Compact motor limiter structure and tubular motor

Abstract

The utility model provides a compact type motor limiting stopper structure. The compact type motor limiting stopper structure comprises a main body piece, a transmission piece, a rotating piece and an induction piece, one end of the transmission part rotatably sleeves the main body part, and the inner wall of the other end is provided with a gear ring; the rotating piece comprises a first rotating body, a second rotating body and a third rotating body which are rotationally arranged on the end face of the main body piece, the first rotating body is meshed with the gear ring, and the second rotating body and the third rotating body are meshed with the first rotating body; the sequential connecting lines of the center points of the first rotating body, the second rotating body and the third rotating body form a triangle, and the three rotating bodies are all distributed in the same edge area of the end face of the main body piece, so that the rest area of the end face of the main body piece forms a reserved area; the connecting end of the sensing piece is connected to the reserved area; the utility model also provides a tubular motor. The positions of all the parts are compact, the space utilization rate is high, multiple structures can be reasonably integrated to the main body piece, the size of the whole structure is reduced, the device can be installed in a small-caliber reel pipe, and the application scene is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of electric curtains, in particular to a compact motor limiter structure and a tubular motor. Background Art

[0002] With the rapid development of science and technology, various household appliances are also changing and becoming more and more intelligent. Among them, electric smart curtains have been widely used in ordinary people's homes. Most of the existing electric smart curtains are driven by tubular motors. The motor is set in the reel tube. The motor rotates to drive the reel tube to rotate, so as to realize the lifting and lowering of the rolling curtain. When the curtain is raised, the curtain is wound on the reel tube. When it is lowered, the reel tube rotates to unwind the curtain to make it lower.

[0003] Nowadays, a limiter is often added to the motor to control the stroke of the curtain piece. The stroke of the curtain piece is reflected in real time by calculating the rotation angle of the gear in the limiter. In order to further improve the accuracy of the curtain piece stroke control, the existing limiter has a method of increasing the volume of the gear to increase the number of gear teeth accordingly, and also a method of directly increasing the number of gears. However, no matter which of the above methods is used, the volume of the limiter will be increased, and a certain amount of space needs to be reserved in the limiter for routing the power cord and installing the sensor, which further leads to the larger volume of the existing limiter, making it impossible to install it in a small-diameter roller tube, and it needs to be set on the outside of the roller tube, resulting in the electric smart curtains needing to occupy a larger space, affecting the user's perception, and also increasing the manufacturing cost. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present application provides a compact motor limiter structure and a tubular motor.

[0005] A compact motor limiter structure disclosed in the present application includes: a main body, a transmission part, a rotating part and a sensing part; one end of the transmission part is rotatably sleeved on the outside of the main body, and a gear ring is provided on the inner wall of the other end; the rotating part includes a first rotating body, a second rotating body and a third rotating body respectively rotatably arranged on the end face of the main body, the first rotating body is meshed with the gear ring, and the second rotating body and the third rotating body are respectively meshed with the first rotating body; the lines connecting the center points of the first rotating body, the second rotating body and the third rotating body in sequence form a triangle, and the three are all distributed in the same edge area of ​​the end face of the main body, so that the remaining area of ​​the end face of the main body forms a reserved area; the connecting end of the sensing part is connected to the reserved area, and the sensing ends of the sensing part face the first rotating body, the second rotating body and the third rotating body respectively.

[0006] Preferably, the first rotating body includes a first rotating column and a first gear sleeved outside the first rotating column, the second rotating body includes a second rotating column and a second gear sleeved outside the second rotating column, the third rotating body includes a third rotating column and a third gear sleeved on the third rotating column, one end of the first rotating column, one end of the second rotating column and one end of the third rotating column are respectively rotatably arranged on the end surface of the main body, and the three are connected in sequence to form a triangle, the other end of the first rotating column, the other end of the second rotating column and the other end of the third rotating column are respectively rotatably arranged on the sensing member, the first gear is respectively meshed with the ring gear, the second gear and the third gear; the sensing end of the sensing member faces the other end of the first rotating column, the other end of the second rotating column and the other end of the third rotating column.

