Anti-loose inner hexagonal countersunk head screw

Abstract

The utility model discloses an anti-loose inner hexagonal countersunk head screw which comprises a screw rod and a screw cap, the screw rod is in threaded connection with the screw cap, a plurality of through grooves are formed in the screw rod, a plurality of inserting blocks are rotationally connected in the through grooves, a plurality of V-shaped elastic pieces are installed in the through grooves, the output ends of the V-shaped elastic pieces are connected with one ends of the inserting blocks, and a sliding plate is connected in the through grooves in a sliding mode. A plurality of extrusion plates are installed on the sliding plate and correspond to the insertion blocks one to one, and the sliding plate is rotationally connected to the nut. The screw cap is in threaded connection with the top end of the screw rod, and after the screw rod is screwed into the mounting hole and the screw cap is in contact with the mounting surface, the extrusion plate on the sliding plate is driven to ascend, so that pressure is generated on the insertion block to rotate the insertion block, the rotated insertion block can abut against the inner wall of the mounting hole, and when the vibration screw rod is about to fall off, the insertion block can increase the abutting force with the mounting hole; therefore, loosening and falling are prevented; and the inserting block is extruded through the V-shaped elastic piece, so that the abutting friction force between the inserting block and the mounting hole can be improved when the screw is subjected to any vibration.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-loosening hexagon socket countersunk screws, in particular to an anti-loosening hexagon socket countersunk screw. Background Art

[0002] The hexagon socket countersunk screw is a type of hexagon socket screw. The screw head is round on the outside and has a recessed hexagon in the middle. Screw devices are more common in the prior art. This anti-loosening device is set for external angle nuts, but hexagon socket screws are generally used in compact spaces.

[0003] The anti-loosening hexagon socket countersunk screws in the prior art generally have a complex structure, and in some harsh environments, such as under impact or vibration, the anti-loosening effect is also poor, and it is not convenient to use. Therefore, it is necessary to design an anti-loosening hexagon socket countersunk screw. Utility Model Content

[0004] Based on this, it is necessary to provide a kind of anti-loosening hexagon socket countersunk screw to solve the above technical problems.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a kind of anti-loosening hexagon socket countersunk screw, including a screw rod and a nut, the screw rod is threadedly connected with the nut, a plurality of through grooves are provided on the screw rod, a plurality of plug blocks are rotatably connected in the through grooves, a plurality of V-shaped spring pieces are installed in the through grooves, the output end of the V-shaped spring piece is connected to one end of the plug block, a slide plate is slidably connected in the through groove, a plurality of extrusion plates are installed on the slide plate, the extrusion plates correspond to the plug blocks one by one, and the slide plate is rotatably connected to the nut.

[0006] Preferably, a plurality of mounting blocks are installed in the through slot, the mounting blocks are located on both sides of the slide plate, and the V-shaped spring pieces are installed on the mounting blocks.

[0007] Preferably, an annular groove is provided in the nut, and a clamping block is installed on the top of the slide plate, and the clamping block is slidably clamped in the annular groove.

[0008] Preferably, a rough wear-resistant layer is provided at the bottom of the nut.

[0009] Preferably, one end of the insert block close to the screw rod is rounded.

[0010] Preferably, one end of the insert away from the screw rod is chamfered.

[0011] Compared with the prior art, this technical solution has at least one of the following beneficial effects:

[0012] Through the threaded connection between the nut and the top of the screw, after the screw is screwed into the mounting hole, the nut contacts the mounting surface, driving the extrusion plate on the slide plate to rise, thereby generating pressure on the plug block to rotate it, and the rotated plug block can abut against the inner wall of the mounting hole, so that when the vibration screw is about to fall off, the plug block can increase the abutment force with the mounting hole, thereby preventing it from loosening or falling off;

[0013] The insert block is squeezed by the V-shaped spring piece, so that when the screw is subjected to any vibration, the abutment friction force between the insert block and the mounting hole can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front cross-sectional view of an embodiment of the utility model;

[0015] Figure 2 For an embodiment of the utility model Figure 1 Enlarged view of point A in the middle;

[0016] Figure 3 A three-dimensional diagram of an embodiment of the utility model;

[0017] Figure 4 For an embodiment of the utility model Figure 3 Enlarged view of point B in the middle;

[0018] In the figure, 1, screw; 2, nut; 3, through groove; 4, plug block; 5, V-shaped spring piece; 6, slide plate; 7, extrusion plate; 8, mounting block; 9, annular groove; 10, clamping block; 11, rough wear-resistant layer. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0020] See also Figures 1 to 4 The embodiment of the present application provides a kind of anti-loosening hexagon socket countersunk screw, including a screw rod 1 and a nut 2, the screw rod 1 is threadedly connected with the nut 2, a plurality of through grooves 3 are provided on the screw rod 1, a plurality of plug blocks 4 are rotatably connected in the through grooves 3, a plurality of V-shaped spring pieces 5 are installed in the through grooves 3, the output end of the V-shaped spring piece 5 is connected to one end of the plug block 4, a slide plate 6 is slidably connected in the through groove 3, a plurality of extrusion plates 7 are installed on the slide plate 6, the extrusion plates 7 correspond to the plug blocks 4 one by one, and the slide plate 6 is rotatably connected to the nut 2.

