Transmission structure of electric folding door and window
By adding a differential component and a variable pitch design to the surface of the screw rod, the problems of jamming and twisting during the flattening process of folding louvers are solved, realizing the smooth operation and self-locking function of electric folding doors and windows, and reducing the power requirements of the motor.
Patent Information
- Application Number
- CN202511425715.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2025-11-11
AI Technical Summary
Existing folding blinds are difficult to flatten using linear drive force, which requires the cooperation of multiple parts for transmission performance, increasing costs and reducing work efficiency.
A differential component is added to the surface of the screw rod to achieve variable speed drive of the screw rod, ensuring folding synchronization and smoothness. A variable pitch screw rod and a vertically mounted slider structure are adopted to reduce friction and mechanical interference. It is designed to start in stages to reduce peak load.
It achieves coordinated and smooth movement of folding doors and windows, reduces operating noise and mechanical vibration, reduces motor power requirements, ensures self-locking function and safety performance, and reduces manufacturing costs.
Smart Images
Figure CN120925735A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of folding door and window technology, and in particular to a transmission structure for an electric folding door and window. Background Technology
[0002] Folding blinds, also known as "folding Venetian blinds" or "folding Venetian blinds," are a special structure for sun shading, light adjustment, and privacy protection. They combine the slat adjustment function of traditional Venetian blinds with the opening and closing mechanism of folding doors / windows. Their core feature is that multiple slats or slat groups are connected by a linkage mechanism, allowing them to be folded and unfolded synchronously like an accordion or screen, achieving flexible opening and closing over a large area.
[0003] In existing technologies, most folding blinds are manually folded. This is because the process of folding blinds from folding to flattening is difficult to achieve with a linear driving force. At the moment of flattening, the direction of the driving force must be opposite to the direction of movement. The transmission performance generated by this structure requires the cooperation of multiple parts, and assembling all the cooperating parts increases the cost. In actual use, the structure also needs to be further processed and improved, which increases the number of processes and reduces work efficiency. To address this, the inventor has proposed a transmission structure for electric folding doors and windows to solve the aforementioned technical problems of improving manual folding blinds. Summary of the Invention
[0004] To overcome the shortcomings mentioned above, the invention aims to provide a technical solution that can solve the above problems.
[0005] A transmission structure for an electric folding door and window includes a first folding rod, a second folding rod, and a spiral rod. One end of the spiral rod is an input shaft for connecting an external drive motor. Both the spiral rod and the input shaft are supported by a support base. The surface of the support base is respectively equipped with a track and a guide rail. The first folding rod and the second folding rod are respectively provided with a pivot. The first folding rod and the second folding rod are connected by a movable hinge and can be folded. The surface of the spiral rod is provided with a differential component for assisting in forming a speed difference during folding. This structure adds a differential component to the surface of the auger rod to assist in creating a speed difference during folding. It is a core innovative design for folding synchronization, smooth movement, and driving force distribution. This structure solves the problems of jamming, twisting, and uneven force that are common in traditional folding doors and windows during opening / closing. It ensures that the door panel or window sash can move in a coordinated and smooth manner. When the drive motor drives the auger rod to rotate, the differential component will drive different positions to move at different speeds or at different times according to its position or structural characteristics on the auger rod. This makes the folding units closer to the drive end and farther away from the drive end move at different speeds, thereby forming a reasonable speed gradient during folding. This prevents pulling, squeezing, or jamming caused by the same speed, and achieves the effect of synchronous folding. The folding unit can unfold or fold in a coordinated manner according to the preset geometric relationship to form a smooth folding curve. Under the progressive drive of the differential component, the instantaneous high load is eliminated, and the operating noise and mechanical vibration are reduced. Driven by a motor, the screw rod drives the differential component to drive the door and window blades to run or move. The blades can be unfolded and flattened by changing the position of the differential component. This structure improves upon the traditional method of starting folding units simultaneously, which requires a large starting torque. The improved differential component allows the units to start sequentially, staggering peak loads, so that the motor can run smoothly without excessive power. This ensures that one motor can drive the folding and unfolding processes.
[0006] Furthermore, the differential assembly includes a reversing slider and a translating slider, with rollers mounted at one end of both the reversing slider and the translating slider, and the rollers at one end of the reversing slider and the translating slider respectively mounted on the surface of the track and the guide rail. The directional slider and the translation slider work together with the screw rod to achieve active differential drive. The directional slider and the translation slider convert the rotational motion of the screw rod into variable speed linear motion. When the screw rod rotates, the directional slider moves along its axial direction. This structure adopts the transmission method of a bench vise, which uses screw transmission to drive the nut to move the directional slider and the translation slider, thereby completing the conversion of the rotational motion of the screw rod into the linear motion of the directional slider and the translation slider. When the directional slider and the translation slider move, they work together with the rollers on their surfaces to move along the surfaces of the track and guide rail, which reduces friction and prevents the directional slider and translation slider from getting stuck or stalling.
