CN219229584U

CN219229584U - Curtain driving device

Info

Publication number: CN219229584U
Application number: CN202320113738.3U
Authority: CN
Inventors: 程小科
Original assignee: Wuhan Linptech Co Ltd
Current assignee: Wuhan Linptech Co Ltd
Priority date: 2023-01-14
Filing date: 2023-01-14
Publication date: 2023-06-23
Anticipated expiration: 2033-01-14

Abstract

The utility model provides a curtain driving device, comprising: a first housing having an accommodating space therein; the second shell is fixedly connected with the first shell; the driving assembly is accommodated in the accommodating space and comprises a motor, a speed reducer and a clutch, and torque output by the motor is transmitted to the clutch after being increased by the speed reducer; the clutch is provided with an output shaft towards the second shell, an output hole in clearance fit with the output shaft is formed in the position, corresponding to the output shaft, of the second shell, and the output shaft penetrates through the output hole and outputs torque outwards. According to the curtain driving device provided by the utility model, the coaxiality of the motor, the speed reducer, the clutch and the output shaft is higher, and the operation is smoother, so that the noise in the operation process is reduced, and the service life is prolonged.

Description

Curtain driving device

Technical Field

The application relates to the technical field of intelligent home, in particular to a curtain driving device.

Background

In intelligent house age, daily necessities all become intelligent gradually, liberate people's both hands gradually, improve people's life and work's efficiency, intelligent (window) curtain also this, it has characteristics such as convenient, brief, drives the (window) curtain through the (window) curtain motor, need not manual switch (window) curtain, convenient and fast.

The curtain motor generally comprises a motor, a speed reducer and a clutch, and is externally output through the clutch, so that the radial positioning precision between parts is low due to low part machining precision, the axes of the three are offset, the coaxiality is poor, the friction force between the parts is large in the operation process, the noise is large, and the service life is short.

Disclosure of Invention

In order to solve the problems of large running noise and shorter service life of a curtain motor in the prior art, the utility model provides a curtain driving device, which comprises: a first housing having an accommodating space therein; the second shell is fixedly connected with the first shell; the driving assembly is accommodated in the accommodating space and comprises a motor, a speed reducer and a clutch, and torque output by the motor is transmitted to the clutch after being increased by the speed reducer; the driving assembly is fixedly connected to the second shell, the clutch faces the second shell, an output shaft is arranged on the second shell, an output hole in clearance fit with the output shaft is formed in the position, corresponding to the output shaft, of the second shell, and the output shaft penetrates through the output hole and outputs torque outwards.

Further, the drive assembly is flexibly connected to the first housing.

Further, the first shell is sleeved outside the driving assembly, a flexible ring is arranged between the driving assembly and the first shell, an inner ring of the flexible ring is sleeved on the driving assembly, and an outer ring of the flexible ring is abutted to the inner side of the first shell so as to realize flexible connection between the driving assembly and the first shell.

Further, the flexible ring is integrally formed by rubber, silica gel or metal foam.

Further, four connecting portions are arranged on the outer side of the speed reducer in a protruding mode, the four connecting portions are circumferentially arranged around the speed reducer, and the flexible ring is sleeved on the outer side of the connecting portions.

Further, the device also comprises a third shell fixedly connected with the first shell; the third shell is fixedly connected with a first circuit board, a second circuit board and a circuit board bracket; the first circuit board is provided with a strong current circuit, and the second circuit board is provided with a weak current circuit; the circuit board support comprises a separation plate and is arranged between the first circuit board and the second circuit board.

Further, the third shell is provided with a first clamping groove, the circuit board support is provided with a first inserting groove, one end of the first circuit board is clamped in the first clamping groove, and the other end of the first circuit board is inserted in the first inserting groove; the third shell is provided with a second clamping groove, the circuit board support is provided with a second inserting groove, one end of the second circuit board is clamped in the second clamping groove, and the other end of the second circuit board is inserted in the second inserting groove.

Further, the first shell is made of metal materials, the first shell is provided with a plurality of first threaded connecting columns, the third shell is provided with connecting columns at positions corresponding to the first threaded connecting columns, and connecting holes matched with the first threaded connecting columns are formed in the connecting columns; a grounding ring is clamped between the first threaded connecting column and the connecting upright column, and the grounding ring is electrically connected to a ground wire; and a screw passes through the connecting hole and the grounding ring and is screwed and fixed on the first threaded connecting column, so that the grounding ring is abutted with the first threaded connecting column.

Further, the first housing is configured as a channel-shaped structure with two open ends, the second housing is covered at one end of the first housing, the third housing is covered at the other end of the first housing, and the first housing, the second housing and the third housing are mutually enclosed to form a closed accommodating space, so that the driving assembly, the first circuit board and the second circuit board are accommodated in the accommodating space.

Further, the second shell is clamped with a third circuit board, and a magnetic induction module is arranged on the third circuit board and can induce magnetic field change and output corresponding electric signals; the clutch is provided with a plurality of permanent magnets towards the second shell, the permanent magnets are uniformly distributed along the circumferential direction of the clutch, and the rotation of the output shaft can drive the permanent magnets to rotate so as to generate a changed magnetic field.

