Self-locking speed reducer and self-locking roller shutter

Abstract

The self-locking speed reducer comprises a worm, a self-locking mechanism and a planetary transmission mechanism, the self-locking mechanism is in transmission connection with the worm, the planetary transmission mechanism comprises a primary planetary transmission mechanism and a secondary planetary transmission mechanism, the primary planetary transmission mechanism is in transmission connection with the self-locking mechanism, the secondary planetary transmission mechanism is in transmission connection with the self-locking mechanism, and the secondary planetary transmission mechanism is in transmission connection with the self-locking mechanism. The first-stage planetary transmission mechanism is driven by the second-stage planetary transmission mechanism to rotate, and the first-stage planetary transmission mechanism is in transmission connection with the second-stage planetary transmission mechanism. The self-locking mechanism is in transmission connection with the first-stage planetary transmission mechanism to prevent the first-stage planetary transmission mechanism from being driven by the second-stage planetary transmission mechanism to rotate, when the self-locking and hovering device is applied to the fields such as roller shutters needing self-locking and hovering functions, the planetary transmission mechanisms can be prevented from rotating under the non-driving condition, and the technical effect of hovering and locking is provided for the roller shutters.

Description

Technical Field

[0001] The utility model relates to the technical field of reducers, in particular to a self-locking reducer and a self-locking rolling curtain. Background Art

[0002] With the promotion and popularization of smart homes, more and more smart homes are approaching daily life. Automation is a key function of smart homes. A large part of smart homes cannot be separated from the use of reducers, especially in the field of rolling blinds. In the prior art, there is a micro reducer motor (CN206313604U) suitable for the field of rolling blinds. Its output shaft is coaxial with the motor and can be installed coaxially with the rotating shaft of the rolling blind. It is easy to install and the integrity of the rolling blind is high. However, it does not have self-locking performance. When used in the field of rolling blinds, the rolling blind cannot be suspended during the winding process. Therefore, there are still many inconveniences in specific applications. Utility Model Content

[0003] In order to overcome at least one of the defects of the prior art described above, the utility model provides a self-locking reducer and a self-locking roller shutter, which can solve the problem that the reducer does not have a self-locking function.

[0004] The technical solution adopted by the utility model to solve the problem is:

[0005] A self-locking reducer, comprising:

[0006] Worm;

[0007] A self-locking mechanism, the self-locking mechanism is connected to the worm gear transmission;

[0008] A planetary transmission mechanism, wherein the planetary transmission mechanism comprises a primary planetary transmission mechanism and a secondary planetary transmission mechanism, wherein the secondary planetary transmission mechanism is transmission-connected with the self-locking mechanism via the primary planetary transmission mechanism to achieve self-locking of the secondary planetary transmission mechanism;

[0009] The output shaft of the two-stage planetary transmission mechanism is the output end of the self-locking reducer.

[0010] By adopting the above scheme, a worm is used as the power input shaft to provide a more stable power input, and the self-locking mechanism limits the rotation of the first-stage planetary transmission mechanism, thereby limiting the rotation of the second-stage planetary transmission mechanism. When used in fields such as roller blinds that require a self-locking hovering function, the planetary transmission mechanism can be prevented from rotating in a non-driven state, thereby providing the roller blind with a hovering locking technical effect; in addition, the first-stage planetary transmission mechanism is combined with the second-stage planetary transmission mechanism, so that the output of the self-locking reducer is further reduced and smoother.

[0011] Further, the self-locking mechanism includes a first gear and a second gear, the first gear includes a first tooth segment and a second tooth segment, the second gear includes a third tooth segment and a fourth tooth segment, the first tooth segment is vertically meshed with the worm so that the rotation axis of the first gear is perpendicular to the rotation axis of the worm, the second tooth segment is vertically meshed with the third tooth segment so that the rotation axis of the second gear is perpendicular to the rotation axis of the first gear, and the first-stage planetary transmission mechanism is transmission connected to the fourth tooth segment.

[0012] By adopting the above solution, the worm and the first gear are vertically matched, and the first gear and the second gear are vertically matched, so that a strong self-locking performance is achieved.

