A new lifting push-pull pulley device and door and window system

Abstract

This invention discloses a novel lifting and sliding pulley device and door / window system. The novel lifting and sliding pulley device includes a front pulley mechanism, which comprises a front lifting seat and a front lifting pulley assembly. The front lifting pulley assembly includes a front support, a front pulley, a front lifting wheel, and a front connecting rod traction structure. The front lifting wheel is rotatably mounted on the front lifting seat. One end of the front connecting rod traction structure is rotatably mounted on the front lifting seat, and the other end is rotatably connected to the front lifting wheel. The front lifting seat has a first oblique arc surface, and the front lifting wheel is rotatably mounted on this surface. When the front lifting wheel rolls from the highest point to the lowest point of the first oblique arc surface, the front connecting rod traction structure is in a folded state, and its lowest point does not protrude beyond the front lifting wheel. Therefore, it will not interfere with the lower rail, allowing for a smaller diameter of the front pulley and consequently a smaller overall size of the front pulley mechanism to accommodate extremely narrow frame profiles.

Description

Technical Field

[0001] This invention relates to the field of door and window technology, specifically to a novel lifting and sliding pulley device and door and window system. Background Technology

[0002] This section provides only background information related to this application to enable those skilled in the art to understand this application more thoroughly and accurately, and it is not necessarily prior art.

[0003] Existing lift-and-slide door and window systems utilize the principle of leverage. By rotating the handle, the transmission mechanism is activated, which in turn drives the pulley mechanism located at the bottom of the door to lift or lower the door, thus achieving the lifting or lowering of the door.

[0004] However, with the increasing use of lift-and-slide doors and windows, the varying sizes of the door panels, coupled with the widespread use of multi-layered glass, have resulted in door panels being generally quite heavy. When lifting the door, the weight of the panel makes it difficult for users to turn the handle, and it is prone to jamming.

[0005] To address these issues, some manufacturers have improved the pulley mechanism by using a lifting plate to pull a lifting wheel, causing it to roll and move on the lifting seat to raise or lower it. This reduces friction, making the entire lifting structure move more smoothly and requiring less effort. However, in practical use, it has been found that when the lifting plate pulls the lifting wheel to its lowest point, the bottom of the lifting plate protrudes beyond the wheel, making it prone to hitting the lower rail and causing interference. Therefore, a large-diameter pulley is needed to raise the lifting plate. However, using a large-diameter pulley increases the overall size of the pulley mechanism, making it unsuitable for ultra-narrow frame window and door profiles, and failing to meet the minimalist and aesthetic design requirements of modern architecture. Summary of the Invention

[0006] To overcome the shortcomings of the prior art, the present invention provides a novel lifting and pushing pulley device and door and window system. By employing a front linkage traction structure to pull the front lifting wheel to roll on the front lifting seat, when the front lifting wheel rolls to the lowest point of the first inclined arc surface, the front linkage traction structure is in a folded state and its lowest point does not protrude from the front lifting wheel. Therefore, it will not interfere with the lower rail. Thus, the diameter of the front pulley can be made smaller, thereby making the overall size of the front pulley mechanism smaller, which can then be adapted to door and window profiles with extremely narrow frames, meeting the needs of modern architecture for minimalist and aesthetically pleasing designs.

[0007] The technical solution adopted by this invention to solve its problem is: A novel lifting and pushing pulley device includes a front pulley mechanism, the front pulley mechanism comprising: Front lift bracket, used for installation at the bottom of the door leaf; A front lifting pulley assembly includes a front support, a front pulley, a front lifting wheel, and a front connecting rod traction structure. The front pulley and the front lifting wheel are both rotatably mounted in the front support. The front pulley is slidably mounted on a lower rail, and the front lifting wheel is rotatably mounted on the front lifting support. One end of the front connecting rod traction structure is rotatably mounted on the front lifting support, and the other end is rotatably connected to the front lifting wheel. The front lifting seat has a first oblique arc surface, and the front lifting wheel is rolled on the first oblique arc surface. When the front support moves left and right along the extension direction of the lower slide rail, the front lifting wheel can be rolled along the first oblique arc surface. When the front lifting wheel rolls from the highest point to the lowest point of the first oblique arc surface, the door completes the lifting action. At this time, the front connecting rod traction structure is in a folded state and its lowest point does not protrude from the front lifting wheel.

