CN207814162U - It is a kind of that there is round and square cross-sectional shape reducing bolt - Google Patents

Abstract

The utility model discloses a variable-diameter bolt with circular and square section shapes, which comprises a large cylinder section, a square column section, a small cylinder section, a nut, a thread section, a first connected part, a second connected part and a second connected part. Three connected pieces, one end of the threaded section is fixedly connected with a small cylindrical section, a square column section and a large cylindrical section in turn, and the nuts are threadedly linked between the threaded sections, the first connected piece is set outside the large cylindrical section, and the second is connected One piece is set outside the square column section, and the third connected piece is set outside the small cylinder section. Compared with the prior art, the connected parts installed on the two cylindrical sections of the utility model can rotate relative to the bolt rods, while the connected parts installed on the square column sections cannot be connected with the bolts due to the limitation of the hole shape. The rod is relatively rotated, so that the bolt is fixed and the connected part can rotate along the bolt rod, which has the value of popularization and application.

Description

A reducing bolt with circular and square cross-sectional shapes

technical field

The utility model relates to the field of mechanical design, in particular to a variable-diameter bolt with circular and square cross-sectional shapes.

Background technique

The existing variable diameter bolt has a circular cross-sectional shape of each section, and has a wide range of application fields. However, during mechanical installation, when the bolts need to be fixed and the connected parts can rotate along the bolt shaft, the reduced diameter bolts whose cross-sectional shapes are circular in each section cannot meet the requirements of mechanical installation. In view of this situation, the utility model designs a reducing bolt with circular and square cross-sectional shapes.

Utility model content

The purpose of this utility model is to provide a reducing bolt with circular and square cross-sectional shapes in order to solve the above problems.

The utility model realizes above-mentioned purpose through following technical scheme:

The utility model comprises a large cylindrical section, a square column section, a small cylindrical section, a nut, a threaded section, a first connected piece, a second connected piece and a third connected piece. The small cylinder section, the square column section and the large cylinder section, the nut is threadedly connected between the threaded sections, and the first connected part is provided with a through hole matching the diameter of the large cylinder section. hole, the first connected piece is set on the outside of the large cylindrical section, the second connected piece is provided with a through hole matching the outside of the square column section, and the second connected piece is set on the large cylindrical section Outside the square column section, the third connected piece is provided with a through hole matching the diameter of the small cylindrical section, and the third connected piece is sleeved outside the small cylindrical section.

The beneficial effects of the utility model are:

The utility model is a variable-diameter bolt with circular and square cross-section shapes. Compared with the prior art, the utility model is installed on two cylindrical section sections to be connected, which can rotate relative to the bolt rod, while The connected part installed on the square column section cannot be rotated relative to the bolt rod due to the limitation of the hole shape, so that the bolt is fixed and the connected part can rotate along the bolt rod, which has the value of popularization and application.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is the cross-sectional structure schematic diagram of large cylinder section, square column section and small cylinder section of the utility model;

Fig. 3 is a schematic cross-sectional structure diagram of the first connected part, the second connected part and the third connected part of the present invention.

In the figure: 1-large cylinder section, 2-square column section, 3-small cylinder section, 4-nut, 5-thread section, 6-first connected part, 7-second connected part, 8-third to be connected.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in Figures 1 to 3: the utility model includes a large cylindrical section 1, a square column section 2, a small cylindrical section 3, a nut 4, a threaded section 5, a first connected part 6, a second connected part 7 and a first connected part Three connected parts 8, one end of the threaded section 4 is sequentially fixedly connected to the small cylindrical section 3, the square column section 2 and the large cylindrical section 1, and the nut 4 is between the threaded sections 5 Threaded connection, the first connected part 6 is provided with a through hole matching the diameter of the large cylindrical section 1, the first connected part 6 is sleeved outside the large cylindrical section 1, and the second connected part The connecting piece 7 is provided with a through hole matching the outside of the square column section 2, the second connected piece 7 is set outside the square column section 2, and the third connected piece 8 is provided with a The diameter of the small cylindrical section 3 matches the through hole, and the third connected part 8 is set outside the small cylindrical section 3 .

The working principle of the utility model is as follows:

1. Remove the nut 4 installed on the threaded section 5;

2. Prepare the first connected part 6, the second connected part 7 and the third connected part 8, and install them on the large cylindrical section 1, the square column section 2 and the small cylindrical section 3 in sequence;

3. Install the nut 4 on the threaded section 5;

4. At this time, the first connected part 6 and the third connected part 8 installed on the large cylindrical section 1 and the small cylindrical section 3 can rotate relative to the whole bolt rod; while the first connected part installed on the square column section 2 The second connected part 7 cannot rotate relative to the bolt shaft due to the restriction of the hole shape, so that the first connected part 6 and the third connected part 8 can rotate along the bolt shaft while the variable diameter bolt is fixed.

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (1)

1. A reducing bolt with circular and square cross-sectional shapes, characterized in that: it includes a large cylindrical section, a square column section, a small cylindrical section, a nut, a threaded section, the first connected part, the second connected part and The third connected part, one end of the threaded section is fixedly connected with the small cylindrical section, the square column section and the large cylindrical section in sequence, the nut is threadedly linked between the threaded sections, and the first A connected part is provided with a through hole matching the diameter of the large cylindrical section, the first connected part is set outside the large cylindrical section, and the second connected part is provided with a The external matching through hole, the second connected piece is set outside the square column section, the third connected piece is provided with a through hole matching the diameter of the small cylindrical section, and the third connected piece The connecting piece is sleeved on the outside of the small cylindrical section.