Driving assembly and electric roller shutter

Abstract

The utility model provides a driving assembly, which comprises a driven wheel, a driving wheel and a driving wheel, the driving mechanism is used for driving the driven wheel to rotate; the driving mechanism comprises a driving motor, an output shaft and a transmission assembly, the transmission assembly is connected between the driving motor and the output shaft, and the output shaft is connected with the driven wheel; the output shaft has a first state and a second state; when the output shaft is in the first state, the output shaft is coupled with the driven wheel and the transmission assembly, so that the output shaft is in transmission connection with the driven wheel and the transmission assembly; when the output shaft is in the second state, the output shaft is decoupled from the driven wheel and / or the transmission assembly, so that the output shaft is not in transmission with the driven wheel and / or the transmission assembly; the clutch component is connected with the output shaft; the output shaft can be in a first state or a second state by operating the clutch component. The utility model further provides an electric roller shutter.

Description

Technical Field

[0001] The utility model relates to the technical field of household products, in particular to a driving component and an electric rolling curtain. Background Art

[0002] Electric roller blinds have become an important part of smart homes, which can bring better smart experience to families. Electric roller blinds generally use electric drive systems to control the up and down movement of roller blinds, that is, the motor drives the driven sprocket to rotate, and the rotation of the driven sprocket drives the movement of the bead rope, thereby realizing the up and down movement of the roller blinds.

[0003] The current electric roller blinds generally only have an electric drive function, that is, the roller blinds can only be driven up and down by a motor. In some cases, such as when the electric drive system fails, the electric drive system loses power, or the user needs the roller blind to rise and fall faster, the electric roller blinds cannot meet the needs. If the user wants to manually pull the bead rope to move at this time, the bead rope needs to drive the gears and motors inside the electric drive system to move together. This process requires a very large pulling force to be applied to the bead rope, which not only has a poor user experience, but may also cause damage to the electric drive system. Utility Model Content

[0004] The purpose of the utility model is to provide a driving assembly, which can realize the free switching between motor-driven rolling curtain and manually-driven rolling curtain, and when the rolling curtain is manually driven, there is no need to drive the driving motor and the transmission assembly to move synchronously, which can not only easily realize the manual driving of the rolling curtain, saving time and effort, but also will not cause damage to the driving mechanism.

[0005] The utility model provides a driving component, comprising:

[0006] A driven wheel, used to connect the pull rope;

[0007] A driving mechanism, for driving the driven wheel to rotate; the driving mechanism comprises a driving motor, an output shaft and a transmission assembly, the transmission assembly is connected between the driving motor and the output shaft, and the output shaft is connected to the driven wheel; the output shaft has a first state and a second state; when the output shaft is in the first state, the output shaft is coupled with the driven wheel and the transmission assembly respectively, so that the output shaft is respectively connected to the driven wheel and the transmission assembly in a transmission manner; when the output shaft is in the second state, the output shaft is decoupled from the driven wheel and / or the transmission assembly, so that no transmission is performed between the output shaft and the driven wheel and / or the transmission assembly;

[0008] A clutch component is connected to the output shaft; the output shaft can be placed in a first state or a second state by operating the clutch component.

[0009] In one achievable manner, the transmission assembly includes an output gear, the output gear is in transmission connection with the drive shaft of the drive motor, and the output gear is sleeved on the output shaft; the output shaft can axially move relative to the output gear in a telescopic manner, so that the output shaft is coupled or decoupled from the output gear;

[0010] When the output shaft is coupled with the output gear, the output shaft is fixed to the output gear in the circumferential direction, so that the output shaft can rotate together with the output gear;

[0011] When the output shaft is decoupled from the output gear, the output shaft can rotate relative to the output gear in the circumferential direction, so that the output shaft does not rotate together with the output gear.

[0012] In one achievable manner, a first engaging structure is provided on the output shaft, and a second engaging structure is provided on the output gear; when the output shaft moves relative to the output gear in a telescopic manner, the first engaging structure can engage or disengage from the second engaging structure, so that the output shaft is coupled or decoupled from the output gear.

[0013] In one achievable manner, the first engaging structure includes a first flat shaft, and the second engaging structure includes a first flat hole adapted to the first flat shaft.

[0014] In one achievable manner, the transmission assembly further includes a transmission gear and an intermediate gear, a motor gear is provided on the drive shaft of the drive motor, the motor gear meshes with the transmission gear, the transmission gear meshes with the intermediate gear, and the intermediate gear meshes with the output gear.

[0015] In one achievable manner, the transmission gear includes a crown gear, and the intermediate gear includes a spur gear.

[0016] In one achievable manner, the driven wheel is sleeved on the output shaft, and the output shaft can axially move relative to the driven wheel in a telescopic manner; when the output shaft moves relative to the driven wheel in a telescopic manner, the output shaft remains coupled to the driven wheel.

