Pulley mechanism with wheel track adjusting function

Abstract

The utility model relates to the technical field of door and window hardware, in particular to a pulley mechanism with a wheel track adjusting function, which comprises a gear, a first gear and a second connecting frame, the first connecting frame and the second connecting frame are in sliding connection and are in meshing transmission with the gear; therefore, when the gear rotates around the axis of the gear, the first connecting frame and the second connecting frame can be driven to move close to each other or away from each other. A first roller and a second roller are respectively arranged on the first connecting frame and the second connecting frame; when the first connecting frame and the second connecting frame move close to each other, the distance between the first rolling wheel and the second rolling wheel can be shortened; when the first connecting frame and the second connecting frame move away from each other, the distance between the first rolling wheel and the second rolling wheel can be enlarged; and the distance is further adjusted to adapt to profiles with different sizes. Besides, in the installation process, the overall width of the first connecting frame and the second connecting frame can be shortened, so that the convenience of installation and use is improved through slotting of the sliding rail.

Description

Technical Field

[0001] The utility model relates to the technical field of door and window hardware, in particular to a pulley mechanism with a wheelbase adjustment function. Background Art

[0002] With the improvement of living standards, people have higher and higher requirements for living environment, and the requirements for doors and windows are also constantly improving. There are more and more types of doors and windows used for sealing structures. People can choose different types of doors and windows according to different needs. Among the many doors and windows, sliding doors and windows have been widely used because of their advantages such as easy opening and closing and not taking up indoor space.

[0003] The pulley mechanism is a crucial component in enabling sliding doors and windows to open or close. The pulley mechanism includes a roller, mounted on top of the sash profile and fixed relative to the sash profile. The roller rolls along a track within the frame profile, enabling the sliding operation of the door or window. Due to manufacturing errors in the profile, the track dimensions within the profile do not match the roller dimensions. This makes existing pulley mechanisms incompatible with the profile dimensions, hindering their installation and, in turn, the proper operation of sliding doors and windows. Utility Model Content

[0004] Based on this, the purpose of the present invention is to provide a pulley mechanism with a wheelbase adjustment function.

[0005] The utility model adopts the following technical solutions:

[0006] A pulley mechanism with a wheelbase adjustment function comprises a gear, a first connecting frame and a second connecting frame; the first connecting frame is provided with a first groove, and the first connecting frame is provided with a first roller; the second connecting frame is provided with a second groove, and the second connecting frame is provided with a second roller; the first connecting frame and the second connecting frame are slidingly connected so that the first groove and the second groove are spliced ​​to form an installation cavity; the gear is arranged in the installation cavity, and at least one of the first connecting frame and the second connecting frame is meshed with the gear for transmission; the rotation of the gear drives the first connecting frame and the second connecting frame to move closer or farther away to adjust the distance between the first roller and the second roller.

[0007] Preferably, a rack structure is provided in each of the first groove and the second groove, and the rack structure is meshed with the gear for transmission.

[0008] Preferably, the first groove and the second groove are both extended with a supporting groove arranged perpendicular thereto, and the gear abuts against the supporting groove.

[0009] Preferably, a first overlapping fitting portion is provided between the first connecting frame and the second connecting frame, and the first overlapping fitting portion includes a first positioning groove and a first positioning column matching the first positioning groove; when the first connecting frame and the second connecting frame slide relative to each other, the first positioning column slides in the first positioning groove.

[0010] Preferably, a second overlapping fitting portion is provided between the first connecting frame and the second connecting frame, and the second overlapping fitting portion includes a second positioning groove and a second positioning column matching the second positioning groove; when the first connecting frame and the second connecting frame slide relative to each other, the second positioning column slides in the second positioning groove.

[0011] Preferably, an adjustment component is further included, the adjustment component includes a movable part, one end of the movable part is connected to the gear, and the movable part rotates to drive the gear to rotate synchronously.

[0012] Preferably, the outer wall of the movable part is provided with bilaterally symmetrical air-avoiding levels, and the air-avoiding levels extend along the axial direction of the movable part.

[0013] Preferably, the adjustment assembly further includes a locking member, which is sleeved on the movable member; the locking member moves along the axial direction of the movable member to lock the first connecting frame and the second connecting frame.

[0014] Preferably, the ends of the first connecting frame and the second connecting frame which are away from each other are each provided with a mounting groove which is recessed along the thickness direction thereof, and the first roller and the second roller are rotatably connected in the mounting groove.

[0015] Preferably, the bottom surface of the mounting groove is an inclined surface.

