A lifting device for doors and windows and a door and window

Abstract

The utility model provides a kind of lifting device for door and window and door and window, and the lifting device for door and window includes flexible traction piece, winding wheel, rotary drive part and sliding cooperation piece, and flexible traction piece is used to connect the sash of door and window;Winding wheel is used to retract flexible traction piece to lift sash;The output end of rotary drive part is equipped with transmission shaft, and transmission shaft is connected with one end of winding wheel, for driving winding wheel to rotate;The other end of winding wheel can be translational connection in sliding cooperation piece, for driving winding wheel synchronous translation when winding wheel rotates, to ensure that flexible traction piece is sequentially wound on winding wheel.By the cooperation of rotary drive part and winding wheel, retracting and releasing flexible traction piece directly, simplify the retracting and releasing structure of flexible traction piece.Combining rotation with axial displacement, through the adaptive sliding compensation winding position deviation of winding wheel, to simplify transmission process and realize automatic wire arrangement function, improve the stability and security of sash lifting.

Description

Technical Field

[0001] This utility model relates to the technical field of door and window hardware, and in particular to a lifting device for doors and windows and a door and window. Background Technology

[0002] Balcony sliding windows use a lift-up and pull-down opening mechanism, offering advantages such as excellent ventilation, good airtightness, space-saving design, and easy cleaning. Electric control of the balcony sliding window further enhances its portability. Current solutions use a motor-driven transmission rod to lift the movable sash via a steel cable. This structure suffers from complex installation and high cost. Furthermore, if the steel cable becomes misaligned, presses against the wire, or is too far apart during winding onto the reel, it can affect the lifespan of the lifting device, leading to unstable window sash operation and potential safety hazards. Utility Model Content

[0003] The purpose of this invention is to provide a lifting device for doors and windows to solve at least some of the above-mentioned technical problems.

[0004] The first aspect of this utility model provides a lifting device for doors and windows, including a flexible traction member, a winding wheel, a rotary drive member, and a sliding engagement member. The flexible traction member is used to connect the window sash of the door or window; the winding wheel is used to retract the flexible traction member to raise or lower the window sash; the output end of the rotary drive member is provided with a drive shaft, which is connected to one end of the winding wheel to drive the winding wheel to rotate; the other end of the winding wheel is translatably connected to the sliding engagement member, which drives the winding wheel to translate synchronously when the winding wheel rotates, so as to ensure that the flexible traction member is sequentially wound on the winding wheel.

[0005] Furthermore, the sliding engagement component is concentrically arranged with the transmission shaft, the sliding engagement component is provided with a first thread structure, and the other end of the winding wheel is provided with a second thread structure, the first thread structure and the second thread structure meshing with each other.

[0006] Furthermore, the thread pitch of the first thread structure is the same as that of the second thread structure, and the thread pitch of the first thread structure is greater than or equal to the diameter of the flexible traction member.

[0007] Furthermore, the lifting device for doors and windows also includes a concentric shaft, which is concentrically arranged with the transmission shaft and the sliding fit member, and the concentric shaft passes through the transmission shaft and the sliding fit member.

[0008] Furthermore, one end of the concentric shaft is fixedly connected to one end of the transmission shaft, the other end of the transmission shaft is opposite to one end of the sliding fit member, the other end of the concentric shaft is rotatably connected to the other end of the sliding fit member, the outer wall of the concentric shaft is provided with a groove, and a ball is provided between the groove and the inner wall of the sliding fit member.

[0009] Furthermore, the lifting device for doors and windows also includes a mounting base, which has a first bearing groove, a second bearing groove, and a winding receiving groove. The first bearing groove and the second bearing groove are respectively located at both ends of the mounting base, and the winding receiving groove is located between the first bearing groove and the second bearing groove. One end of the drive shaft is rotatably connected to the first bearing groove, and the other end of the sliding fitting is fixedly connected to the second bearing groove. The winding wheel is placed in the winding receiving groove.

[0010] Furthermore, the mounting base includes a first base body and a second base body. The first base body is provided with a first arc-shaped groove, and the second base body is provided with a second arc-shaped groove. The first arc-shaped groove and the second arc-shaped groove are joined together to form the winding receiving groove. The shape of the winding receiving groove is adapted to the shape of the winding wheel, and the distance between the inner wall of the winding receiving groove and the outer wall of the winding wheel is greater than zero and less than the diameter of the flexible traction member.

[0011] Furthermore, the lifting device for doors and windows also includes a guide pulley and a guide seat. The guide pulley is rotatably connected to the guide seat, and the guide seat is provided with a guide groove that limits the movement of the flexible traction member.

[0012] Furthermore, the lifting device for doors and windows also includes a wire lifting adjustment structure, which is located on both sides of the window sash. One end of the flexible traction member is connected to the winding wheel, and the other end of the flexible traction member is connected to the wire lifting adjustment structure.