[0008] As an optional implementation, the front linkage traction structure includes a first linkage and a second linkage. One end of the first linkage is rotatably mounted on the front lifting seat, and the other end is rotatably connected to one end of the second linkage. The other end of the second linkage is rotatably connected to the front lifting wheel.

[0009] As an optional implementation, the second link is provided with a first limiting post. When the front lifting wheel is driven to roll from the lowest point to the highest point of the first inclined arc surface, the door leaf completes the lowering action, and the first limiting post on the second link abuts against the first link to achieve the limiting action.

[0010] As an optional implementation, the front support includes two front pulley fixing plates that are aligned and spaced apart from each other, and the front pulleys and the front lifting wheel are rotatably clamped between the two front pulley fixing plates.

[0011] As an optional implementation, it also includes a push-pull component, a corner component, and a connecting rod, wherein: The push-pull component is slidably mounted on the front lifting seat and is used for transmission connection with the transmission bar; The first end of the corner piece is rotatably mounted on the front lifting seat, the second end of the corner piece is rotatably connected to the push-pull piece, and the third end of the corner piece is rotatably connected to one end of the connecting rod. The other end of the connecting rod is connected to one end of the front bracket; When the push-pull member slides on the front lifting seat, the front bracket can be moved by the transmission of the corner member and the connecting rod in sequence.

[0012] As an optional implementation, a rear pulley mechanism is also included, the rear pulley mechanism comprising: Rear lift seat; A rear lifting pulley assembly includes a rear support, a rear pulley, a rear lifting wheel, and a rear connecting rod traction structure. The rear support and the front support are connected by a connecting rod. Both the rear pulley and the rear lifting wheel are rotatably mounted within the rear support. The rear pulley slides on a lower rail, and the rear lifting wheel rolls on the rear lifting support. One end of the rear connecting rod traction structure is rotatably mounted on the rear lifting support, and the other end is rotatably connected to the rear lifting wheel. The rear lifting seat has a second oblique arc surface, and the rear lifting wheel is rolled on the second oblique arc surface. When the front support moves left and right along the extension direction of the lower slide rail, the rear support can move left and right along the extension direction of the lower slide rail simultaneously, thereby causing the rear lifting wheel to roll along the second oblique arc surface. When the rear lifting wheel rolls from the highest point to the lowest point of the second oblique arc surface, the door leaf completes the lifting action. At this time, the rear linkage traction structure is in a folded state and its lowest point does not protrude from the rear lifting wheel.

[0013] As an optional implementation, the rear linkage traction structure includes a third link and a fourth link. One end of the third link is rotatably mounted on the rear lifting seat, and the other end of the third link is rotatably connected to one end of the fourth link. The other end of the fourth link is rotatably connected to the rear lifting wheel.

[0014] As an optional implementation, the fourth link is provided with a second limiting post. When the rear lifting wheel is driven to roll from the lowest point to the highest point of the second inclined arc surface, the door completes the lowering action, and the second limiting post on the fourth link abuts against the third link to achieve the limiting action.

[0015] As an optional implementation, the rear support includes two rear pulley fixing plates that are aligned and spaced apart from each other, and the rear pulleys and the rear lifting wheel are rotatably clamped between the two rear pulley fixing plates.

[0016] In addition, the present invention also provides a door and window system, including a door leaf, a lower slide rail disposed below the door leaf, and a novel lifting and pushing pulley device as described above disposed at the bottom of the door leaf.

