CN216097428U - Bolt stretcher with protective structure - Google Patents
Bolt stretcher with protective structure Download PDFInfo
- Publication number
- CN216097428U CN216097428U CN202122665488.8U CN202122665488U CN216097428U CN 216097428 U CN216097428 U CN 216097428U CN 202122665488 U CN202122665488 U CN 202122665488U CN 216097428 U CN216097428 U CN 216097428U
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- sleeve
- nut
- stretcher body
- bolt
- stretcher
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Abstract
The utility model discloses a bolt stretcher with a protection structure, which comprises a stretcher body, wherein a piston slides in the stretcher body, a sleeve is fixed on the stretcher body, a nut sleeve is inserted in the sleeve in a sliding manner, the sleeve is connected with a mounting block for limiting the nut sleeve, a protection sleeve is sleeved at one end of the sleeve in a sliding manner, and the sleeve is connected with a backing ring for limiting the protection sleeve; the nut sleeve is used for sleeving a nut on a bolt, the end part of the sleeve is in contact with a workpiece, when the piston is in threaded connection with the bolt, the nut sleeve is abutted against the stretcher body, the nut sleeve can be disassembled by moving the nut sleeve and the mounting block to be separated from the sleeve, the nut sleeve of other types can be conveniently replaced for sleeving the nut, the protecting sleeve is pushed by the elasticity of the spring to extrude the backing ring and the stretcher body, the stretcher body is prevented from loosening, and the stretcher body is protected.
Description
Technical Field
The utility model relates to the field of stretchers, in particular to a bolt stretcher with a protection structure.
Background
The bolt stretcher is a bolt hydraulic stretcher for short, the stretching force is determined according to the tensile strength, the yield coefficient and the elongation of a material by virtue of a hydraulic source provided by a hydraulic booster pump, the stretched tension generated by an ultrahigh pressure oil pump is utilized to stretch a bolt with applied force in an elastic deformation area, the diameter of the bolt is slightly deformed, so that a nut is easy to loosen, and after a piston in the bolt stretcher is in threaded connection with the bolt, the piston is pushed by pressurizing in the bolt stretcher to move the stretching bolt, so that the bolt is loosened and pre-tightened.
After a piston in a traditional bolt stretcher is in threaded connection with a bolt on a workpiece, the contact force between a sleeve of the bolt stretcher and the workpiece is small, so that the bolt stretcher is not easy to stretch, and a nut sleeve in the sleeve is not easy to detach.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide a bolt tensioner with a protection structure to achieve the aim.
The utility model provides the following technical scheme: a bolt stretcher with a protection structure comprises a stretcher body, wherein a piston slides in the stretcher body, a sleeve is fixed on the stretcher body, a nut sleeve is inserted in the sleeve in a sliding manner, and the sleeve is connected with an installation block for limiting the nut sleeve;
the stretcher is characterized in that a protective sleeve is sleeved at one end of the sleeve in a sliding mode, the sleeve is connected with a backing ring used for limiting the protective sleeve, the end portion of the backing ring is in close contact with the stretcher body, and a spring is connected between the sleeve and the backing ring.
Preferably, a rotating groove is formed in the sleeve, the mounting block slides in the rotating groove, and the mounting block is fixedly connected with the outer wall of the nut sleeve.
Preferably, the sleeve is slidably sleeved on the backing ring.
Preferably, the sleeve is provided with a through hole, the outer wall of the nut sleeve is provided with a dismounting hole, and a dismounting rod is slidably inserted into the through hole and the dismounting hole.
Compared with the prior art, the utility model has the beneficial effects that:
1. the nut sleeve is used for sleeving a nut on a bolt, the end part of the sleeve is in contact with a workpiece, when the piston is in threaded connection with the bolt, the stretcher body is abutted, the nut sleeve can be disassembled by moving the nut sleeve and the mounting block to be separated from the sleeve, and the nut sleeve of other types can be conveniently replaced for sleeving the nut.
