Pulley device and door and window pulley system

Abstract

The utility model relates to the technical field of door and window pulleys, in particular to a pulley device and a door and window pulley system, which comprise a mounting seat and a pulley support arranged on the mounting seat, the pulley structure comprises a support shaft and a pulley, the pulley is sleeved on the support shaft, and the support shaft is arranged on the pulley support; wherein the friction coefficient between the pulley and the supporting shaft is mu1, the friction coefficient of the peripheral side end face of the pulley is mu2, and mu1 is smaller than mu2. Compared with the prior art, by controlling the friction coefficient between the pulley and the supporting shaft to be smaller than the friction coefficient between the end face of the peripheral side of the pulley and the contact face of the door and window frame, the friction force of the pulley in the rotating process is reduced, the sliding efficiency is improved, and stable rotation of the pulley on the supporting shaft is ensured; the contact between the pulley and the door and window frame is more stable and smoother; furthermore, durability of the pulley is improved, noise and abrasion are reduced, cost is lower, manufacturing is easier, and cost is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of door and window pulleys, in particular to a pulley device and a door and window pulley system. Background Art

[0002] In the field of door and window pulleys, as the installation environment of door and window pulleys becomes narrower and narrower, that is, to achieve the installation of narrow door and window frames, if ordinary rollers are used, the material durability is higher, but it is still easy to get stuck and the rotation is not smooth.

[0003] If bearings are used as rollers, for pulley bearings, the use of steel balls will make the bearing wall very thin. Over long-term use, this thin bearing wall may affect the bearing life. In addition, if the operating environment is relatively harsh, the bearing steel balls are prone to rust, which may cause the bearing to seize due to rust. Utility Model Content

[0004] The technical problem to be solved by the present invention is to provide a pulley device and a door and window pulley system to solve the problems of short bearing life and easy bearing jamming in view of the above-mentioned defects of the prior art.

[0005] The technical solution adopted by the present invention to solve its technical problems is: to provide a pulley device, a pulley bracket; a pulley structure, the pulley structure includes a support shaft and a pulley, the pulley is sleeved on the support shaft, and the support shaft is set on the pulley bracket; wherein the friction coefficient between the pulley and the support shaft is μ1, the friction coefficient of the circumferential end face of the pulley is μ2, and μ1 is less than μ2.

[0006] Among them, a preferred solution is: the pulley includes a center hole, the support shaft is inserted into the center hole, and the peripheral end surface of the support shaft is slidably connected with the inner end surface of the hole of the pulley.

[0007] Among them, a preferred solution is: the circumferential end surface of the pulley is coated with a coating layer, and the friction coefficient of the coating layer is μ2.

[0008] Among them, a preferred solution is: a contact ring is arranged around the circumferential end surface of the pulley, and the friction coefficient of the outer surface of the contact ring is μ2.

[0009] Among them, a preferred solution is: a groove is arranged around the circumferential end surface of the pulley, the contact ring is embedded in the groove, and the outer surface of the contact ring protrudes from the groove.

[0010] Among them, a preferred solution is that: the support shaft includes a columnar structure, and the cross-sectional area of ​​the columnar structure is less than or equal to the hole area of ​​the central hole.

[0011] Among them, a preferred solution is: the support shaft also includes a supporting boss, the columnar structure is arranged on the supporting boss, and the upper surface of the supporting boss supports the pulley after being inserted into the columnar structure.

[0012] The technical solution adopted by the utility model to solve the technical problem is to provide a door and window pulley system.

[0013] Mounting seat;

[0014] The pulley device, the pulley bracket of the pulley device is arranged on the mounting seat.

[0015] Among them, the preferred solution is: the door and window pulley system also includes a sliding seat arranged between the pulley bracket and the mounting seat, and a driving structure that drives the sliding seat to move forward and backward relative to the mounting seat, the sliding seat includes a waist-shaped inclined hole and a waist-shaped avoidance hole, the pulley bracket is rotatably connected to the mounting seat through a rotating shaft, and the rotating shaft is arranged through the waist-shaped avoidance hole, and the pulley bracket includes a raised column inserted into the waist-shaped inclined hole; wherein, pulley structures are provided at both ends of the pulley bracket.

[0016] Among them, the preferred solution is: the driving structure includes a first vertical plate arranged on the sliding seat, and a second vertical plate arranged on the mounting seat, and the driving structure also includes a screw, the screw is positioned front and back on the second vertical plate, and the screw is threadedly connected to the first vertical plate.

