A lifting structure and a lifting window

Abstract

This invention discloses a lifting structure and a lifting window, comprising two lifting units arranged at intervals. Each lifting unit includes: a sprocket seat with a driving wheel and a driven wheel arranged sequentially along the front-to-back direction, the rotation axes of the driving wheel and the driven wheel extending in the left-to-right direction; a chain resting on the driving wheel and the driven wheel, with the front and rear ends of the chain hanging down and respectively connecting one side of the movable window sash and a balancing component; and a motor that rotates to drive the driving wheel. This invention increases the hanging distance between the two ends of the chain by using the spaced driving wheel and the driven wheel, preventing collisions and interference between the balancing component and the movable window sash. Moreover, while keeping the diameter and size of the driving wheel and the driven wheel constant, the connection distance between the two ends of the chain can be increased, reducing the space occupied within the window frame.

Description

Technical Field

[0001] This invention relates to the field of lifting structures for lifting windows, and particularly to a lifting structure and a lifting window. Background Technology

[0002] Automatic lifting windows on the market have fixed sashes and movable sashes that can move up and down. The movable sashes are often positioned on a chain, and the height of the movable sashes is adjusted by a sprocket drive to achieve the opening and closing of the lifting window. However, during use, the transmission structure located on the outside and inside sides of the movable sash is prone to contact and interference with the lifting window. In order to reduce the interference between the transmission structure and the lifting window, a larger diameter sprocket needs to be selected. However, a large diameter sprocket occupies the installation space of the window frame, reduces the window area, and also affects the overall appearance. Summary of the Invention

[0003] The purpose of this invention is to provide a lifting structure and a lifting window to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0004] The solution to the technical problem of this invention is:

[0005] A lifting structure includes two lifting units arranged at a distance from each other. Each lifting unit includes: a sprocket seat in which a driving wheel and a driven wheel are arranged sequentially along the front-back direction, and the rotation axes of the driving wheel and the driven wheel extend in the left-right direction; a chain that rests on the top side of the driving wheel and the driven wheel, with the front and rear ends of the chain hanging down; and a motor that drives the driving wheel to rotate.

[0006] This technical solution has at least the following beneficial effects: there is an installation distance between the driving wheel and the driven wheel; the chain overlaps and meshes with the driving wheel and the driven wheel arranged in parallel; the front end and the rear end of the chain are the pulling end and the damping end, respectively; the motor drives the driving wheel to rotate, so that the chain provides direct output force to the up and down position of the pulling end; at the same time, the driven wheel rotates under the drive of the chain and drives the damping end to move accordingly; the damping end can balance the torque borne by the motor and reduce the motor load; by setting the driving wheel and the driven wheel at intervals, this invention increases the drop distance between the two ends of the chain, preventing collisions and interference between the balancing component and the movable window sash; moreover, while keeping the diameter and size of the driving wheel and the driven wheel unchanged, the connection distance between the two ends of the chain can be increased, adapting to various different lift window structures, reducing space occupation, reducing the overall weight of the lift structure, and reducing safety hazards such as the window falling due to excessive weight of the lift structure.

[0007] As a further improvement to the above technical solution, the present invention also includes a balancing component, which comprises a pull rope, a movable pulley, and a tension spring. One end of the pull rope is connected to the rear end of the chain, and the other end of the pull rope extends downward past the movable pulley and upward. The upper end of the tension spring is connected to the movable pulley, and the lower end of the tension spring, the other end of the pull rope, and the sprocket seat are relatively fixed. The pulling end of the chain is connected to the movable window sash, and the damping end of the chain is connected to the front end of the pull rope. When the movable window sash moves downward, the gradually lengthening tension spring gradually increases the pulling force on the movable window. When the movable window sash moves upward, the gradually returning tension spring reduces the pulling force on the movable window sash. This reduces the load requirements of the motor on the movable window sash while using the gradually changing tension to balance and offset the driving force required to decelerate the movable window sash, improving the stability of the motor output. At the same time, the combination of the movable pulley and the traction rope reduces the extension and contraction range of the spring, reducing the occurrence of spring fatigue.