[0007] Preferably, the sensing component includes a carrying shell and a sensor arranged on the carrying shell, the connecting end of the carrying shell is connected to the reserved area, the end face of the carrying shell is in contact with the end face of the main body, and the carrying shell is provided with three interconnected limiting holes, the first gear, the second gear and the third gear are respectively accommodated in the three limiting holes, the other end of the first rotating column, the other end of the second rotating column and the other end of the third rotating column are respectively rotatably arranged in the three limiting holes, and all face the sensing end of the sensor.

[0008] Preferably, the sensing component includes a carrying shell, a limiting plate and a sensor arranged on the carrying shell, the end face of the carrying shell is in contact with the end face of the main body, the limiting plate is arranged at one end of the carrying shell away from the main body, the first gear, the second gear and the third gear are all located on the side of the carrying shell away from the main body, the other end of the first rotating column, the other end of the second rotating column and the other end of the third rotating column pass through the carrying shell and are respectively rotated and arranged on the limiting plate, and all face the sensing end of the sensor.

[0009] Preferably, at least one connecting column is provided on the end surface of the bearing shell, and at least one connecting hole is opened at a position corresponding to the connecting column in the reserved area, and the connecting column extends into the connecting hole, so that the bearing shell is connected to the main body.

[0010] Preferably, the main body is provided with a first wiring hole, the first wiring hole is located in the reserved area, the carrying shell is provided with a second wiring hole, the second wiring hole is connected to the first wiring hole, and the sensing component also includes a partition plate, the partition plate is arranged at one end of the carrying shell away from the main body, and separates the other end of the first rotating column, the other end of the second rotating column and the other end of the third rotating column from the second wiring hole.

[0011] Preferably, a receiving groove is opened on the end surface of the main body, one end of the first rotating column is rotatably disposed in the receiving groove, one side of the receiving groove is an opening, part of the first gear is located in the receiving groove and meshes with the ring gear through the opening, and the other part of the first gear is located outside the receiving groove and meshes with the second gear and the third gear respectively.

[0012] Preferably, the limiting hole includes a large limiting hole and a small limiting hole, the large limiting hole and the small limiting hole are connected, the first gear, the second gear or the third gear is rotatably arranged in the large limiting hole, and the other end of the first rotating column, the other end of the second rotating column or the other end of the third rotating column is rotatably arranged in the small limiting hole.

[0013] Preferably, the numbers of teeth of the first gear, the second gear and the third gear are mutually prime.

[0014] The present application also provides a tubular motor, including a compact motor limiter structure.

[0015] The beneficial effect of the present application is that since the first rotating body, the second rotating body and the third rotating body are concentrated in the same edge area of ​​the end face of the main body, and the remaining area of ​​the end face of the main body is left vacant to form a reserved area, the sensing parts and wiring holes can be arranged in the reserved area, so that the first rotating body, the second rotating body, the third rotating body, the sensing parts and wiring holes can be reasonably distributed on the main body, and the positions of various parts are compactly arranged, thereby improving the space utilization rate of the present application, so that many structures can be reasonably integrated into the main body, reducing the volume of the compact motor limiter structure, so that it can be installed in a small-diameter winding pipe, and broadening the application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 It is a structural schematic diagram of the compact motor limiter structure in the first embodiment;

[0018] Figure 2 An exploded view of the compact motor limiter structure in Embodiment 1;

[0019] Figure 3 It is a schematic diagram of the structure of the main body, the transmission part and the rotating part in the first embodiment;

[0020] Figure 4 It is a structural schematic diagram of the main body in the first embodiment;

[0021] Figure 5 It is a structural schematic diagram of the transmission member in the first embodiment;

[0022] Figure 6 is a schematic structural diagram of the first rotating body in the first embodiment;

[0023] Figure 7 is a schematic structural diagram of the second rotating body in the first embodiment;

[0024] Figure 8is a schematic structural diagram of the third rotating body in the first embodiment;

[0025] Fig. 9 It is a structural schematic diagram of the induction component in the first embodiment;

[0026] Fig.10 is another structural schematic diagram of the compact motor limiter structure in the first embodiment;

[0027] Fig.11 An exploded view of the compact motor limiter structure in Embodiment 2;

[0028] Fig.12 It is a structural schematic diagram of the compact motor limiter structure in the second embodiment;

[0029] Fig.13 It is a structural schematic diagram of the compact motor limiter structure after the limit plate is removed in the second embodiment;

[0030] Fig.14 It is a schematic diagram of the structure of the first rotating body in the second embodiment.

