CN216768043U - Close-fitting bolt system - Google Patents
Close-fitting bolt system Download PDFInfo
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- CN216768043U CN216768043U CN202122692625.7U CN202122692625U CN216768043U CN 216768043 U CN216768043 U CN 216768043U CN 202122692625 U CN202122692625 U CN 202122692625U CN 216768043 U CN216768043 U CN 216768043U
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- taper sleeve
- cylindrical surface
- taper
- outer cylindrical
- tight
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Abstract
The utility model provides a tight-fitting bolt system which comprises a stud bolt, a taper sleeve and a nut, wherein the taper sleeve is sleeved on the stud bolt, and the nut is screwed on two sides of the stud bolt; gaskets can be additionally arranged on two sides of the taper sleeve; the stud comprises a first thread, a second thread and a conical surface; the inner side of the taper sleeve comprises an inner cylindrical surface and an inner conical surface, and the outer side of the taper sleeve comprises a first outer cylindrical surface and a second outer cylindrical surface; a groove is formed in the outer side of the taper sleeve along the axial direction; a chamfer is arranged at the taper large end of the taper sleeve, and a check ring is arranged at the taper small end of the taper sleeve; and a torque bearing structure is arranged on the retaining ring. The utility model has the beneficial effects that: simple structure, simple operation can realize whole operations with the spanner, and is with low costs, efficient, and it is low to operator's technical ability requirement.
Description
Technical Field
The utility model relates to the field of fasteners, in particular to a tight-fitting bolt system.
Background
Many fastening applications require fasteners to have interference fit, self-centering, and positioning functions.
The traditional close-fitting stud has extremely high precision requirements on the stud and a bolt hole, and even needs to be assembled and disassembled by being assisted with heating or refrigerating equipment.
Moreover, the centering bolt derived from the hydraulic tight-fitting bolt needs a special hydraulic system, and the operation is not convenient.
In view of this, we propose a tight-fitting bolt system.
Disclosure of Invention
In order to solve the technical problem, the utility model discloses a close-fitting bolt system, and the technical scheme of the utility model is as follows:
a tight-fitting bolt system comprises a stud bolt, a taper sleeve and a nut, wherein the taper sleeve is sleeved on the stud bolt, and the nut is screwed on two sides of the stud bolt;
the stud comprises a first thread, a second thread and a conical surface;
the first thread and the second thread are positioned at two ends of the stud bolt, and the conical surface is positioned in the middle of the stud bolt;
the inner side of the taper sleeve comprises an inner cylindrical surface and an inner conical surface, and the outer side of the taper sleeve comprises a first outer cylindrical surface and a second outer cylindrical surface;
preferably, the outer diameter of the first outer cylindrical surface is smaller than the outer diameter of the second outer cylindrical surface.
The inner cylindrical surface is connected with the taper small end of the inner conical surface, the first outer cylindrical surface is connected with the second outer cylindrical surface, and the second outer cylindrical surface is arranged on the outer side of the inner conical surface;
a groove is formed in the outer side of the taper sleeve along the axial direction;
a chamfer is arranged at the taper large end of the taper sleeve, and a check ring is arranged at the taper small end of the taper sleeve;
the retainer ring is provided with a moment bearing structure;
preferably, the torque receiving structure is selected from one of a spline and a hexagon;
preferably, the taper sleeve further comprises gaskets, and the gaskets are located on two sides of the taper sleeve.
By implementing the technical scheme of the utility model, the technical problem that a close-fitting stud system in the prior art is inconvenient to install and operate can be solved; the close-fitting stud bolt provided by the utility model is simple and reasonable in structure and convenient and fast to operate. The full operation can be realized by using a spanner, the cost is low, the efficiency is high, and the requirement on the skill of an operator is low.
The utility model can also be used in high-precision fastening occasions, and can use the hydraulic stretcher to expand the taper sleeve and the pre-tightening nut in the occasions with accurate interference or pre-tightening force requirements; it is also possible to replace the nuts and washers at both ends with mechanical tension nuts or to replace the washers with reaction force washers, thereby operating with a special torque wrench.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only one embodiment of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of the close-fitting stud system of an embodiment;
FIG. 2 is a schematic view of a stud structure according to an embodiment;
FIG. 3 is a front view of a taper sleeve structure provided by the embodiment;
fig. 4 is a left side view of the taper sleeve structure provided by the embodiment.
In the above drawings, the reference numerals denote:
1a, a first thread;
1b, a second thread;
1c, a conical surface;
2a, an inner cylindrical surface;
2b, an inner conical surface;
2c, a first cylindrical surface;
2d, a second cylindrical surface;
2e, a groove;
2f, chamfering;
2g, a check ring.
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.