[0008] As a further improvement to the above technical solution, a balancing component is also included. The balancing component is a counterweight bar, the upper end of which is connected to the rear end of the chain. The front end of the chain is connected to the external movable window sash, and the rear end of the chain is connected to the counterweight bar. The counterweight bar can provide stable tension, reducing the load requirements of the motor on the movable window sash. The structure is simple and reliable.

[0009] As a further improvement to the above technical solution, the driving wheel is synchronously connected to the driving shaft, and the driven wheel is synchronously connected to the passive shaft. Both the driving shaft and the passive shaft are bearing-connected to the sprocket seat. The sprocket seat includes a first seat plate and a second seat plate spaced apart on the left and right sides. Both ends of the driving shaft and both ends of the passive shaft are rotatably connected to the first seat plate and the second seat plate, respectively. The sprocket seat and the motor are fixedly mounted on the external window frame. The driving shaft is bearing-connected to the sprocket seat, and the driven wheel is bearing-connected to the sprocket seat. The bearing connection ensures the rotational stability of the driving wheel and the driven wheel, reduces the swaying of the movable window sash and the balancing component, and simultaneously enables the motor to drive the driving wheel. Furthermore, the first seat plate and the second seat plate are separated, allowing the driving shaft and the passive shaft to be positioned at both ends, improving installation stability. At the same time, the space between the first seat plate and the second seat plate allows the chain to hang down, preventing interference between the chain and the sprocket seat.

[0010] As another improvement to the above technical solution, the present invention also includes an adjustable distance structure. The sprocket seat includes a fixed seat and a sliding seat arranged front and rear respectively. The driving wheel is rotatably connected to the fixed seat, and the driven wheel is rotatably connected to the sliding seat. The adjustable distance structure can adjust the front and rear position of the sliding seat, so that the sliding seat moves closer to or further away from the fixed seat. The fixed seat and the external window frame are relatively fixed. The adjustable distance structure can adjust the distance between the sliding seat and the fixed seat according to the thickness of the movable window sash and the positioning window sash, thereby changing the distance between the driving wheel and the driven wheel, improving applicability and range of use.

[0011] As a further improvement to the above technical solution, the adjustable distance structure includes a screw and a slide rail. The slide has a threaded channel extending forward and backward. The front end of the screw is rotatably connected to the fixed seat, and the rear end of the screw is threaded into and exits the threaded channel. The slide is slidably connected to the slide rail. One end of the screw is positioned on the fixed seat, and the other end passes through the threaded channel of the slide. When the screw rotates, the slide can move closer to or away from the fixed seat along the screw, thereby adjusting the distance between the driving wheel and the driven wheel and improving the applicability and range of use of the lifting structure.

[0012] This invention also provides a lift-up window, comprising a window frame, a fixed window sash, and the aforementioned lift-up structure. The fixed window sash is fixedly connected within the window frame, and the movable window sash is slidably connected within the window frame. A motor drives a drive wheel to rotate, causing the movable window sash to move upward and close the window frame, or causing the movable window sash to move downward and open the window frame, facilitating ventilation and use. Simultaneously, the slidable connection of the movable window sash to the window frame improves its aesthetics and operational stability.

[0013] As a further improvement to the above technical solution, the window frame includes a top frame and two side frames. The two side frames connect the left and right sides of the top frame. The sprocket seat and the motor are both located inside the top frame. A first chamber and a second chamber are separated within the side frames along the front-to-back direction. The two ends of the chain hang down from the top frame into the first chamber and the second chamber, respectively. The movable window sash is slidably connected to the side frames. The motor and sprocket seat are mounted on the top frame for easy lifting of the movable window sash. Furthermore, the first and second chambers within the side frames are connected to the inner cavity of the top frame, allowing the two ends of the chain to hang down directly from the sprocket seat. The sliding range of the movable window sash corresponds to the position of the first chamber. The balancing component is located in the second chamber to prevent interference between the movable window sash and the balancing component. Simultaneously, it limits the range of motion of the balancing component, reducing swaying and improving service life and operational stability.