[0016] The beneficial effects of the utility model are:

[0017] The pulley mechanism with wheelbase adjustment function involved in the present invention includes a gear, a first gear and a second connecting frame. Since the first connecting frame and the second connecting frame are slidably connected and mesh with the gear, when the gear rotates around its own axis, it can drive the first connecting frame and the second connecting frame to move closer or farther away. A first roller and a second roller are respectively provided on the first connecting frame and the second connecting frame. When the first connecting frame and the second connecting frame move closer, the distance between the first roller and the second roller can be shortened; when the first connecting frame and the second connecting frame move farther away, the distance between the first roller and the second roller can be expanded. The distance can then be adjusted to accommodate profiles of different sizes. In addition, during the installation process, the overall width of the first connecting frame and the second connecting frame can be shortened to facilitate the passage through the slots of the slide rail, thereby improving the convenience of installation and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the pulley mechanism with wheelbase adjustment function of the present invention;

[0019] Figure 2 for Figure 1 Exploded diagram of the pulley mechanism;

[0020] Figure 3 for Figure 1 A top view of the pulley mechanism in a first working state;

[0021] Figure 4 for Figure 3 Schematic diagram of the pulley mechanism installed in front of the slide rail;

[0022] Figure 5 for Figure 1 A top view of the pulley mechanism in a second working state;

[0023] Figure 6 for Figure 5 Schematic diagram of the pulley mechanism after being installed in the slide rail;

[0024] Numbers in the figure:

[0025] 100- pulley mechanism;

[0026] 10-Gear;

[0027] 20 - first connecting frame; 21 - first groove; 22 - first roller; 23 - first rack; 24 - support groove; 25 - mounting groove; 251 - inclined surface; 252 - mounting hole; 253 - rotating shaft;

[0028] 30-second connecting frame; 31-second groove; 32-second roller; 33-second rack;

[0029] 40-installation cavity;

[0030] 50-movable parts; 51-avoiding horizontal position;

[0031] 60-locking piece;

[0032] 70-first positioning groove; 71-first positioning column; 80-second positioning groove; 81-second positioning column;

[0033] 200-slide rail; 300-opening slot. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] In the description of this utility model, it should be noted that the terms "vertical," "upper," "lower," and "horizontal," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, direct connections, connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0037] like Figures 1 to 2 FIG. 1 shows a pulley mechanism 100 with a wheelbase adjustment function according to an embodiment of the present invention. The pulley mechanism 100 includes a gear 10, a first connecting frame 20, and a second connecting frame 30. The first connecting frame 20 is provided with a first groove 21, on which a first roller 22 is provided. The second connecting frame 30 is provided with a second groove 31, on which a second roller 32 is provided. The first connecting frame 20 and the second connecting frame 30 are capable of sliding relative to each other after assembly, and the first groove 21 and the second groove 31 are spliced ​​together to form a mounting cavity 40. The gear 10 is disposed within the mounting cavity 40, and at least one of the first connecting frame 20 and the second connecting frame 30 is meshed with the gear 10 for transmission. When the gear 10 rotates about its own axis, it can drive the first connecting frame 20 and the second connecting frame 30 to move closer or farther away, thereby adjusting the distance between the first roller 22 and the second roller 32.

[0038] In this embodiment, the first connecting frame 20 and the second connecting frame 30 are slidably connected and both mesh with the gear 10 for transmission. Therefore, when the gear 10 rotates about its own axis, it can drive the first connecting frame 20 and the second connecting frame 30 to move synchronously in opposite directions. At the same time, the first roller 22 is mounted on the end of the first connecting frame 20 away from the gear 10, and the second roller 32 is mounted on the end of the second connecting frame 30 away from the gear 10. Therefore, when the first connecting frame 20 and the second connecting frame 30 move away from each other, the distance between the first roller 22 and the second roller 32 along the thickness direction gradually increases. Conversely, when the first connecting frame 20 and the second connecting frame 30 move closer to each other, the distance between the first roller 22 and the second roller 32 along the thickness direction gradually decreases. The above steps are used to adjust the distance between the first roller 22 and the second roller 32 to adapt to the size of the track provided in the profile.

[0039] In addition, Figures 3 to 6 As shown, when the pulley mechanism 100 is installed in the slide rail 200, the distance between the first roller 22 and the second roller 32 can be reduced, so that the overall width of the pulley mechanism 100 is smaller than the width of the opening groove 300 of the slide groove 200. This allows the pulley mechanism 100 to be installed into the slide rail 200 from bottom to top through the opening groove 300 or to be removed from the slide rail 200 from top to bottom, thereby realizing the installation, use and removal of the pulley mechanism 100 and improving the convenience of installation and use.

