Anti-loosening fastening screw

Abstract

The utility model relates to the technical field of screws, in particular to an anti-loosening fastening screw which comprises a connected piece, a screw head and a stud, the stud is arranged at the bottom end of the screw head, a containing groove matched with the screw head is formed in the connecting piece, a connecting hole matched with the stud is formed in the containing groove, and the connecting piece is connected with the connecting hole. Limiting grooves with the cross section of a rectangular structure are symmetrically formed in the two sides of the containing groove, the two limiting grooves communicate with the containing groove, a fixing assembly is arranged on the screw head, limiting pieces matched with the limiting grooves are arranged on the fixing assembly, the limiting pieces are of a rectangular structure, and connecting assemblies for clamping the fixing assembly are arranged at the bottom ends of the limiting pieces. The connecting piece cannot loosen or fall off due to the influence of external force, so that the fastening performance between the two connecting pieces is more stable.

Description

Technical Field

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

[0002] Screws utilize the physical principles of the circular rotation of the inclined surface of an object and the friction force. They are tools for gradually fastening objects, enabling two connecting parts to be fastened. They are widely used in various fields and are indispensable fasteners. However, when existing screws are used, some fixed positions are affected by external forces for a long time, which can easily lead to thread backing of the screws, and then cause the fastening state of the screws to loosen and fall off, which will reduce the stability of the connection between the two connecting parts. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an anti-loosening fastening screw for the above-mentioned defects, which will not loosen or fall off due to the influence of external force, so that the fastening performance between the two connecting parts is more stable.

[0004] The utility model adopts the following technical solution to solve its technical problems: an anti-loosening fastening screw, comprising a connected member, a screw head and a stud, the stud being arranged at the bottom end of the screw head, the connecting member being provided with a receiving groove matching the screw head, the receiving groove being provided with a connecting hole matching the stud, limiting grooves with a rectangular cross-section being symmetrically arranged on both sides of the receiving groove, the two limiting grooves being connected to the receiving groove, a fixing component being arranged on the screw head, a limiting piece matching the limiting groove being arranged on the fixing component, the limiting piece being in a rectangular structure, and a fixing component being arranged at the bottom end of the limiting piece to form a snap-on connecting component.

[0005] Furthermore, the fixing assembly includes a left fixing member, a right fixing member, a buckle, and a first clamping block. The left fixing member and the right fixing member form a circular ring structure. The inner walls of the left fixing member and the right fixing member are in conflict with the outer surface of the screw head. The buckle is arranged at the connection between the right fixing member and the left fixing member, and the first clamping block is arranged at the connection between the left fixing member and the right fixing member. The first clamping block is inside the buckle, and a first driving inclined surface is provided on a side of the first clamping block close to the buckle.

[0006] Furthermore, an annular positioning portion is provided on the outer surface of the screw head, and positioning grooves matching the annular positioning portion are provided on the inner walls of the left fixing member and the right fixing member.

[0007] Furthermore, the inner walls of the left fixing member and the right fixing member are evenly provided with protrusions for clamping the outer surface of the screw head.

[0008] Furthermore, the connecting component includes a connecting arm, a second clamping block, a connecting groove, and a clamping hole. The connecting arm is symmetrically arranged at the bottom end of the limit member, the second clamping block is arranged at the bottom end of the outer side walls of the two connecting arms, a clamping groove is formed between the top end of the second clamping block and the side wall of the connecting arm, and a second driving inclined surface is arranged at the bottom end of the second clamping block away from the connecting arm. The connecting groove is symmetrically arranged on both sides of the top of the fixing component, the clamping hole is arranged on the side of the fixing component close to the accommodating groove, and the clamping hole is connected with the connecting groove. When the limit member and the fixing component are clamped, the connecting arm is located inside the connecting groove, and the second clamping block is engaged with the clamping hole.

[0009] Furthermore, a guide plate matching the accommodating groove is provided between the screw head and the stud.

[0010] Furthermore, a rotation groove is provided at the original center of the top end of the screw head.

[0011] The beneficial effects of the utility model are:

[0012] The utility model is provided through the matching arrangement of the accommodating groove, the connecting hole, the limiting groove, the limiting piece, the fixing assembly and the connecting assembly. After the screw and the connecting hole form a threaded connection, the fixing assembly is fixed on the screw head. The limiting piece is clamped with the fixing assembly through the connecting assembly, and the limiting piece is matched with the limiting groove. Since the limiting piece and the limiting groove are both rectangular structures, when the screw is rotated due to external force, it will be limited by the limiting piece and the limiting groove and cannot rotate, thereby limiting the axial thread withdrawal movement of the screw, so that the screw will not loosen and fall off due to the influence of external force, and the fastening performance between the two connecting parts is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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.

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

[0015] Figure 2 This is a top view of the limit groove of the utility model.

[0016] Figure 3 It is a schematic diagram of the top view structure of the fixing component of the utility model.

[0017] Figure 4 It is a schematic diagram of the connection structure between the buckle and the first clamping block of the utility model.

