Adjustable pulley device and door and window

Abstract

The invention relates to the technical field of door and window accessories, in particular to an adjustable pulley device and a door and window. The adjustable pulley device comprises a long-strip-shaped frame, at least one pulley module is arranged in the frame in the length direction, limiting blocks are arranged at the two ends of the frame, each pulley module comprises a supporting frame in sliding connection with the frame, and guide slopes are arranged on the two opposite sides of the supporting frame in the length direction of the frame correspondingly; when the number of the pulley modules is two or more, a third guide piece is arranged between every two adjacent pulley modules, and the third guide pieces make linear contact with the guide slopes on the two sides and make linear contact with the bottom of the frame. By the adoption of the mode, the height of the pulley module can be adjusted after the door and window are installed in the frame body, so that the matching degree of the pulley module and a sliding rail at the frame body is improved, and the using smoothness and safety are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of door and window accessories, in particular to an adjustable pulley device and a door and window. Background Art

[0002] Sliding doors and windows are widely used in homes due to their flexible opening and small space requirements. A pulley device, for example, is fixed to the bottom of the wing of the sliding door or window and cooperates with a lower guide rail in the door or window frame to ensure the sliding door or window is opened and closed.

[0003] As the operating and load-bearing components of sliding doors and windows, the pulley assembly determines their stability and safety. During installation, to facilitate loading, a certain amount of clearance is typically left between the door and window and the frame. If this is too loose during use, it can easily cause uneven force on the pulley assembly, leading to poor operation and even derailment, increasing safety risks.

[0004] In response to the above problems, the pulley device is currently set to an adjustable form to achieve better adaptation between the door and window, that is, to achieve a relative sliding setting. However, when adjusting the sliding of the pulley device, the pulley device is usually adjusted to slide in the form of surface contact, which makes the friction force high during the adjustment and sliding, and when dust enters, it is easy to get stuck, causing the adjustment and sliding to fail, resulting in poor stability. Summary of the Invention

[0005] The technical problem to be solved by the embodiments of the present invention is to provide an adjustable pulley device that can adjust the height of the pulley module after the doors and windows are installed in the frame, so as to improve the fit with the slide rails at the frame and improve the smoothness and stability of the adjustment during use.

[0006] The present invention discloses an adjustable pulley device, comprising: a frame arranged in an elongated strip shape, at least one pulley module arranged in the frame along the length direction, and limit blocks arranged at both ends of the frame;

[0007] The pulley module includes a support frame slidably connected to the frame, and the support frame is provided with guide inclined surfaces on opposite sides along the length direction of the frame;

[0008] When there is one pulley module, a second guide member is provided between each of the two limit blocks and the pulley module, and the second guide member is in line contact with the corresponding guide inclined surface respectively;

[0009] When there are two or more pulley modules, a third guide member is further provided between adjacent pulley modules, and the third guide member is in line contact with the guide slopes on both sides and in line contact with the bottom of the frame;

[0010] The pulley module can protrude or retract a portion of the frame.

[0011] Optionally, a second guide slot corresponding to the pulley module is provided on the limiting block, and the second guide member is supported between the second guide slot and the guide inclined surface.

[0012] Optionally, the third guide member and the second guide member are circular cylinders, and the arc surfaces of the circular cylinders respectively abut against the guide slope and the bottom of the frame.

[0013] Optionally, the pulley module further includes a roller or a bearing rotatably connected to the support frame, the support frame includes support plates arranged in parallel, the roller or the bearing is located between the two support plates, and part of the roller or the bearing is exposed from the frame.

[0014] Optionally, the pulley module further includes a buffer pad arranged between the support plates, the buffer pad is located on opposite sides of the roller or the bearing in the radial direction, and an arc groove is provided on the buffer pad, and the arc groove is used to cooperate with the track of the frame.

[0015] Optionally, an inwardly bent edge is provided on one side of the frame opening, and the edge can be clamped with the support plate.

[0016] Optionally, the frame is formed by bending in one piece.