[0014] As another improvement to the above technical solution, the present invention also includes an electric screen window. The window frame is divided into an outdoor side and an indoor side along its front-to-back position. The movable window sash is located on the outdoor side, and a crossbeam is connected to the top of the fixed window sash, extending rearward. The electric screen window includes a drive unit, a roller, a screen curtain, and a lower crossbeam. The roller is located at the top of the indoor side and connected to the window frame in the left-right direction. The screen curtain is wound around the roller, and the lower crossbeam is connected to the lower side of the screen curtain. The drive unit can rotate to drive the roller, causing the lower crossbeam to abut against the crossbeam downwards. When the user lowers the movable window sash, the electric screen window can block the upper half of the window width while allowing ventilation, improving functionality. Simultaneously, the electric screen window and the movable window sash are located on the indoor and outdoor sides respectively, preventing interference between them and facilitating user control and disassembly of the electric screen window, thus improving the user experience.

[0015] As a further improvement to the above technical solution, the present invention also includes a balancing component, which comprises a pull rope, a movable pulley, and a tension spring. One end of the pull rope is connected to the rear end of the chain, and the other end of the pull rope extends downward past the movable pulley and upward to connect to the window frame. The upper end of the tension spring is connected to the movable pulley, and the lower end of the tension spring is connected to the window frame. The tension spring provides damping when the movable window moves up and down, thereby reducing the load on the motor during opening or braking, improving the stability of the motor output. Furthermore, the lower end of the tension spring, the end of the pull rope away from the chain, and the sprocket seat are all fixed inside the window frame, improving aesthetics. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of the present invention, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0017] Figure 1 This is a side view of a vertical cross-sectional view of a lifting window provided in an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 Enlarged view of a portion of area A in the middle;

[0019] Figure 3 This is a structural diagram of a lifting structure provided in an embodiment of the present invention;

[0020] Figure 4 This is a top view of a horizontal cross-sectional view of a lifting window provided in an embodiment of the present invention.

[0021] In the attached diagram: 100-Window frame, 110-Lifting structure, 120-Movable window sash, 130-Fixed window sash, 131-Horizontal beam, 141-Indoor side, 142-Outdoor side, 201-Top frame, 210-Sprocket seat, 220-Driving wheel, 230-Driven wheel, 240-Chain, 251-Roller, 252-Sheer curtain, 253-Lower crossbar, 310-Driving shaft, 320-Driven shaft, 330-First seat plate, 340-Second seat plate, 350-Connecting bridge, 361-Base, 362-Cover, 401-Side frame, 410-First chamber, 420-Second chamber, 430-Roller, 440-First limiting component, 450-Second limiting component, 460-Anti-sway space. Detailed Implementation

[0022] The following will clearly and completely describe the concept, specific structure, and technical effects of the present invention in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. Furthermore, all connection relationships mentioned herein do not simply refer to direct connection of components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in the present invention can be combined interactively without contradicting each other.

[0023] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0024] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0025] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0026] Reference Figure 1 and Figure 2 The lifting structure 110 includes two lifting units arranged at intervals from left to right. Each lifting unit includes a sprocket seat 210, a chain 240, and a motor. A drive wheel 220 and a driven wheel 230 are arranged sequentially on the sprocket seat 210 along the front-to-back direction. The rotation axes of the drive wheel 220 and the driven wheel 230 extend in the left-to-right direction. The chain 240 rests on the drive wheel 220 and the driven wheel 230. The front and rear ends of the chain 240 hang down and are respectively connected to one side of the movable window sash 120 and the balance component. The motor rotates to drive the drive wheel 220.

