Opening and closing curtain motor assembly of outer rotor motor structure

Abstract

The utility model relates to an opening and closing curtain motor assembly of an outer rotor motor structure. The technical problem that an existing outer rotor motor is too small in torque is solved. Comprising a transmission box body, an output head penetrating out of the outer side of the transmission box body is rotationally arranged in the transmission box body, a driving motor is arranged in the transmission box body and is an outer rotor motor, and a circuit board mounting frame connected with the driving motor is arranged on the outer side of one end of the driving motor; a circuit board body connected with the driving motor is arranged on the side, away from the driving motor, of the circuit board mounting frame, and a motor shaft of the driving motor sequentially penetrates through the circuit board mounting frame and the circuit board body and then is connected with the output head through a transmission gear structure. The driving motor has the advantages that the motor shaft is in transmission connection with the output head through the transmission gear structure, output torque can be improved, and the driving motor can be suitable for heavy curtains. And the circuit board body is arranged on the outer side of the driving motor through the bracket mounting plate, so that the circuit board body can be conveniently mounted and maintained.

Description

Technical Field

[0001] This utility model belongs to the technical field of curtain motor equipment, specifically relating to an opening and closing curtain motor assembly with an external rotor motor structure. Background Technology

[0002] In the smart home field, curtain motors are widely used in electric curtain systems. Currently, most existing curtain motors use internal rotor motors, which have the advantages of high speed and high precision, enabling precise opening and closing control of curtains. However, the torque output of internal rotor motors is relatively small and cannot be adapted to large or heavy curtains. Therefore, external rotor motors have begun to be used for driving curtains. External rotor motors have the advantages of compact structure and high torque, making them suitable for heavier curtains. However, in order to ensure low noise and compactness, most existing external rotor motors use a direct drive mode, which means that the motor output torque is not amplified at all. This results in the external rotor motor not being able to provide enough torque to drive heavy curtains, affecting the user experience. Summary of the Invention

[0003] The purpose of this invention is to address the above-mentioned problems by providing an opening and closing curtain motor assembly with an external rotor motor structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A curtain opening and closing motor assembly with an external rotor motor structure includes a transmission housing. An output head, which rotatably extends outward from the outside of the transmission housing, is located within the transmission housing. The drive motor is an external rotor motor. A circuit board mounting bracket connected to the drive motor is located on the outer side of one end of the drive motor. A circuit board body connected to the drive motor is located on the side of the circuit board mounting bracket away from the drive motor. The motor shaft of the drive motor passes sequentially through the circuit board mounting bracket and the circuit board body, and is connected to the output head via a transmission gear structure. The circuit board mounting bracket facilitates the control connection between the circuit board body and the drive motor, and allows the circuit board body to be positioned outside the drive motor, facilitating installation and maintenance. The connection between the motor shaft and the output head via the transmission gear structure is a gear transmission mode, which can improve the torque of the drive motor and meet the torque requirements of heavy curtains.

[0005] In the above-mentioned curtain opening and closing motor assembly with an external rotor motor structure, the transmission housing has an installation notch on one side, and one end of the output head extends out of the transmission housing and into the installation notch. The installation notch facilitates connection with the curtain track and allows the output head to drive the curtain.

[0006] In the above-mentioned curtain opening and closing motor assembly with an external rotor motor structure, the transmission gear structure is a planetary gear structure, and one end of the motor shaft of the drive motor has a motor output section connected to the transmission gear structure. The motor output section facilitates positioning and connection with the transmission gear structure, improves connection efficiency, and ensures transmission effect.

[0007] In the above-mentioned curtain opening and closing motor assembly with an external rotor motor structure, the transmission gear structure includes a gear housing disposed within a transmission housing. A planetary gear set is disposed within the gear housing. The motor output part of the motor shaft passes through the gear housing and is connected to one end of the planetary gear set. The other end of the planetary gear set is connected to a conical transmission gear disposed outside the gear housing. The output head is vertically rotatably disposed within the transmission housing, and a conical output gear that meshes with the conical transmission gear is coaxially fixedly connected to the output head. The planetary gear set and the output head can be connected for transmission through the conical transmission gear and the conical output gear.

