Anti-loosening pulley block

Abstract

The utility model discloses an anti-loosening pulley block which comprises a pulley seat, a plurality of pulleys mounted on the pulley seat, a mounting cavity with an upward opening arranged on the pulley seat, a rotatable adjusting nut mounted in the mounting cavity, a worm wheel surface arranged on the top surface of the adjusting nut, and an adjusting worm mounted in the pulley seat and in transmission connection with the worm wheel surface. An annular groove is formed in the adjusting worm, a plurality of arrayed concave points are arranged at the groove bottom of the annular groove in the circumferential direction, an anti-loosening screw is installed in the pulley base, protruding points are arranged at the positions, corresponding to the concave points, of the end of the anti-loosening screw, and the protruding points are inserted into the concave points. On the one hand, the convex points are matched with the concave points, so that the situation that the adjusting worm is separated from the worm wheel surface to cause transmission failure can be effectively prevented, and on the other hand, the convex points are matched with the concave points to effectively prevent the adjusting worm from automatically rotating to cause the change of the height of the sliding door.

Description

Technical Field

[0001] The utility model relates to a sliding door, in particular to an anti-loosening pulley block. Background Art

[0002] The existing sliding door generally has a pulley block installed on the top of the glass door, which is hung on the slide rail through the pulley block to achieve the effect of sliding the door open. Due to factors such as installation error and adjustment, the height of the left and right doors will be different. Therefore, it is necessary to adjust the distance between the pulley block and the glass door to make the glass door flush. The existing pulley block generally includes a pulley member slidably installed on the slide rail and an adjustment seat installed on the top surface of the door. The pulley member and the adjustment seat are connected by a rotating screw. An adjusting nut that cooperates with the rotating screw is arranged on the pulley member. When the rotating screw is rotated, the position of the pulley member and the adjusting seat changes, thereby playing the role of adjusting the sliding door. A worm gear surface is arranged at the bottom of the rotating screw, and an adjusting worm that cooperates with the worm gear surface transmission is arranged on the side wall of the adjusting seat. The rotating screw can be rotated by rotating the adjusting worm. The existing method is to install a locking screw on the adjusting seat. The end of the anti-loosening screw is pressed against the rotating screw to prevent it from rotating, thereby achieving the anti-loosening effect. Since the anti-loosening screw directly presses against the thread surface of the rotating screw, if the force is too light, the anti-loosening effect cannot be achieved. If the force is too strong, it is easy to cause damage to the thread surface of the rotating screw. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a pulley block that prevents loosening.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A pulley block for preventing loosening comprises a pulley seat, a plurality of pulleys are mounted on the pulley seat, a mounting cavity opening upward is provided on the pulley seat, a rotatable adjusting nut is mounted in the mounting cavity, a worm gear surface is provided on the top surface of the adjusting nut, an adjusting worm gear drivingly connected to the worm gear surface is mounted in the pulley seat, an annular groove is provided on the adjusting worm gear, a plurality of concave points arranged circumferentially are provided at the bottom of the annular groove, an anti-loosening screw is mounted in the pulley seat, a convex point is provided at the end of the anti-loosening screw corresponding to the concave point, and the convex point is inserted in the concave point.

[0006] The interior of the anti-loosening screw is a cavity, and a round hole is provided at one end of the anti-loosening screw close to the adjusting worm. A marble that is reset by a spring is installed in the cavity, and the part of the marble that is exposed through the round hole is the convex point.

[0007] The diameter of the circular hole is smaller than the diameter of the marble.

[0008] The pulley seat is provided with an installation channel communicated with the installation cavity, and the adjusting worm is rotatably installed in the installation channel.

[0009] An internal threaded hole communicating with the installation channel is arranged in the pulley seat, and the anti-loosening screw is threadedly installed in the internal threaded hole.

[0010] The pulley block also includes a fixed hanger installed on the top of the sliding door, and a rotating screw is arranged on the fixed hanger, and the rotating screw is threadedly connected with the adjusting nut.

[0011] A thrust ball bearing is installed between the bottom of the adjusting nut and the bottom of the installation cavity.

[0012] The beneficial effects of the utility model are as follows: an installation cavity with an opening upward is provided on the pulley seat, a rotatable adjusting nut is installed in the installation cavity, a worm wheel surface is provided on the top surface of the adjusting nut, an adjusting worm connected to the worm wheel surface for transmission is installed in the pulley seat, an annular groove is provided on the adjusting worm, a plurality of concave points arranged along the circumferential direction are provided at the groove bottom of the annular groove, an anti-loosening screw is installed in the pulley seat, a convex point is provided at the end of the anti-loosening screw corresponding to the concave point, and the convex point is inserted in the concave point. On the one hand, the convex point can limit the sliding of the adjusting worm along the axial centerline direction, so as to prevent the adjusting worm from separating from the worm wheel surface, resulting in transmission failure. On the other hand, the convex point and the concave point cooperate with each other, which can effectively prevent the adjusting worm from rotating by itself, thereby causing the height of the sliding door to change. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 It is an exploded view of the utility model;

[0016] Figure 3 It is a cross-sectional view of the utility model;

[0017] Figure 4 It is a partial cross-sectional view of the pulley seat;

[0018] Figure 5 It is a structural schematic diagram of a locking screw;

[0019] Figure 6 It is a structural diagram of the adjusting worm. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0021] It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention.

[0022] Some embodiments of the present invention are described below in conjunction with the accompanying drawings.

