Driving device of electric curtain

Abstract

The embodiment of the invention provides a driving device of an electric curtain. The driving device comprises a double-head motor, two groups of executing mechanisms and two transmission mechanisms, the two groups of actuating mechanisms are driven by two output shafts of the double-head motor in a one-to-one correspondence manner; each executing mechanism comprises a transmission shaft parallel to an output shaft of the double-end motor, at least two rope winding barrel assemblies arranged on the transmission shaft in a sleeving mode and relatively fixed to the transmission shaft in the circumferential direction, and at least two bearing ropes wound around the corresponding rope winding barrel assemblies in a one-to-one correspondence mode. The bearing ropes of the same group of actuating mechanisms are connected to the same height position of the curtain body, and the bearing ropes of different groups of actuating mechanisms are respectively connected to different height positions of the curtain body; the two transmission mechanisms are arranged between the output shafts of the double-end motor and the transmission shafts of the corresponding executing mechanisms so as to achieve power transmission. According to the embodiment, the bearing ropes of the same executing mechanism can be synchronously wound and unwound, balance lifting of the curtain body is achieved, one double-head motor drives the two executing mechanisms, and cost is lower.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of electric curtains, and in particular to a driving device for electric curtains. Background Art

[0002] Electric curtains use a drive device with a motor as the core to drive the curtain body to rise and fall or slide left and right, thereby realizing the switching control of the curtain between closing to block light and opening to let light in.

[0003] The existing drive device for electric curtains includes a motor and an actuator disposed between the motor and the curtain body and driven by the motor to cause the curtain body to rise and fall or slide left and right. The curtain body of electric curtains, such as electric roller blinds, electric honeycomb blinds, and electric sun and moon blinds, moves in a lifting manner. To ensure that the curtain body can be raised and lowered synchronously and in a balanced manner, the actuator is usually provided with at least two load-bearing ropes symmetrically distributed across the width of the curtain body to support the curtain body. Each load-bearing rope is provided with a rope drum assembly for retracting and releasing the load-bearing rope, thereby driving the curtain body to rise and fall. At the same time, to simplify the structure, a double-headed motor with an output shaft at each opposite end is usually disposed in the middle section of the upper beam of the electric curtain. Each rope drum assembly is arranged at opposite ends of the double-headed motor and is connected to the output shaft at the corresponding end of the double-headed motor via a transmission shaft. The two output shafts of the double-headed motor synchronously drive each rope drum assembly to achieve the action of retracting and releasing the load-bearing rope.

[0004] However, during implementation, the inventors discovered that in the aforementioned conventional electric curtain drive device, the two output shafts of the double-headed motor each drive at least two rope drum assemblies that need to operate synchronously. This places high demands on the synchronous power output of the two output shafts of the double-headed motor. In actual use, this can easily lead to poor synchronization of the power output of the two output shafts of the double-headed motor, causing the curtain to tilt during the raising and lowering process. In severe cases, the curtain may become stuck and unable to be raised or lowered. Furthermore, for electric curtains such as sun and moon curtains, where the curtain body needs to be raised and lowered separately in sections, the raising and lowering motion of different parts of the curtain body (such as the upper and lower halves) must be independently controlled. The existing approach involves providing a drive device for each curtain body section that requires independent raising and lowering control. This results in a cumbersome internal structure of the upper beam, hindering its miniaturization and resulting in high costs. Summary of the Invention

[0005] The technical problem to be solved by the embodiments of the present invention is to provide a driving device for an electric curtain, which can effectively simplify the structure, effectively realize the synchronous retraction and extension of the carrying rope, and can drive different parts of the curtain body to rise and fall respectively.

