Anti-falling screw

Abstract

The utility model relates to the technical field of screws, in particular to an anti-falling screw. Comprising a screw column and a nut, a rotating groove for a screwdriver to work is formed in the upper portion of the screw column, a cylindrical through groove is formed in the bottom of the rotating groove, a first working rod is arranged in the through groove in a sliding mode, a connecting piece is arranged at the bottom of the first working rod, and a fastening device is arranged below the connecting piece. The fastening device is arranged, the fastening device comprises a second working rod, a third working rod, a sliding piece, a cushioning spring and a supporting piece, a spine is fixedly arranged at the end, away from the sliding piece, of the third working rod, and the spine can slidably penetrate through a hole formed in the outer wall, located in the supporting piece, of a screw column along with movement of the sliding piece. At the moment, along with tightening of the nut, the spikes can be gradually inserted into an object into which the screw is hit, a fastening structure is formed, the screw and a connecting piece can be tightly connected, the anti-falling effect is achieved, connection is firm and stable, the overall function is complete, and practicability is high.

Description

Technical Field

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

[0002] Screws are tools that use the physics and mathematical principles of the circular rotation of the inclined surface of an object and the friction force to gradually fasten objects and mechanical parts. Screws are a general term for fasteners. Screws are indispensable industrial necessities in daily life: such as very small screws used in cameras, glasses, clocks, electronics, etc.; general screws for televisions, electrical products, musical instruments, furniture, etc.; as for engineering, construction, and bridges, large screws and nuts are used; transportation equipment, airplanes, trams, cars, etc. use both large and small screws. Screws have important tasks in industry, and as long as there is industry on the earth, the function of screws will always be important.

[0003] The fixation of a screw is often only determined by its own thread, but many existing connection devices often have the phenomenon of screws falling off due to long-term operation in a vibration mode or frequent external force. Therefore, the utility model proposes a screw that prevents falling off. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a screw that prevents falling off in view of the above defects.

[0005] The utility model solves the technical problem by adopting the following technical solution: an anti-falling screw, comprising a screw column and a nut, a rotating groove for a screwdriver to work is arranged above the screw column, a cylindrical through groove is arranged at the bottom of the rotating groove, a first working rod is arranged to slide through the groove, a connecting piece is arranged at the bottom of the first working rod, and a fastening device is arranged below the connecting piece;

[0006] The fastening device includes a second working rod, a third working rod, a sliding member, a shock-absorbing spring and a support member. One end of the second working rod is hinged to the connecting member, the other end of the second working rod is hinged to the sliding member, the third working rod is horizontally fixedly arranged on a side of the sliding member away from the second working rod, the shock-absorbing spring is sleeved on the third working rod, the support member is fixedly arranged on the inner wall of the screw column, the support member and the sliding member are located on the same horizontal line, one end of the shock-absorbing spring is fixedly connected to the support member, a spike is fixedly arranged on the end of the third working rod away from the sliding member, and the screw column is located on the outer wall of the support member with a hole for the spike to pass through.

[0007] Furthermore, the nut is rotatably arranged on the screw column, the outer wall of the nut is fixedly provided with anti-skid grooves, and a push rod is vertically arranged at the inner center of the nut, and the push rod can be slidably inserted into the through groove.

[0008] Furthermore, a pressing plate surrounding the nut is arranged at the bottom end of the outer wall of the nut, and a waterproof gasket is arranged at the bottom end of the pressing plate. The waterproof gasket is made of polyurethane.

[0009] Furthermore, the bottom end of the push rod can contact the top end of the first working rod.

[0010] Furthermore, the outer wall of the screw column is fixedly provided with threaded lines, and the spikes are arranged between the gaps between adjacent threaded lines.

[0011] Furthermore, the fastening device includes two groups and the two groups are symmetrically arranged.

[0012] The beneficial effects of the utility model are:

[0013] The utility model is provided with a fastening device, which includes a second working rod, a third working rod, a sliding member, a shock absorbing spring and a supporting member. A spike is fixedly provided at one end of the third working rod away from the sliding member. The spike can slide through a hole provided on the outer wall of the supporting member with the movement of the sliding member. At this time, as the nut is tightened, the spike will gradually be inserted into the object into which the screw is driven, forming a fastening structure, so that the screw and the connecting member can be tightly connected to achieve the effect of preventing falling off, the connection is firm and stable, the overall function is perfect, and the practicality is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The foregoing and other objects, features and advantages of the present invention will become apparent from the following detailed description in conjunction with the accompanying drawings.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model when the spike is extended.

[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model when the spikes are not extended.

[0017] Figure 3 It is a top view of the utility model.

[0018] Figure 4 It is an enlarged schematic diagram of the structure at point A of the utility model.

[0019] Among them: 1 is a screw column, 2 is a nut, 3 is a rotating groove, 4 is a through groove, 5 is a first working rod, 6 is a connecting piece, 7 is a second working rod, 8 is a third working rod, 9 is a sliding piece, 10 is a shock-absorbing spring, 11 is a supporting piece, 12 is a spike, 13 is an anti-slip pattern, 14 is a pushing rod, 15 is a pressure plate, 16 is a waterproof gasket, and 17 is a threaded line. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings.

