Small-size motor limiter structure and tubular motor

Abstract

The utility model provides a small-size motor limiting stopper structure. The small-size motor limiting stopper structure comprises a main body part, a gear ring part, an induction part, a first rotating part and a second rotating part, the induction piece comprises a bearing shell and a sensor. One end of the bearing shell is connected to the end face of the body piece. The first rotating piece comprises a first rotating column, a first gear and a second gear, one end of the first rotating column is rotationally arranged on the end face of the main body piece, and the second gear is located at the other end of the bearing shell; the second rotating part comprises a second rotating column and a third gear, one end of the second rotating column is rotationally arranged in the bearing shell, and the third gear is located at the other end of the bearing shell and engaged with the second gear; the utility model also provides a tubular motor. The positions of all the components are compact and reasonable, under the condition that the size is small and exquisite, the third gear with the large size and the large number of teeth is arranged, the space utilization rate and the stroke control accuracy are improved, 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 small-volume 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, the travel of the curtain piece is controlled by adding a limiter to the motor, and the limiter usually includes a gear part and a sensor part. The gear part is provided with a plurality of gears that rotate synchronously with the winding tube, and the sensor part calculates the travel information of the curtain piece by sensing the rotation angle of the gear. In order to improve the accuracy of the curtain piece travel control, the existing limiter has a method of increasing the volume of the gear to increase the number of gear teeth accordingly, and a method of directly increasing the number of gears. However, no matter which of the above methods is used, the gear needs to occupy a larger space of the gear part, and space needs to be reserved on the gear part to connect with the sensor part, as well as space for the power line routing. This results in a larger volume of the existing limiter, which not only increases the manufacturing cost, but also makes it impossible to set the limiter in the winding tube, affecting the user's perception. Utility Model Content

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

[0005] A small-volume motor limiter structure disclosed in the present application includes: a main body, a ring gear part, a sensing part, a first rotating part and a second rotating part; one end of the ring gear part is rotatably mounted on the outside of the main body, and a ring gear is provided on the inner wall of the other end; the sensing part includes a bearing shell and a sensor, one end of the bearing shell is connected to the end face of the main body, and the sensor is arranged at the other end of the bearing shell; the first rotating part includes a first rotating column and a first gear and a second gear mounted outside the first rotating column, one end of the first rotating column is rotatably mounted on the end face of the main body, the other end of the first rotating column extends in a direction away from the bearing shell after passing through the bearing shell and faces the sensor, the first gear is meshed with the ring gear, and the second gear is located at the other end of the bearing shell; the second rotating part includes a second rotating column and a third gear mounted outside the second rotating column, one end of the second rotating column is rotatably mounted in the bearing shell, the other end of the second rotating column extends in a direction away from the end face of the main body after passing through the bearing shell and faces the sensor, the third gear is located at the other end of the bearing shell and meshed with the second gear.

[0006] Preferably, the sensing component further includes a limiting plate, which is disposed at the other end of the bearing shell, and the other end of the first rotating column and the other end of the second rotating column are both rotatably disposed on the limiting plate.

[0007] Preferably, at least one connecting column is provided at one end of the bearing shell, and at least one connecting hole is opened on the end surface of the main body at the position corresponding to the connecting column. The connecting column extends into the connecting hole, so that the bearing shell is connected to the main body, and one end of the bearing shell is in contact with the end surface of the main body.

[0008] Preferably, the main body is provided with a receiving groove, one end of the first rotating column and the first gear are both accommodated in the receiving groove, one side of the receiving groove is an opening, and the first gear is meshed with the gear ring through the opening.

[0009] Preferably, the main body is provided with a first wiring hole, the bearing shell is provided with a second wiring hole, and the second wiring hole is connected to the first wiring hole.

[0010] Preferably, the sensing component further includes a partition plate, which is disposed at the other end of the bearing shell and separates the second gear and the third gear from the second wiring hole.

[0011] Preferably, a limiting hole is formed in the bearing shell, one end of the second rotating column is rotatably disposed in the limiting hole, an axial limiting ring is provided on the inner wall of the limiting hole, a limiting groove is formed at one end of the second rotating column corresponding to the position of the axial limiting ring, the axial limiting ring is embedded in the limiting groove, and limits the axial movement of the second rotating column.

[0012] Preferably, the main body is provided with a first fixing hole, the load-bearing shell is provided with a second fixing hole at a position corresponding to the first fixing hole, and the first fixing hole is communicated with the second fixing hole.