[0006] In order to solve the above technical problems, the embodiment of the present invention provides the following technical solution: a driving device for an electric curtain, comprising: A double-ended motor with an output shaft at each opposite end; Two groups of actuators driven one-to-one by the two output shafts of the double-headed motor, each group of actuators comprising a transmission shaft arranged parallel to the output shaft of the double-headed motor, at least two rope drum assemblies sleeved on the transmission shaft and fixed relative to the transmission shaft in the circumferential direction, and at least two load ropes wound one-to-one around the corresponding rope drum assemblies, the load ropes of the actuators in the same group being connected to the same height position of the curtain body, while the load ropes of the actuators in different groups being connected to different height positions of the curtain body; and Two transmission mechanisms are respectively arranged between each output shaft of the double-headed motor and the transmission shaft of a corresponding group of the actuators to realize power transmission.

[0007] Furthermore, at least two of the rope drum assemblies of each group of the actuators are correspondingly arranged at opposite ends of the double-headed motor.

[0008] Furthermore, the transmission mechanism includes a driving gear assembled on the output shaft and fixed relative to the output shaft in the circumferential direction, and a driven gear sleeved on the corresponding transmission shaft and fixed relative to the transmission shaft in the circumferential direction, and the driving gear meshes with the driven gear.

[0009] Furthermore, the transmission mechanism also includes a box for accommodating the driving gear and the driven gear, the box is provided with a first chamber for positioning and accommodating the driving gear and a second chamber for positioning and accommodating the driven gear and connected to the first chamber, the first chamber is adjacent to the cavity wall of the double-headed motor on one side and is provided with a first through-hole for the output shaft to pass through the interior of the first chamber, and the cavity walls on opposite sides of the second chamber are provided with second through-holes coaxially arranged with each other and for the transmission shaft to pass through.

[0010] Furthermore, the transmission shafts belonging to the two groups of the actuators are symmetrically arranged on opposite sides of the double-headed motor, the first chamber is located in the middle of the box body, and a second chamber is provided on each opposite side of the first chamber.

[0011] Furthermore, the cavity wall of the first chamber on the other side away from the double-headed motor is also provided with an axial hole coaxial with the first through-hole, and the opposite ends of the driving gear each protrude to form a first shaft rod, and the two first shaft rods are respectively pivoted in the first through-hole and the axial hole. A first coupling hole corresponding to the driving gear and the first shaft rods at both ends is opened at the axis center of the driving gear, and the output shaft is correspondingly provided in the first coupling hole and is relatively fixed to the hole wall of the first coupling hole in the circumferential direction.

[0012] Furthermore, the opposite ends of the driven gear each protrude to form a second shaft rod, and the two second shaft rods are respectively pivoted in the second through-holes opened on the opposite side walls of the second chamber. A second coupling hole corresponding to the driven gear and the second shaft rods at both ends is opened at the axis center of the driven gear, and the transmission shaft passes through the second coupling hole and is relatively fixed to the hole wall of the second coupling hole in the circumferential direction.

[0013] Furthermore, a first limiting protrusion is protruded from the cavity wall of the first cavity for axially abutting against the end face of the driving gear; a second limiting protrusion is protruded from the cavity wall of the second cavity for axially abutting against the end face of the driven gear.

[0014] Furthermore, the rope drum assembly includes a support seat, a rope drum pivotally mounted on the support seat at opposite ends by means of ball bearings, and a cover body covering the support seat. The support seat and the cover body cooperate to form a storage space for accommodating the rope drum. The opposite ends of the rope drum each protrude to form a shaft tube. The ball bearing is sleeved on the shaft tube and the inner ring is relatively fixed to the shaft tube in the circumferential direction. The outer ring of the ball bearing is correspondingly accommodated in the pivot groove of the support seat, and the transmission shaft passes through the inner hole of the shaft tube.

[0015] Furthermore, the rope drum assemblies of the actuators belonging to the two groups are arranged at the same position in the width direction of the curtain body, and the support seats and the cover bodies of the two rope drum assemblies arranged at the same position are respectively connected into one body in a one-to-one correspondence.