[0017] The beneficial effect of the present invention is that, compared with the prior art, the present invention reduces the friction force of the pulley during rotation, improves the sliding efficiency, ensures the stable rotation of the pulley on the support shaft, and makes the contact between the pulley and the door and window frame more stable and smooth; further, the durability of the pulley is improved, noise and wear are reduced, and the cost is lower, and the manufacturing is easier and the cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0019] Figure 1 This is a partially enlarged structural diagram of the door and window pulley device of the utility model;

[0020] Figure 2 This is a schematic structural diagram of the support shaft of the door and window pulley device of the utility model;

[0021] Figure 3 It is a structural diagram of the pulley of the utility model;

[0022] Figure 4 This is a schematic structural diagram of a pulley with a contact ring according to the present invention;

[0023] Figure 5 This is a schematic cross-sectional view of the door and window pulley device of the utility model provided on the door and window;

[0024] Figure 6 This is a schematic cross-sectional perspective structural diagram of a door and window pulley device provided on a door and window according to the present invention;

[0025] Figure 7 This is a schematic diagram of the exploded structure of the door and window pulley device of the utility model;

[0026] Figure 8 It is a schematic diagram of the back structure of the pulley bracket of the utility model. DETAILED DESCRIPTION

[0027] Now, in conjunction with the accompanying drawings, the preferred embodiments of the present utility model will be described in detail.

[0028] like Figures 1 to 8 As shown, the utility model provides a preferred embodiment of a pulley device.

[0029] A pulley device includes a pulley bracket 200 and a pulley structure 300, wherein the pulley structure 300 includes a support shaft 310 and a pulley 320, wherein the pulley 320 is sleeved on the support shaft 310, and the support shaft 310 is set on the pulley bracket 200; wherein the friction coefficient between the pulley 320 and the support shaft 310 is μ1, and the friction coefficient of the circumferential end surface 322 of the pulley 320 is μ2, wherein μ1 is less than μ2.

[0030] Preferably, a door and window pulley device is further provided, comprising a mounting seat 100 , and a pulley bracket 200 is provided on the mounting seat 100 .

[0031] Specifically, the mounting base 100 is the fixed part of the pulley 320 device, fixed to the top of the door and window 10, and arranged between the top of the door and window 10 and the door and window frame 20. It is used to assist the sliding of the door and window 10, so that the door and window 10 will not swing, and the distance between the door and window 10 and the door and window frame 20 is relatively stable and will not collide. The mounting base 100 provides a stable support point, ensuring that the pulley 320 device will not move during the sliding process of the door and window 10, thereby ensuring the stability and safety of the door and window 10. Among them, the door and window 10 refers to a door or a window. The door and window 10 is an openable or closable component in a building used to separate indoor and outdoor spaces and provide ventilation and lighting. The door and window 10 of the present invention specifically refers to a structure that can be opened or closed by pulling.

[0032] The pulley bracket 200 is the intermediate component connecting the mounting base 100 and the pulley structure 300. It is typically made of a sturdy material to withstand the forces generated by the pulley 320 during sliding. It also adjusts the distance between the pulley 320 and the door / window frame 20, or the compressive force during contact. The pulley bracket 200 ensures a stable installation of the pulley structure 300 on the door / window 10, minimizing sliding problems or noise caused by bracket deformation or damage.

[0033] The pulley structure 300 enables the door and window 10 to slide smoothly on both sides of the upper door and window frame 20, reducing friction and wear, extending the service life of the door and window 10, and preventing the door and window 10 from swinging.

[0034] The support shaft 310 provides a shaft structure for the pulley 320 to rotate freely, reducing friction between the pulley 320 and the support shaft 310 and improving sliding efficiency. Setting μ1 to be smaller than μ2 allows the pulley 320 to rotate smoothly. The pulley 320 is in direct contact with the upper frame of the door or window 10 and is made of wear-resistant material to enhance durability, reduce noise and wear, and improve the user experience. The friction coefficient μ1 represents the friction coefficient between the pulley 320 and the support shaft 310. A smaller μ1 results in less friction when the pulley 320 rotates on the support shaft 310. The friction coefficient μ2 represents the friction coefficient between the circumferential end surface of the pulley 320 and the upper frame of the door or window 10. A larger μ2 ensures more stable contact between the pulley 320 and the upper frame, resulting in smoother rotation. By optimizing the materials and structure of the pulley 320 and the support shaft 310, the pulley 320 is miniaturized, reducing material usage and costs. This miniaturized design not only reduces costs but also facilitates use in narrow frame applications.

[0035] The support shaft 310 is preferably a steel shaft.

[0036] The peripheral end surface 322 of the pulley 320 refers to the peripheral outer surface.

