CN116576178A - Torque stretching expansion bolt - Google Patents
Torque stretching expansion bolt Download PDFInfo
- Publication number
- CN116576178A CN116576178A CN202310772691.6A CN202310772691A CN116576178A CN 116576178 A CN116576178 A CN 116576178A CN 202310772691 A CN202310772691 A CN 202310772691A CN 116576178 A CN116576178 A CN 116576178A
- Authority
- CN
- China
- Prior art keywords
- spline
- expansion
- nut
- torque
- expansion sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001125 extrusion Methods 0.000 claims description 14
- 230000000694 effects Effects 0.000 abstract description 8
- 210000001503 joint Anatomy 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
- F16B13/066—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting a separate expander-part, actuated by the screw, nail or the like
- F16B13/068—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting a separate expander-part, actuated by the screw, nail or the like expanded in two or more places
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The application relates to the field of bolts, in particular to a torque stretching expansion bolt. An upper thread part is arranged above the male spline collar and is matched with a corresponding upper nut; the lower part of the screw is provided with a lower thread part and is matched with a corresponding lower nut; an inner spline gasket is sleeved on the outer side of the outer spline convex ring; the screw rod is sleeved with an expansion sleeve positioned between the male ring of the external spline and the lower threaded part, and the lower end surface of the internal spline gasket is in contact fit with the expansion sleeve. According to the torque stretching expansion bolt, the screw rod penetrates through the flange when the torque stretching expansion bolt is used through the cooperation of the upper threaded part, the upper nut, the lower threaded part, the lower nut, the internal spline gasket, the expansion sleeve and the like, the lower threaded part extends out of the lower surface of the flange, and the lower nut is screwed for torque fixation; then the upper nut is rotated, so that the upper nut pushes the inner spline gasket to extrude the upper surface of the flange and extrude the expansion sleeve, the expansion sleeve is deformed while the tensile force is formed, the fastening effect of the bolt is further improved, and the novel expansion sleeve has the characteristics of high efficiency, safety and reliability.
Description
Technical Field
The application relates to the field of bolts, in particular to a torque stretching expansion bolt.
Background
In the conventional fastening technique, fastening of the bolt is generally achieved only by torque control, but this manner does not completely secure fastening force of the bolt, and problems such as loosening, deformation, and cracking are easily generated. For some fields with high fastening effect and bolts for transmitting torsional force, such as aerospace, automobile industry, ships, wind power and other fields, the existing torque fastening mode cannot achieve a good entering effect. Therefore, there is a need to design a fastening structure that is efficient, safe, and reliable with lateral expansion forces.
Disclosure of Invention
Aiming at the defects in the prior art, the application provides a torque stretching expansion bolt.
The technical scheme adopted by the application is as follows: the torque stretching expansion bolt comprises a screw, wherein an external spline convex ring is arranged at the upper part of the screw, an upper thread part is arranged above the external spline convex ring, and a corresponding upper nut is matched with the external spline convex ring; the lower part of the screw is provided with a lower thread part and is matched with a corresponding lower nut; an inner spline gasket is sleeved on the outer side of the outer spline convex ring, and the lower end of the upper nut is contacted with the upper end face of the inner spline gasket; the screw rod is sleeved with an extrusion ring positioned above the expansion sleeve between the male ring and the lower thread part, and the lower end surface of the internal spline gasket is in contact fit with the extrusion ring.
In order to better realize the application, the application also comprises an extrusion ring sleeved on the screw rod, wherein the upper end of the extrusion ring is contacted with the lower end of the internal spline gasket, and the lower end of the extrusion ring is contacted with the upper end of the expansion sleeve.
In order to better realize the application, the part of the screw rod matched with the expansion sleeve is in a frustum shape with small upper end and large lower end.
In order to better realize the application, a first annular groove which is convenient for the extrusion ring to move downwards is arranged on the screw rod.
In order to better realize the application, a lower expansion joint and an upper expansion joint are arranged on the expansion sleeve; the upper end of the lower expansion joint is provided with a first stop hole, and the lower end of the lower expansion joint extends to the lower end of the expansion sleeve; the upper end of the upper expansion joint extends to the upper end of the expansion sleeve, and the lower end of the upper expansion joint is provided with a second stop hole.
In order to better realize the application, the outer side of the male spline convex ring is provided with a first spline matched with the female spline gasket.
In order to better realize the application, the inner side of the lower end of the upper nut is provided with a second annular groove which is convenient for the male spline convex ring to freely pass through.
In order to better realize the application, a second spline matched with the hydraulic spanner is arranged on the inner side of the top of the screw rod.
In order to better realize the application, the upper end of the upper nut is provided with a latch which is convenient to be matched with a hydraulic spanner.