[0016] After adopting the above technical solution, the embodiment of the present invention has at least the following beneficial effects: in this embodiment, only one double-headed motor is required to be provided, and two transmission mechanisms are cooperated to connect the two output shafts of the double-headed motor with the transmission shafts of the two groups of actuators in a one-to-one correspondence. Thus, the output shafts at different ends of the double-headed motor can output power to drive the transmission shafts of different groups of actuators to rotate, and the transmission shafts then drive the rope drum assemblies mounted on the transmission shafts to rotate synchronously and then synchronously retract and release the load-bearing ropes of the same group of actuators, thereby achieving balanced lifting and lowering of the curtain body with good synchronization; in addition, only one double-headed motor is required to drive the two groups of actuators to achieve separate lifting and lowering control of two different parts of the curtain body, which effectively simplifies the structure of the driving device, facilitates assembly and drive control, and has lower costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of an optional embodiment of the driving device of the electric curtain of the present invention installed on the electric curtain.

[0018] Figure 2This is a structural diagram of an optional embodiment of the driving device for the electric curtain of the present invention in an assembled state.

[0019] Figure 3 This is a schematic structural diagram of an optional embodiment of the driving device for the electric curtain of the present invention in a disassembled state.

[0020] Figure 4 This is a cross-sectional view of an optional embodiment of the driving device for the electric curtain of the present invention along a plane passing through the central axes of the two transmission shafts.

[0021] Figure 5 yes Figure 4 A partial enlarged view of part A in the middle. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the following exemplary embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention. Moreover, the embodiments and features of the embodiments of the present invention may be combined with each other unless there is a conflict.

[0023] like Figure 1-Figure 5 As shown, an optional embodiment of the present invention provides a driving device for an electric curtain, comprising: A double-ended motor 1 with an output shaft 10 at each of its two opposite ends; Two groups of actuators 3 driven one-to-one by the two output shafts 10 of the double-headed motor 1, each group of actuators 3 including a transmission shaft 30 arranged parallel to the output shaft 10 of the double-headed motor 1, at least two rope drum assemblies 32 sleeved on the transmission shaft 30 and fixed relative to the transmission shaft 30 in the circumferential direction, and at least two load ropes 34 wound one-to-one around the corresponding rope drum assemblies 32, the load ropes 34 of the actuators 3 in the same group being connected to the same height position of the curtain body, while the load ropes 34 of the actuators 3 in different groups being connected to different height positions of the curtain body 9; and Two transmission mechanisms 5 are respectively provided between each output shaft 10 of the double-headed motor 1 and the transmission shaft 30 of a corresponding group of the actuators 3 to realize power transmission.

[0024] In this embodiment, only one double-headed motor 1 is required, and two transmission mechanisms 5 are used to connect the two output shafts 10 of the double-headed motor 1 to the transmission shafts 30 of the two groups of actuators 3 in a one-to-one correspondence. As a result, the output shafts 10 at different ends of the double-headed motor 1 can output power to drive the transmission shafts 30 of different groups of actuators 3 to rotate. The transmission shafts 30 then drive the rope drum assemblies 32 mounted on the transmission shafts 30 to rotate synchronously, thereby synchronously retracting and releasing the load ropes 34 of the same group of actuators 3, achieving balanced lifting and lowering of the curtain body 9 with good synchronization. Only one double-headed motor 1 is required to drive two groups of actuators 3 to achieve separate lifting and lowering control of two different parts of the curtain body 9, effectively simplifying the structure of the drive device, facilitating assembly and drive control, and reducing cost. During actual drive control, according to needs, the double-headed motor 1 can output power only from the output shaft 10 at one end, or the output shafts 10 at both ends can output power simultaneously. In specific applications, the electric curtain can be a two-section honeycomb curtain, sun and moon curtain, etc., in which the curtain body 9 is divided into two sections, the upper and lower sections, and the lifting of the two sections can be controlled separately.