[0013] The second aspect of this utility model provides a door and window, including a window frame and a window sash, wherein the aforementioned lifting device for the door and window is provided between the window frame and the window sash.

[0014] The beneficial effects of this plan are as follows: The lifting device and window / door provided in this application directly retract and extend the flexible traction component through the cooperation of a rotary drive and a winding wheel, eliminating the need for gear or chain transmission and simplifying the retraction and extension structure of the flexible traction component. The sliding engagement between the sliding component and the winding wheel ensures that the flexible traction component is wound sequentially on the winding wheel, preventing misalignment and knotting. By combining rotational motion with axial displacement, and through the adaptive sliding of the winding wheel to compensate for winding position deviations, the transmission process is simplified and an automatic wiring function is achieved, improving the smoothness and safety of window sash lifting and lowering. Attached Figure Description

[0015] Figure 1 A schematic diagram of a lifting device for doors and windows; Figure 2 A partial structural diagram of a lifting device for doors and windows; Figure 3 This is a schematic diagram showing the connection relationship between the winding wheel, the sliding fit, and the drive shaft. Figure 4 for Figure 3 A cross-sectional view cut along section AA. Figure 5 This is a schematic diagram showing a partial connection between the winding wheel, the sliding fit, and the drive shaft; Figure 6 This is an exploded view of the winding wheel, sliding fit parts, and drive shaft. Figure 7 This is an exploded view of the mounting base. Figure 8 for Figure 7 A cross-sectional view of the middle section (BB section); Figure 9 This is a schematic diagram of the steel wire lifting and adjusting structure; Figure 10 A schematic diagram of the steel wire lifting and adjustment structure installed to conceal the rope end.

[0016] Explanation of reference numerals in the attached figures: 10. Flexible traction component; 20. Winding wheel; 201. Winding coil body; 202. Sliding coil body; 21. Second threaded structure; 30. Rotary drive component; 40. Sliding fit component; 41. First threaded structure; 50. Drive shaft; 60. Concentric shaft; 61. Groove; 70. Mounting base; 71. First bearing groove; 72. Second bearing groove; 73. Winding receiving groove; 701. First seat body; 702. Second seat body; 81. Guide pulley; 82. Guide seat; 821. Pulley groove; 822. Guide groove; 90. Wire lifting adjustment structure; 91. Fixed seat; 911. Top plate; 912. Guide hole; 913. First sliding connection part; 92. Connecting slider; 921. Sliding plate; 9211. Second sliding connection part; 922. Sliding housing; 923. Winding column; 93. Tension adjustment component; 94. Pressing component; 941. Pressing rod; 942. Pressing head; 95. Side pressure roller. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise expressly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection within two components. For those skilled in the art, the specific meaning of the terms in this utility model can be understood according to the specific circumstances.

[0019] This solution discloses a door and window, including a window frame and a window sash, with a lifting device for the door and window provided between the window frame and the window sash.

[0020] See Figure 1-2 The lifting device for doors and windows includes a flexible traction member 10, a winding wheel 20, a rotary drive member 30, and a sliding engagement member 40. The flexible traction member 10 is used to connect the window sash of the door or window; the winding wheel 20 is used to raise and lower the window sash by retracting the flexible traction member 10; the output end of the rotary drive member 30 is provided with a drive shaft 50, which is fixedly connected to one end of the winding wheel 20 to drive the winding wheel 20 to rotate; the other end of the winding wheel 20 can be slidably connected to the sliding engagement member 40 to drive the winding wheel 20 to move synchronously when the winding wheel 20 rotates, so as to ensure that the flexible traction member 10 is wound sequentially on the winding wheel 20.

[0021] The flexible traction component 10 connects the window sash to the winding wheel 20, and can be implemented using a steel wire rope to transmit lifting force. The winding wheel 20 is a rotating component with a cylindrical winding surface, and can be made of aluminum alloy or engineering plastic. Its surface can be smooth or have spiral grooves 61 to guide the flexible traction component 10 in an orderly arrangement. The rotary drive component 30 provides rotational power, and can be implemented using a geared motor or stepper motor. It is rigidly connected to the winding wheel 20 via a drive shaft 50 to transmit torque. The sliding mating component 40 forms an axial sliding pair with the winding wheel 20, and can be a sleeve structure with internal threads. The threaded engagement converts rotational motion into axial displacement, thereby compensating for the positional misalignment of the winding layer of the flexible traction component 10.

