Driving device and electric curtain

Abstract

The present application provides a driving device including: a driven wheel configured to connect a pulling rope; a driving mechanism configured to drive the driven wheel to rotate; wherein the driving mechanism includes 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; when the output shaft is in a first state, the output shaft is coupled to the driven wheel and the transmission assembly respectively to form transmission connection; when the output shaft is in the second state, the output shaft is decoupled from the driven wheel and/or the transmission assembly to disconnect the transmission connection. The present application further provides an electric curtain having the driving device.

What is claimed is: 
     
         1 . A driving device comprising:
 a driven wheel configured to connect a pulling rope;   a driving mechanism configured to drive the driven wheel to rotate; wherein 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 preset first and second states, when the output shaft is in the first state, the output shaft is coupled to the driven wheel and the transmission assembly respectively, so that the output shaft is connected to the driven wheel and the transmission assembly in a transmission way respectively; 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 there is no transmission connection between the output shaft and the driven wheel and/or the transmission assembly.   
     
     
         2 . The driving device according to  claim 1 , wherein the transmission assembly comprises an output gear, the output gear is connected to a drive shaft of the driving motor in a transmission way, and the output gear is sleeved on the output shaft; the output shaft is capable of moving to extend and contract along its axial direction relative to the output gear, so that the output shaft is coupled with or decoupled from the output gear;
 when the output shaft is coupled with the output gear, the output shaft is fixed to the output gear along its circumference, so that the output shaft can rotate along with the output gear;   when the output shaft is decoupled from the output gear, the output shaft can rotate along its circumference relative to the output gear, so that the output shaft does not rotate along with the output gear.   
     
     
         3 . The driving device according to  claim 2 , wherein the output shaft is provided with a first engagement structure, and the output gear is provided with a second engagement structure;
 when the output shaft moves to extend and retract relative to the output gear, the first engagement structure is capable of engaging with or disengaging from the second engagement structure to make the output shaft be coupled with or decoupled from the output gear; and/or   the first engagement structure comprises one of a first flat shaft and a first flat hole that are adapted, and the second engagement structure comprises the other of the first flat shaft and the first flat hole that are adapted.   
     
     
         4 . The driving device according to  claim 2 , wherein the transmission assembly further comprises a transmission gear and an intermediate gear, the drive shaft of the driving motor is provided with a motor gear, 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; and/or
 the transmission gear comprises a crown gear, and the intermediate gear comprises a flat gear.   
     
     
         5 . The driving device according to  claim 2 , wherein the driven wheel is sleeved on the output shaft, and the output shaft is capable of moving to extend and contract relative to the driven wheel along its axial direction; when the output shaft moves to extend and retract relative to the driven wheel, the output shaft remains being coupled with the driven wheel; and/or
 the output shaft comprises a second flat shaft, and the driven wheel is provided with a second flat hole adapted to the second flat shaft; when the output shaft moves to extend and retract relative to the driven wheel, the second flat shaft remains being inserted in the second flat hole.   
     
     
         6 . The driving device according to  claim 2 , wherein the driving mechanism further comprises a clutch member connected to the output shaft; operating the clutch member is capable of making the output shaft be in the first state or the second state; and/or
 the driving mechanism further comprises a first elastic member, the first elastic member is connected to the output shaft, and the first elastic member is configured to drive the output shaft to transit from the second state to the first state through elastic force; and/or   the clutch member and the first elastic member are respectively arranged at two opposite ends of the output shaft; pressing the clutch member is capable of pushing the output shaft to move towards a side close to the first elastic member and making the output shaft to transit from the first state to the second state; the first elastic member is capable of storing force under squeezing action of the output shaft at the same time, so that the first elastic member drives the output shaft to transit from the second state to the first state through elastic force after losing the squeezing action of the output shaft; and/or   the clutch member is rotatably connected to an end of the output shaft, and the output shaft is rotatable relative to the clutch member.   
     