[0031] Reference numerals:

[0032] 1. Main body; 11. Connecting hole; 12. First wiring hole; 13. Storage slot; 14. First rotating hole; 15. Second rotating hole; 16. Third rotating hole; 17. First fixed hole; 2. Transmission member; 21. Gear ring; 22. Transmission protrusion; 3. Rotating member; 31. First rotating body; 311. First rotating column; 312. First gear; 32. Second rotating body; 321. Second rotating column; 322. Second gear; 33. Third rotating body; 331. Third rotating column; 332. Third gear; 34. Magnet; 4. Inductive member; 41. Carrying shell; 411. Limiting hole; 4111. Large limiting hole; 4112. Small limiting hole; 412. Connecting column; 413. Second wiring hole; 414. Second fixed hole; 42. Limiting plate; 43. Partition plate; 44. Circuit board. DETAILED DESCRIPTION

[0033] The following will disclose multiple embodiments of the present application with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present application. In other words, in some embodiments of the present application, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0034] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0035] In addition, in the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present application. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0036] In order to further understand the application content, features and effects of the present application, the following embodiments are cited and described in detail with reference to the accompanying drawings.

[0037] Embodiment 1:

[0038] Reference Figure 1-3 , Figure 1 is a schematic diagram of the structure of the compact motor limiter structure in the first embodiment, Figure 2 This is an exploded view of the compact motor limiter structure in the first embodiment. Figure 3 The structure diagram of the main body, transmission member and rotating member in the first embodiment, the compact motor limiter structure in this embodiment includes a main body 1, a transmission member 2, a rotating member 3 and a sensing member 4. One end of the transmission member 2 is rotatably sleeved outside the main body 1, and the inner wall of the other end is provided with a gear ring 21. The rotating member 3 includes a first rotating body 31, a second rotating body 32 and a third rotating body 33 which are respectively rotatably arranged on the end surface of the main body 1, the first rotating body 31 is meshed with the gear ring 21, and the second rotating body 32 and the third rotating body 33 are respectively meshed with the first rotating body 31. The lines connecting the center points of the first rotating body 31, the second rotating body 32 and the third rotating body 33 are triangles, and the three are distributed in the same edge area of ​​the end surface of the main body 1, so that the remaining area of ​​the end surface of the main body 1 forms a reserved area. The connecting end of the sensing member 4 is connected to the reserved area, and the sensing ends of the sensing member 4 face the first rotating body 31, the second rotating body 32 and the third rotating body 33 respectively.

[0039] Refer to Figure 4-5 , Figure 4 is a schematic diagram of the structure of the main body in the first embodiment, Figure 5This is a schematic diagram of the structure of the transmission member in Example 1. The compact motor limiter structure in this embodiment is applied to the tubular motor. The tubular motor formed by assembling the compact motor limiter structure in this embodiment is also introduced in this embodiment. Specifically, the tubular motor includes a driving motor and a compact motor limiter structure. In specific applications, the driving end of the driving motor is connected to the roller tube of the curtain and can drive the roller tube to rotate, thereby driving the curtain piece wound outside the roller tube to achieve lifting. The outer wall of the transmission member 2 is provided with a plurality of transmission protrusions 22, and the inner wall of the roller tube is provided with a transmission groove. Through the cooperation between the transmission protrusion 22 and the transmission groove, the transmission member 2 can achieve synchronous rotation with the roller tube. When the transmission member 2 rotates, it drives the first rotating body 31 to rotate through the ring gear 21, and the rotation of the first rotating body 31 drives the second rotating body 32 and the third rotating body 33 to rotate synchronously. The sensing member 4 obtains the rotation number information of the first rotating body 31, the second rotating body 32 and the third rotating body 33 by sensing the rotation angles of the first rotating body 31, the second rotating body 32 and the third rotating body 33, that is, the rotation number information of the roller tube and the displacement stroke information of the curtain piece. The sensing member 4 is electrically connected to the driving motor, and the driving motor can receive the above information and accurately control the rotation of the roller tube and the displacement stroke of the curtain piece. It should be noted that, since the first rotating body 31, the second rotating body 32 and the third rotating body 33 are concentrated in the same edge area of ​​the end face of the main body 1, and the rest of the end face of the main body 1 is left free to form a reserved area, the sensing part 4 and the wiring holes can be set in the reserved area, so that the first rotating body 31, the second rotating body 32, the third rotating body 33, the sensing part 4 and the wiring holes can be reasonably distributed on the main body 1, and the positions of various parts are arranged compactly, which improves the space utilization of this embodiment, so that many structures can be reasonably integrated into the main body 1, reducing the volume of the compact motor limiter structure, so that it can be installed in a small-diameter winding tube, and broadening the application scenario. The end face of the main body 1 described in the present application is the side of the main body 1 facing the sensing part 4.