The beneficial effects of the utility model at least comprise:

(1) According to the utility model, the driving assembly is fixedly connected to the second shell, and the output shaft penetrates through the output hole of the second shell, so that the radial positioning references of the driving assembly and the output shaft are both the second shell, a radial positioning size chain is shortened, the occurrence of over-positioning condition is avoided, the coaxiality of the motor, the speed reducer, the clutch and the output shaft is higher, and the operation is smoother, thereby reducing the noise in the operation process and prolonging the service life;

(2) The drive assembly adopts flexonics with first casing, and the benefit lies in: firstly, the driving component is fixedly connected to the second shell, and meanwhile, the driving component is flexibly connected to the first shell, so that the second shell plays a main supporting role, the first shell plays an auxiliary supporting role, and the problem that the supporting force is insufficient due to the fact that the driving component is supported by the second shell only is avoided; secondly, the limiting force of the flexible connection is weaker, so that the flexible connection can not interfere with the support of the second shell while playing a supporting role, and over-positioning is avoided; thirdly, the flexible connection has a vibration damping effect, the driving component vibrates greatly in the running process, and large noise is generated;

(3) According to the utility model, the strong-current circuit board (the first circuit board) and the weak-current circuit board (the second circuit board) are separated by the separation board, so that the effect of electric separation is achieved, interference between the strong-current circuit board and the weak-current circuit board is prevented, the distance between the first circuit board and the second circuit board can be more close, and the internal space of the first shell is saved;

(4) The first circuit board and the second circuit board are inserted into the circuit board support, so that the connection between the two circuit boards and the third shell is more stable, and the risk of mutual interference between the two circuit boards is further reduced.

(5) The clamping is provided with the grounding ring between connecting stand and the first threaded connection post for the grounding ring switches on with first casing, and the ground wire is connected to the grounding ring simultaneously, makes first casing ground connection, avoids the user to electrocute.

(6) The magnetic induction module can induce magnetic field change, so that rotation information of the output shaft is obtained, when a user pulls the curtain manually, the magnetic induction module induces magnetic field change, and the main control module controls the motor to drive the curtain to move towards the pulling direction of the curtain, so that intelligent control of manual-automatic smooth switching of the curtain is realized.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a perspective view of an embodiment of the present utility model;

FIG. 2 is an exploded view of an embodiment of the present utility model;

FIG. 3 is an exploded view of the drive assembly and second housing of an embodiment of the present utility model;

FIG. 4 is a partial cross-sectional view of an embodiment of the present utility model;

FIG. 5 is a cross-sectional view B-B of FIG. 4 in accordance with the present utility model;

FIG. 6 is a schematic diagram of an embodiment of the present utility model;

FIG. 7 is a schematic view of a flexible loop installation of an embodiment of the present utility model;

FIG. 8 is a schematic diagram of a drive assembly installation of an embodiment of the present utility model;

FIG. 9 is a schematic view of the clutch and second housing of an embodiment of the present utility model;

FIG. 10 is a schematic diagram of the clutch and speed reducer installation of an embodiment of the present utility model;

FIG. 11 is an exploded view of a clutch and speed reducer of an embodiment of the present utility model;

FIG. 12 is a schematic diagram of the installation of a speed reducer and motor according to an embodiment of the present utility model;

FIG. 13 is a third housing mounting schematic of an embodiment of the utility model;

FIG. 14 is a partial cross-sectional view of an embodiment of the present utility model;

FIG. 15 is a schematic view of the mounting of a first circuit board, a second circuit board, and a circuit board holder according to an embodiment of the present utility model;

FIG. 16 is a schematic view of the installation of a circuit board holder according to an embodiment of the present utility model;

FIG. 17 is a schematic block diagram of an electrical motor apparatus in an embodiment of the utility model;

FIG. 18 is a schematic block diagram of an electrical motor apparatus in another embodiment of the utility model;

FIG. 19 is a schematic circuit diagram of a motor driving circuit according to an embodiment of the utility model;

fig. 20 is a schematic block diagram of a motor apparatus in another embodiment of the utility model.

Reference numerals:

1. a first housing; 11. an accommodation space; 12. a first threaded connection post; 2. a second housing; 21. an output aperture; 22. a mounting hole; 23. a first positioning rib; 24. a second positioning groove; 26. a third circuit board; 3. a drive assembly; 31. a motor; 311. a spline shaft; 312. a connection terminal;

313. an upper left arm; 3131. a left upper arm driving circuit; 314. an upper right arm; 3141. a right upper arm driving circuit; 315. a left lower arm; 3151. a left lower arm driving circuit; 316. a right lower arm; 3161. a right lower arm driving circuit;

32. a speed reducer; 321. a speed reducer main body; 3211. a transmission hole; 3212. a key shaft; 3213. a spline hole; 322. a speed reducer housing; 3221. a fourth positioning groove; 3222. a second threaded connection post; 3224. fifth positioning ribs; 33. a clutch; 331; an output shaft; 332. a clutch housing; 3321. second positioning ribs; 3322. a key hole; 3323. a third positioning rib; 3324. fourth positioning ribs; 333. a clutch body; 3331. a flat head; 334. a leaf disk; 335. an iron plate; 336. a sleeve disk; 337. a magnetic pellet; 338. a semicircular groove; 339. a permanent magnet; 4. a flexible loop; 5. a third housing; 51. a first clamping groove; 52. a second clamping groove; 53. sixth positioning ribs; 54. an external wire; 55. connecting the upright posts; 6. a first circuit board; 61. a ground ring; 7. a second circuit board; 8. a circuit board bracket; 81. a partition plate; 82. a first inserting groove is formed; 83. a second insertion groove;

9. A motor device; 91. a control unit; 92. a power carrier communication unit; 93. a coupling unit; 931. a transformer; 932. a capacitor; 94. a motor driving circuit; 95. a rotation detection unit; 96. a step-down voltage stabilizing circuit; 97. a first voltage stabilizing circuit; 98. a second voltage stabilizing circuit; 99. a first step-down circuit; 100. a second step-down circuit; 101. a protection unit; 102. a switch interface; 103. a voltage stabilizing unit; 104. and a step-down unit.