[0037] Among them, the solutions for achieving μ1 less than μ2 may include: 1. Material selection, selecting a material with a smaller friction coefficient between the pulley 320 and the support shaft 310, such as using a material with a low friction coefficient or performing a special coating treatment to reduce the friction between the pulley 320 and the support shaft 310; 2. Surface treatment, performing special treatment on the surfaces of the support shaft 310 and the pulley 320, such as a smooth coating or lubricant, to reduce the friction coefficient; 3. Structural design, reducing the contact area between the support shaft and the pulley 320 or reducing the roughness of the contact surface, thereby reducing the friction coefficient.

[0038] In this embodiment, the pulley 320 includes a central hole 321, through which the support shaft 310 is inserted. The peripheral end surface 311 of the support shaft 310 is slidably connected to the inner end surface of the hole of the pulley 320. The central hole 321 cooperates with the peripheral end surface 311 of the support shaft 310. The pulley 320 can be mounted on the support shaft 310 through the central hole 321 and rotated. The support shaft 310 can be more tightly connected to the pulley structure 300, ensuring that the pulley 320 rotates more stably and smoothly on the support shaft 310.

[0039] In this embodiment, two solutions are provided for the circumferential end surface 322 of the pulley 320:

[0040] Solution 1: The circumferential end surface 322 of the pulley 320 is coated with a coating having a friction coefficient of μ2. The coating controls the friction coefficient between the circumferential end surface 322 of the pulley 320 and the door / window frame 20, ensuring appropriate friction during sliding, thereby achieving a stable sliding effect.

[0041] Among them, the material of the coating layer should consider the friction coefficient and wear resistance, and may further consider corrosion resistance to ensure its effectiveness and durability in the sliding system of the door and window 10. The following coatings can be selected: polytetrafluoroethylene (PTFE) coating, polyethylene (PE) coating, polymethyl methacrylate (PMMA) coating, fluororubber coating, polyetheretherketone (PEEK) coating or polyimide (PI) coating.

[0042] Option 2: A contact ring 324 is disposed around the circumferential end surface 322 of the pulley 320. The outer surface of the contact ring 324 has a friction coefficient of μ2. The provision of the contact ring 324 reduces the complexity and cost of the spray coating process and makes it easier to control the material and friction coefficient of the contact ring 324. The contact ring 324 can be made of the following materials: nylon, polytetrafluoroethylene (PTFE), polyethylene (PE), polymethyl methacrylate (PMMA), rubber, or metal. Metal materials such as stainless steel or aluminum alloy have excellent corrosion and wear resistance.

[0043] The pulley 320 has a circumferential end surface 322 formed with a groove 323. The contact ring 324 is embedded in the groove 323. The outer surface of the contact ring 324 protrudes from the groove 323, effectively securing the contact ring 324 and ensuring a tight and secure connection between the contact ring 324 and the pulley 320. The groove 323 effectively secures the contact ring 324, preventing it from shifting or falling off during use. The protruding groove 323 on the outer surface of the contact ring 324 provides a larger contact area, improving the contact performance between the pulley 320 and the door and window frame 20.

[0044] like Figures 2 to 4 As shown, the present invention provides a preferred embodiment of the support shaft 310 .

[0045] The support shaft 310 further includes a support boss 312. The columnar structure is disposed on the support boss 312. The upper surface of the support boss 312 supports the pulley 320 after being inserted into the columnar structure. The provision of the support boss 312 prevents the pulley 320 from directly contacting the surface of the pulley bracket 200, thereby reducing the rotational friction of the pulley 320.

[0046] Furthermore, the pulley 320 is prevented from directly contacting the surface of the bracket, thereby reducing wear of the pulley 320 and extending the service life of the pulley 320 .

[0047] like Figure 7 and Figure 8 As shown, the present invention provides a preferred embodiment of a sliding seat 400 .

[0048] The door and window pulley device also includes a sliding seat 400 arranged between the pulley bracket 200 and the mounting seat 100, and a driving structure that drives the sliding seat 400 to move forward and backward relative to the mounting seat 100. The sliding seat 400 includes a waist-shaped inclined hole 422 and a waist-shaped avoidance hole 421. The pulley bracket 200 is rotatably connected to the mounting seat 100 through a rotating shaft 500, and the rotating shaft 500 is arranged through the through hole 220 and the waist-shaped avoidance hole 421 of the pulley bracket 200. The pulley bracket 200 includes a raised column 210 inserted into the waist-shaped inclined hole 422; wherein, pulley structures 300 are provided at both ends of the pulley bracket 200.

