CN216077900U - Hydraulic tight-fitting bolt - Google Patents
Hydraulic tight-fitting bolt Download PDFInfo
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- CN216077900U CN216077900U CN202121887132.2U CN202121887132U CN216077900U CN 216077900 U CN216077900 U CN 216077900U CN 202121887132 U CN202121887132 U CN 202121887132U CN 216077900 U CN216077900 U CN 216077900U
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Abstract
A hydraulic tight-fitting bolt comprises an oil cylinder, wherein a piston hole is processed in the oil cylinder; a bolt is movably arranged in the piston hole; the upper part of the bolt is sequentially provided with a first column head and a second column head, and the lower part of the second column head is connected with a threaded column; the first column head protrudes out of the upper part of the oil cylinder; the second cylinder is positioned in the piston hole, and an annular oil groove is formed between the bottom of the second cylinder and the piston hole; the outer side of the upper part of the oil cylinder is in threaded connection with a locking nut, and the locking nut is positioned below the first column head; a plurality of threaded blind holes are uniformly distributed on the surface of the upper end of the oil cylinder; a through hole is processed on the first column head corresponding to the threaded blind hole; and a screw is arranged in the through hole in a penetrating manner and is connected with the threaded blind hole. According to the utility model, after the bolt is stretched, the locking nut is screwed to support the bolt, and an oil pump is not required to continuously output oil pressure; secondly, after the hydraulic oil cylinder is used, the hydraulic tight-fitting bolt is used for releasing pressure, the bolt and the oil cylinder are completely reset by screwing the bolt, and the surface of the bolt is prevented from being damaged by knocking the bolt.
Description
Technical Field
The utility model relates to the field of mechanical parts, in particular to a hydraulic tight-fitting bolt.
Background
The hydraulic tight-fitting bolt has large pretightening force and is not easy to loosen, the locking force of the bolt can be kept only by continuously outputting pressure by an oil pump when the existing hydraulic tight-fitting bolt works, and the internal oil duct is easily damaged by long-time high pressure; when the pressure is relieved, the bolt cannot be completely reset due to the fact that hydraulic oil is high in viscosity and slow in flowing, and the bolt can be completely reset only through manual repeated knocking.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a hydraulic tight-fitting bolt aiming at the defects of the prior art. In order to solve the technical problems, the utility model adopts the technical scheme that:
a hydraulic tight-fitting bolt comprises an oil cylinder, wherein a piston hole is processed in the oil cylinder; a bolt is movably arranged in the piston hole; the upper part of the bolt is sequentially provided with a first column head and a second column head, and the lower part of the second column head is connected with a threaded column; the first column head protrudes out of the upper part of the oil cylinder; the second cylinder is positioned in the piston hole, and an annular oil groove is formed between the bottom of the second cylinder and the piston hole; the outer side of the upper part of the oil cylinder is in threaded connection with a locking nut, and the locking nut is positioned below the first column head; a plurality of threaded blind holes are uniformly distributed on the surface of the upper end of the oil cylinder; a through hole is processed on the first column head corresponding to the threaded blind hole; and a screw is arranged in the through hole in a penetrating manner and is connected with the threaded blind hole.
Furthermore, a first poking hole and a second poking hole are respectively machined in the first column head and the side face of the locking nut.
Furthermore, the outer side of the second column head and the outer side of the threaded column are respectively provided with a first piston sealing ring and a second piston sealing ring which are sealed with an annular oil groove.
Further, the side face of the oil cylinder is connected with an oil inlet joint, and the oil inlet joint is communicated with the annular oil groove through an oil duct.
Compared with the prior art, the hydraulic tight-fitting bolt has the advantages that after the bolt is stretched, the locking nut is screwed to support the bolt, and an oil pump is not required to continuously output oil pressure; secondly, after the hydraulic oil cylinder is used, the hydraulic tight-fitting bolt is used for releasing pressure, the bolt and the oil cylinder are completely reset by screwing the bolt, and the surface of the bolt is prevented from being damaged by knocking the bolt.
Drawings
FIG. 1 is a schematic structural view of the present invention;
the oil cylinder comprises an oil cylinder 1, an oil cylinder 2, a first column head 3, a second column head 4, a threaded column 5, an annular oil groove 6, an oil inlet joint 7, a locking nut 8, a screw 9, a first poking hole 10, a second poking hole 11, a first piston sealing ring 12 and a second piston sealing ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below.
