CN110725850A

CN110725850A - Tension self-locking type anti-loosening double-nut screw

Info

Publication number: CN110725850A
Application number: CN201910884645.9A
Authority: CN
Inventors: 岳景辉; 范学军; 姚孟; 王保方; 尚东升; 王伟; 秦艳军; 李辉; 房延杰; 郭超; 杨磊; 石晓伟; 李想; 王谦; 刘亚鹏; 袁茂森; 谢佳良
Original assignee: State Grid Corp of China SGCC; State Grid Hebei Electric Power Co Ltd; Handan Power Supply Co of State Grid Hebei Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; State Grid Hebei Electric Power Co Ltd; Handan Power Supply Co of State Grid Hebei Electric Power Co Ltd
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2020-01-24

Abstract

The invention relates to a tension self-locking anti-loosening double-female screw, which comprises an A female screw and a B female screw which are matched with each other, wherein the A female screw and the B female screw are provided with internal threads with the same inner diameter; the female screw A is a hexagonal prism with an internal thread hole in the center, and a tension boss in the shape of a truncated cone is arranged on the periphery of the internal thread hole; the female screw B is a hexagonal prism with an internal thread hole in the center, and a tension groove in the shape of a truncated cone is arranged on the periphery of the internal thread hole. The tension self-locking anti-loosening device is simple in structure, stable and reliable, and can achieve the tension self-locking anti-loosening function.

Description

Tension self-locking type anti-loosening double-nut screw

Technical Field

The invention relates to the technical field of installation and maintenance of electric power facilities, in particular to a tension self-locking type anti-loosening double-nut screw.

Background

The working principle of the nut is that the nut and the bolt are self-locked by friction force. But the reliability of such self-locking is reduced in dynamic loads. In some important occasions, some anti-loosening measures can be taken to ensure the locking reliability of the nut. One of the anti-loosening measures is the locking nut. Two types of locking nuts are provided, one type is that two identical nuts are screwed on the same bolt, and a tightening torque is added between the two nuts, so that the bolt connection is reliable. The other is a special locknut which needs to be used together with a lockwasher. The special anti-loose nut is not a hexagon nut but a middle-circle nut, 6 notches are formed in the circumference of the nut, and the six notches are the acting point of a screwing tool and the clamping position of a bayonet of an anti-loose gasket. The second type of anti-loosening is more reliable than the first type, but is relatively complex in construction.

The reinforcing screw is installed to modern iron tower, even adopt the iron tower of two female designs of full tower, also can't solve the not hard up problem of iron tower after long-time operation. The iron tower screws need to be fastened regularly.

Disclosure of Invention

The invention aims to provide a tension self-locking anti-loosening double-nut screw which is simple in structure, stable and reliable.

The invention adopts the following technical scheme:

the utility model provides a tension is from locking double female screw of lock, its includes A female screw and the B female screw of mutually supporting, A female screw and B female screw have the internal thread that the internal diameter is the same.

Further, the female screw A is a hexagonal prism with an internal thread hole arranged at the center, and a tension boss in the shape of a truncated cone is arranged on the periphery of the internal thread hole.

Further, the female screw B is a hexagonal prism with an internal thread hole arranged at the center, and a tension groove in the shape of a truncated cone is arranged on the periphery of the internal thread hole.

Further, the A female screw is provided with a water drainage ring groove on the periphery of the tension boss.

Furthermore, the opposite sides of the A female screw and the B female screw are provided with drainage inclined planes which are matched with each other and incline to the same side.

Furthermore, a plurality of drainage grooves communicated with the drainage ring groove are formed in the drainage inclined plane.

Furthermore, the diameters of the bottom surface of the truncated cone of the tension boss and the bottom surface of the truncated cone of the tension groove are equal, and the half conical angle alpha corresponding to the tension boss is 1.2 ~ 1.6.6 times of the half conical angle beta corresponding to the tension groove.

Further, the half conical angle α corresponding to the tension boss is 1.5 times of the half conical angle β corresponding to the tension groove.

Further, the corresponding half conical angle α of the tension boss is 6 °.

Further, the half cone angle β corresponding to the tension groove is 4 °.