[0013] Furthermore, the self-locking mechanism includes a third gear, the third gear includes a fifth tooth segment and a sixth tooth segment, the fourth tooth segment is meshed in parallel with the third gear, the axis of the worm and the axis of the third gear are located on the same straight line, and the first-stage planetary transmission mechanism is transmission connected to the sixth tooth segment.

[0014] By adopting the above scheme, the worm and the first gear are vertically matched, and the first gear and the second gear are vertically matched, so that it has a strong self-locking performance. More importantly, the axis of the third gear and the axis of the worm are kept on the same straight line, thereby achieving coaxial output of the worm and the third gear, thereby facilitating the installation of the self-locking reducer.

[0015] Furthermore, the first-stage planetary transmission mechanism includes a first-stage sun gear, a first-stage planetary gear, a first-stage planetary carrier and a first-stage ring gear, the output end of the self-locking mechanism serves as the first-stage sun gear meshing with the first-stage planetary gear, the first-stage planetary gear meshing with the first-stage ring gear, the first-stage planetary gear is connected to a first-stage planetary shaft, the first-stage planetary carrier is provided with a first transmission hole for mounting the first-stage planetary shaft, one end of the first-stage planetary shaft is mounted in the first transmission hole so that the first-stage planetary shaft can drive the first-stage planetary carrier to rotate, and the first-stage planetary carrier is transmission-connected to the second-stage planetary transmission mechanism.

[0016] Furthermore, the primary planet carrier includes an output turntable, the secondary planetary transmission mechanism includes a secondary sun gear, the secondary sun gear is fixedly connected to the output turntable, and the first transmission hole is provided in the output turntable.

[0017] Furthermore, the secondary planetary transmission mechanism also includes a secondary sun gear, secondary planetary gears, a secondary planetary carrier and a secondary ring gear. The output end of the primary planetary transmission mechanism serves as the secondary sun gear meshing with the secondary planetary gears, the secondary planetary gears meshing with the secondary ring gear, the secondary planetary gears are connected to a secondary planetary shaft, the secondary planetary carrier is provided with a second transmission hole for mounting the secondary planetary shaft, one end of the secondary planetary shaft is mounted in the second transmission hole so that the secondary planetary shaft can drive the secondary planetary carrier to rotate, and the secondary planetary carrier output shaft is the output end of the self-locking reducer.

[0018] Furthermore, it also includes a shell, which includes a mounting cap, a ring gear housing and a mounting seat that are sequentially snap-connected from top to bottom, the worm and the self-locking mechanism are arranged in the mounting seat, the primary planetary transmission mechanism and the secondary planetary transmission mechanism are arranged in the ring gear housing, the inner wall of the ring gear housing is provided with teeth that respectively match the primary planetary transmission mechanism and the secondary planetary transmission mechanism, and the output shaft of the secondary planetary transmission mechanism extends out of the mounting cap.

[0019] By adopting the above solution, the housing provides an installation cavity for the worm, self-locking mechanism and planetary transmission mechanism, and teeth are arranged on the inner wall of the gear ring housing, which is equivalent to forming the primary gear ring and the secondary gear ring in one piece, thereby facilitating the assembly of the planetary transmission mechanism.

[0020] Furthermore, a limiting piece is provided on the mounting cap, and the limiting piece is clamped and connected to the ring gear housing to limit the rotation of the ring gear housing.

[0021] By adopting the above solution, the ring gear housing is limited by a limiting member, so that the ring gear housing of the self-locking reducer remains in a fixed state during the transmission process.

[0022] Furthermore, N first gears are provided, and all the first gears are evenly distributed along the circumference of the worm, and N second gears are provided correspondingly, and each second gear is meshed with the corresponding first gear.

[0023] By adopting the above solution, the load balancing performance at the first gear and the second gear is improved, thereby improving the stability of the self-locking reducer.

[0024] The utility model also provides a self-locking rolling curtain, comprising a motor and the above-mentioned self-locking reducer, wherein the output shaft of the motor is coaxially connected with the worm.