[0018] Wherein: 1. connected part; 101. accommodating groove; 102. connecting hole; 103. limiting groove; 2. screw head; 3. stud; 4. limiting part; 501. left fixing part; 502. right fixing part; 503. buckle; 504. first clamping block; 505. first driving inclined surface; 506. positioning groove; 507. protrusion; 601. connecting arm; 602. second clamping block; 603. connecting groove; 604. clamping hole; 605. clamping groove; 606. second driving inclined surface; 7. guide plate; 8. rotating groove. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings.

[0020] Reference Figure 1-4 As shown, the anti-loosening fastening screw comprises a connected member 1, a screw head 2 and a stud 3, the stud 3 is arranged at the bottom end of the screw head 2, a connecting member is arranged at the bottom end of the connecting member 1, a receiving groove 101 matching the screw head 2 is opened on the connecting member 1, a connecting hole 102 matching the stud 3 is opened inside the receiving groove 101, the connecting hole 102 is opened from the inside of the receiving groove 101 of the connected member 1 to the connecting member, and limiting grooves 103 with a rectangular cross-section are symmetrically arranged on both sides of the receiving groove 101, and the two limiting grooves are symmetrically arranged on the two sides of the receiving groove 101. The positioning groove 103 is connected with the accommodating groove 101, and a fixing assembly is arranged on the screw head 2, and the fixing assembly includes a left fixing member 501, a right fixing member 502, a buckle 503, and a first clamping block 504. The left fixing member 501 and the right fixing member 502 form a circular ring structure, and the inner walls of the left fixing member 501 and the right fixing member 502 are in conflict with the outer surface of the screw head 2. The buckle 503 is arranged at the connection between the right fixing member 502 and the left fixing member 501, and the first clamping block 504 is arranged at the connection between the left fixing member 501 and the right fixing member At the connection of the fixed member 502, the first clamping block 504 is inside the buckle 503, and a first driving inclined surface 505 is provided on the side of the first clamping block 504 close to the buckle 503. After the stud 3 is installed inside the connecting hole 102, the inner wall of the left fixing member 501 and the right fixing member 502 are fixed to the outer surface of the screw head 2, and the first clamping block 504 is clamped with the buckle 503, so that the left fixing member 501, the right fixing member 502 and the screw head 2 are fixed, and the first clamping block 504 of the left fixing member 501 is fixed to the screw head 2. When block 504 approaches the buckle of the right fixing member 502, the buckle 502 contacts the first driving inclined surface 505 and is pushed by the first driving inclined surface 505 to expand the buckle 502 outward, causing it to elastically deform until the first clamping block 504 corresponds to the bayonet of the buckle 503, and the squeezing force on the buckle 503 disappears, and the buckle 503 rebounds and resets, allowing the first clamping block 504 to enter the inside of the buckle 503, and the left fixing member 501 and the right fixing member 502 are clamped and fixed on the screw head 2.

[0021] An annular positioning portion 201 is provided on the outer surface of the screw head 2, and a positioning groove 506 matching the annular positioning portion is provided on the inner wall of the left fixing member 501 and the right fixing member 502. The positioning portion 201 cooperates with the positioning groove 506 to limit the axial movement of the fixing assembly.

[0022] The inner walls of the left fixing member 501 and the right fixing member 502 are evenly provided with protrusions 507 that clamp the outer surface of the screw head 2. The protrusions 507 are in conflict with the outer surface of the screw head 2, increasing the connection firmness between the fixing assembly and the screw head 2 and preventing the screw from rotating in the left fixing member 501 and the right fixing member 502.

[0023] A limit piece 4 matching the limit groove 103 is provided on the fixing component. The limit piece 4 is in a rectangular structure. The limit piece 4 and the limit groove 103 are in a rectangular structure. After the limit piece 4 is connected to the fixing component, it is located inside the limit groove 103. When the screw rotates due to external force, it is necessary to drive the limit piece 4 to rotate together. However, the limit piece 4 is restricted by the limit groove 103, which will limit the rotation of the limit piece 4 and the screw, so that the screw will not loosen and fall off due to the influence of external force, so that the fastening performance between the two connecting parts is more stable. A fixing component is provided at the bottom end of the limit piece 4 to form a card-connected connecting component.