[0017] In one achievable manner, the output shaft includes a second flat shaft, and a second flat hole adapted to the second flat shaft is provided on the driven wheel; when the output shaft moves relative to the driven wheel in a telescopic manner, the second flat shaft remains inserted in the second flat hole.

[0018] In an implementable manner, the driving mechanism further includes an elastic member, and the elastic member is connected to the output shaft; the elastic member is configured to drive the output shaft to change from the second state to the first state by elastic force.

[0019] In an implementable manner, the clutch component and the elastic member are respectively disposed at opposite ends of the output shaft; pressing the clutch component can push the output shaft to move toward the side close to the elastic member, so that the output shaft changes from the first state to the second state. At the same time, the elastic member can store energy under the extrusion of the output shaft, so that the elastic member drives the output shaft to change from the second state to the first state by elastic force after losing the extrusion of the output shaft.

[0020] In an implementable manner, the clutch component is rotatably connected to the end of the output shaft, and the output shaft can rotate relative to the clutch component.

[0021] In an implementable manner, the driving mechanism further includes a housing. The first end of the output shaft is located inside the housing, and the second end of the output shaft extends out of the housing; the output shaft can telescopically move and rotate relative to the housing;

[0022] The transmission assembly is located inside the housing, and the transmission assembly is connected to the first end of the output shaft;

[0023] The driven wheel and the clutch component are both located outside the housing. The clutch component is disposed at the end of the second end of the output shaft. The driven wheel is sleeved on the output shaft, and the driven wheel is located between the clutch component and the outer wall of the housing.

[0024] In an implementable manner, a sliding bearing is sleeved on the output shaft, and the output shaft is connected to the housing through the sliding bearing.

[0025] The present utility model further provides an electric rolling curtain, including a pull rope, a curtain, and the above-mentioned driving assembly. The pull rope is wound around the driven wheel, and the pull rope is connected to the curtain; the curtain includes a rolling curtain or a window curtain.

[0026] In an implementable manner, the pull rope is a bead rope, and the driven wheel is a sprocket.

[0027] The drive assembly provided by the present utility model has a first state and a second state for the output shaft. When the output shaft is in the first state, the output shaft is respectively coupled with the driven wheel and the transmission assembly, that is, the output shaft is respectively in transmission connection with the driven wheel and the transmission assembly. At this time, the drive motor can drive the driven wheel to rotate through the transmission assembly and the output shaft, and then drive the pull rope to move, realizing the function of the motor driving the rolling curtain. When the clutch component is manipulated to change the output shaft from the first state to the second state, the output shaft is decoupled from the driven wheel and / or the transmission assembly, that is, there is no transmission between the output shaft and the driven wheel and / or the transmission assembly. When the pull rope is manually pulled to move, the driven wheel will rotate following the pull rope, but the transmission assembly and the drive motor will not move synchronously, that is, the clutch function of the drive assembly is realized. At this time, the pull rope can be easily pulled without causing damage to the drive mechanism. This drive assembly can realize the free switching between motor-driven rolling curtain and manual-driven rolling curtain, and when manually driving the rolling curtain, it is not necessary to drive the drive motor and the transmission assembly to move synchronously. It can not only easily realize manual driving of the rolling curtain, saving time and effort, but also avoid damage to the drive mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of the drive assembly in an embodiment of the present utility model.

[0029] Figure 2 It is Figure 1 a schematic structural diagram in another direction.

[0030] Figure 3 It is Figure 1 an exploded structural diagram of...

[0031] Figure 4 It is an exploded structural diagram of the drive mechanism in an embodiment of the present utility model.

[0032] Figure 5 It is Figure 4 an exploded structural diagram after further decomposition.

[0033] Figure 6 It is Figure 5 a schematic structural diagram in another direction.

[0034] Figure 7 It is a schematic diagram of the cooperation relationship between the output shaft and the output gear in an embodiment of the present utility model.

[0035] Figure 8 It is a schematic diagram of the cooperation relationship between the output shaft and the driven wheel in an embodiment of the present utility model.

[0036] Figure 9 It is a schematic structural diagram of the output shaft in an embodiment of the present utility model.

[0037] Figure 10This is a schematic structural diagram of the output gear in the embodiment of the present utility model.

[0038] Figure 11 This is a schematic structural diagram of the clutch component in the embodiment of the present utility model.

[0039] Figure 12a This is a schematic diagram of the cooperation relationship between the driving mechanism, the driven wheel and the clutch component when the output shaft is in the first state in the embodiment of the present utility model.

[0040] Figure 12b This is a schematic diagram of the cooperation relationship between the driving mechanism, the driven wheel and the clutch component when the output shaft is in the second state in the embodiment of the present utility model.