[0017] In summary, the lifting and pushing pulley device and door and window system provided by the present invention have the following beneficial effects: (i) By using a front linkage traction structure to pull the front lifting wheel to roll on the front lifting seat, when the front lifting wheel rolls to the lowest point of the first inclined arc surface, the front linkage traction structure is in a folded state and its lowest point does not protrude from the front lifting wheel, so it will not interfere with the lower rail. Therefore, the diameter of the front pulley can be made smaller, and the overall size of the front pulley mechanism can be made smaller, thus adapting to the door and window profiles with extremely narrow frames and meeting the needs of modern buildings for minimalist and beautiful design.

[0018] (ii) The lifting and lowering of the front lifting pulley assembly is achieved by the front lifting wheel rolling displacement on the first inclined arc surface of the front lifting seat. This design effectively reduces the lifting slope by lengthening the lifting distance, making the operation easier for the user and the lifting movement smoother.

[0019] (iii) The diameter of the front lifting wheel can be designed to be relatively large, thereby increasing the lever arm and reducing the force required to lift the door leaf. At the same time, since the load-bearing method of the front lifting wheel is to transfer the weight to the first inclined arc surface, the lifting angle can be reduced by extending the length of the first inclined arc surface, thereby reducing the operating force required for lifting, and thus making it particularly suitable for lifting and pushing operations of heavy door leaves. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the novel lifting push-pull pulley device of the present invention; Figure 2 This is a schematic diagram of the front pulley mechanism in the novel lifting push-pull pulley device of the present invention; Figure 3 This is an exploded view of the front pulley mechanism in the novel lifting push-pull pulley device of the present invention; Figure 4 This is a schematic diagram of the front lifting seat in the front pulley mechanism of the present invention; Figure 5 This is a cross-sectional schematic diagram of the front pulley mechanism of the present invention in the retracted state; Figure 6 This is a cross-sectional schematic diagram of the front pulley mechanism of the present invention in the lifting state; Figure 7 This is a schematic diagram of the rear pulley mechanism in the novel lifting push-pull pulley device of the present invention; Figure 8 This is an exploded view of the rear pulley mechanism in the novel lifting push-pull pulley device of the present invention; Figure 9 This is a schematic diagram of the structure of the rear lifting seat in the rear pulley mechanism of the present invention; Figure 10 This is a cross-sectional schematic diagram of the rear pulley mechanism of the present invention in the retracted state; Figure 11 This is a cross-sectional schematic diagram of the rear pulley mechanism of the present invention in the lifting state; Figure 12 This is an exploded view of the door and window system of the present invention; Figure 13 This is a structural schematic diagram of the door and window system of the present invention.

[0021] The meanings of the reference numerals in the attached figures are as follows: 1. Front pulley mechanism; 11. Front lifting seat; 111. Front seat body; 112. Front support leg; 113. First inclined arc surface; 12. Front lifting pulley assembly; 121. Front pulley fixing plate; 122. Front pulley; 123. Front lifting wheel; 124. First connecting rod; 125. Second connecting rod; 1251. First limiting post; 126. Front upper lifting pin; 127. Front middle lifting pin; 128. Front lower lifting pin; 129. Front pulley pin; 13. Push-pull component; 14. Corner component; 15. Connecting rod; 16. Front connector; 171. Corner pin; 172. Push-pull 1. Rod pin; 173. Pull rod pin; 174. Connecting rod pin; 2. Rear pulley mechanism; 21. Rear lifting seat; 211. Rear seat body; 212. Rear support leg; 213. Second oblique arc surface; 22. Rear lifting pulley assembly; 221. Rear pulley fixing plate; 222. Rear pulley; 223. Rear lifting wheel; 224. Third connecting rod; 225. Fourth connecting rod; 2251. Second limiting post; 226. Rear upper lifting pin; 227. Rear middle lifting pin; 228. Rear lower lifting pin; 229. Rear pulley pin; 23. Rear connector; 3. Connecting rod; 4. Door leaf; 5. Lower slide rail. Detailed Implementation