[0025] In summary, the self-locking reducer and self-locking roller shutter provided by the utility model have the following technical effects:

[0026] The self-locking mechanism is connected to the primary planetary transmission mechanism to prevent the primary planetary transmission mechanism from being driven by the secondary planetary transmission mechanism to rotate. When used in fields such as roller blinds that require self-locking and hovering functions, it can prevent the planetary transmission mechanism from rotating in a non-driven state, providing the roller blind with a technical effect of hovering locking. In addition, the primary planetary transmission mechanism is combined with the secondary planetary transmission mechanism to further slow down the output of the self-locking reducer and make it smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the explosion structure of the utility model;

[0028] Figure 2 It is a partial structural schematic diagram of the utility model;

[0029] Figure 3 It is a side view of the utility model;

[0030] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model;

[0031] Figure 5 It is a schematic diagram of the partial explosion structure of the utility model;

[0032] Figure 6 It is a schematic diagram of the structure of the meshing state of the worm, the first gear and the second gear of the utility model.

[0033] Among them, the meanings of the figure marks are as follows: 1. worm; 2. first gear; 21. first tooth segment; 22. second tooth segment; 3. second gear; 31. third tooth segment; 32. fourth tooth segment; 4. third gear; 41. fifth tooth segment; 42. sixth tooth segment; 51. primary planetary gear; 511. primary planetary shaft; 521. output turntable; 522. secondary sun gear; 523. first transmission hole; 61. secondary planetary gear; 611. secondary planetary shaft; 62. secondary planetary carrier; 621. second transmission hole; 7. housing; 71. mounting cap; 711. limit member; 72. ring gear housing; 73. mounting seat; 8. motor. DETAILED DESCRIPTION

[0034] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described and discussed below in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all the examples. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] In order to facilitate the understanding of the embodiments of the present utility model, the following will be further explained by taking specific embodiments as examples in conjunction with the drawings, and each embodiment does not constitute a limitation on the embodiments of the present utility model.

[0036] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0038] Reference Figure 1-Figure 3 The utility model discloses a self-locking reducer, including a worm 1, a self-locking mechanism and a planetary transmission mechanism. The self-locking mechanism is connected to the worm 1, and the planetary transmission mechanism includes a primary planetary transmission mechanism and a secondary planetary transmission mechanism. The secondary planetary transmission mechanism is connected to the self-locking mechanism through the primary planetary transmission mechanism to realize the self-locking of the secondary planetary transmission mechanism. The output shaft of the secondary planetary transmission mechanism is the output end of the self-locking reducer.

[0039] Specifically, the worm 1 serves as the input shaft of the self-locking reducer, which is connected to the driver such as the motor 8 to provide a relatively stable power input. The self-locking mechanism is respectively connected to the worm 1 and the primary planetary transmission mechanism. On the one hand, the power input by the worm 1 is transmitted to the primary planetary transmission mechanism. On the other hand, the secondary planetary transmission mechanism is connected to the self-locking mechanism through the primary planetary transmission mechanism to achieve the self-locking of the secondary planetary transmission mechanism. For example, the self-locking reducer is connected to the reel of the rolling curtain. When the driver stops rotating to suspend the curtain, the self-locking reducer will not be driven by the gravity of the curtain to rotate, resulting in the curtain being unable to maintain a suspended state. In addition, the self-locking mechanism is set between the worm 1 and the primary planetary transmission mechanism, which is lower in cost and better in effect than the motor 8 with higher self-locking performance.

[0040] During the transmission process, the driver drives the worm 1 to rotate, the worm 1 drives the self-locking mechanism to rotate, the self-locking mechanism drives the primary planetary transmission mechanism to rotate, the primary planetary transmission mechanism drives the secondary planetary transmission mechanism to rotate, and the output is performed through the secondary planetary transmission mechanism.