[0049] The length direction of the mounting base 100 is defined as the front-to-back direction. The sliding base 400 moves back and forth between the pulley bracket 200 and the mounting base 100 under the drive of the driving structure. During the movement, the waist-shaped avoidance hole 421 follows the front-to-back movement to avoid the rotating shaft 500; at the same time, during the movement, the waist-shaped inclined hole 422 also follows the front-to-back movement. Since the raised column 210 is passed through the waist-shaped inclined hole 422, the raised column 210 rotates horizontally with the front-to-back movement of the waist-shaped inclined hole 422, thereby driving the pulley bracket 200 to rotate around the rotating shaft 500, so that the pulley 320 of the pulley structure 300 approaches and rests on the door and window frame 20 to adapt to door and window frames 20 of different widths.

[0050] like Figure 7 and Figure 8 As shown, the present invention provides a preferred embodiment of the driving structure.

[0051] The driving structure includes a first upright plate 410 arranged on the sliding seat 400 and a second upright plate 110 arranged on the mounting seat 100. The driving structure also includes a screw 500, which is positioned front and back on the second upright plate 110 and is threadedly connected to the first upright plate 410.

[0052] The screw 500 includes a threaded section 520 and a nut section 510. The nut section 510 is provided with an annular groove. The second upright plate 110 is provided with a second hole 111 and is embedded in the annular groove. Of course, the nut section 510 can also be added with a retaining ring to form a groove structure similar to the annular groove, thereby cooperating with the second hole 111 to keep the second upright plate 110 and the screw 500 relatively stationary during the forward and backward movement. The threaded section 520 is threadedly engaged with the threaded hole 411 of the first upright plate 410. By turning the screw 500, the position of the first upright plate 410 is adjusted, that is, the forward and backward position of the first upright plate 410 and the second upright plate 110 is adjusted, thereby adjusting the forward and backward sliding position of the sliding seat 400.

[0053] The above description is only the best embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes or modifications made within the scope of the patent application of the present invention are covered by the present invention.

Claims

1. A pulley device, characterized in that: Pulley bracket; A pulley structure, comprising a support shaft and a pulley, wherein the pulley is sleeved on the support shaft, and the support shaft is arranged on a pulley bracket; The friction coefficient between the pulley and the support shaft is μ1, the friction coefficient of the peripheral end surface of the pulley is μ2, and μ1 is smaller than μ2.

2. The pulley device according to claim 1, characterized in that: The pulley includes a center hole, the support shaft is inserted into the center hole, and the peripheral end surface of the support shaft is slidably connected with the inner end surface of the hole of the pulley.

3. The pulley device according to claim 1, characterized in that: The circumferential end surface of the pulley is coated with a coating layer, and the friction coefficient of the coating layer is μ2.

4. The pulley device according to claim 1, wherein: A contact ring is arranged around the circumferential end surface of the pulley, and the friction coefficient of the outer surface of the contact ring is μ2.

5. The pulley device according to claim 4, characterized in that: A groove is arranged around the circumferential end surface of the pulley, the contact ring is embedded in the groove, and the outer surface of the contact ring protrudes from the groove.

6. The pulley device according to claim 1, wherein: The support shaft includes a columnar structure, and a cross-sectional area of ​​the columnar structure is smaller than or equal to a hole area of ​​the central hole.

7. The pulley device according to claim 6, characterized in that: The support shaft further includes a supporting boss, the columnar structure is arranged on the supporting boss, and the upper surface of the supporting boss supports the pulley which is sleeved into the columnar structure.

8. A door and window pulley system, characterized by: Mounting seat; The pulley device according to any one of claims 1 to 7, wherein the pulley bracket of the pulley device is arranged on a mounting seat.

9. The door and window pulley system according to claim 8, characterized in that: The door and window pulley system also includes a sliding seat arranged between the pulley bracket and the mounting seat, and a driving structure that drives the sliding seat to move forward and backward relative to the mounting seat. The sliding seat includes a waist-shaped inclined hole and a waist-shaped avoidance hole. The pulley bracket is rotatably connected to the mounting seat through a rotating shaft, and the rotating shaft is arranged through the waist-shaped avoidance hole. The pulley bracket includes a raised column inserted into the waist-shaped inclined hole; wherein, pulley structures are provided at both ends of the pulley bracket.

10. The door and window pulley system according to claim 9, characterized in that: The driving structure includes a first vertical plate arranged on the sliding seat and a second vertical plate arranged on the mounting seat. The driving structure also includes a screw, which is positioned front and back on the second vertical plate and is threadedly connected to the first vertical plate.

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