[0022] Specifically, when the rotary drive 30 is activated, the drive shaft 50 drives the winding wheel 20 to rotate, thereby winding or releasing the flexible traction member 10. The winding wheel 20 moves axially under the constraint of the sliding engagement 40, ensuring that the flexible traction members 10 are arranged sequentially and closely. The sliding connection between the sliding engagement 40 and the winding wheel 20 allows the winding wheel 20 to translate synchronously during rotation, ensuring that the flexible traction members 10 are wound smoothly without misalignment or pressure on the wire. The unidirectional rotational motion of the rotary drive 30 is directly converted into the vertical lifting and lowering of the window sash via the winding wheel 20, eliminating the need for an intermediate transmission mechanism.

[0023] Through the above solution, this application achieves a simplified installation structure for the electric lift window, reduces the manufacturing cost of transmission components, and eliminates the jamming problem caused by the winding misalignment of the flexible traction component 10. The axial displacement compensation function of the winding wheel 20 ensures that the flexible traction component 10 is always extended and retracted along the preset path, improving the reliability of system operation.

[0024] See Figure 3-6 The sliding engagement 40 is concentrically arranged with the transmission shaft 50. The sliding engagement 40 is provided with a first thread structure 41, and the other end of the winding wheel 20 is provided with a second thread structure 21. The first thread structure 41 and the second thread structure 21 mesh with each other.

[0025] The drive shaft 50 and the winding wheel 20 are connected axially via a non-circular hole (e.g., quadrilateral, pentagonal, or hexagonal). When the drive shaft 50 rotates, it drives the winding wheel 20 to rotate synchronously. However, the drive shaft 50 and the winding wheel 20 are not fixedly connected, thus ensuring that when the first threaded structure 41 and the second threaded structure 21 are engaged, the winding wheel 20 can move horizontally along the axial direction of the drive shaft 50. It should be noted that the connection length between the drive shaft 50 and the winding wheel 20 needs to be greater than the adjustment length of the first threaded structure 41 and the second threaded structure 21 to prevent the winding wheel 20 from disengaging from the drive shaft 50 during adjustment.

[0026] In this embodiment, the winding wheel 20 includes a winding coil body 201 and a sliding coil body 202. The outer surface of the drive shaft 50 is hexagonal prism-shaped. The hollow inner side of the winding coil body 201 has a hexagonal hole. The outer side of the sliding coil body 202 is hexagonal prism-shaped with the same shape as the outer surface of the drive shaft 50 and is fixedly connected to the winding coil body 201. The second threaded structure 21 is provided inside the sliding coil body 202. Of course, in actual production, the winding coil body 201 and the sliding coil body 202 of the winding wheel 20 can also be integrally formed.

[0027] The first thread structure 41 refers to a helical protrusion or groove 61 formed on the end face of the sliding mating part 40, which can be achieved by machining a trapezoidal or rectangular thread, and is used to convert rotational motion into axial displacement. The second thread structure 21 refers to a helical groove 61 or protrusion formed on the end face of the winding wheel 20 and complementary to the first thread structure 41, which can be achieved by CNC machine tool cutting, and transmits rotational force and generates axial sliding through meshing with the first thread structure 41. This solution couples rotation and axial sliding through thread meshing, and achieves synchronous motion by utilizing the self-guiding characteristics of the thread, thus simplifying the mechanical structure.

[0028] Furthermore, the thread pitch of the first thread structure 41 is the same as that of the second thread structure 21, and the thread pitch of the first thread structure 41 is greater than or equal to the diameter of the flexible traction member 10.

[0029] When the winding wheel 20 rotates under the action of the rotating drive 30, the meshing of the second thread structure 21 and the first thread structure 41 forces the winding wheel 20 to slide axially. Since the thread pitch is equal to the diameter of the flexible traction member 10, the axial displacement generated by the winding wheel 20 per revolution is exactly equal to the axial space occupied by a single flexible traction member 10 on the surface of the winding wheel 20. This displacement ensures that the newly wound flexible traction member 10 fits tightly against the previous turn of the flexible traction member 10, preventing interlayer gaps that would cause loose winding, and also preventing insufficient axial displacement from causing the flexible traction member 10 to overlap and deform, thus achieving equidistant arrangement of each turn of the flexible traction member 10 along the axial direction of the winding wheel 20. When a groove is provided on the winding wheel 20, setting the thread pitch slightly larger than the diameter of the wire rope is beneficial for compensating for the width of the groove.

[0030] This solution, by defining a strict correspondence between the thread pitch and the diameter of the flexible traction member 10, transforms the transmission characteristics of the threaded pair into a precise axial displacement control mechanism, eliminating the possibility of winding misalignment at its source. Through this technical solution, this application ensures that the flexible traction member 10 forms a neat, evenly spaced winding layer on the surface of the winding wheel 20, avoiding misalignment and accumulation of the flexible traction member 10 due to axial displacement deviation, effectively improving the winding stability and transmission reliability of the flexible traction member 10.

