flange. During assembly, simply align the two housings and apply pressure; the hooks will elastically deform and extend beyond the edge of the groove, then spring back and securely lock into the groove, achieving rapid fixation of the two housings. This connection method eliminates the need for additional fasteners such as screws, and disassembly only requires tools or manual removal of the hooks from the groove, ensuring convenient disassembly and reducing the weight of the drive housing 11.

[0044] Understandably, by using a snap-fit ​​structure to connect the upper drive housing 111 and the lower drive housing 112, the assembly process of the drive housing 11 is simplified, eliminating the need for additional fasteners such as screws. This improves the assembly efficiency of the production line and reduces the weight of the electric curtain drive mechanism to some extent. At the same time, the detachable connection between the upper drive housing 111 and the lower drive housing 112 also facilitates future product repairs and replacement of core components, reducing maintenance difficulty and costs.

[0045] In one embodiment, a toothed sleeve positioning groove 116 is provided at the engagement point of the upper drive housing 111 and the lower drive housing 112, and a toothed sleeve positioning protrusion 1311 is provided on the outer periphery of the toothed ring 131, which is engaged in the toothed sleeve positioning groove 116.

[0046] In this embodiment, the gear sleeve positioning groove 116 is a recess formed by the upper drive housing 111 and the lower drive housing 112 after mold closing. A portion of the groove is formed on the side of the upper drive housing 111 facing the lower drive housing 112, and the other portion is formed on the side of the lower drive housing 112 facing the upper drive housing 111. A gear sleeve positioning protrusion 1311, matching the shape of the groove, is integrally formed on the outer periphery of the gear ring 131. When the upper drive housing 111 and the lower drive housing 112 are engaged, the gear sleeve positioning protrusion 1311 is precisely embedded and clamped in the gear sleeve positioning groove 116, thereby defining the gear ring 131 in both the radial and circumferential directions.

[0047] Understandably, by providing a gear sleeve positioning groove 116 at the engagement point of the upper drive housing 111 and the lower drive housing 112, and cooperating with the gear sleeve positioning protrusion 1311 on the gear ring 131, rapid and accurate positioning of the gear ring 131 can be achieved during assembly, ensuring that it maintains the correct meshing relationship with the planetary reduction component 132. Moreover, by using the clamping force after the upper drive housing 111 and the lower drive housing 112 are closed to fix the gear ring 131, rotation or axial movement of the gear ring 131 is effectively prevented when subjected to reaction torque, ensuring the stability of the reduction assembly 13 transmission and the reliability of long-term operation.

[0048] In one embodiment, the drive upper housing 111 includes an upper housing body 1111 and a bearing receiving portion 1112. The bearing receiving portion 1112 is connected to the upper housing body 1111 and protrudes toward the drive lower housing 112. A first bearing 123 is disposed in the cavity of the bearing receiving portion 1112 and is located on the side of the drive upper housing 111 away from the drive lower housing 112. The drive lower housing 112 includes a lower housing body 1121. A drive through hole 1122 is provided through the lower housing body 1121. The drive through hole 1122 and the bearing receiving portion 1112 are coaxially arranged along the stacking direction of the drive assembly 12 and the reduction assembly 13. The reduction torque output end of the planetary reduction component 132 is exposed through the drive through hole 1122. The upper housing body 1111 and the lower housing body 1121 are detachably connected.

[0049] In this embodiment, the bearing receiving portion 1112 is a partially protruding cup-shaped structure on the upper drive housing 111 for mounting the first bearing 123. The central axis of the bearing receiving portion 1112 coincides with the central axis of the drive mechanism. The bearing receiving portion 1112 is recessed on the side facing the lower drive housing 112, while the side of the bearing receiving portion 1112 away from the lower drive housing 112 is an open structure, and the first bearing 123 is mounted inside the bearing receiving portion 1112. The lower drive housing 112 is relatively flat, and a drive through hole 1122 is opened at its center. The size of the through hole matches the output end of the planetary reduction component 132, allowing the decelerated power to pass through the hole. Specifically, the deceleration torque output end of the planetary reduction component 132 can be the spline groove of the planetary gear carrier 1323.