[0041] Reference Figure 1-Figure 2As shown, in some embodiments, the self-locking mechanism includes a first gear 2 and a second gear 3, the first gear 2 includes a first tooth segment 21 and a second tooth segment 22, the second gear 3 includes a third tooth segment 31 and a fourth tooth segment 32, the first tooth segment 21 is vertically meshed with the worm 1 so that the rotation axis of the first gear 2 is perpendicular to the rotation axis of the worm 1, the second tooth segment 22 is vertically meshed with the third tooth segment 31 so that the rotation axis of the second gear 3 is perpendicular to the rotation axis of the first gear 2, and the first-stage planetary transmission mechanism is transmission-connected to the fourth tooth segment 32.

[0042] Specifically, the first tooth segment 21 of the first gear 2 is vertically meshed with the worm 1, that is, the axis of the first gear 2 is perpendicular to the axis of the worm 1. This level of transmission enables the self-locking mechanism to have a certain self-locking performance. The second tooth segment 22 of the first gear 2 is vertically meshed with the third tooth segment 31 of the second gear 3, that is, the axis of the first gear 2 is perpendicular to the axis of the second gear 3. This level of transmission further enhances the self-locking performance of the self-locking mechanism, so that the entire self-locking mechanism has a higher self-locking guarantee. Afterwards, the transmission connection structure between the fourth tooth segment 32 and the primary planetary transmission mechanism can be set according to specific needs. The fourth tooth segment 32 can be used as the sun tooth of the primary planetary transmission mechanism and connected to the primary planetary transmission mechanism. The fourth tooth segment 32 can also be connected to other gears or transmission shafts to cooperate with the primary planetary transmission mechanism.

[0043] When other gears or transmission shafts are used to cooperate with the primary planetary transmission mechanism, on the basis of the above structure, the self-locking mechanism also includes a third gear 4, the second gear 3 includes a third tooth segment 31 and a fourth tooth segment 32, the second tooth segment 22 is vertically meshed with the third tooth segment 31, so that the rotation axis of the first gear 2 is perpendicular to the rotation axis of the second gear 3, the fourth tooth segment 32 is parallelly meshed with the third gear 4, the axis of the worm 1 and the axis of the third gear 4 are located on the same straight line, and the primary planetary transmission mechanism is transmission-connected with the third gear 4. The worm 1 is vertically matched with the first gear 2, and the first gear 2 is vertically matched with the second gear 3, so that it has a strong self-locking performance, the axis of the third gear 4 and the axis of the worm 1 are located on the same straight line, and when the self-locking reducer is installed on the rotating shaft of the driven device, such as the roller of the roller blind, the roller, the worm 1, and the third gear 4 are coaxially driven, thereby facilitating the installation of the self-locking reducer, and the third gear 4 is transmission-connected with the primary planetary transmission mechanism to transmit power to the primary planetary transmission mechanism and the secondary planetary transmission mechanism transmission-connected with the primary planetary transmission mechanism. As the optimal implementation method, the reel, worm 1, third gear 4, primary planetary transmission mechanism and secondary planetary transmission mechanism are coaxially arranged so that the above structures can be installed in the same cylindrical cavity. The above structures are centrally arranged to facilitate the installation of the self-locking reducer.

[0044] Reference Figure 1As shown, in this embodiment, the primary planetary transmission mechanism includes a primary planetary gear 51, a primary planetary carrier and a primary gear ring, the third gear 4 includes a fifth tooth segment 41 and a sixth tooth segment 42, the fifth tooth segment 41 is meshed with the fourth tooth segment 32 in parallel, the sixth tooth segment 42 is meshed with the primary planetary gear 51 as a primary sun gear, the primary planetary gear 51 is meshed with the primary gear ring, the primary planetary gear 51 is connected with a primary planetary shaft 511, the primary planetary carrier is provided with a first transmission hole 523 for assembling the primary planetary shaft 511, one end of the primary planetary shaft 511 is assembled in the first transmission hole 523, so that the primary planetary shaft 511 can drive the primary planetary carrier to rotate, and the primary planetary carrier is connected to the secondary planetary transmission mechanism. The sixth tooth segment 42 of the third gear 4 is used as the primary sun gear of the primary planetary transmission mechanism, so that the primary planetary transmission mechanism and the third gear 4 are coaxially matched, and then the shape of the finished self-locking reducer can be set to be cylindrical, and it is coaxially arranged with the rolling shaft of the roller blind, which greatly saves the installation space. The number of the first-stage planetary gears 51 can be selected as required. In the present embodiment, three first-stage planetary gears 51 are provided.