[0025] In an optional embodiment of the present invention, Figures 1 to 4 As shown, at least two rope drum assemblies 32 of each set of the actuators 3 are respectively arranged at opposite ends of the double-headed motor 1. In this embodiment, by arranging the rope drum assemblies 32 of each set of the actuators 3 at opposite ends of the double-headed motor 1, when assembling the electric curtain, the double-headed motor 1 can be placed in the middle section of the upper beam 8, while the rope winding assemblies 32 are located on the upper beam 8 at positions relatively close to the ends, thereby making reasonable use of the internal space of the upper beam 8.

[0026] In an optional embodiment of the present invention, Figure 3 and Figure 4 As shown, the transmission mechanism 5 includes a driving gear 50 assembled on the output shaft 10 and fixed circumferentially relative to the output shaft 10, and a driven gear 52 sleeved on the corresponding transmission shaft 30 and fixed circumferentially relative to the transmission shaft 30. The driving gear 50 meshes with the driven gear 52. This embodiment uses a gear set to achieve power transmission between the output shaft 10 and the transmission shaft 30, resulting in a simple structure and smooth and reliable transmission.

[0027] In an optional embodiment of the present invention, Figures 1 to 4As shown, the transmission mechanism 5 also includes a box 54 for accommodating the driving gear 50 and the driven gear 52. The box 54 is provided with a first chamber 540 for positioning and accommodating the driving gear 50 and a second chamber 542 for positioning and accommodating the driven gear 52 and communicating with the first chamber 540. The wall of the first chamber 540 adjacent to the double-headed motor 1 is provided with a first through-hole 541 for the output shaft 10 to pass through the first chamber 540. The walls of the second chamber 542 on opposite sides are provided with second through-holes 543 coaxially arranged with each other and for the transmission shaft 30 to pass through. In this embodiment, by further providing a box to accommodate the driving gear 50 and the driven gear 52, the transmission mechanism 5 can be modularized for easy manufacturing and assembly. In specific implementation, the box 54 can be formed by fastening the main box body and the box cover.

[0028] In an optional embodiment of the present invention, Figures 1 to 4 As shown, the transmission shafts 30 belonging to the two groups of the actuators 3 are symmetrically arranged on opposite sides of the double-headed motor 1, the first chamber 540 is located in the middle of the box body 54, and a second chamber 542 is provided on opposite sides of the first chamber 540. In this embodiment, by symmetrically arranging the transmission shafts 30 on opposite sides of the double-headed motor 1, the first chamber 540 is also arranged in the middle of the box body 54, and a second chamber 542 is provided on opposite sides of the first chamber 540. Therefore, when assembling, one of the second chambers 542 is selected to assemble the driven gear 52 according to the position of the transmission shaft 30 corresponding to the transmission mechanism 5, thereby improving the compatibility of the box body 54 and facilitating the reduction of manufacturing costs. Moreover, the increase in the width of the box body 54 is also conducive to abutting and fixing with the inner walls on opposite sides of the upper beam 8 (see Figure 4 ).

[0029] In an optional embodiment of the present invention, Figures 1 to 5As shown, the other side wall of the first chamber 540 away from the double-headed motor 1 is further provided with an axial hole 544 coaxial with the first through-hole 541, and the opposite ends of the driving gear 50 each protrude to form a first shaft 501, and the two first shafts 501 are respectively pivoted in the first through-hole 541 and the axial hole 544. A first coupling hole 503 corresponding to the driving gear 50 and the first shaft 501 at both ends is opened at the axis center of the driving gear 50, and the output shaft 10 is correspondingly provided in the first coupling hole 503 and is relatively fixed to the hole wall of the first coupling hole 503 in the circumferential direction. In this embodiment, the first through-holes 541 and the shaft holes 544 are respectively formed on the opposite side walls of the first chamber 540 so that the first shafts 501 formed on the opposite ends of the driving gear 50 can be pivotally mounted respectively, thereby realizing the assembly of the driving gear 50. The first coupling hole 503 provided on the driving gear 50 can well realize the transmission connection with the output shaft 10. In a specific implementation, axial ribs can be correspondingly protruded on the hole wall of the first coupling hole 503 to engage with the corresponding axial grooves provided on the output shaft 10 to realize circumferential fixation.

