Anti-falling screw

Abstract

The utility model relates to the technical field of screws, in particular to an anti-falling screw which comprises a screw head and a screw column, a connecting column is arranged at the bottom end of the screw head, the screw column is arranged at the bottom end of the connecting column, and a main glue injection channel which penetrates through the connecting column and extends into the screw column is formed in the screw head in the axial direction of the screw head. Adhesive grooves of a semicircular structure are evenly formed in the outer surface of the connecting column, first adhesive flowing channels communicating with the adhesive grooves are formed in the connecting column, adhesive flowing grooves are formed in the screw column and the threaded piece from top to bottom, and second adhesive flowing channels communicating with the adhesive flowing grooves are formed in the screw column. Glue outlets are symmetrically formed in the two sides of the bottom end of the screw column, third glue flowing channels communicated with the glue outlets are formed in the screw column, the fastening effect is good, and the phenomenon that the screw and a connected piece are loosened and disengaged is effectively prevented.

Description

Technical Field

[0001] The utility model belongs 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 an object's inclined surface and friction to gradually tighten objects and parts. When the part where the screw is connected vibrates due to external force, many small lateral slides will occur, causing the two connected parts to move relative to each other. These repetitive movements will offset the friction between the screw and the connected part in the long run, causing the screw to loosen, which in turn affects the tightening effect of the screw. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an anti-falling screw for the above-mentioned defects, which has good fastening effect and can effectively prevent the phenomenon of loosening and falling off from occurring.

[0004] The utility model adopts the following technical solution to solve its technical problems: an anti-falling screw, comprising a screw head and a screw column, a connecting column is arranged at the bottom end of the screw head, the screw column is arranged at the bottom end of the connecting column, the inside of the screw head is provided with a main glue injection channel that penetrates the connecting column along its axial direction and extends to the inside of the screw column, the outer surface of the connecting column is evenly provided with semicircular glue grooves, the inside of the connecting column is provided with a first glue flow channel connected with the glue groove, the screw column is provided with a glue flow groove on the threaded sheet from top to bottom, and the inside of the screw column is provided with a second glue flow channel connected with the glue flow groove.

[0005] Furthermore, glue outlets are symmetrically provided on both sides of the bottom end of the screw column, and a third glue flow channel connected to the glue outlet is provided inside the screw column.

[0006] Furthermore, a first rotating groove which is located on the same central axis as the main glue injection channel is formed at the top of the screw head.

[0007] Furthermore, a blocking cover is detachably connected to the inlet of the main injection channel, a sealing plug is provided at the bottom end of the blocking cover, a first receiving groove is provided on the outer surface of the sealing plug, a first sealing ring is provided inside the first receiving groove, a second receiving groove is provided below the first receiving groove, and a second sealing ring is provided inside the second receiving groove.

[0008] Furthermore, a second rotating groove is formed at the top of the blocking cover.

[0009] Furthermore, the first glue flow channel, the second glue flow channel, and the third glue flow channel are all located away from the main glue injection channel and are gradually inclined downward.

[0010] The beneficial effects of the utility model are:

[0011] The utility model cooperates with the connection column, the main glue injection channel, the glue groove, the first glue flow channel, the glue flow groove, and the second glue flow channel. After the screw and the connected part are fixed, glue is injected into the main glue flow channel, and the glue flows from the second glue flow channel to the glue flow groove of the threaded sheet of the screw column, so that it is bonded to the inner wall of the connection hole of the connected part, and the glue flows from the first glue flow channel to the glue groove, so that the connection column and the inner wall of the connection hole of the connected part are also bonded, thereby achieving a better fastening effect between the screw and the connected part, not easy to loosen, effectively preventing the screw from falling off, and making the fastening effect of the screw more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] 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.

[0013] Figure 1 It is a front cross-sectional view of the utility model.

[0014] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of .

[0015] Figure 3 for Figure 1 Enlarged schematic diagram of the structure at B.

[0016] Among them: 1. screw head; 101. first rotating groove; 2. screw column; 201. glue flow groove; 202. glue flow channel; 203. third glue flow channel; 3. connecting column; 301. first glue flow channel; 4. main glue injection channel; 5. glue groove; 6. glue outlet; 7. blocking cover; 701. second rotating groove; 8. sealing plug; 801. first accommodating groove; 802. first sealing ring; 803. second accommodating groove; 804. second sealing ring. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] Reference Figure 1-3As shown, the anti-dropping screw includes a screw head 1 and a screw column 2. A connecting column 3 is arranged at the bottom end of the screw head 1. The screw column 2 is arranged at the bottom end of the connecting column 3. The screw head 1, the screw column 2 and the connecting column 3 are integrally formed. A main glue injection channel 4 is opened along the axial direction of the screw head 1, which penetrates the connecting column 3 and extends to the inside of the screw column 2. Glue grooves 5 with a semicircular structure are evenly opened on the outer surface of the connecting column 3. A first glue flow channel 301 connected to the glue groove 5 is opened inside the connecting column 3. After the screw is fixedly connected to the connected part, glue is injected into the main glue injection channel 4 through a glue injection tool. The glue enters the first glue flow channel 301 from the main glue injection channel 4 and finally enters the glue groove 5, so that it forms a bond with the inner wall of the connecting hole of the connected part, thereby increasing the fastening performance between the screw and the connected part. , and make its fastening force more stable, the screw is not easy to loosen due to self-rotation due to external force, and a glue flow groove 201 is provided on the threaded sheet from top to bottom on the screw column 2. The glue flow groove 201 facilitates the glue to flow between the threaded sheet and the inner wall of the connecting hole of the connected part, so that the screw column 2 and the connected part are bonded. A second glue flow channel 202 connected to the glue flow groove 201 is provided inside the screw column 2. The glue flows from the main glue injection channel 4 into the second glue flow channel 202, and then flows into the second glue flow groove 201, so that the threaded sheet of the screw column 2 is bonded to the inner wall of the connecting hole of the connected part, and cooperates with the glue groove 5 to make the parts of the screw and the connecting hole of the connected part uniformly bonded, so as to increase the fastening performance of the screw and effectively prevent the screw from loosening and falling off due to external force.