[0045] During the transmission process, the sixth tooth segment 42 drives the first-stage planetary gear 51 to revolve around the sixth tooth segment 42 along the first-stage gear ring, and the first-stage planetary shaft 511 moves with the revolution of the first-stage planetary gear 51, thereby driving the first-stage planetary carrier to rotate, and the first-stage planetary carrier then drives the second-stage planetary transmission mechanism to move, and the second-stage planetary transmission mechanism outputs power.

[0046] Reference Figure 1 and Figure 4 As shown, in order to further design the planetary transmission mechanism in a compact manner, the primary planetary carrier includes an output turntable 521, and the secondary planetary transmission mechanism includes a secondary sun gear 522, the secondary sun gear 522 is fixedly connected to the output turntable 521, and the first transmission hole 523 is provided on the output turntable 521. In this embodiment, the secondary sun gear 522 and the output turntable 521 are integrally formed as well as the planetary carrier, so that the production and installation of the primary planetary carrier are convenient, and the transmission error at the primary planetary carrier is reduced. Of course, the secondary sun gear 522 and the output turntable 521 can also be connected by other connection methods according to needs, and the secondary sun gear 522 can be driven to rotate by the output turntable 521.

[0047] Further, refer to Figure 1 and Figure 4As shown, on the basis of the above structure, the secondary planetary transmission mechanism includes a secondary planetary gear 61, a secondary sun gear 522, a secondary planet carrier 62 and a secondary ring gear. The output end of the primary planetary transmission mechanism serves as a secondary sun gear (it should be noted that the secondary sun gear here can refer to the output end of the primary planetary transmission mechanism in any setting. Of course, it can also be the secondary sun gear 522 integrally formed with the primary planet carrier as described in the full specification) and is meshed and connected with the secondary planetary gear 61. In this embodiment, the secondary sun gear 522 is meshed with the secondary planetary gear 61, and the secondary planetary gear 61 is meshed with the secondary ring gear. The secondary planetary gear 61 is connected to a secondary planetary shaft 611, and the secondary planet carrier 62 is provided with a second transmission hole 621 for assembling the secondary planetary shaft 611. One end of the secondary planetary shaft 611 is assembled in the second transmission hole 621, so that the secondary planetary shaft 611 can drive the secondary planet carrier 62 to rotate. The specific transmission process of the secondary planetary transmission mechanism is that the secondary sun gear 522 drives the secondary planetary gear 61 to roll along the secondary gear ring. The movement of the secondary planetary gear 61 drives the secondary planetary shaft 611 to move. The secondary planetary shaft 611 drives the secondary planetary carrier 62 to rotate to achieve power output.

[0048] Reference Figure 1 and Figure 3 As shown, in order to facilitate the assembly of the planetary transmission mechanism, the self-locking reducer also includes a housing 7, which includes a mounting cap 71, a ring gear housing 72 and a mounting seat 73 that are sequentially snap-connected from top to bottom, the worm 1 and the self-locking mechanism are arranged in the mounting seat 73, the primary planetary transmission mechanism and the secondary planetary transmission mechanism are arranged in the ring gear housing 72, the inner wall of the ring gear housing 72 is provided with teeth that respectively match the primary planetary transmission mechanism and the secondary planetary transmission mechanism, the ring gear housing 72 and the inner wall of the ring gear housing 72 are provided with teeth that match the primary planetary transmission mechanism to form a primary ring gear, the ring gear housing 72 and the inner wall of the ring gear housing 72 are provided with teeth that match the secondary planetary transmission mechanism to form a secondary ring gear, and the output shaft of the secondary planetary transmission mechanism extends out of the mounting cap 71. In this embodiment, the output shaft is the secondary planetary carrier 62.