[0040] See also Figure 2 In one embodiment, a first rack 23 and a second rack 33 are disposed in the first groove 21 and the second groove 31, respectively. Both the first rack 23 and the second rack 33 mesh with the gear 10, thereby achieving synchronous counter-rotating motion of the first connecting frame 20 and the second connecting frame 30. In another embodiment, two mutually meshing eccentric gears 10 may be used, each meshing with the first rack 23 and the second rack 33, respectively, to also achieve synchronous counter-rotating motion of the first connecting frame 20 and the second connecting frame 30.

[0041] See also Figure 2 The first groove 21 and the second groove 31 are both extended with a support groove 24 arranged perpendicular thereto. Due to the provision of the support groove 24, when the gear 10 is assembled into the mounting cavity 40, the support groove 24 can support the gear 10, thereby preventing the gear 10 from being separated from the mounting cavity 40, and improving the stability of the transmission cooperation between the gear 10 and the rack structure.

[0042] See also Figure 1 and Figure 2The pulley mechanism 100 provided in one embodiment of the present invention further includes an adjustment assembly, which includes a movable member 50. One end of the movable member 50 is connected to the gear 10. The movable member 50 rotates to drive the gear 10 to rotate synchronously. By manually rotating the movable member 50, the gear 10 rotates synchronously with the movable member 50, thereby achieving synchronous reverse movement of the first connecting frame 20 and the second connecting frame 30, thereby facilitating adjustment of the spacing between the first roller 22 and the second roller 32. The movable member 50 and the gear 10 can be connected by welding, dispensing, integral molding, etc. In this embodiment, the movable member 50 is specifically a bolt, which is rotated by a screwdriver to adjust the spacing between the first roller 22 and the second roller 32, making adjustment convenient.

[0043] Furthermore, the outer wall of the movable part 50 is provided with bilaterally symmetrical air avoidance levels 51, which extend along the axial direction of the movable part 50; the air avoidance levels 51 provide space, and the operator can use tools such as wrenches to clamp the air avoidance levels 51, which is convenient for rotating the movable part 50, thereby driving the gear 10 to rotate.

[0044] See also Figure 1 and Figure 2 Specifically, the adjustment assembly also includes a locking member 60, which is sleeved on the movable member 50. The locking member 60 moves along the axial direction of the movable member 50. After moving a certain distance, the locking member 60 abuts against the bottom of the first connecting frame 20 and the second connecting frame 30 to lock the first connecting frame 20 and the second connecting frame 30.

[0045] See also Figure 2 A first overlapping portion is provided between the first connecting frame 20 and the second connecting frame 30. The first overlapping portion includes a first positioning groove 70 and a first positioning post 71 that cooperates with the first positioning groove 70. In this embodiment, both the first connecting frame 20 and the second connecting frame 30 are provided with the first positioning groove 70, and the second connecting frame 30 and the first connecting frame 20 are provided with corresponding first positioning posts 71, that is, two sets of first overlapping portions are provided. When the first connecting frame 20 and the second connecting frame 30 are assembled, the raised first positioning post 71 is inserted into the recessed first positioning groove 70, guiding the synchronous reverse movement of the first connecting frame 20 and the second connecting frame 30, so that the first roller 22 and the second roller 32 always remain parallel, thereby ensuring smooth sliding and operating reliability of the door and window. In other embodiments, only one set of first overlapping portions may be provided.

[0046] See also Figure 2A second overlapping fitting portion is provided between the first connecting frame 20 and the second connecting frame 30; the second overlapping fitting portion includes a second positioning groove 80 and a second positioning column 81 that cooperates with the second positioning groove 80; in this embodiment, the first connecting frame 20 and the second connecting frame 30 are both provided with a second positioning groove 80, and at the same time, the second connecting frame 30 and the first connecting frame 20 are correspondingly provided with a second positioning column 81. Through the cooperation between the second positioning groove 80 and the second positioning column 81, the first connecting frame 20 and the second connecting frame 30 are overlapped with each other.

[0047] See also Figure 2 The ends of the first connecting frame 20 and the second connecting frame 30, facing away from each other, each have a mounting groove 25 recessed along their thickness. The first roller 22 and the second roller 32 are rotatably connected within the mounting groove 25. Specifically, the bottom surface of the mounting groove 25 is an inclined surface 251 extending along the recessed direction of the mounting groove 25 and toward one end. The inclined surface 251 has a mounting hole 252 formed therein. A rotating shaft 253 is inserted into the mounting hole 252. The first roller 22 and the second roller 32 are rotatably connected to the rotating shaft 253, thereby mounting the first roller 22 and the second roller 32 within the mounting groove 25. Due to the provision of the inwardly recessed mounting groove 25 and the installation of the first roller 22 and the second roller 32 within the mounting groove 25, the overall thickness of the pulley mechanism 100 can be reduced, thereby reducing the space occupied.

