CN219795818U - Anti-disassembly locking screw - Google Patents

Abstract

The utility model discloses an anti-disassembly locking screw, which relates to the field of fasteners and has the technical scheme that: including screw head and fixed connection at the overhead screw rod of screw, screw head and the coaxial setting of screw, the screw head is close to the one end of screw rod, and is located the week side of screw rod and be provided with a plurality of locking arch, the one end that the screw head kept away from the screw rod is provided with the cylindricality recess, be provided with the operation portion on the screw head between the bottom and the lateral wall of cylindricality recess, the operation portion sets up to a plurality of, a plurality of the operation portion sets up along the circumference annular array of cylindricality recess, be provided with the atress face that is used for the screw to screw and the non-atress face that is used for preventing the screw unscrewing on the operation portion, the atress face is the slope plane, the non-atress face is the streamline profile. The utility model has better anti-disassembly and anti-loosening capabilities.

Description

Anti-disassembly locking screw

Technical Field

The utility model relates to the field of fasteners, in particular to an anti-disassembly locking screw.

Background

In the fields of machining, vehicle manufacturing, and the like, screws play a very important role as fixing members. However, the screw is easily loosened due to long-time vibration or other reasons, resulting in the occurrence of equipment malfunction and safety accidents. In order to solve the problem, various anti-loosening and anti-dismantling screws are developed, for example, chinese patent with publication number of CN202158064U discloses an anti-dismantling screw, and the technical scheme is as follows: the novel screw comprises a threaded part and a screw head, wherein a groove is formed in the middle of the screw head, and protrusions are symmetrically arranged at the bottom of the groove.

The mode has a certain anti-disassembly effect, but a straight-line-shaped groove is actually formed between two bulges of the anti-disassembly screw, the anti-disassembly screw can be disassembled through a straight-line-shaped screw driver, the anti-disassembly effect is still not ideal, the anti-disassembly screw does not have anti-loosening capability, and most of other existing anti-disassembly screws can be disassembled at the same time, so that the anti-disassembly effect is also not ideal.

There is therefore a need to propose a new solution to this problem.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide an anti-disassembly anti-loose screw which has better anti-disassembly and anti-loose capabilities.

The technical aim of the utility model is realized by the following technical scheme: the utility model provides an anti-disassembly locking screw, includes screw head and fixed connection at the overhead screw rod of screw, screw head and the coaxial setting of screw rod, the screw head is close to the one end of screw rod, and is located the week side of screw rod and be provided with a plurality of locking arch, the screw head is kept away from the one end of screw rod and is provided with the cylindricality recess, be provided with the operation portion between the bottom and the lateral wall of cylindricality recess on the screw head, the operation portion sets up to a plurality of, a plurality of the operation portion sets up along the circumference annular array of cylindricality recess, be provided with the atress face that is used for the screw to screw and be used for preventing the atress face that the screw unscrewed on the operation portion, the atress face is the inclined plane, the atress face is the streamline profile.

In one embodiment, a plurality of the locking protrusions are arranged along a circumferential annular array of the screw.

In one embodiment, the cross section of the anti-loosening protrusion is in a lux triangle structure, and the perpendicular bisector of the anti-loosening protrusion is perpendicular to the plane where the screw head is located.

In one embodiment, the screw head comprises a cylindrical pan head fixedly connected with the screw rod and a spherical arc-shaped protrusion fixedly connected to one end of the cylindrical pan head far away from the screw rod.

In one embodiment, the streamline profile comprises a first cambered surface and a second cambered surface, the first cambered surface and the second cambered surface are connected to form an S shape, and one side of the first cambered surface, which is far away from the second cambered surface, is tangent to the inner side wall of the cylindrical groove.

In summary, the utility model has the following beneficial effects: according to the utility model, through the arrangement of the operation part, the special spanner matched with the stress surface of the operation part can be used for screwing the screw, and when the special spanner is reversely rotated, no stress point exists between the spanner and the non-stress surface, so that the screw cannot be unscrewed or unscrewed, and other spanners are difficult to find the stress point on the non-stress surface with a streamline profile, so that the screw has good anti-disassembly and anti-theft capabilities, the use safety is enhanced, and meanwhile, through the arrangement of the anti-loosening protrusions, the friction force can be effectively increased, and the screw is prevented from loosening due to stress.

Drawings

FIG. 1 is a schematic view of a tamper-evident locking screw according to an embodiment of the present utility model;

fig. 2 is a schematic structural view of a locking protrusion in a tamper-proof locking screw according to an embodiment of the present utility model.

In the figure: 1. a screw head; 11. a spherical arc-shaped bulge; 111. a cylindrical recess; 12. a cylindrical pan head; 2. an operation unit; 21. a first cambered surface; 22. a second cambered surface; 23. an inclined plane; 3. a screw; 4. and the anti-loose bulges.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings.