[0008] In the aforementioned curtain opening and closing motor assembly with an external rotor motor structure, the drive motor includes an inner stator and an outer rotor rotatably sleeved on the outer side of the inner stator. One end of the outer rotor is closed and the other end is open. A motor shaft is rotatably inserted through the center of the inner stator. One end of the motor shaft is connected to the closed end of the outer rotor, and the other end of the motor shaft extends through the open end of the outer rotor to form the motor output section. The circuit board mounting bracket is fixedly installed on the outside of the open end of the outer rotor and fixedly connected to the inner stator through a bracket fixing structure. The circuit board body is installed between the side of the circuit board mounting bracket away from the outer rotor and the gear housing through a circuit board mounting structure. The motor output section of the motor shaft passes through the circuit board mounting bracket and the circuit board body in sequence and extends to the side of the circuit board mounting bracket away from the outer rotor. The bracket fixing structure facilitates the fixed connection between the circuit board mounting bracket and the inner stator, ensuring connection stability. The circuit board mounting structure also ensures the connection stability between the circuit board body and the circuit board mounting bracket.

[0009] In the above-mentioned curtain opening and closing motor assembly with an external rotor motor structure, the external rotor is cylindrical and the inner stator, the external rotor, and the motor shaft are coaxially arranged. One end of the inner stator does not extend beyond the open end of the external rotor, and one end of the motor shaft is connected to the center of the closed end of the external rotor. This ensures the overall structural compactness of the external rotor motor and guarantees transmission efficiency.

[0010] In the aforementioned curtain motor assembly with an external rotor motor structure, the circuit board mounting bracket includes a support cylinder. The motor shaft is rotatably connected to bearings on the inner circumferential sides of both ends of the support cylinder. One end of the support cylinder is fixedly connected to the inner stator via the aforementioned support fixing structure. The other end of the support cylinder extends to the outer side of the open end of the external rotor, and the outer circumferential side of the support cylinder has several support mounting plates extending radially outward along the support cylinder. The support cylinder can connect and support the inner stator, and the bearings allow the motor shaft to be rotatably mounted within the support cylinder, ensuring rotational efficiency. The support mounting plates facilitate fixed connection with the circuit board, ensuring the installation stability of the circuit board.

[0011] In the aforementioned external rotor motor structure for opening and closing curtain motor assemblies, the bracket fixing structure includes a stator mounting hole located at the center of the inner stator. One end of the bracket cylinder is inserted into the stator mounting hole. The outer circumferential side of the bracket cylinder has at least one protruding rib extending axially along the bracket cylinder and abutting against the inner wall of the stator mounting hole. An installation limiting component is provided between the bracket cylinder and the inner stator. The installation limiting component includes several limiting protrusions located on the outer circumferential side of the bracket cylinder. One end of each limiting protrusion extends to one side of the bracket mounting plate, and the other end abuts against one end face of the inner stator. The stator mounting hole facilitates the quick insertion and installation of the bracket cylinder into the stator mounting hole, ensuring the connection efficiency with the inner stator. The protruding rib improves the connection stability between the bracket cylinder and the inner stator, and the limiting protrusions limit the inner stator, ensuring the installation stability of the inner stator.

[0012] In the aforementioned opening and closing curtain motor assembly with an external rotor motor structure, the circuit board mounting structure includes a circuit board hole located at the center of the circuit board body. One end of the bracket cylinder is inserted into the circuit board hole. The bracket mounting plate has mounting portions on the side away from the external rotor that abut against one side of the circuit board body. Each mounting portion has a circuit board mounting hole penetrating the bracket mounting plate. The circuit board body has circuit board positioning holes corresponding to the circuit board mounting holes. One end of the gear housing has a housing positioning hole corresponding to the circuit board positioning holes. The circuit board positioning holes, housing positioning holes, and circuit board mounting holes are connected by circuit board mounting bolts. The circuit board body allows for quick mounting onto the bracket cylinder. The mounting portions facilitate positioning of the circuit board mounting holes and the circuit board positioning holes. The circuit board mounting holes, circuit board positioning holes, and housing positioning holes ensure the connection stability between the gear housing and the bracket mounting plate. The circuit board body is positioned between the gear housing and the bracket mounting plate.