[0031] In one embodiment, the lifting device for doors and windows further includes a concentric shaft 60, which is concentrically arranged with the transmission shaft 50 and the sliding engagement member 40, and the concentric shaft 60 passes through the transmission shaft 50 and the sliding engagement member 40.

[0032] The two ends of the concentric shaft 60 are respectively inserted into the central holes of the drive shaft 50 and the sliding engagement part 40. When the rotary drive 30 drives the drive shaft 50 to rotate, the concentric shaft 60, through its rigid structure, supports and restricts the radial offset of the drive shaft 50 and the sliding engagement part 40, while increasing the strength of the drive shaft 50 and the sliding engagement part 40 in the axial direction, preventing deformation of the drive shaft 50 or the sliding engagement part 40, and ensuring that the two ends of the winding wheel 20 are always on the same axis of rotation. This effectively suppresses the radial runout during the rotation of the winding wheel 20, reduces the frictional loss between the drive shaft 50 and the sliding engagement part 40, avoids the helical winding misalignment phenomenon of the flexible traction part 10 caused by the axial offset of the winding wheel 20, and extends the service life of the threaded meshing structure, thereby improving the operational stability of the lifting device.

[0033] Furthermore, one end of the concentric shaft 60 is fixedly connected to one end of the transmission shaft 50, and the other end of the transmission shaft 50 is opposite to one end of the sliding fit member 40. The other end of the concentric shaft 60 is rotatably connected to the other end of the sliding fit member 40. The outer wall of the concentric shaft 60 is provided with a groove 61, and a ball is provided between the groove 61 and the inner wall of the sliding fit member 40.

[0034] The groove 61 is an annular groove extending radially along the concentric shaft 60, which can be formed by CNC machine tool cutting. It is used to limit the movement trajectory of the ball and prevent axial displacement. When the drive shaft 50 drives the winding wheel 20 to rotate, the sliding mating part 40 generates axial displacement due to the thread engagement. The concentric shaft 60 forms a rigid support by being fixedly connected to the drive shaft 50 at one end, and forms a rotatable connection with the sliding mating part 40 at the other end through the ball. Under the limitation of the groove 61, the ball rolls along the inner wall of the sliding mating part 40, transforming traditional sliding friction into rolling friction. This structure not only ensures the coaxiality requirement between the drive shaft 50 and the sliding mating part 40, but also reduces the frictional resistance during axial movement through rolling contact, enabling the sliding mating part 40 to smoothly complete axial displacement during the rotation of the winding wheel 20.

[0035] This design, through the cooperation of ball bearings and groove 61, converts sliding friction into rolling friction while maintaining coaxiality. This achieves low-resistance movement during the axial movement of the sliding mating part 40, eliminating transmission jitter caused by friction and ensuring stable displacement of the winding wheel 20 during the deployment and retraction of the flexible traction component 10. The ball bearings also improve load-bearing capacity. Simultaneously, the rolling contact method significantly reduces wear on the contact surfaces, extending the service life of the sliding mating part 40 and the concentric shaft 60, and ensuring the long-term reliability of the lifting device.

[0036] It should be noted that, in another embodiment, one end of the concentric shaft 60 can be rotatably connected to one end of the drive shaft 50, and the other end of the concentric shaft 60 is fixedly connected to the sliding fitting 40, with the groove 61 located inside the drive shaft 50. The connection method is different, but the effect is basically the same as in the previous embodiment.

[0037] See Figure 7-8 The lifting device for doors and windows also includes a mounting base 70. The mounting base 70 is provided with a first bearing groove 71, a second bearing groove 72, and a winding receiving groove 73. The first bearing groove 71 and the second bearing groove 72 are respectively located at both ends of the mounting base 70. The winding receiving groove 73 is located between the first bearing groove 71 and the second bearing groove 72. One end of the drive shaft 50 is rotatably connected to the first bearing groove 71, and the other end of the sliding fitting 40 is fixedly connected to the second bearing groove 72. The winding wheel 20 is placed in the winding receiving groove 73.

[0038] The first bearing groove 71 is a rotary support groove located at one end of the mounting base 70. It can be rotatably connected to the drive shaft 50 using a bearing or bushing, and is used to constrain the rotational freedom of the drive shaft 50. The second bearing groove 72 is a fixed support groove located at the other end of the mounting base 70. It can be implemented using a hexagonal hole that matches the shape of the sliding fit part 40, and is used to limit the axial displacement of the sliding fit part 40. The winding receiving groove 73 is an annular space located in the middle of the mounting base 70. It can be formed by stamping or casting, and its inner diameter is slightly larger than the outer diameter of the winding wheel 20, and is used to limit the radial offset of the winding wheel 20.