[0050] Understandably, the bearing housing 1112 provides a stable and precise mounting position for the first bearing 123, ensuring the smooth rotation and coaxiality of the mover disc 121. The coaxial arrangement of the bearing housing 1112, the mover disc 121, the planetary reduction gear 132, and the drive through hole 1122 along the stacking direction ensures that the force flow path from power input to torque output is coaxially continuous, reducing transmission errors, vibrations, and noise that may be caused by eccentricity or misalignment. While maintaining a low thickness of the electric curtain drive mechanism, it improves the operating accuracy and service life of the entire electric curtain drive mechanism.

[0051] Further integration Figures 5 to 6 As shown, in one embodiment, the drive assembly 12 further includes a first drive locking component 124 and a second drive locking component 125. The first drive locking component 124 locks the inner ring of the moving disc 121 and the first bearing 123, and the second drive locking component 125 locks the bearing receiving portion 1112 and the outer ring of the first bearing 123; the inner ring of the first bearing 123 is rotatably connected to the outer ring of the first bearing 123.

[0052] In this embodiment, the first drive locking component 124 includes a first locking cover 1241 and a first locking bolt 1242. The inner ring of the first bearing 123 is supported on the stepped structure of the moving disc 121. The first locking cover 1241 is located on the side of the inner ring of the first bearing 123 away from the moving disc 121. The first locking bolt 1242 passes through the first locking cover 1241 and is locked to the moving disc 121 by threads, so that the moving disc 121 is connected to the inner ring of the first bearing 123 and can rotate synchronously.

[0053] In this embodiment, the second drive locking component 125 includes a second locking cover 1251 and a plurality of second locking bolts 1252. The second locking cover 1251 is generally annular to avoid the first locking cover 1241. The projection of the second locking cover 1251 along the installation direction overlaps with the outer ring of the first bearing 123. The plurality of second locking bolts 1252 are arranged around the first locking bolts 1242. The outer ring of the first bearing 123 is supported on the stepped structure of the bearing receiving portion 1112. The second locking cover 1251 is located on the other side of the outer ring of the first bearing 123 away from the stepped structure of the bearing receiving portion 1112. The plurality of second locking bolts 1252 pass through the second locking cover 1251 and are locked with the upper shell body 1111 by threads, so that the outer ring of the first bearing 123 is fixedly connected to the upper shell body 1111.

[0054] In this embodiment, a plurality of rollers are provided between the inner ring and the outer ring of the first bearing 123 for rotating connection between the inner ring and the outer ring of the first bearing 123.

[0055] Understandably, by setting the first drive locking component 124 and the second drive locking component 125, the inner and outer rings of the first bearing 123 are reliably fixed, respectively. This ensures that the rotational movement of the moving disk 121 can be achieved through relative rotation between the inner and outer rings of the first bearing 123, preventing undesirable relative sliding or free rotation between the moving disk 121 and the inner ring of the first bearing 123, or between the outer ring of the first bearing 123 and the drive upper housing 111 (bearing housing 1112). Simultaneously, the first bearing 123 is located in the cavity of the bearing housing 1112 and on the side of the drive upper housing 111 away from the drive lower housing 112. This allows the drive upper housing 111 to support the first bearing 123, avoiding the introduction of other support structures that would increase the structural size. Furthermore, the mounting point of the first bearing 123 is located on the outside of the drive housing 11, facilitating the installation of the first drive locking component 124 and the second drive locking component 125, ensuring a small overall thickness while maintaining assembly efficiency.

[0056] In this embodiment, the drive housing 11 further includes a drive cover plate 113, which covers the side of the upper drive housing 111 away from the lower drive housing 112 and is used to shield the interior of the drive housing 11.