[0013] In the above-mentioned curtain opening and closing motor assembly with an external rotor motor structure, the circuit board has a Hall sensor module corresponding to the external rotor, and the gear housing has circuit board limiting parts on both sides of one end, and the circuit board has limiting notches on both sides corresponding to the circuit board limiting parts. The circuit board can be limited by the circuit board limiting parts and the limiting notches, thereby improving the installation stability of the circuit board.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] 1. The motor shaft is connected to the output head via a transmission gear structure, which can increase the output torque and ensure that the drive motor can be used for heavier curtains.

[0016] 2. The circuit board is mounted on the outside of the drive motor via a bracket mounting plate, which facilitates the installation and maintenance of the circuit board.

[0017] 3. The connection stability between the inner stator and the support cylinder can be ensured by the bracket fixing structure and the installation limiting components. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a structural cross-sectional view of the present invention.

[0020] Figure 3 This is a schematic diagram of the transmission gear structure in this utility model.

[0021] Figure 4 This is an exploded view of the circuit board mounting structure in this utility model.

[0022] Figure 5 This is a schematic diagram of the circuit board mounting bracket in this utility model.

[0023] In the diagram: 1. Transmission housing; 11. Output head; 12. Mounting notch; 2. Drive motor; 21. Motor shaft; 22. Motor output section; 23. Inner stator; 24. Outer rotor; 241. Closed end; 242. Open end; 3. Circuit board mounting bracket; 31. Circuit board body; 311. Limiting notch; 32. Support cylinder; 33. Bearing; 34. Support mounting plate; 4. Transmission gear structure; 4. Gear housing; 41. Circuit board limiting section; 411. Planetary gear set; 42. Bevel transmission gear; 43. Bevel output gear; 44. Support fixing structure; 5. Stator mounting hole; 51. Rib; 52. Circuit board mounting structure; 6. Circuit board hole; 61. Mounting section; 62. Circuit board mounting hole; 63. Circuit board positioning hole; 64. Housing positioning hole; 65. Mounting limiting component; 7. Limiting protrusion; 71. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1 , Figure 2 As shown, this curtain opening and closing motor assembly with an external rotor motor structure includes a transmission housing 1. An output head 11, which rotatably extends outwards from the outside of the transmission housing 1, is rotatably disposed within the transmission housing 1. A drive motor 2, an external rotor motor, is disposed within the transmission housing 1. The external rotor motor increases torque, making it suitable for heavier curtains. A circuit board mounting bracket 3, connected to the drive motor 2, is disposed on one side of the drive motor 2. A circuit board body 31, connected to the drive motor 2, is disposed on the side of the circuit board mounting bracket 3 away from the drive motor 2. The motor shaft 21 of the drive motor 2 passes sequentially through the circuit board mounting bracket 3 and the circuit board body 31, and is connected to the output head 11 via a transmission gear structure 4. The circuit board mounting bracket 3 facilitates the control connection between the circuit board body 31 and the drive motor 2, and allows the circuit board body 31 to be positioned outside the drive motor 2, facilitating installation and maintenance. The connection between the motor shaft 21 and the output head 11 via the transmission gear structure 4 is a gear transmission mode, which increases the torque of the drive motor 2 and meets the torque requirements of heavy curtains.

[0026] Specifically, the transmission housing 1 has an installation notch 12 on one side, and one end of the output head 11 extends out of the transmission housing 1 and into the installation notch 12. The installation notch 12 facilitates connection with the curtain track and allows the output head 11 to drive the curtain.

[0027] Among them, the transmission gear structure 4 is a planetary gear structure, and one end of the motor shaft 21 of the drive motor 2 has a motor output part 22 connected to the transmission gear structure 4. The motor output part 22 can be easily positioned and connected to the transmission gear structure 4, improving the connection efficiency and ensuring the transmission effect.