Detailed Description

In the description of the present utility model, the terms "inner", "outer", "horizontal", "vertical", "upper", "lower", "top", "bottom", "left", "right", etc. indicate orientations or positional relationships based on those shown in the drawings, merely for convenience in describing the present utility model and do not require that the present utility model must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present specification, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the description of the present utility model, unless explicitly stated and limited otherwise, the term "coupled" and the like should be construed broadly, and may be, for example, fixedly coupled, detachably coupled, or integrally formed; may be mechanically connected, may be electrically connected or may communicate with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The technical solutions between the embodiments can be combined with each other, but must be based on the fact that those skilled in the art can realize the technical solutions, when the technical solutions are contradictory or cannot be realized, the technical solutions should be considered to be absent, and the technical solutions are not within the scope of protection claimed by the present utility model.

Referring to fig. 1-16, a window covering driving device according to the present utility model is specifically illustrated. Specifically, as shown in fig. 1 and 2, the curtain driving device includes: the first shell 1 is provided with an accommodating space 11 inside; a second housing 2 fixedly connected to the first housing 1; the driving assembly 3 is accommodated in the accommodating space 11, the driving assembly 3 comprises a motor 31, a speed reducer 32 and a clutch 33, and torque output by the motor 31 is transmitted to the clutch 33 after being increased in torque by the speed reducer 32; the driving assembly 3 is fixedly connected to the second housing 2, the clutch 33 faces the second housing 2 and is provided with an output shaft 331, the second housing 2 is provided with an output hole 21 in a corresponding position of the output shaft 331 and in clearance fit with the output shaft 331, and the output shaft 331 passes through the output hole 21 and outputs torque to the outside. The existing curtain motor fixes the driving component 3 on the first shell 1, and the output shaft 331 passes through the second shell 2, so that the radial positioning size chain between the driving component 3 and the output shaft 331 is too long, the over-positioning condition is easy to occur, the axial line of the motor 31, the speed reducer 32, the clutch 33 and the output shaft 331 is offset, the coaxiality is poor, the friction force of each part is large in the operation process, the operation is blocked, the noise is large, and the service life is short. According to the utility model, the driving assembly 3 is fixedly connected to the second shell 2, and the output shaft 331 passes through the output hole 21 of the second shell 2, so that the axial positioning references of the driving assembly 3 and the output shaft 331 are both the second shell 2, a radial positioning size chain is shortened, the situation that the driving assembly 3 is positioned radially excessively is avoided, the coaxiality of the motor 31, the speed reducer 32, the clutch 33 and the output shaft 331 is higher, the operation is smoother, and therefore, the noise in the operation process is reduced, and the service life is prolonged. And the second casing 2 is provided with mounting hole 22 (as shown in fig. 9), and curtain drive arrangement installs outside through the second casing 2, and the structure that this embodiment provided can unify drive assembly 3's location benchmark and complete machine installation benchmark, has further shortened the size chain of installation, avoids output shaft 331 to appear the condition of axis skew to outer installation, has improved drive assembly 3 moving smoothness.

Further, as shown in fig. 2 to 7, the driving assembly 3 is flexibly connected to the first housing 1. The flexible connection is understood to be a non-rigid connection, i.e. the drive assembly 3 can be supported by the first housing 1, while the drive assembly 3 has a certain mobility with respect to the first housing 1, and in some preferred embodiments the flexible connection may be by rubber abutment, or by spring support connection, or by spring abutment, or other flexible connection means that may be implemented. The advantage of using flexible connections is that: firstly, the driving component 3 is fixedly connected with the second shell 2, and is flexibly connected with the first shell 1, so that the second shell 2 plays a main supporting role, the first shell 1 plays an auxiliary supporting role, and the problem that the supporting force is insufficient due to the fact that the driving component 3 is supported by the second shell 2 only is avoided; secondly, the limiting force of the flexible connection is weaker, so that the flexible connection can not interfere with the support of the second shell 2 while playing a supporting role, and over-positioning is avoided; thirdly, the flexible connection has a vibration damping effect, the driving component 3 vibrates greatly in the running process, the driving component 3 of the existing curtain motor 31 drives the shell to vibrate together to generate larger noise, and the utility model enables a part of vibration of the driving component 3 to be absorbed by the flexible connection piece through the flexible connection mode, so that the noise is reduced.

Further, as shown in fig. 2-7, the first housing 1 is sleeved outside the driving assembly 3, a flexible ring 4 is disposed between the driving assembly 3 and the first housing 1, an inner ring of the flexible ring 4 is sleeved on the driving assembly 3, and an outer ring of the flexible ring 4 abuts against the inner side of the first housing 1, so as to realize flexible connection between the driving assembly 3 and the first housing 1. In a specific embodiment, as shown in fig. 6 and 7, the flexible ring 4 is sleeved on the outer side of the speed reducer 32 and abuts against the inner wall of the first housing 1, the four corners of the first housing 1 are provided with first threaded connection columns 12 extending inwards, and the flexible ring 4 abuts against the first threaded connection columns 12. Further, four connecting portions are convexly arranged on the outer side of the speed reducer 32, the four connecting portions are circumferentially arranged around the speed reducer 32, and the flexible ring 4 is sleeved on the outer side of the connecting portions. In a specific embodiment, the connection portions are configured as bar-shaped ribs extending toward the motor 31, and the connection portions may be uniformly distributed around the circumference of the speed reducer 32 or may be unevenly arranged. The function of the connecting portion is that the shape of the speed reducer 32 is adapted to the shape inside the first casing 1, the contact area between the flexible ring 4 and the first casing 1 is larger, and the supporting stability of the flexible ring 4 is improved.

In some embodiments, the flexible ring 4 is integrally formed with rubber, silica gel or metal foam. In other embodiments, the flexible loop 4 may be formed from other flexible materials.