Examples
In a specific embodiment, as shown in fig. 1, 2, 3 and 4, a tight-fitting bolt system comprises a stud bolt 1, a taper sleeve 2, a washer 3 and a nut 4, wherein the taper sleeve 2 is sleeved on the stud bolt 1, the washer 3 is positioned at two sides of the taper sleeve 2, and the nut 4 is screwed at two sides of the stud bolt 1;
the stud bolt 1 comprises a first thread 1a, a second thread 1b and a conical surface 1 c;
the first threads 1a and the second threads 1b are positioned at two ends of the stud bolt 1, and the conical surface 1c is positioned in the middle of the stud bolt 1;
the inner side of the taper sleeve 2 comprises an inner cylindrical surface 2a and an inner conical surface 2b, and the outer side of the taper sleeve 2 comprises a first outer cylindrical surface 2c and a second outer cylindrical surface 2 d;
the inner cylindrical surface 2a is connected with the taper small end of the inner conical surface 2b, the first outer cylindrical surface 2c is connected with the second outer cylindrical surface 2d, and the second outer cylindrical surface 2d is arranged outside the inner conical surface 2 b;
the outer side of the taper sleeve 2 is provided with grooves 2e along the axial direction, so that the taper sleeve 2 can expand or contract conveniently, and the number of the grooves 2e is 4 in the embodiment;
the taper large end of the taper sleeve 2 is provided with a chamfer 2f, so that the taper sleeve 2 can conveniently penetrate into a bolt hole with a staggered opening, and the angle of the chamfer 2f is 8 degrees in the embodiment;
a check ring 2g which is integrally formed with the taper sleeve 2 is arranged at the small taper end of the taper sleeve 2; for axial positioning of the taper sleeve 2;
and the outer side of the retainer ring 2g is provided with a torque bearing structure which is convenient for erecting a reaction force arm, such as a hexagon and a spline. In this embodiment, the torque receiving structure is hexagonal;
the outer diameter of the first outer cylindrical surface 2c is smaller than the outer diameter of the second outer cylindrical surface 2 d;
in this embodiment, the inner conical surface 2b of the taper sleeve 2 and the conical surface 1c of the stud bolt 1 are mutually matched, which is a key part of the tight-fitting bolt system for generating radial dimension change. The diameter of the first outer cylindrical surface 2c is smaller than that of the second outer cylindrical surface 2d, so that the length of the second outer cylindrical surface 2d is shortened, and the processing difficulty can be effectively reduced; the length of the inner conical surface 2b is the same as that of the second outer cylindrical surface 2d in this embodiment.
During installation, the stud bolt 1 and the taper sleeve 2 penetrate into the bolt hole, and the check ring 2g leans against the end face of the bolt hole. And then a washer 3 and a nut 4 with small taper ends are installed, the nut 4 is screwed down to enable the stud bolt 1 to generate axial displacement, and the diameter of the taper sleeve 2 is increased by means of matching of the conical surface 1c and the inner conical surface 2b, so that a gap between the second outer cylindrical surface 2d of the taper sleeve 2 and the bolt hole is eliminated, a certain interference magnitude is generated, and the centering and positioning effects are achieved. When the interference magnitude reaches a set value, the tightening action is stopped, the gasket 3 and the nut 4 with large taper ends are installed and tightened, and the installation of the tight-fitting bolt is completed when a preset pretightening force is reached.
During disassembly, the nut 4 at the small taper end is firstly disassembled, then the nut 4 at the large taper end is continuously screwed, so that the stud bolt 1 generates the axial displacement opposite to that during installation until the stud bolt 1 is separated from the inner conical surface 2b of the taper sleeve 2, and at the moment, the taper sleeve 2 is restored to be in clearance fit with the bolt hole and can be easily taken out.
The tight-fitting bolt system that this embodiment provided simple structure is reasonable, the simple operation. The full operation can be realized by using a spanner, the cost is low, the efficiency is high, and the requirement on the skill of an operator is low.
The embodiment can also be used in high-precision fastening occasions, and the hydraulic stretcher can be used for expanding the taper sleeve 2 and the pre-tightening nut 4 in the occasions where the interference magnitude or the pre-tightening force is required to be accurate; the nut 4 and the washer 3 at both ends may be replaced with a mechanical tension nut, or the washer 4 may be replaced with a reaction washer, thereby operating with a special torque wrench.
It should be understood that the above-described embodiments are merely exemplary of the present invention, and are not intended to limit the present invention, and that any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (7)
1. A close-fitting bolt system characterized in that: the device comprises a stud bolt, a taper sleeve and a nut, wherein the taper sleeve is sleeved on the stud bolt, and the nut is screwed on two sides of the stud bolt;
the stud comprises a first thread, a second thread and a conical surface;
the first thread and the second thread are positioned at two ends of the stud bolt, and the conical surface is positioned in the middle of the stud bolt;
the inner side of the taper sleeve comprises an inner cylindrical surface and an inner conical surface, and the outer side of the taper sleeve comprises a first outer cylindrical surface and a second outer cylindrical surface;
the inner cylindrical surface is connected with the taper small end of the inner conical surface, the first outer cylindrical surface is connected with the second outer cylindrical surface, and the second outer cylindrical surface is arranged on the outer side of the inner conical surface;
a groove is formed in the outer side of the taper sleeve along the axial direction;
a chamfer is arranged at the taper large end of the taper sleeve, and a check ring is arranged at the taper small end of the taper sleeve;
and a torque bearing structure is arranged on the retaining ring.
2. The tight-fitting bolt system according to claim 1, wherein: still include the packing ring, the packing ring is located taper sleeve both sides.
3. The tight-fitting bolt system according to claim 1, wherein: the outer diameter of the first outer cylindrical surface is smaller than the outer diameter of the second outer cylindrical surface.
4. The tight-fitting bolt system according to claim 1, wherein: the torque receiving structure is selected from one of a spline and a hexagon.
5. The tight-fitting bolt system according to claim 4, wherein: the moment bearing structure is hexagonal.
6. The tight-fitting bolt system according to claim 1, wherein: the chamfer angle is 8 °.
7. The tight-fitting bolt system according to claim 1, wherein: the number of slots is 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122692625.7U CN216768043U (en) | 2021-11-05 | 2021-11-05 | Close-fitting bolt system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122692625.7U CN216768043U (en) | 2021-11-05 | 2021-11-05 | Close-fitting bolt system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216768043U true CN216768043U (en) | 2022-06-17 |
Family
ID=81960240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122692625.7U Active CN216768043U (en) | 2021-11-05 | 2021-11-05 | Close-fitting bolt system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216768043U (en) |
-
2021
- 2021-11-05 CN CN202122692625.7U patent/CN216768043U/en active Active
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