A lifting arm structure for a movable sash window

Abstract

This utility model discloses a lifting arm structure for a movable sash of a lift-up window, including an upper arm and a lower arm. The upper end of the upper arm has a chain groove for chain insertion, and the lower end of the upper arm is symmetrically and detachably fitted with first sliding wheels. The surface of the lower arm is symmetrically and detachably fitted with second sliding wheels. This utility model relates to the field of door and window hardware technology. This lifting arm structure for a movable sash of a lift-up window, through the chain groove in the upper arm for chain engagement and the removal of the sliding wheels, achieves quick assembly, disassembly, and maintenance, improving ease of use. The anti-slip texture on the inner wall of the chain groove effectively prevents the chain from slipping out, enhancing structural stability. Furthermore, the sliding wheels made of polyurethane elastomer material reduce noise and vibration, improving the user experience.

Description

Technical Field

[0001] This utility model relates to the field of door and window hardware technology, specifically to a lifting arm structure for a movable sash of a lift window. Background Technology

[0002] Currently, lift-up windows are a common type of building window, and the raising and lowering of their movable sashes is usually achieved through a lifting arm structure. Traditional lift-up window movable sash lifting arm structures mostly adopt a fixed design, which presents many inconveniences in use and maintenance.

[0003] In existing technologies, the connection between the lifting arm and the drive chain is mostly fixed by welding or riveting. Although this connection method is simple in structure, it has obvious drawbacks in practical use: when the chain wears or is damaged due to long-term use, replacement is extremely difficult, often requiring disassembly of the entire lifting arm structure, and even requiring specialized technicians, increasing maintenance and time costs. At the same time, stress concentration is prone to occur at the welded or riveted joints, which may lead to cracks or breaks under long-term heavy operation, affecting service life.

[0004] In addition, the fit between the sliding wheels of the traditional lifting arm and the window frame guide rail is often not optimized, which can easily generate noise and vibration during operation, affecting user comfort. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a lifting arm structure for a movable sash of a lifting window, which solves problems such as inconvenient disassembly and difficult maintenance.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a lifting arm structure for a movable sash of a lifting window, comprising an upper arm and a lower arm, wherein the upper end of the upper arm is provided with a chain groove for chain insertion, the lower end of the upper arm is symmetrically and detachably equipped with a first sliding wheel, and the surface of the lower arm is symmetrically and detachably equipped with a second sliding wheel, which facilitates replacement and maintenance.

[0007] Preferably, the surfaces of the upper arm and the lower arm are provided with openings, which provide rolling space for the first sliding wheel and the chain groove roller.

[0008] Preferably, the inner wall of the chain groove is provided with anti-slip texture to enhance the friction between the chain and the chain groove and prevent the chain from coming off.

[0009] Preferably, the upper arm and lower arm are made of aluminum alloy and the surface is anodized to improve corrosion resistance and wear resistance.

[0010] Preferably, the first and second sliding wheels include a metal wheel frame and rollers made of polyurethane elastomer material. The rollers are fixed to the metal wheel frame by an insert injection molding process to reduce noise and vibration during sliding.

[0011] This utility model provides a lifting arm structure for a movable sash of a lift window. Compared with the prior art, it has the following advantages: 1. The lifting arm structure of this lifting window movable sash, through the cooperation of the U-shaped chain groove opened in the upper arm and the anti-slip texture of the inner wall, realizes the quick insertion of the chain and effectively prevents it from falling off; combined with the detachable installation method of the sliding wheel, it realizes the quick disassembly and maintenance of the entire lifting arm structure, which greatly improves the convenience of use and maintenance efficiency.

[0012] 2. The lifting arm structure of this movable sash window reduces noise and vibration through sliding wheels made of polyurethane elastomer material, thus improving the user experience. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a three-dimensional schematic diagram of the structure of this utility model; Figure 4 This is a three-dimensional back view of the structure of this utility model; Figure 5 This is a second schematic diagram of the structure of this utility model; Figure 6 This is a second side view of the structure of this utility model; Figure 7 This is a second three-dimensional schematic diagram of the structure of this utility model; Figure 8 This is a schematic diagram of the second rear side of the structure of this utility model.

[0014] In the diagram: 1. Upper arm; 11. First pulley; 12. Chain groove; 2. Lower arm; 21. Second pulley. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0016] Please see Figures 1 to 4This embodiment provides a lifting arm structure for a movable sash of a lifting window, including an upper arm 1 and a lower arm 2. The upper arm 1 and the lower arm 2 are made of aluminum alloy material by extrusion molding, and the surface is anodized to form an oxide film, which significantly improves corrosion resistance and wear resistance.

[0017] and Figures 1 to 4 The upper arm 1 and lower arm 2 are suitable for conventional window profiles.