[0028] like Figure 2 , Figure 3 , Figure 4 As shown, the transmission gear structure 4 includes a gear housing 41 disposed within the transmission housing 1. A planetary gear set 42 is disposed within the gear housing 41. The planetary gear set 42 has advantages such as compact structure, large transmission ratio, high transmission efficiency, high load capacity, and low noise. The motor output part 22 of the motor shaft 21 passes through the gear housing 41 and is connected to one end of the planetary gear set 42. The other end of the planetary gear set 42 is connected to a bevel transmission gear 43 disposed outside the gear housing 41. The output head 11 is vertically rotatably disposed within the transmission housing 1, and a bevel output gear 44 that meshes with the bevel transmission gear 43 is coaxially fixedly connected to the output head 11. The planetary gear set 42 and the output head 11 can be connected by transmission through the bevel transmission gear 43 and the bevel output gear 44.

[0029] Furthermore, the drive motor 2 includes an inner stator 23 and an outer rotor 24 rotatably sleeved around the inner stator 23. One end of the outer rotor 24 is closed and the other end is open. A motor shaft 21 is rotatably inserted through the center of the inner stator 23. One end of the motor shaft 21 is connected to the closed end 241 of the outer rotor 24, and the other end of the motor shaft 21 protrudes from the open end 242 of the outer rotor 24 to form the aforementioned motor output section 22. The circuit board mounting bracket 3 is disposed outside the open end 242 of the outer rotor 24 and is fixedly connected to the inner stator 23 via a bracket fixing structure 5. The circuit board body 31 is mounted between the side of the circuit board mounting frame 3 away from the outer rotor 24 and the gear housing 41 via the circuit board mounting structure 6. The motor output part 22 of the motor shaft 21 passes through the circuit board mounting frame 3 and the circuit board body 31 in sequence and extends to the side of the circuit board mounting frame 3 away from the outer rotor 24. The bracket fixing structure 5 facilitates the fixed connection between the circuit board mounting frame 3 and the inner stator 23, ensuring connection stability. The circuit board mounting structure 6 also ensures the connection stability between the circuit board body 31 and the circuit board mounting frame 3.

[0030] The outer rotor 24 is cylindrical and the inner stator 23, the outer rotor 24 and the motor shaft 21 are coaxially arranged. One end of the inner stator 23 does not extend beyond the open end 242 of the outer rotor 24, and one end of the motor shaft 21 is connected to the center of the closed end 241 of the outer rotor 24. This ensures the overall compactness of the outer rotor motor and guarantees transmission efficiency.

[0031] Combination Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the circuit board mounting bracket 3 includes a bracket cylinder 32. The motor shaft 21 is rotatably connected to the bearings 33 on the inner side of both ends of the bracket cylinder 32. One end of the bracket cylinder 32 is fixedly connected to the inner stator 23 through the bracket fixing structure 5. The other end of the bracket cylinder 32 extends to the outside of the open end 242 of the outer rotor 24. The bracket cylinder 32 has several bracket mounting plates 34 that extend radially outward along the outer side of the bracket cylinder 32. The inner stator 23 can be connected and supported through the bracket cylinder 32. The motor shaft 212 can be rotatably mounted inside the bracket cylinder 32 through the bearings 33 to ensure rotation efficiency. The bracket mounting plates 34 can be easily fixedly connected to the circuit board body 31 to ensure the installation stability of the circuit board body 31.

[0032] The bracket fixing structure 5 includes a stator mounting hole 51 located at the center of the inner stator 23. One end of the bracket cylinder 32 is inserted into the stator mounting hole 51. The bracket cylinder 32 has at least one rib 52 extending axially along the outer side of the circumference of the bracket cylinder 32 and abutting against the inner wall of the stator mounting hole 51. An installation limiting component 7 is provided between the bracket cylinder 32 and the inner stator 23. The installation limiting component 7 includes several limiting protrusions 71 located circumferentially on the outer side of the bracket cylinder 32. One end of each limiting protrusion 71 extends to one side of the bracket mounting plate 34, and the other end abuts against one end face of the inner stator 23. The stator mounting hole 51 facilitates the quick insertion and installation of the bracket cylinder 32 into the stator mounting hole 51, ensuring the connection efficiency with the inner stator 23. The rib 52 improves the connection stability between the bracket cylinder 32 and the inner stator 23, and the limiting protrusions 71 limit the inner stator 23, ensuring the installation stability of the inner stator 23.