[0017] The present invention discloses an adjustable pulley device, comprising: a frame arranged in an elongated strip shape, at least one pulley module arranged in the frame along the length direction, a slider and a limit block respectively arranged at both ends of the frame, and the slider can slide relative to the frame, and an adjustment member is arranged at one end of the frame, and the adjustment member is connected to the slider;

[0018] The pulley module includes a support frame slidably connected to the frame, and the support frame is provided with guide inclined surfaces on opposite sides along the length direction of the frame;

[0019] When there is only one pulley module, a first guide is provided between the slider and the pulley module, and a second guide is provided between the limit block and the pulley module, and the first guide and the second guide are respectively in line contact with the corresponding guide inclined surface;

[0020] When there are two or more pulley modules, a third guide member is further provided between adjacent pulley modules, and the third guide member is in line contact with the guide slopes on both sides and in line contact with the bottom of the frame;

[0021] When the adjusting member drives the slider to slide relative to the frame, the pulley module can protrude or retract a portion of the frame.

[0022] Optionally, the slider includes a first guide groove corresponding to the pulley module, and a first guide member is provided between the slider and the adjacent pulley module, and the first guide member is supported between the first guide groove and the guide inclined surface.

[0023] Optionally, the slider includes a threaded hole corresponding to the adjusting member, and the adjusting member is connected to the slider through the threaded hole.

[0024] Optionally, the adjusting member includes a force-applying portion, a connecting portion and a threaded portion connected in sequence, the diameter of the connecting portion is smaller than the diameter of the threaded portion, and a limiting plate is also provided in the frame, the limiting plate is clamped on the connecting portion, and is used to limit the adjusting member.

[0025] The present invention discloses an adjustable pulley device, comprising: a frame arranged in an elongated strip shape, at least one pulley module arranged in the frame along the length direction, a slider and a limit block respectively arranged at both ends of the frame, and the slider can slide relative to the frame;

[0026] The pulley module includes a support frame slidably connected to the frame, and the support frame is provided with guide inclined surfaces on opposite sides along the length direction of the frame;

[0027] When there is only one pulley module, a first guide is provided between the slider and the pulley module, and a second guide is provided between the limit block and the pulley module, and the first guide and the second guide are respectively in line contact with the corresponding guide inclined surface;

[0028] When there are two or more pulley modules, a third guide member is further provided between adjacent pulley modules, and the third guide member is in line contact with the guide slopes on both sides and in line contact with the bottom of the frame;

[0029] The pulley module can protrude or retract a portion of the frame.

[0030] Optionally, an adjusting member is provided at one end of the frame, and the adjusting member is connected to the slider; when the adjusting member drives the slider to slide relative to the frame, the pulley module can protrude or retract a partial distance from the frame.

[0031] The present invention discloses an adjustable pulley device, comprising: a door or window, characterized in that it comprises a frame with a track, a wing sash of the door or window, and the above-mentioned adjustable pulley device, wherein the wing sash is connected to the track of the frame through the adjustable pulley device.

[0032] Compared with the prior art, the advantageous effect of the adjustable pulley device provided by the embodiment of the present invention is that: by providing at least one pulley module along the length direction within the frame, when the pulley module is set to one, the pulley module is adjusted and slidable by the cooperation of the first guide and the second guide. When the pulley modules are set to two or more, a third guide is provided between adjacent pulley modules. When the slider slides relative to the frame, the slider squeezes the pulley modules and compresses the distance between the pulley modules. At this time, the third guide moves relative to the guide slope, achieving the reduction of the distance between the pulley modules while also protruding a certain distance from the frame. After the doors and windows are installed, this helps to ensure the stability of the doors and windows when they are pushed and pulled. In addition, when the pulley modules protrude or retract a certain distance from the frame, the third guide is in line contact with the guide slopes on both sides and with the bottom of the frame. The above method is conducive to ensuring stable support through the form of three-point support, and the line contact helps to reduce the friction when the pulley modules are in motion, thereby reducing the difficulty of adjusting the sliding. By adopting the above solution, when in use, after the adjustable pulley device is connected to the door and window, the degree of fit with the slide rail at the frame is improved, and the smoothness and stability of adjustment during use are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0034] Figure 1 is a structural schematic diagram of an adjustable pulley device provided by an embodiment of the present invention;