The invention has the beneficial effects that: the tension boss on the female screw A and the tension groove on the female screw B are matched with each other correspondingly, and the female screw B forms external pressure on the female screw A in the screwing process, so that the internal polymerization force of the female screw A deforms to realize the gripping and clamping deformation. The invention increases the external extrusion type polymerization force on the basis of keeping the characteristics of the original traditional screw, thereby achieving the purpose of fastening without looseness.

Drawings

Fig. 1 is a schematic cross-sectional structure of the present invention.

Fig. 2 is a schematic top view of the B-box screw in fig. 1.

Fig. 3 is a bottom view of the female screw B in fig. 1.

Fig. 4 is a schematic top view of the female screw a in fig. 1.

Fig. 5 is a bottom view of the female screw a in fig. 1.

Wherein, 1A female screw, 2B female screw, 3 tension bosses, 4 tension grooves, 5 water discharge ring grooves, 6 water discharge inclined planes, 7 water discharge grooves, 8 bolts, 9 internal thread holes, a half cone angle corresponding to alpha tension bosses and a half cone angle corresponding to beta tension grooves.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. 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 application.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited to the specific embodiments disclosed below.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

Example 1

The utility model provides a tension is from locking two female screws of locking type, its includes A female screw 1 and B female screw 2 of mutually supporting, A female screw 1 and B female screw 2 have the internal thread that the internal diameter is the same.

The A female screw 1 is a hexagonal prism with an internal thread hole in the center, and a tension boss 3 in the shape of a truncated cone is arranged on the periphery of the internal thread hole.

The female screw 2 of B is the hexagonal prism that the center is provided with the internal thread hole, the internal thread hole periphery is provided with the tension groove 4 of frustum of a cone shape.

The diameters of the bottom surface of the cone frustum of the tension boss 3 and the bottom surface of the cone frustum of the tension groove 4 are equal; the half conical angle alpha corresponding to the tension boss 3 is 1.2 times of the half conical angle beta corresponding to the tension groove 4.

Example 2

The A female screw 1 is a hexagonal prism with an internal thread hole 9 in the center, and a tension boss 3 in the shape of a truncated cone is arranged on the periphery of the internal thread hole 9.

The female screw 2 of B is the hexagonal prism that the center is provided with internal thread hole 9, the tension groove 4 of frustum of a cone shape is provided with to internal thread hole 9 periphery.

The diameters of the bottom surface of the cone frustum of the tension boss 3 and the bottom surface of the cone frustum of the tension groove 4 are equal; the half conical angle alpha corresponding to the tension boss 3 is 1.6 times of the half conical angle beta corresponding to the tension groove.

Example 3

The diameters of the bottom surface of the cone frustum of the tension boss 3 and the bottom surface of the cone frustum of the tension groove 4 are equal; the half conical angle alpha corresponding to the tension boss is 1.5 times of the half conical angle beta corresponding to the tension groove. The half cone angle refers to a half cone angle corresponding to the cone frustum.

In the use, at first screw the female screw in bolt 8 of A and screw in the female screw of B again, the tension boss of the female screw of A is relative with the tension recess of the female screw of B, screws up the in-process of the female screw of B, and the tension boss can be extruded gradually to the tension recess for the female screw of A takes place deformation, and the internal thread of the female screw of A is further bitten with the external screw thread on the bolt, realizes the locking, can not become flexible.

The working principle of the method is that ∠ alpha is 1.2 ∠ beta, the working principle of the method is that ∠ alpha is 1.6 ∠ beta, the working principle of the method is that ∠ alpha is 1.5 ∠ beta, an excessively small angle difference (smaller than 1.2) causes the contact area of the A female screw and the B female screw to be too small, the deformation pitch of the A female screw is short when the screw is tightly pressed, and the locking effect is affected, while an excessively large angle difference (larger than 1.6) causes the extrusion force of the B female screw to be weakened (the A female screw cannot be deformed) or a large stroke is needed to meet the tightening requirement, and the method is inconvenient to use and cannot meet the requirement.

Example 4

The A female screw 1 is provided with a water drainage ring groove 5 on the periphery of the tension boss 3.