[0013] Preferably, the other end of the first rotating column and the other end of the second rotating column are both provided with magnets.

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

[0015] The beneficial effect of the present application is that since the second gear and the third gear are both located at the other end of the bearing shell, they do not need to occupy the space on the end face of the main body, leaving sufficient space for the wiring holes, the connection of the bearing shell, etc., and in this way, a third gear with a larger volume and a larger number of teeth can be set, thereby improving the accuracy of the limiter's control over the curtain blade stroke.

[0016] At the same time, one end of the first rotating column and one end of the second rotating column are limited by the rotating hole and the bearing shell respectively, and the limiting plate limits the other end of the first rotating column and the other end of the second rotating column respectively, avoiding axial or radial displacement of the first rotating column and the second rotating column during rotation, thereby improving the stability of rotation.

[0017] In addition, since parts of the first rotating column and the second rotating column are located inside the load-bearing shell, the force originally borne by the connecting column can be dispersed, thereby improving the stability of the structure. At the same time, since the first rotating column and the second rotating column can effectively share the force of the connecting column, the thickness of the main body and the load-bearing shell can be further reduced, thereby reducing the overall volume.

[0018] The positions of the components of the present application are compact and reasonable. While ensuring a small size, a third gear with a larger volume and a larger number of teeth is set, which improves space utilization and the accuracy of stroke control, allowing it to be installed in a small-diameter winding tube, broadening the application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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:

[0020] Figure 1 It is a structural schematic diagram of a small-volume motor limiter structure in an embodiment;

[0021] Figure 2 An exploded view of the small-volume motor limiter structure in the embodiment;

[0022] Figure 3 It is a schematic structural diagram of the main body, the gear ring, the first rotating member and the second rotating member in the embodiment;

[0023] Figure 4 It is a structural schematic diagram of a small-volume motor limiter structure after removing the limit plate in the embodiment;

[0024] Figure 5 It is a structural schematic diagram of the main body in the embodiment;

[0025] Figure 6 It is a schematic structural diagram of one end of the load-bearing shell in the embodiment;

[0026] Figure 7 is a schematic structural diagram of the other end of the load-bearing shell in the embodiment;

[0027] Figure 8 It is a structural schematic diagram of a small-volume motor limiter structure with a limit plate in an embodiment;

[0028] Fig. 9 is a schematic structural diagram of the first rotating member in the embodiment;

[0029] Fig.10 Schematic diagram of the structure of the second rotating member in the embodiment.

[0030] Reference numerals:

[0031] 1. Main body; 11. Connecting hole; 12. Receiving groove; 121. Rotating hole; 13. First wiring hole; 14. First fixing hole; 2. Gear ring; 21. Gear ring; 3. Inductive component; 31. Carrying shell; 311. Connecting column; 312. Second wiring hole; 313. Limiting hole; 3131. Axial limiting ring; 314. Second fixing hole; 32. Limiting plate; 33. Partition plate; 34. Circuit board; 4. First rotating member; 41. First rotating column; 411. First area; 412. Second area; 413. Third area; 414. Fourth area; 415. Fifth area; 42. First gear; 43. Second gear; 5. Second rotating member; 51. Second rotating column; 511. Limiting groove; 52. Third gear; 53. Rotating bolt. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Reference Figure 1-Figure 3 , Figure 1It is a structural schematic diagram of the small-volume motor limiter structure in the embodiment, Figure 2 It is an exploded view of the small-volume motor limiter structure in the embodiment. Figure 3 Schematic diagram of the structure of the main body, the ring gear, the first rotating member and the second rotating member in the embodiment. The small-volume motor limiter structure in this embodiment includes a main body 1, a ring gear 2, a sensing member 3, a first rotating member 4 and a second rotating member 5. One end of the ring gear 2 is rotatably sleeved outside the main body 1, and a ring gear 21 is provided on the inner wall of the other end. The sensing member 3 includes a bearing shell 31 and a sensor. One end of the bearing shell 31 is connected to the end face of the main body 1, and the sensor is provided at the other end of the bearing shell 31. The first rotating member 4 includes a first rotating column 41 and a first gear 42 and a second gear 43 sleeved outside the first rotating column 41. One end of the first rotating column 41 is rotatably provided on the end face of the main body 1, and the other end of the first rotating column 41 extends in a direction away from the bearing shell 31 after passing through the bearing shell 31 and faces the sensor. The first gear 42 is meshed with the ring gear 21, and the second gear 43 is located at the other end of the bearing shell 31. The second rotating member 5 includes a second rotating column 51 and a third gear 52 sleeved on the second rotating column 51. One end of the second rotating column 51 is rotatably disposed in the supporting shell 31. The other end of the second rotating column 51 passes through the supporting shell 31 and extends in a direction away from the end face of the main body 1 and faces the sensor. The third gear 52 is located at the other end of the supporting shell 31 and meshes with the second gear 43.