[0035] Figure 2 is a cross-sectional schematic diagram of an adjustable pulley device provided by an embodiment of the present invention;

[0036] Figure 3 1 is a schematic structural diagram of a pulley module provided by an embodiment of the present invention;

[0037] Figure 4 is an exploded schematic diagram of a frame and a slider provided in an embodiment of the present invention;

[0038] Figure 5 This is a schematic structural diagram of the cooperation between the limit block and the second guide member provided in an embodiment of the present invention;

[0039] Figure 6 2 is a schematic structural diagram of the third guide member provided by an embodiment of the present invention, which cooperates with the frame and the pulley module respectively;

[0040] Figure 7 1 is a cross-sectional schematic diagram of an adjustable pulley device provided with two limit blocks according to an embodiment of the present invention;

[0041] Figure 8is a cross-sectional schematic diagram of an adjustable pulley device without an adjusting member provided in an embodiment of the present invention;

[0042] Figure 9 1 is a schematic structural diagram of an adjustable pulley device provided by an embodiment of the present invention, with a first slider and a second slider respectively provided at both ends;

[0043] Figure 10 It is a cross-sectional schematic diagram of an adjustable pulley device provided by an embodiment of the present invention, with a first adjusting member and a second adjusting member respectively provided at both ends.

[0044] The reference numerals in the figures are:

[0045] 100. Adjustable pulley device; 110. Frame; 112. Folding edge; 120. Pulley module; 122. Guide slope; 124. Support plate; 126. Roller; 128. Buffer pad; 1282. Arc groove; 130. Adjusting member; 132. Force-applying portion; 134. Connecting portion; 136. Threaded portion; 140. Slider; 142. First guide slot; 144. Limiting slot; 150. Third guide member; 160. First guide member; 170. Limiting block; 172. Second guide slot; 180. Second guide member; 190. Limiting plate; 211. First slider; 212. Second slider; 221. First adjusting member; 222. Second adjusting member. DETAILED DESCRIPTION

[0046] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. Now, in conjunction with the accompanying drawings, the preferred embodiments of the present invention will be described in detail.

[0047] like Figure 1 、 Figure 2 and Figure 3 、 Figure 7 and Figure 8 As shown, an embodiment of the present invention provides an adjustable pulley device 100, comprising: a frame 110 arranged in a long strip shape, at least one pulley module 120 is arranged in the frame 110 along the length direction, and limit blocks 170 are provided at both ends of the frame 110; the pulley module 120 includes a support frame slidably connected to the frame 110, and the support frame is respectively provided with guide inclined surfaces 122 on opposite sides along the length direction of the frame 110; when there is one pulley module 120, a second guide member 180 is provided between the two limit blocks 170 and the pulley module 120, and the second guide members 180 are respectively in line contact with the corresponding guide inclined surfaces 122; when there are two or more pulley modules 120, a third guide member 150 is provided between adjacent pulley modules 120, and the third guide member 150 is respectively in line contact with the guide inclined surfaces 122 on both sides and in line contact with the bottom of the frame 110; the pulley module 120 can protrude or retract a part of the distance of the frame 110.

[0048] When there are two or more pulley modules 120, a third guide member 150 is provided in addition to the two second guide members 180. During use, all pulley modules 120 are forced to retract after contacting the external frame. Due to the mutual compression of the second guide members 180 and the third guide members 150, each pulley module 120 is in a linked retraction and is on the same horizontal line, so that each pulley module 120 can contact the external frame and be evenly stressed, achieving balanced stress and preventing a single pulley module 120 from being subjected to a large force, which may damage the pulley module 120 or even the entire pulley module 120.

