Outer hexagon nut

Abstract

The utility model discloses an outer hexagonal nut, which relates to the field of nuts, and adopts the technical scheme that the outer hexagonal nut comprises an inner layer and an outer hexagonal layer, a threaded hole is formed in the center of the inner layer, a breaking groove with a triangular section is formed in the outer peripheral wall of the inner layer, and a groove corresponding to the breaking groove is formed in the inner peripheral wall of the threaded hole; and one inner side wall of the groove is fixedly connected with a barrier strip. When the nut and the bolt are stuck, people detach the outer hexagonal layer from the inner layer firstly, so that the thickness of the wall needing to be broken integrally is reduced, the section of the breaking groove is triangular, the tip of the triangle is aligned with the groove, stress concentration is easily caused in the breaking process to facilitate breaking of the inner layer, and the barrier strip can prevent a breaking tool from rushing out of the groove. Therefore, damage of a breaking tool to the bolt is reduced, the situation of overexertion of people is reduced, brass has the advantage of being high in strength, and the overall strength of the nut is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of nuts, and more specifically, to an external hexagonal nut. Background Technology

[0002] An external hex nut is a common fastener. It has a standard hexagonal structure on the outside and a threaded hole inside. It needs to be used with bolts, screws or external threaded parts.

[0003] During use, certain situations may arise with external hex nuts, such as: the nut and bolt threads rusting together; the external hexagon being worn rounded by tools, making it impossible for a wrench to engage; excessive force during installation causing it to "seize"; or it becoming stuck due to thermal expansion. In these cases, the external hex nut cannot be removed from the bolt with a wrench. Generally, it is necessary to break the external hex nut to remove it from the bolt. However, the existing external hex nuts have relatively thick walls and smooth outer walls, making them quite difficult to remove.

[0004] Therefore, a new solution is needed to address this problem. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an external hexagonal nut.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an external hexagonal nut, comprising an inner layer and an external hexagonal layer, wherein the external hexagonal layer is sleeved on the outer peripheral wall of the inner layer and is separable from the inner layer, wherein the inner layer has a threaded hole at its center, and the outer peripheral wall of the inner layer has a breaking groove with a triangular cross-section, wherein the inner peripheral wall of the threaded hole has a groove corresponding to the breaking groove, wherein a barrier strip is fixedly connected to one inner sidewall of the groove, and there is a distance between the barrier strip and the other inner sidewall of the groove.

[0007] The present invention is further configured such that a support strip is fixedly connected to the inner peripheral wall of the outer hexagonal layer, and the support strip is used to fill the breaking groove.

[0008] The present invention is further configured such that: a positioning block is fixedly connected to the outer peripheral wall of the inner layer; a positioning slot adapted to the positioning block is provided on the inner peripheral wall of the outer hexagonal layer; a snap-fit ​​hole penetrating its thickness direction is provided on the positioning block; a rod is fixedly connected to the inner wall of the positioning slot; and the rod and the snap-fit ​​hole are interference fit.

[0009] The present invention is further configured such that: a force-applying groove is formed on the outer wall of the outer hexagonal layer, and an embedded groove is formed on the inner wall of the force-applying groove facing away from the positioning slot.

[0010] The present invention is further configured such that the end of the insertion rod away from the inner wall of the positioning slot is conical.

[0011] The present invention is further configured such that both the inner layer and the outer hexagonal layer are made of brass.

[0012] In summary, this utility model has the following beneficial effects:

[0013] When a nut and bolt become stuck, the outer hexagonal layer is first removed from the inner layer, reducing the overall wall thickness that needs to be broken. After removing the outer hexagonal layer, the breaking groove on the inner layer is exposed. The breaking tool is then inserted into the breaking groove to apply force. Because the cross-section of the breaking groove is triangular, and the apex of the triangle is aligned with the groove, stress concentration is easily created during the breaking process, facilitating the breaking of the inner layer. When the breaking tool cuts into the groove, it will come into contact with the barrier strip, which will prevent the breaking tool from rushing out of the groove, thus reducing damage to the bolt and minimizing the possibility of excessive force. Furthermore, only the inner layer is broken, while the outer hexagonal layer can still be reused, which can also improve the material utilization rate. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is an exploded view of the present invention;

[0016] Figure 3 This is a cross-sectional view of the outer hexagonal layer in this utility model.