[0030] In an optional embodiment of the present invention, Figures 1 to 5 As shown, the driven gear 52 has two second shafts 521 protruding from opposite ends thereof. The two second shafts 521 are pivotally mounted in second through-holes 543 formed on opposite side walls of the second chamber 542. A second coupling hole 523 is formed at the axis of the driven gear 52, corresponding to the second shafts 521 at both ends. The transmission shaft 30 passes through the second coupling holes 523 and is circumferentially fixed to the walls of the second coupling holes 523. In this embodiment, the driven gear 52 is assembled by pivoting the second shafts 521 protruding from opposite ends thereof into the second through-holes 543 formed on opposite side walls of the second chamber 542. The driven gear 52 can also be connected to the transmission shaft 30 through the second coupling holes 523. In a specific implementation, an axial rib may be formed on the wall of the second coupling hole 523 to engage with the axial groove correspondingly provided on the transmission shaft 30 to achieve circumferential fixation.

[0031] In an optional embodiment of the present invention, Figure 4 and Figure 5As shown, a first limiting protrusion 546 protrudes from the wall of the first chamber 540 to axially abut the end face of the driving gear 50; a second limiting protrusion 548 protrudes from the wall of the second chamber 542 to axially abut the end face of the driven gear 52. In this embodiment, by forming first and second limiting protrusions 546 and 548 on the walls of the first and second chambers 540 and 542, respectively, these protrusions 546 and 548 can axially abut opposite ends of the driving gear 50 and opposite ends of the driven gear 52, respectively, thereby achieving axial positioning of the driving gear 50 and the driven gear 52. In a specific implementation, the first and second limiting protrusions 546 and 548 can each be in the form of a closed ring or a plurality of arcuate ribs distributed along a circumference.

[0032] In an optional embodiment of the present invention, Figure 3 and Figure 4 As shown, the rope drum assembly 32 includes a support base 320, a rope drum 322 pivotally mounted on the support base 320 at opposite ends by means of ball bearings 321, and a cover 324 covering the support base 320. The support base 320 and the cover 324 cooperate to form a storage space for the rope drum 322. Opposite ends of the rope drum 322 each protrude to form a shaft tube 3220. The ball bearing 321 is sleeved on the shaft tube 3220, with the inner ring 3210 circumferentially fixed relative to the shaft tube 3220. The outer ring 3212 of the ball bearing 321 is correspondingly received in the pivot groove 3200 of the support base 320, and the drive shaft 30 passes through the inner hole of the shaft tube 3220. In this embodiment, by using ball bearings 321 to assemble the rope drum 322, the rotational resistance of the rope drum 322 is reduced, which is conducive to improving driving efficiency.

[0033] In an optional embodiment of the present invention, Figures 1 to 4 As shown, the rope drum assemblies 32 of the two groups of actuators 3 are arranged at the same position in the width direction of the curtain body 9. The support bases 320 and the cover bodies 324 of the two rope drum assemblies 32 located at the same position are connected to each other in a one-to-one correspondence. This embodiment allows the two rope drum assemblies 32 located at the same position to be modularly integrated, and the support bases 320 and cover bodies 324 of the two can be integrally formed, which facilitates manufacturing and assembly and reduces costs.

[0034] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can make many variations without departing from the creative purpose of the present invention and the scope of protection of the claims, which all fall within the scope of protection of the present invention.

Claims

1. A driving device for an electric curtain, comprising: A double-ended motor with an output shaft at each opposite end; Characterized in that, the driving device further comprises: Two groups of actuators driven one-to-one by the two output shafts of the double-headed motor, each group of actuators comprising a transmission shaft arranged parallel to the output shaft of the double-headed motor, at least two rope drum assemblies sleeved on the transmission shaft and fixed relative to the transmission shaft in the circumferential direction, and at least two load ropes wound one-to-one around the corresponding rope drum assemblies, the load ropes of the actuators in the same group being connected to the same height position of the curtain body, while the load ropes of the actuators in different groups being connected to different height positions of the curtain body; and Two transmission mechanisms are respectively arranged between each output shaft of the double-headed motor and the transmission shaft of a corresponding group of the actuators to realize power transmission.