[0057] In one embodiment, the drive assembly 12 further includes a stator component 122, which is disposed between the drive upper housing 111 and the mover disk 121, and located on the side of the mover disk 121 away from the reduction assembly 13. The mover disk 121 has a spline groove 1211 on the side facing the reduction assembly 13. The spline groove 1211, the drive through hole 1122, and the bearing receiving portion 1112 are coaxially arranged along the stacking direction of the drive assembly 12 and the reduction assembly 13. The planetary reduction assembly 132 includes a sun gear 1321, a portion of which is disposed in the spline groove 1211 and drivenly connected to the mover disk 121 via the spline groove 1211.

[0058] In this embodiment, the stator component 122 is fixedly mounted inside the drive housing 111. The mover disk 121, as a rotor containing a permanent magnet 1210, is coaxially arranged with the stator component 122 and supported by the first bearing 123. After energization, the rotating magnetic field generated by the stator component 122 drives the mover disk 121 to rotate. The center of the side of the mover disk 121 facing the reduction assembly 13 has an integrally formed or machined internal spline groove 1211. The sun gear 1321 in the planetary reduction assembly 132 has a matching external spline at the upper end of its shaft. During assembly, the shaft end of the sun gear 1321 is directly inserted into the spline groove 1211 of the mover disk 121, realizing a direct and gapless drive connection between the motor rotor and the input end of the reducer.

[0059] In this embodiment, the mover disk 121 is generally semi-enclosed in shape and cooperates with the drive housing 111 to form a space that can accommodate the stator component 122. The mover disk 121 can be made of metal, such as aluminum alloy, to ensure that the mover disk 121 is not easily deformed when rotating. Multiple permanent magnets 1210 are provided on the inner side of the annular sidewall of the mover disk 121, and the multiple permanent magnets 1210 are arranged around the periphery of the stator component 122.

[0060] Understandably, the stator component 122 and the mover disk 121 (as the motor rotor) enable the conversion of electrical energy into mechanical energy. Simultaneously, by directly creating a spline groove 1211 on the mover disk 121 and engaging it with the sun gear 1321 (which serves as the input end of the planetary reduction gear 132), a drive connection between the motor rotor and the input end of the reduction gear assembly 13 is achieved. Eliminating intermediate transmission components such as couplings further shortens the axial dimension, improves transmission rigidity and response speed, resulting in a more compact structure, shorter transmission chain, and higher efficiency for the electric curtain drive mechanism.

[0061] Further integration Figures 7 to 9 As shown, in one embodiment, the planetary reduction gear 132 includes a sun gear 1321, a plurality of planet gears 1322, a planetary gear carrier 1323, and a planetary fixed carrier 1324. The sun gear 1321 is drivenly connected to the mover disk 121. The plurality of planet gears 1322 are arranged around the sun gear 1321 and mesh with the sun gear 1321 and the ring gear 131, respectively. The plurality of planet gears 1322 are rotatably disposed between the planetary gear carrier 1323 and the planetary fixed carrier 1324 to drive the planetary gear carrier 1323 to rotate.

[0062] In this embodiment, the sun gear 1321 includes a first transmission portion 13211 and a second transmission portion 13212 integrally formed along the axial direction. The outer diameter of the first transmission portion 13211 is larger than the outer diameter of the second transmission portion 13212. The first transmission portion 13211 is disposed in the spline groove 1211 and is connected to the moving disk 121 for transmission. The second transmission portion 13212 is located on the side of the first transmission portion 13211 away from the drive assembly 12 and rotates coaxially with the first transmission portion 13211. The planetary reduction component 132 also includes a drive positioning shaft 1325. One end of the drive positioning shaft 1325 extends into the moving disk 121, and the other end of the drive positioning shaft 1325 extends into the planetary gear carrier 1323 along the axial direction. The sun gear 1321 is sleeved on the outside of the drive positioning shaft 1325 to achieve rotational positioning.