[0040] Refer to Figure 6-8 , Figure 6 is a schematic structural diagram of the first rotating body in the first embodiment, Figure 7 is a schematic diagram of the structure of the second rotating body in the first embodiment, Figure 8The schematic diagram of the structure of the third rotating body in the first embodiment is as follows. Preferably, the first rotating body 31 includes a first rotating column 311 and a first gear 312 sleeved outside the first rotating column 311, the second rotating body 32 includes a second rotating column 321 and a second gear 322 sleeved outside the second rotating column 321, and the third rotating body 33 includes a third rotating column 331 and a third gear 332 sleeved on the third rotating column 331. One end of the first rotating column 311, one end of the second rotating column 321 and one end of the third rotating column 331 are respectively rotatably disposed on the end surface of the main body 1, and the three are connected in sequence to form a triangle. The other end of the first rotating column 311, the other end of the second rotating column 321 and the other end of the third rotating column 331 are respectively rotatably disposed on the sensing member 4, and the first gear 312 is meshed with the gear ring 21, the second gear 322 and the third gear 332 respectively. The sensing end of the sensing member 4 faces the other end of the first rotating column 311, the other end of the second rotating column 321 and the other end of the third rotating column 331. In specific application, the second rotating column 321 can be divided into three areas along its axial direction: one end, the middle and the other end, wherein the end surface of the main body 1 is provided with a second rotating hole 15 at a position corresponding to the second rotating column 321, one end of the second rotating column 321 is rotatably arranged in the second rotating hole 15, the second gear 322 is fixedly sleeved in the middle of the second rotating column 321, and the end surface of the other end of the second rotating column 321 is provided with a magnet groove, and a magnet 34 is arranged in the magnet groove, and the magnet 34 faces the sensing end of the sensing member 4. The structure of the third rotating body 33 is similar to that of the second rotating body 32, and the end surface of the main body 1 is provided with a third rotating hole 16 at a position corresponding to the third rotating body 33, which will not be described in detail here. The first rotating column 311 can also be divided into three areas along its axial direction: one end, the middle and the other end. A receiving groove 13 is provided on the end surface of the main body 1 corresponding to one end of the first rotating column 311, and a first rotating hole 14 is provided at the bottom of the receiving groove 13. One end of the first rotating column 311 is rotatably arranged in the first rotating hole 14, and the first gear 312 is fixedly sleeved in the middle of the first rotating column 311. A magnet groove is provided on the end surface of the other end of the first rotating column 311, and a magnet 34 is provided in the magnet groove. Specifically, the size of the first gear 312 is larger than that of the second gear 322 and the third gear 332. The first gear 312 can be divided into two parts, one part of the first gear 312 is accommodated in the storage groove 13, and the other part of the first gear 312 is located outside the storage groove 13 and meshes with the second gear 322 and the third gear 332 respectively. One side wall of the storage groove 13 is an opening, and one part of the first gear 312 meshes with the ring gear 21 through the opening. In this way, the position setting of the first gear 312 is more reasonable, and the occupation of the end face space of the main body 1 is reduced as much as possible, so that a larger first gear 312 or a first gear with more teeth can be set to meet the accuracy requirements of the limiter stroke control.