[0018] The upper end of the upper arm 1 is machined with a chain groove 12 for chain insertion, which facilitates the installation of the chain and makes it easy to install and disassemble. The chain groove 12 has a U-shaped structure and can hold 1-2 chains. The inner wall of the chain groove 12 is provided with anti-slip texture. The texture is a cross-mesh structure, which can effectively enhance the friction between the chain and the chain groove 12 and prevent the chain from coming off during operation.

[0019] The lower end of the upper arm 1 is symmetrically provided with threaded holes for mounting the first sliding wheel 11 with stainless steel screws. The first sliding wheel 11 consists of a metal wheel frame and a roller. The roller is made of polyurethane elastomer material and is encapsulated on the wheel frame by an insert injection molding process. The polyurethane elastomer material has both good wear resistance and shock absorption and noise reduction performance, which can effectively reduce noise and vibration during sliding.

[0020] The lower arm 2 has symmetrically arranged threaded holes on its surface for mounting the second sliding wheel 21 with stainless steel screws. The second sliding wheel 21 is made of the same material and structure as the first sliding wheel 11.

[0021] The upper arm 1 and the lower arm 2 are directly bolted to both sides of the window.

[0022] Both the upper arm 1 and the lower arm 2 have openings on their surfaces, providing ample space for the sliding wheels to roll.

[0023] Assembly process: First, assemble the upper arm 1 and lower arm 2 into a lifting arm unit. Two such units are needed for each set of windows. Use stainless steel screws to install the assembled lifting arm units onto the upper and lower ends of the left and right sides of the door and window frames, respectively.

[0024] Then, the first sliding wheel 11 is installed at the designated position on the upper arm 1 with stainless steel screws, and the second sliding wheel 21 is installed on the lower arm 2 in the same way, and anti-loosening washers are used to prevent loosening.

[0025] The rollers of the first sliding wheel 11 and the second sliding wheel 21 of the installed lifting arm unit are accurately inserted into the inner wall groove of the window profile so that they fit together in contact.

[0026] Finally, a drive assembly is installed on the top of the profile. The drive assembly consists of a motor and a drive base, and a chain is installed on the drive base. One end of the drive chain is engaged in the chain groove 12 of the upper arm 1, and the anti-slip texture 121 is used to ensure a reliable connection. The other end is connected to a counterweight, and the weight of the counterweight is 1.2 times the weight of the window sash.

[0027] Work process: When the window needs to be opened, the drive assembly is activated, the motor rotates forward to drive the chain to move, the chain drives the upper arm 1 to move upward through the chain groove 12, and the counterweight end moves downward accordingly. During this process, the first sliding wheel 11 and the second sliding wheel 21 on the upper arm 1 and the lower arm 2 slide smoothly along the profile slide groove, driving the window sash to rise smoothly.

[0028] When the window needs to be closed, the motor reverses, the chain moves in the opposite direction, and the window sash descends smoothly. Throughout the process, the polyurethane elastomer material of the sliding wheels effectively reduces operating noise.

[0029] Maintenance and upkeep: When the pulley is worn and needs to be replaced, it can be quickly replaced simply by removing the mounting screws. There is no need to disassemble the entire lifting arm structure. Regularly check the wear of the chain groove 12. If the wear exceeds 50%, replace the upper arm 1. Example

[0030] Please see Figures 5 to 8 This is the second type of lifting arm structure, and... Figures 1 to 4 The upper arm 1 and lower arm 2 are different in shape. The surface thickness of the upper arm 1 and lower arm 2, which are equipped with the first sliding wheel 11 and the second sliding wheel 21, is smaller. The second type is suitable for window profiles with smaller inner walls, but both are equipped with chain groove 12, first sliding wheel 11, second sliding wheel 21 and opening.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lifting arm structure for a movable sash of a lift window, comprising an upper arm (1) and a lower arm (2), characterized in that: The upper end of the upper arm (1) is provided with a chain groove (12) for chain insertion, and the lower end of the upper arm (1) is symmetrically and detachably equipped with a first sliding wheel (11). The lower arm (2) is symmetrically and detachably equipped with a second sliding wheel (21); The inner wall of the chain groove (12) is provided with anti-slip texture; The first sliding wheel (11) and the second sliding wheel (21) include a metal wheel frame and a roller made of polyurethane elastomer material. The roller is fixed to the metal wheel frame by an insert injection molding process.

2. The lifting arm structure for a movable sash of a liftable window according to claim 1, characterized in that: The surfaces of the upper arm (1) and the lower arm (2) are provided with openings.

3. The lifting arm structure for a movable sash of a lifting window according to claim 2, characterized in that: The opening is provided for the rolling space of the first sliding wheel (11) and the chain groove (12) roller.

4. The lifting arm structure for a movable sash of a lifting window according to claim 1, characterized in that: The anti-slip texture is a mesh or serrated texture.

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