A dual-drive device for lifting windows

Abstract

This utility model belongs to the field of building door and window technology, and particularly relates to a dual transmission device for lifting windows, including a drive mechanism, a first transmission mechanism, and a second transmission mechanism. The drive mechanism includes a drive motor, a worm gear, a worm wheel, and a drive shaft. The dual transmission device for lifting windows provided in this application adopts a double-chain transmission structure. The first chain and the second chain simultaneously carry the movable window, distributing the load-bearing force and reducing safety hazards. It adopts a single-motor transmission structure, in which the drive motor drives the worm gear, worm wheel, drive shaft, first sprocket, and second sprocket to rotate, thereby driving the first chain and the second chain to move up and down, thus driving the movable window to move up and down. The single-motor system has low cost, simple control, and effectively ensures synchronous lifting. The worm gear and worm wheel mesh to form a self-locking structure, which can fix the movable window at any position, making the positioning more reliable and effectively preventing the movable window from falling due to its own weight.

Description

Technical Field

[0001] This utility model belongs to the field of building door and window technology, and in particular relates to a dual transmission device for lifting windows. Background Technology

[0002] Roller windows are widely used in the construction industry due to their advantages such as large ventilation area and small space occupation. The transmission device of the roller window, as the power structure of the window, plays a crucial role; however, existing roller window transmission devices have the following shortcomings:

[0003] 1. Existing window lift transmission devices use a single transmission path (such as a single-sided chain or gear), which results in the single-sided chain bearing too much load. Once it breaks or wears out, it can easily cause the window to jam or even fall, posing a significant safety hazard.

[0004] 2. The existing lifting window transmission device uses a dual-motor system, which is costly and complex to control, and is prone to asynchronous lifting due to differences in motors;

[0005] 3. The existing lifting window transmission components use a gear structure for positioning. The gear structure is prone to tooth breakage, making positioning unreliable and easily causing the window to fall due to its own weight. Utility Model Content

[0006] The purpose of this utility model is to provide a dual-drive device for lifting windows, which aims to solve the technical problems of significant safety hazards, asynchronous lifting, and unreliable positioning in the prior art.

[0007] To achieve the above objectives, the present invention provides a dual transmission device for raising and lowering windows, comprising a drive mechanism, a first transmission mechanism, and a second transmission mechanism. The drive mechanism is connected to the first transmission mechanism and the second transmission mechanism respectively, and drives the first transmission mechanism and the second transmission mechanism to move up and down.

[0008] The drive mechanism includes a transmission motor, a worm gear, a worm wheel, and a transmission optical shaft. The worm gear is fixed to the transmission motor and meshes with the worm wheel. The transmission optical shaft is sequentially fixed through the worm wheel, the first transmission mechanism, and the second transmission mechanism.

[0009] The first transmission mechanism includes a first sprocket and a first chain. The transmission optical shaft is fixedly inserted through the first sprocket, and the first chain is sleeved on the outside of the first sprocket.

[0010] The second transmission mechanism includes a second sprocket and a second chain. The transmission optical shaft is fixedly inserted through the second sprocket, and the second chain is sleeved on the outside of the second sprocket.

[0011] As an optional solution of this utility model, the drive mechanism further includes a reduction gearbox, and the transmission motor is fixedly connected to the reduction gearbox.

[0012] As an optional solution of this utility model, the first transmission mechanism further includes a driven sprocket, which is fixed to the gearbox; the first chain is sequentially sleeved on the outside of the first sprocket and the driven sprocket.

[0013] As an optional solution of this utility model, the first transmission mechanism further includes a first counterweight rod, which is fixedly connected to one end of the first chain.

[0014] As an optional solution of this utility model, the second transmission mechanism further includes a second counterweight rod, which is fixedly connected to one end of the second chain.

[0015] As an optional solution of this utility model, the first sprocket and the second sprocket are arranged in parallel and opposite directions, and are arranged on the same horizontal plane.

[0016] As an optional solution of this utility model, the worm and the worm wheel are engaged and connected to form a self-locking structure.

[0017] The above-mentioned technical solutions of one or more of the dual transmission devices for lifting windows provided in this utility model embodiment have at least one of the following technical effects:

[0018] 1. The double-chain drive structure is adopted, with the first and second chains simultaneously supporting the movable window, which disperses the load and reduces safety hazards;

[0019] 2. A single-motor transmission structure is adopted, in which the transmission motor drives the worm gear, worm wheel, transmission shaft, first sprocket, and second sprocket to rotate, thereby driving the first chain and second chain to move up and down, which in turn drives the movable window to move up and down. The single-motor system is low-cost, simple to control, and effectively ensures synchronous lifting.

[0020] 3. The worm gear and worm wheel mesh to form a self-locking structure, which can fix the movable window in any position, making the positioning more reliable and effectively preventing the movable window from falling due to its own weight. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1A perspective view of a dual-drive device for raising and lowering windows provided in an embodiment of this utility model.

[0023] Figure 2 A perspective view of the dual transmission device for raising and lowering windows provided in this embodiment of the utility model, omitting the gearbox.