[0049] Furthermore, if Figure 1 、 Figure 2 and Figure 3 、 Figure 7 and Figure 8 As shown, an embodiment of the present invention provides an adjustable pulley device 100, comprising: a slider 140 and a limit block 170 are respectively provided at both ends of a frame 110, and the slider 140 can slide relative to the frame 110; a pulley module 120 includes a support frame slidably connected to the frame 110, and the support frame is respectively provided with guide inclined surfaces 122 on opposite sides along the length direction of the frame 110; when the pulley module 120 is set to one, a first guide member 160 is provided between the slider 140 and the pulley module 120 A second guide member 180 is provided between the limit block 170 and the pulley module 120, and the first guide member 160 and the second guide member 180 are respectively in line contact with the corresponding guide inclined surfaces 122; when there are two or more pulley modules 120, a third guide member 150 is provided between adjacent pulley modules 120, and the third guide member 150 is respectively in line contact with the guide inclined surfaces 122 on both sides and in line contact with the bottom of the frame 110; the pulley module 120 can protrude or retract a certain distance from the frame 110. Compared with the above solution, this embodiment of the solution replaces one limit block 170 with a slider 140, which can actively or passively adjust the maximum horizontal movement distance of all pulley modules 120, thereby meeting the final protrusion height of the pulley module 120 from the frame 110.

[0050] Specifically, by configuring the frame 110 in an elongated shape, more pulley modules 120 can be installed within the frame 110, which helps ensure the reliability of the door and window fit. In actual applications, the length of the frame 110 can be flexibly adjusted according to the size of the door and window. In an optional embodiment of the present application, the number of pulley modules 120 can be set from one to six, which helps improve the convenience of installation and adjustment.

[0051] Preferably, reference Figure 1 and Figure 2An adjustment member 130 is provided at one end of the frame 110 to achieve active adjustment of the slider 140. The adjustment member 130 is connected to the slider 140 and drives the slider 140 to slide relative to the frame 110. When the adjustment member 130 is not provided, the slider 140 and the pulley module 120 automatically slide and adjust under the action of gravity or external force. The purpose is to achieve a more balanced force on each pulley module 120 when each pulley module 120 is in direct contact with the outside. When the adjustment member 130 is provided, by adjusting the position of the slider 140, on the one hand, the position of the pulley module 120, that is, the vertical position, that is, the distance of protruding or retracting from the frame 110 is adjusted. On the other hand, the position of the slider 140 can also be adjusted to adjust the pulley module 120 to the extreme position of the frame 110. In fact, it can be regarded as that after the position of the slider 140 is adjusted by the adjustment member 130, it is no longer adjusted, so that the slider 140 is regarded as a state without the adjustment member 130. Of course, if the slider 140 is passively adjusted, the friction of the slider 140 is adjusted to provide resistance to the sliding of the pulley modules 120, so that the pulley modules 120 slowly form a flush state, avoiding the pulley modules 120 being adjusted too quickly and causing unevenness.

[0052] When there is only one pulley module 120, the position of the pulley module 120 can be limited only by the interaction of the slider 140 and the limit block 170. To ensure smooth movement of the pulley module 120 from or to the frame 110, a first guide 160 is provided between the slider 140 and the pulley module 120, and a second guide 180 is provided between the limit block 170 and the pulley module 120. When there are two or more pulley modules 120, a third guide 150 is also required between adjacent pulley modules 120 to ensure smooth transmission of the adjustment force from the current pulley module 120 to the adjacent pulley module 120. In addition, by making the first guide member 160 and the second guide member 180 respectively in line contact with the corresponding guide slopes 122, and the third guide member 150 respectively in line contact with the guide slopes 122 on both sides and in line contact with the bottom of the frame 110, it is beneficial to reduce the friction between them and provide stable support for the pulley module 120.