[0041] In the figure: 1 - driven wheel, 11 - second flat position hole, 12 - first accommodating groove, 2 - pull rope, 3 - driving mechanism, 31 - driving motor, 310 - driving shaft, 311 - motor gear, 32 - transmission component, 321 - output gear, 3211 - first flat position hole, 3212 - round hole, 322 - transmission gear, 323 - intermediate gear, 324 - first rotating shaft, 325 - second rotating shaft, 33 - output shaft, 331 - first flat position shaft, 332 - second flat position shaft, 333 - cylindrical shaft, 334 - connecting shaft, 3341 - clamping groove, 34 - elastic member, 35 - housing, 351 - front housing, 352 - rear housing, 353 - second accommodating groove, 36 - sliding bearing, 37 - washer, 381 - first screw, 382 - second screw, 4 - clutch component, 41 - flange, 5 - base, 51 - installation groove. Detailed implementation manners

[0042] The following combines the drawings and embodiments to further describe in detail the specific implementation manners of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0043] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present utility model are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence.

[0044] The orientation terms such as up, down, left, right, front, back, top, bottom, etc. (if any) involved in the description and claims of the present utility model are defined based on the positions of the structures in the drawings and the positions relative to each other, only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of orientation terms should not limit the scope of protection claimed by the present utility model.

[0045] As Figures 1 to 6 and Figure 12a and Figure 12b shown, the driving assembly provided by the embodiment of the present utility model includes:

[0046] The driven wheel 1 is used to connect the pulling rope 2, and the driven wheel 1 can move synchronously with the pulling rope 2;

[0047] The driving mechanism 3 is used to drive the driven wheel 1 to rotate; the driving mechanism 3 includes a driving motor 31, an output shaft 33 and a transmission component 32. The transmission component 32 is connected between the driving motor 31 and the output shaft 33, and the output shaft 33 is connected to the driven wheel 1. The output shaft 33 has a first state (i.e., the coupling state) and a second state (i.e., the decoupling state), and can be switched between the two states; when the output shaft 33 is in the first state, the output shaft 33 is respectively coupled to the driven wheel 1 and the transmission component 32, so that the output shaft 33 is respectively in transmission connection with the driven wheel 1 and the transmission component 32; when the output shaft 33 is in the second state, the output shaft 33 is decoupled from the driven wheel 1 and / or the transmission component 32, so that there is no transmission between the output shaft 33 and the driven wheel 1 and / or the transmission component 32;

[0048] The clutch component 4 is connected to the output shaft 33; operating the clutch component 4 can make the output shaft 33 in the first state or the second state. Specifically, in this embodiment, operating the clutch component 4 can make the output shaft 33 change from the first state to the second state; of course, in other embodiments, it can also be that operating the clutch component 4 makes the output shaft 33 change from the second state to the first state; or, operating the clutch component 4 can make the output shaft 33 switch between the first state and the second state.

[0049] Specifically, for the drive assembly provided by the embodiments of the present utility model, since the output shaft 33 has a first state and a second state, when the output shaft 33 is in the first state, the output shaft 33 is respectively coupled to the driven wheel 1 and the transmission assembly 32, that is, the output shaft 33 is respectively in transmission connection with the driven wheel 1 and the transmission assembly 32. At this time, the drive motor 31 can drive the driven wheel 1 to rotate through the transmission assembly 32 and the output shaft 33, and then drive the pull rope 2 to move, realizing the function of the motor-driven rolling curtain. When the clutch member 4 is operated to change the output shaft 33 from the first state to the second state, the output shaft 33 is decoupled from the driven wheel 1 and / or the transmission assembly 32, that is, there is no transmission between the output shaft 33 and the driven wheel 1 and / or the transmission assembly 32. When the pull rope 2 is manually pulled to move, the driven wheel 1 will rotate following the pull rope 2, but the transmission assembly 32 and the drive motor 31 will not move synchronously (in the second state, when the output shaft 33 is decoupled from the driven wheel 1, the output shaft 33 will not move synchronously with the driven wheel 1; when the output shaft 33 is not decoupled from the driven wheel 1, the output shaft 33 will move synchronously with the driven wheel 1), that is, the clutch function of the drive assembly is realized. At this time, the pull rope 2 can be easily pulled, and the damage to the drive mechanism 3 can be avoided. This drive assembly can realize the free switching between motor-driven rolling curtain and manual-driven rolling curtain, and when manually driving the rolling curtain, it is not necessary to drive the drive motor 31 and the transmission assembly 32 to move synchronously. It can not only easily realize the manual driving of the rolling curtain, saving time and effort, but also avoid damaging the drive mechanism 3.

[0050] As an implementation manner, when the output shaft 33 is in the second state, the output shaft 33 is decoupled from the transmission assembly 32, and the output shaft 33 is still coupled to the driven wheel 1, that is, there is no transmission between the output shaft 33 and the transmission assembly 32 at this time, and the output shaft 33 is still in transmission connection with the driven wheel 1. Of course, in other embodiments, when the output shaft 33 is in the second state, it may also be that the output shaft 33 is decoupled from the driven wheel 1 and the output shaft 33 is kept coupled to the transmission assembly 32. At this time, there is no transmission between the output shaft 33 and the driven wheel 1, and the output shaft 33 is still in transmission connection with the transmission assembly 32; or the output shaft 33 is decoupled from both the transmission assembly 32 and the driven wheel 1 at the same time. At this time, there is no transmission between the output shaft 33 and the transmission assembly 32 and between the output shaft 33 and the driven wheel 1.