[0024] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0025] Figure 4 A front view of the worm gear and worm shaft meshing state of a dual transmission device for raising and lowering windows provided in an embodiment of this utility model.

[0026] Figure 5 A front view of the worm gear of a dual-drive device for raising and lowering windows provided in an embodiment of this utility model.

[0027] The following are the labeling elements in the figure:

[0028] 1. Drive mechanism; 2. First transmission mechanism; 3. Second transmission mechanism; λ, lead angle; ρ, equivalent friction angle;

[0029] 11. Drive motor; 12. Worm gear; 13. Worm wheel; 14. Drive shaft; 15. Gearbox;

[0030] 21. First sprocket; 22. First chain; 23. Driven sprocket; 24. First counterweight bar;

[0031] 31. Second sprocket; 32. Second chain; 33. Second counterweight bar. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0033] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of 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. Therefore, they should not be construed as limitations on this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0036] In one embodiment of this utility model, such as Figures 1-5 As shown, a dual transmission device for raising and lowering windows is provided, including a drive mechanism 1, a first transmission mechanism 2, and a second transmission mechanism 3. The drive mechanism 1 is connected to the first transmission mechanism 2 and the second transmission mechanism 3 respectively, and drives the first transmission mechanism 2 and the second transmission mechanism 3 to move up and down.

[0037] The drive mechanism 1 includes a drive motor 11, a worm gear 12, a worm wheel 13, and a drive shaft 14. The worm gear 12 is fixed to the drive motor 11 and meshes with the worm wheel 13. The drive shaft 14 is sequentially fixed through the worm wheel 13, the first drive mechanism 2, and the second drive mechanism 3.

[0038] The first transmission mechanism 2 includes a first sprocket 21 and a first chain 22. The transmission optical shaft 14 is fixedly inserted through the first sprocket 21, and the first chain 22 is sleeved on the outside of the first sprocket 21.

[0039] The second transmission mechanism 3 includes a second sprocket 31 and a second chain 32. The transmission optical shaft 14 is fixedly inserted through the second sprocket 31, and the second chain 32 is sleeved on the outside of the second sprocket 31.

[0040] In another embodiment of the present invention, the drive mechanism 1 further includes a reduction gearbox 15, and the drive motor 11 is fixedly connected to the reduction gearbox 15.

[0041] In another embodiment of the present invention, the first transmission mechanism 2 further includes a driven sprocket 23, which is fixed to the gearbox 15; the first chain 22 is sequentially sleeved on the outside of the first sprocket 21 and the driven sprocket 23.

[0042] In another embodiment of the present invention, the first transmission mechanism 2 further includes a first counterweight rod 24, which is fixedly connected to one end of the first chain 22.

[0043] In another embodiment of the present invention, the second transmission mechanism 3 further includes a second counterweight rod 33, which is fixedly connected to one end of the second chain 32.

[0044] In another embodiment of this utility model, the first sprocket 21 and the second sprocket 31 are arranged in parallel and opposite directions, and are arranged on the same horizontal plane.

[0045] In another embodiment of this utility model, the worm 12 and the worm wheel 13 are engaged and connected to form a self-locking structure.

[0046] The dual-drive device for lifting windows provided in this application adopts a dual-chain drive structure, and its working process is as follows:

[0047] Power input phase:

[0048] The drive mechanism 1 is fixed inside the window frame; the drive motor 11 can be a servo motor. After receiving the signal, the worm gear 12 rotates and outputs torque to mesh with the worm wheel 13. The worm wheel 13 is fixed to the drive optical shaft 14, and the drive optical shaft 14 rotates.

[0049] Transmission stage:

[0050] The rotation of the transmission shaft 14 drives the symmetrically fixed first sprocket 21 and second sprocket 31 to rotate; the first sprocket 21 meshes with the first chain 22, and the second sprocket 31 meshes with the second chain 32, realizing the lifting and lowering movement of the first chain 22 and the second chain 32; one end of the first chain 22 is fixedly connected to the movable window through the first window sash mounting plate, and the other end is fixedly connected to the first counterweight rod 24; one end of the second chain 32 is fixedly connected to the movable window through the second window sash mounting plate, and the other end is fixedly connected to the second counterweight rod 33. Fixed connection; when the first sprocket 21 engages the open-ring first chain 22 and the second sprocket 31 engages the open-ring second chain 32, the first chain 22 and the second chain 32 move along the guide groove on the inner side of the window frame; then the first chain 22 drives the first window sash mounting plate to rise and fall, and the second chain 32 drives the second window sash mounting plate to rise and fall, thereby realizing the raising and lowering of the movable window; the first sprocket 21 and the second sprocket 31 are both fixed to the same transmission optical shaft 14, which can effectively ensure the synchronous operation of the first chain 22 and the second chain 32 on both sides.

[0051] The lifting and lowering stage of the operable window:

[0052] One side of the movable window is connected to the first chain 22 via the first window sash mounting plate, and the other side is connected to the second chain 32 via the second window sash mounting plate. The transmission of the first chain 22 and the second chain 32 ultimately realizes the raising and lowering (closing and opening) of the movable window.