[0053] The adjustable pulley device 100 provided in the embodiment of the present application comprises at least one pulley module 120 disposed along the length of a frame 110. When there is one pulley module 120, the pulley module 120 is adjusted by the cooperation of a first guide member 160 and a second guide member 180. When there are two or more pulley modules 120, a third guide member 150 is disposed between adjacent pulley modules 120. When an adjusting member 130 disposed at one end of the frame 110 adjusts the sliding of a slider 140 relative to the frame 110, the sliding of the slider 140 squeezes the pulley modules 120, compressing the spacing between the pulley modules 120. At this time, the third guide member 150 moves relative to the guide slope 122, thereby reducing the spacing between the pulley modules 120 while also protruding a certain distance from the frame 110. After the door or window is installed, the pulley module 120 can be adjusted to fit more closely with the frame, thereby ensuring stability when the door or window is pushed or pulled. In addition, when the pulley module 120 protrudes or retracts a certain distance from the frame 110, and the third guide member 150 makes line contact with the guide slopes 122 on both sides and with the bottom of the frame 110, this method, through the form of three-point support, helps to ensure stable support, and the line contact helps to reduce the friction when the pulley module 120 is in motion, thereby reducing the difficulty of adjustment. Using this solution, when in use, after the adjustable pulley device 100 is connected to the door or window, the height of the pulley module 120 can be adjusted through the adjustment member 130 after the door or window is installed in the frame, thereby improving the fit with the slide rail on the frame and enhancing the smoothness and safety of adjustment during use.

[0054] In addition, compared with the conventional form of guide bevels, it can also avoid the problems of inconvenient installation and uneven force that easily cause jamming. Moreover, through the mutual cooperation of the first guide member 160, the second guide member 180 and the third guide member 150, the overall installation is more convenient and quick, and the transmission is smoother.

[0055] In this embodiment, reference Figure 9 and Figure 10, also provides a preferred solution of an adjustable pulley device 100, wherein a first slider 211 and a second slider 212 are respectively provided at both ends of the frame 110, and the first slider 211 can slide relative to the frame 110; the pulley module 120 includes a support frame slidably connected to the frame 110, and the support frame is respectively provided with guide inclined surfaces 122 on opposite sides along the length direction of the frame 110; when the pulley module 120 is set to one, a first guide member 160 is provided between the first slider 211 and the pulley module 120 A second guide member 180 is provided between the second slider 212 and the pulley module 120, and the first guide member 160 and the second guide member 180 are respectively in line contact with the corresponding guide inclined surfaces 122; when there are two or more pulley modules 120, a third guide member 150 is provided between adjacent pulley modules 120, and the third guide member 150 is respectively in line contact with the guide inclined surfaces 122 on both sides and in line contact with the bottom of the frame 110; the pulley module 120 can protrude or retract a certain distance from the frame 110.

[0056] Among them, compared with the above-mentioned scheme, this scheme is mainly provided with two slider structures, namely the first slider 211 and the second slider 212. The second slider 212 replaces the limit block 170, so that both ends of the frame 110 of the adjustable pulley device 100 are provided with slider structures. This dual slider structure is mainly used to improve the balance of left and right adjustment, so that the horizontal movement distance of each pulley module 120 is close, and the friction loss between each pulley module 120 and the frame 110 is reduced.

[0057] Furthermore, each slider structure may also be provided with a corresponding adjustment structure, that is, a first adjustment member 221 is provided at one end of the frame 110, and the first adjustment member 221 is connected to the first slider 211; when the first adjustment member 221 drives the first slider 211 to slide relative to the frame 110, the pulley module 120 can protrude or retract a portion of the frame 110; and a second adjustment member 222 is provided at one end of the frame 110, and the second adjustment member 222 is connected to the second slider 212; when the second adjustment member 222 drives the second slider 212 to slide relative to the frame 110, the pulley module 120 can protrude or retract a portion of the frame 110. It is mainly possible to provide the first adjustment member 221 or the second adjustment member 222 separately, or to provide the first adjustment member 221 and the second adjustment member 222 separately. The structures of the first adjustment member 221 and the second adjustment member 222 are consistent with those of the above-mentioned adjustment members, and are not described one by one here.

[0058] like Figure 2 and Figure 4As shown, the slider 140 includes a first guide slot 142 corresponding to the pulley module 120 , and a first guide member 160 is provided between the slider 140 and the adjacent pulley module 120 . The first guide member 160 is supported between the first guide slot 142 and the guide slope 122 .

[0059] Specifically, when the slider 140 slides along the frame 110 toward the position of the pulley module 120, a force is applied to the first guide member 160 through the first guide groove 142. The first guide member 160 then transmits the force to the guide slope 122. The distance between the first guide groove 142 and the guide slope 122 is compressed, and the force transmitted to the guide slope 122 is decomposed into a force component parallel to the extension direction of the frame 110 and a force component perpendicular to the extension direction of the frame 110. Under the action of these force components, the pulley module 120 is able to protrude a certain distance from the frame 110.