Further, as shown in fig. 3-12, the motor 31, the speed reducer 32, the clutch 33 and the output shaft 331 are connected in series in a first direction, wherein the first direction is a direction in which the motor 31 points to the second housing 2, and is marked in fig. 4. The motor 31 is used for providing rotation speed and torque, and because the torque of the motor 31 is smaller, the torque required for driving the curtain is larger, and the torque needs to be increased through the speed reducer 32, preferably, the speed reducer 32 adopts a planetary gear speed reducer 32, and the speed reducer comprises a speed reducer body 321 and a speed reducer shell 322 sleeved outside the speed reducer body 321, and the structure of the speed reducer body 321 is a common planetary gear speed reducer 32 structure, which is not described in detail herein. As shown in fig. 5 and 4, the clutch 33 includes a clutch main body 333 and a clutch housing 332 sleeved outside the clutch main body 333, one end of the clutch housing 332 is fixedly connected to the second housing 2, and the other end is fixedly connected to the speed reducer housing 322. The clutch body 333 includes a leaf disc 334, an iron disc 335, a sleeve disc 336, and two magnetic beads 337, wherein the magnetic beads 337 are magnetic; the iron plate 335 is fixedly connected to the clutch housing 332, and the iron plate 335 is arranged on one side of the leaf-shaped plate 334 away from the output shaft 331, and is used for attracting the magnetic small balls 337; the leaf disc 334 is connected to the output portion of the speed reducer 32 and is rotatable with respect to the iron disc 335, and the leaf disc 334 is made of aluminum material, so that the magnetic beads 337 cannot be attracted; the sleeve disc 336 is configured as a hat-shaped structure, and is sleeved on the sides of the leaf disc 334 and the iron disc 335, the length of the leaf disc 334 is slightly smaller than the diameter of the space in the sleeve disc 336, the magnetic small balls 337 are placed in the space between the sides of the leaf disc 334 and the sleeve disc 336, and the sleeve disc 336 is made of plastic material and cannot attract the magnetic small balls 337; the inner wall of the sleeve plate 336 is provided with two semicircular grooves 338, the semicircular grooves 338 are configured in a semicircular shape, and the shape of the semicircular grooves 338 is adapted to the shape of the magnetic balls 337. When the speed reducer 32 drives the leaf disc 334 to rotate, the leaf disc 334 pushes the magnetic small balls 337 to move towards the outer edge of the iron disc 335 until the magnetic small balls 337 are clamped into the semicircular grooves 338 on the inner wall of the sleeve disc 336, the leaf disc 334 drives the sleeve disc 336 to rotate through the magnetic small balls 337, the sleeve disc 336 is connected with the output shaft 331, and the magnetic small balls 337 are output outwards through the output shaft 331. When the output shaft 331 drives the sleeve disk 336 to rotate, the leaf disk 334 is stationary, and the magnetic balls 337 are attracted by the iron disk 335 (as shown in fig. 5) and cannot be clamped into the semicircular grooves 338, so that the sleeve disk 336 cannot drive the leaf disk 334 to rotate. That is, the speed reducer 32 can drive the output shaft 331 to rotate through the clutch 33, and the output shaft 331 cannot drive the speed reducer 32 to rotate, so that the clutch function is realized. In use, a user can manually pull the window covering, and the clutch 33 can avoid the obstruction of the manual operation of the window covering by the speed reducer 32.

In a specific embodiment, as shown in fig. 2, four first threaded connection columns 12 are disposed on the inner side of the first housing 1, the first threaded connection columns 12 are communicated with the left end and the right end of the first housing 1, and are integrally formed with the first housing 1, preferably, the first housing 1 is integrally formed by adopting an aluminum profile. The second casing 2 is provided with the screw hole in the corresponding position of first screwed connection post 12 to pass the screw hole through, twist to be fixed in first screwed connection post 12 with second casing 2 is fixed in first casing 1, and further, as shown in fig. 9, second casing 2 is protruding to be equipped with four first location muscle 23 towards first casing 1, and first location muscle 23's position and first casing 1 lateral wall looks adaptation, when second casing 2 installs to first casing 1, first location muscle 23 butt in the medial surface of first casing 1, thereby radial location with first casing 1 and second casing 2, makes the positioning accuracy of first casing 1 and second casing 2 higher, and corresponding drive assembly 3 is higher for the accuracy of first casing 1 indirect location, for drive assembly 3, has improved the axiality that flexible support and second casing 2 supported, and both radial location can not appear interfering, makes drive assembly 3 move more smooth.

Further, as shown in fig. 8 and 9, the outer wall of the clutch housing 332 is provided with a second positioning rib 3321, the second housing 2 is provided with a second positioning groove 24 at a corresponding position of the second positioning rib 3321, and the second positioning rib 3321 is inserted into the second positioning groove 24 to radially position the clutch housing 332 and the second housing 2, thereby improving the radial positioning precision of the second housing 2 and the driving assembly 3, and improving the coaxiality of the driving assembly 3, the output hole 21 and the first housing 1. The end of the second positioning rib 3321 is provided with a threaded hole, and the second shell 2 is connected with the second positioning rib 3321 through a screw. Further, as shown in fig. 9 and 10, the clutch main body 333 is provided with a flat head 3331 protruding toward the speed reducer 32, the output part of the speed reducer main body 321 is provided with a transmission hole 3211 matching with the flat head 3331 toward the clutch 33, and the flat head 3331 is inserted into the transmission hole 3211 to realize transmission between the output part of the speed reducer main body 321 and the clutch main body 333. Further, as shown in fig. 10 and 11, the housing of the speed reducer body 321 is provided with a key shaft 3212 protruding toward the clutch 33, the clutch housing 332 is correspondingly provided with a key hole 3322 matched with the key shaft 3212, and the key shaft 3212 is inserted into the key hole 3322, so that the housing of the speed reducer body 321 and the clutch housing 332 are positioned normally. Further, the clutch housing 332 is provided with a third positioning rib 3323 protruding toward the speed reducer 32, and a fourth positioning rib 3324 protruding outside the third positioning rib 3323, wherein the third positioning rib 3323 abuts against the inner side wall of the speed reducer housing 322 so as to radially position the clutch housing 332 and the speed reducer housing 322; the side wall of the speed reducer housing 322 is provided with a fourth positioning groove 3221 at a position corresponding to the fourth positioning rib 3324, and the fourth positioning rib 3324 is inserted into the fourth positioning groove 3221 to enable the clutch housing 332 and the speed reducer housing 322 to be positioned normally. Further, the speed reducer housing 322 is provided with a second screw connection post 3222 toward the clutch housing 332, and the clutch housing 332 and the speed reducer housing are fixed by screws.

