Adjustable door and window pulley

Abstract

The utility model discloses an adjustable door and window pulley, which relates to the technical field of door and window accessories, and comprises an outer shell and an inner shell provided with a plurality of rollers, and the inner shell can be pushed by an adjusting screw to obliquely slide relative to the outer shell; the inner shell is arranged in the containing cavity of the outer shell through the support, the adjusting screw abuts against the rear end of the support, the two sides of the support are provided with limiting parts capable of sliding in the limiting grooves of the outer shell, and the limiting parts form a plurality of limiting straight faces used for preventing the inner shell from overturning. Compared with the prior art, the limiting part of the support can be matched with the limiting groove to prevent the inner shell from overturning relative to the outer shell, meanwhile, the square blind groove formed in the outer shell can facilitate replacement of the square nut, and the maintenance cost of the pulley is saved.

Description

Technical Field

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

[0002] Doors and windows generally realize their push-pull functions by installing pulleys. After searching, the patent with the announcement number "CN204238720U" discloses a pulley mechanism, which is mainly used to solve the technical problem that the inner shell of the traditional pulley is easy to flip.

[0003] Similarly, the applicant also designed an adjustable door and window pulley and accordingly filed the following application. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the utility model provides an adjustable door and window pulley.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an adjustable door and window pulley, including an outer shell and an inner shell provided with a plurality of rollers, the inner shell can be pushed by an adjusting screw to tilt and slide relative to the outer shell; the inner shell is installed in the cavity of the outer shell through a bracket, the adjusting screw and the rear end of the bracket abut against each other, and the two sides of the bracket have limiting parts that can slide in the limiting grooves of the outer shell, and the limiting parts form a plurality of limiting straight surfaces for preventing the inner shell from flipping over.

[0006] Preferably, the bracket includes a connecting end and a sliding end; the housing cavity corresponding to the sliding end is provided with a sliding guide groove formed by two ribs relatively enclosed, and the sliding end of the bracket is slidably matched with the sliding guide groove through a sliding convex edge.

[0007] Preferably, the housing is further formed with a square blind groove for accommodating a square nut, and the tightening screw passes through the square blind groove from the rear end of the housing and cooperates with the square nut thread.

[0008] Preferably, the housing cavity of the shell is formed with a positioning guide groove, and the connecting end of the bracket is correspondingly formed with a positioning strip, and the positioning strip can be inserted into the avoidance groove at the top of the shell.

[0009] Preferably, a stop strip which can abut against the inner wall of the cavity is formed on the top of the sliding end of the bracket.

[0010] Preferably, the adjusting screw abuts against an abutment groove provided at the sliding end of the bracket.

[0011] Preferably, an embedding block is formed on the top of the inner shell, and the connecting end of the bracket is embedded and fixed with the inner shell through the embedding block.

[0012] Preferably, the roller is an inlaid roller, and its bearing and core shaft are fixed to each other to form an integral body.

[0013] Preferably, the bottom of the roller does not exceed the bottom edge of the inner shell, and rail grooves are formed at the front and rear ends of the inner shell.

[0014] Compared with the prior art, the utility model has at least the following advantages:

[0015] 1. The limiting part of the bracket can cooperate with the limiting groove to prevent the inner shell and the outer shell from flipping relative to each other;

[0016] 2. The square blind groove of the shell can facilitate the replacement of square nuts and save maintenance costs;

[0017] 3. The bearing and core shaft of the injection-molded roller are integrated into one design, which has a stronger load-bearing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is a disassembly schematic diagram of the utility model.

[0020] Figure 3 It is a cross-sectional schematic diagram of the utility model.

[0021] Figure 4 It is a schematic diagram of the structure of the shell.

[0022] Figure 5 It is a schematic diagram of the structure of the inner shell.

[0023] Figure 6 It is a schematic diagram of the structure of the bracket.

[0024] In the figure, 1-outer shell; 101-sliding guide groove; 111-rib; 102-limiting groove; 103-aligning guide groove; 104-avoiding groove; 105-square blind groove; 2-inner shell; 201-embedded block; 202-rail groove; 3-roller; 4-bracket; 401-connecting end; 411-limiting part; 421-aligning strip; 402-sliding end; 412-sliding convex edge; 422-abutting groove; 432-stop strip; 5-adjusting screw; 6-square nut. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1-Figure 6As shown: an adjustable door and window pulley, including an outer shell 1 and an inner shell 2, two rollers 3 are rotatably installed in the inner shell 2, the top of the inner shell 2 forms an insert block 201 with a cross section similar to a sphere, a bracket 4 is embedded in the top of the inner shell 2 through the insert block 201, and is installed together with the inner shell 2 in the cavity formed by the outer shell 1, an adjusting screw 5 passing through the outer shell 1 has one end abutting against the rear end of the bracket 4, and the adjusting screw 5 is used to adjust the height difference between the outer shell 1 and the inner shell 2.

[0027] Furthermore, the bracket 4 includes a connecting end 401 for combining with the inner shell 2, and a sliding end 402 abutted and pushed by the adjusting screw 5, and the connecting end 401 and the sliding end 402 are an integrally formed structural design.