[0051] As Figures 4 to 6 and Figure 12a and Figure 12b shown, as an implementation manner, the transmission assembly 32 includes an output gear 321. The output gear 321 is in transmission connection with the drive shaft 310 of the drive motor 31, and the output gear 321 is sleeved on the output shaft 33. The output shaft 33 can axially move relative to the output gear 321 to couple or decouple the output shaft 33 from the output gear 321 (as Figure 12a shown, the output shaft 33 and the output gear 321 are in a coupled state; asFigure 12b As shown, the output shaft 33 and the output gear 321 are in a decoupled state). That is, when the output shaft 33 is in the first state, the output shaft 33 is coupled to the output gear 321; when the output shaft 33 is in the second state, the output shaft 33 is decoupled from the output gear 321.

[0052] Among them, when the output shaft 33 is coupled to the output gear 321, the output shaft 33 is fixed to the output gear 321 along its circumferential direction, so that the output shaft 33 can rotate together with the output gear 321. That is, at this time, the driving motor 31 can drive the driven wheel 1 through the output gear 321 and the output shaft 33. When the output shaft 33 is decoupled from the output gear 321, the output shaft 33 can rotate relative to the output gear 321 along its circumferential direction (that is, the output shaft 33 idles along its circumferential direction relative to the output gear 321), so that the output shaft 33 does not rotate together with the output gear 321. That is, at this time, when the pull rope 2 is manually pulled to move, the output shaft 33 rotates together with the driven wheel 1, while the output gear 321 and the driving motor 31 do not move synchronously with the output shaft 33.

[0053] As Figures 5 to 7 , Figure 9 , Figure 10 and Figure 12a and Figure 12b As shown, as an implementation manner, a first engaging structure (not labeled in the figure) is provided on the output shaft 33, and a second engaging structure (not labeled in the figure) is provided on the output gear 321. When the output shaft 33 axially moves relative to the output gear 321 in a telescopic manner, the first engaging structure can engage or disengage with the second engaging structure, so that the output shaft 33 is coupled or decoupled from the output gear 321. That is, when the first engaging structure engages with the second engaging structure, the output shaft 33 is coupled to the output gear 321; when the first engaging structure disengages from the second engaging structure, the output shaft 33 is decoupled from the output gear 321.

[0054] Specifically, in this embodiment, the first engaging structure includes a first flat shaft 331, and the second engaging structure includes a first flat hole 3211 adapted to the first flat shaft 331. When the output shaft 33 axially moves relative to the output gear 321 in a telescopic manner, as Figure 12a shown, when the first flat shaft 331 is located in the first flat hole 3211, the output shaft 33 is fixed to the output gear 321 along its circumferential direction, that is, at this time, the output shaft 33 is coupled to the output gear 321; as Figure 12bAs shown, when the first flat shaft 331 disengages from the first flat hole 3211, the engagement between the two is lost. At this time, the output shaft 33 can rotate relative to the output gear 321 along its circumferential direction, that is, the output shaft 33 is decoupled from the output gear 321. In this embodiment, the first flat shaft 331 is a double flat shaft, and the first flat hole 3211 is a double flat hole adapted to the double flat shaft; of course, in other embodiments, the first flat shaft 331 can also be a single flat shaft, and the first flat hole 3211 can also be a single flat hole.

[0055] As Figures 5 to 7 , Figure 9 , Figure 10 and Figure 12a and Figure 12b As shown, as an implementation manner, the output shaft 33 further includes a cylindrical shaft 333 connected to the first flat shaft 331. A round hole 3212 adapted to the cylindrical shaft 333 is provided on the output gear 321, and the round hole 3212 communicates with the first flat hole 3211. When the output shaft 33 moves axially relative to the output gear 321 in a telescopic manner, the cylindrical shaft 333 always remains inserted in the round hole 3212, so that the output gear 321 can always be sleeved on the output shaft 33 to maintain the supporting effect of the output shaft 33 on the output gear 321 and prevent the position of the output gear 321 from shifting.

[0056] As Figures 4 to 6 As shown, as an implementation manner, the transmission assembly 32 further includes a transmission gear 322 and an intermediate gear 323. A motor gear 311 is provided on the drive shaft 310 of the drive motor 31. The motor gear 311 meshes with the transmission gear 322, the transmission gear 322 meshes with the intermediate gear 323, and the intermediate gear 323 meshes with the output gear 321. Thus, the power of the drive motor 31 can be transmitted to the output shaft 33 successively through the motor gear 311, the transmission gear 322, the intermediate gear 323, and the output gear 321, thereby driving the driven wheel 1 to rotate and driving the pull rope 2 to move.