[0027] Specifically, there is an installation distance between the drive wheel 220 and the driven wheel 230, the chain 240 overlaps and meshes with the drive wheel 220 and the driven wheel 230 which are parallel to each other, and the movable window sash 120 is connected to the front end of the chain 240, and the balancing member is connected to the rear end of the chain 240.

[0028] In use, the motor drives the drive wheel 220 to rotate, and the chain 240 provides direct tension to the movable window sash 120, enabling the movable window sash 120 to move up and down. At the same time, the driven wheel 230 rotates under the drive of the chain 240 and drives the balancing component to move accordingly. By setting the drive wheel 220 and driven wheel 230 at intervals, the present invention increases the vertical distance between the two ends of the chain 240, preventing collisions and interference between the balancing component and the movable window sash 120. Moreover, while keeping the diameter and size of the drive wheel 220 and driven wheel 230 unchanged, the connection distance between the two ends of the chain 240 can be increased, reducing the overall weight of the lifting structure 110 and reducing safety hazards such as the window falling due to excessive weight of the lifting structure 110.

[0029] Furthermore, both the drive wheel 220 and the driven wheel 230 are double sprockets, and the chain 240 is a double chain 240, which improves the load-bearing capacity and enhances the load-bearing capacity, making it suitable for heavy-duty lifting windows and improving the stability of the motor drive process.

[0030] Furthermore, referring to Figure 3 The driving wheel 220 is synchronously connected to the driving shaft 310, and the driven wheel 230 is synchronously connected to the passive shaft 320. Both the driving shaft 310 and the passive shaft 320 are connected to the sprocket seat 210 by bearings. The output shaft of the motor is synchronously connected to the driving shaft 310.

[0031] Specifically, the sprocket seat 210 and the motor are fixedly mounted on the external window frame 100. The drive shaft 310 is bearing-connected to the sprocket seat 210, and the driven wheel 230 is bearing-connected to the sprocket seat 210. The output shaft of the motor drives the drive shaft 310 to rotate, thereby driving the drive wheel 220 to rotate. The bearing connection ensures the rotational stability of the drive wheel 220 and the driven wheel 230, reducing the swaying of the movable window sash 120 and the balancing components, while simultaneously enabling the motor to drive the drive wheel 220. In fact, the drive wheel 220 and the drive shaft 310 can be connected by a key to achieve synchronous rotation. Similarly, the driven shaft 320 and the drive shaft 310 can also be installed by a key connection. The drive shaft 310 and the output shaft can be connected by a coupling.

[0032] Furthermore, the sprocket seat 210 includes a first seat plate 330 and a second seat plate 340 spaced apart on the left and right. Both ends of the drive shaft 310 and both ends of the driven shaft 320 are rotatably connected to the first seat plate 330 and the second seat plate 340, respectively. At least one connecting bridge 350 is connected between the first seat plate 330 and the second seat plate 340.

[0033] Specifically, the first base plate 330 and the second base plate 340 are separated, allowing the drive shaft 310 and the driven shaft 320 to be positioned at both ends, improving installation stability. At the same time, the gap between the first base plate 330 and the second base plate 340 allows the chain 240 to hang down, preventing interference between the chain 240 and the sprocket seat 210. Furthermore, the two ends of the connecting bridge 350 are respectively connected to the first base plate 330 and the second base plate 340, making the first base plate 330 and the second base plate 340 relatively fixed, ensuring the parallelism between the first base plate 330 and the second base plate 340, and facilitating the installation of the drive shaft 310 and the driven shaft 320.

[0034] In practice, there can be multiple connecting bridges 350 to improve the connection strength between the first base plate 330 and the second base plate 340, as long as the extension position of the connecting bridge 350 avoids the drooping position of the chain 240. Moreover, in this embodiment, two connecting bridges 350 connect the first base plate 330 and the second base plate 340. The two connecting bridges 350 are located between the chains 240 on both sides. During installation, it is not necessary to thread the chain 240 between two adjacent connecting bridges 350, which facilitates the installation of the chain 240.