The beneficial effects of the application are as follows: according to the torque stretching expansion bolt, when the torque stretching expansion bolt is used, the screw rod passes through a fastening workpiece, the lower threaded part passes through the fastening workpiece, and the lower nut or a bottom buckle bolt of the fastening workpiece is screwed for torque fixation through the matching of the screw rod, the external spline convex ring, the upper threaded part, the upper nut, the lower threaded part, the lower nut, the internal spline gasket, the expansion sleeve and the like; then the upper nut is rotated, so that the upper nut pushes the inner spline gasket to extrude the upper surface of the flange and extrude the expansion sleeve, the expansion sleeve deforms and the outer diameter becomes larger when the tensile force is formed, the bolt provides axial compression force for a fastening workpiece and also provides radial expansion force, the fastening effect of the bolt is further improved, and the novel screw bolt has the characteristics of high efficiency, safety and reliability.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a schematic view of a torque draw expansion bolt of the present application;
FIG. 2 is a schematic view of a torque draw expansion bolt connection flange according to the application;
FIG. 3 is a schematic view of an expansion shell of a torque draw expansion bolt of the present application;
in the drawing, a screw rod, a 2-external spline convex ring, a 3-upper threaded part, a 4-lower threaded part, a 5-second spline, a 6-latch, a 7-first spline, an 8-internal spline gasket, a 9-upper nut, a 10-lower nut, an 11-hydraulic wrench, a 12-flange, a 13-expansion sleeve, a 14-extrusion ring, a 15-first annular groove, a 16-first stop hole, a 17-lower expansion joint, a 18-second stop hole and a 19-upper expansion joint.
Detailed Description
Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.
It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application pertains.
Examples:
as shown in fig. 1 to 3, the torque stretching expansion bolt of the application comprises a screw 1, wherein an external spline convex ring 2 is arranged at the upper part of the screw 1, an upper thread part 3 is arranged above the external spline convex ring 2, and a corresponding upper nut 9 is matched; a lower thread part 4 is arranged at the lower part of the screw 1 and is matched with a corresponding lower nut 10; an inner spline gasket 8 is sleeved on the outer side of the outer spline convex ring 2, and the lower end of the upper nut 9 is contacted with the upper end surface of the inner spline gasket 8; an expansion sleeve 13 positioned between the male spline collar 2 and the lower threaded part 4 is sleeved on the screw 1, and the lower end surface of the female spline gasket 8 is in contact fit with the expansion sleeve 13. According to the torque stretching expansion bolt, when the torque stretching expansion bolt is used, the screw 1 passes through a fastening workpiece 12, the lower threaded part 4 extends out of the lower surface of the fastening workpiece 12, and the lower nut 10 is screwed tightly to fix the torque through the cooperation of the screw 1, the male spline collar 2, the upper threaded part 3, the upper nut 9, the lower threaded part 4, the lower nut 10, the inner spline gasket 8, the expansion sleeve 13 and the like; then the upper nut 9 is rotated, so that the upper nut 9 pushes the inner spline gasket 8 to extrude the upper surface of the flange 12 and the expansion sleeve 13, the expansion sleeve 13 is deformed while forming a tensile force, the bolt fastening effect is further improved, and the novel high-efficiency high-safety high-reliability expansion bolt has the characteristics of high efficiency, safety and reliability.
Preferably, the screw rod 1 further comprises a squeezing ring 14 sleeved on the screw rod 1, the upper end of the squeezing ring 14 is in contact with the lower end of the internal spline gasket 8, and the lower end of the squeezing ring 14 is in contact with the upper end of the expansion sleeve 13. After the design, when the upper nut 9 rotates to move downwards, the internal spline gasket 8 is pushed to extrude and fasten the workpiece 12 and the extrusion ring 14, so that the expansion sleeve 13 is conveniently deformed while the tensile force is formed, the bolt fastening effect is further improved, and the novel screw bolt fastening device has the characteristics of high efficiency, safety and reliability. Further preferably, the part of the screw 1 matched with the expansion sleeve 13 is in a frustum shape with a small upper end and a large lower end, and the screw 1 is provided with a first annular groove 15 which is convenient for the extrusion ring 14 to move downwards, so that the extrusion ring 14 has a moving space, the expansion sleeve 13 also has a deformation space, and the fastening effect is improved.
Preferably, a lower expansion joint 17 and an upper expansion joint 19 are arranged on the expansion sleeve 13; the upper end of the lower expansion gap 17 is provided with a first stop hole 16, and the lower end extends to the lower end of the expansion sleeve 13; the upper end of the upper expansion gap 19 extends to the upper end of the expansion shell 13, and the lower end is provided with a second stop hole 18. The lower expansion joint 17 and the upper expansion joint 19 are arranged to facilitate the deformation of the expansion sleeve 13, and the first stop hole 16 and the second stop hole 18 can prevent the expansion sleeve 13 from being penetrated and torn by external force when being deformed. Different numbers of lower expansion joints 17 and upper expansion joints 19 can be formed according to actual demand conditions.
