CN221857245U - Bolt and adapter thereof - Google Patents

Abstract

The utility model relates to the technical field of fasteners, and specifically discloses a bolt and an adapter thereof, wherein the bolt includes a bolt body, a nut is provided at the upper end of the bolt body, the nut is a conical body, the upper end of the nut is a smooth plane, the outer wall of the nut is a smooth curved surface, a slot is provided on the smooth plane, the slot is parallel and staggered with the axis of the nut, and the bolt adapter includes a connecting sleeve and a polygonal prism, the connecting sleeve is provided with a sleeve groove matched with the outer wall of the nut at one end away from the polygonal prism, a positioning pin is provided in the sleeve groove, and the sleeve groove is parallel and staggered with the axis of the connecting sleeve. The slot deviates from the axis of the nut, and the positioning pin also deviates from the axis of the connecting sleeve. When a wrench is used to move the polygonal prism, the nut will also rotate with the cooperation of the positioning pin and the slot. Only when the adapter is used, the bolt can be normally unscrewed by a traditional wrench, the structure is simple, easy to produce, and the anti-theft effect is good.

Description

A bolt and its adapter

Technical Field

The utility model relates to the technical field of fasteners, in particular to a bolt and an adapter thereof.

Background Art

A bolt is a mechanical part, a cylindrical threaded fastener that is matched with a nut. A type of fastener consisting of a head and a screw (a cylinder with external threads), which must be matched with a nut to fasten two parts with through holes. The safety of bolt and nut fasteners in outdoor infrastructure is very important, such as the bolt and nut fasteners used in infrastructure such as railways, highway bridges, transmission towers, microwave communication towers, etc. In the prior art, conventional bolts and nuts can be easily disassembled, and therefore, they are often used as objects of theft or destruction by criminals, causing safety hazards to these infrastructures and causing serious property losses to the country.

For example, the Chinese patent CN202021129785.X discloses an anti-theft bolt, which includes a bolt body and an anti-theft cover. The bolt body includes a bolt head and a screw. The bolt head is formed by cutting a hemispherical ball head radially and a cross-shaped groove is provided on the cutting surface. The anti-theft cover is covered on the bolt head and the inner cavity of the anti-theft cover is adapted to the shape and size of the bolt head. The inner wall of the anti-theft cover is provided with a buckle that can form a snap-fit with the cross-shaped groove. The bolt has the advantages of easy installation and not easy to disassemble. The anti-theft buckle structure on this type of bolt is arranged on the inner side of the anti-theft cover and needs to be matched with the cross-shaped groove, so it will be more complicated in design. The bolts used for actual assembly are mostly designed to be relatively small in size, so it is not conducive to large-scale production and processing.

Utility Model Content

In view of the above problems, the utility model proposes a bolt and an adapter thereof, which are used to solve the shortcomings of the existing bolts that the buckle structure for anti-theft is relatively complex in design and is not conducive to large-scale production and processing.

To achieve the purpose of the utility model, the utility model is implemented by the following technical solutions: a bolt, including a bolt body, a nut is provided at the upper end of the bolt body, the nut is a conical body, the upper end of the nut is a smooth plane, and the outer side wall of the nut is a smooth curved surface;

A slot is provided on the smooth plane, and the slot is parallel and staggered with the axis of the nut.

A further improvement is that the bolt body is fixedly connected to the lower end of the nut and is integrally formed with the nut, and a thread is provided on the outer side of the bolt body.

A bolt adapter comprises a connecting sleeve and a polygonal prism, wherein the polygonal prism is fixedly connected to one end of the connecting sleeve, and a sleeve groove matching the outer wall of a nut is formed at one end of the connecting sleeve away from the polygonal prism;

A positioning pin is provided in the sleeve groove, and the positioning pin is fixedly connected to the bottom wall of the sleeve groove. The axis of the sleeve groove and the connecting sleeve are parallel and staggered. After the sleeve groove and the outer side wall of the nut are adapted, the positioning pin is inserted into the slot and slidably cooperates with the slot.

A further improvement is that the polygonal prism is a hexagonal prism.

A further improvement is that: the upper end of the connecting sleeve is processed with a first chamfer, and the lower end of the connecting sleeve is processed with a second chamfer, and both the first chamfer and the second chamfer are smooth arc chamfers.

The utility model has the following beneficial effects: the slot deviates from the axis of the nut, and the positioning pin also deviates from the axis of the connecting sleeve. When the polygonal prism is moved by a wrench, the nut will also rotate with the cooperation of the positioning pin and the slot. Only when the adapter is used can the bolt be normally unscrewed by a traditional wrench. The structure is simple, easy to produce, and has a good anti-theft effect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural diagram of a nut in a bolt.

FIG. 2 is a structural diagram of a positioning pin in a bolt adapter.

FIG. 3 is a structural diagram of a connecting sleeve in a bolt adapter.

FIG. 4 is a structural diagram of a sleeve groove in a bolt adapter.

FIG. 5 is a structural diagram of a polygonal prism in a bolt adapter.

Among them: 1. bolt body; 11. thread; 2. nut; 21. slot; 3. connecting sleeve; 31. sleeve groove; 32. positioning pin; 33. first chamfer; 34. second chamfer; 4. polygonal prism.