[0022] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0023] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship 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 module 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 invention.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0025] Example 1 See Figure 1-11The present invention first provides a novel lifting and pushing pulley device, including a front pulley mechanism 1, which includes a front lifting seat 11 and a front lifting pulley assembly 12. The front lifting seat 11 is used to install at the bottom of the door leaf 4. The front lifting pulley assembly 12 includes a front support, a front pulley 122, a front lifting wheel 123, and a front connecting rod traction structure. The front pulley 122 and the front lifting wheel 123 are both rotatably disposed in the front support. The front pulley 122 is used to slide on the lower rail 5, and the front lifting wheel 123 is rolled on the front lifting seat 11. One end of the front connecting rod traction structure is rotatably disposed on the front lifting seat 11, and the other end is rotatably connected to the front lifting wheel 123. The front lifting seat 11 has a first oblique arc surface 113, and the front lifting wheel 123 is rolled on the first oblique arc surface 113. When the front support moves left and right along the extension direction of the lower slide rail 5, the front lifting wheel 123 can be rolled along the first oblique arc surface 113. When the front lifting wheel 123 rolls from the highest point to the lowest point of the first oblique arc surface 113, the door leaf 4 completes the lifting action. When the front lifting wheel 123 rolls from the lowest point to the highest point of the first oblique arc surface 113, the door leaf 4 completes the sinking action.

[0026] When the lifting wheel 123 rolls from the highest point to the lowest point of the first inclined arc surface 113, the front connecting rod traction structure is in a folded state and its lowest point does not protrude from the front lifting wheel 123. That is, the height of the lowest point of the front connecting rod traction structure is higher than the height of the lowest point of the front lifting wheel 123. Therefore, it will not interfere with the lower rail 5. Thus, the diameter of the front pulley 122 can be made smaller, thereby making the overall size of the front pulley mechanism 1 smaller, which can then be adapted to the door and window profiles with extremely narrow frames, meeting the needs of modern buildings for minimalist and beautiful design.

[0027] Secondly, the lifting and lowering of the front lifting pulley assembly 12 is achieved by driving the front lifting wheel 123 to roll on the first inclined arc surface 113 of the front lifting seat 11. This is not sliding friction, so frictional resistance can be greatly reduced, improving the operating feel. Compared with the traditional lifting wheel rolling in a circle, this design effectively reduces the lifting slope by lengthening the lifting distance, making the operation easier for the user and the lifting movement smoother. At the same time, the diameter of the front lifting wheel 123 can be designed to be relatively large, thereby increasing the lever arm and reducing the force required to push the door leaf 4 to lift. In addition, since the load-bearing method of the front lifting wheel 123 is to transfer the weight to the first inclined arc surface 113, the lifting angle can be reduced by extending the length of the first inclined arc surface 113, further reducing the operating force required for lifting, thus making it particularly suitable for the lifting and pushing operation of heavy door leaf 4.

[0028] Furthermore, by changing the length or curvature of the first inclined arc surface 113, the rolling stroke of the front lifting wheel 123 can be adjusted, thereby controlling the lifting or lowering height of the door leaf 4. Therefore, the lifting amount can be flexibly adjusted according to the sealing requirements of different door leaves 4 and the depth of the lower slide rail 5, greatly improving the versatility and adaptability of the product, making it suitable for various door and window specifications 4.

[0029] Specifically, the front linkage traction structure includes a first link 124 and a second link 125. One end of the first link 124 is rotatably mounted on the front lifting seat 11, and the other end of the first link 124 is rotatably connected to one end of the second link 125. The other end of the second link 125 is rotatably connected to the front lifting wheel 123.