[0039] When the winding wheel 20 rotates within the winding receiving groove 73, the gap between its outer wall and the inner wall of the groove can accommodate the winding layer of the flexible traction member 10, while preventing the flexible traction member 10 from coming off. The overall structure of the mounting base 70 replaces the traditional multi-part assembly with a slotted positioning method. The winding wheel 20 assembly can be directly pre-installed in the winding receiving groove 73. During assembly, it is only necessary to insert the drive shaft 50 and the sliding fitting 40 into the corresponding slots to complete the fixation.

[0040] In traditional solutions, the winding wheel 20 typically requires a separate mounting bracket and is connected to the motor and sliding components via multiple bolts, resulting in cumbersome assembly steps and high alignment accuracy requirements. This solution utilizes a mounting base 70 that integrates the first bearing groove 71, the second bearing groove 72, and the winding receiving groove 73. This pre-sets the mounting positions of the winding wheel 20, the drive shaft 50, and the sliding mating component 40. During assembly, only the components need to be inserted into their corresponding grooves, eliminating the need for additional alignment adjustments and significantly reducing installation time. Furthermore, the wrapping constraint of the winding receiving groove 73 on the winding wheel 20 effectively suppresses vibration during rotation, preventing misalignment of the flexible traction component 10 due to the offset of the winding wheel 20.

[0041] Furthermore, the mounting base 70 includes a first base body 701 and a second base body 702. The first base body 701 is provided with a first arc-shaped groove, and the second base body 702 is provided with a second arc-shaped groove. The first arc-shaped groove and the second arc-shaped groove are joined together to form a winding receiving groove 73. The shape of the winding receiving groove 73 is adapted to the shape of the winding wheel 20, and the distance between the inner wall of the winding receiving groove 73 and the outer wall of the winding wheel 20 is greater than zero and less than the diameter of the flexible traction member 10.

[0042] The winding receiving groove 73 refers to the annular space formed by splicing two arc-shaped grooves, specifically achieved through a split-type base structure. Its shape forms a clearance fit with the outer contour of the winding wheel 20. The distance between the inner wall and the outer wall of the winding wheel 20 refers to the constraint range of the winding receiving groove 73 on the winding wheel 20, which is specifically achieved by controlling the machining accuracy. This distance is limited to being less than the diameter of the flexible traction member 10 to prevent the flexible traction member 10 from being embedded in the installation gap.

[0043] The winding wheel 20 is constrained within an annular space formed by the splicing of two separate bases, with a slight gap between the contour of the winding receiving groove 73 and the outer wall of the winding wheel 20. As the winding wheel 20 rotates, its outer wall is always physically limited by the inner wall of the winding receiving groove 73, preventing the flexible traction member 10 from entering the installation gap during winding. The separate base structure eliminates the need for axial alignment during installation of the winding wheel 20; assembly is completed simply by closing the two bases along their joint surfaces. The dimensional control of the winding receiving groove 73 ensures the freedom of rotation for the winding wheel 20, while the gap constraint forms the boundary guide for the winding path of the flexible traction member 10.

[0044] This application enables rapid assembly of the winding reel 20 mounting structure, effectively avoiding abnormal winding caused by the flexible traction component 10 getting stuck in the installation gap. The split-type base structure simplifies the manufacturing process, and the gap control of the winding receiving groove 73 ensures smooth operation of the mechanism and forms a physical anti-jamming barrier, significantly improving the working reliability of the lifting device.

[0045] In one embodiment, the lifting device for doors and windows further includes a guide pulley 81 and a guide seat 82. The guide pulley 81 is rotatably connected to the guide seat 82, and the guide seat 82 is provided with a guide groove 822 that limits the movement of the flexible traction member 10.

[0046] The guide pulley 81 refers to a wheel with a rotational support structure, which can be implemented as a metal roller supported by bearings. Its outer circumferential surface forms an arc-shaped concave surface that contacts the flexible traction member 10, used to guide the flexible traction member 10 to move along a predetermined path and reduce sliding friction. The guide seat 82 is provided with a pulley groove 821 for mounting the guide pulley 81, and an inlet guide groove 822 and an outlet guide groove 822 connecting the pulley groove 821. The guide groove 822 can prevent the flexible traction member 10 from deviating.

[0047] The guide pulley 81 includes a horizontal guide pulley 81 and a vertical guide pulley 81. The horizontal guide pulley 81 is used to guide the flexible traction member 10 on the profile above the window frame, and the vertical guide pulley 81 is used to connect and guide the flexible traction member 10 to the vertical direction on both sides of the profile.

[0048] In actual production, to ensure ease of installation and stability of connection, the guide seat 82 and the first seat body 701 are designed as an integral molding structure.

[0049] In one embodiment, the lifting device for doors and windows further includes a wire lifting adjustment structure 90, which is disposed on both sides of the window sash. One end of the flexible traction member 10 is connected to the winding wheel 20, and the other end of the flexible traction member 10 is connected to the wire lifting adjustment structure 90.