[0057] Specifically, in this embodiment, the intermediate gear 323 includes a spur gear, and the transmission gear 322 includes a crown gear. The advantages of using a crown gear for transmission include: the crown gear can achieve a 90-degree adjustment of the gear transmission direction like a worm drive, and it has a higher transmission efficiency than a worm drive and is more energy-efficient.

[0058] As Figure 8 and Figure 12a and Figure 12bAs shown, as an implementation, the driven wheel 1 is sleeved on the output shaft 33, and the output shaft 33 can telescopically move relative to the driven wheel 1 along its axial direction. When the output shaft 33 telescopically moves relative to the driven wheel 1, the output shaft 33 remains coupled with the driven wheel 1; that is, when the output shaft 33 is in the first state and the second state, the output shaft 33 is coupled with the driven wheel 1, and the output shaft 33 can keep rotating together with the driven wheel 1.

[0059] Specifically, in this embodiment, the output shaft 33 further includes a second flat shaft 332, the second flat shaft 332 is connected to the cylindrical shaft 333, the second flat shaft 332 is located on the side of the cylindrical shaft 333 away from the first flat shaft 331, and the driven wheel 1 is provided with a second flat hole 11 adapted to the second flat shaft 332. When the output shaft 33 telescopically moves relative to the driven wheel 1, the second flat shaft 332 remains inserted in the second flat hole 11; that is, when the output shaft 33 is in the first state and the second state, the second flat shaft 332 is inserted in the second flat hole 11, so that the output shaft 33 remains fixed to the driven wheel 1 along its circumferential direction. In this embodiment, the second flat shaft 332 is a single flat shaft, and the second flat hole 11 is a single flat hole; of course, in other embodiments, the second flat shaft 332 can also be a double flat shaft, and the second flat hole 11 can also be a double flat hole.

[0060] As Figures 4 to 6 and Figure 12a and Figure 12b As shown, as an implementation, the driving mechanism 3 further includes an elastic member 34, and the elastic member 34 is connected to the output shaft 33; the elastic member 34 is used to drive the output shaft 33 to change from the second state to the first state through elastic force, so that the output shaft 33 can automatically reset. Of course, in other embodiments, the elastic member 34 may not be provided, and the output shaft 33 can be manually reset after use.

[0061] As Figures 4 to 6 and Figure 12a and Figure 12b As shown, as an implementation, the clutch member 4 and the elastic member 34 are respectively arranged at opposite ends of the output shaft 33. By pressing the clutch member 4, the output shaft 33 can be pushed to move toward the side close to the elastic member 34, so that the output shaft 33 changes from the first state to the second state, and at the same time, the elastic member 34 can store energy under the extrusion of the output shaft 33, so that the elastic member 34 drives the output shaft 33 to change from the second state to the first state through elastic force after losing the extrusion of the output shaft 33.

[0062] Specifically, in this embodiment, the elastic member 34 is a spring, and the elastic member 34 abuts against the end of the output shaft 33. As Figure 12bAs shown, after the clutch component 4 is pressed by hand, the clutch component 4 pushes the output shaft 33 to move toward the side close to the elastic member 34. At this time, the output shaft 33 is decoupled from the output gear 321, and the elastic member 34 is compressed and stored after being squeezed by the output shaft 33; Figure 12a As shown, after the clutch component 4 is released (i.e., the clutch component 4 is no longer pressed by hand), the output shaft 33 loses the pushing effect of the clutch component 4, so the elastic member 34 also loses the squeezing effect of the output shaft 33. At this time, the output shaft 33 moves toward the side close to the clutch component 4 under the elastic force of the elastic member 34 and resets, so that the output shaft 33 is re-coupled with the output gear 321. Of course, in other embodiments, the clutch component 4 and the elastic member 34 can also be set at other positions, and the clutch component 4 can also drive the output shaft 33 to move telescopically in other ways (for example, by toggling, detent, pulling the clutch component 4, etc., to drive the output shaft 33 to move telescopically).

[0063] like Figure 11 and Figure 12a and Figure 12b As shown, as an embodiment, the clutch component 4 is rotatably connected to the end of the output shaft 33, and the output shaft 33 can rotate relative to the clutch component 4 along its circumferential direction. Since the clutch component 4 needs to be pressed by hand when the pull rope 2 is manually pulled to move (if the clutch component 4 is not pressed by hand, the output shaft 33 will be reset under the action of the elastic member 34, and the output shaft 33 cannot be decoupled from the output gear 321), in order to enable the output shaft 33 to rotate smoothly, and then the driven wheel 1 to rotate smoothly, the clutch component 4 is set to be rotatably connected to the output shaft 33 to avoid affecting the rotation of the output shaft 33 due to pressing the clutch component 4.

[0064] Of course, in other embodiments, a corresponding locking mechanism (not shown in the figure, the locking mechanism may be, for example, a locking mechanism) may be provided to limit the clutch component 4 and / or the output shaft 33, so that the output shaft 33 may be kept in the second state after the clutch component 4 is pressed, and in this case, there is no need to press the clutch component 4 by hand all the time, and the clutch component 4 and / or the output shaft 33 may be manually reset after use. In this case, the clutch component 4 and the output shaft 33 do not need to be rotationally connected, and the two may be fixedly connected.