A first spline 7 matched with an internal spline gasket 8 is arranged on the outer side of the external spline convex ring 2. Preferably, the outside of external spline bulge loop 2 be provided with internal spline gasket 8 complex first spline 7, external spline bulge loop 2 pass through first spline 7 cooperation internal spline gasket 8, can guarantee that internal spline gasket 8 can not radially become flexible, also can not circumferentially follow the rotation, only can axial movement, improved the fastening effect greatly.
Preferably, a second annular groove which is convenient for the male spline convex ring 2 to freely pass through is arranged on the inner side of the lower end of the upper nut 9, after the design is performed, a space is reserved for the male spline convex ring 2, the lower end surface of the upper nut 9 does not collide with the male spline convex ring 2 in the feeding and downward moving process, and the lower end surface only contacts with the pad 8 to apply acting force to the female spline gasket 8.
Preferably, the second spline 5 matched with the hydraulic wrench 11 is arranged on the inner side of the top of the screw 1, and the latch 6 convenient to be matched with the wrench 11 is arranged at the upper end of the upper nut 9, so that the screw can be conveniently matched with the hydraulic wrench 11 in a butt joint manner, and the fastening operation is convenient.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description.
Claims (9)
1. The torque stretching expansion bolt is characterized in that: the novel screw comprises a screw rod (1), wherein an external spline convex ring (2) is arranged at the upper part of the screw rod (1), an upper thread part (3) is arranged above the external spline convex ring (2), and a corresponding upper nut (9) is matched with the screw rod; a lower thread part (4) is arranged at the lower part of the screw (1) and is matched with a corresponding lower nut (10); an inner spline gasket (8) is sleeved on the outer side of the outer spline convex ring (2), and the lower end of the upper nut (9) is contacted with the upper end face of the inner spline gasket (8); an expansion sleeve (13) positioned between the external spline convex ring (2) and the lower thread part (4) is sleeved on the screw (1), and the lower end surface of the internal spline gasket (8) is in contact fit with the expansion sleeve (13).
2. The torque draw expansion bolt of claim 1 and further comprising: the screw rod (1) is characterized by further comprising an extrusion ring (14) sleeved on the screw rod (1), wherein the upper end of the extrusion ring (14) is in contact with the lower end of the internal spline gasket (8), and the lower end of the extrusion ring (14) is in contact with the upper end of the expansion sleeve (13).
3. The torque draw expansion bolt of claim 2 and further comprising: the part of the screw rod (1) matched with the expansion sleeve (13) is in a frustum shape with a small upper end and a large lower end.
4. A torque draw expansion bolt according to claim 3 and characterised in that: the screw (1) is provided with a first annular groove (15) which is convenient for the extrusion ring (14) to move downwards.
5. The torque draw expansion bolt of claim 4 and further comprising: a lower expansion joint (17) and an upper expansion joint (19) are arranged on the expansion sleeve (13); the upper end of the lower expansion joint (17) is provided with a first stop hole (16), and the lower end of the lower expansion joint extends to the lower end of the expansion sleeve (13); the upper end of the upper expansion joint (19) extends to the upper end of the expansion sleeve (13), and the lower end of the upper expansion joint is provided with a second stop hole (18).
6. The torque draw expansion bolt of claim 5 and further comprising: the outer side of the male spline convex ring (2) is provided with a first spline (7) matched with the female spline gasket (8).
7. The torque draw expansion bolt of claim 6 and further comprising: the inner side of the lower end of the upper nut (9) is provided with a second annular groove which is convenient for the male spline collar (2) to pass freely.
8. The torque draw expansion bolt of claim 7 and further comprising: the inner side of the top of the screw rod (1) is provided with a second spline (5) matched with a hydraulic wrench (11).
9. The torque draw expansion bolt of claim 8 and further comprising: the upper end of the upper nut (9) is provided with a latch (6) which is convenient to be matched with a hydraulic spanner (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310772691.6A CN116576178A (en) | 2023-06-27 | 2023-06-27 | Torque stretching expansion bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310772691.6A CN116576178A (en) | 2023-06-27 | 2023-06-27 | Torque stretching expansion bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116576178A true CN116576178A (en) | 2023-08-11 |
Family
ID=87534319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310772691.6A Pending CN116576178A (en) | 2023-06-27 | 2023-06-27 | Torque stretching expansion bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116576178A (en) |
-
2023
- 2023-06-27 CN CN202310772691.6A patent/CN116576178A/en active Pending
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| PB01 | Publication | ||
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