[0050] See Figure 9-10 The wire lifting adjustment structure 90 includes a fixed base 91, a connecting slider 92, and a tension adjustment component 93. The fixed base 91 is used to connect to the side wall of the window sash. The top plate 911 of the fixed base 91 is provided with a guide hole 912A for the flexible traction component 10 to pass through. The connecting slider 92 is longitudinally slidably connected to the fixed base 91. The connecting slider 92 is used to adjust one end of the flexible traction component 10, and the other end of the flexible traction component 10 is used to connect to the lifting device of the flexible traction component 10. The tension adjustment component 93 is passed through the top plate 911. The adjusting end and the abutting end of the tension adjustment component 93 are respectively provided on the inner and outer sides of the top plate 911. The abutting end of the tension adjustment component 93 abuts against the connecting slider 92 and is used to adjust the longitudinal displacement of the connecting slider 92.

[0051] The flexible traction component 10 can be made of steel wire rope. The fixed base 91 is a fixed base that supports the connecting components of the flexible traction component 10; it can be made of stamped or injection-molded metal. The guide hole 912A on the top plate 911 guides the direction of the flexible traction component 10, preventing friction between the flexible traction component 10 and the edge of the mounting base. The connecting slider 92 is a load-bearing component that slides vertically; it can be made of a metal block with a slide rail. Its sliding connection ensures the linear motion accuracy of the flexible traction component 10 during tension adjustment. The tension adjusting component 93 is a mechanical adjusting device with bidirectional force; it can be made of a bolt structure with external threads. The rotational motion is converted into linear displacement through thread engagement, and the pressure applied to the holding end precisely controls the slider position.

[0052] Specifically, after the flexible traction member 10 passes through the guide hole 912 of the top plate 911, its rope end is fixed to the connecting slider 92. When tension adjustment is required, the adjusting end of the tension adjusting member 93 is rotated, causing the supporting end to push the slider to slide along the inner wall of the mounting base. When the slider moves downward, the tensile tension of the flexible traction member 10 increases; when it moves upward, the tension is released. The guide hole 912 forms a path constraint on the flexible traction member 10, ensuring that the flexible traction member 10 always moves along a predetermined trajectory during adjustment. The sliding connection structure, in conjunction with the threaded adjustment mechanism, allows for fine-tuning of the tension without disassembling any components.

[0053] This application enables convenient and precise adjustment of the tension of the flexible traction component 10. During installation, the initial tension can be quickly adjusted by rotating the tension adjustment component 93. It also provides timely compensation should the flexible traction component 10 become slack during use, significantly improving system maintenance efficiency. The wire lifting adjustment structure of this solution achieves high-precision linear adjustment within a limited space, while maintaining a compact structure and ease of operation.

[0054] In this embodiment, the guide hole 912 is a closed hole located on the surface of the top plate 911, and the closed hole does not contact the periphery of the top plate 911. A closed hole refers to a completely sealed hole structure, which can be circular, elliptical, or polygonal, with continuous and uninterrupted hole walls. This structure provides a stable path for the flexible traction member 10, preventing lateral displacement during sliding, and effectively avoiding contact between the flexible traction member 10 and the window frame profile after installation, thus preventing friction and wear. Of course, the guide hole can also be an open hole structure.

[0055] Furthermore, the wire lifting adjustment structure also includes a clamping member 94, which is connected to the fixed base 91. The connecting slider 92 is provided with a winding column 923. One end of the flexible traction member 10 is wound to the winding column 923 and then fixedly connected to the clamping member 94.

[0056] The winding column 923 refers to the columnar structure set on the connecting slider 92. Specifically, it can be implemented using a metal column with threads or slots, used to wind the reversing flexible traction member 10. One end of the flexible traction member 10 is fixed to the surface of the winding column 923 by winding, for example, by winding it around the circumference of the column and then connecting it to the clamping member.

[0057] In this embodiment, the clamping member 94 includes a clamping rod 941 and a clamping head 942. The clamping rod 941 is connected to the fixed base 91, and the clamping head 942 is connected to the clamping rod 941. An irregular hole for squeezing and fixing one end of the flexible traction member 10 is provided between the clamping head 942 and the clamping rod 941.