DETAILED DESCRIPTION

In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with an embodiment. The embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

As shown in FIG1 , a bolt is provided in this embodiment, including a bolt body 1, a nut 2 is provided at the upper end of the bolt body 1, the nut 2 is a conical body, the upper end of the nut 2 is a smooth plane, and the outer wall of the nut 2 is a smooth curved surface; the diameter of the upper end surface of the nut 2 is greater than the diameter of the lower end surface thereof. During the assembly process, since the outer wall of the nut 2 is a smooth curved surface, when the nut 2 is screwed, the nut 2 can only be screwed through a specific adapter to screw the thread 11 out of the bolt hole.

A slot 21 is provided on the smooth plane, and the slot 21 is parallel to and staggered from the axis of the nut 2;

Regarding the connection method between the bolt body 1 and the nut 2: the bolt body 1 is fixedly connected to the lower end of the nut 2 and is integrally formed with the nut 2, and a thread 11 is provided on the outer side of the bolt body 1.

Please refer to Figure 1, Figure 2, Figure 3, Figure 4, Figure 5:

A bolt adapter includes a connecting sleeve 3 and a polygonal prism 4, wherein the polygonal prism 4 is fixedly connected to one end of the connecting sleeve 3, and a sleeve groove 31 adapted to the outer wall of the nut 2 is opened at the end of the connecting sleeve 3 away from the polygonal prism 4; when the bolt is unscrewed from the bolt hole, the connecting sleeve 3 needs to be put on the outside of the nut 2 first, and the sleeve groove 31 opened on the outside of the connecting sleeve 3 will fit with the outer wall of the nut 2.

A positioning pin 32 is provided in the sleeve groove 31, and the positioning pin 32 is fixedly connected to the bottom wall of the sleeve groove 31. The sleeve groove 31 is parallel to the axis of the connecting sleeve 3 and staggered. After the sleeve groove 31 is adapted to the outer wall of the nut 2, the positioning pin 32 is inserted into the slot 21 and slidably cooperates with the slot 21. When the connecting sleeve 3 is sleeved on the outer side of the nut 2, the positioning pin 32 in the sleeve groove 31 will be inserted into the slot 21 opened at the upper end of the nut 2. Since the slot 21 deviates from the axis of the nut 2, the positioning pin 32 also deviates from the axis of the connecting sleeve 3. When the polygonal prism 4 is moved with a wrench to rotate the connecting sleeve 3, the nut 2 will also rotate with the cooperation of the positioning pin 32 and the slot 21.

Only when the adapter is used, the bolt can be normally unscrewed with a traditional wrench, thereby achieving the purpose of theft prevention.

Specifically, the polygonal prism 4 is a hexagonal prism. When rotating the polygonal prism 4, a wrench with a hexagonal socket can be used to rotate the polygonal prism 4. In addition to the hexagonal prism, other polygonal prism structures can also be used as an alternative, and are not limited to the one described above.

In a preferred solution, the upper edge of the connecting sleeve 3 is processed with a first chamfer 33, and the lower edge of the connecting sleeve 3 is processed with a second chamfer 34, and both the first chamfer 33 and the second chamfer 34 are smooth arc chamfers. The upper edge and the lower edge of the first chamfer 33 are provided with the first chamfer 33 and the second chamfer 34, which can avoid scratches on personnel or equipment when taking the connecting sleeve 3. At the same time, it can also improve the appearance of the product and improve the overall quality of the product.

Working principle: When the connecting sleeve 3 is sleeved on the outside of the nut 2, the positioning pin 32 in the sleeve groove 31 will be inserted into the slot 21 opened at the upper end of the nut 2. Since the slot 21 deviates from the axis of the nut 2, the positioning pin 32 also deviates from the axis of the connecting sleeve 3. When the polygonal prism 4 is moved with a wrench to rotate the connecting sleeve 3, the nut 2 will also rotate with the cooperation of the positioning pin 32 and the slot 21, and the thread 11 will be screwed out of the bolt hole. Only when the adapter is used, the bolt can be screwed out normally with a traditional wrench, which has a simple structure and good anti-theft effect.

The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims (5)

1. A bolt, comprising a bolt body (1), wherein a nut (2) is disposed at the upper end of the bolt body (1), wherein the nut (2) is a conical body, the upper end of the nut (2) is a smooth plane, and the outer side wall of the nut (2) is a smooth curved surface; A slot (21) is provided on the smooth plane, and the slot (21) is parallel and staggered with the axis of the nut (2). 2. A bolt according to claim 1, characterized in that: the bolt body (1) is fixedly connected to the lower end of the nut (2) and is integrally formed with the nut (2), and a thread (11) is provided on the outer side of the bolt body (1). 3. A bolt adapter, characterized in that it comprises a connecting sleeve (3) and a polygonal prism (4) applied to the bolt according to any one of claims 1 to 2, wherein the polygonal prism (4) is fixedly connected to one end of the connecting sleeve (3), and the connecting sleeve (3) is provided with a sleeve groove (31) adapted to the outer wall of the nut (2) at one end away from the polygonal prism (4); A positioning pin (32) is provided in the sleeve groove (31), and the positioning pin (32) is fixedly connected to the bottom wall of the sleeve groove (31). The sleeve groove (31) is parallel to and staggered from the axis of the connecting sleeve (3). After the sleeve groove (31) is adapted to the outer side wall of the nut (2), the positioning pin (32) is inserted into the slot (21) and slidably matches with the slot (21). 4. A bolt adapter according to claim 3, characterized in that the polygonal prism (4) is a hexagonal prism. 5. A bolt adapter according to claim 4, characterized in that: a first chamfer (33) is processed along the upper end of the connecting sleeve (3), and a second chamfer (34) is processed along the lower end of the connecting sleeve (3), and the first chamfer (33) and the second chamfer (34) are both smooth circular chamfers.