[0035] Furthermore, the sprocket seat 210 is divided into a base 361 and a cover 362 at the bearing connection between the drive shaft 310 and the driven shaft 320. The cover 362 is detachably connected to the base 361.

[0036] Specifically, the top surfaces of the base 361 and the cover 362 each have two semi-circular notches. When installing the drive shaft 310 and the driven shaft 320, first, the bearings are respectively fitted onto the drive shaft 310 and the driven shaft 320. Then, the bearing parts are placed one-to-one into the corresponding holes on the base 361. Finally, the cover 362 is threaded onto the base 361. The base 361 and the cover 362 form two holes for installing the bearings. The bearings are interference-fitted with these holes to achieve bearing installation. Users can quickly install the bearings through the detachable cover 362, improving installation efficiency.

[0037] Furthermore, the present invention also includes an adjustable pitch structure. The sprocket seat 210 includes a fixed seat and a sliding seat. The driving wheel 220 is rotatably connected to the fixed seat, and the driven wheel 230 is rotatably connected to the sliding seat. The adjustable pitch structure can adjust the front and rear position of the sliding seat so that the sliding seat is closer to or farther from the fixed seat.

[0038] Specifically, the fixed seat and the external window frame 100 are relatively fixed. The adjustable distance structure can adjust the distance between the sliding seat and the fixed seat according to the thickness of the movable window sash 120 and the positioning window sash, thereby changing the distance between the driving wheel 220 and the driven wheel 230. This makes it suitable for different lift windows, improving applicability and range of use. Correspondingly, the cover 362 also needs to be divided into front and rear parts according to the fixed seat and the sliding seat to ensure that the fixed seat and the sliding seat can move relative to each other. At the same time, the adjacent side walls between the fixed seat and the sliding seat can be vertical smooth planes, so that the fixed seat and the sliding seat can fit together, making the distance between the driving shaft 310 and the driven shaft 320 closer, and increasing the range of distance adjustment.

[0039] Furthermore, the adjustable pitch structure includes a screw, a slide rail, and a support. The screw extends in the front-to-back direction, with one end of the screw rotatably connected to the support and the other end of the screw rotatably connected to the fixed seat. The slide is threadedly connected to the screw and slidably connected to the slide rail. The top surface of the slide rail is provided with a threaded groove that extends in the front-to-back direction. The slide can be threadedly connected to the threaded groove by a screw.

[0040] Specifically, one end of the screw is positioned on the fixed seat, and the other end passes through the slide and is positioned on the support. When the screw rotates, the slide can move closer to or away from the fixed seat along the screw, thereby adjusting the distance between the driving wheel 220 and the driven wheel 230. After adjustment, the screw passes through the slide and extends into the threaded groove, so that the slide is positioned on the slide rail, achieving relative fixation between the slide and the fixed seat. This reduces the wobbling of the driven wheel 230 and improves stability during the lifting of the movable window sash 120.

[0041] It should be noted that the threaded groove is elongated, with multiple raised ribs extending along the groove's direction on its inner wall. These ribs engage with the screw's threads. Users can manually adjust the slide's position by turning the screw, then position it by inserting the screw into the threaded groove. Alternatively, a motor-driven screw can be used for automatic adjustment. Furthermore, the screw can be connected to the fixed seat via bearings or other rotatable connections, ensuring the connection point remains constant and that the screw's rotation axis coincides with its central axis.

[0042] Furthermore, the present invention also provides a lift window, which includes a window frame 100, a fixed window sash 130, and the aforementioned lift structure 110. The fixed window sash 130 is fixedly connected to the window frame 100 and covers the lower half of the window frame 100, and the movable window sash 120 is slidably connected to the window frame 100.