[0030] Thus, when the front lifting wheel 123 rolls to the lowest point of the first inclined arc surface 113, the first connecting rod 124 and the second connecting rod 125 can be folded and stored within the height range of the front lifting wheel 123, avoiding the exposure or protrusion of the second connecting rod 125, so that the entire front lifting pulley assembly 12 can be made thinner and smaller, and can be adapted to door and window profiles with extremely narrow frames.

[0031] In this embodiment, one end of the first link 124 is hinged to the front lifting seat 11 via the front upper lifting pin 126, and the other end of the first link 124 is hinged to one end of the second link 125 via the front middle lifting pin 127. The other end of the second link 125 is hinged to the front lifting wheel 123 via the front lower lifting pin 128.

[0032] Furthermore, the second link 125 is provided with a first limiting post 1251. When the front lifting wheel 123 is driven to roll from the lowest point to the highest point of the first inclined arc surface, the door leaf 4 completes the descent action. The first limiting post 1251 on the second link 125 abuts against the first link 124 to achieve the limiting action, thereby ensuring that it always rolls along the predetermined trajectory on the first inclined arc surface 113.

[0033] See also Figure 3 The front support includes two front pulley fixing plates 121 aligned and spaced apart from each other. The front pulley 122 and the front lifting wheel 123 are rotatably clamped between the two front pulley fixing plates 121. Specifically, the front pulley 122 is rotatably mounted on the two front pulley fixing plates 121 via a front pulley pin 129, and the front lifting wheel 123 is rotatably mounted on the two front pulley fixing plates 121 via a front lower lifting pin 128.

[0034] There are two front pulleys 122, which are spaced apart on both sides of the front lifting wheel 123. There are two second connecting rods 125 and two front lifting wheels 123. The two second connecting rods 125 are located on the left and right sides of the first connecting rod 124, and the two front lifting wheels 123 are located on the outside of the two second connecting rods 125 respectively.

[0035] In an embodiment of the present invention, the front lifting seat 11 includes a front seat body 111 and a front support leg 112. The front seat body 111 and the front support leg 112 are arranged perpendicularly to each other, and the first oblique arc surface 113 is formed at the angle between the front seat body 111 and the front support leg 112.

[0036] Furthermore, the front pulley mechanism 1 also includes a push-pull member 13, a corner member 14, and a connecting rod 15. The push-pull member 13 is slidably mounted on the front lifting seat 11 and is used for transmission connection with the transmission bar. The first end of the corner member 14 is rotatably mounted on the front lifting seat 11, the second end of the corner member 14 is rotatably connected to the push-pull member 13, and the third end of the corner member 14 is rotatably connected to one end of the connecting rod 15. The other end of the connecting rod 15 is connected to one end of the two front pulley fixing plates 121.

[0037] Thus, when the handle is rotated to drive the transmission bar to slide, the push-pull member 13 can be driven to slide on the front lifting seat 11, and then the front bracket can be driven to move through the transmission of the corner member 14 and the connecting rod 15 in sequence, and finally the front lifting wheel 123 can be driven to roll on the front lifting seat 11 along the first oblique arc surface 113.

[0038] In this embodiment, the first end of the corner piece 14 is hinged to the front lifting seat 11 by a corner pin 171, the second end of the corner piece 14 is hinged to the push-pull piece 13 by a push-pull rod pin 172, the third end of the corner piece 14 is hinged to one end of the connecting rod 15 by a pull rod pin 173, and the other end of the connecting rod 15 is connected to one end of the two front pulley fixing plates 121 by a connecting rod pin 174.

[0039] Additionally, it includes a front connector 16, which is connected to the other end of the two front pulley fixing plates 121.