Further, as shown in fig. 12, 3 and 4, a circle of fifth positioning ribs 3224 is convexly arranged on the outer edge of the speed reducer housing 322 towards the motor 31, and the fifth positioning ribs 3224 are sleeved on the outer side of the motor 31, so that the speed reducer housing 322 and the motor 31 are radially positioned; one end of the motor 31 facing the speed reducer shell 322 is provided with a threaded hole, the speed reducer shell 322 facing the motor 31 is provided with a screw through hole, and the speed reducer shell 322 is fixedly connected with the motor 31 through screws. The output shaft 331 of the motor 31 is provided with a spline shaft 311, the speed reducer body 321 is correspondingly provided with a spline hole 3213, and the spline shaft 311 is inserted into the spline hole 3213 so as to transmit the torque output by the motor 31 to the speed reducer body 321. The tail end of the motor 31 is provided with a wiring terminal 312, the wiring terminal 312 is connected with the second circuit board 7 through a flat cable, the second circuit board 7 is provided with a main control module, and the main control module controls the motor 31 to rotate.

Further, as shown in fig. 2 and fig. 13 to 16, the curtain driving device further includes a third housing 5 fixedly connected to the first housing 1; the third shell 5 is fixedly connected with a first circuit board 6, a second circuit board 7 and a circuit board bracket 8; the first circuit board 6 carries a strong current circuit, and the second circuit board 7 carries a weak current circuit; the circuit board support 8 includes a spacer 81 disposed between the first circuit board 6 and the second circuit board 7. Specifically, as shown in fig. 13, the third casing 5 is convexly provided with a sixth positioning rib 53 towards the first casing 1, the sixth positioning rib 53 is circumferentially arranged along the side wall of the first casing 1, and when the third casing 5 is installed in the first casing 1, the sixth positioning rib 53 abuts against the inner wall of the first casing 1, so that the third casing 5 and the first casing 1 are radially positioned; the third housing 5 is connected to the first threaded connection post 12 of the first housing 1 by a screw so that the third housing 5 is relatively fixed to the first housing 1. The external leads 54 are electrically connected to the first circuit board 6 through the third housing 5. The utility model separates the strong current circuit board (the first circuit board 6) from the weak current circuit board (the second circuit board 7) through the separation board 81, achieves the effect of electric separation, prevents interference between the two, and simultaneously enables the distance between the first circuit board 6 and the second circuit board 7 to be more close, thereby saving the internal space of the first shell 1. Moreover, the circuit board support 8 can support the first circuit board 6 and the second circuit board 7, so that the connection between the circuit board and the third shell 5 is more stable, and the risk of mutual interference between the two circuit boards is further reduced. Further, the first circuit board 6, the isolation board 81 and the second circuit board 7 are arranged in parallel, which can further save the space occupied by the circuit board and is beneficial to reducing the volume of the first shell 1.

Further, as shown in fig. 15 and 16, the third housing 5 is provided with a first clamping groove 51, the circuit board bracket 8 is provided with a first plugging groove 82, one end of the first circuit board 6 is clamped in the first clamping groove 51, and the other end is plugged in the first plugging groove; the third housing 5 is provided with a second clamping groove 52, the circuit board support 8 is provided with a second inserting groove 83, one end of the second circuit board 7 is clamped in the second clamping groove 52, and the other end is inserted in the second inserting groove 83. So that the connection between the first circuit board 6 and the second circuit board 7 and the third housing 5 is more stable.

Further, as shown in fig. 13 and 15, the first housing 1 is made of a metal material, the first housing 1 is provided with a plurality of first threaded connection columns 12, the third housing 5 is provided with connection columns 55 at positions corresponding to the first threaded connection columns 12, and connection holes matched with the first threaded connection columns 12 are formed in the connection columns 55; a grounding ring 61 is clamped between the first threaded connection column 12 and the connection upright column 55, and the grounding ring 61 is electrically connected to the ground wire; a screw is screwed to the first threaded connection post 12 after passing through the connection hole and the grounding ring 61, so that the grounding ring 61 abuts against the first threaded connection post 12. The coupling hole is adapted to the first threaded coupling post 12, which may be understood as that a screw used for the first threaded coupling post 12 is used in cooperation with the coupling hole, so that the screw may fix the coupling hole to the first threaded coupling post 12. Because the first housing 1 is made of metal materials, the human body touches the first housing 1 and has an electric shock risk, and the grounding ring 61 is clamped between the connecting upright post 55 and the first threaded connecting post 12 in the embodiment, so that the grounding ring 61 is conducted with the first housing 1, and meanwhile, the grounding ring 61 is connected with a ground wire, so that the first housing 1 is grounded, and electric shock of a user is avoided. In a preferred embodiment, the first housing 1 is integrally formed from an aluminum profile.

Further, as shown in fig. 1-2, the first housing 1 is configured as a channel structure with two open ends, the second housing 2 is covered at one end of the first housing 1, the third housing 5 is covered at the other end of the first housing 1, and the first housing 1, the second housing 2 and the third housing 5 enclose each other to form a closed accommodating space 11, so as to accommodate the driving assembly 3, the first circuit board 6 and the second circuit board 7. Thereby improving the sealing performance and the integration of the curtain driving device and being beneficial to prolonging the service life.