[0041] Reference Figure 9-10 , Fig. 9is a schematic diagram of the structure of the induction element in the first embodiment, Fig.10 This is another structural schematic diagram of the compact motor limiter structure in Example 1. Preferably, the sensing component 4 includes a carrying shell 41 and a sensor arranged in the carrying shell 41. The connecting end of the carrying shell 41 is connected to the reserved area. The end face of the carrying shell 41 is in contact with the end face of the main body 1. The carrying shell 41 is provided with three interconnected limiting holes 411. The first gear 312, the second gear 322 and the third gear 332 are respectively accommodated in the three limiting holes 411. The other end of the first rotating column 311, the other end of the second rotating column 321 and the other end of the third rotating column 331 are respectively rotatably arranged in the three limiting holes 411, and all face the sensing end of the sensor. In specific applications, when the supporting shell 41 is connected to the main body 1, the end face of the supporting shell 41 is in contact with the end face of the main body 1, that is, the first rotating body 31 is accommodated in the first rotating hole 14, the receiving groove 13 and one of the limiting holes 411, the second rotating body 32 is accommodated in the second rotating hole 15 and the other limiting hole 411, and the third rotating body 33 is also accommodated in the corresponding rotating hole and the limiting hole 411. The three rotating bodies are all accommodated inside the main body 1 and the supporting shell 41, so that the end face of the supporting shell 41 is in contact with the end face of the main body 1, which improves the space utilization and reduces the axial length and volume of this embodiment. Furthermore, one end of the first rotating column 311, one end of the second rotating column 321 and one end of the third rotating column 331 are respectively rotatably arranged in the three rotating holes, and the other end of the first rotating column 311, the other end of the second rotating column 321 and the other end of the third rotating column 331 are respectively rotatably arranged in the supporting shell 41. That is to say, the main body 1 limits one end of the first rotating column 311, one end of the second rotating column 321 and one end of the third rotating column 331 through the three rotating holes to avoid radial deviation, and the supporting shell 41 limits the other end of the first rotating column 311, the other end of the second rotating column 321 and the other end of the third rotating column 331 through the three limiting holes 411 to avoid radial deviation, that is, both ends of the first rotating column 311, the second rotating column 321 and the third rotating column 331 are limited in the radial direction, so that the three can rotate stably without radial shaking, thereby improving the stability of the rotating structure.

[0042] Re-reference Fig. 9Preferably, the limiting hole 411 includes a limiting large hole 4111 and a limiting small hole 4112, the limiting large hole 4111 and the limiting small hole 4112 are connected, the first gear 312, the second gear 322 or the third gear 332 is rotatably disposed in the limiting large hole 4111, and the other end of the first rotating column 311, the other end of the second rotating column 321 or the other end of the third rotating column 331 is rotatably disposed in the limiting small hole 4112. In specific applications, one end of the first rotating column 311, one end of the second rotating column 321 and one end of the third rotating column 331 are rotatably disposed in the three rotating holes respectively, the first gear 312, the second gear 322 and the third gear 332 are respectively accommodated in the three limiting large holes 4111, and the other end of the first rotating column 311, the other end of the second rotating column 321 and the other end of the third rotating column 331 are rotatably disposed in the three limiting small holes 4112 respectively. Specifically, in this embodiment, a circuit board 44 is provided on the carrying shell 41, and a Hall sensor is integrated on the circuit board 44. The Hall sensor senses the magnetic field of the magnet 34 on the other end of the first rotating column 311, the other end of the second rotating column 321 and the other end of the third rotating column 331 respectively.

[0043] Re-reference Fig. 9 Preferably, at least one connecting column 412 is provided on the end surface of the bearing shell 41, and at least one connecting hole 11 is opened at the position of the reserved area corresponding to the connecting column 412, and the connecting column 412 extends into the connecting hole 11, so that the bearing shell 41 is connected to the main body 1. Through the arrangement of the connecting column 412 and the connecting hole 11, the bearing shell 41 can be stably connected to the main body 1, and the connecting column 412 completely extends into the connecting hole 11, that is, the end surface of the bearing shell 41 can be kept in contact with the end surface of the main body 1, the structural layout is reasonable and compact, and the volume of the compact motor limiter structure is reduced. Specifically, in the present embodiment, the number of connecting columns 412 and the number of connecting holes 11 are both three, one connecting column 412 is corresponding to one connecting hole 11, the three connecting holes 11 are sequentially connected to form a triangle, and the three connecting holes 11 are all opened in the reserved area. Furthermore, the shapes and sizes of the three connecting holes 11 are different. The number, shape and size of the connecting holes 11 can be determined according to the size of the reserved area, the size of the space occupied by the rotating part 3, and the size of the space required to be reserved for wiring, so that the structural layout of the present embodiment is reasonable and compact.