[0043] Specifically, the motor drives the drive wheel 220 to rotate, causing the movable window sash 120 to move upward and close the window frame 100, or causing the movable window sash 120 to move downward and open the window frame 100, facilitating ventilation and use. Simultaneously, the movable window sash 120 is slidably connected to the window frame 100, improving its aesthetics and operational stability. In practice, the fixed window sash 130 can also be fixed to the upper half of the window frame 100, allowing the movable window sash 120 to open and close the lower half.

[0044] Furthermore, refer to Figure 4 The window frame 100 includes a top frame 201 and a side frame 401. The sprocket seat 210 and the motor are both located inside the top frame 201. The side frame 401 has a first chamber 410 and a second chamber 420 separated along the front-back direction. The two ends of the chain 240 hang down from the top frame 201 into the first chamber 410 and the second chamber 420, respectively. The movable window sash 120 is slidably connected to the side frame 401.

[0045] Specifically, the motor and sprocket seat 210 are mounted on the top frame 201 to facilitate the lifting of the movable window sash 120. The side frame 401 is divided into a first chamber 410 and a second chamber 420. The upper openings of the first chamber 410 and the second chamber 420 are connected to the inner cavity of the top frame 201. Each side frame 401 corresponds to a lifting unit, so that the two ends of the chain 240 in a lifting unit can be directly inserted into the sprocket seat 210 in sections to prevent interference between the movable window sash 120 and the balancing component. At the same time, the second chamber 420 can limit the range of motion of the balancing component, and the first chamber 410 can provide space for the sliding connection of the movable window sash 120, reducing shaking and improving service life and stability.

[0046] Furthermore, the present invention also includes an electric screen window, wherein the upper half of the window frame 100 is divided into an outdoor side 142 and an indoor side 141 along the front and rear positions, the movable window sash 120 is located on the outdoor side 142, and the top of the fixed window sash 130 is connected to a crossbeam 131, which extends rearward.

[0047] Furthermore, the electric screen window includes a drive unit, a roller 251, a screen curtain 252, and a lower horizontal bar 253. The roller 251 is located at the top of the indoor side 141 and is connected to the window frame 100 in the left-right direction. The screen curtain 252 is wound around the roller 251. The lower horizontal bar 253 is connected to the lower side of the screen curtain 252. The drive unit can rotate and drive the roller 251 so that the screen curtain 252 gradually covers the indoor side 141 until the lower horizontal bar 253 faces downward and abuts against the crossbeam 131.

[0048] Specifically, the driving component can be a rotating driving element such as a motor. When the user lowers the movable window sash 120, the driving component can rotate the roller 251, causing the lower end of the curtain 252 and the lower horizontal bar 253 wound on the roller 251 to gradually move down. The curtain 252 gradually covers the space of the interior side 141 until the lower horizontal bar 253 abuts against the crossbeam 131, thus completing the complete covering of the interior side 141.

[0049] This invention uses an electric screen to block the upper half of the window width while allowing ventilation, thus improving functionality. The electric screen and the movable window sash 120 are located on the indoor side 141 and the outdoor side 142, respectively, preventing interference between them and facilitating user control and disassembly of the electric screen, enhancing the user experience. Furthermore, the crossbeam 131 covers the top of the fixed window sash 130, improving its installation stability and aesthetics. It also allows for the installation of a limiting structure for the movable window sash 120 on the crossbeam 131. For example, a downward-facing limiting hook is provided on the front bottom surface of the crossbeam 131, and a positioning hook is provided on the bottom side of the movable window sash 120 opposite to the limiting hook. The positioning hook can engage with the limiting hook, restricting the upward movement of the movable window sash 120. The interlocking part of the positioning hook and the limiting hook is made of a cushioning material such as rubber to reduce noise when closing the window. In addition, the lower horizontal bar 253 can be slidably connected to the side frame 401 to pull the curtain 252 and ensure the flatness of the curtain 252.