[0065] like Figure 9 , Figure 11 , Figure 12a and Figure 12bAs shown, as an embodiment, the output shaft 33 further includes a connecting shaft 334. The connecting shaft 334 is connected to the second flat shaft 332, and the connecting shaft 334 is located on the side of the second flat shaft 332 away from the cylindrical shaft 333. The clutch member 4 is a cap. The clutch member 4 is fastened to the end of the connecting shaft 334, and the clutch member 4 can rotate relative to the connecting shaft 334. A ring of grooves 3341 is provided on the connecting shaft 334, and a flange 41 is provided on the clutch member 4. The flange 41 is stuck in the grooves 3341 to prevent the clutch member 4 from detaching from the connecting shaft 334.

[0066] As Figures 3 to 6 and Figure 12a and Figure 12b As shown, as an embodiment, the drive mechanism 3 further includes a housing 35. The first end of the output shaft 33 is located inside the housing 35, and the second end of the output shaft 33 extends outside the housing 35. The output shaft 33 can telescopically move and rotate relative to the housing 35 (that is, the output shaft 33 can telescopically move along its axial direction relative to the housing 35, and the output shaft 33 can rotate along its circumferential direction relative to the housing 35). The two ends of the elastic member 34 are respectively abutted against the output shaft 33 and the inner wall of the housing 35.

[0067] The transmission assembly 32 is located inside the housing 35, and the transmission assembly 32 is connected to the first end of the output shaft 33 (specifically, the output gear 321 is sleeved on the first end of the output shaft 33). The transmission gear 322 is rotatably connected to the inner wall of the housing 35 through a first rotating shaft 324, and the intermediate gear 323 is rotatably connected to the inner wall of the housing 35 through a second rotating shaft 325.

[0068] Both the driven wheel 1 and the clutch member 4 are located outside the housing 35. The clutch member 4 is arranged at the end of the second end of the output shaft 33. The driven wheel 1 is sleeved on the output shaft 33, and the driven wheel 1 is located between the clutch member 4 and the outer wall of the housing 35, and there is a gap between the driven wheel 1 and the outer wall of the housing 35.

[0069] Specifically, since the transmission assembly 32 is arranged inside the housing 35, the housing 35 can play a good role in protecting the transmission assembly 32 to prevent the transmission assembly 32 from being damaged. Since the pull rope 2 is connected to the driven wheel 1, and the driven wheel 1 is arranged outside the housing 35, the pull rope 2 is also located outside the housing 35, so that the pull rope 2 does not need to pass through the housing 35, simplifying the structural design and ensuring the sealing performance of the housing 35. Since the clutch member 4 is arranged outside the housing 35, it is convenient for the user to press the clutch member 4 by hand.

[0070] As Figures 3 to 6 and Figure 12a and Figure 12bAs shown, as an implementation manner, the driving motor 31 is disposed outside the housing 35 (specifically, the driving motor 31 is disposed below the housing 35, and the driving motor 31 is fixedly connected to the bottom of the housing 35 through the second screw 382). The driving shaft 310 of the driving motor 31 extends into the housing 35 and is in transmission connection with the transmission gear 322 through the motor gear 311. Of course, in other embodiments, the driving motor 31 may also be disposed inside the housing 35).

[0071] As Figure 3 well as Figure 12a and Figure 12b As shown, as an implementation manner, a first accommodation groove 12 is provided at a position corresponding to the clutch member 4 on the driven wheel 1. The first accommodation groove 12 is used to avoid the clutch member 4, so as to prevent interference between the clutch member 4 and the driven wheel 1 when the clutch member 4 moves toward the side close to the driven wheel 1 after being pressed (that is, after the clutch member 4 is pressed, the clutch member 4 can move into the first accommodation groove 12).

[0072] As Figure 12a well as Figure 12b As shown, as an implementation manner, a second accommodation groove 353 is provided at a position corresponding to the output shaft 33 on the inner wall of the housing 35. The two ends of the elastic member 34 are respectively abutted against the output shaft 33 and the inner wall of the second accommodation groove 353. The second accommodation groove 353 can avoid the output shaft 33, so as to prevent interference between the output shaft 33 and the inner wall of the housing 35 when the output shaft 33 moves toward the side away from the clutch member 4 (that is, when the output shaft 33 moves toward the side away from the clutch member 4, the end of the output shaft 33 can be received in the second accommodation groove 353).

[0073] As Figures 4 to 6 well as Figure 12a and Figure 12b As shown, as an implementation manner, a washer 37 is provided between the elastic member 34 and the inner wall of the housing 35. The washer 37 can prevent the elastic member 34 from directly contacting the inner wall of the housing 35 and causing wear of the housing 35).

