CN209990765U - Anti-follow-up rotation washer for counterforce - Google Patents
Anti-follow-up rotation washer for counterforce Download PDFInfo
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- CN209990765U CN209990765U CN201920196015.8U CN201920196015U CN209990765U CN 209990765 U CN209990765 U CN 209990765U CN 201920196015 U CN201920196015 U CN 201920196015U CN 209990765 U CN209990765 U CN 209990765U
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Abstract
The utility model discloses a reaction force is prevented following and is changeed packing ring, including inner circle and outer lane, the axle center between inner circle and the outer lane is the same, and inner circle and outer lane are provided with the circumference restraint that can not relatively rotate. The counterforce of the fastening tool and the follow-up force possibly existing in the bolt are coaxially and symmetrically transmitted to the fastened piece, the counterforce is offset from the contact surface of the anti-follow-up washer and the fastened piece, two harmful factors are eliminated in the fastening system, the bolt is stressed more simply, and the reliability of the fastened piece is improved.
Description
Technical Field
The utility model belongs to the technical field of the fastener, especially, relate to reaction force and prevent following the packing ring that changes.
Background
In a common fastening system of bolt + nut (+ washer) + wrench ", the bolt as the most important part inevitably receives tensile (tensile stress), torsional (torque + shear stress) and bending (bending moment + shear stress) effects. Therefore, the stress condition of the bolt is complex, and the probability of failure of the fastener is increased.
In the fastening system, the stretching function is the key for fastening, and the effective tension of the fastening system is ensured; the nut is screwed tightly, the nut is connected with the bolt through a thread pair, due to the existence of friction force, the bolt can bear the twisting action and even rotate with the nut, if the twisting action of the bolt is to be eliminated, the structure of the nut needs to be changed, but a rotation-following prevention structure can be arranged, so that the bolt rotation with the nut is simply prevented; the bending phenomenon is caused by the fact that a bolt bears the bias force of a wrench during the tightening process, and a corresponding reaction force structure needs to be arranged when the bias force is eliminated.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model provides a reaction force is prevented following and is changeed the packing ring, and the modern design makes the bolt atress simpler, increases the reliability of fastener.
In order to achieve the above purpose, the technical solution of the present invention is as follows:
the anti-follow-up washer comprises an inner ring and an outer ring, wherein the axes between the inner ring and the outer ring are the same, and the inner ring and the outer ring are provided with circumferential constraints which cannot rotate relatively.
Furthermore, the inner side of the inner ring is provided with threads matched with corresponding bolts, and the outer side of the inner ring is provided with splines.
Furthermore, splines are arranged on the inner side and the outer side of the outer ring, the splines on the inner side of the outer ring are matched with the splines on the outer side of the inner ring, and the splines on the outer side are externally connected with a fastening tool; the front surface of the outer ring is a hardened antifriction plane; the reverse side of the outer ring is provided with a tooth shape or a knurl.
Further, the thickness of the inner ring is smaller than that of the outer ring, and the inner ring leans against one side of the reverse side of the outer ring in an initial state.
When the anti-follow-up washer is used, the reverse side of the anti-follow-up washer of the counterforce is firstly opposite to a fastened piece, the anti-follow-up washer is screwed on the bolt, and then the nut is screwed on.
The front surface of the outer ring is a hardened wear-resistant plane which is in contact with the nut so as to reduce the friction force of the contact surface and prevent or reduce the damage of the contact surface caused by friction when the nut is screwed down, so that the final pretightening force of each group of bolts tends to be consistent, and the accurate control of the pretightening force is convenient to realize; the outer side of the outer ring is provided with a spline or a spline-like structure for transmitting the reaction force of the fastening tool to a reaction force follow-up rotation preventing washer; the reverse side of the outer ring is provided with teeth or knurls to increase mechanical resistance, even form permanent impressions on a fastened piece, and the friction force between the counterforce anti-follow-up washer and the fastened piece is added, so that the counterforce anti-follow-up washer can sufficiently transmit the counterforce to the fastened piece.
The inner side of the inner ring is provided with threads matched with corresponding bolts and used for transmitting follow-up rotation force possibly existing in the bolts; the outer side of the inner ring is provided with a spline or a spline-like structure matched with the inner side of the outer ring, so that follow-up rotation force possibly existing in the bolt is transmitted to the outer ring and finally transmitted to a fastened piece.
So far, the reaction force of fastening tool, the follow-up force that the bolt probably exists have all been coaxial and symmetrical transmit to by the fastener on, offset in the contact surface of reaction force anti-follow-up washer with by the fastener, realized eliminating two kinds of harmful factors in fastening system, make the bolt atress simpler, increase the reliability of fastener.