2. The driving device for electric curtains according to claim 1, characterized in that: At least two of the rope drum assemblies of each group of the actuators are correspondingly arranged at opposite ends of the double-headed motor.

3. The driving device for electric curtains according to claim 1 or 2, characterized in that: The transmission mechanism includes a driving gear assembled on the output shaft and fixed relative to the output shaft in the circumferential direction, and a driven gear sleeved on the corresponding transmission shaft and fixed relative to the circumferential direction of the transmission shaft, and the driving gear meshes with the driven gear.

4. The driving device for electric curtains according to claim 3, characterized in that: The transmission mechanism also includes a box for accommodating the driving gear and the driven gear, wherein a first chamber for positioning and accommodating the driving gear and a second chamber for positioning and accommodating the driven gear and connected to the first chamber are provided in the box, a first through-hole for the output shaft to pass through the interior of the first chamber is provided on a side wall of the first chamber adjacent to the double-headed motor, and second through-holes are provided on opposite side walls of the second chamber that are coaxially arranged with each other and for the transmission shaft to pass through.

5. The driving device for electric curtains according to claim 4, characterized in that: The transmission shafts belonging to the two groups of the actuators are symmetrically arranged on opposite sides of the double-headed motor. The first chamber is located in the middle of the box body and a second chamber is provided on each opposite side of the first chamber.

6. The driving device for electric curtains according to claim 4, characterized in that: The other side wall of the first chamber away from the double-headed motor is further provided with an axial hole coaxial with the first through-hole, and the opposite ends of the driving gear each protrude to form a first shaft rod, and the two first shaft rods are respectively pivoted in the first through-hole and the axial hole. A first coupling hole corresponding to the driving gear and the first shaft rods at both ends is opened at the axis center of the driving gear, and the output shaft is correspondingly provided in the first coupling hole and is relatively fixed to the hole wall of the first coupling hole in the circumferential direction.

7. The driving device for electric curtains according to claim 4, characterized in that: The opposite ends of the driven gear each protrude to form a second shaft rod, and the two second shaft rods are respectively pivoted in the second through-holes opened on the opposite side walls of the second chamber. A second coupling hole corresponding to the driven gear and the second shaft rods at both ends is opened at the axis center of the driven gear. The transmission shaft passes through the second coupling hole and is relatively fixed to the hole wall of the second coupling hole in the circumferential direction.

8. The driving device for electric curtains according to claim 4, characterized in that: A first limiting protrusion protrudes from the cavity wall of the first cavity to abut against the end face of the driving gear in the axial direction; a second limiting protrusion protrudes from the cavity wall of the second cavity to abut against the end face of the driven gear in the axial direction.

9. The driving device for electric curtains according to claim 1 or 2, characterized in that: The rope drum assembly includes a support seat, a rope drum pivotally mounted on the support seat at opposite ends by means of ball bearings, and a cover body covering the support seat. The support seat and the cover body cooperate to form a storage space for accommodating the rope drum. The opposite ends of the rope drum each protrude to form a shaft tube. The ball bearing is sleeved on the shaft tube and the inner ring is relatively fixed to the shaft tube in the circumferential direction. The outer ring of the ball bearing is correspondingly accommodated in the pivot groove of the support seat, and the transmission shaft passes through the inner hole of the shaft tube.

10. The driving device for electric curtains according to claim 9, characterized in that: The rope drum assemblies of the actuators belonging to two groups are arranged at the same position in the width direction of the curtain body, and the support seats and the cover bodies of the two rope drum assemblies arranged at the same position are connected into one body in a one-to-one correspondence.

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