[0024] The connecting assembly includes a connecting arm 601, a second clamping block 602, a connecting groove 603, and a clamping hole 604. The connecting arm 601 is symmetrically arranged at the bottom end of the limiting member 4. The second clamping block 602 is arranged at the bottom end of the outer wall of the two connecting arms 601. A clamping groove 605 is formed between the top of the second clamping block 602 and the side wall of the connecting arm 601. A second driving inclined surface 606 is arranged at the bottom end of the second clamping block 602 away from the connecting arm 601. The connecting groove 603 is symmetrically arranged on both sides of the top of the fixing assembly. The connecting groove 603 is arranged on the left fixing member 501 and the right fixing member 502. The clamping hole 604 is arranged on the side of the fixing assembly close to the accommodating groove 101, and the clamping hole 604 is connected with the connecting groove 603. The clamping hole 604 is arranged on the side wall of the left fixing member 501 and the right fixing member 502. When the limiting member 4 is clamped with the fixing assembly, the connecting The arm 601 is inside the connecting groove 603, and the second clamping block 602 is engaged with the clamping hole 604. After the fixing assembly is fixed to the screw head 2, the limiter 4 is matched with the limiter groove 103, and the connecting arm 601 is matched with the connecting groove 603. The second driving inclined surface 606 of the second clamping block 602 first conflicts with the inner wall of the opening of the clamping groove 605. The second clamping block 602 is squeezed by the inner wall of the connecting groove 603, so that the connecting arm 601 is elastically deformed, and the two connecting arms 601 are inclined and approached until the connecting arm 601 moves downward to correspond to the second clamping block 602 and the clamping hole 604. The squeezing force of the second clamping block 602 disappears, the connecting arm 601 rebounds, the second clamping block 602 is engaged with the clamping hole 604, and the clamping groove 605 is fitted with the inner wall at the clamping hole 604, thereby completing the fixed connection between the limiter 4 and the fixing assembly.

[0025] A guide plate 7 matching the accommodating groove 101 is provided between the screw head 2 and the stud 3. When the stud 3 is connected to the connecting hole 102, the guide plate 7 cooperates with the inner wall of the accommodating groove 101 to limit the moving direction of the stud 3 to prevent it from tilting and offsetting, so that the stud 3 and the connecting hole 102 can be accurately matched.

[0026] A rotating groove 8 is provided at the original center of the top of the screw head 2. The rotating groove 8 may be cross-shaped, and the screw is driven to rotate through the rotating groove 8.

[0027] 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-loosening fastening screw, comprising a connected part (1), a screw head (2) and a stud (3), wherein the stud (3) is arranged at the bottom end of the screw head (2), and is characterized in that: The connecting member (1) is provided with a receiving groove (101) matching with the screw head (2), a connecting hole (102) matching with the stud (3) is provided inside the receiving groove (101), limiting grooves (103) with a rectangular cross-section are symmetrically arranged on both sides of the receiving groove (101), and the two limiting grooves (103) are connected with the receiving groove (101), a fixing component is arranged on the screw head (2), and a limiting member (4) matching with the limiting groove (103) is arranged on the fixing component, the limiting member (4) has a rectangular structure, and a fixing component is arranged at the bottom end of the limiting member (4) to form a clamped connecting component.

2. The anti-loosening fastening screw according to claim 1, characterized in that: The fixing assembly comprises a left fixing member (501), a right fixing member (502), a buckle (503), and a first clamping block (504); the left fixing member (501) and the right fixing member (502) form a circular ring structure; the inner walls of the left fixing member (501) and the right fixing member (502) are in contact with the outer surface of the screw head (2); the buckle (503) is arranged at the connection between the right fixing member (502) and the left fixing member (501); the first clamping block (504) is arranged at the connection between the left fixing member (501) and the right fixing member (502); the first clamping block (504) is located inside the buckle (503); and a first driving inclined surface (505) is provided on a side of the first clamping block (504) close to the buckle (503).

3. The anti-loosening fastening screw according to claim 2, characterized in that: The outer surface of the screw head (2) is provided with an annular positioning portion (201), and the inner walls of the left fixing member (501) and the right fixing member (502) are provided with positioning grooves (506) matching the annular positioning portion.

4. The anti-loosening fastening screw according to claim 2, characterized in that: The inner walls of the left fixing member (501) and the right fixing member (502) are evenly provided with protrusions (507) for clamping the outer surface of the screw head (2).

5. The anti-loosening fastening screw according to claim 1, characterized in that: The connecting assembly comprises a connecting arm (601), a second clamping block (602), a connecting groove (603), and a clamping hole (604); the connecting arm (601) is symmetrically arranged at the bottom end of the limiting member (4); the second clamping block (602) is arranged at the bottom end of the outer side walls of the two connecting arms (601); a clamping groove (605) is formed between the top end of the second clamping block (602) and the side wall of the connecting arm (601); and the second clamping block (602) is disposed on a side away from the connecting arm (601). A second driving inclined surface (606) is provided at the bottom end of the fixing assembly, the connecting groove (603) is symmetrically arranged on both sides of the top of the fixing assembly, the clamping hole (604) is arranged on a side of the fixing assembly close to the accommodating groove (101), and the clamping hole (604) is connected to the connecting groove (603), and when the limiting member (4) is clamped with the fixing assembly, the connecting arm (601) is located inside the connecting groove (603), and the second clamping block (602) is clamped with the clamping hole (604).

6. The anti-loosening fastening screw according to claim 1, characterized in that: A guide plate (7) matching the accommodating groove (101) is arranged between the screw head (2) and the stud (3).

7. The anti-loosening fastening screw according to claim 1, characterized in that: A rotation groove (8) is provided at the original center of the top end of the screw head (2).

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