[0060] Slider 140 includes a threaded hole corresponding to adjustment member 130, and adjustment member 130 is connected to slider 140 via the threaded hole. As adjustment member 130 rotates relative to slider 140, its relative position with slider 140 changes. As adjustment member 130 moves deeper into slider 140 or as adjustment member 130 is unscrewed from slider 140, it drives slider 140 to slide relative to frame 110, thereby adjusting pulley module 120. For example, as adjustment member 130 is unscrewed from the threaded hole, the distance between slider 140 and the end of frame 110 increases, pushing slider 140 to slide toward one side of pulley module 120.

[0061] In addition, a limiting groove 144 is provided on the slider 140. The limiting groove 144 is set to be long and parallel to the length direction of the frame 110. A pin corresponding to the limiting groove 144 can be provided on the frame 110 to pass through the limiting groove 144. It can guide the sliding of the slider 140 and also play a limiting role to prevent the slider 140 from accidentally detaching from the frame 110 or tilting relative to the frame 110, so as to ensure reliability during transmission.

[0062] like Figure 2 and Figure 5 As shown, a second guide slot 172 corresponding to the pulley module 120 is provided on the limit block 170 , and a second guide member 180 is provided between the limit block 170 and the adjacent pulley module 120 . The second guide member 180 is supported between the second guide slot 172 and the guide slope 122 .

[0063] Specifically, by providing the second guide member 180 between the stop block 170 and the adjacent pulley module 120, when the second guide member 180 abuts between the second guide slot 172 and the guide slope 122, a force can be applied to the second guide member 180 via the second guide slot 172, and the second guide member 180 then transmits the force to the corresponding guide slope 122. In this way, the guide slope 122 on the side of the pulley module 120 near the stop block 170 abuts against the second guide member 180, ensuring smooth movement of the pulley module 120 when subjected to a force in the longitudinal direction of the frame 110, preventing the pulley module 120 from tilting or getting stuck during movement, and thus ensuring reliability during use.

[0064] In an optional embodiment of the present application, the third guide member 150 , the first guide member 160 and the second guide member 180 are circular cylinders, and the arc surfaces of the circular cylinders respectively abut against the guide slope 122 and the bottom of the frame 110 .

[0065] Specifically, the first guide member 160, the second guide member 180 and the third guide member 150 are cylindrical, which is conducive to simplifying the setting form, reducing the failure rate, and ensuring the smoothness of the linkage between the pulley modules 120 while providing stable support. Figure 6 As shown, the third guide member 150 forms line contact at points A, B, and C, reducing friction while providing stable support, thereby ensuring reliability during use. It is understood that the first guide member 160 can be integrally formed with the slider 140, and the second guide member 180 can be integrally formed with the limit block 170, without affecting the transmission of force, while achieving the same effect.

[0066] like Figure 3 As shown, the pulley module 120 further includes a roller 126 or a bearing rotatably connected to the support frame. The support frame includes support plates 124 arranged in parallel. The roller 126 or the bearing is located between the two support plates 124 , and a portion of the roller 126 or the bearing is exposed from the frame 110 .

[0067] Specifically, the pulley module 120 can be rotatably connected to the support frame using a roller 126, or can be rotatably connected to the support frame using a bearing. When the bearing is rotatably connected to the support frame, the mute effect is better. In addition, in order to ensure the fit of the roller 126 or the bearing when mating with the track on the frame, a groove can be provided on the outer ring surface of the roller 126 or the bearing to prevent the pulley module 120 from accidentally sliding off the track. In addition, the roller 126 or the bearing is located between the two support plates 124, which is conducive to ensuring the stable support of the support plate 124 to the roller 126 or the bearing to provide the required support strength. At the same time, part of the roller 126 or the bearing is exposed from the frame 110 to prevent the frame 110 from accidentally scratching the slide rail, which is conducive to ensuring stability during mating.