[0033] Specifically, the circuit board mounting structure 6 includes a circuit board hole 61 located at the center of the circuit board body 31, one end of the bracket cylinder 32 inserted into the circuit board hole 61, and a mounting portion 62 on the side of the bracket mounting plate 34 away from the outer rotor 24 that abuts against one side of the circuit board body 31. Each mounting portion 62 has a circuit board mounting hole 63 penetrating the bracket mounting plate 34. The circuit board body 31 has circuit board positioning holes 64 corresponding to the circuit board mounting holes 63. One end of the gear housing 41 has a housing positioning hole 65 corresponding to the circuit board positioning holes 64. The circuit board positioning hole 64, the housing positioning hole 65, and the circuit board mounting hole 63 are connected by circuit board mounting bolts. The circuit board body 61 facilitates the quick mounting of the circuit board body 31 onto the bracket cylinder 32. The mounting part 62 facilitates the positioning of the circuit board mounting hole 63 and the circuit board positioning hole 64. The circuit board mounting hole 63, the circuit board positioning hole 64, and the housing positioning hole 65 ensure the connection stability between the gear housing 41 and the bracket mounting plate 34. The circuit board body 31 is positioned between the gear housing 41 and the bracket mounting plate 34.

[0034] Combination Figure 3 , Figure 4 As shown, the circuit board 31 has a Hall sensor module corresponding to the outer rotor 24, and the gear housing 41 has circuit board limiting parts 411 on both sides of one end, and the circuit board 31 has limiting notches 311 on both sides corresponding to the circuit board limiting parts 411. The circuit board limiting parts 411 and the limiting notches 311 can limit the circuit board 31 and improve the installation stability of the circuit board 31.

[0035] The principle of this embodiment is as follows: the circuit board 31 is fixedly mounted on the outside of the open end 242 of the drive motor 2 by the bracket mounting plate 34, which facilitates the installation and maintenance of the circuit board 31. The circuit board mounting structure 6 can ensure the installation stability of the circuit board 31. Furthermore, the connection between the motor shaft 21 and the transmission gear structure 4 can improve the torque of the drive motor 2 and ensure the driving effect of the drive motor 2.

[0036] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0037] Although this document frequently uses terms such as transmission housing 1, output head 11, mounting notch 12, drive motor 2, motor shaft 21, motor output part 22, inner stator 23, outer rotor 24, closed end 241, open end 242, circuit board mounting bracket 3, circuit board body 31, limiting notch 311, bracket cylinder 32, bearing 33, bracket mounting plate 34, transmission gear structure 4, gear housing 41, circuit board limiting part 411, planetary gear set 42, bevel transmission gear 43, bevel output gear 44, bracket fixing structure 5, stator mounting hole 51, rib 52, circuit board mounting structure 6, circuit board hole 61, mounting part 62, circuit board mounting hole 63, circuit board positioning hole 64, housing positioning hole 65, mounting limiting component 7, and limiting protrusion 71, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. An open-close curtain motor assembly of outer rotor motor structure, comprising a transmission box (1), an output head (11) penetrating out of the outer side of the transmission box (1) is arranged to rotate in the transmission box (1), a driving motor (2) is arranged in the transmission box (1), characterized in that, The drive motor (2) is an external rotor motor. A circuit board mounting bracket (3) connected to the drive motor (2) is provided on the outer side of one end of the drive motor (2). A circuit board body (31) connected to the drive motor (2) is provided on the side of the circuit board mounting bracket (3) away from the drive motor (2). The motor shaft (21) of the drive motor (2) passes through the circuit board mounting bracket (3) and the circuit board body (31) in sequence and is connected to the output head (11) through the transmission gear structure (4).

2. A motor assembly for an open / close shade according to claim 1, wherein The transmission housing (1) has an installation notch (12) on one side, and one end of the output head (11) extends out of the transmission housing (1) and into the installation notch (12).

3. A motor assembly for an open / close shade according to claim 1 or 2, wherein The transmission gear structure (4) is a planetary gear structure, and the motor shaft (21) of the drive motor (2) has a motor output section (22) connected to the transmission gear structure (4).