[0058] The clamping component 94 is an assembly used to apply compressive pressure to the flexible traction component 10. Specifically, it can be implemented by combining a threaded metal rod with a pressure block. By tightening the clamping rod 941 and inserting one end of the flexible traction component 10 into the irregular hole of the clamping head 942, the rope end is clamped and fixed. The clamping rod 941 is a rod-shaped component that transmits adjustment force. Specifically, it can be implemented by a screw with external threads, and its end is fixed to the clamping head 942 by a threaded connection. Specifically, after the rope end of the flexible traction component 10 is initially wound on the winding column 923, the clamping rod 941 is installed in the threaded hole on the side wall of the fixing seat 91. Then, the rope end of the flexible traction component 10 is inserted into the irregular hole of the clamping head 942. As the clamping rod 941 is screwed in, the rope end is gradually squeezed until it is fixed. When a wide range of length adjustment of the flexible traction component 10 is required, the clamping rod 941 is adjusted to loosen the rope end of the flexible traction component 10, and then the rope end is pulled to achieve a wide range of length adjustment.

[0059] This application enables rapid reinforcement of the rope head of the flexible traction component 10 after installation, effectively preventing rope head slippage caused by external impact or vibration. At the same time, the adjustable characteristics of the clamping rod 941 allow maintenance personnel to flexibly adjust the clamping force according to the actual working conditions, reducing the risk of system failure caused by rope head loosening.

[0060] In another embodiment, the flexible traction member 10 is directly fixedly connected to the connecting slider 92, which can also achieve tension adjustment of the connecting slider 92.

[0061] In this embodiment, the connecting slider 92 includes a sliding plate 921 and a sliding shell 922. The sliding shell 922 and the sliding plate 921 surround a cavity that hides the flexible traction member 10. The rope end of the flexible traction member 10 and the winding post 923 that pass through the guide hole 912A are both located in the cavity.

[0062] The sliding plate 921 can be made of a rectangular metal plate and is used to support the rope head connection structure of the flexible traction member 10. The sliding shell 922 refers to the protective component covering the outside of the sliding plate 921, which can be made of a U-shaped sheet metal bending part, and together with the sliding plate 921, it forms a closed space. The two ends of the winding column 923 are connected to the sliding plate 921 and the sliding shell 922, respectively. The cavity refers to the accommodating space formed by the sliding shell 922 and the sliding plate 921, which can be achieved by welding the side wall of the shell to the edge of the sliding plate 921 to form a sealed structure, and is used to completely cover the connection part of the flexible traction member 10. This application achieves physical isolation protection of the connection part of the flexible traction member 10, preventing external environmental factors from interfering with the tension state of the flexible traction member 10, and ensuring the stability of the rope head connection structure during the lifting of the window sash. The synchronous movement of the cavity structure during adjustment ensures that the flexible traction member 10 is always in a controlled closed space, significantly improving the reliability of the lifting device in long-term use.

[0063] In this embodiment, the fixed base 91 is provided with a first sliding connection part 913, and the sliding plate 921 is provided with a second sliding connection part 9211. The first sliding part and the second sliding part cooperate to realize the sliding connection between the sliding plate 921 and the fixed base in the vertical direction.

[0064] The first sliding connection 913 refers to a guide structure disposed on the inner wall of the fixed base 91, which can be implemented as a longitudinally extending guide rail or a groove, used to limit the movement trajectory of the sliding plate 921. The second sliding connection 9211 refers to a mating structure disposed on the outer wall of the sliding plate 921, which can be implemented as a groove matching the guide rail or a protrusion matching the groove, forming a sliding pair through mating with the first sliding connection 913. The mating relationship between the two ensures that the sliding plate 921 remains stable during up and down movement, preventing deviation or shaking.

[0065] This application solves the problems of easy displacement and unstable movement of the sliding component during the adjustment of the flexible traction component 10. The cooperation structure between the guide rail and the slide groove effectively controls the vertical movement accuracy of the sliding plate 921, reducing tension fluctuations in the flexible traction component 10 caused by component shaking during the adjustment process. The limiting function of the sliding pair also reduces collision wear between components and extends the service life of the adjustment structure.

[0066] In this embodiment, the tension adjusting member 93 is provided with an external thread structure, and the top plate 911 is provided with an internal thread structure, and the external thread structure and the internal thread structure mesh with each other.

[0067] When the tension adjusting member 93 is rotated, the meshing of the external and internal threads causes the adjusting member to displace vertically. The abutting end of the adjusting member pushes the connecting slider 92 to change the distance between it and the top plate 911, thereby adjusting the tension of the flexible traction member 10. The self-locking effect formed by the thread meshing can maintain the stability of the adjusted position and prevent displacement caused by vibration. This solution achieves stepless adjustment through the precise fit of the thread pair. Each rotation can obtain the displacement corresponding to the standard pitch. For example, when the pitch is 1 mm, a fine adjustment accuracy of 0.01 mm can be achieved.

[0068] In this embodiment, the wire lifting adjustment structure also includes a side pressure roller 95, which is rotatably connected to the fixed base. The roller surface of the side pressure roller 95 is used to contact the window frame to reduce friction.