As shown in fig. 1, a hydraulic tight-fitting bolt comprises an oil cylinder 1, wherein a piston hole is processed in the oil cylinder; a bolt is movably arranged in the piston hole; the upper part of the bolt is sequentially provided with a first column head 2 and a second column head 3, the lower part of the second column head 2 is connected with a threaded column 4, and the threaded column 4 extends out of the piston hole; the first column head 2 protrudes out of the upper part of the oil cylinder 1; the second column head 3 is positioned in the piston hole, and an annular oil groove 5 is formed between the bottom of the second column head 3 and the piston hole; the side surface of the oil cylinder 1 is connected with an oil inlet joint 6, and the oil inlet joint 6 is communicated with an annular oil groove 5 through an oil duct; the outer side of the upper part of the oil cylinder 1 is in threaded connection with a locking nut 7, and the locking nut 7 is positioned below the first column cap 2; a plurality of threaded blind holes are uniformly distributed on the surface of the upper end of the oil cylinder 1; a through hole is processed on the first column cap 2 corresponding to the threaded blind hole; and a screw 8 is arranged in the through hole in a penetrating manner and is connected with the threaded blind hole.
And a first poking hole 9 and a second poking hole 10 are respectively machined on the side surfaces of the first column head 2 and the locking nut 7.
And a first piston sealing ring 11 and a second piston sealing ring 12 which are sealed with the annular oil groove 5 are respectively arranged on the outer side of the second column head 3 and the outer side of the threaded column 4.
When the hydraulic tight-fitting bolt is used, the threaded column 4 of the bolt is screwed with a mechanical part, high-pressure oil is introduced into the annular oil groove 5 through the oil inlet joint 6 to stretch the bolt, then the locking nut 7 is screwed to be close to the first column cap 2, and then the high-pressure oil is not required to be introduced into the annular oil groove 5; after the hydraulic tight-fitting bolt is used, the locking nut 7 is loosened, the screw 8 is screwed, and high-pressure oil is exhausted outwards through the oil inlet connector 6.
The present invention is not limited to the embodiments described above, and those skilled in the art may make modifications or changes within the scope of the disclosure without departing from the spirit of the present invention, so that the scope of the present invention is defined by the appended claims.
Claims (4)
1. The utility model provides a hydraulic tight-fitting bolt which characterized in that: comprises an oil cylinder, wherein a piston hole is processed in the oil cylinder; a bolt is movably arranged in the piston hole; the upper part of the bolt is sequentially provided with a first column head and a second column head, and the lower part of the second column head is connected with a threaded column; the first column head protrudes out of the upper part of the oil cylinder; the second cylinder is positioned in the piston hole, and an annular oil groove is formed between the bottom of the second cylinder and the piston hole; the outer side of the upper part of the oil cylinder is in threaded connection with a locking nut, and the locking nut is positioned below the first column head; a plurality of threaded blind holes are uniformly distributed on the surface of the upper end of the oil cylinder; a through hole is processed on the first column head corresponding to the threaded blind hole; and a screw is arranged in the through hole in a penetrating manner and is connected with the threaded blind hole.
2. The hydraulic tight-fitting bolt of claim 1, wherein: and a first poking hole and a second poking hole are respectively processed on the first column head and the side surface of the locking nut.
3. The hydraulic tight-fitting bolt of claim 1, wherein: and a first piston sealing ring and a second piston sealing ring which are sealed with annular oil grooves are respectively arranged on the outer side of the second column head and the outer side of the threaded column.
4. The hydraulic tight-fitting bolt of claim 1, wherein: the side surface of the oil cylinder is connected with an oil inlet joint, and the oil inlet joint is communicated with the annular oil groove through an oil duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121887132.2U CN216077900U (en) | 2021-08-12 | 2021-08-12 | Hydraulic tight-fitting bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121887132.2U CN216077900U (en) | 2021-08-12 | 2021-08-12 | Hydraulic tight-fitting bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216077900U true CN216077900U (en) | 2022-03-18 |
Family
ID=80669846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121887132.2U Active CN216077900U (en) | 2021-08-12 | 2021-08-12 | Hydraulic tight-fitting bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216077900U (en) |
-
2021
- 2021-08-12 CN CN202121887132.2U patent/CN216077900U/en active Active
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