CN212155396U - A length adjustable bolt - Google Patents

Abstract

The embodiment of the utility model discloses a length-adjustable bolt, which comprises a first threaded post, a second threaded post is arranged at the bottom of the first threaded post, and a connecting post is fixed at the top center of the second threaded post , and the second threaded column is connected with the first threaded column through a connecting column, the top of the connecting column is fixedly provided with a column head, and the top center of the column head is provided with a first cross groove. In the present invention, a cross screwdriver matched with the first cross groove is inserted into the threaded groove, and the connecting post is screwed clockwise. Since the connecting post is threadedly connected with the first threaded post, the connecting post drives the second threaded post to rotate down. After the length is adjusted properly, stop rotating the connecting column, the first threaded column and the second threaded column can pass through the workpiece, and screw the nut into the second threaded column to complete the fixing of the workpiece. The bolt can be adjusted according to the thickness of the workpiece. Length adjustment, wide range of use.

Description

A length adjustable bolt

technical field

The utility model relates to the technical field of bolts, in particular to a bolt with adjustable length.

Background technique

A bolt is a mechanical part, a cylindrical threaded fastener with a nut, a type of fastener consisting of a head and a screw (a cylinder with an external thread), which needs to be matched with a nut for tightening. Solid connection of two parts with through holes;

The prior art has the following deficiencies: the bolts are designed as an integral structure, and when the thickness of the connecting workpiece is greater than the length of the bolts, it is necessary to replace the bolts with the same length, resulting in a narrow use range of the bolts.

Therefore, it is necessary to invent a length-adjustable bolt to solve the above problems.

Utility model content

To this end, an embodiment of the present invention provides a length-adjustable bolt. By inserting a cross screwdriver matching the first cross groove into the threaded groove, and screwing the connecting post clockwise, the connecting post is threaded with the first threaded post. At this time, the connecting column drives the second threaded column to rotate and move down. After the length is adjusted properly, stop rotating the connecting column, and then the first threaded column and the second threaded column can pass through the workpiece, and screw the second threaded column through the nut. After completing the fixation of the workpiece, the bolt can be adjusted in length according to the thickness of the workpiece, and has a wide range of use, so as to solve the problems raised in the above-mentioned background art.

In order to achieve the above purpose, the embodiments of the present utility model provide the following technical solutions: a length-adjustable bolt, comprising a first threaded column, the bottom of the first threaded column is provided with a second threaded column, and the second threaded column is provided with a second threaded column. A connecting column is fixed at the center of the top end, and the second threaded column and the first threaded column are connected by the connecting column, the top of the connecting column is fixedly provided with a column head, and the top center of the column head is provided with a first cross groove , the top of the first threaded column is fixedly provided with a limit head, and the center of the top of the limit head is provided with a second cross groove.

Preferably, the connecting post and the first threaded post are connected by threads.

Preferably, a threaded groove is provided at the inner center of the first threaded post, and the connecting post is matched with the threaded groove.

Preferably, the limiting head and the first threaded post are designed as an integral structure, and the second cross groove is communicated with the threaded groove.

Preferably, a nut is provided on the outer side of the bottom end of the second threaded column, and the nut is threadedly connected to the second threaded column.

Preferably, a first washer is sleeved on the outer side of the bottom of the second threaded post, and a second washer is sleeved on the outer side of the top of the first threaded post.

The embodiments of the present utility model have the following advantages:

In the present invention, a cross screwdriver matched with the first cross groove is inserted into the threaded groove, and the connecting column is screwed clockwise. Since the connecting column is threadedly connected with the first threaded column, at this time, the connecting column drives the second threaded column to rotate downward. After the length is adjusted properly, stop rotating the connecting column, the first threaded column and the second threaded column can pass through the workpiece, and screw the nut into the second threaded column to complete the fixing of the workpiece, which is consistent with the existing integrated structure design. Compared with non-adjustable bolts, this bolt can be adjusted in length according to the thickness of the workpiece and has a wide range of applications.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that are required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, other implementation drawings can also be obtained according to the extension of the drawings provided without creative efforts.

The structures, proportions, sizes, etc. shown in this specification are only used to cooperate with the contents disclosed in the specification, so as to be understood and read by those who are familiar with the technology, and are not used to limit the conditions that the present invention can be implemented. The technical substantive significance, the modification of any structure, the change of the proportional relationship or the adjustment of the size, without affecting the effect that the utility model can produce and the purpose that can be achieved, should still fall within the scope disclosed in the present utility model. The technical content must be within the scope of coverage.

Figure 1 is a longitudinal sectional view of the utility model.

FIG. 2 is a usage scene diagram of the present invention.

FIG. 3 is a top view of the utility model.

Figure 4 is a front view of the utility model.