[0069] During the window sash lifting process, the roller surface of the side pressure roller 95 remains in contact with the guide rail of the window frame. When the window sash undergoes lateral displacement, the side pressure roller 95 converts sliding friction into rolling friction through rotation. When the fixed base is subjected to the tension of the flexible traction member 10, the lateral pressure exerted by the side pressure roller 95 on the window frame is limited to the roller surface contact area, thereby avoiding direct friction between the window sash and the window frame.

[0070] Traditional electric sliding windows rely on a motor to drive a transmission rod and rack, requiring an additional transmission mechanism and rack guide rail, resulting in a complex structure and high cost. This solution integrates driving and displacement compensation functions into a single component through the axial linkage mechanism between the winding wheel 20 and the sliding mating part 40, eliminating intermediate transmission links and simplifying the overall structure. Simultaneously, the adaptive sliding characteristic of the winding wheel 20 directly solves the problem of misalignment of the flexible traction part 10, eliminating the need for additional guiding devices and further reducing installation complexity.

[0071] Through the above technical solution, this application simplifies the structure of the electric lifting window drive system, reduces installation costs, and ensures that the flexible traction component 10 is always wound in the correct position during the lifting and lowering process through the axial displacement compensation mechanism of the winding wheel 20, avoiding jamming or wear caused by stacking, and improving the stability and reliability of window sash lifting.

[0072] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A lifting device for doors and windows, characterized in that, include: A flexible traction component, used to connect the window sash of a door or window; A winding wheel, used to retract and extend the flexible traction member to raise and lower the window sash; A rotary drive unit, wherein the output end of the rotary drive unit is provided with a transmission shaft, the transmission shaft being connected to one end of the winding wheel for driving the winding wheel to rotate; A sliding engagement component is provided, wherein the other end of the winding wheel is translatably connected to the sliding engagement component, which is used to drive the winding wheel to translate synchronously when the winding wheel rotates, so as to ensure that the flexible traction component is sequentially wound on the winding wheel.

2. The lifting device for doors and windows according to claim 1, characterized in that, The sliding engagement component is concentrically arranged with the transmission shaft. The sliding engagement component has a first thread structure, and the other end of the winding wheel has a second thread structure. The first thread structure and the second thread structure mesh with each other.

3. The lifting device for doors and windows according to claim 2, characterized in that, The thread pitch of the first thread structure is the same as that of the second thread structure, and the thread pitch of the first thread structure is greater than or equal to the diameter of the flexible traction member.

4. The lifting device for doors and windows according to claim 1, characterized in that, The lifting device for doors and windows also includes a concentric shaft, which is concentrically arranged with the transmission shaft and the sliding fit member, and the concentric shaft passes through the transmission shaft and the sliding fit member.

5. The lifting device for doors and windows according to claim 4, characterized in that, One end of the concentric shaft is fixedly connected to one end of the transmission shaft, and the other end of the transmission shaft is opposite to one end of the sliding fit member. The other end of the concentric shaft is rotatably connected to the other end of the sliding fit member. The outer wall of the concentric shaft is provided with a groove, and a ball bearing is provided between the groove and the inner wall of the sliding fit member.

6. The lifting device for doors and windows according to claim 1, characterized in that, The lifting device for doors and windows also includes a mounting base. The mounting base is provided with a first bearing groove, a second bearing groove, and a winding receiving groove. The first bearing groove and the second bearing groove are respectively located at both ends of the mounting base. The winding receiving groove is located between the first bearing groove and the second bearing groove. One end of the drive shaft is rotatably connected to the first bearing groove, and the other end of the sliding fitting is fixedly connected to the second bearing groove. The winding wheel is placed in the winding receiving groove.

7. The lifting device for doors and windows according to claim 6, characterized in that, The mounting base includes a first base body and a second base body. The first base body has a first arc-shaped groove, and the second base body has a second arc-shaped groove. The first arc-shaped groove and the second arc-shaped groove are joined together to form the winding receiving groove. The shape of the winding receiving groove is adapted to the shape of the winding wheel, and the distance between the inner wall of the winding receiving groove and the outer wall of the winding wheel is greater than zero and less than the diameter of the flexible traction member.

8. The lifting device for doors and windows according to claim 1, characterized in that, The lifting device for doors and windows also includes a guide pulley and a guide seat. The guide pulley is rotatably connected to the guide seat, and the guide seat is provided with a guide groove that limits the movement of the flexible traction member.

9. The lifting device for doors and windows according to claim 1, characterized in that, The lifting device for doors and windows also includes a wire lifting adjustment structure, which is located on both sides of the window sash. One end of the flexible traction member is connected to the winding wheel, and the other end of the flexible traction member is connected to the wire lifting adjustment structure.

10. A door or window, characterized in that, It includes a window frame and a window sash, and a lifting device for doors and windows as described in any one of claims 1-9 is provided between the window frame and the window sash.

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