[0021] See also Figure 1-Figure 4 , an anti-dropping screw, comprising a screw column 1 and a nut 2, a rotating groove 3 for a screwdriver to work is arranged above the screw column 1, a cylindrical through groove 4 is opened at the bottom of the rotating groove 3, a first working rod 5 is slidably arranged in the through groove 4, a connecting piece 6 is arranged at the bottom of the first working rod 5, and a fastening device is arranged below the connecting piece 6;

[0022] The fastening device includes a second working rod 7, a third working rod 8, a sliding member 9, a shock-absorbing spring 10 and a support member 11. One end of the second working rod 7 is hinged to the connecting member 6, and the other end of the second working rod 7 is hinged to the sliding member 9. The third working rod 8 is horizontally fixed on a side of the sliding member 9 away from the second working rod 7. The shock-absorbing spring 10 is sleeved on the third working rod 8. The support member 11 is fixed on the inner wall of the screw column 1. The support member 11 and the sliding member 9 are located on the same horizontal line. One end of the shock-absorbing spring 10 is fixedly connected to the support member 11. A spike 12 is fixedly provided on the end of the third working rod 8 away from the sliding member 9. The outer wall of the screw column 1 located on the support member 11 is provided with a hole for the spike 12 to pass through.

[0023] Furthermore, the nut 2 is rotatably arranged on the screw column 1 , the outer wall of the nut 2 is fixedly provided with anti-slip grooves 13 , and a push rod 14 is vertically arranged at the inner center of the nut 2 , and the push rod 14 can be slidably inserted into the through slot 4 .

[0024] Furthermore, a pressing plate 15 surrounding the nut 2 is disposed at the bottom end of the outer wall of the nut 2 , and a waterproof gasket 16 is disposed at the bottom end of the pressing plate 15 . The waterproof gasket 16 is made of polyurethane.

[0025] Furthermore, the bottom end of the push rod 14 can contact the top end of the first working rod 5 .

[0026] Furthermore, the outer wall of the screw column 1 is fixedly provided with threads 17 , and the spikes 12 are arranged between the gaps between adjacent threads 17 .

[0027] Furthermore, the fastening device includes two groups and the two groups are symmetrically arranged.

[0028] In the embodiment of the present utility model, please refer to Figure 1-Figure 4In the process of installing the screw, the electric screwdriver is first aligned with the rotating groove 3. When the screw is driven into the object to be fixed, the nut 2 is rotated and installed on the screw column 1. Since a push rod 14 is vertically arranged at the inner center of the nut 2, the push rod 14 can push the first working rod 5 during the rotation of the nut 2. The connecting piece 6 at the bottom of the first working rod 5 continues to push the second working rod 7, and the second working rod 7 continues to push the sliding piece 9 to move along the third working rod 8. The end of the third working rod 8 away from the sliding piece 9 is fixedly provided with a spike 12. Since the end of the third working rod 8 away from the spike 12 is fixedly provided on the sliding piece 9, the spike 12 can slide through the hole provided on the outer wall of the screw column 1 located on the support piece 11 as the sliding piece 9 moves. At this time, as the nut 2 is tightened, the spike 12 will gradually be inserted into the object into which the screw is driven, forming a fastening structure, which can make the screw and the connecting piece 6 form a tight connection, achieving the effect of preventing falling off.

[0029] See also Figure 1-Figure 4 A pressing plate 15 surrounding the nut 2 is arranged at the bottom of the outer wall of the nut 2, and a waterproof gasket 16 is arranged at the bottom of the pressing plate 15. The waterproof gasket 16 is made of polyurethane material, which can prevent water stains from entering the hole where the screw is driven, avoid corrosion and rust, and avoid friction damage.

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0032] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. An anti-drop screw, comprising a screw column (1) and a nut (2), characterized in that: A rotating groove (3) for a screwdriver to work is arranged above the screw column (1), a cylindrical through groove (4) is arranged at the bottom of the rotating groove (3), a first working rod (5) is slidably arranged in the through groove (4), a connecting piece (6) is arranged at the bottom of the first working rod (5), and a fastening device is arranged below the connecting piece (6); The fastening device comprises a second working rod (7), a third working rod (8), a sliding member (9), a shock absorbing spring (10) and a supporting member (11), one end of the second working rod (7) is hinged to the connecting member (6), the other end of the second working rod (7) is hinged to the sliding member (9), the third working rod (8) is horizontally fixedly arranged on a side of the sliding member (9) away from the second working rod (7), the shock absorbing spring (10) is sleeved on the third working rod (8), the supporting member (11) is fixedly arranged on the inner wall of the screw column (1), the supporting member (11) and the sliding member (9) are located on the same horizontal line, one end of the shock absorbing spring (10) is fixedly connected to the supporting member (11), the end of the third working rod (8) away from the sliding member (9) is fixedly provided with a spike (12), and the outer wall of the screw column (1) located on the supporting member (11) is provided with a hole for the spike (12) to pass through.

2. The anti-falling screw according to claim 1, characterized in that: The nut (2) is rotatably mounted on the screw column (1); an anti-slip pattern (13) is fixedly mounted on the outer wall of the nut (2); a push rod (14) is vertically mounted at the inner center of the nut (2); and the push rod (14) can be slidably inserted into the through slot (4).

3. The anti-falling screw according to claim 2, characterized in that: A pressing plate (15) surrounding the nut (2) is arranged at the bottom end of the outer wall of the nut (2), and a waterproof gasket (16) is arranged at the bottom end of the pressing plate. The waterproof gasket (16) is made of polyurethane.

4. The anti-falling screw according to claim 2, characterized in that: The bottom end of the pushing rod (14) can contact the top end of the first working rod (5).

5. The anti-falling screw according to claim 1, characterized in that: The outer wall of the screw column (1) is fixedly provided with a thread line (17), and the spike (12) is arranged between the gaps between adjacent thread lines (17).

6. The anti-falling screw according to claim 1, characterized in that: The fastening device comprises two groups and the two groups are symmetrically arranged.

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