4. A motor assembly for an open / close shade according to claim 3, wherein The transmission gear structure (4) includes a gear housing (41) disposed in the transmission housing (1), a planetary gear set (42) disposed in the gear housing (41), the motor output part (22) of the motor shaft (21) passes through the gear housing (41) and is connected to one end of the planetary gear set (42), the other end of the planetary gear set (42) is connected to a bevel transmission gear (43) disposed on the outside of the gear housing (41), the output head (11) is vertically rotatably disposed in the transmission housing (1) and the output head (11) is coaxially fixedly connected to a bevel output gear (44) that meshes with the bevel transmission gear (43).

5. A motor assembly for an open / close shade according to claim 4, wherein The drive motor (2) includes an inner stator (23) and an outer rotor (24) rotatably sleeved on the outer side of the inner stator (23). One end of the outer rotor (24) is closed and the other end is open. A motor shaft (21) is rotatably inserted through the center of the inner stator (23). One end of the motor shaft (21) is connected to the closed end (241) of the outer rotor (24), and the other end of the motor shaft (21) protrudes from the open end (242) of the outer rotor (24) to form the motor output part (22). The circuit board mounting bracket... (3) The bracket fixing structure (5) is set on the outside of the open end (242) of the outer rotor (24) and fixedly connected to the inner stator (23). The circuit board body (31) is set on the side of the circuit board mounting frame (3) away from the outer rotor (24) and the gear housing (41) through the circuit board mounting structure (6). The motor output part (22) of the motor shaft (21) passes through the circuit board mounting frame (3) and the circuit board body (31) in sequence and extends to the side of the circuit board mounting frame (3) away from the outer rotor (24).

6. A motor assembly for an open / close shade according to claim 5, wherein The outer rotor (24) is cylindrical and the inner stator (23), the outer rotor (24) and the motor shaft (21) are coaxially arranged. One end of the inner stator (23) does not extend beyond the open end (242) of the outer rotor (24), and one end of the motor shaft (21) is connected to the center of the closed end (241) of the outer rotor (24).

7. A motor assembly for an open / close shade according to claim 5, wherein The circuit board mounting bracket (3) includes a bracket cylinder (32). The motor shaft (21) is rotatably connected to the bearings (33) on the inner side of both ends of the bracket cylinder (32). One end of the bracket cylinder (32) is fixedly connected to the inner stator (23) through the bracket fixing structure (5). The other end of the bracket cylinder (32) extends to the outside of the open end (242) of the outer rotor (24), and the bracket cylinder (32) has a plurality of bracket mounting plates (34) extending radially outward along the outer side of the bracket cylinder (32).

8. A motor assembly for an open / close shade according to claim 7, wherein The bracket fixing structure (5) includes a stator mounting hole (51) located at the center of the inner stator (23). One end of the bracket cylinder (32) is inserted into the stator mounting hole (51). The bracket cylinder (32) has at least one rib (52) extending axially along the bracket cylinder (32) and abutting against the inner wall of the stator mounting hole (51) on its outer circumferential side. An installation limiting component (7) is provided between the bracket cylinder (32) and the inner stator (23). The installation limiting component (7) includes several limiting protrusions (71) located on the outer circumferential side of the bracket cylinder (32). One end of each limiting protrusion (71) extends to one side of the bracket mounting plate (34) and the other end abuts against one end face of the inner stator (23).

9. A motor assembly for an open / close shade according to claim 7, wherein The circuit board mounting structure (6) includes a circuit board hole (61) located at the center of the circuit board body (31). One end of the bracket cylinder (32) is inserted into the circuit board hole (61). The bracket mounting plate (34) has mounting portions (62) on the side away from the outer rotor (24) that abut against one side of the circuit board body (31). The mounting portions (62) are respectively provided with circuit board mounting holes (63) that penetrate the bracket mounting plate (34). The circuit board body (31) is provided with circuit board positioning holes (64) that correspond one-to-one with the circuit board mounting holes (63). One end of the gear housing (41) has housing positioning holes (65) that correspond one-to-one with the circuit board positioning holes (64). The circuit board positioning holes (64), housing positioning holes (65) and circuit board mounting holes (63) are connected by circuit board mounting bolts.

10. A motor assembly for an open / close shade according to claim 5, wherein The circuit board body (31) has a Hall sensor module corresponding to the outer rotor (24), and the gear housing (41) has circuit board limiting parts (411) on both sides of one end, and the circuit board body (31) has limiting notches (311) on both sides corresponding to the circuit board limiting parts (411).

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