[0063] In this embodiment, multiple planetary gears 1322 are arranged around the sun gear 1321 and respectively mesh with the second transmission part 13212. The planetary reduction component 132 also includes a reduction positioning shaft 1326, one end of which extends into the planetary transmission carrier 1323, and the other end of which extends into the planetary fixed carrier 1324. The number of reduction positioning shafts 1326 is the same as the number of planetary gears 1322, and a planetary gear 1322 is fitted on the outer side of each reduction positioning shaft 1326. The planetary reduction component 132 also includes multiple reduction locking bolts 1327, which pass through the planetary fixed carrier 1324 and are locked to the planetary transmission carrier 1323 by threads. The planetary fixed carrier 1324 abuts against the planetary transmission carrier 1323 and accommodates the multiple planetary gears 1322. The planetary fixed carrier 1324 is located on the side of the planetary transmission carrier 1323 facing the drive assembly 12, and the gear ring 131 is fitted on the outer side of the planetary reduction component 132.

[0064] In this embodiment, the power transmission process is as follows: high-speed, low-torque rotational power is input to the central sun gear 1321 via the moving disk 121. The rotation of the sun gear 1321 simultaneously drives multiple planetary gears 1322 evenly distributed around it. Since the outer gear ring 131 is fixed, these planetary gears 1322, while rotating around their own axes, also revolve around the sun gear 1321 along a fixed orbit (i.e., the internal teeth of the gear ring 131), like planets. The planetary transmission carrier 1323 is provided with multiple reduction positioning shafts 1326 for mounting the planetary gears 1322. The planetary transmission carrier 1323 and the planetary fixed carrier 1324 together form a cage-like structure, constraining the planetary gears 1322 within it. The revolving motion of the planetary gears 1322 drives the entire planetary transmission carrier 1323 (and the planetary fixed carrier 1324) to rotate at a relatively low speed and with a relatively large torque. This rotating planetary transmission carrier 1323 is the output end of the reduction mechanism.

[0065] Understandably, power is transmitted from the mover disk 121 to the sun gear 1321. The sun gear 1321 drives multiple planetary gears 1322 to perform planetary motion within a fixed gear ring 131. The revolution of the planetary gears 1322 drives the planetary transmission carrier 1323 to rotate, thereby achieving speed reduction and torque increase, which is then output as torque. The multiple planetary gears 1322 are rotatably positioned between the planetary transmission carrier 1323 and the planetary fixed carrier 1324, which not only fixes the position of the planetary gears 1322 but also integrates the planetary gears 1322 and the planetary transmission carrier 1323 into a single unit that can rotate together. The design of multiple planetary gears 1322 sharing the load allows the reduction assembly 13 to have a higher load-bearing capacity and impact resistance than a single pair of gears in the same volume. Furthermore, the symmetrical structural layout helps to balance radial forces, making the transmission smoother and improving the quietness of the electric curtain drive mechanism.

[0066] In one embodiment, the reduction assembly 13 further includes a second bearing 133, which is disposed around the planetary gear carrier 1323 and located between the planetary gear carrier 1323 and the gear ring 131. The inner ring of the second bearing 133 is connected to the planetary gear carrier 1323, and the outer ring of the second bearing 133 is connected to the gear ring 131; the inner ring and the outer ring of the second bearing 133 are rotatably connected.

[0067] In this embodiment, a second bearing 133 is provided to support the planetary gear carrier 1323, which serves as the output end, and to enable it to smoothly withstand the load rotation. The inner ring of the second bearing 133 is fixed to the outer circumferential surface of the planetary gear carrier 1323 by press fitting or other means, and the outer ring of the second bearing 133 is fixed to the inner circumferential surface of the opposing gear ring 131 by press fitting or other means. Since the gear ring 131 is fixed and the planetary gear carrier 1323 is rotating, this second bearing 133 provides rotational support for the rotating planetary gear carrier 1323 relative to the fixed housing (indirectly connected via the gear ring 131).