[0074] As Figures 4 to 6 well as Figure 12a and Figure 12b As shown, as an implementation manner, a sliding bearing 36 is sleeved on the output shaft 33. The output shaft 33 is connected to the housing 35 through the sliding bearing 36, so that the output shaft 33 can extend, retract and rotate relative to the housing 35 more smoothly).

[0075] As Figures 4 to 6 well as Figure 12a and Figure 12bAs shown, as an implementation manner, the housing 35 includes a front housing 351 and a rear housing 352 connected to each other (specifically, the front housing 351 and the rear housing 352 are fixedly connected by a first screw 381). The output shaft 33 passes through the front housing 351, and both ends of the elastic member 34 are respectively abutted against the output shaft 33 and the inner wall of the rear housing 352. The number of the sliding bearings 36 is two, one of the sliding bearings 36 is arranged between the output shaft 33 and the front housing 351, and the other sliding bearing 36 is arranged between the output shaft 33 and the rear housing 352.

[0076] As Figures 1 to 3 shown, as an implementation manner, the drive assembly further includes a base 5. The drive mechanism 3 is arranged in the base 5 and fixedly connected to the base 5. An installation groove 51 is provided on the outer wall of the base 5. Both the driven wheel 1 and the clutch member 4 are located in the installation groove 51. One end of the output shaft 33 extends into the installation groove 51 and is connected to the driven wheel 1 and the clutch member 4.

[0077] This drive assembly has two modes: motor drive and manual drive. The working principles of the two modes are specifically as follows:

[0078] 1. In the motor drive mode, as Figure 12a shown, the output shaft 33 is in the first state, that is, the output shaft 33 is coupled to both the driven wheel 1 and the output gear 321 at the same time. At this time, the drive motor 31 can drive the driven wheel 1 to rotate through the transmission assembly 32 and the output shaft 33, and then drive the pull rope 2 to move, realizing the function of the motor-driven rolling curtain to rise and fall.

[0079] 2. In the manual drive mode, as Figure 12b shown, after pressing the clutch member 4 by hand, the clutch member 4 pushes the output shaft 33 to move toward the side close to the elastic member 34. At this time, the output shaft 33 is decoupled from the output gear 321, and the output shaft 33 remains coupled to the driven wheel 1. At the same time, the elastic member 34 compresses and stores energy after being squeezed by the output shaft 33. Keep pressing the clutch member 4 by hand to keep the output shaft 33 decoupled from the output gear 321. Then pull the pull rope 2 by hand to move, so as to realize the manual drive of the rolling curtain to rise and fall. During the process of manually pulling the pull rope 2, since the output shaft 33 is decoupled from the output gear 321, the transmission assembly 32 and the drive motor 31 will not move synchronously, so the pull rope 2 can be easily pulled without damaging the drive mechanism 3.

[0080] After the manual driving mode ends, the clutch member 4 is released (i.e., no longer pressed by hand), and the output shaft 33 loses the pushing effect of the clutch member 4. Therefore, the elastic member 34 also loses the extrusion effect of the output shaft 33. At this time, the output shaft 33 moves and resets toward the side close to the clutch member 4 under the elastic force of the elastic member 34, so that the output shaft 33 is re-coupled with the output gear 321, preparing for the next motor-driven rolling curtain lifting and lowering.

[0081] An embodiment of the present invention further provides an electric rolling curtain, which includes a pull rope 2, a curtain (not shown in the figure), and the above-mentioned driving assembly. The pull rope 2 is wound around the driven wheel 1, so that the pull rope 2 and the driven wheel 1 can move synchronously; the pull rope 2 is connected to the curtain. The curtain includes a rolling curtain or a window curtain, and the driving assembly can drive the curtain to be wound up and / or lifted and lowered.

[0082] As Figures 1 to 3 shown, as an implementation manner, the pull rope 2 is a bead rope, and the driven wheel 1 is a sprocket. The bead rope is wound around the sprocket, and the bead rope meshes with the sprocket (i.e., the beads in the bead rope are stuck between the teeth of the sprocket); for the structure and cooperation relationship of the bead rope and the sprocket, reference can be made to the prior art and will not be elaborated here. Of course, in other embodiments, the pull rope 2 and the driven wheel 1 can also be of other structures.

[0083] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A drive assembly, characterized in that: include: A driven wheel (1) for connecting a pull rope (2); A driving mechanism (3) for driving the driven wheel (1) to rotate; the driving mechanism (3) comprises a driving motor (31), an output shaft (33) and a transmission assembly (32); the transmission assembly (32) is connected between the driving motor (31) and the output shaft (33); the output shaft (33) is connected to the driven wheel (1); the output shaft (33) has a first state and a second state; when the output shaft (33) is in the first state, the output shaft (33) is coupled to the driven wheel (1) and the transmission assembly (32) respectively, so that the output shaft (33) is respectively connected to the driven wheel (1) and the transmission assembly (32); when the output shaft (33) is in the second state, the output shaft (33) is decoupled from the driven wheel (1) and / or the transmission assembly (32), so that no transmission is performed between the output shaft (33) and the driven wheel (1) and / or the transmission assembly (32); A clutch component (4) is connected to the output shaft (33); the output shaft (33) can be placed in the first state or the second state by operating the clutch component (4).