     
         7 . The driving device according to  claim 2 , wherein the driving mechanism further comprises a housing;
 a first end of the output shaft is located inside the housing, and a second end of the output shaft extends outside the housing; the output shaft is capable of telescopic movement and rotation relative to the housing; the transmission assembly is located inside the housing, and the transmission assembly is connected to the first end of the output shaft; both the driven wheel and the clutch assembly are located outside the housing, the clutch member is arranged at a distal 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 member and an outer wall of the housing; and/or   a sliding bearing is sleeved on the output shaft, and the output shaft is connected to the housing through the sliding bearing.   
     
     
         8 . The driving device according to  claim 1 , wherein the transmission assembly comprises a first transmission wheel group and a second transmission wheel group, the driving motor is connected to the first transmission wheel group, the first transmission wheel group meshes with the second transmission wheel group, and the second transmission wheel group is connected to the output shaft; the driving device further comprises a housing and a clutch assembly, the first transmission wheel group and the second transmission wheel group are arranged inside the housing, the clutch assembly movably meshes with the second transmission wheel group, the driven wheel is connected to the output shaft, and the driven wheel is further configured to connect a pulling rope of a curtain body;
 wherein the second transmission wheel group is switched between preset first and second states in response to movement of the clutch assembly; 
 in the second state, the second transmission wheel group rotates in response to rotation of the driven wheel, so as to realize that the driven wheel drives the curtain body to move under action of manually driving force coming from the pulling rope; 
 in the first state, the second transmission wheel group drives the driven wheel in response to rotation of the first transmission wheel group, and thereby drives the curtain body to move. 
 
     
     
         9 . The driving device according to  claim 8 , wherein the second transmission wheel group comprises a planetary wheel group, an annular gear, and a planet carrier, the planetary wheel group is located inside the annular gear and meshes with the annular gear and the first transmission wheel group, the clutch assembly is movably arranged between the annular gear and the housing, the planet carrier is connected to the first transmission wheel group and the planetary wheel group, and the output shaft is formed on the planet carrier; and/or
 the annular gear switches between the first state and the second state in response to movement of the clutch assembly; in the second state, the annular gear is rotatable relative to the housing, the driven wheel, the planetary carrier, the annular gear, and the planetary wheel group form a power system, the annular gear rotates in response to rotation of the planetary carrier, so as to realize that the driven wheel drives the curtain body to move under action of manually driving force coming from the pull rope; in the first state, the annular gear is fixed to the housing, the driving motor, the first transmission wheel group, the planetary wheel group, the planetary carrier, and the driven wheel form a power system, the planetary wheel group responds to rotation of the first transmission wheel group to drive the curtain body to move; and/or   when an end of the clutch assembly abuts an outer wall of the annular gear and an inner wall of the housing, the annular gear is in the first state relative to the housing, and the driving motor is capable of driving the first transmission wheel group to move forward; when the end of the clutch assembly is separated from the outer wall of the annular gear, the annular gear is in the second state relative to the housing, and the first transmission wheel group is in a reverse motion locking state.   
     
     
         10 . The driving device according to  claim 8 , wherein the driving device further comprises a second elastic member, a baffle plate protrudes from a side wall of the clutch assembly, the second elastic member abuts between opposite surfaces of the baffle plate and of the housing, and the second elastic member is configured to move towards the annular gear along a direction of movement of the clutch assembly; and/or
 an outer wall of the gear ring forms multiple recesses, the multiple recesses are evenly distributed along a circumferential direction of the gear ring, and the multiple recesses are concavely and convexly matched with an end of the clutch assembly.   
     
     
         11 . The driving device according to  claim 8 , wherein the side wall of the clutch assembly is provided with a protruding shaft, the housing is provided with a first through groove extending along the direction of movement of the clutch assembly, and the protruding shaft penetrates the first through groove; and/or
 the driving device further comprises a clutch push block, one end of the clutch push block forms a sleeve, another end of the clutch push block forms an operating end for manual clutch, and the sleeve is sleeved on the protruding shaft; and/or   the driving device further comprises an electric control assembly, the electric control assembly is provided with a first through hole and a second through groove, wherein the electronic control assembly is arranged at a side of the clutch push block away from the housing and covered on the housing, and the electronic control assembly is connected to the driving motor in communication and is provided with an electrical button on one side; the output shaft passes through the first through hole and extends to a side of the electronic control assembly away from the housing;   the second through groove forms a clutch operation window and accommodates the operating end.   
     