[0050] In fact, the left and right ends of the movable window sash 120 are slidably connected to the two side frames 401. Specifically, the side walls of the side frames 401 are provided with vertical sliding grooves, which are connected to the first chamber 410. The two sides of the movable window sash pass through the corresponding sliding grooves and enter the corresponding first chamber 410.

[0051] Furthermore, in combination Figure 4Both sides of the movable sash window are equipped with rollers 430 to reduce the sliding friction when the movable sash window moves up and down. In addition, the inner wall of the slide is equipped with a dustproof rubber strip, which abuts against both sides of the movable sash window to reduce dust entry and prevent collision between the movable sash window and the slide, thereby reducing noise and wear.

[0052] Furthermore, the first chamber 410 is provided with a first limiting member 440 and a second limiting member 450, and the first limiting member 440 and the second limiting member 450 form an anti-sway space 460. The roller 430 is located in the anti-sway space 460 to prevent the roller 430 from swinging and reduce the swaying of the movable window in the left-right and front-back directions.

[0053] Furthermore, both the first limiting member 440 and the second limiting member 450 are arc-shaped and surround the opposite side of the roller 430, reducing costs while simultaneously limiting the roller 430 in the front-back and left-right directions.

[0054] In this embodiment, the two ends of the roller 251 are connected to the two side frames 401. The position of the roller 251 corresponds to the position of the second chamber 420 of the side frame 401 to prevent interference with the movable window sash 120. At the same time, a maintenance cover is detachably rotatably connected to the top frame 201. The maintenance cover is closed on the roller 251. When it is necessary to repair or disassemble the electric screen window, the maintenance cover can be lifted or removed.

[0055] In fact, the top surface of the movable window sash 120 and the bottom surface of the lower horizontal sash 253 can be equipped with buffer pads such as rubber pads to reduce noise.

[0056] Additionally, the balancing component located in the second chamber 420 can be a counterweight bar. The upper end of the counterweight bar is connected to the rear end of the chain 240 to balance the torque borne by the motor, reduce the motor load, and improve the motor output stability and service life. Alternatively, the balancing component can include a pull rope, a movable pulley, and a tension spring. One end of the pull rope is connected to the chain 240, and the other end goes down past the movable pulley and then extends upward to connect to the top side of the window frame 100. The upper end of the tension spring is connected to the movable pulley, and the lower end is connected to the bottom of the window frame 100. In practice, the counterweight bar can be made of metal materials such as an iron bar.

[0057] The tension spring provides damping during the up-and-down movement of the sliding window, reducing the load on the motor during start-up or braking. Specifically:

[0058] When the window needs to be opened, the motor drives the drive wheel 220, which in turn moves the pulling end of the chain 240 downward. The movable end of the pull rope moves upward with the damping end, the movable pulley gradually moves upward, and the tension spring gradually lengthens. During the downward movement of the movable window sash 120, the tension provided by the tension spring to the damping end of the chain 240 gradually increases. When the motor brakes, it needs to provide a greater reverse force than the movable window sash 120 to reduce the moving speed of the movable window sash 120 and achieve the braking effect. At this time, the torque required by the motor increases, while the gradually stretched tension spring provides a certain acceleration to the other side of the motor, which can balance the torque borne by the motor.

[0059] When the window needs to be closed, the motor reverses, causing the pulling end of the chain 240 to move upward, the movable end of the pull rope to move downward, the movable pulley to move downward, and the tension spring to gradually retract. During the upward movement of the movable window sash 120, the tension provided by the tension spring to the damping end of the chain 240 gradually decreases. When the motor brakes, in order to ensure that the movable window sash 120 stops moving under its own gravity, the required tension on the movable window sash 120 is reduced. The tension spring gradually retracts to reduce the tension on the motor, which can also reduce the burden on the motor.