[0044] Re-reference Figure 4 and Fig. 9Preferably, the main body 1 is provided with a first wiring hole 12, the first wiring hole 12 is located in the reserved area, the carrying shell 41 is provided with a second wiring hole 413, the second wiring hole 413 is connected to the first wiring hole 12, and the sensing component 4 also includes a partition plate 43, the partition plate 43 is arranged at one end of the carrying shell 41 away from the main body 1, and separates the other end of the first rotating column 311, the other end of the second rotating column 321 and the other end of the third rotating column 331 from the second wiring hole 413. In specific applications, in this embodiment, the first rotating column 311, the second rotating column 321 and the third rotating column 331 are located in the same edge area of ​​the end face of the main body 1, and the first wiring hole 12 is located in the other edge area of ​​the end face of the main body 1. That is to say, the three rotating columns are concentrated close to one side of the end face of the main body 1, and the first wiring hole 12 is close to the opposite side of the end face of the main body 1. The connecting hole 11 is located between the rotating column and the first wiring hole 12. In this way, the three rotating columns, the three connecting holes 11 and the first wiring hole 12 can be integrated into the end face of the main body 1. The structural layout and arrangement are reasonable and compact. In addition, a first fixing hole 17 can be opened at the center position of the end face of the main body 1, and the bearing shell 41 is also provided with a corresponding second fixing hole 414. The use of screws and fixing holes can improve the stability of the connection between the main body 1 and the bearing shell 41. At the same time, through the setting of the partition plate 43, the other end of the first rotating column 311, the other end of the second rotating column 321 and the other end of the third rotating column 331 are separated from the second wiring hole 413, which is equivalent to separating an independent wiring space. The power cord can be stored in the wiring space to avoid the power cord being entangled with the rotating member 3 during operation, and the partition plate 43 is also used to support the circuit board 44.

[0045] Preferably, the numbers of teeth of the first gear 312, the second gear 322 and the third gear 332 are mutually prime. In specific applications, the driving motor drives the winding tube to rotate, thereby driving the transmission member 2 to achieve synchronous rotation. When the transmission member 2 rotates, the first gear 312 and the first rotating column 311 are driven to rotate through the gear ring 21. The rotation of the first gear 312 and the first rotating column 311 drives the second rotating column 321, the second gear 322, the third rotating column 331 and the third gear 332 to rotate synchronously, so that the magnet 34 also rotates synchronously. The sensor senses the magnetic field changes of the magnet 34 on the first rotating column 311, the second rotating column 321 and the third rotating column 331, thereby obtaining the rotation angle information of the first rotating column 311, the second rotating column 321 and the third rotating column 331 in real time, thereby obtaining the rotation circle information of the first gear 312, the second gear 322 and the third gear 332, that is, obtaining the rotation circle information of the roller tube and the displacement stroke information of the curtain piece, and the circuit board 44 integrated with the sensor is electrically connected to the drive motor, and the drive motor can receive the above information and accurately control the rotation of the roller tube and the displacement stroke of the curtain piece. Since the sensor obtains the angle information of the magnet 34, that is, the rotation angle information of the first rotating column 311, the second rotating column 321 and the third rotating column 331, by setting the number of teeth of the first gear 312, the second gear 322 and the third gear 332 to be mutually prime, it can be made that within the range of the least common multiple of the number of turns of the three gear teeth, the angles between the three gears will not be repeated within the range, and by sensing the angle information of the three gears at a certain moment, the number of turns of the first rotating column 311, the second rotating column 321 and the third rotating column 331 can be calculated, that is, the number of turns of the roller tube and the displacement stroke information of the curtain sheet. In this way, the range of stroke control is increased and the accuracy of stroke control is improved. At the same time, the accuracy of stroke control can be improved without increasing the volume of the first gear 312, the second gear 322 and the third gear 332 to increase the number of teeth. In this way, smaller gears can be selected for assembly, which is convenient for this embodiment to achieve compactness and small volume.

[0046] Embodiment 2:

[0047] Reference Figure 11-Figure 14 , Fig.11 This is an exploded view of the compact motor limiter structure in the second embodiment. Fig.12 is a schematic diagram of the structure of the compact motor limiter structure in the second embodiment, Fig.13 Schematic diagram of the structure of the compact motor limiter structure after the limit plate is removed in the second embodiment. Fig.14It is a structural schematic diagram of the first rotating body in Example 2. The difference between the compact motor limiter structure in this embodiment and that in Example 1 is that the sensing part 4 in this embodiment includes a bearing shell 41, a limiting plate 42 and a sensor arranged on the bearing shell 41. The end face of the bearing shell 41 is in contact with the end face of the main body 1. The limiting plate 42 is arranged at the end of the bearing shell 41 away from the main body 1. The first gear 312, the second gear 322 and the third gear 332 are all located on the side of the bearing shell 41 away from the main body 1. The other end of the first rotating column 311, the other end of the second rotating column 321 and the other end of the third rotating column 331 pass through the bearing shell 41 and are respectively rotated and arranged on the limiting plate 42, and all face the sensing end of the sensor. That is to say, the other ends of the three rotating columns in the first embodiment are all rotatably disposed in the supporting shell 41, while the other ends of the three rotating columns in this embodiment pass through the supporting shell 41 and are rotatably disposed on the limiting plate 42. The first gear 312, the second gear 322 and the third gear 332 in this embodiment are all located between the supporting shell 41 and the limiting plate 42, which is equivalent to the limiting plate 42 limiting the other ends of the three rotating columns in the radial direction. In specific applications, when the compact motor limiter structure is installed in the winding tube, since the bearing shell 41 is installed with the main body 1 by extending the connecting column 412 into the connecting hole 11, the connecting column 412 bears most of the force. On the one hand, it is due to the radial force generated by the gravity of the main body 1 itself and the winding tube, and on the other hand, when the transmission member 2 rotates, it will also be subject to force in the rotation direction. In this case, it is necessary to set a longer and thicker connecting column 412, as well as a thicker main body 1 and bearing shell 41, which is not conducive to compact and compact design. Compared with the first embodiment, most of the areas of the three rotating columns in this embodiment are located in the bearing shell 41, which can disperse the force originally borne by the connecting column 412, thereby improving the stability of the structure. At the same time, since the rotating column can effectively share the force of the connecting column 412, the thickness of the main body 1 and the bearing shell 41 of this embodiment can be reduced compared with the thickness of the first embodiment, thereby further realizing a compact and compact design. In addition, since part of the second rotating column 321 and the third rotating column 331 are both located in the bearing shell 41, that is, the bearing shell 41 plays an auxiliary limiting role for one end of the second rotating column 321 and one end of the third rotating column 331, so there is no need to set the second rotating hole 15 and the third rotating hole 16 on the end surface of the main body 1 of this embodiment, so as to leave a larger reserved area. Specifically, in this embodiment, there are two first gears 312, one of which is located in the receiving groove 13 and meshed with the gear ring 21, and the other first gear 312 is set at the other end of the first rotating column 311 and meshed with the second gear 322 and the third gear 332 respectively, and the first rotating column 311 between the two first gears 312 is rotatably set in the bearing shell 41.

[0048] To summarize, since the first rotating body 31, the second rotating body 32 and the third rotating body 33 are concentratedly arranged on the same edge area of ​​the end face of the main body 1, and the remaining area of ​​the end face of the main body 1 is left vacant to form a reserved area, the sensing part 4 and the wiring holes can be arranged in the reserved area, so that the first rotating body 31, the second rotating body 32, the third rotating body 33, the sensing part 4 and the wiring holes can be reasonably distributed on the main body 1, and the positions of various parts are compactly arranged, which improves the space utilization rate of this embodiment, so that many structures can be reasonably integrated into the main body 1, reducing the volume of the compact motor limiter structure, so that it can be installed in a small-diameter winding pipe, and broadening the application scenarios.

[0049] The above is only the implementation mode of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A compact motor limiter structure, characterized in that: include: Main body (1); A transmission member (2), one end of which is rotatably sleeved outside the main member (1), and the inner wall of the other end of which is provided with a gear ring (21); A rotating member (3), comprising a first rotating body (31), a second rotating body (32) and a third rotating body (33) which are respectively rotatably arranged on the end surface of the main member (1), the first rotating body (31) meshing with the gear ring (21), the second rotating body (32) and the third rotating body (33) respectively meshing with the first rotating body (31); the lines connecting the center points of the first rotating body (31), the second rotating body (32) and the third rotating body (33) in sequence form a triangle, and the three rotating bodies are all distributed in the same edge area of ​​the end surface of the main member (1), so that the remaining area of ​​the end surface of the main member (1) forms a reserved area; and The sensing member (4) has a connecting end connected to the reserved area, and the sensing ends of the sensing member (4) face the first rotating body (31), the second rotating body (32) and the third rotating body (33) respectively.