In the figure: 1. The first threaded column; 2. The second threaded column; 3. The connecting column; 4. The column head; 5. The first cross groove; 6. The thread groove; 7. The second cross groove; ; 9. Nut; 10. The first washer; 11. The second washer.

Detailed ways

The embodiments of the present invention will be described below by specific specific embodiments. Those who are familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are of the present invention. Some examples, but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

The utility model provides a length-adjustable bolt as shown in Figures 1-4, comprising a first threaded column 1, and a second threaded column 2 is provided at the bottom of the first threaded column 1. The second threaded column A connecting column 3 is fixed at the center of the top end of 2, and the second threaded column 2 and the first threaded column 1 are connected through the connecting column 3. The center of the top is provided with a first cross groove 5, the top of the first threaded column 1 is fixedly provided with a limit head 8, and the center of the top of the limit head 8 is provided with a second cross groove 7;

Further, in the above technical solution, the connecting column 3 is connected with the first threaded column 1 through threads, which is convenient for assembly and disassembly;

Further, in the above technical solution, the inner center of the first threaded column 1 is provided with a threaded groove 6, and the connecting column 3 is matched with the threaded groove 6, and the provided threaded groove 6 facilitates the connection of the connecting column 3. place;

Further, in the above technical solution, the limiting head 8 and the first threaded column 1 are designed in an integral structure, and the second cross groove 7 is communicated with the threaded groove 6;

Further, in the above technical solution, a nut 9 is provided on the outer side of the bottom end of the second threaded column 2, and the nut 9 is threadedly connected with the second threaded column 2 to facilitate assembly;

Further, in the above technical solution, a first washer 10 is sleeved on the outer side of the bottom of the second threaded column 2, and a second washer 11 is sleeved on the outer side of the top of the first threaded column 1. The washer 10 and the second washer 11 effectively protect the workpiece.

The specific embodiment is: during use, when the thickness of the connecting workpiece is greater than the length of the bolt, the length of the bolt can be adjusted. Rotate the connecting column 3 clockwise, because the connecting column 3 is threadedly connected with the first threaded column 1, at this time the connecting column 3 drives the second threaded column 2 to rotate and move downward. After the length is adjusted properly, stop rotating the connecting column 3, and the first A threaded column 1 and a second threaded column 2 pass through the workpiece, and are screwed into the second threaded column 2 through the nut 9 to complete the fixing of the workpiece. After fixing, the first washer 10 and the second washer 11 perform decompression treatment for the workpiece. The length of the bolt can be adjusted according to the thickness of the workpiece, and the use range is wide. This embodiment specifically solves the problem of the narrow use range of the bolt in the prior art.

Working principle: The adjustment method is to insert the cross screwdriver matching the first cross groove 5 into the threaded groove 6, and twist the connecting column 3 clockwise. Since the connecting column 3 is threadedly connected with the first threaded column 1, the connection is The column 3 drives the second threaded column 2 to rotate and move downward. After the length is properly adjusted, the rotation of the connecting column 3 is stopped.

Although the present utility model has been described in detail above with general description and specific embodiments, some modifications or improvements can be made on the basis of the present utility model, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not departing from the spirit of the present invention belong to the scope of protection of the present invention.

Claims (6)

1. A bolt with adjustable length, comprising a first threaded column (1), characterized in that: the bottom of first screw thread post (1) is equipped with second screw thread post (2), the fixed spliced pole (3) that is equipped with in top center department of second screw thread post (2), just second screw thread post (2) are connected through spliced pole (3) with first screw thread post (1), the fixed column cap (4) that is equipped with in top of spliced pole (3), the top center department of column cap (4) is equipped with first cross recess (5), the top of first screw thread post (1) is fixed and is equipped with spacing head (8), the top center department of spacing head (8) is equipped with second cross recess (7).

2. A length adjustable bolt according to claim 1, wherein: the connecting column (3) is in threaded connection with the first threaded column (1).

3. A length adjustable bolt according to claim 1, wherein: the inner center of the first threaded column (1) is provided with a thread groove (6), and the connecting column (3) is matched with the thread groove (6).

4. A length adjustable bolt according to claim 3, wherein: the limiting head (8) and the first threaded column (1) are designed into an integral structure, and the second cross-shaped groove (7) is communicated with the threaded groove (6).

5. A length adjustable bolt according to claim 1, wherein: and a nut (9) is arranged on the outer side of the bottom end of the second threaded column (2), and the nut (9) is in threaded connection with the second threaded column (2).

6. A length adjustable bolt according to claim 1, wherein: the bottom outside cover of second screw thread post (2) is equipped with first packing ring (10), the top outside cover of first screw thread post (1) is equipped with second packing ring (11).

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