[0007] Furthermore, both the reversing slider and the translation slider are mounted on the surface of the screw rod, with a gap between their mounting positions. This design is the physical basis for achieving multi-point independent drive and creating speed differences. The reversing slider closer to the motor has a larger pitch, resulting in a faster speed, while the translation slider further away has a smaller pitch, resulting in a slower speed. The gap ensures that this difference can exist independently, and the mounting gap reduces screw rod deformation. Due to the uniform load distribution, the straightness and rigidity of the screw rod can be maintained to the maximum extent, ensuring smooth operation and avoiding jamming caused by screw rod bending.
[0008] Furthermore, the surfaces of the first folding rod and the second folding rod are respectively provided with a rotatable pivot and a folding wheel. One end of the pivot passes through the surface of the first folding rod and is connected to the surface of the translation slider. One end of the folding wheel passes through the surface of the second folding rod and is connected to the support base. When the auger rotates, it drives the directional slider and the translation slider to move. The pivot and folding wheel play a role in adjusting the folding angle and the stability of operation. Since the pivot and folding wheel can rotate with their own fixed axis as the center point, when the first folding rod and the second folding rod are folded, the pivot and folding wheel avoid jamming during folding by rotating. This structure transforms the linear motion of the auger into a compound folding action of the door and window sash, thus playing an auxiliary folding role.
[0009] Furthermore, the directional slider and the translation slider are installed on the surface of the helical rod in a mutually perpendicular manner. The unfolding / folding action of the folding door and window is essentially a fan-shaped motion. The movement direction of each folding rod is not a simple straight line, but a combination of radial and tangential components. The vertical installation allows the output direction of the translation slider to be directly aligned with the movement direction required for folding, reducing intermediate conversion links, improving transmission efficiency, and avoiding motion interference by being mutually perpendicular. If the two sliders are installed in parallel, the connection or movement trajectory between them is prone to spatial conflict. The vertical layout offsets the movement planes of the two in three-dimensional space, fundamentally avoiding mechanical interference and reducing the probability of conflict.
[0010] Furthermore, the surface of the second folding rod is provided with a door / window reset shaft, which has a raised structure. When the reversing slider moves to the installation position of the door / window reset shaft, the force of the helical rod causes the reversing slider to continue sliding, thereby fitting against the surface of the door / window reset shaft. The reversing slider continuously applies pressure to the door / window reset shaft, thereby flattening the door / window. When the flattened door / window is in the state of horizontal unfolding of the first and second folding rods, it reaches the state of mechanical dead point, achieving a self-locking effect.
[0011] Furthermore, the track and guide rail are of the same length as the screw rod; the length of the screw rod determines the stroke of the translation slider and the direction-changing slider, while the guide rail and track are the bearing and guiding tracks for the movement of the direction-changing slider and the translation slider. The consistent length ensures complete support and precise guidance within the stroke, thus stabilizing the rigidity and stability of the overall structure.
[0012] Furthermore, the screw rod is a variable pitch screw rod. Traditional equal pitch screw rods result in all sliders moving at the same speed, creating a situation where the outer units do not move fast enough and the inner units are dragged along, which can easily cause structural distortion or stress concentration. The variable pitch design solves this problem. By using different pitches in different sections of the variable pitch screw rod, different linear speeds can be obtained at the same rotation speed when combined with directional and translational sliders, achieving the effect of naturally slowing down the speed until a smooth stop is achieved.
[0013] Furthermore, a screw slot is provided on one side of the screw rod. The screw slot is used to eliminate the force exerted by the directional slider or the translation slider on the surface of the screw rod. When the directional slider or the translation slider moves to the screw slot, since there is no driving force generated by the rotation of the screw rod in the screw slot, the directional slider or the translation slider can stay in the position of the screw slot. When this structure is used together with the variable pitch screw rod, it can achieve the effect of forming a speed difference, which facilitates the coordination of the blade unfolding or retracting process.