[0037] Refer to Figure 4 , Figure 4This is a structural schematic diagram of the small-volume motor limiter structure after the limit plate is removed in the embodiment. The small-volume motor limiter structure in this embodiment is applied to the tubular motor, and the tubular motor formed by assembling the small-volume motor limiter structure in this embodiment is also introduced in this embodiment. Specifically, the tubular motor includes a drive motor and a small-volume motor limiter structure. In specific applications, the drive end of the drive 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 gear ring member 2 is provided with a protrusion, and the inner wall of the roller tube is provided with a transmission groove. Through the cooperation between the protrusion and the transmission groove, the gear ring member 2 can achieve synchronous rotation with the roller tube. When the gear ring 2 rotates, it drives the first gear 42 to rotate through the gear ring 21. The rotation of the first gear 42 drives the second gear 43 to rotate through the first rotating column 41. The rotation of the second gear 43 drives the third gear 52 and the second rotating column 51 to rotate synchronously. The sensor obtains the number of rotations of the first rotating column 41 and the second rotating column 51 by sensing the rotation angle of the first rotating column 41 and the second rotating column 51, that is, the number of rotations of the roller tube and the displacement stroke information of the curtain piece. 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. It should be noted that, since the second gear 43 and the third gear 52 are both located at the other end of the bearing shell 31, they do not need to occupy the space on the end face of the main body 1, leaving enough space for the wiring hole, the connection of the bearing shell 31, etc., and in this way, a third gear 52 with a larger volume and a larger number of teeth can be set, thereby improving the accuracy of the limiter for the curtain blade stroke control. The positions of the various components of this embodiment are compact and reasonable. While ensuring a small volume, a third gear 52 with a larger volume and a larger number of teeth is set, which improves the space utilization and the accuracy of the stroke control, so that it can be installed in a small-diameter winding tube, broadening the application scenario. The end face of the main body 1 described in this application is the side of the main body 1 facing the sensor 3.

[0038] Reference Figure 5 , Figure 5The schematic diagram of the structure of the main body in the embodiment is shown in FIG. 1 . Preferably, the main body 1 is provided with a receiving groove 12, and one end of the first rotating column 41 and the first gear 42 are both accommodated in the receiving groove 12. One side of the receiving groove 12 is an opening, and the first gear 42 meshes with the gear ring 21 through the opening. By setting the receiving groove 12, one end of the first rotating column 41 and the first gear 42 can be accommodated in the receiving groove 12, so that when the main body 1 is connected to the bearing shell 31, the end face of the main body 1 can be attached to one end of the bearing shell 31, reducing the axial length of the two after the connection to reduce the overall volume of the small-volume motor limiter structure. It should be particularly noted that one end of the second rotating column 51 is rotatably arranged in the bearing shell 31, that is, the end face of the main body 1 does not need to have an additional rotating hole for one end of the second rotating column 51, saving space on the end face of the main body 1. Specifically, a rotation hole 121 is defined at the bottom of the receiving groove 12 , one end of the first rotation column 41 is rotatably disposed in the rotation hole 121 , and the first gear 42 is accommodated in the receiving groove 12 .