[0040] See also Figure 7-11The novel lifting and pushing pulley device also includes a rear pulley mechanism 2, which includes a rear lifting seat 21 and a rear lifting pulley assembly 22. The rear lifting pulley assembly 22 includes a rear support, a rear pulley 222, a rear lifting wheel 223, and a rear connecting rod traction structure. The rear support and the front support are connected by a connecting rod 3. The rear pulley 222 and the rear lifting wheel 223 are rotatably mounted in the rear support. The rear pulley 222 is slidably mounted on the lower rail 5, and the rear lifting wheel 223 is rolled on the rear lifting seat 21. One end of the rear connecting rod traction structure is rotatably mounted on the rear lifting seat 21, and the other end is rotatably connected to the rear lifting wheel 223. The rear lifting seat 21 has a second inclined arc surface 213, and the rear lifting wheel 223 is rolled on the second inclined arc surface 213. When the front support moves left and right along the extension direction of the lower slide rail 5, the rear support can move left and right along the extension direction of the lower slide rail, thereby causing the rear lifting wheel 223 to roll along the second inclined arc surface 213. When the rear lifting wheel 223 rolls from the highest point to the lowest point of the second inclined arc surface 213, the door leaf 4 completes the lifting action. When the rear lifting wheel 223 rolls from the lowest point to the highest point of the second inclined arc surface 213, the door leaf 4 completes the sinking action.

[0041] Therefore, when the rear lifting wheel 223 rolls from the highest point to the lowest point of the second inclined arc surface 213, the rear connecting rod traction structure is in a folded state and its lowest point does not protrude from the rear lifting wheel 223. That is, the height of the lowest point of the rear connecting rod traction structure is higher than the height of the lowest point of the rear lifting wheel 223, so it will not interfere with the lower rail 5. Therefore, the diameter of the rear pulley 222 can be made smaller, so that the overall size of the rear pulley mechanism 2 can be made smaller, thereby adapting to the door and window profiles with extremely narrow frames and meeting the needs of modern buildings for minimalist and beautiful design.

[0042] Specifically, the rear linkage traction structure includes a third link 224 and a fourth link 225. One end of the third link 224 is rotatably mounted on the rear lifting seat 21, and the other end of the third link 224 is rotatably connected to one end of the fourth link 225. The other end of the fourth link 225 is rotatably connected to the rear lifting wheel 223.

[0043] Thus, when the rear lifting wheel 223 rolls to the lowest point of the second oblique arc surface 213, the third link 224 and the fourth link 225 can be folded and stored within the height range of the rear lifting wheel 223, avoiding the exposure or protrusion of the fourth link 225, so that the entire rear lifting pulley assembly 22 can be made thinner and smaller, and can be adapted to door and window profiles with extremely narrow frames.

[0044] In this embodiment, one end of the third link 224 is hinged to the rear lift seat 21 via the rear upper lifting pin 226, and the other end of the third link 224 is hinged to one end of the fourth link 225 via the rear middle lifting pin 227. The other end of the fourth link 225 is hinged to the rear lift wheel 223 via the rear lower lifting pin 228.

[0045] Furthermore, the fourth link 225 is provided with a second limiting post 2251. When the rear lifting wheel 223 rolls from the lowest point to the highest point of the second inclined arc surface 213, the door leaf 4 completes the descent action. The second limiting post 2251 on the fourth link 225 abuts against the third link 224 to achieve the limiting action, thereby ensuring that it always rolls along the predetermined trajectory on the second inclined arc surface 213.

[0046] See also Figure 8 The rear support includes two rear pulley fixing plates 221 aligned and spaced apart from each other. The rear pulley 222 and the rear lifting wheel 223 are rotatably clamped between the two rear pulley fixing plates 221. Specifically, the rear pulley 222 is rotatably mounted on the two rear pulley fixing plates 221 via a rear pulley pin 229, and the rear lifting wheel 223 is rotatably mounted on the two rear pulley fixing plates 221 via a rear lower lifting pin 228.

[0047] There are two rear pulleys 222, which are spaced apart on both sides of the rear lifting wheel 223. There are two fourth links 225 and two rear lifting wheels 223. The two fourth links 225 are located on the left and right sides of the third link 224, and the two rear lifting wheels 223 are located on the outside of the two fourth links 225.