As shown in fig. 1 and 2, an embodiment of the present utility model provides a tamper-proof lock screw including a screw head 1 and a screw shaft 3 fixedly coupled to the screw head 1, the screw head 1 being disposed coaxially with the screw shaft 3. The screw head 1 is close to one end of screw rod 3 and is located the week side of screw rod 3 and is provided with a plurality of locking protruding 4, the one end that screw head 1 kept away from screw rod 3 is provided with cylindricality recess 111, be provided with operating portion 2 between the bottom and the lateral wall that lie in cylindricality recess 111 on the screw head 1, operating portion 2 sets up to a plurality of, a plurality of operating portion 2 sets up along cylindricality recess 111's circumference annular array, be provided with the atress face that is used for the screw to screw and be used for preventing the atress face that the screw unscrewed on the operating portion 2, the atress face is inclined plane 23, the atress face is the streamline profile.

Through the arrangement of the operation part 2, a special spanner matched with the stress surface of the operation part 2 can be used for screwing the screw, and when the special spanner is reversely rotated, no stress point exists between the spanner and the non-stress surface, so that the screw cannot be unscrewed or unscrewed, and other spanners are difficult to find the stress point on the non-stress surface with a streamline profile, so that the screw has better anti-disassembly and anti-theft capabilities, the use safety is enhanced, and meanwhile, the friction force can be effectively increased through the arrangement of the anti-loosening protrusions 4, and the screw is prevented from loosening due to stress.

In this embodiment, a plurality of the locking protrusions 4 are arranged in a circumferential annular array along the screw 3.

By the arrangement, the contact area between the anti-loose protrusion 4 and the target workpiece can be enhanced, so that the friction force between the anti-loose protrusion and the target workpiece can be enhanced.

In this embodiment, the cross section of the anti-loosening protrusion 4 is in a lux triangle structure, and the perpendicular bisector of the anti-loosening protrusion 4 is perpendicular to the plane where the screw head 1 is located.

Through the arrangement, the Lorentz triangle structure has extremely strong compression resistance and tensile resistance, can keep the stability of the structure under the action of forces in different directions, is difficult to cause the damage of the anti-loosening bulge 4 when the screw is screwed, and reduces the problem of loosening prevention failure.

In this embodiment, the screw head 1 includes a cylindrical pan head 12 fixedly connected to the screw 3, and a spherical arc-shaped protrusion 11 fixedly connected to an end of the cylindrical pan head 12 away from the screw 3.

Through the above-mentioned setting, on the one hand, the ball arc protruding 11 can reduce because the crack and the fracture risk that local stress concentration led to, is favorable to improving the structural strength of screw head 1, and on the other hand, cylindricality coiled hair 12 and ball arc protruding 11 are all comparatively slick and sly, can't find the atress strong point on its surface to can prevent to dismantle the condition of screw from the outside of screw head 1, further strengthened the anti-disassembly ability of screw.

In this embodiment, the streamline profile includes a first cambered surface 21 and a second cambered surface 22, the first cambered surface 21 and the second cambered surface 22 are connected to form an S-shape, and a side of the first cambered surface 21 away from the second cambered surface 22 is tangent to the inner side wall of the cylindrical groove 111.

Through the arrangement, when the disassembling tool is used for unscrewing the screw, a stress point cannot be found, so that a good anti-disassembling effect can be achieved.

The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (5)

1. The utility model provides a prevent tearing open locking screw, includes screw head (1) and fixed connection screw rod (3) on screw head (1), screw head (1) and screw rod (3) coaxial setting, its characterized in that: the screw head (1) is close to one end of screw rod (3), and is located the week side of screw rod (3) and be provided with a plurality of locking arch (4), one end that screw rod (3) were kept away from to screw head (1) is provided with cylindricality recess (111), be provided with operation portion (2) between the bottom and the lateral wall that lie in cylindricality recess (111) on screw head (1), operation portion (2) set up to a plurality of, a plurality of operation portion (2) are along the circumference annular array setting of cylindricality recess (111), be provided with the atress face that is used for the screw to screw and be used for preventing the atress face that the screw unscrewed on operation portion (2), the atress face is inclined plane (23), the atress face is the streamline profile.

2. The tamper-evident locking screw of claim 1, wherein: the anti-loosening bulges (4) are arranged along the circumferential annular array of the screw (3).

3. The tamper-evident locking screw of claim 2, wherein: the cross section of the anti-loose bulge (4) is of a Lorenter triangle structure, and the perpendicular bisector of the anti-loose bulge (4) is perpendicular to the plane where the screw head (1) is located.

4. The tamper-evident locking screw of claim 1, wherein: the screw head (1) comprises a cylindrical pan head (12) fixedly connected with the screw rod (3) and a spherical arc-shaped bulge (11) fixedly connected with one end, far away from the screw rod (3), of the cylindrical pan head (12).

5. The tamper-evident locking screw of claim 1, wherein: the streamline profile comprises a first cambered surface (21) and a second cambered surface (22), wherein the first cambered surface (21) and the second cambered surface (22) are connected to form an S shape, and one side, far away from the second cambered surface (22), of the first cambered surface (21) is tangent to the inner side wall of the cylindrical groove (111).