Pulley device and door and window pulley system

Abstract

The invention relates to the technical field of door and window pulleys, in particular to a pulley device and a door and window pulley system.The pulley device comprises a mounting base, a pulley support is arranged on the mounting base, the pulley structure comprises a supporting shaft and a pulley, the pulley is arranged on the supporting shaft in a sleeving mode, and the supporting 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 peripheral end face 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 invention relates to the technical field of door and window pulleys, and 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 installation in 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. In the long-term use process, this thin bearing wall may affect the life of the bearing. In addition, if the use environment is relatively harsh, the bearing steel balls are prone to rust, which may cause the bearing to get stuck. Summary of the invention

[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 problem is: to provide a pulley device, a pulley bracket; a pulley structure, the pulley structure includes a support shaft and a pulley, the pulley sleeve is arranged on the support shaft, and the support shaft is arranged 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 present invention 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 protruding column inserted into the waist-shaped inclined hole; wherein, pulley structures are arranged 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 effects of the present invention are that, compared with the prior art, the present invention reduces the friction force of the pulley during rotation and improves the sliding efficiency by controlling the friction coefficient between the pulley and the support shaft to be smaller than the friction coefficient between the circumferential end face of the pulley and the contact surface of the door and window frame, thereby ensuring the stable rotation of the pulley on the support shaft and making 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 It is a partial enlarged structural schematic diagram of the door and window pulley device of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the support shaft of the door and window pulley device of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the pulley of the present invention;

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

[0023] Figure 5 It is a schematic cross-sectional structure diagram of a door and window pulley device provided on a door and window of the present invention;

[0024] Figure 6 It is a cross-sectional three-dimensional structural schematic diagram of a door and window pulley device provided on a door and window of the present invention;

[0025] Figure 7 It is a schematic diagram of the exploded structure of the door and window pulley device of the present invention;

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

[0027] Now, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0028] like Figures 1 to 8 As shown, the present invention 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 arranged 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 peripheral end surface 322 of the pulley 320 is μ2, and μ1 is less than μ2.

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

[0031] Specifically, the mounting seat 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, and is used to assist the door and window 10 in sliding, 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 seat 100 provides a stable support point to ensure that the pulley 320 device will not be displaced 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, and the door and window 10 is an openable or closable component used in a building 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 an intermediate component connecting the mounting base 100 and the pulley structure 300, and is usually made of a strong material to withstand the force generated by the pulley 320 during the sliding process, and adjust the distance between the pulley 320 of the pulley structure 300 and the door and window frame 20, or the pressing force when the pulley bracket 200 contacts. The pulley bracket 200 ensures that the pulley structure 300 can be stably installed on the door and window 10, and reduces the sliding or noise caused by deformation or damage of the bracket.

[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, thereby 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 an axis structure for the pulley 320 to rotate freely, reduces the friction between the pulley 320 and the support shaft 310, improves the sliding efficiency, and sets μ1 to be less than μ2 so that the pulley 320 can rotate smoothly. The pulley 320 is in direct contact with the upper frame of the door and window 10 and is made of wear-resistant material to improve 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. The smaller μ1 makes the friction force of the pulley 320 smaller when rotating on the support shaft 310. The friction coefficient μ2 represents the friction coefficient between the circumferential end surface of the pulley 320 and the contact surface of the upper frame of the door and window 10. The larger μ2 makes the contact between the pulley 320 and the upper frame more stable and the rotation smoother. By optimizing the materials and structures of the pulley 320 and the support shaft 310, the miniaturization of the pulley 320 is achieved, and the material usage and cost are reduced. The miniaturized design not only reduces the cost, but also facilitates use in narrow frames.

[0035] Among them, 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 to achieve 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 to reduce the contact area between the support shaft and the pulley 320 or reduce the roughness of the contact surface, thereby reducing the friction coefficient.

[0038] In this embodiment, the pulley 320 includes a central hole 321, the support shaft 310 is inserted into the central hole 321, and the peripheral end surface 311 of the support shaft 310 is slidably connected with the inner end surface of the hole of the pulley 320. The central hole 321 is matched with the peripheral end surface 311 of the support shaft 310, and the pulley 320 can be sleeved on the support shaft 310 through the central hole 321 and rotate, and the support shaft 310 can be more closely connected with 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 layer, and the friction coefficient of the coating layer is μ 2. The friction coefficient of the circumferential end surface 322 of the pulley 320 in contact with the door and window frame 20 is controlled by the coating layer to ensure that there is appropriate friction during the sliding process, thereby achieving a stable sliding effect.

[0041] Among them, the material of the coating layer should consider the friction coefficient and wear resistance, and can 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] Solution 2: A contact ring 324 is arranged around the circumferential end surface 322 of the pulley 320, and the friction coefficient of the outer surface of the contact ring 324 is μ2. The arrangement of the contact ring 324 reduces the spraying process, avoids the complexity and cost brought by the 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 material or metal material, and metal materials such as stainless steel or aluminum alloy have good corrosion resistance and wear resistance.

[0043] The circumferential end surface 322 of the pulley 320 is surrounded by a groove 323, the contact ring 324 is embedded in the groove 323, and the outer surface of the contact ring 324 protrudes from the groove 323, which effectively fixes the contact ring 324 and ensures that the connection between the contact ring 324 and the pulley 320 is tight and stable and not easy to fall off. The contact ring 324 can be effectively fixed by the groove 323 to prevent it from shifting or falling off during use. The outer surface of the contact ring 324 protrudes from the groove 323 to provide a larger contact area and improve 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, and 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 the 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 protruding column 210 inserted into the waist-shaped inclined hole 422; wherein, pulley structures 300 are arranged at both ends of the pulley bracket 200.

[0049] The length direction of the mounting seat 100 is defined as the front-to-back direction. The sliding seat 400 moves forward and backward between the pulley bracket 200 and the mounting seat 100 under the drive of the driving structure. During the movement, the waist-shaped avoidance hole 421 follows the forward and backward movement to avoid the rotating shaft 500. At the same time, during the movement, the waist-shaped inclined hole 422 also follows the forward and backward movement. Since the raised column 210 is penetrated into the waist-shaped inclined hole 422, the raised column 210 rotates horizontally with the forward and backward 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 abuts against 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 vertical plate 110 is provided with a second hole 111 and embedded in the annular groove. Of course, the nut section 510 can also add a limiting ring to form a groove structure similar to the annular groove, so as to cooperate with the second hole 111, so that the second vertical plate 110 and the screw 500 are relatively stationary during the forward and backward movement. The threaded section 520 is threadedly matched with the threaded hole 411 of the first vertical plate 410. By rotating the screw 500, the position of the first vertical plate 410 is adjusted, that is, the front and rear positions of the first vertical plate 410 and the second vertical plate 110 are adjusted, thereby adjusting the front and rear sliding position of the sliding seat 400.

[0053] The above 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 according to 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, the pulley structure comprising a support shaft and a pulley, the pulley sleeve is arranged 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 comprises a central hole, the support shaft is inserted into the central 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, characterized in that: 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, characterized in that: The support shaft includes a columnar structure, and a cross-sectional area of ​​the columnar structure is less 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 also includes a support boss, the columnar structure is arranged on the support boss, and the upper surface of the support boss supports the pulley after being inserted into the columnar structure.

8. A door and window pulley system, characterized in that: 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 arranged 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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