[0023] Reference Figure 1-6 , an anti-loosening pulley block comprises a pulley seat 1, a plurality of pulleys 2 are installed on the pulley seat 1, the pulley seat 1 is provided with a mounting cavity 3 with an opening upward, a rotatable adjusting nut 4 is installed in the mounting cavity 3, the top surface of the adjusting nut 4 is provided with a worm wheel surface 5, an adjusting worm 6 connected to the worm wheel surface 5 for transmission is installed in the pulley seat 1, an annular groove 7 is provided on the adjusting worm 6, a plurality of concave points 8 are arranged along the circumferential direction at the bottom of the annular groove 7, an anti-loosening screw 9 is installed in the pulley seat 1, and a convex point 10 is provided at the end of the anti-loosening screw 9 corresponding to the concave point 8, and the convex point 10 is inserted in the concave point 8. On the one hand, the convex point can limit the sliding of the adjusting worm along the axial centerline direction, so as to prevent the adjusting worm from separating from the worm wheel surface, resulting in transmission failure. On the other hand, the convex point and the concave point cooperate with each other, which can effectively prevent the adjusting worm from rotating by itself, thereby causing the height of the sliding door to change.

[0024] The interior of the anti-loosening screw 9 is a cavity 11, and a circular hole is provided at one end of the anti-loosening screw 9 close to the adjusting worm 6. A marble 13 reset by a spring 12 is installed in the cavity 11, and the part of the marble 13 exposed through the circular hole is the convex point 10.

[0025] The diameter of the circular hole is smaller than the diameter of the marble 13 , which can prevent the marble 13 from falling out of the cavity 11 .

[0026] The end of the anti-loosening screw 9 away from the circular hole is an opening portion, and the marble 13 and the spring 12 are placed into the cavity 11 from the opening portion. After the marble 13 and the spring 12 are placed, a screwing portion 19 is embedded in the opening portion, and the screwing portion 19 is provided with a groove on the outside side for use with a screwing tool. For example, when the screwing tool is a cross screwdriver, the groove is a cross-shaped groove.

[0027] The opening portion may be non-circular, such as hexagonal, and the shape of the screwing portion is similar thereto. When the screwing portion is embedded in the opening portion, the anti-loosening screw 9 can be rotated synchronously by rotating the screwing portion.

[0028] The screwing portion and the opening portion can be fixed by conventional means such as welding and interference fit.

[0029] The pulley seat 1 is provided with a mounting channel 14 communicating with the mounting cavity 3 , and the adjusting worm 7 is rotatably mounted in the mounting channel 14 .

[0030] The pulley seat 1 is provided with an internal threaded hole 15 communicating with the installation channel 14 , and the anti-loosening screw 9 is threadedly installed in the internal threaded hole 15 .

[0031] The pulley block further comprises a fixing hanger 16 mounted on the top of the sliding door, and a rotating screw 17 is arranged on the fixing hanger 16 , and the rotating screw 17 is threadedly connected with the adjusting nut 4 .

[0032] A thrust ball bearing 18 is installed between the bottom of the adjusting nut 4 and the bottom of the mounting cavity 3, thereby effectively reducing the friction between the adjusting nut and the bottom of the mounting cavity, and can greatly reduce the force required for adjustment, thereby solving the problem of missing teeth and slipping between the adjusting worm and the worm wheel surface.

[0033] In the present invention, the term "plurality" means two or more than two, unless otherwise clearly defined. The term "and / or" used herein includes any and all combinations of one or more related listed items. The terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connect" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0034] It should be noted that when an element is referred to as being "assembled on", "installed on", "fixed on" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0035] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A pulley block for preventing loosening, comprising a pulley seat (1), on which a plurality of pulleys (2) are mounted, characterized in that The pulley seat (1) is provided with a mounting cavity (3) opening upward, a rotatable adjusting nut (4) is mounted in the mounting cavity (3), a worm wheel surface (5) is provided on the top surface of the adjusting nut (4), an adjusting worm (6) drivingly connected to the worm wheel surface (5) is mounted in the pulley seat (1), an annular groove (7) is provided on the adjusting worm (6), a groove bottom of the annular groove (7) is provided with a plurality of concave points (8) arranged along the circumferential direction, a locking screw (9) is mounted in the pulley seat (1), a convex point (10) is provided at the end of the locking screw (9) corresponding to the concave point (8), and the convex point (10) is inserted into the concave point (8).

2. The anti-loosening pulley block according to claim 1, characterized in that The interior of the anti-loosening screw (9) is a cavity (11), and a circular hole is provided at one end of the anti-loosening screw (9) close to the adjusting worm (6). A marble (13) is installed in the cavity (11) and is reset by a spring (12). The part of the marble (13) exposed through the circular hole is the convex point (10).

3. The anti-loosening pulley block according to claim 2, characterized in that The diameter of the circular hole is smaller than the diameter of the marble (13).

4. The anti-loosening pulley block according to claim 1, characterized in that The pulley seat (1) is provided with a mounting channel (14) which is in communication with the mounting cavity (3), and the adjusting worm (6) is rotatably mounted in the mounting channel (14).

5. The anti-loosening pulley block according to claim 4, characterized in that An internal threaded hole (15) communicating with the mounting channel (14) is provided in the pulley seat (1), and the anti-loosening screw (9) is threadably mounted in the internal threaded hole (15).

6. The anti-loosening pulley block according to claim 1, characterized in that: The pulley block further comprises a fixed hanger (16) mounted on the top of the sliding door, wherein a rotating screw (17) is provided on the fixed hanger (16), and the rotating screw (17) is threadedly connected to the adjusting nut (4).

7. The anti-loosening pulley block according to claim 1, characterized in that A thrust ball bearing (18) is installed between the bottom of the adjusting nut (4) and the bottom of the installation cavity (3).

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