And the opposite sides of the A female screw 1 and the B female screw 2 are provided with drainage inclined planes 6 which are matched with each other and incline to the same side.

And a plurality of drainage grooves 7 communicated with the drainage ring groove 5 are arranged on the drainage inclined surface 6.

The diameters of the bottom surface of the cone frustum of the tension boss 3 and the bottom surface of the cone frustum of the tension groove 4 are equal; the half conical angle alpha corresponding to the boss is 1.5 times of the half conical angle beta corresponding to the groove.

Because A box screw and B box screw are at the tight in-process in top, because the bottom surface of the frustum of a cone of tension boss 3 and the bottom surface diameter of the frustum of a cone of tension recess 4 are equal, the two can not laminate together completely, there is certain space below, if meet the rainy and snowy weather, water can be discharged into the drainage annular under the guide of drainage recess, because whole bottom surface is the inclined plane, water can be further drained out the drainage annular by the drainage recess on the drainage inclined plane, avoid A box screw and B box screw gap department ponding between the screw, the protection screw is not corroded.

Example 5

The diameters of the bottom surface of the cone frustum of the tension boss 3 and the bottom surface of the cone frustum of the tension groove 4 are equal; the corresponding half conical angle alpha of the lug boss is 6 degrees. The corresponding half conical angle beta of the groove is 4 degrees.

The embodiment is the best embodiment, when the half cone angle alpha and the half cone angle beta are respectively 6 degrees and 4 degrees, the height-diameter ratio of the A female screw and the B female screw is proper, and the self-locking effect is also best.

The female screw A can adopt a steel grade with strong toughness on the basis of keeping the original hardness; the hardness of the B female screw is 1-2 higher than that of the A female screw, and the brittleness cannot be increased.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. The utility model provides a locking pair of box screw of tension self-locking type which characterized in that, it includes A box screw (1) and B box screw (2) of mutually supporting, A box screw (1) and B box screw (2) have the internal thread that the internal diameter is the same.

2. The tension self-locking anti-loosening double-female screw according to claim 1, wherein the A female screw (1) is a hexagonal prism provided with an internal thread hole (9) at the center, and the periphery of the internal thread hole (9) is provided with a tension boss (3) in the shape of a truncated cone.

3. The tension self-locking anti-loosening double female screw according to claim 2, wherein the B female screw (2) is a hexagonal prism provided with an internal threaded hole (9) at the center, and the periphery of the internal threaded hole (9) is provided with a tension groove (4) in the shape of a truncated cone.

4. The tension self-locking type anti-loosening double female screw according to claim 3, wherein the A female screw (1) is provided with a drainage ring groove (5) on the periphery of the tension boss (3).

5. The tension self-locking type anti-loose double female screw according to claim 4, characterized in that the opposite sides of the A female screw (1) and the B female screw (2) are provided with drainage slopes (6) which are mutually matched and inclined to the same side.

6. The tension self-locking anti-loose double-female screw according to claim 5, characterized in that a plurality of drainage grooves (7) communicated with the drainage ring groove (5) are arranged on the drainage inclined surface (6).

7. The tension self-locking anti-loosening double female screw as claimed in claim 6, wherein the diameters of the bottom surfaces of the truncated cones of the tension boss (3) and the tension groove (4) are equal, and the half conical angle α corresponding to the tension boss (3) is 1.2 ~ 1.6.6 times of the half conical angle β corresponding to the tension groove (4).

8. The tension self-locking anti-loose double-female screw as claimed in claim 6, wherein the diameters of the bottom surface of the truncated cone of the tension boss (3) and the bottom surface of the truncated cone of the tension groove (4) are equal; the half conical angle alpha corresponding to the tension boss (3) is 1.5 times of the half conical angle beta corresponding to the tension groove (4).

9. The tension self-locking type anti-loose double-female screw according to claim 8, characterized in that the corresponding half conical angle α of the tension boss (3) is 6 °.

10. The tension self-locking type anti-loose double-female screw according to claim 8, characterized in that the corresponding half conical angle β of the tension groove (4) is 4 °.