Further, as shown in fig. 8 and 9, the second housing 2 is clamped with a third circuit board 26, and a magnetic induction module is disposed on the third circuit board 26, and the magnetic induction module can induce a magnetic field to change and output a corresponding electric signal; the clutch 33 is provided with a plurality of permanent magnets 339 facing the second housing 2, the plurality of permanent magnets 339 are uniformly distributed along the circumferential direction of the clutch 33, and the rotation of the output shaft 331 can drive the permanent magnets 339 to rotate so as to generate a variable magnetic field. The magnetic induction module can detect the magnetic field change and transmit the detection result to the main control module, so as to obtain the rotation information of the output shaft 331. When a user pulls the curtain manually, the magnetic induction module detects the magnetic field change, the main control module obtains the rotation information of the output shaft 331 and controls the motor 31 to drive the curtain to move towards the pulling direction of the curtain, so that intelligent control of manual-automatic smooth switching of the curtain is realized. Specifically, the sleeve disc 336 of the clutch 33 is fixedly connected with the output shaft 331, a plurality of permanent magnets 339 are arranged on one side, facing the second housing 2, of the sleeve disc 336, the permanent magnets 339 are uniformly distributed around the circumference of the sleeve disc 336, when the output shaft 331 and the sleeve disc 336 rotate, the permanent magnets 339 are driven to revolve, so that a magnetic field near the induction module periodically changes, the third circuit board 26 is connected to the second circuit board 7 through a flat cable, a main control module is arranged on the second circuit board 7, the induction module acquires magnetic field information and transmits the magnetic field information to the central control module, and the central control module acquires rotation information of the output shaft 331 according to the magnetic field information. As shown in fig. 8, a circuit board mounting position and a circuit board buckle are arranged on one side, facing the clutch 33, of the second shell 2, the circuit board mounting position is recessed in the second shell 2 and is matched with the shape of the third circuit board 26, and the third circuit board 26 is placed in the circuit board mounting position and is clamped by the circuit board buckle; the circuit board mounting position is convexly provided with a positioning column which is inserted into the third circuit board 26 to position the third circuit board 26.

Because the torque output by the motor 31 in the embodiment of the utility model is transmitted to the clutch 33 after the torque is increased by the speed reducer 32, the clutch 33 is provided with the output shaft 331 towards the second shell 2, the output shaft 331 passes through the output hole 21 of the second shell to output the torque outwards, so that the output torque of the motor 31 is transmitted layer by layer, the starting torque of the motor 31 is larger, the applicant finds that the starting instant current of the motor 31 is larger, the circuit load current is larger, and the current carrying elements with impedance in the circuit such as lines and the like are increased, so that the instant bottoming and peak of the whole power supply voltage are caused, the power supply ripple is larger, and the larger power supply ripple causes abnormal power supply of a main control chip and a driving circuit in the circuit. Thus, the present embodiment gives a corresponding solution.

As shown in fig. 17, a schematic block diagram of a specific embodiment of a motor device 9 based on power carrier communication is provided, and the embodiment of the utility model provides a curtain motor based on the power carrier communication technology, wherein the power carrier communication is to use the existing power line to mount a communication signal on 220V household alternating current and transmit the communication signal through the power line.

As shown in fig. 17, in order to solve the problem of abnormal power supply of other electronic components in the circuit caused by excessive current at the moment of starting the motor 31, the embodiment of the utility model designs a motor device 9, wherein the motor device 9 comprises a motor 31, a protection unit 101, a control unit 91, a power carrier communication unit 92, a coupling unit 93, a motor driving circuit 94 and a voltage reducing and stabilizing circuit 96. After the power supply end signal enters the motor device 9 through the protection unit 101, the received power supply signal in an alternating current form is converted into a direct current signal through a voltage reduction and stabilization circuit 96 and is reduced to be within a first limiting voltage range, so that power is supplied to an internal circuit of the motor device 9;

the step-down voltage stabilizing circuit 96 supplies power to the power carrier communication unit 92 electrically connected to the step-down voltage stabilizing circuit 96, and the power carrier communication unit 92 is electrically connected to the protection unit 101 through a coupling unit 93 to form a transmission channel of a power carrier control signal, wherein the power carrier control signal is communicated between the power carrier communication unit 92 and the control unit 91 through a serial port;

the step-down voltage stabilizing circuit 96 further supplies power to the motor driving circuit 94 and the control unit 91 electrically connected to the step-down voltage stabilizing circuit 96, and the motor driving circuit 94 is electrically connected to the control unit 91 to control the motor 31 controlled by the control unit 91 to perform corresponding rotation.

In this embodiment, the protection unit 101 includes a fuse and a varistor; the BUCK voltage stabilizing circuit 96 may be an AC-DC converter with any topology, such as flyback converter, BUCK converter, etc., and the circuit structure of the BUCK voltage stabilizing circuit is not limited in any way. The first defined voltage range is the supply voltage of the motor 31, which in this embodiment is 24V.

The step-down voltage stabilizing circuit 96 also steps down the output voltage of the first limited voltage range through a voltage stabilizing unit 103 to supply power to the motor driving circuit 94 and the control unit 91;

the step-down voltage stabilizing circuit 96 further steps down the output voltage of the first limited voltage range through a step-down unit 104 to supply power to the power carrier communication unit 92, wherein the step-down modes of the voltage stabilizing unit 103 and the step-down unit 104 are different.

As shown in fig. 18, in the present embodiment, the control unit 91 employs an MCU chip, the model of which is HC32L170, which requires a power supply voltage of 3.3V.

