A hexalobular screw

Abstract

The utility model discloses a hexagonal groove screw, including a screw body, one end of the screw body is provided with a slotted end, a hexagonal groove is provided at the center of the slotted end, a concave curved groove is provided at the end face of the slotted end, an inner chamfer is provided at the outer edge of the hexagonal groove, an arc-shaped curved bottom is provided on the inner side of the hexagonal groove, a center groove is provided at the center of the arc-shaped curved bottom of the screw body, an adhesive layer is provided at the innermost side of the center groove, and a strong magnet is fixedly connected to the inside of the center groove through the adhesive layer. The slotted end of the screw body of the utility model is provided with a concave curved groove, which, in conjunction with the inner chamfer of the hexagonal groove, can reduce the difficulty of aligning a hexagonal head wrench with the hexagonal groove, and in conjunction with the strong magnet inside the hexagonal groove, the hexagonal head wrench can be directly adsorbed into the hexagonal groove when it is aligned with the hexagonal groove, and continuous magnetic adsorption can avoid loosening due to a large gap.

Description

Technical Field

[0001] The utility model relates to the technical field of hardware, in particular to a hexalobular groove screw. Background Art

[0002] The official name of the plum screw is ISO10664 screw or internal plum screw, also known as star screw. The plum design has a contact angle closer to 90 degrees than the hexagonal head, so the potential destructive radial force is much smaller under the same torque. This feature allows the screw head to be made smaller under the same torque, with the advantage of reduced space. It is used in common automobile, motorcycle, bicycle brake systems, hard drives, computer systems and consumer electronics.

[0003] The utility model patent with application number CN201621092533.8 discloses a hexagon socket screw, comprising a screw with an external thread, the screw having a plurality of pressure grooves evenly arranged in a circumferential direction, the length direction of the pressure groove being consistent with the length direction of the screw, a conical screw head being provided at one end of the screw, the external thread on the screw extending to the screw head, a knife-retracting groove, a limit platform and a screw cap being provided at the other end of the screw in sequence, the outer end surface of the screw cap being provided with a hexagon socket extending inwardly and coaxial with the screw, the outer diameters of the knife-retracting groove, the limit platform and the screw cap increasing in sequence; after the new screw is tightened, a variety of measures can be taken based on the pressure groove to prevent loosening, but the hexagon socket provided in the existing screw is difficult to be inserted into the hexagon socket using a hexagon socket wrench due to its hexagon socket design, and is easy to misalign, and due to tolerance reasons, either the hexagon socket and the hexagon socket are tightly clamped and not easy to be inserted and pulled out, or the gap is large and easy to loosen, and there is further room for improvement. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art and provides a hexalobular groove screw to solve the above problem.

[0005] In order to achieve the above-mentioned purpose, a hexagonal groove screw is provided, including a screw body, a slotted end head is provided at one end of the screw body, a hexagonal groove is provided at the center of the slotted end head, an inwardly concave curved groove is provided at the end face of the slotted end head, an inner chamfer is provided at the outer edge of the hexagonal groove, an arc-shaped curved bottom is provided on the inner side of the hexagonal groove, a center groove is provided at the center of the arc-shaped curved bottom of the screw body, an adhesive layer is provided on the innermost side of the center groove, and a strong magnet is fixedly connected to the inside of the center groove through the adhesive layer.

[0006] According to the hexalobular screw, one end of the strong magnet close to the adhesive layer is embedded in the interior of the central groove.

[0007] According to the hexagram groove screw, a chamfer is formed at one end of the screw body away from the groove end.

[0008] According to the hexalobular screw, the adhesive layer becomes an elastomer after curing.

[0009] The above solution has at least one of the following beneficial effects:

[0010] 1. The slotted end of the screw body of the utility model is provided with an inner concave curved groove, which, together with the inner chamfer of the plum blossom notch, can reduce the difficulty of aligning the plum blossom head wrench with the plum blossom notch. Together with the strong magnet inside the plum blossom notch, the plum blossom head wrench can be directly adsorbed into the plum blossom notch when it is aligned with the plum blossom notch, and continuous magnetic adsorption can avoid the situation of loosening due to a large gap, thereby enhancing the practicality of the device.

[0011] 2. The adhesive layer provided in the utility model can not only adhere and fix the strong magnet, but also use its own elasticity to buffer the impact of the strong magnet when the back of the plum head wrench is sucked into the plum blossom notch, thereby preventing the hard and brittle strong magnet from being damaged by the impact, thereby enhancing the practicality of the device.