     
         12 . The driving device according to  claim 8 , wherein the first transmission wheel group comprises a worm wheel, a worm rod, a first gear, a second gear, and a sun gear, wherein the worm rod is connected to an output end of the driving motor and meshes with the worm wheel; the first gear is coaxially connected to the worm wheel and is rotatably mounted on the housing; the second gear is rotatably mounted on the housing and meshes with the first gear and a large annular gear of the sun gear; the sun gear is mounted on a first shaft end of the planet carrier, and a small annular gear of the sun gear meshes with the planetary gear group; and/or
 the planetary gear group comprises multiple planetary gears, the multiple planetary gears are rotatably mounted on second shaft ends of the planet carrier; the multiple planetary gears are evenly distributed in the annular gear and mesh with the annular gear respectively; the multiple planetary gears are arranged outside the small annular gear of the sun gear and mesh with the small annular gear of the sun gear respectively.   
     
     
         13 . The driving device according to  claim 8 , wherein when the clutch assembly and the annular gear are in the first state, power of the driving motor is transmitted to the sun gear of the first transmission wheel group through the output end of the driving motor, the small annular gear of the sun gear drives the planetary gears to rotate, the planetary gears drive the output shaft of the planetary carrier to rotate, the output shaft of the planetary carrier drives the driven wheel to move, the driven wheel is used to drive the pulling rope to move; when the clutch assembly is moved so that the clutch assembly and the annular gear are in the second state, the driven wheel is used to drive the output shaft of the planetary carrier to rotate under drive of the pulling rope, the planetary carrier drives the planetary gears to rotate, and the planetary gears drive the annular gear to rotate; when the clutch assembly is driven to move along a direction away from the annular gear, an end of the clutch assembly separates from the outer wall of the annular gear, so that the clutch assembly and the annular gear are in the second state. 
     
     
         14 . An electric curtain comprising: a pulling rope, a curtain body, and a driving device according to  claim 1 , wherein the pulling rope is wound around the driven wheel, and the pulling rope is connected to the curtain body; the pulling rope is a bead pulling rope. 
     
     
         15 . The electric curtain according to  claim 14 , further comprising a curtain anti-drop device; wherein the curtain anti-drop device comprises:
 an anti-drop structure comprising a clamping arm;   a power structure comprising a front housing, wherein the driven wheel is rotatably connected to the front housing, the driven wheel is configured to mesh with the pulling rope and further used to drive the pulling rope to rotate;   wherein the clamping arm is rotatably connected to the front housing, and the clamping arm is configured to press the pulling rope against the driven wheel.   
     
     
         16 . The electric curtain according to  claim 15 , wherein the number of clamping arm is at least two, and the at least two clamping arms are arranged on opposite sides of the driven wheel; or the number of clamping arm is one, and the clamping arm surrounds an outer side of the driven wheel; and/or
 the driven wheel defines multiple snap slots along a circumference thereof, the snap slots are configured to engage with the pull rope; and/or   the clamping arm comprises a connection part and a clamping part that are connected to each other, the connection part is rotatably connected to the front housing, and the clamping part bends and extends towards a direction close to the driven wheel; and/or   the clamping part is provided with a convex strip, the convex strip is arranged at a side of the clamping part near the driven wheel, and the convex strip is configured to press the pulling rope against the driven wheel; and/or   the connection part is provided with a convex post, the convex post is arranged at a side of the connection part near the housing; the front housing is provided with a rotation groove, and the convex post is inserted in the rotation groove and rotatably cooperates with the rotation groove; and/or   the rotation groove bends and extends on the front housing, and the convex post is inserted in the rotation groove and slidable in the rotation groove.   
     