2. The drive assembly according to claim 1, characterized in that The transmission assembly (32) comprises an output gear (321), the output gear (321) is in transmission connection with the driving shaft (310) of the driving motor (31), and the output gear (321) is sleeved on the output shaft (33); the output shaft (33) can be telescopically moved along its axial direction relative to the output gear (321), so that the output shaft (33) and the output gear (321) are coupled or decoupled; When the output shaft (33) is coupled to the output gear (321), the output shaft (33) is fixed to the output gear (321) along its circumference, so that the output shaft (33) can rotate along with the output gear (321); When the output shaft (33) is decoupled from the output gear (321), the output shaft (33) can rotate relative to the output gear (321) along its circumference, so that the output shaft (33) does not rotate along with the output gear (321).

3. The drive assembly according to claim 2, characterized in that: The output shaft (33) is provided with a first engaging structure, and the output gear (321) is provided with a second engaging structure; when the output shaft (33) telescopically moves relative to the output gear (321), the first engaging structure can engage with or disengage from the second engaging structure, so that the output shaft (33) is coupled or decoupled from the output gear (321).

4. The drive assembly according to claim 3, characterized in that: The first engaging structure comprises a first flattening axis (331), and the second engaging structure comprises a first flattening hole (3211) matched with the first flattening axis (331).

5. The drive assembly according to claim 2, characterized in that: The transmission assembly (32) further comprises a transmission gear (322) and an intermediate gear (323); a motor gear (311) is provided on the driving shaft (310) of the driving motor (31); the motor gear (311) meshes with the transmission gear (322); the transmission gear (322) meshes with the intermediate gear (323); and the intermediate gear (323) meshes with the output gear (321).

6. The drive assembly according to claim 5, characterized in that The transmission gear (322) comprises a crown gear, and the intermediate gear (323) comprises a spur gear.

7. The drive assembly according to claim 1, characterized in that: The driven wheel (1) is sleeved on the output shaft (33), and the output shaft (33) can be telescopically moved relative to the driven wheel (1) along its axial direction; when the output shaft (33) is telescopically moved relative to the driven wheel (1), the output shaft (33) remains coupled to the driven wheel (1).

8. The drive assembly according to claim 7, characterized in that The output shaft (33) comprises a second flattened shaft (332), and the driven wheel (1) is provided with a second flattened hole (11) matched with the second flattened shaft (332); when the output shaft (33) moves telescopically relative to the driven wheel (1), the second flattened shaft (332) remains inserted into the second flattened hole (11).

9. The drive assembly according to claim 1, characterized in that: The driving mechanism (3) further comprises an elastic member (34), wherein the elastic member (34) is connected to the output shaft (33); the elastic member (34) is used to drive the output shaft (33) to change from the second state to the first state through elastic force.

10. The drive assembly according to claim 9, characterized in that The clutch component (4) and the elastic component (34) are respectively arranged at opposite ends of the output shaft (33); pressing the clutch component (4) can push the output shaft (33) to move toward a side close to the elastic component (34), so that the output shaft (33) changes from a first state to a second state; at the same time, the elastic component (34) can accumulate force under the squeezing action of the output shaft (33), so that the elastic component (34) drives the output shaft (33) to change from the second state to the first state through elastic force after losing the squeezing action of the output shaft (33).

11. The drive assembly according to claim 10, characterized in that The clutch component (4) is rotatably connected to the end of the output shaft (33), and the output shaft (33) can rotate relative to the clutch component (4).

12. The drive assembly according to any one of claims 1 to 11, characterized in that: The driving mechanism (3) further comprises a housing (35), a first end of the output shaft (33) being located inside the housing (35), and a second end of the output shaft (33) extending out of the housing (35); the output shaft (33) being telescopically movable and rotatable relative to the housing (35); The transmission assembly (32) is located in the housing (35), and the transmission assembly (32) is connected to the first end of the output shaft (33); The driven wheel (1) and the clutch component (4) are both located outside the housing (35); the clutch component (4) is arranged at the end of the second end of the output shaft (33); the driven wheel (1) is sleeved on the output shaft (33); and the driven wheel (1) is located between the clutch component (4) and the outer wall of the housing (35).

13. The drive assembly according to claim 12, characterized in that The output shaft (33) is sleeved with a sliding bearing (36), and the output shaft (33) is connected to the housing (35) via the sliding bearing (36).

14. An electric rolling shutter, characterized in that: It comprises a pull rope (2), a curtain and a driving assembly as described in any one of claims 1 to 13, wherein the pull rope (2) is wound around the driven wheel (1), and the pull rope (2) is connected to the curtain; the curtain comprises a roller blind or a window curtain.

15. The electric roller blind according to claim 14, characterized in that: The pull rope (2) is a bead pull rope, and the driven wheel (1) is a sprocket wheel.

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