[0012] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0014] Figure 1 It is a three-dimensional structural schematic diagram of a hexalobular groove screw of the utility model;

[0015] Figure 2 It is a top view of a hexalobular groove screw of the utility model;

[0016] Figure 3 For this utility model Figure 2 Schematic diagram of the cross-sectional structure in the AA direction;

[0017] Legend:

[0018] 1. Screw body; 2. Slotted end; 3. Plum blossom notch; 4. Concave curved groove; 5. Inner chamfer; 6. Arc curved bottom; 7. Center groove; 8. Adhesive layer; 9. Strong magnet. DETAILED DESCRIPTION

[0019] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0020] Reference Figure 1-3 The utility model provides a hexagram groove screw, including a screw body 1, one end of the screw body 1 is provided with a slotted end 2, the end of the screw body 1 away from the slotted end 2 is provided with a chamfer, a hexagram groove 3 is provided at the center of the slotted end 2, an inner concave curved groove 4 is provided at the end surface of the slotted end 2, an inner chamfer 5 is provided at the outer edge of the hexagram groove 3, an arc-shaped curved bottom 6 is provided on the inner side of the hexagram groove 3, and the screw body 1 is provided with a curved curved bottom 6 at the center of the curved curved bottom 6 A central groove 7 is provided at the innermost side of the central groove 7, and a strong magnet 9 is fixedly connected to the interior of the central groove 7 through the adhesive layer 8. The slotted end 2 of the screw body 1 is provided with an inner concave curved groove 4, which, in conjunction with the inner chamfer 5 of the plum blossom notch 3, can reduce the difficulty of aligning the plum blossom wrench with the plum blossom notch 3. In conjunction with the strong magnet inside the plum blossom notch 3, the plum blossom wrench can be directly adsorbed into the plum blossom notch 3 when it is aligned with the plum blossom notch 3, and continuous magnetic adsorption can prevent the plum blossom wrench from loosening due to a large gap.

[0021] One end of the strong magnet 9 close to the adhesive layer 8 is embedded in the interior of the central groove 7. The adhesive layer 8 becomes an elastomer after curing. The adhesive layer 8 can bond and fix the strong magnet 9 while using its own elasticity to buffer the impact of the back of the plum head wrench on the strong magnet when it is sucked into the plum blossom notch, thereby preventing the hard and brittle strong magnet from being damaged by the impact.

[0022] Working principle: In the utility model, the slotted end 2 of the screw body 1 is provided with a concave curved groove 4, which, together with the inner chamfer 5 of the plum blossom notch 3, can reduce the difficulty of aligning the plum blossom wrench with the plum blossom notch 3. Together with the strong magnet inside the plum blossom notch 3, the plum blossom wrench can be directly adsorbed into the plum blossom notch 3 when it is aligned with the plum blossom notch 3, and continuous magnetic adsorption can avoid loosening due to a large gap. The adhesive layer 8 arranged at the bottom of the strong magnet can bond and fix the strong magnet 9 while utilizing its own elasticity to buffer the impact of the back of the plum blossom wrench on the strong magnet when it is sucked into the plum blossom notch, thereby preventing the hard and brittle strong magnet from being damaged by the impact.

[0023] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A hexalobular groove screw, comprising a screw body (1), characterized in that: A slotted end (2) is provided at one end of the screw body (1), a plum blossom notch (3) is provided at the center of the slotted end (2), an inwardly concave curved groove (4) is provided at the end surface of the slotted end (2), an inner chamfer (5) is provided at the outer edge of the plum blossom notch (3), an arc-shaped curved bottom (6) is provided on the inner side of the plum blossom notch (3), a center groove (7) is provided at the center of the arc-shaped curved bottom (6) of the screw body (1), an adhesive layer (8) is provided at the innermost side of the center groove (7), and a strong magnet (9) is fixedly connected to the inside of the center groove (7) through the adhesive layer (8).

2. A hexalobular screw according to claim 1, characterized in that: One end of the strong magnet (9) close to the adhesive layer (8) is embedded in the interior of the central groove (7).

3. The hexalobular screw according to claim 1, characterized in that: The end of the screw body (1) away from the groove end (2) is provided with a chamfer.

4. The hexalobular screw according to claim 1, characterized in that: The adhesive layer (8) becomes an elastomer after curing.

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