     
         17 . The electric curtain according to  claim 16 , wherein the anti-drop structure comprises a rotation element, the front housing is provided with a first mounting groove, and the rotation element extends into the first mounting groove and is connected to the front housing; the connection part is provided with a second mounting groove, and the connection part is sleeved on the outer circumference of the rotation element through the second mounting groove and rotatably cooperates with the rotation element; and/or
 the anti-drop structure further comprises a lock element, the lock element passes through the first mounting groove and is connected to the rotation element to fix the rotation element with the front housing; and/or   the rotation element comprises a rod body and a limiting part, the rod body extends into the first mounting groove and is connected to the front housing, the connection part is sleeved on an outer circumference of the rod body through the second mounting groove and rotatably cooperates with the rod body, the limiting part is connected to the rod body in a circumferential direction, and the limiting part abuts the front housing; and/or   an end of the rotation element extending out of the second mounting groove is provided with a limiting slot, and the anti-drop structure comprises a snap element, the snap element is inserted in the limiting slot and abuts the connection part; and/or   the connection part is provided with a rolling sleeve, the rolling sleeve is sleeved on an outer circumference of the rotation element and located in the second mounting groove; and/or   the anti-drop structure comprises a third elastic member, a side of the housing extends towards a direction away from the clamping arm to form a protruding part, the third elastic member has one end elastically connected to the clamping arm and another end wound around the protruding part, and the third elastic member is configured to push the clamping arm to rotate towards a direction close to the driven wheel; and/or   when the clamping arm rotates towards a direction away from the driven wheel, the clamping arm pushes the third elastic member to move and makes the third elastic member generate elastic deformation, the third elastic member pushes the clamping arm to rotate towards the direction close to the driven wheel through elastic deformation.   
     
     
         18 . The electric curtain according to  claim 14 , further comprising a tension adjusting device configured to tension the pulling rope, wherein the tension adjusting device comprises:
 an outer housing configured to fixed to a wall;   a tension structure comprising a first wheel and a second wheel, wherein the first wheel is movably connected to the outer housing, the second wheel is connected to the outer housing, the first wheel and the second wheel are sequentially arranged along a length direction of the outer housing, and the first wheel and the second wheel are configured for winding the pulling rope; and   a driving structure connected to the first wheel, wherein the driving structure is configured to drive the first wheel to move along a width direction of the outer housing.   
     
     
         19 . The electric curtain according to  claim 18 , wherein the number of second wheel is multiple; along a length direction of the outer housing, the multiple second wheels are respectively arranged at both two sides of the first wheel; along a width direction of the outer housing, the multiple second wheels are arranged at the same side of the first wheel; and/or
 the length direction and the width direction define a first plane, a projection center of the first wheel on the first plane is a first center, projection centers of the multiple second wheels on the first plane are second centers, along the length direction, an included angle between connection lines from the first center to the second centers at two sides thereof is α; when the first wheel moves along the width direction of the outer housing, 160°<α<250°; and/or   a diameter of the first wheel is greater than a diameter of the second wheel; and/or   an outer side of the first wheel recesses inward to form a first limiting slot, and/or an outer side of the second wheel recesses inward to form a second limiting slot; the first limiting slot and the second limiting slot are configured to limit the pulling rope; and/or   the first wheel comprises a first limiting part and a first roller part, the first roller part is connected to the outer housing, the first limiting part is connected to the top of the first roller part, and a projection of the first limiting part on the first plane covers a projection of the first roller part on the first plane; and/or the second wheel comprises a second limiting part and a second roller part, the second limiting part is connected to the outer housing, the second limiting part is connected to the top of the second roller part, and a projection of the second limiting part on the first plane covers a projection of the second roller part on the first plane.   
     
     
         20 . The electric curtain according to  claim 18 , wherein the tension structure further comprises a first fixing post and a second fixing post, the first fixing post is movably connected to the outer housing and is connected to the driving structure, the second fixing post is connected to the housing; the first wheel is sleeved on the first fixing post, and the second wheel is sleeved on the second fixing post; the first wheel rotatably cooperates with the first fixing post, and the second wheel rotatably cooperates with the second fixing post; and/or
 the tension structure comprises a first fixing member and a second fixing member, the first fixing member is connected to the first fixing post and located at the top of the first wheel, and the first fixing member is configured to axially limit the first wheel; the second fixing member is connected to the second fixing post and located at the top of the second wheel, and the second fixing member is configured to axially limit the second wheel.