[0048] Compared to the prior art, the pulley mechanism 100 with wheelbase adjustment function disclosed herein includes a gear 10, a first gear 10, and a second connecting frame 30. Because the first connecting frame 20 and the second connecting frame 30 are slidably connected and mesh with the gear 10, the gear 10 rotates about its axis, driving the first connecting frame 20 and the second connecting frame 30 toward or away from each other. A first roller 22 and a second roller 32 are provided on the first connecting frame 20 and the second connecting frame 30, respectively. When the first connecting frame 20 and the second connecting frame 30 move toward each other, the distance between the first roller 22 and the second roller 32 is shortened; when the first connecting frame 20 and the second connecting frame 30 move away from each other, the distance between the first roller 22 and the second roller 32 is increased. This distance is thus adjustable to accommodate profiles of varying sizes. Furthermore, during installation, the overall width of the first connecting frame 20 and the second connecting frame 30 can be shortened to facilitate passage through the slots in the slide rails, improving installation and ease of use.

[0049] The above merely represents the preferred technical solution of the present invention. While the description is relatively specific and detailed, it should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the concept of the present invention, and the present invention is intended to encompass such modifications and variations.

Claims

1. A pulley mechanism with a wheelbase adjustment function, characterized in that: It includes a gear, a first connecting frame and a second connecting frame; the first connecting frame is provided with a first groove, and the first connecting frame is provided with a first roller; the second connecting frame is provided with a second groove, and the second connecting frame is provided with a second roller; the first connecting frame and the second connecting frame are slidingly connected so that the first groove and the second groove are spliced ​​to form an installation cavity; the gear is arranged in the installation cavity, and at least one of the first connecting frame and the second connecting frame is engaged with the gear for transmission; the rotation of the gear drives the first connecting frame and the second connecting frame to move closer or farther away to adjust the distance between the first roller and the second roller.

2. The pulley mechanism with wheelbase adjustment function according to claim 1, characterized in that: A rack structure is provided in each of the first groove and the second groove, and the rack structure is meshed with the gear for transmission.

3. The pulley mechanism with wheelbase adjustment function according to claim 1, characterized in that: The first groove and the second groove are both extended with a supporting groove arranged perpendicular thereto, and the gear abuts against the supporting groove.

4. The pulley mechanism with wheelbase adjustment function according to claim 1, characterized in that: A first overlapping fitting portion is provided between the first connecting frame and the second connecting frame, and the first overlapping fitting portion includes a first positioning groove and a first positioning column matching the first positioning groove; when the first connecting frame and the second connecting frame slide relative to each other, the first positioning column slides in the first positioning groove.

5. The pulley mechanism with wheelbase adjustment function according to claim 1, characterized in that: A second overlapping fitting portion is provided between the first connecting frame and the second connecting frame, and the second overlapping fitting portion includes a second positioning groove and a second positioning column matching the second positioning groove; when the first connecting frame and the second connecting frame slide relative to each other, the second positioning column slides in the second positioning groove.

6. The pulley mechanism with wheelbase adjustment function according to claim 1, characterized in that: The utility model further comprises an adjusting component, wherein the adjusting component comprises a movable part, one end of the movable part is connected to the gear, and the movable part rotates to drive the gear to rotate synchronously.

7. The pulley mechanism with wheelbase adjustment function according to claim 6, characterized in that: The outer wall of the movable part is provided with bilaterally symmetrical air-avoiding flat positions, and the air-avoiding flat positions extend along the axial direction of the movable part.

8. The pulley mechanism with wheelbase adjustment function according to claim 6, characterized in that: The adjustment assembly further includes a locking member, which is sleeved on the movable member; the locking member moves along the axial direction of the movable member to lock the first connecting frame and the second connecting frame.

9. The pulley mechanism with wheelbase adjustment function according to claim 1, characterized in that: The ends of the first connecting frame and the second connecting frame which are away from each other are each provided with a mounting groove which is recessed along the thickness direction thereof, and the first roller and the second roller are rotatably connected in the mounting groove.

10. The pulley mechanism with wheelbase adjustment function according to claim 9, characterized in that: The bottom surface of the mounting groove is an inclined surface.

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