[0028] Specifically, Figure 4 As shown, the rear end of the housing cavity of the outer shell 1 has an inclined sliding guide groove 101, and the sliding guide groove 101 is formed by two opposite ribs 111. The sliding protrusion 412 provided at the sliding end 402 of the bracket 4 is inserted into the sliding guide groove 101. Since the adjusting screw 5 has one end with a top head abutting against the abutting groove 422 of the sliding end 402 of the bracket 4, when the adjusting screw 5 is screwed in and out, the cooperation between the sliding protrusion 412 and the sliding guide groove 101 can make the bracket 4 tilt and slide as a whole, thereby correspondingly adjusting the height difference between the outer shell 1 and the inner shell 2.

[0029] Specifically, the two sides of the shell 1 are formed with limiting grooves 102, and the connection end of the bracket 4 forms a limiting portion 411 corresponding to the limiting grooves 102. Since the limiting portion 411 has a plurality of limiting straight surfaces matching the contour of the limiting grooves 102, the bracket 4 can only tilt and slide in the shell 1, and will not flip relative to it. At the same time, in order to avoid the possible left and right deviation problem, the cavity of the shell 1 is also formed with a positioning guide groove 103, and the top of the connection end 402 of the bracket 4 is formed with a positioning strip 421. When the shell 1 and the inner shell 2 slide relatively, the positioning strip 421 can always be limited by the two sides of the positioning guide groove 103, so as to continuously align the bracket 4 and the inner shell 2.

[0030] Specifically, a stop strip 432 is formed on the top of the sliding end 402 of the above-mentioned bracket 4, and an avoidance groove 104 is formed on the outer shell 1. When the adjusting screw 5 is screwed out so that the stop strip 432 abuts against the inner wall of the outer shell cavity, the height difference between the outer shell 1 and the inner shell 2 is minimized, and at this time the alignment strip 422 will penetrate into the avoidance groove 104.

[0031] Furthermore, since the screwing in and out of the adjusting screw 5 needs to be realized by means of the thread structure provided on the housing 1, if the thread is directly formed on the housing, the entire housing 1 needs to be replaced after the thread is worn, which easily increases the use cost of the pulley. Therefore, in the present design, the thread structure is a replaceable square nut 6, and a square blind groove 105 is formed on the side of the housing 1, and the square nut can be directly inserted into the square blind groove 105.

[0032] Furthermore, for some doors and windows, if the roller 3 can be prevented from being exposed outward after installation, the overall aesthetic feeling of the doors and windows can be significantly improved. Therefore, in the present design, the roller 3 is hidden and installed in the inner shell 2, that is, the bottom of the roller 3 will not exceed the bottom edge of the inner shell 2, and the front and rear ends of the inner shell 2 are formed with rail grooves 202.

[0033] Furthermore, the roller 3 of the present design is an inlaid roller with an integrated bearing and spindle design. Compared with the traditional separate structure, the inlaid roller is more compact as a whole and has less gaps. Therefore, it has a stronger load-bearing capacity for some ultra-heavy doors and windows.

[0034] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. An adjustable door and window pulley, comprising an outer shell (1) and an inner shell (2) provided with a plurality of rollers (3), wherein the inner shell (2) can be pushed by an adjusting screw (5) to tilt and slide relative to the outer shell (1); characterized in that: The inner shell (2) is installed in the cavity of the outer shell (1) through the bracket (4), the adjusting screw (5) and the rear end of the bracket (4) are in contact with each other, and the bracket (4) has limiting parts (411) on both sides that can slide in the limiting groove (102) of the outer shell (1), and the limiting parts (411) form a plurality of limiting straight surfaces for preventing the inner shell (2) from turning over.

2. The adjustable door and window pulley according to claim 1, characterized in that: The bracket (4) comprises a connecting end (401) and a sliding end (402); the housing (1) cavity corresponding to the sliding end (402) is provided with a sliding guide groove (101) formed by two ribs (111) relatively enclosing each other, and the sliding end (402) of the bracket (4) is slidably matched with the sliding guide groove (101) via a sliding convex edge (412).

3. The adjustable door and window pulley according to claim 2, characterized in that: The housing (1) is also formed with a square blind groove (105) for accommodating the square nut (6); the tightening screw (5) passes through the square blind groove (105) from the rear end of the housing (1) and is threadedly engaged with the square nut (6).

4. The adjustable door and window pulley according to claim 2, characterized in that: The housing cavity of the housing (1) is formed with a positioning guide groove (103), and the connection end (401) of the bracket (4) is correspondingly formed with a positioning strip (421), and the positioning strip (421) can be inserted into the avoidance groove (104) at the top of the housing (1).

5. The adjustable door and window pulley according to claim 4, characterized in that: A stopper strip (432) capable of abutting against the inner wall of the cavity is formed at the top of the sliding end (402) of the bracket (4).

6. The adjustable door and window pulley according to claim 2, characterized in that: The adjusting screw (5) abuts against an abutment groove (422) provided at the sliding end (402) of the bracket (4).

7. The adjustable door and window pulley according to claim 1, characterized in that: An insert block (201) is formed on the top of the inner shell (2), and the connecting end (401) of the bracket (4) is embedded and fixed with the inner shell (2) through the insert block (201).

8. The adjustable door and window pulley according to claim 1, characterized in that: The roller (3) is an injection-molded roller, and its bearing and core shaft are fixed to each other to form an integral body.

9. An adjustable door and window pulley according to any one of claims 1 to 8, characterized in that: The bottom of the roller (3) does not exceed the bottom edge of the inner shell (2), and rail grooves (202) are formed at the front and rear ends of the inner shell (2).

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