[0068] Please continue to refer to Figure 3 The pulley module 120 further includes a buffer pad 128 disposed between the support plates 124. The buffer pad 128 is located on opposite sides of the roller 126 or the bearing in the radial direction, and an arc groove 1282 is provided on the buffer pad 128. The arc groove 1282 is used to cooperate with the track of the frame.

[0069] Specifically, the buffer pads 128 are located on opposite sides of the roller 126 or bearing in the radial direction. When the adjustable pulley assembly 100 is mated with the track, the buffer pads 128 can fit tightly against the track through the arcuate grooves 1282, providing a buffering and cleaning effect on the track, preventing foreign matter on the track from being caught between the track and the pulley module 120, thereby ensuring smooth and stable adjustment of the adjustable pulley assembly 100. Furthermore, the buffer pads 128 are provided with T-slots, which divide the buffer pads 128 into two spaced-apart ear plates with arcuate grooves 1282. A transverse groove is formed above the arcuate grooves 1282, ensuring that the buffer pads 128 have a certain amount of deformation space when the pulley module 120 is mated with the track, thereby ensuring reliable mating and reducing wear on the buffer pads 128.

[0070] like Figure 4 As shown, an inwardly bent edge 112 is provided on one side of the opening of the frame 110 , and the edge 112 can be clamped with the support plate 124 .

[0071] Specifically, the roller 126 or bearing of the pulley module 120 extends from the above-mentioned opening, and the support plate 124 is limited by the inwardly bent edge 112 of the frame 110 to prevent the pulley module 120 from accidentally detaching from the frame 110.

[0072] In an optional embodiment of the present application, the frame 110 is integrally bent and formed. This form is conducive to ensuring the consistency of the frame 110, making the frame 110 more integrated and stronger, and helping to reduce production difficulty and production costs.

[0073] like Figure 2 and Figure 4 As shown, the adjusting member 130 includes a force-applying portion 132, a connecting portion 134 and a threaded portion 136 connected in sequence. The diameter of the connecting portion 134 is smaller than the diameter of the threaded portion 136. A limiting plate 190 is also provided in the frame 110. The limiting plate 190 is clamped on the connecting portion 134 to limit the adjusting member 130.

[0074] Specifically, the force-applying portion 132 of the adjusting member 130 can be a nut of a bolt, which facilitates the use of commonly used tools to adjust the adjusting member 130. The diameter of the connecting portion 134 is smaller than the diameter of the threaded portion 136, which facilitates limiting the threaded portion 136 by the limiting piece 190 when the threaded portion 136 is matched with the threaded hole of the slider 140, thereby preventing the threaded portion 136 from extending outside the frame 110. During assembly, it is only necessary to pass the adjusting member 130 through the frame 110 to connect it to the slider 140, and directly insert the limiting piece 190 into the connecting portion 134. Among them, the limiting piece 190 can adopt a U-shaped structure to facilitate matching with the connecting portion 134.

[0075] The present invention also discloses a door or window comprising a frame with a track, a door or window sash, and the adjustable pulley device 100 of the aforementioned embodiment. The sash is connected to the frame track via the adjustable pulley device 100. This door or window exhibits the same structure and benefits as the adjustable pulley device 100 of the aforementioned embodiment. The structure and benefits of the adjustable pulley device 100 have been described in detail in the aforementioned embodiment and will not be repeated here.

[0076] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Those skilled in the art may modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present invention.

Claims

1. An adjustable pulley device, characterized in that: include: A frame arranged in an elongated strip shape, wherein at least one pulley module is arranged along the length direction of the frame, and limit blocks are provided at both ends of the frame; The pulley module includes a support frame slidably connected to the frame, and the support frame is provided with guide inclined surfaces on opposite sides along the length direction of the frame; When there is one pulley module, a second guide member is provided between each of the two limit blocks and the pulley module, and the second guide member is in line contact with the corresponding guide inclined surface respectively; When there are two or more pulley modules, a third guide member is further provided between adjacent pulley modules, and the third guide member is in line contact with the guide slopes on both sides and in line contact with the bottom of the frame; The pulley module can protrude or retract a portion of the frame.