[0017] In the diagram: 1. Inner layer; 2. Outer hexagonal layer; 3. Threaded hole; 4. Breaking groove; 5. Groove; 6. Barrier strip; 7. Support strip; 8. Positioning block; 9. Positioning slot; 10. Snap-fit ​​hole; 11. Insert rod; 12. Force application groove; 13. Embedded groove. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] External hexagonal nuts, such as Figure 1 and Figure 2As shown, the structure includes an inner layer 1 and an outer hexagonal layer 2. The outer hexagonal layer 2 is fitted onto the outer peripheral wall of the inner layer 1 and is separable from the inner layer 1. The inner layer 1 has a threaded hole 3 at its center. The outer peripheral wall of the inner layer 1 has a triangular-shaped breaking groove 4. The inner peripheral wall of the threaded hole 3 has a groove 5 corresponding to the breaking groove 4. A barrier strip 6 is fixedly connected to one inner side wall of the groove 5. There is a distance between the barrier strip 6 and the other inner side wall of the groove 5. The barrier strip 6 is located within the groove 5 and does not interfere with the internal thread of the threaded hole 3. When the nut and bolt become stuck, the outer hexagonal layer 2 is first removed from the inner layer 1, thereby reducing the overall wall thickness that needs to be broken. After removing the outer hexagonal layer 2... The inner layer 1 is then exposed by the breaking groove 4. A breaking tool is inserted into the groove 4 to apply force. Because the cross-section of the breaking groove 4 is triangular, and the apex of the triangle aligns with the groove 5, stress concentration is easily created during the breaking process, facilitating the breaking of the inner layer 1. When the breaking tool cuts into the groove 5, it comes into contact with the barrier strip 6, which prevents the tool from being pushed out of the groove 5, thus reducing damage to the bolt and minimizing the risk of excessive force. Furthermore, only the inner layer 1 is broken; the outer hexagonal layer 2 can still be reused, improving material utilization. Both the inner layer 1 and the outer hexagonal layer 2 are made of brass. Brass has high strength, ensuring the overall strength of the nut.

[0020] like Figure 2 and Figure 3As shown, a support strip 7 is fixedly connected to the inner peripheral wall of the outer hexagonal layer 2. The support strip 7 is used to fill the breaking groove 4. When the outer hexagonal layer 2 and the inner layer 1 are combined, the support strip 7 is located in the breaking groove 4, thereby providing support for the breaking groove 4. This ensures that the position of the breaking groove 4 will not deform during the tightening process of the nut. A positioning block 8 is fixedly connected to the outer peripheral wall of the inner layer 1. A positioning slot 9 adapted to the positioning block 8 is provided on the inner peripheral wall of the outer hexagonal layer 2. A snap-fit ​​hole 10 penetrating its thickness direction is provided on the positioning block 8. A rod 11 is fixedly connected to the inner wall of the positioning slot 9. The rod 11 and the snap-fit ​​hole 10 are interference fit. The cooperation of the support strip 7 and the breaking groove 4 provides guidance for people to assemble the inner layer 1 and the outer hexagonal layer 2. When the positioning block 8 is inserted into the positioning slot 9, the rod 11 is inserted into the snap-fit ​​hole 10. Because the insertion rod 11 and the snap-fit ​​hole 10 are interference fit, the inner layer 1 and the outer hexagonal layer 2 are firmly snapped together, and they are not easy to separate. The end of the insertion rod 11 away from the inner wall of the positioning slot 9 is conical, which makes it easy for people to insert the insertion rod 11 into the snap-fit ​​hole 10. The outer wall of the outer hexagonal layer 2 is provided with a force-applying groove 12, and the inner wall of the force-applying groove 12 facing away from the positioning slot 9 is provided with an embedded groove 13. When people need to separate the inner layer 1 and the outer hexagonal layer 2, they insert a force-applying tool into the embedded groove 13 to apply force. Because the threaded hole 3 in the inner layer 1 is firmly fixed with the bolt thread, the insertion rod 11 and the snap-fit ​​hole 10 will slowly separate during the force application process until the insertion rod 11 is completely separated from the snap-fit ​​hole 10, thereby achieving the separation of the inner layer 1 and the outer hexagonal layer 2, and thus achieving the purpose of removing the outer hexagonal layer 2.

[0021] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A type of external hexagonal nut, characterized in that: It includes an inner layer (1) and an outer hexagonal layer (2). The outer hexagonal layer (2) is sleeved on the outer peripheral wall of the inner layer (1) and can be separated from the inner layer (1). The center of the inner layer (1) is provided with a threaded hole (3). The outer peripheral wall of the inner layer (1) is provided with a breaking groove (4) with a triangular cross section. The inner peripheral wall of the threaded hole (3) is provided with a groove (5) corresponding to the breaking groove (4). A barrier strip (6) is fixedly connected to one inner side wall of the groove (5). There is a distance between the barrier strip (6) and the other inner side wall of the groove (5).

2. The external hexagonal nut according to claim 1, characterized in that: A support strip (7) is fixedly connected to the inner peripheral wall of the outer hexagonal layer (2), and the support strip (7) is used to fill the breaking groove (4).

3. The external hexagonal nut according to claim 1, characterized in that: A positioning block (8) is fixedly connected to the outer peripheral wall of the inner layer (1). A positioning slot (9) adapted to the positioning block (8) is opened on the inner peripheral wall of the outer hexagonal layer (2). A snap-fit ​​hole (10) penetrating its thickness direction is opened on the positioning block (8). A plug rod (11) is fixedly connected to the inner wall of the positioning slot (9). The plug rod (11) and the snap-fit ​​hole (10) are interference fit.

4. The external hexagonal nut according to claim 3, characterized in that: The outer hexagonal layer (2) has a force-applying groove (12) on its outer wall, and the force-applying groove (12) has an embedded groove (13) on its inner wall facing away from the positioning slot (9).

5. The external hexagonal nut according to claim 3, characterized in that: The end of the insertion rod (11) away from the inner wall of the positioning slot (9) is conical.

6. The external hexagonal nut according to claim 1, characterized in that: Both the inner layer (1) and the outer hexagonal layer (2) are made of brass.

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