2. According to the utility model, after the piston is in threaded connection with the bolt, the stretcher body moves rightwards, so that the protective sleeve is in contact with the workpiece and slides outside the sleeve to compress the spring until the end part of the sleeve, which is far away from the piston, is in contact with the workpiece at the same time, the stretcher body is tightly abutted, the protective sleeve is pushed by the elasticity of the spring to extrude the backing ring and the stretcher body, the stretcher body is prevented from loosening, and the stretcher body is protected.
3. According to the utility model, the protecting sleeve and the cushion ring are moved rightwards, so that the protecting sleeve and the cushion ring are separated from the sleeve, and the spring is convenient to disassemble and replace.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view showing a state of the connecting bolt threaded in the piston according to the present invention;
FIG. 3 is a schematic structural view of a sleeve, nut sleeve and mounting block of the present invention;
fig. 4 is a schematic structural view of the stretcher body, the sleeve and the through hole of the utility model.
In the figure: 1. the tensioner comprises a tensioner body, 2, a piston, 3, a sleeve, 4, a protective sleeve, 5, a backing ring, 6, a spring, 7, a nut sleeve, 8, an installation block, 9, a rotating groove, 10, a bolt, 11, a workpiece, 12, a nut, 13, a through hole, 14, a dismounting hole, 15 and a dismounting rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: a bolt stretcher with a protection structure comprises a stretcher body 1, wherein a piston 2 slides in the stretcher body 1, a sleeve 3 is fixed on the stretcher body 1, a nut sleeve 7 is inserted in the sleeve 3 in a sliding manner, the sleeve 3 is connected with an installation block 8 for limiting the nut sleeve 7, a bolt 10 connected with a workpiece 11 is inserted into the stretcher body 1 and is in threaded connection with the inside of the piston 2, and a nut 12 enters the nut sleeve 7;
in the utility model, the nut sleeve 7 is used for sleeving the nut 12 on the bolt 10, the end part of the sleeve 3 is contacted with the workpiece 11, so that the stretcher body 1 is tightly propped when the piston 2 is in threaded connection with the bolt 10, the nut sleeve 7 can be disassembled by moving the nut sleeve 7 and the mounting block 8 to be separated from the sleeve 3, and the nut sleeve 7 of other types can be conveniently replaced for sleeving the nut 12.
The protection structure comprises a protection sleeve 4, a cushion ring 5 and a spring 6, wherein the protection sleeve 4 is sleeved at one end of a sleeve 3 in a sliding mode, the sleeve 3 is connected with the cushion ring 5 used for limiting the protection sleeve 4, the end part of the cushion ring 5 is in close contact with the stretcher body 1, and the spring 6 is connected between the sleeve 3 and the cushion ring 5;
in the utility model, a piston 2 in a stretcher body 1 is rotated to be in threaded connection with a bolt 10 on a workpiece, so that the stretcher body 1 moves rightwards, a protective sleeve 4 is in contact with the workpiece 11 and slides outside a sleeve 3 to compress a spring 6 until the end part of the sleeve 3, which is far away from the piston 2, and the protective sleeve 4 are in contact with the workpiece 11 at the same time, the stretcher body 1 is abutted tightly, the protective sleeve 4 is pushed by the elasticity of the spring 6 to extrude a cushion ring 5 and the stretcher body 1, the stretcher body 1 is prevented from loosening, the stretcher body 1 is protected, and the stretcher body 1 is favorable for working.
As a technical optimization scheme of the utility model, a rotating groove 9 is formed in the sleeve 3, the mounting block 8 slides in the rotating groove 9, the mounting block 8 is fixedly connected with the outer wall of the nut sleeve 7, the mounting block 9 in the rotating groove 9 limits the nut sleeve 7 in the sleeve 3, and the end part of the rotating groove 9 is opened and is used for moving out the mounting block 8.