The voltage stabilizing unit 103 includes a first voltage stabilizing circuit 97 and a second voltage stabilizing circuit 98; the first voltage stabilizing circuit 97 reduces the first limited voltage range to the second limited voltage range to provide power for the motor drive circuit 94 and the second voltage stabilizing circuit 98; the second voltage stabilizing circuit 98 reduces the second limited voltage range to a third limited voltage range to provide power to the control unit 91; the first voltage stabilizing circuit 97 and the second voltage stabilizing circuit 98 both adopt low dropout linear voltage stabilizing circuits for voltage reduction. The step-down structure of the two-stage low-dropout linear voltage stabilizing circuit can better reduce output power supply ripple, provides rich power supply voltage, improves the stability of chip power supply in the control unit 91, avoids breakdown of MOS tubes in the motor driving circuit 94, and improves the working stability of the motor driving circuit 94.

In a specific example, the first defined voltage range is 24V, the second defined voltage range is 12V, and the third defined voltage range is 3.3V.

In this embodiment, the power carrier communication unit 92 employs a chip MHCP01G that requires power supply voltages of 3.3V and 7V, respectively.

The step-down unit 104 includes a first step-down circuit 99 and a second step-down circuit 100; the first step-down circuit 99 reduces the first limited voltage range to the fourth limited voltage range, and the second step-down circuit 100 reduces the first limited voltage range to the fifth limited voltage range, respectively, to supply power to the power carrier communication unit 92; the first voltage-reducing circuit 99 and the second voltage-reducing circuit 100 both adopt a switching power supply to reduce voltage, for example, any voltage-reducing topology structure such as BUCK topology can be adopted, and the voltage-reducing topology structure of the switching power supply is not limited in the utility model. In a specific example, the first defined voltage range is 24V, the fourth defined voltage range is 3.3V, and the fifth defined voltage range is 7V.

The step-down voltage stabilizing circuit 96 adopts two step-down circuits of the voltage stabilizing unit 103 and the step-down unit 104 to step down, and the two step-down circuits adopt different step-down modes, which are determined by the different characteristics of the control unit chip and the power carrier communication unit chip, specifically:

1. The voltage requirements of the control unit and the power carrier communication unit on the power supply are different, as in the embodiment, the control unit chip requires 3.3V power supply, the power carrier communication unit requires 3.3V power supply and 7V power supply, in addition, the motor driving circuit also requires 12V power supply, and the two-way voltage reduction structure can provide richer power supply voltage;

2. the control unit and the power carrier communication unit have different requirements on the characteristics of the power supply:

1) The control unit chip and the motor driving circuit controlled by the control unit chip have higher requirements on the stability of a power supply; the ripple wave of the whole power supply is larger at the moment of starting and stopping the load motor (in the embodiment, through testing, the ripple wave of the 24V power supply output by the voltage reduction and stabilization circuit 96 is 0.2% in the motor standby state, and the ripple wave of the 24V power supply reaches 5.8% when the motor is started, the control unit chip and the MOS tube grid electrode in the motor driving circuit are sensitive to the fluctuation of the power supply voltage, and the conditions of chip burnout and MOS tube breakdown easily occur when the power supply ripple wave is large, so that the ripple wave of the power supply needs to be restrained when the voltage is reduced, the ripple wave of the power supply can be well reduced by the arrangement of the continuous two-stage low-voltage difference linear voltage stabilization circuit, and the working stability of the control unit and the motor driving circuit is ensured;

2) The output power of the power carrier communication unit chip is higher, and then the power supply is realized by adopting a switching power supply with higher efficiency, so that the efficiency of the whole power supply system is ensured.

The motor driving circuit 94 is controlled by the control unit 91 to control the rotation of the motor 31, and feeds back motor rotation information to the control unit 91 through the rotation detecting unit 95, wherein the rotation detecting unit 95 is provided at the third circuit board 26.

Fig. 19 is a schematic circuit diagram of a motor driving circuit 94 according to an embodiment.

The motor 31 is driven by an H-bridge consisting of a left upper arm 313, a right upper arm 314, a left lower arm 315 and a right lower arm 316, and forward rotation and reverse rotation are realized. In a specific example, the upper left arm 313, the upper right arm 314, the lower left arm 315, and the lower right arm 316 are all NMOS transistors, and VDD is the output voltage of the buck regulator 96. In another specific example, the left upper arm 313 and the right upper arm 314 are respectively configured as PMOS transistors, the left lower arm 315 and the right lower arm 316 are respectively configured as NMOS transistors, and VDD is the output voltage of the buck voltage regulator 96.

Since the driving signal (typically 3.3V or 5V) of the control unit 91 is generally insufficient to directly drive the MOS transistor (the MOS transistor gate driving is typically 10V or 12V), the upper left arm driving circuit 3131, the upper right arm driving circuit 3141, the lower left arm driving circuit 3151, and the lower right arm driving circuit 3161 are respectively provided for driving the four legs of the H-bridge, respectively.

In a specific example, a transistor is disposed in each of the upper left arm driving circuit 3131, the upper right arm driving circuit 3141, the lower left arm driving circuit 3151, and the lower right arm driving circuit 3161, and VCC is the output voltage of the first voltage stabilizing circuit 97, which may be 12V. The separate VCC power supply and not VDD is adopted, because the gate of the MOS transistor in the H-bridge is sensitive to voltage fluctuation, the voltage fluctuation easily causes breakdown of the MOS transistor, and the motor 31 causes larger ripple wave of the output Voltage (VDD) of the buck voltage stabilizing circuit 96, so that in order to avoid the influence of the ripple wave on the motor driving circuit, the bridge arm driving circuit is adopted to supply power separately.

In another specific example, the control unit 91 may output two PWM control signals, one for synchronously controlling the upper left arm 313 and the lower right arm 316, and the other for synchronously controlling the upper right arm 314 and the lower left arm 315. In another specific example, the control unit 91 may output four paths of control signals PWM1, PWM2, PWM3, PWM4 for controlling the upper left arm 313, the upper right arm 314, the lower left arm 315, and the lower right arm 316, respectively, and the four paths of control modes can more flexibly adjust the duty ratios of the four MOS transistors of the H-bridge.