[0039] Reference Figure 6 and Figure 7 , Figure 6 This is a schematic diagram of the structure of one end of the load-bearing shell in the embodiment. Figure 7 The figure is a schematic diagram of the structure of the other end of the bearing shell in the embodiment. Preferably, at least one connecting column 311 is provided at one end of the bearing shell 31, and at least one connecting hole 11 is provided at the position of the end surface of the main body 1 corresponding to the connecting column 311. The connecting column 311 extends into the connecting hole 11, so that the bearing shell 41 is connected to the main body 1, and one end of the bearing shell 31 is in contact with the end surface of the main body 1. In specific applications, in the present embodiment, the number of connecting columns 311 and connecting holes 11 are both three, one connecting column 311 is provided corresponding to one connecting hole 11, and the three connecting holes 11 are respectively provided on the end surface of the main body 1 and the lines connected in sequence form a triangle. Through the provision of the connecting columns 311 and the connecting holes 11, the bearing shell 31 can be stably connected to the main body 1, and the connecting columns 311 are fully extended into the connecting holes 11, that is, the state in which one end of the bearing shell 31 is in contact with the end surface of the main body 1 can be maintained, and the structure is compact and the volume is reduced. At the same time, as the gear ring 2 rotates to drive the first rotating column 41 and the first gear 42 to rotate, the gear ring 2 will apply a force to the first rotating column 41 and the first gear 42 along its rotation direction, and since the three connecting columns 311 are connected in sequence to form a triangle, the main body 1 and the bearing shell 31 are stably connected, effectively preventing the two from rotating relative to each other. The shape and size of the three connecting columns 311 can be determined according to the size of the remaining space on the end face of the main body 1 and the size of the space that needs to be reserved for wiring. Of course, in other embodiments, the number of connecting columns 311 can also be two, four, etc., which can be determined according to actual conditions and will not be repeated here.

[0040] Re-reference Figure 5-Figure 7Preferably, the main body 1 is provided with a first fixing hole 14, and the bearing shell 31 is provided with a second fixing hole 314 at a position corresponding to the first fixing hole 14, and the first fixing hole 14 is connected to the second fixing hole 314. In specific applications, the first fixing hole 14 and the second fixing hole 314 are both threaded holes, wherein the first fixing hole 14 is located between the three connecting holes 11, and the second fixing hole 314 is located between the three connecting columns 311. When the connecting column 311 is inserted into the connecting hole 11, the fixing screw can be passed through the first fixing hole 14 from the other end of the main body 1 and screwed into the second fixing hole 314, that is, the main body 1 and the bearing shell 31 are connected and fixed by the screw. It can be understood that the connecting column 311 and the connecting hole 11 prevent the main body 1 and the bearing shell 31 from rotating relative to each other, and the fixing screw connects and fixes the main body 1 and the bearing shell 31, thereby avoiding the separation of the main body 1 and the bearing shell 31 during operation.

[0041] Re-reference Figure 5-Figure 7 Preferably, the bearing shell 31 is provided with a limiting hole 313, one end of the second rotating column 51 is rotatably disposed in the limiting hole 313, an axial limiting ring 3131 is provided on the inner wall of the limiting hole 313, and a limiting groove 511 is provided at one end of the second rotating column 51 corresponding to the position of the axial limiting ring 3131, and the axial limiting ring 3131 is embedded in the limiting groove 511 to limit the axial movement of the second rotating column 51. In specific applications, since the axial limiting ring 3131 is embedded in the limiting groove 511, the second rotating column 51 can only rotate in the limiting hole 313, the limiting hole 313 prevents the second rotating column 51 from being displaced in the radial direction, and the axial limiting ring 3131 prevents the second rotating column 51 from being displaced in the axial direction. Specifically, the second rotating member 5 also includes a rotating bolt 53, which includes a column section and a nut. One end of the column section is connected to one end of the second rotating column 51, and the nut is arranged at the other end of the column section. The outer diameter of the nut is between the inner diameter of the axial limiting ring 3131 and the inner diameter of the limiting hole 313, and the limiting groove 511 is formed in the middle of the column section. In this way, one end of the second rotating column 51 can be limited in the limiting hole 313 to avoid axial and radial displacement when it rotates. At the same time, there is no need to open an additional rotating hole for the second rotating column 51 on the end face of the main body 1, saving space on the end face of the main body 1. In addition, in this embodiment, the second rotating column 51 and the rotating bolt 53 are threadedly connected, which is convenient for disassembly and installation.