[0049] In this embodiment, the worm 1, the first gear 2 and the second gear 3 are assembled in the mounting seat 73, the fifth tooth segment 41 of the third gear 4 is located in the mounting seat 73, and the sixth tooth segment 42 is located in the ring gear housing 72. In addition to the sixth tooth segment 42, the ring gear housing 72 is also used to assemble the primary planetary gear 51, the primary planetary shaft 511, the primary planetary carrier, the secondary sun gear 522, the secondary planetary gear 61, the secondary planetary shaft 611 and part of the secondary planetary carrier 62. Specifically, a part of the secondary planetary carrier 62 is arranged in the ring gear housing 72 and is connected to the secondary planetary shaft 611, and the other part passes through the mounting cap 71 and is connected to the external reel and other transmission components for power output. The above structure is equivalent to the primary ring gear and the secondary ring gear being integrally formed by setting the ring gear housing 72 corresponding to the teeth of the primary planetary gear 51 and the secondary planetary gear 61, which greatly facilitates the assembly of the planetary transmission mechanism.

[0050] Reference Figure 1 , Figure 2 and Figure 5 As shown, in order to facilitate the assembly of the self-locking reducer, a limiting member 711 is provided on the mounting cap 71 , and the limiting member 711 is snap-connected with the ring gear housing 72 to limit the rotation of the ring gear housing 72 .

[0051] Specifically, the limiting member 711 is a toothed disc, and the teeth on the outer edge of the toothed disc mesh with the teeth on the inner wall of the gear ring housing 72 to achieve a clamping connection between the mounting cap 71 and the gear ring housing 72. In a specific implementation, the mounting cap 71 provided with the limiting member 711 will be fixed to the external mounting tube, thereby achieving the effect of limiting the rotation of the gear ring housing 72. Of course, the mounting cap 71 can also be fixed to other external components to achieve the effect of limiting the rotation of the mounting cap 71.

[0052] Reference Figure 1 As shown, in some embodiments, N first gears 2 are provided, and all first gears 2 are evenly arranged along the circumference of the worm 1, and N second gears 3 are provided correspondingly, and each second gear 3 is arranged in mesh with the corresponding first gear 2, wherein N≥2, N first gears 2 are evenly arranged along the circumference of the worm 1, and N second gears 3 are provided correspondingly, and each second gear 3 is arranged in mesh with each corresponding first gear 2, and the fifth tooth segment 41 of the third gear 4 is meshed with the fourth tooth segment 32 of all second gears 3. N first gears 2 and N second gears 3 are provided to evenly bear the load, improve the stability of the self-locking reducer, reduce the noise in the transmission process, and avoid the occurrence of safety accidents due to gear fatigue causing the clutch and the braking force of the motor 8 to lose self-position under high-frequency operation.

[0053] Reference Figure 1 and Figure 6As shown, in this embodiment, two first gears 2 are provided, and correspondingly, two second gears 3 are provided, and the first gears 2 and the second gears 3 are arranged around the worm 1 in a cross shape.

[0054] The utility model also provides a self-locking roller shutter, including a motor 8 and the above-mentioned self-locking reducer. The output shaft of the motor 8 is coaxially connected with the worm 1 to achieve coaxial transmission of the motor 8, the worm 1, the third gear 4, the primary planetary transmission mechanism and the secondary planetary transmission mechanism, and further can achieve coaxial installation of the secondary planetary carrier 62 and the winding shaft of the self-locking roller shutter, which greatly saves the installation space of the self-locking reducer and improves the integrity of the self-locking roller shutter.

[0055] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A self-locking reducer, characterized in that: include: Worm; A self-locking mechanism, the self-locking mechanism is connected to the worm gear transmission; A planetary transmission mechanism, wherein the planetary transmission mechanism comprises a primary planetary transmission mechanism and a secondary planetary transmission mechanism, wherein the secondary planetary transmission mechanism is transmission-connected with the self-locking mechanism via the primary planetary transmission mechanism to achieve self-locking of the secondary planetary transmission mechanism; The output shaft of the two-stage planetary transmission mechanism is the output end of the self-locking reducer.