[0068] Understandably, by setting a second bearing 133 to support the planetary gear carrier 1323, which serves as the output component, a stable rotational support is provided for the torque output end. The planetary gear carrier 1323 bears radial and axial loads while transmitting large torques. The introduction of the second bearing 133 precisely constrains its motion trajectory, effectively absorbing and dispersing these loads, preventing the planetary gear carrier 1323 from tilting or radially wobbling under load, ensuring the smoothness and accuracy of the output shaft rotation, reducing frictional losses, and extending the service life of the reduction assembly 13. Furthermore, the electric curtain drive mechanism provided in this application, with a first bearing 123 corresponding to the drive assembly 12 and a second bearing 133 corresponding to the reduction assembly 13, ensures both the accuracy and reliability of the rotational transmission process, while avoiding over-positioning, increased production costs, and excessive overall weight caused by introducing too many bearings. This ensures that the electric curtain drive mechanism meets functional requirements while reducing production and logistics costs.

[0069] In one embodiment, a first stepped structure 13231 is provided at the lower end of the outer side of the planetary gear carrier 1323, and a second stepped structure 1312 is provided at the upper end of the inner side of the gear ring 131. A second bearing 133 is sandwiched between the first stepped structure 13231 and the second stepped structure 1312. The inner ring of the second bearing 133 abuts against the first stepped structure 13231, and the outer ring of the second bearing 133 abuts against the second stepped structure 1312.

[0070] In this embodiment, an annular step, namely the first step structure 13231, is machined on the outer circumferential surface of the planetary carrier 1323 near its output end. A third step structure 13241, corresponding to the first step structure 13231, is also provided on the lower side of the periphery of the planetary carrier 1324. This third step structure 13241 cooperates with the first step structure 13231 and clamps the inner ring of the second bearing 133 through the locking process of the planetary carrier 1324 and the planetary carrier 1323. This fully utilizes the radial space of the reduction assembly 13, thereby reducing the axial height of the reduction assembly 13. Furthermore, by simultaneously locking the second bearing 133 using the planetary carrier 1324 and the planetary carrier 1323, which would otherwise need to be locked, other support structures are avoided, further reducing the axial height of the reduction assembly 13.

[0071] In this embodiment, an annular step, namely the second step structure 1312, is also machined on the inner circumferential surface of the gear ring 131 near its upper end face. During assembly, the planetary reduction component 132 with the second bearing 133 is pushed in along the axial direction until it abuts against the drive assembly 12. At the same time, one end face of the outer ring of the second bearing 133 abuts against the second step structure 1312 along the axial direction. When the lower drive housing 112 and the upper drive housing 111 are fastened together, the gear ring 131, the planetary reduction component 132, and the second bearing 133 are fixed simultaneously.

[0072] In this embodiment, a plurality of rollers are provided between the inner ring of the second bearing 133 and the outer ring of the second bearing 133 for rotating connection between the inner ring of the second bearing 133 and the outer ring of the second bearing 133.

[0073] Understandably, by setting a first step structure 13231 and a second step structure 1312 that cooperate with each other on the planetary gear carrier 1323 and the gear ring 131, a bidirectional axial positioning is provided for the second bearing 133. During assembly, the second bearing 133 can be easily confined to a predetermined position, effectively preventing axial movement during operation and ensuring that the planetary gear carrier 1323 is always in the correct axial working position. Furthermore, the structure is simple and reliable, easy to process and assemble, and ensures the stability and reliability of the output end at low cost. On the other hand, based on the axially stacked configuration of the reduction assembly 13, the second bearing 133 is clamped between the gear ring 131 and the planetary gear carrier 1323, achieving positioning of the second bearing 133 without introducing any additional fixing structures. This maintains a low thickness for the electric curtain drive mechanism while improving the overall operating accuracy and service life of the electric curtain drive mechanism.