As a technical optimization scheme of the utility model, the sleeve 3 is sleeved with the cushion ring 5 in a sliding manner, the protecting sleeve 4 and the cushion ring 5 are moved rightwards, so that the protecting sleeve 4 and the cushion ring 5 are separated from the sleeve 3, and the spring 6 is convenient to disassemble and replace.
As a technical optimization scheme of the utility model, the sleeve 3 is provided with a through hole 13, the outer wall of the nut sleeve 7 is provided with a dismounting hole 14, a dismounting rod 15 is inserted in the through hole 13 and the dismounting hole 14 in a sliding manner, the nut 12 enters the nut sleeve 7, when the bolt 10 is stretched through the operation of the stretcher body 1, the dismounting rod 15 is applied with force to rotate the nut sleeve 7, the nut 12 is rotated, the nut 12 is loosened and pre-tightened, the dismounting rod 15 is pulled out, and the dismounting rod 15 is inserted into the next dismounting hole 14 to continue to rotate the nut sleeve 7.
The working principle is as follows: the nut sleeve 7 is used for sleeving a nut 12 on a bolt 10, the end part of the sleeve 3 is in contact with a workpiece 11, when the piston 2 is in threaded connection with the bolt 10, the stretcher body 1 is abutted and tightly disassembled by moving the nut sleeve 7 and the mounting block 8 to separate from the sleeve 3, the nut sleeve 7 can be disassembled, the nut sleeves 7 of other types can be conveniently replaced and used for sleeving the nuts 12, the piston 2 in the stretcher body 1 is rotated to be in threaded connection with the bolt 10 on the workpiece, the stretcher body 1 is moved to the right, the protecting sleeve 4 is in contact with the workpiece 11 and slides outside the sleeve 3 to compress the spring 6 until the end part of the sleeve 3 departing from the piston 2 and the protecting sleeve 4 are simultaneously in contact with the workpiece 11, the stretcher body 1 is abutted and tightly, the protecting sleeve 4 is pushed to extrude the backing ring 5 and the stretcher body 1 through the elastic force of the spring 6, so that the stretcher body 1 is prevented from loosening, and the stretcher body 1 is protected.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a bolt stretcher with protective structure, includes stretcher body (1), stretcher body (1) slides there is piston (2), stretcher body (1) is fixed with sleeve (3), its characterized in that: a nut sleeve (7) is inserted into the sleeve (3) in a sliding manner, and the sleeve (3) is connected with an installation block (8) for limiting the nut sleeve (7);
protective sleeve (4) have been cup jointed in sleeve (3) one end slip, sleeve (3) are connected with and are used for spacingly backing ring (5) of protective sleeve (4), backing ring (5) tip with stretcher body (1) in close contact with, sleeve (3) with be connected with spring (6) between backing ring (5).
2. The bolt tensioner as claimed in claim 1, wherein: a rotating groove (9) is formed in the sleeve (3), the mounting block (8) slides in the rotating groove (9), and the mounting block (8) is fixedly connected with the outer wall of the nut sleeve (7).
3. The bolt tensioner as claimed in claim 1, wherein: the sleeve (3) is sleeved with the backing ring (5) in a sliding mode.
4. The bolt tensioner as claimed in claim 1, wherein: the nut sleeve is characterized in that the sleeve (3) is provided with a through hole (13), the outer wall of the nut sleeve (7) is provided with a dismounting hole (14), and a dismounting rod (15) is inserted into the through hole (13) and the dismounting hole (14) in a sliding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122665488.8U CN216097428U (en) | 2021-11-01 | 2021-11-01 | Bolt stretcher with protective structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122665488.8U CN216097428U (en) | 2021-11-01 | 2021-11-01 | Bolt stretcher with protective structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216097428U true CN216097428U (en) | 2022-03-22 |
Family
ID=80712451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122665488.8U Active CN216097428U (en) | 2021-11-01 | 2021-11-01 | Bolt stretcher with protective structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216097428U (en) |
-
2021
- 2021-11-01 CN CN202122665488.8U patent/CN216097428U/en active Active
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