Drawings
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments:
FIG. 1 is a three-dimensional schematic view of a reaction force anti-follow washer;
FIG. 2 is a schematic view of the outer ring structure;
FIG. 3 is a schematic view of an inner ring structure;
FIG. 4 is an exemplary application of a reaction anti-follow washer;
in the figure, 100-outer ring, 110-inner ring, 120-connected piece, 130-nut, 140-bolt.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.
Referring to fig. 1, 2 and 3, the reaction force anti-follow-up washer comprises an inner ring 110 and an outer ring 100, wherein the axes of the inner ring 110 and the outer ring 100 are the same, and the inner ring 110 and the outer ring 100 are provided with circumferential restraint which cannot rotate relatively.
The inner side of the inner ring 110 is provided with threads matched with corresponding bolts, the outer side of the inner ring 110 is provided with splines, the inner side and the outer side of the outer ring 100 are both provided with splines, the splines on the inner side of the outer ring 100 are matched with the splines on the outer side of the inner ring 110, and the splines on the outer side are externally connected with a fastening tool; the front surface of the outer ring 100 is a hardened antifriction plane; the reverse side of the outer ring 100 is provided with teeth or knurls, the thickness of the inner ring 110 is smaller than that of the outer ring 100, in an initial state, the inner ring 110 leans against one side of the reverse side of the outer ring 100, and gear rings of the inner ring 110 and the outer ring 100 both adopt involute splines.
The embodiment of the utility model is shown in fig. 4, will earlier prevent following the back-up washer of commentaries on classics as an integral part reverse side orientation by the link soon on bolt 140 to paste on by connecting piece 120 terminal surface, screw up hexagon nut 130 again. The male splines of the outer race 100 are then keyed to the female splines of the outer sleeve of the fastening tool and the male hex of the nut 130 is connected to the female hex of the inner sleeve of the fastening tool. At this time, the fastening tool is started, and the inner sleeve of the fastening tool drives the nut 130 to rotate clockwise, so as to generate a pretightening force; under the action of a pre-tightening force, the wavy tooth-shaped surface on the reverse side of the outer ring 100 is tightly attached to the connected piece 120, so that huge friction force is generated, even a permanent indentation is formed, and the outer ring 100 is prevented from rotating; the external splines of outer race 100 in turn prevent rotation of the outer sleeve of the fastening tool. By now the reaction force of the fastening system is eliminated inside the system. In addition, the spline link between the outer race 100 and the inner race 110 also prevents rotation of the inner race 110, and the thread pair of the inner race 110 and the bolt 140, limiting rotation of the bolt 140. To this end, the bolt 140 can only be circumferentially elongated and cannot rotate with the tightening action of the nut 130. Finally, the biasing force and the follow-up force that most affect the fastening system are eliminated inside the system, making the bolt 140 easier to apply and increasing the reliability of the fastener.
It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. Follow the packing ring that changes is prevented to reaction force, its characterized in that: the inner ring and the outer ring are provided with circumferential restraint which cannot rotate relatively.
2. The reaction force anti-follow washer according to claim 1, wherein: the inner side of the inner ring is provided with threads matched with corresponding bolts, and the outer side of the inner ring is provided with splines.
3. A reaction force anti-follow-up washer according to claim 1 or claim 2, wherein: splines are arranged on the inner side and the outer side of the outer ring, the splines on the inner side of the outer ring are matched with the splines on the outer side of the inner ring, and the splines on the outer side are externally connected with a fastening tool; the front surface of the outer ring is a hardened antifriction plane; the reverse side of the outer ring is provided with a tooth shape or a knurl.
4. The reaction force anti-follow washer according to claim 1, wherein: the thickness of the inner ring is smaller than that of the outer ring, and the inner ring leans against one side of the reverse side of the outer ring in an initial state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920196015.8U CN209990765U (en) | 2019-02-14 | 2019-02-14 | Anti-follow-up rotation washer for counterforce |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920196015.8U CN209990765U (en) | 2019-02-14 | 2019-02-14 | Anti-follow-up rotation washer for counterforce |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209990765U true CN209990765U (en) | 2020-01-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920196015.8U Active CN209990765U (en) | 2019-02-14 | 2019-02-14 | Anti-follow-up rotation washer for counterforce |
Country Status (1)
| Country | Link |
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| CN (1) | CN209990765U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114251341A (en) * | 2021-12-08 | 2022-03-29 | 华能新能源股份有限公司云南分公司 | High-strength bolt fastening method for wind turbine generator |
-
2019
- 2019-02-14 CN CN201920196015.8U patent/CN209990765U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114251341A (en) * | 2021-12-08 | 2022-03-29 | 华能新能源股份有限公司云南分公司 | High-strength bolt fastening method for wind turbine generator |
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