[0074] Further integration Figures 3 to 4As shown, in one embodiment, the electric curtain drive mechanism further includes a drive control component 14, which is disposed in the deceleration receiving cavity 110 and is electrically connected to the drive component 12 at least.

[0075] In this embodiment, a portion of the drive control component 14 is disposed on the side of the drive component 12 and the deceleration component 13, and the length direction of this portion is parallel to the stacking direction of the drive component 12 and the deceleration component 13. Another portion of the drive control component 14 is disposed on the side of the deceleration component 13 away from the drive component 12 and is housed in the cavity of the deceleration receiving cavity 110.

[0076] In this embodiment, the drive control assembly 14 is typically a printed circuit board (PCBA) integrating electronic components such as a microprocessor, a motor drive chip, and a wireless communication module. To avoid increasing the radial dimension of the mechanism, a portion of the drive control assembly 14 is vertically arranged within the reduction gear housing 110, with its length direction approximately parallel to the axial stacking direction of the motor and reducer, effectively utilizing the lateral space within the circular cavity. Another portion of the drive control assembly 14 is located on the side of the reduction gear assembly 13 away from the drive assembly 12, effectively utilizing the space between the lower drive housing 112 and the reduction gear assembly 13.

[0077] In this embodiment, the drive control component 14 is electrically connected to the stator component 122 at least through wires to control the start, stop, direction and speed of the motor. The connection method and control logic are not described in detail, but those skilled in the art will understand that this is certainly achievable.

[0078] Understandably, integrating the drive control component 14 into the reduction gear housing 110 achieves a high degree of mechatronics integration of the motor, reducer, and control system, fully utilizing the spare space inside the drive housing 11 without increasing the radial dimension of the mechanism. This makes the electric curtain drive mechanism a fully functional, plug-and-play modular unit, simplifying the assembly process of the downstream electric curtain drive device 16 and further improving the overall compactness and integration of the electric curtain drive mechanism, facilitating later sales, transportation, maintenance, and product iteration.

[0079] Further integration Figure 10 As shown, in one embodiment, an electric curtain drive device 16 includes a curtain retraction end cover box 17 and the electric curtain drive mechanism described above, wherein the electric curtain drive mechanism is detachably disposed within the curtain retraction end cover box 17.

[0080] Understandably, applying the aforementioned electric curtain drive mechanism, which boasts advantages in miniaturization, lightweight design, and high integration, to the electric curtain drive device 16 significantly reduces the size and weight of the entire drive device (i.e., the curtain retraction end cover box 17), resulting in a more refined and compact appearance that better integrates into modern home environments. Simultaneously, the detachable design between the drive mechanism and the end cover box standardizes and universalizes the core power module, facilitating subsequent sales, transportation, maintenance, and product iteration.

[0081] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. An electric curtain drive mechanism, characterized in that, include: The drive housing (11) has a deceleration cavity (110) inside. A drive assembly (12) is disposed in the deceleration cavity (110). The drive assembly (12) includes a first bearing (123) and a moving disk (121). The moving disk (121) is movably connected to the drive housing (11) via the first bearing (123). The deceleration assembly (13) is disposed in the deceleration receiving cavity (110). The deceleration assembly (13) includes a gear ring (131) and a planetary deceleration component (132). The gear ring (131) is fixedly connected to the drive housing (11). The planetary deceleration component (132) meshes with the gear ring (131). The planetary deceleration component (132) is drivenly connected to the moving disk (121) for outputting rotational torque.

2. The electric curtain drive mechanism according to claim 1, characterized in that: The drive housing (11) includes an upper drive housing (111) and a lower drive housing (112), which are detachably connected by a snap-fit ​​structure.

3. The electric curtain drive mechanism according to claim 2, characterized in that: A toothed sleeve positioning groove (116) is provided at the engagement point of the upper drive housing (111) and the lower drive housing (112). A toothed sleeve positioning protrusion (1311) is provided on the outer periphery of the toothed ring (131), and the toothed sleeve positioning protrusion (1311) is engaged in the toothed sleeve positioning groove (116).