[0021] In this embodiment, before installation, the top of the nut 2 needs to be threadedly connected with the screw rod 1, so that during installation, after the screw rod 1 penetrates into the installation hole, the bottom of the nut 2 abuts against the installation surface, and the position of the threaded connection between the nut 2 and the screw rod 1 changes from the top of the nut 2 to the bottom, so that the nut 2 can rise relative to the screw rod 1, and finally the nut 2 can drive the extrusion plate 7 on the slide plate 6 to move upward; when the screw rod 1 is installed, the descending plug block 4 will change to the same vertical state as the screw rod 1 after being subjected to the friction force of the installation hole. When the nut 2 drives the slide plate 6 to rise, the extrusion plate 7 generates pressure on the bottom end of the plug block 4, so that the plug block 4 rotates in a direction perpendicular to the screw rod 1, so as to After the installation is completed, the plug block 4 abuts against the inner wall of the installation hole. After the abutment, the V-shaped spring piece still generates pressure on the plug block 4, so that when the screw vibrates and falls off, a number of plug blocks 4 form a barb-like structure on the screw rod 1, thereby achieving the purpose of preventing loosening and falling off; the bottom end of the nut 2 is not threadedly connected with the screw rod 1, so that after the nut 2 rises, the nut 2 and the screw rod 1 return to the shape of the hexagon socket countersunk screw in the prior art; the installation tool of the prior art will idle after tightening the screw, so it will not damage the screw rod 1 and the nut 2; in order to prevent the V-shaped spring piece from separating easily when the plug block 4 rotates, the rotation center of the plug block 4 should be set to abut against the bottom of the V-shaped spring piece.

[0022] In some embodiments, in order to facilitate the connection between the output end of the V-shaped spring piece 5 and the plug block 4 and to stabilize the force on the plug block 4, a plurality of mounting blocks 8 are installed in the through slot 3. The mounting blocks 8 are located on both sides of the slide plate 6, and the V-shaped spring piece 5 is installed on the mounting blocks 8.

[0023] In some embodiments, in order to facilitate the rotational connection between the slide plate 6 and the thread 2 , an annular groove 9 is provided in the nut 2 , and a clamping block 10 is installed on the top of the slide plate 6 , and the clamping block 10 is slidably clamped in the annular groove 9 .

[0024] In some embodiments, in order to protect the bottom of the nut 2 , a rough wear-resistant layer 11 is provided on the bottom of the nut 2 .

[0025] In some embodiments, in order to reduce the friction between the insert block 4 and the extrusion plate 7 when the insert block 4 rotates, one end of the insert block 4 close to the screw rod 1 is provided with a rounded corner.

[0026] In some embodiments, in order to further improve the friction effect between the insert block 4 and the inner wall of the mounting hole, the end of the insert block 4 away from the screw rod 1 is chamfered.

[0027] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0028] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A hexagon socket countersunk screw for preventing loosening, comprising a screw rod (1) and a nut (2), characterized in that: The screw rod (1) is threadedly connected to the nut (2). The screw rod (1) is provided with a plurality of through grooves (3). A plurality of plug blocks (4) are rotatably connected in the through grooves (3). A plurality of V-shaped spring pieces (5) are installed in the through grooves (3). The output end of the V-shaped spring piece (5) is connected to one end of the plug block (4). A slide plate (6) is slidably connected in the through grooves (3). A plurality of extrusion plates (7) are installed on the slide plate (6). The extrusion plates (7) correspond to the plug blocks (4) one by one. The slide plate (6) is rotatably connected to the nut (2).

2. The anti-loosening hexagon socket countersunk screw according to claim 1, characterized in that: A plurality of mounting blocks (8) are installed in the through groove (3), the mounting blocks (8) are located on both sides of the slide plate (6), and the V-shaped spring pieces (5) are installed on the mounting blocks (8).

3. The anti-loosening hexagon socket countersunk screw according to claim 1, characterized in that: An annular groove (9) is provided in the nut (2), and a clamping block (10) is installed on the top of the slide plate (6). The clamping block (10) is slidably clamped in the annular groove (9).

4. The anti-loosening hexagon socket countersunk screw according to claim 1, characterized in that: The bottom of the nut (2) is provided with a rough wear-resistant layer (11).

5. The anti-loosening hexagon socket countersunk screw according to claim 1, characterized in that: One end of the insert block (4) close to the screw rod (1) is rounded.

6. The anti-loosening hexagon socket countersunk screw according to claim 1, characterized in that: One end of the insert block (4) away from the screw rod (1) is chamfered.

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