[0048] In addition, it also includes a rear connector 23, which is connected to one end of the two rear pulley fixing plates 221; one end of the connecting rod 3 is connected to the front connector 16, and the other end of the connecting rod 3 is connected to the rear connector 23 to realize the transmission connection between the front pulley mechanism 1 and the rear pulley mechanism 2.

[0049] In this embodiment of the invention, the rear lifting seat 21 includes a rear seat body 211 and a rear support leg 212. The rear seat body 211 and the rear support leg 212 are arranged perpendicularly to each other, and the second oblique arc surface 213 is formed at the angle between the rear seat body 211 and the rear support leg 212.

[0050] Example 2 See Figure 12-13 The present invention also provides a door and window system, including a door leaf 4, a lower slide rail 5 disposed below the door leaf 4, and a novel lifting and pushing pulley device as described in Embodiment 1 disposed at the bottom of the door leaf 4; the novel lifting and pushing pulley device is slidably mounted on the lower slide rail 5 via a front pulley 122 and a rear pulley 222.

[0051] Therefore, the door and window system of the present invention adopts the novel lifting and pushing pulley device of Embodiment 1, which makes the lifting of the door leaf 4 smoother and less strenuous.

[0052] In summary, the lifting and pushing pulley device and door and window system provided by the present invention have the following beneficial effects: (i) By using a front linkage traction structure to pull the front lifting wheel 123 to roll on the front lifting seat 11, when the front lifting wheel 123 rolls to the lowest point of the first inclined arc surface 113, the front linkage traction structure is in a folded state and its lowest point does not protrude from the front lifting wheel 123, so it will not interfere with the lower rail 5. Therefore, the diameter of the front pulley 122 can be made smaller, thereby making the overall size of the front pulley mechanism 1 smaller, so as to adapt to the door and window profiles with extremely narrow frames and meet the needs of modern buildings for minimalist and beautiful design.

[0053] (ii) The front lifting pulley assembly 12 is raised and lowered by driving the front lifting wheel 123 to roll on the first inclined arc surface 113 of the front lifting seat 11. By increasing the lifting distance, the lifting slope is effectively reduced, making it easier for the user to operate and the lifting movement is smoother.

[0054] (iii) The diameter of the front lifting wheel 123 can be designed to be relatively large, thereby increasing the lever arm and reducing the force required to lift the door leaf 4. At the same time, since the load-bearing method of the front lifting wheel 123 is to transfer the weight to the first inclined arc surface 113, the lifting angle can be reduced by extending the length of the first inclined arc surface 113, thereby reducing the operating force required for lifting, and thus making it particularly suitable for lifting and pushing the heavy door leaf 4.

[0055] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0056] It should be understood that the terms "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the module 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 the present invention.

[0057] Furthermore, in the description of this invention, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0058] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A novel lifting push-pull pulley device, comprising a front pulley mechanism, characterized in that, The front pulley mechanism includes: Front lift bracket, used for installation at the bottom of the door leaf; A front lifting pulley assembly includes a front support, a front pulley, a front lifting wheel, and a front connecting rod traction structure. The front pulley and the front lifting wheel are both rotatably mounted in the front support. The front pulley is slidably mounted on a lower rail, and the front lifting wheel is rotatably mounted on the front lifting support. One end of the front connecting rod traction structure is rotatably mounted on the front lifting support, and the other end is rotatably connected to the front lifting wheel. The front lifting seat has a first oblique arc surface, and the front lifting wheel is rolled on the first oblique arc surface. When the front support moves left and right along the extension direction of the lower slide rail, the front lifting wheel can be rolled along the first oblique arc surface. When the front lifting wheel rolls from the highest point to the lowest point of the first oblique arc surface, the door completes the lifting action. At this time, the front connecting rod traction structure is in a folded state and its lowest point does not protrude from the front lifting wheel.