[0019] Glue outlets 6 are symmetrically provided on both sides of the bottom end of the screw column 2, and a third glue flow channel 203 connected to the glue outlet is provided inside the screw column 2. The glue flows from the main glue injection channel 4 to the inside of the third glue flow channel 203, and is bonded to the inner wall of the connecting hole of the connected part from the glue outlet 6, further increasing the fastening performance between the screw and the connected part, allowing the bottom of the screw to form an effective bond with the connected part, further preventing it from falling off or loosening.

[0020] Preferably, a first rotating groove 101 which is on the same central axis as the main glue injection channel 4 is formed at the top of the screw head 1. The first rotating groove 101 can be in a straight line shape for the screw to form a connection with the connected part.

[0021] Preferably, a baffle 7 is detachably connected to the inlet of the main glue injection channel 4, and an external thread is provided on the outer surface of the baffle 7. An internal thread is provided on the inner wall of the opening of the main glue injection channel 4. A sealing plug 8 is provided at the bottom end of the baffle 7. A first accommodating groove 801 is provided on the outer surface of the sealing plug 8, and a first sealing ring 802 is provided inside the first accommodating groove 801. A second accommodating groove 803 is provided below the first accommodating groove 801, and a second sealing ring 804 is provided inside the second accommodating groove 803. The main glue injection channel 4 is protected by the cooperation of the baffle 7 with the first sealing ring 802 and the second sealing ring 804 to prevent foreign matter from entering the interior from the top of the main injection channel 4 before glue injection.

[0022] Preferably, a second rotating groove 701 is provided at the top of the blocking cover 7 , and the second rotating groove 701 may be cross-shaped for rotating the blocking cover 7 .

[0023] Preferably, the first glue flow channel 301, the second glue flow channel 202, and the third glue flow channel 203 are all oriented away from the main glue injection channel 4 and are gradually inclined downward. The inclined glue injection channel 4 facilitates the glue to flow to the glue flow groove 201, the glue groove 5, and the glue outlet 6.

[0024] 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 head (1) and a screw column (2), characterized in that: A connecting column (3) is arranged at the bottom end of the screw head (1), and the screw column (2) is arranged at the bottom end of the connecting column (3). A main glue injection channel (4) is opened inside the screw head (1) along its axial direction and penetrates the connecting column (3) and extends to the inside of the screw column (2). The outer surface of the connecting column (3) is evenly opened with glue grooves (5) in a semicircular structure. A first glue flow channel (301) connected to the glue groove (5) is opened inside the connecting column (3). A glue flow groove (201) is opened on the threaded sheet from top to bottom on the screw column (2), and a second glue flow channel (202) connected to the glue flow groove (201) is opened inside the screw column (2).

2. The anti-drop screw according to claim 1, characterized in that: Glue outlets (6) are symmetrically provided on both sides of the bottom end of the screw column (2), and a third glue flow channel (203) connected to the glue outlet is provided inside the screw column (2).

3. The anti-drop screw according to claim 1, characterized in that: The top end of the screw head (1) is provided with a first rotating groove (101) which is located on the same central axis as the main glue injection channel (4).

4. The anti-drop screw according to claim 1, characterized in that: A blocking cover (7) is detachably connected to the inlet of the main injection channel (4); a sealing plug (8) is provided at the bottom end of the blocking cover (7); a first receiving groove (801) is provided on the outer surface of the sealing plug (8); a first sealing ring (802) is provided inside the first receiving groove (801); a second receiving groove (803) is provided below the first receiving groove (801); a second sealing ring (804) is provided inside the second receiving groove (803).

5. The anti-drop screw according to claim 4, characterized in that: A second rotating groove (701) is formed at the top end of the blocking cover (7).

6. The anti-drop screw according to claim 2, characterized in that: The first glue flow channel (301), the second glue flow channel (202) and the third glue flow channel (203) are all located away from the main glue injection channel (4) from one side and are in a state of gradually tilting downward.

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