[0042] Refer to Figure 8 , Figure 8It is a structural schematic diagram of a small-volume motor limiter structure with a limit plate in an embodiment. Preferably, the induction member 3 also includes a limit plate 32, and the limit plate 32 is arranged at the other end of the bearing shell 31. The other end of the first rotating column 41 and the other end of the second rotating column 51 are both rotatably arranged on the limit plate 32. In specific application, the first rotating column 41 in this embodiment includes five areas arranged in sequence, wherein the first area 411 is rotatably arranged in the rotating hole 121, the second area 412 is fixedly sleeved with a first gear 42, the third area 413 is rotatably arranged in the bearing shell 31, the fourth area 414 is fixedly sleeved with a second gear 43, and the fifth area 415 is rotatably arranged in the limit plate 32. That is to say, the two ends of the first rotating column 41 are rotatably arranged in the rotating hole 121 and the limit plate 32, respectively, so that the first rotating column 41 can only rotate without moving in the axial and radial directions, thereby improving the stability of rotation. Similarly, one end of the second rotating column 51 is limited by the axial limiting ring 3131, and the other end is limited by the limiting plate 32, so that the second rotating column 51 can only rotate without moving in the axial and radial directions, further improving the stability of the rotation. It should be particularly noted that when the ring gear 2 rotates, the connecting column 311 bears most of the force. On the one hand, it is the radial force generated by the gravity of the main body 1 itself and the winding tube. On the other hand, when the ring gear 2 rotates, it is also subjected to force in the rotation direction. In this case, it is necessary to set a longer and thicker connecting column 311, as well as a thicker main body 1 and the bearing shell 31, which is not conducive to a compact and compact design. Since both the first rotating column 41 and the second rotating column 51 have partial areas located inside the bearing shell 31, the force originally borne by the connecting column 311 can be dispersed, thereby improving the stability of the structure. At the same time, since the first rotating column 41 and the second rotating column 51 can effectively share the force of the connecting column 311, the thickness of the main body 1 and the bearing shell 31 can be further reduced, thereby reducing the overall volume and achieving a compact and compact design.

[0043] Refer to Fig. 9 and Fig.10 , Fig. 9 is a schematic structural diagram of the first rotating member in the embodiment, Fig.10It is a schematic diagram of the structure of the second rotating member in the embodiment. Preferably, the main body 1 is provided with a first wiring hole 13, and the bearing shell 31 is provided with a second wiring hole 312, and the second wiring hole 312 is connected to the first wiring hole 13. In specific application, the second wiring hole 312 and the first wiring hole 13 are used for routing the power cord. In this embodiment, the storage groove 12 is provided in a side area of ​​the end face of the main body 1, and the first wiring hole 13 is provided in the other side area of ​​the end face of the main body 1, and the connecting hole 11 and the first fixing hole 14 are both located in the middle area of ​​the end face of the main body 1. Furthermore, the induction member 3 also includes a partition plate 33, which is provided at the other end of the bearing shell 31 and separates the second gear 43 and the third gear 52 from the second wiring hole 312. By setting the partition plate 33, the second gear 43 and the third gear 52 can be separated from the second wiring hole 312, 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 on the rotating gear during work. The partition plate 33 is also used to support the circuit board 34, and the sensor is integrated on the circuit board 34.

[0044] Re-reference Fig. 9 and Fig.10 Preferably, the other end of the first rotating column 41 and the other end of the second rotating column 51 are both provided with magnets (not shown in the figure). In specific applications, the sensor in this embodiment is a Hall sensor, and the driving motor drives the roller tube to rotate, thereby driving the gear ring member 2 to achieve synchronous rotation. When the gear ring member 2 rotates, the first gear 42, the first rotating column 41 and the second gear 43 are driven to rotate through the gear ring 21, and the second gear 43 drives the third gear 52 and the third rotating column 51 to rotate synchronously, so that the magnets also rotate synchronously. The sensor senses the magnetic field changes of the magnets on the first rotating column 41 and the second rotating column 51, thereby obtaining the rotation angle information of the first rotating column 41 and the second rotating column 51 in real time, thereby obtaining the rotation number information of the second gear 43 and the third gear 52, that is, obtaining the rotation number information of the roller tube and the displacement stroke information of the curtain piece, and the circuit board 34 integrated with the sensor 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. Since the second gear 43 and the third gear 52 in this embodiment are both arranged at the other end of the carrying shell 31, and the connecting column 311 and the second fixing hole 314 are both arranged at one end of the carrying shell 31, a sufficiently large space can be reserved at the other end of the carrying shell 31 to set a third gear 52 with a larger volume and a larger number of teeth, thereby improving the accuracy of stroke control.