[0014] Compared with the prior art, the beneficial effects of the present invention are: by adding a differential component to the surface of the spiral rod to assist in forming a speed difference during folding, the problems of jamming, twisting and uneven force that are common in traditional folding doors and windows during opening / closing are solved, ensuring that the door panel or window sash can move in a coordinated and smooth manner, solving the problem of electric drive mode of folding doors and windows, and enabling the doors and windows to have a self-locking function under the action of motor force, thus increasing good safety performance. Under the progressive drive of the differential component, instantaneous high load is eliminated, and the operating noise and mechanical vibration are reduced. Driven by a motor, the screw rod drives the differential component to drive the door and window blades to run or move. By changing the position of the differential component, the blades can be retracted and flattened, solving the problem of traditional manual folding blinds. The traditional method of starting folding units simultaneously has been improved. This differential component can be designed to start the units one by one, staggering the peak load, so that the motor can run smoothly without being equipped with excessive power. This ensures that the folding and unfolding process can be completed by driving a single motor, reducing manufacturing costs. Attached Figure Description
[0015] Figure 1 This is a front view of the retracted state of the transmission structure of an electric folding door / window. Figure 2 This is another front view of the retracted state of the transmission structure of an electric folding door / window; Figure 3 This is a 3D view of the transmission structure of an electric folding door / window in its retracted state. Figure 4 yes Figure 3 A magnified view of part A in the diagram; Figure 5 yes Figure 3 A magnified view of part B in the diagram; Figure 6 This is a front view of the unfolded state of the transmission structure of an electric folding door / window; Figure 7 This is a rear view of the transmission structure of an electric folding door / window in its unfolded state. Figure 8 This is a front view of the fully unfolded transmission structure of an electric folding door / window. Figure 9 This is a front view of the transmission structure of an electric folding door / window in a semi-open / semi-closed state; Figure 10 This is a rear view of the transmission structure of an electric folding door / window in a semi-open / semi-closed state. In the diagram: First folding rod-1, Second folding rod-2, Screw rod-3, Input shaft-4, Support base-5, Track-6, Guide rail-7, Movable hinge-8, Directional slider-9, Translation slider-10, Roller-11, Rotating shaft-12, Folding wheel-13, Door and window reset shaft-14, Screw empty space-15. Detailed Implementation
[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0017] For this embodiment, please refer to Figures 1-10 The transmission structure of an electric folding door and window specifically implemented includes a first folding rod 1, a second folding rod 2, and a spiral rod 3. One end of the spiral rod 3 is an input shaft 4 for connecting an external drive motor. Both the spiral rod 3 and the input shaft 4 are supported by a support base 5. The surface of the support base 5 is respectively equipped with a track 6 and a guide rail 7. The first folding rod 1 and the second folding rod 2 are respectively provided with a rotating shaft. The first folding rod 1 and the second folding rod 2 are connected by a movable hinge 8 and can be folded. The surface of the spiral rod 3 is provided with a differential component for assisting in forming a speed difference during folding. This structure adds a differential component to the surface of the spiral rod 3 to assist in creating a speed difference during folding. It is a core innovative design for folding synchronization, smooth movement and driving force distribution. This structure solves the problems of jamming, twisting and uneven force that are common in traditional folding doors and windows during opening / closing. It ensures that the door panel or window sash can move in a coordinated and smooth manner. When the drive motor drives the spiral rod 3 to rotate, the differential component will drive different positions to move at different speeds or at different times according to its position or structural characteristics on the spiral rod. This makes the folding units closer to the drive end and farther away from the drive end move at different speeds, thereby forming a reasonable speed gradient during folding. This prevents pulling, squeezing or jamming caused by the same speed, and achieves the effect of synchronous folding. The folding unit can unfold or retract in a coordinated manner according to the preset geometric relationship to form a smooth folding curve. Under the progressive drive of the differential component, the instantaneous high load is eliminated, and the operating noise and mechanical vibration are reduced. Driven by a motor, the screw rod 3 drives the differential component to drive the door and window blades to run or move. The blades can be retracted and flattened by changing the position of the differential component. This structure improves upon the traditional method of starting folding units simultaneously, which requires a large starting torque. The improved differential component allows the units to start sequentially, staggering peak loads, so that the motor can run smoothly without excessive power. This ensures that one motor can drive the folding and unfolding process. The first folding rod 1 and the second folding rod 2 of this structure are not the same type of rod. They refer to the folding obstruction itself. For example, when applied to doors and windows, it is the door and window itself. If applied to blinds, it is the blind itself. This folding system is suitable for folding two doors and windows, as well as three or more doors and windows. Through the folding / flattening action, it achieves the function of opening / closing / obstruction.