[0053] The movable window moves vertically up and down under the constraint of the guide groove, which also limits the lateral offset of the window sash.

[0054] Positioning the self-locking phase:

[0055] like Figure 4-5 As shown, after the movable window reaches the target position or stops, when the lead angle λ of the worm 12 is less than or equal to the equivalent friction angle ρ, the transmission mechanism satisfies the self-locking condition. At this time, the frictional force generated on the helical surface of the worm 12 by the reverse driving force applied by the worm wheel 13 is greater than the axial component force, and cannot push the worm 12 to rotate. Mechanically, the reverse driving force is self-balanced under friction. This restricts the rotation of the first sprocket 21 and the second sprocket 31 caused by the gravity of the movable window, thus preventing the movable window from sliding down and achieving self-locking of the entire transmission mechanism.

[0056] Lead angle λ: The angle between the worm 12 thread and the end face (the plane perpendicular to the axis); this angle is equivalent to the inclination angle of the inclined plane; the smaller the lead angle, the gentler the inclined plane.

[0057] The equivalent friction angle ρ is determined by the friction coefficient μ between the materials of the worm gear 13 and the worm 12, satisfying ρ=arctan(μ). It measures the intensity of the frictional force.

[0058] Detailed explanation of technical principles:

[0059] Mechanical advantages of chain drives:

[0060] High rigidity load transmission: Each link of the first chain 22 and the second chain 32 precisely meshes with the teeth of the first sprocket 21 and the second sprocket 31, avoiding the window sash sinking caused by the elastic deformation of traditional ropes;

[0061] Dual-sided synchronous control: The symmetrically arranged first chain 22 and second chain 32 drive the first sprocket 21 and second sprocket 31 through a high-precision transmission motor 11 to achieve force couple balance and eliminate the risk of window sash tilting.

[0062] The self-locking principle is based on the principle that the lead angle λ ≤ the friction angle ρ. This makes the transmission act like a slightly inclined plane, where friction prevents reverse movement. The entire transmission mechanism does not require additional brakes or braking devices. By utilizing the self-locking principle of the worm gear 13 and worm 12 inside the gearbox 15, the entire movable window can be positioned and stopped at any position during the lifting and lowering process, achieving self-locking of the entire transmission mechanism.

[0063] The dual-drive device for lifting windows provided in this application adopts a dual-chain drive structure. The first chain 22 and the second chain 32 simultaneously carry the movable window, distributing the load and reducing safety hazards. A single-motor drive structure is adopted, in which the drive motor 11 drives the worm gear 12, worm wheel 13, drive shaft 14, first sprocket 21, and second sprocket 31 to rotate, thereby driving the first chain 22 and the second chain 32 to move up and down, thus driving the movable window to move up and down. The single-motor system is low-cost, simple to control, and effectively ensures synchronous lifting. The worm gear 12 and worm wheel 13 mesh to form a self-locking structure, which can fix the movable window at any position, making the positioning more reliable and effectively preventing the movable window from falling due to its own weight.

[0064] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual-drive device for raising and lowering windows, characterized in that, It includes a drive mechanism, a first transmission mechanism, and a second transmission mechanism. The drive mechanism is connected to the first transmission mechanism and the second transmission mechanism respectively, and drives the first transmission mechanism and the second transmission mechanism to move up and down. The drive mechanism includes a transmission motor, a worm gear, a worm wheel, and a transmission optical shaft. The worm gear is fixed to the transmission motor and meshes with the worm wheel. The transmission optical shaft is sequentially fixed through the worm wheel, the first transmission mechanism, and the second transmission mechanism. The first transmission mechanism includes a first sprocket and a first chain. The transmission optical shaft is fixedly inserted through the first sprocket, and the first chain is sleeved on the outside of the first sprocket. The second transmission mechanism includes a second sprocket and a second chain. The transmission optical shaft is fixedly inserted through the second sprocket, and the second chain is sleeved on the outside of the second sprocket.

2. The dual-drive device for raising and lowering windows according to claim 1, characterized in that, The drive mechanism also includes a reduction gearbox, and the drive motor is fixedly connected to the reduction gearbox.

3. A dual-drive device for raising and lowering windows according to claim 2, characterized in that, The first transmission mechanism further includes a driven sprocket, which is fixed to the gearbox; the first chain is sequentially sleeved on the outside of the first sprocket and the driven sprocket.

4. A dual-drive device for raising and lowering windows according to claim 1, characterized in that, The first transmission mechanism further includes a first counterweight rod, which is fixedly connected to one end of the first chain.

5. A dual-drive device for raising and lowering windows according to claim 1, characterized in that, The second transmission mechanism also includes a second counterweight rod, which is fixedly connected to one end of the second chain.

6. A dual-drive device for raising and lowering windows according to claim 1, characterized in that, The first sprocket and the second sprocket are arranged in parallel and opposite directions, and are positioned on the same horizontal plane.

7. A dual-drive device for raising and lowering windows according to claim 1, characterized in that, After the worm and the worm wheel mesh and connect, a self-locking structure is formed.

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