[0060] Furthermore, without considering aesthetics, the balancing component can actually be set outside the window frame 100.

[0061] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A lifting structure, characterized in that: It includes two lifting units arranged at a distance from each other, the lifting unit comprising: A sprocket seat (210) has a drive wheel (220) and a driven wheel (230) arranged sequentially along its front-to-back direction. The rotation axes of the drive wheel (220) and the driven wheel (230) both extend in the left-to-right direction. A chain (240) rests on the top sides of the driving wheel (220) and the driven wheel (230), with the front and rear ends of the chain (240) hanging down; The motor drives the drive wheel (220) to rotate. The drive wheel (220) is synchronously connected to the drive shaft (310). The driven wheel (230) is synchronously connected to the passive shaft (320). The drive shaft (310) and the passive shaft (320) are both bearing connected to the sprocket seat (210). The sprocket seat (210) includes a first seat plate (330) and a second seat plate (340) spaced apart on the left and right sides. The two ends of the drive shaft (310) and the two ends of the passive shaft (320) are respectively rotatably connected to the first seat plate (330) and the second seat plate (340). The adjustable pitch structure includes a sprocket seat (210) comprising a fixed seat and a sliding seat arranged at the front and rear, respectively. The driving wheel (220) is rotatably connected to the fixed seat, and the driven wheel (230) is rotatably connected to the sliding seat. The adjustable pitch structure can adjust the front and rear position of the sliding seat.

2. The lifting structure according to claim 1, characterized in that: It also includes a balancing component, which includes a pull rope, a movable pulley and a tension spring. One end of the pull rope is connected to the rear end of the chain (240), and the other end of the pull rope passes downward around the movable pulley and extends upward. The upper end of the tension spring is connected to the movable pulley, and the lower end of the tension spring, the other end of the pull rope and the sprocket seat (210) are fixed relative to each other.

3. The lifting structure according to claim 1, characterized in that: It also includes a balancing component, which is a counterweight bar, the upper end of which is connected to the rear end of the chain (240).

4. The lifting structure according to claim 1, characterized in that: The adjustable structure includes a screw and a slide rail. The slide block is provided with a threaded channel extending forward and backward. The front end of the screw is rotatably connected to the fixed seat. The rear end of the screw is threaded into the threaded channel and passes through the threaded channel. The slide block is slidably connected to the slide rail.

5. A lift-up window, comprising a window frame (100), a fixed window sash (130), and a movable window sash. (120) The lifting structure (110) as described in any one of claims 1 to 4, characterized in that: The fixed window sash (130) is fixedly connected to the window frame (100), and the movable window sash is slidably connected to the window frame (100) up and down.

6. A lift window according to claim 5, characterized in that: The window frame (100) includes a top frame (201) and side frames (401). The two side frames (401) are connected to the left and right sides of the top frame (201). The sprocket seat (210) and the motor are both located inside the top frame (201). The side frames (401) are divided into a first chamber (410) and a second chamber (420) along the front-back direction. The two ends of the chain (240) hang down from the top frame (201) into the first chamber (410) and the second chamber (420) respectively. The movable window sash (120) is slidably connected to the side frame (401).

7. A lift window according to claim 5, characterized in that: It also includes an electric screen window. The window frame (100) is divided into an outdoor side (142) and an indoor side (141) along the front and back positions. The movable window sash (120) is located on the outdoor side (142). The top of the fixed window sash (130) is connected to a crossbeam (131). The crossbeam (131) extends backward. The electric screen window includes a drive unit, a roller (251), a curtain (252), and a lower crossbeam (253). The roller (251) is located on the top of the indoor side (141) and is connected to the window frame (100) in the left and right direction. The curtain (252) is wound around the roller (251). The lower crossbeam (253) is connected to the lower side of the curtain (252). The drive unit can rotate and drive the roller (251) so that the lower crossbeam (253) abuts against the crossbeam (131) downward.

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