[0018] The differential assembly includes a reversing slider 9 and a translating slider 10. Rollers 11 are installed at one end of both the reversing slider 9 and the translating slider 10. The rollers 11 at one end of the reversing slider 9 and the translating slider 10 are respectively installed on the surfaces of the track 6 and the guide rail 7. The directional slider 9 and the translation slider 10 cooperate with the screw rod 3 to achieve active differential drive. The directional slider 9 and the translation slider 10 convert the rotational motion of the screw rod 3 into variable speed linear motion. When the screw rod 3 rotates, the directional slider 9 moves along its axial direction. This structure adopts the transmission method of a bench vise, which drives the directional slider 9 and the translation slider 10 to move through the screw drive, thereby completing the conversion of the rotational motion of the screw rod 3 into the linear motion of the directional slider 9 and the translation slider 10. When the directional slider 9 and the translation slider 10 move, they cooperate with the rollers 11 on their surfaces to move along the surfaces of the track 6 and the guide rail 7 respectively, which reduces the friction of movement and prevents the directional slider 9 and the translation slider 10 from getting stuck or stuck when moving.
[0019] Both the reversing slider 9 and the translation slider 10 are mounted on the surface of the screw rod 3. There is a gap between the mounting positions of the reversing slider 9 and the translation slider 10. This design is the physical basis for realizing multi-point independent drive and forming speed difference. The reversing slider 9, which is closer to the motor, has a larger pitch, thus creating a faster speed effect. The translation slider 10, which is farther away, has a smaller pitch, thus creating a slower speed effect. The gap ensures that this difference can exist independently. Moreover, the installation gap reduces the deformation of the screw rod. Due to the uniform load distribution, the straightness and rigidity of the screw rod 3 can be maintained to the maximum extent, ensuring smooth operation and avoiding jamming caused by bending of the screw rod 3.
[0020] The surfaces of the first folding rod 1 and the second folding rod 2 are respectively provided with a rotatable pivot 12 and a folding wheel 13. One end of the pivot 12 passes through the surface of the first folding rod 1 and is connected to the surface of the translation slider 10. One end of the folding wheel 13 passes through the surface of the second folding rod 2 and is connected to the support base 5. When the screw rod 3 rotates, it drives the direction-changing slider 9 and the translation slider 10 to move. The rotating shaft 12 and the folding wheel 13 play a role in adjusting the folding angle and the stability of operation. Since the rotating shaft 12 and the folding wheel 13 can rotate with their own fixed axis as the center point, when the first folding rod 1 and the second folding rod 2 are folded, the rotating shaft 12 and the folding wheel 13 avoid jamming during folding by rotating. This structure transforms the linear motion of the screw rod 3 into a compound folding action of the door and window sash, which plays a role in assisting folding.
[0021] The directional slider 9 and the translation slider 10 are mounted on the surface of the spiral rod 3 in a mutually perpendicular manner. The unfolding / folding action of the folding door and window is essentially a fan-shaped motion. The movement direction of each folding rod is not a simple straight line, but a combination of radial and tangential components. The vertical installation allows the output direction of the translation slider 10 to be directly aligned with the movement direction required for folding, reducing intermediate conversion links, improving transmission efficiency, and avoiding motion interference by being mutually perpendicular. If the two sliders are installed in parallel, the connection or movement trajectory between them is prone to spatial conflict. The vertical layout offsets the movement planes of the two in three-dimensional space, fundamentally avoiding mechanical interference and reducing the probability of conflict.
[0022] The surface of the second folding rod 2 is provided with a door and window reset shaft 14, which has a raised structure. When the reversing slider 9 moves to the installation position of the door and window reset shaft 14, the force of the spiral rod 3 causes the reversing slider 9 to continue sliding, thereby fitting against the surface of the door and window reset shaft 14. The reversing slider 9 continuously applies pressure to the door and window reset shaft 14, thereby flattening the door and window. When the flattened door and window are in the state of horizontal unfolding of the first folding rod 1 and the second folding rod 2, they reach the state of mechanical dead point, achieving a self-locking effect.
[0023] The track 6 and guide rail 7 are the same length as the screw rod 3; the length of the screw rod 3 determines the stroke of the translation slider 10 and the direction-changing slider 9, while the guide rail 7 and track 6 are the bearing and guiding tracks for the movement of the direction-changing slider 9 and the translation slider 10. The consistent length ensures complete support and precise guidance within the stroke, thus stabilizing the rigidity and stability of the overall structure.
[0024] The screw rod 3 is a variable pitch screw rod. Traditional equal pitch screw rods result in all sliders moving at the same speed, creating a situation where the outer units do not move fast enough and the inner units are dragged along, which can easily cause structural distortion or stress concentration. The variable pitch design solves this problem. The variable pitch screw rod has different pitches in different sections, which, when combined with the directional slider 9 and the translation slider 10, can achieve different linear speeds at the same rotation speed, thus achieving the effect of naturally slowing down until a smooth stop is achieved.