4. The electric curtain drive mechanism according to claim 2, characterized in that: The upper drive housing (111) includes an upper housing body (1111) and a bearing receiving portion (1112). The bearing receiving portion (1112) is connected to the upper housing body (1111) and protrudes toward the lower drive housing (112). The first bearing (123) is disposed in the cavity of the bearing receiving portion (1112) and is located on the side of the upper drive housing (111) away from the lower drive housing (112). The lower drive housing (112) includes a lower housing body (112). 1) A drive through hole (1122) is provided on the lower shell body (1121). The drive through hole (1122) and the bearing receiving part (1112) are coaxially arranged along the stacking direction of the drive assembly (12) and the deceleration assembly (13). The deceleration torque output end of the planetary deceleration component (132) is exposed through the drive through hole (1122). The upper shell body (1111) and the lower shell body (1121) are detachably connected.

5. The electric curtain drive mechanism according to claim 4, characterized in that: The drive assembly (12) further includes a first drive locking component (124) and a second drive locking component (125). The first drive locking component (124) locks the inner ring of the moving disc (121) and the first bearing (123), and the second drive locking component (125) locks the bearing receiving portion (1112) and the outer ring of the first bearing (123). The inner ring of the first bearing (123) is rotatably connected to the outer ring of the first bearing (123).

6. The electric curtain drive mechanism according to claim 5, characterized in that: The drive assembly (12) further includes a stator component (122), which is located between the drive upper housing (111) and the moving disk (121), and is located on the side of the moving disk (121) away from the reduction assembly (13). The moving disk (121) has a spline groove (1211) on the side facing the reduction assembly (13). The spline groove (1211), the drive through hole (1122), and the bearing receiving part (1112) are coaxially arranged along the stacking direction of the drive assembly (12) and the reduction assembly (13). The planetary reduction assembly (132) includes a sun gear (1321), a portion of which is located in the spline groove (1211) and is drivenly connected to the moving disk (121) via the spline groove (1211).

7. The electric curtain drive mechanism according to claim 1, characterized in that: The planetary reduction gear (132) includes a sun gear (1321), multiple planet gears (1322), a planetary gear carrier (1323), and a planetary gear carrier (1324). The sun gear (1321) is driven to connect with the moving disk (121). The multiple planet gears (1322) are arranged around the sun gear (1321). The multiple planet gears (1322) mesh with the sun gear (1321) and the gear ring (131) respectively. The multiple planet gears (1322) are rotatably disposed between the planetary gear carrier (1323) and the planetary gear carrier (1324) to drive the planetary gear carrier (1323) to rotate.

8. The electric curtain drive mechanism according to claim 7, characterized in that: The reduction assembly (13) further includes a second bearing (133), which is arranged around the planetary gear carrier (1323) and located between the planetary gear carrier (1323) and the gear ring (131); the inner ring of the second bearing (133) is connected to the planetary gear carrier (1323), and the outer ring of the second bearing (133) is connected to the gear ring (131); the inner ring of the second bearing (133) is rotatably connected to the outer ring of the second bearing (133).

9. The electric curtain drive mechanism according to claim 8, characterized in that: The lower end of the outer side of the planetary gear carrier (1323) is provided with a first step structure (13231), and the upper end of the inner side of the gear ring (131) is provided with a second step structure (1312). The second bearing (133) is sandwiched between the first step structure (13231) and the second step structure (1312). The inner ring of the second bearing (133) abuts against the first step structure (13231), and the outer ring of the second bearing (133) abuts against the second step structure (1312).

10. An electric curtain drive device (16), characterized in that, It includes a curtain retraction end cover box (17) and an electric curtain drive mechanism as described in any one of claims 1 to 9, wherein the electric curtain drive mechanism is detachably disposed within the curtain retraction end cover box (17).

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