The rotation detecting unit 95 is configured to detect a rotation direction and a rotation speed of the motor 31, and feed the rotation direction and the rotation speed back to the control unit 91, and further adjust a duty ratio of a driving signal output from the control unit 91, thereby realizing adjustment of the rotation speed and the rotation direction of the motor 31. In a specific example, the rotation detection unit includes two hall sensors.

The power carrier communication unit 92 is electrically connected to the protection unit 101 through the coupling unit 93 to form a transmission channel of the power carrier control signal.

As shown in fig. 20, the coupling unit 93 includes a transformer 931 and a capacitor 932, wherein the coupling unit 93 is connected after the protection unit 101 to prevent the coupling unit from being damaged by the surge current.

The transformer 931 is connected in series with the capacitor 932 between the primary side of the transformer 931 and one end of the transformer 931 facing the protection unit 101, and the secondary side of the transformer 931 is directly or indirectly electrically connected with the power carrier communication unit 92, so that when the protection unit 101 is connected with a power supply signal, the capacitor 932 and the primary side of the transformer 931 can extract a power carrier control signal superimposed in the power supply signal, and the power carrier communication unit 92 is connected and demodulated in an isolated manner on the secondary side of the transformer 931, and then sent to the control unit 91 through a serial port, and further converted into control of the motor 31; similarly, when the control unit 91 needs to send a control signal to the outside, the control signal is sent to the power carrier communication unit 92 through the serial port and modulated, and then the signal to be sent is injected to the primary side of the transformer 931 in an isolated manner through the secondary side of the transformer 931, and the power carrier control signal is further superimposed to the power supply signal and sent out based on the coupling unit 93 formed by electrically connecting the primary side of the transformer 931 and the capacitor 932.

In some embodiments, the motor arrangement 9 may further comprise a switch interface 102 for controlling the start and stop of the motor 31. In a specific example, the switch interface 102 may be a dry contact interface, such as a limit switch, a travel switch, etc., which is not limited in the present utility model.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A window covering driving apparatus, comprising:

a first housing having an accommodating space therein;

the second shell is fixedly connected with the first shell;

the driving assembly is accommodated in the accommodating space and comprises a motor, a speed reducer and a clutch, and torque output by the motor is transmitted to the clutch after being increased by the speed reducer;

The driving assembly is fixedly connected to the second shell, the clutch faces the second shell, an output shaft is arranged on the second shell, an output hole in clearance fit with the output shaft is formed in the position, corresponding to the output shaft, of the second shell, and the output shaft penetrates through the output hole and outputs torque outwards.

2. A window covering driving apparatus as recited in claim 1, wherein said drive assembly is flexibly connected to said first housing.

3. A curtain driving device according to claim 2, wherein the first housing is sleeved outside the driving assembly, a flexible ring is arranged between the driving assembly and the first housing, an inner ring of the flexible ring is sleeved on the driving assembly, and an outer ring of the flexible ring abuts against the inner side of the first housing, so that flexible connection between the driving assembly and the first housing is realized.

4. A window covering driving apparatus according to claim 3, wherein the flexible ring is integrally formed of rubber, silicone or metal foam.

5. A curtain driving device according to claim 3, wherein four connecting portions are provided on the outer side of the speed reducer in a protruding manner, the four connecting portions are circumferentially arranged around the speed reducer, and the flexible sleeve is sleeved on the outer side of the connecting portions.

6. A window covering driving apparatus according to claim 1, further comprising a third housing fixedly connected to the first housing; the third shell is fixedly connected with a first circuit board, a second circuit board and a circuit board bracket; the first circuit board is provided with a strong current circuit, and the second circuit board is provided with a weak current circuit;

the circuit board support comprises a separation plate and is arranged between the first circuit board and the second circuit board.

7. The window curtain driving device according to claim 6, wherein the third housing is provided with a first clamping groove, the circuit board bracket is provided with a first inserting groove, one end of the first circuit board is clamped in the first clamping groove, and the other end of the first circuit board is inserted in the first inserting groove;

the third shell is provided with a second clamping groove, the circuit board support is provided with a second inserting groove, one end of the second circuit board is clamped in the second clamping groove, and the other end of the second circuit board is inserted in the second inserting groove.

8. The window curtain driving device according to claim 6, wherein the first housing is made of a metal material, the first housing is provided with a plurality of first threaded connection columns, the third housing is provided with connection columns at positions corresponding to the first threaded connection columns, and connection holes matched with the first threaded connection columns are formed in the connection columns;

A grounding ring is clamped between the first threaded connecting column and the connecting upright column, and the grounding ring is electrically connected to a ground wire; and a screw passes through the connecting hole and the grounding ring and is screwed and fixed on the first threaded connecting column, so that the grounding ring is abutted with the first threaded connecting column.

9. The window shade driving device according to claim 8, wherein the first housing is configured as a channel structure with two open ends, the second housing is covered at one end of the first housing, the third housing is covered at the other end of the first housing, and the first housing, the second housing and the third housing enclose each other to form a closed accommodating space, so that the driving assembly, the first circuit board and the second circuit board are accommodated.

10. The window shade driving device according to any one of claims 1-9, wherein the second housing is connected to a third circuit board in a clamping manner, and a magnetic induction module is disposed on the third circuit board, and the magnetic induction module can induce a magnetic field to change and output a corresponding electric signal;

the clutch is provided with a plurality of permanent magnets towards the second shell, the permanent magnets are uniformly distributed along the circumferential direction of the clutch, and the rotation of the output shaft can drive the permanent magnets to rotate so as to generate a changed magnetic field.