Pulley for side tightening doors and windows

Abstract

The utility model discloses a pulley for a side tight door and window, which comprises a pulley shell and a wheel, the pulley shell is provided with a U-shaped pulley cavity, the wheel is mounted in the pulley cavity, and the top of the outer side of the pulley cavity of the pulley shell is provided with a track notch larger than a semicircle and is matched with a circular track at the bottom of a window sash profile. The whole sliding wheel can swing freely, in the locking state, the window sash and the sectional material with the rubber strip can achieve the mutual pressing effect, no gap is reserved any more, and the air tightness and the waterproof performance of the door and window are improved. And when machining errors exist in the door and window sash, the door and window sash cannot be affected, and pushing is smooth.

Description

Technical Field

[0001] The utility model relates to the technical field of door and window hardware, in particular to a pulley for side-tightening doors and windows. Background Art

[0002] At present, the installation and fixing method of pulleys for doors and windows generally adopts screws, which brings the following defects:

[0003] 1. The pulley cannot swing freely, the error correction effect is poor, and the window sash and the profile with the rubber strip cannot be pressed against each other, resulting in gaps in the doors and windows when they are locked, which greatly reduces the air tightness and waterproofness of the doors and windows.

[0004] 2. Because the current door and window pulley installation and fixing method generally adopts screw fixing installation, the pulley cannot adjust itself. When there is an error in the installation of the pulley or the processing of the door and window profile has an error, it takes a lot of force to push. Utility Model Content

[0005] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and to provide a pulley for side-tightening doors and windows, by arranging a track groove larger than a semicircle at the top of the outer side of the pulley cavity of the pulley housing, which cooperates with the circular track at the bottom of the window sash profile, so that the pulley can swing freely, and there is no gap when the doors and windows are locked, thereby improving the air tightness and waterproofness of the doors and windows.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A pulley for side-tight doors and windows comprises a pulley housing and a wheel. The pulley housing has a U-shaped pulley cavity, the wheel is installed in the pulley cavity, and the top of the outer side of the pulley cavity of the pulley housing has a track groove larger than a semicircle, which cooperates with the circular track at the bottom of the window sash profile.

[0008] Preferably, both sides of the bottom of the pulley housing are provided with positioning folds to prevent the door and window from tilting excessively.

[0009] Preferably, the track slot opens upward.

[0010] The utility model has the following advantages and positive effects:

[0011] 1. With the cooperation of the track groove of the pulley and the bottom track of the window (door) sash profile, the pulley can swing freely. When the doors and windows are locked, the window sash can press against the profile with the rubber strip, and no gap is left, which improves the air tightness and waterproofness of the doors and windows.

[0012] 2. The pulley can be adjusted by itself. Even if there are errors in the processing of door and window panels, it will not be affected and can still be pushed smoothly.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0015] Figure 1 The overall structure of the pulley for side tightening doors and windows of the utility model is shown in FIG. Figure 1 ;

[0016] Figure 2 The overall structure of the pulley for side tightening doors and windows of the utility model is shown in FIG. Figure 2 ;

[0017] Figure 3 It is a cross-sectional schematic diagram of the cooperation between the pulley for side-tightening doors and windows and the window sash profile of the utility model;

[0018] Explanation of symbols in the figure:

[0019] 10. Pulley housing; 11. Pulley cavity; 12. Positioning fold; 20. Wheel; 30. Track slot; 40. Window sash profile; 41. Circular track. DETAILED DESCRIPTION

[0020] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0021] Reference Figure 1-3 The utility model embodiment of the side-tightening door and window pulley comprises a pulley housing 10 and a wheel 20. The pulley housing 10 has a U-shaped pulley cavity 11. The wheel 20 is installed in the pulley cavity 11. The top of the outer side of the pulley cavity 11 of the pulley housing 10 has a track slot 30 larger than a semicircle. The track slot 30 opens upward and cooperates with the circular track 41 at the bottom of the window sash profile 40. The cross-section of the track slot 30 is larger than a semicircle to prevent it from being disengaged from the upper circular track. Figure 3 As shown, during operation, the pulley as a whole can swing left and right and adjust itself according to the actual gap. The two sides of the bottom of the pulley housing 10 are provided with positioning folds 12 to prevent the door and window from tilting excessively.

[0022] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A pulley for side-tightening doors and windows, comprising a pulley housing and a wheel, wherein the pulley housing has a U-shaped pulley cavity, and the wheel is installed in the pulley cavity, characterized in that: The top of the outer side of the pulley cavity of the pulley housing is provided with a track groove larger than a semicircle, which matches with the circular track at the bottom of the window sash profile.

2. The pulley for side tightening doors and windows according to claim 1, characterized in that: Both sides of the bottom of the pulley housing are provided with positioning folded edges.

3. The pulley for side tightening doors and windows according to claim 1, characterized in that: The track slot is open upward.

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