2. The adjustable pulley device according to claim 1, characterized in that The limiting block is provided with a second guide slot corresponding to the pulley module, and the second guide member is held between the second guide slot and the guide inclined surface.

3. The adjustable pulley device according to claim 2, characterized in that The third guide member and the second guide member are circular cylinders, and respectively abut against the guide slope and the bottom of the frame through the arc surfaces of the circular cylinders.

4. The adjustable pulley device according to any one of claims 1 to 3, characterized in that: The pulley module also includes a roller or a bearing rotatably connected to the support frame. The support frame includes support plates arranged in parallel. The roller or the bearing is located between the two support plates, and part of the roller or the bearing is exposed from the frame.

5. The adjustable pulley device according to claim 4, characterized in that The pulley module further includes a buffer pad arranged between the support plates, the buffer pad is located on opposite sides of the roller or the bearing in the radial direction, and an arc groove is provided on the buffer pad, and the arc groove is used to cooperate with the track of the frame.

6. The adjustable pulley device according to claim 1, wherein: One side of the frame opening is provided with an inwardly bent edge, and the edge can be clamped with the support plate.

7. The adjustable pulley device according to claim 1, wherein: The frame is integrally bent and formed.

8. An adjustable pulley device, characterized in that: include: A frame is provided in an elongated strip shape, wherein at least one pulley module is provided in the frame along the length direction, a slider and a limit block are provided at both ends of the frame, and the slider is capable of sliding relative to the frame, and an adjustment member is provided at one end of the frame, and the adjustment member is connected to the slider; The pulley module includes a support frame slidably connected to the frame, and the support frame is provided with guide inclined surfaces on opposite sides along the length direction of the frame; When there is only one pulley module, a first guide is provided between the slider and the pulley module, and a second guide is provided between the limit block and the pulley module, and the first guide and the second guide are respectively in line contact with the corresponding guide inclined surface; When there are two or more pulley modules, a third guide member is further provided between adjacent pulley modules, and the third guide member is in line contact with the guide slopes on both sides and in line contact with the bottom of the frame; When the adjusting member drives the slider to slide relative to the frame, the pulley module can protrude or retract a portion of the frame.

9. The adjustable pulley device according to claim 8, characterized in that The slider includes a first guide slot corresponding to the pulley module. A first guide member is provided between the slider and the adjacent pulley module. The first guide member is supported between the first guide slot and the guide inclined surface.

10. The adjustable pulley device according to claim 8, wherein: The slider includes a threaded hole corresponding to the adjusting member, and the adjusting member is connected to the slider through the threaded hole.

11. The adjustable pulley device according to claim 10, wherein: The adjusting member includes a force-applying portion, a connecting portion and a threaded portion connected in sequence. The diameter of the connecting portion is smaller than the diameter of the threaded portion. A limiting plate is also provided in the frame. The limiting plate is clamped on the connecting portion to limit the adjusting member.

12. An adjustable pulley device, characterized in that: include: A frame arranged in an elongated strip shape, wherein at least one pulley module is arranged in the longitudinal direction of the frame, and a slider and a limit block are respectively provided at both ends of the frame, and the slider can slide relative to the frame; The pulley module includes a support frame slidably connected to the frame, and the support frame is provided with guide inclined surfaces on opposite sides along the length direction of the frame; When there is only one pulley module, a first guide is provided between the slider and the pulley module, and a second guide is provided between the limit block and the pulley module, and the first guide and the second guide are respectively in line contact with the corresponding guide inclined surface; When there are two or more pulley modules, a third guide member is further provided between adjacent pulley modules, and the third guide member is in line contact with the guide slopes on both sides and in line contact with the bottom of the frame; The pulley module can protrude or retract a portion of the frame.

13. The adjustable pulley device according to claim 12, wherein: An adjusting member is provided at one end of the frame, and the adjusting member is connected to the slider; when the adjusting member drives the slider to slide relative to the frame, the pulley module can protrude or retract a portion of the frame.

14. A door and window, characterized in that: It comprises a frame with a track, a wing sash of a door or window, and an adjustable pulley device according to any one of claims 1 to 13, wherein the wing sash is connected to the track of the frame through the adjustable pulley device.

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