2. The compact motor limiter structure according to claim 1, characterized in that: The first rotating body (31) comprises a first rotating column (311) and a first gear (312) sleeved outside the first rotating column (311); the second rotating body (32) comprises a second rotating column (321) and a second gear (322) sleeved outside the second rotating column (321); the third rotating body (33) comprises a third rotating column (331) and a third gear (332) sleeved on the third rotating column (331); one end of the first rotating column (311), one end of the second rotating column (321) and one end of the third rotating column (331) rotate respectively. The first rotating column (311), the second rotating column (321) and the third rotating column (331) are respectively rotatably arranged on the sensing component (4), and the first gear (312) is respectively meshed with the gear ring (21), the second gear (322) and the third gear (332); the sensing end of the sensing component (4) faces the other end of the first rotating column (311), the other end of the second rotating column (321) and the other end of the third rotating column (331).

3. The compact motor limiter structure according to claim 2, characterized in that: The sensing component (4) comprises a bearing shell (41) and a sensor arranged on the bearing shell (41); the connection end of the bearing shell (41) is connected to the reserved area; the end surface of the bearing shell (41) is in contact with the end surface of the main body (1); the bearing shell (41) is provided with three interconnected limiting holes (411); the first gear (312), the second gear (322) and the third gear (332) are respectively and correspondingly accommodated in the three limiting holes (411); the other end of the first rotating column (311), the other end of the second rotating column (321) and the other end of the third rotating column (331) are respectively and correspondingly rotatably arranged in the three limiting holes (411) and all face the sensing end of the sensor.

4. The compact motor limiter structure according to claim 2, characterized in that: The sensing component (4) comprises a bearing shell (41), a limiting plate (42) and a sensor arranged on the bearing shell (41); the end surface of the bearing shell (41) is in contact with the end surface of the main body (1); the limiting plate (42) is arranged at one end of the bearing shell (41) away from the main body (1); the first gear (312), the second gear (322) and the third gear (332) are all located on the side of the bearing shell (41) away from the main body (1); the other end of the first rotating column (311), the other end of the second rotating column (321) and the other end of the third rotating column (331) pass through the bearing shell (41) and are respectively rotated and arranged on the limiting plate (42), and all face the sensing end of the sensor.

5. The compact motor limiter structure according to claim 3 or 4, characterized in that: The end surface of the bearing shell (41) is provided with at least one connecting column (412), and the reserved area is provided with at least one connecting hole (11) at a position corresponding to the connecting column (412), and the connecting column (412) extends into the connecting hole (11), so that the bearing shell (41) is connected to the main body (1).

6. The compact motor limiter structure according to claim 3 or 4, characterized in that: The main body (1) is provided with a first wiring hole (12), and the first wiring hole (12) is located in the reserved area. The bearing shell (41) is provided with a second wiring hole (413), and the second wiring hole (413) is connected to the first wiring hole (12). The sensing component (4) also includes a partition plate (43), and the partition plate (43) is arranged at one end of the bearing shell (41) away from the main body (1), and separates the other end of the first rotating column (311), the other end of the second rotating column (321) and the other end of the third rotating column (331) from the second wiring hole (413).

7. The compact motor limiter structure according to claim 2, characterized in that: A receiving groove (13) is provided on the end surface of the main body (1), one end of the first rotating column (311) is rotatably disposed in the receiving groove (13), one side of the receiving groove (13) is an opening, a portion of the first gear (312) is located in the receiving groove (13) and meshes with the gear ring (21) through the opening, and another portion of the first gear (312) is located outside the receiving groove (13) and meshes with the second gear (322) and the third gear (332) respectively.

8. The compact motor limiter structure according to claim 3, characterized in that: The limiting hole (411) comprises a large limiting hole (4111) and a small limiting hole (4112); the large limiting hole (4111) and the small limiting hole (4112) are connected; the first gear (312), the second gear (322) or the third gear (332) is rotatably disposed in the large limiting hole (4111); the other end of the first rotating column (311), the other end of the second rotating column (321) or the other end of the third rotating column (331) is rotatably disposed in the small limiting hole (4112).

9. The compact motor limiter structure according to claim 2, characterized in that: The numbers of teeth of the first gear (312), the second gear (322) and the third gear (332) are mutually prime.

10. A tubular motor, characterized in that: It comprises a compact motor limiter structure as described in any one of claims 1-9.

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