[0025] A screw slot 15 is provided on one side of the screw rod 3. The screw slot 15 is used to eliminate the force exerted by the directional slider 9 or the translation slider 10 on the surface of the screw rod 3. When the directional slider 9 or the translation slider 10 moves to the screw slot 15, since there is no driving force generated by the rotation of the screw rod 3, the directional slider 9 or the translation slider 10 can stay in the position of the screw slot 15. When this structure is used together with the variable pitch screw rod, the effect of forming a speed difference can be achieved, which facilitates the coordination of the blade unfolding or retracting process.
[0026] The key design feature of this invention is that by adding a differential component to the surface of the spiral rod 3 to assist in forming a speed difference during folding, the problems of jamming, twisting, and uneven force that are common in traditional folding doors and windows during opening / closing are solved, ensuring that the door panel or window sash can move in a coordinated and smooth manner. Under the progressive drive of the differential component, the instantaneous high load is eliminated, and the operating noise and mechanical vibration are reduced. Driven by a motor, the screw rod 3 drives the differential component to drive the door and window blades to run or move. The blades can be retracted and flattened by changing the position of the differential component. The traditional method of starting folding units simultaneously has been improved. This differential component can be designed to start the units one by one, staggering the peak load, so that the motor can run smoothly without being equipped with excessive power. This ensures that the folding and unfolding processes can be completed by driving a single motor.
[0027] The operation process of this invention is as follows: the screw rod 3 is driven to rotate by an external motor. The deflecting slider 9 and the translation slider 10 are equipped with rollers 11, which are locked in corresponding slots. The rotation of the screw rod 3 drives the translation slider 10 to slide horizontally. One side of the screw rod 3 is a screw rod with different pitches to change the distance between the deflecting slider 9 and the translation slider 10. The other end of the screw rod 3 is a screw slot 15 area. When the translation slider 10 reaches the slot area of the screw rod, the screw rod no longer exerts force on the translation slider 10. At this time, the deflecting slider 9 will continue to slide under the force of the screw rod 3, thereby continuously applying pressure to the door and window reset shaft 14, so as to flatten the door and window. Conversely, when the screw rod 3 rotates in the opposite direction, the translation slider 10 is in the screw slot 15 area, where no force is applied to the slider. The directional slider 9 moves under the driving force of the screw rod 3 to push out the door and window. After being pushed to a certain position, the translation slider 10 moves out of the screw slot 15 and continues to translate the slider with the blades to complete the unfolding and flattening process.
[0028] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the inventive concept, and all such modifications and substitutions should be considered within the scope of protection of the present invention.
Claims
1. A transmission structure for an electric folding door / window, comprising a first folding rod, a second folding rod, and a spiral rod, one end of which is an input shaft for connecting an external drive motor. Both the spiral rod and the input shaft are supported by a support base. Tracks and guide rails are respectively mounted on the surface of the support base. The first and second folding rods are each provided with a rotating shaft. The first and second folding rods are connected by a movable hinge and can fold. The structure is characterized by: The surface of the screw is provided with a differential assembly to assist in creating a speed difference during folding.
2. The transmission structure of an electric folding door / window according to claim 1, characterized in that: The differential assembly includes a reversing slider and a translating slider. Rollers are installed at one end of both the reversing slider and the translating slider. The rollers at one end of the reversing slider and the translating slider are respectively installed on the surface of the track and the guide rail.
3. The transmission structure of an electric folding door / window according to claim 2, characterized in that: Both the direction-changing slider and the translation slider are mounted on the surface of the screw rod.
4. The transmission structure of an electric folding door / window according to claim 3, characterized in that: The surfaces of the first folding rod and the second folding rod are respectively provided with a rotatable pivot and a folding wheel. One end of the pivot passes through the surface of the first folding rod and is connected to the surface of the translation slider. One end of the folding wheel passes through the surface of the second folding rod and is connected to the support base.
5. The transmission structure of an electric folding door / window according to claim 4, characterized in that: The directional slider and the translation slider are mounted on the surface of the screw rod in a mutually perpendicular manner.
6. The transmission structure of an electric folding door / window according to claim 5, characterized in that: The surface of the second folding rod is provided with a door / window reset shaft.
7. The transmission structure of an electric folding door / window according to any one of claims 1-6, characterized in that: The track and guide rail are the same length as the screw rod.
8. The transmission structure of an electric folding door / window according to any one of claims 1-6, characterized in that: The screw is a variable pitch screw.
9. The transmission structure of an electric folding door / window according to any one of claims 1-6, characterized in that: A screw slot is provided on one side of the screw rod.