2. The novel lifting push-pull pulley device according to claim 1, characterized in that, The front linkage traction structure includes a first link and a second link. One end of the first link is rotatably mounted on the front lifting seat, and the other end is rotatably connected to one end of the second link. The other end of the second link is rotatably connected to the front lifting wheel.

3. The novel lifting push-pull pulley device according to claim 2, characterized in that, The second link has a first limiting post protruding from it. When the front lifting wheel is driven to roll from the lowest point to the highest point of the first inclined arc surface, the door completes the descent action, and the first limiting post on the second link abuts against the first link to achieve the limiting action.

4. The novel lifting push-pull pulley device according to any one of claims 1-3, characterized in that, The front support includes two front pulley fixing plates that are aligned and spaced apart from each other, and the front pulley and the front lifting wheel are rotatably clamped between the two front pulley fixing plates.

5. The novel lifting push-pull pulley device according to any one of claims 1-3, characterized in that, It also includes push-pull components, corner components, and connecting rods, among which: The push-pull component is slidably mounted on the front lifting seat and is used for transmission connection with the transmission bar; The first end of the corner piece is rotatably mounted on the front lifting seat, the second end of the corner piece is rotatably connected to the push-pull piece, and the third end of the corner piece is rotatably connected to one end of the connecting rod. The other end of the connecting rod is connected to one end of the front bracket; When the push-pull member slides on the front lifting seat, the front bracket can be moved by the transmission of the corner member and the connecting rod in sequence.

6. The novel lifting push-pull pulley device according to any one of claims 1-3, characterized in that, It also includes a rear pulley mechanism, which comprises: Rear lift seat; A rear lifting pulley assembly includes a rear support, a rear pulley, a rear lifting wheel, and a rear connecting rod traction structure. The rear support and the front support are connected by a connecting rod. Both the rear pulley and the rear lifting wheel are rotatably mounted within the rear support. The rear pulley slides on a lower rail, and the rear lifting wheel rolls on the rear lifting support. One end of the rear connecting rod traction structure is rotatably mounted on the rear lifting support, and the other end is rotatably connected to the rear lifting wheel. The rear lifting seat has a second oblique arc surface, and the rear lifting wheel is rolled on the second oblique arc surface. When the front support moves left and right along the extension direction of the lower slide rail, the rear support can move left and right along the extension direction of the lower slide rail simultaneously, thereby causing the rear lifting wheel to roll along the second oblique arc surface. When the rear lifting wheel rolls from the highest point to the lowest point of the second oblique arc surface, the door leaf completes the lifting action. At this time, the rear linkage traction structure is in a folded state and its lowest point does not protrude from the rear lifting wheel.

7. The novel lifting push-pull pulley device according to claim 6, characterized in that, The rear linkage traction structure includes a third link and a fourth link. One end of the third link is rotatably mounted on the rear lifting seat, and the other end of the third link is rotatably connected to one end of the fourth link. The other end of the fourth link is rotatably connected to the rear lifting wheel.

8. The novel lifting push-pull pulley device according to claim 7, characterized in that, The fourth link is provided with a second limiting post. When the rear lifting wheel is driven to roll from the lowest point to the highest point of the second inclined arc surface, the door leaf completes the descent action, and the second limiting post on the fourth link abuts against the third link to achieve the limiting action.

9. The novel lifting push-pull pulley device according to claim 6, characterized in that, The rear support includes two rear pulley fixing plates that are aligned and spaced apart from each other on the left and right. The rear pulleys and the rear lifting wheels are rotatably clamped between the two rear pulley fixing plates.

10. A door and window system, characterized in that, The device includes a door leaf, a lower slide rail disposed below the door leaf, and a novel lifting and pushing pulley device as described in any one of claims 1-9 disposed at the bottom of the door leaf.

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