2. A self-locking reducer according to claim 1, characterized in that: The self-locking mechanism includes a first gear and a second gear, the first gear includes a first tooth segment and a second tooth segment, the second gear includes a third tooth segment and a fourth tooth segment, the first tooth segment is vertically meshed with the worm so that the rotation axis of the first gear is perpendicular to the rotation axis of the worm, the second tooth segment is vertically meshed with the third tooth segment so that the rotation axis of the second gear is perpendicular to the rotation axis of the first gear, and the first-stage planetary transmission mechanism is transmission connected to the fourth tooth segment.

3. A self-locking reducer according to claim 2, characterized in that: The self-locking mechanism includes a third gear, the third gear includes a fifth tooth segment and a sixth tooth segment, the fourth tooth segment is parallelly meshed with the third gear, the axis of the worm and the axis of the third gear are located on the same straight line, and the first-stage planetary transmission mechanism is transmission connected to the sixth tooth segment.

4. A self-locking reducer according to any one of claims 1 to 3, characterized in that: The first-stage planetary transmission mechanism includes a first-stage sun gear, a first-stage planetary gear, a first-stage planetary carrier and a first-stage ring gear. The output end of the self-locking mechanism serves as the first-stage sun gear meshing with the first-stage planetary gear, the first-stage planetary gear meshing with the first-stage ring gear, the first-stage planetary gear is connected to a first-stage planetary shaft, the first-stage planetary carrier is provided with a first transmission hole for mounting the first-stage planetary shaft, one end of the first-stage planetary shaft is mounted in the first transmission hole so that the first-stage planetary shaft can drive the first-stage planetary carrier to rotate, and the first-stage planetary carrier is transmission-connected to the second-stage planetary transmission mechanism.

5. A self-locking reducer according to claim 4, characterized in that: The primary planet carrier includes an output turntable, the secondary planetary transmission mechanism includes a secondary sun gear, the secondary sun gear is fixedly connected to the output turntable, and the first transmission hole is provided in the output turntable.

6. A self-locking reducer according to any one of claims 1 to 3, characterized in that: The secondary planetary transmission mechanism also includes a secondary sun gear, secondary planetary gears, a secondary planet carrier and a secondary ring gear. The output end of the primary planetary transmission mechanism is the secondary sun gear that meshes with the secondary planetary gears, the secondary planetary gears are meshed with the secondary ring gear, the secondary planetary gears are connected to a secondary planetary shaft, the secondary planet carrier is provided with a second transmission hole for mounting the secondary planetary shaft, one end of the secondary planetary shaft is mounted in the second transmission hole so that the secondary planetary shaft can drive the secondary planet carrier to rotate, and the secondary planet carrier output shaft is the output end of the self-locking reducer.

7. A self-locking reducer according to any one of claims 1 to 3, characterized in that: It also includes a shell, which includes a mounting cap, a ring gear housing and a mounting seat that are sequentially snap-connected from top to bottom, the worm and the self-locking mechanism are arranged in the mounting seat, the primary planetary transmission mechanism and the secondary planetary transmission mechanism are arranged in the ring gear housing, the inner wall of the ring gear housing is provided with teeth that respectively match the primary planetary transmission mechanism and the secondary planetary transmission mechanism, and the output shaft of the secondary planetary transmission mechanism extends out of the mounting cap.

8. A self-locking reducer according to claim 7, characterized in that: The mounting cap is provided with a limiting piece, and the limiting piece is clamped and connected with the ring gear housing to limit the rotation of the ring gear housing.

9. A self-locking reducer according to claim 2, characterized in that: There are N first gears, all of which are evenly distributed along the circumference of the worm, and there are N second gears correspondingly, and each of the second gears is meshed with the corresponding first gear.

10. A self-locking roller blind, characterized in that: It comprises a motor and a self-locking reducer as claimed in any one of claims 1 to 9, wherein the output shaft of the motor is coaxially connected to the worm.

Images