[0045] In summary, since the second gear and the third gear are both located at the other end of the bearing shell, they do not need to occupy the space on the end face of the main body, leaving enough space for the wiring hole, the connection of the bearing shell, etc., and in this way, a third gear with a larger volume and a larger number of teeth can be set, thereby improving the accuracy of the limiter for controlling the curtain blade stroke. At the same time, one end of the first rotating column and one end of the second rotating column are respectively limited by the rotating hole and the bearing shell, and the limiting plate limits the other end of the first rotating column and the other end of the second rotating column respectively, avoiding axial or radial displacement of the first rotating column and the second rotating column during rotation, thereby improving the stability of the rotation. In addition, since part of the first rotating column and the second rotating column are located inside the bearing shell, the force originally borne by the connecting column can be dispersed, thereby improving the stability of the structure. At the same time, since the first rotating column and the second rotating column can effectively share the force of the connecting column, the thickness of the main body and the bearing shell can be further reduced, thereby reducing the overall volume. The positions of the components of this embodiment are compact and reasonable. While ensuring a small size, a third gear with a larger size and a larger number of teeth is set, which improves space utilization and the accuracy of stroke control, allowing it to be installed in a small-diameter winding tube, broadening the application scenarios.

[0046] 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 small-volume motor limiter structure, characterized in that: include: Main body (1); A gear ring member (2), one end of which is rotatably sleeved outside the main body member (1), and the inner wall of the other end of which is provided with a gear ring (21); The induction component (3) comprises a bearing shell (31) and a sensor, wherein one end of the bearing shell (31) is connected to the end surface of the main body (1), and the sensor is arranged at the other end of the bearing shell (31); A first rotating member (4), comprising a first rotating column (41) and a first gear (42) and a second gear (43) sleeved outside the first rotating column (41), one end of the first rotating column (41) being rotatably disposed on an end surface of the main body (1), the other end of the first rotating column (41) passing through the bearing shell (31) and extending in a direction away from the bearing shell (31) and facing the sensor, the first gear (42) being meshed with the gear ring (21), and the second gear (43) being located at the other end of the bearing shell (31); as well as The second rotating member (5) comprises a second rotating column (51) and a third gear (52) sleeved on the second rotating column (51); one end of the second rotating column (51) is rotatably disposed in the bearing shell (31); the other end of the second rotating column (51) passes through the bearing shell (31) and extends in a direction away from the end surface of the main body (1) and faces the sensor; the third gear (52) is located at the other end of the bearing shell (31) and meshes with the second gear (43).

2. The small-volume motor limiter structure according to claim 1 is characterized in that: The sensing element (3) further comprises a limiting plate (32), wherein the limiting plate (32) is arranged at the other end of the supporting shell (31), and the other end of the first rotating column (41) and the other end of the second rotating column (51) are both rotatably arranged on the limiting plate (32).

3. The small-volume motor limiter structure according to claim 1 is characterized in that: At least one connecting column (311) is provided at one end of the bearing shell (31), and at least one connecting hole (11) is provided at the end surface of the main body (1) at a position corresponding to the connecting column (311), and the connecting column (311) extends into the connecting hole (11), so that the bearing shell (31) is connected to the main body (1), and one end of the bearing shell (31) is in contact with the end surface of the main body (1).

4. The small-volume motor limiter structure according to claim 1 is characterized in that: The main body (1) is provided with a receiving groove (12), one end of the first rotating column (41) and the first gear (42) are both accommodated in the receiving groove (12), one side of the receiving groove (12) is an opening, and the first gear (42) is meshed with the gear ring (21) through the opening.

5. The small-volume motor limiter structure according to claim 1 is characterized in that: The main body (1) is provided with a first wiring hole (13), the bearing shell (31) is provided with a second wiring hole (312), and the second wiring hole (312) is connected to the first wiring hole (13).

6. The small-volume motor limiter structure according to claim 5, characterized in that: The sensing element (3) further comprises a partition plate (33), wherein the partition plate (33) is arranged at the other end of the carrying shell (31) and separates the second gear (43) and the third gear (52) from the second wiring hole (312).

7. The small-volume motor limiter structure according to claim 1, characterized in that: The bearing shell (31) is provided with a limiting hole (313), one end of the second rotating column (51) is rotatably arranged in the limiting hole (313), an axial limiting ring (3131) is arranged on the inner wall of the limiting hole (313), and a limiting groove (511) is provided at one end of the second rotating column (51) corresponding to the position of the axial limiting ring (3131), and the axial limiting ring (3131) is embedded in the limiting groove (511) to limit the axial movement of the second rotating column (51).

8. The small-volume motor limiter structure according to claim 1, characterized in that: The main body (1) is provided with a first fixing hole (14), the bearing shell (31) is provided with a second fixing hole (314) at a position corresponding to the first fixing hole (14), and the first fixing hole (14) is communicated with the second fixing hole (314).

9. The small-volume motor limiter structure according to claim 1, characterized in that: The other end of the first rotating column (41) and the other end of the second rotating column (51) are both provided with magnets.

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

Images